JP2001228659A - Image recorder - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an image recorder having simple structure that electric conduction is obtained while interrupting vibration between an object to be attached and a fixed plate. SOLUTION: A rubber bush 10 made of conductive rubber is attached to a side plate 2, and a metallic collar 9 is fit in the hole of the bush 10, a screw 5 is made to pass through the hole of the collar 9 and screwed, tightened and fixed in the female screw hole of the base plate 4 of a motor unit 3 inside the side plate 2. A motor 7 is not attached to the side plate 2 and attached in a state where it floats from the side plate 2 through the bush 10. The vibration generated from the motor 7 is not transmitted to the side plate 2, and the bush 10 directly comes into contact and conducts with the side plate 2, so that an electric conduction state from a motor housing to the side plate 2 is kept, and a ground cable and a leaf spring are not required.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an image recording apparatus using a drive source such as a motor and an image recording apparatus using a storage device such as a hard disk drive, and more particularly to an improved structure for fixing components such as a motor and a hard disk drive. About what you did.

[0002]

2. Description of the Related Art In an image recording apparatus, a plurality of motors such as a scanner motor, a drum motor, and a paper feed motor are used to supply a driving force to each unit. It is.

However, if the vibration of the motor is transmitted to the original reading section (scanner), the writing section (laser diode, polygon motor), and the photosensitive drum through the motor bracket or the side plate, the image quality such as pitch unevenness and jitter is deteriorated. It is known that the probability increases.

As a means for preventing or suppressing these problems, a structure is used in which a rubber bush is used for mounting the motor so that the motor and the side plate do not come into direct contact with each other. In a configuration in which the motor is not directly mounted on the side plate, for example, in a configuration in which the motor is mounted on the side plate via a motor bracket, a similar effect can be obtained by disposing a rubber bush between the motor and the bracket or between the bracket and the side plate. ing. These technologies include:
For example, Japanese Unexamined Utility Model Publication No. 06-010950 (the vibration transmission between the upper and lower units is suppressed by rubber),
Japanese Patent Application Laid-Open No. 05-28383 (using seismic rubber with a twist between the motor and the mounting plate)
No. 1 (prevents vibration transmission and suppresses elastic deformation).

On the other hand, the image forming apparatus needs to meet the EMI (Electromagnetic Interference) standard (VCCI class B, etc. in Japan). Various measures such as optimization of wiring patterns and enhancement of frame ground are taken.

The above-described motor mounting method is a state in which the motor itself is electrically floating from the frame ground, and is very unstable from the viewpoint of the EMI standard.
It is highly likely that measures will be required. In particular, in recent years, margins have been reduced due to the effects of higher operating speeds, higher functions, compactness, and consolidation, and the need for countermeasures has increased.

As a general countermeasure method, there is a method in which a ground wire is taken out from a motor (motor board) and fixed to a side plate, or a metal leaf spring is attached to the side plate to make the motor and the side plate conductive. However, improvement is required in both cases because the cost increases due to the increase in the number of parts and an additional assembling operation occurs.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned conventional problems, and provides an image recording apparatus having a simple structure capable of obtaining electrical continuity while blocking vibration between an object to be mounted and a fixing plate. With the goal.

[0009]

According to a first aspect of the present invention, there is provided an image recording apparatus for preventing vibration from a component serving as a vibration source from being transmitted to a main body frame. An image recording apparatus comprising: a fixing member that fixes the component to the main body, wherein the fixing component is fixed to the main body frame via a rubber bush. Has conductivity.

In order to achieve the above object, the image recording apparatus according to the present invention is characterized in that the constituent parts are drive motors such as a drum motor and a sheet feeding / conveying motor.

According to a third aspect of the present invention, in order to achieve the above object, the component is a storage device such as a hard disk drive or a CD-R / RW.

[0012]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is an exploded perspective view showing a mounting structure of a drive motor in an embodiment of an image recording apparatus according to the present invention. In the figure, 1 is a main body frame of the image recording apparatus, 2 is a side plate, and 3 is a motor unit. The motor unit 3 fixes a screw 5 passing through a base plate 4 by screwing it into a screw hole 6 of the side plate 2. The motor 7 itself is housed in the opening 8 of the side plate 2. The screw 5 is attached through a metal collar 9 and a rubber bush 10. In the figure, reference numeral 11 denotes a timing belt which is wound around a pulley 12 attached to an output shaft of the motor 7. Reference numeral 13 denotes a motor board.

FIG. 2 is a sectional view showing a state in which the screw 5 is attached. A rubber bush 10 is attached to the hole 6 of the side plate 2,
Insert the collar 9 into the hole of the rubber bush 10
The screw 5 is passed through the hole of the motor unit 3 and screwed into the female screw hole of the base plate 4 of the motor unit 3 inside the side plate 2 (the right side in the figure is inside the main body frame 1).

For this reason, the motor 7 is not fixed to the side plate 2, but is attached to the side plate 2 so as to float from the side plate 2 via the rubber bush 10. For this reason, the vibration generated from the motor 7 itself is not transmitted to the side plate 2, and the deterioration of the image quality is prevented.

In order to establish electrical continuity between the motor 7 and the side plate 2, as shown by an imaginary line in FIG. 2, a ground wire 14 is extended from the motor substrate 13 and attached to the side plate 2 with a screw 15. In order to enhance conduction, the metal plate spring 16 may be attached to the side plate 2 with a screw 17 so as to contact the motor housing or the base plate 4.

In the present embodiment, the rubber bush 10 is made of conductive rubber, and the rubber bush 10 and the side plate 2 are brought into direct contact with each other so as to conduct electricity.
The electrical continuity state is maintained. This eliminates the need for ground wires and leaf springs.

FIG. 3 is an exploded perspective view showing a mounting structure of a hard disk drive in another embodiment of the image recording apparatus according to the present invention. In this embodiment, the hard disk drive 20 is attached to the hard disk bracket 21 by the same conductive rubber bush 10, metal collar 9 and screw 5 as in the previous embodiment, and the hard disk bracket 21 is fixed to the main body frame 1. It has become. The screw 5 passes through the terminal fitting 23 at the tip of the ground wire 22, passes through the hard disk bracket 21, and is screwed into the hard disk drive 20.
Also in the present embodiment, the hard disk bracket 21
Is mounted in a state of being floated from the main frame 1, and electrical continuity between the hard disk 20 and the main frame 1 can be secured, so that a metal leaf spring or the like is not required.

[0018]

As described above, according to the image recording apparatus of the present invention, the vibration from the component serving as the vibration source is prevented from being transmitted to the main body frame by the rubber bush made of conductive rubber. Since it is floated and fixed, it is possible to obtain electrical continuity while interrupting vibration between the component parts that are attached objects and the main body frame,
Driving motors such as drum motors and paper feed motors, hard disks, drives, and storage devices such as CD-R / RWs do not need to be connected to ground wires or to secure conduction by metal leaf springs. This has the effect of simplifying the assembling work.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view showing a mounting structure of a drive motor in an embodiment of an image recording apparatus according to the present invention.

FIG. 2 is a cross-sectional view showing a mounting state of a screw of the embodiment of FIG. 1;

FIG. 3 is an exploded perspective view showing a mounting structure of a hard disk drive in another embodiment of the image recording apparatus according to the present invention.

[Explanation of symbols]

 Reference Signs List 1 Body frame of image recording apparatus 2 Side plate 3 Motor unit 4 Base plate 5 Screw 6 Side plate screw hole 7 Motor 8 Side plate opening 9 Collar 10 Rubber bush 11 Timing belt 12 Pulley 13 Motor board 14 Ground wire 15 Screw 16 Metal Leaf spring 17 Screw 20 Hard disk drive 21 Hard disk bracket 22 Ground wire 23 Terminal fitting

Claims (3)

[Claims] 1. An image recording apparatus comprising: a component which floats from a body frame and is fixed so that vibration from a component serving as a vibration source is not transmitted to the body frame;
An image recording apparatus, wherein a fixing member for fixing the component to the main body is attached to the main body frame via a rubber bush, and the rubber bush has conductivity. 2. The image recording apparatus according to claim 1, wherein said constituent parts are drive motors such as a drum motor and a sheet feeding / conveying motor. 3. The image recording apparatus according to claim 1, wherein the component is a storage device such as a hard disk drive or a CD-R / RW.