Ceiling fans

Abstract

To provide a ceiling fan capable of obtaining a sufficient amount of air even when rotating at a low speed. [Solution] The device includes an illumination section 20 and a blower section 30. The blower section 30 is switchable between a stopped state PF1 in which the rotation of the blades 60 is stopped and the blades 60 are in a closed position relative to the illumination section 20, and a blower state PF2 in which the blades 60 are rotated and are in an open position relative to the illumination section 20 to an opening angle according to the rotation speed. In the stopped state PF1, the blades 60 include a blade main body 63 that faces a side surface of the illumination section 20 and has a side surface facing portion 67 that extends in the circumferential direction of the side surface of the illumination section 20. In the blower state PF2, the blower section 30 puts each of the blade main bodies 63 of the blades 60 in an open position relative to the side surface of the illumination section 20.

Description

[Technical field]

[0001] The present invention relates to a ceiling fan that has a plurality of blades and a lighting unit and can be attached to a ceiling. [Background technology]

[0002] Conventionally, ceiling fans that can be attached to a ceiling are known (see, for example, Patent Document 1). Ceiling fans are provided with multiple blades. Rotating the blades of a ceiling fan attached to a ceiling creates an air flow between the ceiling and the floor. This air flow can stir and circulate the air in the room, making it possible to equalize the room temperature that has caused a temperature difference due to heating and cooling, etc. The ceiling fan disclosed in Patent Document 1 also functions as a lighting fixture by providing a lighting section below the air blowing section.

[0003] In the ceiling fan disclosed in Patent Document 1, even when the blades are stopped, the multiple blades remain open radially toward the lighting unit. Therefore, when using only the lighting function of the ceiling fan without rotating the blades, the multiple radially open blades may block the light from the lighting unit and cast a shadow on the ceiling. In addition, the multiple radially open blades may be perceived as an eyesore.

[0004] For this reason, there is also known a ceiling fan in which the blades are stopped and the fan is used as a lighting fixture so that the blades can be closed relative to the lighting unit (see, for example, Patent Document 2).

[0005] The ceiling fan disclosed in Patent Document 2 has multiple blades arranged above a lighting unit. The multiple blades can change position between a state in which they are open radially toward the lighting unit (FIG. 3) and a state in which they are closed and overlap each other (FIG. 4). When the multiple blades are closed, they are housed inside the lighting unit in a plan view.

[0006] Therefore, according to the ceiling fan disclosed in Patent Document 2, when the blades are stopped and only the lighting function of the ceiling fan is used, the stopped blades do not block the light from the lighting unit and are less likely to cast shadows on the ceiling. Also, since the multiple blades are housed inside the lighting unit, the blades can be made less noticeable.

[0007] The opening and closing mechanism of the multiple blades in Patent Document 2 utilizes the elastic force of an elastic body and the centrifugal force generated when the blades rotate. As disclosed in FIG. 8, each blade can rotate around a rotating shaft 12 between an open state and a closed state. In addition, each blade is biased by the elastic force of a spring 16 to be in a closed position around the rotating shaft 12. When the motor 3 rotates the multiple blades, centrifugal force is applied to each blade, and the blades change to an open state against the elastic force of the spring 16. The centrifugal force applied to each blade changes depending on the rotation speed of the blade. Therefore, when the rotation speed of the blades is low, the opening angle of each blade is small, and as the rotation speed of the blades increases, the opening angle of each blade increases.

[0008] The opening / closing mechanism of the multiple blades in Patent Document 3 has an interlocking mechanism for the multiple blades in addition to the opening / closing mechanism in Patent Document 2. In the opening / closing mechanism in Patent Document 3, each blade can rotate between an open state and a closed state around a rotation shaft 7. The multiple blades are configured to rotate in an interlocking manner by a connecting cable 14. [Prior art documents] [Patent documents]

[0009] [Patent Document 1] JP 2002-21776 A [Patent Document 2] U.S. Pat. No. 1,445,402 [Patent Document 3] U.S. Pat. No. 1,458,348 Summary of the Invention [Problem to be solved by the invention]

[0010] Incidentally, in the ceiling fan disclosed in Patent Document 2, when the blades are closed (FIG. 4), the blades are arranged so as to overlap vertically in the space between lower canopy 5 and upper canopy 6 (FIG. 2). To compactly accommodate the blades in the space between lower canopy 5 and upper canopy 6, it is necessary to shorten the length of each blade, reduce the vertical thickness, and reduce the pitch (twist).

[0011] However, when the length of each blade is shortened, the thickness in the vertical direction is reduced, and the pitch (twist) is reduced, there is a problem that sufficient airflow cannot be obtained even when the blades are rotated by the motor 3 and opened radially toward the lighting unit (FIG. 3). In order to obtain a sufficient airflow, the blades must be rotated at high speed, which increases power consumption and generates noise.

[0012] In addition, in the ceiling fan disclosed in Patent Document 2, when the blades are closed (FIG. 4), the blades are housed inside the lighting unit in a plan view. When the rotation speed of the blades is low, the opening angle of each blade is small, and when viewed from above, each blade is partially overlapped with the lighting unit. For this reason, when the rotation speed of the blades is low, the blade length of each blade cannot be effectively utilized, and not only is the airflow generated by each blade small, but the airflow generated by each blade interferes with the lighting unit, resulting in a problem of insufficient airflow.

[0013] The present invention has been made to solve the above-mentioned problems, and aims to provide a ceiling fan which, when the blades are stopped to use the lighting function of the ceiling fan, is such that the stopped blades are less likely to block the light from the lighting section, making the blades less noticeable, and which can obtain a sufficient amount of air even when rotating at a slow speed by ensuring the length and vertical dimensions of the blades. [Means for solving the problem]

[0014] The ceiling fan of the present invention is a ceiling fan that can be attached to a ceiling, A lighting section; A blower that blows air by rotating a plurality of blades, The blower section includes: a stopped state in which the rotation of the plurality of blade portions is stopped and the plurality of blade portions are in a closed position relative to the lighting portion; a blowing state in which the plurality of blade units are rotated to open the plurality of blade units relative to the lighting unit at an opening angle corresponding to a rotation speed; It is possible to switch between The blade portion is a blade main body having a side surface facing portion that faces a side surface of the illumination unit in the stopped state and extends in a circumferential direction of the side surface of the illumination unit, The blower section includes: In the air blowing state, the blade main body of each of the plurality of blades is in an open position relative to a side surface of the illumination unit. Effect of the Invention

[0015] With the ceiling fan of the present invention, when the blades are stopped and the lighting function of the ceiling fan is used, the multiple stopped blades are less likely to obstruct the light from the lighting section, making the blades less noticeable, and by ensuring the length and vertical dimensions of the blades, a sufficient amount of air can be obtained even when rotating at a slow speed. [Brief description of the drawings]

[0016] [Figure 1] FIG. 1 is a side view of a ceiling fan in a stopped state. [Diagram 2] FIG. 2 is a side view of the ceiling fan in a blowing state. [Diagram 3] FIG. 3 is a perspective view of the ceiling fan when stopped, as viewed from above. [Figure 4] FIG. 4 is a perspective view of the ceiling fan in the blowing state as viewed from above. [Diagram 5] FIG. 5 is a plan view showing a part of a drive unit of a ceiling fan. [Figure 6] FIG. 6 is a side view showing the range of the side facing parts of the blades in a ceiling fan in a blowing state. [Figure 7] FIG. 7 is a side view showing the range of the side facing parts of the blades in a stopped ceiling fan. [Figure 8] FIG. 8 is a side view showing the range of the side facing parts of the blades in a ceiling fan in a blowing state. [Figure 9] FIG. 9 is a bottom view of the ceiling fan in a stopped state. [Figure 10] FIG. 10 is a bottom view of the ceiling fan in the blowing state. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0017] The ceiling fan according to one embodiment of the present invention is a ceiling fan that can be attached to a ceiling, A lighting section; A blower that blows air by rotating a plurality of blades, The blower section includes: a stopped state in which the rotation of the plurality of blade portions is stopped and the plurality of blade portions are in a closed position relative to the lighting portion; a blowing state in which the plurality of blade units are rotated to open the plurality of blade units relative to the lighting unit at an opening angle corresponding to a rotation speed; It is possible to switch between The blade portion is a blade main body having a side surface facing portion that faces a side surface of the illumination unit in the stopped state and extends in a circumferential direction of the side surface of the illumination unit, The blower section includes: In the air blowing state, the blade main body of each of the plurality of blades is in an open position toward a side surface of the illumination unit (first configuration).

[0018] According to the above configuration, the blowing unit is switchable between a stopped state in which the rotation of the multiple blade portions is stopped and the multiple blade portions are in a closed position relative to the lighting unit, and an air blowing state in which the multiple blade portions are rotated and the multiple blade portions are in an open position relative to the lighting unit so that the opening angle corresponds to the rotation speed. Therefore, when the blades are stopped and the lighting function of the ceiling fan is used, the stopped blades are less likely to block the light from the lighting unit, making the blades less noticeable. In addition, the blade portion has a blade main body that faces the side of the lighting portion when in a stopped state and has a side facing portion extending circumferentially of the side of the lighting portion, and in the air blowing state, the blade main body of each of the multiple blade portions is in an open position relative to the side of the lighting portion. Since the blades are disposed on the side of the lighting unit, the lengthwise and vertical dimensions of the blades are not limited by the space in which they are housed, and sufficient dimensions can be ensured. In addition, in the air blowing state, the main body of each of the multiple blades is in an open position relative to the side of the lighting unit, so that a sufficient amount of air can be obtained even when the rotation speed of the blades is low.

[0019] In the first configuration, The side surface facing portion is In the stopped state and the air blowing state, the fan may be disposed outside the illumination unit in a plan view (second configuration).

[0020] According to the above configuration, the side surface facing portion is disposed outward from the illumination portion in a plan view in the stopped state and in the air blowing state. Therefore, even when the rotation speed of the blades is low and the opening angle of each blade is small, the side facing portion of each blade does not overlap the lighting portion in a plan view. This makes it possible to effectively utilize the blade length of each blade even when the rotation speed of the blades is low, and it is possible to generate a sufficient airflow by each blade and to make it difficult for the airflow generated by each blade to interfere with the lighting portion. Therefore, it is possible to obtain a sufficient amount of airflow even when the rotation speed of the blades is low.

[0021] In the second configuration, The plurality of blade portions include In the stopped state, the blade main bodies of adjacent blades may be arranged to overlap each other in a side view (third configuration).

[0022] According to the above configuration, the plurality of blades are arranged such that, in a stopped state, the blade main bodies of adjacent blades overlap each other in a side view. Therefore, when in a stopped state, the multiple blades can be closed relative to the illumination unit in a compact manner. In addition, the main blade portions of adjacent blade portions overlap each other in a side view, and no gaps are created between adjacent blade portions, so that light from the lighting portion can be prevented from inadvertently leaking to the side.

[0023] In the third configuration, The blade main body is The height in the up-down direction may be approximately constant from one end side, which is the free end, to the other end side (fourth configuration).

[0024] According to the above-described configuration, the height of the blade main body in the up-down direction is approximately constant from one end side, which is the free end, to the other end side. Therefore, the plurality of blades surround the lighting unit at a substantially constant height when viewed from the side in a stopped state, which allows the plurality of blades to uniformly reflect the light from the lighting unit, enabling the lighting device to irradiate the indoor space with uniform light.

[0025] In the fourth configuration, The blower section includes: a drive unit that rotates the plurality of blade units and changes the position of the plurality of blade units between a closed position and an open position with respect to the illumination unit; The drive unit is The plurality of blade portions may be rotated and linked to have an opening angle corresponding to the rotation speed, thereby opening the blade portions relative to the illumination portion (fifth configuration).

[0026] According to the above configuration, the drive unit rotates the plurality of blades, and links the plurality of blades to an opening angle according to the rotation speed, thereby opening the blades relative to the illumination unit. Therefore, even when the rotation speed of the blades is low and the opening angle of each blade is small, the side facing portion of each blade does not overlap the lighting portion in a plan view. This makes it possible to effectively utilize the blade length of each blade even when the rotation speed of the blades is low, and it is possible to generate a sufficient airflow by each blade and to make it difficult for the airflow generated by each blade to interfere with the lighting portion. Therefore, it is possible to obtain a sufficient amount of airflow even when the rotation speed of the blades is low. In addition, as the rotation speed of the blades increases, the multiple blades are linked together to take an open position relative to the lighting unit, increasing the opening angle of each blade and generating an airflow that corresponds to the rotation speed of the blades.

[0027] [Embodiment 1] Hereinafter, a ceiling fan 100 according to an embodiment of the present invention will be described in detail with reference to the drawings. In the following figures, an arrow U indicates the upward direction of the ceiling fan 100, and an arrow D indicates the downward direction.

[0028] In the following drawings, the same or corresponding parts are denoted by the same reference numerals, and the description thereof will not be repeated. In order to facilitate understanding of the description, the drawings referred to below show simplified or schematic configurations, and some components are omitted. Furthermore, the dimensional ratios between components shown in each drawing do not necessarily represent the actual dimensional ratios.

[0029] [Overall configuration] Fig. 1 is a side view of ceiling fan 100 in stopped state PF1. Fig. 2 is a side view of ceiling fan 100 in air-blowing state PF2. Fig. 3 is a perspective view of ceiling fan 100 from above in stopped state PF1. Fig. 4 is a perspective view of ceiling fan 100 from above in air-blowing state PF2. As shown in Figs. 1 to 4, ceiling fan 100 has a fixed section 10, a lighting section 20, and an air-blowing section 30.

[0030] The fixing part 10 is a member for attaching the ceiling fan 100 to a ceiling S. The fixing part 10 has an attachment 11 and a fixing part cover 13.

[0031] The attachment 11 is a member that is fixed directly to the ceiling S or fixed to a wiring device installed on the ceiling S.

[0032] The fixed part cover 13 is a member that covers the attachment 11 and wiring devices and the like installed on the ceiling S. The fixed part cover 13 is formed in a cylindrical shape with a bottom, and is fixed to the attachment 11 attached to the ceiling S. As shown in FIG. 2, a support shaft 15 and a main body cover 17 are fixed to the bottom of the fixed part cover 13.

[0033] 2, the support shaft 15 is a member that suspends the lighting unit 20 and the blower unit 30 from the fixed unit 10. The upper end of the support shaft 15 is fixed to the bottom of the fixed unit cover 13. The lighting unit 20 is fixed to the lower end of the support shaft 15.

[0034] Near the lower end of the support shaft 15, the blower 30 is supported rotatably relative to the support shaft 15. Specifically, a drive unit 40 (drive motor 45) constituting the blower 30 is supported rotatably relative to the support shaft 15. An interlocking mechanism 50 (interlocking mechanism main body 51) is fixed to the drive motor 45 and configured to rotate together with the drive motor 45. A plurality of blades 60 are attached to this interlocking mechanism 50. As a result, the plurality of blades 60 are driven to rotate around the support shaft 15. A drive control unit 46 that controls the drive of the drive motor 45 is disposed above the drive motor 45. The drive control unit 46 is fixed to the support shaft 15.

[0035] The upper part of the main body cover 17 is fixed to the bottom part of the fixed part cover 13. The main body cover 17 covers the support shaft 15, the drive motor 45, and the drive control part .

[0036] The lighting unit 20 has a lighting unit main body 21 and a lighting cover 23. The lighting unit main body 21 is a member that serves as the base of the lighting unit 20. The lighting unit main body 21 is formed of sheet metal, and is formed in a circular shape in a plan view in this embodiment. The lighting unit main body 21 is fixed to the lower end of the support shaft 15. An LED light source (not shown), a power supply device (not shown), a lighting device (not shown), and the like are arranged on the lower surface of the lighting unit main body 21. The power supply device and the lighting device are devices for lighting the LED light source. The power supply device is electrically connected to an external power source supplied from the ceiling S.

[0037] The lighting cover 23 is attached so as to cover the lower surface side of the lighting unit main body 21. The lighting cover 23 distributes light to the outside while reflecting and diffusing light from the LED light source. The lighting cover 23 is made of a translucent resin material. The lighting cover 23 is structured so as to be detachable from the lighting unit main body 21 for maintenance of the inside of the lighting cover 23, etc.

[0038] The blower 30 has a drive unit 40 and a plurality of blade units 60. The blower 30 blows air by rotating the plurality of blade units 60. In this embodiment, the blower 30 is provided with four blade units 60.

[0039] 2, the drive unit 40 has a drive motor 45, a drive control unit 46, and an interlocking mechanism 50. As described above, the drive motor 45 is rotatably supported by the support shaft 15. The drive control unit 46 is electrically connected to an external power source supplied from the ceiling S.

[0040] The interlocking mechanism 50 is a mechanism that rotates the plurality of blades 60 in one direction toward the rotation direction RD and rotates each blade 60 forward or backward toward the direction D1 or the direction D2, thereby changing the position of the plurality of blades 60 relative to the illumination unit 20 between a closed position and an open position (see Figs. 3, 4, and 5). The interlocking mechanism 50 is composed of an interlocking mechanism main body 51 and the like. As shown in Fig. 2, the interlocking mechanism main body 51 is fixed to the lower surface of the drive motor 45 and is rotatable together with the drive motor 45 about the support shaft 15. The plurality of blades 60 are attached to the interlocking mechanism 50 as shown in Figs. 3 and 4. As a result, the plurality of blades 60 are driven to rotate in one direction toward the rotation direction RD around the support shaft 15.

[0041] The interlocking mechanism 50 interlocks the blades 60 so that the blades 60 have an opening angle according to the rotation speed, and opens the blades 60 relative to the illumination unit 20 (FIGS. 3 and 4). In this embodiment, the interlocking mechanism 50 rotates the blades 60 in one direction toward the rotation direction RD, and rotates each blade 60 forward or backward toward the direction D1 or D2 by utilizing the centrifugal force acting on each blade 60 according to the rotation speed. This makes it possible to change the position of the blades 60 between a closed position and an open position relative to the illumination unit 20. The configuration of the interlocking mechanism 50 will be described in detail later.

[0042] 3 and 4, the blade portion 60 has a support portion 61 and a blade portion main body 63. The support portion 61 is a portion that is connected to the interlocking mechanism 50. The blade portion main body 63 is formed so as to be continuous with the support portion 61. If one end of the blade portion main body 63 that is continuous with the support portion 61 is defined as a first end portion 65, and the other end portion, which is a free end, is defined as a second end portion 66, the blade portion main body 63 is curved in an arc shape from the first end portion 65 to the second end portion 66 so as to fit along the side surface of the illumination portion 20 in the stopped state PF1.

[0043] The blower unit 30 can switch the position of the blades 60 between a stopped state PF1 and a blowing state PF2 by linking the blades 60 to an opening angle corresponding to the rotation speed. In the stopped state PF1, the rotation of the blades 60 is stopped and the blades 60 are in a closed position relative to the lighting unit 20. In the blowing state PF2, the blades 60 are in an open position relative to the lighting unit 20 so that the blades 60 have an opening angle corresponding to the rotation speed.

[0044] The opening angle of the blades 60 in the blowing state PF2 is not constant, but varies depending on the rotation speed. The opening angle of the blades 60 shown in Fig. 4 shows a state in which the blades 60 are rotated at a certain rotation speed. When the rotation speed of the blades 60 is high, the opening angle of each blade 60 becomes large, and when the rotation speed of the blades 60 is low, the opening angle of each blade 60 becomes small.

[0045] The operation of ceiling fan 100 can be remotely controlled by remote control 90 (FIG. 1). A control signal transmitted from a transmitter of remote control 90 is received by a receiver (not shown), allowing the lighting unit 20 to be switched on and off, the illuminance to be adjusted, and the air blower unit 30 to be switched on and off and the air volume to be adjusted.

[0046] 5 is a plan view showing a part of drive unit 40 of ceiling fan 100. In order to make it easier to understand the configuration of interlocking mechanism 50, Fig. 5 shows only one of the multiple blades 60 attached to interlocking mechanism 50. Interlocking mechanism 50 is made up of interlocking mechanism main body 51, rotating unit 52, interlocking ring 53, link member 55, and elastic member 56.

[0047] The interlocking mechanism body 51 is made of sheet metal, and in this embodiment, is formed in a circular shape in a plan view. The interlocking mechanism body 51 is formed to have a smaller diameter than the illumination unit body 21 so as to be housed in a recess formed in the upper surface of the illumination unit body 21 (see FIG. 4). The lower surface of the drive motor 45 is fixed to the upper surface of the interlocking mechanism body 51. This allows the interlocking mechanism 50 (interlocking mechanism body 51) to rotate together with the drive motor 45 in one direction relative to the support shaft 15 in the rotation direction RD.

[0048] On the lower surface side of the interlocking mechanism main body 51, the rotating part 52, the interlocking ring 53, the link member 55, and the elastic member 56 are arranged. The rotating parts 52 are arranged at four positions on a concentric circle so as to correspond to the mounting positions of the blade parts 60. The rotating parts 52 are rotatably attached to the interlocking mechanism main body 51. A blade fixing part (not shown) capable of fixing the blade parts 60 is arranged on the upper surface side of the interlocking mechanism main body 51, and the blade fixing part (not shown) and the rotating part 52 are configured to rotate as a unit. Therefore, by mounting the blade parts 60 to the blade fixing part on the upper surface side of the interlocking mechanism main body 51, the blade parts 60 and the rotating part 52 are connected, and each blade part 60 can be rotated in the forward and reverse directions in the direction D1 or the direction D2.

[0049] The interlocking ring 53 is an annular member, and is disposed inside the four rotating parts 52. The interlocking ring 53 is disposed rotatably relative to the interlocking mechanism body 51 in the directions R1 and R2.

[0050] The link members 55 connect the four rotating parts 52 to the interlocking ring 53. Since the four rotating parts 52 are connected to the interlocking ring 53 via the link members 55, the four rotating parts 52 can be rotated in a coordinated manner. This allows the four blades 60 attached to the four rotating parts 52, respectively, to be rotated in a coordinated manner in the directions D1 and D2.

[0051] One end of the elastic member 56 is fixed to the interlocking mechanism body 51, and the other end is connected to the interlocking ring 53. The elastic member 56 is, for example, a coil spring. The elastic member 56 biases the interlocking ring 53 to rotate in the direction R2. By biasing the interlocking ring 53 to rotate in the direction R2, the interlocking ring 53 biases each of the four rotating parts 52 via the link member 55 to rotate clockwise in the figure. As a result, the four blade parts 60 are biased in a coordinated manner in the direction D2 to assume a closed posture (stopped state PF1).

[0052] When the drive motor 45 is driven to rotate and the interlocking mechanism 50 (interlocking mechanism body 51) is rotated together with the drive motor 45 in the rotation direction RD relative to the support shaft 15, a centrifugal force according to the rotation speed acts on the four blades 60, and each blade is urged in the direction D1 to assume an open position (air blowing state PF2) relative to the interlocking mechanism body 51. The centrifugal force acting on the blades 60 urges each of the four rotating parts 52 to rotate counterclockwise as shown in the figure. This urging force is transmitted from the four rotating parts 52 to the interlocking ring 53 via the link member 55, and urges the interlocking ring 53 to rotate in the direction R1.

[0053] Due to a balance between the biasing force of the centrifugal force that rotates the interlocking ring 53 in direction R1 and the biasing force of the elastic member 56 that rotates the interlocking ring 53 in direction R2, the interlocking mechanism 50 interlocks the multiple blades 60 to an opening angle that corresponds to the rotation speed (see FIGS. 3 and 4). That is, when the rotation speed of the four blades 60 in the rotation direction RD is relatively low, the centrifugal force acting on the four blades 60 is also small, so the opening angle of the four blades 60 is small. When the rotation speed of the four blades 60 in the rotation direction RD is relatively high, the centrifugal force acting on the four blades 60 is also large, so the opening angle of the four blades 60 is large. In this embodiment, the interlocking mechanism 50 rotates the multiple blade portions 60, utilizing the centrifugal force generated in each blade portion 60 to change the position of the multiple blade portions 60 between a closed position and an open position relative to the lighting portion 20.

[0054] Fig. 6 is a side view showing the range of the side facing portion 67 of the blade portion 60 in the ceiling fan 100 in the blowing state PF2. Fig. 7 is a side view showing the range of the side facing portion 67 of the blade portion 60 in the ceiling fan 100 in the stopped state PF1. Fig. 8 is a side view showing the range of the side facing portion 67 of the blade portion 60 in the ceiling fan 100 in the blowing state PF2. Fig. 9 is a bottom view of the ceiling fan 100 in the stopped state PF1. Fig. 10 is a bottom view of the ceiling fan 100 in the blowing state PF2.

[0055] As shown in Fig. 6, when the position of the upper surface of illumination section 20 is indicated by imaginary line L1, main blade portion 63 of blade portion 60 has an area located below imaginary line L1. Since the area located below imaginary line L1 faces the side surface of illumination section 20, this area is referred to as side surface facing portion 67. In Fig. 6, side surface facing portion 67 is shown by hatching. Also in Figs. 7 to 10, side surface facing portion 67 is shown by hatching.

[0056] 7 and 9, in ceiling fan 100 in stopped state PF1, side surface facing portions 67 of blades 60 extend in the circumferential direction of the side surface of lighting unit 20. In addition, in air blowing state PF2, air blowing unit 30 has side surface facing portions 67 of each of multiple blades 60 open toward the side surface of lighting unit 20, as shown in Figs.

[0057] As shown in FIG. 7 to FIG. 10, the side surface facing portion 67 is disposed outside the lighting portion 20 in a plan view in the stop state PF1 and the blowing state PF2. Therefore, even when the rotation speed of the blade portion 60 is low and the opening angle of each blade portion 60 is small, the side surface facing portion 67 of each blade portion 60 does not overlap the lighting portion 20 in a plan view. As a result, even when the rotation speed of the blade portion 60 is low, the blade length of each blade portion 60 can be effectively utilized, and each blade portion 60 can generate a sufficient air flow. In addition, since the side surface facing portion 67 of each blade portion 60 does not overlap the lighting portion 20, the air flow generated by each blade portion 60 can be made less likely to interfere with the lighting portion 20. As a result, a sufficient amount of air can be obtained even when the rotation speed of the blade portion 60 is low.

[0058] 1 and 3, the multiple blades 60 are arranged such that, in the stopped state PF1, the blade main bodies 63 of adjacent blades 60 overlap each other in a side view. Therefore, in the stopped state PF1, the multiple blades 60 can be closed compactly relative to the illumination unit 20.

[0059] In addition, the blade main bodies 63 of adjacent blade portions 60 overlap each other in a side view, and no gaps are created between adjacent blade portions 60. As a result, as shown in FIG. 9, it is possible to prevent light from the illumination section 20 from inadvertently leaking to the side.

[0060] 1 to 4, the height of the blade main body 63 in the up-down direction is substantially constant from the first end 65 to the second end 66. Therefore, the blades 60 surround the lighting unit 20 at a substantially constant height when viewed from the side in the stopped state PF1. Therefore, as shown in Fig. 9, the blades 60 can uniformly reflect the light from the lighting unit 20, and can irradiate the indoor space with uniform light as a lighting fixture.

[0061] According to the ceiling fan 100 of this embodiment described above, the blower section 30 is switchable between a stopped state PF1 in which the rotation of the multiple blade sections 60 is stopped and the multiple blade sections 60 are in a closed position relative to the lighting section 20, and an air blowing state PF2 in which the multiple blade sections 60 are rotated and the multiple blade sections 60 are in an open position relative to the lighting section 20 so that the opening angle corresponds to the rotation speed.

[0062] Therefore, when the blades 60 are stopped and the lighting function of the ceiling fan 100 is used, the stopped blades 60 are less likely to block the light from the lighting unit 20, making it possible to make the blades 60 less noticeable.

[0063] Moreover, blade portion 60 includes a blade main body 63 that faces a side surface of illumination unit 20 in stopped state PF1 and has a side surface facing portion 67 extending in the circumferential direction of the side surface of illumination unit 20. In air blowing state PF2, blower unit 30 has blade main bodies 63 of each of the multiple blade portions 60 in an open position relative to the side surface of illumination unit 20.

[0064] Because the blade portions 60 are disposed on the side surfaces of the lighting unit 20, the lengthwise dimensions and vertical dimensions of the blade portions 60 are not limited by the storage space for the blade portions 60, and sufficient dimensions can be ensured. In the air blowing state PF2, the blade portion main bodies 63 of each of the multiple blade portions 60 are in an open position relative to the side surfaces of the lighting unit 20, so that a sufficient amount of air can be obtained even when the rotation speed of the blade portions 60 is low.

[0065] [Variations] The ceiling fan according to the present invention described above is not limited to the present embodiment. For example, in the present embodiment, the shape of the blade 60 is such that the height in the up-down direction is substantially constant from the first end 65 to the second end 66 of the blade main body 63, but is not limited to this shape.

[0066] The mechanism for rotating the blades and the mechanism for linking the blades are not limited to the mechanism of this embodiment, and other well-known mechanisms may be used, such as the rotation mechanism disclosed in Patent Document 2 or the linking mechanism disclosed in Patent Document 3.

[0067] The means for mounting the ceiling fan on the ceiling, the shape of the cover or the main body, etc. are not limited to those in this embodiment.

[0068] Although the embodiment of the present invention has been described above, the above-mentioned embodiment is merely an example for carrying out the present invention. Therefore, the present invention is not limited to the above-mentioned embodiment, and the above-mentioned embodiment can be appropriately modified and carried out without departing from the spirit of the present invention. [Explanation of symbols]

[0069] 100 Ceiling Fan 20 Lighting Department 30 Blower section 60 Wing 67 Side facing part 63 Main blade part PF1 stopped state PF2 Blowing state S ceiling

Claims

1. A ceiling fan that can be attached to a ceiling, A lighting section; A blower that blows air by rotating a plurality of blades, The blower section includes: a linking mechanism that links the plurality of blades to an open position relative to the illumination unit so that the plurality of blades have an opening angle corresponding to a rotation speed; a stopped state in which the rotation of the plurality of blade portions is stopped and the plurality of blade portions are in a closed position relative to the lighting portion; a blowing state in which the plurality of blade units are rotated to open the plurality of blade units relative to the lighting unit at an opening angle corresponding to a rotation speed; It is possible to switch between The interlocking mechanism is accommodated in a recess formed in an upper surface of the illumination unit, The blade portion is a blade main body having a side surface facing portion that faces a side surface of the illumination unit in the stopped state and extends in a circumferential direction of the side surface of the illumination unit, The side surface facing portion has a portion located to the side of the interlocking mechanism, In the stopped state and the air blowing state, the air blowing unit is disposed outside the illumination unit in a plan view. Ceiling fan.

2. The plurality of blade portions include In the stopped state, the blade main bodies of the adjacent blades are arranged to overlap each other in a side view.

2. The ceiling fan of claim 1.

3. The blade main body is The height in the vertical direction is approximately constant from one end side, which is the free end, to the other end side.

3. The ceiling fan according to claim 2.

Images