Protection device and method for vehicle seat table plate

Abstract

The invention discloses a vehicle seat table board protection device and method, the vehicle seat table board protection device comprises a table board rotationally arranged on the rear side of a seat and an air bag arranged on the outer periphery of the table board, the air bag is inflated and unfolded outwards from the outer periphery of the table board, and the unfolded air bag is distributed around the outer periphery of the upper surface of the table board. According to the protection device of the vehicle seat table board in the scheme, when a vehicle is suddenly stopped or collided due to a traffic accident, on one hand, articles on the tabletop of the table board are protected, and damage such as collision to target passengers on the table board caused by uncontrollable accelerated flying and falling of the articles is prevented; on the other hand, a target passenger on the table board is protected, and strong collision between the outer periphery of the table board and the target passenger on the table board is prevented.

Description

Technical Field

[0001] The present invention relates to the technical field of vehicle safety, and in particular to a protective device for a vehicle seat table board and a method thereof. Background Art

[0002] As the pace of contemporary life accelerates, people's needs for makeup, study, and work in the car are also increasing. For this reason, some vehicles have been equipped with tables that can be opened and folded for storage behind the seats. And with the increasing popularity of vehicles, road traffic accidents are also increasing. Due to various reasons such as the driver's unskilled driving skills, poor driving conditions, and irregular driving behavior, traffic accidents may occur. In a traffic accident, the vehicle stops suddenly or collides, causing the items on the table to scatter and cause collisions and other injuries to the target occupants of the table.

[0003] For example, Chinese patent publication number CN113401028A, publication date September 17, 2021, named "Rear table for vehicle seats and vehicle seat", includes a table body, including a first plate body and a second plate body relatively arranged to define a plate-shaped cavity, the first plate body is located above the second plate body when the rear table board is in an open state, the first plate body includes at least one hollow area and at least one lampshade corresponding to the at least one hollow area; and, at least one fill light board fixed in the plate-shaped cavity, the light emission direction of the at least one fill light board corresponds to the aforementioned at least one lampshade.

[0004] The disadvantage of the existing patent is that in a traffic accident, the vehicle stops suddenly or collides, causing the items on the table behind the seat to scatter and cause damage such as collision to the target occupant on the table. Summary of the invention

[0005] The purpose of the present invention is to solve the problem that items on the table top of existing vehicle seat tables may scatter and cause impact injuries to the target occupants of the table top when the vehicle stops suddenly or collides, and to provide a protective device and method for vehicle seat tables that improve the safety of use of vehicle seat tables.

[0006] In order to achieve the above object, the present invention adopts the following technical solutions: A protective device for a vehicle seat table top includes a table top that is rotatably arranged at the rear side of the seat and an airbag arranged at the outer periphery of the table top. The airbag is inflated and deployed outward from the outer periphery of the table top. The deployed airbag is distributed around the outer periphery of the upper surface of the table top. The protective device for a vehicle seat table top described in this solution, when the vehicle stops suddenly or collides in a traffic accident, on the one hand, protects items on the table top to prevent the items from uncontrollably accelerating and flying and falling, causing damage to the target occupant of the table top; on the other hand, it protects the target occupant of the table top to prevent a strong collision between the outer periphery of the table top and the target occupant of the table top. When the airbag is not inflated, it is folded and stored at the outer periphery of the table board. The inflation port of the airbag is fixedly set on the outer periphery of the table board. When the vehicle stops or is predicted to stop suddenly or collide, the airbag is inflated and deployed outward from the outer periphery of the table board. The deployed airbag is distributed around the outer periphery of the upper surface of the table board. A receiving groove for accommodating items is formed between the deployed airbag and the upper surface of the table board. The items are confined in the receiving groove by the inflated airbag to prevent the items from changing their motion state when the vehicle changes speed and scattering to cause harm to the target occupants of the table board. The inflated airbag can also play a safety protection role for the target occupants of the table board to prevent the table board from causing serious impact on the target occupants of the table board when it is deployed.

[0007] As a preferred method, it further comprises a gas generator connected to the airbag, the gas generator comprises a reaction chamber and a storage chamber, a storage box is slidably arranged in the storage chamber, the reaction chamber is filled with a reactant for primary inflation, the storage box is divided into compartments and filled with reactants for secondary inflation and reactants for compensatory inflation, the storage chamber is connected to the airbag, the airbag is inflated once and pushes the storage box, so that the reactants for secondary inflation and reactants for compensatory inflation in the storage box enter the reaction chamber in sequence, and a control mechanism for controlling the compensatory inflation of the storage box is arranged on the storage chamber. The gas generator is arranged in the vehicle, and can be arranged under the seat, the airbag is connected to the gas generator through a conduit, the reaction chamber is provided with an inflation port connected to the conduit, and the gas generator is used to inflate the airbag. An ignition device is arranged in the gas generator, the ignition device comprises a fire transfer chamber arranged in the reaction chamber and an igniter arranged in the fire transfer chamber, and the fire transfer chamber is filled with fire transfer powder. The fire transfer chamber is connected to the reaction chamber through a fire transfer hole, and an aluminum foil is arranged on the inner side of the fire transfer hole to prevent the fire transfer powder from entering the reaction chamber in an unignited state.

[0008] Based on the occupant's seat belt information, the vehicle impact area, the vehicle impact force and the predicted vehicle impact time, the table board causes different levels of damage to the target occupant of the table board. Therefore, it is necessary to set different protection levels for the protective device of the table board to meet the protection of different levels of damage. In this technical solution, the airbag is controlled to perform primary inflation, secondary inflation and compensatory inflation to meet the protection of different levels of damage.

[0009] Among them, the airbag after one inflation meets the basic protection of the table board, which can effectively prevent the scattered items on the table board from causing harm to the target occupants of the table board, and reduce the impact damage to the target occupants of the table board when the vehicle is slightly hit; the airbag after the second inflation further improves the protection level of the airbag on the basis of basic protection, and the second inflation is an action that must occur after the first inflation occurs. The pressure generated by the airbag after the first inflation is connected to the storage chamber through the air duct, and the storage chamber is provided with an air inlet connected to the air duct. The gas generated by the first inflation pushes the storage box after filling the airbag to make the reaction chamber second inflation. While improving the protective effect of the airbag, the airbag can also disperse the impact force more evenly to prevent the airbag from inflating and expanding all at once and causing secondary damage to the target occupants of the table board; the compensatory inflation is used when the vehicle is seriously hit or predicted to be seriously hit, to prevent the table board from causing serious impact to the target occupants of the table board when it is deployed, especially when the occupants of the table board are not wearing seat belts, and the sudden stop or collision of the vehicle is likely to cause impact damage to the target occupants of the table board.

[0010] The primary inflation and secondary inflation respond to the type of collision being an unavoidable collision, and the compensating inflation controls its opening and the timing of the opening based on the impact force of the table top, and the impact force of the table top is predicted based on seat belt information, impact area and impact force.

[0011] The storage chamber is connected to the reaction chamber through a feed port. In the initial state, the outer wall of the storage box covers the feed port to prevent the reactant in the storage box from entering the reaction chamber. After the airbag is inflated, the gas pushes the storage box to move in the storage chamber, so that the secondary-inflated reactant and the compensatory-inflated reactant in the storage box enter the reaction chamber in sequence. The secondary-inflated reactant and the compensatory-inflated reactant are distributed along the moving direction of the storage box in the storage chamber.

[0012] Preferably, the control mechanism includes a chute provided on the outer wall of the storage box and a driving rod that cooperates with the chute to limit the moving distance of the storage box, and the driving rod is driven by a driving motor provided outside the storage chamber. When compensation inflation is not required, the driving motor drives the driving rod to extend into the chute, and when the storage box moves, the end of the driving rod slides relative to the chute, and the reaction chamber is controlled to only undergo one and two inflations; when additional inflation is required, the driving motor drives the driving rod to extend into the chute, and when the storage box moves, the driving rod does not restrict the storage box, and the reactants of the second inflation and the compensatory inflation in the storage box enter the reaction chamber in sequence. The time of compensation inflation is achieved by controlling the driving motor.

[0013] Preferably, the storage box is pressed against the inner wall of the storage cavity by an elastic member, and the airbag is connected to the storage cavity by an air duct, so as to push the storage box to move in the storage cavity, and the air duct and the elastic member are respectively located at the two ends of the storage box. The selection of the stiffness of the elastic member is related to the pressure of the primary inflation in the airbag, that is, the stiffness of the elastic member is related to the dosage of the reactant of the primary inflation. The ignition device in the reaction chamber is ignited, and the reactant of the primary inflation produces gas, which enters the airbag through the catheter. After the airbag is evenly filled with gas, it enters the storage cavity through the air duct to push the storage box. Under the driving action of the gas, the storage box slowly pushes the reactant of the secondary inflation into the reaction cavity to realize the secondary inflation, and the interval time between the secondary inflation and the primary inflation is controlled by the elastic member. The thrust required for the storage box during the secondary inflation comes from the airbag, rather than directly connecting to the reaction cavity, to prevent the instantaneous pressure caused by the primary inflation in the reaction cavity from making the effect of the secondary inflation inconspicuous, and at the same time, the gas effectively and evenly fills the airbag.

[0014] Preferably, a support is provided at the rear side of the seat, the table top is rotatably arranged at the rear side of the seat through the support, and a motor pretensioner is provided between the support and the table top. The motor pretensioner pretensions the table top in response to an unavoidable impact. A collision alarm sounder is also provided in the table top.

[0015] Preferably, when the table board is stored, it rotates downward; when the table board is anti-collision, it rotates upward. Since the storage space behind the seat is limited and in order to meet the height of the target occupant of the table board, the table board is arranged at the upper part of the rear side of the seat. Therefore, when the table board is stored, it needs to be rotated downward to prevent the table board from affecting the space above the seat; and when the type of impact is unavoidable, the table board rotates upward, on the one hand to prevent the items on the table board from falling, and on the other hand to prevent the table board from rotating downward to cause collision with the hands and legs of the target occupant of the table board.

[0016] As a preference, it also includes: a first determination module, the first determination module determining the type of collision between the vehicle and the suspected collision object based on the motion information of the vehicle, the motion information of the suspected collision object, and the distance between the vehicle and the suspected collision object; a second determination module, the second determination module determines the seat belt information of the target occupant of the table; a first prediction module, wherein the first prediction module predicts an impact area and impact strength of the suspected impact object on the vehicle based on the motion information of the vehicle, the motion information of the suspected impact object, and the distance between the vehicle and the suspected impact object in response to the type of the impact being an unavoidable collision according to the result determined by the first determination module; a second prediction module, wherein the second prediction module predicts the impact force of the table top on the target occupant based on the seat belt information, the impact area and the impact force, in response to the type of the collision being an unavoidable collision, according to the result determined by the second determination module and the result predicted by the first prediction module; The control module controls the protective device of the table top to perform safety protection by comparing the impact force of the table top with the set threshold.

[0017] A method for protecting a vehicle seat table board, comprising: Determining the type of collision between the vehicle and the suspected collision object based on the motion information of the vehicle, the motion information of the suspected collision object, and the distance between the vehicle and the suspected collision object; In response to the type of collision being an unavoidable collision, predicting an impact area and impact strength of the suspected collision object on the vehicle; Determine seat belt information of target occupant on table; Predicting the impact force of the table board on the target occupant based on the seat belt information, the impact area and the impact force, and controlling the protection device of the table board to perform safety protection; Among them, the safety protection includes primary inflation and secondary inflation in response to the type of collision being an unavoidable collision, and also includes compensatory inflation based on the impact force of the table top being greater than a set threshold.

[0018] Based on the movement information of the vehicle, the movement information of the suspected collision object and the distance between the vehicle and the suspected collision object, the type of collision between the vehicle and the suspected collision object is determined; when the type of collision is responded to as an unavoidable collision, the protective device of the control table panel performs primary and secondary inflation safety protection.

[0019] The impact force of the table top on its target occupant is predicted based on the seat belt information, the impact area and the impact force. When the impact force of the table top is greater than a set threshold, the protective device of the table top performs compensatory inflation safety protection.

[0020] The vehicle motion information includes the vehicle's motion speed and motion direction, the suspected impact vehicle's motion information includes the suspected impact vehicle's motion speed and motion direction, and the seat belt information includes whether the target occupant of the table is wearing a seat belt and the tightness of the seat belt. Based on the seat belt information, the impact area and the impact force, the impact force of the table on its target occupant is predicted, and it is determined whether the protective device of the table performs compensatory inflation and the time to perform compensatory inflation.

[0021] Preferably, it also includes: determining the time interval between the table top protective device performing one inflation and performing compensatory inflation based on the impact force of the table top and the distance between the vehicle and the suspected impact object, and controlling the execution time of the compensatory inflation by the table top protective device. For example, when the predicted impact force of the table top on its target occupant obtained at different distances is the same, and the table top protective device is controlled to perform compensatory inflation for safety protection, the time to perform compensatory inflation is controlled based on the impact force of the table top and the distance between the vehicle and the suspected impact object. This more accurately improves the protection of the target occupant of the table top.

[0022] Preferably, it also includes: after determining the type of collision between the vehicle and the suspected collision object, confirming whether there is a target passenger on the table top, and in response to the presence of the target passenger on the table top, controlling the protective device of the table top to perform safety protection.

[0023] Therefore, the present invention has the following beneficial effects: protecting items on the table top, preventing the items from uncontrollably accelerating and scattering and falling, causing damage to the target occupants of the table; protecting the target occupants of the table, preventing strong collisions between the outer periphery of the table and the target occupants of the table. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a structural schematic diagram of the table top in the storage state of the present invention.

[0025] Figure 2 It is a structural schematic diagram of the table top in the open state in the present invention.

[0026] Figure 3 It is a cross-sectional view of the table top in the open state in the present invention.

[0027] Figure 4 It is a cross-sectional view of the gas generator in the present invention.

[0028] As shown in the figure: Seat 1, Table 2, Airbag 3, Gas generator 4, reaction chamber 4.1, charging port 4.1.1, feed port 4.1.2, storage chamber 4.2, air inlet 4.2.1, storage box 4.3, slide 4.3.1, elastic member 4.4, ignition device 4.5, Driving rod 5, motor pretensioner 6, and guide tube 7. DETAILED DESCRIPTION

[0029] In order to make the purpose, technical scheme and advantages of the technical solution embodiments of the present invention clearer, the present invention is further described below in conjunction with the accompanying drawings and specific implementation methods.

[0030] Embodiment 1, as Figure 1 , Figure 2 , Figure 3The protective device for the table top 2 of a vehicle seat 1 shown in the figure includes a table top 2 rotatably arranged at the rear side of the seat 1 and an airbag 3 arranged at the outer periphery of the table top 2. The airbag 3 is inflated and expanded outward from the outer periphery of the table top 2. The expanded airbag 3 is distributed around the outer periphery of the upper surface of the table top 2.

[0031] As the pace of contemporary life accelerates, people's needs for makeup, study, and work in the car are also increasing. For this reason, some vehicles have been equipped with a table 2 that can be opened and folded for storage on the rear side of the seat 1. And with the increasing popularity of vehicles, road traffic accidents are also increasing. Due to various reasons such as the driver's unskilled driving skills, poor driving conditions, and irregular driving behavior, traffic accidents may occur. In daily traffic accidents, the vehicle stops suddenly or collides, causing the items on the table 2 to scatter and cause collisions and other injuries to the target occupants of the table 2.

[0032] In order to solve the problem that items on the table top 2 of the existing vehicle seat 1 may scatter and cause collision injuries to the target occupant of the table top 2 when the vehicle stops suddenly or collides, a protective device and method for the vehicle seat 1 table top 2 are provided to improve the safety of use of the vehicle seat 1 table top 2.

[0033] like Figure 1 , Figure 2 , Figure 3 , Figure 4 As shown, the protective device of the table board 2 of a vehicle seat 1 described in the above embodiment protects the items on the table board 2 when the vehicle stops suddenly or collides due to a traffic accident, on the one hand, to prevent the items from uncontrollably accelerating and flying and falling, causing damage to the target occupant of the table board 2; on the other hand, to protect the target occupant of the table board 2, to prevent a strong collision between the outer periphery of the table board 2 and the target occupant of the table board 2. When the airbag 3 is not inflated, it is folded and stored in the outer periphery of the table board 2. The inflation port 4.1.1 of the airbag 3 is fixedly set on the outer periphery of the table board 2. When the vehicle stops suddenly or collides or is predicted to stop suddenly or collides, the airbag 3 is inflated and unfolded outward from the outer periphery of the table board 2. The unfolded airbag 3 is distributed around the outer periphery of the upper surface of the table board 2. The unfolded airbag 3 and the upper surface of the table board 2 form a receiving groove for accommodating items. The items are confined in the receiving groove by the inflated airbag 3, to prevent the items from changing their motion state when the vehicle changes speed, and the items from scattering and causing damage to the target occupant of the table board 2. The inflated airbag 3 can also provide safety protection for the target occupant of the table board 2 , preventing the table board 2 from causing a serious impact on the target occupant of the table board 2 when it is deployed.

[0034] The present invention has the following beneficial effects: protecting items on the table top of table board 2, preventing the items from uncontrollably accelerating and flying and falling, causing damage such as collision to the target occupant of table board 2; protecting the target occupant of table board 2, preventing a strong collision between the outer periphery of table board 2 and the target occupant of table board 2.

[0035] Embodiment 2, as Figure 1 , Figure 2 , Figure 3 , Figure 4 The protective device for the table top 2 of a vehicle seat 1 shown in the figure comprises a table top 2 rotatably arranged at the rear side of the seat 1 and an air bag 3 arranged at the outer periphery of the table top 2. The air bag 3 is inflated and deployed outward from the outer periphery of the table top 2. The deployed air bag 3 is distributed around the outer periphery of the upper surface of the table top 2. Figure 1 , Figure 2 , Figure 3 , Figure 4 As shown, it also includes a gas generator 4 connected to the airbag 3, the gas generator 4 includes a reaction chamber 4.1 and a storage chamber 4.2, a storage box 4.3 is slidably arranged in the storage chamber 4.2, the reaction chamber 4.1 is filled with a reactant for primary inflation, the storage box 4.3 is divided into compartments to fill reactants for secondary inflation and reactants for compensatory inflation, the storage chamber 4.2 is connected to the airbag 3, the airbag 3 is inflated once and pushes the storage box 4.3, so that the reactants for secondary inflation and reactants for compensatory inflation in the storage box 4.3 enter the reaction chamber 4.1 in sequence, and the storage chamber 4.2 is provided with a control mechanism for controlling the compensatory inflation of the storage box 4.3. The gas generator 4 is arranged in the vehicle, and can be arranged under the seat 1, the airbag 3 is connected to the gas generator 4 through a conduit 7, the reaction chamber 4.1 is provided with an inflation port 4.1.1 connected to the conduit 7, and the gas generator 4 is used to inflate the airbag 3. The gas generator 4 is provided with an ignition device 4.5, which includes a fire transfer chamber arranged in the reaction chamber 4.1 and an igniter arranged in the fire transfer chamber, and the fire transfer chamber is filled with fire transfer powder. The fire transfer chamber is connected to the reaction chamber 4.1 through a fire transfer hole, and an aluminum foil is arranged inside the fire transfer hole to prevent the fire transfer powder from entering the reaction chamber 4.1 in an unignited state.

[0036] The protective device for the table top 2 of a vehicle seat 1 described in the above embodiment is as follows: Figure 1 , Figure 2 , Figure 3 , Figure 4As shown, when a vehicle stops suddenly or collides due to a traffic accident, on the one hand, the items on the tabletop 2 are protected to prevent the items from uncontrollably accelerating and flying and falling, causing damage to the target occupant of the tabletop 2; on the other hand, the target occupant of the tabletop 2 is protected to prevent a strong collision between the outer periphery of the tabletop 2 and the target occupant of the tabletop 2. When the airbag 3 is not inflated, it is folded and stored in the outer periphery of the tabletop 2. The inflation port 4.1.1 of the airbag 3 is fixedly set on the outer periphery of the tabletop 2. When the vehicle stops suddenly or collides or is predicted to stop suddenly or collides, the airbag 3 is inflated and deployed outward from the outer periphery of the tabletop 2. The deployed airbag 3 is distributed around the outer periphery of the upper surface of the tabletop 2. A receiving groove for accommodating items is formed between the deployed airbag 3 and the upper surface of the tabletop 2. The items are confined in the receiving groove by the inflated airbag 3 to prevent the items from changing their motion state when the vehicle changes speed, and the items from scattering and causing damage to the target occupant of the tabletop 2. The inflated airbag 3 can also provide safety protection for the target occupant of the table board 2 , preventing the table board 2 from causing a serious impact on the target occupant of the table board 2 when it is deployed.

[0037] Based on the occupant's seat belt information, the vehicle impact area, the vehicle impact force and the predicted vehicle impact time, the table board 2 causes different levels of damage to the target occupant of the table board 2. Therefore, it is necessary to set different protection levels for the protective device of the table board 2 to meet the protection of different levels of damage. In this technical solution, the airbag 3 is controlled to perform primary inflation, secondary inflation and compensatory inflation to meet the protection of different levels of damage.

[0038] Among them, the airbag 3 after one inflation meets the basic protection of the table top 2, which can effectively prevent the items on the table top 2 from scattering and causing harm to the target occupant of the table top 2, and reduce the impact damage of the vehicle to the target occupant of the table top 2 during a slight collision; the airbag 3 after the second inflation further improves the protection level of the airbag 3 on the basic protection, and the secondary inflation is an action that must occur after the first inflation occurs. The pressure generated after the airbag 3 is inflated once is connected to the storage chamber 4.2 through the air duct, and the storage chamber 4.2 is provided with an air inlet 4.2.1 connected to the air duct. The gas generated by the first inflation pushes the storage box 4.3 after filling the airbag 3, so that the reaction chamber 4.1 is inflated for the second time. While improving the protective effect of the airbag 3, the airbag 3 can also disperse the impact force more evenly to prevent the airbag 3 from inflating and deploying all at once to cause secondary damage to the target occupant of the table board 2; the compensatory inflation is used when the vehicle collides severely or predicts a severe vehicle collision to prevent the table board 2 from causing severe impact to the target occupant of the table board 2 during deployment, especially when the occupant of the table board 2 is not wearing a seat belt, the vehicle may cause impact damage to the target occupant of the table board 2 in an emergency stop or collision.

[0039] The primary inflation and secondary inflation respond to the type of collision as unavoidable collision, and the compensating inflation controls the opening and the opening time based on the impact force of the table top 2, and the impact force of the table top 2 is predicted based on the seat belt information, the impact area and the impact force.

[0040] The storage chamber 4.2 is connected to the reaction chamber 4.1 through the feed port 4.1.2. In the initial state, the outer wall of the storage box 4.3 covers the feed port 4.1.2 to prevent the reactants in the storage box 4.3 from entering the reaction chamber 4.1. After the airbag 3 is inflated, the gas pushes the storage box 4.3 to move in the storage chamber 4.2, so that the secondary-inflated reactants and the compensatory-inflated reactants in the storage box 4.3 enter the reaction chamber 4.1 in sequence. The secondary-inflated reactants and the compensatory-inflated reactants are distributed along the moving direction of the storage box 4.3 in the storage chamber 4.2.

[0041] Further optimization of the control mechanism, such as Figure 1 , Figure 2 , Figure 3 , Figure 4 As shown, the control mechanism includes a chute 4.3.1 arranged on the outer wall of the storage box 4.3 and a driving rod 5 that cooperates with the chute 4.3.1 to limit the moving distance of the storage box 4.3, and the driving rod 5 is driven by a driving motor arranged outside the storage chamber 4.2. When compensation inflation is not required, the driving motor drives the driving rod 5 to extend into the chute 4.3.1, and when the storage box 4.3 moves, the end of the driving rod 5 slides relative to the chute 4.3.1, and the reaction chamber 4.1 is controlled to only have one inflation and two inflations; when additional inflation is required, the driving motor drives the driving rod 5 to extend into the chute 4.3.1, and when the storage box 4.3 moves, the driving rod 5 does not restrict the storage box 4.3, and the reactants of the second inflation and the reactants of the compensation inflation in the storage box 4.3 enter the reaction chamber 4.1 in sequence. The time of compensation inflation is achieved by controlling the driving motor.

[0042] Further optimization of storage box 4.3, such as Figure 1 , Figure 2 , Figure 3 , Figure 4As shown, the storage box 4.3 is pressed against the inner wall of the storage chamber 4.2 by the elastic member 4.4, and the airbag 3 is connected to the storage chamber 4.2 by the air guide tube, so as to push the storage box 4.3 to move in the storage chamber 4.2, and the air guide tube and the elastic member 4.4 are respectively located at the two ends of the storage box 4.3. The selection of the stiffness of the elastic member 4.4 is related to the pressure of the primary inflation in the airbag 3, that is, the stiffness of the elastic member 4.4 is related to the dosage of the reactant of the primary inflation. The ignition device 4.5 in the reaction chamber 4.1 is ignited, and the reactant of the primary inflation produces gas, which enters the airbag 3 through the conduit 7. After the airbag 3 is evenly filled with gas, it enters the storage chamber 4.2 through the air guide tube to push the storage box 4.3. Under the driving action of the gas, the storage box 4.3 slowly pushes the reactant of the secondary inflation into the reaction chamber 4.1 to realize the secondary inflation, and the interval time between the secondary inflation and the primary inflation is controlled by the elastic member 4.4. During the secondary inflation process, the thrust required by the storage box 4.3 comes from the airbag 3 instead of being directly connected to the reaction chamber 4.1, so as to prevent the instantaneous pressure caused by the primary inflation in the reaction chamber 4.1 from making the secondary inflation effect insignificant, and at the same time make the gas effectively and evenly fill the airbag 3.

[0043] The seat 1 is further optimized, such as Figure 1 , Figure 2 , Figure 3 , Figure 4 As shown, a support is provided at the rear side of the seat 1, and the table board 2 is rotatably arranged at the rear side of the seat 1 through the support, and a motor preload 6 is provided between the support and the table board 2. The motor preload 6 preloads the table board 2 in response to an inevitable collision. A collision alarm sounder is also provided in the table board 2. When the table board 2 is stored, the table board 2 rotates downward; when the table board 2 is anti-collision, the table board 2 rotates upward. Since the storage space at the rear side of the seat 1 is limited, and in order to meet the use height of the target occupant of the table board 2, the table board 2 is arranged at the upper part of the rear side of the seat 1. Therefore, when the table board 2 is stored, it is necessary to rotate the table board 2 downward to prevent the table board 2 from affecting the upper space of the seat 1; and when the collision type is inevitable, the table board 2 rotates upward, on the one hand, to prevent the items on the table board 2 from falling, and on the other hand, to prevent the table board 2 from rotating downward and causing collision with the hands and legs of the target occupant of the table board 2.

[0044] The present invention has the following beneficial effects: protecting items on the table top of table board 2, preventing the items from uncontrollably accelerating and flying and falling, causing damage such as collision to the target occupant of table board 2; protecting the target occupant of table board 2, preventing a strong collision between the outer periphery of table board 2 and the target occupant of table board 2.

[0045] Embodiment three, as Figure 1 , Figure 2 , Figure 3 , Figure 4As shown, a protective device for a table top 2 of a vehicle seat 1 includes a table top 2 rotatably arranged at the rear side of the seat 1 and an airbag 3 arranged at the outer periphery of the table top 2. The airbag 3 is inflated and deployed outward from the outer periphery of the table top 2. The deployed airbag 3 is distributed around the outer periphery of the upper surface of the table top 2. It also includes: a first determination module, the first determination module determining the type of collision between the vehicle and the suspected collision object based on the motion information of the vehicle, the motion information of the suspected collision object, and the distance between the vehicle and the suspected collision object; A second determination module, the second determination module determines the seat belt information of the target occupant of the table board 2; a first prediction module, wherein the first prediction module predicts an impact area and impact strength of the suspected impact object on the vehicle based on the motion information of the vehicle, the motion information of the suspected impact object, and the distance between the vehicle and the suspected impact object in response to the type of the impact being an unavoidable collision according to the result determined by the first determination module; a second prediction module, which predicts the impact force of the table top 2 on the target occupant based on the seat belt information, the impact area and the impact force according to the result determined by the second determination module and the result predicted by the first prediction module, in response to the type of the collision being an unavoidable collision; The control module controls the protective device of the table top 2 to perform safety protection by comparing the impact force of the table top 2 with the set threshold.

[0046] The present invention has the following beneficial effects: protecting items on the table top of table board 2, preventing the items from uncontrollably accelerating and flying and falling, causing damage such as collision to the target occupant of table board 2; protecting the target occupant of table board 2, preventing a strong collision between the outer periphery of table board 2 and the target occupant of table board 2.

[0047] A method for preventing a vehicle seat 1 table board 2 from being hit, using any one of the protective devices for the vehicle seat 1 table board 2 in the first or second embodiment, the protective method comprising: Determining the type of collision between the vehicle and the suspected collision object based on the motion information of the vehicle, the motion information of the suspected collision object, and the distance between the vehicle and the suspected collision object; In response to the type of collision being an unavoidable collision, predicting an impact area and impact strength of the suspected collision object on the vehicle; Determine the seat belt information of the target occupant of table 2; Predicting the impact force of the table board 2 on the target occupant based on the seat belt information, the impact area and the impact force, and controlling the protection device of the table board 2 to perform safety protection; The safety protection includes primary inflation and secondary inflation in response to the type of collision being an unavoidable collision, and also includes compensatory inflation based on the impact force of the table top 2 being greater than a set threshold.

[0048] Based on the vehicle's motion information, the motion information of the suspected impact object, and the distance between the vehicle and the suspected impact object, the type of collision between the vehicle and the suspected impact object is determined; when the type of collision is determined to be an unavoidable collision, the protective device of the control table 2 performs primary and secondary inflation safety protection.

[0049] The impact force of the table top 2 on its target occupant is predicted based on the seat belt information, the impact area and the impact force. When the impact force of the table top 2 is greater than the set threshold, the protective device of the table top 2 performs compensatory inflation safety protection.

[0050] The vehicle motion information includes the vehicle's motion speed and motion direction, the suspected impact vehicle's motion information includes the suspected impact vehicle's motion speed and motion direction, and the seat belt information includes whether the target occupant of the table 2 is wearing a seat belt and the tightness of the seat belt. Based on the seat belt information, the impact area and the impact force, the impact force of the table 2 on its target occupant is predicted, and it is determined whether the protective device of the table 2 performs compensatory inflation and the time to perform compensatory inflation.

[0051] Furthermore, a method for preventing collision of a table top 2 of a vehicle seat 1 also includes: determining the time interval between the execution of one inflation and the execution of compensatory inflation by the protective device of the table top based on the impact force of the table top 2 and the distance between the vehicle and the suspected collision object, and controlling the execution time of the compensatory inflation by the protective device of the table top. For example, when the predicted impact force of the table top 2 on its target occupant obtained at different distances is the same value, and the protective device of the table top 2 is controlled to execute compensatory inflation for safety protection, the time for executing compensatory inflation is controlled based on the impact force of the table top 2 and the distance between the vehicle and the suspected collision object. The protection of the target occupant of the table top 2 is more accurately improved.

[0052] Furthermore, a collision avoidance method for a vehicle seat table 2 also includes: after determining the type of collision between the vehicle and the suspected collision object, confirming whether there is a target passenger on the table 2, and in response to the presence of the target passenger on the table 2, controlling the protective device of the table 2 to perform safety protection.

[0053] The specific embodiments described above are only preferred implementations of the present invention, and are not intended to limit the specific implementation scope of the present invention. All equivalent changes made according to the shape and structure of the present invention should be included in the protection scope of the present invention.

Claims

1. A protective device for a vehicle seat table, characterized in that: The invention comprises a table board rotatably arranged at the rear side of the seat and an air bag arranged at the outer periphery of the table board. The air bag is inflated and expanded outwards from the outer periphery of the table board. The expanded air bag is distributed around the outer periphery of the upper surface of the table board.

2. A protective device for a vehicle seat table according to claim 1, characterized in that: It also includes a gas generator connected to the airbag, the gas generator includes a reaction chamber and a storage chamber, a storage box is slidably provided in the storage chamber, the reaction chamber is filled with a reactant for primary inflation, and the storage box is divided into compartments filled with a reactant for secondary inflation and a reactant for compensatory inflation, the storage chamber is connected to the airbag, the airbag is inflated once and pushes the storage box, so that the reactant for secondary inflation and the reactant for compensatory inflation in the storage box enter the reaction chamber in sequence, and a control mechanism for controlling the compensatory inflation of the storage box is provided on the storage chamber.

3. A protective device for a vehicle seat table according to claim 2, characterized in that: The control mechanism comprises a slide groove arranged on the outer wall of the storage box and a driving rod cooperating with the slide groove to limit the moving distance of the storage box, and the driving rod is driven by a driving motor arranged outside the storage cavity.

4. A protective device for a vehicle seat table according to claim 2 or 3, characterized in that: The storage box is pressed against the inner wall of the storage cavity by an elastic member, and the airbag is connected to the storage cavity by an air guide tube, thereby pushing the storage box to move in the storage cavity. The air guide tube and the elastic member are respectively located at two ends of the storage box.

5. A protective device for a vehicle seat table according to claim 1, 2 or 3, characterized in that: A support is provided at the rear side of the seat, and the table top is rotatably arranged at the rear side of the seat through the support, and a motor pretensioner is provided between the support and the table top.

6. A protective device for a vehicle seat table according to claim 1, 2 or 3, characterized in that: When the table top is stored, the table top rotates downward; when the table top is anti-collision, the table top rotates upward.

7. A protective device for a vehicle seat table according to claim 1, 2 or 3, characterized in that: include: a first determination module, the first determination module determining the type of collision between the vehicle and the suspected collision object based on the motion information of the vehicle, the motion information of the suspected collision object, and the distance between the vehicle and the suspected collision object; a second determination module, the second determination module determines the seat belt information of the target occupant of the table; a first prediction module, wherein the first prediction module predicts an impact area and impact strength of the suspected impact object on the vehicle based on the motion information of the vehicle, the motion information of the suspected impact object, and the distance between the vehicle and the suspected impact object in response to the type of the impact being an unavoidable collision according to the result determined by the first determination module; a second prediction module, wherein the second prediction module predicts the impact force of the table top on the target occupant based on the seat belt information, the impact area and the impact force, in response to the type of the collision being an unavoidable collision, according to the result determined by the second determination module and the result predicted by the first prediction module; The control module controls the protective device of the table top to perform safety protection by comparing the impact force of the table top with the set threshold.

8. A protection method using the protection device of the vehicle seat table board according to any one of claims 1 to 7, characterized in that: include: Determining the type of collision between the vehicle and the suspected collision object based on the motion information of the vehicle, the motion information of the suspected collision object, and the distance between the vehicle and the suspected collision object; In response to the type of collision being an unavoidable collision, predicting an impact area and impact strength of the suspected collision object on the vehicle; Determine seat belt information of target occupant on table; Predicting the impact force of the table board on the target occupant based on the seat belt information, the impact area and the impact force, and controlling the protection device of the table board to perform safety protection; Among them, the safety protection includes primary inflation and secondary inflation in response to the type of collision being an unavoidable collision, and also includes compensatory inflation based on the impact force of the table top being greater than a set threshold.

9. The protection method of the protective device of the vehicle seat table board according to claim 8, characterized in that: Also includes: Based on the impact force of the table top and the distance between the vehicle and the suspected impact object, the time interval between the desktop protective device performing one inflation and performing compensatory inflation is determined, and the execution time of the desktop protective device for compensatory inflation is controlled.

10. The method for protecting a protective device for a vehicle seat table according to claim 8, characterized in that: include: After determining the type of collision between the vehicle and the suspected collision object, confirm whether there is a target passenger on the table top, and in response to the presence of the target passenger on the table top, control the protective device of the table top to perform safety protection.

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