KR200437165Y1 - Device for installing and separating drum from catridge for display forming apparatus - Google Patents

Abstract

The present invention relates to a mechanism for attaching and detaching a photosensitive drum to a cartridge fixing hole of an image forming apparatus, wherein a projection protrudes in an outer circumferential direction of one end so that the other end is inserted into the photosensitive drum while the projection is caught on the tip of the photosensitive drum. A cylinder having a receiving space with an opening toward the tip; A shaft configured to be movable in the longitudinal direction of the photosensitive drum in the accommodation space such that one end protrudes out of the opening or is concealed into the opening; An elastic body to which an elastic restoring force is applied to protrude the shaft into the opening; And the shaft protrudes into the opening and is inserted into the cartridge fixing hole so as to pivotally support the photosensitive drum, thereby making it easier to mount the photosensitive drum on the cartridge for the image forming apparatus, and to cut the photosensitive drum. Provided is a photosensitive drum detachment mechanism for a cartridge for an image forming apparatus that can easily detach a photosensitive drum from a cartridge even without a process or a process of forcibly disengaging an engaged portion.

Cartridge, photosensitive drum, image forming apparatus, shaft, cylinder

Description

Photosensitive drum detaching mechanism of cartridge for image forming apparatus {DEVICE FOR INSTALLING AND SEPARATING DRUM FROM CATRIDGE FOR DISPLAY FORMING APPARATUS}

1 is a perspective view showing a mounting shape of a photosensitive drum of a conventional cartridge for an image forming apparatus;

2 is an exploded side cross-sectional view of the photosensitive drum detaching mechanism of the cartridge for the image forming apparatus according to the first embodiment of the present invention;

Figure 3 is a side cross-sectional view showing the shape of the cylinder of Figure 2

4 is a perspective view showing the shaft shape of FIG.

5 is an assembled side cross-sectional view of FIG.

6 is an exploded side sectional view of the photosensitive drum detaching mechanism of the cartridge for the image forming apparatus according to the second embodiment of the present invention;

7 is a perspective view showing the shape of the first cylinder of FIG.

8 is a perspective view showing the shape of the second cylinder of FIG.

9 is a perspective view showing the shape of the shaft of FIG.

10 to 12 are side cross-sectional views showing the assembled shape of the detachable mechanism of FIG.

Figure 13 is an exploded side cross-sectional view of the photosensitive drum detaching mechanism of the cartridge for the image forming apparatus according to the third embodiment of the present invention.

14 is a perspective view showing the shape of the cylinder of FIG.

FIG. 15 is an exploded view showing the inner circumferential surface of the cylinder of FIG.

Fig. 16 is a perspective view showing the shape of the shaft of Fig. 13

Fig. 17 is a side sectional view showing the assembled shape of the detaching mechanism of Fig. 13;

18 is an exploded side cross-sectional view of the photosensitive drum detaching mechanism of the cartridge for the image forming apparatus according to the fourth embodiment of the present invention;

Fig. 19 is a rear view of the cylinder as seen from A-A of Fig. 18;

FIG. 20 is a front view of the shaft seen from B-B of FIG. 18

** Description of symbols for the main parts of the drawing **

2 ': cartridge 2: cartridge holder

10: photosensitive drum 100,200,300,400: drum detaching mechanism

110: cylinder 111: receiving space

112: flange 113: locking jaw

114: coupling male thread 115: fixed position female thread

120: shaft 121: spring receiving portion

122: protrusion 123: male thread portion

124: (+) groove 130: coil spring

140: coupling member 141: coupling female screw portion

210: first cylinder 211: accommodation space

212: guide rail 213: coupling groove

220: second cylinder 221: through hole

222: locking groove 223: engaging projection

224: flange 230: shaft

231: guide protrusion 232: grip rod

310: cylinder 311: receiving space

312: guide rail 312b: extension rail

313: flange 320: shaft

321: guide protrusion 322: grip rod

410: cylinder 411: receiving space

412: flange 413: locking jaw

414: coupling male threaded portion 415: guide rail

420: shaft 421: spring receiving portion

422: protrusion 423: rail receiving groove

424: (+) groove 430: coil spring

440: coupling member 441: coupling female thread portion

The present invention relates to a photosensitive drum detachment mechanism of a cartridge for an image forming apparatus, and more particularly, a user can easily and easily install a photosensitive drum on a cartridge, A photosensitive drum detachment mechanism of a cartridge for an image forming apparatus that facilitates separation of a photosensitive drum without the troublesome work of cutting the photosensitive drum upon replacement.

In general, an image forming apparatus is a device for forming a character or an image on paper or the like, such as a copier, a laser printer, an inkjet printer, an LED printer, a facsimile or the like. An image forming apparatus for forming a character or an image on paper or the like necessarily includes a cartridge, which includes an organic photo conductor (OPC) drum, a charging unit, a cleaning unit, and an exposure unit. It consists of a writing unit and a developing unit.

The image forming apparatus configured as described above is operated to cause photosensitization when charge reaches the organophotoreceptor (OPC) drum, and after the toner is electrodeposited on the photosensitive portion, the toner is transferred onto paper and heat is applied to fix the image on the paper.

The organophotoreceptor drum (hereinafter, simply referred to as "photosensitive drum") is a main component of the cartridge for the image forming apparatus, and the toner electrodeposited on the photosensitive drum is transferred to the top by rotating with the driving force transmitted from the cartridge.

As shown in FIG. 1, the photosensitive drum is rotatably supported by a fixing hole 2 formed in the cartridge 2 'in the form of an idler whose one side 30 does not receive a driving force, and the other side 11 of the photosensitive drum. The driving force is transmitted through the driving gear 20 to be rotatably driven while being supported by the cartridge 2 '.

Here, one side 30 of the photosensitive drum 10 is coupled to the flange 31 which is not receiving the driving force, the drum shaft 30 provided on the outside of the flange 31 is inserted into the fixing hole (2) of the cartridge Thus, the photosensitive drum 10 is rotatably supported.

On the other hand, high pressure is applied to the photosensitive drum 10 on the outer circumferential surface in order to transfer the electrodeposited toner on paper, and the pressure is transmitted to the shafts 11 and 30 of the drum 10 as it is, thereby generating frictional heat. Not only 11 and 30 are deformed, but also damage is done to the photosensitive drum 10 itself. Therefore, there is a need to replace the photosensitive drum 10 of the cartridge 2 'after using the photosensitive drum 10 for a period of time.

However, as shown in FIG. 1, the flange 31 is integrally coupled to the photosensitive drum 10 in an inseparable form, or the flange 31 is press-fitted to the photosensitive drum 10, such as bonding or bonding. When coupled by a permanent bonding method, in order to replace the photosensitive drum 10 had a limit that must go through a cumbersome operation such as cutting the photosensitive drum 10.

Likewise, if the service life of the photosensitive drum 10 remains, but it requires replacement of components such as the shafts 11 and 31 which rotatably support it, the cartridge itself may be completely disassembled or the photosensitive drum may be replaced for replacement. Since it is necessary to cut (10), the photosensitive drum, which still has a service life, has to be discarded, causing pollution of the environment and unnecessarily excessive maintenance costs.

The present invention has been made to solve the above problems, it is not only easy to mount the photosensitive drum to the image forming apparatus cartridge, but also to forcibly separate the cutting process of the photosensitive drum or the forced fitting portion, etc. It is an object of the present invention to provide a photosensitive drum detaching mechanism of a cartridge for an image forming apparatus, which makes it possible to easily separate a photosensitive drum from a cartridge even if there is no process.

To this end, the present invention eliminates permanent forms of bonding, such as bonding, welding, interference fitting, etc., which is virtually impossible to separate once combined, and constitutes such that the components are combined only by threading or screwing together. The purpose.

In addition, another object of the present invention is to eliminate the problem that the coupling quality is different according to the ability of the operator by excluding the permanent form of the coupling method.

In addition, the present invention is to prevent physical damage of the peripheral components in the process of disassembling the photosensitive drum, so that all the components around the photosensitive drum can be reused even after disassembling the photosensitive drum.

In addition, another object of the present invention is to manufacture a detachable mechanism of a photosensitive drum in the form of a module, thereby reducing manufacturing costs by significantly reducing the management of parts and the number of assembly operations.

The present invention is a mechanism for attaching and detaching a photosensitive drum to a cartridge fixing hole of an image forming apparatus, in order to achieve the object described above, a protrusion is formed protruding in the outer peripheral direction of one end so that the projection is caught on the tip of the photosensitive drum A cylinder having a receiving space, the other end of which is inserted into the photosensitive drum and having an opening formed toward the tip; A shaft configured to be movable in the longitudinal direction of the photosensitive drum in the accommodation space such that one end protrudes out of the opening or is concealed into the opening; And an elastic body for which an elastic restoring force is applied to protrude the shaft into the opening, wherein the shaft protrudes through the opening and is inserted into the cartridge fixing hole to rotatably support the photosensitive drum. Provided is a photosensitive drum detachment mechanism for a cartridge.

This prevents an excessive force from being applied to the process of installing the photosensitive drum by using mutual interference or elastic restoring force without using a permanent coupling form in the process of installing the photosensitive drum to align the cartridge fixing hole. At the same time, the photosensitive drum can be easily and conveniently separated.

An interfering portion is formed which mutually interferes with the shaft and / or the cylinder in such a state that one end of the shaft protrudes by the protruding length so that one end of the shaft does not protrude longer than a predetermined protruding length through the opening. At this time, the interference portion may be formed of a jaw formed to interfere with each other as the shaft moves. Through this, even if the operator does not manipulate the protruding length of the shaft, it is possible to maintain a constant length of the shaft protruding through the opening.

Further, fixing the position where the one end of the shaft is engaged with the shaft and the cylinder while the one end of the shaft is protruded by the protruding length so that one end of the shaft does not protrude longer than the predetermined length to protrude through the opening. Threaded parts are formed. Therefore, although the shaft protrudes from the cylinder by the elastic restoring force of the elastic body, in the state in which the photosensitive drum is aligned with the cartridge fixing hole, the shaft is fixed by the positioning screw to insert the shaft protruding into the cartridge fixing hole. The shaft is concealed into the opening by a force greater than the restoring force, thereby preventing the shaft insertion process from being delayed or inconvenient.

Similarly, a position fixing screw portion formed to be engaged with the shaft and the cylinder such that the shaft is fastened to each other in a state concealed in the accommodating space is secured in the state concealed in the accommodating space despite the elastic body. do. This prevents the tendency of the shaft to continuously penetrate through the opening by the elastic restoring force of the elastic body by fixing the shaft so that the shaft is completely concealed by the positioning screw when the photosensitive drum is to be removed from the cartridge. In order to facilitate the separation of the photosensitive drum.

At this time, the end surface of the shaft is formed with a (-) or (+) shaped groove to be engaged by a driver, and simply rotates the shaft while penetrating the cartridge fixing hole with a (-) or (+) shaped screwdriver. The positioning screw of the shaft and the cylinder makes it easier to interlock or to release the fastening state.

Meanwhile, the present invention provides a mechanism for attaching and detaching a photosensitive drum to a cartridge fixing hole of an image forming apparatus, wherein a flange protrudes in an outer circumferential direction of one end thereof, and the other end is connected to the photosensitive drum while the flange is caught by a tip of the photosensitive drum. And a receiving space inserted into and penetrated along the longitudinal direction of the photosensitive drum, wherein one end of the opening in the receiving space is formed at a lower end of the inner circumferential surface so as to be smaller than the opening of the other end, and the opening of the other end A cylinder having a female threaded portion; A groove engaging with the driver is formed in the tip surface, and a protrusion is formed on the outer circumferential surface so as to interfere with the jaw, a male thread portion is formed on the outer circumferential surface of the protrusion, and one end protrudes out of the opening or the A shaft movably formed in the longitudinal direction of the photosensitive drum in the accommodation space to conceal the opening; A blocking member fixed to the cylinder with the shaft interposed therebetween; A spring compressed between the blocking member and the shaft; And the shaft protrudes into the opening by the spring and is inserted into the cartridge fixing hole so that the shaft is rotatably supporting the photosensitive drum.

Through this, the cylinder, the shaft, the blocking member, and the spring are combined to form a module, thereby additionally securing the advantages of more smoothly managing and assembling these parts during the process of arranging the photosensitive drum in the cartridge. can do.

On the other hand, the present invention provides a mechanism for attaching and detaching a photosensitive drum to a cartridge fixing hole of an image forming apparatus, comprising: a shaft having a guide protrusion protrudingly formed on an outer circumferential surface thereof and a grip portion formed on an inner circumferential surface thereof; A hooking portion protrudes in an outer circumferential direction of one end so as to be caught by the front end of the photosensitive drum, and a hollow portion is formed in communication with the cartridge fixing hole in a size through which one end of the shaft penetrates and penetrates along a longitudinal direction, and a circumference on the inner circumferential surface of the other end A first cylinder having a locking groove formed from a front end surface in a direction; An accommodation space for receiving the shaft is formed, and engaged with the guide protrusion of the shaft to guide the shaft in the longitudinal direction so that one end of the shaft protrudes through the first cylinder or is hidden without penetrating the first cylinder. A guide cylinder having a guide groove formed on an inner circumferential surface thereof, the second cylinder integrally coupled to the other end of the first cylinder; Including, the locking groove and the guide groove is in communication with each other in the state in which the first cylinder and the second cylinder is coupled to the locking groove can accommodate the guide projection, the shaft protrudes through the first cylinder The photosensitive drum detaching mechanism of the cartridge for an image forming apparatus, characterized in that configured to rotatably support the photosensitive drum by being inserted into a fixing hole of the cartridge.

This is because the shaft moves along the longitudinal direction of the first cylinder as the guide protrusion of the shaft is inserted into the guide groove of the first cylinder, so that the shaft is guided with a predetermined protruding length from the second cylinder. By turning the projection in the circumferential direction along the locking groove of the second cylinder (in other words, rotating the shaft), the shaft maintains its protruding state even when subjected to the longitudinal force of the photosensitive drum. In order to be able to be stably inserted into the cartridge fixing hole. In addition, by separately manufacturing the first cylinder and the second cylinder, it is possible to manufacture them in an injection molding process it is possible to implement a faster and cheaper production.

Here, the grip portion is formed in the shape of a rod interconnecting the inner circumferential surface of the shaft. Therefore, when the user intends to protrude the shaft from the second cylinder or conceal the inside of the second cylinder, it is easy for the user or the installer to walk, pull, or push the rod-shaped grip through the cartridge fixing hole.

In order to more firmly maintain the protruding state of the shaft, an extension groove bent and extended from the locking groove is formed on the inner circumferential surface of the first cylinder. In this case, one or more bent points are sufficient, but when two or more are formed, any one or more of them is effectively bent at an angle of 90 degrees or less so that friction between the guide protrusion and the guide groove is sufficiently generated. .

Therefore, the extension groove is bent one or more times, it is preferable to include that formed in parallel with the circumferential direction of the shaft. This is because, when formed parallel to the circumferential direction of the shaft, the state can be firmly maintained and supported against the force in the longitudinal direction of the photosensitive drum.

In addition, since the guide protrusion is connected to the locking groove via the guide groove so that the shaft can be firmly fixed, the guide groove and the locking groove can be moved so that the guide protrusion can be moved in a state where the first cylinder and the second cylinder are coupled. These must communicate with each other. The first cylinder and the second cylinder in such a state, the coupling portion for guiding the first cylinder and the second cylinder is fixed to the position where the guide groove and the locking groove is connected to each other further. Here, the engagement portion may be in the form of a protrusion and a groove formed to be engaged with each other on the surface where the first cylinder and the second cylinder abut each other, the position where the guide groove and the locking groove is in communication with the first cylinder and the second cylinder is coupled. It can be formed with a set interlocking thread.

On the other hand, according to the present invention, the first cylinder and the second cylinder may be formed in one body. That is, the present invention is a mechanism for attaching and detaching a photosensitive drum to a cartridge fixing hole of an image forming apparatus, comprising: a shaft having a guide protrusion protrudingly formed on an outer circumferential surface thereof and a grip portion formed on an inner circumferential surface thereof; A locking portion protrudes in an outer circumferential direction of one end so as to be caught by the front end of the photosensitive drum, and an accommodation space for accommodating the shaft is formed in the hollow portion, and engaged with the guide protrusion of the shaft to guide the shaft in the longitudinal direction to the shaft. A cylinder having a guide groove formed on an inner circumferential surface thereof to guide one end of the protrusion to protrude outwardly or to conceal the inside of the locking portion; And a photosensitive drum detachment mechanism of a cartridge for an image forming apparatus, wherein the shaft is inserted into the cartridge fixing hole while the shaft protrudes from the cylinder to support the photosensitive drum in a rotatable manner.

Here, the grip portion may be formed in the shape of a rod interconnecting the inner peripheral surface of the shaft.

In addition, in the state where the shaft is protruded to be inserted into the cartridge fixing hole, the guide groove is connected to the extension groove bent one or more times, so that the shaft can be more firmly fixed.

On the other hand, the present invention is a mechanism for attaching and detaching a photosensitive drum to a cartridge fixing hole of an image forming apparatus, wherein a projection protrudes in an outer circumferential direction of one end so that the other end is attached to the photosensitive drum while the projection is caught on the tip of the photosensitive drum. A cylinder having a receiving space inserted therein and having an opening toward the tip; A shaft configured to be movable in the longitudinal direction of the photosensitive drum in the accommodation space such that one end protrudes out of the opening or is concealed into the opening; An elastic body to which elastic restoring force is applied to protrude the shaft into the opening; And the shaft protrudes through the opening and is inserted into the cartridge fixing hole so as to rotatably support the photosensitive drum, wherein the guide guides movement of the shaft in the longitudinal direction of the cylinder in the accommodation space. A rail protrudes from an inner circumferential surface, and a protrusion formed to interfere with the guide rail is formed on an outer circumferential surface of the shaft, and a rail groove accommodating the guide rail is formed in the protruding portion so that the shaft is engaged with the guide rail and the rail groove. Is movable in the longitudinal direction of the cylinder, and when the shaft is concealed inside the cylinder, the engagement between the guide rail and the rail groove is released, and the guide rail is formed to enable the shaft to be rotated. Cartridge for image forming apparatus, characterized in that It provides a drum detachable mechanism.

This is advantageous in that it is possible to implement a function capable of stably fixing the concealed state of the shaft while forming a guide rail that is easy to process while improving productivity by excluding a screw part that takes a relatively long time for processing. Has an effect.

On the other hand, the present invention provides a mechanism for attaching and detaching a photosensitive drum to a cartridge fixing hole of an image forming apparatus, wherein a flange protrudes in an outer circumferential direction of one end thereof, and the other end is connected to the photosensitive drum in a state where the flange is caught by the tip of the photosensitive drum. A cylinder having a receiving space inserted into and formed in the penetrating direction along the lengthwise direction of the photosensitive drum, wherein the opening at one end of the housing space is smaller than the opening at the other end; A groove engaging with the driver is formed in the tip surface, and a protrusion is formed on the outer circumferential surface so as to interfere with the jaw, and the longitudinal direction of the photosensitive drum in the receiving space so that one end protrudes out of the opening or is concealed into the opening. A shaft movably formed thereon; A blocking member fixed to the cylinder with the shaft interposed therebetween; A spring compressed between the blocking member and the shaft; And the shaft protrudes into the opening by the spring and is inserted into the cartridge fixing hole to pivotally support the photosensitive drum, wherein the shaft is moved in the longitudinal direction of the cylinder within the receiving space. Guide rails extending from the jaw to protrude on the inner circumferential surface, and a rail groove for receiving the guide rail is formed in the protrusion, the shaft is the length of the cylinder when the guide rail and the rail groove is engaged Which is movable in the direction, and in which the shaft is concealed inside the cylinder, the engagement between the guide rail and the rail groove is released, and the guide rail is formed to enable the shaft to rotate. Remove the photosensitive drum detachment mechanism of the cartridge for forming apparatus Ball.

Hereinafter, a photosensitive drum detaching mechanism of a cartridge for an image forming apparatus according to a first embodiment of the present invention will be described in detail with reference to the accompanying drawings.

2 to 5, in the photosensitive drum detachment mechanism 100 of the cartridge for an image forming apparatus according to the first embodiment of the present invention, the flange 112 protrudes in the circumferential direction of one end 110a. Cylinder 110 inserted into the hollow portion 10a of the photosensitive drum 10 in a state where the flange 112 is caught by the front end 10b of the photosensitive drum 10, and the receiving space 111 of the cylinder 110. Shaft 120 and a shaft 120 accommodated in the shaft 110 and movable in the longitudinal direction of the photosensitive drum 10 so as to protrude out of the opening formed in one end 110a of the cylinder 110 or conceal the inside of the opening. The coil spring 130 is installed to compress the elastic restoring force in the direction protruding to the opening, and the blocking member 140 is coupled to the other end 110b of the cylinder 110 to surround the shaft 120 therein. do.

As shown in FIG. 3, the cylinder 110 has an opening formed with a diameter d1 that is slightly larger than the diameter d2 of one end of the shaft 120 so that one end 120a of the shaft 120 can pass therethrough. An accommodating space 111 is formed to accommodate the shaft 120, and the flange 112 is formed in the outer circumferential direction of the one end 110a so that the one end 110a is caught by the front end 10b of the photosensitive drum 10. do. In addition, a jaw 113 that interferes with the shaft 120 in a state in which the one end 120a of the shaft 120 protrudes by the predetermined protruding length so that the shaft 120 does not protrude longer than the predetermined protruding length includes a cylinder ( It is formed on the inner circumferential surface of the 110, the outer peripheral surface of the other end (110b) of the cylinder 110 to be fastened and fixed to the blocking member 140, the coupling male thread portion 114 that engages with the coupling female screw portion 141 of the blocking member 140. Is formed. In addition, the position fixing female threaded portion 115 that is engaged with the male threaded portion 123 of the shaft 120 is formed so that the shaft 120 may be fixed in a hidden state in the accommodation space 111.

The shaft 120 is accommodated in the accommodation space 111 of the cylinder 110, as shown in FIG. In the shaft 120, a spring accommodating portion 121 for accommodating the coil spring 130 is recessed to reduce the overall assembly length of the detachable mechanism 100. Then, the protrusion 122 is protruded from the outer circumferential surface so that the shaft 120 interferes with the jaw 113 of the cylinder 110 in a state where the shaft 120 protrudes by a predetermined protruding length from the cylinder 110. In addition, the outer circumferential surface of the protrusion 122 is formed with a position fixing male threaded portion 123 engaged with the position fixing female threaded portion 115 of the cylinder 110, and the shaft in a state accommodated in the accommodation space 111 of the cylinder 110. A positive driver groove 124 is formed in the front end surface to facilitate rotation of the 120.

One end of the coil spring 130 contacts the inner wall of the blocking member 140, and the other end contacts the spring receiving portion 121 of the shaft 120. Through this, a force in a direction projecting toward the opening is always applied to the shaft 120.

In the detachable mechanism 100 of the photosensitive drum 100 according to the first embodiment of the present invention configured as described above, one end of the shaft 120 protrudes from the opening of the accommodation space 111 to fix the cartridge 2 ′ for the image forming apparatus. By being inserted into the ball 2, one side of the photosensitive drum 10 is rotatably supported.

Hereinafter, a method of rotatably installing the photosensitive drum 10 on the cartridge by using the attachment / detachment mechanism 100 of the photosensitive drum according to the first embodiment of the present invention configured as described above will be described in detail.

First, the shaft 120 is inserted into the receiving space 111 of the cylinder 110. At this time, since the position fixing male threaded portion 123 of the shaft 120 is engaged with the position fixing female threaded portion 114 of the cylinder 110, the shaft 120 is inserted into the accommodation space 111 of the cylinder 110. The shaft 120 is rotated in the process.

Then, when the shaft 120 is inserted into the receiving space 111 of the cylinder 110, in the state in which the coil spring 130 is positioned in the spring receiving portion 121 of the shaft 120, The coupling male screw 114 and the female screw 141 of the blocking member 140 is fastened and fixed. Therefore, the coil spring 130 is automatically compressed by a predetermined value, so that the elastic restoring force of one end of the shaft 120 protrudes out of the cylinder 110.

Then, the shaft 120 is pressed in such a way that the shaft 120 is concealed into the cylinder 110, and the shaft 120 is inserted into a (+)-shaped groove formed in the front end surface of the shaft 120. ) To engage the position fixing male threaded portion 123 of the shaft 120 with the position fixing female threaded portion 114 of the cylinder 110. Therefore, despite the compressed state of the coil spring 130, due to the fastening state of the position fixing screw (114,123), the shaft 120 maintains the state hidden in the cylinder (110).

Then, the removable module including the cylinder 110, the shaft 120, the coil spring 130, and the blocking member 140 is inserted into the hollow portion 10a of the photosensitive drum 10. At this time, since the flange 112 is formed in one outer peripheral surface of the cylinder 110, the flange 112 is inserted in the state caught by the front-end | tip 10b of the photosensitive drum 10. As shown in FIG.

Then, after fixing the drive gear side located on the other side of the photosensitive drum 10 to which the detachable module is inserted is connected to the drive unit on the cartridge 2 'side, the photosensitive drum 10 is fixed to the fixing hole 2 of the cartridge 2'. Align and insert the positive screwdriver through the fixing hole 2 and insert it into the positive magnetic groove 124 of the end surface of the shaft 120 to rotate it. Release of the fastening state with the position fixing female threaded portion 114 of the cylinder (110). Through this, one end 120a of the shaft 120 reaches the position where the jaw 113 of the cylinder 110 and the protrusion 122 of the shaft 120 interfere with each other by the elastic restoring force of the coil spring 130. One end 120a of the protruding shaft 120, which protrudes from the cylinder 110, is inserted into the fixing hole 2 of the cartridge 2 'so that the photosensitive drum 10 is fixed to the fixing hole of the cartridge 2'. 2) can be rotatably supported.

Hereinafter, a method of separating the photosensitive drum 10 from the cartridge by using the detachable mechanism 100 of the photosensitive drum according to the first embodiment of the present invention configured as described above will be described in detail.

First, a positive screwdriver is inserted into the positive slot groove 124 of the end surface of the shaft 120 so that one end 120a of the shaft 120 is separated from the fixing hole 2 of the cartridge 2 '. Pressurized while fitted. When one end 120a of the shaft 120 is concealed into the cylinder 110, the positive screwdriver is rotated so that the position fixing screw portion 123 of the shaft 120 fixes the position of the cylinder 110. Engage with the female threaded portion 114.

Thus, no interference occurs between the photosensitive drum 10 and the fixing hole 2 of the cartridge 2 ', so that the photosensitive drum 10 is cartridged even if there is no process such as cutting the photosensitive drum 10. It can be separated from the 2 '.

That is, in this separated state, the detachable module consisting of the cylinder 110, the shaft 120, the coil spring 130, and the blocking member 140 is maintained in the initial installation state, and at the same time, the interference fit in terms of reuse Since it excludes a permanent form of bonding, such as bonding or the like, even if the photosensitive drum 10 is replaced, these components can be reused as it is. Further, even when one of these parts is to be replaced, the photosensitive drum 10 is separated from the cartridge 2 'by the above method, so that the photosensitive drum 10 can be reused again.

As described above, since the attachment / detachment mechanism of the photosensitive drum according to the first embodiment of the present invention uses the elastic restoring force of the fitting or the spring, the process of installing or removing the photosensitive drum 10 on the cartridge for the image forming apparatus becomes very simple. Has an advantage. Furthermore, by providing the position fixing screws 115 and 123 to maintain the hidden state of the shaft 120, the operator or user can more easily install and detach the photosensitive drum 10.

Hereinafter, a second embodiment 200 of the present invention will be described in detail.

6 to 12, the photosensitive drum detaching mechanism 200 of the cartridge for an image forming apparatus according to the second embodiment of the present invention, the flange (10) to be caught by the front end (10b) of the photosensitive drum 10; 224 is protruded and has a through-hole in the center of the first cylinder 220, the second cylinder 210 coupled to the first cylinder 220, and accommodated in the accommodation space 211 of the second cylinder 210 It is configured to include a shaft 230 which is installed to be movable in the longitudinal direction.

6 and 7, the first cylinder 220 has a through hole 221 having a diameter through which the shaft 230 can penetrate, and a photosensitive drum 10 is formed at an outer circumferential surface of the first cylinder 220. The flange 224 is formed to protrude so as to be caught by the front end (10b) of), and the locking groove 222 is formed in the circumferential direction from the bottom of the other end is formed. Then, the coupling protrusion 223 for guiding the first cylinder 220 and the second cylinder 210 to be coupled to each other so that the guide groove 212 and the locking groove 222 which will be described later is formed to protrude from the bottom of the other end do.

As shown in FIG. 8, the second cylinder 210 is formed with a recessed guide groove 212 having a slot shape for guiding the shaft 230 to be movable in the longitudinal direction 230d. At this time, the sealed departure prevention portion 212a is formed at the end of the guide groove 212 to prevent the shaft 230 is separated in the right direction of FIG. In addition, a coupling groove 213 engaged with the coupling protrusion 223 of the first cylinder 220 is recessed in a front end surface of the first cylinder 220.

As shown in FIG. 9, the shaft 230 has a guide groove 212 with a guide protrusion 231 protruding at an interval of 90 degrees on its outer circumferential surface inserted into the guide groove 212 of the second cylinder 210. As it moves along, one end moves in the longitudinal direction within the receiving space 211 of the second cylinder 210 so as to protrude or conceal from the first cylinder 220. At this time, the movement of the shaft 230 is made by pulling or pushing the grip rod 232 formed by connecting the inner circumferential surface of the shaft 230 with a long nose or a dedicated grip mechanism.

Similarly, in the detachable mechanism 200 of the photosensitive drum 200 according to the second embodiment of the present invention configured as described above, one end of the shaft 230 protrudes to the outside through the first cylinder 220 so that the image forming apparatus cartridge ( By inserting into the fixing hole 2 of 2 '), one side of the photosensitive drum 10 is rotatably supported.

As such, the guide protrusion 231 of the shaft 230 passes through the locking groove 222 of the first cylinder 220 bent with respect to the guide groove 212 of the second cylinder 210. By separating and manufacturing the first cylinder 220 and the second cylinder 210, the first and second cylinders 220 and 210 can be manufactured at low cost and quickly by injection molding.

Hereinafter, a method of rotatably installing the photosensitive drum 10 to the cartridge 2 'by using the detachable mechanism 200 of the photosensitive drum according to the second embodiment of the present invention configured as described above will be described in detail.

As shown in FIG. 10, the shaft 230 accommodates the second cylinder 210 while the guide protrusion 231 of the shaft 230 is inserted into the guide groove 212 of the second cylinder 210. Inserted into (211).

Then, as shown in Figure 11, the engaging projection 223 of the first cylinder 220 is inserted into the engaging groove 212 of the second cylinder 210, if necessary, bonding the interface therebetween. do. For reference, even though the bonding surfaces of the first cylinder 220 and the second cylinder 210 are bonded, they are not bonded to the photosensitive drum 10, and thus the photosensitive drum 10 is separated as described below. When the photosensitive drum 10 is cut or a large force is applied to dismantle the assembled parts, it does not occur. Through this, the shaft 230 is installed to be movable in the longitudinal direction without being separated from the accommodation space 211 of the first cylinder 220 and the second cylinder 210.

Then, the detachable module of the first cylinder 220, the second cylinder 210 and the shaft 230 is inserted into the hollow portion 10a of the photosensitive drum 10. At this time, since the flange 224 protrudes from the outer peripheral surface of one end of the first cylinder 220, the flange 224 is inserted into the front end 10b of the photosensitive drum 10.

Then, after fixing the drive gear side located on the other side of the photosensitive drum 10 to which the detachable module is inserted is connected to the drive unit on the cartridge 2 'side, the photosensitive drum 10 is fixed to the fixing hole 2 of the cartridge 2'. Align and pull the grip rod 232 through the fixing hole 2 with the grip mechanism. As a result, as shown in FIG. 12, one end of the shaft 230 has the first cylinder such that the guide protrusion 231 of the shaft 230 reaches the end position of the guide groove 212 of the second cylinder 210. Protruding through the 220, one end of the protruding shaft 230 is inserted into the fixing hole 2 of the cartridge 2 ', so that the photosensitive drum 10 is fixed to the fixing hole 2 of the cartridge 2'. It becomes possible to support rotatably.

Then, in order to prevent the shaft 230 inserted into the fixing hole 2 of the cartridge 2 'from being concealed back into the second cylinder 210 by an external impact or the like, the shaft 230 with the grip mechanism. After pulling), the shaft 230 is rotated to fix the guide protrusion 231 to reach the end of the locking groove 222 through the guide groove 212.

Although not shown in the drawing, an extension groove bent from the locking groove 222 and extending along the longitudinal direction of the first cylinder 220 is formed in the inner circumferential surface thereof, so that the shaft 230 is more firmly protected from external impact. It may be configured to be installed in the fixing hole (2). For this purpose, the extension groove may be formed bent one or more times, it is preferable to include that formed along the circumferential direction of the shaft 220.

Through this, the shaft 230 is not separated from the fixing hole 2 of the cartridge 2 'even in the longitudinal vibration or shock of the photosensitive drum 10, it is possible to firmly rotate one side of the photosensitive drum 10 I can support it.

Hereinafter, a method of separating the photosensitive drum 10 from the cartridge by using the attachment and detachment mechanism 200 of the photosensitive drum according to the second embodiment of the present invention configured as described above will be described in detail.

First, the operator penetrates the grip rod 232 through the fixing hole 2 of the cartridge 2 'with the grip mechanism so that one end of the shaft 230 is disengaged from the fixing hole 2 of the cartridge 2'. After picking up, the shaft 230 rotates so that the guide protrusion 231 of the shaft 230 is separated from the locking groove 222 and transferred to the guide groove 212.

Then, when the shaft 230 is pushed in the state in which the grip rod 232 is picked up by the grip mechanism, one end of the shaft 230 is concealed inside the first cylinder 220. Thus, no interference occurs between the photosensitive drum 10 and the fixing hole 2 of the cartridge 2 ', so that the photosensitive drum 10 is cartridged even if there is no process such as cutting the photosensitive drum 10. It can be separated from the 2 '.

Similarly to the first embodiment, since the detachable module consisting of the first cylinder 220, the second cylinder 210 and the shaft 230 is maintained in the initial installation state even when separated, even if the photosensitive drum 10 is replaced These parts can be reused as they are, and even when one of these parts is to be replaced, the photosensitive drum 10 is separated from the cartridge 2 'by the above method, so that the photosensitive drum 10 is reused again. It becomes possible.

Hereinafter, a third embodiment 300 of the present invention will be described in detail.

13 to 17, the photosensitive drum detaching mechanism 300 of the cartridge for an image forming apparatus according to the third embodiment of the present invention is that the cylinder is formed of one body rather than two bodies. It differs from the second embodiment described above in that respect.

More specifically, in the photosensitive drum detachment mechanism 300 according to the third embodiment, the flange 313 protrudes so as to be caught by the front end 10b of the photosensitive drum 10, and the shaft accommodating portion 311 is formed at the center thereof. It is formed and is guided by the guide groove 312 is accommodated in the cylinder 310, the guide groove 312 is formed to guide the shaft, the receiving space 311 of the cylinder 310 is moved in the longitudinal direction of the cylinder 310 It is configured to include a shaft 320 possibly formed.

As shown in Fig. 14, a flange 313 protrudes from the outer circumferential surface of one end 310a so as to be caught by the tip 10b of the photosensitive drum 10, and guides the shaft 320 to be movable in the longitudinal direction. Guide grooves 312 are formed in the recess mainly in the form of slots along the longitudinal direction.

Here, as shown in Figure 15, the guide groove 312 is formed in the slot shape in the longitudinal direction along the inner circumferential surface of the cylinder 310, but the shaft 320 is subjected to external impact in the state of protruding a predetermined protruding length In order to prevent it from being concealed back into the interior of the cylinder 310, an extension groove 312b is formed at the end of the guide groove 312, which is bent at least once and formed in parallel in the circumferential direction. . In addition, the inlet portion of the guide groove 312 is formed with a locking portion 312c narrowing its width, and when the shaft 320 is inserted into the cylinder 310, the guide protrusion 321 is locked by giving a slight impact. When passing through the portion 312c, the guide protrusion 321 passes again through the locking portion 312c by the load of the degree of self-weight to prevent the shaft 320 from being separated from the cylinder 310.

As shown in FIG. 16, the shaft 320 has a guide groove 312 and an extension in a state in which a guide protrusion 321 protruding at an interval of 90 degrees on its outer circumferential surface is inserted into the guide groove 312 of the cylinder 310. As it moves along the groove 312b, it moves in the longitudinal direction in the receiving space 311 of the cylinder 310 so that one end protrudes or is hidden from the cylinder 310. At this time, the movement of the shaft 320 in the longitudinal direction is performed by pulling or pushing the grip rod 322 formed to connect the inner circumferential surface of the shaft 320 with the long nose or the dedicated grip mechanism.

Similarly, in the detachable mechanism 300 of the photosensitive drum according to the third embodiment of the present invention configured as described above, one end of the shaft 320 protrudes out of the cylinder 310 so that the image forming apparatus cartridge 2 ' By being inserted into the fixing hole 2, one side of the photosensitive drum 10 is rotatably supported.

Hereinafter, a method of rotatably installing the photosensitive drum 10 on the cartridge 2 'by using the attachment / detachment mechanism 300 of the photosensitive drum according to the third embodiment of the present invention configured as described above will be described in detail.

The shaft 320 is inserted into the receiving space 311 of the cylinder 310 with the guide protrusion 321 of the shaft 320 inserted into the guide groove 312 of the cylinder 310.

Then, the cylinder 310 and the shaft 320 are inserted into the hollow portion 10a of the photosensitive drum 10. At this time, since the flange 313 protrudes from the outer peripheral surface of the cylinder 310 at one end, the flange 313 is inserted in the state caught by the tip 10b of the photosensitive drum 10.

Then, after fixing the driving gear side located on the other side of the photosensitive drum 10 with the driving portion of the cartridge 2 'side, the photosensitive drum 10 is aligned with the fixing hole 2 of the cartridge 2' and fixed. The grip rod 322 of the shaft 320 is pulled by the grip mechanism through the ball 2. Through this, as shown in FIG. 17, one end of the shaft 320 moves the cylinder 310 such that the guide protrusion 321 of the shaft 320 reaches the end position of the guide groove 312 of the cylinder 210. One end of the protruding shaft 320 is inserted into the fixing hole 2 of the cartridge 2 'so that the photosensitive drum 10 can be rotated to the fixing hole 2 of the cartridge 2'. I can support it.

Then, in order to prevent the shaft 230 inserted into the fixing hole 2 of the cartridge 2 'from being concealed back into the cylinder 310 by an external impact or the like, the shaft 230 is gripped with a grip mechanism. By rotating, the guide protrusion 321 is fixed to reach the end of the extension groove 312b via the guide groove 312.

As a result, the shaft 320 is not detached from the fixing hole 2 of the cartridge 2 'even in the longitudinal vibration or shock of the photosensitive drum 10, so that one side of the photosensitive drum 10 can be firmly rotated. I can support it.

Hereinafter, a method of separating the photosensitive drum 10 from the cartridge by using the attachment / detachment mechanism 300 of the photosensitive drum according to the third embodiment of the present invention configured as described above will be described in detail.

After the grip rod 322 is picked up through the fixing hole 2 of the cartridge 2 'by the grip mechanism so that one end of the shaft 320 is separated from the fixing hole 2 of the cartridge 2', the shaft The shaft 230 is rotated and pushed as necessary so that the guide protrusion 321 of the 320 is moved from the extension groove 312b to the guide groove 312.

Then, when the guide protrusion 321 reaches the guide groove 312, the shaft 320 is pushed in the state in which the grip rod 322 is picked up by the grip mechanism, so that one end of the shaft 230 is inside the cylinder 310. Is hidden. Thus, no interference occurs between the photosensitive drum 10 and the fixing hole 2 of the cartridge 2 ', so that the photosensitive drum 10 is cartridged even if there is no process such as cutting the photosensitive drum 10. It can be separated from the 2 '.

As in the above-described embodiments, since the detachable module consisting of the cylinder 310 and the shaft 320 is maintained in the initial installation state even when separated, these parts can be reused as they are even when the photosensitive drum 10 is replaced. Even when one of these parts is to be replaced, the photosensitive drum 10 is separated from the cartridge 2 'by the above method, so that the photosensitive drum 10 can be reused again.

18 to 20, the photosensitive drum detachment mechanism 400 of the cartridge for an image forming apparatus according to the fourth embodiment of the present invention has a flange (412) protruded in the outer peripheral direction of one end of the flange ( 412 is accommodated in the cylinder 410 inserted into the hollow portion 10a of the photosensitive drum 10 and the receiving space 411 of the cylinder 410 while being caught by the front end 10b of the photosensitive drum 10. A shaft 420 movably disposed in the longitudinal direction of the photosensitive drum 10 to protrude out of the opening formed at one end of the cylinder 410 along the rail 415 in the accommodation space 411 or to conceal the inside of the opening; The coil spring 430 is compressed so that the elastic restoring force acts in the direction in which the shaft 420 is protruded into the opening, and the blocking member 440 is coupled to the other end of the cylinder 410 so as to surround the shaft 420 therein. It consists of.

As shown in Fig. 18, the cylinder 410 is formed with a receiving space 411 having an opening formed with a diameter slightly larger than the diameter of one end of the shaft 420 so that one end of the shaft 420 can pass therethrough. The shaft 420 is accommodated, and the flange 412 is formed in the outer circumferential direction of one end so that one end 110a is caught by the front end 10b of the photosensitive drum 10. In addition, the cylinder 410 includes a jaw 413 that interferes with the shaft 420 while one end of the shaft 420 protrudes by the predetermined protruding length so that the shaft 420 does not protrude longer than the predetermined protruding length. The outer peripheral surface of the other end of the cylinder 410 is formed on the inner circumferential surface of the blocking member 440, the coupling male screw portion 414 is engaged with the coupling female screw portion 441 of the blocking member 440. The shaft 420 extends short of the other end of the cylinder 410 from the jaw 413 of the accommodation space 411 of the cylinder 410 so that the shaft 420 can be fixed in a hidden state within the accommodation space 411. Guide rails 415 are formed along the longitudinal direction on the inner circumferential surface of the cylinder 410.

The shaft 420 is accommodated in the receiving space 411 of the cylinder 410 as shown in FIG. In the shaft 420, a spring receiving portion 421 for accommodating the coil spring 430 is recessed to reduce the overall assembly length of the detachable mechanism 400. In addition, the protrusion 422 is protruded from the outer circumferential surface so that the shaft 420 interferes with the jaw 413 of the cylinder 410 in a state where the shaft 420 protrudes from the cylinder 410 by a predetermined protruding length. In addition, a rail groove 423 is formed on the outer circumferential surface of the protrusion 422 to guide the shaft 420 in the longitudinal direction in engagement with the guide rail 415 of the cylinder 110, and the accommodation space 411 of the cylinder 410 is formed. A positive driver groove 424 is formed in the front end surface to facilitate the rotation of the shaft 420 in the state accommodated in it.

One end of the coil spring 430 is in contact with the inner wall of the blocking member 440 and the other end is in contact with the spring receiving portion 421 of the shaft 420. Through this, a force in the direction projecting toward the opening always acts on the shaft 420.

That is, the photosensitive drum detachment mechanism 400 according to the fourth embodiment of the present invention is similar to the first embodiment, but the guide rail 415 is formed in the cylinder 410 along the longitudinal direction, and the shaft ( 420 is different in that the shaft 420 moves in the cylinder 410 by the rail groove 423 formed in the protrusion 422 of the outer circumferential surface moves along the guide rail 415.

More specifically, the guide rail 415 inside the cylinder 410 is formed to extend so that the shaft 420 reaches the jaw 413 protruding from the cylinder 410, as shown in FIG. 18. However, when the shaft 420 is hidden inside the cylinder 410, the engagement between the guide rail 415 and the rail groove 423 is configured to be released. As a result, the shaft 420 has a propensity to protrude by the elastic restoring force of the coil spring 430 while the shaft 420 protrudes from the cylinder 410, but the shaft 420 when the shaft 420 conceals the inside of the cylinder 410. 19) and 20, the shaft 420 is caused by the interference between the protrusion 422 protruding on the outer circumferential surface of the shaft 420 and the starting end surface of the guide rail 415. As shown in FIGS. Is stably concealed inside the cylinder 410 despite the elastic restoring force of the coil spring 430.

In the detachable mechanism 400 of the photosensitive drum according to the fourth embodiment of the present invention configured as described above, one end of the shaft 420 also protrudes from the opening of the accommodation space 411 so that the image forming apparatus cartridge 2 ' By being inserted into the fixing hole 2, one side of the photosensitive drum 10 is rotatably supported. In addition, the attachment / detachment mechanism 400 of the photosensitive drum according to the fourth embodiment preferably eliminates the screw portion, which takes a relatively long time to process, and forms the guide rail 415 that is easy to process. Since it is possible to implement a similar function, there is an advantage over the first embodiment in terms of improved productivity.

At this time, the height of the locking portion 411a formed at the rear of the guide rail 415 is determined so that the shaft 420 can be rotated in a state hidden inside the cylinder 410.

Hereinafter, a method of rotatably installing the photosensitive drum 10 on the cartridge by using the attachment / removal mechanism 400 of the photosensitive drum according to the fourth embodiment of the present invention configured as described above will be described in detail.

First, the shaft 420 is inserted into the receiving space 411 inside the cylinder 410 so that the rail groove 423 of the shaft 420 engages with the guide rail 415 in the receiving space 411 of the cylinder 410. Insert it.

Then, when the shaft 420 is inserted into the receiving space 411 of the cylinder 410, the coil spring 430 is positioned in the spring receiving portion 421 of the shaft 420, the cylinder 410 of the The male screw portion 441 of the coupling male screw portion 414 and the blocking member 440 is fastened and fixed. Therefore, the coil spring 430 is automatically compressed by a predetermined value, so that the elastic restoring force of one end of the shaft 420 protrudes out of the cylinder 410 is applied.

Then, in a state in which the shaft 420 is pressed in such a way that the shaft 420 is concealed into the cylinder 410, the rail groove 423 of the shaft 420 is separated from the guide rail 415 to lock the portion 411a. At this time, the shaft 420 is rotated while the driver is inserted into the (+)-shaped groove formed in the front end surface of the shaft 420, the protrusion 422 and the guide rail of the shaft 420 Since the front end faces of 415 interfere with each other, despite the compressed state of the coil spring 430, the shaft 420 is caused by the interference between the protrusion 422 of the shaft 420 and the guide rail 415. 410 remains hidden inside.

Then, the detachable module including the cylinder 410, the shaft 420, the coil spring 430, and the blocking member 440 is inserted into the hollow portion 10a of the photosensitive drum 10. At this time, since the flange 412 is formed in one outer peripheral surface of the cylinder 410, the flange 412 is inserted in the state caught by the front-end | tip 10b of the photosensitive drum 10. As shown in FIG.

Then, after fixing the drive gear side located on the other side of the photosensitive drum 10 to which the detachable module is inserted is connected to the drive unit on the cartridge 2 'side, the photosensitive drum 10 is fixed to the fixing hole 2 of the cartridge 2'. Aligning and inserting the (+) screwdriver through the fixing hole (2) into the (+) slot 424 of the end surface of the shaft 420 to rotate, the rail groove 423 of the shaft 420 is guide rail Mesh with (415). Through this, one end of the shaft 420 by the elastic restoring force of the coil spring 430 cylinder 410 to reach a position where the jaw 413 of the cylinder 410 and the protrusion 422 of the shaft 420 interfere Protrude from the end, and one end of the protruding shaft 420 is inserted into the fixing hole 2 of the cartridge 2 ', so that the photosensitive drum 10 is rotatably supported by the fixing hole 2 of the cartridge 2'. You can do it.

Hereinafter, a method of separating the photosensitive drum 10 from the cartridge by using the detachable mechanism 400 of the photosensitive drum according to the fourth embodiment of the present invention configured as described above will be described in detail.

First, with a (+) screwdriver inserted into the (+) screw groove 424 of the end surface of the shaft 420 so that one end of the shaft 420 is separated from the fixing hole 2 of the cartridge 2 '. Pressurize. When one end of the shaft 420 is concealed into the cylinder 410, the (+) screwdriver is rotated so that the protrusion 422 of the shaft 420 and the front end surface of the guide rail 415 interfere with each other. do. Thus, despite the compressed state of the coil spring 430, the shaft 420 remains hidden inside the cylinder 410 by the interference between the protrusion 422 of the shaft 420 and the guide rail 415. Done.

In this state, since no interference occurs between the photosensitive drum 10 and the fixing hole 2 of the cartridge 2 ', the photosensitive drum 10 may be removed even if there is no process such as cutting the photosensitive drum 10. Can be separated from the cartridge 2 '.

That is, in this separated state, the detachable module consisting of the cylinder 410, the shaft 420, the coil spring 430, and the blocking member 440 is maintained in the initial installation state, and at the same time, the interference fit in terms of reuse Since it excludes a permanent form of bonding, such as bonding or the like, even if the photosensitive drum 10 is replaced, these components can be reused as it is. Further, even when one of these parts is to be replaced, the photosensitive drum 10 is separated from the cartridge 2 'by the above method, so that the photosensitive drum 10 can be reused again.

In the above described a preferred embodiment of the present invention by way of example, the scope of the present invention is not limited only to this specific embodiment, it can be changed appropriately within the scope described in the utility model registration claims.

As described above, the present invention is a mechanism for attaching and detaching a photosensitive drum to a cartridge fixing hole of an image forming apparatus, wherein a protrusion is formed to protrude in the outer circumferential direction of one end so that the other end is in a state where the protrusion is caught at the tip of the photosensitive drum. A cylinder having a receiving space inserted into the photosensitive drum and having an opening formed toward the tip; A shaft configured to be movable in the longitudinal direction of the photosensitive drum in the accommodation space such that one end protrudes out of the opening or is concealed into the opening; An elastic body to which an elastic restoring force is applied to protrude the shaft into the opening; And the shaft protrudes into the opening and is inserted into the cartridge fixing hole so as to pivotally support the photosensitive drum, thereby making it easier to mount the photosensitive drum on the cartridge for the image forming apparatus, and to cut the photosensitive drum. Provided is a photosensitive drum detachment mechanism for a cartridge for an image forming apparatus that can easily detach a photosensitive drum from a cartridge even without a process or a process of forcibly disengaging an engaged portion.

That is, the present invention eliminates permanent forms of bonding such as bonding, welding, interference fitting, etc., which are virtually impossible to separate once combined, and combine the components only by screwing or screwing together. It provides a photosensitive drum detachment mechanism.

In addition, the present invention improves the quality reliability of each product by excluding the permanent form of the coupling method in which the binding quality is different according to the operator's capability.

In addition, the present invention prevents physical damage to the peripheral components in the process of disassembling the photosensitive drum, so that all components around the photosensitive drum can be reused even after disassembling the photosensitive drum, thereby avoiding waste of the working parts. This can greatly reduce the replacement cost.

In addition, the present invention is to manufacture the detachable mechanism of the photosensitive drum in the form of a module to reduce the manufacturing cost by remarkably reducing the number of parts management and assembly labor.

Claims (14)

A mechanism for attaching and detaching a photosensitive drum to a cartridge fixing hole of an image forming apparatus, A cylinder having a receiving space in which a projection protrudes in an outer circumferential direction of one end thereof, the other end of which is inserted into the photosensitive drum with the projection caught on the tip of the photosensitive drum, and the opening having an opening toward the tip; A shaft configured to be movable in the longitudinal direction of the photosensitive drum in the accommodation space such that one end protrudes out of the opening or is concealed into the opening; An elastic body to which an elastic restoring force is applied to protrude the shaft into the opening; And the shaft protrudes through the opening and is inserted into the cartridge fixing hole so as to rotatably support the photosensitive drum. The method of claim 1, The interference portion which mutually interferes with at least one of the shaft and the cylinder with the one end of the shaft protruded by the protruding length so that one end of the shaft does not protrude longer than the predetermined length to protrude through the opening A photosensitive drum detachment mechanism of a cartridge for an image forming apparatus, characterized in that formed. The method of claim 2, Positioning screw portion for interlocking with the shaft and the cylinder such that one end of the shaft is protruded by the protruding length in order to keep the one end of the shaft protrudes by a predetermined protruding length through the opening Photosensitive drum detachment mechanism of the cartridge for the image forming apparatus, characterized in that formed. The method according to any one of claims 1 to 3, And a position fixing screw portion formed to engage with the shaft and the cylinder so that the shaft is fastened to each other in a state concealed in the accommodating space in spite of the elastic body. A photosensitive drum detachment mechanism of a cartridge for an image forming apparatus. The method of claim 4, wherein The photosensitive drum detachment mechanism of the cartridge for the image forming apparatus, characterized in that the front end surface of the shaft is formed with a (-) or (+) shaped groove to be engaged by a driver. A mechanism for attaching and detaching a photosensitive drum to a cartridge fixing hole of an image forming apparatus, A flange protrudes in an outer circumferential direction of one end, and the other end is inserted into the photosensitive drum while the flange is caught by the front end of the photosensitive drum, and has an accommodation space formed through the photosensitive drum. A cylinder having a jaw formed at one end of the inner circumferential surface of the one end of the space so as to be formed smaller than the opening of the other end, and having an internal thread formed at the other end of the opening; A groove engaging with the driver is formed in the tip surface, and a protrusion is formed on the outer circumferential surface so as to interfere with the jaw, a male thread portion is formed on the outer circumferential surface of the protrusion, and one end protrudes out of the opening or the A shaft movably formed in the longitudinal direction of the photosensitive drum in the accommodation space to conceal the opening; A blocking member fixed to the cylinder with the shaft interposed therebetween; A spring compressed between the blocking member and the shaft; And the shaft protrudes into the opening by the spring and is inserted into the cartridge fixing hole so as to rotatably support the photosensitive drum. A mechanism for attaching and detaching a photosensitive drum to a cartridge fixing hole of an image forming apparatus, A shaft having a guide protrusion protruding from the outer circumferential surface and having a grip portion formed on the inner circumferential surface; A hooking portion protrudes in an outer circumferential direction of one end so as to be caught by the front end of the photosensitive drum, and a hollow portion is formed in communication with the cartridge fixing hole in a size through which one end of the shaft penetrates and penetrates along a longitudinal direction, and a circumference on the inner circumferential surface of the other end A first cylinder having a locking groove formed from a front end surface in a direction; An accommodation space is formed to accommodate the shaft, and engages with the guide protrusion of the shaft to guide the shaft in the longitudinal direction so that one end of the shaft protrudes through the first cylinder or is hidden without passing through the first cylinder. A second cylinder formed on an inner circumferential surface of the guide groove to guide the second cylinder and integrally coupled to the other end of the first cylinder; Including, the locking groove and the guide groove is in communication with each other in the state in which the first cylinder and the second cylinder is coupled to the locking groove can accommodate the guide projection, the shaft protrudes through the first cylinder And the photosensitive drum detaching mechanism of the cartridge for the image forming apparatus, wherein the photosensitive drum is rotatably supported by being inserted into the fixing hole of the cartridge in a closed state. The method of claim 7, wherein And the gripping portion is formed in the shape of a rod interconnecting the opposite inner circumferential surfaces of the shaft. The method of claim 7, wherein And an extended groove bent from the locking groove and formed on an inner circumferential surface of the first cylinder. The method of claim 9, The extension groove is formed by bending one or more times, the photosensitive drum detachable mechanism of the cartridge for the image forming apparatus, characterized in that formed in the circumferential direction of the shaft. The method according to any one of claims 7 to 10, And a fitting portion for guiding the first cylinder and the second cylinder to be fixed to a position at which the guide groove and the locking groove are connected to each other. A mechanism for attaching and detaching a photosensitive drum to a cartridge fixing hole of an image forming apparatus, A shaft having a guide protrusion protruding from the outer circumferential surface and having a grip portion formed on the inner circumferential surface; A locking portion protrudes in an outer circumferential direction of one end so as to be caught by the front end of the photosensitive drum, and an accommodation space for accommodating the shaft is formed in the hollow portion, and engaged with the guide protrusion of the shaft to guide the shaft in the longitudinal direction to the shaft. A cylinder having a guide groove formed on an inner circumferential surface thereof to guide one end of the protrusion to protrude outwardly or to conceal the inside of the locking portion; And a photosensitive drum detaching mechanism of the cartridge for an image forming apparatus, wherein the shaft is inserted into the cartridge fixing hole while the shaft protrudes from the cylinder to support the photosensitive drum in a rotatable manner. A mechanism for attaching and detaching a photosensitive drum to a cartridge fixing hole of an image forming apparatus, A cylinder having a receiving space in which a projection protrudes in an outer circumferential direction of one end thereof, the other end of which is inserted into the photosensitive drum with the projection caught on the tip of the photosensitive drum, and the opening having an opening toward the tip; A shaft configured to be movable in the longitudinal direction of the photosensitive drum in the accommodation space such that one end protrudes out of the opening or is concealed into the opening; An elastic body to which an elastic restoring force is applied to protrude the shaft into the opening; And the shaft protrudes through the opening and is inserted into the cartridge fixing hole to pivotally support the photosensitive drum. In the receiving space, a guide rail for guiding movement of the shaft in the longitudinal direction of the cylinder is formed on the inner circumferential surface, and a protrusion is formed on the outer circumferential surface of the shaft to interfere with the guide rail. A rail groove for receiving is formed so that the shaft is movable in the longitudinal direction of the cylinder when the guide rail and the rail groove are engaged. In the state where the shaft is hidden inside the cylinder, the engagement between the guide rail and the rail groove is released, so that the guide rail is formed to rotate the shaft. Drum detachment mechanism. A mechanism for attaching and detaching a photosensitive drum to a cartridge fixing hole of an image forming apparatus, A flange protrudes in an outer circumferential direction of one end, and the other end is inserted into the photosensitive drum while the flange is caught by the front end of the photosensitive drum, and has an accommodation space formed through the photosensitive drum. A cylinder having a jaw formed at one end of the inner circumferential surface of the one end of the opening in the accommodation space to be smaller than the opening of the other end; A groove for engaging the driver is formed in the tip surface, and a protrusion is formed on the outer circumferential surface so as to interfere with the jaw, and in the longitudinal direction of the photosensitive drum in the receiving space so that one end protrudes out of the opening or is concealed into the opening. A shaft formed to be movable; A blocking member fixed to the cylinder with the shaft interposed therebetween; A spring compressed between the blocking member and the shaft; Including, the shaft protrudes into the opening by the spring and is inserted into the cartridge fixing hole so as to pivotally support the photosensitive drum, In the receiving space, a guide rail for guiding movement of the shaft in the longitudinal direction of the cylinder extends from the jaw to protrude on an inner circumferential surface, and the protrusion is formed with a rail groove for accommodating the guide rail. In a state where the rail and the rail groove are engaged, the shaft is movable in the longitudinal direction of the cylinder, In the state where the shaft is hidden inside the cylinder, the engagement between the guide rail and the rail groove is released, so that the guide rail is formed to rotate the shaft. Drum detachment mechanism.

Images