An anti-rotation limiting device for a child safety seat during side impact

Abstract

The present invention discloses an anti-rotation restriction device for a child safety seat in the event of a side impact. The device is arranged on a side panel of the child safety seat backrest. When the car loses control, the relative rotation between the safety seat and the car seat is hindered by a restriction structure that can be opened outwards and whose extension length can be adjusted, and the locked state of the restriction structure when opened has higher firmness. The key points of the technical solution are: it includes a base plate, a rotation limit block connected to the base plate in a flip manner, and a pop-up control mechanism. The pop-up control mechanism controls the lateral pop-up and retraction of the rotation limit block. The base plate is provided with a receiving groove for the rotation limit block to be retracted and embedded. The rotation limit block is also provided with an extension block. The rotation limit block is provided with a telescopic channel. The extension block is slidably embedded in the telescopic channel. The extension block extends outward from the telescopic channel to increase the extension length of the rotation limit block. A telescopic control structure is provided between the rotation limit block and the extension block.

Description

Technical Field

[0001] The present invention relates to the technical field of child car safety seats, in particular to an anti-rotation restriction device for a child safety seat during a side impact. Background Art

[0002] Installing a child safety seat in a car effectively ensures the safety of children while riding. Child safety seats provide excellent restraint and support for children. In the event of an accident, such as a collision or rollover, they effectively prevent children from falling out of the seat, thus preventing violent collisions between the child and the vehicle, and mitigating injuries to children in the event of an accident. Currently, child safety seats are highly popular. With the advancement of technology, the comfort and safety of child safety seats have gradually improved, and their functionality has become more comprehensive and advanced.

[0003] Currently, most advanced child safety seats feature 360-degree rotation. This is primarily designed to accommodate forward-facing seating, which is the most common seating arrangement. Reverse-facing seating is recommended for younger children (generally under four years old). This allows the head and shoulders to be supported by the seat back in the event of a head-on collision, dispersing the impact force over a wide area to provide better protection. Therefore, these safety seats can switch between forward-facing and reverse-facing seating positions based on actual usage scenarios, ensuring safety while offering greater ease of use. However, in the event of a side collision or an uncontrolled spin, the safety seat may rotate violently relative to the seat, potentially injuring the child. Therefore, limiting the safety seat's ability to flip in these situations has become a key concern in the field.

[0004] A Chinese invention patent application published on September 20, 2019, discloses a child safety seat (publication number: CN110254303A). The patent application includes a seat body and a side impact protection device. The side impact protection device is located on the side of the seat body and can be opened and closed. However, when the safety seat is installed in different cars, the distance between the side of the safety seat and the car seat backrest may vary. Therefore, when the safety seat flips over, the distance between the side of the safety seat and the seat backrest of different cars will also vary. If the support body is short, it may not be able to support the car seat backrest, resulting in failure to limit flipping. If the support body is designed to be long, it will take up a large space and interfere with neighboring passengers in daily practical scenarios. In addition, the solution adopted by the patent is to make the support body open parallel to the rotation direction of the seat. This may have a hidden defect in the stability of the support body after opening. That is, in the event of a violent collision, the locking of the support body is destroyed, resulting in the loss of the rotation restriction effect.

[0005] Therefore, how to provide a flip-limiting effect while achieving a higher stability of the limiting structure has become an urgent problem to be solved in this field. Summary of the Invention

[0006] The present invention proposes an anti-rotation restriction device for a child safety seat in the event of a side impact. When the car loses control, the relative rotation between the safety seat and the car seat is hindered by a restriction structure that can be opened outward and the extension length can be adjusted, and the locked state of the opened restriction structure has higher firmness.

[0007] In order to achieve the above-mentioned object of the invention, the present invention adopts the following technical solutions:

[0008] A child safety seat anti-rotation restriction device for side impact, wherein the flip restriction device is arranged on the side panel of the child safety seat backrest, and includes a base plate, a rotation limit block connected to the base plate in a flip manner, and a pop-up control mechanism, the pop-up control mechanism controls the lateral pop-up and retraction of the rotation limit block, the base plate is provided with a receiving groove for the rotation limit block to be retracted and embedded; the rotation limit block is also provided with an extension block, the rotation limit block is provided with a telescopic channel, the extension block is slidably embedded in the telescopic channel, the extension block extends outward from the telescopic channel to increase the extension length of the rotation limit block, and a telescopic control structure is provided between the rotation limit block and the extension block.

[0009] Compared with the prior art, the anti-rotation restriction device for a child safety seat in a side impact adopting the above technical solution has the following beneficial effects:

[0010] The sideways-opening rotation limit block can press against the car seat backrest when the child safety seat flips over, so as to prevent the child safety seat from further flipping over and reduce harm to the child in the seat; and the rotation limit block is provided with an extension block that can continue to extend outward. When the child safety seat is far away from the car seat backrest, the extension block can be pulled out to extend the length of the rotation limit block to ensure that the rotation limit block can press against the car seat backrest. When the child safety seat is close to the car seat backrest, the extension block can be retracted into the rotation limit block to reduce interference to nearby passengers.

[0011] Preferably, the telescopic control structure includes a push-pull control block, the telescopic channel forms a notch on the surface of the limit block for the extension block, the extension block is provided with a push-pull groove, the push-pull control block is slidably embedded in the push-pull groove, and an elastic reset member is provided between the push-pull control block and the extension block; the side wall of the extension block is provided with a spring plate and a through groove providing a movable space for the spring plate, and the limit block is provided with a plurality of tooth grooves on the side wall of the telescopic channel, and the spring plate is provided with a convex tooth facing the tooth groove side, and the convex tooth can be embedded in the tooth groove; when the push-pull control block is in a fully reset state due to the elastic action of the elastic reset member, the push-pull control block presses against the spring plate on the inner side of the push-pull groove, so that the convex tooth cannot be retracted into the through groove, and at this time the extension block is locked in the telescopic channel; pulling the push-pull control block causes the spring plate and the push-pull control block to be relatively staggered, and the spring plate loses the obstruction of the push-pull control block in the direction toward the push-pull groove, and the convex tooth can be retracted into the through groove to disengage from the tooth groove, so that the extension block can slide in the telescopic channel.

[0012] Preferably, the pop-up control mechanism includes a release button, a pop-up shaft structure and a locking structure for maintaining the rotation limit block in a fully pop-up state, and the rotation limit block establishes a flip connection relationship with the substrate through the pop-up shaft structure, wherein the release button includes a fixedly connected finger dial plate and a card block, the release button is relatively movably connected to the substrate, and the side of the rotation limit block facing the release button is provided with a card slot for the card block to be embedded, and a reset spring I is arranged between the release button and the substrate, and the reset spring I drives the card block to automatically pop into the card slot, and the card block can be disengaged from the card slot by shifting the dial plate; the pop-up shaft structure includes an axle seat, an axle rod and a pop-up elastic member, the axle seat is fixedly connected to the substrate, the axle rod is fixedly connected to the rotation limit block, the axle rod is rotatably arranged in the axle seat, and the pop-up elastic member provides the rotation limit block with a tendency to automatically rotate around the axis, and the automatic rotation direction of the rotation limit block is the pop-up direction toward the outside of the substrate.

[0013] Preferably, the locking structure includes a movable locking plate, which is relatively slidably connected to the rotation limit block, and a reset spring II is arranged between the movable locking plate and the rotation limit block; the substrate is provided with an arcuate groove toward the movable locking plate, the inner wall of the arcuate groove is provided with a clamping hole, the arcuate groove is coaxial with the shaft rod, and the end of the movable locking plate facing the arcuate groove is provided with a locking tongue, the locking tongue rests on the inner wall of the arcuate groove as the rotation limit block flips, and the locking tongue is embedded in the clamping hole when the rotation limit block pops out to the end state.

[0014] Preferably, the movable locking piece is provided with a sliding sleeve hole, the limiting block is fixed with a limiting sleeve rod, the limiting sleeve rod is sleeved in the sliding sleeve hole, the side wall of the limiting sleeve rod is provided with a first convex portion, and the end side wall of the sliding sleeve hole facing the first convex portion is provided with a second convex portion, and the two ends of the reset spring II are respectively sleeved on the first convex portion and the second convex portion.

[0015] Preferably, both side walls of the protruding block are provided with anti-elasticity blocks, and the anti-elasticity blocks form a slope on the side wall facing the push-pull groove, and the top of the slope exceeds the inner wall of the protruding block and extends into the push-pull groove; both side walls of the push-pull control block are provided with straight slots, and when the push-pull control block is embedded in the push-pull groove, the anti-elasticity blocks on both sides respectively bounce into the straight slots on both sides.

[0016] Preferably, the rotation limit block is provided with a flip limiting block at the connection end with the substrate, and the substrate is provided with a yielding flip groove corresponding to the flip limiting block, and the yielding flip groove forms a blocking surface at the bottom, and the flip limiting block falls on the blocking surface when the rotation limit block is completely popped out.

[0017] Preferably, the side of the rotation limiting block facing the base plate in the flipping direction is used as the inner side surface, and the rotation limiting block is provided with notches communicating with the telescopic channel on both the inner side surface and the outer end portion. The extending block is provided with a notch communicating with the push-pull channel on the side on the same side as the inner side surface, and the push-pull control block is provided with a hook groove on the side on the same side as the inner side surface; the inner side surface of the rotation limiting block is provided with a covering plate, and the covering plate has a notch to expose the hook groove.

[0018] In addition to the above technical solutions, the present invention also discloses the following technical solutions:

[0019] The movable locking piece is provided with an unlocking structure, and a linkage structure is provided between the unlocking structure and the telescopic control structure. The telescopic control structure controls the extension block to perform telescopic action while also driving the unlocking structure to move through the linkage structure, and then the unlocking structure drives the lock tongue to disengage from the card hole.

[0020] Preferably, the telescopic control structure includes a push-pull control block, the telescopic channel forms a notch on the surface of the rotation limit block for the extension block to extend, the bottom surface of the extension block is provided with a push-pull groove, the push-pull control block is slidably embedded in the push-pull groove, and an elastic reset member is provided between the push-pull control block and the extension block; the side wall of the extension block is provided with a spring plate and a through groove providing a movable space for the spring plate, the rotation limit block is provided with a plurality of tooth grooves on the side wall of the telescopic channel, the spring plate is provided with a convex tooth facing the side with the tooth groove, and the convex tooth can be embedded in the tooth groove; the unlocking structure is a follower rod fixedly connected to the movable locking plate, and a block is provided at the end of the follower rod, and the linkage structure includes a fixed plate and a push plate, and the fixed plate is relatively fixedly connected to the push-pull control block, extending The side wall of the block is also provided with a give way slot, and the push plate passes through the give way slot to connect the fixed plate, the push plate and the stop block abut each other, and the fixed plate drives the push plate to move synchronously to push the stop block, and then drives the lock tongue of the movable locking plate to disengage from the card hole. When the push-pull control block is in a fully reset state due to the elastic action of the elastic reset member, the push-pull control block abuts against the spring sheet on the inner side of the push-pull groove, so that the convex tooth cannot be retracted into the through groove, and the protruding block is locked in the telescopic channel at this time; pulling the push-pull control block causes the spring sheet and the push-pull control block to be relatively staggered, and the spring sheet loses the obstruction of the push-pull control block in the direction toward the push-pull groove, and the convex tooth can be retracted into the through groove to disengage from the tooth groove, so that the protruding block can slide in the telescopic channel.

[0021] The present invention also discloses an anti-rotation limiting device for a child safety seat in the event of a side impact. The flip limiting device is arranged on the side panel of the child safety seat backrest, and includes a base plate, a rotation limiting block flip-connected to the base plate, and a pop-up control mechanism. The pop-up control mechanism controls the outward opening and inward retraction of the rotation limiting block. The opening direction of the rotation limiting block is located in a vertical plane, and the base plate is provided with a receiving groove for the rotation limiting block to be retracted and embedded. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 Schematic diagram of the structure of embodiment 1 of the anti-rotation restriction device of a child safety seat during a side impact according to the present invention.

[0023] Figure 2 This is a schematic diagram of the installation structure of the rotation limiting block in Example 1.

[0024] Figure 3 This is a structural diagram of the rotation limiting block in Example 1 (bottom perspective).

[0025] Figure 4 Schematic diagram of the internal structure of the rotation limiting block in Example 1.

[0026] Figure 5 This is a structural diagram of the separation state of the rotation limiting block and the extending block in Example 1.

[0027] Figure 6 This is a structural diagram of the protruding block in Example 1.

[0028] Figure 7 This is a structural diagram of the push-pull control block in Example 1.

[0029] Figure 8 Schematic diagram of the structure of embodiment 2 of the anti-rotation restriction device of a child safety seat during a side impact according to the present invention.

[0030] Figure 9 This is a structural diagram of the push-pull control block when it is pulled outward in Example 2.

[0031] Figure 10 A schematic diagram of the structure of the button in Example 2

[0032] Figure numerals: 1, base plate; 10, receiving groove; 11, arc groove; 110, card hole; 12, give way flip groove; 120, blocking surface; 2, rotation limit block; 20, limit sleeve rod; 200, telescopic channel; 21, cover plate; 210, notch; 211, tooth groove; 212, hook; 22, extension block; 220, push-pull groove; 221, spring piece; 2210, convex tooth; 222, give way slide; 223, anti-elastic block; 2230, slope; 23, push-pull control block; 230, hook groove; 231, straight slot; 232, the first A through hole; 233, a second through hole; 234, a clamping spring; 2340, a guiding slope; 24, a bayonet; 25, a boss; 26, an elastic reset member; 3, a release button; 30, a finger dial; 31, a clamping block; 4, a pop-up shaft structure; 40, a shaft seat; 41, a shaft rod; 42, a tension spring; 5, a movable locking plate; 50, a locking tongue; 51, a sliding sleeve hole; 52, an unlocking structure; 520, a follower rod; 521, a block; 6, a linkage structure; 60, a fixed plate; 61, a push plate; 7, a flip limiting block; 8, a side plate; 9, a button. DETAILED DESCRIPTION

[0033] The present invention will be further described below with reference to the accompanying drawings.

[0034] Example 1:

[0035] like Figures 1 to 7 The rollover limiting device shown is arranged on the side panel 8 of the child safety seat backrest. The rollover limiting device includes a base plate 1, a rotation limit block 2 connected to the base plate 1 in a flip manner, and a pop-up control mechanism. The pop-up control mechanism controls the rotation limit block 2 to open toward the side of the child safety seat backrest and retract inward. The base plate 1 is provided with a receiving groove 10 for the rotation limit block 2 to be retracted and embedded. The opening direction of the rotation limit block 2 is located in a vertical plane, that is, the plane where the opening path of the rotation limit block 2 is located is perpendicular to the horizontal rotation plane of the child safety seat itself.

[0036] The pop-up control mechanism includes a release button 3, a pop-up shaft structure 4 and a locking structure for maintaining the rotation limit block 2 in a fully pop-up state. The rotation limit block 2 establishes a flip connection relationship with the base plate 1 through the pop-up shaft structure 4.

[0037] The release button 3 includes a fixedly connected finger dial plate 30 and a card block 31. The release button 3 is movably connected to the base plate 1. The side of the rotation limit block 2 facing the release button 3 is provided with a bayonet 24 for the card block 31 to be embedded. A return spring I is arranged between the release button 3 and the base plate 1. The return spring I drives the card block 31 to automatically bounce into the bayonet 24. The card block 31 can be disengaged from the bayonet 24 by toggling the dial plate.

[0038] The side of the rotation-limiting block 2 facing the base plate 1 in the flipping direction is used as the inner side surface. The inner side surface of the rotation-limiting block 2 is provided with a covering plate 21. The covering plate 21 is provided with a hook 212 extending outward at the middle of the inner end, and a corresponding hook ring is provided on the inner side of the base plate 1. The pop-up shaft structure 4 includes an axle seat 40, a shaft rod 41 and a pop-up elastic member. The pop-up elastic member is a tension spring 42. The axle seat 40 is fixedly set in the base plate 1. The shaft rod 41 is fixedly connected to the inner end of the rotation-limiting block 2. The shaft rod 41 passes through the inner wall of the receiving groove 10 and is rotated in the axle seat 40. There is space inside the base plate 1 for the tension spring 42 to stretch and move. One end of the tension spring 42 hooks the connecting hook 212, and the other end hooks the hook ring of the connecting hook 212. The tension spring 42 provides tension to the covering plate 21 and then provides the rotation-limiting block 2 with a tendency to automatically rotate around the axis. The automatic rotation direction of the rotation-limiting block 2 is the pop-up direction toward the outside of the base plate 1.

[0039] The locking structure includes a movable locking piece 5, which is provided with a sliding sleeve hole 51. The limiting block 2 is fixed with a limiting sleeve rod 20, which is sleeved in the sliding sleeve hole 51, and the movable locking piece 5 and the limiting block 2 can slide relative to each other. A reset spring II is arranged between the movable locking piece 5 and the limiting block 2. The side wall of the limiting sleeve rod 20 is provided with a first convex portion, and the end side wall of the sliding sleeve hole 51 facing the first convex portion is provided with a second convex portion. The two ends of the reset spring II are respectively sleeved on the first convex portion and the second convex portion. The end of the movable locking piece 5 away from the limiting sleeve rod 20 is provided with a lock tongue 50. A boss 25 is provided at the inner end portion of the rotation limit block 2. The above-mentioned locking structure and the limiting sleeve 20 are both located in the boss 25. A telescopic hole matching the lock tongue 50 is provided on the inner end surface of the boss 25. The base plate 1 is provided with an arc groove 11 facing the movable locking piece 5. The inner end surface of the boss 25 is an arc surface and fits the inner wall of the arc groove 11. A locking hole 110 is provided on the inner wall of the arc groove 11. The arc groove 11 is coaxial with the shaft rod 41. The lock tongue 50 extends from the telescopic hole due to the elastic action of the reset spring II and rests on the inner wall of the arc groove 11. When the rotation limit block 2 pops outward to the end state, the lock tongue 50 is embedded in the locking hole 110 so that the rotation limit block 2 is locked.

[0040] The inner end of the rotation limit block 2 is also provided with a flip limiting block 7, and the base plate 1 is provided with a give-way flip groove 12 corresponding to the flip limiting block 7. The two side surfaces of the flip limiting block 7 are respectively abutted against the inner walls of the give-way flip groove 12 on both sides, and the give-way flip groove 12 forms a blocking surface 120 at the bottom. The flip limiting block 7 falls on the blocking surface 120 when the rotation limit block 2 is fully popped out. The flip limiting block 7 plays a role in strengthening the locking state. When the rotation limit block 2 is subjected to a large lateral external force and an upward external force, the flip limiting block 7 prevents the rotation limit block 2 from being displaced, thereby protecting the locking of the rotation limit block 2 from being destroyed.

[0041] The rotation limiter 2 is also provided with an extension block 22. The rotation limiter 2 is provided with a telescopic channel 200. The rotation limiter 2 is provided with notches on both the inner side and the outer end thereof, which communicate with the telescopic channel 200. The extension block 22 is slidably embedded in the telescopic channel 200. The extension block 22 extends outward from the telescopic channel 200 through the notch at the end to increase the extension length of the rotation limiter 2. The laterally opened rotation limiter 2 can abut against the car seat backrest when the child safety seat flips over, thereby preventing the child safety seat from further flipping over and reducing harm to the child. The rotation limiter 2 is provided with an extension block 22 that can continue to extend outward. When the child safety seat is far away from the car seat backrest, the extension block 22 can be pulled out to extend the length of the rotation limiter 2, ensuring that the rotation limiter 2 can abut against the car seat backrest.

[0042] A telescopic control structure is provided between the rotation limit block 2 and the extension block 22. The telescopic control structure includes a push-pull control block 23. The inner side and outer end of the rotation limit block 2 are both provided with notches that communicate with the telescopic channel 200. The push-pull control block 23 can extend outward from the notch at the outer end of the rotation limit block 2. A push-pull groove 220 is provided on the bottom surface of the extension block 22. The push-pull control block 23 is slidably embedded in the push-pull groove 220. The extension block 22 is provided with a notch that communicates with the push-pull groove 220 on the same side as the inner side of the rotation limit block 2. The push-pull control block 23 is provided with a hook groove 230 on the same side as the inner side of the rotation limit block 2. The hook groove 230 can be used to hook a finger to pull the push-pull control block 23. The cover plate 21 has a notch 210 that exposes the hook groove 230. A finger extends into the hook groove 230 through the notch 210.

[0043] An elastic reset member 26 is provided between the push-pull control block 23 and the extending block 22. The elastic reset member 26 adopts a spring. A spring piece 221 and a through groove providing a movable space for the spring piece 221 are provided on the side wall of the telescopic channel 200 of the extending block 2. The spring piece 221 is provided with a convex tooth 2210 on the side facing the tooth groove 211. The convex tooth 2210 can be embedded in the tooth groove 211. The push-pull control block 23 slides toward the inner end of the push-pull groove 220 due to the elastic force of the elastic reset member 26 and is reset. When the push-pull control block 23 is in a fully reset state, the push-pull control block 23 presses against the spring piece 221 on the inner side of the push-pull groove 220, causing The convex tooth 2210 cannot be retracted into the through groove, and the convex tooth 2210 is stuck in the tooth groove 211. At this time, the protruding block 22 is locked in the telescopic channel 200; when the hook groove 230 is hooked with a finger and the push-pull control block 23 is pulled outward, the spring piece 221 and the push-pull control block 23 can be staggered relative to each other, and the spring piece 221 loses the obstruction of the push-pull control block 23 in the direction toward the push-pull groove 220. The convex tooth 2210 can be retracted into the through groove to disengage from the tooth groove 211, so that the protruding block 22 can slide in the telescopic channel 200. When the protruding block 22 is pulled to slide, the convex teeth 2210 of the spring piece 221 can be ejected into the arranged tooth grooves 211 in sequence, thereby playing the role of gear adjustment.

[0044] The movable locking piece 5 is also provided with an unlocking structure 52, and a linkage structure 6 is provided between the unlocking structure 52 and the telescopic control structure. By pulling the push-pull control block 23 to control the extension block 22 to perform a telescopic action, the unlocking structure 52 is driven to move through the linkage structure 6, and then the unlocking structure 52 drives the lock tongue 50 to disengage from the card hole 110.

[0045] The unlocking structure 52 is a follower rod 520 fixedly connected to the movable locking plate 5, and a stopper 521 is provided at the end of the follower rod 520. The linkage structure 6 is an integrated fixed plate 60 and a push plate 61. The fixed plate 60 is relatively fixedly connected to the push-pull control block 23. A clamping spring 234 for fixing the linkage structure 6 is provided inside the push-pull control block 23. The two opposite side walls of the push-pull control block 23 are respectively provided with a first through hole 232 and a second through hole 233. A fixed bayonet 24 is provided in the middle of the fixed plate 60. The push plate 61 passes through the first through hole 232 and the give way slot 222 in sequence and abuts against the stopper 521, and the clamping spring 234 is clamped. A guiding slope 2340 is set toward the second through hole 233. When the linkage structure 6 is inserted into the push-pull control block 23 from the second through hole 233 with the push plate 61 in front, the push plate 61 and the fixed plate 60 slide over the guiding slope 2340 in turn and continue to move forward until the top of the clamping spring 234 pops into the fixed bayonet 24 to complete the fixation of the linkage structure 6. The side wall of the protruding block 22 is also provided with a makeshift groove 222 for the push plate 61 to pass through and slide. The push plate 61 and the stop block 521 abut against each other, and the fixed plate 60 drives the push plate 61 to move synchronously to push the stop block 521, thereby driving the lock tongue 50 of the movable locking plate 5 to disengage from the clamping hole 110.

[0046] Anti-dropout blocks 223 are provided on both side walls of the protruding block 22. The anti-dropout blocks 223 form a slope 2230 on one side wall facing the push-pull groove 220. The top of the slope 2230 extends beyond the inner wall of the protruding block 22 and extends into the push-pull groove 220. Straight slots 231 are provided on both side walls of the push-pull control block 23. When the push-pull control block 23 is embedded in the push-pull groove 220, the anti-dropout blocks 223 on both sides respectively pop into the straight slots 231 on both sides.

[0047] Example 2:

[0048] like Figures 8 to 10 As shown, the technical contents of this embodiment are basically the same as those of Example 1. The technical differences between this embodiment and Example 1 are:

[0049] The release button 3 in Example 1 is replaced with a button 9 that adopts a press-controlled method. The button 9 adopts a structure that can automatically pop up and reset. A telescopic buckle is provided on the side wall of the receiving groove 10 corresponding to the position of the bayonet 24 of the rotation limit block 2. When the button 9 is in the pop-up reset state (not pressed), the telescopic buckle pops out from the inner wall of the receiving groove 10 and embeds into the bayonet 24; when the button 9 is pressed, the telescopic buckle disengages from the bayonet 24 and retracts into the receiving groove 10, and the rotation limit block 2 loses its lock and pops outward.

[0050] The technical solutions described above are preferred implementations of the present invention. A person skilled in the art may make several modifications and improvements without departing from the principles of the present invention, and these modifications and improvements shall also be considered within the scope of protection of the present invention.

Claims

1. A rollover restraint device for a child safety seat during a side impact, the rollover restraint device being provided on a side panel of a child safety seat backrest, characterized in that: The invention comprises a base plate (1), a rotation-limiting block (2) connected to the base plate (1) in a flipping manner, and an ejection control mechanism, wherein the ejection control mechanism controls the lateral ejection and retraction of the rotation-limiting block (2), and the base plate (1) is provided with a receiving groove (10) for the rotation-limiting block (2) to be retracted and embedded. The rotation limiting block (2) is further provided with a protruding block (22), the rotation limiting block (2) is provided with a telescopic channel (200), the protruding block (22) is slidably embedded in the telescopic channel (200), the protruding block (22) protrudes outward from the telescopic channel (200) to increase the extension length of the rotation limiting block (2), and a telescopic control structure is provided between the rotation limiting block (2) and the protruding block (22); The telescopic control structure comprises a push-pull control block (23); a telescopic channel (200) forms a notch on the surface of the rotation-limiting block (2) for the extension of the extension block (22); the extension block (22) is provided with a push-pull groove (220); the push-pull control block (23) is slidably embedded in the push-pull groove (220); an elastic reset member (26) is provided between the push-pull control block (23) and the extension block (22); a side wall of the extension block (22) is provided with a spring sheet (221) and a through groove providing a movable space for the spring sheet (221); the rotation-limiting block (2) is provided with a plurality of tooth grooves (211) on the side wall of the telescopic channel (200); the spring sheet (221) is provided with a convex tooth (2210) on the side facing the tooth groove (211); the convex tooth (2210) can be embedded in the tooth groove (211); When the push-pull control block (23) is in a fully reset state due to the elastic action of the elastic reset member (26), the push-pull control block (23) abuts against the elastic sheet (221) inside the push-pull channel (220), so that the protruding tooth (2210) cannot be retracted into the through groove, and the extending block (22) is locked in the telescopic channel (200); The push-pull control block (23) is pulled so that the spring piece (221) and the push-pull control block (23) are relatively staggered, and the spring piece (221) loses the obstruction of the push-pull control block (23) in the direction toward the push-pull channel (220), and the protruding tooth (2210) can be retracted into the through groove to disengage from the tooth groove (211), so that the protruding block (22) can slide in the telescopic channel (200).

2. The rollover restraint device according to claim 1, wherein: The pop-up control mechanism comprises a release button (3), a pop-up shaft structure (4) and a locking structure for maintaining the rotation-limiting block (2) in a fully pop-up state. The rotation-limiting block (2) establishes a flip connection relationship with the base plate (1) through the pop-up shaft structure (4). The release button (3) comprises a fixedly connected finger dial plate (30) and a card block (31). The release button (3) and the base plate (1) are relatively movably connected. A card slot (24) for the card block (31) to be embedded is provided on a side of the rotation-limiting block (2) facing the release button (3). A reset spring I is provided between the release button (3) and the base plate (1). The reset spring I drives the card block (31) to automatically pop into the card slot (24). The card block (31) can be separated from the card slot (24) by shifting the dial plate. The pop-up rotating shaft structure (4) comprises a shaft seat (40), a shaft rod (41) and a pop-up elastic member. The shaft seat (40) is fixedly connected to the base plate (1), the shaft rod (41) is fixedly connected to the rotation-limiting block (2), the shaft rod (41) is rotatably arranged in the shaft seat (40), and the pop-up elastic member provides the rotation-limiting block (2) with a tendency to automatically rotate around the axis. The automatic rotation direction of the rotation-limiting block (2) is the pop-up direction toward the outside of the base plate (1).

3. The rollover restraint device according to claim 2, wherein: The locking structure comprises a movable locking piece (5), the movable locking piece (5) is connected to the rotation limiting block (2) in a relatively sliding manner, and a reset spring II is arranged between the movable locking piece (5) and the rotation limiting block (2); a base plate (1) is provided with an arc surface groove (11) facing the movable locking piece (5), an inner wall of the arc surface groove (11) is provided with a clamping hole (110), the arc surface groove (11) and the shaft (41) are coaxial, and a locking tongue (50) is provided at the end of the movable locking piece (5) facing the arc surface groove (11), the locking tongue (50) abuts against the inner wall of the arc surface groove (11) as the rotation limiting block (2) flips, and the locking tongue (50) is embedded in the clamping hole (110) when the rotation limiting block (2) pops out to the end state.

4. The rollover restraint device according to claim 3, wherein: The movable locking piece (5) is provided with a sliding sleeve hole (51); the rotation limiting block (2) is fixedly provided with a limiting sleeve rod (20); the limiting sleeve rod (20) is sleeved in the sliding sleeve hole (51); a first convex portion is provided on a side wall of the limiting sleeve rod (20); a second convex portion is provided on an end side wall of the sliding sleeve hole (51) facing the first convex portion; and both ends of the reset spring II are sleeved on the first convex portion and the second convex portion respectively.

5. The rollover restraint device according to claim 3, characterized in that: The movable locking piece (5) is provided with an unlocking structure (52), and a linkage structure (6) is provided between the unlocking structure (52) and the telescopic control structure. The telescopic control structure controls the extension block (22) to perform a telescopic action and also drives the unlocking structure (52) to move through the linkage structure (6), and then the unlocking structure (52) drives the lock tongue (50) to disengage from the locking hole (110); The push-pull control block (23) is pulled so that the spring piece (221) and the push-pull control block (23) are relatively staggered, and the spring piece (221) loses the obstruction of the push-pull control block (23) in the direction toward the push-pull channel (220), and the protruding tooth (2210) can be retracted into the through groove to disengage from the tooth groove (211), so that the protruding block (22) can slide in the telescopic channel (200).

6. The rollover restraint device according to claim 1, wherein: Both side walls of the protruding block (22) are provided with anti-elasticity blocks (223), and the anti-elasticity blocks (223) form a slope (2230) on a side wall facing the push-pull groove (220), and the top of the slope (2230) exceeds the inner wall of the protruding block (22) and extends into the push-pull groove (220); both side walls of the push-pull control block (23) are provided with straight notches (231), and when the push-pull control block (23) is embedded in the push-pull groove (220), the anti-elasticity blocks (223) on both sides respectively bounce into the straight notches (231) on both sides.

7. The rollover restraint device according to claim 1, wherein: The rotation limiting block (2) is provided with a flip limiting block (7) at the connection end with the base plate (1); the base plate (1) is provided with a yielding flip groove (12) corresponding to the flip limiting block (7); the yielding flip groove (12) forms a blocking surface (120) at the bottom; the flip limiting block falls on the blocking surface (120) when the rotation limiting block (2) is fully ejected.

8. The rollover restraint device according to claim 1 or 6, characterized in that: The side of the rotation limiting block (2) facing the base plate in the flipping direction is used as the inner side surface. The rotation limiting block (2) is provided with notches communicating with the telescopic channel (200) on both the inner side surface and the outer end portion. The extending block (22) is provided with a notch communicating with the push-pull channel (220) on the side on the same side as the inner side surface. The push-pull control block (23) is provided with a hook groove (230) on the side on the same side as the inner side surface. The inner side surface of the rotation limiting block (2) is provided with a covering plate (21), and the covering plate (21) has a notch (210) for exposing the hook groove (230).

9. A child safety seat anti-rotation restriction device during a side impact, comprising the rollover restriction device according to any one of claims 1 to 8, wherein the rollover restriction device is provided on a side panel of the child safety seat backrest, and wherein: The invention comprises a base plate (1), a rotation-limiting block (2) connected to the base plate (1) in a flip manner, and a pop-up control mechanism. The pop-up control mechanism controls the rotation-limiting block (2) to open outward and retract inward. The opening direction of the rotation-limiting block (2) is located in a vertical plane. The base plate (1) is provided with a receiving groove (10) for the rotation-limiting block (2) to be retracted and embedded.

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