Occupant active safety protection devices, child safety seats, vehicle seats and vehicles

Abstract

The present disclosure relates to an active safety protection device for passengers, a child safety seat, a vehicle seat and a vehicle. The active safety protection device for passengers comprises: a safety seat headrest and a protective cover body, wherein the protective cover body is movably mounted on the safety seat headrest and has a highest position, a normal position and a blocking position in its movement trajectory; there is a gap in the vertical direction between the protective cover body at the highest position and the head of the passenger in the normal sitting position, which is convenient for the passenger to sit; after the passenger sits, the protective cover body moves to the normal position, and in the event of an emergency brake or a forward collision, the protective cover body can move from the normal position to the blocking position in time for safety protection, thereby improving the safety protection performance for the passenger.

Description

Technical Field

[0001] The present disclosure relates to the field of occupant safety protection, and in particular to an active occupant safety protection device, a child safety seat, a vehicle seat and a vehicle. Background Art

[0002] When a vehicle occupant is involved in an emergency brake, forward collision, or rearward collision, the torso of the occupant wearing a seat belt is restrained by the seat belt and achieves a smaller movement displacement. However, the occupant's head tilts forward or backward significantly relative to the torso due to the lack of proper restraint, which can easily cause neck injury. This is a serious safety threat, especially for infants and young children with fragile necks.

[0003] In some related technologies, the movement of the head and neck is limited by restraining the torso of the occupant with a seat belt and fixing the head and neck of the occupant with a fixed protective device. There are also methods of putting a headband or helmet on the occupant and setting a rope between the back of the headband or helmet and the seat to achieve forward movement restriction of the head during sudden braking or forward collision. However, this may easily cause discomfort to the occupant in terms of wearing comfort or free movement of the head and neck, resulting in the occupant's lack of willingness to wear protective devices. In other related technologies known to the inventors, by rotating the protective cover body connected to the seat, when sudden braking or forward collision occurs, the protective cover body quickly rotates forward from the normal position to the blocking position that limits the inertial swing range of the occupant's head under the action of inertia, thereby achieving active safety protection for the occupant's head and neck, reducing the restriction on the movement of the occupant's head and neck, and improving the occupant's comfort. Summary of the invention

[0004] The inventors have discovered that in the related art, the front edge of the protective cover body in the normal position will cause inconvenience for passengers to sit down. If the normal position is raised as a whole, although it will be convenient for passengers to sit down, the normal position will be too far from the blocking position. In the event of emergency braking or forward collision, there is a risk that the protective cover body cannot be rotated from the normal position to the blocking position in time for safety protection.

[0005] In view of this, the embodiments of the present disclosure provide an active safety protection device for occupants, a child safety seat, a vehicle seat and a vehicle, which can not only facilitate occupants to sit down, but also ensure that the protective cover body moves to the blocking position in time for safety protection during sudden braking or forward collision.

[0006] In one aspect of the present disclosure, there is provided an active safety protection device for passengers, which is used to actively protect passengers in a vehicle, and includes:

[0007] Safety seat head restraints, intended to be installed in vehicles; and

[0008] The protective cover body is movably mounted on the safety seat headrest and has a highest position, a normal position and a blocking position in its movement trajectory. There is a gap in the vertical direction between the protective cover body at the highest position and the head of the occupant in the normal sitting position; there is a gap between the protective cover body at the normal position and the head of the occupant in the normal sitting position, and part of the protective cover body is located above the head of the occupant; the protective cover body at the blocking position can limit the inertial swing range of the occupant's head;

[0009] The protective cover is configured to: move from the highest position to the normal position under the action of its own weight; and move from the normal position to the blocking position under the action of inertia when the forward acceleration of the vehicle is less than a preset negative threshold.

[0010] In some embodiments, the movement of the protective cover relative to the safety seat headrest is rotation or sliding.

[0011] In some embodiments, a buffer mechanism is further included to buffer the movement of the protective cover body from the highest position to the normal position.

[0012] In some embodiments, a sliding connection mechanism is further included, which is disposed between the protective cover body and the safety seat headrest and is used to achieve movement of the protective cover body relative to the safety seat headrest.

[0013] In some embodiments, the sliding connection mechanism includes a sliding frame having a sliding groove and a roller assembly arranged in the sliding groove. The sliding frame is fixedly mounted on the outer side of the safety seat headrest, and the roller assembly is rotatably connected to the end of the protective cover body located on the outer side of the safety seat headrest.

[0014] In some embodiments, the roller assembly includes at least two groups of rollers, each group of rollers includes two rollers respectively installed inside and outside the protective cover body, and the at least two groups of rollers are arranged at intervals along the sliding direction of the sliding groove.

[0015] In some embodiments, the sliding groove is an arc-shaped groove, and the sliding frame is provided with a long accommodating groove on the surface opposite to the protective cover body for the protective cover body to be embedded and rotated.

[0016] In some embodiments, it also includes a pin assembly arranged in the sliding groove, the pin assembly includes a pin base fixedly mounted on the protective cover body, and a pin and a spring installed in the pin base, the first end of the pin is tightened by the spring, and the second end abuts against the groove surface of the sliding groove, and a first protrusion is provided on the groove surface, which is used to lock the second end of the pin when the forward acceleration of the vehicle is not less than a preset negative threshold value, so as to limit the protective cover body to a normal position and stop it.

[0017] In some embodiments, the second end of the bayonet has a chamfer, and the first protrusion is a trapezoidal protrusion.

[0018] In some embodiments, the bayonet assembly further includes an adjusting bolt disposed between the bayonet and the spring for adjusting the preload force of the spring, wherein a first end of the adjusting bolt is tightened by the spring, and a second end is threadedly connected to the bayonet.

[0019] In some embodiments, the bayonet assembly further includes a positioning pin, the bayonet is provided with a travel slot extending along its telescopic direction, the bayonet base is provided with a positioning pin hole, and the positioning pin penetrates into the positioning pin hole and the travel slot to limit the circumferential rotation of the bayonet.

[0020] In some embodiments, there are multiple positioning pin holes and they are distributed along the circumference and / or axial direction of the bayonet.

[0021] In some embodiments, a plurality of second protrusions are provided on the groove surface for abutting against the bayonet to cushion the movement of the protective cover body from the highest position to the normal position. The plurality of second protrusions are arranged at intervals in the sliding direction, and the protrusion height of the second protrusions is lower than the protrusion height of the first protrusions.

[0022] In some embodiments, the second end of the bayonet has a chamfer, and the second protrusion is a trapezoidal protrusion.

[0023] In some embodiments, it also includes a backrest and a first safety strap in a herringbone shape, the backrest is used to insert the safety seat headrest on the seat of a vehicle, the sliding connection mechanism includes a pair of sliding frames fixed on both sides of the safety seat headrest, and the first safety strap has a first end for connecting to the vehicle, and a pair of second ends respectively fixedly connected to the pair of sliding frames.

[0024] In some embodiments, it also includes a backrest and a second safety strap, the backrest is used to insert the safety seat headrest on the seat of the vehicle, the first end of the second safety strap is used to connect to the vehicle, and the second end is connected to the rear side of the safety seat headrest.

[0025] In some embodiments, it further includes a cover made of energy absorbing material, the sliding connection mechanism includes a pair of sliding frames fixed on both sides of the safety seat headrest, and the cover wraps the sliding frames.

[0026] In some embodiments, a channel extending forward is provided on the top of the protective cover body, and an inertial body is provided in the channel. The inertial body is in sliding or rolling contact with the channel and is configured to slide or roll relative to the channel under the action of inertia and drive the protective cover body to move to a blocking position.

[0027] In some embodiments, the inertial body includes at least one spherical inertial body that can roll along the channel, and a receiving groove is provided at the bottom of the rear side of the channel for maintaining the spherical inertial body in a stationary state in the channel when the protective cover is in a normal position.

[0028] In one aspect of the present disclosure, a child safety seat is provided, comprising the aforementioned active safety protection device for an occupant.

[0029] In one aspect of the present disclosure, a vehicle seat is provided, comprising the aforementioned active safety protection device for an occupant.

[0030] In one aspect of the present disclosure, a vehicle is provided, comprising the aforementioned active safety protection device for an occupant, the aforementioned child safety seat, or the aforementioned vehicle seat.

[0031] Therefore, according to the embodiment of the present disclosure, the protective cover body has a highest position, a normal position and a blocking position in its movement trajectory. There is a gap in the vertical direction between the protective cover body in the highest position and the head of the occupant in the normal sitting position, which is convenient for the occupant to sit down. After the occupant sits down, the protective cover body moves to the normal position. In the event of emergency braking or forward collision, the protective cover body can move from the normal position to the blocking position in time for safety protection, thereby improving the safety protection performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] The accompanying drawings, which constitute a part of the specification, illustrate embodiments of the present disclosure and, together with the description, serve to explain the principles of the present disclosure.

[0033] The present disclosure may be more clearly understood from the following detailed description with reference to the accompanying drawings, in which:

[0034] Figure 1 is a schematic diagram of the installation structure of some embodiments of the active safety protection device for occupants disclosed in the present invention;

[0035] Figure 2 , Figure 3 and Figure 4 They are schematic diagrams of the protective cover body 200 in the highest position 200A, the normal position 200B and the blocking position 200C in some embodiments of the active safety protection device for occupants disclosed herein;

[0036] Figure 5 is a schematic structural diagram of a sliding frame 300 in some embodiments of the active safety protection device for occupants disclosed herein;

[0037] Figure 6 is a schematic structural diagram of a sliding connection mechanism in some embodiments of the active safety protection device for occupants disclosed herein;

[0038] Figure 7 is a schematic structural diagram of a protective cover body 200 in some embodiments of the active safety protection device for occupants disclosed herein;

[0039] Figure 8 is a schematic diagram of the internal structure of a latch assembly 400 in some embodiments of the active occupant safety protection device disclosed herein;

[0040] Fig. 9 yes Figure 8 A schematic diagram of the structure of the adjusting bolt 403 in the embodiment;

[0041] Fig.10 yes Figure 8 A schematic diagram of the structure of the locking pin 402 and the spring 404 in the embodiment;

[0042] Fig.11 is a schematic diagram of the external structure of the latch assembly 400 in some embodiments of the active occupant safety protection device disclosed herein;

[0043] Fig.12 , Fig.13 and Fig.14 They are schematic diagrams of the latch assembly 400 when the protection cover body 200 is at the highest position 200A, the normal position 200B and the blocking position 200C in some embodiments of the active safety protection device for occupants disclosed herein;

[0044] Fig.15 is a schematic structural diagram of a first safety belt in some embodiments of the active safety protection device for occupants disclosed herein;

[0045] Fig.16 is a schematic structural diagram of a second safety belt in some other embodiments of the active safety protection device for occupants disclosed herein;

[0046] Fig.17 is a schematic diagram of an inertial body 202 in some embodiments of the active safety protection device for occupants disclosed herein;

[0047] Fig.18 is a half-section view of some embodiments of the active safety protection device for occupants disclosed herein;

[0048] Fig.19 A schematic diagram of the skin 102 in some embodiments of the active occupant safety protection device disclosed herein.

[0049] Description of Reference Numerals

[0050] 100. Safety seat headrest; 101. Backrest; 102. Cover;

[0051] 200, protective cover; 200A, highest position; 200B, normal position; 200C, blocking position; 201, passage; 202, inertial body; 203, receiving slot;

[0052] 300, sliding frame; 301, roller assembly; 302, second protrusion; 303, first protrusion; 304, sliding groove; 305, accommodating long notch;

[0053] 400, bayonet assembly; 401, bayonet base; 402, bayonet; 403, adjusting bolt; 404, spring; 405, positioning pin; 406, travel slide; 407, positioning pin hole;

[0054] 500, first safety strap; 500', second safety strap. DETAILED DESCRIPTION

[0055] Various exemplary embodiments of the present disclosure will now be described in detail with reference to the accompanying drawings. The description of the exemplary embodiments is merely illustrative and is in no way intended to limit the present disclosure and its application or use. The present disclosure can be implemented in many different forms and is not limited to the embodiments described herein. These embodiments are provided to make the present disclosure thorough and complete and to fully express the scope of the present disclosure to those skilled in the art. It should be noted that unless otherwise specifically stated, the relative arrangement of the components and steps, the composition of the materials, the numerical expressions and the numerical values ​​set forth in these embodiments should be interpreted as being merely exemplary and not as limiting.

[0056] The words "first", "second" and similar words used in this disclosure do not indicate any order, quantity or importance, but are only used to distinguish different parts. The words "include" or "comprise" and similar words mean that the elements before the word include the elements listed after the word, and do not exclude the possibility of including other elements. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0057] In the present disclosure, when a specific device is described as being located between a first device and a second device, there may or may not be an intermediate device between the specific device and the first device or the second device. When a specific device is described as being connected to other devices, the specific device may be directly connected to the other device without an intermediate device, or may not be directly connected to the other device but have an intermediate device.

[0058] All terms (including technical terms or scientific terms) used in the present disclosure have the same meanings as those understood by ordinary technicians in the field to which the present disclosure belongs, unless otherwise specifically defined. It should also be understood that terms defined in general dictionaries, such as general dictionaries, should be interpreted as having meanings consistent with their meanings in the context of the relevant technology, and should not be interpreted in an idealized or extremely formal sense, unless explicitly defined herein.

[0059] Technologies, methods, and equipment known to ordinary technicians in the relevant art may not be discussed in detail, but where appropriate, the technologies, methods, and equipment should be considered as part of the specification.

[0060] like Figure 1 FIG. 1 is a schematic diagram of the installation structure of some embodiments of the active safety protection device for occupants according to the present disclosure. Figure 1 , and combined with reference Figures 2 to 19 In some embodiments, the occupant active safety protection device is used to actively protect the occupants of a vehicle, and includes a safety seat headrest 100 and a protective cover 200. The vehicle may be a family car or a commercial vehicle, a ship, a small or large aircraft, etc. The occupants may include adults or children, and may be the driver of the vehicle or a general passenger. The safety seat headrest 100 may be directly mounted on the body of the child safety seat, or may be directly mounted on the headrest position of the motor vehicle seat.

[0061] In the present disclosure, "front" refers to the direction the occupant faces after sitting down, and correspondingly, "rear" refers to the direction the occupant faces away from after sitting down, "left" refers to the direction where the occupant's left hand is located after sitting down, and "right" refers to the direction where the occupant's right hand is located after sitting down.

[0062] exist Figure 1 to Figure 4 In the embodiment shown, the occupant active safety protection device includes a safety seat headrest 100 and a protection cover 200. The safety seat headrest 100 is used to be installed on a vehicle; the protection cover 200 can be movably installed on the safety seat headrest 100, such as Figure 2 to Figure 4 As shown, in its motion trajectory, there are a highest position 200A, a normal position 200B and a blocking position 200C, as shown in FIG. Figure 2 As shown, there is a gap in the vertical direction between the protective cover body 200 at the highest position 200A and the head of the occupant in the normal sitting position; Figure 3 As shown, there is a gap between the protective cover body 200 in the normal position 200B and the head of the occupant in the normal sitting position, and part of the protective cover body 200 is located above the head of the occupant; Figure 4 As shown, the protective cover body 200 in the blocking position 200C can limit the inertial swing range of the occupant's head.

[0063] The highest position 200A of the protective cover body 200 refers to the highest position that the protective cover body 200 can reach relative to the safety seat headrest 100. Figure 2 As shown, when the protective cover body 200 is at the highest position 200A, there is a gap in the vertical direction between the protective cover body 200 and the head of the occupant in the normal sitting position. The occupant will not bump into the protective cover body 200 when sitting down, and sitting down is convenient.

[0064] The normal position 200B of the protective cover body 200 refers to the position of the protective cover body 200 when the forward acceleration of the vehicle is not less than the preset negative threshold, that is, the position of the vehicle when there is no sudden braking or forward collision during driving, wherein the preset negative threshold is a negative value, and its value can be determined according to the degree of influence of the acceleration value on the head and neck of the occupant. Figure 3 As shown, when the protective cover body 200 is in the normal position 200B, although the normal position 200B is lower than the highest position 200A, since the position of the occupant's head after sitting down is also lower than the occupant's head before sitting down, there is a gap between the occupant's head and the protective cover body 200 in the normal position and part of it is located above the occupant's head, which will not restrict the head of the occupant in the normal sitting position.

[0065] The blocking position 200C of the protective cover body 200 refers to the position where the protective cover body 200 can limit the inertial swing range of the occupant's head. Figure 4 As shown, the protective cover body 200 in the blocking position 200C limits the forward swing range of the occupant's head from the front of the occupant's head, so that the occupant's head can only swing to the inner lining of the protective cover body 200 under the action of inertia, thereby effectively absorbing the energy of the occupant's head sitting therein and limiting the forward displacement of the occupant's head, thereby protecting the occupant's head from injury and preventing whiplash injuries to the neck caused by excessive forward flexion of the head.

[0066] In order to enable the protective cover body 200 to move smoothly from the highest position 200A to the normal position 200B after the occupant takes his seat, the protective cover body 200 can be configured to move from the highest position 200A to the normal position 200B under the action of its own weight; in order to protect the occupant's head and neck by using the protective cover body 200 in the blocking position 200C, the protective cover body 200 can be configured to move from the normal position 200B to the blocking position 200C under the action of inertia when the forward acceleration of the vehicle is less than a preset negative threshold.

[0067] The movement of the protective cover body 200 relative to the safety seat headrest 100 can be rotation or sliding. The protective cover body 200 can be rotatably mounted on the safety seat headrest 100 via a rotating shaft structure, or can be rotatably or slidably mounted on the safety seat headrest 100 via a sliding connection structure. In some embodiments, the occupant active safety protection device further includes a sliding connection mechanism, which is disposed between the protective cover body 200 and the safety seat headrest 100, and is used to realize the movement of the protective cover body 200 relative to the safety seat headrest 100.

[0068] by Figures 5 to 8Taking the embodiment shown as an example, the sliding connection mechanism includes a sliding frame 300 provided with a sliding groove 304 and a roller assembly 301 arranged in the sliding groove 304. The sliding frame 300 is die-cast or wire-cut by hard rigid wear-resistant material. The sliding frame 300 is fixedly installed on the outer side of the safety seat headrest 100 and can be fixedly installed by riveting. The width of the sliding groove 304 is designed to accommodate the roller assembly 301 to slide smoothly in the sliding groove 304. The roller assembly 301 is rotatably connected to the end of the protective cover body 200 located on the outer side of the safety seat headrest 100. The sliding connection is multi-point force-bearing, which can prevent the structural strength risk of the rotating connection mechanism with a single rotating point force.

[0069] refer to Figure 6 to Figure 8 In some embodiments, the roller assembly 301 includes at least two groups of rollers, each group of rollers includes two rollers respectively mounted on the inner side and the outer side of the protective cover body 200, and at least two groups of rollers are arranged at intervals along the sliding direction of the sliding groove 304, thereby improving the reliability of the sliding connection. In order to ensure the sliding stability performance, in some embodiments, reference Figure 5 and Figure 6 As shown, the sliding groove 304 is an arc-shaped groove, and the sliding frame 300 is provided with a long accommodating notch 305 on the surface opposite to the protective cover body 200 for the protective cover body 200 to be inserted and rotated. In some other embodiments, the sliding groove 304 is an arc-shaped groove of other forms, and the movement of the protective cover body 200 relative to the safety seat headrest 100 is sliding.

[0070] As to how to keep the protective cover body 200 in the normal position 200B under normal conditions, in some embodiments, as Figure 6 to Figure 11 As shown, the occupant active safety protection device also includes a bayonet assembly 400 disposed in the sliding groove 304, the bayonet assembly 400 includes a bayonet base 401 fixedly mounted on the protective cover body 200, and a bayonet 402 and a spring 404 mounted in the bayonet base 401, the bayonet 402 is made of a hard wear-resistant material, and the bayonet base 401 has an accommodation space for the spring 404 to normally push against the bayonet 402 to expand and contract. Figure 8 and Fig.13 As shown, the first end of the latch 402 is tightened by a spring 404, and the second end abuts against the groove surface of the sliding groove 304. The groove surface is provided with a first protrusion 303, which is used to lock the second end of the latch 402 when the forward acceleration of the vehicle is not less than a preset negative threshold, so as to limit the protective cover body 200 to stop at the normal position 200B. The cooperation between the latch assembly and the protrusion is easy to implement and has high feasibility.

[0071] The preload force of the spring 404 determines the inertial motion threshold of the protective cover 200. When the vehicle brakes suddenly or collides forward during driving, the forward acceleration of the vehicle is less than the preset negative threshold. The protective cover 200 overcomes the elastic force of the spring 404 on the latch 402 under the action of inertia, and the latch 402 retracts, thereby disengaging from the first protrusion 303. Fig.14 As shown, the protective cover body 200 moves to a blocking position 200C capable of limiting the inertial swing range of the occupant's head.

[0072] In order to make it easier for the first protrusion 303 to squeeze the latch 402 and compress the spring 404 to retract when the forward acceleration of the vehicle is less than the preset negative threshold, in some embodiments, as Fig.10 As shown, the second end of the latch 402 has a chamfer, such as Fig.11 and Fig.13 As shown, the first protrusion 303 is a trapezoidal protrusion.

[0073] Taking into account the different ages, weights and safety preferences of different occupants, when the occupant is younger or smaller in height and weight, the guardian needs a smaller inertial motion threshold to allow the protective cover body 200 to respond to inertial motion more sensitively and provide more protection opportunities for smaller occupants; when the occupant is older or smaller in height and weight, the neck's support force capacity is stronger. If the inertial motion threshold of the protective cover body 200 is set to a smaller value, the inertial motion of the protective cover body 200 will occur frequently, affecting the occupant's riding experience. Therefore, a larger inertial motion threshold is required to allow the vehicle to trigger the motion protection function of the protective cover body 200 only when a collision causing sufficient damage occurs.

[0074] In order to allow the user to adjust the inertial motion threshold of the protective cover body 200 according to needs to meet the needs of different passengers, in some embodiments, such as Figures 8 to 10 As shown, the bayonet assembly 400 further includes an adjusting bolt 403 disposed between the bayonet 402 and the spring 404, which is used to adjust the preload force of the spring 404. The first end of the adjusting bolt 403 is tightened by the spring 404, and the second end is threadedly connected to the bayonet 402. The length of the spring 404 against the bayonet 402 is adjusted by relative rotation of the bayonet 402 and the adjusting bolt 403, thereby adjusting the preload force of the spring 404, that is, adjusting the inertial motion threshold of the protective cover body 200.

[0075] The relative rotation between the bayonet 402 and the adjusting bolt 403 can be achieved by adjusting the bayonet 402 to rotate relative to the adjusting bolt 403. In order to avoid relative rotation between the adjusting bolt 403 and the bayonet 402 after adjustment, in some embodiments, such as Figure 8 to Figure 11As shown, the bayonet assembly 400 further includes a positioning pin 405, the bayonet 402 is provided with a travel slot 406 extending along its telescopic direction, and the bayonet base 401 is provided with a positioning pin hole 407. Fig.11 As shown, the positioning pin 405 penetrates into the positioning pin hole 407 and the travel slide groove 406 to limit the circumferential rotation of the locking pin 402.

[0076] Since the directions of the travel slot 406 are different after the locking pin 402 is rotated to adjust the inertial motion thresholds of the protective cover body 200 of different sizes, in order to ensure that the positioning pin 405 can penetrate the travel slot 406, in some embodiments, such as Fig.11 As shown, there are multiple positioning pin holes 407 distributed along the circumference of the locking pin 402 .

[0077] In order to allow the user to intuitively adjust the inertial motion threshold of the protective cover body 200 according to needs, in some embodiments, such as Fig.11 As shown, there are multiple positioning pin holes 407 and they are arranged along the axial direction of the bayonet 402. The positioning pin 405 penetrates the positioning pin holes 407 at different axial positions and then penetrates the travel slide groove 406. The positioning pin 405 limits the axial position of the bayonet 402, thereby adjusting the length of the spring 404 against the bayonet 402, and adjusting the inertial motion threshold value of the protective cover body 200. The adjustment is simple and reliable, and has high feasibility. Different inertial motion threshold values ​​corresponding to the positioning pin holes 407 at different axial positions can be obtained through repeated experiments.

[0078] In order to provide the occupant with time to take a seat and prevent the protective cover 200 from restricting the occupant when it moves quickly from the highest position 200A to the normal position 200B, in some embodiments, the active safety protection device for the occupant further includes a buffer mechanism for buffering the movement of the protective cover 200 from the highest position 200A to the normal position 200B. The protective cover 200 can move slowly from the highest position 200A to the normal position 200B. Before taking a seat, the occupant pushes the protective cover 200 to the highest position 200A, and the protective cover 200 begins to move slowly toward the normal position 200B. During this period, the occupant can take a seat leisurely without worrying about the head hitting the protective cover 200. In addition, the buffering of the movement of the protective cover 200 from the highest position 200A to the normal position 200B also avoids excessive impulse that causes the buffering protective cover 200 to rush through the normal position 200B to reach the blocking position 200C.

[0079] As an implementation of the buffer mechanism, in some embodiments, such as Figure 8 , Fig.11 and Fig.12As shown, a plurality of second protrusions 302 are provided on the groove surface, which are used to abut against the bayonet pin 402 to buffer the movement of the protective cover body 200 from the highest position 200A to the normal position 200B. The plurality of second protrusions 302 are arranged at intervals in the sliding direction, and the protrusion height of the second protrusions 302 is lower than the protrusion height of the first protrusion 303. The second protrusions 302 whose protrusion height is lower than the protrusion height of the first protrusion 303 will not block the bayonet pin 402. The plurality of second protrusions 302 are arranged at intervals in the sliding direction and abut against the bayonet pin 402 one by one, thereby slowing down the movement of the protective cover body 200 from the highest position 200A to the normal position 200B. The structure is simple and easy to implement.

[0080] In order to make it easier for the second protrusion 302 to squeeze the latch 402 and compress the spring 404 to retract, in some embodiments, as Fig.10 and Fig.11 As shown, the second end of the latch 402 has a chamfer, and the second protrusion 302 is a trapezoidal protrusion.

[0081] In some other embodiments, the buffer mechanism is a damping mechanism, which can also achieve the buffering of the movement of the protective cover body 200 from the highest position 200A to the normal position 200B.

[0082] In order to ensure the strength and stability of the safety seat headrest 100 when it is impacted by the occupant's head, in some embodiments, Fig.15 As shown, the occupant active safety protection device further includes a backboard 101 and a first safety strap 500 in a herringbone shape. The backboard 101 is used to insert the safety seat headrest 100 on the seat of the vehicle. The sliding connection mechanism includes a pair of sliding frames 300 fixed on both sides of the safety seat headrest 100. The first safety strap 500 has a first end for connecting to the vehicle and a pair of second ends respectively fixedly connected to the pair of sliding frames 300. The upper strap is used to pull the sliding frame 300 to ensure the strength of the top of the headrest. The bottom of the safety seat headrest 100 is limited by the backboard 101 as a limiting mechanism, and the installation stability is high.

[0083] As an alternative embodiment, Fig.16 As shown, the occupant active safety protection device also includes a backrest 101 and a second safety strap 500'. The backrest 101 is used to insert the safety seat headrest 100 on the vehicle. The first end of the second safety strap 500' is used to connect to the vehicle, and the second end is connected to the rear side of the safety seat headrest 100, which can also ensure force strength and stability.

[0084] refer to Fig.17 and Fig.19As shown, in some embodiments, the occupant active safety protection device further includes a skin 102 made of energy absorbing material, and the sliding connection mechanism includes a pair of sliding frames 300 fixed on both sides of the safety seat headrest 100, and the skin 102 wraps the sliding frames 300. The skin 102 matching the seat shape is sleeved on the outside of the sliding frame 300, which not only beautifies the shape of both sides of the protection device, but also allows the safety seat headrest 100 to have a new function of protecting the occupant's head safety by absorbing energy in a side collision.

[0085] In order to ensure that the protective cover 200 can quickly move from the normal position 200B to the blocking position 200C under the action of inertia when the forward acceleration of the vehicle is less than the preset negative threshold, in some embodiments, such as Fig.17 and 18 As shown, a channel 201 extending forward is provided at the top of the protective cover 200, and an inertial body 202 is provided in the channel 201. The inertial body 202 is in sliding or rolling contact with the channel 201. The inertial body 202 is configured to slide or roll relative to the channel 201 under the action of inertia, and drive the protective cover 200 to move to the blocking position 200C. The movement of the inertial body 202 in the channel 201 can cause the center of gravity of the entire protective cover 200 to change, and the collision between the inertial body 202 and the front end of the channel 201 will also bring impulse, thereby increasing the movement speed of the protective cover 200.

[0086] like Fig.17 and Fig.18 As shown, the inertial body 202 includes at least one spherical inertial body that can roll along the channel 201, such as a metal ball, etc. In other embodiments, the inertial body may also include inertial bodies of other shapes, such as a rectangular parallelepiped, a drum, an ellipsoid, etc. Fig.18 As shown, a receiving groove 203 is provided at the bottom of the rear side of the channel 201, which is used to maintain the static state of the spherical inertial body in the channel 201 when the protective cover body 200 is in the normal position 200B. That is to say, the spherical inertial body is held by the receiving groove 203 when the protective cover body 200 is in the normal position 200B, and when the forward acceleration of the vehicle is not less than the preset negative threshold, the center of gravity of the spherical inertial body is not enough to cross the notch of the receiving groove 203. When the forward acceleration of the vehicle is less than the preset negative threshold, the spherical inertial body will break away from the receiving groove 203 under the action of inertia and quickly impact toward the front end along the channel 201. In some embodiments, the receiving groove 203 can be configured as an arc-shaped groove that matches the contour of the spherical inertial body.

[0087] The above-mentioned embodiments of the active safety protection device for occupants of the present disclosure can be applied to child safety seats, vehicle seats or vehicles. Accordingly, the present disclosure provides a child safety seat, a vehicle seat and a vehicle, which can include any of the above embodiments of the active safety protection device for occupants. The vehicle of the present disclosure can also include the above-mentioned child safety seat or the above-mentioned vehicle seat as a means of transportation.

[0088] So far, various embodiments of the present disclosure have been described in detail. In order to avoid obscuring the concept of the present disclosure, some details known in the art are not described. Based on the above description, those skilled in the art can fully understand how to implement the technical solution disclosed here.

[0089] Although some specific embodiments of the present disclosure have been described in detail by way of examples, it should be understood by those skilled in the art that the above examples are for illustration only and are not intended to limit the scope of the present disclosure. It should be understood by those skilled in the art that the above embodiments may be modified or some technical features may be replaced by equivalents without departing from the scope and spirit of the present disclosure. The scope of the present disclosure is defined by the appended claims.

Claims

1. An active safety protection device for passengers, used for active safety protection of passengers in a vehicle, characterized in that: include: A safety seat headrest (100) for installation on the vehicle; and A protective cover body (200) is movably mounted on the safety seat headrest (100), and has a highest position (200A), a normal position (200B) and a blocking position (200C) in its movement trajectory; when the protective cover body (200) is at the highest position (200A), there is a gap in the vertical direction between the head of the occupant in the normal sitting position; when the protective cover body (200) is at the normal position (200B), there is a gap between the head of the occupant in the normal sitting position, and a portion of the protective cover body (200) is located above the head of the occupant; when the protective cover body (200) is at the blocking position (200C), the inertial swing range of the occupant's head can be limited; The protective cover body (200) is configured to: move from the highest position (200A) to the normal position (200B) under the action of its own weight; and move from the normal position (200B) to the blocking position (200C) under the action of inertia when the forward acceleration of the vehicle is less than a preset negative threshold.

2. The active occupant safety protection device according to claim 1, characterized in that: The movement of the protective cover body (200) relative to the safety seat headrest (100) is rotation or sliding.

3. The active occupant safety protection device according to claim 1, characterized in that: It also includes a buffer mechanism for buffering the movement of the protective cover body (200) from the highest position (200A) to the normal position (200B).

4. The active occupant safety protection device according to claim 1, characterized in that: It also comprises a sliding connection mechanism, which is arranged between the protective cover body (200) and the safety seat headrest (100) and is used to realize the movement of the protective cover body (200) relative to the safety seat headrest (100).

5. The active occupant safety protection device according to claim 4, characterized in that: The sliding connection mechanism comprises a sliding frame (300) provided with a sliding groove (304) and a roller assembly (301) arranged in the sliding groove (304); the sliding frame (300) is fixedly mounted on the outer side of the safety seat headrest (100); and the roller assembly (301) is rotatably connected to the end of the protective cover body (200) located on the outer side of the safety seat headrest (100).

6. The active occupant safety protection device according to claim 5, characterized in that: The roller assembly (301) comprises at least two groups of rollers, each group of rollers comprises two rollers respectively mounted on the inner side and the outer side of the protective cover body (200), and the at least two groups of rollers are arranged at intervals along the sliding direction of the sliding groove (304).

7. The active occupant safety protection device according to claim 5, characterized in that: The sliding groove (304) is an arc-shaped groove, and the sliding frame (300) is provided with a long accommodating notch (305) on the surface opposite to the protective cover body (200) for the protective cover body (200) to be embedded and rotated.

8. The active occupant safety protection device according to claim 5, characterized in that: The invention also includes a latch assembly (400) arranged in the sliding groove (304), wherein the latch assembly (400) includes a latch base (401) fixedly mounted on the protective cover body (200), and a latch (402) and a spring (404) mounted in the latch base (401); the first end of the latch (402) is tightened by the spring (404), and the second end abuts against the groove surface of the sliding groove (304); the groove surface is provided with a first protrusion (303) for locking the second end of the latch (402) when the forward acceleration of the vehicle is not less than a preset negative threshold value, so as to limit the protective cover body (200) to the normal position (200B).

9. The active occupant safety protection device according to claim 8, characterized in that: The second end of the latch (402) has a chamfer, and the first protrusion (303) is a trapezoidal protrusion.

10. The active occupant safety protection device according to claim 8, characterized in that: The bayonet assembly (400) further comprises an adjusting bolt (403) disposed between the bayonet (402) and the spring (404) for adjusting the preload force of the spring (404); the first end of the adjusting bolt (403) is tightened by the spring (404) and the second end is threadedly connected to the bayonet (402).

11. The active occupant safety protection device according to claim 10, characterized in that: The bayonet assembly (400) further comprises a positioning pin (405), the bayonet (402) being provided with a travel slide groove (406) extending along its telescopic direction, the bayonet base (401) being provided with a positioning pin hole (407), the positioning pin (405) being inserted into the positioning pin hole (407) and the travel slide groove (406) to limit the circumferential rotation of the bayonet (402).

12. The active occupant safety protection device according to claim 11, characterized in that: The positioning pin holes (407) are multiple and are distributed along the circumference and / or axial direction of the bayonet (402).

13. The active occupant safety protection device according to claim 8, characterized in that: A plurality of second protrusions (302) are provided on the groove surface for abutting against the latch (402) to cushion the movement of the protective cover body (200) from the highest position (200A) to the normal position (200B); the plurality of second protrusions (302) are arranged at intervals in the sliding direction; and the protrusion height of the second protrusion (302) is lower than the protrusion height of the first protrusion (303).

14. The active occupant safety protection device according to claim 13, characterized in that: The second end of the latch (402) has a chamfer, and the second protrusion (302) is a trapezoidal protrusion.

15. The active occupant safety protection device according to claim 4, characterized in that: It also comprises a backrest (101) and a first safety strap (500) in a herringbone shape, wherein the backrest (101) is used to insert the safety seat headrest (100) on the seat of the vehicle, the sliding connection mechanism comprises a pair of sliding frames (300) fixed on both sides of the safety seat headrest (100), and the first safety strap (500) has a first end for connecting to the vehicle, and a pair of second ends fixedly connected to the pair of sliding frames (300) respectively.

16. The active occupant safety protection device according to claim 1, characterized in that: It also includes a backrest (101) and a second safety strap (500'), wherein the backrest (101) is used to insert the safety seat headrest (100) on the seat of the vehicle, and the first end of the second safety strap (500') is used to connect to the vehicle, and the second end is connected to the rear side of the safety seat headrest (100).

17. The active occupant safety protection device according to claim 4, characterized in that: It also includes a cover (102) made of energy-absorbing material. The sliding connection mechanism includes a pair of sliding frames (300) fixed on both sides of the safety seat headrest (100), and the cover (102) wraps the sliding frames (300).

18. The active occupant safety protection device according to claim 1, characterized in that: The top of the protective cover body (200) is provided with a channel (201) extending forward, and an inertial body (202) is provided in the channel (201). The inertial body (202) is in sliding or rolling contact with the channel (201) and is configured to slide or roll relative to the channel (201) under the action of inertia, and drive the protective cover body (200) to move to the blocking position (200C).

19. The active occupant safety protection device according to claim 18, characterized in that: The inertial body (202) comprises at least one spherical inertial body that can roll along the channel (201), and a receiving groove (203) is provided at the bottom of the rear side of the channel (201) for maintaining the spherical inertial body in a stationary state in the channel (201) when the protective cover body (200) is in the normal position (200B).

20. A child safety seat, characterized in that: include: The active safety protection device for occupants according to any one of claims 1 to 19.

21. A vehicle seat, characterized in that: include: The active safety protection device for occupants according to any one of claims 1 to 19.

22. A vehicle, characterized in that: include: An active occupant safety protection device as claimed in any one of claims 1 to 19, a child safety seat as claimed in claim 20, or a vehicle seat as claimed in claim 21.

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