Lighting device for a motor vehicle headlamp
By introducing alignment devices and damping devices into motor vehicle headlights, the problem of displacement and deformation of the shading element under vibration and temperature difference environments is solved, and the stability of the shading element in the closed position and the stable emission of the light path are achieved.
Patent Information
- Application Number
- CN202510250794.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Priority Date
- 2024-03-19
- Filing Date
- 2025-03-04
- Publication Date
- 2025-09-19
AI Technical Summary
The existing shading elements of motor vehicle headlamps are easily displaced and deformed under vibration and temperature difference environments, resulting in unstable shading effects.
The alignment element and the damping element are used to insert the alignment element into the guide element to achieve precise alignment of the shading element, and the damping element is used to prevent the movement of the shading element, thereby ensuring the stability of the shading element in the closed position.
The stability of the shading element in the closed position is improved, the displacement and deformation of the shading element caused by vibration and temperature difference are prevented, and the stable emission of the light path is ensured.
Smart Images
Figure CN120667669A_ABST
Abstract
Description
Technical Field
[0001] The present invention relates to a lighting device for a motor vehicle headlamp, wherein the lighting device comprises: at least one light module, which is arranged to emit light along a light path in a main emission direction; a movable lower shading element and a movable upper shading element; a moving device, which is used to switch the lower shading element and the upper shading element relative to each other between a closed position and an open position while maintaining spatial alignment of the upper shading element (100) and the lower shading element (200), in which, when viewed from the main emission direction, the lower shading element and the upper shading element are positioned in front of the at least one light module and at least partially block the light path of the at least one light module, and in which, when viewed from the main emission direction, the lower shading element and the upper shading element are moved away from the light path of the at least one light module to release the light path of the at least one light module; and a frame, which is stationary relative to the movement of the lower shading element and the upper shading element, wherein the moving device is arranged at the frame.
[0002] Furthermore, the invention relates to a motor vehicle headlight having at least one lighting device according to the invention. Background Art
[0003] In the prior art, there are lighting devices that include upper and lower shade elements that can be switched between an open and closed position. However, this requires complex mechanisms, particularly to ensure that the shade elements are actually closed in the closed position. However, due to vibrations and temperature differences in motor vehicle headlamps, driving maneuvers can cause the positions of the lower and upper shade elements in the closed position to shift and become displaced relative to each other. Furthermore, the upper and lower shade elements may include matching design elements, which must ensure the alignment of the shade elements in the closed position. For example, such design elements could be vertical markings that originate from the upper shade element and extend into the lower shade element. Displacement and / or deformation of the shade elements relative to each other could result in the intended vertical markings no longer being visible. Summary of the Invention
[0004] It is therefore an object of the present invention to provide an improved lighting device.
[0005] The object is achieved in that the lighting device comprises at least one alignment device for aligning the lower shading element and the upper shading element with each other in the closed position, wherein the at least one alignment device comprises:
[0006] - alignment elements, and
[0007] - a guiding element complementary to the alignment element,
[0008] The alignment element is configured to be inserted into the guide element when the lower shading element and the upper shading element are switched from the open position to the closed position, so that the alignment element can be guided by the guide element to the end position of the guide element, wherein the alignment element is connected to the guide element in a form-fitting manner in the end position of the guide element when the lower shading element and the upper shading element are in the closed position, so that the lower shading element and the upper shading element are protected in the closed position to prevent movement along the main emission direction and transversely to the main emission direction.
[0009] “Transversely to the main emission direction” also includes upward and downward relative to the main emission direction. Generally speaking, the expressions “upper”, “lower”, “left”, “right”, “side”, etc. relate to the lighting device in the motor vehicle headlamp when the motor vehicle headlamp is correctly installed in the motor vehicle.
[0010] It can be provided that the lower shading element and the upper shading element are designed as lighting elements which are arranged to radiate light in the closed position, preferably in the main emission direction, and wherein the shading elements designed as lighting elements preferably do not radiate light in the open position.
[0011] It can be provided that the alignment element is of approximately conical design, wherein the guide element is designed to be complementary to the alignment element, so that the conically designed alignment element is supported in a positively locking manner in an end position in the guide element.
[0012] It may be provided that the lighting device comprises at least two alignment means.
[0013] It can be provided that the alignment element is arranged on the upper shading element and the guide element is arranged on the lower shading element, or that the alignment element is arranged on the lower shading element and the guide element is arranged on the upper shading element.
[0014] It can be provided that the alignment element is of elastic design, wherein preferably the alignment element is formed from plastic, preferably PP-GF30 (polypropylene with 30% glass fiber), the alignment element being overmolded with an elastic material, preferably TPE (thermoplastic elastomer).
[0015] It can be provided that the lighting device includes a damping device, which is configured to prevent the lower shading element and the upper shading element from being switched to the open position, wherein the damping device includes at least two pairs of elastic damping elements and stoppers corresponding to the damping elements, wherein at least one pair of damping elements and stoppers are respectively assigned to the lower shading element and the upper shading element, and wherein, when the shading element is switched to the open position, the damping element is stopped at the corresponding stopper, so that the squeezing of the damping element prevents the lower shading element and the upper shading element from being switched to the open position.
[0016] It can be provided that the paired damping elements are arranged on the lower and upper shading elements and the stoppers are arranged on the frame, or that the damping elements are arranged on the frame and the stoppers are arranged on the lower and upper shading elements.
[0017] It may be provided that the damping element is formed from EPDM (ethylene propylene diene monomer; M-group (synthetic rubber)).
[0018] It may be provided that the damping element is formed in a hemispherical shape.
[0019] The object is also achieved by a motor vehicle headlight comprising at least one lighting device. BRIEF DESCRIPTION OF THE DRAWINGS
[0020] In the following, the present invention is explained in more detail with reference to the accompanying exemplary drawings.
[0021] Figure 1 shows a front view of an exemplary motor vehicle headlamp having an exemplary lighting device including an upper shade element and a lower shade element in a closed position,
[0022] Figure 2 Show Figure 1 a front view of a motor vehicle headlamp in FIG, wherein the upper and lower light shielding elements are in an open position, wherein in the open position the two light modules are released to emit light,
[0023] Figure 3 A perspective sectional view showing an upper shading element and a lower shading element in a closed position, wherein the lighting device comprises an alignment device having an alignment element and a guide element corresponding to the alignment element, wherein in the closed position shown, the alignment element is inserted into the guide element,
[0024] Figure 4 Show Figure 3 Detailed view of the alignment device in FIG when the lower shading element and the upper shading element are in the closed position,
[0025] Figure 5 A single perspective view showing an exemplary tapered alignment element,
[0026] Figure 6 A single perspective view of an exemplary damping element is shown,
[0027] Figure 7 a perspective view showing a guide element with alignment means for a portion of a lower shading element,
[0028] Figure 8A perspective side view of a lighting device is shown, wherein the lower shading element and the upper shading element are in an open position, wherein an exemplary damping device is shown in a dotted circle, the damping device comprising at least one pair of damping elements (such as Figure 6 shown) and a stopper corresponding to the damping element,
[0029] Figure 9 A detailed view showing a pair of damping devices when the lower and upper shading elements are in an open position, wherein the damping elements are compressed at the stops, and
[0030] Figure 10 Show Figure 9 Exploded view of the pair of damping devices. DETAILED DESCRIPTION
[0031] Figure 1 A lighting device 10 for a motor vehicle headlamp is shown, wherein the lighting device 10 in the example shown comprises two light modules 20, each of which is arranged to emit light along a light path in a main emission direction X, wherein Figure 2 The optical module 20 can be seen in FIG.
[0032] Furthermore, the lighting device 10 comprises a movable lower shading element 100 and a movable upper shading element 200, wherein, in addition, the lighting device 10 comprises a moving device for switching the lower shading element 100 and the upper shading element 200 relative to each other between a closed position P1 and an open position P2,
[0033] While maintaining the spatial alignment of the upper shading element 100 and the lower shading element 200,
[0034] In the closed position P1 , viewed in the main emission direction X, the lower shading element 100 and the upper shading element 200 are positioned in front of the two light modules 20 and at least partially block the light paths of the two light modules 20 ; and
[0035] In the open position P2 , the lower light shielding element 100 and the upper light shielding element 200 move away from the light paths of the two light modules to release the light paths of the two light modules 20 .
[0036] The upper shading element 100 and the lower shading element 200 are designed as light-emitting elements, which are arranged to radiate light in the closed position P1, preferably in the main emission direction X, and wherein the shading elements 100, 200 designed as light-emitting elements preferably do not radiate light in the open position P2.
[0037] Furthermore, the lighting device 10 includes a frame 300 which is stationary with respect to the movement of the lower shading element 100 and the upper shading element 200 , wherein a moving device is arranged on the frame 300 .
[0038] The lighting device 10 further includes alignment devices 400 for aligning the lower shading element 100 and the upper shading element 200 relative to each other in the closed position P1. Each alignment device 400 includes an alignment element 400a and a guide element 400b complementary to the alignment element 400a. In the illustrated example, the alignment element 400a is arranged on the upper shading element 200, and the guide element 400b is arranged on the lower shading element 100. Each alignment element 400a is elastic, being formed from a plastic, preferably PP-GF30 (polypropylene with 30% glass fiber), which is overmolded with an elastic material, preferably TPE (thermoplastic elastomer).
[0039] exist Figure 5 The alignment element 400a of the alignment device 400 can be seen in FIG. Figure 7 The guiding element 400b of the alignment device 400 can be seen in FIG.
[0040] As in Figure 5 As can be seen in FIG, the alignment element 400a is formed to be approximately conical, wherein the guide element 400b is formed complementary to the alignment element 400a, so that the conical alignment element 400a is supported in an end position in the guide element 400b with a positive fit, as shown in FIG. Figure 4 shown.
[0041] The alignment element 400a is arranged to be inserted into the guide element 400b when the lower shading element 100 and the upper shading element 200 are switched from the open position P2 to the closed position P1 so that the alignment element 400a can be guided by the guide element 400b to an end position in the guide element 400b.
[0042] In the closed position P1 of the lower shading element 100 and the upper shading element 200, the alignment element 400a is connected to the guide element 400b in an end position in the guide element 400b in a form-fitting manner, so that the upper shading element 100 and the lower shading element 200 are protected in the closed position P1 against movement in the main emission direction X and transversely to the main emission direction X. This is for example Figure 3 Can be well identified.
[0043] Furthermore, the lighting device 10 includes a damping device 500 configured to block the lower shading element 100 and the upper shading element 200 when switching to the open position P2, as exemplified by Figure 8 As shown. The damping device 500 includes multiple pairs of elastic damping elements 500a ( Figure 6 As shown) and the stopper 500b corresponding to the damping element 500a. Figure 6 As can be seen in FIG. 5 , the damping element 500 a is formed in a hemispherical shape.
[0044] At least one pair of damping elements and stoppers are assigned to the lower shading element 100 and the upper shading element 200, respectively, wherein when the shading elements 100, 200 are converted to the open position P2, the damping element 500a is stopped at the corresponding stopper 500b, so that the squeezing of the damping element 500a prevents the lower shading element 100 and the upper shading element 200 from being converted to the open position. Figure 10 A pair of damping elements 500 are shown in exploded view, and Figure 9 A pair of damping devices is shown when the shading elements 100, 200 are in an open position.
[0045] Here, a pair of damping elements 500a are arranged at the lower shading element 100 and the upper shading element 200, and a stopper is arranged at the frame 300. In the illustrated example, the damping elements 500a are formed of EPDM (ethylene propylene diene monomer rubber; M-group (synthetic rubber)).
[0046] Description of Reference Numerals
[0047] Lighting fixtures…10
[0048] Optical modules…20
[0049] Lower shading element…100
[0050] Upper shading element…200
[0051] Frame…300
[0052] Alignment device…400
[0053] Alignment element…400a
[0054] Guide element…400b
[0055] Damping device 500
[0056] Damping element…500a
[0057] Stopper…500b
[0058] Closed position…P1
[0059] Open position P2
[0060] Main launch direction...X.
Claims
1. A lighting device (10) for a motor vehicle headlamp, wherein: The lighting device (10) comprises: - at least one light module (20) arranged to emit light along a light path in a main emission direction (X); - a movable lower shading element (100) and a movable upper shading element (200); - a moving device for switching the lower shading element (100) and the upper shading element (200) relative to each other between a closed position (P1) and an open position (P2) while maintaining spatial alignment of the upper shading element (100) and the lower shading element (200), - wherein, in the closed position (P1), viewed in the main emission direction (X), the lower shading element (100) and the upper shading element (200) are positioned in front of at least one of the light modules (20) and at least partially block the light path of at least one of the light modules (20), and - in the open position (P2), the lower shading element (100) and the upper shading element (200) move away from the light path of at least one of the light modules to release the light path of at least one of the light modules (20); - a frame (300) which is stationary relative to the movement of the lower shading element (100) and the upper shading element (200), wherein the movement means are arranged on the frame (300), Its characteristics are: The lighting device (10) comprises at least one alignment device (400) for aligning the lower shading element (100) and the upper shading element (200) with each other in the closed position (P1), wherein at least one alignment device (400) comprises - an alignment element (400a), and - a guiding element (400b) complementary to said alignment element (400a), The alignment element (400a) is configured to be inserted into the guide element (400b) when the lower shading element (100) and the upper shading element (200) are converted from the open position (P2) to the closed position (P1), so that the alignment element (400a) can be guided by the guide element (400b) to the end position of the guide element (400b), wherein the alignment element (400a) is connected to the guide element (400b) in a form-fitting manner in the end position of the guide element (400b) when the lower shading element (100) and the upper shading element (200) are in the closed position (P1), so that the lower shading element (100) and the upper shading element (200) are protected in the closed position (P1) from moving along the main emission direction (X) and transversely to the main emission direction (X).
2. The lighting device according to claim 1, wherein The lower shading element (100) and the upper shading element (200) are configured as light-emitting elements, and the light-emitting elements are configured to radiate light in the closed position (P1).
3. The lighting device according to claim 2, wherein: The light emitting element radiates light in the main emission direction (X).
4. The lighting device according to claim 2 or 3, wherein: The shading element (100, 200) configured as a lighting element does not radiate light in the open position (P2).
5. The lighting device according to any one of claims 1 to 3, wherein: The alignment element (400a) is conical, wherein the guide element (400b) is complementary to the alignment element (400a), so that the conical alignment element (400a) is supported in the guide element (400b) in a form-fitting manner in the end position.
6. The lighting device according to any one of claims 1 to 3, wherein: The lighting device (10) comprises at least two alignment devices (400).
7. The lighting device according to any one of claims 1 to 3, wherein: The alignment element (400a) is arranged on the upper shading element (200) and the guide element (400b) is arranged on the lower shading element (100), or the alignment element (400a) is arranged on the lower shading element (100) and the guide element (400b) is arranged on the upper shading element (200).
8. The lighting device according to any one of claims 1 to 3, wherein: The alignment element (400a) is elastic.
9. The lighting device according to claim 8, wherein: The alignment element (400a) is formed of plastic.
10. The lighting device according to claim 9, wherein: The plastic is PP-GF30.
11. The lighting device according to claim 8, wherein The alignment element is overmolded with an elastic material.
12. The lighting device according to claim 11, wherein The elastic material is TPE.
13. The lighting device according to any one of claims 1-3 and 9-12, wherein: The lighting device (10) includes a damping device (500), which is configured to block the lower shading element (100) and the upper shading element (200) when the shading element (100) is switched to the open position (P2), wherein the damping device (500) includes at least two pairs of elastic damping elements (500a) and stoppers (500b) corresponding to the damping elements (500a), wherein the damping device (500) is configured to block the lower shading element (100) and the upper shading element (200) when the shading element (100) is switched to the open position (P2), wherein the damping device (500) includes at least two pairs of elastic damping elements (500a) and stoppers (500b) corresponding to the damping elements (500a). The components (200) are respectively assigned at least one pair of damping elements (500a) and stoppers (500b), and wherein, when the shading elements (100, 200) are switched to the open position (P2), the damping elements (500a) are stopped at the corresponding stoppers (500b), so that the compression of the damping elements (500a) prevents the lower shading element (100) and the upper shading element (200) from switching to the open position.
14. The lighting device according to claim 7, wherein: The pair of damping elements (500a) are arranged at the lower shading element (100) and the upper shading element (200) and the stopper is arranged at the frame (300), or the damping element (500a) is arranged at the frame (300) and the stopper (500b) is arranged at the lower shading element (100) and the upper shading element (200).
15. The lighting device according to claim 7, wherein: The damping element (500a) is formed of EPDM.
16. The lighting device according to claim 14 or 15, wherein: The damping element (500a) is formed in a hemispherical shape.
17. A motor vehicle headlamp comprising at least one lighting device (10) according to any one of the preceding claims.