WO2007088654A1

WO2007088654A1 - Structure for supporting disc transfer roller

Info

Publication number: WO2007088654A1
Application number: PCT/JP2006/318513
Authority: WO
Inventors: Yuichiro Suzui
Original assignee: Mitsubishi Electric Corporation
Priority date: 2006-01-31
Filing date: 2006-09-19
Publication date: 2007-08-09
Also published as: JP2009093685A

Abstract

A bearing member (4), which permits a base member (3) to rotatably support a disc transfer roller (5), is provided with a snap-fit section (4b), which can be flexibly deformed in a radius direction through a slit (4a) in an axial direction and is split into fork. The snap-fit section (4b) is inserted into a roller attaching hole (3a) of a base member (3) from a thrust direction, and a roller axis (5a) of a disc transfer roller (5) is rotatably inserted into the bearing member (4) after insertion. Thus, flexure of a snap-fit section (4b) is regulated by the roller axis (5a), and the bearing member (4) is assembled and fixed in the roller attaching hole (3a).

Description

Specification

Support structure for disk transport roller

Technical field

[0001] The present invention relates to a support structure for a disk transport roller for transporting an information recording disk in a reproduction or discharge direction, for example, in an in-vehicle disk device.

Background art

[0002] Generally, this type of disk transport roller is a force that allows the base member to support itself by rotation through the bearing member. In this case, the mounting operation can be simplified by attaching the bearing member to the base member with a snap fit. It is conceivable to use a support structure for the disc transport roller as shown. In the field of image forming apparatuses such as printers and copiers, for example, as a conventional technique similar to the support structure of such a disk transport roller, a bush inserted into the end of the rotary shaft of the transfer roller is undercut and substantially U After pressing the undercut part force in the radial direction against the bearing formed in a letter shape, the bearing is inserted into the U-shaped bearing guide integrated with the base member (main body frame) via a compression spring. A transfer roller support structure configured so as to ensure maintenance of the transfer roller by loosely holding the transfer roller is already known (see, for example, Patent Document 1).

[0003] As another conventional technique, a snap-fit portion extending in the axial direction is integrally formed on a drive gear for rotationally driving a roller shaft for discharging a sheet material in an image forming apparatus. By passing through the through hole (gear mounting hole) of the frame, the drive gear is supported by the main body frame by the snap fit portion, and then the end of the roller shaft is attached to the center fitting portion of the drive gear. The snap-fit portion is connected to the through-hole by an axial rib provided on the outer periphery of the end portion of the roller shaft or a tilting restricting portion that acts as a cylindrical portion. There is also known a drive gear mounting structure that also serves as a support for a roller shaft that is configured to restrict its inward radial fall (see, for example, Patent Document 2).

[0004] Patent Document 1: Japanese Unexamined Patent Publication No. 2000-250333 ([0012 G [0015], FIG. 2)

Patent Document 2: JP 2000-72279 A ([0020] to [0026], FIG. 2 and FIG. 3) [0005] Since the transfer roller support structure in the image forming apparatus of Patent Document 1 is configured as described above, when it is applied to support the disk transport roller in an in-vehicle disk device, the disk transport Since the roller shaft of the roller is freely loosely fitted and held on the bearing guide of the main body frame via the bush, bearing and compression spring, the disk transport roller swings due to vibration during vehicle travel. Not only can the disc be transported stably, but also the undercut force is applied to the undercut substantially U-shaped bearing. The roller shaft of the disc transport roller is fitted in the radial direction, and the bearing is then fitted to the substantially U-shaped shaft. The disc is pushed into the receiving guide via a compression spring, so that the disc is inserted into the disc transport roller with an excessive force from the opposite direction, or the disc is inserted. If an unexpected load such as a card is inserted on the disc transport roller other than the guide, the bearing is removed from the bearing guide, or the disc transport roller is removed from the bearing. There was a problem of causing inoperability due to detachment.

[0006] Further, in the drive gear mounting structure disclosed in Patent Document 2, which also serves as support for the roller shaft, the roller shaft is fitted to the center fitting portion of the drive gear so that both are rotated together. Therefore, the roller shaft is not configured to be rotatably supported on the main body frame by the bearing member, and a snap fit portion for rotatably mounting the drive gear to the gear mounting hole of the main body frame is provided on the drive gear. The snap fitting portion is provided on the outer periphery of the end of the roller shaft fitted to the center fitting portion of the drive gear to prevent the snap fit portion from coming off the gear mounting hole force. The drive gear, the snap fit portion, and the roller shaft rotate in a body, so that the snap fit portion is in sliding contact with the inner peripheral surface of the gear mounting hole during rotation. Therefore, the drive gear and roller shaft rotation accuracy is likely to be impaired, and the drive gear having the snap-fit portion integrated as described above has a complicated structure. There is a problem that it cannot be applied to the support of the disk transport porter in the in-vehicle disk device, because accuracy is required and the cost is high.

[0007] The present invention has been made to solve the above-described problems, and the disk has an excessive force from different directions with respect to the disk transport roller rotatably supported by the base member via the bearing member. Inserted or a foreign object other than a disc is inserted. The purpose is to obtain a support structure for the disk transport roller without causing the bearing member to come off the base member even when an unexpected load S is applied to the disk transport roller. Disclosure of the invention

[0008] The support structure of the disk transport roller according to the present invention is the support structure of the disk transport roller in which the disk transport roller is rotatably supported through the bearing member in the roller mounting hole of the base member. Is bifurcated into a bifurcatable shape that can be deformed by being squeezed in a radial direction through a slit provided along the direction, and inserted into the roller mounting hole from the thrust direction. By having a snap-fit portion that slides into contact and deforms inwardly in the diameter of the hole, the roller shaft of the disk transport roller is rotatably inserted into the bearing member inserted into the roller mounting hole. The bearing member is assembled and fixed to the roller mounting hole by restricting the deformation of the snap fit portion with a roller shaft.

[0009] According to the present invention, after inserting the snap fit portion of the bearing member into the roller mounting hole of the base member from the thrust direction while bending it, the roller shaft of the disc transport port roller is rotatably inserted into the bearing member. As a result, the sag of the snap foot portion is regulated by the roller shaft, so that the bearing member can be securely fixed and held between the inner periphery of the roller mounting hole and the roller shaft. For this reason, when the disc is inserted into the disc transport roller with excessive force from a different direction or foreign matter other than the disc is inserted, an unexpected load force S is applied to the disc transport roller. However, there is an effect that the bearing member does not come off the base member! In addition, as described above, the bearing member is attached to the base member by inserting the snap fit portion of the bearing member into the roller attachment hole of the base member in the thrust direction and attaching the bearing member to the base member. This has the effect of reducing the thickness of the device and making the device thinner.

Brief Description of Drawings

FIG. 1 is a perspective view showing an outline of a disc reproducing apparatus having a disc transport roller support structure according to Embodiment 1 of the present invention.

[Fig. 2] Fig. 2 (a) shows the bearing member insertion in the disc transport roller support structure in Fig. 1. FIG. 2 (b) is a front view showing a mounting state of the disk transport roller by the bearing member of FIG. 2 (a).

BEST MODE FOR CARRYING OUT THE INVENTION

Hereinafter, in order to describe the present invention in more detail, the best mode for carrying out the present invention will be described with reference to the accompanying drawings.

Embodiment 1.

1 is a perspective view showing an outline of a disk reproducing apparatus having a disk transport roller support structure according to Embodiment 1 of the present invention, and FIG. 2 (a) is an illustration of a bearing member inserted in the disk transport roller support structure in FIG. FIG. 2 (b) is a front view showing a mounting state of the disk transport roller by the bearing member of FIG. 2 (a).

The disc playback apparatus shown in FIG. 1 includes a device casing 1 having a disc playback mechanism and a disc slot outlet (not shown) on the front surface, and a disk disposed inside the front side of the device casing 1. A transport roller unit 2 and a top plate (not shown) for covering the upper surface of the apparatus housing 1 are provided.

[0012] The roller unit 2 includes a base roller (base member) 3 urged by a panel member (not shown) in a direction in which a downward force is pressed against the disc D in which the disc evacuation roller is also inserted. The base roller 3 includes a disk transport roller 5 that is rotatably supported via a bearing member 4. In more detail, as shown in FIG. 2 (a), the bearing member 4 is inserted into the roller mounting hole 3a provided in the base roller 3 in a thrust direction force insertion!

[0013] The bearing member 4 is a bifurcated bifurcated shape that can be deformed in a radial direction through a slit 4a provided along the axial direction, and is inserted into the roller mounting hole 3a from the thrust direction. A fitting portion 4b is provided, and a circumferential engagement groove 4c is formed on the outer periphery of the snap fitting portion 4b. The circumferential engagement groove 4c is divided by the slit 4a to be fitted to the hole edge of the roller mounting hole 3a. In addition, a tapered surface 4d for facilitating insertion of the snap fit portion 4b into the roller mounting hole 3a is formed at the tip of the snap fit portion 4b. Further, rotation preventing portions 3b and 4e of the bearing member 4 are provided on the inner peripheral surface of the roller mounting hole 3a and the outer peripheral surface of the bearing member 4. Next, the assembly of the disc transport roller 5 to the base roller 3 by the bearing member 4 will be described. When assembling, the force that inserts the thrust force 4b of the bearing member 4 into the roller mounting hole 3a of the base roller 3 in the thrust direction as well, the tapered surface 4d at the tip of the snap fit portion 4b is attached to the roller at the time of the insertion. The snap fit portion 4b is pushed into the hole diameter of the roller mounting hole 3a by sliding in contact with the hole edge portion of the hole 3a, and the snap fit portion 4b is inserted into the hole edge portion of the roller mounting hole 3a. The outer engaging groove 4c is fitted and engaged. After the snap fit portion 4b of the bearing member 4 is inserted into and engaged with the roller mounting hole 3a in this way, the roller shaft 5a of the disc transport roller 5 is rotatably inserted into the center hole portion of the bearing member 4. Thus, the sag of the snap fit portion 4b is regulated by the roller shaft 5a. A gear (not shown) is fitted to the end of the roller shaft 5a, and the disk transport roller 5 is rotationally driven by a motor (not shown) via this gear. /!

Next, the operation will be described.

When the disk D is inserted from the disk housing outlet 1 of the device housing 1, the motor is activated and the disk transport roller 5 is driven to rotate, so that the disk D is transported from the top plate of the device housing 1 and the disk transport. In the state of being sandwiched between the rollers 5, the disc transport rollers 5 are transported into the apparatus housing 1 by the rotation.

[0016] According to the first embodiment described above, the bearing member 4 that rotatably supports the disc transport roller 5 on the base roller 3 can be deformed by being squeezed in the radial direction via the axial slit 4a. The snap-fit portion 4b is formed to have a bifurcated snap-fit portion 4b, and the snap-fit portion 4b is inserted into the roller mounting hole 3a of the base roller 3 in the thrust direction so that the outer periphery of the snap-fit portion 4b is engaged. After the mating groove 4c is fitted into and engaged with the hole edge of the roller mounting hole 3a, the roller shaft 5a of the disk transport port roller 5 is rotatably passed through the center hole of the bearing member 4 and the roller shaft. Since the sag of the snap fit portion 4b is controlled by 5a, the bearing member 4 is securely and firmly fixed between the inner periphery of the roller mounting hole 3a and the roller shaft 5a. For this reason, the disc D is inserted into the disc transport roller 5 with an excessive force from a different direction, or foreign matter other than the disc is inserted into the disc transport roller 5. The bearing member 4 does not come off the base roller 3 even when the load force is applied.

Further, as described above, the configuration is such that the snap fit portion 4b of the bearing member 4 is inserted into the roller mounting hole 3a of the base roller 3 also in the thrust direction and the bearing member 4 is attached to the base roller 3. As a result, the thickness of the bearing member mounting portion of the base roller 3 can be reduced, and the apparatus can be thinned. Further, by providing rotation preventing portions 3b and 4e on the inner peripheral surface of the roller mounting hole 3a and the outer periphery of the bearing member 4, the bearing member 4 can be prevented from rotating together with the roller shaft 5a. If the inconvenience due to the co-rotation can be eliminated, there is an effect.

[0018] It should be noted that the roller mounting hole 3a of the base roller 3 may be either a round hole or a notch hole as shown in FIG. By configuring the snap fit portion 4b so that the snap fit portion 4b can only be inserted in the thrust direction and cannot be inserted, the same effect as in the first embodiment can be obtained.

Industrial applicability

[0019] The present invention can be widely applied to apparatuses including a roller support structure that is rotatable on a base member via a bearing member. It is particularly suitable for in-vehicle disk playback devices.

Claims

The scope of the claims

The support structure of the disk transport roller that supports the disk transport roller in the roller mounting hole of the base member through the bearing member to rotate itself,

The bearing member is provided along the axial direction, can be deformed by being squeezed in the radial direction, and has a snap foot portion that is slidably in contact with the edge of the roller mounting hole and squeezed and deformed inwardly of the hole diameter. It is composed,

By inserting the roller shaft of the disk transport roller into the bearing member inserted in the roller mounting hole so as to be rotatable, the roller shaft restricts the deformation of the snap-fit portion with the roller shaft and inserts the roller shaft into the roller mounting hole. A disc transport roller support structure characterized by the assembly and fixing of bearing members.