Device for driving a headlight cover
Patent Information
- Authority / Receiving Office
- DE · DE
- Patent Type
- Patents
- Current Assignee / Owner
- HYUNDAI MOTOR CO LTD
- Filing Date
- 2015-02-11
- Publication Date
- 2026-07-23
AI Technical Summary
Existing adaptive headlamp systems using stepper motors are complex and costly due to the need for specific logic, power supplies, and sensors to control light distribution patterns, increasing manufacturing costs.
A headlamp cover driving device utilizing a DC motor with a rotating member, guides, elastic members, and stops to control the rotation of shades without the need for sensors, simplifying the structure and reducing costs.
Reduces manufacturing costs and ensures precise control of light distribution patterns by using a DC motor with elastic members and guides, eliminating the need for sensors and preventing misoperation.
Smart Images
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Abstract
Description
TECHNICAL FIELD
[0001] The present disclosure relates to an apparatus for driving a headlight cover using a direct current (DC) motor. STATE OF THE ART
[0002] A headlight is a device that illuminates the area in front of a vehicle and provides sufficient brightness to illuminate an obstacle at a specific distance, for example, 100 meters, ahead of a road at night. Standards for headlight specifications vary from country to country.
[0003] Automotive headlights must provide an optimal driving environment according to the vehicle's driving conditions, road conditions, and ambient brightness. Recently, an adaptive front lighting system has been used to change the light distribution pattern according to the vehicle's driving conditions.
[0004] Such an adaptive front lighting system adaptively changes a light distribution pattern according to the driving conditions of a vehicle. It uses a plurality of light shields that determine light distribution patterns by blocking part of the light from a light source. When using a plurality of light shields, shields with different patterns are arranged along a cylindrical cover, and light distribution patterns are adjusted by rotating the cylindrical cover. In the prior art, a stepper motor was used to rotate headlight covers, making it possible to precisely control the positions of the shields.
[0005] However, specific, exclusive logic with a complex power supply for providing pulse signals to activate the stepper motor and a specific sensor for storing the initial operating position are required. Therefore, the system design is complex and manufacturing costs are high.
[0006] The foregoing is intended merely to assist in understanding the background of the present disclosure and is not intended to imply that the present disclosure falls within the scope of prior art already known to those skilled in the art. SUBJECT OF THE INVENTION
[0007] The present disclosure has been made in consideration of the above problems encountered in the prior art. One aspect of the present inventive concept provides a headlight cover driving device with a DC motor that uses a rotary member extending from a cover rotary shaft and a plurality of guides and elastic members.
[0008] According to an exemplary embodiment of the present inventive concept, a device for driving a headlight cover includes a rotary shaft rotated by a motor and covered with covers. A rotary member extends from the rotary shaft, rotates with the rotary shaft, and has at least one projection on one surface. A plurality of guides are fitted around the rotary member and have corresponding grooves on inner surfaces for receiving the at least one projection of the rotary member. An elastic member is fitted to the grooves.
[0009] The motor can be a direct current (DC) motor.
[0010] Each of the guides may further include a support that extends the elastic member when the guides rotate with the rotating shaft.
[0011] A support of a first guide of the plurality of guides may be coupled to a first end of the elastic member to extend the elastic member in a first direction, and a support of a second guide is coupled to a second end of the elastic member to extend the elastic member in a second direction.
[0012] The grooves may allow the projection to rotate at certain angles.
[0013] A groove of the first guide may allow the projection to rotate in a second direction, and a groove of the second guide may allow the projection to rotate in a first direction.
[0014] The device may further comprise a stop to prevent the guides from rotating in certain directions.
[0015] The stop can prevent the first guide from rotating in a second direction and the second guide from rotating in a first direction.
[0016] The device may further include a first stopper that prevents the first guide of the plurality of guides from rotating in a direction opposite to a rotational direction of the rotary shaft when the first guide returns after rotating with the rotary shaft, and prevents the first guide from rotating in the rotational direction of the rotary shaft when a second guide rotates with the rotary shaft. A second stopper prevents the second guide of the plurality of guides from rotating in the direction opposite to the rotational direction of the rotary shaft when the second guide returns after rotating with the rotary shaft, and prevents the second guide from rotating in the rotational direction of the rotary shaft when the first guide rotates with the rotary shaft.
[0017] The device may further comprise a control device configured to control the motor according to a speed of a vehicle.
[0018] If the vehicle breaks down, the control device can stop the control.
[0019] According to a headlamp cover driving device, manufacturing costs can be reduced compared to using a stepper motor after covers are driven by a DC motor.
[0020] Since an elastic member and a plurality of the guides are used in the present disclosure, no specific sensors for storing the positions of the shutters are necessary, thereby simplifying the structure and reducing the manufacturing cost.
[0021] Furthermore, a stopper is used to prevent the shutters from rotating beyond a certain angle and allow them to move / return to the exact initial positions, thus preventing misoperation. BRIEF DESCRIPTION OF THE DRAWINGS
[0022] The above and other objects, features and other advantages of the present disclosure will become more apparent from the following detailed description when considered in conjunction with the accompanying drawings.
[0023] Fig. 1 is a view showing a headlamp cover driving device according to an embodiment of the present inventive concept.
[0024] Fig. 2 is a perspective view showing apertures and a rotary shaft according to an embodiment of the present inventive concept.
[0025] Fig. 3 is a front view showing the apertures and the rotary shaft according to an embodiment of the present inventive concept.
[0026] Fig. 4A is a view showing a first guide according to an embodiment of the present inventive concept.
[0027] Fig. 4B is a view showing a second guide according to an embodiment of the present inventive concept.
[0028] Fig. 5A is a view showing the headlamp cover driving apparatus in a mode C according to an embodiment of the present inventive concept.
[0029] Fig. 5B is a view showing the headlamp cover driving apparatus in a mode V according to an embodiment of the present inventive concept.
[0030] Fig. 5C is a view showing the headlamp cover driving apparatus in a mode E according to an embodiment of the present inventive concept. DETAILED DESCRIPTION
[0031] Hereinafter, a headlamp cover driving apparatus according to exemplary embodiments of the present inventive concept will be described with reference to the accompanying drawings.
[0032] Fig. 1 is a view showing a headlamp cover driving device according to an embodiment of the present inventive concept, Fig. 2 is a perspective view showing apertures and a rotary shaft according to an embodiment of the present inventive concept, Fig. 3 is a front view showing the apertures and the rotary shaft according to an embodiment of the present inventive concept, Fig. 4A is a view showing a first guide according to an embodiment of the present inventive concept, Fig. 4B is a view showing a second guide according to an embodiment of the present inventive concept, Fig. 5A is a view showing the headlamp cover driving apparatus in a mode C according to an embodiment of the present inventive concept, Fig. 5B is a view showing the headlight cover driving device in a mode V according to an embodiment of the present inventive concept, and Fig. 5C is a view showing a device for driving a headlight cover in a mode E according to an embodiment of the present inventive concept.
[0033] Referring to Fig. 1 to Fig. 5C may be a device 100 a rotary shaft to drive a headlight cover125 which are characterized by a motor 110 rotates and with apertures 120 is covered. A rotating component 130 extends from the rotating shaft 125 , rotates with the rotating shaft 125 and has at least a lead 135 on its surface. A variety of guided tours 140 is around the rotating component 130 fitted and has grooves 142 and 146 accordingly on their inner sides to prevent the projection 135 of the rotating component 130 An elastic component 150 is on the tours 140 attached. The engine 110 can be a DC motor.
[0034] The tours 140 are parallel to the rotating component 130 arranged and rotate selectively according to the rotation directions of the rotating shaft 125 , which is caused by the engine 110 For example, if the rotating shaft 125in a first direction by the engine 110 rotates, only a first guide rotates 141 the tours 140 in the first direction through the projection 135 of the rotating component 130 On the other hand, if the rotating shaft 125 in a second direction by the engine 110 rotates, only a second guide rotates 145 the tours 140 in the second direction through the projection 135 of the rotating component 130 The detailed structure and operation are described below.
[0035] A head start 135 can be attached to the rotating component 130 designed to fit into the grooves 142 and 146 the guides is to be inserted, or a multitude of projections 135 can be designed to fit into the grooves 142 and 146 to be introduced to the tours.
[0036] In the present revelation, the first and second guides 141 and 145 furthermore corresponding beams or columns 143 and 147 which the elastic component 150 extend if the tours 140 with the rotating shaft 125 turn. The carrier 147 the second lead 145 is connected to a second end of the elastic component 150 coupled to the elastic component 150 in the second direction, and the carrier 143 the first tour 141 is connected to a first end of the elastic component 150 coupled to the elastic component 150 to extend in the first direction.
[0037] In particular, the elastic component 150 about the tours 140 attached and with the carriers 143 and 147 the tours 140 For example, if the second guide 145in the second direction by the motor 110 rotates, the first end of the elastic component rotates 150 accordingly. In this process, the first guide 141 which is connected to the first end of the elastic component 150 coupled, so that the elastic component 150 by rotating the second guide 145 extended and a return force in a direction opposite to the direction of rotation of the motor 110 On the other hand, when the first guide 141 in the first direction by the engine 110 rotates, the first end of the elastic component rotates 150 accordingly, and the second guide 145 which is connected to the second end of the elastic component 150 coupled, does not rotate, so that the elastic component 150 by turning the first guide 141extended and a return force in the opposite direction to the direction of rotation of the motor 110 is generated.
[0038] Therefore, if a moment of the engine 110 is removed, the panels return 120 by the return force of the elastic component 150 to initial positions. This means that it is possible to adjust the apertures 120 , even without sensors to store the rotation positions of the apertures 120 , as in the state of the art, to initial positions.
[0039] The grooves 142 and 146 the tours 140 allow the lead 135 that it rotates at certain angles so that the groove 142 the first tour 141 the lead 135 allowed to rotate in the second direction, and the groove 146 the second lead 145 the lead 135 allowed to turn in the first direction.
[0040] For example, referring to Fig. 4A, defines the groove 142 the first tour 141 a space in which the projection 135 of the rotating component 130 and rotates in the second direction (counterclockwise in the figure). In an early stage of operation, the projection 135 at the left end of the groove 142 positioned. If the projection 135 in the second direction by the motor 110 rotates, it only rotates along the groove 142 the first tour 141 , but turns the first lead 141 not. If the lead 135 through the engine 110 in the first direction, it turns the first guide 141 in the first direction.
[0041] On the other hand, referring to Fig. 4B, defines the groove 146 the second lead 145a space into which the projection 135 of the rotating component 130 and rotates in the first direction (clockwise in the figure). The operating path is opposite to that of the first guide 141 . According to this structure, the plurality of guides can be selectively adjusted according to the rotation directions of the motor 110 turn.
[0042] The present disclosure further includes a stop 160 to stop the rotation of the guides 140 in certain directions. The attack 160 prevents the first lead 141 the guides rotate in the second direction and the second guide 145 rotates in the first direction.
[0043] A further embodiment may comprise a first stop which prevents the first guide 141 the guides in the opposite direction to the direction of rotation of the rotating shaft 125rotates when, after rotating with the rotating shaft 125 returns and prevents the first lead 141 in the direction of rotation of the rotating shaft 125 turns when the second guide 145 with the rotating shaft 125 A second stop prevents the second guide from 145 the guides in the opposite direction to the direction of rotation of the rotating shaft 125 rotates when, after rotating with the rotating shaft 125 returns and prevents the second lead 145 in the direction of rotation of the rotating shaft 125 turns when the first guide 141 with the rotating shaft 125 turns.
[0044] The attack 160 is coupled to a housing (not shown) and can be mounted on one side of the carrier 143 and 147 the first tour 141 and the second lead 145arranged to prevent their rotation. Alternatively, a plurality of stops 160 on the sides of the carriers 143 and 147 the first tour 141 and the second lead 145 be arranged.
[0045] According to this structure, it is possible to prevent the guides 140 rotate over a certain angle by the driving force of the motor, or in the opposite direction to the direction of rotation of the rotating shaft 125 rotate due to the return force of the elastic component.
[0046] The present disclosure further includes a control device that controls the motor 110 controls based on a speed of a vehicle, and if a vehicle breaks down, the controller can stop the control.
[0047] For example, when headlights are turned off or an engine in a vehicle stops, or when a speed of the vehicle is within a range for a normal mode, the controller can 120 not operate, resulting in a beam pattern in a mode C, as in Fig. 5A. Furthermore, when the vehicle speed is within a range for a downtown mode, the controller operates the shutters 120 such that a mode V is executed with a length of a beam pattern smaller than that in mode C, as in Fig. 5B. In contrast, when the vehicle speed is within a high-speed mode range, the controller operates the shutters 120 such that a mode E is executed with the length of a beam pattern greater than that in mode C, as in Fig. 5C shown.
[0048] The range for normal mode is larger than the range for downtown mode and smaller than the range for high-speed mode. Mode V or Mode E can be changed to a high beam mode, and the high beam mode can have a longer beam pattern than Mode V.
[0049] According to a headlight cover driving device having the above-described structure, since shades are driven by a DC motor, manufacturing costs can be reduced compared with using a stepping motor.
[0050] Since an elastic member and a plurality of guides are used, the present disclosure can be achieved even without sensors for storing positions of the shutters, so that the structure can be simplified and manufacturing costs can be reduced.
[0051] In addition, a stopper is provided to prevent the apertures from rotating beyond a certain angle and allow them to move / return to the exact initial positions, thus preventing malfunction.
[0052] Although an exemplary embodiment of the present invention has been described for purposes of illustration, those skilled in the art will recognize that various modifications, additions, and omissions are possible without departing from the scope and spirit of the disclosure as disclosed in the appended claims.
Claims
[1] Device for driving a headlight cover, comprising: a rotating shaft that rotates through a motor and is covered with covers, a rotating member extending from the rotating shaft, the rotating member rotating with the rotating shaft and having at least one projection on a surface thereof, a plurality of guides mounted around the rotary member and having corresponding grooves on inner sides thereof for receiving the projection of the rotary member, and an elastic component attached to the guides. [2] The apparatus of claim 1, wherein the motor is a direct current (DC) motor. [3] The device according to claim 1 or 2, wherein each of the guides further comprises a support that extends the elastic member when the guides rotate with the rotary shaft. [4] The device of claim 3, wherein a support of a first guide of the plurality of guides is coupled to a first end of the elastic member to extend the elastic member in a first direction, and a support of a second guide is coupled to an end of the elastic member to extend the elastic member in a second direction. [5] Device according to one of the preceding claims, in which the grooves allow the projection to rotate at certain angles. [6] The device according to claim 5, wherein a groove of a first guide of the plurality of guides allows the projection to rotate in a second direction, and a groove of a second guide allows the projection to rotate in a first direction. [7] Device according to one of the preceding claims, further comprising a stop which prevents the guides from rotating in certain directions. [8] The apparatus of claim 7, wherein the stopper prevents a first guide of the plurality of guides from rotating in a second direction and a second guide from rotating in a first direction. [9] The device according to claim 1, further comprising: a first stopper that prevents a second guide of the plurality of guides from rotating in a direction opposite to a direction of rotation of the rotary shaft when the second guide returns after rotating with the rotary shaft, and prevents the second guide from rotating in the direction of rotation of the rotary shaft when the second guide rotates with the rotary shaft, and a second stopper that prevents the second guide of the plurality of guides from rotating in the opposite direction to the rotating direction of the rotating shaft when the second guide returns after rotating with the rotating shaft, and prevents the second guide from rotating in the rotating direction of the rotating shaft when the second guide rotates with the rotating shaft. [10] Apparatus according to any one of the preceding claims, further comprising a control device that controls the motor according to a speed of the vehicle. [11] Apparatus according to claim 10, wherein when the vehicle breaks down, the control means stops the control. [12] Device according to one of the preceding claims, wherein the guides are arranged in parallel on the rotary member and rotate selectively according to the directions of rotation of the rotary shaft which rotates through the motor. [13] Device according to claim 7, wherein the stop is arranged on one side of supports of the guides.