JP6983534B2 - Ventilation fan cover - Google Patents

Description

The present invention relates to a ventilation fan cover, and more particularly to a ventilation fan cover that is detachably attached to the ventilation fan frame.

FIG. 7 is a schematic perspective view showing how the conventional ventilation fan cover is attached to the ventilation fan frame, in which (1) is a state before attachment and (2) is an attachment state.

With reference to FIG. 7, the ventilation fan cover 71 is composed of a ventilation fan cover main body 72 which is an aluminum foil molded body to which a filter 73 made of a non-woven fabric is attached to a central portion thereof. Engagement portions 74 are formed on opposite side portions of the ventilation fan cover main body 72. A mounting hole 77 for mounting the hook portion 88, which will be described later, is formed in the engaging portion 74. Further, the ventilation fan cover main body 72 is provided with a downward extension portion 75 connected and extended below the ventilation fan cover main body 72. The lower extension portion 75 is formed with ruled lines 76a and 76b extending in the left-right direction when the filter 73 is viewed from the front, and the lower extension portion 75 is bendable along the ruled lines 76a and 76b.

The ventilation fan frame 81 is detachably attached to the wall 90, and has a front portion 83 that supports the periphery of the suction port 82, a side wall 84 that is connected to the four end portions of the front portion 83 and extends toward the wall 90, and a side wall 84. It is composed of a coil spring 85 to which one end portion 86 is detachably attached to the side wall 84. Further, a hook portion 88 is formed at the other end portion 87 of the coil spring 85. Patent Document 1 discloses a technique relating to a fixture for a ventilation fan cover using such a coil spring or the like.

When attaching the ventilation fan cover 71, for example, first, the ventilation fan frame 81 is removed from the wall 90, and a pair of thin plate pieces 79 are attached so as to sandwich the opposite side wall 84 ends of the removed ventilation fan frame 81, and the thin plate piece 79 is attached. Coil spring 85 is attached to. Next, as shown in FIG. 7 (1), the upper end 78 of the ventilation fan cover 71 is overlapped so as to be along the upper side wall 89 of the ventilation fan frame 81, and then the arrow of the alternate long and short dash line in FIG. 7 (1). As shown by, the entire ventilation fan cover 71 is fitted so as to cover the ventilation fan frame 81. Next, the hook portion 88 of the coil spring 85 is engaged with the mounting hole 77. Then, the lower extension portion 75 is bent toward the ventilation fan frame 81 along the ruled lines 76a and 76b to cover the lower side wall 80 of the ventilation fan frame 81. In this way, the ventilation fan cover 71 is detachably attached to the ventilation fan frame 81, and the air flowing into the suction port 82 is filtered by the filter 73 to prevent oil stains on the ventilation fan inside the suction port 82.

If the filter 73 becomes dirty due to use over time, the ventilation fan cover 71 can be easily removed from the ventilation fan frame 81 and replaced by removing the hook portion 88 from the mounting hole 77.

Japanese Unexamined Patent Publication No. 9-79626

However, in the conventional ventilation fan cover 71 as described above, it is complicated because it is necessary to first remove the ventilation fan frame 81 from the wall 90 when attaching the ventilation fan frame 81 to the ventilation fan frame 81. Further, the ventilation fan frame 81 is often attached to a high place, and in that case, the side wall 84 of the ventilation fan frame 81, which is a work place, is difficult to see or it is necessary to prepare a scaffolding, which is more complicated. rice field. Therefore, there has been a long-awaited need for a ventilation fan cover that can be installed more easily.

The present invention has been made to solve the above problems, and an object of the present invention is to provide a ventilation fan cover that can be easily attached.

In order to achieve the above object, the invention according to claim 1 is a ventilation fan cover attached to a ventilation fan frame, the ventilation fan cover main body having a recess formed in the direction opposite to the ventilation fan frame from the surface thereof, and the inside of the recess. The fixing means is provided in the above, and the ventilation fan frame and the ventilation fan cover main body can be detachably fixed in a contact state . The fixing means is installed on the surface of the ventilation fan frame at a position corresponding to the recess of the ventilation fan cover main body. The length of the recess in the recessing direction is the sum of the thickness of the joint and the thickness of the joint, including the joint that can be formed and the joint that is installed in the recess and can be joined to the joint. It is the same as the length .

With this configuration, the fixing means is housed in the recess in the fixed state. Further, the ventilation fan cover is fixed to the ventilation fan frame by installing a joint portion in the ventilation fan frame and installing a joint portion in the ventilation fan cover and attaching the ventilation fan cover to the ventilation fan frame.

The invention according to claim 2 is the constitution of the invention according to claim 1, wherein one of the joined portion and the joined portion is a first magnet and the other is a magnetic material capable of joining with the first magnet. Is.

With this configuration, the ventilation fan cover is fixed to the ventilation fan frame by magnetic force.

According to a third aspect of the present invention, in the configuration of the second aspect of the present invention, the joint portion is fitted inside the recess, and the magnetic material is the second magnet, that is, the first magnet and the second magnet. Has the same shape in the direction in which the ventilation fan cover is attached to the ventilation fan frame, and the shapes are inconsistent when rotated by 180 ° up and down.

When configured in this way, it suggests the direction in which the first magnet and the second magnet should be attached.

The invention according to claim 4 is a ventilation fan cover attached to a ventilation fan frame in which one of the fixing means is installed on at least a part of the surface thereof, and at a position corresponding to one of the fixing means when attached to the ventilation fan frame. A ventilation fan cover body having a recess formed in the direction opposite to the ventilation fan frame from its surface and the other of the fixing means that can be installed in the recess are provided, and one of the fixing means and the other are joined to form a ventilation fan. It can be detachably fixed to the frame in a contact state, and the fixing means is installed and joined to the joint portion that can be installed on the surface of the ventilation fan frame at a position corresponding to the recess of the ventilation fan cover body. The recessed length of the recess, including the portion to be joined and the portion to be joined, is the same as the total length of the thickness of the joint and the thickness of the joint .

With this configuration, the ventilation fan cover can be attached to the ventilation fan frame by fixing the other of the fixing means to the ventilation fan cover and joining the fixing means to the ventilation fan frame. Further, the ventilation fan cover is fixed to the ventilation fan frame by installing a joint portion in the ventilation fan frame and installing a joint portion in the ventilation fan cover and attaching the ventilation fan cover to the ventilation fan frame.

The invention according to claim 5 is the configuration of the invention according to any one of claims 1 to 4 , wherein the material of the ventilation fan cover main body is polyvinyl chloride.

When configured in this way, it becomes a flame-retardant ventilation fan cover.

As described above, in the invention according to claim 1, since the fixing means is housed in the recess in the fixed state, the ventilation fan cover can be easily attached and the attached state is stable. Further, by installing the joint portion on the ventilation fan frame and installing the joint portion on the ventilation fan cover and attaching the ventilation fan cover to the ventilation fan frame, the ventilation fan cover is fixed to the ventilation fan frame, so that the ventilation fan cover can be easily attached.

In the invention according to claim 2 , in addition to the effect of the invention according to claim 1 , since the ventilation fan cover is fixed to the ventilation fan frame by a magnetic force, performance deterioration due to long-term use is reduced and long-term stability is improved. ..

The invention according to claim 3 has, in addition to the effect of the invention according to claim 2 , the first magnet and the first magnet when installing the ventilation fan cover in order to suggest the direction in which the first magnet and the second magnet should be attached. Prevents misalignment of the second magnet.

According to the fourth aspect of the present invention, the ventilation fan cover can be attached to the ventilation fan frame by fixing the other of the fixing means to the ventilation fan cover and joining the fixing means to the ventilation fan frame, so that the ventilation fan cover can be easily attached. Further, by installing the joint portion on the ventilation fan frame and installing the joint portion on the ventilation fan cover and attaching the ventilation fan cover to the ventilation fan frame, the ventilation fan cover is fixed to the ventilation fan frame, so that the ventilation fan cover can be easily attached.

The invention according to claim 5 is suitable for a ventilation fan which may reach a high temperature because it is a flame-retardant ventilation fan cover in addition to the effect of the invention according to any one of claims 1 to 4. Can be used for.

It is a front view which shows the whole shape of the ventilation fan cover by 1st Embodiment of this invention. It is a right side view which shows the state before and after the installation of the ventilation fan cover with respect to the ventilation fan frame shown in FIG. 1, (1) is the state before installation, and (2) is the state of installation. FIG. 2 is a schematic enlarged cross-sectional view of the X portion shown in FIG. 2, where (1) is a state before mounting and (2) is a mounting state. It is a front view which shows the whole shape of the ventilation fan cover by 2nd Embodiment of this invention, and corresponds to FIG. It is a right side view showing the state before and after the installation of the ventilation fan cover with respect to the ventilation fan frame shown in FIG. 4, and corresponds to FIG. 2, (1) is the state before installation, and (2) is the installation state. Is. It is a schematic enlarged cross-sectional view of the Y portion shown in FIG. 5, and corresponds to FIG. 3, (1) is a state before mounting, and (2) is a mounting state. FIG. 7 is a schematic perspective view showing how the conventional ventilation fan cover is attached to the ventilation fan frame, in which (1) is a state before attachment and (2) is an attachment state.

FIG. 1 is a front view showing the overall shape of the ventilation fan cover according to the first embodiment of the present invention, and FIG. 2 is a right side view showing a state before and after attachment of the ventilation fan cover shown in FIG. 1 to the ventilation fan frame. (1) is the state before mounting, and (2) is the mounting state.

In the present specification, the vertical / horizontal direction means the vertical / horizontal direction in the front direction (direction in which the ventilation fan cover is attached to the ventilation fan frame) as shown in FIG. Further, the front direction (front direction) refers to the direction of the ventilation fan cover with respect to the ventilation fan frame based on the mounting state in which the ventilation fan cover is attached to the ventilation fan frame, and the reverse direction is referred to as the rear direction (back direction).

First, referring to FIG. 1, the ventilation fan cover 1 has a substantially rectangular shape in front view, and is composed of a ventilation fan cover main body 2 to which a filter 3 made of a non-woven fabric is attached to a central portion thereof. The ventilation fan cover main body 2 is formed by vacuum forming a polyvinyl chloride sheet, and the portion excluding the opening 4 to which the filter 3 is attached has a thickness of about 1 mm. Further, an extension portion 7 (left extension portion 7a, upper extension portion 7b, right extension portion 7c) connected to the entire outer peripheral edge of the ventilation fan cover main body 2 via bendable ruled lines 6a to 6d, and extends outward. The lower extension portion 7d) is formed. Further, a ruled line 6e extending so as to cross in the left-right direction is further formed in the lower extension portion 7d. The effect of the extension will be described later.

Further, the ventilation fan cover main body 2 is formed with recesses 9a to 9d recessed in the opposite direction (forward direction) to the ventilation fan frame (not shown) at the four corners thereof based on the mounting state. Also referring to (1) of FIG. 2, a vertically long rectangular sheet-shaped first magnet 10b as one of the fixing means is provided inside the recess 9b by using double-sided tape. A first magnet 10c is provided inside the recess 9c, and each of the first magnets 10a and 10d is similarly provided inside each of the recesses 9a and 9d shown in FIG. Further, referring to (2) of FIG. 2, the positions corresponding to each of the first magnets 10b and 10c on the surface of the ventilation fan frame 81 in the mounted state (at least of the first magnet and the second magnet in the front view). Each of the second magnets 11a and 11b is previously installed with double-sided tape at the position where a part of the magnets overlaps). Therefore, as shown by the arrow of the alternate long and short dash line in FIG. 2, the magnetic force is obtained by bringing the ventilation fan cover 1 closer to the ventilation fan frame 81 so that each of the first magnets 10b and 10c and each of the second magnets 11a and 11b overlap. Can be attached and detached freely. After the ventilation fan cover 1 is attached, each of the upper extension portion 7b and the lower extension portion 7d is bent toward the ventilation fan frame 81 along the ruled lines 6b and 6d, so that each of the upper side wall 89 and the lower side wall 80 of the ventilation fan frame 81 is bent. It can be attached so as to cover at least a part. As described above, since the lower extension portion 7d is formed with a ruled line 6e extending so as to cross in the left-right direction, the ventilation fan cover 1 is adjusted along the lower side wall 80 even when the lower side wall 80 is not flat. can do.

Next, the attachment of the ventilation fan cover 1 will be described in more detail.

FIG. 3 is a schematic enlarged cross-sectional view of the X portion shown in FIG. 2, where (1) is a state before mounting and (2) is a mounting state.

With reference to FIG. 3, as described above, the ventilation fan cover 1 provided with the first magnet 10b inside the recess 9b as shown in FIG. 3 (1) is indicated by the solid arrow in FIG. By attaching the magnet to the ventilation fan frame 81, the attachment state shown in FIG. 3 (2) is obtained.

Then, in the mounted state of FIG. 3 (2), the recessed length D _{1 of} the recess 9b, in other words, the back surface 12 of the recess 9b (the surface in the direction of the ventilation fan frame 81) to the surface 13 of the ventilation fan frame 81 (ventilation fan cover 1). the length _{D 1} of the up direction of the surface), the recessed direction length of the first magnet 10b (i.e., thickness) _{D 2} and recessed direction length of the second magnet 11a (i.e., the thickness) _{D 3} It is set to be substantially the same as the total length of (D ₁ = D ₂ + D _3). As a result, in the case of a ventilation fan cover having no recess, the ventilation fan cover body may be lifted by the thickness of the fixing means with respect to the ventilation fan frame, and air may flow into the suction port without passing through the filter. The ventilation fan cover 1 of the present invention can fix the ventilation fan frame 81 and the ventilation fan cover main body 2 in a contact state by the recess 9.

Further, in the mounted state, the first magnet 10b and the second magnet 11a are covered and protected by the recess 9b, so that the first magnet 10b and the second magnet 11a are subjected to an unexpected impact from the outside. The risk of accidental dropping is reduced, and the stability of the mounted state is improved.

In this way, the ventilation fan cover main body 2 in which the concave portion 9 is formed in the direction opposite to the ventilation fan frame 81, and the ventilation fan frame 81 and the ventilation fan cover main body 2 provided inside the concave portion 9 are detachably fixed in contact with each other. A ventilation fan cover structure 15 including a fixing means (first magnet 10 and a second magnet 11) and a ventilation fan frame 81 is configured. As a result, the ventilation fan cover is easily and stably attached to the ventilation fan frame, and the filter of the ventilation fan cover filters the air flowing in from the suction port (not shown).

As described above, the ventilation fan cover 1 can be attached to the ventilation fan frame 81 by fixing means (first magnet 10 and second magnet 11), and at that time, the fixing means (first magnet 10 and second magnet 11). By providing the magnet 11) inside the recess 9, the ventilation fan frame 81 and the ventilation fan cover 1 can be fixed in contact with each other. That is, the fixing means is housed in the recess in the fixed state. As a result, the ventilation fan cover can be easily attached and the attached state can be stabilized.

Here, the ventilation fan frame may have a protrusion protruding in the direction of the ventilation fan cover with reference to the mounting state. If the protrusion is not minute and is so large that it cannot be absorbed due to the bending of the ventilation fan cover body, it may hinder the attachment of the ventilation fan cover, which is a problem. A second embodiment of the present invention that can solve such a problem will be described below.

FIG. 4 is a front view showing the overall shape of the ventilation fan cover according to the second embodiment of the present invention, and corresponds to FIG. 1. Further, FIG. 5 is a right side view showing the state before and after the installation of the ventilation fan cover shown in FIG. 4 with respect to the ventilation fan frame, which corresponds to FIG. 2, and (1) is the state before installation. 2) is the mounted state. FIG. 6 is a schematic enlarged cross-sectional view of the Y portion shown in FIG. 5, which corresponds to FIG. 3, in which (1) is a state before mounting and (2) is a mounting state.

Since the basic configuration of the ventilation fan cover 21 according to the second embodiment is the same as that of the ventilation fan cover 1 according to the first embodiment described above, the differences will be mainly described below.

With reference to these figures, the ventilation fan cover main body 22 is formed with convex protrusions 29a to 29d at its four corners in the direction (rear direction) of the ventilation fan frame 61 with reference to the mounting state. Further, on the surface of each of the tip portions of the convex portions 29a to 29d, each of the first magnets 30a to 30d is installed by using double-sided tape.

Further, the ventilation fan frame 61 to which the ventilation fan cover 21 is attached is formed with a protrusion 62 projecting in the direction of the ventilation fan cover 21.

Then, in the mounted state of FIG. 6 (2), the length D ₄ from the ventilation fan cover main body 22 to the ventilation fan frame 61, that is, the length in the protruding direction of the convex portion 29b (the convex portion from the back surface 32 of the ventilation fan cover main body 22). Length to the surface of 29b) D _{5 , length D 6} in the protruding direction of the first magnet 30b _{, and length D 7} in the protruding direction of the second magnet 31a (D ₄ = D ₅₎ + D ₆ + D ₇ ) is set so as to exceed _{the length D 8} of the protrusion 62 in the protruding direction _{(D 4} ≧ D _8). Therefore, the possibility that the protrusion 62 comes into contact with the back surface 32 of the ventilation fan cover main body 22 is reduced. As described above, in the case of the ventilation fan cover having no convex portion, there is a possibility that the ventilation fan cover may come into contact with the protrusion 62 and the attachment may be hindered. It can be detachably fixed so as to float with respect to 61.

Further, the ventilation fan cover 21 is connected to the entire outer peripheral edge of the ventilation fan cover main body 22, and can cover the side wall (for example, the upper side wall 63) of the ventilation fan frame 61. The upper extension portion 27b) that covers the upper side wall 63 in the state is provided. Therefore, the possibility that air will flow into the suction port (not shown) without passing through the filter 23 of the ventilation fan cover 21 is reduced.

In this way, the ventilation fan cover main body 22 having the convex portion 29 formed in the direction of the ventilation fan frame 61 and the ventilation fan frame 61 and the ventilation fan cover main body 22 provided on the convex portion 29 can be detachably fixed. Ventilation fan cover structure 35 including fixing means (first magnet 30 and second magnet 31) and an extension portion 27 connected to the entire outer peripheral edge of the ventilation fan cover main body 22 and capable of covering the side wall of the ventilation fan frame 61. Is configured. As a result, the ventilation fan cover is easily attached to the ventilation fan frame on which the protrusion is formed, and the filter of the ventilation fan cover filters the air flowing in from the suction port (not shown).

As described above, in the ventilation fan cover 21, the ventilation fan cover 21 can be attached to the ventilation fan frame 61 by fixing means (first magnet 30 and second magnet 31), so that the ventilation fan cover can be easily attached. become. Further, even when the protrusion 62 is formed on the ventilation fan frame 61, the first magnet 30 and the second magnet 31 can be easily brought close to each other, so that the model compatibility with the ventilation fan frame is improved. Further, when the fixing means are a sheet-shaped first magnet and a second magnet, and these are provided so as to fit inside the recess, if the installation directions are different, they cannot be joined at an accurate position. However, in the case of the ventilation fan cover 21, the installation can be completed even if the position shift occurs to some extent, and the allowable range for the position shift becomes large. Therefore, the direction between the first magnet and the second magnet. The need for decision is reduced and usability is improved.

In each of the above embodiments, the filter is made of a non-woven fabric, but other materials may be used. Further, the present invention can be similarly applied to a ventilation fan cover that does not have a filter and simply covers the ventilation fan frame.

Further, in each of the above embodiments, the ventilation fan cover main body is made of polyvinyl chloride, but other materials may be used. For example, it may be another synthetic resin or an aluminum foil molded product. However, in the case of polyvinyl chloride, since it is a flame-retardant ventilation fan cover, it can be suitably used for a ventilation fan that may reach a high temperature, which is preferable.

Further, in each of the above embodiments, a bendable ruled line is formed on the ventilation fan cover main body, and the state is flat before mounting, but the end portions of the adjacent extension portions are connected to each other by being bent before mounting. It may have been done. Further, the ruled line does not have to be formed.

Further, in the first embodiment described above, the extension portion is formed, but one or all of the extension portions may not be formed.

Further, in each of the above embodiments, the ventilation fan cover main body has a specific shape, but may have another shape.

Further, in each of the above embodiments, the first magnet is provided inside the concave portion or at a specific position of the convex portion, but may be provided inside the concave portion or at another position of the convex portion.

Further, in each of the above-described embodiments, the second magnet is installed on the surface of the ventilation fan frame in advance before mounting, but other mounting methods may be used. For example, a second magnet is attached to the ventilation fan frame side of the first magnet and a double-sided tape is attached to the ventilation fan frame side of the second magnet, and when the ventilation fan cover is attached to the ventilation fan frame, the second magnet is simultaneously attached. A method of installing a magnet on the surface of the ventilation fan frame may also be used.

Further, in each of the above embodiments, the first magnet and the second magnet are used as the fixing means, but other fixing means may be used. For example, like a hook-and-loop fastener, one of the fixing means is a joint that can be installed on the surface of the ventilation fan cover body at a position corresponding to the concave or convex portion of the ventilation fan frame, and the other of the fixing means is installed in the concave or convex portion. It may be a jointed portion that can be joined to the joined portion at the same time. With this configuration, a joint is installed in the ventilation fan frame, a joint is installed in the ventilation fan cover, and the ventilation fan cover is attached to the ventilation fan frame to fix the ventilation fan cover to the ventilation fan frame. Therefore, it becomes easy to attach the ventilation fan cover, and it is also easy to remove the ventilation fan cover while maintaining the state in which the joint portion is installed in the ventilation fan frame, and to replace the joint portion without the need for positioning.

Further, in each of the above embodiments, the first magnet is used as the bonded portion (one of the fixing means), and the second magnet is used as the bonding portion (the other of the fixing means). Other magnetic materials such as an iron plate may be used instead of the magnet of. Further, the positional relationship between the first magnet and the magnetic material may be exchanged with each other.

It is preferable that one of the above-mentioned bonded portion and the bonded portion is a first magnet and the other is a magnetic material that can be bonded to the first magnet. With this configuration, the ventilation fan cover is fixed to the ventilation fan frame by magnetic force, so that performance deterioration due to long-term use is reduced and long-term stability is improved.

Further, in each of the above embodiments, the first magnet and the second magnet have a specific shape, but other shapes may be used. For example, there is a pentagonal shape in which the ventilation fan covers have the same shape in the directional view (front view) when the ventilation fan cover is attached to the ventilation fan frame, and the shapes do not match when rotated by 180 ° up and down. With such a configuration, since the direction in which the first magnet and the second magnet should be attached is suggested, it is possible to prevent the misalignment of the first magnet and the second magnet when installing the ventilation fan cover. can.

Further, in each of the above embodiments, the first magnet is installed so as to be fitted to the surface inside the recess by using double-sided tape, but it does not have to be installed so as to be fitted. For example, the recess may be formed larger than the first magnet or the second magnet. Further, the means of installation is not limited to double-sided tape, and other physical or chemical methods may be used. For example, a method using an adhesive, a method of forming a protrusion around the installation location, and a method of fixing the position by allowing the first magnet to get over the protrusion and the like can be mentioned. From the viewpoint of facilitating the replacement of the ventilation fan cover, the fixing strength of the first magnet (joint portion) to the ventilation fan cover and the second magnet (joint portion) to the ventilation fan frame are as in the first embodiment. It is preferable that the fixing strength of the above is stronger than the attractive force between the first magnet and the second magnet (bonding strength due to the joint portion and the jointed portion).

Further, in the first embodiment described above, the length of the recess in the depressed direction is set so _{that D 1} = D ₂ + D _{3 shown in FIG. 3, but if the ventilation fan cover can be attached, There may be a dimensional relationship (D 1} > D ₂ + D ₃ ) in which the first magnet and the second magnet are separated to the extent that a magnetic force is generated. Further, when the first magnet and the second magnet are thicker, or when the surface of the ventilation fan frame is uneven, the ventilation fan cover is separated from the ventilation fan frame (D ₁ <D ₂ + D ₃ ). However, if the air flowing into the suction port is set to be substantially filtered by the filter, these cases are also included in the contact state.

Further, in each of the above embodiments, a plurality of concave portions or convex portions are formed, but at least one is sufficient, and the position, range and size thereof can be appropriately changed.

Further, in the second embodiment described above, the ventilation fan frame is formed with protrusions, but the ventilation fan cover can be similarly attached to the ventilation fan frame without the protrusions.

Further, in the second embodiment described above, in the mounted state, the total length of the protrusion and the fixing means in the protrusion direction is set to exceed the length of the protrusion in the protrusion direction. If it has a convex portion even if it is not provided, the possibility that the attachment of the ventilation fan cover is obstructed by the protrusion is reduced.

Further, in the second embodiment described above, by having the convex portion, the position of the fixing means is maintained in the same manner as in the first embodiment, and the contact between the ventilation fan cover main body and the protrusion of the ventilation fan frame is avoided. However, the possibility that the function of the ventilation fan cover may be hindered due to the protrusions causing the ventilation fan cover to float with respect to the ventilation fan frame may be solved by another method. For example, form a plurality of bendable ruled lines so that the ventilation fan cover body does not come into contact with the protrusions, and make a concave recess in the direction opposite to the ventilation fan frame at the position corresponding to the protrusion on the ventilation fan cover. Examples include forming so as to cover, forming an opening at the position, forming a cross-shaped notch at the position, and the like.

Further, in each of the above embodiments, the extension portion covers the upper side wall of the ventilation fan frame and the like, but it is not necessary to cover the entire side wall to cover the side wall, and the air flowing into the suction port during use does not need to be covered. It suffices to cover the surface around the suction port of the ventilation fan frame so that the air can pass through the filter substantially. Even if it is not present, it is included in the state of covering the side wall.

1, 21 ... Ventilation fan cover 2, 22 ... Ventilation fan cover body 7, 27 ... Extension 9 ... Concave 10, 30 ... First magnet 11, 31 ... Second magnet 29 ... Convex 61, 81 ... Ventilation fan frame 62 ... Projections 63, 89 ... Upper side wall 64, 80 ... Lower side wall Note that the same reference numerals in the drawings indicate the same or corresponding portions.

Claims (5)

A ventilation fan cover that can be attached to the ventilation fan frame.
A ventilation fan cover body having a recess formed in the direction opposite to the ventilation fan frame from the surface thereof,
A fixing means provided inside the recess and capable of detachably fixing the ventilation fan frame and the ventilation fan cover main body in a contact state is provided .
The fixing means has a joint portion that can be installed on the surface of the ventilation fan frame at a position corresponding to the recess of the ventilation fan cover main body.
Including a joint portion that is installed in the recess and can be joined to the joint portion.
The length of the recess in the depressed direction is the same as the total length of the thickness of the joint portion and the thickness of the joint portion . The bonding portion and the bonding portion, one is a first magnet, and the other is bondable magnetic member and the first magnet, Exhaust Fan cover according to claim 1, wherein. The joint is fitted inside the recess and
The magnetic material is a second magnet and is
The first magnet and the second magnet have the same shape in the direction in which the ventilation fan cover is attached to the ventilation fan frame, and the shapes are inconsistent when rotated by 180 ° up and down. , The ventilation fan cover according to claim 2. A ventilation fan cover attached to a ventilation fan frame in which one of the fixing means is installed on at least a part of the surface thereof.
A ventilation fan cover main body having a recess formed in a position corresponding to one of the fixing means when attached to the ventilation fan frame in a direction opposite to the ventilation fan frame from the surface thereof.
With the other of the fixing means that can be installed in the recess,
By joining one of the fixing means to the other, it can be detachably fixed to the ventilation fan frame in a contact state .
The fixing means has a joint portion that can be installed on the surface of the ventilation fan frame at a position corresponding to the recess of the ventilation fan cover main body.
Including a joint portion that is installed in the recess and can be joined to the joint portion.
The length of the recess in the depressed direction is the same as the total length of the thickness of the joint portion and the thickness of the joint portion . The ventilation fan cover according to any one of claims 1 to 4 , wherein the ventilation fan cover main body is made of polyvinyl chloride.

Images