Safety structure for seat

Abstract

The safety structure comprises a cushion base plate, a safety belt connecting device, a buffer layer and an anti-collision protection pad, a U-shaped connecting part is arranged at the position, between two legs, of the front end of the cushion base plate, and the U-shaped connecting part and the cushion base plate are integrally formed in a punching mode. The safety belt connecting device connected to the safety belt can tie and fix the safety belt located on the abdomen of the passenger when the safety belt is normally tied to the U-shaped connecting part between the thighs of the passenger, and the abdomen of the passenger is prevented from being pressed. The safety belt connecting device connected to the U-shaped connecting part can be buried in the U-shaped space, so that the safety belt connecting device is prevented from causing secondary damage to the thigh root of the passenger; according to the safety cushion, the U-shaped connecting part and the cushion base plate are integrally punched and formed, so that the thickness and the production cost of the safety cushion are reduced while the structural strength of the safety cushion is guaranteed; by laying the buffer layer, the U-shaped connecting part can be prevented from hurting passengers, and the riding comfort can be improved.

Description

Technical Field

[0001] The invention relates to the technical field of safety cushions, in particular to a safety structure used on a seat. Background Art

[0002] With cars rapidly entering thousands of households and the promotion and application of other more convenient public transportation, more and more pregnant women, children and other people whose abdomens cannot bear pressure need to drive or take public transportation to travel. Because the car seat belt will suddenly tighten when braking or encountering a traffic accident, it will compress or injure the abdomen of people whose abdomens cannot bear pressure, causing harm to these people.

[0003] Chinese utility model patent CN205589177U discloses a safety belt fixing device for pregnant women, including a bracket body fixed on a seat and a safety belt winding handle installed on the surface of the bracket body. By fixing the bracket body on the seat between the thighs, the safety belt is tightly hooked by the winding handle and fixed between the thighs, so that the safety belt will not cause pressure on the belly of the pregnant woman in case of an emergency. However, the safety belt fixing device of this scheme is made of hard material and protrudes and is exposed between the thighs of the passenger. When braking or encountering a traffic accident, the perineum and thigh roots of the pregnant woman are very likely to hit the metal hook and cause secondary injury.

[0004] Chinese utility model patent CN208411663U discloses a safety belt for pregnant women in the rear seat of a car. Based on the existing car safety belt, this device leads a safety belt webbing from the LATCH interface of the rear seat of the car and extends it from the gap of the rear seat to the crotch position of the pregnant woman, and installs an O-shaped connecting buckle at the crotch position of the pregnant woman, so that the car safety belt passes between the thighs of the pregnant woman, avoiding the adverse effect of the safety belt on the baby in the belly. However, the pregnant woman's safety belt of this scheme can only be installed in the rear seat of the car, and cannot be installed and fixed in the front seat of the car; and the O-shaped connecting buckle directly contacts the crotch position of the pregnant woman, which may cause secondary injuries such as impact to the perineum and thigh roots of the pregnant woman when braking or encountering a traffic accident.

[0005] Chinese invention patent CN106627473A discloses a safety belt for pregnant women, which includes a cushion and a safety belt fixing device. The cushion is provided with openings in the middle and two front corners, and safety belt fixing belts are provided at the two rear corners respectively. The safety belt fixing belts can pass through the opening in the middle or the openings in the two front corners to fix the car's safety belt in the middle of the user's thigh or the outside of the thigh. The safety belt can protect the user's abdomen when the car collides, and can be used regardless of whether the user wears a skirt or pants. However, the safety belt for pregnant women provided by this scheme is not only difficult to install and disassemble, but also only uses textiles and safety belts to make a safety cushion. Due to the lack of protection of high-strength structural parts, it is easy to cause safety hazards. Summary of the invention

[0006] The technical problem to be solved by the present invention is: in view of the shortcomings of the prior art, a safety seat cushion is provided which has high-strength support and protection, is safe and stable, does not cause secondary injuries, is easy to operate, and is suitable for installation in front and rear seats to prevent abdominal pressure, and meets the requirements of lightweight design. The safety structure for a seat provided in the present application adopts the following technical solution: A safety structure for a seat, the seat comprising a safety belt, the safety structure comprising: The seat cushion base is a plate-like structure arranged on the seat and used to bear weight. The front end of the seat cushion base is located between the two legs and has a U-shaped connecting portion integrally formed with the seat cushion base. The U-shaped connecting portion includes a horizontal bottom surface, a U-shaped inner side surface and a U-shaped outer side surface. The U-shaped outer side surface is integrally formed with the seat cushion base on both sides thereof. The horizontal bottom surface is connected to the U-shaped inner side surface to form a U-shaped space. The position of the horizontal bottom surface is higher than the seat cushion base on both sides of the U-shaped connecting portion, so that a hollow structure is formed below the U-shaped connecting portion. A safety belt connecting device, comprising a first connecting end for connecting to the safety belt and a second connecting end capable of connecting to the U-shaped connecting portion in the U-shaped space; A cushioning layer wraps the seat cushion substrate to form a seat cushion; and The anti-collision protection pad is arranged on the seat cushion base plate on the side of the U-shaped connecting part close to the user, and is used to restrain the safety belt so that the safety belt forms surface contact with the user's thigh root and lower abdomen bottom to prevent the side of the safety belt from cutting the user.

[0007] Furthermore, the U-shaped connecting part is formed in the middle part of the seat cushion substrate by stamping or a one-time molding process, and the one-time molding process is casting, forging, 3D printing, machining, injection molding, selective laser melting, selective laser sintering, metal deposition, blow molding, injection molding, calendering, vacuum forming, compression molding, lamination, thermoforming, vacuum forming, rotational molding, RTM (resin transfer molding), autoclave (AC) molding, oven molding, extrusion molding, compression molding, molding, pultrusion, fiber winding, spray molding and contact molding.

[0008] Furthermore, the depth of the U-shaped inner side surface is not less than the height of the safety belt connection device, so that the U-shaped inner side surface and the U-shaped outer side surface surround and protect the safety belt connection device connected to the U-shaped connecting part.

[0009] Furthermore, the U-shaped connecting portion also includes a top surface, and the connection between the top surface and the U-shaped inner side surface and the U-shaped outer side surface is configured as a smooth rounded corner connection, and the U-shaped inner side surface and the U-shaped outer side surface are both three-sided sloped and gradually convex shapes.

[0010] Furthermore, the seat cushion base plate is provided with an upward protrusion at the outer side of the two legs, a clamping sleeve is installed under the protrusion, and the two ends of the clamping sleeve are respectively fixed to the bottom of the seat cushion base plate and the end of the protrusion, forming a hollow structure installation groove under the protrusion.

[0011] Furthermore, a length-adjustable connection component is installed in the installation groove, and the connection component can pass through the rear of the seat cushion base plate and be detachably connected to the ISOFIX interface of the child safety seat fixing system (International Standards Organization FIX).

[0012] Furthermore, the second connecting end includes a connecting seat and a connecting rod whose two ends are respectively fixed on the connecting seat and the first connecting end; a mounting hole and a plurality of limit members connected by a slide groove are provided on the horizontal bottom surface of the U-shaped connecting portion; the connecting seat can pass through the mounting hole; the connecting rod can slide freely in the slide groove; and when sliding to a suitable position, the connecting seat is clamped and fixed by the limit members.

[0013] Furthermore, the connecting rod is a cylindrical rod with two opposite surfaces cut into planes, the connecting seat is a disk with a diameter larger than the diameter of the arc surface of the connecting rod, and the limiting member is a plurality of limiting holes spaced apart and distributed on the horizontal bottom surface; The width of the slide groove is greater than the distance between the two planes of the connecting rod and smaller than the diameter of the arc surface. The size of the limiting hole is greater than the diameter of the arc surface of the connecting rod and smaller than the diameter of the connecting seat, so that the connecting rod can slide freely in the slide groove in two plane directions, and when the limiting hole rotates to the width of the arc surface under the action of external force, it is clamped in the limiting hole.

[0014] Furthermore, the connecting rod is a cylindrical rod with a length greater than the depth of the slide groove, the connecting seat is a disc with a diameter greater than the diameter of the connecting rod, and the limiting member is a plurality of limiting grooves spaced apart at the bottom of the slide groove.

[0015] Furthermore, the diameters of the mounting hole and the limiting groove are larger than the diameter of the connecting seat, the width of the sliding groove is larger than the diameter of the connecting rod and smaller than the diameter of the connecting seat; under external force, the connecting rod can slide freely in the sliding groove; after the external force is removed, the connecting seat is engaged in the corresponding limiting groove under the tightening force of the seat belt.

[0016] Furthermore, a height adjustment pad is installed below the seat cushion base plate through a connecting piece, and the connecting piece is a connecting hole, a connecting groove or a connecting block provided on the seat cushion base plate.

[0017] In summary, the present application includes at least one of the following beneficial technical effects: 1. By setting the seat cushion base plate as a plate-shaped structure, the structural strength of the safety seat cushion of the present application can be improved, and better protection can be provided for passengers whose abdomens cannot be compressed; by setting a U-shaped connecting portion integrally formed with the seat cushion base plate at a position between the two legs on the seat cushion base plate, and detachably connecting the seat belt connecting device installed on the seat belt to the U-shaped connecting portion, the seat belt knot located at the abdomen when normally fastened can be fixed between the thighs of the passenger to prevent the passenger's abdomen from being compressed, and the seat belt connecting device connected to the U-shaped connecting portion can be buried in the U-shaped space surrounded by the horizontal bottom surface and the inner side surface of the U-shaped, which can prevent the seat belt from being connected. The safety belt connection device causes secondary injuries to the passengers; compared with installing a safety belt connection device protection cover on the seat cushion base plate, the present application integrates the U-shaped connection part and the seat cushion base plate into a design that reduces the thickness and production cost of the safety cushion while ensuring the structural strength of the safety cushion; by laying a buffer layer, it can not only prevent the protection cover from causing harm to the passengers, but also improve the riding comfort; the safety belt connected between the thighs is adjusted by the anti-collision protection pad, so that the middle part of the safety belt forms a surface contact with the user's thigh root and the bottom of the lower abdomen, which can not only improve the user's comfort, but also avoid the side of the safety belt from cutting the user.

[0018] 2. The U-shaped inner side surface and the U-shaped outer side surface are three-sided gradually convex side surfaces, and the connection between the top surface and the U-shaped inner side surface and the U-shaped outer side surface is set to a smooth rounded connection, which can release and alleviate the collision pressure, avoid direct collision between passengers and the U-shaped cover when a vehicle, transportation vehicle or amusement facility collides, and protect the safety of passengers.

[0019] 3. By arranging a slide groove and a plurality of limiting holes or limiting grooves on the horizontal bottom surface of the U-shaped connecting part, the connection position of the safety belt connecting device and the horizontal bottom surface can be adjusted, and the connecting rod at the second connecting end moves in the slide groove to select a suitable limiting groove for connection and fixation according to the abdominal size and body shape of different passengers. Therefore, the safety structure of the present application can be suitable for passengers of different body shapes, improving the comfort of passengers, and is easy to install and operate. At the same time, the safety belt can be fastened as close to the passenger's thigh root as possible, minimizing the user's forward displacement when braking or in an accident, so that the safety belt can generate a binding force in time, and can trigger the airbag to open in time in a serious accident, thereby improving the safety of the safety seat cushion of the present application.

[0020] 4. By installing a hook that can be detachably connected to the ISOFIX interface or LATCH interface of the child safety seat fixing system at one end of the fixing belt passing through the seat cushion base, the safety seat cushion of the present application can be installed on the rear seat with the ISOFIX interface or LATCH interface of the child safety seat fixing system through the hook; and the fixing belt can also be externally connected to a connecting belt with a buckle to fix the seat cushion on the backrest of the front seat, so the safety seat cushion of the present invention can be installed on both the front seat and the rear seat. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the overall structure of a safety structure used on a seat of the present invention; Figure 2 is a front cross-sectional view of a safety structure for a seat of the present invention; Figure 3 is a side sectional view of a safety structure for a seat of the present invention; Figure 4 It is a schematic diagram of the safety belt connected to the U-shaped connection; Figure 5 Schematic diagram of the use status of the long strip anti-collision protection pad; Figure 6 Schematic diagram of the use status of the triangular anti-collision protection pad; Figure 7 It is a schematic diagram of the forward structure of the U-shaped connecting part of the present invention; Figure 8 is a schematic structural diagram of the horizontal bottom surface of the U-shaped connecting portion in the first embodiment; Fig. 9 is a structural schematic diagram of the safety belt connection device in the second embodiment; Fig.10 is a schematic diagram of the top structure of the horizontal bottom surface of the U-shaped connecting portion in the second embodiment; Fig.11 is a schematic diagram of the bottom structure of the horizontal bottom surface of the U-shaped connecting portion in the second embodiment; Fig.12 It is a structural schematic diagram of the safety belt connecting device in the second embodiment.

[0022] Fig.13 It is a schematic diagram of the structure of the cushion substrate in Example 3.

[0023] Reference numerals: 100-seat base plate, 110-U-shaped connecting part, 111-horizontal bottom surface, 1111-mounting hole, 1112-slide groove, 1113-limiting hole, 1114-limiting groove, 112-top surface, 113-U-shaped inner side surface, 114-U-shaped outer side surface, 115-top plate, 120-protruding part, 130-card sleeve, 140-mounting groove, 150-through hole, 160-connecting hole; 170-first protruding part, 180-second protruding part, 181-ISOFIX hard interface connector; 200-seat belt connecting device, 210-first connecting end, 211-fixed rod, 212-movable rod, 213-rotation pair, 214-fastener, 215-gap, 220-second connecting end, 221-connecting seat, 222-connecting rod; 300-buffer layer, 400-anti-collision protection pad. DETAILED DESCRIPTION

[0024] The following embodiments of the present invention are described in further detail in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0025] In the description of the present invention, it should be noted that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0026] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "connected" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0027] Embodiment 1: like Figures 1 to 3 As shown, the present application provides a safety structure for a seat, the seat includes a seat belt, and the safety structure includes: The seat cushion base plate 100 is a plate-like structure arranged on the seat and used for bearing weight. The front end of the seat cushion base plate 100 is located between the two legs and has a U-shaped connecting portion 110 integrally formed with the seat cushion base plate 100. The U-shaped connecting portion 110 includes a horizontal bottom surface 111, a U-shaped inner side surface 113 and a U-shaped outer side surface 114. The U-shaped connecting portion 110 is integrally stamped with the seat cushion base plates 100 on both sides thereof. The two sides of the U-shaped inner side surface 113 are respectively connected to the top surface 112 and the horizontal bottom surface 111. The horizontal bottom surface 111 is connected to the U-shaped inner side surface 113 to form a U-shaped space together. The position of the horizontal bottom surface 111 is higher than the seat cushion base plates 100 on both sides of the U-shaped connecting portion 110, so that a hollow structure is formed below the U-shaped connecting portion 110. A safety belt connecting device 200, comprising a first connecting end 210 for connecting to the safety belt and a second connecting end 220 capable of connecting to the U-shaped connecting portion 110 in the U-shaped space; A cushion layer 300 wraps the seat cushion substrate 100 to form a seat cushion; and The anti-collision protection pad 400 is arranged on the seat cushion base plate 100 on the side of the U-shaped connecting part 110 close to the user, and is used to restrain the safety belt so that the safety belt forms surface contact with the user's thigh root and lower abdomen to prevent the side of the safety belt from cutting the user.

[0028] The safety structure for a seat of the present application can be installed on a vehicle, transportation vehicle or amusement facility as well as a seat or cushion to protect the safety of pregnant women and children, and can also be manufactured and processed in an integrated manner with the seat of a vehicle, transportation vehicle or amusement facility. By setting the seat cushion base plate 100 to a plate-like structure, the structural strength of the safety seat cushion of the present application can be improved to cope with sudden high-strength impact forces, thereby providing better protection for the passenger; the present invention sets a U-shaped connecting portion 110 integrally formed with the seat cushion base plate 100 at a position between the two legs on the seat cushion base plate 100, and the seat belt connecting device 200 installed on the safety belt is detachably connected to the connecting portion. After fastening the seat belt in accordance with the existing technical specifications, the seat belt knot located on the passenger's abdomen is fixed between the passenger's thighs through the seat belt connecting device 200. In the event of a safety accident or braking, the contraction force of the seat belt will all act on the passenger's thighs, which can avoid compressing the passenger's abdomen and causing discomfort when the seat belt contracts; while fixing the seat belt connecting device 200, the U-shaped connecting portion 110 can hide the seat belt connecting device 200 in the U-shaped space and bury it in the seat cushion body. The middle position of the seat belt connection device 200 prevents the secondary injury to the passenger; compared with installing the seat belt connection device 200 protective cover on the cushion base plate 100, the present application integrates the U-shaped connection part 110 with the cushion base plate 100, which reduces the thickness and production cost of the safety cushion while ensuring the structural strength of the safety cushion; by setting the lower part of the U-shaped connection part 110 as a hollow structure, sufficient space can be provided for the installation and operation of the seat belt connection device 200 without increasing the thickness of the safety cushion; by laying the buffer layer 300, it can not only prevent the protective cover from causing harm to the passenger, but also improve the riding comfort; by adjusting the seat belt connected between the thighs through the anti-collision protection pad 400, the middle part of the seat belt forms a surface contact with the user's thigh root and lower abdomen, which can not only improve the user's comfort, but also prevent the side of the seat belt from cutting the user. Therefore, the present application is not only easy to operate and has a stable structure, but also takes into account comfort while ensuring safety and reliability.

[0029] like Figures 1 to 3 As shown, the anti-collision protection pad 400 is arranged on the seat cushion base plate 100 on the side of the U-shaped connecting part 110 close to the user. The anti-collision protection pad 400 is a cut-resistant layer made of high-density fabric layer, silicone, rubber, sponge and other elastic materials. It is generally a flexible pad. When in use, it is manually placed between the seat belt and the human body. While it plays an isolation and buffering role, it can also change the contact posture between the seat belt and the human body, and change the linear contact state between the seat belt and the human abdomen to surface contact, which greatly improves safety. When the user sits on the seat, the human abdomen and thighs are in a vertical state with a small folding angle. The applicant found in the research test that Figure 4As shown, when the safety belt is connected to the U-shaped connecting part 110, the safety belt that restrains the thigh root is in surface contact with the thigh, but the safety belt is in side contact with the abdomen of the human body. When dealing with a large impact force, although the safety belt has a good restraint on the thigh, the side of the safety belt will cause or strangle the abdomen of the human body, which is not only less comfortable, but also poses a safety hazard. Figure 5 and Figure 6 As shown, the present invention provides an anti-collision protection pad 400 and utilizes an anti-cutting layer made of elastic materials such as a high-density fabric layer, silicone, rubber, and sponge to fill the user's groin, thereby changing the posture of the safety belt so that the middle of the safety belt can form surface contact with the user's thigh root and lower abdomen, while the side of the safety belt is no longer in direct contact with the user, and the tension of the safety belt in the event of a traffic accident or braking is transferred to the anti-collision protection pad 400. The user is protected by the anti-collision protection pad 400 to prevent the side of the safety belt from cutting or impacting the user, while also improving the user's comfort.

[0030] It should be noted that, considering the working principle of the anti-collision protection pad 400 of the present invention, the anti-collision protection pad 400 of the present invention can be any cushion layer with a buffering function, and is not subjected to tension but only to pressure. Therefore, the specific position and shape setting can be relatively arbitrary, and can be fixed on the seat cushion base 100, or fixed on the external covering layer, or can be movably set, or directly covered on the safety belt. When in use, the anti-collision protection pad 400 can be slid to the thigh root restraint area. Figure 5 In the embodiment, the anti-collision protection pad 500 is in the form of two long strips, which are respectively located between the safety belt and the root of the thigh; Figure 6 In the figure, the anti-collision protection pad 500 is approximately triangular in shape, covering the entire abdomen of the user, and can restrain the safety belt at the root of the thigh to prevent the side of the safety belt from cutting or strangling the user's abdomen.

[0031] like Figure 2 and Figure 7As shown, the U-shaped connection part 110 is formed by stamping the middle part of the seat cushion base plate 100, and the structure of the U-shaped connection part 110 can be obtained by stamping. It can also be obtained by integrated molding processes such as casting, forging, 3D printing, machining, injection molding, selective laser melting, selective laser sintering, metal deposition, blow molding, injection molding, calendaring, vacuum molding, compression molding, lamination, thermoforming, vacuum molding, rotational molding, RTM (resin transfer molding) molding, autoclave (AC) molding, oven molding, extrusion molding, compression molding, molding, pultrusion molding, fiber winding molding, injection molding and contact molding. The horizontal bottom surface 111 is located higher (0.8-12 cm high) than the seat cushion base plate 100 on both sides of the U-shaped outer side surface 114, so that a hollow structure is formed below the U-shaped connection part 110, providing sufficient space for the installation and operation of the seat belt connection device 200. The depth of the U-shaped inner side surface 113 is greater than or slightly greater than (0.2-0.5 cm greater) the height of the safety belt connection device 200, so that the U-shaped inner side surface 113 and the U-shaped outer side surface 114 can completely cover the safety belt connection device 200 installed on the U-shaped connection part 110, avoiding the safety belt connection device 200 from causing secondary injuries such as collision with the passenger's thigh root. The U-shaped inner side surface 113 and the U-shaped outer side surface 114 are both three-sided sloped and gradually convex. Specifically, the bottom of the U-shaped inner side surface 113 is integrally formed with the horizontal bottom surface 111, and the top is inclined toward the direction of the U-shaped outer side surface 114, so that the angle between the U-shaped inner side surface 113 and the horizontal bottom surface 111 is α The bottom of the U-shaped outer side surface 114 is integrally formed with the cushion base plate 100, and the top is inclined toward the U-shaped inner side surface 113, so that the angle between the U-shaped outer side surface 114 and the cushion base plate 100 is β The angle is 100°-120°. The present invention sets the U-shaped inner side surface 113 and the U-shaped outer side surface 114 as a slope, which can improve the stability of the seat cushion base plate 100 on the one hand, provide high-strength stable support for passengers, and release and alleviate the impact pressure of the U-shaped connecting part 110 on the other hand, and avoid direct collision between passengers and the U-shaped connecting part 110 when a vehicle, transportation vehicle or amusement facility collides, thereby protecting the safety of passengers. At the same time, it can also increase the installation and operation space of the safety belt connecting device 200, and facilitate the installation and removal of the safety belt connecting device 200.

[0032] Through experiments, it is verified that by selecting the angle range of the U-shaped inner side surface 113 and the U-shaped outer side surface 114, under the condition of the same amount of material, the strength of the U-shaped connecting portion 110 of the present invention is increased by about 10%-20%. βThe angle is set to 100°-120°, so that the front impact force can be partially removed by sliding upward, and about 20-30% of the impact force can be removed, effectively protecting the safety of passengers. The connection between the top surface 112 and the U-shaped inner side surface 113 and the U-shaped outer side surface 114 is set to a smooth rounded connection, which can further release and alleviate the impact pressure of the U-shaped connection part 110 to avoid bumping the passengers.

[0033] like Figure 2 As shown, the seat base 100 is provided with an upward protrusion 120 at the position outside the two legs, and a clamping sleeve 130 is installed below the protrusion 120. The two ends of the clamping sleeve 130 are respectively fixed to the bottom of the seat base 100 and the end of the protrusion 120, and a mounting groove 140 with a hollow structure is formed below the protrusion. The present invention provides a U-shaped connecting portion 110 and a protrusion 120 with a hollow bottom structure on the seat base 100. On the one hand, it can provide space for the connection and fixation of the safety belt connecting device 200 and the installation of the seat fixing belt. On the other hand, it can form a hollow structure without increasing the thickness of the safety seat, reduce the space occupied by the safety seat, and greatly reduce the weight of the seat base 100. While ensuring the structural strength, a lightweight design is achieved, making it easy to carry.

[0034] The installation groove 140 is provided with a length-adjustable connection component, which can pass through the rear of the seat base plate and be detachably connected to the ISOFIX interface of the child safety seat fixing system. Specifically, the connection component is a seat cushion fixing belt or an ISOFIX hard interface connector of the child safety seat fixing system, and one end of the seat cushion fixing belt passing through the seat base plate 100 is provided with a hook that can be detachably connected to the ISOFIX interface of the child safety seat fixing system; one end of the ISOFIX hard interface connector of the child safety seat fixing system passing through the safety structure is provided with a buckle that can be detachably connected to the ISOFIX interface of the child safety seat fixing system. By setting the connection component as a seat cushion fixing belt or an ISOFIX hard interface connector of the child safety seat fixing system, the safety structure of the present application can be connected to the ISOFIX interface of the child safety seat fixing system on the rear seat cushion to meet the use specifications of different countries, so that users whose abdomens cannot be compressed can sit in the back row, providing them with better safety protection; and the length of the connection component can be adjusted, so that the safety structure of the present application can be applied to seats of different sizes. When the connection component is set as a cushion fixing belt, the hook on the cushion fixing belt can be connected to a fixing belt with a buckle, and the fixing belt is tied to the backrest of the front seat, and the buckle is fixed, so as to fix the safety structure on the front seat, providing protection for the user driving or sitting in the front row. As a preferred embodiment, the clamping sleeve 130 is made of engineering plastic, which can provide sufficient support strength on the one hand, and reduce the weight of the safety cushion on the other hand, meeting the lightweight design.

[0035] In some embodiments, Fig. 9 As shown, the first connection end 210 of the safety belt connection device 200 includes a fixed rod 211 and a movable rod 212, one end of the fixed rod 211 and the movable rod 212 are connected by a rotating pair 213, and the other end is detachably connected by a fastener 214, and a gap 215 is provided between the fixed rod 211 and the movable rod 212 for the safety belt to pass through, so that the movable rod 212 can rotate around one end of the fixed rod 211 to realize the opening and closing of the first connection end 210, so that it can be installed on the safety belt.

[0036] The second connection end 220 of the safety belt connection device 200 includes a connection seat 221 and a connection rod 222 whose two ends are respectively fixed on the connection seat 221 and the first connection end 210. The horizontal bottom surface 111 of the U-shaped connection part 110 is provided with a mounting hole 1111 and a plurality of limit members connected by a slide groove 1112. The connection seat 221 can pass through the mounting hole 1111, and the connection rod 222 can slide freely in the slide groove 1112, and when sliding to a suitable position, the connection seat 221 is clamped and fixed by the limit members.

[0037] In this embodiment, if Figure 8 and Fig. 9 As shown, the second connecting end 220 is fixed to the U-shaped connecting portion 110 by means of rotational connection. The connecting rod 222 is a cylindrical rod with two opposite surfaces cut into planes, the connecting seat 221 is a disk with a diameter larger than the diameter of the arc surface of the connecting rod 222, and the limiting member is a plurality of limiting holes 1113 spaced apart on the horizontal bottom surface; the width of the slide groove 1112 is larger than the distance between the two planes of the connecting rod 222 and smaller than the diameter of the arc surface, and the size of the limiting hole 1113 is larger than the diameter of the arc surface of the connecting rod 222 and smaller than the diameter of the connecting seat 221, so that the connecting rod 222 can slide freely in the slide groove 1112 in two plane directions, and when the limiting hole 1113 rotates to the width of the arc surface under the action of external force, it is clamped in the limiting hole 1113.

[0038] Specifically, the diameter of the mounting hole 1111 is larger or slightly larger (0.5-3mm larger) than the diameter of the connecting seat 221; the diameter of the limiting hole 1113 is slightly larger (0.5-3mm larger) than the diameter of the arc surface of the connecting rod 222, and the diameter of the limiting hole 1113 is smaller than the diameter of the connecting seat 221, the thickness of the flat rod portion formed after the connecting rod 222 is cut is slightly smaller than (0.5-2mm smaller) than the width of the slide groove 1112, and the diameter of the arc surface of the connecting rod 222 is larger than the width of the slide groove 1112, so that the width of the slide groove 1112 is adapted to the distance between the two planes of the connecting rod 222. When it is necessary to fix the safety belt connecting device 200 on the U-shaped connecting part 110, first, pass the connecting seat 221 through the mounting hole on the horizontal bottom surface 111, and then rotate the second connecting end 220 so that the two planes after the connecting rod 222 is cut are opposite to the two sides of the slide groove 1112. At this time, the connecting rod 222 can slide back and forth in the slide groove 1112. When the connecting rod 222 slides to the appropriate limiting hole 1113, rotate the second connecting end 220 so that the two arc surfaces of the connecting rod 222 are opposite to the two sides of the slide groove 1112. At this time, since the diameter of the arc surface of the connecting rod 222 is greater than the width of the slide groove 1112, the connecting rod 222 cannot slide in the slide groove 1112, and the connecting rod 222 is fixed in the limiting hole 1113, thereby fixing the safety belt connecting device 200.

[0039] When the safety belt connection device 200 of the present application is not in use, the first connection end 210 is connected to the safety belt on the seat. When in use, after the user sits on the safety structure, the second connection end 220 of the safety belt connection device 200 is fixed on the U-shaped connection part 110, and the limiting hole 1113 at a suitable position is selected according to the user's abdominal size and body shape to fix the connecting rod 222, so that the connection position of the second connection end 220 and the U-shaped connection part 110 can be adjusted. The installation position of the safety belt connection device 200 can be adjusted according to the abdominal size and body shape of different users, so that the safety belt on the vehicle or amusement facility is tied to the position as close to the user's thigh root as possible, and the displacement of the user's forward impact when braking or an accident occurs is reduced as much as possible, so that the safety belt generates a binding force in time, and the airbag can be triggered to open in time when a serious accident occurs, which improves the safety of the safety structure of the present application and also improves the comfort of the user when using the safety structure. After use, the second connection end 220 can be removed from the U-shaped connection part 110.

[0040] As a preferred embodiment, the buffer layer 300 is made of sponge, rubber pad, sponge pad, silicone pad or other buffer materials, which can improve the riding comfort of passengers on the one hand, and further bury the seat belt connection device 200 on the other hand to prevent the protective cover from causing secondary injuries such as bumps to passengers.

[0041] As a preferred embodiment, Figure 1 As shown, a plurality of through holes 150 are provided in the middle of the cushion substrate 100, so that the cushion substrate 100 forms a hollow structure, which can greatly reduce the weight of the cushion substrate 100 while ensuring the structural strength of the cushion substrate 100, thereby realizing a lightweight design and making the safety cushion of the present application easy to carry and use.

[0042] As a preferred embodiment, a height adjustment pad is installed under the cushion base through a connecting piece, and the connecting piece is a connecting hole, a connecting groove or a connecting block provided on the cushion base. Figure 1 As shown, in this embodiment, a plurality of connection holes 160 are provided on the seat cushion base plate 100, and a height adjustment pad can be installed under the seat cushion base plate 100 through the connection holes 160. The safety structure of the present invention can choose whether to install a height adjustment pad according to the height of different users, and select a height adjustment pad of appropriate thickness. Therefore, adults and children of different heights can use the safety structure of the present application.

[0043] As a preferred embodiment, the seat cushion substrate 100 is made of high-strength metal, alloy, high-strength carbon fiber, high-strength plastic, high-strength nylon, high-strength fiberglass, high-strength ceramic, carbon nanomaterial, super-strong polymer material, composite material, graphene or polymer material and the like. Through the high-strength seat cushion substrate 100, the safety seat cushion of the present application can withstand the impact force caused by traffic accidents or braking, and provide stable safety protection for passengers whose abdomen cannot be subjected to pressure.

[0044] As a preferred embodiment, a wrapping layer (not shown in the figure) is further provided outside the buffer layer 400 , and the wrapping layer is made of a flexible material such as cloth, etc., to further improve the comfort of the user.

[0045] Embodiment 2: In this embodiment, if Figures 10 to 12 As shown, the second connecting end 220 is fixed to the U-shaped connecting part 110 by means of a slot connection. The connecting rod 222 is a cylindrical rod with a height greater than the thickness of the slide groove 1112, the connecting seat 221 is a disc with a diameter greater than the diameter of the connecting rod 222, and the limiting member is a plurality of limiting grooves 1114 distributed at intervals at the bottom of the slide groove 1112. The diameters of the mounting hole 1111 and the limiting groove 1114 are greater than the diameter of the connecting seat 221, the width of the slide groove 1112 is greater than the diameter of the connecting rod 222, and smaller than the diameter of the connecting seat 221. Under external force, the connecting rod 222 can slide freely in the slide groove 1112. After the external force is removed, under the tightening force of the safety belt, the connecting seat 221 is engaged in the corresponding limiting groove 1114.

[0046] Specifically, the diameters of the mounting hole 1111 and the limiting groove 1114 are larger or slightly larger (larger by 0.5-3 mm) than the diameter of the connecting seat 221, so that the connecting seat 221 can smoothly pass through the mounting hole 1111 and smoothly enter the limiting groove 1114; the width of the slide groove 1112 is larger or slightly larger (larger by 0.5-2 mm) than the diameter of the connecting rod 222, and smaller than the diameter of the connecting seat 221, so that the width of the slide groove 1112 is adapted to the diameter of the connecting rod 222, so that when the connecting seat 221 is When the connecting rod 222 is separated from the limiting groove 210, it can slide freely and smoothly in the sliding groove 1112; the thickness of the limiting groove 1114 is smaller than the thickness of the sliding groove 1112, so that the connecting seat 221 can be fixed in the limiting groove 1114 at the bottom of the sliding groove 1112; the length (axial length) of the connecting rod 222 is greater than the thickness of the connecting part 200 (or the depth of the sliding groove 1112), so that when the safety belt connecting device 200 moves along the axial direction of the connecting rod 222, the connecting seat 221 can smoothly enter or exit the limiting groove 1114.

[0047] When the safety belt connecting device 200 needs to be fixed on the U-shaped connecting portion 110, first, the connecting seat 221 is passed through the mounting hole 1111 on the horizontal bottom surface 111, and then an external force is applied to make the connecting rod 222 slide freely forward and backward in the slide groove 1112. When the connecting rod 222 slides to the limiting groove 1114 at a suitable position according to the body shape of the passenger, the external force is removed and the safety belt connecting device 200 is tightened upward, so that the connecting seat 221 is against the limiting groove 1114 at the bottom of the slide groove 1112. 21 is adapted to the size of the limit groove 1114 and is larger than the width of the slide groove 1112. At this time, under the action of the tensioning force of the safety belt itself, the connecting seat 221 is clamped in the limit groove 1114, and the connecting rod 222 cannot slide in the slide groove 1112, thereby playing the role of fixing the safety belt connecting device 200. Since the safety belt itself also has a tensioning force, the connecting seat 221 will not automatically separate from the limit groove 1114 under the action of gravity, thereby realizing the locking and fixation of the safety belt connecting device 200 and the connecting part 200.

[0048] The other parts of this embodiment are the same as those of the first embodiment.

[0049] Embodiment three: Other aspects are the same as those of Embodiment 1 or Embodiment 2, such as Fig.13 As shown, the difference is that the seat cushion base plate 100 is integrally formed to approximate the curve of the human buttocks, the middle part of the seat cushion base plate 100 bulges upward between the two legs to form a first bulge 170 and the outer sides of the two legs bulge upward to form a second bulge 180 with a hollow bottom, and the seat cushion base plate 100 is formed in the shape of the human buttocks with three sides bulging upward and the front part of the base plate being concave along the thigh. The first protrusion 170 forms a U-shaped connection portion 110, and the U-shaped connection portion 110 includes a horizontal bottom surface 111, a U-shaped inner side surface 113 and a U-shaped outer side surface 114. The horizontal bottom surface 111 is connected to the U-shaped inner side surface 113 to form a U-shaped space together. The position of the horizontal bottom 111 is higher than the seat cushion base plate 100 on both sides of the U-shaped connection portion, so that a hollow structure is formed below the U-shaped connection portion; the seat cushion base plate 100 is provided with an upward second protrusion 180 at the position outside the two legs, and a safety structure fixing belt or ISOFIX hard interface connector 181 is installed below the second protrusion 180, which can be detachably connected to the ISOFIX interface of the child safety seat fixing system.

[0050] The above embodiments are only used to illustrate the present invention, but not to limit the present invention. Although the present invention is described in detail with reference to the embodiments, it should be understood by those skilled in the art that various combinations, modifications or equivalent substitutions of the technical solutions of the present invention do not depart from the spirit and scope of the technical solutions of the present invention, and should be included in the scope of the claims of the present invention.

Claims

1. A safety structure for a seat, the seat comprising a seat belt, characterized in that: The safety structure includes: The seat cushion base is a plate-like structure arranged on the seat and used to bear weight. The front end of the seat cushion base is located between the two legs and has a U-shaped connecting portion integrally formed with the seat cushion base. The U-shaped connecting portion includes a horizontal bottom surface, a U-shaped inner side surface and a U-shaped outer side surface. The U-shaped outer side surface is integrally formed with the seat cushion base on both sides thereof. The horizontal bottom surface is connected to the U-shaped inner side surface to form a U-shaped space. The position of the horizontal bottom surface is higher than the seat cushion base on both sides of the U-shaped connecting portion, so that a hollow structure is formed below the U-shaped connecting portion. A safety belt connecting device, comprising a first connecting end for connecting to the safety belt and a second connecting end capable of connecting to the U-shaped connecting portion in the U-shaped space; A cushioning layer wraps the seat cushion substrate to form a seat cushion; and The anti-collision protection pad is arranged on the seat cushion base plate on the side of the U-shaped connecting part close to the user, and is used to restrain the safety belt so that the safety belt forms surface contact with the user's thigh root and lower abdomen bottom to prevent the side of the safety belt from cutting the user.

2. A safety structure for a seat according to claim 1, characterized in that: The middle part of the seat cushion substrate is formed by stamping or casting, forging, 3D printing, machining, injection molding, selective laser melting, selective laser sintering, metal deposition, blow molding, injection molding, calendering, vacuum forming, compression molding, lamination, thermoforming, vacuum forming, rotational molding, RTM molding, autoclave molding, oven molding, extrusion molding, compression molding, molding, pultrusion, fiber winding molding, spray molding and contact molding process or by a one-time molding process to form the U-shaped connecting part.

3. A safety structure for a seat according to claim 2, characterized in that: The depth of the U-shaped inner side surface is not less than the height of the safety belt connecting device, so that the U-shaped inner side surface and the U-shaped outer side surface surround and protect the safety belt connecting device connected to the U-shaped connecting part.

4. A safety structure for a seat according to claim 3, characterized in that: The U-shaped connecting portion also includes a top surface, and the connection between the top surface and the U-shaped inner side surface and the U-shaped outer side surface is configured as a smooth rounded corner connection, and the U-shaped inner side surface and the U-shaped outer side surface are both three-sided sloped and gradually convex shapes.

5. A safety structure for a seat according to claim 1, characterized in that: The seat cushion base plate is provided with an upward protrusion at the outer side of the two legs, a clamping sleeve is installed under the protrusion, two ends of the clamping sleeve are respectively fixed to the bottom of the seat cushion base plate and the end of the protrusion, and a hollow structure installation groove is formed under the protrusion.

6. A safety structure for a seat according to claim 5, characterized in that: A length-adjustable connection component is installed in the installation groove, and the connection component can pass through the rear of the seat cushion base plate and be detachably connected to the ISOFIX interface of the child safety seat fixing system.

7. A safety structure for a seat according to claim 1, characterized in that: The second connecting end includes a connecting seat and a connecting rod whose two ends are respectively fixed on the connecting seat and the first connecting end; a mounting hole and a plurality of limit members connected by a slide groove are provided on the horizontal bottom surface of the U-shaped connecting portion; the connecting seat can pass through the mounting hole; the connecting rod can slide freely in the slide groove; and when sliding to a suitable position, the connecting seat is clamped and fixed by the limit members.

8. A safety structure for a seat according to claim 7, characterized in that: The connecting rod is a cylindrical rod with two opposite surfaces cut into planes, the connecting seat is a disk with a diameter larger than the diameter of the arc surface of the connecting rod, and the limiting member is a plurality of limiting holes spaced apart and distributed on the horizontal bottom surface; The width of the slide groove is greater than the distance between the two planes of the connecting rod and smaller than the diameter of the arc surface. The size of the limiting hole is greater than the diameter of the arc surface of the connecting rod and smaller than the diameter of the connecting seat, so that the connecting rod can slide freely in the slide groove in two plane directions, and when the limiting hole rotates to the width of the arc surface under the action of external force, it is clamped in the limiting hole.

9. A safety structure for a seat according to claim 7, characterized in that: The connecting rod is a cylindrical rod with a length greater than the depth of the chute, the connecting seat is a disc with a diameter greater than the diameter of the connecting rod, and the limiting member is a plurality of limiting grooves spaced apart at the bottom of the chute.

10. A safety structure for a seat according to claim 9, characterized in that: The diameters of the mounting hole and the limiting groove are larger than the diameter of the connecting seat, the width of the sliding groove is larger than the diameter of the connecting rod and smaller than the diameter of the connecting seat. Under external force, the connecting rod can slide freely in the sliding groove. After the external force is removed, the connecting seat is engaged in the corresponding limiting groove under the tightening force of the seat belt.

11. A safety structure for a seat according to claim 1, characterized in that: A height adjustment pad is installed below the seat cushion base plate through a connecting piece, and the connecting piece is a connecting hole, a connecting groove or a connecting block arranged on the seat cushion base plate.

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