JPH0510928U - Exhaust fan with filter - Google Patents

Abstract

(57) [Abstract] [Purpose] To provide a ventilation fan with a filter that prevents an elastic piece from being inadvertently removed from the decorative frame even if the elastic piece for attaching the lower part of the filter body to the decorative frame is deformed. [Structure] Hanging hole 26 formed in the upper part of filter body 18
Is held by the hooking piece 22 on the upper part of the decorative frame 16. Further, the elastic piece 27 projecting from the lower portion of the filter body 18 is inserted into the insertion hole 23 in the lower portion of the decorative frame 16, and the engaging hole 28 of the elastic piece 27 is engaged and held by the engaging protrusion 25. When the rib 29 having a required height is projected downward on the elastic piece 27 and the elastic piece 27 is deformed so as to be inclined downward, the rib 29 comes into contact with the lower surface of the insertion hole 23 and the elastic piece 27. Is pushed upward to deepen the degree of engagement of the engagement hole with the engagement protrusion.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a ventilation fan with a filter in which a filter body is detachably attached to the front surface of a decorative frame.

[0002]

[Prior Art]

 A typical ventilation fan used in the kitchen, etc. consists of a main body and a decorative frame that is detachably attached to the indoor front surface of the main body.A fan motor with a fan attached is installed inside the main body. In addition, a bell mouth that surrounds the fan is installed in the decorative frame.

The filter-equipped ventilation fan is configured such that a filter body is detachably attached to the front surface of the decorative frame of the above-described ordinary ventilation fan. FIG. 9 shows an example of the mounting structure of the filter body in this ventilation fan with filter. Note that this mounting structure is not publicly known.

In FIG. 9, an inverted L-shaped hooking piece 2 is formed as a receiving portion in the upper part of the front surface of the decorative frame 1, and an insertion hole 3 is formed in the lower part. A projecting piece 4 projects rearward from the upper opening edge of the insertion hole 3, and an engaging projecting part 5 projects downward on the projecting piece 4. On the other hand, a hooking hole 8 as a hooking portion is formed in the upper portion of the outer frame 7 of the filter body 6, and an elastic piece 9 is provided in the lower portion so as to project rearward. An engaging hole 10 is formed in the elastic piece 9.

To attach the filter body 6, first, the upper hooking hole 8 is hooked and held on the hooking piece 2 from above, and then the lower elastic piece 9 is inserted into the insertion hole 3. Then, the engaging hole 10 of the elastic piece 9 elastically engages with the engaging protrusion 5 as shown by the solid line in FIG. 9, and the filter body 6 is attached to the front surface portion of the decorative frame 1 as described above. ..

As described above, the filter body 6 attached to the decorative frame 1 captures oil dust and the like from the air discharged outdoors by the ventilation operation. When the filter body 6 becomes extremely dirty as a result of capturing the oil dust, the filter body 6 is removed from the decorative frame 1 and replaced with a new filter body.

[0007]

[Problems to be solved by the device]

 As described above, the filter body 6 is of a so-called disposable type, and therefore the outer frame 7 is not so sturdy. Therefore, while the filter body 6 is being stored for replacement, the outer frame 7 is deformed, or the elastic piece 9 protruding from the outer frame 7 is exposed outside (as shown by the two-dot chain line in FIG. 9). It may be deformed so that it tilts downward.

Then, when the filter body 6 in which the elastic piece 9 is deformed outward is attached to the decorative frame 1, the engaging hole 10 of the elastic piece 9 is engaged with the engaging projection as shown by the chain double-dashed line in FIG. 5 may not be engaged, or a small amount of catch may be obtained even if engaged, resulting in a problem that the attachment of the lower portion of the filter body 6 is incomplete.

The present invention has been made in view of the above circumstances, and an object thereof is to make it possible to increase the degree of engagement with the engaging protrusions even if the elastic piece of the filter body is deformed. The purpose of this is to provide a ventilation fan with a filter that can prevent accidental disengagement.

[0010]

[Means for Solving the Problems]

 The ventilation fan with a filter according to the present invention is such that a filter body integrally provided with a sheet-like filter inside the outer frame is detachably attached to a decorative frame provided on the indoor front side of the main body, wherein the front surface of the decorative frame is The receiving part is formed on the upper part of the part, the insertion hole is formed on the lower part, and the engaging projection is located downwardly on the upper part of the rear side of the insertion hole, and the engaging projection is projected downward. The upper part is formed with a hanging part that is held by the receiving part from above, and the lower part is provided with an elastic piece which is inserted into the insertion hole so as to project rearward, and the engaging projection is attached to the elastic piece. And a rib of a required height extending in the front-rear direction is provided on the elastic piece so as to project downward.

[0011]

[Action]

 When the elastic piece of the filter body is deformed outward, when the elastic piece is inserted into the insertion hole of the decorative frame, the rib projecting downward on the elastic piece comes into sliding contact with the lower surface of the opening of the insertion hole. For this reason, the elastic piece is pushed up by the height of the rib, so that the engagement degree of the engagement hole with respect to the engagement protrusion is increased.

[0012]

【Example】

 An embodiment of the present invention will be described below with reference to FIGS. 1 to 8 by applying it to a ventilation fan with a kitchen filter.

First, in FIGS. 2 and 3 showing the entire structure of the ventilation fan with a filter, the main body 11 is formed of a metal plate material in a rectangular tube shape. A fan motor 12 is mounted inside the main body 11 via a mounting frame 13, and a fan 14 is detachably attached to a rotation shaft (not shown) of the fan motor 12. Further, a shutter 15 which is opened by receiving wind pressure is pivotally attached to the outside of the main body 11.

A decorative frame 16 made of plastic is removably attached to the front surface of the main body 11 on the indoor side by a well-known elastic engaging means, and a bell mouth 17 surrounding the fan 14 is attached to the decorative frame 16. It is integrally formed. A filter body 18 is detachably attached to the front surface of the decorative frame 16. At the center of the lower part of the front surface of the decorative frame 16, there is formed a recess 16a for putting fingers on the filter body 18 when the filter body 18 is removed.

The filter body 18 is composed of a rectangular outer frame 19 and a sheet-shaped filter 20 provided inside the outer frame 19. Of these, the outer frame 19 is made of, for example, ABS resin, and the sheet filter 20 is made of, for example, a nonwoven fabric made of polypropylene fiber. The outer frame 19 and the sheet filter 20 are integrated, and in the case of this embodiment, the sheet filter 20 is attached to a mold (not shown) for molding the outer frame 19. By arranging and injecting resin into the molding die in this state to mold the outer frame 19, the peripheral portion of the sheet-shaped filter 20 is embedded in the outer frame 19 to integrate them. That is, so-called insert molding is used. An oil sump portion 19a is formed at the lower end of the outer frame 19 to store the oil attached to the sheet-shaped filter 20 when it reaches the outer frame 19.

On the back side of the filter body 18 as described above, a support bar 21 made of plastic is provided in an inclined shape so as to be located on a diagonal line. The supporting bar 21 is formed separately from the filter body 18, and both ends thereof are detachably attached to the outer frame 19. As shown in FIG. 2, the supporting bars 21 are bent in an arc shape so as to be convex toward the front inside the room, whereby the supporting bars 21 are attached to the sheet-shaped filter 20. The sheet-shaped filter 20 is pressed so as to project from the back side to the indoor side with respect to the outer frame 19.

Here, a mounting structure of the filter body 18 to the decorative frame 16 will be described. In other words, as shown in FIG. 1, a substantially inverted L-shaped hooking piece 22 as a receiving portion is provided on the upper part of the front surface of the decorative frame 16 at both left and right sides thereof. .. In addition, insertion holes 23 are formed in the lower part of the front surface of the decorative frame 16 at both left and right sides thereof. A projecting piece 24 is projected rearward at the upper edge of the insertion hole 23, and a tapered engagement projection 25 is projected downwardly on the projecting piece 24. Therefore, the engaging projection 25 is located on the upper rear side of the insertion hole 23.

On the other hand, on the upper part of the outer frame 19 of the filter body 18, there are formed hanging holes 26 as hanging parts located on both left and right sides of the upper surface of the peripheral wall 19b. Further, elastic pieces 27 are provided on the lower portion of the outer frame 19 at both left and right sides of the rear surface of the front portion. The elastic piece 27 projects relatively longer to the rear side than the rear end of the outer frame 19, and an engaging hole 28 is formed in a portion projecting from the outer frame 19. As shown in FIG. 4, a rib 29 having a required height extending in the front-rear direction is provided on the side edge of the elastic piece 27 (only one is shown) so as to project downward, and the rear end of the rib 29 is provided. The part is formed as an inclined surface 29a.

In the above structure, in order to attach the filter body 18 to the decorative frame 16, first, as shown by the chain double-dashed line in FIG. 1, the filter body 18 is tilted so that the upper hanging hole 26 is hooked on the upper part of the decorative frame 16. The piece 22 is hooked from above. Next, the lower portion of the outer frame 19 is pressed to push the elastic piece 27 into the insertion hole 23 in the lower portion of the decorative frame 16. Then, the elastic piece 27 rides over the front slope portion of the engaging projection 25 of the projecting piece 24 while elastically deforming, and finally the engaging hole 28 engages with the engaging projection 25 as shown by the solid line in FIG. To do. As a result, the elastic piece 27 is prevented from coming off, and the filter body 18 is detachably attached to the decorative frame 16.

To remove the filter body 18, as shown in FIG. 5, put a thumb on the lower front surface of the outer frame 19 of the filter body 18 and insert the remaining four fingers into the concave portion 16a of the decorative frame 16 to remove it. Apply to the back side of the lower edge of the frame 19, and while pushing the outer frame 19 with your thumb, pull the other four fingers toward you. Then, since the lower portion of the outer frame 19 is slightly twisted, the elastic piece 27 tilts downward, and the engaging hole 28 thereof comes out of the engaging projection 25. Therefore, if the lower portion of the outer frame 19 is pulled further toward the front, the elastic piece 27 is elastically deformed so as to pass over the engaging projection 25, and the engaging hole 28 is completely disengaged from the engaging projection 25. The piece 27 is pulled out from the insertion hole 23. Then, when the filter body 18 is pushed up, the hanging hole 26 is disengaged from the hooking piece 22, so that the filter body 18 can be removed from the decorative frame 16.

Now, when the filter body 18 is mounted as described above, considering that the ventilation fan is generally installed at a high place when the upper hooking hole 26 is hooked on the hooking piece 22, the hooking hole 26 It is practically difficult to confirm that the hook and the hook 22 are securely fitted. Therefore, the hooking hole 26 is not fitted in the hooking piece 22, and, for example, the engaging hole 28 of the elastic piece 27 is projected only when the upper surface of the peripheral wall 19b is placed on the upper end of the hooking piece 22. If the engaging projection 25 of 24 is engaged, the upper portion of the outer frame 19 may be disengaged from the hooking piece 22 due to, for example, vibration during ventilation operation.

However, since the lower elastic piece 27 is inserted from the insertion hole 23 and the engaging hole 28 is engaged with the engaging projection 25 of the projecting piece 24, whether the upper part of the outer frame 19 is the hooking piece 22 or not. When separated, the rib 29 of the elastic piece 27 is received by the lower surface of the opening of the insertion hole 23, as shown in FIG. Then, the filter body 18 is rotated so as to be tilted forward, the elastic piece 27 is turned upward, and the engaging hole 28 thereof is engaged more deeply with the engaging projection 25, and The rear end of the lower surface of the peripheral wall 19b of the frame 19 comes into contact with the front surface of the decorative frame 16. For this reason, as shown in FIG. 7, the filter body 16 remains supported in the forward tilted state, and there is no risk of falling off from the decorative frame 16, which is safe.

By the way, it is assumed that the elastic piece 9 projecting from the outer frame 7 is deformed so as to be inclined outward (downward) while the filter body 18 is stored for replacement. When attaching the filter body 18 as described above, when the elastic piece 27 is inserted into the insertion hole 23 after the upper hooking hole 26 is hooked on the hooking piece 22, the inclined surface 29a of the rib 29 is inserted into the insertion hole 23 first. The lower end surface of the rib 29 rides on the lower surface of the opening of the insertion hole 23 by sliding contact with the lower surface of the opening and the guiding action of the inclined surface 29a. Therefore, the elastic piece 27 is pushed upward by an amount corresponding to the protruding height of the rib 29, and as a result, the engagement hole 28 is deeply engaged with the engagement protrusion 25. Therefore, the engagement of the elastic piece 27 with the engagement protrusion 25 becomes more reliable, and accidental disengagement can be more reliably prevented.

The present invention is not limited to the embodiment described above and shown in the drawings. For example, a support bar for pressing the sheet-shaped filter 20 of the filter body so as to project forward may be omitted. Further, the receiving portion of the decorative frame 16 may be used as a hanging hole, and the hanging portion of the outer frame 19 of the filter body 18 may be used as a hooking piece, so that various modifications can be made without departing from the spirit of the invention.

[0025]

[Effect of the device]

 As described above, according to the ventilation fan with a filter of the present invention, the elastic piece of the filter body is deformed to the outside because the rib of the required height extending in the front-rear direction is projected downward on the elastic piece of the filter body. In this case, when the elastic piece is inserted into the insertion hole of the decorative frame, the rib slides on the lower surface of the opening of the insertion hole and pushes up the elastic piece. It is possible to obtain an excellent effect that the degree can be increased and the engagement of the elastic piece is not inadvertently disengaged.

[Brief description of drawings]

FIG. 1 is a vertical sectional side view of an essential part showing an embodiment of the present invention.

FIG. 2 is a vertical sectional side view showing the overall configuration.

FIG. 3 is an exploded perspective view

FIG. 4 is an enlarged perspective view of one elastic piece.

FIG. 5 is a vertical cross-sectional side view for explaining the operation when removing the filter body.

FIG. 6 is an enlarged vertical sectional side view of an elastic piece portion when the upper part of the filter body is removed from the decorative frame.

FIG. 7 is a vertical cross-sectional side view of the main part when the upper part of the filter body is removed from the decorative frame.

FIG. 8 is an enlarged vertical cross-sectional side view of the elastic piece portion for explaining the operation when the elastic piece is deformed outward.

FIG. 9 is a view corresponding to FIG. 1 for explaining a defect of a mounting structure of a filter body which is considered recently.

[Explanation of symbols]

Reference numeral 11 is a main body, 14 is a fan, 16 is a decorative frame, 18 is a filter body, 19 is an outer frame, 20 is a sheet-like filter, 22 is a hooking piece (receiving portion), 23 is an insertion hole, 25 is an engaging protrusion, 2
6 is a hanging hole (hooking part), 27 is an elastic piece, 28 is an engaging hole,
29 is a rib.

Claims (1)

[Scope of utility model registration request] 1. A filter body having a sheet-like filter integrally provided inside an outer frame, which is detachably attached to a decorative frame provided on the indoor side front surface of the main body, wherein an upper part of the front surface of the decorative frame is provided. A receiving part is formed in the lower part, an insertion hole is formed in the lower part, and an engaging projection is provided downwardly on the rear upper part of the inserting hole, while the receiving part is formed in the upper part of the outer frame of the filter body. A hooking portion that is held by a hook from above is formed, and an elastic piece that is inserted into the insertion hole is provided on the lower portion so as to project rearward, and the elastic piece engages with the engaging protrusion. A ventilation fan with a filter, characterized in that a hole is formed and a rib of a required height extending in the front-rear direction is provided on the elastic piece so as to project downward.