Safety seats and their impact shields

Abstract

The present disclosure relates to an impact shield (2) and a safety seat including the impact shield (2). The impact shield (2) includes a fixed base (3), a movable portion (4), and an adjustment mechanism (5). The fixed base (3) is adapted to be connected to a seat body of the safety seat. The movable portion (4) is movably connected to the fixed base (3). The adjustment mechanism (5) is disposed between the fixed base (3) and the movable portion (4) and is configured to adjust the position of the movable portion (4) relative to the fixed base (3).

Description

[Technical Field]

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS This application claims priority to Chinese Patent Application No. 202211405993.1, filed with the State Intellectual Property Administration of China on November 10, 2022. The contents of the above-identified Chinese patent application are hereby incorporated by reference in their entirety for all purposes.

[0002] FIELD OF THE DISCLOSURE The present disclosure relates to the field of child carriers, and more particularly to safety seats and impact shields thereof. [Background technology]

[0003] Conventional safety seats equipped with impact shields restrain occupants on the safety seat via the impact shield. In the event of emergency braking, the impact shield can reduce the impact force on the occupant leaning forward and absorb the impact force on the spine and neck to protect the cervical vertebrae. Safety seats with adjustable impact shields are known. Conventional impact shields are connected to the seat body of the safety seat via a detachable connection mechanism, and the position of the impact shield relative to the seat body cannot be adjusted. Therefore, the safety seat has a fixed, non-adjustable seating space. Such safety seats cannot meet the seating requirements of children of various body sizes. Summary of the Invention [Means for solving the problem]

[0004] A first aspect of the present disclosure provides an impact shield applicable to a safety seat. The impact shield includes a fixed base, a movable portion, and an adjustment mechanism. The fixed base is adapted to be connected to a seat body of the safety seat. The movable portion is movably connected to the fixed base. The adjustment mechanism is disposed between the fixed base and the movable portion and is configured to adjust the position of the movable portion relative to the fixed base.

[0005] In a first aspect of the present disclosure, the adjustment mechanism includes a drive unit movably connected to the movable part, the drive unit rotatably connected to the fixed base to drive and move the movable part, and a rotation axis of the drive unit intersects with the direction of movement of the movable part.

[0006] In a first aspect of the present disclosure, the rotation axis of the drive unit is perpendicular to the direction of movement of the movable part.

[0007] In a first aspect of the present disclosure, the adjustment mechanism includes a drive unit extending through the movable part and including a rotating shaft and a gear, the gear is fastened to the rotating shaft and arranged coaxially with the rotating shaft, the movable part includes a rack configured to engage the gear, and the drive unit is configured to be rotatably connected to a fixed base, whereby, upon rotation of the drive unit, the movable part is driven to move relative to the fixed base by engagement between the gear and the rack.

[0008] In a first aspect of the present disclosure, the movable part includes a first band hole, the rack is disposed on a hole wall of the first band hole, and the first band hole is configured to allow the gear to rotate within the first band hole.

[0009] In a first aspect of the present disclosure, the racks are arranged along an arcuate line or a straight line.

[0010] In a first aspect of the present disclosure, the adjustment mechanism includes a locking unit including a locking member. The locking member is engaged with the rotating shaft to rotate synchronously with the rotating shaft, the locking member is slidable relative to the rotating shaft along a rotation axis of the drive unit, and the locking member is configured to be operable to be selectively disposed in a locked position or an unlocked position along a sliding path. When disposed in the locked position, the locking member restricts rotation, and when disposed in the unlocked position, the locking member is able to rotate to drive the rotating shaft to rotate synchronously.

[0011] In a first aspect of the present disclosure, the adjustment mechanism includes a locking unit including a locking member, the locking member engaged with the rotating shaft to rotate synchronously therewith, the locking member slidable relative to the rotating shaft along a rotation axis of the drive unit, the locking member configured to be operable to be selectively disposed in a locked position or an unlocked position along a sliding path. The locking member includes a first engagement portion, and the fixed base includes a second engagement portion adapted to engage with the first engagement portion. When the locking member is disposed in the locked position, the first engagement portion engages with the second engagement portion, and when the locking member is disposed in the unlocked position, the first engagement portion disengages from the second engagement portion.

[0012] In a first aspect of the present disclosure, the fixed base includes a first limiting portion and the locking member includes a second limiting portion configured to cooperate with the first limiting portion to limit a sliding distance of the locking member relative to the movable portion in a direction away from the movable portion.

[0013] In a first aspect of the present disclosure, the adjustment mechanism includes a lock unit including a lock member. The fixed base includes a fixing hole extending through the fixed base. At least a portion of the lock member is received in the fixing hole. One end of the rotation shaft extends into the fixing hole and engages with the lock member. The lock member includes an engagement tooth, and an inner wall of the fixing hole includes an engagement groove configured to engage with the engagement tooth.

[0014] In a first aspect of the present disclosure, the locking member includes an annular outer circumferential surface. The engagement teeth are disposed on the outer circumferential surface. The engagement teeth have rounded edges on both circumferential sides of the outer circumferential surface.

[0015] In a first aspect of the present disclosure, the adjustment mechanism includes a lock unit including a lock member, the lock member having an annular outer peripheral surface, a plurality of engagement teeth arranged at equal intervals on the outer peripheral surface, and a plurality of engagement grooves arranged at equal intervals on an inner wall of a fixing hole, and the plurality of engagement teeth configured to engage with the plurality of engagement grooves, respectively.

[0016] In a first aspect of the present disclosure, the adjustment mechanism includes a lock unit including a lock member. The fixed base includes a fixing hole extending through the fixed base, at least a portion of the lock member is received in the fixing hole, and one end of the rotation shaft extends into the fixing hole and engages with the lock member. At least a portion of the lock member is shaped as a regular polygonal prism. At least a portion of the inner wall of the fixing hole defines a regular polygonal hole that aligns with the regular polygonal prism.

[0017] In a first aspect of the present disclosure, the fixed base includes a fixing hole extending through the fixed base. The adjustment mechanism includes a lock unit including a locking member. The locking member is disposed on a first side of the fixed base away from the movable part and positioned outside the fixing hole. One end of the rotating shaft extends through the fixing hole and engages with the locking member. The locking member is configured to abut or snap-fit ​​against the first side when disposed in the locked position for locking.

[0018] In a first aspect of the present disclosure, an engagement groove, end surface teeth, or engagement hole is disposed on a first side surface, and an engagement tooth, further end surface teeth, or pin shaft that aligns with the engagement groove, end surface teeth, or engagement hole is disposed on a side surface of the locking member facing the first side surface.

[0019] In a first aspect of the present disclosure, the adjustment mechanism includes a locking unit including a locking member, the locking member engaged with the rotating shaft to rotate synchronously with the rotating shaft, the locking member slidable relative to the rotating shaft along a rotation axis of the drive unit, the locking member configured to be selectively disposed in a locked position or an unlocked position along a sliding path. The locking unit further includes a first resetting member disposed between the fixed base and the locking member or between the movable part and the locking member. The first resetting member is configured to bias the locking member toward the locked position.

[0020] In a first aspect of the present disclosure, an adjustment mechanism includes a lock unit including a lock member, a first pin shaft, and a drive member fixedly connected to the lock member. The lock member engages with the rotary shaft to rotate synchronously with the rotary shaft, and the lock member is slidable relative to the rotary shaft along the rotation axis of the drive unit. One of the rotary shaft and the drive member includes a second band-shaped hole, and the other of the rotary shaft and the drive member is fixedly connected to the first pin shaft. The first pin shaft is inserted into the second band-shaped hole and is movable along the second band-shaped hole.

[0021] In a first aspect of the present disclosure, the drive member includes a mounting hole disposed in the axial direction of the rotary shaft, and one end of the rotary shaft is inserted into the mounting hole and is movable in the extension direction of the mounting hole.

[0022] In a first aspect of the present disclosure, the adjustment mechanism includes a lock unit including a lock member. The fixed base includes a fixing hole extending through the fixed base, and at least a portion of the lock member is received in the fixing hole. One end of the rotating shaft extends into the fixing hole and is movably connected to the lock member. An end of the lock member remote from the movable portion includes an operating portion, and at least a portion of the operating portion extends from the fixing hole.

[0023] In a first aspect of the present disclosure, the impact shield includes two fixed bases disposed on either side of the movable part, and two ends of the rotating shaft are rotatably connected to the two fixed bases on either side of the movable part, respectively.

[0024] In a first aspect of the present disclosure, the adjustment mechanism includes a locking unit. The locking unit includes a locking member and a drive rope. The locking member is movably connected to the rotating shaft. Both sides of the movable part include a fixed base and a locking unit. Two ends of the drive rope are respectively connected to the locking members on both sides of the movable part, so that the locking members on both sides of the movable part can be synchronously switched between a locked position and an unlocked position.

[0025] In a first aspect of the present disclosure, the drive member includes a first drive portion and a second drive portion, and for a lock unit disposed on one of the two sides of the movable portion, one of two ends of the drive rope is connected to the first drive portion of the drive member on one of the two sides of the movable portion, and the other of the two ends of the drive rope is connected to the second drive portion of the drive member on the other of the two sides of the movable portion.

[0026] In a first aspect of the present disclosure, the drive member includes a mounting hole, a first drive portion disposed outside the mounting hole, and a second drive portion disposed within the mounting hole. One end of a rotating shaft is inserted into the mounting hole. The rotating shaft includes a first mounting cavity extending through the rotating shaft. A drive rope extends through the first mounting cavity and the mounting hole. One of the two ends of the drive rope is connected to the first drive portion of the drive member on one of the opposite sides of the movable part, and the other of the two ends of the drive rope is connected to the second drive portion of the drive member on the other of the opposite sides of the movable part.

[0027] In a first aspect of the present disclosure, the drive unit includes at least one drive rod pivotally connected to a movable part and a fixed base.

[0028] In a first aspect of the present disclosure, the drive unit includes two drive rods, each of which is pivotally connected to a movable part and a fixed base.

[0029] In a first aspect of the present disclosure, the drive unit further includes a second pin shaft. The fixed base includes a first housing and a second housing, the second housing facing the movable part, the first housing and the second housing enclosing an accommodation cavity, the second housing including a first groove, and at least one drive rod disposed in the accommodation cavity. One end of the second pin shaft is fastened to the movable part, and another end of the second pin shaft is pivotally connected to the drive rod through the first groove.

[0030] In a first aspect of the present disclosure, the first groove has a first groove wall and a second groove wall, and the second pin shaft is movable along the first groove and abuts against the first groove wall or the second groove wall to limit the rotation range of the drive rod.

[0031] In a first aspect of the present disclosure, the adjustment mechanism includes a lock unit slidably disposed on the movable part and including a lock pin having a locked position and an unlocked position. The fixed base includes a plurality of positioning holes. When the lock pin is disposed in the locked position, it is inserted into one of the positioning holes, and when disposed in the unlocked position, it is separated from the positioning hole.

[0032] In a first aspect of the present disclosure, the fixed base includes a first housing and a second housing. The second housing faces the movable part. The first housing and the second housing enclose an accommodation cavity. The accommodation cavity includes a raised portion, and a plurality of positioning holes are disposed on the raised portion and extend in a direction parallel to the lock pin. The second housing includes a second groove, and when the lock pin is disposed in the locked position, the lock pin is inserted into one of the positioning holes through the second groove.

[0033] In a first aspect of the present disclosure, the adjustment mechanism further includes a locking unit and an operating unit connected to the locking unit, the operating unit operable to drive the locking unit to selectively restrict or allow movement of the movable part relative to the fixed base.

[0034] In a first aspect of the present disclosure, the adjustment mechanism further includes a lock unit and an operating unit. The operating unit includes an operating member movably disposed on the movable part, and a drive post slidably connected to the operating member and fixedly connected to the lock pin. The operating member is operable to drive and move the drive post.

[0035] In a first aspect of the present disclosure, the operating member includes a third band-shaped hole extending in a direction intersecting the direction of movement of the operating member, and the drive post is inserted into the third band-shaped hole and is movable along the third band-shaped hole.

[0036] In a first aspect of the present disclosure, the operating unit further includes a second reset member disposed between the movable portion and the operating member, the second reset member being configured to bias the operating member toward an initial position of the operating member where the movable portion is fixed relative to the fixed base.

[0037] In a first aspect of the present disclosure, the movable part is movable relative to the fixed base along a path of movement defined by a first position and a second position higher than the first position, the path of movement being curved.

[0038] In a first aspect of the present disclosure, the adjustment mechanism includes a locking unit configured to be operable to selectively limit or allow movement of the movable part relative to the fixed base.

[0039] A second aspect of the present disclosure provides a safety seat, the safety seat including a seat body and the impact shield described in the first aspect, the impact shield being connected to the seat body through a fixed base.

[0040] These and other objects, features, and advantages of the present disclosure will become more apparent from a more particular description of embodiments of the present disclosure, as illustrated in the accompanying drawings. Like reference numerals refer to like parts throughout the drawings. The drawings are intentionally not drawn to scale, emphasis instead being placed upon illustrating the gist of the present disclosure.

[0041] Other features, objects, and advantages of the present disclosure will become more apparent upon reading the detailed description of the non-limiting embodiments with reference to the following drawings. [Brief explanation of the drawings]

[0042] [Figure 1] 1 is a schematic structural diagram showing a safety seat according to a first embodiment of the present disclosure. [Figure 2] 2 is a side view of the safety seat shown in FIG. 1 with the movable part disposed in a first position. [Figure 3] 2 is a side view of the safety seat shown in FIG. 1 with the movable part disposed in a second position. [Figure 4] 2 is a schematic structural diagram showing an impact shield in the safety seat shown in FIG. 1. FIG. [Figure 5] 5 is a cross-sectional view of the impact shield shown in FIG. 4 with the locking member disposed in a locked position. [Figure 6] FIG. 6 is an enlarged view of a portion A in FIG. 5. [Figure 7] 5 is a cross-sectional view of the impact shield shown in FIG. 4 with the locking member disposed in an unlocked position. [Figure 8] FIG. 8 is an enlarged view of a portion B in FIG. [Figure 9] 3 is a cross-sectional view of an impact shield in the safety seat shown in FIG. 2. [Figure 10] 4 is a cross-sectional view of an impact shield in the safety seat shown in FIG. 3. [Figure 11] FIG. 10 is a cross-sectional view of an impact shield according to another embodiment of the present disclosure. [Figure 12]FIG. 5 is a schematic structural view showing a fixed base of the impact shield shown in FIG. 4. [Figure 13] 5 is a schematic structural view showing a locking member and a driving member of the impact shield shown in FIG. 4. [Figure 14] FIG. 10 is a schematic structural diagram illustrating a locking member and a driving member according to another embodiment of the present disclosure. [Figure 15] 1 is a cross-sectional view of an impact shield according to one embodiment of the present disclosure, with a locking member disposed in a locked position. [Figure 16] FIG. 16 is an enlarged view of a portion C in FIG. [Figure 17] 16 is a partially enlarged schematic view of the locking member of FIG. 15 disposed in an unlocked position. [Figure 18] 16 is a schematic structural diagram showing a first reset member, a drive member, and a drive rope of the impact shield shown in FIG. 15. FIG. [Figure 19] FIG. 4 is a schematic diagram illustrating a safety seat according to a second embodiment of the present disclosure. [Figure 20] 19 is a side view of the safety seat shown in FIG. 18 with the movable portion disposed in a first position. [Figure 21] 19 is another side view of the safety seat shown in FIG. 18 with the movable portion disposed in a second position. [Figure 22] FIG. 19 is a schematic structural diagram showing the impact shield of the safety seat shown in FIG. 18. [Figure 23] FIG. 23 is an exploded view of the impact shield shown in FIG. 22. [Figure 24] 22 is a schematic structural diagram showing a fixed base and a drive rod positioned on the side of the movable part of the impact shield shown in FIG. 21. FIG. [Figure 25] 22 is a schematic structural view showing the impact shield shown in FIG. 21 with the fixed base and drive rod removed. [Figure 26] 22 is a cross-sectional view of the impact shield shown in FIG. 21 with the movable portion disposed in a first position and the two drive rods having the same length. [Figure 27]22 is another cross-sectional view of the impact shield shown in FIG. 21 with the movable portion disposed in a second position and the two drive rods having the same length. [Figure 28] 22 is yet another cross-sectional view of the impact shield shown in FIG. 21 with the movable portion disposed in a first position and the two drive rods having different lengths but the same direction of extension. [Figure 29] 22 is a further cross-sectional view of the impact shield shown in FIG. 21 with the movable portion disposed in a first position and the two drive rods having the same length but different extension directions. [Figure 30] 22 is yet another cross-sectional view of the impact shield shown in FIG. 21 with the movable portion disposed in a second position and the two drive rods having the same length but different extension directions. [Figure 31] 22 is a cross-sectional view of the movable portion of the impact shield shown in FIG. 21. [Figure 32] 22 is a bottom view of the impact shield shown in FIG. 21 with the second base of the movable part removed. DETAILED DESCRIPTION OF THE INVENTION

[0043] To facilitate understanding of the present disclosure, the present disclosure will now be described more fully with reference to the associated drawings. Preferred embodiments of the present disclosure are shown in the drawings. However, the present disclosure may be embodied in many different forms and is not limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.

[0044] It should be noted that when an element is said to be "connected" to another element, the element may be directly connected to and integral with the other element, or intermediate elements may also be present. The terms "attached," "end," "another end," and similar expressions used herein are for illustrative purposes only.

[0045] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which this disclosure belongs. The terms used in the description of this disclosure are only for describing specific embodiments and are not intended to limit the disclosure. As used herein, the term "and / or" includes any combination of one or more of the associated listed items.

[0046] In order to make the objectives, technical solutions and advantages of the present disclosure more apparent, the present disclosure will be described in more detail below with reference to drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present disclosure, and are not used to limit the present disclosure.

[0047] A first embodiment of the present disclosure provides a safety seat applicable to installation in a vehicle, i.e., a vehicle safety seat. This safety seat is usable for occupants of various body sizes, particularly children. As shown in FIGS. 1 to 4 , the safety seat includes a seat main body 1 and an impact shield 2. The seat main body 1 includes a seat surface 11 and a backrest 12. The impact shield 2 is disposed above the seat surface 11. After a child is placed in the safety seat, the impact shield 2 is detachably connected to the seat main body 1 and fastened to the seat main body 1 through a fixing device such as a safety belt, thereby restraining the child between the seat main body 1 and the impact shield 2.

[0048] The impact shield 2 includes a fixed base 3, a movable part 4, and an adjustment mechanism 5. In this embodiment, the impact shield 2 is connected to the seat main body 1 via the fixed base 3. Specifically, the fixed base 3 is detachably connected to the seat main body 1. For example, the fixed base 3 is engaged with or inserted into the seat main body 1, or is connected to the seat main body 1 by other means. An engagement groove 14 is formed between the seat surface 11 of the seat main body 1 and the armrest 13. The fixed base 3 is detachably engaged with the engagement groove 14. The movable part 4 is movably connected to the fixed base 3. The movable part 4 can move relative to the fixed base 3 along a movement path defined by at least a first position (shown in FIG. 2) and a second position (shown in FIG. 3). In this embodiment, the second position is higher than the first position. Specifically, the second position is farther from the seat surface 11 than the first position, and the second position is farther from the backrest 12 than the first position.

[0049] The adjustment mechanism 5 is disposed between the fixed base 3 and the movable part 4 and is configured to adjust the position of the movable part 4 relative to the fixed base 3. The adjustment mechanism 5 can adjust not only the distance between the movable part 4 and the backrest 12 in the horizontal direction, but also the distance between the movable part 4 and the seat surface 11 in the vertical direction, thereby providing the safety seat with an adjustable seating space, which can better meet the seating requirements of children of various body sizes and is convenient for use by children. Note that in this embodiment, children include infants and toddlers. The impact shield 2 is not only applicable to the safety seat in this embodiment, but also to portable cribs, strollers, and the like. In this embodiment, when the safety seat is used, the impact shield 2 is positioned in front of the backrest 12 and above the seat surface 11.

[0050] Specifically, as shown in FIGS. 5 to 8 , the adjustment mechanism 5 includes a drive unit 6 and a lock unit 7. The drive unit 6 is movably connected to the movable part 4. The drive unit 6 is rotatably connected to the fixed base 3 so as to drive the movable part 4 to move between at least a first position and a second position. The drive unit 6 has a rotation axis 9 relative to the fixed base 3. The rotation axis 9 intersects with the movement direction of the movable part 4. In this embodiment, the rotation axis 9 is perpendicular to the movement direction (see FIGS. 5 and 9 ). In other embodiments, the rotation axis 9 of the drive unit 6 relative to the fixed base 3 may not be perpendicular to the movement direction of the movable part 4. For example, the angle formed between the rotation axis 9 and the movement direction may be 80° or 100°, etc.

[0051] The locking unit 7 selectively restricts or allows movement of the movable part 4 relative to the fixed base 3. In this embodiment, when the impact shield 2 needs to be adjusted, the locking unit 7 is first unlocked and the movable part 4 is moved to the desired position by rotating the drive unit 6 relative to the fixed base 3. Then, when the locking unit 7 is locked, the rotation of the drive unit 6 relative to the fixed base 3 is restricted, thus restricting the movement of the movable part 4 relative to the fixed base 3, thereby positioning the movable part 4 at the desired position.

[0052] In one embodiment, as shown in FIGS. 5 to 8 , the drive unit 6 includes a rotating shaft 61 and a gear 62. The gear 62 is fastened to the rotating shaft 61 and is arranged coaxially with the rotating shaft 61. The rotating shaft 61 extends through the movable part 4 and from two opposite side surfaces of the movable part 4. Specifically, the movable part 4 has a channel (not labeled) extending from one side surface to the opposite side surface to receive the rotating shaft 61. In addition, as shown in FIG. 6 , a fixing hole 31 extends through the fixed base 3. The rotating shaft 61 extends from the side surface of the movable part 4 and is rotatably connected to the fixed base 3 through the fixing hole 31.

[0053] As shown in FIGS. 9 and 10 , a first band-shaped hole 41 is disposed on a side surface of the movable part 4. In this embodiment, two first band-shaped holes 41, respectively positioned on two opposing side surfaces of the movable part 4, are connected to each other through a channel. Note that the cross-sectional shape of the channel is not necessarily the same as the cross-sectional shape of the first band-shaped hole 41. A rotating shaft 61 extends through the first band-shaped hole 41 and is rotatably connected to the fixed base 3 through the fixed hole 31. A hole wall of the first band-shaped hole 41 includes a rack 42. The first band-shaped hole is configured to receive a gear 62 and allow the gear 62 to rotate within the first band-shaped hole 41. The rack 42 is engaged with the gear 62. When the gear 62 rotates, the rack 42 moves relative to the gear 62 to drive the movable part 4 to move between at least a first position and a second position relative to the fixed base 3.

[0054] Specifically, the hole wall of the first band-shaped hole 41 has a first end 411 and a second end 412. The first end 411 is positioned on a surface of the second end 412 that is away from the seat surface 11. The first end 411 is positioned on a surface of the second end 412 that is away from the backrest 12. As shown in FIG. 9, when the gear 62 is positioned at the first end 411, the movable part 4 is disposed in the first position. As shown in FIG. 10, when the gear 62 is positioned at the second end 412, the movable part 4 is disposed in the second position.

[0055] In this embodiment, the rack 42 is disposed on the lower hole wall of the first strip-shaped hole 41. In other embodiments, the rack 42 may also be disposed on the upper hole wall of the first strip-shaped hole 41. The engagement between the gear 62 and the rack 42 and the rotation of the gear 62 relative to the rack 42 allows for smoother adjustment of the position of the movable part 4 relative to the fixed base 3. On the other hand, the adjustment achieved by the engagement between the gear 62 and the rack 42 and the rotation of the gear 62 relative to the rack 42 can be almost infinitely variable, thereby allowing the movable part 4 to be smoothly adjusted to any position.

[0056] Referring again to FIGS. 4 to 6 , in this embodiment, the fixed bases 3 are disposed on both sides of the movable part 4, thereby enabling the impact shield 2 to be more firmly connected to the seat main body 1. Both ends of the rotating shaft 61 are rotatably connected to the fixed bases 3 positioned on both sides of the movable part 4. Two gears 62 are disposed on the rotating shaft 61. A first strip-shaped hole 41 is disposed on each side of the movable part 4. A rack 42 is disposed in each of the first strip-shaped holes 41 on both sides of the movable part 4. The two gears 62 are engaged with the racks 42 on both sides of the movable part 4, respectively. The rotating shaft 61 can rotate more stably by simultaneously rotating the two gears 62 along their respective racks 42. In other embodiments, three or more gears 62 may be provided.

[0057] In other embodiments, there may be only one pair of gears 62 and racks 42 engaged with each other. Alternatively, the first strip-shaped hole 41 may not be provided, and the racks 42 engaged with the gears 62 may be located on the lower end face of the impact shield 2 or on the side of the impact shield 2 adjacent the fixed base 3.

[0058] As shown in FIGS. 9 and 10 , the first strip-shaped hole 41 extends obliquely relative to a horizontal reference line. In one embodiment, the first strip-shaped hole 41 extends in a direction inclined at an angle of approximately 45° relative to the seat surface 11. In other embodiments, the angle formed between the first strip-shaped hole 41 and the seat surface 11 may also be greater than or less than 45°. The rack 42 is disposed on the lower hole wall of the first strip-shaped hole 41, thereby allowing the gear 62 to move in the first movement direction D1 or in a direction opposite to the first movement direction D1. The extension direction of the rack 42 can be set to determine the movement path of the movable part 4 between various positions (e.g., between the first position and the second position). In this embodiment, the movement path of the movable part 4 between the first position and the second position is linear. Since the rack 42 is disposed on the hole wall of the first strip-shaped hole 41, the movement path of the movable part 4 can be changed by changing the extension direction of the first strip-shaped hole 41.

[0059] 11 , the first band-shaped hole 41 may also be an arc-shaped hole, and the rack 42 extends along the arcuate profile of the arc-shaped hole and can move in the second movement direction D2 or the direction opposite to the second movement direction D2. Therefore, in this embodiment, the movement path of the movable part 4 between the first position and the second position is curved. When the gear 62 moves along the lower hole wall of the first band-shaped hole 41 to the first end 411 or the second end 412, it abuts against the hole wall at the first end 411 or the second end 412, thereby limiting the maximum movement range of the gear 62 on the rack 42 without providing additional limiting structures on either side of the rack 42.

[0060] 5 to 8, the lock unit 7 includes a lock member 71, a first reset member 72, a first pin shaft (not shown), and a drive member 75. In this embodiment, the lock unit 7 is disposed on the fixed base 3 on each side of the movable part 4. In other embodiments, the lock unit may also be disposed only on the fixed base 3 on one side of the movable part 4.

[0061] Specifically, as shown in FIGS. 6 and 8 , the locking member 71 is at least partially movably disposed within the fixing hole 31. Specifically, as shown in FIGS. 6 and 8 , the locking member 71 engages with the rotating shaft 61 so as to rotate synchronously therewith. The locking member 71 is slidable relative to the rotating shaft 61 along the rotation axis of the drive unit and is configured to be selectively disposed in a locked position or an unlocked position along a sliding path. As shown in FIG. 6 , when the locking member 71 is disposed in the locked position, rotation of the locking member 71 is restricted. Therefore, rotation of the rotating shaft 61 relative to the fixed base 3 is restricted. As shown in FIG. 8 , the locking member 71 can slide relative to the rotating shaft 61 along the rotation axis of the drive unit and move to the unlocked position. Note that the rotating shaft 61 and the locking member 71 do not rotate relative to each other. That is, when the locking member 71 is rotatable, it can drive the rotating shaft 61 to rotate. Therefore, when the locking member 71 is disposed in the unlocked position, the locking member 71 is operable to drive the rotating shaft 61 to rotate relative to the fixed base 3 .

[0062] 12 and 13 , the locking member 71 in this embodiment generally has the shape of a cylindrical knob. The locking member 71 has a cylindrical accommodation groove 714 arranged in its axial direction. The opening of the accommodation groove 714 faces the movable part 4. The locking member 71 includes an operating portion 712 on an end face remote from the accommodation groove 714. In this embodiment, the operating portion 712 is generally in the form of a tab structure perpendicular to the end face (remote from the accommodation groove 714) of the locking member 71, and the operating portion 712 extends at least partially from the fixing hole 31 to facilitate user operation. In this embodiment, the user can push the locking member 71 in a direction toward the movable part 4 via the operating portion 712 and simultaneously rotate the locking member 71.

[0063] As shown in FIG. 13 , the drive member 75 has a substantially cylindrical structure. The drive member 75 is fixed to a substantially central portion of the lock member 71 and extends toward the movable part 4. In this embodiment, the drive member 75 and the lock member 71 are integrally formed. In other embodiments, the drive member 75 and the lock member 71 may also be two separate components and may be connected to each other by welding, riveting, or the like. As shown in FIG. 8 , the drive member 75 includes a mounting hole 751 disposed in the axial direction of the rotating shaft 61. One end of the rotating shaft 61 is movably inserted into the mounting hole 751 through the fixing hole 31.

[0064] In one embodiment, the rotating shaft 61 may have a second band-shaped hole h2, and a first pin shaft 73 is fastened to the locking member 71. The first pin shaft 73 is fastened to the inner wall of the mounting hole 751. The first pin shaft 73 is inserted into the second band-shaped hole h2 and can move along the second band-shaped hole. The second band-shaped hole h2 extends parallel to the axial direction of the rotating shaft 61. The second band-shaped hole h2 may be a through hole or a blind hole. The first pin shaft 73 is inserted into the second band-shaped hole h2 in a direction perpendicular to the axial direction of the rotating shaft 61. By inserting and engaging the first pin shaft 73 into the second band-shaped hole h2, the driving member 75 and the locking member 71 can not only move along the axial direction of the rotating shaft 61, but also rotate synchronously with the rotating shaft 61. In other embodiments, the first pin shaft 73 may not be disposed perpendicular to the axial direction of the rotating shaft 61, i.e., the angle formed between the first pin shaft 73 and the axial direction of the rotating shaft may be greater than or less than 90°. Alternatively, conversely, the locking member 71 may include a second strip-shaped hole h2, and the rotating shaft 61 may include a first pin shaft 73 that can be inserted into and engaged with the second strip-shaped hole h2.

[0065] In other embodiments, the mounting hole 751 may not be located on the drive member 75, but may be located on the rotating shaft 61 and extend in the axial direction of the rotating shaft 61. The drive member 75 is inserted into the mounting hole 751. The first pin shaft 73 extending through the drive member 75 and the second band-shaped hole h2 located on the rotating shaft 61 allows the rotating shaft 61 to move in the extension direction of the mounting hole 751. Alternatively, the mounting hole 751 may not be located on either the drive member 75 or the rotating shaft 61, i.e., the drive member 75 does not cover the rotating shaft 61 or is not inserted into the rotating shaft 61, and the drive member may have a protruding portion (not shown) extending toward the movable part 4. The first pin shaft 73 is fastened to the protruding portion and movably inserted into the second band-shaped hole h2 of the rotating shaft.

[0066] 12 and 13, the locking member 71 includes a first engagement portion 711, and the fixed base 3 includes a second engagement portion 311 adapted to engage with the first engagement portion 711. When the locking member 71 is disposed in the locked position (as shown in FIG. 6), the first engagement portion 711 engages with the second engagement portion 311. When the locking member 71 is disposed in the unlocked position (as shown in FIG. 8), the first engagement portion 711 disengages from the second engagement portion 311.

[0067] As shown in FIG. 13 , the locking member 71 includes an annular outer peripheral surface 716 that surrounds the outer surface of the rotating shaft 61. In this embodiment, the first engagement portion 711 includes a plurality of engagement teeth equally spaced on the outer peripheral surface 716. The locking member 71 is at least partially provided as an external gear, and the teeth of the external gear are formed as engagement teeth. As shown in FIG. 12 , the second engagement portion 311 includes a plurality of engagement grooves equally spaced on the inner wall 313 of the fixing hole 31. Each of the plurality of engagement teeth can engage with a plurality of engagement grooves. Specifically, the fixing hole 31 is at least partially formed as an internal gear that can engage with the external gear, and gaps between adjacent gear teeth of the internal gear are formed as engagement grooves.

[0068] The combination of the engagement between the internal gear and the external gear, the engagement between the gear 62 and the rack 42, and the rotation of the gear 62 on the rack 42 can achieve almost infinitely variable adjustment of the movable part 4. The shortest distance that the movable part 4 can move depends on the elastic modulus of the gear 62 or the rack 42. The elastic modulus of the internal gear and the external gear must match that of the gear 62 or the rack 42 so that the external gear can still fit into and engage with the internal gear after the external gear and the gear 62 rotate synchronously within any range.

[0069] In other embodiments, as shown in FIG. 14 , the engagement teeth may also be arranged on only a portion of the outer circumferential surface 716. However, in order to rotate the engagement teeth of the locking member 71 in synchronization with the gear 62 and to enable the external gear to still fit into and mesh with the internal gear after the external gear has rotated in synchronization with the gear 62 over any range, a plurality of engagement grooves may be arranged at equal intervals on the inner wall 313 of the fixing hole 31. Alternatively, the engagement grooves may be arranged on a portion of the inner wall 313 of the fixing hole 31, and a plurality of engagement teeth may be arranged at equal intervals on the outer circumferential surface 716, so that the external gear can still fit into and engage with the internal gear after the external gear of the locking member 71 has rotated in synchronization with the gear 62 over any range. In other embodiments, the first engagement portion 711 may be formed as an engagement groove arranged on the outer circumferential surface 716, and the second engagement portion 311 may be formed as an engagement tooth arranged on the inner wall 313 of the fixing hole 31. However, the present disclosure is not limited thereto.

[0070] In other embodiments, the first engagement portion 711 may also be in the shape of a regular polygonal prism, with at least a portion of the inner wall 313 of at least a portion of the fixing hole 31 defining a regular polygonal hole that can engage with the regular polygonal prism to form the second engagement portion 311. The cross sections of the regular polygonal prism and the regular polygonal hole may be shaped like an equilateral triangle, a regular square, a regular hexagon, or the like, and the number of sides of the regular polygon should match the elastic modulus of the gear 62 or the rack 42. The minimum displacement of the movable part 4 can be adjusted by adjusting the number of sides of the regular polygon. When the locking member 71 is disposed in the locked position, the regular polygonal prism engages with the regular polygonal hole. The operating portion 712 can be pushed or pulled to drive the locking member 71 and move it along the rotating shaft 61 away from the fixing hole 31, thereby separating the regular polygonal prism from the regular polygonal hole. In this case, the operating portion 712 is rotated to rotate the rotary shaft 61, which drives the gear 62 to rotate on the rack 42.

[0071] In other embodiments, the locking member 71 may also be disposed on the surface of the fixed base 3 away from the movable part 4 and positioned outside the fixing hole 31. The side of the fixed base 3 away from the movable part 4 is assumed to be the first side. When the locking member 71 is disposed in the locked position, it can abut or fit into the first side to achieve locking. Alternatively, the second engagement portion 311 may be formed as an engagement groove, end surface teeth, or engagement hole disposed on the first side, and the first engagement portion 711 may be formed as an engagement tooth, additional end surface teeth, or pin shaft disposed on the side of the locking member 71 opposite the first side. When the locking member 71 is disposed in the locked position, the second engagement portion 311 on the first side engages or fits into the first engagement portion 711 on the locking member 71. In this case, the operating portion 712 can be pulled to drive the locking member 71 and move it along the rotating shaft 61 in a direction away from the movable portion 4, thereby unlocking the first engagement portion 711 and the second engagement portion 311. At the same time, the operating portion 712 is rotated to rotate the rotating shaft 61, which drives the gear 62 to rotate on the rack 42.

[0072] 13 and 14, the engagement teeth have rounded edges 7111 on both sides in the circumferential direction of the outer circumferential surface 716, which can guide the engagement teeth into the corresponding engagement grooves. In this way, even if the engagement teeth do not fully engage with the engagement grooves at first, it is only necessary to slightly move the movable part 4 to make the locking member 71 follow the rotation, and under the elastic force of the first reset member 72, the engagement teeth can be automatically guided into the engagement grooves via the rounded edges 7111 on both sides.

[0073] In one embodiment, as shown in FIGS. 12 and 13 , the fixing hole 31 includes a first limiting portion 32, and the locking member 71 includes a second limiting portion 713. The second limiting portion 713 abuts against the first limiting portion 32 to prevent the locking member 71 from moving in a direction away from the movable part 4 and disengaging from the fixed base 3. When the locking member 71 is disposed in the unlocked position, the first limiting portion 32 and the second limiting portion 713 are separated from each other. When the locking member 71 is disposed in the locked position, the first limiting portion 32 abuts against the second limiting portion 713. Specifically, as shown in FIG. 13 , an end face of an engagement tooth is formed on the second limiting portion 713. In this embodiment, the first limiting portion 32 and the second limiting portion 713 may not be provided, and at least a portion of the engagement tooth may move outside the fixing hole 31.

[0074] In other embodiments, the first limiting portion 32 and the second limiting portion 713 may not be provided. For example, the outer peripheral surface 716 of the locking member 71 or the inner peripheral surface (i.e., inner wall) 313 of the fixing hole 31 is formed as a truncated cone side surface having the rotating shaft 61 as its axial direction. That is, the outer peripheral surface 716 of the locking member 71 or the inner peripheral surface 313 of the fixing hole 31 has a cross section in the shape of a circle, and the diameter of this circle gradually decreases or increases along the extension direction of the rotating shaft 61. Movement of the locking member 71 in the direction away from the movable part 4 can be limited by the outer peripheral surface 716 of the locking member 71 abutting against the inner peripheral surface 313 of the fixing hole 31.

[0075] 6 and 8, the first reset member 72 may be disposed between the fixed base 3 and the lock member 71 or between the movable part 4 and the lock member 71. The first reset member 72 biases the lock member 71 toward the locked position. In this embodiment, the first reset member 72 covers the drive member 75, and the two ends of the first reset member 72 abut against the fixed base 3 and the lock member 71, respectively. The first reset member 72 may include an elastic member such as a spring or a resilient piece. When the movable part 4 is moved to a desired position, the lock member 71 can automatically move from the unlocked position to the locked position under the elastic force of the first return member 72, thereby restricting the rotation of the gear 62 relative to the rack 42. As a result, the position of the gear 62 relative to the rack 42 does not change.

[0076] 6 and 8 , taking the lock unit 7 positioned on one side of the movable part 4 as an example, the lock member 71 can be moved from the locked position to the unlocked position by pressing the operating part 712 in a direction toward the movable part 4, i.e., in the direction F1. As a result, the first engagement part 711 and the second engagement part 311 are switched from a state in which the first engagement part 711 and the second engagement part 311 are engaged with each other to a state in which the first engagement part 711 and the second engagement part 311 are separated from each other. Rotating the operating part 712 while maintaining the pressing force on it drives the gear 62, which can rotate on the rack 42 via the rotating shaft 61, as shown in FIGS. 9 and 10 . This adjusts the relative position between the movable part 4 and the fixed base 3.

[0077] When the movable part 4 is moved to the desired position, the pressing force is removed, and the locking member 71 moves in the reverse direction F1 from the unlocked position to the locked position under the action of the first reset member 72, thereby locking the movable part 4 in the desired position. In this embodiment, by simultaneously pressing and rotating the operating part 712, the gear 62 is driven to rotate on the rack 42. For ease of operation, at least a portion of the operating part 712 still extends from the fixing hole 31 when the locking member 71 is pressed to the unlocked position.

[0078] In this embodiment, the movable parts 4 can be moved synchronously relative to the fixed bases on both sides by simultaneously pressing and rotating the operating parts 712 of the locking members 71 connected to both ends of the rotating shaft using both hands. As shown in FIGS. 15 to 17 , the locking unit 7 may further include a drive rope 76. Optionally, the drive rope 76 may be a rigid or flexible rope such as a steel rope, hemp rope, or carbon fiber rope. Additionally, the rotating shaft 61 includes a first mounting cavity 611. The first mounting cavity 611 is disposed axially of the rotating shaft 61 and extends through both ends of the rotating shaft 61. The drive member 75 is connected to the locking member 71 and includes a first drive portion 752 and a second drive portion 753. In this embodiment, the first drive portion 752 is disposed outside the mounting hole 751, and the second drive portion 753 is disposed inside the mounting hole 751.

[0079] The configuration of the drive rope 76 will be described in detail below. For ease of explanation, both sides of the movable part 4 are defined as the first side and the second side, respectively. One end of the drive rope 76 of the locking unit 7 on the first side is connected to the first drive portion 752 of the drive member 75 on the first side. The other end of the drive rope 76 is wrapped around the end of the drive member 75 remote from the movable part 4, then passes through the mounting hole 751 and the first mounting cavity 611, and is connected to the second drive portion 753 of the drive member 75 on the second side. Similarly, the drive rope 76 of the locking unit 7 on the second side is connected to the first drive portion 752 on the second side, and similarly connected to the second drive portion 753 on the first side.

[0080] 16 and 18 , the two ends of the drive rope 76 each include an engagement member 761, and the first drive portion 752 and the second drive portion 753 on either side of the movable part 4 each include a first engagement groove 7521 and a second engagement groove 7531. The engagement members 761 at both ends of the drive rope 76 are engaged with the first engagement groove 7521 and the second engagement groove 7531, respectively. In other embodiments, the drive rope 76 may also be connected to the first drive portion 752 and the second drive portion 753 in other ways. However, the present disclosure is not limited to these embodiments.

[0081] As shown in FIGS. 16 and 17 , in this embodiment, when the locking member 71 positioned on a first side of the movable part 4 moves, the driving member 75 on the same side is driven by the locking member 71 to move. At the same time, the driving member 75 positioned on the second side of the movable part 4 is pulled by the drive rope 76 and synchronously moves away from or toward the movable part 4, thereby causing the locking members 71 on both sides of the movable part 4 to synchronously move toward or away from the movable part 4. Similarly, the same technical effect can be achieved when the locking member 71 positioned on the second side of the movable part 4 moves. That is, in the impact shield according to this embodiment, by operating the locking member 71 on either side of the movable part 4, the locking members 71 on both sides of the movable part 4 can be synchronously switched between the unlocked position and the locked position without synchronously operating the locking members 71 on both sides, thereby allowing the user to more conveniently adjust the position of the movable part 4 relative to the fixed base.

[0082] In this embodiment, the locking units on the first and second sides each include a first reset member. When the locking members 71 are not operated, the locking members 71 on the first and second sides automatically move from the unlocked position to the locked position under the action of the first reset member, thereby allowing the locking members 71 on both sides to automatically move from the locked position to the unlocked position. In other embodiments, the first reset member may be disposed only on the locking unit on either the first or second side. When the locking members 71 are not operated, the locking member 71 on one side (e.g., the first side) automatically moves from the unlocked position to the locked position under the action of the first reset member 72. The locking member 71 on the other side (e.g., the second side) can also be driven to move from the unlocked position to the locked position by being pulled by the drive rope 76, thereby synchronously resetting the locking members 71 on both sides of the movable part 4.

[0083] In other embodiments, the locking unit 7 may also include only one drive rope 76. In this case, only when the locking member 71 on one side (e.g., the first side) is being operated, the locking member 71 on the second side can be moved synchronously, and while the locking member 71 on the other side (e.g., the first side) is being operated, the locking member 71 on the first side cannot be moved synchronously.

[0084] The working principle of the adjustment mechanism in this embodiment is as follows.

[0085] When the operating portion 712 is not pressed, as shown in FIG. 16 , the locking member 71 is disposed in the locked position, and the first engagement portion 711 of the locking member 71 engages with the second engagement portion 311 on the inner wall 313 of the fixing hole 31, fixing the rotating shaft 61 relatively to the fixed base 3. When the position of the impact shield 2 needs to be adjusted, as shown in FIG. 17 , the operating portion 712 can be pressed to move the locking member 71 from the locked position to the unlocked position, thereby disengaging the first engagement portion 711 and the second engagement portion 311 from each other. At this time, the rotating shaft 61 can rotate relative to the fixed base 3. By rotating the operating portion 712 while pressing it, the rotating shaft 61 can rotate synchronously with the operating portion 712 to drive the gear 62 and rotate on the rack 42, thereby moving the movable part 4 relative to the fixed base 3. When the movable part 4 moves to the desired position, the pressing force on the operating part 712 is removed, and the locking member 71 moves from the unlocked position to the locked position under the elastic force of the first reset member 72, thereby locking the movable part 4 in the desired position.

[0086] As shown in FIGS. 19 to 21 , a second embodiment of the present disclosure also provides a safety seat, which includes a seat body 1 and an impact shield 2. The seat body 1 of this safety seat has the same configuration as the safety seat in the first embodiment. As shown in FIGS. 21 and 22 , the impact shield 2 in this embodiment also includes a fixed base 3, a movable part 4, and an adjustment mechanism 5. The movable part 4 in this embodiment has the same configuration as the movable part 4 in the first embodiment. The difference between the impact shield 2 in this embodiment and the impact shield 2 in the first embodiment lies in the configurations of the fixed base 3 and the adjustment mechanism 5.

[0087] 23 and 24 , the fixed base 3 includes a first housing 35 and a second housing 36 facing the movable part 4. The first housing 35 and the second housing 36 enclose the accommodating cavity 34. The second housing 36 includes a first groove 361 and a second groove 362. In this embodiment, the first groove 361 and the second groove 362 overlap. In other embodiments, the first groove 361 and the second groove 362 may also be spaced apart from each other.

[0088] 25 to 27, the adjustment mechanism 5 includes a drive unit 6, a lock unit 7, and an operation unit 8. In this embodiment, the drive unit 6 may also be rotatably connected to the fixed base 3 to drive the movable part 4 to move between the first position and the second position. The rotation axis of the drive unit 6 intersects with the movement direction of the movable part 4.

[0089] The drive unit 6 includes a drive rod 65, a second pin shaft 66, and a third pin shaft 67. The drive rod 65 is disposed in the receiving cavity 34 to reduce the gap between the movable part 4 and the fixed base 3, thereby preventing sandwich trapping. In other embodiments, the drive rod 65 may also be disposed between the fixed base 3 and the movable part 4. One end of the second pin shaft 66 is fastened to the movable part 4, and another end of the second pin shaft 66 is pivotally connected to the drive rod 65 via a first groove 361. The first groove 361 has a first groove wall 3611 and a second groove wall 3612. The second pin shaft 66 can move along the first groove 361 and abut against the first groove wall 3611 or the second groove wall 3612 to limit the rotation range of the drive rod 65, whereby the rotation of the drive rod 65 is limited between the first groove wall 3611 and the second groove wall 3612. In addition, a third pin shaft 67 is disposed on the second housing 36, and the drive rod 65 is pivotally connected to the second housing 36 via the third pin shaft 67.

[0090] In this embodiment, two drive rods 65 are disposed on at least one side of the fixed base 3 to guide the movement of the movable part 4. One end of each drive rod 65 is pivotally connected to the second housing 36 of the fixed base 3 via a third pin shaft 67, and the other end of each drive rod 65 is pivotally connected to the movable part 4 via a second pin shaft 66, thereby allowing the movable part 4 to move more stably and preventing the movable part 4 from tilting forward or backward when moving. The two drive rods 65 may have the same length or different lengths. In this embodiment, as shown in FIGS. 26 and 27 , the two drive rods 65 have the same length and extend in directions generally parallel to each other, allowing the two drive rods 65 to rotate synchronously and allowing the movable part 4 to move more smoothly. When the movable part 4 moves, the rotation angles of the two drive rods 65 are substantially the same. Thus, relative rotation between the drive unit 6 and the fixed base 3 can drive the movable part 4 to move between at least a first position and a second position.

[0091] In another embodiment, as shown in FIG. 28 , the two drive rods 65 may also have different lengths. In yet another embodiment, as shown in FIGS. 29 and 30 , the extension directions of the two drive rods 65 may also intersect. For example, the distance between the two third pin shafts 67 is different from the distance between the two second pin shafts 66, so that the extension directions of the two drive rods 65 are not parallel to each other. In other embodiments, the extension directions of the two drive rods 65 may also intersect, and the two drive rods 65 may have different lengths. Additionally, in other embodiments, there may be fewer than two drive rods 65, or there may be three or more drive rods 65.

[0092] In this embodiment, as shown in Figures 22 and 23, the fixed base 3 and the adjustment mechanism 5 are disposed on each side of the movable part 4. The drive rod 65 of each adjustment mechanism 5 is pivotally connected to the movable part 4 and the fixed base 3 on the corresponding side, respectively. The drive units 6 on both sides pivot synchronously, thereby allowing the movable part 4 to move smoothly. In other embodiments, the fixed base 3 and the adjustment mechanism 5 may be disposed on only one side of the movable part 4.

[0093] Specifically, as shown in FIGS. 23 and 24 , the lock unit 7 includes a lock pin 78. The lock pin 78 is slidably disposed on the movable part 4. The lock pin 78 has a locked position and an unlocked position. The fixed base 3 has a plurality of positioning holes 352 extending in a direction parallel to the lock pin 78. When the lock pin 78 is disposed in the locked position, it is inserted into one of the positioning holes 352 to limit relative movement between the movable part 4 and the fixed base 3. When the lock pin 78 is disposed in the unlocked position, it is separated from the positioning hole 352 to allow the movable part 4 to move relative to the fixed base 3. In this embodiment, the plurality of positioning holes 352 are disposed along an arcuate path, but the present disclosure is not limited thereto. In other embodiments, the plurality of positioning holes 352 may be disposed along a linear path inclined relative to the seat surface 11 by adjusting the number and positions of the second pin shafts 66 and the third pin shafts 67. In this embodiment, as shown in FIGS. 23 and 24 , a raised portion 351 is disposed within the accommodating cavity 34. The raised portion 351 includes a plurality of positioning holes 352. When the locking pin 78 is disposed in the locked position, it extends through the second groove 362 and is inserted into one of the positioning holes 352. The locking pin 78 is inserted into and engages with the various positioning holes 352, thereby achieving relative fixation between the movable part 4 and the fixed base 3. The second groove 362 and the first groove 361 are the same groove. In other embodiments, the positioning holes 352 may be disposed directly on the second housing 36 of the fixed base 3. The positioning holes 352 need to be disposed so as to avoid the first groove 361, and the second groove 362 is not necessary.

[0094] As shown in FIG. 23 , the operation unit 8 is connected to the lock unit 7. The operation unit 8 can be operated to drive the lock pin 78 to move between a locked position and an unlocked position. Specifically, the operation unit 8 includes an operation member 81, a drive post 82, and a second reset member 83. The operation member 81 is movably disposed on the movable part 4. The drive post 82 is slidably connected to the operation member 81 and fixedly connected to the lock pin 78. The operation member 81 is operable to drive and move the drive post 82, thereby driving the lock pin 78 to move between the locked position and the unlocked position.

[0095] Specifically, as shown in FIG. 23 , the operating member 81 includes a third strip-shaped hole 811. The extension direction of the third strip-shaped hole 811 intersects the movement direction of the operating member 81. The drive post 82 is inserted into the third strip-shaped hole 811 and can move along the third strip-shaped hole 811. Referring to FIGS. 31 and 32 , the operating member 81 moves in the front-to-rear direction, i.e., along the direction F2 shown in FIGS. 31 and 32 . By moving the operating member 81, the drive post 82 moves along the third strip-shaped hole 811, thereby driving the lock pin 78 to move between the locked position and the unlocked position. As shown in FIGS. 31 and 32 , the operating member 81 includes a handle portion 812 and a drive portion 813. The drive portion 813 is plate-shaped. The third strip-shaped holes 811 are arranged at the left and right ends of the driving part 813, i.e., at the ends of the driving part 813 in a direction perpendicular to the F1 direction. The handle part 812 protrudes from a substantially central part of the driving part 813 and is used to push and move the driving part 813.

[0096] As shown in FIGS. 23 and 31 , the movable part 4 may include a first base 43 and a second base 44. The first base 43 and the second base 44 engage with each other to form a second mounting cavity 45. The first base 43 includes an operating groove 431. The operating groove 431 communicates with the second mounting cavity 45. The drive part 813 is inserted into the second mounting cavity 45 and can move within the second mounting cavity 45. The handle portion 812 extends from the second mounting cavity 45 to the outside of the operating groove 431, so that the handle portion 812 can be operated to drive and move the drive part 813.

[0097] As shown in FIG. 31 , the second reset member 83 is disposed in the second mounting cavity 45 and positioned between the drive portion 813 and the second base 44. The movable portion 4 includes a first abutment portion 441 disposed in the second mounting cavity 45. The second abutment portion 84 is disposed on a surface of the drive portion 813 away from the handle portion 812. It can be understood that the second abutment portion 84 may also be disposed in the second mounting cavity 45. In this embodiment, the second abutment portion 84 is disposed rearward of the first abutment portion 441. Both ends of the second reset member 83 abut against the first abutment portion 441 and the second abutment portion 84, respectively. The second reset member 83 biases the operating member 81 toward its initial position. When the operating member 81 is in its initial position, the movable portion 4 is fixed relative to the fixed base 3.

[0098] The positioning principle of the impact shield 2 according to the second embodiment of the present disclosure is as follows.

[0099] When the lock pin 78 is disposed in the locked position where it is inserted into and engaged with the positioning hole 352, the movable part 4 is fixed to the fixed base 3. When the position of the movable part 4 needs to be adjusted, a certain external force is applied to the handle portion 812, which causes the operating member 81 to move in the F2 direction, causing the drive posts 82 at both ends of the drive part 813 to move along the third strip-shaped hole 811 and approach each other. As a result, the lock pins 78 on both sides of the movable part 4 are driven to move from the locked position to the unlocked position, i.e., the lock pins 78 are disengaged from the positioning hole 352. At this time, the movable part 4 can be moved to an appropriate position by rotating the drive rod 65. Next, the external force applied to the handle portion 812 is removed, and the operating portion 81 moves in the reverse direction of F2 under the action of the second reset member 83, causing the drive posts 82 at both ends of the drive portion 813 to move away from each other along the third strip-shaped hole 811, thereby driving the lock pins 78 on both sides of the movable portion 4 to move from the unlocked position to the locked position.

[0100] The safety seat and its impact shield 2 according to the present disclosure have at least the following technical effects.

[0101] In the impact shield 2, the adjustment mechanism 5 can adjust not only the horizontal distance between the movable part 4 and the backrest 12, but also the vertical distance between the movable part 4 and the seat surface, so that the safety seat has an adjustable seating space, which can better meet the seating requirements of children of different body sizes and is convenient for children to use.

[0102] The technical features of the above-described embodiments can be combined in any manner. For the sake of brevity, the embodiments do not necessarily describe all possible combinations of technical features. However, as long as there is no contradiction in the combination of these technical features, the combination should be considered within the scope of the present disclosure.

[0103] The above-described embodiments are merely some implementation forms of the present disclosure, and the descriptions are relatively specific and detailed, but should not be construed as limiting the scope of the present disclosure. It should be understood by those skilled in the art that various modifications and improvements can be made without departing from the concept of the present disclosure, and all of these modifications and improvements fall within the scope of protection of the present disclosure. Therefore, the patent protection of the present disclosure is defined by the appended claims. [Explanation of symbols]

[0104] 1 seat body 2 Impact Shield 3 Fixed base 4 Moving parts 5 Adjustment mechanism 6 Drive Unit 7 Lock Unit 8 Operation Unit 9 Rotation Axis 11 Seat surface 12 Backrest 13 Armrest 14 Engagement groove 31 Fixing hole 32 First Restriction 34 Containment cavity 35 First Housing 36 Second Housing 41 First Belt Hole 42 racks 43 First Base 44 Second Base 45 Second Mounting Cavity 61 Rotating shaft 62 gears 65 Drive rod 66 Second pin shaft 67 Third pin shaft 71 Locking member 72 first reset member 73 First pin shaft 75 Driving member 76 Drive rope 78 Lock pin 81 Operating member 82 Drive Post 83 Second reset member 84 Second abutment part 311 second engagement portion 313 Interior wall 351 Raised area 352 Positioning hole 361 First Groove 362 Second Groove 411 First End 412 Second End 431 Operation groove 441 First abutment part 611 Mounting cavity 711 first engagement portion 712 Operation part 713 Second Restriction 714 Storage groove 716 Outer surface 751 mounting holes 752 First driving part 753 Second driving part 761 Engagement member 811 Third Belt Hole 812 Handle 813 Drive unit 3611 First groove wall 3612 Second groove wall 7111 Rounded edges 7521 First engagement groove 7531 Second engagement groove D1 First movement direction D2 Second movement direction h2 Second band hole

Claims

1. 1. An impact shield applicable to a safety seat, comprising: a fixed base adapted to be connected to a seat body of the safety seat; a movable part movably connected to the fixed base; an adjustment mechanism disposed between the fixed base and the movable part, the adjustment mechanism being configured to adjust the position of the movable part relative to the fixed base; Equipped with an impact shield.

2. The adjustment mechanism includes: a drive unit movably connected to the movable part; 2. The impact shield of claim 1, wherein the drive unit is rotatably connected to the fixed base to drive the movable part to move, and the rotation axis of the drive unit intersects with the direction of movement of the movable part.

3. The impact shield of claim 2 , wherein the axis of rotation of the drive unit is perpendicular to the direction of movement of the movable part.

4. The adjustment mechanism includes: a drive unit extending through the movable portion and including a rotating shaft and a gear; 4. An impact shield as claimed in any one of claims 1 to 3, wherein the gear is fastened to the rotating shaft and arranged coaxially with the rotating shaft, the movable part comprises a rack configured to engage with the gear, and the drive unit is configured to be rotatably connected to the fixed base, whereby when the drive unit rotates, the movable part is driven to move relative to the fixed base by the engagement between the gear and the rack.

5. 5. The impact shield of claim 4, wherein the movable portion comprises a first band hole, the rack is disposed on a hole wall of the first band hole, and the first band hole is configured to allow the gear to rotate within the first band hole.

6. 6. The impact shield according to claim 4 or 5, wherein the racks are arranged along an arcuate line or a straight line.

7. the adjustment mechanism comprises a locking unit including a locking member, the locking member engaged with the rotating shaft to rotate synchronously therewith, the locking member slidable relative to the rotating shaft along a rotation axis of the drive unit, the locking member configured to be operable to be selectively disposed in a locked position or an unlocked position along a sliding path; 7. The impact shield of claim 4, wherein the locking member is restricted from rotating when disposed in the locked position, and is allowed to rotate to drive the rotating shaft to rotate synchronously when disposed in the unlocked position.

8. the adjustment mechanism comprises a locking unit including a locking member, the locking member engaged with the rotating shaft to rotate synchronously therewith, the locking member slidable relative to the rotating shaft along a rotation axis of the drive unit, the locking member configured to be operable to be selectively disposed in a locked position or an unlocked position along a sliding path; the locking member includes a first engagement portion, and the fixed base includes a second engagement portion adapted to engage with the first engagement portion; 8. The impact shield of claim 4, wherein when the locking member is disposed in the locked position, the first engagement portion engages with the second engagement portion, and when the locking member is disposed in the unlocked position, the first engagement portion disengages from the second engagement portion.

9. the fixed base includes a first limiting portion, and the locking member includes a second limiting portion; 9. The impact shield of claim 8, wherein the second limiting portion is configured to cooperate with the first limiting portion to limit a sliding distance of the locking member relative to the movable portion in a direction away from the movable portion.

10. the adjustment mechanism includes a lock unit including a lock member; the fixed base includes a fixing hole extending through the fixed base, at least a portion of the locking member is received in the fixing hole, and one end of the rotating shaft extends into the fixing hole and engages with the locking member; 10. The impact shield of claim 4, wherein the locking member comprises an engagement tooth, and an inner wall of the fastening hole comprises an engagement groove configured to engage the engagement tooth.

11. 11. The impact shield of claim 10, wherein the locking member has an annular outer circumferential surface, the engagement teeth are disposed on the outer circumferential surface, and the engagement teeth have rounded edges on both circumferential sides of the outer circumferential surface.

12. the adjustment mechanism includes a lock unit having a lock member, the lock member having an annular outer peripheral surface; 12. The impact shield according to claim 4, wherein a plurality of engagement teeth are equally spaced on the outer peripheral surface, and a plurality of engagement grooves are equally spaced on the inner wall of the fixing hole, and each of the plurality of engagement teeth is configured to engage with one of the plurality of engagement grooves.

13. the adjustment mechanism includes a lock unit including a lock member; the fixed base includes a fixing hole extending through the fixed base, at least a portion of the locking member is received in the fixing hole, and one end of the rotating shaft extends into the fixing hole and engages with the locking member; 13. The impact shield of claim 4, wherein at least a portion of the locking member is shaped as a regular polygonal prism, and at least a portion of an inner wall of the fixing hole defines a regular polygonal hole that aligns with the regular polygonal prism.

14. 14. The impact shield of claim 4, wherein the fixed base includes a fixing hole extending therethrough, the adjustment mechanism includes a locking unit including a locking member, the locking member being disposed on a first side of the fixed base remote from the movable part and positioned outside the fixing hole, one end of the rotating shaft extending through the fixing hole and engaging with the locking member, the locking member being configured to abut or snap into the first side for locking when disposed in the locked position.

15. An engagement groove, an end surface tooth, or an engagement hole is disposed on the first side surface; 15. The impact shield of claim 14, wherein the engagement groove, the end surface tooth, or the engagement tooth that aligns with the engagement hole, a further end surface tooth, or a pin shaft is disposed on a side of the locking member opposite the first side.

16. the adjustment mechanism comprises a locking unit including a locking member, the locking member engaged with the rotating shaft to rotate synchronously therewith, the locking member slidable relative to the rotating shaft along a rotation axis of the drive unit, the locking member configured to be operable to be selectively disposed in a locked position or an unlocked position along a sliding path; 16. The impact shield of claim 4, wherein the locking unit further comprises a first reset member disposed between the fixed base and the locking member or between the movable part and the locking member, the first reset member configured to bias the locking member toward the locked position.

17. the adjustment mechanism comprises a lock unit including a lock member, a first pin shaft, and a drive member fixedly connected to the lock member, the lock member engaged with the rotating shaft to rotate synchronously with the rotating shaft, the lock member being slidable relative to the rotating shaft along a rotation axis of the drive unit; 17. An impact shield according to any one of claims 4 to 16, wherein one of the rotating shaft and the drive member includes a second band hole, and the other of the rotating shaft and the drive member is fixedly connected to the first pin shaft, the first pin shaft being inserted into the second band hole and movable along the second band hole.

18. 18. The impact shield according to claim 17, wherein the drive member has a mounting hole arranged in the axial direction of the rotating shaft, and one end of the rotating shaft is inserted into the mounting hole and is movable in the extension direction of the mounting hole.

19. the adjustment mechanism includes a lock unit including a lock member; the fixed base includes a fixing hole extending through the fixed base, at least a portion of the locking member is received in the fixing hole, and one end of the rotating shaft extends into the fixing hole and is movably connected to the locking member; 19. An impact shield according to any one of claims 4 to 18, wherein an end of the locking member remote from the movable portion comprises an operating portion, at least a part of the operating portion extending from the fixing hole.

20. the impact shield comprises two fixed bases disposed on either side of the movable part, 20. An impact shield according to any one of claims 4 to 19, wherein two ends of the rotating shaft are rotatably connected to the two fixed bases on either side of the movable part, respectively.

21. the adjustment mechanism includes a locking unit, the locking unit includes a locking member and a drive rope, and the locking member is movably connected to the rotating shaft; Both sides of the movable part are provided with the fixed base and the lock unit; 21. An impact shield according to any one of claims 4 to 20, wherein two ends of the drive rope are respectively connected to the locking members on either side of the movable part, whereby the locking members on either side of the movable part are synchronously switchable between a locked position and an unlocked position.

22. the drive member comprises a first drive portion and a second drive portion; 22. The impact shield of claim 21, wherein for the locking unit located on one of the sides of the movable part, one of the two ends of the drive rope is connected to the first drive part of the drive member on the one of the sides of the movable part, and the other of the two ends of the drive rope is connected to the second drive part of the drive member on the other of the sides of the movable part.

23. the drive member includes a mounting hole, a first drive portion disposed outside the mounting hole, and a second drive portion disposed within the mounting hole; one end of the rotatable shaft is inserted into the mounting hole, the rotatable shaft having a first mounting cavity extending therethrough; the drive rope extends through the first mounting cavity and the mounting hole; 23. An impact shield according to claim 21 or 22, wherein one of the two ends of the drive rope is connected to the first drive portion of the drive member on one of the sides of the movable part, and the other of the two ends of the drive rope is connected to the second drive portion of the drive member on the other of the sides of the movable part.

24. 24. An impact shield according to any one of claims 2 to 23, wherein the drive unit comprises at least one drive rod pivotally connected to the movable part and the fixed base.

25. 25. The impact shield of claim 24, wherein the drive unit comprises two drive rods, each of the two drive rods pivotally connected to the movable part and the fixed base.

26. the drive unit further comprises a second pin shaft; the fixed base includes a first housing and a second housing, the second housing faces the movable part, the first housing and the second housing enclose an accommodating cavity, the second housing includes a first groove, and the at least one drive rod is disposed in the accommodating cavity; 26. An impact shield according to claim 24 or 25, wherein one end of the second pin shaft is fastened to the movable part and another end of the second pin shaft is pivotally connected to the drive rod through the first groove.

27. 27. The impact shield of claim 26, wherein the first groove has a first groove wall and a second groove wall, and the second pin shaft is movable along the first groove and abuts the first groove wall or the second groove wall to limit a range of rotation of the drive rod.

28. the adjustment mechanism includes a lock unit slidably disposed on the movable part and including a lock pin having a locked position and an unlocked position; the fixed base has a plurality of positioning holes; 28. The impact shield of claim 24, wherein the locking pin is inserted into one of the positioning holes when disposed in the locked position, and is disengaged from the positioning hole when disposed in the unlocked position.

29. the fixed base includes a first housing and a second housing, the second housing faces the movable part, and the first housing and the second housing enclose an accommodating cavity; the receiving cavity includes a raised portion, and the plurality of positioning holes are disposed on the raised portion and extend in a direction parallel to the lock pin; 29. The impact shield of claim 28, wherein the second housing includes a second groove, and the locking pin is inserted through the second groove into one of the plurality of positioning holes when disposed in the locked position.

30. the adjustment mechanism further includes a lock unit and an operation unit connected to the lock unit; 30. An impact shield according to any one of claims 24 to 29, wherein the operating unit is operable to drive the locking unit to selectively restrict or allow movement of the movable part relative to the fixed base.

31. The adjustment mechanism further includes a lock unit and an operation unit, an operating member movably disposed on the movable portion; a drive post slidably connected to the operating member and fixedly connected to the locking pin; Equipped with 31. An impact shield according to any one of claims 24 to 30, wherein the operating member is operable to drive the drive post into movement.

32. the operating member includes a third strip-shaped hole extending in a direction intersecting the moving direction of the operating member, 32. The impact shield of claim 31, wherein the drive post is inserted into the third webbing hole and is movable along the third webbing hole.

33. the operation unit further includes a second reset member disposed between the movable part and the operation member, 33. An impact shield according to claim 31 or 32, wherein the second reset member is configured to bias the operating member towards an initial position of the operating member in which the movable part is fixed relative to the fixed base.

34. 34. An impact shield as claimed in any one of claims 1 to 33, wherein the movable part is movable relative to the fixed base along a path of movement defined by a first position and a second position higher than the first position, the path of movement being curved.

35. 35. An impact shield according to any one of claims 1 to 34, wherein the adjustment mechanism comprises a locking unit configured to selectively limit or allow movement of the movable part relative to the fixed base.

36. A safety seat, The seat body, The impact shield of any one of claims 1 to 35; Equipped with A safety seat, wherein the impact shield is connected to the seat body through the fixed base.

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