JPS60151665A - Electrifying device - Google Patents

Abstract

PURPOSE:To permit easy assembling of the unit itself and installation to an electrifying device body by attaching a spring to one end of a corona discharge body, attaching turnably a shaft body to be wound with the corona discharge body to the other and unitizing the assembly to one unit. CONSTITUTION:A spring 12 is attached to one end of a corona discharge body 2 and the opposite side of a spring 12 is attached to an insulating terminal support 4 and is electrically connected to a terminal 6. An insulating shaft support 3 is engaged with the support 4 at a projecting part 3b and a recess 3a to form a unit. The body 2 is wound on a turnable shaft 1 and is supported by a bearing part 10. The length of the body 2 is so set that said body is completely unwound when mounted to the electrifying device body and that adequate tension id given thereto by the spring 12. Installation of the device is accomplished by inserting the terminal 6 to a terminal not shown, disconnecting the parts 3a, 3b and engaging the support 4 and the support 3 to the electrifying device not shown. The assembly of the discharge unit and the installation thereof to the electrifying device are thus easily accomplished and the damage during storage and transportation is prevented.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a charging device used in an electrostatic recording device such as an electrophotographic copying machine, and particularly relates to an improvement in a charging device that performs corona discharge.

[Prior art]

For example, in an electrophotographic copying machine, a charging device that performs corona discharge is used to uniformly charge the surface of a photoreceptor layer made of Se or the like. This charging device has a diameter of 0.1 vn
A corona discharge body consisting of an electrode wire of approximately 100 to 100 V was stretched parallel to the photoconductor layer at a voltage of 10 to 15 Vrn from one photoconductor circle, and a voltage of approximately 6000 VD, C was applied to the photoconductor layer. Charge.

The corona discharge material is stretched with appropriate tension on an image carrier such as a photoreceptor, but since it is a thin wire, it cannot be handled gracefully, and it requires complicated preparations to adjust the tension. did. As a known technique, there is a device having an unwinding pulley for winding and storing a corona discharge body and a winding pulley for winding up a used discharge body (GFJ Publication No. 1987-9433).
, and an apparatus in which a corona discharge body is wound around a roll (Japanese Unexamined Patent Publication No. 48-92027) has been disclosed. It is known that a corona discharge body is wound around a roll or a pulley and installed in a charging device, but there must be a girder structure that provides the necessary tension when the corona discharge body is installed. The corona discharge body that is wound around the body will unravel and cannot maintain its tension, so a mechanism is essential to prevent this unraveling and apply the necessary tension to the corona discharge body, which is inevitably complicated. It was a charging device made by M Tech.

[Purpose of the invention]

The corona discharge body t1 in the charging device 7 (because it has a wire-like shape and is weak and easily twisted, the portion of the charging device that includes the corona discharge body is made into a unit so that it can be easily and easily assembled into the entire charging device). By making the corona discharge body more compact and unitizing it when replacing the corona discharge body, we can provide a charging device that is easy to replace during storage, transportation, assembly, etc. and prevents damage to the corona body. - Aimed at loco.

[The unfortunate result of invention]

The present invention aims to achieve the above-mentioned object, and the present invention has a spring-like body at one end of a corona discharge body having the shape of /(f4 F, and the corona discharge body is mounted at the other end of the corona discharge body. The present invention provides a charging device characterized in that it has a single mountain body that can be rotated, and has a shaft support member inserted into which the cough shaft member can be turned.

That is, in the present invention, one end of the corona discharge body having a preset length has a spring-like body, and the other end of the corona discharge body is fixed to a split part of the shaft body or a circumferential part of the shaft body. After that, almost all of the corona discharge body was installed on this shaft body, and this 1111 attachment was inserted into a box-like support so that it could be rotated with a moderate Q7X force, and this was used as a unit. A charging device designed to be attached to the
” 1. To attach the Uni-node to the charging device body, insert the shaft support into the charging device body, and then hold the spring-like body and push the corona discharge body against the frictional force. Pull out the spring-like body from the other end of the charging device main body ((insertion and mounting completed)).

In addition, when the corona discharge body is pulled out by holding the above-mentioned spring-like body, the degree of moderation is such that the corona discharge body does not come undone by itself due to the frictional force acting between the Gh body and the 111 support body. Since the corona discharge body has a length, the corona discharge body is stretched so as to be unwound and kinked without being disturbed by moderation. It shall be set to a length necessary to be unwound and to receive the tension of the spring-like body.

〔Example〕

Figures 1 to 40 show embodiments of the present invention.
Fig. 2 shows a perspective view of one example of a charging device, and Fig. 2 is a sketch of 13 bodies of the present invention in which a corona discharge body is wound.

Figure C'f 3 is a plan view of a corona discharge unit equipped with the 11 body shown in Figure 2 and a corona release body. 'l'j
40 is the third [split unit into two 1. / '+'f7
The state in which the electrical equipment is installed is shown in [Explanation 1].

A' for tungsten, stainless steel, etc. 'I f+54 corona discharge body 2 has -,67''4 in a loop shape,
A cylindrical T! 'i! + Fixed t7 by hooking it on the slot 11 cut into the body volume of the rest 1, Habo charging device main body 1
A corona discharge body 2 set to a length corresponding to the total length when fully equipped is wound around this shaft l, and a coil spring 12 is connected to the corona discharge body 2 and g14. The shaft body 1 surrounding the corona discharge body 2 is rotatably inserted into a bearing portion 10 provided on the shaft support body 3 of the knotted Tomoe-ryokujiru.

The degree of fitting between this Qql body 1 and the bearing portion 10 is determined by
When the corona discharge body 2 is exposed to the surface, it naturally loosens, and the fit is such that it has a high degree of abrasion resistance. The coil spring 12 has a node-like insulating structure ('a banana chip-shaped body fixed to the body 4', ?fi, l, +" of the coil spring 6).
1 and is electrically connected. This ij”, (
Z,! , : interlocking convex portion 3b provided with three rests, and i
By engaging the engagement recess 4b provided in the body 4, the G11 support 3 and the terminal support 4 form a box-shaped support 3 as shown in Figure 3. The corona discharge body is easily handled as a unit, and there is no risk of damage to the corona discharge body during storage or transportation.

When assembling these 1st and 2nd units to the main body 9 of the belt mounting f'1, the 7b support convex portion 3a provided on the own support 3 separates the CI support 3 and the 100 support 4. (J?) is pushed into the main body recess 8 provided in the main body 9 of the electrical equipment, and then, holding the terminal support 4, the corona discharge body 2 wrapped around the shaft IK is connected to the resistance in the bearing part 10. Pull it out against the pressure and insert and fix the terminal support protrusion 4a provided on the terminal support 4 into the main body recess 8' provided on the charging device main body 9. The installation of the device is completed.The corona discharge body 2, which was wound around the shaft l, is now expanded without being disturbed or twisted by the frictional resistance mentioned above, and the corona discharge body 2 has been adjusted to an appropriate length in advance. Since the corona discharge body 2 is set to be under moderate tension by the coil spring 12, it is stretched to the charging device 197 body. Assembling the charging device is completed by simply releasing the connection and inserting it into the main body 9 of the charging device, so there is no risk of damage to the corona discharge body 2 during transportation or installation, and there is no risk of damage to the corona discharge body 2. The need for h1 adjustment of the tension in 2 is also heat < 7.C.

The present invention has the above-mentioned effects, but when implementing it, how far is it supplied as a unit?
I would like to correct it because there are 5 points in each of the f1 states,
Next, second and third embodiments will be described.

5 to 9 show a second embodiment of the present invention, and FIG. 5 1 shows a shaft 21 in which a corona discharge body 22 is wound.
- Shows a sketch. 6 is a plan view of the corona discharge unit equipped with the shaft body 21 and the corona discharge body 22 shown in FIG. 9 is a sectional view of the corona discharge unit attached to the main body of the band'rri device, and FIG. 9 is a perspective view of the charging device of this embodiment.

One end of the wire-shaped corona discharge body 22 is inserted into the slot 31 of the insulating cylindrical shaft body 21 and fixed.
It is the same as in the first embodiment that substantially the entire predetermined length of the corona discharge body 22 is wound around the corona discharge body 22, and the corona discharge body 22 is inserted into the shaft support body B. A coil spring 32 is attached to the other end of the corona discharge body.
The coil spring 32 is connected to one end of the coil spring 32, and the other end of the coil spring 32 is attached to one end of a contact spring 33 which is fixed to the contact spring support row and is in electrical contact with the contact spring support row. This contact spring support 24 has a frff structure that engages with the dynamic support member to form one single suspension unit, as in the case of the first example. The method of assembling this unit to the charging device main body 29 is exactly the same as in the first embodiment, but in this case, a banana chip-shaped terminal 26 is fixed to one end of the charging device main body 29, and a contact point is provided. Charge the spring support 24'j,! ,,"By mounting it outside the main body, the contact spring 33 contacts the local part of the terminal and electrically connects it, and the corona discharge body 22
is held in a tensioned state by a coil spring 32.

A third embodiment of the present invention is shown in FIGS. 10 and 11.

! The IN 1.0 diagram is a cross-sectional view of the corona discharge unit.
FIG. 11 is a sectional view of the corona discharge body shown in FIG. 10 attached to the main body of the charging device.

In FIG. The body 41 is clamped to the ill wall 43a of the ζh supporting body 3 to form a unit.

When assembling this unit to the charging device main body 49, first attach the 1Iil Rollet 43 to the charging device main body 29, then remove the terminal contact piece 46 from the side part 43a of the shaft support 43, and then remove the corona discharge body 42. is clamped and fixed to the main body protrusion 57 which is fixedly provided inside the charging device main body 49 by resisting the friction of the fitting part from the first rest 41. Therefore, 5
':i+i The child contact piece 46 has a structure in which it is welded to the local terminal welding piece 55 of the terminal 5G, which is fixed to the charging device main body 49. In this case, the other end 46a of the terminal contact piece 4G acts as a spring and applies appropriate tension to the corona discharge body 42 which is stretched.

Each of the above-described implementations has a structure that is folded together into a unit to facilitate handling and assembly, but in the second embodiment, the terminals are connected to the charging device main body 29f! Because it is provided in L, unit and G are the first
It was cheaper than the actual t1 example. In addition, in the third embodiment, the unit part is made up of only the shaft support 43 and a few other parts, so that the unit 1. The bottom part has a cheaper structure.

〔Effect of the invention〕

According to the present invention, by unitizing the portion including the corona discharge body, assembly into the charging device main body is facilitated and ensured, and the assembly of the unit itself is facilitated, and the 9 degrees of the assembled charging device is maintained. A charging device covered with a corona discharge body that does not cause damage to the corona discharge body when the unit is stored, transported, assembled, etc. will be provided. Ta.

[Brief explanation of drawings]

Figures 1 to 4 show the first embodiment by Mizumoto C], and are perspective views of the construction 1 Figure 1-1#'+\\ electric equipment, and Figure 2 is a corona discharge body on the shaft body. FIG. il': 31''<1 is a plan view of the corona discharge body unit, and Figure 214 is an explanatory view of the unit being divided into two parts and attached to the charging device main body. Figures 5 to 9 illustrate the present invention. FIG. 5 is a sketch of the corona discharge body being wound around the shaft, FIG. 6 is a plan view of the corona discharge body unit, and FIG. 7 is a cross-sectional view thereof. Figure 8 is a sectional view of the unit and unit mounted on the charging device body, and Figure 9 is a perspective view of the charging device. Figures 10 and 11 are drawings of a third embodiment according to the present invention. Fig. 10 is a cross-sectional view of the corona discharge body unit, and Fig. 11 is a cross-sectional view of the corona discharge body unit attached to the charging device main body. 1.21.41... Shaft body 2, 22, 42...
Corona discharge body 3.23, 43...Shaft support 3a, 23a...Shaft support convex portion 3b...Matching convex portion 4...Terminal support 4a...
・Terminal support protrusion 4b...Matching recess 6, 26
, 56...Terminal 8, 8'...Four parts of main body 9.29
．． /+9...4jT electrical equipment body 10...bearing part 1
1, 31... pickpocket? J 12, 32... Coil spring 33... Contact spring 24... Contact spring supporter 55
...Terminal contact part 4G...pl, j5 welding piece 57
...Main body protrusion agent Patent attorney No 1) [t Deaf

Claims (1)

[Claims] One end of the linear corona discharge body has a spring-like body, the other end has a shaft body around which the corona discharge body is wound, and the core shaft body is rotatably pushed into the dynamic support. A belt characterized by having a body? ! ! Device 11°