CN103342112B - Expressway engineering alarm device for vehicle and alarming method for power thereof - Google Patents
Expressway engineering alarm device for vehicle and alarming method for power thereof Download PDFInfo
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- CN103342112B CN103342112B CN201310329318.XA CN201310329318A CN103342112B CN 103342112 B CN103342112 B CN 103342112B CN 201310329318 A CN201310329318 A CN 201310329318A CN 103342112 B CN103342112 B CN 103342112B
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Abstract
The present invention discloses a kind of expressway engineering alarm device for vehicle and alarming method for power thereof, and ceiling attaching parts, in being horizontally disposed with, is provided with a rotor plate above ceiling attaching parts; Front end and the ceiling attaching parts front portion of rotor plate are hinged, and rotor plate can rotate up and down around this hinge-point, and are fixedly connected with strut bar between the middle part of rotor plate lower face and ceiling attaching parts postmedian; The rear end of rotor plate is unsettled, and is connected with warning sign at this free end, and is fixedly connected with finite place piece between the rearward end of rotor plate lower surface with the rear end of ceiling attaching parts.Alarming device of the present invention and alarming method for power are under the property safety prerequisite ensureing the obstacles such as engineering truck traffic safety, front vehicle traffic safety and street lamp, can clear, observably rearward vehicle prompting front there is engineering truck, so that front vehicle is dodged in time, and the present invention is simple, practical, feasibility is very high, easy to implement, just ingenious by little change.
Description
Technical field
The present invention relates to a kind of expressway engineering alarm device for vehicle, this device is arranged on the ceiling of engineering truck, to realize warning indicators function.
Background technology
Expressway engineering truck (comprise care the car in expressway, Cleaning vehicle for guardrail) operation hourly velocity is comparatively slow, and other car speeds that expressway travels are then general very fast.Therefore, how to carry out operation safely when uninterrupted traffic, and ensure that the property safety of the personal safety and roadside street lamp etc. of front vehicle driver and crew just becomes an important topic.
" highway maintenance safe operation code " specifies: during pavement maintenaince, need 100m place towing safety alarm device after engineering truck.Although above-mentioned operating regulation can play safe warning function to vehicle below theoretically.But, concrete operability is very poor, because safety alarm device distance engineering truck is above apart from general 100m, and there is the sections such as bend unavoidably in expressway, the obstacles such as the street lamp in the safety alarm device of towing and the vehicle at rear or roadside are so just made to interfere, can not safe operation be realized, the property safety of the personal safety of front vehicle driver and crew and roadside street lamp etc. cannot be ensured again, be badly in need of solving above-mentioned technical barrier for this reason.
Summary of the invention
One of technical matters to be solved by this invention is to provide a kind of simple, practical, feasible expressway engineering alarm device for vehicle, and under the premise that security is guaranteed, rearward vehicle prompting exists front engineering truck.
Technical scheme of the present invention is as follows: a kind of expressway engineering alarm device for vehicle, it is characterized in that: comprise ceiling attaching parts (1) and warning sign (4), wherein ceiling attaching parts (1) is in being horizontally disposed with, and is provided with a rotor plate (2) above ceiling attaching parts; Front end and ceiling attaching parts (1) front portion of described rotor plate (2) are hinged, and rotor plate (2) can rotate up and down around this hinge-point, and strut bar (3) is connected with between the postmedian and described ceiling attaching parts (1) middle part of rotor plate (2) lower face, the two ends of this strut bar (3) are hinged with corresponding ceiling attaching parts (1) and rotor plate (2);
The rear end of described rotor plate (2) is unsettled, and be connected with described warning sign (4) at this free end, and be fixedly connected with finite place piece (5) between the rearward end of rotor plate (2) lower surface with the rear end of described ceiling attaching parts (1).
Before operation, the ceiling of expressway engineering truck (C) installs additional an alarming device of the present invention, the length direction of the ceiling attaching parts (1) of this alarming device is consistent with the length direction of expressway engineering truck (C), this ceiling attaching parts (1) is fixed with the ceiling of expressway engineering truck (C), and described warning sign (4) is towards the afterbody of expressway engineering truck (C), so just make the aspect ratio of this alarming device and warning sign (4) higher, and this alarming device follows engineering truck synchronizing moving together, so just this alarming device is made to be not easy to interfere with the vehicle at rear, thus ensure the safety of engineering truck and front vehicle.
In addition, because the engineering truck working direction being provided with this device mainly moves forward, when bar contact such as the upper face of rotor plate (2) and the street lamps in roadside, obstacle can to pressing down rotor plate (2), and then pressure rotor plate (2) hinge-point around its front end is rotated backward, so just can prevent together with obstacle from hanging over rotor plate (2), can avoid damaging the obstacles such as street lamp, can prevent from again damaging this alarming device, ensure the normal alarm function of this alarming device, the safety of expressway engineering truck (C) can also be ensured further.
When obstacle and rotor plate (2) disengage, rotor plate (2) rotates reset forward under the effect of described strut bar (4), and the angle that locating part (5) restriction rotor plate (2) rotates forward, and then the height of restriction rotor plate (2) free end, and the warning sign (4) of rotor plate (2) free end is made to remain on proper height.Because the whole height of expressway engineering truck (C) is higher, and the ceiling of warning sign (4) distance expressway engineering truck (C) has certain altitude, vehicle below so just can be made just easily very observably to observe warning sign (4), and then notice that there is engineering truck in front just in operation, thus dodge in time, so just achieve warning indicators function well.
Adopt the alarming device described in above technical scheme, the present invention is under the property safety prerequisite ensureing the obstacles such as engineering truck traffic safety, front vehicle traffic safety and street lamp, can clear, observably rearward vehicle prompting front there is engineering truck, so that front vehicle is dodged in time, and this alarming device is simple, practical, feasibility is very high, easy to implement, by little change with regard to ingenious, to effectively overcome prior art defect.
As optimal design, described ceiling attaching parts (1) is by the H type structure of steel-pipe welding, and its left longeron and right vertical beam all have bolt through-hole, and the straight-line distance≤2m between left longeron and right vertical beam; The opposite site of the left longeron of described ceiling attaching parts (1) and right vertical beam is welded with an axle sleeve (6) respectively, rotating shaft on described rotor plate (2) left and right side, front end is inserted in the axle sleeve (6) of respective side respectively, and with this axle sleeve (6) normal-running fit.
Adopt above structure, in the present invention, ceiling attaching parts (1) adopts H type structure to be not only convenient to draw materials, make and reduce costs, and under the prerequisite ensureing its structural strength, effectively can reduce its weight, and then prevent the ceiling damaging expressway engineering truck (C) by pressure.In addition, straight-line distance≤2m between the left longeron of described ceiling attaching parts (1) and right vertical beam, the width of ceiling attaching parts (1) so just can be made to be no more than the width of expressway roof of engineering truck, thus avoid further producing with the vehicle on the obstacle such as the street lamp of both sides, expressway and road interfering, and then ensure the property safety of the obstacles such as engineering truck traffic safety, front vehicle traffic safety and street lamp further.In addition, described rotor plate (2) is hinged by rotating shaft shaft sleeve structure and ceiling attaching parts (1), can ensure like this to connect reliably, can ensure again to rotate flexibly, not easily there is clamping stagnation, ensure rotor plate (2) can before and after rotate functional requirement.
As preferably, the number of described strut bar (3) is two, these two strut bars (3) are arranged side by side in left and right, and one end of two strut bars (3) is hinged with the respective side of described rotor plate (2) lower face respectively, its other end is hinged with the respective side of described ceiling attaching parts (1) intermediate transverse girder respectively.
Adopt above structure, two described strut bars (3) can head on forward rotor plate (2) from left and right side simultaneously, thus make rotor plate (2) avoid when rotating, catching phenomenon occurring because of both sides unbalance stress.
In the present invention, described rotor plate (2) is plank, its upper surface is smooth surface, the left and right side of this rotor plate free end is provided with an adapter sleeve (7) respectively relatively, and the left and right end of pipe link (8) inserts in the adapter sleeve (7) of respective side respectively; Described warning sign (4) is provided with high-brightness LED lamp, stroboscopic lamp and caution slogan, and the top empty set of this warning sign (4) is on described pipe link (8).
Adopt above structure, described rotor plate (2) selects plank to be in order to loss of weight, its upper surface specially makes smooth surface, it is the friction force in order to reduce rotor plate (2) upper surface, the service life of rotor plate (2) can not only be ensured like this, the more important thing is and can prevent together with the obstacles such as the street lamp in rotor plate (2) and roadside from hanging over.In addition, the top empty set of described warning sign (4) is in described pipe link (8), so just can ensure that warning sign (4) is in vertical state all the time, warning sign (4) so just can be made to be positioned at best warning indicators position all the time, so that the driver and crew of front vehicle check in time, observably.What need special proposition is, described warning sign (4) is provided with high-brightness LED lamp, stroboscopic lamp and caution slogan, so just by different warning indicators modes allow the driver and crew of front vehicle clear, observably check, and then notice that there is engineering truck in front just in operation, to dodge in time.
As a kind of embodiment of locating part (5), described locating part (5) is projection screen, one end of this projection screen and the rearward end of described rotor plate (2) lower face are fixed, and the rear end of its other end and described ceiling attaching parts (1) is fixed.
In the present embodiment, described locating part (5) is preferably projection screen, not only because projection screen is not easily damaged, can be reliably spacing, and because take up room little when projection screen is packed up, be convenient to arrange, also because projection screen is drawn materials conveniently, low price.
As another embodiment of locating part (5), described locating part (5) is projection screen, one end of this projection screen and the rearward end of described rotor plate (2) lower face are fixed, its other end is around on the output revolving shaft of projector motor, and this projector motor is installed in the rear end of described ceiling attaching parts (1).
In the present embodiment, described locating part (5) is preferably projection screen, not only because projection screen is not easily damaged, can be reliably spacing, and because take up room little when projection screen is packed up, be convenient to arrange, also because projection screen is drawn materials conveniently, low price.In addition, user can carry out the height of active accommodation rotor plate (2) free end as required by projector motor; Further, when engineering truck is in non-operating condition, farthest reduce the height of adjustment rotor plate (2) free end by controlling projector motor, thus be convenient to further ensure safety.
Two of technical matters to be solved by this invention is to provide a kind of simple, practical, feasible expressway engineering truck alarming method for power, and under the premise that security is guaranteed, rearward vehicle prompting exists front engineering truck.
A kind of expressway engineering truck alarming method for power, comprise expressway engineering truck (C), it is characterized in that: the ceiling of described expressway engineering truck (C) adds an expressway engineering alarm device for vehicle, the structure of this alarming device adopts aforesaid expressway engineering alarm device for vehicle, and ceiling attaching parts (1) in this alarming device is arranged along the length direction of expressway engineering truck (C), and fix with the ceiling of expressway engineering truck (C), and warning sign (4) in this alarming device is towards the afterbody of expressway engineering truck (C).
Before operation, the ceiling of expressway engineering truck (C) installs additional an expressway engineering alarm device for vehicle, the structure of this alarming device as claimed in claim 5, ceiling attaching parts (1) in this alarming device is arranged along the length direction of expressway engineering truck (C), and fix with the ceiling of expressway engineering truck (C), and warning sign (4) in this alarming device is towards the afterbody of expressway engineering truck (C), so just make the aspect ratio of alarming device and warning sign (4) higher, and alarming device follows engineering truck synchronizing moving together, so just alarming device is made to be not easy to interfere with the vehicle at rear, thus ensure the safety of engineering truck and front vehicle.
In addition, because the engineering truck working direction being provided with alarming device mainly moves forward, when bar contact such as the upper face of rotor plate (2) and the street lamps in roadside, obstacle can to pressing down rotor plate (2), and then pressure rotor plate (2) hinge-point around its front end is rotated backward, so just can prevent together with obstacle from hanging over rotor plate (2), can avoid damaging the obstacles such as street lamp, can prevent from again damaging alarming device, ensure the normal alarm function of alarming device, the safety of expressway engineering truck (C) can also be ensured further.
When obstacle and rotor plate (2) disengage, rotor plate (2) rotates reset forward under the effect of described strut bar (4), and the angle that locating part (5) restriction rotor plate (2) rotates forward, and then the height of restriction rotor plate (2) free end, and the warning sign (4) of rotor plate (2) free end is made to remain on proper height.Because the whole height of expressway engineering truck (C) is higher, and the ceiling of warning sign (4) distance expressway engineering truck (C) has certain altitude, vehicle below so just can be made just easily very observably to observe warning sign (4), and then notice that there is engineering truck in front just in operation, thus dodge in time, so just achieve warning indicators function well.
Adopt the alarming method for power described in above technical scheme, this alarming method for power is under the property safety prerequisite ensureing the obstacles such as engineering truck traffic safety, front vehicle traffic safety and street lamp, can clear, observably rearward vehicle prompting front there is engineering truck, so that front vehicle is dodged in time, and this alarming method for power is simple, practical, feasibility is very high, easy to implement, improvement cost is low, to the change of engineering truck and damage little, by little change just ingenious, the defect that effectively overcomes prior art.
Beneficial effect: alarming device of the present invention and alarming method for power are under the property safety prerequisite ensureing the obstacles such as engineering truck traffic safety, front vehicle traffic safety and street lamp, can clear, observably rearward vehicle prompting front there is engineering truck, so that front vehicle is dodged in time, and the present invention is simple, practical, feasibility is very high, easy to implement, by little change with regard to ingenious, to effectively overcome prior art defect.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of the embodiment of the present invention 1;
Fig. 2 is the birds-eye view of Fig. 1;
Fig. 3 is the schematic diagram of the embodiment of the present invention 2;
Fig. 4 is the birds-eye view of Fig. 3.
Detailed description of the invention
Below in conjunction with drawings and Examples, the invention will be further described:
Embodiment 1
As shown in Figure 1, 2, a kind of expressway engineering alarm device for vehicle, is formed primarily of ceiling attaching parts 1, rotor plate 2, strut bar 3, warning sign 4, locating part 5, axle sleeve 6, adapter sleeve 7 and pipe link 8.Wherein, described ceiling attaching parts 1 is in being horizontally disposed with, and this ceiling attaching parts 1 is by the H type structure of steel-pipe welding, and has left longeron, right vertical beam and intermediate transverse girder.Further, the left longeron of described ceiling attaching parts 1 and right vertical beam all have bolt through-hole, during installation, ceiling attaching parts 1 is by being located on the ceiling being bolted to expressway engineering truck in this bolt through-hole.In addition, the straight-line distance≤2m between the left longeron of ceiling attaching parts 1 and right vertical beam, the general requirement of its straight-line distance is the width being not more than roof of engineering truck, and its concrete straight-line distance can be preferably 1.8,1.5m, 1.2m.
Can find out from Fig. 1,2, the top of described ceiling attaching parts 1 is provided with a rotor plate 2, and this rotor plate 2 is preferably plank.In order to reduce friction force, special the upper surface of rotor plate 2 is made smooth side, if required also can in this upper surface coating lubricating oil, to reduce friction coefficient further.
Front end and ceiling attaching parts 1 front portion of described rotor plate 2 are hinged, and rotor plate 2 can rotate up and down around this hinge-point.In the present embodiment, the opposite site of the left longeron of described ceiling attaching parts 1 and right vertical beam is welded with an axle sleeve 6 respectively, rotating shaft on the left surface of rotor plate 2 front end is inserted in the axle sleeve 6 in left side, rotating shaft on the right flank of rotor plate 2 front end is inserted in the axle sleeve 6 on right side, these two rotating shafts respectively with corresponding axle sleeve 6 normal-running fit, thus make the front end of rotor plate 2 and ceiling attaching parts 1 anterior hinged.
Also can find out from Fig. 1,2, in addition, be connected with strut bar 3 between in the middle part of the postmedian and ceiling attaching parts 1 of described rotor plate 2 lower face, the two ends of this strut bar 3 are hinged with corresponding ceiling attaching parts 1 and rotor plate 2.As preferably, the number of described strut bar 3 is two, and these two strut bars 3 are arranged side by side in left and right.Wherein, strut bar 3 one end in left side and the limit, left side of described rotor plate 2 lower face hinged, hinged on the left of the intermediate transverse girder of strut bar 3 other end on the left of this and described ceiling attaching parts 1 intermediate transverse girder.Meanwhile, strut bar 3 one end on right side and the right edge of described rotor plate 2 lower face hinged, the right side of strut bar 3 other end on the right side of this and described ceiling attaching parts 1 intermediate transverse girder is hinged.When rotating after rotor plate 2 pressurized, two described strut bars 3 also rotate, and when rotor plate 2 rotates into horizontality, two described strut bars 3 also followed by and rotate into horizontality.When rotor plate after distress resolves 2 upwards rotates, two described strut bars 3 also upwards rotate, thus support rotor plate 2.
The rear end of described rotor plate 2 is unsettled, and is connected with one piece of described warning sign 4 at this free end, and warning sign 4 is provided with high-brightness LED lamp, stroboscopic lamp and caution slogan.In the present embodiment, the left and right side of above-mentioned rotor plate 2 free end is provided with an adapter sleeve 7 respectively relatively, and the left end of pipe link 8 and right-hand member insert in the adapter sleeve 7 of respective side respectively, and the top empty set of described warning sign 4 is on this pipe link 8.
Finally also can find out from Fig. 1,2, between the rearward end of described rotor plate 2 lower surface and the rear end of ceiling attaching parts 1, be fixedly connected with a locating part 5.In the present embodiment, described locating part 5 is preferably projection screen, and one end of this projection screen and the rearward end of described rotor plate 2 lower face are fixed, and the rear end of its other end and described ceiling attaching parts 1 is fixed.
Embodiment 2
Composition graphs 1,2, and can find out with reference to Fig. 3 and 4, the expressway engineering alarm device for vehicle shown in the present embodiment, is formed primarily of ceiling attaching parts 1, rotor plate 2, strut bar 3, warning sign 4, locating part 5, axle sleeve 6, adapter sleeve 7 and pipe link 8.
In the present embodiment, described locating part 5 is projection screen, one end of this projection screen and the rearward end of described rotor plate 2 lower face are fixed, and its other end is around on the output revolving shaft of projector motor, and this projector motor is installed in the rear end of described ceiling attaching parts 1.All the other structures of the present embodiment are identical with embodiment 1, do not repeat at this.
Two of object of the present invention is to provide a kind of expressway engineering truck alarming method for power, and this alarming method for power comprises ready-made expressway engineering truck C.The ceiling of described expressway engineering truck C adds an expressway engineering alarm device for vehicle, the structure of this alarming device adopts aforesaid expressway engineering alarm device for vehicle, and ceiling attaching parts 1 in this alarming device is arranged along the length direction of expressway engineering truck C, and ceiling attaching parts 1 is fixed with the ceiling of expressway engineering truck C, and warning sign 4 in this alarming device is towards the afterbody of expressway engineering truck C.
The foregoing is only preferred embodiment of the present invention, is not restriction with the present invention, and all any amendments done within the spirit and principles in the present invention, equivalent replacement and improvement etc., all should be included within protection scope of the present invention.
Claims (6)
1. an expressway engineering alarm device for vehicle, it is characterized in that: comprise ceiling attaching parts (1) and warning sign (4), wherein ceiling attaching parts (1) is in being horizontally disposed with, and is provided with a rotor plate (2) above ceiling attaching parts; Front end and ceiling attaching parts (1) front portion of described rotor plate (2) are hinged, and rotor plate (2) can rotate up and down around this hinge-point, and strut bar (3) is connected with between the postmedian and described ceiling attaching parts (1) middle part of rotor plate (2) lower face, the two ends of this strut bar (3) are hinged with corresponding ceiling attaching parts (1) and rotor plate (2);
The rear end of described rotor plate (2) is unsettled, and be connected with described warning sign (4) at this free end, and be fixedly connected with finite place piece (5) between the rearward end of rotor plate (2) lower surface with the rear end of described ceiling attaching parts (1);
Described ceiling attaching parts (1) is by the H type structure of steel-pipe welding, and its left longeron and right vertical beam all have bolt through-hole, and the straight-line distance≤2m between left longeron and right vertical beam; The opposite site of the left longeron of described ceiling attaching parts (1) and right vertical beam is welded with an axle sleeve (6) respectively, rotating shaft on described rotor plate (2) left and right side, front end is inserted in the axle sleeve (6) of respective side respectively, and with this axle sleeve (6) normal-running fit.
2. expressway according to claim 1 engineering alarm device for vehicle, it is characterized in that: the number of described strut bar (3) is two, these two strut bars (3) are arranged side by side in left and right, and one end of two strut bars (3) is hinged with the respective side of described rotor plate (2) lower face respectively, its other end is hinged with the respective side of described ceiling attaching parts (1) intermediate transverse girder respectively.
3. expressway according to claim 1 engineering alarm device for vehicle, it is characterized in that: described rotor plate (2) is plank, its upper surface is smooth surface, the left and right side of this rotor plate free end is provided with an adapter sleeve (7) respectively relatively, and the left and right end of pipe link (8) inserts in the adapter sleeve (7) of respective side respectively; Described warning sign (4) is provided with high-brightness LED lamp, stroboscopic lamp and caution slogan, and the top empty set of this warning sign (4) is on described pipe link (8).
4. according to the arbitrary described expressway engineering alarm device for vehicle of claims 1 to 3, it is characterized in that: described locating part (5) is projection screen, one end of this projection screen and the rearward end of described rotor plate (2) lower face are fixed, and the rear end of its other end and described ceiling attaching parts (1) is fixed.
5. according to the arbitrary described expressway engineering alarm device for vehicle of claims 1 to 3, it is characterized in that: described locating part (5) is projection screen, one end of this projection screen and the rearward end of described rotor plate (2) lower face are fixed, its other end is around on the output revolving shaft of projector motor, and this projector motor is installed in the rear end of described ceiling attaching parts (1).
6. an expressway engineering truck alarming method for power, comprise expressway engineering truck (C), it is characterized in that: the ceiling of described expressway engineering truck (C) adds an expressway engineering alarm device for vehicle, the structure of this alarming device as claimed in claim 5, and ceiling attaching parts (1) in this alarming device is arranged along the length direction of expressway engineering truck (C), and fix with the ceiling of expressway engineering truck (C), and warning sign (4) in this alarming device is towards the afterbody of expressway engineering truck (C).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310329318.XA CN103342112B (en) | 2013-07-31 | 2013-07-31 | Expressway engineering alarm device for vehicle and alarming method for power thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310329318.XA CN103342112B (en) | 2013-07-31 | 2013-07-31 | Expressway engineering alarm device for vehicle and alarming method for power thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103342112A CN103342112A (en) | 2013-10-09 |
| CN103342112B true CN103342112B (en) | 2015-12-23 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201310329318.XA Expired - Fee Related CN103342112B (en) | 2013-07-31 | 2013-07-31 | Expressway engineering alarm device for vehicle and alarming method for power thereof |
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| CN (1) | CN103342112B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106149581A (en) * | 2016-06-29 | 2016-11-23 | 戴维峰 | Road safety warning method based on 3D holographic imaging technology |
| CN110042777A (en) * | 2019-05-21 | 2019-07-23 | 淮阴师范学院 | A kind of vehicle-mounted warning rack of highway |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4259660A (en) * | 1978-10-10 | 1981-03-31 | Dorothy Oliver | Retractable roof top sign for automotive vehicles |
| DE3709662A1 (en) * | 1987-03-24 | 1988-10-06 | Loutfi Kelleni | Emergency signalling device, in particular hazard-warning triangle, in particular for use in road traffic |
| DE4312421C1 (en) * | 1993-04-16 | 1994-05-19 | Roesler Rainhardt | Road traffic warning and guidance device - directs traffic signs and text recorded on photographic medium onto back projection screen |
| CN101169578A (en) * | 2007-10-31 | 2008-04-30 | 梁坚平 | Vehicle-mounted back projected picture advertisement playing device |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7825790B2 (en) * | 2008-04-15 | 2010-11-02 | Lonestar Inventions, Lp | Emergency vehicle light bar with message display |
-
2013
- 2013-07-31 CN CN201310329318.XA patent/CN103342112B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4259660A (en) * | 1978-10-10 | 1981-03-31 | Dorothy Oliver | Retractable roof top sign for automotive vehicles |
| DE3709662A1 (en) * | 1987-03-24 | 1988-10-06 | Loutfi Kelleni | Emergency signalling device, in particular hazard-warning triangle, in particular for use in road traffic |
| DE4312421C1 (en) * | 1993-04-16 | 1994-05-19 | Roesler Rainhardt | Road traffic warning and guidance device - directs traffic signs and text recorded on photographic medium onto back projection screen |
| CN101169578A (en) * | 2007-10-31 | 2008-04-30 | 梁坚平 | Vehicle-mounted back projected picture advertisement playing device |
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| CN103342112A (en) | 2013-10-09 |
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