Electric fan

Abstract

To provide an electric fan capable of suppressing the rattling of a blowing part during right-and left oscillating operations of the blowing part.SOLUTION: An electric fan includes a blowing head having a rear impeller and a front impeller, a motor M having a motor shaft M2 and a motor body M1 for driving the motor shaft M2 to be rotated around the axis, a holding part for supporting the blowing head and holding the motor body M1, and an installation part 50 journaling the motor shaft M2 and installed on the installation surface. The holding part is rotated around the axis of the motor shaft M2 relatively to the installation surface 50 with the motor shaft M2 rotated in the state that the installation part 50 is installed on the installation surface. The holding part has a front end protruded part 84c1 to be put in slide contact on the installation part 50 with the rotation of the motor shaft M2.SELECTED DRAWING: Figure 5

Description

Technical Field

[0001] The present invention relates to a fan.

Background Art

[0002] Conventionally, a fan having a mechanism for swinging left and right has been known. For example, Patent Document 1 discloses a fan including a blower support having a base portion and a blower portion, and provided with a left and right swinging mechanism having a motor as a drive source. In this fan, a support frame for supporting the blower portion is connected to the upper end of a column standing from the center of the base portion via a left and right swinging mechanism.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] By the way, in a fan provided with a left and right swinging mechanism having a motor as a drive source as disclosed in Patent Document 1 above, the rotating shaft of the motor is supported by a screw or the like with respect to the base portion, and the blower portion may be configured to swing left and right with respect to the base portion together with the motor as the rotating shaft rotates. In this case, since only the rotating shaft of the motor is supported with respect to the base portion, play may occur in the blower portion that rotates together with the motor due to the vibration of the motor generated during the rotation of the rotating shaft.

[0005] The present invention has been created in view of the above problems, and an object thereof is to provide a fan capable of suppressing play in the blower portion during the left and right swinging operation of the blower portion.

Means for Solving the Problems

[0006] The blower of the present invention includes a blowing unit having an impeller, a drive mechanism having a rotating shaft and a drive unit that rotationally drives the rotating shaft around its axis, a holding unit that supports the blowing unit and holds the drive unit, and an installation unit that pivotally supports the rotating shaft and is installed on an installation surface. The holding unit rotates relative to the installation unit around the axis of the rotating shaft when the rotating shaft is rotated with the installation unit installed on the installation surface, and the holding unit has a sliding contact portion that is slidably contacted with the installation surface as the rotating shaft rotates.

Advantages of the Invention

[0007] According to the present invention, it is possible to provide a blower that can suppress the rattling of the blowing unit during the swinging operation of the blowing unit to the left and right.

Brief Description of the Drawings

[0008]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Figure 8

Embodiments for Carrying Out the Invention

[0009] Embodiments of the present invention will be described with reference to the drawings. As shown in FIGS. 1 and 2, the fan 1 according to the present embodiment is a small desktop fan 1, which is a double-reverse type, and includes a main body 10 and a blower head 20 provided above the main body 10. On the front side of the main body 10, a control knob 12 is provided for the user to control the on / off of the power of the fan 1, the blowing speed of the blower head 20, the presence or absence of head swing in the left-right direction, etc. With the fan 1, the user can cause air to be blown from the blower head 20 by operating the control knob 12. Hereinafter, the side where the control knob 12 of the main body 10 is provided (the downstream side of the air flow path) is defined as the front side of the fan 1, the opposite side is defined as the rear side, and the right side and the left side when the main body 10 is viewed from the front side are defined as the right side and the left side of the fan 1, respectively, and will be described.

[0010] First, the configuration of the blower head 20 will be described. As shown in FIGS. 1 and 2, the blower head 20 includes a rear cover 21 provided on the rear side, that is, the upstream side of the air flow path, a front cover 22 provided on the front side, that is, the downstream side of the air flow path, a cover mounting member 30 provided between the rear cover 21 and the front cover 22, a rear impeller (impeller) 25 attached to the rear side of the cover mounting member 30, and a front impeller (impeller) 26 attached to the front side of the cover mounting member 30. That is, the cover mounting member 30 is provided between the two impellers 25 and 26. The cover mounting member 30 has a rear mounting member 31 constituting the rear portion and a front mounting member 32 constituting the front portion, and the lower end portion is connected to the main body 10.

[0011] The rear cover 21 has a substantially short cylindrical shape with a slightly reduced diameter at the rear and a bottom, and is attached to the cover attachment member 30 so as to cover the rear impeller 25. The rear cover 21 has a grille shape formed of a beam-like portion as a whole, and includes a rear first grille portion 21a that constitutes an annular side surface, and a rear second grille portion 21b that is provided inside the rear first grille portion 21a and constitutes a bottom surface. The front cover 22 has a substantially short cylindrical shape with a bottom at the front, and is attached to the cover attachment member 30 so as to cover the front impeller 26. The front cover 22 includes a side surface portion 22a that constitutes an annular side surface, and a grille-shaped front grille portion 22b that is provided inside the side surface portion 22a and constitutes a bottom surface.

[0012] Next, the configuration of the main body 10 will be described in detail. The main body 10 has a non-rotating portion 14 provided at the lower end, and a rotating portion 16 provided above the non-rotating portion 14 and rotating around a motor shaft M2 (see FIG. 5) described later with the vertical direction as the axial direction with respect to the non-rotating portion 14. As shown in FIG. 4, the rotating portion 16 has a configuration in which each member is accommodated inside a substantially cylindrical outer case 40 that constitutes an outer surface. Further, as shown in FIG. 3, an arc-shaped concave portion 40a that is recessed downward in an arc shape is provided on the upper surface of the outer case 40, and a plurality of first openings 40a1 that open in a slit shape in the vertical direction are provided in the arc-shaped concave portion 40a.

[0013] The lower end of the blower head 20 is supported in the first opening 40a1 so as to be able to swing vertically with respect to the main body 10. The blower head 20 rotates together with the rotating portion 16. In the fan 1, when the blower head 20 rotates around the motor shaft M2 together with the rotating portion 16, a swinging operation to the left and right is executed. Specifically, as shown in FIG. 2, the rotating portion 16 and the blower head 20 can perform a swinging operation in the clockwise direction DR and a swinging operation in the counterclockwise direction DL with respect to the front direction.

[0014] As shown in Fig. 4, the non-rotating part 14 is provided with an installation part 50 installed on a table or the like. The installation part 50 is a substantially circular shallow dish-shaped member opened upward, and a first convex part 51 protruding substantially cylindrically upward is provided at the inner central part. At the center of the upper surface of the first convex part 51, a second convex part 52 having a smaller diameter than the first convex part 51 and protruding substantially cylindrically upward is provided. At the center of the upper surface of the second convex part 52, a third convex part 53 having a smaller diameter than the second convex part 52 and protruding substantially cylindrically upward is provided. Note that installation sheets 56 formed of a material such as rubber and directly contacting the installation surface are provided at three locations on the peripheral edge of the lower surface of the installation part 50 at equal intervals (see Fig. 7).

[0015] As shown in Figs. 4, 5, and 7, the installation part 50 has a sheet member 60. The sheet member 60 is placed on a sheet placement part 51a provided in an annular part around the second convex part 52 on the upper surface of the first convex part 51. The lower surface of the first convex part 51 is a first recessed part 51b recessed in a shape corresponding to the convex shape of the first convex part 51. At two locations on the peripheral surface of the second convex part 52 (specifically, at two locations on both sides sandwiching the second convex part 52), minute convex parts 52a protruding slightly convexly outward in the radial direction are respectively provided. The lower surface of the second convex part 52 is a second recessed part 52b recessed in a shape corresponding to the convex shape of the second convex part 52.

[0016] The third convex part 53 is formed in a substantially cylindrical shape with a hollow inside, and the inner space is a shaft insertion part 53a through which the motor shaft M2 is inserted. The shaft insertion part 53a is provided in a shape penetrating the installation part 50 in the vertical direction, and opens in a substantially I shape when viewed in plan (see Fig. 7). The outer diameter of the installation part 50 is made slightly smaller than the outer diameter of the outer case 40, and its outer edge part is provided below the rotating part 16 in a shape surrounded by the inside of the outer case 40 (see Fig. 5).

[0017] The sheet member 60 disposed in the sheet placement portion 51a is a substantially annular flexible sheet-like member, and is formed of a material such as polyoxymethylene (POM). Examples of the material of the sheet member 60 other than polyoxymethylene include soft resins such as polypropylene (PP), polyethylene sulfide (PPS), and polybutylene terephthalate (PBT). The sheet member 60 is placed on the sheet placement portion 51a by inserting the second convex portion 52 through a sheet opening 62 which is a substantially circular opening provided on the inner side. At two opposing locations of the opening end of the sheet opening 62, there are provided minute notch portions 62a which are slightly notched in a shape corresponding to the minute convex portions 52a of the second convex portion 52. The sheet member 60 is placed on the sheet placement portion 51a in a state where each minute convex portion 52a is engaged with each minute notch portion 62a, whereby the sheet member 60 is held on the sheet placement portion 51a in a non-rotatable manner around the second convex portion 52.

[0018] Next, the configuration of each member housed inside the outer case 40 in the rotating portion 16 will be described. As shown in FIGS. 4 and 5, in the space inside the outer case 40, a control board 70, a motor (drive mechanism) M, and a holding portion 80 for holding the motor M are provided. The front portion of the above-described control knob 12 is exposed to the outside through a second opening 40b provided on the front side of the outer case 40. The rear portion of the control knob 12 is connected to the control board 70. The control board 70 is disposed in the front portion inside the outer case 40 with both of its board surfaces facing in the front-rear direction. The control board 70 controls and coordinates the operation of the blower 1 based on the operation of the control knob 12.

[0019] The motor M has a motor body (drive portion) M1 having a substantially rectangular parallelepiped shape, and a motor shaft (rotation shaft) M2 extending downward in a substantially cylindrical shape from the front portion of the motor body M1. The motor shaft M2 extends along the vertical direction from the lower surface of the motor body M1, and is rotationally driven around the axis with respect to the motor body M1 by the motor body M1. In other words, when the motor shaft M2 is fixed, the motor body M1 rotates around the axis of the motor shaft M2 when the motor body M1 is driven.

[0020] On both sides of the tip of the motor shaft M2, notch surfaces M2a are respectively provided, whereby the cross-section of the tip of the motor shaft M2 is substantially I-shaped. Specifically, the cross-section of the tip of the motor shaft M2 is shaped and sized to fit into the shaft insertion portion 53a of the installation portion 50 with substantially no gap. Further, a screw groove M2b that opens downward is provided at the tip of the motor shaft M2 (see FIG. 5). The motor shaft M2 is attached and pivotally supported to the installation portion 50 by screwing a screw member S into the screw groove M2b via a washer W in a state where it is inserted through the shaft insertion portion 53a.

[0021] The holding portion 80 has an upper holding plate (first holding portion) 82 and a lower holding plate (second holding portion) 84 that are arranged above and below the motor M so as to sandwich the motor M. The upper holding plate 82 and the lower holding plate 84 are provided in parallel at intervals in the vertical direction with both plate surfaces facing in the vertical direction. The control board 70 described above is arranged in the front portion (the front portion of the motor M) between the upper holding plate 82 and the lower holding plate 84. The upper holding plate 82 has a substantially disk shape, and on its lower surface, a motor attachment portion 82a to which the motor body M1 is attached and a board attachment portion 82b to which the control board 70 and the control knob 12 are attached are provided. The motor M, the control board 70, and the control knob 12 are held by the upper holding plate 82 by being attached to the motor attachment portion 82a and the board attachment portion 82b.

[0022] Further, at three locations on the peripheral edge of the lower surface of the upper holding plate 82, connection support columns 82c that extend downward in a substantially columnar shape are respectively provided (only one connection support column 82c is shown in FIG. 4). The lower end portions of the respective connection support columns 82c are connected to the lower holding plate 84. On the other hand, on the left and right sides near the center of the upper surface of the upper holding plate 82, arc-shaped support portions 82d that protrude in a rib shape are respectively provided. Each arc-shaped support portion 82d is provided so as to form a concave arc shape downward. Each arc-shaped support portion 82d is exposed upward from the first opening 40a1 of the outer case 40 in a state where the upper holding plate 82 is housed in the outer case 40.

[0023] Here, the lower end portion (not shown) of the cover attachment member 30 in the blower head 20 is provided in a convex arc shape facing downward, and the arc-shaped support portion 82d is provided in a concave arc shape along the lower end portion of the cover attachment member 30. And, the lower end portion of the cover attachment member 30 is inserted through the first opening 40a1 in a state where the upper holding plate 82 is housed in the outer case 40, and is slidably supported along the arc-shaped support portion 82d on each arc-shaped support portion 82d. By sliding the lower end portion of the cover attachment member 30 on the arc-shaped support portion 82d, the blower head 20 can be swung up and down with respect to the main body portion 10.

[0024] As shown in FIG. 4, the lower holding plate 84 has a substantially disc shape, and a substantially circular through hole 84a is provided in the central portion thereof. The through hole 84a has an opening diameter that is slightly larger than the outer diameter of the motor shaft M2, and the motor shaft M2 is inserted therethrough. Short cylindrical connected portions 84b are provided at positions corresponding in the vertical direction to the respective connection support columns 82c provided on the upper holding plate 82 on the upper surface of the lower holding plate 84. The upper portion of each connected portion 84b is configured such that the lower end portion of the connection support column 82c is fitted therein. By fitting the lower end portion of each connection support column 82c into each connected portion 84b, the upper holding plate 82 and the lower holding plate 84 are connected with a space therebetween in the vertical direction.

[0025] As shown in FIGS. 5 and 6, a circular rib (hereinafter referred to as "circular rib 84c") protruding downward in a rib shape is provided around the through hole 84a on the lower surface of the lower holding plate 84. The circular rib 84c has a diameter slightly smaller than the diameter of the sheet member 60 and is provided concentrically with the through hole 84a. In a state where the motor body M1 is held by the holding portion 80, the circular rib 84c is provided around the motor shaft M2. The tip portion of the circular rib 84c is a tip protruding portion (sliding contact portion) 84c1 that protrudes downward in a small rib shape. A switch attachment portion 84d to which a limit switch 86 (see FIG. 4) is attached is provided on a part of the lower surface of the lower holding plate 84. The limit switch 86 detects that the rotation angle of the rotating portion 16 has reached the maximum by physical contact and controls the rotation to be switched in the reverse direction.

[0026] As shown in FIG. 5, the motor M, the control board 70, and the control knob 12 are held by the upper holding plate 82. After the upper holding plate 82 and the lower holding plate 84 are connected, these members are housed inside the outer case 40, whereby each member constituting the rotating part 16 is assembled. In this state, the motor shaft M2 is inserted through the through-hole 84a and extends below the through-hole 84a, exposing below the outer case 40. Also, a slight gap G is provided between the motor body M1 and the lower holding plate 84. Therefore, when the motor body M1 is driven, the vibration of the motor body M1 is difficult to be transmitted to the lower holding plate 84.

[0027] Next, the assembling mode of the rotating part 16 and the non-rotating part 14 in the main body part 10 will be described. In a state where each member (control board 70, motor M, holding part 80, outer case 40) constituting the rotating part 16 is assembled, the motor shaft M2 of the motor M protrudes below the through-hole 84a. On the other hand, in a state where the installation part 50 and the seat member 60 constituting the non-rotating part 14 are assembled, the shaft insertion part 53a of the installation part 50 protrudes above the seat opening 62. The rotating part 16 and the non-rotating part 14 are assembled by inserting the motor shaft M2 into the shaft insertion part 53a.

[0028] As shown in FIG. 5, the tip of the motor shaft M2 inserted into the shaft insertion part 53a reaches the second recessed part 52b. Then, by screwing the screw member S to the screw groove M2b via the washer W, the washer W is sandwiched between the screw head of the screw member S and the second recessed part 52b, and the motor shaft M2 is fixed to the installation part 50 (shaft insertion part 53a). Thereby, the rotating part 16 and the non-rotating part 14 are connected. By connecting the rotating part 16 and the non-rotating part 14, the seat member 60 faces the circular rib 84c of the lower holding plate 84 in the vertical direction, and the tip protruding part 84c1 abuts against the outer peripheral edge part of the seat member 60 (see FIG. 8).

[0029] Next, the rotation mode of the rotating part 16 with respect to the non-rotating part 14 will be described. In the main body part 10 configured by connecting the rotating part 16 and the non-rotating part 14 as described above, when the motor M is driven with the installation part 50 installed on the installation surface, along with the rotation of the motor shaft M2, the entire rotating part 16 where the motor main body M1 and the motor main body M1 are held rotates relative to the non-rotating part 14 around the axis of the motor shaft M2. When the rotating part 16 rotates around the axis of the motor shaft M2, the blower head 20 connected to the rotating part 16 rotates around the axis of the motor shaft M2 together with the rotating part 16, and the left-right swinging operation of the fan 1 is performed.

[0030] As described above, the shaft insertion part 53a has substantially an I-shaped cross-section similar to the tip of the motor shaft M2, and the motor shaft M2 is fixed to the installation part 50 (shaft insertion part 53a) with the tip of the motor shaft M2 fitted into the shaft insertion part 53a with almost no gap. Therefore, when the rotating part 16 rotates, the rotating part 16 does not idle relative to the non-rotating part 14.

[0031] As shown in FIG. 8, in the fan 1 of the present embodiment, when the rotating part 16 rotates around the axis of the motor shaft M2, along with the rotation of the lower holding plate 84 of the rotating part 16, the tip protruding part 84c1 is in sliding contact with the outer peripheral edge of the sheet member 60. For this reason, the rotating part 16 rotates not only supported by the motor shaft M2 with respect to the non-rotating part 14 but also supported by the tip protruding part 84c1 of the circular rib 84c provided around the motor shaft M2. As a result, when the rotating part 16 rotates, rattling of the rotating part 16 around the axis of the motor shaft M2 is suppressed. That is, in the fan 1 of the present embodiment, when the blower head 20 swings left and right, rattling of the blower head 20 is suppressed, and a smooth swinging operation is performed.

[0032] Since the tip protruding part 84c1 of the circular rib 84c extending downward from the lower holding plate 84 contacts the sheet member 60, by changing the height dimension of the circular rib 84c, the height position where the lower holding plate 84 is arranged can be adjusted. For this reason, by changing the height dimension of the circular rib 84c, the height dimension of the rotating part 16 can be changed.

[0033] As described above, the fan 1 according to the present embodiment includes a blower head 20 having a rear impeller 25 and a front impeller 26, a motor M having a motor shaft M2 and a motor body M1 that rotationally drives the motor shaft M2 around its axis, a holding portion 80 that supports the blower head 20 and holds the motor body M1, and an installation portion 50 that pivotally supports the motor shaft M2 and is installed on an installation surface. The holding portion 80 rotates relative to the installation portion 50 around the axis of the motor shaft M2 when the motor shaft M2 is rotated with the installation portion 50 installed on the installation surface, and the holding portion 80 has a tip protruding portion 84c1 that is slidably contacted with the installation portion 50 as the motor shaft M2 rotates.

[0034] According to the fan 1 of the present embodiment configured as described above, when the motor body M1 is driven and the motor shaft M2 rotates, the blower head 20 together with the holding portion 80 rotates relative to the installation portion 50 around the axis of the motor shaft M2, and a swaying operation to the left and right is performed. At this time, as the motor shaft M2 rotates, the tip protruding portion 84c1 of the holding portion 80 is slidably contacted with a seat member 60 provided on the installation portion 50. Therefore, when the motor shaft M2 rotates, the holding portion 80 is supported by the installation portion 50 not only at the motor shaft M2 but also at the tip protruding portion 84c1. For this reason, in the fan 1, it is possible to suppress rattling of the holding portion 80 and the blower head 20 supported by the holding portion 80 around the axis of the motor shaft M2 when the motor shaft M2 rotates, that is, during the swaying operation to the left and right.

[0035] Further, in the fan 1 of the present embodiment, the installation portion 50 has a sheet-shaped seat member 60 provided so as to face the holding portion 80, and the tip protruding portion 84c1 is slidably contacted with the seat member 60 as the motor shaft M2 rotates. According to this configuration, when the tip protruding portion 84c1 is slidably contacted with the seat member 60, play in the holding portion 80 is absorbed by the seat member 60, so that play in the holding portion 80 and the blower head 20 during rotation of the motor shaft M2 can be effectively suppressed.

[0036] In addition, in the fan 1 of the present embodiment, the tip protruding portion 84c1 has a rib-shaped protrusion toward the sheet member 60. According to this configuration, while enhancing the strength of the holding portion 80 by the tip protruding portion 84c1, when the motor shaft M2 rotates, the holding portion 80 can be effectively supported by the tip protruding portion 84c1 with respect to the installation portion 50.

[0037] In addition, in the fan 1 of the present embodiment, the sheet member 60 has a substantially circular shape, and the tip protruding portion 84c1 is provided in a substantially circular shape along the sheet member 60. According to this configuration, when the motor shaft M2 rotates, the holding portion 80 is supported by the substantially circular tip protruding portion 84c1 around the motor shaft M2 with respect to the installation portion 50. Therefore, it is possible to effectively suppress the play of the holding portion 80 and the blower head 20 when the motor shaft M2 rotates.

[0038] In addition, in the fan 1 of the present embodiment, the holding portion 80 includes an upper holding plate 82 that supports the blower head 20 and holds the motor body M1, and a lower holding plate 84 that is connected to the upper holding plate 82 and is provided at a distance from the motor body M1 and has the tip protruding portion 84c1. According to this configuration, since the vibration of the motor body M1 is less likely to be transmitted to the lower holding plate 84 and the tip protruding portion 84c1 when the motor body M1 is driven, it is possible to effectively suppress the play of the holding portion 80 and the blower head 20 when the motor shaft M2 rotates.

[0039] In addition, in the fan 1 of the present embodiment, the material of the sheet member 60 is polyoxymethylene. According to this configuration, since polyoxymethylene is a soft resin with good slipperiness, the tip protruding portion 84c1 smoothly slides on the sheet member 60. Therefore, it is possible to more effectively suppress the play of the holding portion 80 and the blower head 20 when the motor shaft M2 rotates.

[0040] Note that the embodiments described above are presented as examples and are not intended to limit the scope of the invention. These novel embodiments can be implemented in various other forms, and various omissions, replacements, and changes can be made without departing from the spirit of the invention. These embodiments and their modifications are included in the scope and gist of the invention, and are included in the invention described in the claims and the equivalent scope thereof.

Explanation of Reference Numerals

[0041] 1 Fan 10 Main body 12 Control knob 14 Non-rotating part 16 Rotating part 20 Air blowing head 21 Rear cover 21a Rear first grill part 21b Rear second grill part 22 Front cover 22a Side surface part 22b Front grill part 25 Rear impeller 26 Front impeller 30 Cover mounting member 31 Rear mounting member 32 Front mounting member 40 External case 40a Arc-shaped recess 40a1 First opening 40b Second opening 50 Installation part 51 First convex part 51a Seat arrangement part 51b First recess 52 Second convex part 52a Micro convex part 52b Second recess 53 Third convex part 53a Shaft insertion part 56 Installation sheet 60 Sheet member 62 Sheet opening 62a Micro notch 70 Control board 80 Holding part 82 Upper holding plate 82a Motor mounting part 82b Board mounting part 82c Connection support part 82d Arc-shaped support part 84 Lower holding plate 84a Through hole 84b Connected part 84c Circular rib 84c1 Tip protruding part 84d Switch mounting part 86 Limit switch DL Counterclockwise direction DR Clockwise direction G Gap M Motor M1 Motor body M2 Motor shaft M2a Notch surface M2b Thread groove S Screw member W Washer

Claims

1. A blower unit having an impeller; A drive mechanism having a rotating shaft and a drive unit that rotationally drives the rotating shaft about its axis; A holding unit that supports the blower unit and holds the drive unit; An installation unit that pivotally supports the rotating shaft and is installed on an installation surface, and comprising: In a state where the installation unit is installed on the installation surface, when the rotating shaft is rotated, the holding unit rotates relative to the installation unit about the axis of the rotating shaft; The holding unit has a sliding contact portion that is slidably contacted with the installation unit as the rotating shaft rotates; A fan.

2. The installation unit has a sheet-like sheet member provided so as to face the holding unit; The sliding contact portion is slidably contacted with the sheet member as the rotating shaft rotates; The fan according to Claim 1.

3. The sliding contact portion has a shape that protrudes in a rib shape toward the sheet member; The fan according to Claim 2.

4. The sheet member is substantially circular; The sliding contact portion is provided in a substantially circular shape along the sheet member; The fan according to Claim 3.

5. The holding unit has a first holding unit that supports the blower unit and holds the drive unit, and a second holding unit that is connected to the first holding unit, is provided at a distance from the drive unit, and has the sliding contact portion; The fan according to Claim 2.

6. The material of the sheet member is polyoxymethylene; The fan according to any one of Claims 2 to 5.

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