High-efficiency heat dissipation mining lamp

Abstract

The mining lamp comprises a mounting disc, and a mounting stand column is arranged on the upper side of the mounting disc; the power supply is connected to the upper end of the mounting stand column; the lens is connected to the lower side of the mounting disc; the light source substrate is arranged between the mounting disc and the lens; one end of each heat dissipation fin is connected to the upper side of the mounting disc, the other end of each heat dissipation fin extends out of the peripheral side of the mounting disc, the multiple heat dissipation fins are circumferentially distributed around the power source, and a heat guiding channel is formed between every two adjacent heat dissipation fins; and the flow gathering ring is arranged at the ends, away from the mounting disc, of the cooling fins in a sleeving mode, and air passing channels are formed between the flow gathering ring and the cooling fins. The mining lamp has the effect that the mining lamp can dissipate heat more efficiently.

Description

Technical Field

[0001] The present application relates to the field of lighting equipment, and in particular to an industrial and mining lamp with high-efficiency heat dissipation. Background Art

[0002] Industrial and mining lamps, also known as high-bay lamps, are a type of energy-efficient indoor LED lamps that can be widely used in industrial plants, production workshops, supermarkets, sports and entertainment venues, warehouses, etc.

[0003] In the related art, such as publication number CN217635306U, an ultra-thin mining lamp includes a heat dissipation lamp shell, an LED light source board installed in the heat dissipation lamp shell, and a light-emitting cover plate connected to the light-emitting end surface of the heat dissipation lamp shell. The LED light source board includes a substrate with a driving power supply and a plurality of LED lamp beads arranged on the substrate. The heat dissipation lamp shell does not need to be separately provided with a mounting base for installing the driving circuit, thereby reducing the vertical height of the heat dissipation lamp shell, and further reducing the volume and thickness of the mining lamp. In this structural form, the heat of the driving power supply and the LED lamp beads will gather together, thereby causing the temperature of the mining lamp to be too high.

[0004] For example, in publication number CN118935293A, the mining lamp includes a lamp housing body, a light source board, a light transmission mechanism and a power supply. The light source board is located between the lamp housing body and the light transmission mechanism, and the power supply is installed on the side away from the lamp housing body. In this structural form, although the power supply is not integrated on the light source board, the heat of the power supply will also be transferred to the lamp beads, so the heat dissipation capacity of the mining lamp is poor, which will also cause the temperature of the mining lamp to be relatively high. Summary of the invention

[0005] In order to enable the industrial and mining lamp to dissipate heat more efficiently, the present application provides an industrial and mining lamp with efficient heat dissipation.

[0006] The present application provides an efficient heat dissipation industrial and mining lamp adopts the following technical solution: An industrial and mining lamp with high efficiency heat dissipation, comprising: A mounting plate, with mounting columns arranged on the upper side; A power source connected to the upper end of the mounting column; A lens connected to the lower side of the mounting plate; A light source substrate, arranged between the mounting plate and the lens; A heat dissipation fin, one end of which is connected to the upper side of the mounting plate, and the other end of which extends to the outside of the peripheral side of the mounting plate, wherein a plurality of the heat dissipation fins are distributed in a circle around the power supply, and a heat introduction channel is formed between two adjacent heat dissipation fins; A focusing ring is sleeved on one end of the plurality of heat dissipation fins away from the mounting plate, and an air passage is formed between the focusing ring and the heat dissipation fins.

[0007] By adopting the above technical solution, there is a distance between the power supply and the light source substrate. When the airflow passes through the air passage, under the action of the Venturi effect, the heat in the area between the power supply and the mounting plate enters the heat introduction channel and is then carried away by the airflow in the air passage. Similarly, the airflow in the air passage will also carry away the heat generated by the light source substrate. In this design method, firstly, from the perspective of the heat diffusion path, the heat of the power supply diffuses to the surroundings, and the heat of the light source substrate also diffuses to the surroundings, but the diffusion positions are not at the same height, so the heat dissipation can be promoted from the spatial distribution method; secondly, the current direction between the power supply and the light source substrate is from top to bottom, so that the thermal path of the industrial and mining lamp does not overlap with the electrical path, thus forming a thermoelectric separation, which can not only dissipate heat efficiently, but also will not affect the stability of the electrical path, so it helps to keep the industrial and mining lamp at a low temperature during long-term operation. In summary, the combination of spatial distribution and thermoelectric separation can achieve efficient heat dissipation of the industrial and mining lamp.

[0008] Preferably, the heat dissipation fins are perpendicular to the mounting plate, and the inner diameter of the upper side of the focusing ring is smaller than the inner diameter of the lower side.

[0009] By adopting the above technical solution, the flow area at the lower end of the air passage will be larger, and the flow area at the upper end of the air passage will be smaller. Therefore, when sufficient air passes through the air passage, the flow rate of the air in the air passage can be accelerated, thereby promoting heat dissipation.

[0010] Preferably, the focusing ring is provided with inner and outer convection holes near a side of the focusing ring having a smaller inner diameter, and the inner and outer convection holes are connected to the gas passage.

[0011] By adopting the above technical solution, the airflow leaving the air passage can be accelerated, and the gas in the air passage can also exchange heat with the external gas, thereby promoting heat dissipation.

[0012] Preferably, a portion of the heat dissipating fin close to the focusing ring is longer in the vertical direction than a portion close to the mounting plate.

[0013] By adopting the above technical solution, the heat can still remain in the heat-introducing channel during the process of heat diffusion to the surroundings, so the Venturi effect generated by the air passage can effectively accelerate the diffusion of heat, thereby maintaining efficient heat dissipation.

[0014] Preferably, a drainage mesh plate is provided at one end of the air passage close to the focusing ring with a smaller inner diameter, and the drainage mesh plate is used to guide the airflow toward the direction where the heat introduction channel is located.

[0015] By adopting the above technical solution, the airflow can be closer to the location of the power supply after leaving the air passage, so the heat generated by the power supply can be taken away more quickly. At the same time, the drainage mesh plate has holes, so it cannot hinder the smooth movement of gas in the air passage, thereby promoting the heat dissipation of the industrial and mining lamp.

[0016] Preferably, the length of the mounting column is greater than the length of the heat dissipation fin in the vertical direction.

[0017] By adopting the above technical solution, the path for the heat of the power supply to enter the heat introduction channel can be expanded, so that more heat can be guided into the heat introduction channel, thereby more fully realizing thermal and electrical separation, which in turn helps to promote the heat dissipation of the industrial and mining lamp.

[0018] Preferably, a heat-conducting rod is provided on the upper side of the mounting plate, and one of the heat-conducting rods is located between two adjacent heat dissipation fins, with one end of the heat-conducting rod close to the center of the mounting plate and the other end extending into the heat-conducting channel; a heat-conducting adhesive strip is bonded to the light source substrate, and the heat-conducting adhesive strip extends along the diameter of the light source substrate.

[0019] By adopting the above technical solution, since solid has stronger thermal conductivity, the setting of the heat-conducting rod can allow the heat of the power supply to diffuse into the air passage more quickly, so it can promote heat dissipation. At the same time, the setting of the thermal conductive strip can promote the heat dissipation of the light source substrate on the basis of keeping the industrial and mining lamp thinner.

[0020] Preferably, the plurality of heat-conducting rods are divided into two groups, wherein one end of the heat-conducting rods away from the heat-conducting channel is located between the power supply and the mounting plate, and the other end of the heat-conducting rods away from the heat-conducting channel penetrates into the power supply.

[0021] By adopting the above technical solution, it is possible to guide the heat that has been diffused to the outside of the power supply and the heat inside the power supply, so that the heat of the power supply can be better prevented from being transferred to the light source substrate, and the thermal-electric separation can be strengthened, thereby promoting the heat dissipation of the industrial and mining lamps.

[0022] Preferably, the mounting plate includes a central fixed portion and a peripheral movable portion, the central fixed portion is provided for the mounting column, the peripheral movable portion is rotatably sleeved on the central fixed portion, the heat dissipation fins are provided on the peripheral movable portion, and a driven gear ring is provided on the upper side of the peripheral movable portion; a driving motor is provided on the peripheral side of the power supply, the output shaft of the driving motor is connected to a driving gear, and the driving gear is meshed with the driven gear ring; a fan blade single plate is provided at one end of the air passage close to the lower side of the focusing ring, which is used to form an airflow flowing into the air passage through a plurality of the fan blade single plates when the peripheral movable portion rotates.

[0023] By adopting the above technical solution, the peripheral active part can be rotated relative to the central fixed part through the cooperation of the driving motor, the active gear and the driven gear ring. In this process, multiple fan blades will form an effect similar to that of a fan, and the surrounding airflow will gather near the industrial and mining lamp, so active heat dissipation can be formed. At the same time, this airflow will not directly pass through the driving motor, thereby promoting the heat dissipation of the industrial and mining lamp without blocking the motor with dust.

[0024] In summary, the present application includes at least one of the following beneficial technical effects: There is a distance between the power supply and the light source substrate. When the airflow passes through the air passage, under the action of the Venturi effect, the heat in the area between the power supply and the mounting plate enters the heat introduction channel and is then taken away by the airflow in the air passage. Similarly, the airflow in the air passage will also take away the heat generated by the light source substrate. In this design, firstly, from the perspective of the heat diffusion path, the heat of the power supply diffuses to the surroundings, and the heat of the light source substrate also diffuses to the surroundings, but the diffusion positions are not at the same height, so the heat dissipation can be promoted from the spatial distribution method; secondly, the current direction between the power supply and the light source substrate is from top to bottom, so that the thermal path of the industrial and mining lamp does not overlap with the electrical path, thus forming a thermoelectric separation, which can not only dissipate heat efficiently, but also will not affect the stability of the electrical path, so it helps to keep the industrial and mining lamp at a low temperature during long-term operation. In summary, the combination of spatial distribution and thermoelectric separation can achieve efficient heat dissipation of the industrial and mining lamp; The peripheral active part can be rotated relative to the central fixed part through the cooperation of the driving motor, the active gear and the driven gear ring. In this process, multiple fan blades will form a fan-like effect, and the surrounding airflow will gather near the industrial and mining lamp, so active heat dissipation can be formed. At the same time, this airflow will not pass through the driving motor directly, so as to promote the heat dissipation of the industrial and mining lamp without blocking the motor with dust. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a schematic diagram of the structure of the industrial and mining lamp in Example 1 of the present application.

[0026] Figure 2 It is a schematic diagram made to illustrate the coordination structure between the heat-conducting rod and the power supply in Example 1 of the present application.

[0027] Figure 3 It is a schematic diagram of the structure of the industrial and mining lamp in Example 2 of the present application.

[0028] Figure 4 This is a schematic diagram of the installation posture of the fan blade single board in the air passage in Example 2 of the present application.

[0029] Explanation of the reference numerals in the accompanying drawings: 1. Mounting plate; 11. Mounting column; 12. Central fixed part; 13. Peripheral movable part; 2. Power supply; 3. Lens; 4. Light source substrate; 5. Heat dissipation fins; 51. Heat conduction channel; 6. Focusing ring; 61. Air passage; 62. Internal and external convection holes; 63. Drainage mesh plate; 7. Heat conduction rod; 8. Heat conduction rubber strip; 9. Driven gear ring; 91. Driving motor; 92. Driving gear; 93. Fan blade single plate. DETAILED DESCRIPTION

[0030] The following is combined with Figures 1 to 4 This application is described in further detail.

[0031] The embodiment of the present application discloses an industrial and mining lamp with high efficiency in heat dissipation. Example

[0032] Reference Figure 1 and Figure 2 The industrial and mining lamp includes a mounting plate 1, a power supply 2, a lens 3, a light source substrate 4, a heat dissipation fin 5 and a focusing ring 6. The mounting plate 1 is in a thin cylindrical shape, and a mounting column 11 is integrally formed on the upper side of the mounting plate 1; the power supply 2 is connected to the upper end of the mounting column 11; the lens 3 is connected to the lower side of the mounting plate 1; the light source substrate 4 is arranged between the mounting plate 1 and the lens 3; one end of the heat dissipation fin 5 is connected to the upper side of the mounting plate 1, and the other end extends to the outside of the peripheral side of the mounting plate 1, and multiple heat dissipation fins 5 are distributed in a circle around the power supply 2, and a heat introduction channel 51 is formed between two adjacent heat dissipation fins 5; the focusing ring 6 is sleeved on one end of the multiple heat dissipation fins 5 away from the mounting plate 1, and an air passage 61 is formed between the focusing ring 6 and the heat dissipation fin 5.

[0033] Reference Figure 1 and Figure 2 Because there is a distance between the power supply 2 and the light source substrate 4, when the airflow passes through the air passage 61, under the action of the Venturi effect, the heat in the area between the power supply 2 and the mounting plate 1 enters the heat introduction channel 51, and is then taken away by the airflow in the air passage 61. Similarly, the airflow in the air passage 61 will also take away the heat generated by the light source substrate 4. In this design, firstly, from the perspective of the heat diffusion path, the heat of the power supply 2 is diffused to the surroundings, and the heat of the light source substrate 4 is also diffused to the surroundings, but the diffusion positions are not at the same height, so the heat dissipation can be promoted from the spatial distribution method; secondly, the current direction between the power supply 2 and the light source substrate 4 is from top to bottom, so that the thermal path of the industrial and mining lamp does not overlap with the electrical path, thus forming a thermoelectric separation, which can not only dissipate heat efficiently, but also will not affect the stability of the electrical path, so it helps to keep the industrial and mining lamp at a low temperature during long-term operation. In summary, through the combination of spatial distribution and thermoelectric separation, efficient heat dissipation of the industrial and mining lamp is achieved.

[0034] Reference Figure 1 and Figure 2 In order to enhance the passive heat dissipation capacity of the mining lamp, it can be achieved by increasing the gas flow rate in the gas passage 61, and the following settings are correspondingly arranged. First, the heat dissipation fins 5 are perpendicular to the mounting plate 1, and the inner diameter of the upper side of the focusing ring 6 is smaller than the inner diameter of the lower side, which will make the flow area at the lower end of the gas passage 61 larger, and the flow area at the upper end of the gas passage 61 smaller. Therefore, when sufficient air passes through the gas passage 61, the flow rate of the airflow in the gas passage 61 can be accelerated; second, the focusing ring 6 is provided with inner and outer convection holes 62 near the side with a smaller inner diameter, and the inner and outer convection holes 62 are connected with the gas passage 61, which can accelerate the airflow to leave the gas passage 61 and allow the gas in the gas passage 61 to exchange heat with the external gas. In summary, the heat dissipation is enhanced by increasing the flow rate of the gas in the gas passage 61, thereby promoting the heat dissipation of the mining lamp.

[0035] Reference Figure 1 and Figure 2 , which can be achieved by accelerating the angle of heat diffusion of the power supply 2, and the corresponding settings are as follows: first, the length of the mounting column 11 is greater than the length of the heat dissipation fin 5 in the vertical direction, which can expand the path of the heat of the power supply 2 entering the heat introduction channel 51, so that more heat can be guided into the heat introduction channel 51; second, the part of the heat dissipation fin 5 close to the focusing ring 6 is longer in the vertical direction than the part close to the mounting plate 1, so in the process of heat diffusion to the surroundings, the heat generated by the light source substrate 4 will diffuse through the mounting plate 1, the heat dissipation fin 5 and other solid structures, and the heat generated by the power supply 2 will diffuse from the air, so the aforementioned heat is mainly dominated by the heat generated by the power supply 2, so during the diffusion process, the heat can still be in the heat introduction channel 51, so the Venturi effect generated by the air passage 61 can efficiently accelerate the diffusion of heat. In summary, the heat generated by the power supply 2 will enter the drainage channel more fully, and at the same time, more fully pass through the drainage channel to enter the air passage 61, thereby accelerating the diffusion of the heat of the power supply 2 by shortening the time for the heat to move to the air passage 61, thereby promoting the heat dissipation of the industrial and mining lamp.

[0036] Reference Figure 1 and Figure 2 In the method of accelerating the heat diffusion of the power supply 2, it can also be achieved by shortening the air path of the heat moving to the air passage 61, and the corresponding settings are as follows: first, a drainage mesh plate 63 is provided at the end of the air passage 61 close to the focusing ring 6 with a smaller inner diameter. The drainage mesh plate 63 is inclined, and the drainage mesh plate 63 is to guide the airflow in the direction of the heat introduction channel 51, which is equivalent to the outlet at the upper end of the air passage 61 being closer to the power supply 2, so that the airflow can be closer to the position of the power supply 2 after leaving the air passage 61, so that the heat generated by the power supply 2 can be taken away more quickly. In addition, the drainage mesh plate 63 has holes, so it cannot hinder the smoothness of the movement of the gas in the air passage 61.

[0037] Reference Figure 1 and Figure 2 Secondly, a heat-conducting rod 7 is arranged on the upper side of the mounting plate 1. The heat-conducting tube is made of copper. A heat-conducting rod 7 is located between two adjacent heat-dissipating fins 5. One end of the heat-conducting rod 7 is close to the center of the mounting plate 1, and the other end extends to the heat-introducing channel 51. By virtue of the stronger thermal conductivity of solids, the heat of the power supply 2 can be diffused to the air passage 61 more quickly, so the heat dissipation can be promoted. At the same time, this method is equivalent to reducing the air path for the movement of heat. In summary, the diffusion of the heat of the power supply 2 is accelerated by shortening the air path for the movement of heat, thereby promoting the heat dissipation of the mining lamp.

[0038] Reference Figure 1 and Figure 2 Without considering the convenience of installing and removing the power supply 2, the multiple heat-conducting rods 7 are divided into two groups. In one group, the end of the heat-conducting rods 7 away from the heat-conducting channel 51 is located between the power supply 2 and the mounting plate 1. This group of heat-conducting rods 7 mainly guides the heat of the power supply 2 that has diffused to the outside. In the other group, the end of the heat-conducting rods 7 away from the heat-conducting channel 51 penetrates into the power supply 2. This group of heat-conducting rods 7 will directly guide the heat of the power supply 2 from the inside, so the heat of the power supply 2 can also be diffused to the air passage 61 more quickly, so it can better prevent the heat of the power supply 2 from being transferred to the light source substrate 4, and can also strengthen the thermal-electric separation, thereby promoting the heat dissipation of the industrial and mining lamp.

[0039] In addition, in this embodiment, a thermal conductive adhesive strip 8 is attached to the light source substrate 4, and the thermal conductive adhesive strip 8 extends along the diameter of the light source substrate 4. This can promote the heat dissipation of the light source substrate 4 while keeping the mining lamp relatively thin, thereby also promoting the heat dissipation of the mining lamp.

[0040] The implementation principle of an efficient heat dissipation industrial and mining lamp in Example 1 of the present application is as follows: there is a distance between the power supply 2 and the light source substrate 4. When the airflow passes through the air passage 61, under the action of the Venturi effect, the heat in the area between the power supply 2 and the mounting plate 1 enters the heat introduction channel 51, and is then taken away by the airflow in the air passage 61. Similarly, the airflow in the air passage 61 will also take away the heat generated by the light source substrate 4. In this design, firstly, from the perspective of the heat diffusion path, the heat of the power supply 2 diffuses to the surroundings, and the heat of the light source substrate 4 also diffuses to the surroundings, but the diffusion positions are not at the same height, so the heat dissipation can be promoted from the spatial distribution method; secondly, the current direction between the power supply 2 and the light source substrate 4 is from top to bottom, so that the thermal path of the industrial and mining lamp does not overlap with the electrical path, thereby forming a thermoelectric separation, which can not only dissipate heat efficiently, but also will not affect the stability of the electrical path, so it helps to keep the industrial and mining lamp at a low temperature during long-term operation. In summary, the combination of spatial distribution and thermoelectric separation is used to achieve efficient heat dissipation of the industrial and mining lamp. Example

[0041] Reference Figure 3 and Figure 4 , which is different from Example 1, is that in order to enable the mining lamp to actively dissipate heat, that is, to allow the air to actively flow to the location of the mining lamp, the following settings are correspondingly provided: the mounting plate 1 includes a central fixed portion 12 and a peripheral movable portion 13, the central fixed portion 12 is provided for the installation column 11, the peripheral movable portion 13 is rotatably sleeved on the central fixed portion 12, the peripheral movable portion 13 is provided for the heat dissipation fins 5, a driven gear ring 9 is provided on the upper side of the peripheral movable portion 13, a driving motor 91 is provided on the peripheral side of the power supply 2, the output shaft of the driving motor 91 is connected to a driving gear 92, the driving gear 92 is meshed with the driven gear ring 9, and a fan blade single plate 93 is provided at one end of the air passage 61 close to the lower side of the focusing ring 6.

[0042] Reference Figure 3 and Figure 4 With the cooperation of the driving motor 91, the driving gear 92 and the driven gear ring 9, the peripheral active part 13 will rotate relative to the central fixed part 12. In this process, the multiple fan blade single plates 93 will form an effect similar to that of a fan, and let the surrounding airflow gather near the industrial and mining lamp, so active heat dissipation can be formed. At the same time, this airflow will not directly pass through the driving motor 91, so as to promote the heat dissipation of the industrial and mining lamp without blocking the motor with dust.

[0043] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A high-efficiency heat dissipation mining lamp, characterized by: include: A mounting plate (1) having a mounting column (11) disposed on its upper side; A power source (2) connected to the upper end of the mounting column (11); A lens (3) connected to the lower side of the mounting plate (1); A light source substrate (4) is arranged between the mounting plate (1) and the lens (3); a heat dissipation fin (5), one end of which is connected to the upper side of the mounting plate (1), and the other end of which extends outside the peripheral side of the mounting plate (1); a plurality of the heat dissipation fins (5) are distributed in a circular pattern around the power source (2); and a heat introduction channel (51) is formed between two adjacent heat dissipation fins (5); A focusing ring (6) is sleeved on one end of the plurality of heat dissipation fins (5) away from the mounting plate (1), and an air passage (61) is formed between the focusing ring (6) and the heat dissipation fins (5).

2. The high-efficiency heat dissipation mining lamp according to claim 1, characterized in that: The heat dissipation fins (5) are perpendicular to the mounting plate (1), and the inner diameter of the upper side of the focusing ring (6) is smaller than the inner diameter of the lower side.

3. The high-efficiency heat dissipation mining lamp according to claim 2, characterized in that: The focusing ring (6) is provided with inner and outer convection holes (62) close to a side of the focusing ring (6) with a smaller inner diameter, and the inner and outer convection holes (62) are connected to the gas passage (61).

4. The high-efficiency heat dissipation mining lamp according to claim 2, characterized in that: The portion of the heat dissipation fin (5) close to the focusing ring (6) is longer in the vertical direction than the portion close to the mounting plate (1).

5. The high-efficiency heat dissipation mining lamp according to claim 2, characterized in that: A flow guide mesh plate (63) is provided at the end of the air passage (61) close to the focusing ring (6) with a smaller inner diameter, and the flow guide mesh plate (63) is used to guide the air flow in the direction of the heat introduction passage (51).

6. The high-efficiency heat dissipation mining lamp according to claim 2, characterized in that: The length of the mounting column (11) is greater than the length of the heat dissipation fin (5) in the vertical direction.

7. The high-efficiency heat dissipation mining lamp according to claim 1, characterized in that: A heat-conducting rod (7) is arranged on the upper side of the mounting plate (1), one of the heat-conducting rods (7) is located between two adjacent heat-dissipating fins (5), one end of the heat-conducting rod (7) is close to the center of the mounting plate (1), and the other end extends into the heat-conducting channel (51); A heat-conducting adhesive strip (8) is bonded to the light source substrate (4), and the heat-conducting adhesive strip (8) extends along the diameter of the light source substrate (4).

8. The high-efficiency heat dissipation mining lamp according to claim 7, characterized in that: The plurality of heat-conducting rods (7) are divided into two groups, wherein one end of the heat-conducting rods (7) away from the heat-conducting channel (51) is located between the power source (2) and the mounting plate (1), and the other end of the heat-conducting rods (7) away from the heat-conducting channel (51) penetrates into the power source (2).

9. The high-efficiency heat dissipation mining lamp according to claim 1, characterized in that: The mounting plate (1) comprises a central fixed portion (12) and a peripheral movable portion (13), wherein the central fixed portion (12) is provided for the mounting column (11), the peripheral movable portion (13) is rotatably sleeved on the central fixed portion (12), the heat dissipation fins (5) are provided for the peripheral movable portion (13), and a driven gear ring (9) is provided on the upper side of the peripheral movable portion (13); a driving motor (91) is provided on the peripheral side of the power source (2), the output shaft of the driving motor (91) is connected to a driving gear (92), and the driving gear (92) is meshed with the driven gear ring (9); a fan blade single plate (93) is provided at one end of the air passage (61) close to the lower side of the focusing ring (6), and is used to form an airflow flowing into the air passage (61) through a plurality of the fan blade single plates when the peripheral movable portion (13) rotates.

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