JPS62209468A - Developing device for recording device - Google Patents

Abstract

PURPOSE:To connect a developing device electrically by only the operation in which the developing device is covered with a development cover by enabling the developing device to be loaded in an unloaded from a recording device and providing a connector part which connects the terminal pin of the development cover supported pivotally on the recording device when the developing device is loaded. CONSTITUTION:The development cover 39 provided to the main body 1 is rotated to cover the top surface of the developing device 9. The connector part 41 provided to an upward connector terminal 40 is provided at one side part of the developing device 9 and the connector terminal pin 42 is projected from the development cover 39 at the part facing the connector terminal 40; and then the development cover 39 is rotated after the developing device 9 is positioned in the hollow part 1a of the main body to cover the top surface of the developing device 9, so that the connector terminal pin 42 connects with the connector terminal 40 of the developing device 9. Therefore, the developing device 9 needs to be supplied with electric power, but powered on by only the operation in which the development cover 39 is merely rotated.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a developing device in a recording device, and particularly relates to a developing device in a recording device that is removable from the recording device and can be easily electrically connected. It is something.

[Prior art and its problems]

Generally, some developing devices used in recording devices are removable from the main body of the recording device in order to replenish toner to a hopper provided at the top of the developing device. After that, it is necessary to make an electrical connection, which requires the necessary cable connection work, which poses a problem in that it becomes a very complicated work.

This invention solves the above-mentioned problems of the conventional ones, and is easy to carry, as well as being easy to carry, and only requires installing it on the recording device and covering it with a developing cover that is pivotally attached to the recording device. It is an object of the present invention to provide a developing device in a recording apparatus that can make the necessary electrical connections to the developing device.

[Means for solving problems]

In order to solve the above problems, the present invention has developed a system in which an electrostatic latent image on the circumferential surface of an image carrier is turned into a toner image using a developing device having a hopper at the top, and then transferred and fixed onto recording paper. In the recording device, the developing device is of a cartridge type and is removable from the recording device, and the developing device is provided with a connector portion that connects to a terminal pin of a developing cover pivotally attached to the recording device when installed. This method adopted the following methods.

[Effect]

By adopting the above-mentioned means, this invention makes it possible to electrically connect the developing device by simply mounting the developing device on the recording device and then covering it with a developing cover pivotally attached to the recording device. It becomes possible.

〔Example〕

Embodiments of the invention shown in the drawings will be described below.

FIG. 1 shows an overall schematic diagram of an electrophotographic copying apparatus in which the apparatus according to the present invention is installed, in which a document glass stand 2 is mounted on the upper surface of the main body L so as to be reciprocatable in the horizontal direction (in the horizontal direction in the figure). At the same time, the top surface was opened and
A coverable platen cover 3 is provided.

+7ii A paper feed cassette 4 storing a bundle of paper is removably disposed at the lower part of one side of the main body 1, and a paper ejection tray 5 is provided at the lower part of the other side.

On the other hand, a photoreceptor drum 6 serving as an image carrier is rotatably disposed in the center of the interior of the main body 1.
A convergent light transmitting body 7 is located above, and a charging device 8 is located on the front side of the convergent light transmitting body 7 in the rotational direction of the photosensitive drum 6. A developing device 9, a transfer pole 10, and a cleaning device 11 are arranged in this order on the front side.

An exposure lamp 12 for irradiating light onto the original glass table 2 is provided on the side of the convergent light transmitting body 7, and an exposure lamp 12 is provided above the convergent light transmitting body 7 and from the exposure lamp 12. A support roller I3 supporting the lower surface of the original glass table 2 is disposed at a position that does not obstruct the optical path leading to the convergent light transmitter 7.

A half-moon roller 14 is provided above the paper feed cassette 4 located in the lower part of the main body 1, and a paper feed cassette 4 is provided in front of the paper feed cassette 4 in the paper transport area.
An actuator 16 of a detection member 15 is provided to detect when the paper is ejected from the paper, and a pair of upper and lower paper refeed rollers 17a, 1 is provided in the transport area in front of the detection member 15 in the paper transport direction.
7b, and a locking member 18 that locks with the leading edge of the paper to stop conveyance of the paper is located in front of the paper refeed rollers 17a and 17b.

The lower surface of the IB feeding path ahead of the paper refeeding rollers 17a and 17b in the paper conveyance direction is connected to a toner collection box 19 located below the developing device 9, the photosensitive drum 6, and the cleaning device 11. The transfer pole 10 is formed on the upper surface and is located within the recess 20 of the toner collection box 19 .

A toner collection box 19 located below the developing device 9, photoreceptor drum 6, and cleaning device Zll collects collected toner that falls from a drop opening located on the back side of the cleaning device 11 in FIG. The receiver has a collection port.

A fixing device 21 is provided adjacent to the toner collection box 19 on the opposite side of the paper feed cassette 4.

Note that 22 is a separation claw provided at the lower part of the cleaning device 11 and located in the conveyance path, 23 is a drive source, and 24 is an attachment for lifting the middle plate inside the paper feed cassette 4. A force member 25 is a hopper located above the developing device 9.

The electrophotographic copying apparatus configured as described above can lift the front side upward using the lower edge of the rear side as a fulcrum, and in the raised state, the toner collection box can be moved upward by the lower edge of the rear side. By pushing down the front side using the fulcrum as a fulcrum, the lower portions of the developing device, photosensitive drum, and cleaning device can be opened.

When operating the device configured as described above, first place the original on the top surface of the original glass table 2, cover it with the platen cover 3, perform operations on the operation panel, and then perform the copying operation. When the image of the original is irradiated by the exposure lamp 12, the original glass table 2 starts to move back and forth in the horizontal direction with the original covered by the platen cover 3 placed on its upper surface. 1
2 reaches the upper surface of the photoreceptor drum 6 via the convergent light transmitter 7, while the photoreceptor drum 6 is charged by the charging device 8 before reaching the lower side of the convergent light transmitter 7. As a result, an electrostatic latent image corresponding to the original image is formed on the surface of the photosensitive drum 6.

Thereafter, as the photoreceptor drum 6 rotates, it is developed into a toner image by a developing device 9, while the uppermost sheet of paper in the paper feed cassette 4 is sent out sequentially by a half-moon roller 14 and is driven by an actuator 16 of a detection member 15. Then, it passes through a pair of upper and lower paper refeed rollers 17a and 17b, and is stopped by a locking member 18 located in the conveyance path, and is temporarily on standby.

Thereafter, the paper is fed again at a predetermined timing, and the toner image on the surface of the photosensitive drum 6 is transferred to the recess 2 of the toner collection box 19.
After being positioned on the upper surface of the paper by the action of the transfer pole 10 located within 0, the paper on which the toner image has been transferred is separated from the photosensitive drum 6 by a separation claw 22 and conveyed to the fixing device 21.

The fixing device 21 fixes the paper using pressure and heat, and the paper is discharged onto the upper surface of the paper discharge tray 5.

On the other hand, after the paper has been separated, the photosensitive drum 6 is cleaned by the cleaning device 11 in preparation for the next copying, and the toner scraped off during cleaning by the cleaning device 11 is collected from the drop opening of the cleaning device 11. It falls into the collection box 19 and is stored there.

Regarding the relationship between the developing device 9 and the photoreceptor drum 6 of the electrophotographic copying apparatus configured as described above, first, the entire developing device 9 is in the form of a removable unit as shown in FIG. A predetermined gap a in the width direction in the space la of 1
It can be installed with a
As shown in the figure, a developing sleeve 32 is close to the photosensitive drum 6, and an agitation roller 31 and the developing sleeve 32 are installed between the casing 30 of the developing device 9, and the circumferential surface of the developing sleeve 32 In other words, there is a slight distance from the photoreceptor drum 6.

The side surface of the developing device 9 is rotatable;
In addition, a locking member 33 having a hook portion 34 is provided, and the handle portion 35 can be extended in two stages, and the rear ends of both hook portions 34 are connected by a gripping portion 36. Furthermore, a lever 37 for unlocking is provided at one end of the gripping portion 36.

After positioning the developing device 9 in the empty space la of the main body 1, the two-stage handle portion 35 is shortened and then rotated to the front side, that is, counterclockwise in FIGS. 2 and 3. The hook portion 34 of the locking member 33 is attached to a pin 38 provided on the main body 1 and protruding into the space la.
The developing device 9 is thereby engaged with the space la of the main body 1.
It is fixed inside.

Thereafter, the developing cover 39 provided on the main body 1 is rotated to cover the upper surface of the developing device 9. As shown in detail in FIG. 4, one example of the developing device 9 has an upward connector terminal. 40 is provided,
Further, since a connector terminal pin 42 is protruded from the portion of the developing cover 39 facing the connector terminal 40, the developing cover 39 can be rotated after the developing device 9 is positioned in the space 1a of the main body l. When the upper surface of the developing device 9 is covered, the connector terminal pin 42 is connected to the connector terminal 40 of the developing device 9.

Therefore, although it is necessary to supply power and the like to the developing device 9, power and the like can be supplied to the developing device 9 by simply rotating the developing cover 39.

The drive transmission system of the developing device 9 is as shown in FIGS. A driving gear 44 is provided at the bottom of the developing device 9,
This developing device driving gear 44 includes a developing sleeve driving gear 45 that drives the developing sleeve 32 and an agitation roller 3.
A stirring roller driving gear 4G that drives the hopper 25 meshes with the stirring roller driving gear 4G, which is provided at the lower part of the hopper 25 and supplies toner to the stirring roller driving gear 46 via two idler gears 47 and 48. Toner supply roller 49 rotates to
A gear 51 rotatably provided on the shaft 50 meshes with the shaft 50 .

The coupling gear 43 and the developing device driving gear 44 have a ten-point dislocation, and as shown in FIG. 7, the thickness of the chord tooth at the tooth tip is small, and the developing sleeve driving gear 45 and the stirring roller driving gear 46, as shown in FIG. The shaft 5 is inserted into the hole 54 of
2, and the two gears 45 and 46 can be rotated by a predetermined angle with respect to the shaft 52 without rotating the shaft 52, that is, in a free state, so that the developing The device drive gear 44 is also rotatable.

Therefore, when the developing device 9 is located in the space la of the main body 1, the developing device driving gear 44 is very easy to rotate with respect to the coupling gear 43, so that the developing device driving gear 44 can be easily rotated with respect to the coupling gear 43 and the developing device driving gear 44 can be rotated very easily. Coupled with the fact that the chord tooth thickness of the gear light with the drive gear 44 is small, the drive transmission system can be reliably connected by simply inserting the developing device 9 into the space la of the main body 1. .

Further, as described above, a gear 51 is rotatably attached to the shaft 50 to which the toner supply roller 49 that rotates to supply the toner is connected, and a ratchet 56 is integrally attached to the gear 51. A lever 57 is provided at the end of the shaft 50 of the toner supply roller 49.
A ratchet pawl 58 that engages with the ratchet 56 of the gear 51 is pivotally attached to one end of the lever 57, and a spring 59 is stretched between the ratchet pawl 58 and the other end of the lever 57. The ratchet pawl 58 is biased in the direction of engagement with the ratchet 56.

The ratchet pawl 58 is held apart from the ratchet 56 against the biasing force of the spring 59 by being engaged with an actuator 61 that is rotated by a solenoid 60.

Therefore, when the developing device 9 is installed in the space la of the main body 1, the developing device driving gear 44 meshes with the coupling gear 43, a drive transmission system is established, and the developing sleeve 32 And the stirring roller 31 rotates.

During the above-described operation, when the toner in the hopper 25 decreases, when replenishing the toner,
First, when the solenoid 6o is activated, the actuator 61 rotates due to the activation of the solenoid 60.
The engagement with the ratchet pawl 58 is released, and the ratchet pawl 58 engages with the ratchet 56 integrated with the gear 51 by the biasing force of the spring 59, thereby causing the gear 51,
The driving force of the coupling gear 43 is transmitted to the ratchet 56, the ratchet pawl 58, the lever 57, and the shaft 50 of the toner supply roller 49.
rotates, whereby the toner in the hopper 25 is supplied into the developing device 9.

When the toner in the hopper 25 runs out,
Take out the entire developing device 9 from the space 1a of the main body l,
Toner is supplied into the hopper 25. At this time, first, the developing cover 39 is rotated upward to open the upper part of the developing device 9, and at the same time, the connector terminal pin is released from the connector terminal 40 of the connector portion 41. 42 will be removed.

After that, when the lock release lever 37 provided on the gripping portion 36 between the f and end of the handle portion 35 of the locking member 33 is pressed, the locking member 33 rotates and the hook portion 34 is moved to the main body l. When the handle part 35 is released from the engagement with the pin 38 protruding from the pin 38 and the handle part 35 is pulled by the gripping part 36, the developing device The distance between the developing device 9 and the developing device 9 can be widened (therefore, the operator's hand can fully fit in, and the operator can then take out the developing device 9 from the main body 1 of the electrophotographic copying machine by simply holding the gripping portion 36 and operating the drawer. It is something that can be done.

〔Effect of the invention〕

By configuring the present invention as described above, the developing device can be electrically connected by simply covering the developing device with the developing cover of the recording device after the developing device is housed in the recording device. It has excellent effects such as making electrical connection work very easy and significantly increasing work efficiency.

[Brief explanation of drawings]

FIG. 1 is an overall schematic diagram of an electrophotographic copying apparatus equipped with the one according to the present invention, FIG. 2 is a schematic perspective view showing the relationship between a recording device and a developing device, and FIG. 3 is a schematic vertical sectional view. 4
The figure shows the relationship between the connector part and the developing cover, Figure 5 is a schematic diagram showing the drive transmission system, Figure 6 shows the relationship between gears, and Figure 7 shows the coupling gear and developing device drive gear. FIG. 8 is a diagram showing the relationship between the developing sleeve driving gear and stirring roller driving gear, shafts and bottles, and FIG. 9 is a schematic longitudinal sectional view of the one shown in FIG. 5. . 1... Main unit 2... Original glass stand 3... Platen cover 4... Paper feed cassette 5... Output tray 6... ... Photosensitive drum 7 ... Convergence light transmission body 8 ... Charging device 9 ... Development device 10 ... Transfer pole 11 ... ... Cleaning device 12 ... Exposure lamp 13 ... Support roller 14 ... Half-moon roller 15 ... Detection member 16.61 ... Actuators 17a, 17b
. . . Paper refeed roller 18.33 . . . Locking member 19 . . . Toner collection box 20 . . . Recessed portion 21 . ... Separation claw 23 ... Drive source 24 ... Biasing member °25 ... Hopper 30 ... Casing 31 ... - Stirring roller 32...Developing sleeve 34...Hook part 35...Handle part 36...Grip swing part 37...For unlocking Lever 38...
- Bin 39... Developing cover 40... Connector terminal 41... Connector part 42... Connector terminal pin 43... Compling gear 44 ...Developing device drive gear 45...Developing sleeve drive gear 46...
...Agitation roller drive gear 47.48...Idler gear 49...Toner supply roller 50.52...Shaft 51...Gear 53... ... Central hole 54 ... Hole 55 ... Drive pin 56 ... Ratchet 57 ... Lever 58 ... Ratchet pawl 59 ... ... Spring 60 ... Solenoid Figure 2 Figure 6 Figure 8 Figure 9 Procedural amendment (July 10, 1985)

Claims (1)

[Claims] In a recording device in which an electrostatic latent image on the circumferential surface of an image carrier is converted into a toner image by a developing device having a hopper at the top, and then transferred and fixed onto recording paper, the developing device is of a cartridge type. A developing device for a recording device, wherein the developing device is detachable from the recording device, and is provided with a connector portion that connects to a terminal pin of a developing cover pivotally attached to the recording device when attached. .