JP7643700B2 - Blower - Google Patents

Description

The present invention relates to a blower that is attached to air-conditioned clothing or a ventilation device inside a helmet to circulate air inside the clothing or helmet.

In recent years, air-conditioning garments have been put into practical use that cool the body by evaporating sweat from the body by circulating a large amount of outside air approximately parallel to the surface of the body or underwear (see, for example, Patent Document 1).
In this air-conditioning garment, a fan (blower) is attached to a fan attachment hole provided in the air-conditioning garment.
A fan for an air-conditioned garment includes, for example, a case body incorporating a propeller rotated by a motor, and a finger guard attached to cover the opening of the case body, and is used by placing the case body on the inside of the garment and attaching the finger guard to the outside of the garment.
The propeller is rotated to send air taken in from the finger guard side to the case body side, causing air to circulate inside the air-conditioned garment.

The simplest method for attaching the fan to the fan mounting hole on the clothing body is, for example, to form threads (one male thread, the other female thread) on the opposing parts of the body of the case body and the body of the finger guard, insert the threads of the case body from the inside of the fan mounting hole, and screw the threads of the finger guard into the threads of the case body from the outside, thereby integrating the case body and the finger guard through the fan mounting hole and attaching the fan to the fan mounting hole.

JP 2019-206764 A

However, in the case of the fan for the air-conditioned clothing in Patent Document 1, it is difficult to clean the inside of the fan.
For example, dust that is drawn in along with the air as the propeller rotates can accumulate inside the fan, but because it is difficult to remove the finger guard from the case, there is a problem in that it is difficult to remove the dust.

However, in the case of fans in which the case body and the finger guard are integrated via the fan mounting hole by inserting the screw portion of the case body from the inside of the fan mounting hole and screwing the screw portion of the finger guard into the screw portion of the case body from the outside, the propeller built into the case body becomes exposed every time the fan is removed from the clothing body for washing, etc.
If the fan's propellers are exposed, problems can occur, such as the propellers suddenly rotating and hitting fingers or accidentally applying pressure to the propellers and damaging them, so a structure that exposes the propellers every time the fan is removed from the garment is not practical.

An object of the present invention is to provide a blower whose interior can be easily cleaned.
Another object of the present invention is to provide a blower that does not expose the propeller built into the blower when the blower is attached to or detached from clothing, etc., and further to provide a blower that allows the fan guard (rear guard) of the blower to be easily replaced and can be exchanged for a part having other elements.

In order to solve the above problems, the invention described in claim 1 is:
a case body having a front guard provided at one end of a cylindrical portion and incorporating a propeller;
a rear guard disposed at the other end of the cylindrical portion of the case body;
a frame-shaped member attached to an outer periphery of the cylindrical portion and attached to the case body in a state in which a sheet-shaped member is sandwiched between the frame-shaped member and a flange portion provided on the case body;
A blower that takes in air from the rear guard side and blows it out from the front guard side,
The rear surface of the flange portion and the front surface of the rear guard are removably fixed to each other, so that the rear guard is removably disposed on the case body.

The invention described in claim 2 is the blower described in claim 1,
The present invention is characterized in that it comprises a friction resistance imparting means for imparting friction resistance to the sheet-like member sandwiched between the frame-like member and a flange portion provided on the case body.

The invention described in claim 3 is the blower described in claim 1 or 2,
The rear guard is characterized in that it is provided with a slat-like lattice.

The invention described in claim 4 is the blower described in claim 3,
The ends of the blade-like lattice are characterized in that they are formed in a shape that curves outward.

The invention described in claim 5 is the blower according to any one of claims 1 to 4,
The rear guard has an inner cylindrical portion that is inscribed in the cylindrical portion of the case body, and an engagement claw is provided on the inner cylindrical portion,
The cylindrical portion of the case body is provided with a notch into which the engaging claw of the inner cylindrical portion is engaged,
The present invention is characterized in that, when the engaging claw of the inner cylindrical portion inserted into the cylindrical portion is engaged with the notch, the engagement of the engaging claw with the notch is released by rotating the cylindrical portion in a relative predetermined direction around the axis of the inner cylindrical portion.

The invention described in claim 6 is the blower described in any one of claims 1 to 5,
The rear guard is characterized in that a filter housing portion for housing a filter is provided at a position rearward of the propeller.
The invention described in claim 7 is the blower described in any one of claims 1 to 6,
The cylindrical portion is characterized in that it has a square cylindrical shape.

The present invention provides a blower that can be easily cleaned internally.

FIG. 2 is a front view showing the air-conditioning garment with the front body part open. This is a rear view showing the air-conditioning garment with the front body part closed. 1A is a top view of the fan of the present embodiment as viewed from the rear guard side, and FIG. 1B is a side view of the fan. 1A is an explanatory diagram of an opening formed in a sheet-like member, and FIG. 1B is a side view showing a state in which a fan is attached to the sheet-like member. FIG. 5A is a side view of the fan of embodiment 1 attached to a sheet-like member, seen from an angle different from that of FIG. 4B, and FIG. 5B is a side view showing the rear guard of the fan, the case body, and the frame-like member. FIG. 4 is a cross-sectional view showing the rear guard of the fan. FIG. 11 is a cross-sectional view showing a modified example of the rear guard of the fan. 13A and 13B are explanatory views of the engagement between the engagement claw of the rear guard and the cutout portion of the case body. 1A is a top view showing the frame-shaped member attached to the case body, and FIG. 1B is an explanatory diagram showing the frame-shaped member removed from the case body. 13A and 13B are a side view and a bottom view showing a modified example of the rear guard, and FIG. 13C is a plan view of a filter housed in the rear guard. 13A is a side view showing the state in which a fan of embodiment 2 is attached to a sheet-like member, and FIG. 13B is a side view showing the rear guard of the fan, the case body, and the frame-like member. 1A is a top view showing a case body of a fan of embodiment 2, (b) a top view of a rear guard attached to the case body, and (c) a top view of a rear guard that is replaceably attached to the case body. 1A is a top view showing a modified example of a fan case body, FIG. 1B is a top view showing a modified example of a fan rear guard, and FIG. 1C is a top view showing the rear guard attached to the case body. 13(a) is an A-A cross-sectional view (a), FIG. 13(a) is a B-B cross-sectional view (b), FIG. 13(a) is a CC cross-sectional view (c), FIG. 13(b) is a D-D cross-sectional view (d) of FIG. 13(b), FIG. 13(c) is an E-E cross-sectional view (e), and FIG. 13(c) is an F-F cross-sectional view (f). 1A is an explanatory diagram of an opening formed in a sheet-like member, and FIG. 1B is a side view showing a state in which a fan is attached to the sheet-like member. 15A is a top view showing a case body of the fan in FIG. 15B, and FIG. 15B is a top view showing a rear guard of the fan.

Hereinafter, an embodiment of a blower according to the present invention will be described in detail with reference to the drawings. However, the embodiment described below is subject to various limitations that are technically preferable for carrying out the present invention, but the scope of the present invention is not limited to the following embodiment and illustrated examples.
In this embodiment, an air-conditioning garment blower that is attached to an air-conditioning garment and used to circulate air within the garment will be described as an example.

First, an air-conditioned garment 100 equipped with a fan 1 serving as an air blower will be described.
In the following, the air-conditioned garment 100 will be described based on the state in which it is worn by a wearer, with the front side of the wearer defined as front, the back side of the wearer defined as back, the upper side of the wearer defined as top, the lower side of the wearer defined as bottom, the right hand side of the wearer defined as right, and the left hand side of the wearer defined as left.

(Embodiment 1)
As shown in Figures 1 and 2, the air-conditioned garment 100 comprises a garment body 210, fans 1,1 that introduce air into the garment body 210, a power supply unit 230 that supplies power to the fans 1,1, and a connection cable 240 that connects the power supply unit 230 and the fans 1,1. The air taken into the garment body 210 by the fans 1,1 is circulated along the surface of the wearer's body or underwear, thereby evaporating sweat from the body and cooling the body with the heat of vaporization generated during evaporation.

1 and 2, the clothing body 210 is formed in a shape covering the torso and arms of the wearer by a sheet-like member 200 that is not breathable or has breathability to the extent that it can be inflated by introducing air by fans 1, 1. In Fig. 1 and Fig. 2, the clothing body 210 is formed in the shape of a blouson-type upper garment, but the shape of the clothing body 210 is not limited to this and may be formed, for example, in a vest-type shape that covers only the torso of the wearer.
The clothing body 210 is equipped with a first opening and closing means 211, a second opening and closing means 212, an air leakage prevention means 213, fan mounting portions 214, 214, a collar air exhaust portion 215, sleeve air exhaust portions 216, 216, a power supply holding means 217, and cable holding means 218, 218, and is configured so that outside air taken in by fans 1, 1 from the fan mounting portions 214, 214 is exhausted from the collar air exhaust portion 215 and the sleeve air exhaust portions 216, 216.

The first opening and closing means 211 and the second opening and closing means 212 are for opening and closing the front of the clothing body 210 when the clothing body 210 opens at the front and the air-conditioned clothing 100 is worn, and as shown in Fig. 1, the first opening and closing means 211 is provided on the right side of the divided part of the front body of the clothing body 210 and the second opening and closing means 212 is provided on the left side, and these are configured to be easily put on and taken off. As the first opening and closing means 211 and the second opening and closing means 212, for example, a general linear fastener is used as shown in Fig. 1.
In Figure 1, a case is shown in which in addition to the teeth of the line fastener, a slider, a box and a box pin are provided in the second opening and closing means 212, and in addition to the teeth of the line fastener, a butterfly pin is provided in the first opening and closing means 211, but this is not limited to this. Conversely, in addition to the teeth of the line fastener, a slider, a box and a box pin may be provided in the first opening and closing means 211, and in addition to the teeth of the line fastener, a butterfly pin may be provided in the second opening and closing means 212.

1 and 2, the air leakage prevention means 213 is provided at the bottom of the clothing body 210 and prevents air in the space between the clothing body 210 and the wearer's body from leaking to the outside through the bottom part of the clothing body 210, and is formed, for example, by providing an elastic member such as an elastic band around the wearer's body near the end of the bottom of the clothing body 210. When the air-conditioned clothing 100 is worn, the air leakage prevention means 213 narrows the bottom part of the clothing body 210 to fit closely to the wearer's body, preventing air from leaking to the outside through the bottom part of the clothing body 210.
In addition, if the hem of the clothing body 210 is formed in a narrowed shape and the amount of air flowing out from the hem is small, it is not necessarily necessary to provide the air leakage prevention means 213.

As shown in FIGS. 1 and 2, the fan attachment parts 214, 214 have openings 201, 201 (see FIG. 4) formed in the sheet-like member 200 which is the fabric of the clothing body 210.
The openings 201, 201 are holes that connect the outside with the space between the clothing body 210 and the wearer's body when the air-conditioned garment 100 is worn, and fans 1, 1 are attached here.
As shown in Figures 1 and 2, the two fan mounting portions 214, 214 (openings 201, 201) are formed on the rear of the clothing body 210 at positions corresponding to the left and right sides of the wearer's waist and at the same height in the vertical direction.
The positions at which the fan attachment parts 214, 214 are formed are not limited to the positions mentioned above, and they may be formed on the side or front of the clothing body 210. Furthermore, the number of fan attachment parts 214 formed is not limited to two, and a smaller or larger number of fan attachment parts 214 may be formed and a corresponding number of fans 1 may be provided.

As shown in Figures 1 and 2, the collar air exhaust section 215 is an opening formed between the wearer's neck and the end of the collar of the clothing body 210 to allow the air introduced from the fan attachment section 214, 214 by the fans 1, 1 to flow along the wearer's body or underwear and then exhaust it.

As shown in Figures 1 and 2, the sleeve air exhaust section 216, 216 is an opening formed between the wearer's arm and the end of the sleeve of the clothing body 210 to allow the air introduced from the fan attachment section 214, 214 by the fan 1, 1 to flow along the wearer's body or underwear and then exhaust it.

1, the power supply unit holding means 217 is a pocket formed on the inner side of the clothing body 210, and stores the power supply unit 230. In FIG. 1, the power supply unit holding means 217 is shown to be provided at a lower position on the left side of the front body of the clothing body 210, but this is not limited thereto and the power supply unit holding means 217 can be provided at any position on the inner side of the clothing body 210.
It is not necessary to use a pocket as the power supply unit holding means 217, and any configuration can be adopted as long as the power supply unit 230 can be detachably attached to the clothing body 210. Furthermore, it is also possible not to provide the power supply unit holding means 217 on the clothing body 210, and instead to attach the power supply unit 230 to the belt of the wearer's trousers with a clip or the like, so that the power supply unit 230 is not attached to the clothing body 210.

The cable holding means 218, 218 is a means for holding the connection cable 240 on the inner surface of the clothing body 210, and is configured, for example, to have an opening through which the connection cable 240 can be inserted, so that the connection cable 240 can be held by inserting it through the opening.
The cable holders 218, 218 may be of various shapes and materials as long as they can hold the connection cable 240 in a predetermined position inside the clothing body 210. For example, they may be formed by sewing a vertically long piece of cloth at two points, top and bottom, like a general belt loop. The position of the cable holders 218 is not limited to that shown in FIG.

The fans 1,1 are attached to the fan mounting portions 214,214 and serve to introduce air into the space between the clothing body 210 and the wearer's body through the openings 201,201.
The fans 1 , 1 are supplied with necessary power from a power supply unit 230 via a connection cable 240 .

Next, we will explain the fan 1, which is the blower.

The fan 1 of this embodiment includes a case body 10 having a front guard 12 provided at one end of a cylindrical portion 11, a rear guard 20 disposed at the other end of the cylindrical portion 11 in the case body 10, and a frame-shaped member 30 attached to the outer periphery of the cylindrical portion 11 of the case body 10, as shown in Figures 3 to 6, for example.
A propeller (not shown) is built into the case body 10 of this fan 1, and the fan 1 takes in air from the rear guard 20 side and sends it out from the front guard 12 side, circulating the air within the air-conditioned garment 100.

As shown in Figure 4(a), a sheet-like member 200, which is the fabric of the air-conditioned garment 100 to which the fan 1 is attached, has an opening 201 formed therein having approximately the same shape as the outer edge shape of the tubular portion 11 of the case body 10, and a frame-like member 30 is attached to the tubular portion 11 of the case body 10 which is passed through the opening 201, and the fan 1 is attached to the sheet-like member 200 as shown in Figure 4(b).
Here, the tubular portion 11 of the case body 10 has a substantially cylindrical shape, and the opening 201 of the sheet-like member 200 has a substantially circular shape.
When attaching the fan 1 to the sheet-like member 200, the rear guard 20 is attached to the case body 10 in advance, and the case body 10 and the rear guard 20 are assembled together. The rear guard 20 is provided with a flange portion 22 that protrudes outward beyond the cylindrical portion 11 of the case body 10, and when the cylindrical portion 11 of the case body 10 is passed through the opening 201, the back surface of the flange portion 22 of the rear guard 20 comes into contact with the upper surface of the edge portion 202 of the opening 201.
Then, the frame-shaped member 30 is attached to the cylindrical portion 11 passed through the opening 201 of the sheet-shaped member 200, and when the fan 1 is attached to the sheet-shaped member 200, the sheet-shaped member 200 is sandwiched between the frame-shaped member 30 and the flange portion 22 of the rear guard 20.
That is, as shown in Figures 4 (b) and 5 (a), the fan 1 is attached to the air-conditioned garment 100 with the sheet-like member 20 sandwiched between the frame-like member 30 and the flange portion 22 of the rear guard 20.

As shown in Figs. 5(b) and 6, the rear guard 20 includes an inner cylindrical portion 21 that is inscribed in the cylindrical portion 11 of the case body 10, a flange portion 22 that protrudes outward in a direction substantially perpendicular to the side surface of the inner cylindrical portion 21, and a blade-shaped lattice 23 provided on the inside of the flange portion 22.

The inner cylindrical portion 21 is provided with engaging claws 21a for attaching the rear guard 20 to the case body 10. In this embodiment, the inner cylindrical portion 21 is provided with four engaging claws 21a.
The engaging claw 21a engages with a notch 11a of the case body 10, which will be described later.
At the tip of the engaging claw 21a, a hook-shaped engaging portion 21b and an inclined portion 21c for releasing the engaging claw 21a engaged with the case body 10 (notch portion 11a) are formed.
Further, slits 21d are formed on both sides of the engaging claw 21a, so that the engaging claw 21a can easily be elastically deformed like a leaf spring.
Incidentally, the inclined portion 21c has an inclined surface that slopes downward toward the adjacent slit 21d.

Then, as shown in Figures 8 (a) and (b), by inserting the inner tube portion 21 of the rear guard 20 into the tubular portion 11 of the case body 10, the engagement claws 21a of the inner tube portion 21 engage with the cutout portions 11a of the tubular portion 11, and the rear guard 20 is attached to the case body 10.
In addition, in a state where the engaging claws 21a of the inner cylindrical portion 21 inserted into the cylindrical portion 11 are engaged with the notches 11a of the cylindrical portion 11, the engagement of the engaging claws 21a by the notches 11a is released by rotating the cylindrical portion 11 in a predetermined direction relative to the inner cylindrical portion 21 around its axis. Here, by rotating the engaging claws 21a in a direction in which the inclined portions 21c of the engaging claws 21a slip into the inside of the cylindrical portion 11, the engagement of the engaging claws 21a by the notches 11a is released.
When the engagement of the engagement claw 21 a with the notch 11 a is released, the rear guard 20 can be removed from the case body 10 .
In this manner, the rear guard 20 is detachably disposed on the case body 10 .

The rear surface of the flange portion 22 is provided with a plurality of small protrusions 22 a that function as friction resistance imparting means for imparting friction resistance to the sheet-like member 200 sandwiched between the frame-like member 30 and the flange portion 22 .
As shown in Figures 4(b) and 5(a), when the fan 1 is attached to the sheet-like member 200, the small protrusions 22a of the flange portion 22 bite into the sheet-like member 200 sandwiched between the frame-like member 30 and the flange portion 22, thereby providing frictional resistance.
The small protrusions 22a of the flange portion 22 of the fan 1 attached to the sheet-like member 200 dig into the sheet-like member 200 to provide frictional resistance, making it difficult for the posture of the fan 1 attached to the sheet-like member 200 to shift, and preventing the fan 1 attached to the sheet-like member 200 from rotating inside the opening 201 of the sheet-like member 200.

The slat-like lattice 23 is the guard body of the rear guard 20, and has a structure called a louver or a shutter, for example, as shown in FIG.
The blade-like lattice 23 of this embodiment is formed in a manner that the center side is raised. Also, each lattice 23 may be formed parallel to each other.
In addition, the fan 1 is attached to the air-conditioned garment 100 so that, when a wearer wearing the air-conditioned garment 100 is in an upright position, the blade-shaped lattice 23 is inclined from the inside to the outside and from the top to the bottom.
The slat-like lattice 23 having such a structure ensures ventilation while making it difficult for foreign objects to enter the inside of the fan 1 from the outside, and functions, for example, as a finger guard to protect fingers from the rotating propeller.

For example, as shown in Fig. 7, the ends of each lattice 23 in the blade-like lattice 23 may be formed in a shape that is warped outward. If each lattice 23 has a curved shape, the strength of the lattice 23 is increased, which is preferable.
The blade-like lattice 23 has a curved shape such that the ends of each lattice 23 are perpendicular to the flange portion 22 .
In the case of a fan 1 having a blade-shaped lattice 23 of this type, the fan 1 is attached to the air-conditioned garment 100 so that when a wearer wearing the air-conditioned garment 100 is in an upright position, the ends of the blade-shaped lattice 23 are oriented horizontally.

5(c), the front guard 12 of the case body 10 includes a front end portion 12a on which a propeller (not shown) is rotatably supported, a plurality of rod-shaped portions 12b extending radially from the front end portion 12a and connecting the front end portion 12a to the cylindrical portion 11, and a ring-shaped portion 12c intersecting and connecting the rod-shaped portions 12b. The front end portion 12a of the front guard 12 is also provided with a motor for rotating the propeller.
This front guard 12 makes it difficult for foreign objects to enter the inside of the fan 1, and prevents foreign objects from interfering with the rotation of the propeller.

5C, one end of the cylindrical portion 11 of the case body 10 is provided with notches 11a into which the engaging claws 21a of the rear guard 20 engage. In this embodiment, the cylindrical portion 11 is provided with four notches 11a.
5C, the other end of the cylindrical portion 11 of the case body 10 is provided with cutout portions 11b into which the engaging protrusions 31 of the frame-shaped member 30 are engaged. In this embodiment, the cylindrical portion 11 is provided with a pair of cutout portions 11b.

5(d) and 9(a), the frame-shaped member 30 is a cylindrical member having a generally circular shape when viewed from above, and has an inner surface provided with an engaging protrusion 31 that protrudes inward. In this embodiment, the frame-shaped member 30 is provided with a pair of engaging protrusions 31.
When this frame-shaped member 30 is attached to the tubular portion 11 of the case body 10, the engaging protrusion 31 of the frame-shaped member 30 engages with the cutout portion 11b of the tubular portion 11 of the case body 10, so that the frame-shaped member 30 is attached to the case body 10.
9(b), when two portions of the frame-shaped member 30 that are approximately 90° apart from the portion where the pair of engaging projections 31 are located are pressed in a pinching manner, the portion of the frame-shaped member 30 where the pair of engaging projections 31 are located bulges outward. In this way, the engaging projections 31 of the frame-shaped member 30 come out of the cutout portions 11b of the cylindrical portion 11, making it possible to remove the frame-shaped member 30 from the cylindrical portion 11 of the case body 10. When the pressing force is released, the frame-shaped member 30 returns to its original shape.

In this way, in the fan 1 of this embodiment, the rear guard 20 is detachably arranged on the case body 10, so the user can remove the rear guard 20 from the case body 10 and clean the inside of the fan 1.

In addition, the rear guard 20 of the fan 1 of this embodiment is provided with a slat-like lattice 23, which makes it easier to prevent foreign matter from entering the inside of the fan 1 from the outside while ensuring ventilation.
Specifically, the gaps between the slatted lattice 23 are narrow, so that it is possible to prevent not only the user's fingers but also branches of plants and trees from getting inside the fan 1.
In particular, the slatted lattice 23 has a shape known as a louver or shutter, so that even if rain or water is sprayed onto the fan 1, the droplets can be prevented from entering the inside of the fan 1.

In addition, with the fan 1 of this embodiment, when the fan 1 is attached to the sheet-like member 200, the small protrusions 22a of the flange portion 22 bite into the sheet-like member 200 sandwiched between the frame-like member 30 and the flange portion 22, providing frictional resistance, thereby preventing the fan 1 attached to the sheet-like member 200 from rotating and shifting inside the opening 201 of the sheet-like member 200.

The present invention is not limited to the above-described embodiment.
For example, as shown in FIGS. 10( a ), 10 ( b ), and 10 ( c ), a filter housing portion 24 for housing a filter F may be provided in a rear guard 20 that is detachable from a case body 10 of a fan 1 .
The filter housing portion 24 is provided at a position rearward of the propeller in the fan 1 .
The filter accommodating portion 24 in this embodiment is provided between the inner cylinder portion 21 and the blade-shaped lattice 23 , and has three filter support rods 24 a hung across the inner wall of the rear guard 20 .
The filter F can be inserted between the filter support rods 24a and placed on top of the three filter support rods 24a, thereby storing the filter F between the filter support rods 24a and the blade-shaped lattice 23.
The filter F is, for example, a dust collecting sheet made of a nonwoven fabric. The filter F in this embodiment is folded in a zigzag shape.
If such a filter housing section 24 is provided in the rear guard 20, the rear guard 20 can be removed from the case body 10 and the filter F can be replaced, making it easy to clean the inside of the fan 1.

(Embodiment 2)
Next, a fan (blower) according to a second embodiment of the present invention will be described. Note that the same parts as those in the first embodiment are given the same reference numerals, and only the different parts will be described.

As shown in Figures 11 and 12, the fan 1 of the second embodiment includes a case body 10 having a front guard 12 at one end of a cylindrical portion 11, a rear guard 20 disposed at the other end of the cylindrical portion 11 of the case body 10, and a frame-shaped member 30 attached to the outer periphery of the cylindrical portion 11 of the case body 10.

As shown in Figure 11 (c), the case body 10 includes a cylindrical portion 11, a front guard 12 provided at one end of the cylindrical portion 11, and a flange portion 13 provided at the other end of the cylindrical portion 11.
The cylindrical portion 11 of the case body 10 is provided with a notch 11b with which the engaging projection 31 of the frame member 30 engages.

The flange portion 13 of the case body 10 is provided so as to protrude outward in a direction substantially perpendicular to the side surface of the cylindrical portion 11 .
As shown in Figure 11 (c), the back surface of this flange portion 13 is provided with multiple (four in this embodiment) protrusions 13a which function as frictional resistance imparting means for imparting frictional resistance to the sheet-like member 200 sandwiched between the frame-like member 30.
As shown in Figs. 11(c) and 12(a), an attachment portion 14 for attaching a rear guard 20 is provided on the surface of the flange portion 13.
The attachment portion 14 is an adhesive member, and for example, a double-sided tape can be used. The rear guard 20 can be attached to and removed from the attachment portion 14.

An engaging projection 31 that projects inward is provided on the inner surface of the frame-shaped member 30 .
As shown in FIG. 11D, one edge of the frame member 30 is provided with a plurality of recesses 32 (four in this embodiment).
When this frame-shaped member 30 is attached to the tubular portion 11 of the case body 10, the engaging protrusion 31 of the frame-shaped member 30 engages with the cutout portion 11b of the tubular portion 11 of the case body 10, so that the frame-shaped member 30 is attached to the case body 10.
Furthermore, when the frame-shaped member 30 is attached to the case body 10 , the recess 32 of the frame-shaped member 30 overlaps with the protrusion 13 a of the flange portion 13 of the case body 10 .

Then, a frame-shaped member 30 is attached to the cylindrical portion 11 of the case body 10, which is passed through an opening 201 (see Figure 4 (a)) formed in a sheet-shaped member 200, which is the fabric of the air-conditioned garment 100, and the fan 1 is attached to the sheet-shaped member 200, as shown in Figure 11 (a).
Specifically, when the cylindrical portion 11 of the case body 10 is passed through the opening 201 , the back surface of the flange portion 13 of the case body 10 comes into contact with the upper surface of the edge portion 202 of the opening 201 .
In addition, when the frame-shaped member 30 is attached to the cylindrical portion 11 that is passed through the opening 201 of the sheet-shaped member 200 and the fan 1 is attached to the sheet-shaped member 200, the sheet-shaped member 200 is sandwiched between the frame-shaped member 30 and the flange portion 13 of the case body 10.
In other words, the fan 1 is attached to the air-conditioned garment 100 with the sheet-like member 20 sandwiched between the frame-like member 30 and the flange portion 13 of the case body 10 .
At this time, the sheet-shaped member 200 is sandwiched between the recess 32 of the frame-shaped member 30 and the protrusion 13a of the flange portion 13, and frictional resistance is imparted to the sheet-shaped member 20, thereby preventing the fan 1 attached to the sheet-shaped member 200 from rotating and shifting inside the opening 201 of the sheet-shaped member 200.

As shown in Figures 11(b) and 12(b), the rear guard 20 includes a frame portion 20a which corresponds to the flange portion 22 of the first embodiment, and a blade-shaped lattice 23 provided inside the frame portion 20a.
The rear guard 20 can be attached to the case body 10 by overlapping the frame portion 20a of the rear guard 20 with the flange portion 13 of the case body 10 and attaching the frame portion 20a to the attachment portion 14 provided on the surface of the flange portion 13.
In other words, the rear guard 20 can be attached to and removed from the adhesive attachment portion 14 , and the rear guard 20 is detachably disposed on the flange portion 13 of the case body 10 .

In this way, in the fan 1 of embodiment 2, the rear guard 20 is detachably arranged on the flange portion 13 of the case body 10, so the user can remove the rear guard 20 from the case body 10 and clean the inside of the fan 1.

In particular, in the case of a rear guard 20 that is detachable from the flange portion 13 on which the attachment portion 14 is provided, it is easy to replace the rear guard 20 having a slat-shaped lattice 23 as shown in Figures 11(a) and 12(b) with a rear guard 20 having an interesting guard body formed to have a floral pattern, for example, as shown in Figure 12(c).
In other words, if you want to prevent branches of plants, raindrops, etc. from getting inside the fan 1, you can attach the rear guard 20 shown in Figure 12 (b) to the flange portion 13 of the case body 10, and if you want to emphasize fashionability, you can replace the rear guard 20 by attaching the rear guard 20 shown in Figure 12 (c) to the flange portion 13 of the case body 10.
In this embodiment, the replacement rear guard 20 is described as having a guard body with an interesting pattern, but it is also possible to replace the rear guard 20 with a guard body that has functions related to ventilation, etc.

The present invention is not limited to the above-described embodiment.
For example, as shown in Figures 13(a) to (c) and 14(a) to (f), an engagement groove 13b may be provided in the flange portion 13 of the case body 10, and an engagement protrusion 20b may be provided in the frame portion 20a of the rear guard 20, and the rear guard 20 may be attached to the case body 10 by engaging the engagement groove 13b of the case body 10 with the engagement protrusion 20b of the rear guard 20.
Specifically, the tip claw of the engaging protrusion 20b is adapted to engage with the notched hole of the engaging groove 13b.
Here, a pair of left and right engaging grooves 13b are provided on the flange portion 13 of the case body 10, and a pair of left and right engaging protrusions 20b are provided on the frame portion 20a of the rear guard 20.
For example, when attaching or detaching the rear guard 20 to or from the case body 10, the rear guard 20 can be bent and the engaging protrusions 20b of the rear guard 20 inserted into or pulled out of the engaging grooves 13b of the case body 10, thereby enabling attachment or detachment.
Specifically, one engaging protrusion 20b is inserted into the engaging groove 13b, and then the other engaging protrusion 20b is inserted into the engaging groove 13b to attach the rear guard 20 to the case body 10; or, one engaging protrusion 20b is removed from the engaging groove 13b, and then the other engaging protrusion 20b is removed from the engaging groove 13b to remove the rear guard 20 from the case body 10.
In particular, as shown in Figures 13(c), 14(e), and 14(f), when the rear guard 20 is attached to the case body 10, the frame portion 20 of the rear guard 20 is fitted inside the flange portion 13 of the case body 10, so that even if a certain amount of external force is applied to the rear guard 20, the rear guard 20 will not easily come off from the case body 10.
Even with this type of engagement structure, the rear guard 20 can be detachably disposed on the flange portion 13 of the case body 10 .
In addition, for the rear guard 20 (see Figure 12 (c)) having the guard body with the above-mentioned flower pattern, it is also possible to adopt such an engagement structure (a structure in which the engagement protrusion 20b of the rear guard 20 engages with the engagement groove 13b of the case body 10) and replace the rear guard 20.

Furthermore, the present invention is not limited to the above-described embodiment.
For example, as shown in FIGS. 15 and 16, the tubular portion 11 of the case body 10 of the fan 1 may have a substantially rectangular tubular shape.
In this case, the opening 201 of the sheet-like member 200 is formed to have a substantially rectangular shape, as shown in FIG. 15(a).
As shown in FIG. 16(a), the flange portion 13 of the case body 10 also has a generally rectangular shape when viewed from above, and as shown in FIG. 16(b), the rear guard 20 (frame portion 20a) also has a generally rectangular shape when viewed from above.

Even with such a fan 1, the rear guard 20 is removably arranged on the flange portion 13 on which the attachment portion 14 is provided, so that the user can remove the rear guard 20 from the case body 10 and clean the inside of the fan 1.
In particular, if the cylindrical portion 11 of the case body 10 of the fan 1 has an approximately angular cylindrical shape and the opening 201 of the sheet-shaped member 200 has an approximately rectangular shape, the fan 1 attached to the sheet-shaped member 200 will not rotate and shift inside the opening 201 of the sheet-shaped member 200, so there is no need to provide a convex portion 13a that functions as a frictional resistance imparting means on the back surface of the flange portion 13, as shown in Figure 15 (b), and there is no need to provide a concave portion 32 on one edge of the frame-shaped member 30.

As described above, with the fan 1 of this embodiment, the user can remove the rear guard 20 from the case body 10 and clean the inside of the fan 1 .
Furthermore, with this fan 1, when attaching or detaching the fan 1 to or from clothing, the propeller built into the fan 1 is not exposed, so the fan 1 can be attached or detached without damaging the propeller.
In addition, with this fan 1, the rear guard 20 (fan guard) can be easily replaced, so it can be replaced with a rear guard 20 (fan guard) having other elements (e.g., functionality, aesthetics, etc.).

In the above embodiment, an air-conditioned garment fan 1 (air-conditioned garment blower) that is attached to the air-conditioned garment 100 and used to circulate air inside the garment has been described as an example, but the present invention is not limited to this, and may be, for example, a fan (blower) that is attached to an internal helmet ventilation device and used to circulate air inside the helmet.

Of course, other specific details of the structure can also be changed as appropriate.

1 Fan (blower)
REFERENCE SIGNS LIST 10 Case body 11 Cylindrical portion 11a Cutout portion 11b Cutout portion 12 Front guard 12a Front end portion 12b Rod-shaped portion 12c Ring-shaped portion 13 Flange portion 13a Convex portion (friction resistance imparting means)
13b Engagement groove 14 Adhesive portion 20 Rear guard 20a Frame portion 20b Engagement protrusion 21 Inner cylinder portion 21a Engagement claw 21b Engagement portion 21c Inclined portion 21d Slit 22 Flange portion 22a Small protrusion (friction resistance imparting means)
23 Blade-shaped lattice 24 Filter housing section 24a Filter support rod 30 Frame-shaped member 31 Engagement protrusion 32 Recess 100 Air-conditioned garment 200 Sheet-shaped member 201 Opening 210 Garment body F Filter

Claims (7)

a case body having a front guard provided at one end of a cylindrical portion and incorporating a propeller;
a rear guard disposed at the other end of the cylindrical portion of the case body;
a frame-shaped member attached to an outer periphery of the cylindrical portion and attached to the case body in a state in which a sheet-shaped member is sandwiched between the frame-shaped member and a flange portion provided on the case body;
A blower that takes in air from the rear guard side and blows it out from the front guard side,
A blower characterized in that the rear surface of the flange portion and the front surface of the rear guard are removably fixed to each other, so that the rear guard is removably arranged on the case body. 2. The blower according to claim 1, further comprising a friction resistance imparting means for imparting friction resistance to the sheet-like member sandwiched between the frame-like member and a flange portion provided on the case body. The blower according to claim 1 or 2, characterized in that the rear guard is provided with a slat-shaped grid. The blower according to claim 3, characterized in that the ends of the blade-shaped lattice are formed in a shape that curves outward. The rear guard has an inner cylindrical portion that is inscribed in the cylindrical portion of the case body, and an engagement claw is provided on the inner cylindrical portion,
The cylindrical portion of the case body is provided with a notch into which the engaging claw of the inner cylindrical portion is engaged,
A blower as described in any one of claims 1 to 4, characterized in that, when the engagement claws of the inner cylindrical portion inserted into the cylindrical portion are engaged with the notches, the engagement of the engagement claws with the notches is released by rotating the cylindrical portion in a relative predetermined direction around the axis of the inner cylindrical portion. The blower according to any one of claims 1 to 5, characterized in that the rear guard is provided with a filter housing portion that houses a filter at a position rearward of the propeller. The blower according to any one of claims 1 to 6, wherein the tubular portion has a rectangular tubular shape.

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