JP2020076555A - Ventilation fan and fixing member - Google Patents

Abstract

To solve a problem that restriction to a ventilation fan body by a hook of a fixing member for attaching a guard to the ventilation fan body is weakened when the hook is deformed, and as a result, the fixing member is rotated and comes out of the ventilation fan body, and fixing of the guard and the ventilation fan becomes insufficient.SOLUTION: In a ventilation fan 100, a guard 20 is fixed to a ventilation fan body 10 by a fixing member which includes a first abutment portion 31 abutted to a frame body 11 side of an attachment leg 13 installed on the ventilation fan body 10, a second abutment portion 34 and a third abutment portion 35 abutted to a guard 20 so as to draw the guard 20 to the frame body 11 side, a first connecting portion 32 connecting the first abutment portion 31 and the second abutment portion 34, and a second connecting portion 33 connecting the first abutment portion 31 and the third abutment portion 35 and arranged to hold the attachment leg 13 with the first connecting portion 32.SELECTED DRAWING: Figure 7

Description

  The present invention relates to a ventilation fan having a guard fixed to a ventilation fan body and a fixing member for fixing the guard to the ventilation fan body.

  There is a conventional ventilation fan that uses a fixing member formed by bending a linear wire in order to fix a guard covering the fan to the ventilation fan body (for example, Patent Document 1 below). The fixing member of the ventilation fan has a hook fixed to the ventilation fan main body at one end and a contact portion fixed to the guard at the other end. Then, when the contact portion comes into contact with the guard in a state where the contact portion is elastically deformed in the direction away from the hook, a restoring force that causes the fixing member to return in the direction in which the hook and the contact portion approach each other is generated. As a result, a force is applied in the direction in which the guard approaches the main body of the ventilation fan, and the guard is fixed to the main body of the ventilation fan.

JP, 2013-204920, A

In the elastically deformable fixing member as described above, the hook fixed to the ventilation fan main body is deformed due to the vibration generated in the ventilation fan main body. When the hook is deformed, the hook is less constrained to the ventilation fan body. As a result, the fixing member rotates around the contact portion and comes off from the ventilation fan main body, and there is a problem that the guard and the ventilation fan are not fixed sufficiently.
The present invention is for solving the above problems, and an object of the present invention is to provide a ventilation fan and a fixing member using a fixing member that can be prevented from coming off from the ventilation fan main body.

  A ventilation fan according to the present invention is a ventilation fan main body including a fan, a frame body, and mounting feet for mounting the fan on the frame body, and is arranged so that one surface thereof faces the fan and the frame body. Of the mounting foot, a first contact portion that contacts the frame side of the mounting foot, a second contact portion and a third contact portion that contact the guard so as to pull the guard toward the frame body, The first contact portion that connects the first contact portion and the second contact portion, and the first contact portion and the third contact portion that are connected to each other are arranged so as to sandwich the mounting foot. And a second connecting portion, the second contact portion and the third contact portion are elastically deformed in a direction away from the first contact portion, and contact the guard, and fix the guard to the ventilation fan main body. And, it is equipped with.

  A fixing member according to the present invention attracts a first contact portion, which is a rod-shaped member that abuts an attachment foot for attaching a fan to a frame body of a ventilation fan main body, and a guard covering at least a part of the fan and the attachment foot to the frame body. The second contact portion and the third contact portion, which are rod-shaped members that contact the guard, and the first connection portion that is a rod-shaped member that connects the first contact portion and the second contact portion, A second connecting portion which is a rod-shaped member that connects the first contact portion and the third contact portion, and is arranged so as to sandwich the mounting foot between the first contact portion and the second contact portion. The portion and the third contact portion are elastically deformed in the direction away from the first contact portion.

  According to the present invention, since the first connecting portion and the second connecting portion are arranged so as to sandwich the mounting foot, the fixing member can be prevented from coming off the ventilation fan main body.

It is a front view of the ventilation fan concerning Embodiment 1 of the present invention. It is a side view of the ventilation fan concerning Embodiment 1 of the present invention. It is a front view of the ventilation fan main body according to Embodiment 1 of the present invention. It is a side view of the ventilation fan main body according to Embodiment 1 of the present invention. It is a perspective view of the guard concerning Embodiment 1 of the present invention. FIG. 3 is a perspective view of a fixing member according to Embodiment 1 of the present invention. It is a figure which shows the state which attached the fixing member which concerns on Embodiment 1 of this invention to the ventilation fan main body and the guard. It is a figure which shows the state which attached the fixing member which concerns on Embodiment 1 of this invention to the ventilation fan main body and the guard. It is a perspective view of the fixing member which concerns on Embodiment 2 of this invention. It is a figure which shows the state which attached the fixing member which concerns on Embodiment 2 of this invention to the ventilation fan main body and the guard. It is a side view which shows the modification of the guard which concerns on Embodiment 1 and 2 of this invention. It is a side view which shows the modification of the guard which concerns on Embodiment 1 and 2 of this invention.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. The same reference numerals in the drawings represent the same or corresponding parts.

Embodiment 1
The fixing member 30 that constitutes the ventilation fan 100 according to Embodiment 1 of the present invention includes the second contact portion 34 and the third contact portion 35 that contact the guard 20 and the first contact portion 31 that contacts the ventilation fan body 10. The first connecting portion 32 and the second connecting portion 33 that connect to and are arranged so as to sandwich the mounting foot 13 of the ventilation fan body 10 (FIG. 7). Therefore, even if the mounting foot 13 tries to come off from the fixing member 30, the mounting foot 13 comes into contact with the first connecting portion 32 or the second connecting portion 33, and the fixing member 30 is prevented from coming off from the mounting foot 13. it can.

The ventilation fan 100 according to the first embodiment of the present invention described above includes the ventilation fan main body 10, the guard 20, and the fixing member 30, and the ventilation fan 100 in a state in which these configurations are assembled is shown in FIGS. It is shown.
The ventilation fan main body 10 rotates the rotary blades 16 to generate an air flow, and is fixed to a wall surface of a building or the like. In FIG. 1, the back side is the wall surface and the front side is the inside of the building. In FIG. 2, the right side of the figure is the wall surface, and the left side is the inside of the building.
The guard 20 is for preventing foreign matter from coming into contact with the rotary blade 16, and is fixed to the ventilation fan main body 10 so as to cover the rotary blade 16.
The ventilation fan body 10 and the guard 20 are fixed by four fixing members 30 (FIG. 1). The fixing member 30 contacts the ventilation fan main body 10 and the guard 20, and fixes the guard 20 by sandwiching them.
For convenience of description, the side of the ventilation fan body 10 to which the guard 20 is fixed is referred to as the front surface of the ventilation fan body 10 and the members constituting the ventilation fan body 10, and the opposite side (that is, the side fixed to the wall surface) is referred to as the back surface. The side of the guard 20 facing the ventilation fan body 10 is called the back side of the guard 20 and the members constituting the guard 20, and the opposite side is called the front side.

Next, each structure of the ventilation fan main body 10, the guard 20, and the fixing member 30 that configure the ventilation fan 100 will be sequentially described with reference to FIGS. 3 to 7.
The ventilation fan main body 10 includes a frame body 11, mounting feet 13, a motor fixing base 14, a motor 15, and a rotary blade 16.
The frame 11 forming the ventilation fan main body 10 is a quadrangular member for fixing the ventilation fan main body 10 to a wall surface of a building or the like. A through hole is formed in the center of the frame body 11, and this through hole is an air flow path connecting the inside and outside of the building. Bolts (not shown) are installed around the through holes of the frame body 11, and the bolts are inserted into the openings provided in the wall surface to fix the frame body 11 to the wall surface.
Further, a flange 12 extending toward the guard 20 side is provided on the front surface of the frame body 11 so as to surround the through hole. The flange 12 has a function of preventing the wind generated when the rotary blades 16 rotate from leaking laterally and improving the blowing performance.

On the front surface of the frame body 11, mounting feet 13 for mounting the motor 15 and the rotary blade 16 on the front surface side of the frame body 11 are provided.
The mounting foot 13 is a U-shaped member formed by bending a flat plate, and two ends thereof are fixed around two adjacent corners of the frame body 11. The mounting foot 13 extends from the two ends in a direction away from the front surface of the frame body 11 (that is, a direction in which the guard 20 is arranged) (FIG. 3), and then bends toward the central axis direction of the through hole. It has two rising portions extending substantially parallel to the front surface of the frame body (FIGS. 3 and 4). Further, the two rising portions are connected by a straight portion before reaching the central axis of the through hole (FIG. 3). That is, the portion corresponding to the bottom of the U-shape is arranged in front of the through hole.
The mounting legs 13 having the same structure are also fixed around the other two corners of the frame body 11, and the linear portions of the mounting legs 13 are arranged so as to face each other (Fig. 3).

The motor fixing base 14 is fixed so as to be sandwiched between the straight portions of the two mounting feet 13. The motor fixing base 14 is a quadrangular member for fixing the motor 15, and a through hole into which the motor 15 is inserted and fixed is formed in the center thereof.
The motor 15 is fixed to the through hole of the motor fixing base 14, the shaft of the motor 15 extends in the direction toward the through hole of the frame 11, and the central axis of the through hole of the frame 11 and the penetrating of the motor fixing base 14. It is arranged so as to substantially coincide with the central axis of the hole.
The rotor 16 is fixed to the shaft of the motor 15. That is, the rotary blade 16 is attached to the attachment leg 13 via the motor 15 and the motor fixing base 14. The rotary blade 16 is composed of three blades, and is rotated by driving the motor 15.
The motor 15 and the rotary blades 16 are collectively called a fan.

Next, the guard 20 that constitutes the ventilation fan 100 will be described with reference to FIG.
The guard 20 has a cup-like shape composed of a circular flat surface portion 21 and a side wall portion 22 rising from the flat surface portion 21, and the concave surface of the cup, which is one surface, is the frame body 11 and the rotation. It is a back surface arranged so as to face the wing 16.
The plane portion 21 of the guard 20 is formed by a plurality of wire rods 23 extending in the radial direction of the plane portion 21, and the wire rod 23 extends in the radial direction and then bends to form a side wall portion 22. Further, on the plane portion 21 of the guard 20, two ring-shaped wire rods 24 having different circumferential lengths intersect the radial wire rods 23 and are fixed at the intersections. Also in the side wall portion 22, two ring-shaped wire rods 25 having different circumferential lengths intersect the radial wire rods 23 and are fixed at the intersections.

The two ring-shaped wire rods 25 arranged on the side wall portion 22 are cut at four locations, and an open portion 26 is formed at the cut locations. The open portion 26 is a space through which the mounting feet 13 pass when the ventilation fan main body 10 is covered with the guard 20.
The two radial wire rods 23 extending laterally to the cut portion of the ring-shaped wire rod 25 are fixed to the linear wire rods 27a on the top side of the cup with respect to the cut portion. This wire rod 27a suppresses the reduction in strength of the guard 20 due to the cutting of the ring-shaped wire rod 25, and contacts the mounting foot 13 when the guard 20 is covered with the ventilation fan main body 10 to position the guard 20. belongs to.

Further, one wire rod 23 of the radial wire rods 23 on the side of the open portion 26 is cut between the second ring-shaped wire rod 25 and the linear wire rod 27a from the outside, and the mounting foot 13 is It is possible to pass. A linear wire rod 27b is also fixed between the cut wire rod 23 and the radial wire rod 23 adjacent to the cut wire rod 23 and located on the inner side of the open portion 26. Like the linear wire 27a, the linear wire 27b is for suppressing a decrease in strength of the guard 20 and positioning the guard 20 in contact with the mounting foot 13. The linear wires 27a and 27b have different levels, and one of them is arranged closer to the top of the cup. The distance between the mounting foot 13 and the frame body 11 may differ depending on the model of the ventilation fan main body 10, but the guard 20 is compatible with a plurality of models because the wire rods 27a and 27b are staggered.
The wire rods are fixed by welding.

Next, the fixing member 30 that constitutes the ventilation fan 100 will be described with reference to FIG.
The fixing member 30 has one end in contact with the wire rod 27a or 27b of the guard 20 from the front side of the guard 20, and the other end in contact with the frame 11 side of the mounting foot 13 of the ventilation fan main body 10 to attach the guard 20 to the ventilation fan main body 10. The guard 20 and the ventilation fan body 10 are sandwiched so as to be attracted.
The fixing member 30 is formed by bending a rod-shaped wire, and includes a first contact portion 31, a first connection portion 32, a second connection portion 33, a second contact portion 34, and a third contact portion 35. I have it.

The first abutting portion 31 abuts on the frame body 11 side of the mounting foot 13 when attached to the ventilation fan main body 10, and has a linear fourth abutting portion 31a and a linear fifth abutting portion. 31b is provided. The axial directions of the fourth contact portion 31a and the fifth contact portion 31b are substantially parallel. The fourth contact portion 31a and the fifth contact portion 31b are connected by a linear wire extending in a direction intersecting the axial direction of the fourth contact portion 31a and the fifth contact portion 31b. A step 36 is formed between them. That is, the fourth contact portion 31a and the fifth contact portion 31b are not on the same axis, and when the fourth contact portion 31a is installed on the ventilation fan 100, the fourth contact portion 31a is closer to the frame 11 than the fifth contact portion 31b. It will be placed close to.
The axial length of the fourth contact portion 31a is longer than the diameter of the cross section of the mounting foot 13, and when the fourth contact portion 31a contacts the mounting foot 13, the fourth connecting portion 32a A gap is formed between the mounting foot 13 or the step 36 and the mounting foot 13. Also, the axial length of the fifth contact portion 31b is longer than the diameter of the cross section of the mounting foot 13, and when the fifth contact portion 31b contacts the mounting foot 13, the second connecting portion 33 and the mounting foot 13 13 or a gap is formed between the mounting foot 13 and the fifth contact portion 31b on the step 36 side.

The first connecting portion 32 is connected to an end portion of the end portion of the fourth contact portion 31a opposite to the side where the step 36 is provided. The first connecting portion 32 is a linear wire extending in a direction intersecting with the fourth contact portion 31a, and has a second contact with an end portion on the opposite side to the end portion connected to the fourth contact portion 31a. The part 34 is connected.
The second connecting portion 33 is connected to the end of the fifth contact portion 31b opposite to the side on which the step 36 is provided. The second connecting portion 33 is a linear wire member that extends in a direction intersecting with the fifth contact portion 31b, and has a third contact at the end opposite to the end connected to the fifth contact portion 31b. The part 35 is connected. The first connecting portion 32 and the second connecting portion 33 have substantially the same axial direction and extend in substantially the same direction.

The second contact part 34 connected to the first connection part 32 contacts the front side of the wire rod 27 a of the guard 20 when attached to the ventilation fan 100.
The second contact portion 34 extends in a direction intersecting the first connection portion 32, then bends toward the first contact portion 31 side, extends in a direction intersecting the first connection portion 32 again, and has a key-like tip. It is a bent member. The wire rod 27a of the guard 20 abuts on this key-shaped portion.
The third contact portion 35 connected to the second connection portion 33 also has the same configuration as the second contact portion 34.

Next, the attachment state of the fixing member 30 when the guard 20 is attached to the ventilation fan body 10 will be described. FIG. 7 is an enlarged view of a portion to which the fixing member 30 in FIGS. 1 and 2 is attached.
When the guard 20 is attached to the ventilation fan main body 10, the wire rod 27 a or 27 b of the guard 20 contacts the attachment leg 13, and the guard 20 is positioned on the ventilation fan main body 10. In the example of FIG. 7, a guard 20 is attached to the ventilation fan main body 10 of a model including a mounting leg 13 having a rectangular cross section, and the distance between the mounting leg 13 and the frame 11 is long, and the guard 20 is mounted on the top of the cup. The mounting foot 13 is in contact with the near wire 27b.
Of the first contact portion 31, the fifth contact portion 31b arranged at a position far from the frame 11 is in contact with the mounting foot 13 on the frame body 11 side. Further, in the guard 20, the second contact portion 34 contacts the front side of the wire 27a, and the third contact portion 35 contacts the front side of the wire 27b. The mounting foot 13 is sandwiched between the first connecting portion 32 and the second connecting portion 33.
The mounting foot 13 is covered by the guard 20 from the portion where the motor 15 is mounted to the portion where it abuts the wire 27b, but from the portion where it abuts the wire 27b to the end fixed to the frame 11. It projects from the guard 20.

In the example of FIG. 8, the ventilation fan main body 10 of a model including a mounting leg 13 having a circular cross section and a short distance between the mounting leg 13 and the frame 11 is mounted, and is far from the top of the cup of the guard 20. The mounting foot 13 is in contact with the wire 27a.
On the frame 11 side of the mounting foot 13, a fourth contact portion 31 a of the first contact portion 31 arranged at a position closer to the frame 11 is in contact. The other points are the same as in FIG. 7.

  7 and 8, the second contact portion 34 and the third contact portion 35 contact the wire rods 27a and 27b while being elastically deformed in a direction away from the first contact portion 31. ing. As a result, the wire rods 27a and 27b and the mounting foot 13 are strongly attracted by the restoring force of the second contact portion 34 and the third contact portion 35 to return toward the first contact portion 31 and the guard 20 Are fixed to the ventilation fan body 10.

The ventilation fan 100 and the fixing member 30 according to Embodiment 1 of the present invention are configured as described above, and have the following effects.
The fixing member 30 is arranged so as to sandwich the mounting foot 13 when mounted on the ventilation fan 100. Therefore, even if the mounting foot 13 tries to come off from the fixing member 30, the mounting foot 13 comes into contact with the first connecting portion 32 or the second connecting portion 33, and the fixing member 30 is prevented from coming off from the mounting foot 13. it can.

In addition, the fourth contact portion 31a and the fifth contact portion 31b of the fixing member 30 have an axial length longer than the diameter of the cross section of the mounting foot 13, and even if the mounting foot 13 contacts, the first connecting portion 31a. A gap is formed between the second connection portion 32 and the second connection portion 33 or the step 36.
Although the diameter of the cross section of the mounting foot 13 may differ depending on the model of the ventilation fan main body 10, the fixing member 30 having the above-described configuration can support a plurality of models having different mounting foot 13 diameters. The fixing member 30 can be shared among the models.

Further, a step is provided on the first contact portion 31 of the fixing member 30, and a fourth contact portion 31a and a fifth contact portion 31b that are different in position are provided.
Depending on the model of the ventilation fan main body 10, the distance between the mounting foot 13 and the frame 11 may be different, but with the configuration as described above, the fixing member 30 can be shared between the models. ..

  Further, in the fixing member 30, the second contact portion 34 and the third contact portion 35 are in contact with the guard 20 on both sides of the mounting foot 13. Therefore, the rotation of the fixing member 30 is suppressed, and it is possible to prevent the displacement of the mounting foot 13 and the mounting foot 13 from coming off the fixing member 30.

A modification of the first embodiment of the invention and a supplementary explanation will be shown below.
Although the step 36 is provided on the first contact portion 31 of the fixing member 30 of the first embodiment, the step may not be provided.
In this case, the first contact portion 31 is a linear member, but since both sides are sandwiched by the first connecting portion 32 and the second connecting portion 33, as in the first embodiment, from the mounting foot 13 to the fixing member. It is possible to prevent the 30 from coming off.
In addition, by making the axial length of the first contact portion 31 longer than the diameter of the cross section of the mounting foot 13, the fixing member can be shared by a plurality of models.
Further, similarly, the fixing member 30 is restrained from rotating, and it is also possible to restrain the displacement of the mounting foot 13 and the detachment of the mounting foot 13 from the fixing member 30.
Although the first contact portion 31 is a linear member, it may be a U-shaped member that curves and projects in a direction approaching the frame body 11.

Embodiment 2
Next, a second embodiment of the present invention will be described. Descriptions of parts similar to those in the configuration and operation described in the first embodiment will be omitted, and parts different from the first embodiment will be described below.
In the fixing member 30 of the first embodiment, the first contact portion 31 is provided with the step 36, and the fourth contact portion 31a and the fifth contact portion 31b contact the mounting feet 13 of the ventilation fan body 10 of different models. However, if the mounting foot 13 that comes into contact with the fifth contact portion 31b moves and falls onto the fourth contact portion 31a, the restraint of the fixing member 30 on the guard 20 and the ventilation fan body 10 is weakened. Become.
In the fixing member 30 of the second embodiment, the protrusion 37 is provided between the fourth contact portion 31a and the fifth contact portion 31b, and when the mounting foot 13 is in contact with the fifth contact portion 31b, The attachment feet 13 are prevented from falling onto the fourth contact portion 31a.

  As shown in FIG. 9, in the fixing member 30 according to the second embodiment, in addition to the configuration of the fixing member 30 according to the first embodiment, the wire rod forming the step 36 extends beyond the fifth contact portion 31b. After that, it is bent into a U shape and connected to the fifth contact portion 31b. This U-shaped bent portion is a protrusion 37, which protrudes from the side of the fifth contact portion 31b that contacts the mounting foot 13.

FIG. 10 shows a state in which the fixing member 30 according to the second embodiment is attached to the ventilation fan 100. In addition, in FIG. 10, in order to describe the protrusion 37, the rear of the mounting foot 13 is also shown.
The example of FIG. 10 is similar to the example of FIG. 7 of the first embodiment, but is different in that the second connecting portion 33, the protruding portion 37, and the mounting foot 13 are sandwiched. Even if the mounting foot 13 that has come into contact with the fifth contact portion 31b moves toward the fourth contact portion 31a, the attachment foot 13 comes into contact with the protrusion 37 and is prevented from moving.

The ventilation fan 100 and the fixing member 30 according to Embodiment 2 of the present invention are configured as described above, and have the following effects.
Even if the mounting foot 13 that is in contact with the fifth contact portion 31b moves to the fourth contact portion 31a side due to vibration of the ventilation fan main body 10 or the like, the protrusion 37 prevents the mounting foot 13 from moving. 4 It is possible to suppress falling onto the contact portion 31a. As a result, it is possible to prevent the restraint of the guard 20 and the ventilation fan main body 10 from being weakened by the fixing member 30.

A modified example and supplementary description of the second embodiment of the present invention are shown below.
Although the fourth contact portion 31a and the fifth contact portion 31b are linear members, each may be a U-shaped member that is curved and protrudes in a direction approaching the frame body 11.

Modifications and supplementary explanations of the ventilation fan 100 and the fixing member 30 according to the first and second embodiments of the present invention will be shown below.
In the first and second embodiments, the guard 20 is provided with the two linear wire members 27a and 27b for the fixing member 30 to contact, but as shown in FIG. 11, one wire member is bent. Alternatively, the wire member 27c with which the fixing member 30 abuts may be used.
Further, as shown in FIG. 12, the ring-shaped wire material forming the side wall portion 22 may be bent to be the wire material 27d with which the fixing member 30 abuts.

  Moreover, although the 2nd contact part 34 and the 3rd contact part 35 of the fixing member 30 of Embodiment 1 were made to contact | abut to the wire rods 27a and 27b, if the guard 20 can be drawn to the ventilation fan main body 10, It may abut on the ring-shaped wires 24 and 25, or may abut on the radial wire 23.

  The ventilation fan and its fixing member according to the present invention can be used as a ventilation fan installed in a factory or a building.

10 Ventilation Fan Main Body, 11 Frame, 12 Flange, 13 Mounting Foot, 14 Motor Fixture, 15 Motor, 16 Rotor Blade, 20 Guard, 21 Plane Section, 22 Sidewall Section, 23 Wire Rod, 24 Wire Rod, 25 Wire Rod, 26 Open Portion , 27 wire rod, 30 fixing member, 31 1st contact part, 32 1st connection part, 33 2nd connection part, 34 2nd contact part, 35 3rd contact part, 36 step, 37 protrusion part, 100 ventilation fan

Claims (6)

A ventilation fan main body including a fan, a frame body, and mounting feet for mounting the fan to the frame body,
One surface is arranged to face the fan and the frame body, and a guard that covers at least a part of the fan and the mounting foot,
A first contact part that contacts the frame side of the mounting foot, a second contact part and a third contact part that contact the guard so as to draw the guard toward the frame side, and the first contact part. And a first connecting portion that connects the second contact portion to each other, and a first connecting portion that connects the first contact portion and the third contact portion and sandwiches the mounting foot with the first connecting portion. A second connecting portion that contacts the guard in a state where the second contact portion and the third contact portion are elastically deformed in a direction in which the second contact portion and the third contact portion are separated from the first contact portion, and the guard is the ventilation fan. A fixing member for fixing to the main body,
Exhaust fan equipped with. The first contact portion has a step formed between the position where the first connecting portion is connected and the position where the second connecting portion is connected, and the step is formed between the step and the first connecting portion. The ventilating fan according to claim 1, further comprising: a fourth contact portion provided on the second contact portion, and a fifth contact portion provided between the step and the second connection portion. The first contact portion includes a protrusion between the fourth contact portion and the fifth contact portion, and on the side of the first contact portion that contacts the mounting foot. The ventilation fan according to claim 2, wherein: A first contact portion that is a rod-shaped member that abuts a mounting foot that attaches the fan to the frame of the ventilation fan main body;
A second contact portion and a third contact portion, which are rod-shaped members that contact the guard so as to attract the fan and the guard that covers at least a part of the mounting foot to the frame,
A first connecting portion that is a rod-shaped member that connects the first contact portion and the second contact portion;
A rod-shaped member that connects the first contact portion and the third contact portion, and a second connection portion that is arranged so as to sandwich the mounting foot with the first connection portion,
A fixing member that elastically deforms in a direction in which the second contact portion and the third contact portion are separated from the first contact portion. The first contact portion has a step formed between the position where the first connecting portion is connected and the position where the second connecting portion is connected, and the step is formed between the step and the first connecting portion. The fixing member according to claim 4, further comprising: a fourth abutting portion provided on the first contact portion and a fifth abutting portion provided between the step and the second connecting portion. The first contact portion includes a protrusion between the fourth contact portion and the fifth contact portion, and on the side of the first contact portion that contacts the mounting foot. The fixing member according to claim 5, wherein

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