JPH059729Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a developing device used in a recording device such as an electrophotographic copying machine, and particularly relates to a developing device that is detachable from the recording device.

[Background of the idea]

2. Description of the Related Art Developing devices that are removably attached to recording devices are increasingly being used in order to improve the efficiency of manufacturing, inspecting, and maintaining recording devices and developing devices, replacing developing devices, and replenishing toner. A detachable developing device is relatively easy to attach and detach;
Many systems employ a method in which the recording device is inserted into the recording device and set. In such a conventional developing device, in order to accurately set the position with the image forming drum, the developing device is pushed toward the image forming drum during setting, and a contact provided separately on the image forming drum or the recording device main body is used. It was in contact with the member. In such a developing device, if the engaging means for setting the developing device with the recording device main body does not sufficiently push the developing device toward the image forming drum when engaged, the developing device is likely to separate from the image forming drum. Therefore, it is necessary that the engaging means not only push the developing device downward when engaged, but also push it toward the image forming drum.

[Purpose of invention]

In the present invention, when the developing device is dropped into the recording device, it is pushed toward the image forming drum by its own weight, and its position with respect to the image forming drum is accurately regulated. It is an object of the present invention to provide a removable developing device in which an engaging means for engaging with a recording device main body side only needs to press the developing device downward by engagement.

[Structure of the idea]

When the present invention is dropped into the recording device, it comes into contact with the receiving surface on the recording device main body side and its position is regulated, and by engaging the engagement means with the recording device main body side, the contact with the receiving surface is made. In a removable developing device whose position is set by increasing the pressure, the contact is between the protrusions provided on both upper sides of the developing device and the guide groove surfaces of the depressions provided inside the both side frames of the recording device main body. , the contact between the rollers provided at the bottom of both sides of the developing device and the circumferential surfaces on both sides of the image forming drum provided on the recording device main body side, and the contact between the rollers provided at the bottom of the developing device and the image forming drum provided on the recording device main body side. The present invention provides a developing device that is detachable from a recording device and is characterized in that it is in contact with an inclined surface that faces toward the side and faces upward, and this configuration achieves the above object.

〔Example〕

The present invention will be explained below using illustrated examples.

Figures 1 and 2 are partial side views of the recording apparatus showing the developing device of the present invention inserted into the recording apparatus and set, respectively, and Figure 3 is a partial view of Figure 2 seen from the right side. It is.

In the figure, 1 is a developing device, 2 is a shaft protruding outward from the left and right side walls of the developing device 1, 3 is a lock lever rotatably fitted on the shaft 2, and 4 is a developing sleeve on the left and right sides of the developing device 1. 5 is a roller provided coaxially with 5, 6 is a roller provided at the bottom of the developing device 1, 7 is a guide groove provided inside both side frames of the recording device body into which the tip of the shaft 2 enters, 8 is an engaging arm 3 of the lock lever 3.
1 is an engaging member provided on both side frames of the recording apparatus body, 9 is a circumferential surface on both sides of the photoreceptor drum that the roller 4 contacts, and 10 is a photoreceptor drum provided on the frame of the recording apparatus body that the roller 6 is in contact with. It is an inclined surface that faces both sides and upwards.

The developing device 1 is taken out from the recording device by raising the lock lever 3 as shown in FIG. 1, holding the handle 32 provided on the lock lever 3, and pulling it upward. The developing device 1 is placed in the recording apparatus by holding the handle portion 32 and dropping the developing device 1 so that the tip of the shaft 2 enters the guide groove 7 as shown in FIGS. 1 to 3. As a result, the roller 6 moves to the inclined surface 10.
The reaction force of the inclined surface 10 pushes the roller 6 and causes the lower part of the developing device 1 to swing toward the photosensitive drum. The body swings toward the drum side, and
The developing device 1 operates in the recording device by contacting the right groove surface of the guide groove 7 of the shaft 2, contacting the inclined surface 10 of the roller 6, and contacting the circumferential surface 9 of the roller 4. Its position is regulated and it occupies an accurate position relative to the photoreceptor drum. Therefore, set the lock lever 3 to the second position.
If you tilt it as shown in the figure, the lock lever 3 will move to the shaft 2.
The annular portion 33 fitted into the cutout portion 33a
Since the right half of the annular portion 33 in FIG. 1 and the upper half in FIG. The convex portion 8a of the engaging member 8 comes to engage with the concave portion 31a of the joint arm 31, and the restoring force of the elastic deformation of the annular portion 33 pushes the developing device 1 downward, and the roller 4
and the circumferential surface 9, the roller 6, the inclined surface 10, and the shaft 2.
The contact pressure between the guide groove 7 and the guide groove 7 is increased, and the developing device 1 is set.

The present invention is not limited to the illustrated example, but an engagement means for setting the developing device may be provided on the recording apparatus main body side and push the developing device downward, or the lock lever 3 as in the illustrated example may be provided. The engaging arm 31 may be configured to be elastically circular, and the annular portion 33 may be a normal shaft fitting portion.

[Effect of idea]

When the developing device of the present invention is dropped into the recording device, it is pushed toward the image forming drum by its own weight, and its position with respect to the image forming drum is accurately regulated. This has the effect that the engaging means with the main body side only needs to be structured to hold the developing device downward.

[Brief explanation of the drawing]

Figures 1 and 2 are partial side views of the recording apparatus showing the developing device of the present invention inserted into the recording apparatus and set, respectively, and Figure 3 is a partial view of Figure 2 seen from the right side. It is. DESCRIPTION OF SYMBOLS 1... Developing device, 2... Shaft, 3... Lock lever, 31... Engaging arm, 32... Handle portion, 33...
Annular portion, 4, 6... roller, 5... developing sleeve, 7... guide groove, 8... engaging member, 9... circumferential surface, 10... inclined surface.

Claims (1)

[Scope of utility model registration request] When dropped into the recording device, it comes into contact with the receiving surface on the recording device main body side and its position is regulated, and the contact pressure with the receiving surface is increased by engaging the engagement means with the recording device main body side. In a removable developing device whose position is set by the developer, the contact is between the protrusions provided on both upper sides of the developing device and the guide groove surfaces of the drop-in provided inside the both side frames of the recording device main body, and Contact between the rollers provided at the bottom of both sides and the circumferential surfaces on both sides of the image forming drum provided on the recording device main body side, and contact between the rollers provided at the bottom of the developing device and the image forming drum provided on the recording device main body side and A developing device removably attached to a recording device, characterized in that the developing device is in contact with an upwardly facing inclined surface.