A sunshade hinge control system with passive safety function

Abstract

This invention provides a sun visor pivot control system with passive safety functions, including a control section and an execution section. The control section includes an electronic control unit, which takes vehicle collision recognition signals and sun visor stationary position recognition signals as input sources, performs decision processing through a set logic algorithm, and outputs drive commands to the execution section. The execution section includes pivot A, pivot B, a metal tube, a magnetic sleeve, a spring, and a solenoid. This invention addresses the potential risk of occupant injury from traditional automotive sun visors during vehicle collisions. By integrating resources such as the vehicle's electronic control unit and vehicle collision sensing and monitoring system, it cleverly applies an electromagnetic mechanism to enable the sun visor to respond promptly and protectively to occupants during a collision, which is of great significance for improving overall vehicle safety in the future.

Description

Technical Field

[0001] This invention relates to the field of automotive parts technology, and in particular to a sun visor pivot control system with passive safety functions. Background Technology

[0002] The primary function of a car sun visor is to shield occupants from sunlight, preventing glare that could affect driving comfort and safety. When the sun visor is in its working position, it is generally positioned between the vehicle's vertical orientation and its automatic retraction start position. If a frontal collision occurs at this time, the occupants will be thrown forward due to inertia, and their heads are highly likely to collide with the sun visor itself. Firstly, when the sun visor uses an injection-molded frame structure, especially when matched with a PVC surface, the visor is extremely rigid. Secondly, the vanity mirror mounted on the sun visor is highly susceptible to shattering during high-speed impacts, producing sharp fragments that fly everywhere. Both of these factors pose a significant threat to occupant protection. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to provide a sun visor pivot control system with passive safety function in view of the above-mentioned technical status, so that the sun visor assembly can have passive safety function.

[0004] The present invention adopts the following technical solution: A sun visor pivot control system with passive safety function includes a control part and an execution part. The control part includes an electronic control unit, which takes vehicle collision recognition signal and sun visor dwell position recognition signal as input sources, performs decision processing through a set logic algorithm, and outputs drive commands to the execution part. The execution part includes pivot A, pivot B, metal tube, magnetic sleeve, spring, and solenoid. The vehicle collision signal source uses the airbag deployment trigger signal. When a collision occurs, the collision sensor detects the strength of the collision signal and inputs it to the electronic control unit. The latter combines the signals from other collision sensors and performs calculations to determine whether to output a trigger signal. A contact limit switch is fixed inside the sun visor body, and an asymmetrical arc structure is designed on the rotating shaft. The latter is designed to match and cooperate with the contact limit switch. When the sun visor body is in the sun visor working area, the circuit is connected, and vice versa. In this way, the electronic control unit can collect the identification signal of the sun visor's stopping position. The electronic control unit can only output drive commands to the execution part when it simultaneously receives a valid collision signal and a recognition signal that the sun visor is in the sunshade working area.

[0005] Improvements to the above technical solution: The materials of the rotating shaft A and rotating shaft B are generally PA6-GF30; the rotating shaft A and rotating shaft B have metal tubes running through them, and the metal tubes are integrally formed with the rotating shaft A during injection molding, so that the two cannot move relative to each other.

[0006] Further improvement to the above technical solution: The inner wall of the rotating shaft B is designed with a 0.1mm assembly gap with the metal tube, and the rotating shaft B can rotate around the axis of the metal tube.

[0007] A further improvement to the above technical solution: the rotating shaft A is fixed to the body sheet metal via a shaft seat, and the rotating shaft B cooperates with the snap ring built into the sun visor body to generate a flipping torque.

[0008] A further improvement to the above technical solution: the rotating shaft A is fixed to the body sheet metal via a shaft seat, and the rotating shaft B cooperates with the snap ring built into the sun visor body to generate a flipping torque.

[0009] A further improvement to the above technical solution: the rotating shaft A and the rotating shaft B are connected by a magnetic sleeve made of permanent magnet material, wherein the rotating shaft B and the magnetic sleeve are fitted with a shaft hole, and the fitted cross section is polygonal. The magnetic sleeve is connected to the rotating shaft A by an involute toothed joint under the action of a spring.

[0010] A further improvement to the above technical solution: the rotating shaft A and the rotating shaft B are connected by a magnetic sleeve made of permanent magnet material, wherein the rotating shaft B and the magnetic sleeve are fitted with a shaft hole, and the fitted cross section is polygonal. The magnetic sleeve is connected to the rotating shaft A by an involute toothed joint under the action of a spring.

[0011] The present invention has the following beneficial effects: This invention addresses the potential risk of injury to occupants from traditional car sun visors during vehicle collisions. By integrating resources such as the vehicle's electronic control unit and vehicle collision sensing and monitoring system, it cleverly applies an electromagnetic mechanism to enable the sun visor to respond promptly and protect occupants during a collision, which is of great significance for improving the safety of the entire vehicle in the future. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the sun visor assembly of the present invention installed on a vehicle. Figure 2 This is a flowchart of the control part of the present invention; Figure 3 This is a schematic diagram of the composition of the rotating shaft mechanism of the execution part of the present invention; Figure 4 yes Figure 3 Sectional view along axis AA; Figure 5 yes Figure 4 BB-direction sectional view; Figure 6 This is a schematic diagram showing the disengagement of rotating shaft A and rotating shaft B in the execution part of this invention.

[0013] In the diagram: 1. Shaft; 11. Shaft A; 12. Shaft B; 13. Metal tube; 14. Magnetic sleeve; 15. Spring; 16. Solenoid; 2. Shaft seat; 3. Snap ring; 4. Sun visor body; 5. Body sheet metal. Detailed Implementation

[0014] The present invention will now be further described with reference to the accompanying drawings, which are simplified schematic diagrams illustrating only the basic structure of the invention and therefore only show the components relevant to the invention.

[0015] See Figures 1 to 6 The present invention provides a sunshade pivot control system with passive safety function, comprising: a control part and an execution part.

[0016] The assembly conditions applicable to this invention are the same as those of a traditional sun visor, namely, one end of the sun visor pivot 1 is connected to and installed on the body sheet metal 5 via the bearing seat 2, and the other end is inserted into the sun visor body 4, and cooperates with the snap ring 3 built into the sun visor body 4 to generate a flipping torque, so as to realize the function of the sun visor body 4 being able to flip around the axis of the pivot 1 to block light.

[0017] The main body of the control part of this invention is an electronic control unit. By monitoring the vehicle collision recognition signal and the position recognition signal of the sunshade working area in real time, when both signals are valid, the electronic control unit inputs drive commands to the following execution part.

[0018] The execution part of this invention consists of a rotating shaft A11, a rotating shaft B12, a metal tube 13, a magnetic sleeve 14, a spring 15, and a solenoid 16.

[0019] Metal tubes 13 pass through the interior of the rotating shafts A11 and B12. The metal tubes 13 and the rotating shafts A11 are integrally formed during injection molding, and the two cannot move relative to each other. However, a 0.1mm gap is reserved when the metal tubes 13 and the rotating shafts B12 are assembled, so that the rotating shafts B12 can rotate around the axis of the metal tubes 13.

[0020] The rotating shaft A11 is fixed to the body sheet metal 5 via the shaft seat 2, and the rotating shaft B12 cooperates with the retaining spring 3 in the sun visor body 4 to generate a flipping torque.

[0021] The rotating shaft A11 and the rotating shaft B12 are connected by a magnetic sleeve 14 made of permanent magnet material. The rotating shaft B12 and the sleeve 14 are fitted with a shaft hole with a polygonal cross section, which ensures that the two can only move relative to each other in the axial direction and cannot rotate relative to each other.

[0022] The magnetic sleeve 14 is connected to the rotating shaft A11 in an involute toothed manner under the action of the spring 15. This structure can ensure that the torque reaction force generated by the cooperation between the snap ring 15 and the rotating shaft B12 can be transmitted to the body sheet metal 5 through the rotating shaft A11, so as to realize the flipping operation of the sun visor body 4 when the vehicle is not in a collision.

[0023] A solenoid 16 is inserted into the rotating shaft A11. After receiving the drive command from the electronic control unit, the solenoid 16 is energized (and kept energized for about 2 seconds by a relay). The electromagnetic effect is used to generate a magnetic field to drive the magnetic sleeve 14 on the rotating shaft B12 to slide along the axis, so that the magnetic sleeve 14 and the rotating shaft A11 are disengaged from the toothed connection.

[0024] After the magnetic sleeve 14 and the rotating shaft A11 disengage, the torque reaction force generated by the rotating shaft B12 and the retaining spring 3 cannot be transmitted to the body sheet metal 5. The sun visor body 4 then loses its holding force in the working area and slides down to the vertical position of the vehicle body. At the same time, the sun visor body 4 and the retaining spring 3 also cannot obtain the reaction force that hinders its rotation around the axis. This is equivalent to a significant reduction in the reverse impact force and impact angle of the occupant's head hitting the sun visor body when the vehicle collides.

[0025] The solenoid 16 is located inside the rotating shaft A11 and outside the metal tube 13, and can be integrally injection molded with the rotating shaft A11 after being sleeved on the outer wall of the metal tube 13.

[0026] Two arc-shaped conductive metal sheets are embedded on the outer surface of the rotating shaft A11, which are connected to both ends of the solenoid 16 respectively, and the solenoid 16 is made conductive by means of brush contact.

[0027] The metal tube 13 should be made of non-ferromagnetic material such as high-strength aluminum alloy, while the magnetic sleeve 14 should be made of permanent magnetic material. The magnetic field strength of the toothed joint surface between the rotating shaft A11 and the magnetic sleeve 14 can be calculated using the formula for the axial magnetic field strength of a single-layer solenoid.

[0028] This invention addresses the potential risk of injury to occupants from traditional car sun visors during vehicle collisions. It innovatively proposes a sun visor pivot mechanism with passive safety functions, based on the working principle of the sun visor. By integrating resources such as the vehicle's electronic control unit and the vehicle collision sensing and monitoring system, an electromagnetic mechanism is applied to enable the sun visor to respond promptly to actions that are beneficial to occupant protection when a vehicle collision occurs.

[0029] The above description is only a preferred embodiment of the present invention. For those skilled in the art, it can be applied to sun visor assemblies with various configurations and functions without departing from the technical principle of the present invention, such as those with makeup mirror lighting, hinge pull-out extension function, etc. These applications are also considered to be within the protection scope of the present invention.

Claims

1. A sunshade hinge control system with passive safety function, comprising a control unit and an execution unit, characterized in that: The control unit includes an electronic control unit, which takes vehicle collision recognition signal and sun visor dwell position recognition signal as input sources, performs decision processing through a set logic algorithm, and outputs drive commands to the execution unit. The execution unit includes a rotating shaft A, a rotating shaft B, a metal tube, a magnetic sleeve, a spring, and a solenoid. The rotating shaft A and rotating shaft B are connected by a magnetic sleeve made of permanent magnet material. The rotating shaft B and the magnetic sleeve are fitted with a shaft hole, and the mating cross section is polygonal. The magnetic sleeve is connected to the rotating shaft A by an involute toothed joint under the action of a spring. A solenoid is inserted inside the rotating shaft A. After receiving a drive command from the electronic control unit, the solenoid is energized, and the electromagnetic effect is used to generate a magnetic field to drive the magnetic sleeve on the rotating shaft B to slide along the axis, so that the magnetic sleeve and the rotating shaft A are disengaged from the toothed joint. The vehicle collision signal source uses the airbag deployment trigger signal. When a collision occurs, the collision sensor detects the strength of the collision signal and inputs it to the electronic control unit. The latter combines the signals from other collision sensors and performs calculations to determine whether to output a trigger signal. A contact limit switch is fixed inside the sun visor body, and an asymmetrical arc structure is designed on the rotating shaft. The latter is designed to match and cooperate with the contact limit switch. When the sun visor body is in the sun visor working area, the circuit is connected, and vice versa. In this way, the electronic control unit can collect the identification signal of the sun visor's stopping position. The electronic control unit can only output drive commands to the execution part when it simultaneously receives a valid collision signal and a recognition signal that the sun visor is in the sunshade working area.

2. A sunshade shaft control system with passive safety function according to claim 1, characterized in that: The material of the rotating shaft A and rotating shaft B is PA6-GF30; the metal tubes are inserted inside the rotating shaft A and rotating shaft B, and the metal tubes are integrally formed with the rotating shaft A during injection molding, and the two cannot move relative to each other.

3. A sunshade shaft control system with passive safety function according to claim 1 or 2, characterized in that: The inner wall of the rotating shaft B is designed with a 0.1mm assembly gap with the metal tube, and the rotating shaft B can rotate around the axis of the metal tube.

4. A sunshade shaft control system with passive safety function according to claim 1 or 2, characterized in that: The rotating shaft A is fixed to the body sheet metal via a shaft seat, and the rotating shaft B cooperates with the snap ring built into the sun visor body to generate a flipping torque.

5. A sunshade shaft control system with passive safety function according to claim 3, characterized in that: The rotating shaft A is fixed to the body sheet metal via a shaft seat, and the rotating shaft B cooperates with the snap ring built into the sun visor body to generate a flipping torque.

6. A sunshade shaft control system with passive safety function according to claim 3, characterized in that: The rotating shaft A and rotating shaft B are connected by a magnetic sleeve made of permanent magnet material. The rotating shaft B and the magnetic sleeve are fitted with a shaft hole, and the mating cross section is polygonal. The magnetic sleeve is connected to the rotating shaft A by an involute toothed joint under the action of a spring.

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