A fan which can be opened in both directions

Abstract

The application discloses a reversible fan, which relates to a fan. The fan comprises a plurality of stacked fan blades, and the tail ends of the fan blades are rotationally connected through a pin shaft. The fan blade comprises a wide part at the lower part and a narrow part at the upper part, and the narrow parts are connected with fan surfaces in the shape of a fan. The width of the narrowest part is 3-6 times the width of the narrow part of the fan blade when the fan surfaces between the adjacent fan blades are fully unfolded to the right. The fan blade is divided into the wide part at the lower part and the narrow part at the upper part, the length of the narrow part of the fan blade is set to 1 / 4-2 / 5 of the length of the wide part, and the fan surfaces are connected between the narrow parts. The spacing between the arc-shaped edges of the fan surfaces is greatly reduced, thereby effectively improving the minimum width of the fan surfaces between the adjacent fan blades in the unfolded state, increasing the narrowest width of the fan surfaces between the adjacent two narrow parts in the fully unfolded state to 3-6 times the width of the narrow part, and increasing the area of the fan after being unfolded reversely by more than 100%. The fan surfaces have sufficient fan area whether unfolded reversely or not.

Description

Technical Field

[0001] This invention relates to a fan, specifically a fan that can be opened in both directions. Background Technology

[0002] Paper fans or cloth fans include fan blades and fan surfaces 2 set between the fan blades 1. The fan surfaces 2 can be printed with exquisite calligraphy, paintings, paper-cutting and other artworks, and can form a good display of artworks, which is unmatched by other types of fans.

[0003] like Figure 6 As shown, in order to ensure a good airflow effect, the fan surface 2 occupies more than 70% of the surface area of ​​the entire fan in the prior art. This makes the narrowest part of the fan surface between adjacent fan blades 1 very narrow, and it can only open to the right. When it opens to the left, the fan surface between adjacent fan blades 1 will go to the left and bypass the left fan blade 1. At the same time, it will also go to the left and bypass the right fan blade 1, occupying a large amount of fan surface 2 space.

[0004] The width 'a' of the narrowest part of the fan surface 2 between adjacent fan blades 1 is very small. The size of the fan surface 2 opening to the left is related to the width 'a' of the narrowest part of the fan surface 2 in the unfolded state between adjacent fan blades 1. If the area of ​​the fan surface 2 is too large, the width of the narrowest part of the fan surface 2 in the unfolded state between adjacent fan blades 1 will be small, and the area opened to the left will be very small. If the minimum width 'a' of the fan surface after it is fully unfolded between adjacent fan blades 1 is smaller than the sum of the widths of the two adjacent fan blades 1, then when it opens to the left, the lower parts of the adjacent fan blades will overlap, which severely limits the area of ​​the fan surface that can be opened, making it very small and unable to be used in reverse.

[0005] If the size of the fan surface 2 is reduced, the hollow space between the lower parts of the fan blades 1 will increase, and the fan effect will be greatly reduced. If the circumferential size of the fan surface 2 between adjacent fan blades 1 is increased, the unfolded area when opened to the right may exceed the size of a semicircle, making it unusable. Summary of the Invention

[0006] The purpose of this invention is to provide a fan that can be opened in both directions, which can effectively solve the problems in the background art.

[0007] The technical solution to achieve the above objective is: a fan that can be opened in both directions, comprising multiple stacked fan blades, the tail ends of which are rotatably connected by pins, characterized in that: the fan blades include a wide portion at the bottom and a narrow portion at the top, the narrow portions are connected by fan-shaped fan surfaces, and when the fan surfaces between adjacent fan blades are fully opened to the right, the width of the narrowest part is 3-6 times the width of the narrow portion of the fan blade.

[0008] Furthermore, the length of the narrow portion is 1 / 4 to 1 / 3 of the length of the wide portion.

[0009] Furthermore, ventilation holes are provided on the wide portion of the fan blade.

[0010] Furthermore, the narrow section is located to the left of the wide section, and the left side of the narrow section is flush with the left side of the upper end of the wide section. On the fan surfaces of all fan blades except the top and bottom ones, on the fan surface on both sides, on the fan surface on the right side of the bottom fan blade, and on the fan surface on the left side of the top fan blade, two first creases are respectively provided. The distance between the two first creases is the same as the thickness of the corresponding fan blade, and the first crease closer to the corresponding fan blade is flush with the corresponding side edge of the corresponding fan blade. A fourth crease is provided in the middle of the fan surface between the narrow sections of the adjacent fan blades.

[0011] Furthermore, the right side of the fan blade is provided with an outwardly protruding arc-shaped protrusion, which partially or completely overlaps with the adjacent fan blade when the fan is opened to the right.

[0012] The beneficial effects of this invention are as follows: This invention divides the fan blades into a wide section at the bottom and a narrow section at the top. The length of the narrow section is set to 1 / 4 to 2 / 5 of the length of the wide section. The fan surface is connected between the narrow sections, which greatly reduces the spacing between the curved edges of the fan surface. This effectively increases the minimum width of the fan surface in the unfolded state between adjacent fan blades. It can increase the narrowest width of the fan surface in the fully unfolded state between two adjacent narrow sections to 3 to 6 times the width of the narrow section. This increases the area of ​​the fan after it is opened in the opposite direction by more than 100%, ensuring that the fan surface has a sufficient fan area regardless of whether it is opened in the forward or reverse direction.

[0013] Meanwhile, because the gaps between the narrow sections of the fan are relatively large, the fan surfaces are connected, and the wide sections overlap to reduce the area of ​​openwork and ensure the fan's blowing effect. Attached Figure Description

[0014] Figure 1 This is the front view of the invention opened to the right;

[0015] Figure 2 for Figure 1 Enlarged view of part A in the middle;

[0016] Figure 3 This is the front view of the invention opened to the left;

[0017] Figure 4 This is a diagram showing the connection relationship between the two adjacent narrow sections and the fan-shaped surface when the invention opens to the left;

[0018] Figure 5 This is a schematic diagram of the structure of the present invention in its closed state.

[0019] Figure 6 This is a schematic diagram of the structure of an existing fan. Detailed Implementation

[0020] like Figure 1-5As shown, the present invention includes multiple stacked fan blades 1, with the tail ends of the fan blades 1 connected by pins 2. Each fan blade 1 includes a wide portion 3 at the bottom and a narrow portion 4 at the top. The width c of the narrow portion 4 is 0.4-0.8 cm, and the length of the narrow portion 4 is 1 / 4-1 / 3 of the length of the wide portion 3. The narrow portions 4 are connected to fan surfaces 5, such that when the fan surfaces 5 between adjacent fan blades 1 are fully extended to the right, the width b of the narrowest part is 3-6 times the width of the narrow portion 4 of the fan blade 1.

[0021] The wide part 4 is provided with ventilation holes 7. When the air is blown to one side, some air passes through the ventilation holes 7 in the opposite direction, making the airflow more gentle and comfortable.

[0022] The left side wall of the narrow section 4 is flush with the left side wall of the wide section 3 near the narrow section 4. Two first creases 8 are provided on the fan surfaces 5 on both sides of each fan blade 1 except for the top and bottom fan blades 1, on the fan surface 5 on the right side of the bottom fan blade 1, and on the fan surface 5 on the left side of the top fan blade 5. The distance e between the two first creases 8 is the same as the thickness of the corresponding fan blade 1, and the first crease 8 near the corresponding fan blade 1 is flush with the corresponding side edge of the corresponding fan blade 1. A fourth crease 9 is provided in the middle of the fan surface 5 between the narrow sections 4 of the adjacent fan blades 1.

[0023] The right side of the fan blade 1 is provided with an outwardly protruding arc-shaped protrusion 6. When the fan is opened clockwise, the arc-shaped protrusion 6 partially or completely overlaps with the adjacent fan blade 5, reducing the hollow area of ​​the fan and improving the fan effect.

[0024] This invention sets the length of the narrow portion 4 of the fan blade 1 to 1 / 4-1 / 3 of the length of the wide portion 3, and connects the fan surface 5 between the narrow portions 4, greatly reducing the spacing f between the arc edges of the fan surface 5. This effectively increases the width b of the narrowest part of the fan surface in the fully unfolded state between adjacent fan blades 1, and can increase the width b of the narrowest part of the fan surface in the fully unfolded state between two adjacent narrow portions 4 to 3-6 times the width of the narrow portion 4, so that the fan surface 4 has a sufficient fan area regardless of whether it is opened in the front or back. At the same time, this invention divides the fan blade 1 into a wide portion 3 and a narrow portion 4. The gap between the narrow portions 4 is relatively large, so by connecting them with the fan surface 5, the wide portions 3 partially overlap, reducing the hollow area and ensuring the fan's fanning effect.

[0025] like Figure 3 , 4 As shown, when the fan is opened to the left in reverse, the fan surface between adjacent fan blades 1 will pass through the first crease 8 to the left and around the left fan blade 1. At the same time, it will also pass through the first crease 8 to the left and around the right fan blade. Since the width b of the narrowest part is 3-6 times the width of the narrow part 4 of the fan blade 1, a part of the fan surface between adjacent fan blades 1 will unfold between the two adjacent narrow parts 4, thereby increasing the unfolding area of ​​the fan in the counterclockwise direction, so that the fan can be opened and used in both directions.

Claims

1. A fan that can be opened in both directions, comprising multiple stacked fan blades, the tail ends of which are rotatably connected by a pin, characterized in that: The fan blades include a wide section at the bottom and a narrow section at the top, with a fan-shaped fan surface connecting the narrow sections. When the fan surface between adjacent fan blades is fully extended to the right, the width of the narrowest part is 3-6 times the width of the narrow section of the fan blade, and the length of the narrow section is 1 / 4-1 / 3 of the length of the wide section. The fan blades have ventilation holes on their wide portion; the narrow portion is located to the left of the wide portion, and the left side of the narrow portion is flush with the left side of the upper end of the wide portion. On the fan surfaces of all fan blades except the top and bottom ones, on the fan surface on both sides, on the fan surface on the right side of the bottom fan blade, and on the fan surface on the left side of the top fan blade, two first creases are provided respectively. The distance between the two first creases is the same as the thickness of the corresponding fan blade, and the first crease closer to the corresponding fan blade is flush with the corresponding side edge of the corresponding fan blade. A fourth crease is provided in the middle of the fan surface between the narrow portions of adjacent fan blades.

2. A fan that can be opened in both directions according to claim 1, characterized in that: The right side of the fan blade has an outwardly protruding arc-shaped protrusion that partially or completely overlaps with the adjacent fan blade when the fan is opened to the right.

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