JP2006243529A - Shaft holding mechanism and printer provided with the same - Google Patents

Shaft holding mechanism and printer provided with the same Download PDF

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JP2006243529A
JP2006243529A JP2005061135A JP2005061135A JP2006243529A JP 2006243529 A JP2006243529 A JP 2006243529A JP 2005061135 A JP2005061135 A JP 2005061135A JP 2005061135 A JP2005061135 A JP 2005061135A JP 2006243529 A JP2006243529 A JP 2006243529A
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shaft
groove
holding member
hole
support member
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Daisuke Ogawa
大輔 小川
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Funai Electric Co Ltd
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Funai Electric Co Ltd
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Abstract

<P>PROBLEM TO BE SOLVED: To provide a shaft holding mechanism of which the attachment/detachment of a shaft is easy. <P>SOLUTION: The shaft holding mechanism has a support member 50 including a recessed part 52 having a first groove 52a which accepts the shaft 30a and a holding member 70 including a projected part 72 having a third groove 72a which accepts the shaft 30a with the support member 50. The support member 50 has a through hole 51a into which the holding member 70 is inserted. In use of the shaft holding mechanism, a through hole insertion part 71 and the projected part 72 of the holding member 70 are first inserted into the through hole 51a and a second groove 52b of the support member 50. Next, the first groove 52a and the second groove 52b accept the shaft 30a. After that, the holding member 70 rotates around a rotation center axis of the shaft 30a. As a result, the shaft 30a is rotatably held by the recessed part 52 and the projected part 72. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

本発明は、シャフトを保持するシャフト保持機構およびそれが設けられたプリンタに関するものである。   The present invention relates to a shaft holding mechanism for holding a shaft and a printer provided with the shaft holding mechanism.

従来から、プリンタ等においては、感光ドラムを帯電させるためのチャージローラが用いられている。チャージローラは、その先端にシャフトが設けられ、シャフト保持機構によって保持される。シャフトは、プリンタ内に設けられた筐体に挿入され、シャフト保持機構としての支持部材に設けられた貫通孔に挿入され、回転可能に保持される。このとき、支持部材は、プラスチック製であるため、その弾性変形を利用し、支持部材を撓ませることによって、シャフトが貫通孔に挿入されている。
特開平５−１３４４９５号公報 特開平９−２２１２４６号公報 特開平１１−２０９８１号公報 特開２００１−７２２７５号公報 特開２００３−８９４４８号公報 Conventionally, in a printer or the like, a charge roller for charging a photosensitive drum has been used. The charge roller is provided with a shaft at the tip thereof and is held by a shaft holding mechanism. The shaft is inserted into a housing provided in the printer, inserted into a through hole provided in a support member as a shaft holding mechanism, and held rotatably. At this time, since the support member is made of plastic, the shaft is inserted into the through hole by using the elastic deformation and bending the support member.
JP-A-5-134495 JP-A-9-212246 JP-A-11-20981 JP 2001-72275 A JP 2003-89448 A

上記従来のシャフト保持機構は、支持部材の弾性変形を利用して、支持部材の貫通孔にシャフトを挿入しているため、シャフトの取り付けおよび取外しに手間がかかっている。   Since the conventional shaft holding mechanism uses the elastic deformation of the support member to insert the shaft into the through hole of the support member, it takes time to attach and remove the shaft.

本発明は、上述の問題に鑑みてなされたものであり、その目的は、シャフトの取り付けおよびシャフトの取外しが容易なシャフト保持機構およびそれが設けられたプリンタを提供することである。   The present invention has been made in view of the above problems, and an object of the present invention is to provide a shaft holding mechanism in which a shaft can be easily attached and detached and a printer provided with the shaft holding mechanism.

本発明のプリンタは、支持部材と保持部材とによって協働してシャフトを保持するシャフト保持機構を備えている。支持部材は、シャフトを受け入れる第１溝と第１溝に連続し第１溝よりも幅が大きな第２溝を有する凹部と、凹部に隣接し第２溝に連続する貫通孔を有する孔部とを有している。保持部材は、貫通孔に挿入される貫通孔挿入部と、貫通孔を介して第２溝に挿入される部位であって、貫通孔挿入部から突出しており、シャフトに対応した形状の第３溝を有する突出部とを有している。保持部材が貫通孔および第２溝に挿入された後、第３溝が第１溝とともにシャフトを受け入れる。その後、保持部材がシャフトの回転中心軸まわりに回転し、それにより、シャフトが凹部と突出部とによって回転可能に保持される。   The printer of the present invention includes a shaft holding mechanism that holds the shaft in cooperation with the support member and the holding member. The support member includes a first groove that receives the shaft, a concave portion that is continuous with the first groove and has a second groove that is wider than the first groove, and a hole portion that has a through hole adjacent to the concave portion and continuous with the second groove. have. The holding member is a through-hole insertion portion that is inserted into the through-hole, and a portion that is inserted into the second groove via the through-hole, protrudes from the through-hole insertion portion, and has a shape corresponding to the shaft. And a protrusion having a groove. After the holding member is inserted into the through hole and the second groove, the third groove receives the shaft together with the first groove. Thereafter, the holding member rotates around the rotation center axis of the shaft, whereby the shaft is rotatably held by the recess and the protrusion.

支持部材は係合部を有している。保持部材は係合部と係合する被係合部を有している。支持部材および保持部材がシャフトを保持する状態において、係合部と被係合部とは、互いに係合することによって、支持部材と保持部材との相対的な位置関係を固定する。保持部材は、シャフトとは反対側に突出し、かつ、シャフトの回転中心軸に対して垂直な方向に延びる操作部を有している。   The support member has an engaging portion. The holding member has an engaged portion that engages with the engaging portion. In a state where the support member and the holding member hold the shaft, the engaging portion and the engaged portion are engaged with each other, thereby fixing the relative positional relationship between the supporting member and the holding member. The holding member has an operation portion that protrudes on the opposite side of the shaft and extends in a direction perpendicular to the rotation center axis of the shaft.

操作部と被係合部とが一体的に設けられている。支持部材は、係合部とは異なる他の係合部を有している。第１溝および第３溝がシャフトを受け入れる状態において、他の係合部と被係合部とは、互いに係合することによって、支持部材と保持部材との相対的な位置関係を固定する。シャフトは、トナーが付着される感光ローラを帯電させるためのチャージローラのシャフトである。   The operation part and the engaged part are provided integrally. The support member has another engaging portion different from the engaging portion. In a state where the first groove and the third groove receive the shaft, the other engaging portion and the engaged portion are engaged with each other, thereby fixing the relative positional relationship between the support member and the holding member. The shaft is a shaft of a charge roller for charging a photosensitive roller to which toner is attached.

上記の構造によれば、以下に記載する各発明の効果の全てが得られる。   According to said structure, all the effects of each invention described below are acquired.

本発明のシャフト保持機構は、支持部材と保持部材とによって協働してシャフトを保持する。支持部材は、シャフトを受け入れる第１溝と第１溝に連続し第１溝よりも幅が大きな第２溝を有する凹部と、凹部に隣接し第２溝に連続する貫通孔を有する孔部とを有している。保持部材は、貫通孔に挿入される貫通孔挿入部と、貫通孔を介して第２溝に挿入される部位であって、貫通孔挿入部から突出しており、シャフトに対応した形状の第３溝を有する突出部とを有している。保持部材が貫通孔および第２溝に挿入された後、第３溝が第１溝とともにシャフトを受け入れる。その後、保持部材がシャフトの回転中心軸まわりに回転し、それにより、シャフトが凹部と突出部とによって回転可能に保持される。   The shaft holding mechanism of the present invention holds the shaft in cooperation with the support member and the holding member. The support member includes a first groove that receives the shaft, a concave portion that is continuous with the first groove and has a second groove that is wider than the first groove, and a hole portion that has a through hole adjacent to the concave portion and continuous with the second groove. have. The holding member is a through-hole insertion portion that is inserted into the through-hole, and a portion that is inserted into the second groove via the through-hole, protrudes from the through-hole insertion portion, and has a shape corresponding to the shaft. And a protrusion having a groove. After the holding member is inserted into the through hole and the second groove, the third groove receives the shaft together with the first groove. Thereafter, the holding member rotates around the rotation center axis of the shaft, whereby the shaft is rotatably held by the recess and the protrusion.

上記の構造によれば、シャフト保持機構へのシャフトの取り付けおよびシャフト保持機構からのシャフトの取外しが容易になる。   According to said structure, the attachment of the shaft to a shaft holding mechanism and the removal of the shaft from a shaft holding mechanism become easy.

また、支持部材は係合部を有し、保持部材は係合部と係合する被係合部を有し、支持部材および保持部材がシャフトを保持する状態において、係合部と被係合部とは、互いに係合することによって、支持部材と保持部材との相対的な位置関係を固定することが望ましい。   Further, the support member has an engaging portion, the holding member has an engaged portion that engages with the engaging portion, and the engaging member and the engaged portion are engaged when the supporting member and the holding member hold the shaft. It is desirable to fix the relative positional relationship between the support member and the holding member by engaging the portions with each other.

上記の構造によれば、保持部材と支持部材との位置関係が固定されるため、保持部材が支持部材から外れてしまったり、保持部材が貫通孔内で回転してしまったりして、シャフト保持機構がシャフトを保持できなくなるという不具合の発生が防止される。   According to the above structure, since the positional relationship between the holding member and the supporting member is fixed, the holding member may be detached from the supporting member, or the holding member may be rotated in the through hole, so that the shaft is held. Occurrence of a problem that the mechanism cannot hold the shaft is prevented.

また、支持部材が係合部とは異なる他の係合部を有し、第１溝および第３溝がシャフトを受け入れる状態において、他の係合部と被係合部とは、互いに係合することによって、支持部材と保持部材との相対的な位置関係を固定することが望ましい。   In addition, when the support member has another engaging portion different from the engaging portion, and the first groove and the third groove receive the shaft, the other engaging portion and the engaged portion are engaged with each other. By doing so, it is desirable to fix the relative positional relationship between the support member and the holding member.

上記の構造によれば、第１溝および第３溝がシャフトを受け入れるときに、支持部材と保持部材との位置関係のずれが防止されるため、シャフト保持機構へのシャフトの取り付けおよびシャフト保持機構からのシャフトの取外しが容易になる。   According to the above structure, since the positional relationship between the support member and the holding member is prevented when the first groove and the third groove receive the shaft, the shaft is attached to the shaft holding mechanism and the shaft holding mechanism. The shaft can be easily removed from.

また、保持部材は、シャフトとは反対側に突出し、かつ、シャフトの回転中心軸に対して垂直な方向に延びる操作部を有することが望ましい。この構造によれば、操作部をつまんで回転させるだけで、簡単にシャフトを保持することができる。また、操作部と被係合部とが一体的に設けられていれば、保持部材の構造がシンプルになる。   Moreover, it is desirable that the holding member has an operation portion that protrudes on the opposite side of the shaft and extends in a direction perpendicular to the rotation center axis of the shaft. According to this structure, the shaft can be easily held only by pinching and rotating the operation portion. Further, if the operation portion and the engaged portion are provided integrally, the structure of the holding member is simplified.

以下、図面を用いて、本発明の実施の形態のシャフト保持機構およびそれが用いられたプリンタを説明する。なお、各図面において同一の符号が付されている部位は、同一の構造および機能を有している。   Hereinafter, a shaft holding mechanism according to an embodiment of the present invention and a printer using the same will be described with reference to the drawings. In addition, the site | part to which the same code | symbol is attached | subjected in each drawing has the same structure and function.

実施の形態のプリンタは、レーザプリンタであって、図１に示すように、本体１と、本体１に対して出し入れ可能に設けられた用紙トレイ２と、用紙トレイ２内に収納された用紙が印刷の実行後に矢印Ｐで示す方向に排出される排出部３とを備えている。また、本体１内には、筐体４が設けられており、筐体４内には、用紙に印字するためのトナーが付着する円柱状の感光ドラム５が設けられている。また、感光ドラム５を帯電させるための円柱状のチャージローラ３０が感光ドラム５に接触するように設けられている。そのため、チャージローラ３０は感光ドラム５の回転に従って回転する。また、チャージローラ３０の２つの底面においては、それぞれ、中心位置から円柱状のシャフト３０ａ（図２参照）が突出している。   The printer according to the embodiment is a laser printer, and as shown in FIG. 1, a main body 1, a paper tray 2 provided so as to be able to be taken in and out of the main body 1, and paper stored in the paper tray 2. And a discharge unit 3 that discharges in the direction indicated by the arrow P after execution of printing. A casing 4 is provided in the main body 1, and a cylindrical photosensitive drum 5 to which toner for printing on paper is attached is provided in the casing 4. A cylindrical charge roller 30 for charging the photosensitive drum 5 is provided so as to contact the photosensitive drum 5. Therefore, the charge roller 30 rotates according to the rotation of the photosensitive drum 5. Further, on the two bottom surfaces of the charge roller 30, a cylindrical shaft 30a (see FIG. 2) protrudes from the center position.

また、図２に示すように、筐体４内にチャージローラ３０が挿入された後、チャージローラ３０に設けられたシャフト３０ａが筐体４の側面に設けられた開口から外部へ突出する。また、筐体４の外部に突出した一方のシャフト３０ａは、支持部材６０の貫通孔６０ａに挿入される。筐体４の外部に突出した他方のシャフト３０ａは、支持部材５０の貫通孔５１ａに挿入され、図３に示す保持部材７０および支持部材５０によって保持される。なお、保持部材７０は、支持部材５０の貫通孔５１ａ内に挿入され、軸周りに回転してシャフト３０ａを支持部材５０とともに保持する。   As shown in FIG. 2, after the charge roller 30 is inserted into the housing 4, the shaft 30 a provided on the charge roller 30 projects to the outside from the opening provided on the side surface of the housing 4. In addition, one shaft 30 a protruding outside the housing 4 is inserted into the through hole 60 a of the support member 60. The other shaft 30a protruding to the outside of the housing 4 is inserted into the through hole 51a of the support member 50 and is held by the holding member 70 and the support member 50 shown in FIG. The holding member 70 is inserted into the through hole 51 a of the support member 50 and rotates around the axis to hold the shaft 30 a together with the support member 50.

次に、図４および図５を用いて、本実施の形態のシャフト保持機構を構成する保持部材７０および支持部材５０をより具体的に説明する。   Next, the holding member 70 and the support member 50 constituting the shaft holding mechanism of the present embodiment will be described more specifically with reference to FIGS. 4 and 5.

保持部材７０は、図４に示すように、プレート状の円盤からなる貫通孔挿入部７１と、貫通孔挿入部７１の一方の主表面から突出した突出部７２と、貫通孔挿入部７１の一方の主表面とは反対の主表面から突出し、シャフト３０ａの軸に対して垂直に延びる操作部７３と、操作部７３の先端に設けられた折れ曲がり部７４と、折れ曲がり部７４の内側に設けられた被係合部７５とを備えている。貫通孔挿入部７１は貫通孔５１ａとほぼ同径であるため、貫通孔５１ａを塞ぐ。突出部７２内側には、貫通孔挿入部７１の主表面に対して垂直に延びる第３溝７２ａが設けられている。第３溝７２ａの形状は、シャフト３０ａの形状と対応している。また、突出部７２の横断面は、半円弧状である。言い換えれば、突出部７２は、円筒がその軸を通る平面で分割された２つの部材のうちの一方である。   As shown in FIG. 4, the holding member 70 includes a through-hole insertion portion 71 made of a plate-shaped disk, a protruding portion 72 protruding from one main surface of the through-hole insertion portion 71, and one of the through-hole insertion portions 71. Projecting from the main surface opposite to the main surface of the shaft 30a and extending perpendicularly to the axis of the shaft 30a, a bent portion 74 provided at the tip of the operating portion 73, and provided inside the bent portion 74. And an engaged portion 75. Since the through hole insertion portion 71 has substantially the same diameter as the through hole 51a, the through hole 51a is closed. A third groove 72 a extending perpendicularly to the main surface of the through hole insertion portion 71 is provided inside the protrusion 72. The shape of the third groove 72a corresponds to the shape of the shaft 30a. Moreover, the cross section of the protrusion part 72 is a semicircular arc shape. In other words, the protrusion 72 is one of the two members divided by a plane passing through the axis of the cylinder.

また、図５に示すように、支持部材５０は、その先端部において、支持部材５０が延びる方向と垂直な方向に延びる第１溝５２ａおよび第２溝５２ｂ、ならびに、第１溝５２ａと第２溝５２ｂとの境界である端面５２ｃを有する凹部５２と、第１溝５２ａおよび第２溝５２ｂに連続する貫通孔５１ａを有する孔部５１と備えている。孔部５１は、円筒状であり、貫通孔５１ａには、貫通孔挿入部７１が挿入される。凹部５２の第１溝５２ａは、シャフト３０ａの円柱状の外周面に対応しており、シャフト３０ａを受け入れる。また、凹部５２の第２溝５２ｂは、貫通孔５１ａに隣接しており、貫通孔５１ａと同軸の円柱の外周面の一部を有している。第１溝５２ａと第２溝５２ｂとは、端面５２ｃを介して、段差を有している。また、第２溝５２ｂの幅は、第１溝５２ａの幅よりも大きい。つまり、第２溝５２ｂに嵌り込む円柱は、第１溝５２ａに嵌り込む円柱に比較して、径が大きい。また、第１溝５２ａに嵌り込む円柱と第２溝５２ｂに嵌り込む円柱とは同軸である。   Further, as shown in FIG. 5, the support member 50 has a first groove 52 a and a second groove 52 b extending in a direction perpendicular to the direction in which the support member 50 extends, and the first groove 52 a and the second groove at the distal end thereof. A recess 52 having an end face 52c that is a boundary with the groove 52b and a hole 51 having a through hole 51a continuous with the first groove 52a and the second groove 52b are provided. The hole 51 is cylindrical, and the through-hole insertion part 71 is inserted into the through-hole 51a. The first groove 52a of the recess 52 corresponds to the cylindrical outer peripheral surface of the shaft 30a and receives the shaft 30a. Moreover, the 2nd groove | channel 52b of the recessed part 52 is adjacent to the through-hole 51a, and has a part of outer peripheral surface of the cylinder coaxial with the through-hole 51a. The first groove 52a and the second groove 52b have a step through the end face 52c. The width of the second groove 52b is larger than the width of the first groove 52a. In other words, the cylinder fitted into the second groove 52b has a larger diameter than the cylinder fitted into the first groove 52a. Further, the cylinder fitted into the first groove 52a and the cylinder fitted into the second groove 52b are coaxial.

また、貫通孔５１ａは、保持部材７０が挿入される孔であって、保持部材７０の貫通孔挿入部７１の外周の円形に対応した形状である。また、孔部５１の外周面においては、互いに対向する位置であって、凹部５２が設けられている側と凹部５２がない側とに、それぞれ、穴部からなる係合部５１ｃおよび係合部５１ｂが設けられている。   The through hole 51 a is a hole into which the holding member 70 is inserted, and has a shape corresponding to the circular shape of the outer periphery of the through hole insertion portion 71 of the holding member 70. In addition, on the outer peripheral surface of the hole 51, the engaging portion 51c and the engaging portion each formed of a hole are provided at positions facing each other on the side where the concave portion 52 is provided and the side where the concave portion 52 is not provided. 51b is provided.

次に、図６〜図９を用いて、本発明のシャフト保持機構の保持部材７０および支持部材５０のシャフト保持のときの状態を説明する。   Next, the state at the time of the shaft holding of the holding member 70 and the support member 50 of the shaft holding mechanism of this invention is demonstrated using FIGS.

保持部材７０が、支持部材５０に挿入されるときには、図６に示すように、保持部材７０の突出部７２が、保持部材７０の孔部５１の貫通孔５２ａを介して、第２溝５２ｂに挿入される。それにより、突出部７２の端面７２ｂと凹部５２の端面５２ｃとがほぼ接触する程度まで接近する。この状態においては、第１溝５２ａおよび第３溝７２ａのそれぞれは、シャフト３０ａを受け入れることが可能である。また、図７に示すように、保持部材７０の折れ曲がり部７４の内側に被係合部７５が設けられている。被係合部７５は突起からなっている。また、被係合部７５が、孔部５１の外周面に設けられた係合部５１ｂと係合している。この図７に示す状態は仮止め状態である。このような仮止め状態にするのは、保持部材７０が支持部材５０に挿入された状態で、支持部材５０の孔部５１の貫通孔５１ａの中で保持部材７０が回転しないようにすることによって、シャフト保持機構の取り扱いを容易にするためである。   When the holding member 70 is inserted into the support member 50, the protrusion 72 of the holding member 70 is inserted into the second groove 52b via the through hole 52a of the hole 51 of the holding member 70 as shown in FIG. Inserted. Thereby, the end surface 72b of the protrusion 72 and the end surface 52c of the recess 52 are brought close to contact with each other. In this state, each of the first groove 52a and the third groove 72a can receive the shaft 30a. Further, as shown in FIG. 7, an engaged portion 75 is provided inside the bent portion 74 of the holding member 70. The engaged portion 75 is a protrusion. Further, the engaged portion 75 is engaged with an engaging portion 51 b provided on the outer peripheral surface of the hole 51. The state shown in FIG. 7 is a temporarily fixed state. Such a temporarily fixed state is achieved by preventing the holding member 70 from rotating in the through hole 51a of the hole 51 of the support member 50 in a state where the holding member 70 is inserted into the support member 50. This is to facilitate handling of the shaft holding mechanism.

この状態で、次に、操作部７３を作業員が手でつまみ１８０°回転させる。その結果、図８に示す状態となる。図８に示す状態においては、保持部材７０の突出部７２は、図７に示す状態からシャフト３０ａの回転中心軸まわりに１８０°回転した状態になっている。したがって、シャフト３０ａは、凹部５２と突出部７２とによって回転可能に保持されている。   In this state, the operator then manually rotates the operation unit 73 by 180 °. As a result, the state shown in FIG. 8 is obtained. In the state shown in FIG. 8, the protrusion 72 of the holding member 70 is in a state rotated 180 ° around the rotation center axis of the shaft 30a from the state shown in FIG. Therefore, the shaft 30 a is rotatably held by the recess 52 and the protrusion 72.

また、図８に示す状態において、被係合部７５は、仮止め状態のときとは異なり、係合部５１ｂと係合している。この状態が本止め状態である。この状態では、図９に示すように、シャフト３０ａは保持部材７０の突出部７２に支持されており、被係合部７５は本発明の係合部としての係合部５１ｂに係止されている。したがって、保持部材７０と支持部材５０とは互いの位置関係が固定されている。   Further, in the state shown in FIG. 8, the engaged portion 75 is engaged with the engaging portion 51b, unlike the temporarily fixed state. This state is the final stop state. In this state, as shown in FIG. 9, the shaft 30a is supported by the protruding portion 72 of the holding member 70, and the engaged portion 75 is locked by the engaging portion 51b as the engaging portion of the present invention. Yes. Therefore, the positional relationship between the holding member 70 and the support member 50 is fixed.

また、前述の保持部材７０の支持部材５０への挿入過程および保持部材７０の支持部材５０内での回転過程を図６〜図８の視点とは異なる視点で見ると、図１０〜図１２に示すようなものとなる。まず、図１０に示すように、矢印Ｙで示す方向に保持部材７０が支持部材５０の貫通孔５１ａに挿入される。それにより、図１１に示すように、孔部５１の外周面に設けられた係合部５１ｂと保持部材７０の折れ曲がり部７４の内側に設けられた被係合部７５とが嵌り合って、シャフト保持機構は仮止め状態となる。その後、作業員が、貫通孔５１ａ内で、図１１の矢印Ｚで示す方向に保持部材７０を回転させる。その結果、図１２に示すように、保持部材７２の突出部７２の外周面が露出する。このとき、孔部５１の外周面に設けられた係合部５１ｃと保持部材７０の折れ曲がり部７４の内側に設けられた被係合部７５とが嵌り合って、シャフト保持機構は本止め状態となる。   Further, when the process of inserting the holding member 70 into the support member 50 and the rotation process of the holding member 70 in the support member 50 are viewed from a viewpoint different from the viewpoints of FIGS. As shown. First, as shown in FIG. 10, the holding member 70 is inserted into the through hole 51 a of the support member 50 in the direction indicated by the arrow Y. Accordingly, as shown in FIG. 11, the engaging portion 51b provided on the outer peripheral surface of the hole 51 and the engaged portion 75 provided on the inner side of the bent portion 74 of the holding member 70 are fitted to each other, and the shaft The holding mechanism is temporarily stopped. Thereafter, the worker rotates the holding member 70 in the direction indicated by the arrow Z in FIG. 11 in the through hole 51a. As a result, as shown in FIG. 12, the outer peripheral surface of the protrusion 72 of the holding member 72 is exposed. At this time, the engaging portion 51c provided on the outer peripheral surface of the hole portion 51 and the engaged portion 75 provided on the inner side of the bent portion 74 of the holding member 70 are fitted to each other, and the shaft holding mechanism is in the fully stopped state. Become.

なお、保持部材７０がシャフト３０ａの回転中心軸まわりに回転するときには、操作部７３および折れ曲がり部７４は弾性変形する。それにより、被係合部７５の先端が孔部５１の外周面に接触しながら保持部材７０が回転し、最終的には、被係合部７５が係合部５１ｂおよび５１ｃのいずれかに嵌め込まれる。したがって、被係合部７５は、係合部５１ｂおよび５１ｃに対して出入り容易な曲面形状であることが望ましい。   Note that when the holding member 70 rotates about the rotation center axis of the shaft 30a, the operation portion 73 and the bent portion 74 are elastically deformed. Thereby, the holding member 70 rotates while the tip of the engaged portion 75 is in contact with the outer peripheral surface of the hole 51, and finally the engaged portion 75 is fitted into one of the engaging portions 51b and 51c. It is. Therefore, it is desirable that the engaged portion 75 has a curved shape that allows easy entry and exit with respect to the engaging portions 51b and 51c.

また、前述のシャフト３０ａの支持部材５０および保持部材７０による保持過程を前述の視点とは異なる視点で見てみると、図１３に示すようなものになる。図１３に示すように、シャフト３０ａは、まず、矢印Ｘで示すように、支持部材５０の凹部５２の第１溝５２ａに当接するように挿入される。次に、印Ｙで示す方向に、保持部材７０が支持部材５０の貫通孔５１ａ内へ挿入される。それにより、貫通孔挿入部７１は貫通孔５１ａに挿入され、突出部７２は第２溝５２ｂに挿入される。その結果、突出部７２と凹部５２との互いの端面７２ｂおよび５２ｃがほぼ当接する程度まで接近する。このとき、折れ曲がり部７４の内側に設けられた被係合部７５と係合部５１ｂとが係合し、シャフト保持機構は仮止め状態となる。次に、作業者が操作部７３をつまんで矢印Ｚで示す方向に保持部材７０を１８０°回転させると、図１２で示すように突出部７２の外周面が露出する。このとき、操作部７３の折れ曲がり部７４の内側に設けられた被係合部７５が係合部５１ｃと係合し、シャフト保持機構は本止め状態となる。   Further, when the holding process of the shaft 30a by the support member 50 and the holding member 70 is viewed from a viewpoint different from the viewpoint described above, it is as shown in FIG. As shown in FIG. 13, the shaft 30 a is first inserted so as to abut on the first groove 52 a of the recess 52 of the support member 50 as indicated by an arrow X. Next, the holding member 70 is inserted into the through hole 51 a of the support member 50 in the direction indicated by the mark Y. Thereby, the through-hole insertion part 71 is inserted into the through-hole 51a, and the protrusion 72 is inserted into the second groove 52b. As a result, the end surfaces 72b and 52c of the projecting portion 72 and the recessed portion 52 approach each other until they substantially contact each other. At this time, the engaged portion 75 provided on the inner side of the bent portion 74 is engaged with the engaging portion 51b, and the shaft holding mechanism is temporarily stopped. Next, when the operator pinches the operation part 73 and rotates the holding member 70 in the direction indicated by the arrow Z, the outer peripheral surface of the protruding part 72 is exposed as shown in FIG. At this time, the engaged portion 75 provided on the inner side of the bent portion 74 of the operation portion 73 engages with the engaging portion 51c, and the shaft holding mechanism is in a fully stopped state.

上記のような本実施の形態のシャフト保持機構によれば、従来技術のように、支持部材５０を撓ませて貫通孔５１ａにシャフト３０ａを挿入する必要がないため、シャフト保持機構へのシャフト３０ａの取り付けおよびシャフト保持機構からのシャフト３０ａの取外しが容易になる。また、本止め状態においては、保持部材７０と支持部材５０との位置関係が係合部５１ｃと被係合部７５とによって固定されるため、保持部材７０が支持部材５０から外れてしまい、シャフト保持機構がシャフト３０ａを保持できなくなるという不具合の発生が防止される。また、支持部材５０は、係合部５１ｃ以外に係合部５１ｂを有しており、係合部５１ｂと被係合部７５とが、互いに係合することによって、支持部材５０と保持部材７０との相対的な位置関係が固定される。そのため、第１溝５２ａおよび第３溝７２ａがシャフト３０ａを受け入れるときに、保持部材７０と支持部材５０とが仮止め状態となり、支持部材５０と保持部材７０との位置関係のずれが防止される。その結果、シャフト保持機構へのシャフト３０ａの取り付けおよびシャフト保持機構からのシャフト３０ａの取外しがさらに容易になる。また、保持部材７０がシャフト３０ａの軸に対して垂直に延びる操作部７３を有しているため、作業員は操作部７３をつまんで回転させるだけでシャフト３０ａをシャフト保持機構に保持させることができる。また、操作部７３と被係合部７５とが同一部材の一体成形によって形成されているため、保持部材７０の構造がシンプルになっている。   According to the shaft holding mechanism of the present embodiment as described above, there is no need to bend the support member 50 and insert the shaft 30a into the through hole 51a as in the prior art, so the shaft 30a to the shaft holding mechanism is not necessary. And the shaft 30a can be easily detached from the shaft holding mechanism. Further, in the final stop state, the positional relationship between the holding member 70 and the supporting member 50 is fixed by the engaging portion 51c and the engaged portion 75, so that the holding member 70 is detached from the supporting member 50, and the shaft Occurrence of a problem that the holding mechanism cannot hold the shaft 30a is prevented. Further, the support member 50 has an engagement portion 51b in addition to the engagement portion 51c, and the engagement portion 51b and the engaged portion 75 are engaged with each other, whereby the support member 50 and the holding member 70 are engaged. The relative positional relationship with is fixed. Therefore, when the first groove 52a and the third groove 72a receive the shaft 30a, the holding member 70 and the support member 50 are temporarily fixed, and the positional relationship between the support member 50 and the holding member 70 is prevented from being shifted. . As a result, the attachment of the shaft 30a to the shaft holding mechanism and the removal of the shaft 30a from the shaft holding mechanism are further facilitated. Moreover, since the holding member 70 has the operation part 73 extended perpendicularly | vertically with respect to the axis | shaft of the shaft 30a, an operator can hold | maintain the shaft 30a in a shaft holding mechanism only by pinching and rotating the operation part 73. it can. Moreover, since the operation part 73 and the to-be-engaged part 75 are formed by integral molding of the same member, the structure of the holding member 70 is simple.

上述の本実施の形態のシャフト保持機構は、保持部材７０に操作部７３が設けられているが、操作部７３を有しておらず、保持部材７０が支持部材５０に挿入された状態で、貫通孔挿入部７１が孔部５１の表面から突出しており、作業員が貫通孔挿入部７１の外周を握って回すようなシャフト保持機構であってもよい。また、本実施の形態のシャフト保持機構は、支持部材５０が係合部５１ｃおよび５１ｂを有し、保持部材５０が被係合部７５を有しているが、係合部５１ｃおよび５１ｂならびに被係合部７５を有しておらず、貫通孔挿入部７１と貫通孔５１ａとがほぼ同径であり、貫通孔挿入部７１の外周面と孔部５１の内周面との間の摩擦力によって、保持部材７０と支持部材５０との相対的位置関係が固定されるシャフト保持機構であってもよい。   In the shaft holding mechanism of the present embodiment described above, the operation member 73 is provided on the holding member 70, but the operation member 73 is not provided and the holding member 70 is inserted into the support member 50. The shaft holding mechanism may be such that the through hole insertion portion 71 protrudes from the surface of the hole portion 51 and an operator grips and rotates the outer periphery of the through hole insertion portion 71. In the shaft holding mechanism of the present embodiment, the support member 50 has the engaging portions 51c and 51b, and the holding member 50 has the engaged portion 75. However, the engaging portions 51c and 51b and the covered portion The engaging portion 75 is not provided, and the through hole insertion portion 71 and the through hole 51 a have substantially the same diameter, and the frictional force between the outer peripheral surface of the through hole insertion portion 71 and the inner peripheral surface of the hole portion 51. Thus, a shaft holding mechanism in which the relative positional relationship between the holding member 70 and the support member 50 is fixed may be used.

なお、今回開示された実施の形態はすべての点で例示であって制限的なものではないと考えられるべきである。本発明の範囲は上記した説明ではなくて特許請求の範囲によって示され、特許請求の範囲と均等の意味および範囲内でのすべての変更が含まれていることが意図される。   The embodiment disclosed this time should be considered as illustrative in all points and not restrictive. The scope of the present invention is defined by the terms of the claims, rather than the description above, and is intended to include any modifications within the scope and meaning equivalent to the terms of the claims.

実施の形態のプリンタの斜視図である。1 is a perspective view of a printer according to an embodiment. 実施の形態のチャージローラが挿入される筐体およびチャージローラを説明するための図である。It is a figure for demonstrating the housing | casing in which the charge roller of embodiment is inserted, and a charge roller. 実施の形態の支持部材および保持部材の側面図である。It is a side view of the supporting member and holding member of an embodiment. 図６のＩＶ−ＩＶ線断面図である。It is the IV-IV sectional view taken on the line of FIG. 図６のＶ−Ｖ線断面図である。It is the VV sectional view taken on the line of FIG. 図４および図５のＶＩ−ＶＩ線断面を示す図である。It is a figure which shows the VI-VI line cross section of FIG. 4 and FIG. 支持部材に保持部材が挿入された直後の仮止め状態を説明するための図である。It is a figure for demonstrating the temporary fix | stop state immediately after a holding member is inserted in a support member. 支持部材内で保持部材が回転した後の本止め状態を説明するための図である。It is a figure for demonstrating the final stop state after a holding member rotates within a supporting member. 図８の矢印ＩＸで示す方向に沿ってシャフト保持機構を見たときのシャフト保持機構の側面図である。FIG. 9 is a side view of the shaft holding mechanism when the shaft holding mechanism is viewed along a direction indicated by an arrow IX in FIG. 8. 支持部材への保持部材の挿入方向を説明するための図である。It is a figure for demonstrating the insertion direction of the holding member to a supporting member. 支持部材内に挿入された保持部材の回転方向を説明するための図である。It is a figure for demonstrating the rotation direction of the holding member inserted in the support member. 支持部材内で保持部材が回転した後の本止め状態を説明するための斜視図である。It is a perspective view for demonstrating the final stop state after a holding member rotates within a supporting member. 支持部材へのシャフトの挿入方向、支持部材への保持部材の挿入方向、および支持部材内での保持部材の回転方向を説明するための図である。It is a figure for demonstrating the insertion direction of the shaft to a supporting member, the insertion direction of the holding member to a supporting member, and the rotation direction of the holding member within a supporting member.

符号の説明Explanation of symbols

１ 本体、３０ チャージローラ、３０ａ シャフト、４ 筐体、５０ 支持部材、５１ 孔部、５２ 凹部、５１ａ 貫通孔、５２ａ 第１溝、５２ｂ 第２溝、５１ｂ，５１ｃ 係合部、７０ 保持部材、７１ 貫通孔挿入部、７２ 突出部、７２ａ 第３溝、７３ 操作部、７４ 折れ曲がり部、７５ 被係合部。   DESCRIPTION OF SYMBOLS 1 Main body, 30 Charge roller, 30a Shaft, 4 Housing | casing, 50 Support member, 51 Hole part, 52 Recessed part, 51a Through hole, 52a 1st groove | channel, 52b 2nd groove | channel, 51b, 51c Engagement part, 70 Holding member, 71 through-hole insertion part, 72 protrusion part, 72a 3rd groove | channel, 73 operation part, 74 bending part, 75 engaged part.

Claims (6)

支持部材と保持部材とによって協働してシャフトを保持するシャフト保持機構を備え、
前記支持部材は、
シャフトを受け入れる第１溝と前記第１溝に連続し前記第１溝よりも幅が大きな第２溝を有する凹部と、
前記凹部に隣接し前記第２溝に連続する貫通孔を有する孔部とを有し、
前記保持部材は、
前記貫通孔に挿入される貫通孔挿入部と、
前記貫通孔を介して前記第２溝に挿入される部位であって、前記貫通孔挿入部から突出しており、前記シャフトに対応した形状の第３溝を有する突出部とを有し、
前記保持部材が前記貫通孔および前記第２溝に挿入された後、前記第３溝が前記第１溝とともに前記シャフトを受け入れ、
その後、前記保持部材が前記シャフトの回転中心軸まわりに回転し、それにより、前記シャフトが前記凹部と前記突出部とによって回転可能に保持され、
前記支持部材は係合部を有し、
前記保持部材は前記係合部と係合する被係合部を有し、
前記支持部材および前記保持部材が前記シャフトを保持する状態において、前記係合部と前記被係合部とは、互いに係合することによって、前記支持部材と前記保持部材との相対的な位置関係を固定し、
前記保持部材は、前記シャフトとは反対側に突出し、かつ、前記シャフトの前記回転中心軸に対して垂直な方向に延びる操作部を有し、
前記操作部と前記被係合部とが一体的に設けられ、
前記支持部材は、前記係合部とは異なる他の係合部を有し、
前記第１溝および前記第３溝が前記シャフトを受け入れる状態において、前記他の係合部と前記被係合部とは、互いに係合することによって、前記支持部材と前記保持部材との相対的な位置関係を固定し、
前記シャフトは、トナーが付着される感光ローラを帯電させるためのチャージローラのシャフトである、プリンタ。 A shaft holding mechanism for holding the shaft in cooperation with the support member and the holding member;
The support member is
A first groove for receiving a shaft, and a recess having a second groove that is continuous with the first groove and has a width larger than the first groove;
Having a through hole adjacent to the recess and having a through hole continuing to the second groove;
The holding member is
A through hole insertion portion to be inserted into the through hole;
A portion to be inserted into the second groove through the through-hole, protruding from the through-hole insertion portion, and having a third groove having a shape corresponding to the shaft,
After the holding member is inserted into the through hole and the second groove, the third groove receives the shaft together with the first groove,
Thereafter, the holding member rotates around the rotation center axis of the shaft, whereby the shaft is rotatably held by the recess and the protrusion,
The support member has an engaging portion;
The holding member has an engaged portion that engages with the engaging portion,
In a state in which the support member and the holding member hold the shaft, the engaging portion and the engaged portion are engaged with each other, whereby a relative positional relationship between the supporting member and the holding member is obtained. Fixed,
The holding member has an operation portion that protrudes on the opposite side of the shaft and extends in a direction perpendicular to the rotation center axis of the shaft,
The operation portion and the engaged portion are provided integrally,
The support member has another engaging portion different from the engaging portion,
In the state in which the first groove and the third groove receive the shaft, the other engaging portion and the engaged portion are engaged with each other, so that the support member and the holding member are relative to each other. Fixed positional relationship,
The shaft is a printer roller shaft for charging a photosensitive roller to which toner is attached. 支持部材と保持部材とによって協働してシャフトを保持するシャフト保持機構であって、
前記支持部材は、
シャフトを受け入れる第１溝と前記第１溝に連続し前記第１溝より幅が大きな第２溝を有する凹部と、
前記凹部に隣接し前記第２溝に連続する貫通孔を有する孔部とを有し、
前記保持部材は、
前記貫通孔に挿入される貫通孔挿入部と、
前記貫通孔を介して前記第２溝に挿入される部位であって、前記貫通孔挿入部から突出しており、前記シャフトに対応した形状の第３溝を有する突出部とを有し、
前記保持部材が前記貫通孔および前記第２溝に挿入された後、前記第３溝が前記第１溝とともに前記シャフトを受け入れ、
その後、前記保持部材が前記シャフトの回転中心軸まわりに回転し、それにより、前記シャフトが前記凹部と前記突出部とによって回転可能に保持される、シャフト保持機構。 A shaft holding mechanism for holding the shaft in cooperation with the support member and the holding member,
The support member is
A first groove for receiving a shaft, and a recess having a second groove that is continuous with the first groove and has a width greater than the first groove;
Having a through hole adjacent to the recess and having a through hole continuing to the second groove;
The holding member is
A through hole insertion portion to be inserted into the through hole;
A portion to be inserted into the second groove through the through-hole, protruding from the through-hole insertion portion, and having a third groove having a shape corresponding to the shaft,
After the holding member is inserted into the through hole and the second groove, the third groove receives the shaft together with the first groove,
Then, the shaft holding mechanism in which the holding member rotates around the rotation center axis of the shaft, and thereby the shaft is rotatably held by the recess and the protrusion. 前記支持部材は係合部を有し、
前記保持部材は前記係合部と係合する被係合部を有し、
前記支持部材および前記保持部材が前記シャフトを保持する状態において、前記係合部と前記被係合部とは、互いに係合することによって、前記支持部材と前記保持部材との相対的な位置関係を固定する、請求項２に記載のシャフト保持機構。 The support member has an engaging portion;
The holding member has an engaged portion that engages with the engaging portion,
In a state in which the support member and the holding member hold the shaft, the engaging portion and the engaged portion are engaged with each other, whereby a relative positional relationship between the supporting member and the holding member is obtained. The shaft holding mechanism according to claim 2, wherein the shaft is fixed. 前記支持部材は、前記係合部とは異なる他の係合部を有し、
前記第１溝および前記第３溝が前記シャフトを受け入れる状態において、前記他の係合部と前記被係合部とは、互いに係合することによって、前記支持部材と前記保持部材との相対的な位置関係を固定する、請求項３に記載のシャフト保持機構。 The support member has another engaging portion different from the engaging portion,
In the state in which the first groove and the third groove receive the shaft, the other engaging portion and the engaged portion are engaged with each other, so that the support member and the holding member are relative to each other. The shaft holding mechanism according to claim 3, wherein the positional relationship is fixed. 前記保持部材は、前記シャフトとは反対側に突出し、かつ、前記シャフトの前記回転中心軸に対して垂直な方向に延びる操作部を有する、請求項２に記載のシャフト保持機構。   The shaft holding mechanism according to claim 2, wherein the holding member has an operation portion that protrudes on a side opposite to the shaft and extends in a direction perpendicular to the rotation center axis of the shaft. 前記支持部材は係合部を有し、
前記保持部材は前記係合部と係合する被係合部を有し、
前記支持部材および前記保持部材が前記シャフトを保持する状態において、前記係合部と前記被係合部とは、互いに係合ことによって、前記支持部材と前記保持部材との相対的な位置関係を固定し、
前記保持部材は、前記シャフトとは反対側に突出し、かつ、前記シャフトの前記回転中心軸に対して垂直な方向に延びる操作部を有し、
前記操作部と前記被係合部とが一体的に設けられた、請求項２に記載のシャフト保持機構。 The support member has an engaging portion;
The holding member has an engaged portion that engages with the engaging portion,
In the state in which the support member and the holding member hold the shaft, the engaging portion and the engaged portion are engaged with each other, whereby the relative positional relationship between the support member and the holding member is established. Fixed,
The holding member has an operation portion that protrudes on the opposite side of the shaft and extends in a direction perpendicular to the rotation center axis of the shaft,
The shaft holding mechanism according to claim 2, wherein the operation portion and the engaged portion are provided integrally.
JP2005061135A 2005-03-04 2005-03-04 Shaft holding mechanism and printer provided with the same Withdrawn JP2006243529A (en)

Priority Applications (1)

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Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
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Publications (1)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2020115242A (en) * 2020-04-30 2020-07-30 キヤノン株式会社 Cartridge and image forming apparatus

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2020115242A (en) * 2020-04-30 2020-07-30 キヤノン株式会社 Cartridge and image forming apparatus
JP7140794B2 (en) 2020-04-30 2022-09-21 キヤノン株式会社 Cartridge and image forming device

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