Energy-saving dimming LED street lamp

Abstract

The invention discloses an energy-saving dimming LED street lamp, and particularly relates to the technical field of energy-saving lighting equipment, the energy-saving dimming LED street lamp comprises lamp brackets which are symmetrically hinged, and a low-brightness lamp panel, a medium-brightness lamp panel and a high-brightness lamp panel which are distributed from the adjacent side to the other side are sequentially mounted on the two lamp brackets; the two lamp holders are driven to turn over so as to be switched in a V-shaped distribution state and an inverted V-shaped distribution state, and when the two lamp holders are switched to be in the inverted V shape, the highlight lamp panel is extinguished. According to the energy-saving dimming LED street lamp provided by the invention, the two lamp brackets are overturned into a V shape to enlarge the irradiation surfaces of the low-brightness lamp panel, the middle-brightness lamp panel and the high-brightness lamp panel, and the two lamp brackets are overturned again into an inverted V shape to extinguish the high-brightness lamp panel, so that the brightness of the street lamp is reduced, and meanwhile, the irradiation surfaces of the low-brightness lamp panel and the middle-brightness lamp panel are narrowed; and then the light scattering transparent plate is rotated to be located below the inverted V-shaped lamp bracket, so that the brightness of the periphery of a lamplight irradiation surface is further weakened, and the influence on rest of surrounding residents is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of energy-saving lighting devices, and more particularly to an energy-saving dimming LED street lamp. Background Art

[0002] Compared with traditional lighting devices, LED street lamps have the characteristics of low energy consumption, and can significantly reduce power consumption under the condition of providing the same light output, thereby reducing electricity bills.

[0003] According to the Chinese published patent publication number CN202190448U, the publication date: April 11, 2012, there is disclosed a PWM temperature-controlled street lamp, which is composed of a lamp housing, an aluminum substrate, a temperature probe, a pulse width modulation circuit connection, a PWM constant current drive circuit, a PWM constant current drive circuit, and an LED. An aluminum substrate is arranged in the lamp housing, and a temperature probe and a plurality of LEDs are installed on the aluminum substrate. The temperature probe is connected to the pulse width modulation circuit through a connecting wire, the pulse width modulation circuit is connected to the PWM constant current drive circuit, and the PWM constant current drive circuit is connected to the LED lamp.

[0004] In the prior art including the above patent, at present, the adjustment of the brightness of street lamps is involved in the use of LED street lamps. As a mature technical means, the PWM (pulse width modulation) control technology can effectively control the brightness of the lamp to achieve the effect of energy saving. As for the street lamps in the community, due to the large number of residents, effective adjustment of the use of LEDs is required. In order to increase the illumination area of the LEDs, generally two lighting methods are adopted. One is to increase the height of the LEDs, and the other is to have a certain upward tilt angle of the LEDs, so as to improve the wider illumination area of the LEDs to cope with the period from six o'clock to ten o'clock during the peak period of the community population flow. However, this LED layout method has certain drawbacks. For the low-rise households in the LED illumination area, the fixed tilt angle will cause the light to continuously shine into the households. Especially during the period from ten o'clock at night to six o'clock in the morning of the next day, most of which are the rest times of the residents. At this stage, the continuous lighting of the street lamps will affect the rest of the residents. Although the PWM (pulse width modulation) control technology can reduce the brightness of the light, because of the fixed tilt angle surface of the LED lamp body, it still has a relatively wide light radiation area at low illumination levels, so it will still have a certain impact on the rest of the residents in a large area near the LED lamp body. Summary of the Invention

[0005] The purpose of the present invention is to provide an energy-saving dimming LED street lamp to solve the above technical problems.

[0006] To achieve the above object, the present invention provides the following technical solution: An energy-saving dimming LED street lamp, comprising lamp brackets symmetrically and hingedly arranged, on which a low-brightness lamp board, a medium-brightness lamp board and a high-brightness lamp board are successively installed from the adjacent side to the other side; The two lamp brackets are driven to flip to switch between two distribution states of "V" shape and "∧" shape, and the high-brightness lamp board is turned off when switched to the "∧" shape; It further comprises a rotatably arranged diffusing transparent plate, which is located below the lamp bracket when switched to the "∧" shape.

[0007] Preferably, there are two diffusing transparent plates which are respectively fixedly installed on the lamp brackets, and the end distance between the two diffusing transparent plates is adjustable when switching between the two distribution states of "V" shape and "∧" shape.

[0008] Preferably, a hanging plate is fixedly installed on the outer wall of the hinge shaft arranged on the lamp bracket, and a lamp shade is arranged on the lamp bracket. A main electric push rod fixedly installed in the lamp shade and the two hanging plates are fixedly connected by a pulling member for deflecting the hinge shaft.

[0009] Preferably, the pulling member is fixedly installed on a positioning block arranged at the output end of the main electric push rod, and a clamping plate hinged in the lamp shade is movably arranged in a row of teeth arranged on the positioning block.

[0010] Preferably, a dial rod movably connected to the clamping plate is slidably arranged in a sliding cavity opened on the lamp shade, and a single air valve and fine pores respectively communicated with the sliding cavity are arranged on the lamp shade. After the positioning block pushes the dial rod to reset, the single air valve closes and the clamping plate disengages from the row of teeth.

[0011] Preferably, air inlet openings located on one side of the lamp bracket are respectively opened on the outer walls of opposite sides of the lamp shade. Elastic plates which are symmetrically fixedly installed in the lamp shade and inclined towards the inside of the lamp shade to block the air inlet openings are provided, and narrow air openings are opened on the side of the elastic plates close to the lamp bracket.

[0012] Preferably, it comprises heat dissipation plates symmetrically and hingedly arranged and composed of short plates and long plates. When the two lamp brackets are in the "V" shape, the short plates are attached to the high-brightness lamp board, and when the two lamp brackets are in the "∧" shape, the lamp brackets push the heat dissipation plates so that the long plates are attached to the low-brightness lamp board and the medium-brightness lamp board.

[0013] Preferably, the elastic plates are movably arranged on the heat dissipation plates, and when the two lamp brackets are in the "∧" shape, the air guide openings opened on the short plates are communicated with the air inlet openings.

[0014] Preferably, it comprises a mounting block, and reflective walls are symmetrically arranged on the outer walls of opposite sides of the mounting block. Elastic reflective plates symmetrically and movably arranged in the mounting block extend out of the bottom of the mounting block when the two lamp brackets are in the "∧" shape.

[0015] Preferably, when the two lamp brackets are switched from a "V" shape to a "∧" shape, their end parts respectively push against the raised parts provided on the elastic reflector, and the raised parts are deformed to drive the bottom end of the elastic reflector to extend out of the bottom of the mounting block.

[0016] In the above technical solution, an energy-saving dimming LED street lamp provided by the present invention has the following beneficial effects: by flipping the two lamp brackets into a "V" shape to expand the irradiation surfaces of the low-brightness lamp board, the medium-brightness lamp board, and the high-brightness lamp board, and by flipping the two lamp brackets again to form a "∧" shape and turning off the high-brightness lamp board, at this time the brightness of the street lamp is reduced, and at the same time the irradiation surfaces of the low-brightness lamp board and the medium-brightness lamp board are narrowed. Then, by rotating the light-diffusing transparent plate below the lamp brackets in the "∧" shape, the brightness around the light irradiation surface is further weakened, so as to reduce the impact on the rest of the surrounding residents. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required to be used in the embodiments. Obviously, the drawings described below are only some embodiments recorded in the present invention. For those of ordinary skill in the art, other drawings can also be obtained according to these drawings.

[0018] Figure 1 Schematic diagram of the overall structure of the lamp post provided by the embodiment of the present invention; Figure 2 Schematic diagram of the side structure of the lamp post provided by the embodiment of the present invention; Figure 3 Schematic diagram of the bottom structure of the lamp cover provided by the embodiment of the present invention; Figure 4 Schematic diagram of the sectional structure of the lamp cover provided by the embodiment of the present invention; Figure 5 Schematic diagram of the enlarged partial sectional structure of the lamp cover provided by the embodiment of the present invention; Figure 6 Schematic diagram of the sectional structure of the lamp bracket provided by the embodiment of the present invention; Figure 7 Schematic diagram of the sectional structure of the positioning block provided by the embodiment of the present invention; Figure 8 Provided by the embodiment of the present invention Figure 2 Enlarged structure diagram at position A; Figure 9 Provided by the embodiment of the present invention Figure 3 Enlarged structure diagram at position B; Figure 10 Provided by the embodiment of the present invention Figure 4 Enlarged structure diagram at position C; Figure 11 Provided by the embodiment of the present invention Figure 10Schematic diagram of the enlarged structure at position D in Figure 12 Provided by an embodiment of the present invention Figure 5 Schematic diagram of the enlarged structure at position E in Figure 13 Provided by an embodiment of the present invention Figure 6 Schematic diagram of the enlarged structure at position F in Figure 14 Provided by an embodiment of the present invention Figure 12 Schematic diagram of the enlarged structure at position G in Figure 15 Provided by an embodiment of the present invention Figure 13 Schematic diagram of the enlarged structure at position H in Figure 16 Schematic cross-sectional structure diagram of the low-brightness lamp board and the medium-brightness lamp board provided by an embodiment of the present invention.

[0019] Explanation of reference numerals: 1, lamp post; 2, cleaning cotton pad; 3, lamp holder; 4, main electric push rod; 5, clamping plate; 6, elastic reflector; 7, long plate; 11, lamp cover; 12, storage cavity; 13, extension table; 14, heat exhaust port; 15, mounting block; 16, guiding groove; 17, air injection port; 18, functional cavity; 19, reflective wall; 31, high-brightness lamp board; 32, medium-brightness lamp board; 33, low-brightness lamp board; 34, diffusing transparent plate; 35, fitting sponge pad; 36, hinge shaft; 37, hanging plate; 38, first torsion spring member; 39, pulling member; 41, first guiding shaft; 42, second guiding shaft; 43, phase-changing shaft; 44, positioning block; 45, sliding plate; 46, pulling spring; 47, row of teeth; 51, waist groove; 52, second torsion spring member; 53, lever; 54, convex rod; 55, extension rod; 56, sliding cavity; 57, single air valve; 58, fine pores; 61, convex portion; 71, short plate; 72, air guiding port; 73, elastic plate; 74, narrow air port. Detailed implementation manners

[0020] In order to enable those skilled in the art to better understand the technical solutions of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings.

[0021] As Figure 1-16 shown, an energy-saving dimming LED street lamp includes lamp holders 3 symmetrically and hingedly arranged, and a low-brightness lamp board 33, a medium-brightness lamp board 32, and a high-brightness lamp board 31 are sequentially installed on the two lamp holders 3 and distributed from the adjacent side to the other side; The two lamp holders 3 are driven to flip to switch between two distribution states of "V" shape and "∧" shape, and the high-brightness lamp board 31 is turned off when switched to the "∧" shape; It further includes a rotatably arranged diffusing transparent plate 34, and when switched to the "∧" shape, it is located below the lamp holder 3.

[0022] Specifically, it includes a lamp post 1 and a lampshade 11 bolted and installed on its top. Two lamp brackets 3 are symmetrically and hingedly arranged inside the lampshade 11. The low-brightness lamp board 33, the medium-brightness lamp board 32, and the high-brightness lamp board 31 are respectively bolted or screwed and installed on the two lamp brackets 3. When it is the peak period of pedestrian flow from six to ten o'clock at night, by synchronously flipping the two lamp brackets 3, the adjacent ends of the two lamp brackets 3 are synchronously turned down to form a state similar to a "V" shape. At this time, the low-brightness lamp board 33, the medium-brightness lamp board 32, and the high-brightness lamp board 31 are turned out of the lampshade 11 more to expand their irradiation surfaces. And because the low-brightness lamp board 33 is located on one side where the two lamp brackets 3 are adjacent, as Figure 8 shown, at this time, by standing on the side of the lamp post 1, one can first see the low-brightness lamp board 33 and the medium-brightness lamp board 32 that are turned to form a state similar to a "V" shape. Then, during the process of gradually approaching the lamp post 1, pedestrians will gradually be under the lampshade 11 and then can see the high-brightness lamp board 31. Therefore, after pedestrians first see the low-brightness lamp board 33 and the medium-brightness lamp board 32 and then see the high-brightness lamp board 31 after approaching the lamp post 1, the light that pedestrians visually feel becomes gradually brighter, reducing the state of dizziness caused by the instantaneous irradiation of all the bright lights of the street lamp on pedestrians' eyeballs when pedestrians are walking, so that pedestrians can slowly accept the light brightness of the street lamp.

[0023] Furthermore, during the period from ten o'clock at night to six o'clock in the morning when residents are sleeping, by synchronously flipping the two lamp brackets 3 again, the adjacent ends of the two lamp brackets 3 are synchronously turned up to form a state similar to a "∧" shape. At this time, by turning off the high-brightness lamp board 31 to reduce the light brightness of the street lamp and at the same time saving the use of electric energy, and by flipping the two lamp brackets 3 into the lampshade 11 to narrow the irradiation surfaces of the low-brightness lamp board 33 and the medium-brightness lamp board 32. At the same time, the lampshade 11 can also block the low-brightness lamp board 33 and the medium-brightness lamp board 32 to reduce the light pollution to surrounding households. And because the adjacent ends of the two lamp brackets 3 are synchronously turned up to form a state similar to a "∧", at this time, the irradiation surfaces of the low-brightness lamp board 33 and the medium-brightness lamp board 32 on the two lamp brackets 3 intersect, and thus the brightness in the intersection area will increase. Therefore, when narrowing the irradiation surface of the street lamp light and turning off the high-brightness lamp board 31 to reduce the light intensity, the light of the low-brightness lamp board 33 and the medium-brightness lamp board 32 converges to narrow the irradiation surface, and at the same time, the light intensity in the area where their irradiation surfaces intersect increases, so that when some pedestrians need street lamps, the street lamp can provide a light with sufficient light intensity, thereby improving the applicability of the street lamp.

[0024] Even further, when the two lamp brackets 3 are switched to the "∧" shape, at this time, the light-diffusing transparent plate 34 rotates to be located below the lamp bracket 3, and thus the light-diffusing transparent plate 34 is used to weaken to a certain extent the irradiation brightness of the low-brightness lamp board 33 and the medium-brightness lamp board 32 on the lamp bracket 3 to the surrounding area, and further reduce the impact of light pollution on surrounding households.

[0025] The two lamp brackets 3 can be driven to turn respectively by motors; they can also be driven respectively by electric push rods cooperating with connecting rods; or any other ways known to those skilled in the art to control the turning of the two lamp brackets 3 are acceptable.

[0026] The astigmatic transparent plate 34 can be rotated manually; it can also be driven by a motor; or any other ways known to those skilled in the art to control the rotation of the astigmatic transparent plate 34 are acceptable.

[0027] The high-brightness lamp board 31 can be turned off by the STM32 microcontroller to respectively connect the low-brightness lamp board 33, the medium-brightness lamp board 32 and the high-brightness lamp board 31 through circuits. The STM32 microcontroller is electrically connected to the power supply for supplying power to the street lamp. By using the timer and circuit switch on the STM32 microcontroller, when the time is 6:00 p.m. at night, the STM32 microcontroller cooperates with the circuit switch to turn on the low-brightness lamp board 33, the medium-brightness lamp board 32 and the high-brightness lamp board 31 simultaneously and can control the motor or electric push rod for driving the lamp bracket 3 to turn. At this time, the two lamp brackets 3 are driven to turn into a "V" shape, and the low-brightness lamp board 33, the medium-brightness lamp board 32 and the high-brightness lamp board 31 light up respectively. When the time is 10:00 p.m. at night, the STM32 microcontroller controls the motor or electric push rod for driving the lamp bracket 3 to turn again so that the two lamp brackets 3 are driven to turn into a "∧" shape. At the same time, the STM32 microcontroller uses the program in its chip to control the circuit switch and turn off the high-brightness lamp board 31 alone. When the time is 6:00 a.m. in the morning, the STM32 microcontroller controls the circuit switch again to turn off the remaining low-brightness lamp board 33 and medium-brightness lamp board 32.

[0028] Or the low-brightness lamp board 33, the medium-brightness lamp board 32, the high-brightness lamp board 31 and the motors or electric push rods for controlling the turning of the lamp bracket 3 and the astigmatic transparent plate 34 are respectively connected to the control circuit board and control switch arranged on the lamp post 1 through control lines or electric wires. The control circuit board and the control switch are respectively connected to the remote-controlled computer terminal. Instructions are sent through the computer terminal to drive the control switch to turn on the motor or electric push rod, or to turn on the low-brightness lamp board 33, the medium-brightness lamp board 32 and the high-brightness lamp board 31 through the control switch, so as to facilitate the control of the lamp at any time.

[0029] The control of the STM32 microcontroller or the control using the control circuit board and the computer terminal are all well-known technical means to those skilled in the art and will not be elaborated here.

[0030] The astigmatic transparent plate 34 is a frosted plastic plate.

[0031] The low-brightness lamp board 33, the medium-brightness lamp board 32 and the high-brightness lamp board 31 are LED lamp boards.

[0032] In the above technical solution, the two lamp brackets 3 are flipped into a "V" shape to expand the illumination area of the low-brightness lamp panel 33, the medium-brightness lamp panel 32, and the high-brightness lamp panel 31, and then the two lamp brackets 3 are flipped again to form a "∧" shape and the high-brightness lamp panel 31 is turned off. At this time, the brightness of the street lamp is reduced, and at the same time, the illumination areas of the low-brightness lamp panel 33 and the medium-brightness lamp panel 32 are narrowed. Then, the light-diffusing transparent plate 34 is rotated to be located below the lamp bracket 3 in the "∧" shape, so as to further weaken the brightness around the light illumination area and reduce the impact on the rest of the surrounding residents.

[0033] As a further embodiment provided by the present invention, there are two light-diffusing transparent plates 34, which are respectively fixedly installed on the lamp bracket 3, and the end distances of the two light-diffusing transparent plates 34 are adjustable when switching between the two distribution states of "V" shape and "∧" shape.

[0034] Specifically, a storage cavity 12 is opened at the bottom of the lamp cover 11, and the two lamp brackets 3 are respectively hinged on the inner wall of the storage cavity 12, and the two light-diffusing transparent plates 34 are respectively fixedly installed at the opposite ends of the two lamp brackets 3. The lamp bracket 3 is an aluminum alloy bracket, and the light-diffusing transparent plate 34 is fixedly installed on the lamp bracket 3 by screws.

[0035] Furthermore, when the two lamp brackets 3 are driven to flip into a "V" shape, at this time, the two light-diffusing transparent plates 34 are respectively attached to the lamp cover 11, and the end distances of the two light-diffusing transparent plates 34 are the largest, thus avoiding blocking the low-brightness lamp panel 33, the medium-brightness lamp panel 32, and the high-brightness lamp panel 31 and affecting their illumination. When the two lamp brackets 3 are driven to flip again to form a "∧" shape, at this time, the lamp brackets 3 are received in the storage cavity 12, so as to narrow the illumination ranges of the low-brightness lamp panel 33, the medium-brightness lamp panel 32, and the high-brightness lamp panel 31. At the same time, the two light-diffusing transparent plates 34 respectively flip and swing downward synchronously. After the two light-diffusing transparent plates 34 stop swinging downward, the end distances of the two light-diffusing transparent plates 34 are the smallest at this time. At the same time, as Figure 13 shown, by using the two light-diffusing transparent plates 34, it is possible to block the light irradiated outward by the low-brightness lamp panel 33 and the medium-brightness lamp panel 32, and perform light diffusion and weakening on the light, so as to further reduce the impact of light pollution on the surrounding residential users.

[0036] As another embodiment provided by the present invention, a hanging plate 37 is fixedly installed on the outer wall of the hinge shaft 36 provided on the lamp bracket 3, and a lamp cover 11 is arranged to cover the lamp bracket 3. A pulling member 39 for deflecting the hinge shaft 36 is fixedly connected between the main electric push rod 4 fixedly installed in the lamp cover 11 and the two hanging plates 37.

[0037] Specifically, the pulling member 39 is a nylon rope or a steel wire rope. The hanging plate 37 is fixedly welded to the hinge shaft 36. The main electric push rod 4 is fixedly installed on the lamp shade 11 through bolts and nuts. Extension platforms 13 are symmetrically arranged on both sides of the opening of the storage cavity 12 at the bottom of the lamp shade 11. A functional cavity 18 is formed in the extension platform 13. The hanging plate 37 is located in the functional cavity 18. A first torsion spring member 38 is sleeved on the outer wall of the hinge shaft 36, and both ends of the first torsion spring member 38 are fixedly installed on the inner wall of the functional cavity 18 and the hanging plate 37 respectively. Both ends of the first torsion spring member 38 are respectively hooked on the inner wall of the functional cavity 18 and the hanging rings arranged on the hanging plate 37. A first guiding shaft 41 and a second guiding shaft 42 are symmetrically and rotatably arranged in the functional cavity 18, and a phase-changing shaft 43 is rotatably arranged in the functional cavity 18. The pulling members 39 on the two hanging plates 37 are respectively movably arranged on the two first guiding shafts 41 and the two second guiding shafts 42, and then are simultaneously attached to the phase-changing shaft 43. When the main electric push rod 4 pushes the two pulling members 39 to swing the two hanging plates 37 respectively, at this time, the two hinge shafts 36 respectively deflect and switch the two lamp brackets 3 from the "∧" shape to the "V" shape, and the first torsion spring member 38 deforms and stores energy.

[0038] Further, when the main electric push rod 4 retracts and returns to its original position, at this time, the first torsion spring member 38 releases the stored energy to drive the lamp bracket 3 to reset, and switches the lamp bracket 3 from the "V" shape to the "∧" shape. Furthermore, by the telescoping of the main electric push rod 4, the two lamp brackets 3 are simultaneously driven to switch between the "V" shape and the "∧" shape, so as to quickly and synchronously adjust the angles of the lamp brackets 3 and the lighting angles.

[0039] As another embodiment provided by the present invention, the pulling member 39 is fixedly installed on a positioning block 44 arranged at the output end of the main electric push rod 4, and a clamping plate 5 hinged in the lamp shade 11 is movably arranged in a row of teeth 47 arranged on the positioning block 44.

[0040] Specifically, the positioning block 44 is fixedly installed at the output end of the main electric push rod 4 by bolts and nuts. A second torsion spring member 52 is sleeved on the hinge rod of the clamping plate 5, and both ends of the second torsion spring member 52 are fixedly installed on the inner wall of the functional cavity 18 and the clamping plate 5 respectively. Both ends of the second torsion spring member 52 are respectively hooked on the inner wall of the functional cavity 18 and the hanging rings arranged on the clamping plate 5. The second torsion spring member 52 drives the end of the clamping plate 5 to fit on the row of teeth 47. As Figure 11As shown, when the main electric push rod 4 pushes the positioning block 44 to move, the positioning block 44 pulls the two pulling members 39, and the pulling members 39 pull the two hanging plates 37 to swing respectively. When the positioning block 44 moves, the card plate 5 switches between the teeth of the row of teeth 47. When the main electric push rod 4 pushes the positioning block 44 and the two lamp holders 3 switch from the "∧" shape to the "V" shape, the first torsion spring member 38 is deformed and stored. At the same time, the card plate 5 is located on the side of the last tooth of the row of teeth 47. At this time, after the power supply to the main electric push rod 4 is stopped, although the first torsion spring member 38 releases the stored force, the card plate 5 pushes down the last tooth of the row of teeth 47 to avoid the positioning block 44 from resetting, and the two lamp holders 3 can maintain the "V" shape. At the same time, stopping the power supply to the main electric push rod 4 can reduce the power consumption and the loss caused by the long-term power supply of the main electric push rod 4. Thereby saving energy and improving the service life of the main electric push rod 4.

[0041] As another embodiment provided by the present invention, a lever 53 movably connected to the clamping plate 5 is slidably arranged in the sliding cavity 56 opened on the lampshade 11, and a single ventilation valve 57 and fine pores 58 respectively connected to the sliding cavity 56 are arranged on the lampshade 11. After the positioning block 44 pushes the lever 53 to reset, the single ventilation valve 57 is closed, and the clamping plate 5 is disengaged from the row of teeth 47.

[0042] Specifically, the card plate 5 is provided with a waist groove 51, and the protruding rod 54 provided on the lever 53 is movable in the waist groove 51, and the lever 53 is fixedly provided with an extension rod 55, and the extension rod 55 and the lever 53 are integrally formed. A slide plate 45 is slidably provided on the positioning block 44, and a pulling spring 46 is fixedly provided between the positioning block 44 and the slide plate 45, and the fine pores 58 are connected to the functional cavity 18.

[0043] When the main electric push rod 4 pushes the positioning block 44 to move so that the two lamp holders 3 switch from the "∧" shape to the "V" shape, the card plate 5 pushes the last tooth of the row of teeth 47 to prevent the positioning block 44 from resetting after the main electric push rod 4 stops supplying power. In this state, in order to enable the positioning block 44 to reset when needed, the main electric push rod 4 is powered and continues to push the positioning block 44 to move. At this time, because the pulling member 39 can no longer be pulled, the pulling spring 46 is deformed and stored with the movement of the positioning block 44, and the positioning block 44 pushes the extension rod 55, and then the extension rod 55 drives the lever 53 to compress the slide cavity 56. At this time, the single vent valve 57 is opened to allow the gas in the slide cavity 56 to be discharged from the slide cavity 56 along the single vent valve 57 and the fine pores 58. At the same time, the lever 53 slides to allow the convex rod 54 to slide in the waist groove 51 and toggle the card plate 5 to flip and disengage from the row of teeth 47, and the second torsion spring member 52 is deformed and stored.

[0044] Then, by driving the main electric push rod 4 to retract and reset again, the single-vent valve 57 is closed at this time. As the second torsion spring member 52 and the pulling spring 46 release the stored energy, the air in the functional cavity 18 can only slowly enter the sliding cavity 56 through the fine pores 58, so that the clamping plate 5 is slowly reset. During the slow reset process of the clamping plate 5, the retraction and reset of the main electric push rod 4 can prevent the clamping plate 5 from blocking the reset of the positioning block 44. At the same time, by using the telescopic cooperation of the main electric push rod 4 with the clamping plate 5 to push and lock the positioning block 44 and slowly release the unlocking, the driving, quick locking and unlockable operations of the positioning block 44 are realized, so that the states of the two lamp brackets 3 can still be maintained when the power supply to the main electric push rod 4 is stopped.

[0045] As the optimal embodiment provided by the present invention, air inlet openings 17 located on one side of the lamp bracket 3 are respectively formed on the outer walls of opposite sides of the lamp shade 11. Elastic plates 73 which are symmetrically and fixedly installed in the lamp shade 11 and inclined towards the inside of the lamp shade 11 to block the air inlet openings 17 are provided, and narrow air openings 74 are formed on the side of the elastic plates 73 close to the lamp bracket 3.

[0046] Specifically, the elastic plates 73 are fixedly installed on the inner wall of the storage cavity 12 by screws. The air inlet openings 17 are respectively communicated with the storage cavity 12, and the two lamp brackets 3 are respectively located on one side of the air inlet openings 17 in the storage cavity 12.

[0047] As Figure 12 shown, when the two lamp brackets 3 are in a "V" shape, at this time, under the enclosure of the elastic plates 73, the inner wall of the storage cavity 12 and the lamp brackets 3, the channel from the air inlet opening 17 to the narrow air opening 74 is gradually narrowed. According to the venturi effect, when air flow or liquid flows through a narrow terrain, the flow rate increases due to the narrowing of the channel. When external air enters the air inlet opening 17, at this time, due to the gradual narrowing of the channel, the wind speed passing through the narrow air opening 74 is increased. Since the narrow air opening 74 is close to the high-brightness lamp board 31 on the lamp bracket 3, it is convenient to use the air flow flowing through the narrow air opening 74 to dissipate heat from the high-brightness lamp board 31 with a higher heat generation amount, thereby prolonging the service life of the high-brightness lamp board 31.

[0048] As another embodiment provided by the present invention, a heat dissipation plate composed of a short plate 71 and a long plate 7 which are symmetrically hinged is included. When the two lamp brackets 3 are in a "V" shape, the short plate 71 is attached to the high-brightness lamp board 31, and when the two lamp brackets 3 are in a "^" shape, the lamp brackets 3 push the heat dissipation plate to make the long plate 7 attached to the low-brightness lamp board 33 and the medium-brightness lamp board 32.

[0049] Specifically, when the two lamp brackets 3 are in a "V" shape, the short plate 71 on the heat dissipation plate fits onto the high-brightness lamp panel 31, so that the heat on the high-brightness lamp panel 31 is transferred to the short plate 71 and gradually transferred to the long plate 7. At this time, the heat dissipation plate is used to facilitate the heat dissipation of the high-brightness lamp panel 31, thereby improving the heat dissipation effect of the high-brightness lamp panel 31. When the two lamp brackets 3 are switched from a "V" shape to a "∧" shape, because the lamp brackets 3 swing upward to push the heat dissipation plate to also swing upward. When the two lamp brackets 3 are in a "∧" shape, at this time, the long plates 7 on the heat dissipation plate respectively fit onto the low-brightness lamp panel 33 and the medium-brightness lamp panel 32, and the short plate 71 is separated from the high-brightness lamp panel 31 due to the upward swing of the heat dissipation plate. At this time, when the two lamp brackets 3 are in a "∧" shape, the high-brightness lamp panel 31 goes out, while the low-brightness lamp panel 33 and the medium-brightness lamp panel 32 are still lighting and generating heat. Then, the heat of the low-brightness lamp panel 33 and the medium-brightness lamp panel 32 can be transferred to the long plate 7 and gradually transferred to the short plate 71. At this time, the heat dissipation plate is used again to dissipate heat from the low-brightness lamp panel 33 and the medium-brightness lamp panel 32. The heat dissipation plate can be switched to fit and dissipate heat between the high-brightness lamp panel 31, the low-brightness lamp panel 33 and the medium-brightness lamp panel 32 according to the state change of the two lamp brackets 3, so as to effectively use the heat dissipation plate for heat dissipation, improve the service life of the high-brightness lamp panel 31, the low-brightness lamp panel 33 and the medium-brightness lamp panel 32. Compared with a whole heat dissipation component acting on the high-brightness lamp panel 31, the low-brightness lamp panel 33 and the medium-brightness lamp panel 32 at the same time, when the high-brightness lamp panel 31 is in use, the heat dissipation plate only dissipates heat from the high-brightness lamp panel 31, which can avoid the influence of the heat of the low-brightness lamp panel 33 and the medium-brightness lamp panel 32 on the heat dissipation of the high-brightness lamp panel 31, so as to improve the heat dissipation effect. When the high-brightness lamp panel 31 does not need heat dissipation, it is switched to the low-brightness lamp panel 33 and the medium-brightness lamp panel 32 to make full use of the heat dissipation of the heat dissipation plate, so as to achieve a better heat dissipation effect, and there is no need for expensive heat dissipation components such as too complex heat dissipation fins.

[0050] As another embodiment provided by the present invention, the elastic plate 73 is movable on the heat dissipation plate, and when the two lamp brackets 3 are in a "∧" shape, the air guide port 72 opened on the short plate 71 communicates with the air injection port 17.

[0051] Specifically, as Figure 14 shown, when the two lamp brackets 3 are in a "V" shape, the end of the elastic plate 73 fits onto the short plate 71. Then, by using the elasticity of the elastic plate 73 to press against the short plate 71, the short plate 71 can be more closely attached to the high-brightness lamp panel 31 for heat dissipation. At the same time, because the end of the elastic plate 73 fits onto the short plate 71, at this time, the narrow air port 74 faces the short plate 71. Then, when there is air flow in the air injection port 17, air is blown to the short plate 71 through the narrow air port 74 to dissipate heat from the short plate 71. At the same time, as Figure 12 and Figure 14As shown, a heat exhaust port 14 communicating with the storage cavity 12 is provided at the top of the lamp shade 11. When the short board 71 is attached to the high-brightness lamp board 31, the long board 7 maintains an obliquely downward inclined state. Then, after the narrow air outlet 74 blows air to dissipate heat from the short board 71, the air flow can flow under the guidance of the inclined state of the long board 7, and thus the long board 7 is also blown to dissipate heat by the blowing air. Moreover, under the guidance of the long board 7, the blowing air can be better guided to the heat exhaust port 14 for rapid discharge, accelerating the air flow in the storage cavity 12 and improving the overall heat dissipation effect of the heat dissipation plate.

[0052] Then, when the two lamp holders 3 are switched from the "V" shape to the "∧" shape, the high-brightness lamp board 31 goes out. At the same time, the lamp holders 3 swing upward to push the heat dissipation plate and make the long board 7 on the heat dissipation plate attach to the low-brightness lamp board 33 and the medium-brightness lamp board 32. At this time, as Figure 15 shown, the elastic plate 73 is pushed and deformed, and maintains a state of pressing down on the short board 71, so that the long board 7 is more closely attached to the low-brightness lamp board 33 and the medium-brightness lamp board 32. Moreover, the narrow air outlet 74 is blocked, and the air guiding port 72 is exposed. Then, through the exposed air guiding port 72, the air flow along the filling air inlet 17 can directly dissipate heat from the surface of the long board 7 when passing through the air guiding port 72, thus realizing more effective heat dissipation for the long board 7. By switching between the narrow air outlet 74 and the air guiding port 72, the blowing heat dissipation at different positions of the short board 71 and the long board 7 is realized, so as to directly and better dissipate heat from the long board 7 or the short board 7 at the contact position of the heat dissipation plate contacting the low-brightness lamp board 33, the medium-brightness lamp board 32 and the high-brightness lamp board 31.

[0053] As another embodiment further provided by the present invention, it includes a mounting block 15, and reflective walls 19 are symmetrically arranged on the outer walls of opposite sides of the mounting block 15. Elastic reflective plates 6 symmetrically and movably arranged in the mounting block 15 extend out of the bottom of the mounting block 15 when the two lamp holders 3 are in the "∧" shape.

[0054] Specifically, the top end of the elastic reflective plate 6 is fixedly installed on the mounting block 15 by screws, and the elastic reflective plate 6 is movably arranged in a guiding groove 16 opened on the mounting block 15. A cleaning cotton pad 2 fixedly installed on the mounting block 15 by glue is attached to the reflective surface of the elastic reflective plate 6.

[0055] Fitting sponge pads 35 are respectively fixedly installed at the adjacent ends of the two lamp holders 3, and the fitting sponge pads 35 are fixedly installed on the lamp holders 3 by glue. And the fitting sponge pads 35 are movable on the reflective walls 19, and a reflective coating for reflection, such as a reflective metal coating, is sprayed on the reflective walls 19. The elastic reflective plate 6 is a smooth-surface elastic stainless steel plate. The cleaning cotton pad 2 can clean the reflective surface of the moving elastic reflective plate 6, and the fitting sponge pads 35 can scrape and clean the reflective walls 19 as the lamp holders 3 move.

[0056] Further, when the two lamp brackets 3 are in a "V" shape, the fitting sponge pads 35 on the two lamp brackets 3 are respectively fitted on the reflective wall 19. At this time, the mounting block 15, the two lamp brackets 3, and the low-brightness lamp board 33, medium-brightness lamp board 32, and high-brightness lamp board 31 thereon relatively block and close the bottom opening of the storage cavity 12. When the low-brightness lamp board 33, medium-brightness lamp board 32, and high-brightness lamp board 31 emit light and dissipate heat, the hot air flow in the storage cavity 12 will flow upward and be discharged along the heat exhaust port 14. When the hot air flow in the storage cavity 12 is discharged, the external air enters the storage cavity 12 through the air inlet 17 and the narrow air outlet 74. When the external air enters the storage cavity 12, the air flow flowing out of the narrow air outlet 74 will dissipate heat from the short board 71, thereby improving the heat dissipation effect on the short board 71.

[0057] Then, when the two lamp brackets 3 are switched from the "V" shape to the "∧" shape, the two light-diffusing transparent plates 34 are synchronously flipped and swung downward to block the light irradiated by the low-brightness lamp board 33 and the medium-brightness lamp board 32 to the outside. At the same time, the bottom end of the elastic reflective plate 6 extends out of the bottom of the mounting block 15, and the reflective surface of the elastic reflective plate 6 and the reflective wall 19 face the low-brightness lamp board 33 and the medium-brightness lamp board 32 respectively. At this time, the light irradiated by the low-brightness lamp board 33 and the medium-brightness lamp board 32 is refracted by the reflective surface of the elastic reflective plate 6 and the reflective wall 19, as Figure 16 shown by the arrows and the dotted lines representing the light rays and refracted light rays in. By using the refracted light rays, which are lower in brightness compared to the light source and will increase the illumination area of the street lamp, and being blocked by the light-diffusing transparent plate 34 and the refracted light rays slanting downward, the influence of the refracted light rays on the residents is minimized as much as possible and the scattering area is expanded, so as to provide a scattered weak light for the surrounding environment at night, so as to provide a relatively basic and certain visible light brightness for the pedestrians on the walking road. Thus, without the need to adjust the power of the low-brightness lamp board 33 and the medium-brightness lamp board 32 or use an LED lamp body with PWM pulse width modulation, the dimming of the street lamp illumination at night and better applicability are achieved to ensure that there is a certain basic light radiation on the road surface and reduce the influence of the light on the sleep of the surrounding residents.

[0058] As the optimal embodiment further provided by the present invention, when the two lamp brackets 3 are switched from the "V" shape to the "∧" shape, their ends respectively push against the convex portions 61 provided on the elastic reflective plate 6, and the convex portions 61 are deformed to drive the bottom end of the elastic reflective plate 6 to extend out of the bottom of the mounting block 15.

[0059] Specifically, the elastic light reflector 6 is located on the swinging path of the lamp holder 3. When the two lamp holders 3 are switched from the "V" shape to the "∧" shape, the adjacent end parts of the two lamp holders 3 respectively squeeze the convex part 61 at this time. Since the top end of the elastic light reflector 6 is fixedly installed on the mounting block 15, the squeezed and deformed convex part 61 will drive the bottom end of the elastic light reflector 6 to extend out of the bottom of the mounting block 15. Thus, when the lamp holder 3 is in the "∧" shape, the low-brightness lamp panel 33 and the medium-brightness lamp panel 32 on it can irradiate and refract the reflecting surface of the elastic light reflector 6 extending out of the bottom of the mounting block 15.

[0060] Furthermore, when the two lamp holders 3 are switched from the "∧" shape to the "V" shape, the convex part 61 resumes deformation at this time to drive the elastic light reflector 6 to retract into the mounting block 15 again. Furthermore, the swinging of the two lamp holders 3 is utilized to control the deformation of the elastic light reflector 6, so as to facilitate the exposure and reflection of the elastic light reflector 6 when needed, and to reduce the deposition of dust on its reflecting surface to affect the refraction effect when not needed.

[0061] Working principle: When the time is from six o'clock to ten o'clock at night, the low-brightness lamp panel 33, the medium-brightness lamp panel 32 and the high-brightness lamp panel 31 are powered on to emit light. Then, the main electric push rod 4 is used to push the positioning block 44 to move to cooperate with the two pulling members 39 to pull the hanging plate 37, and drive the two lamp holders 3 to flip. At this time, the two lamp holders 3 are switched from the "∧" shape to the "V" shape to expand the irradiation surface of the low-brightness lamp panel 33, the medium-brightness lamp panel 32 and the high-brightness lamp panel 31. At the same time, the short board 71 fits on the high-brightness lamp panel 31 to dissipate heat for it. And the clamping plate 5 pushes the last tooth of the row of teeth 47 to prevent the positioning block 44 from resetting after the main electric push rod 4 stops power supply.

[0062] When the time reaches ten o'clock sharp, the high-brightness lamp panel 31 is extinguished by power-off, and the main electric push rod 4 is powered on again and continues to push the positioning block 44 to move. The positioning block 44 pushes the extension rod 55 and makes the lever 53 compress the sliding cavity 56. Then, the main electric push rod 4 retracts and resets. At this time, the single-vent valve 57 is closed, and the air in the functional cavity 18 can only slowly enter the sliding cavity 56 through the fine pores 58, so that the clamping plate 5 is slowly reset. At this time, the retraction and reset of the main electric push rod 4 can prevent the clamping plate 5 from blocking the reset of the positioning block 44. When the two lamp holders 3 are switched from the "V" shape to the "∧" shape, the lamp holders 3 swing upward to push the heat dissipation plate and make the long plate 7 on the heat dissipation plate fit on the low-brightness lamp panel 33 and the medium-brightness lamp panel 32 to dissipate heat for them. At the same time, the lamp holders 3 squeeze the convex part 61 to deform, and make the bottom end of the elastic light reflector 6 extend out of the bottom of the mounting block 15. At this time, the low-brightness lamp panel 33 and the medium-brightness lamp panel 32 can irradiate and refract the reflecting surface of the elastic light reflector 6 extending out of the bottom of the mounting block 15, and the two light-diffusing transparent plates 34 respectively flip and swing downward synchronously to approach for light shielding, thereby narrowing the irradiation range of the light and minimizing the impact of the light on the residents as much as possible to improve the overall applicability of the light.

[0063] Only some exemplary embodiments of the present invention have been described above by way of illustration. Without doubt, for those of ordinary skill in the art, various different ways can be used to modify the described embodiments without departing from the spirit and scope of the present invention. Therefore, the above drawings and description are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A kind of energy-saving dimming LED street lamp, characterized in that, It includes symmetrically hinged lamp brackets (3), and low-brightness lamp panels (33), medium-brightness lamp panels (32), and high-brightness lamp panels (31) are successively installed on the two lamp brackets (3) and distributed from the adjacent side to the other side; The two lamp brackets (3) are driven to flip to switch between two distribution states of "V" shape and "∧" shape, and when switched to the "∧" shape, the high-brightness lamp panel (31) is turned off; It further includes a rotatably arranged light-diffusing transparent plate (34), and when switched to the "∧" shape, it is located below the lamp bracket (3).

2. The energy-saving dimming LED street lamp according to claim 1, characterized in that, There are two of the light-diffusing transparent plates (34) which are respectively fixedly installed on the lamp brackets (3), and the end distance between the two light-diffusing transparent plates (34) is adjustable when switching between the two distribution states of "V" shape and "∧" shape.

3. An energy-saving dimming LED street lamp according to claim 1, characterized in that, A hanging plate (37) is fixedly installed on the outer wall of the hinge shaft (36) arranged on the lamp bracket (3), and a lamp cover (11) is arranged to cover the lamp bracket (3). A pulling member (39) for deflecting the hinge shaft (36) is fixedly connected between the main electric push rod (4) fixedly installed in the lamp cover (11) and the two hanging plates (37).

4. An energy-saving dimming LED street lamp according to claim 3, characterized in that, The pulling member (39) is fixedly installed on the positioning block (44) arranged at the output end of the main electric push rod (4), and a clamping plate (5) hinged in the lamp cover (11) is movably arranged in the row of teeth (47) arranged on the positioning block (44).

5. An energy-saving dimming LED street lamp according to claim 4, characterized in that, A dial rod (53) movably connected to the clamping plate (5) is slidably arranged in the sliding cavity (56) opened on the lamp cover (11), and a single air valve (57) and fine pores (58) respectively communicated with the sliding cavity (56) are arranged on the lamp cover (11). After the positioning block (44) pushes the dial rod (53) to reset, the single air valve (57) closes, and the clamping plate (5) disengages from the row of teeth (47).

6. The energy-saving dimming LED street lamp according to claim 3, wherein, Ventilation openings (17) located on one side of the lamp bracket (3) are respectively opened on the outer walls of the opposite sides of the lamp cover (11). Elastic plates (73) which are inclined towards the inside of the lamp cover (11) and used to block the ventilation openings (17) are symmetrically and fixedly installed in the lamp cover (11), and narrow air openings (74) are opened on the side of the elastic plates (73) close to the lamp bracket (3).

7. An energy-saving dimming LED street lamp according to claim 1, characterized in that It includes a heat dissipation plate composed of a short plate (71) and a long plate (7) which are symmetrically hinged. When the two lamp brackets (3) are in the "V" shape, the short plate (71) fits on the high-brightness lamp panel (31), and when the two lamp brackets (3) are in the "∧" shape, the lamp brackets (3) push the heat dissipation plate so that the long plate (7) fits on the low-brightness lamp panel (33) and the medium-brightness lamp panel (32).

8. An energy-saving dimming LED street lamp according to claim 6, characterized in that, The elastic plate (73) is movable on the heat dissipation plate, and when the two lamp brackets (3) are in the "∧" shape, the air guide openings (72) opened on the short plate (71) are communicated with the ventilation openings (17).

9. An energy-saving dimming LED street lamp according to claim 1, characterized in that, It includes a mounting block (15), and reflective walls (19) are symmetrically arranged on the outer walls of the opposite sides of the mounting block (15). Elastic reflective plates (6) symmetrically and movably arranged in the mounting block (15) extend out of the bottom of the mounting block (15) when the two lamp brackets (3) are in the "∧" shape.

10. An energy-saving dimming LED street lamp according to claim 1, characterized in that, When the two lamp holders (3) are switched from a "V" shape to a "∧" shape, their end parts respectively push against the convex parts (61) provided on the elastic light reflecting plate (6), and the convex parts (61) are deformed to drive the bottom end of the elastic light reflecting plate (6) to extend out of the bottom of the mounting block (15).

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