Automobile seat front and back position recognition device and safety belt constraining force control system

Abstract

The invention relates to the field of automobile safety, in particular to an automobile seat front and back position recognition device and a safety belt restraining force control system. The recognition device is installed on the front portion of an upper sliding rail of the automobile seat and comprises a sensor and an L-shaped support, the first end of the L-shaped support is fixed to the top face of the upper sliding rail, and the second end of the L-shaped support is fixedly connected with the sensor. The sensor is located on the side of a sliding rail of the automobile seat. The sensor comprises a Hall chip and a magnet. The Hall chip is used for detecting magnetic field changes generated by the magnet. When the automobile seat is located in the rear position area, the space between the upper sliding rail and the magnet is shielded by the lower sliding rail; when the automobile seat is located in the front position area, the lower sliding rail moves out of the position between the upper sliding rail and the magnet. Therefore, when the automobile seat is in different position areas, the magnetic field generated by the magnet changes. The Hall chip is in signal connection with the whole vehicle safety controller, and the whole vehicle safety controller controls the constraining force of the seat safety belt based on signals from the Hall chip.

Description

Technical Field

[0001] The invention relates to the technical field of automobile safety, and in particular to a device for identifying the front and rear positions of automobile seats and a safety belt restraint force control system. Background Art

[0002] When a car collides head-on, the seat belts will restrain the passengers and the airbags will pop out. When a person hits the airbag, the person's chest is simultaneously subjected to the reaction force of the airbag and the restraint force of the seat belt, which can easily cause injury to the person's chest.

[0003] Since the time when the driver and occupants hit the airbag is related to the position of the seat, the position information of the seat is required to control the restraining force of the seat belt.

[0004] In view of the above problems, the inventors of the present invention finally obtained the present invention after a long period of research and practice. Summary of the invention

[0005] In order to solve at least one aspect of the above technical problems, the present invention provides a vehicle seat front and rear position recognition device and a seat belt restraint force control system.

[0006] The technical solution adopted by the present invention is:

[0007] On the one hand, a front and rear position recognition device for a car seat is provided, which is installed at the front part of the upper slide rail of the car seat, and the recognition device comprises a sensor, and the sensor is located at the side of the slide rail of the car seat; the sensor comprises a Hall chip and a magnet, and the Hall chip is used to detect the change of the magnetic field generated by the magnet;

[0008] When the car seat is located in the rearward position area, the upper slide rail and the magnet are blocked by the lower slide rail; when the car seat is located in the forward position area, the lower slide rail moves out from between the upper slide rail and the magnet;

[0009] Therefore, when the vehicle seat is in different position areas, the magnetic field generated by the magnet changes.

[0010] Furthermore, the vehicle seat front and rear position recognition device also includes an L-shaped bracket, a first end of the L-shaped bracket is fixed to the top surface of the upper slide rail, and a second end is fixedly connected to the sensor.

[0011] Furthermore, a mounting hole is provided on the top surface of the upper slide rail, and a clamping portion cooperating with the mounting hole is provided on the first end of the L-shaped bracket.

[0012] Furthermore, the sensor also includes a shell, and the Hall chip and the magnet are located in the shell.

[0013] Furthermore, when the car seat is located in a rearward position area, the distance between the side wall of the lower sliding rail and the sensor is 4.5±0.5 mm.

[0014] Furthermore, when the car seat is located in the front position area, the distance between the side wall of the upper slide rail and the sensor is 7.8±0.5 mm.

[0015] On the other hand, a seat belt restraint force control system is provided, comprising the above-mentioned vehicle seat front and rear position recognition device; the seat belt restraint force control system also includes a vehicle safety controller, the Hall chip is signal-connected to the vehicle safety controller, and the vehicle safety controller controls the restraint force of the seat belt based on the signal from the Hall chip.

[0016] Furthermore, when the magnetic flux detected by the Hall chip is less than a predetermined threshold, a seat forward signal is output to the vehicle safety controller; when the magnetic flux detected by the Hall chip is greater than the predetermined threshold, a seat backward signal is output to the vehicle safety controller.

[0017] Compared with the prior art, the beneficial effects of the present invention are:

[0018] The front and rear position identification device of the automobile seat of the present invention is directly installed on the upper plane of the upper rail, and does not need to provide an additional bracket interface. It has good versatility and can be used by directly opening a hole in the upper rail. The identification range can be adjusted by the position of the hole, and there is no need to make a lot of changes to the seat frame. There is no need to set up an additional metal receiver, and the lower sliding rail is directly used as a receiver, which saves costs, simplifies the structure, and further enhances versatility. The seat belt restraint force control system of the present invention controls the time for reducing the seat belt restraint force by collecting the front and rear position information of the seat, thereby ensuring the safety of the driver and passengers. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0020] Figure 1 A schematic diagram showing the overall arrangement of a vehicle seat front and rear position recognition device according to an embodiment of the present invention;

[0021] Figure 2 A schematic diagram showing the installation of a vehicle seat front and rear position recognition device according to an embodiment of the present invention;

[0022] Figure 3 A schematic diagram showing the three-dimensional position of the front and rear position recognition device of the automobile seat and the slide rail when the automobile seat is located in the rearward position area;

[0023] Figure 4 The figure shows the Y-axis position diagram of the sensor and the slide rail when the car seat is in the rearward position area;

[0024] Figure 5 A schematic diagram showing the three-dimensional position of the front and rear position recognition device of the automobile seat and the slide rail when the automobile seat is located in the front position area;

[0025] Figure 6 The diagram shows the Y-axis position of the sensor and the slide rail when the car seat is located in the front position area. DETAILED DESCRIPTION

[0026] The above and other technical features and advantages of the present invention are described in more detail below in conjunction with the accompanying drawings.

[0027] As used herein, the term "including" and its variations mean open inclusion, i.e., "including but not limited to". Unless otherwise stated, the term "or" means "and / or". The term "based on" means "based at least in part on". The terms "an example embodiment" and "an embodiment" mean "at least one example embodiment". The term "another embodiment" means "at least one additional embodiment". Other explicit and implicit definitions may also be included below.

[0028] In the description of the present invention, it is to be understood that the terms “center”, “longitudinal”, “lateral”, “length”, “width”, “thickness”, “up”, “down”, “front”, “back”, “left”, “right”, “vertical”, “horizontal”, “top”, “bottom”, “inside”, “outside”, “clockwise”, “counterclockwise”, “axial”, “radial”, “circumferential”, etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are only for the convenience of describing the present invention, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0029] like Figure 1 , Figure 2 As shown, the front and rear position recognition device 1 of the automobile seat of the present invention is installed on the guide rail 100 of the automobile seat. The seat body is fixed on the upper slide rail 101 through the connecting member 200, and the lower slide rail 102 is fixed on the vehicle floor. The upper slide rail 101 and the lower slide rail 102 are slidably matched, and the front and rear position of the seat body is adjusted by the sliding of the upper slide rail 101.

[0030] The lower slide rail 102 is open at the top, and its cross section is roughly U-shaped, and the upper ends of its two side walls are formed with a first bent portion opening downward. The upper slide rail 101 is open at the bottom, and its cross section is roughly inverted U-shaped, and the lower ends of its two side walls are formed with a second bent portion opening upward. The upper slide rail 101 is located in the opening of the lower slide rail 102, and the first bent portion and the second bent portion are slidably matched.

[0031] The front and rear position recognition device 1 of the automobile seat is installed in front of the upper slide rail 101 of the automobile seat. The front and rear position recognition device 1 of the automobile seat includes a sensor 12, and the sensor 12 is located on the side of the slide rail 100 of the automobile seat. The sensor 12 includes a Hall chip and a magnet. The Hall chip is used to detect the change of the magnetic field generated by the magnet. The Hall chip and the magnet are arranged in the sensor housing. The Hall chip is programmable. When the magnetic flux strength of the magnetic field in which the Hall chip is located reaches a certain threshold, different currents are output to the outside.

[0032] The vehicle seat front and rear position recognition device 1 further includes an L-shaped bracket 11, a first end of which is fixed to the top surface of the upper slide rail 101, and a second end of which is fixedly connected to the sensor 12. The top surface of the upper slide rail 101 is provided with a mounting hole 1011, and a first end of the L-shaped bracket 11 is provided with a clamping portion 13 that matches the mounting hole 1011. The L-shaped bracket 11 is clamped to the upper slide rail 101.

[0033] like Figure 3 , Figure 4 As shown, when the car seat is located in the rear position area, the upper slide rail 101 and the sensor 12 are blocked by the lower slide rail 102, that is, the magnet matches the lower slide rail 102. Since the lower slide rail 102 is close to the sensor, the magnetic field generated by the magnet is affected, and the Hall chip outputs a corresponding current signal to the safety controller.

[0034] Reference Figure 4 In a specific embodiment, when the seat is in the rearward position, the sensor 12 meets the lower slide rail 102 at a relatively small distance. Preferably, the Y-direction distance between the sensor 12 and the outer wall 102a of the lower slide rail 102 is 4.5±0.5 mm. At this time, the lower slide rail 102 affects the magnet inside the sensor 12, causing the magnetic flux of the magnetic field where the chip is located to increase and reach a set threshold, thereby causing the Hall chip inside the sensor 12 to output a current signal representing "rearward".

[0035] like Figure 5 , Figure 6 As shown, when the car seat is located in the front position area, the lower slide rail 102 moves out from between the upper slide rail 101 and the sensor 12, that is, the sensor 12 is separated from the lower slide rail 102, and the distance between the upper slide rail 101 and the sensor is far, which does not affect the magnetic field, and the Hall sensor outputs another current signal.

[0036] Reference Figure 6 In a specific embodiment, when the seat is in the forward position area, the sensor 12 is disengaged from the lower slide rail 102, and the Y-direction distance between the sensor 12 and the outer wall 101a of the upper slide rail 101 is relatively large, preferably 7.8±0.5mm. At this time, the magnetic flux of the magnetic field in which the chip inside the sensor 12 is located becomes smaller and reaches the set threshold, thereby causing the Hall chip inside the sensor 12 to output a current signal representing "forward".

[0037] On the other hand, the present invention provides a seat belt restraint force control system, including the above-mentioned automobile seat front and rear position recognition device 1 and a vehicle safety controller, the Hall chip is connected to the vehicle safety controller through a wiring harness, and the vehicle safety controller controls the restraint force of the seat belt based on the signal from the Hall chip, that is, when the seat is in the front position area, the time for the driver and passenger to hit the airbag is relatively short, and the time for the seat belt restraint force to reduce is relatively early. When the seat is in the rear position area, the time for the driver and passenger to hit the airbag is relatively long, and the time for the seat belt restraint force to reduce is relatively delayed.

[0038] The present invention has low cost. Using this solution only requires drilling a hole in the original seat solution and adding a seat slide rail position sensor, without providing additional counterparts. It has high versatility. It only requires drilling a hole in the upper surface of the upper rail to achieve the function, without making a lot of changes to the seat frame.

[0039] The above are only preferred embodiments of the present invention, which are only illustrative and not restrictive. The structures and connection modes of the components in the present invention can be changed, and any equivalent transformations and improvements based on the technical solution of the present invention should not be excluded from the protection scope of the present invention.

Claims

1. A device for identifying the front and rear position of a car seat, characterized in that: Installed at the front of the upper slide rail of the car seat, the identification device includes a sensor, the sensor is located on the side of the slide rail of the car seat; the sensor includes a Hall chip and a magnet, the Hall chip is used to detect the change of the magnetic field generated by the magnet; When the car seat is located in the rearward position area, the upper slide rail and the magnet are blocked by the lower slide rail; When the car seat is located in the front position area, the lower slide rail moves out from between the upper slide rail and the magnet; Therefore, when the vehicle seat is in different position areas, the magnetic field generated by the magnet changes.

2. A vehicle seat front and rear position recognition device as claimed in claim 1, characterized in that: It also includes an L-shaped bracket, a first end of which is fixed to the top surface of the upper slide rail, and a second end of which is fixedly connected to the sensor.

3. A vehicle seat front and rear position recognition device as claimed in claim 2, characterized in that: The top surface of the upper slide rail is provided with a mounting hole, and the first end of the L-shaped bracket is provided with a clamping portion that matches the mounting hole.

4. The device for recognizing the front and rear position of a vehicle seat as claimed in claim 1, characterized in that: The sensor further comprises a shell, and the Hall chip and the magnet are located inside the shell.

5. The device for recognizing the front and rear position of a vehicle seat as claimed in claim 1, characterized in that: When the car seat is located in the rearward position area, the distance between the side wall of the lower sliding rail and the sensor is 4.5±0.5 mm.

6. The device for recognizing the front and rear position of a vehicle seat as claimed in claim 1, characterized in that: When the car seat is located in the front position area, the distance between the side wall of the upper slide rail and the sensor is 7.8±0.5 mm.

7. A seat belt restraint force control system, characterized in that: The device comprises a front and rear position recognition device for a vehicle seat as claimed in any one of claims 1 to 6, The control system also includes a vehicle safety controller, the Hall chip is connected to the vehicle safety controller by signal, and the vehicle safety controller controls the restraining force of the seat belt based on the signal from the Hall chip.

8. A seat belt restraint force control system as claimed in claim 7, characterized in that: When the magnetic flux detected by the Hall chip is less than a predetermined threshold, a seat forward signal is output to the vehicle safety controller; when the magnetic flux detected by the Hall chip is greater than the predetermined threshold, a seat backward signal is output to the vehicle safety controller.

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