JP2018189301A - Ventilator cover - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a ventilator cover capable of being easily attached.SOLUTION: A ventilator cover 1 includes a ventilator cover main body 2 attached to a ventilator frame 81, and provided with a recessed portion 9 in a direction opposite to the ventilator frame 81, and fixing means (first magnet 10 disposed inside of recessed portion 9 and second magnet 11 disposed on ventilator frame 81) disposed inside of the recessed portion 9 and detachably fixing the ventilator frame 81 and the ventilator cover main body 2 in a contact state. As the fixing means is housed in the recessed portion in the fixing state, attachment of the ventilator cover can be simplified, and an attaching state can be stabilized.SELECTED DRAWING: Figure 3

Description

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

  FIG. 7 is a schematic perspective view showing a state in which a conventional ventilation fan cover is attached to a 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 consists of the ventilation fan cover main body 72 which is the aluminum foil molded object to which the filter 73 which consists of a nonwoven fabric was attached in the center part. Engaging portions 74 are formed on opposite side portions of the ventilation fan cover main body 72. The engaging portion 74 is formed with a mounting hole 77 for mounting a hook portion 88 described later. Moreover, the ventilation fan cover main body 72 is provided with the downward extension part 75 connected to the downward direction and extended. The lower extension 75 is formed with ruled lines 76a, 76b extending in the left-right direction when the filter 73 is viewed from the front, and the lower extension 75 can be bent along the ruled lines 76a, 76b.

  The ventilation fan frame 81 is detachably attached to the wall 90, and includes a front part 83 that supports the periphery of the suction port 82, a side wall 84 that is connected to the four ends of the front part 83 and extends toward the wall 90, It comprises a coil spring 85 having one end 86 attached to the side wall 84 in a detachable manner. A hook portion 88 is formed at the other end portion 87 of the coil spring 85. Patent Document 1 discloses a technique related to a fitting for a ventilation fan cover using such a coil spring or the like.

  When attaching the ventilation fan cover 71, for example, the ventilation fan frame 81 is first removed from the wall 90, and a pair of thin plate pieces 79 are attached so as to sandwich the opposing side wall 84 ends of the removed ventilation fan frame 81. A coil spring 85 is attached to the end. Next, after overlapping the upper end portion 78 of the ventilation fan cover 71 along the upper side wall 89 of the ventilation fan frame 81 as shown in (1) of FIG. 7, the one-dot chain line arrow of (1) of FIG. As shown, 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 attachment hole 77. Then, the lower extension 75 is bent toward the ventilation fan frame 81 along the ruled lines 76 a and 76 b to cover the lower side wall 80 of the ventilation fan frame 81. In this manner, 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.

  Further, when the filter 73 becomes dirty with 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.

JP-A-9-79626

  However, the conventional ventilation fan cover 71 as described above is troublesome because it is necessary to first remove the ventilation fan frame 81 from the wall 90 when being attached to the ventilation fan frame 81. Further, the ventilation fan frame 81 is often mounted at a high place, and in that case, the side wall 84 of the ventilation fan frame 81, which is a work location, is difficult to visually recognize, and it is necessary to prepare a scaffold. It was. Therefore, there has been a demand for a ventilation fan cover that can be more easily attached.

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

  In order to achieve the above object, the invention described in claim 1 is a ventilation fan cover attached to a ventilation fan frame, the ventilation fan cover main body having a recess formed in a direction opposite to the ventilation fan frame, and provided inside the recess. And a fixing means capable of fixing the ventilation fan frame and the ventilation fan cover main body in a detachable contact state.

  If comprised in this way, a fixing means will be stored in a crevice in a fixed state.

  According to a second aspect of the present invention, in the configuration of the first aspect of the present invention, the fixing means is installed in the concave portion of the ventilator fan frame at a position corresponding to the concave portion of the ventilation fan cover main body, and the concave portion. And a bonded portion that can be bonded to the bonded portion.

  If comprised in this way, a ventilation fan cover will be fixed to a ventilation fan frame by installing a junction part in a ventilation fan frame, installing a to-be-joined part in a ventilation fan cover, and attaching a ventilation fan cover to a ventilation fan frame.

  According to a third aspect of the present invention, in the configuration of the second aspect of the present invention, one of the joining portion and the joined portion is a first magnet and the other is a magnetic body that can be joined to the first magnet. It is.

  If comprised in this way, fixation with respect to the ventilation fan frame of a ventilation fan cover will be based on a magnetic force.

  According to a fourth aspect of the present invention, in the configuration of the third aspect of the present invention, the joint portion fits into the recess, the magnetic body is the second magnet, and the first magnet and the second magnet. Are the same shape as each other when viewed from the direction in which the ventilation fan cover is attached to the ventilation fan frame, and are inconsistent when the shape is rotated 180 degrees up and down.

  Such a configuration suggests a direction to be attached to the first magnet and the second magnet.

  The invention according to claim 5 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 is attached to a position corresponding to one of the fixing means when attached to the ventilation fan frame. Equipped with a ventilation fan cover body with a recess formed in the opposite direction to the ventilation fan frame and the other fixing means that can be installed in the recess, and one of the fixing means is joined to the other so that it can be attached to and removed from the ventilation fan frame. It can be fixed to the contact state.

  If comprised in this way, a ventilation fan cover can be attached to a ventilation fan frame by fixing the other of a fixing means to a ventilation fan cover, and making it join to a ventilation fan frame.

  The invention according to claim 6 is the structure of the invention according to any one of claims 1 to 5, wherein the ventilation fan cover main body is made of polyvinyl chloride.

  If comprised in this way, it will become a flame-retardant ventilation fan cover.

  As described above, according to the first aspect of the present invention, since the fixing means is housed in the recess in the fixed state, the attachment of the ventilation fan cover is simplified and the attachment state is stabilized.

  In addition to the effect of the invention of claim 1, the invention described in claim 2 is provided with a ventilating fan cover by installing a joint part on the ventilation fan frame, installing a joined part on the ventilation fan cover, and attaching the ventilation fan cover to the ventilation fan frame. Since it is fixed to the ventilation fan frame, it is easy to attach the ventilation fan cover.

  In addition to the effect of the invention of claim 2, the invention of claim 3 is because the fixing of the ventilation fan cover to the ventilation fan frame is due to magnetic force, so that performance deterioration due to use over time is reduced and long-term stability is improved. .

  In order to suggest the direction which should be attached about the 1st magnet and the 2nd magnet in addition to the effect of the invention of Claim 3, since the invention of claim 4 suggests the direction which should be attached about the 1st magnet and the ventilation fan cover, Misalignment of the second magnet is prevented.

  According to the fifth aspect of the present invention, the other of the fixing means is fixed to the ventilation fan cover and joined to the ventilation fan frame, so that the ventilation fan cover can be attached to the ventilation fan frame.

  In addition to the effect of the invention according to any one of claims 1 to 5, the invention described in claim 6 is a flame retardant ventilation fan cover, and is therefore suitable for a ventilation fan that reaches a high temperature. Can be used for

It is a front view which shows the whole ventilation fan cover shape by 1st Embodiment of this invention. It is a right view which shows the mode before and behind attachment with respect to the ventilation fan frame of the ventilation fan cover shown in FIG. 1, Comprising: (1) is a state before attachment and (2) is an attachment state. It is a general | schematic expanded sectional view of the X section shown in FIG. 2, Comprising: (1) is the state before attachment, (2) is an attachment state. It is a front view which shows the whole shape of the ventilation fan cover by 2nd Embodiment of this invention, and respond | corresponds to FIG. It is a right view which shows the mode before and behind attachment with respect to the ventilation fan frame of the ventilation fan cover shown in FIG. 4, Comprising: It corresponds to FIG. 2, (1) is the state before attachment, (2) is the attachment state It is. It is a general | schematic expanded sectional view of Y part shown in FIG. 5, Comprising: It corresponds to FIG. 3, (1) is a state before attachment, (2) is an attachment state. FIG. 7 is a schematic perspective view showing a state in which a conventional ventilation fan cover is attached to a 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 the ventilation fan cover shown in FIG. 1 is attached to the ventilation fan frame. (1) is the state before installation, and (2) is the installation state.

  In the present specification, the up / down / left / right direction means the up / down / left / right direction in the front direction (direction in which the ventilation fan cover is attached to the ventilation fan frame) as shown in FIG. The forward 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, a ventilation fan cover 1 has a substantially rectangular shape in a front view, and includes a ventilation fan cover body 2 to which a filter 3 made of a nonwoven fabric is attached at the center thereof. The ventilation fan cover 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, the outer peripheral edge of the ventilation fan cover main body 2 is connected to the outer peripheral edge of the extension fan 7 (left extension part 7a, upper extension part 7b, right extension part 7c, etc.) connected via bendable ruled lines 6a to 6d. A downward extension 7d) is formed. Further, a ruled line 6e extending so as to cross in the left-right direction is further formed in the downward extension portion 7d. The effect of the extension will be described later.

  Moreover, the ventilation fan cover main body 2 is formed with recesses 9a to 9d which are recessed at the four corners in the opposite direction (forward direction) to the ventilation fan frame (not shown) based on the attached state. Referring also to (1) in FIG. 2, a vertically long rectangular sheet-like first magnet 10b as one of the fixing means is provided in the recess 9b using a double-sided tape, and similarly A first magnet 10c is provided inside the recess 9c, and each of the first magnets 10a, 10d is also provided inside each of the recesses 9a, 9d shown in FIG. Further, referring to (2) of FIG. 2, in the attached state, at positions corresponding to each of the first magnets 10b and 10c on the surface of the ventilation fan frame 81 (at least one of the first magnet and the second magnet in the front view). Each of the second magnets 11a and 11b is previously installed with a double-sided tape at a position where a part thereof overlaps. Therefore, as indicated by the one-dot chain line arrow in FIG. 2, the ventilation fan cover 1 is brought close 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 each other. Can be attached detachably. After the ventilation fan cover 1 is attached, the upper extension portion 7b and the lower extension portion 7d are 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 folded. It can be attached to cover at least a part. As described above, the lower extension 7d is formed with the ruled line 6e extending so as to cross in the left-right direction, so that the ventilation fan cover 1 can be 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 a portion X shown in FIG. 2, wherein (1) is a state before attachment, and (2) is an attachment state.

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

3 (2), the recessed portion 9b has a recessed direction length D ₁ , in other words, from the back surface 12 (the surface in the direction of the ventilation fan frame 81) of the recess 9b to the front surface 13 (the ventilation fan cover 1) of the ventilation fan frame 81. 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} (D ₁ = D ₂ + D ₃ ). By this, in the case of a ventilation fan cover that does not have a recess, the ventilation fan cover body may float up to the ventilation fan frame by the thickness of the fixing means, and there is a risk that air will flow into the suction port without passing through the filter, The ventilating fan cover 1 of the present invention can fix the ventilating fan frame 81 and the ventilating fan cover main body 2 in contact with each other 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. This reduces the risk of inadvertent dropping and improves the stability of the mounting state.

  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 concave fan 9 are provided, and the ventilation fan frame 81 and the ventilation fan cover main body 2 are fixed in a detachable contact state. A ventilating fan cover structure 15 including a fixing means (first magnet 10 and second magnet 11) that can be configured and a ventilation fan frame 81 is configured. Thus, 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 from the suction port (not shown).

  As described above, the ventilation fan cover 1 can be attached to the ventilation fan frame 81 by the fixing means (the first magnet 10 and the second magnet 11), and in that case, the fixing means (the first magnet 10 and the second magnet 10). By providing the magnet 11) in 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 attachment of the ventilation fan cover is simplified and the attachment state is stabilized.

  Here, the ventilation fan frame may be formed with a protrusion protruding in the direction of the ventilation fan cover on the basis of the attached state. If the protrusions are not very small and cannot be absorbed by the bending of the ventilation fan cover body, there is a possibility that the attachment of the ventilation fan cover may be hindered. 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 entire shape of the ventilation fan cover according to the second embodiment of the present invention, and corresponds to FIG. 5 is a right side view showing the state of the ventilation fan cover shown in FIG. 4 before and after being attached to the ventilation fan frame, corresponding to FIG. 2, and (1) is a state before installation. 2) is an attached state. FIG. 6 is a schematic enlarged cross-sectional view of the Y portion shown in FIG. 5 and corresponds to FIG. 3, wherein (1) is a state before mounting and (2) is a mounting state.

  Since the basic structure 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 following description will focus on the differences.

  With reference to these drawings, convex portions 29a to 29d are formed in the four corners of the ventilation fan cover main body 22 in the direction of the ventilation fan frame 61 (rear direction) with reference to the attached state. In addition, each of the first magnets 30a to 30d is installed on the surface of the tip of each of the convex portions 29a to 29d using a double-sided tape.

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

6 (2), the length D ₄ from the ventilation fan cover body 22 to the ventilation fan frame 61, that is, the length of the projection 29b in the protruding direction (from the back surface 32 of the ventilation fan cover body 22 to the projection). length) _{D 5} to the surface of the 29 b, the first in the projecting direction of the magnet 30b length _{D 6,} and the total length of the second in the projecting direction of the magnet 31a length _{D 7 (D} 4 = _{D 5} + D ₆ + D ₇ ) is set 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 contacts the back surface 32 of the ventilation fan cover body 22 is reduced. As described above, in the case of the ventilation fan cover that does not have the convex portion, there is a possibility that the attachment may be disturbed due to contact with the protrusion 62, but the ventilation fan cover 21 includes the convex portion 29, thereby It can be detachably fixed so as to be lifted with respect to 61.

  The ventilation fan cover 21 is connected to the entire outer periphery of the ventilation fan cover main body 22 and is attached to an extension 27 (for example, shown in (2) of FIG. 6) that can cover the side wall (for example, the upper side wall 63) of the ventilation fan frame 61. An upper extension 27b) covering the upper side wall 63 in the state. Therefore, the possibility that air flows into a suction port (not shown) without passing through the filter 23 of the ventilation fan cover 21 is reduced.

  Thus, the ventilation fan cover main body 22 in which the convex part 29 is formed in the direction of the ventilation fan frame 61 and the convex part 29 are provided, and the ventilation fan frame 61 and the ventilation fan cover main body 22 can be detachably fixed. A ventilation fan cover structure 35 comprising fixing means (first magnet 30 and second magnet 31) and an extension 27 connected to the entire outer periphery of the ventilation fan cover body 22 and covering the side wall of the ventilation fan frame 61. Is configured. Thus, the ventilation fan cover is simply attached to the ventilation fan frame on which the protrusions are formed, and the filter of the ventilation fan cover filters the air flowing from the suction port (not shown).

  As described above, in the ventilation fan cover 21, since the ventilation fan cover 21 can be attached to the ventilation fan frame 61 by the fixing means (the first magnet 30 and the second magnet 31), the attachment of the ventilation fan cover is simple. become. Further, even when the projection 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 compatibility of the model with the ventilation fan frame is improved. Furthermore, when the fixing means is a sheet-like first magnet and a second magnet, and these are provided so as to be fitted inside the recess, if the installation direction is different, the bonding is not performed at an accurate position. However, in the ventilation fan cover 21, the attachment can be completed even if there is a slight misalignment, and the allowable range related to the misalignment increases, so the direction of the first magnet and the second magnet The need for decisions 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 a ventilation fan frame.

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

  Further, in each of the above embodiments, the ventilating fan cover main body is formed with a foldable ruled line, and is flat before mounting, but the ends of adjacent extension portions that are bent before mounting are connected to each other. May be. Further, the ruled line need not be formed.

  Furthermore, in the first embodiment, the extension is formed, but one or all of the extensions may not be formed.

  Furthermore, in each said embodiment, although the ventilation fan cover main body was a specific shape, another shape may be sufficient.

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

  Further, in each of the above embodiments, the second magnet is installed in advance on the surface of the ventilation fan frame before installation, but other attachment methods may be used. For example, the second magnet is attached to the ventilation fan frame side of the first magnet, and a double-sided tape is affixed to the ventilation fan frame side of the second magnet, and the second fan is attached at the same time when the ventilation fan cover is attached to the ventilation fan frame. A method of installing a magnet on the surface of the ventilation fan frame may 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 frame at a position corresponding to the concave or convex portion of the ventilation fan cover body, and the other fixing means is installed on the concave or convex portion It is good also as a to-be-joined part which can be joined to a junction part while being done. By comprising in this way, a joining part is installed in a ventilation fan frame, a to-be-joined part is installed in a ventilation fan cover, and a ventilation fan cover is fixed to a ventilation fan frame by attaching a ventilation fan cover to a ventilation fan frame. Therefore, the attachment of the ventilation fan cover is simplified, and it is equally easy to remove the ventilation fan cover while maintaining the state where the joint portion is installed on the ventilation fan frame and to replace it without the necessity of positioning the joint portion.

  Further, in each of the above-described embodiments, the first magnet is used as the joined portion (one of the fixing means), and the second magnet is used as the joining portion (the other of the fixing means). Instead of this magnet, another magnetic body such as an iron plate may be used. Further, the positional relationship between the first magnet and the magnetic body may be interchanged.

  In addition, it is preferable that one of the above-described joining portion and the joined portion is a first magnet and the other is a magnetic body that can be joined to the first magnet. By comprising in this way, since fixation with respect to the ventilation fan frame of a ventilation fan cover will be based on a magnetic force, the performance degradation by use over time will be reduced and long-term stability will improve.

  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, a pentagonal shape having the same shape in a direction view (front view) in which the ventilation fan cover is attached to the ventilation fan frame and a shape that is inconsistent when the shape is rotated up and down by 180 ° may be used. By constructing in this way, in order to suggest the direction to be attached to the first magnet and the second magnet, it is possible to prevent displacement of the first magnet and the second magnet when the ventilation fan cover is installed. it can.

  Further, in each of the above-described embodiments, the first magnet is installed so as to be fitted with the double-sided tape with respect to the surface inside the concave portion, but may not be installed so as to be fitted. For example, the concave portion may be formed larger than the first magnet or the second magnet. Further, the installation means is not limited to the double-sided tape, and other physical or chemical methods may be used. For example, a method using an adhesive, a method of fixing a position by forming a protrusion around the installation location, and a first magnet getting over the protrusion, and the like. From the viewpoint of facilitating replacement of the ventilation fan cover, as in the first embodiment, the fixing strength of the first magnet (joined part) with respect to the ventilation fan cover and the second magnet (joint part) with respect to the ventilation fan frame. It is preferable that the fixed strength of is stronger than the force that the first magnet and the second magnet attract (bonding strength by the bonded portion and the bonded portion).

Further, in the above first embodiment, the recess direction length is set so that D ₁ = D ₂ + D ₃ shown in FIG. 3, but if the ventilation fan cover can be attached, The dimensional relationship (D ₁ > D ₂ + D ₃ ) may be sufficient that the first magnet and the second magnet are separated to such an extent that a magnetic force is generated. In addition, when the first magnet and the second magnet are thicker or when the surface of the ventilation fan frame is uneven, the relationship is such that the ventilation fan cover is separated from the ventilation fan frame (D ₁ <D ₂ + D ₃ ). These cases may be included in the contact state as long as the air substantially flowing into the suction port is set to be filtered by the filter.

  Furthermore, in each of the above-described embodiments, a plurality of concave portions or convex portions are formed. However, at least one concave portion is sufficient, and the position, range, and size can be appropriately changed.

  Furthermore, in the second embodiment described above, the projection is formed on the ventilation fan frame, but the ventilation fan cover can be similarly attached to the ventilation fan frame on which the projection is not formed.

  Furthermore, in the second embodiment described above, in the mounted state, the total length in the protruding direction of the protrusion and the fixing means is set to exceed the length in the protruding direction of the protrusion. Even if it is not made, if it has a convex part, the possibility that the attachment of the ventilation fan cover will be hindered by the protrusion is reduced.

  Furthermore, 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 contact between the ventilation fan cover body and the projection of the ventilation fan frame is avoided. However, the possibility that the function of the ventilator cover may be hindered by the protrusions being raised by the protrusions with respect to the ventilator frame may be solved by other methods. For example, forming a plurality of ruled lines that can be bent so that the ventilation fan cover body does not come into contact with the projection, and forming a concave recess in the opposite direction to the ventilation fan frame at a position corresponding to the projection on the ventilation fan cover. For example, forming the cover, forming an opening at the position, forming a cross-shaped cut at the position, and the like.

  Furthermore, in each of the above-described embodiments, the extension portion covers the upper side wall and the like of the ventilation fan frame. However, the term “covering the side wall” does not need to cover the entire side wall, and air flowing into the suction port during use. It is sufficient to cover the surface around the suction port of the ventilation fan frame so that it substantially passes through the filter.For example, the ventilation fan cover is in contact only with a corner portion which is a connection portion between a specific side wall and the adjacent side wall. The case where the side wall is not included is also included.

DESCRIPTION OF SYMBOLS 1, 21 ... Ventilation fan cover 2, 22 ... Ventilation fan cover main body 7, 27 ... Extension part 9 ... Concave part 10, 30 ... 1st magnet 11, 31 ... 2nd magnet 29 ... Convex part 61, 81 ... Ventilation fan frame 62 ... Projection 63, 89... Upper side wall 64, 80... Lower side wall The same reference numerals in the drawings indicate the same or corresponding parts.

Claims (6)

A ventilation fan cover attached to the ventilation fan frame,
A ventilation fan cover body having a recess formed in a direction opposite to the ventilation fan frame;
A ventilation fan cover provided with 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. The fixing means can be installed on the surface of the ventilation fan frame at a position corresponding to the concave portion of the ventilation fan cover body; and
The ventilating fan cover according to claim 1, further comprising a joined portion that is installed in the concave portion and can be joined to the joined portion.   The ventilating fan cover according to claim 2, wherein one of the joined portion and the joined portion is a first magnet and the other is a magnetic body that can be joined to the first magnet. The joint is fitted into the recess,
The magnetic body is a second magnet,
The first magnet and the second magnet have the same shape as viewed from the direction in which the ventilation fan cover is attached to the ventilation fan frame, and are inconsistent when the shape is rotated 180 degrees up and down. The ventilation fan cover according to claim 3. 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,
A ventilation fan cover body in which a recess is formed in a direction opposite to the ventilation fan frame at a position corresponding to one of the fixing means when attached to the ventilation fan frame;
The other of the fixing means that can be installed in the recess,
A ventilation fan cover that can be fixed to the ventilation fan frame in a detachable contact state by joining one and the other of the fixing means.   The ventilation fan cover according to any one of claims 1 to 5, wherein a material of the ventilation fan cover main body is polyvinyl chloride.

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