JP2008302548A - Cooling structure of heating element and image forming apparatus - Google Patents

Cooling structure of heating element and image forming apparatus Download PDF

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JP2008302548A
JP2008302548A JP2007150222A JP2007150222A JP2008302548A JP 2008302548 A JP2008302548 A JP 2008302548A JP 2007150222 A JP2007150222 A JP 2007150222A JP 2007150222 A JP2007150222 A JP 2007150222A JP 2008302548 A JP2008302548 A JP 2008302548A
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heating element
cooling structure
gear
housing
blade
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JP5010991B2 (en
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Yoshio Sugishima
芳雄 杉島
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Kyocera Document Solutions Inc
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Kyocera Mita Corp
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  • Accessory Devices And Overall Control Thereof (AREA)

Abstract

<P>PROBLEM TO BE SOLVED: To provide a cooling structure capable of expecting improvement of cooling efficiency in the cooling structure of a heating element for cooling the heating element with the wind sent by a blade by providing the heating element mounted in a fitting hole formed in a housing and a gear with the blade fitted on a rotating shaft near the heating element and partly constituted as an air-blowing fan-like blade and rotating the gear with the blade. <P>SOLUTION: The cooling structure of the heating element in which the wind sent by the blade passes through the housing surrounding the heating element and a vent hole for cooling the heating element with this wind is formed, is provided. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

本発明は，ハウジングに形成された取付孔に装着された発熱体と，上記発熱体の近傍に設けられた軸に取り付けられ，一部が送風ファン状の羽根として構成された羽根付きギアとを備え，上記羽根付きギアが回転することによって上記羽根によって送られた風によって上記発熱体を冷却する発熱体の冷却構造に係り，特に，冷却効率の向上が可能な冷却構造に関するものである。   The present invention includes a heating element mounted in a mounting hole formed in a housing, and a bladed gear attached to a shaft provided in the vicinity of the heating element and partially configured as a fan-like blade. The present invention relates to a cooling structure for a heating element that cools the heating element by the wind sent by the blade as the bladed gear rotates, and more particularly to a cooling structure that can improve cooling efficiency.

従来，プリンタ，ファクシミリ装置，複写機等の画像形成装置では，感光体ドラムや中間転写体などの回転機器の駆動源としてサーボモータやステッピングモータが採用されることが多い。その他，多段の給紙カセットを備え，各カセットに対応して設けられた給紙ローラ（給紙部の一例）をクラッチによって切り替えることで，使用するカセットを選択する場合もある。   Conventionally, in an image forming apparatus such as a printer, a facsimile machine, and a copying machine, a servo motor or a stepping motor is often used as a drive source of a rotating device such as a photosensitive drum or an intermediate transfer member. In addition, a cassette to be used may be selected by providing a multi-stage sheet cassette and switching a sheet feed roller (an example of a sheet feed unit) corresponding to each cassette by a clutch.

上記のようなモータ類や，クラッチ類は，内部にコイルを備えており，長時間の使用によってかなりの高温になる発熱体として捉えられ，あまりに高温となると上記コイルやそれに近接して設けられたコンデンサなどの電子機器の寿命に悪影響を与える可能性がある。   The motors and clutches as described above have a coil inside and are regarded as a heating element that becomes quite hot when used for a long time. May adversely affect the life of electronic devices such as capacitors.

そのため，例えば特許文献１には，発熱体の近傍に設けられたギアを，その一部が送風ファン状の羽根状部として構成された羽根付きギアとして構成し,この羽根付きギアが回転した時に生じる風によって，上記発熱体を冷却することが提案されている。
特開２００１−３３６６１２号公報 Therefore, for example, in Patent Document 1, a gear provided in the vicinity of a heating element is configured as a bladed gear part of which is configured as a fan-like blade-shaped portion, and when the bladed gear rotates, It has been proposed to cool the heating element by the generated wind.
JP 2001-336612 A

上記羽根付きギアを用いれば，もともと必要なギア自身が送風ファンとしての機能を有するので，新たに送風手段を設ける必要がなく，場所をとらず，装置の小型化に適切に寄与しうることになる。
しかしながら，特許文献１に示される冷却構造では，羽根付きギアによって起こされた風を単純に発熱体に吹き付けるだけであるので，発熱体の上記羽根付きギアに面した部分については冷却される可能性があるが，発熱体の広い面積，例えばその周囲から広く熱を奪うものではないので，冷却の効率が非常に悪いという欠点は否めない。
従って，本発明は上記事情に鑑みてなされたものであり，その目的とするところは，前記したハウジングに形成された取付孔に装着された発熱体と，上記発熱体の近傍に設けられた軸に取り付けられ，一部が送風ファン状の羽根として構成された羽根付きギアとを備え，上記羽根付きギアが回転することによって上記羽根によって送られた風によって上記発熱体を冷却する発熱体の冷却構造における冷却効率の向上を期待しうる冷却構造を提供することである。 If the above-mentioned gear with blades is used, the necessary gear itself has a function as a blower fan, so there is no need to newly provide a blower means, and it can save space and appropriately contribute to downsizing of the device. Become.
However, in the cooling structure shown in Patent Document 1, since the wind generated by the bladed gear is simply blown to the heating element, the portion of the heating element facing the bladed gear may be cooled. However, since it does not take heat widely from the large area of the heating element, for example, from its surroundings, it cannot be denied that cooling efficiency is very poor.
Accordingly, the present invention has been made in view of the above circumstances, and its object is to provide a heating element mounted in a mounting hole formed in the housing and a shaft provided in the vicinity of the heating element. And a bladed gear partly configured as a fan-like blade, and cooling the heating element by cooling the heating element by the wind sent by the blade as the bladed gear rotates. The object is to provide a cooling structure that can be expected to improve the cooling efficiency of the structure.

上記目的を達成するために本発明に係る発熱体の冷却構造は，
ハウジングに形成された取付孔に装着された発熱体と，上記発熱体の近傍に設けられた軸に取り付けられ，一部が送風ファン状の羽根として構成された羽根付きギアとを備え，上記羽根付きギアが回転することによって上記羽根によって送られた風によって上記発熱体を冷却する発熱体の冷却構造において，
上記発熱体を囲む上記ハウジングに，上記羽根によって送られた風が流通し，この風によって発熱体を冷却するための通気孔が形成されてなることを特徴とする発熱体の冷却構造として構成される。 In order to achieve the above object, the cooling structure for a heating element according to the present invention is:
A heating element mounted in a mounting hole formed in the housing, and a gear with a blade attached to a shaft provided in the vicinity of the heating element and partly configured as a fan-like blade. In the cooling structure of the heating element that cools the heating element by the wind sent by the blade as the attached gear rotates,
A cooling structure for a heating element is provided, in which the wind sent by the blades flows through the housing surrounding the heating element, and a ventilation hole for cooling the heating element is formed by the wind. The

本発明に係る発熱体の冷却構造においては，上記のように上記羽根の回転によって生じた風が通気孔を流通するので，その周りのハウジングやクラッチ，モータなどの発熱体を効率よく冷却することができる。   In the cooling structure of the heating element according to the present invention, the wind generated by the rotation of the blades circulates through the ventilation holes as described above, so that the heating elements such as the housing, the clutch, and the motor around it can be efficiently cooled. Can do.

この場合，前記通気孔は，上記発熱体に隣接して形成されてなるものであれば冷却効率は極めてよくなるであろうし，後記する実施形態のように接して設けられていれば，もっともよくなるであろう。   In this case, if the vent hole is formed adjacent to the heating element, the cooling efficiency will be very good. If the vent hole is provided in contact as in the embodiment described later, it will be best. I will.

前記通気孔が，上記ハウジングの上記羽根付きギアと対向する部分に形成された流入部と，該流入部と接続され上記発熱体の周囲に形成された隙間部と，該隙間部と接続され上記ハウジングの上記ギアと反対側の部分に形成された流出部とを備えて形成されていれば，上記流入部から入った風が発熱体の周囲に形成された隙間部を通って発熱体を冷却し，そのご流出部から流出することになり，効率のよい冷却構造が提供される。   The vent is formed at a portion of the housing facing the bladed gear, an inflow portion, a gap portion connected to the inflow portion and formed around the heating element, and connected to the gap portion. If it is formed with an outflow part formed on the opposite side of the gear to the housing, the wind entering from the inflow part cools the heating element through a gap formed around the heating element. However, it will flow out from the outflow part, and an efficient cooling structure will be provided.

さらに，前記通気孔の一部が，そこを通過する上記風の流れ方向に進む螺旋状壁部により構成されてなるような構造が考えられる。このような螺旋状壁部があれば，風は流れを遮られることなく，この螺旋状壁部に沿って円滑に流れることになり，冷却効率の向上が期待される。   Furthermore, a structure in which a part of the vent hole is constituted by a spiral wall portion that proceeds in the wind flow direction passing therethrough can be considered. If there is such a spiral wall, the wind will flow smoothly along the spiral wall without blocking the flow, and an improvement in cooling efficiency is expected.

冷却すべき発熱体が複数ある場合には，前記通気孔を，近接して設けられた複数の発熱体にわたって連続して形成することで，１つの通気孔で上記複数の発熱体を一挙に冷却することができる。
前記発熱体としては，クラッチ，モータなどの電磁的アクチュエータである場合が多い。
この発明は，上記のようなクラッチやモータを備えた機器に等しく適用可能であるが，前記発熱体が，画像形成装置の給紙部を駆動するクラッチについても適用可能である。そのような場合には，上記クラッチの冷却構造を持った画像形成装置が対象となる。 When there are a plurality of heating elements to be cooled, the plurality of heating elements can be cooled at once by forming one ventilation hole so that the ventilation holes are continuously formed over a plurality of heating elements provided in close proximity. can do.
The heating element is often an electromagnetic actuator such as a clutch or a motor.
The present invention is equally applicable to devices having the above-described clutches and motors, but is also applicable to a clutch in which the heating element drives a paper feed unit of an image forming apparatus. In such a case, the image forming apparatus having the clutch cooling structure is a target.

本発明に係る発熱体の冷却構造においては，上記のように上記羽根の回転によって生じた風が通気孔を流通するので，その周りのハウジングやクラッチ，モータなどの発熱体を効率よく冷却することができる。   In the cooling structure of the heating element according to the present invention, the wind generated by the rotation of the blades circulates through the ventilation holes as described above, so that the heating elements such as the housing, the clutch, and the motor around it can be efficiently cooled. Can do.

以下添付図面を参照しながら，本発明の実施の形態について説明し，本発明の理解に供する。尚，以下の実施の形態は，本発明を具体化した一例であって，本発明の技術的範囲を限定する性格のものではない。
ここに，図１は本発明の実施形態に係る発熱体の冷却構造に用いられる羽根付きギアの斜視図，図２はクラッチ取り付けハウジング部分の斜視図，図３は図２に示した部分の羽根付きギアを取り外した状態を示す斜視図，図４は上記クラッチ取り付けハウジング自体の単体の斜視図，図５は上記ハウジングの流出部側から見た部分斜視図，図６は，上記流出部側から見たハウジングの全体を示す正面図である。 Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings so that the present invention can be understood. The following embodiment is an example embodying the present invention, and does not limit the technical scope of the present invention.
1 is a perspective view of a gear with blades used in a cooling structure for a heating element according to an embodiment of the present invention, FIG. 2 is a perspective view of a clutch mounting housing portion, and FIG. 3 is a blade portion of the portion shown in FIG. FIG. 4 is a perspective view of the clutch mounting housing itself, FIG. 5 is a partial perspective view seen from the outflow portion side of the housing, and FIG. 6 is a view from the outflow portion side. It is a front view which shows the whole housing seen.

まず，図１を参照して，本実施形態に用いる羽根付きギアの構造について説明する。
図１に示すように，羽根付きギア１は，後述の回転軸１５に取り付けるための取付孔３を備えたボス部５をその中心に有し，上記ボス部５とその外周のギア部７とが複数の（この場合６枚）羽根９によって連結され，一体に構成されている。なお，外周のギア形状は図示省略されている。
上記羽根９は，送風用のファン状に上記ボス部５の軸心に対して所定角度傾斜しており，回転することで，風を送る機能がある。この羽根付きギア１の場合，図示の状態で時計方向に回転することで，紙面の裏から表の方向に風が送られる。 First, the structure of a bladed gear used in the present embodiment will be described with reference to FIG.
As shown in FIG. 1, the bladed gear 1 has a boss portion 5 having an attachment hole 3 for attachment to a rotating shaft 15 to be described later at the center, and the boss portion 5, the outer gear portion 7, Are connected by a plurality of (in this case, six) blades 9 and are integrally formed. The outer peripheral gear shape is not shown.
The blades 9 are inclined at a predetermined angle with respect to the axis of the boss portion 5 in the shape of a fan for blowing air, and have a function of sending wind by rotating. In the case of the gear 1 with blades, by rotating clockwise in the state shown in the figure, wind is sent in the front direction from the back of the paper.

この羽根付きギア１が取り付けられるハウジング１１は，図３において一点鎖線で示されており（図４に実線で示されている），この場合，図３に示されるように，２個のクラッチ１３ａ及び１３ｂがこのハウジング１１に形成された取付孔１１ａ，１１ｂに装着されて埋め込まれて取り付けられている。この実施形態においては上記クラッチ１３ａ及び１３ｂが，本発明における発熱体の一例である。
上記クラッチ１３ａ及び１３ｂは，画像形成装置における給紙部に設けられた給紙ローラを駆動させるためのもので，装置の小型化によって給紙カセットごとの給紙部が非常に近接していることにより，上記クラッチ１３ａ及び１３ｂも，図示のように非常に近接して設けられ，それ故にそれぞれのクラッチで発生した熱の逃げ場がなくなり，温度上昇が著しくなっている。 The housing 11 to which the bladed gear 1 is attached is shown by a one-dot chain line in FIG. 3 (shown by a solid line in FIG. 4). In this case, as shown in FIG. And 13b are mounted and embedded in mounting holes 11a and 11b formed in the housing 11. In this embodiment, the clutches 13a and 13b are an example of a heating element in the present invention.
The clutches 13a and 13b are for driving a paper feed roller provided in a paper feed unit in the image forming apparatus, and the paper feed units of the respective paper feed cassettes are very close to each other due to downsizing of the device. As a result, the clutches 13a and 13b are also provided very close to each other as shown in the figure. Therefore, there is no escape from the heat generated in each clutch, and the temperature rises remarkably.

図３に示されるように，ハウジング１１には，上記したクラッチ１３ａ及び１３ｂに隣接して，これらのクラッチ１３ａ及び１３ｂに平行な回転軸１５が設けられている。この回転軸１５が，本発明における軸の一例である。この回転軸１５には，図２に示すように上記羽根付きギア１が取り付けられている。なお，図３はこの回転軸１５から羽根付きギア１を取り外した状態を示すものである。   As shown in FIG. 3, the housing 11 is provided with a rotating shaft 15 adjacent to the clutches 13a and 13b and parallel to the clutches 13a and 13b. The rotating shaft 15 is an example of a shaft in the present invention. The bladed gear 1 is attached to the rotating shaft 15 as shown in FIG. FIG. 3 shows a state in which the bladed gear 1 is removed from the rotating shaft 15.

上記のように羽根付きギア１が，クラッチ１３ａ及び１３ｂの近傍に設けられているので，上記羽根付きギア１が回転することによって上記羽根９によって送られた風によって上記クラッチ１３ａ及び１３ｂの少なくとも表面が冷却される。
この点については，特許文献１に記載された冷却構造と変わるところはない。ただし，この実施形態に係る冷却構造では，上記発熱体の一例である上記クラッチ１３ａ及び１３ｂを取り付けた上記ハウジング１１に，上記羽根９によって送られた風が流通し，この風によって上記クラッチ１３ａ及び１３ｂを冷却するための通気孔１７が形成されている点において，前記従来技術とは大きく異なる。
上記通気孔１７は，上記クラッチ１３ａ及び１３ｂに近接して，特に，前記取付孔１１ａ，１１ｂと，その中に装着したクラッチ１３ａ，１３ｂとの間の隙間部として形成されていることが望ましい。このように構成することで，そこを通る冷却風がクラッチ１３ａ，及び１３ｂに直接接触して流れるので，冷却効率が著しく向上する。
即ち，この実施形態では，上記通気孔１７は，上記冷却用の風が，上記クラッチ１３ａ及び１３ｂの周囲を湾曲して流れるように，曲線的に湾曲して構成されている。 Since the bladed gear 1 is provided in the vicinity of the clutches 13a and 13b as described above, at least the surfaces of the clutches 13a and 13b by the wind sent by the blade 9 as the bladed gear 1 rotates. Is cooled.
In this regard, there is no difference from the cooling structure described in Patent Document 1. However, in the cooling structure according to this embodiment, the wind sent by the blades 9 flows through the housing 11 to which the clutches 13a and 13b, which are examples of the heating element, are attached. It differs greatly from the prior art in that a vent hole 17 for cooling 13b is formed.
The vent hole 17 is preferably formed in the vicinity of the clutches 13a and 13b, particularly as a gap between the mounting holes 11a and 11b and the clutches 13a and 13b mounted therein. With this configuration, the cooling air passing therethrough flows in direct contact with the clutches 13a and 13b, so that the cooling efficiency is significantly improved.
That is, in this embodiment, the vent hole 17 is configured to be curved so that the cooling air flows around the clutches 13a and 13b.

具体的には，上記通気孔１７は，前記羽根付きギア１及びこれが取り付けられた回転軸１５と同軸で，上記ハウジング１１の上記羽根付きギア１と対向する部分に形成された流入部１７ａと，この流入部１７ａに隣接し，流入部１７ａと連続的に接続されたクラッチ１３ａの周囲の第１の隙間部１７ｂと，上記第１の隙間部１７ｂと連続的に接続されたクラッチ１３ｂの周囲の第２の隙間部１７ｃと，上記第２の隙間部１７ｃと連続し，上記ハウジング１１の羽根付きギア１と反対側の部分に形成された流出部１７ｄとから構成されている。   Specifically, the vent hole 17 is coaxial with the bladed gear 1 and the rotary shaft 15 to which the bladed gear 1 is attached, and has an inflow portion 17a formed in a portion of the housing 11 facing the bladed gear 1. A first clearance 17b around the clutch 13a that is adjacent to the inflow portion 17a and is continuously connected to the inflow portion 17a, and a periphery of the clutch 13b that is continuously connected to the first clearance 17b. The second gap portion 17c and the second gap portion 17c are connected to the second gap portion 17c and an outflow portion 17d formed on the opposite side of the housing 11 from the bladed gear 1.

従って，羽根付きギア１の回転によって羽根９で送られた風は，まず，前記流入部１７ａに流れ込み，その後流入部１７ａに接続された第１の隙間部１７ｂを通って直接接触するクラッチ１３ａを冷却し，その後更に第１の隙間部１７ｂと接続された第２の隙間部１７ｃを通って直接接触するクラッチ１３ｂを冷却したのち，前記流出部１７ｄからハウジング１１外に排出される。
このように，この実施形態にかかる冷却構造では，羽根付きギア１による風が，単にクラッチのような発熱体に吹き付けられるだけでなく，ハウジング１１に形成された通気孔１７を経て，クラッチ１３ａ及び１３ｂの周囲を通ってハウジング１１の表側から裏側まで通り抜けるので，効率よくクラッチ１３ａ及び１３ｂ及びハウジング１１を冷却することができる。
通気孔１７は，必ずしも上記クラッチ１３ａあるいは１３ｂと接していなくてもよいが，上記実施形態のようにクラッチ１３ａあるいは１３ｂと接している場合には，冷却風が直接クラッチに接触するので，特に高い冷却効果が期待されうる。 Accordingly, the wind sent by the blades 9 by the rotation of the bladed gear 1 first flows into the inflow portion 17a, and then the clutch 13a that directly contacts through the first gap portion 17b connected to the inflow portion 17a. After cooling, the clutch 13b that directly contacts through the second gap portion 17c connected to the first gap portion 17b is further cooled, and then discharged from the housing 11 through the outflow portion 17d.
As described above, in the cooling structure according to this embodiment, the wind generated by the bladed gear 1 is not simply blown to the heating element such as the clutch, but also through the vent hole 17 formed in the housing 11 and the clutch 13a and Since it passes through the periphery of 13b from the front side to the back side of the housing 11, the clutches 13a and 13b and the housing 11 can be efficiently cooled.
The vent hole 17 does not necessarily need to be in contact with the clutch 13a or 13b. However, when the air hole 17 is in contact with the clutch 13a or 13b as in the above embodiment, the cooling air is in direct contact with the clutch. A cooling effect can be expected.

更にこの実施形態に係る通気孔１７は，そこを通る風が円滑に流れるようにこの通気孔１７の一部が，そこを通過する上記風の流れ方向に進む螺旋状壁部１９により構成されている。このような風の流れ方向に進む（図３の場合，紙面手前から紙面裏面方向へ進む）螺旋状壁部１９が形成されていることによって，風がこの螺旋状壁部１９に沿って流れることになり，風の流れが円滑となり，冷却効果が向上する。   Furthermore, the vent hole 17 according to this embodiment is configured by a spiral wall portion 19 in which a part of the vent hole 17 advances in the direction of the wind passing therethrough so that the wind passing therethrough flows smoothly. Yes. By forming the spiral wall portion 19 that proceeds in such a wind flow direction (in the case of FIG. 3, it proceeds from the front side to the back side of the paper surface), the wind flows along the spiral wall portion 19. The flow of wind becomes smooth and the cooling effect is improved.

この実施形態においては，前記したように前記通気孔１７が，近接して設けられた複数のクラッチ１３ａの周囲及び１３ｂの周囲にわたって連続して形成されているが，これは一例であって，クラッチ毎に独立に形成してもよいことは言うまでもない。
また，通気孔１７が，近接して設けられた複数のクラッチ１３ａ及び１３ｂにわたって連続して形成されている場合であっても，排気部を構成する流出部１７ｄについては，クラッチ毎に設けられてもよい。この実施形態では,このように流出部１７ｄが図５に示すようにクラッチ毎に設けられている場合である。 In this embodiment, as described above, the vent hole 17 is formed continuously around the periphery of the plurality of clutches 13a and 13b provided close to each other. Needless to say, each may be formed independently.
Even when the vent hole 17 is continuously formed across the plurality of clutches 13a and 13b provided in close proximity, the outflow part 17d constituting the exhaust part is provided for each clutch. Also good. In this embodiment, the outflow portion 17d is provided for each clutch as shown in FIG.

本発明の実施形態に係る発熱体の冷却構造に用いられる羽根付きギアの斜視図。The perspective view of the gear with a blade | wing used for the cooling structure of the heat generating body which concerns on embodiment of this invention. クラッチ取り付け用のハウジング部分の斜視図。The perspective view of the housing part for clutch attachment. 図２に示した部分の羽根付きギアを取り外した状態を示す斜視図。The perspective view which shows the state which removed the gear with a blade | wing of the part shown in FIG. クラッチ取り付け用のハウジング自体の単体の斜視図。The perspective view of the single body of the housing itself for clutch attachment. ハウジングの流出部側から見た部分斜視図。The partial perspective view seen from the outflow part side of the housing. 流出部側から見たハウジングの全体を示す正面図。The front view which shows the whole housing seen from the outflow part side.

符号の説明Explanation of symbols

１…羽根付きギア
３…取付孔
９…羽根
１１…ハウジング
１３（１３ａ，１３ｂ）…クラッチ（発熱体）
１５…回転軸
１７…通気孔
１７ａ…流入部
１７ｂ…第１の隙間部
１７ｃ…第２の隙間部
１９…螺旋状壁部 DESCRIPTION OF SYMBOLS 1 ... Gear with blade 3 ... Mounting hole 9 ... Blade 11 ... Housing 13 (13a, 13b) ... Clutch (heating element)
DESCRIPTION OF SYMBOLS 15 ... Rotating shaft 17 ... Vent hole 17a ... Inflow part 17b ... 1st clearance part 17c ... 2nd clearance part 19 ... Spiral wall part

Claims (8)

ハウジングに形成された取付孔に装着された発熱体と，上記発熱体の近傍に設けられた軸に取り付けられ，一部が送風ファン状の羽根として構成された羽根付きギアとを備え，上記羽根付きギアが回転することによって上記羽根によって送られた風によって上記発熱体を冷却する発熱体の冷却構造において，
上記発熱体を囲む上記ハウジングに，上記羽根によって送られた風が流通し，この風によって発熱体を冷却するための通気孔が形成されてなることを特徴とする発熱体の冷却構造。 A heating element mounted in a mounting hole formed in the housing, and a gear with a blade attached to a shaft provided in the vicinity of the heating element and partly configured as a fan-like blade. In the cooling structure of the heating element that cools the heating element by the wind sent by the blade as the attached gear rotates,
A cooling structure for a heating element, characterized in that a wind sent by the blades flows through the housing surrounding the heating element, and a ventilation hole for cooling the heating element is formed by the wind. 前記通気孔が，上記発熱体に隣接して形成されてなる請求項１記載の発熱体の冷却構造。   2. The cooling structure for a heating element according to claim 1, wherein the vent hole is formed adjacent to the heating element. 前記通気孔が，上記ハウジングの上記羽根付きギアと対向する部分に形成された流入部と，該流入部と接続され上記発熱体の周囲に形成された隙間部と，該隙間部と接続され上記ハウジングの上記ギアと反対側の部分に形成された流出部とを備えて形成されてなる請求項１あるいは２のいずれかに記載の発熱体の冷却構造。   The vent is formed at a portion of the housing facing the bladed gear, an inflow portion, a gap portion connected to the inflow portion and formed around the heating element, and connected to the gap portion. The cooling structure for a heating element according to claim 1, wherein the cooling structure is formed with an outflow portion formed at a portion of the housing opposite to the gear. 前記通気孔の一部が，そこを通過する上記風の流れ方向に進む螺旋状壁部により構成されてなる請求項１〜３のいずれかに記載の発熱体の冷却構造。   The cooling structure for a heating element according to any one of claims 1 to 3, wherein a part of the vent hole is configured by a spiral wall portion that proceeds in the flow direction of the wind passing therethrough. 前記通気孔が，近接して設けられた複数の発熱体にわたって連続して形成されてなる請求項１〜４のいずれかに記載の発熱体の冷却構造。   The cooling structure for a heating element according to any one of claims 1 to 4, wherein the vent hole is formed continuously over a plurality of heating elements provided close to each other. 前記発熱体が，クラッチ，モータなどの電磁的アクチュエータである請求項１〜５のいずれかに記載の発熱体の冷却構造。   6. The heating element cooling structure according to claim 1, wherein the heating element is an electromagnetic actuator such as a clutch or a motor. 請求項１〜６のいずれかに記載の発熱体の冷却構造を備えた画像形成装置。   An image forming apparatus comprising the heating element cooling structure according to claim 1. 前記発熱体が，画像形成装置の給紙部を駆動するクラッチである請求項７記載の画像形成装置。   The image forming apparatus according to claim 7, wherein the heating element is a clutch that drives a paper feeding unit of the image forming apparatus.
JP2007150222A 2007-06-06 2007-06-06 Heating element cooling structure and image forming apparatus Expired - Fee Related JP5010991B2 (en)

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US8469354B2 (en) 2010-11-19 2013-06-25 Kyocera Mita Corporation Drive mechanism and image forming apparatus
US11947312B2 (en) 2020-10-14 2024-04-02 Hewlett-Packard Development Company, L.P. Cooling structure for regulation blade of developing device

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US11947312B2 (en) 2020-10-14 2024-04-02 Hewlett-Packard Development Company, L.P. Cooling structure for regulation blade of developing device

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