JP2002085926A - Filter - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a filter apparatus allowing easy replacement of dust guard filter and being able to attain reduction of cost and amount of generation of wastes. SOLUTION: In the filter 9 apparatus equipped with a duct 12 communicated with a cooling fan 11 and a dust guard filter 10 provided in a part of a duct 12, the duct 12 is provided a stuck surface part 12a for attaching the dust guard filter 10, plural acicular projection 20 are provided on an attached part 12a, and the dust guard filter 10 is fixed to the projection 20 by hooking.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a filter device to be mounted on an electrophotographic apparatus such as a copying machine or a printer, an air conditioner, an air washer, etc., and more particularly to a filter device capable of replacing a dustproof filter.

[0002]

2. Description of the Related Art In general, there are a variety of electronic devices including a filter device, such as an electrophotographic device, an air conditioner, and an air washer. If the dust filter of such a filter device is used for a certain period of time or more, its dust collection effect will be significantly reduced.
Dustproof filters are often set as replacement parts.

[0003] For example, as shown in FIG.
A technique is known in which a dustproof filter 109 is fixed to a sticking portion 105 provided in a duct 103 of the “01” with a double-sided tape 107 (first technique).

As shown in FIG. 8, a frame 1 made of resin or the like is used.
There is also a technique in which a dustproof filter 109 is attached to or integrally formed as a dustproof filter unit 113 and is replaced in units of the dustproof filter unit 113 (second technique).

Further, as disclosed in Japanese Patent Application Laid-Open No. Hei 7-134522, a technique is known in which a dustproof filter is sandwiched between a duct and an exterior component of an electronic device main body (third technique).

On the other hand, there is a technique of attaching a plurality of dustproof filters integrally attached to a frame to a duct in order to lengthen the replacement cycle of the dustproof filters (fourth technique).

[0007]

However, in the first technique, when replacing the dustproof filter 109, it is necessary to peel off the double-sided tape 107 firmly adhered and re-attach it to the same position. That is, it is necessary to replace the dust filter 10.
9, the cost of parts is reduced, but there is a problem that it is difficult to replace the dustproof filter 109.

Particularly, when the sticking portion 105 to which the dust filter 109 is attached is made of resin, the sticking portion 10
In order to recycle the dustproof filter 5, it is necessary to completely remove the double-sided tape 105 from the surface to which the dustproof filter 5 is attached.
Double-sided tape 1 affixed to something weak like 09
It is difficult to completely remove 07, and recycling cannot be performed easily.

[0009] In the second technique, it is necessary to replace the dustproof filter unit 113 as a unit.
Since not only the frame 09 but also the frame 111 is replaced, there is a problem that the component cost is increased. Further, at the time of replacement, the dustproof filter 109 and the frame body 111 become dust, and there is also a problem that the amount of dust is increased. In particular, when the frame body 111 is made of resin, the resin frame body 111 becomes dust, which is not friendly to the global environment.

Further, in the third technique, a dustproof filter 10 is provided.
9 is only sandwiched between the duct and the exterior parts, and although the parts cost is low and the amount of dust generated is small, it is necessary to properly assemble the dust filter between the duct and the exterior parts. There is a problem that replacement is difficult.

[0011] In particular, the replacement of the dustproof filter can only be replaced by a skilled service person, and even a skilled service person is likely to cause an assembly error.
In this case, dust may enter the machine, and the function of the dust filter may not be obtained.

Further, in the fourth technique, although the replacement cycle is lengthened, there is a problem that the cost of parts is increased because a plurality of frames provided with the dustproof filter are replaced. In particular, at the time of replacement, it is necessary to replace a large amount of the frame body to which the dust filter is attached, so that dust increases.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a filter device in which a dust-proof filter has good exchangeability and can reduce the cost and the amount of dust generated.

[0014]

According to a first aspect of the present invention, there is provided a filter device comprising a flow passage communicating with a blower and a dustproof filter provided in a part of the flow passage. The mounting portion is provided with a plurality of needle-like projections, and the dust-proof filter is hooked and fixed to the needle-like projections.

According to the first aspect of the present invention, when the dust-proof filter is deteriorated due to use over time and the function of the dust-proof filter is deteriorated, the dust-proof filter is caught on the needle-like projection of the mounting portion when the dust-proof filter is replaced. This is done by removing the dust filter and hooking a new dust filter on the projection.

This is a simple configuration in which a projection is provided on the mounting portion.
The dust-proof filter can be replaced simply by hooking or peeling the dust-proof filter on the protrusion, and the dust-proof filter can be easily attached and detached. Further, unlike the conventional case, there is no need to provide a double-sided tape or the like in the dustproof filter, so that the cost and the amount of dust generated can be reduced, and the channel can be easily recycled.

According to a second aspect of the present invention, there is provided a filter device provided with a dustproof filter provided in a part of a flow passage communicating with a blower, comprising a frame to which a dustproof filter is attached, wherein the frame is a flow passage. The frame is provided with a plurality of needle-like projections on one surface thereof, and the needle-like projections are hooked and fixed with a dustproof filter.

According to the second aspect of the present invention, when replacing the dustproof filter, the frame is removed from the flow path, and the dustproof filter hooked on the projection provided on one surface of the frame is peeled off. Is hooked on the projection of the frame.

With a simple structure in which a projection is provided on one side of the frame,
Since the dustproof filter can be easily attached and detached, mistakes in assembling the dustproof filter hardly occur, and the dustproof filter can be easily replaced. In addition, since the dust filter unit can be replaced, the frame does not need to be replaced as in the related art, and the frame is not discarded when the dust filter is replaced. Can be reduced.

According to a third aspect of the present invention, there is provided a filter device provided with a dustproof filter provided in a part of a flow passage communicating with a blower, comprising a frame to which the dustproof filter is attached, wherein the frame is a flow passage. The frame body is provided with a plurality of needle-like projections on both sides thereof, and the dust-proof filters are hooked and fixed to the needle-like projections on both sides of the frame body, respectively.

According to the third aspect of the present invention, when replacing the dustproof filter, the frame is removed from the flow path, the dustproof filters hooked on the projections formed on both sides of the frame are peeled off, and a new dustproof filter is removed. This is performed by hooking the filter on the projections on both sides of the frame.

With a simple configuration in which projections are provided on both sides of the frame,
Two dustproof filters can be provided in one frame,
The replacement cycle of the dustproof filter can be lengthened. Further, since the dust filter is easily attached and detached, mistakes in assembling the dust filter are less likely to occur, and the dust filter can be easily replaced. Further, since the dust filter unit can be replaced, the cost and the amount of dust generated can be reduced.

[0023]

Embodiments of the present invention will be described below in detail with reference to the accompanying drawings. FIG. 1 shows the first
FIG. 2 is a configuration diagram schematically illustrating a scanner according to the embodiment, FIG. 2 is an exploded perspective view schematically illustrating a cooling device of the scanner in FIG. 1, and FIG. 3 is formed at a sticking portion of a duct. It is a perspective view which expands and shows a protrusion.

As shown in FIG. 1, the scanner 1 optically reads an original, and includes a first carriage 5 that moves along the original surface, a second carriage 4 that moves together with the first carriage 5, A lens 6, a CCD (charge coupled device) 7, and a cooling device 8 are provided.

The first carriage 5 irradiates the original surface with a light source, and the reflected light is guided to the lens 6 via the mirrors of the first carriage 5 and the second carriage 4. The reflected light is converged by the lens 6, enters the CCD 7, and is photoelectrically converted.

As shown in FIG. 2, the cooling device 8 includes a cross flow fan (cooling fan) 11 as a blower, and a filter device 9 including a dustproof filter 10 and a duct (flow path) 12. The outside air is guided into the scanner 1 by a cooling fan through a dustproof filter.

The duct 12 is made of a resin molded product.
On the suction side of the duct 12, an allowance (attachment portion) 12a for the dustproof filter 10 is provided. A large number of protrusions 20 are formed integrally with the duct 12 on the sticking margin 12a. The projection 20 has a needle shape.
When the dust filter 10 is pressed, the dust filter 1
2 is caught by the needle-like projection 20 and adheres (fixes) to the duct 12.

As shown in FIG. 3, the tip of the needle-like projection 20 is spherical with R 0.5 mm or less, the height h = 1 to 4 mm, and the shape of the maximum part is a circle or one side having a diameter d = 1 to 3 mm. 1 to
The dustproof filter 12 could be fixed well if it was a 3 mm square (for example, a triangle or a quadrangle) and the density of the protrusions 20 in the bonding margin 12a was 3 to 10 / cm ² . It goes without saying that the shape of the protrusion 20 and the density of the protrusion 20 in the sticking portion 12a are not limited to those described above.

In such a configuration, when the dustproof filter 12 becomes dirty with use over time and the function of the dustproof filter 12 deteriorates, the dustproof filter 12 is replaced. When replacing the dustproof filter 12, the dustproof filter 10 hooked on the needle-like projection 20 of the sticking portion 12a is peeled off, and a new dustproof filter is hooked on the projection 20.

With a simple configuration in which only the protrusion 20 is provided on the sticking portion 12a of the duct 12, only the dustproof filter 10 can be easily peeled off from the duct 12, and the dustproof filter 12
Can be easily re-fixed, mistakes in assembling the dust-proof filter 10 are unlikely to occur, and the dust-proof filter 10 has good exchangeability. Further, unlike the related art, it is not necessary to provide a double-sided tape or the like on the dustproof filter 10, so that the cost and the amount of dust generated can be reduced. Moreover, since the projections 20 are formed integrally with the ducts 12, there is no need to separate the projections 20 and the ducts 12 by material when recycling the ducts 12, so that the ducts 12 can be easily recycled.

Next, another embodiment will be described. In the description, the same parts as those described above are denoted by the same reference numerals, and the description thereof will be omitted.

FIG. 4 is a block diagram schematically showing a copying machine according to a second embodiment. FIG. 5 schematically shows a filter device according to the second embodiment. It is an exploded perspective view of an apparatus, and (b) is a sectional view of a projection.

As shown in FIG. 4, a copying machine 2 as an electrophotographic apparatus uniformly charges a photosensitive member by a charging charger, and forms an electrostatic latent image corresponding to a developed image on the photosensitive member charged by an exposure device. Forming, developing the electrostatic latent image as a toner image by a developing device, transferring the toner image of the photoreceptor to the paper by a transfer device, and fixing the toner image of the paper by a fixing device to form an image on the paper. Is what you do.

The copying machine 2 further includes a sirocco fan (dust collecting fan) 15 as a blower, a filter device 9, an ozone filter 17, and a dust collecting and discharging device 24 including a duct 22. The dust collection and exhaust device 24 includes the dust collection fan 1
By the drive of 5, the toner and ozone generated from the photoconductor and the charger around the photoconductor indicated by reference numeral 3 in FIG. The filter unit 9 and the ozone filter 17 collect and treat waste toner and the like from the suction unit B through the duct 22.

Filter device 9 and ozone filter 17
Is attached to the cross section of the duct 22 on the upstream side of the dust collecting fan 15. In the present embodiment, the filter device 9
Is, as shown in FIG. 5A, a dustproof filter 10,
A sheet metal frame 18 to which the dustproof filter 10 is attached is provided, and the frame 18 is pulled out of the duct 22 at the time of replacement. In addition, in FIG.
Is a handle for pulling out the frame 18.

One surface 18a of the frame 18 is provided on the one side 18a of FIG.
And (b), a plurality of needle-like projections 21 are provided. The needle-like projection 21 is provided on one surface 18a of the frame 18.
Is formed as a blade of a grater, and the length D of one side of the bottom of the projection 21 is a triangle of 1 to 3 mm, the tip is 0.5 mm or less, and the height from the one surface 18a of the frame 18 is h = 1 to 3 mm, and one surface 18a of the frame body 18
Is 3 to 6 particles / cm ² . This frame 18
When the dustproof filter 10 is pressed against one surface 18a of the frame 18, the dustproof filter 10 is easily caught on the needle-like projection of the frame 18 and adheres (fixes).

In this embodiment, when replacing the dustproof filter 10, the frame 18 is removed from the duct 22, the dustproof filter 10 hooked on the projection 21 provided on one surface 18a of the frame 18 is peeled off, and a new filter is removed. This is performed by hooking the dustproof filter on the protrusion 21 of the frame 18.

Since the dustproof filter 10 can be easily attached and detached with a simple structure in which the projection 21 is provided on one surface 18a of the frame 18, the mistake of assembling the dustproof filter 10 does not easily occur, and the exchangeability of the dustproof filter 10 is improved. good. Further, since the dust filter 10 can be replaced in units, the frame 18 does not need to be replaced as in the related art, and the frame 18 does not need to be discarded when the dust filter 10 is replaced. In addition, the amount of generated dust can be reduced.

FIG. 6 is a diagram showing a filter device according to the third embodiment. In the third embodiment, as shown in FIG. 6, a projection 20 similar to that of the first embodiment is integrally provided on both surfaces 18a and 18b of a resin frame 18 in the second embodiment. And form. That is, the dustproof filter 10 is fixed to both surfaces 18a and 18b of one frame 18 so that the dustproof filter 10 does not need to be frequently replaced when the scattering amount of the toner is large.

In this embodiment, when replacing the dustproof filter 10, the frame 18 is removed from the duct 22, and the dustproof filter 10 hooked on the projections 20 formed on both surfaces 18a and 18b of the frame 18 is removed. Peeling is performed by hooking and fixing a new dust filter on the projections 20 on both surfaces 18a and 18b of the frame body 18, respectively.

As described above, in the present embodiment, the same operation and effect as those of the second embodiment can be obtained, and the projections 20 are provided on the both surfaces 18a and 18b of the frame 18 with a simple structure.
The two dustproof filters 10 and 10 can be fixed to one frame 18, and the replacement cycle of the dustproof filter 10 can be lengthened.

The present invention is not limited to the above-described embodiment, and various modifications can be made without departing from the gist of the present invention. For example, in the first embodiment, the duct 22 may be made of metal. Further, in the second embodiment, the frame 18 may be made of resin, and the protrusions may be made the same as in the first embodiment.
The frame 18 may be made of sheet metal, and the protrusions may be the same as in the second embodiment.

Although the present invention has been applied to a copying machine and a scanner,
For example, an electrophotographic apparatus other than a copying machine such as a printer, a facsimile, or a composite machine thereof, or an apparatus using the filter device 9 such as an air conditioner and an air purifier can be applied, and the same operation and effect can be obtained.

[0044]

According to the first aspect of the present invention, the dustproof filter has a simple structure in which the projection is provided on the mounting portion, and the dustproof filter is easily attached and detached. Good nature. Also,
Since there is no need to attach a double-sided tape or the like to the dustproof filter, costs and the amount of dust generated can be reduced,
The channel can be easily recycled.

According to the second aspect of the present invention, the dust-proof filter can be easily attached and detached with a simple structure in which a projection is provided on one surface of the frame body. Good interchangeability. Further, since the dust filter can be replaced in units, the cost and the amount of dust generated can be reduced.

According to the third aspect of the present invention, two dustproof filters can be provided on one frame with a simple structure in which projections are provided on both surfaces of the frame, and the cycle of replacement of the dustproof filters can be lengthened. Further, since the dust filter is easily attached and detached, mistakes in assembling the dust filter are less likely to occur, and the dust filter can be easily replaced. Further, since the dust filter unit can be replaced, the cost and the amount of dust generated can be reduced.

[Brief description of the drawings]

FIG. 1 is a configuration diagram schematically showing a scanner according to a first embodiment.

FIG. 2 is an exploded perspective view schematically showing a cooling device of the scanner of FIG. 1;

FIG. 3 is an enlarged perspective view showing a protrusion formed on a sticking portion of the duct.

FIG. 4 is a configuration diagram schematically showing a copying machine according to a second embodiment.

FIG. 5 schematically shows a filter device according to a second embodiment, in which (a) is an exploded perspective view of the filter device;
(B) is a sectional view of the protrusion.

FIG. 6 is a diagram schematically showing a filter device according to a third embodiment.

FIG. 7 is an exploded perspective view schematically showing a conventional cooling device.

FIG. 8 is a perspective view showing a conventional filter device.

[Explanation of symbols]

 Reference Signs List 8 Filter device 10 Dustproof filter 11 Cooling fan (blower) 12, 22 Duct (flow path) 15 Dust collector fan (blower) 18 Frame 20, 21 Projection

Claims (3)

[Claims] 1. A filter device comprising a flow passage communicating with a blower and a dustproof filter provided in a part of the flow passage, wherein the flow passage has a mounting portion for mounting the dustproof filter, and the mounting portion has a needle-like shape. A plurality of projections are provided, and a dustproof filter is hooked and fixed on the needle-like projections. 2. A filter device comprising a dustproof filter provided in a part of a flow passage communicating with a blower, comprising: a frame to which a dustproof filter is attached, wherein the frame is detachable from the flow passage. A filter device, wherein a plurality of needle-like projections are provided on one surface of a frame, and a dust-proof filter is hooked and fixed on the needle-like projections. 3. A filter device comprising a dustproof filter provided in a part of a flow passage communicating with a blower, comprising: a frame to which a dustproof filter is attached, wherein the frame is detachable from the flow passage. A filter device, wherein a plurality of needle-like projections are provided on both sides of the frame, and a dustproof filter is hooked and fixed to each of the needle-like projections on both sides of the frame.