JP2003071224A - Filter unit - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a filter unit which does not use screws for fixing a panel, can easily replace a filter, and improves work properties eminently. SOLUTION: This filter unit 1 is composed of a filter body 3 formed integrally by protruding a panel part 3b with lots of slit holes 3c formed by the thickness of the filter 6 in the front direction from a frame part 3a to be fitted to an opening part 2a formed in a boxy body 2 and the filter 6. In the filter body 3, an insertion part 3d is formed by opening the upper side of the panel part 3b, and the inserted filter 6 is fitted to a resin frame body by inserting into the insertion part 3d.

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a filter mounting structure for a filter unit for ventilating the inside of a box. 2. Description of the Related Art Conventionally, as shown in FIGS. 3 and 4, a filter unit 11 has a filter housing portion 13 having a front surface and a rear surface opened so that a filter 16 can be housed therein.
a, a main body 13 having a frame portion 13b stretched around the periphery of the front opening of the filter housing portion 13a, and a panel 14 having a plurality of slit holes 14a for closing the front opening of the filter housing portion 13a of the main body 13. And filter 16
It is composed of The filter 16 was housed in the filter housing 13a of the main body 13 with the panel 14 removed, and then the filter housing 13a was covered with the panel 14, and the four corners were screwed and fixed with knurled screws 15. [0003] However, there is a problem that the knurled screws are lost during work because they are small. In addition, there is a drawback that the panel must be pressed by hand so that the panel does not fall off when the panel is attached or detached, resulting in poor workability. [0004] In view of the above problems, it is an object of the present invention to provide a filter unit which can easily replace a filter without using screws for fixing a panel and greatly improves workability. It is. [0005] In order to achieve the above object, in a filter unit mounted for ventilating the inside of a box, a large number of slits are formed from a frame portion for mounting in an opening formed in the box. The panel with the holes is projected in the front direction by the thickness of the filter and integrally formed,
One of four sides of the panel is opened to form a filter insertion portion, and the filter fitted to the frame is inserted into the insertion portion and mounted. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A filter unit is formed by projecting a panel portion having a large number of slit holes from a frame portion to be attached to an opening formed in a box body by the thickness of the filter in the front direction. And a filter. The main body has an insertion portion formed by opening any one of the four sides of the panel portion, and a filter fitted to the frame is inserted into the insertion portion and mounted. An embodiment of the filter unit according to the present invention will be described with reference to FIGS. 1 and 2. FIG. The filter unit 1 is formed by integrally projecting a panel portion 3b from a frame portion 3a for attachment to an opening 2a formed in a box 2 for accommodating an electric device by a thickness of the filter 6 in a front direction. It is composed of the formed main body 3 and the filter 6. The panel portion 3b is formed with a large number of slit holes 3c, and the upper side of the panel portion 3b is opened to form an insertion portion 3d of the filter 6. The filter 6 is formed slightly smaller than the panel portion 3b, and a frame 7 is provided on the upper side of the filter 6. The frame 7 is made of resin, has a substantially U-shaped cross section, and has fixed claws projecting inward, and a handle 7a is provided at the center of the upper surface. The filter 6 is fitted into the U-shaped portion of the frame body 7 and is not easily removed by a fixing claw. The mounting is completed by inserting the filter 6 into the insertion portion 3d of the main body 3 until the frame 7 comes into contact. The frame 7 is formed slightly larger than the insertion portion 3d so as not to fall into the insertion portion 3d.
When the filter 6 is to be replaced, the filter 6 can be easily replaced simply by holding the handle 7a of the frame 7 and pulling it out, and inserting a new filter 6 into the insertion portion 3d. In the present embodiment, the insertion portion is formed on the upper side of the panel portion of the main body, but any one of the four sides of the panel portion may be used. Further, the mounting position of the filter unit may be the side plate of the box or the top plate. There is no limitation on how to attach the filter unit. Although the frame has a shape in which only the upper side of the filter is fixed, it may have a shape in which it is fixed over the entire periphery of the filter, and the insertion portion of the main body is formed other than in the upper side of the panel portion. In such cases, the shape is not limited, such as providing an engagement means with the main body so that the frame body does not fall off, and can be appropriately changed without departing from the gist of the present invention. In this embodiment, the filter unit is used alone, but a ventilation fan can be attached to the back of the main body. As described above, in the filter unit attached for ventilating the inside of the box, a panel formed with a large number of slit holes from a frame portion for attachment to an opening formed in the box is provided on the front surface. The panel is formed integrally by projecting in the direction by the thickness of the filter, and one of the four sides of the panel is opened to form a filter insertion portion,
By inserting the filter fitted in the frame into the insertion part and mounting it, the panel and the main body are integrally formed, so there is no dropping of the panel, no screws are lost because screws are not used, just replace the filter In this case, there is an excellent effect that replacement can be easily performed and workability can be greatly improved.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is an exploded perspective view showing a filter unit according to the present invention. FIG. 2 is an explanatory view showing a filter mounting method of the filter unit according to the present invention. FIG. 3 is an exploded perspective view showing a conventional filter unit. FIG. 4 is a perspective view showing how a panel of a conventional filter unit is attached. [Description of Signs] 1 Filter unit 2 Box 3 Body 3a Frame 3b Panel 3c Slit hole 3d Insertion section 6 Filter 7 Frame

Claims (1)

Claims: 1. A filter unit mounted for ventilating the inside of a box, wherein a panel formed with a large number of slit holes from a frame for mounting on an opening formed in the box is directed in a front direction. The panel is formed integrally by projecting by the thickness of the filter, and one of the four sides of the panel is opened to form an insertion portion of the filter, and the filter fitted into a frame is inserted into the panel. A filter unit that is inserted into the unit and mounted.