JP4255623B2 - Cable support structure and image forming apparatus - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a cable support structure and an image forming apparatus, and more particularly to a structure for holding a flat cable which is one type of harness.
[0002]
[Prior art]
In an apparatus using various electrical components such as an image forming apparatus such as a copying machine, a facsimile, a printer, or a printing machine, a harness is used to connect the electrical components.
The harness is a lead wire whose core wire is covered with a so-called insulating resin, and may be used as a single wire, but is often used collectively depending on the structure of the wiring portion.
When harnesses are used together, they may be flat cables that are arranged side by side so that the installation space is smaller than when bundled.
[0003]
A flat cable is hold | maintained using a vinyl band etc. with respect to stationary parts, such as a housing | casing surface located between the connectors of electrical components.
[0004]
[Problems to be solved by the invention]
Since the vinyl band is mainly used for bundling single lead wires, it is not suitable for holding a flat cable that is flat by being put together. Therefore, as shown in FIG. 4, it is also possible to use a clamp member A provided with a surface A1 on which a flat cable can be placed and a flexible piece A2 whose base is integrated and swingable.
[0005]
However, although the clamp member A shown in FIG. 4 is a general-purpose product, it is often expensive because it is a special part. For this reason, in actual wiring work, a flat cable is attached with a double-sided tape or a seal. It is often used and affixed to the housing surface. Therefore, depending on the fixing member, an additional operation such as an operation of peeling the backing paper such as a seal is required, and the wiring workability is deteriorated.
[0006]
A flat cable may be laminated | stacked in multiple depending on the handling conditions. In this case, if the double-sided tape or the seal is used, the holding strength with respect to the housing surface cannot be obtained, and it tends to drop off.
When it is intended to hold a plurality of flat cables by the clamp member A shown in FIG. 4, the distance between the flexible piece A2 and the cable mounting surface A1 cannot be increased beyond a predetermined dimension, Since the flexible piece A2 has a cantilever shape, the possibility that the flat cable falls off from the free end remains unresolved. As a result, when performing the wiring work in the image forming apparatus, there is a problem that the cost increases and the wiring workability is poor particularly when wiring at least one layer of flat cable. As a result, an image forming apparatus with high cost may be obtained.
[0007]
A flat cable generates and retains electromagnetic waves due to the current flowing through the core wire. Although the strength of the electromagnetic wave depends on the current that flows, it may affect electronic components arranged near the support position of the flat cable, so countermeasures are required.
[0008]
In view of the problems in the conventional cable support structure, particularly the flat cable support structure, the object of the present invention is to hold the flat cable reliably regardless of the wiring situation such as the flat cable lamination state without causing an increase in cost. Another object of the present invention is to provide a cable support structure and an image forming apparatus having a configuration that does not affect the influence of electromagnetic waves generated from a flat cable on other electronic components.
[0009]
[Means for Solving the Problems]
The invention according to claim 1 is a cable support structure for holding a cable in a housing,
A support hole composed of a through hole formed in the housing part;
Is formed of a plate material having a surface facing the housing part, Nde write enters the support hole includes a bent piece shaped to partially can be placed with the inner edge of the support hole, the position that has entered to the support hole And a mounting member that can swing in a direction in which the swing end side comes into contact with and separates from the housing with the fulcrum as a fulcrum. and space can constitute a recess for accommodating the cable, and the locking projection is provided with oscillating end side of the attachment member is formed in a part of the locking hole provided in locations adjacent said mounting member The bent portion is bent at a right angle with respect to the surface facing the recess of the housing, and is bent at an acute angle with respect to the base and not parallel to the surface facing the recess. With the bent piece as a fulcrum. A locking piece that can be engaged with a locking projection of the housing portion is provided on the swing end side when swinging in a direction approaching the concave portion of the housing portion, and is provided in the support hole of the housing portion. When the bent piece of the attachment member is inserted, the bent end of the attachment member is brought close to the concave portion of the housing portion so that the engagement piece engages with the engagement protrusion. The mounting member is maintained by maintaining the state where the swinging end side of the mounting member is locked against the repulsive force generated when the tip of the piece is pressed against the inner surface of the housing portion due to its inclination. It is hard to come off from the support hole, and the state where the cable is positioned in the recess is maintained in this state .
[0011]
According to a second aspect of the present invention, the locking projection is formed by cutting and raising a part of the locking hole, and the locking piece of the mounting member is constituted by a cut and raised piece, and a part thereof includes the above A fitting hole that can be fitted to the locking projection is formed, and the fitting hole is fitted to the locking projection, so that the folding member is bent when the mounting member approaches the recess of the housing portion. It is characterized in that the state in which the swinging end side of the attachment member is locked is maintained against the repulsive force generated when the tip of the piece comes into pressure contact with the inner surface of the housing portion due to the inclination thereof .
[0015]
The invention described in claim 3 is characterized in that the cable support structure described in claim 1 or 2 is used.
[0016]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the illustrated examples.
[0017]
FIG. 1 is a perspective view of a partial housing portion showing a cable support structure according to an embodiment of the present invention.
In FIG. 1, the cable support structure according to the present embodiment is intended for a flat cable C in which a plurality of harnesses are arranged in parallel, and is opposed to the recesses 1 </ b> A and 1 </ b> A formed in the housing 1. The main part is comprised with the mounting member 2 arrange | positioned. Hereinafter, each part will be described.
In this embodiment, the casing 1 is a casing of an image forming apparatus such as a copying machine, a printer, a facsimile machine, and a printing machine, and a wall surface of the casing 1 can be connected to electrical components (not shown). A pair of support holes 3 are provided along the cable wiring direction (direction indicated by arrow F). Thereby, it can prevent effectively that the flat cable C which is a support object falls down in a wiring direction.
[0018]
As shown in FIG. 1B, a recess 1 </ b> A that bulges on the opposite side to the surface facing the mounting member 2, which will be described later, is formed at a location where the support hole 3 is formed in the housing 1. . The concave portion 1A is a portion that constitutes a space that accommodates the flat cable C facing the mounting member 2 described later.
[0019]
The attachment member 2 is a plate made of a conductive material, and in this embodiment, a metal plate capable of sheet metal processing is used.
The attachment member 2 has a bent piece 2A that can enter the support hole 3, and a hole 2B that forms a fastening portion provided on the edge opposite to the edge on which the bent piece 2A is provided. Is provided.
The bent piece 2A has a shape in which a part of the bent surface can be placed on the inner edge of the support hole 3, and is bent into an angle shape in this embodiment.
When the bent piece 2 </ b> A enters the support hole 3, a part of the bent piece 2 </ b> A is placed on the inner edge of the support hole 3, so that the attachment member 2 is attached to the housing unit 1 as shown in FIG. A swing fulcrum that can be moved toward and away from each other is configured.
[0020]
In FIG. 1B, the bent piece 2A is formed in an angle shape (L-shape), but each L-shape piece is not a right angle.
The base of the bent piece 2A (indicated by reference numeral 2A1 in FIG. 1B for convenience) is a surface of the mounting member 2 that faces the recess 1A on the housing 1 side (indicated by reference numeral 2C in FIG. 1B for convenience). ) And a distal end portion (indicated by reference numeral 2A2 in FIG. 1B for convenience) that is bent at a right angle with respect to the base portion 2A is an acute angle with respect to the base portion 2A1 (see FIG. 1B). The angle is indicated by the symbol θ in FIG. For this reason, the tip 2A2 of the bent piece 2A is not parallel to the surface 2B of the mounting member 2 that faces the recess 1A of the housing 1.
[0021]
When the base 2A1 and the tip 2A2 of the bent piece 2A are at an acute angle, when the tip 2A2 comes into contact with the inner surface of the support hole 3, the tip 2A2 is elastically repelled when the mounting member 2 is swung. Occurs. For this reason, the bent piece 2 </ b> A is pressed against the inner side surface of the support hole 3 to be hard to come off, and when the fastening part is fastened to the housing part 1, the bent piece 2 </ b> A is not inadvertently detached from the support hole 3.
[0022]
In the present embodiment, there is a configuration in which it is possible to eliminate the difficulty of fastening due to elastic repulsion when the mounting member 2 swings in the direction of approaching the housing 1 due to the bent state of the distal end portion 2A2 of the bent piece 2A. It has been. This configuration includes a locking hole 4 provided in the casing 1 and a locking piece 2D provided in the attachment member 2.
In FIG. 1, the housing portion 1 is provided with a locking hole 4 at a location where the swinging end of the mounting member 2 is close. The locking hole 4 is provided with a locking projection 4 </ b> A that is partially cut and raised, and this locking projection 4 </ b> A can be engaged with the mounting member 2 side.
[0023]
The attachment member 2 is provided with a pair of locking pieces 2D along the wiring direction of the flat cable C in the vicinity of the fastening portion 2B. The locking piece 2D is constituted by a cut and raised piece, and a fitting hole 2D1 penetrating in the thickness direction is provided in a part of the locking piece 2D. The locking projection 4A can be fitted into the fitting hole 2D1.
[0024]
Since the present embodiment is configured as described above, as shown in FIG. 1 (B), when the mounting member 2 swings in the direction approaching the housing portion 2 with the bent piece 2A as a fulcrum, the mounting member 2 Since the fitting hole 2D1 located in the locking piece 2D on the side faces the locking protrusion 4A on the housing 1 side, the locking protrusion 4A can be fitted into the fitting hole 2D1. Thereby, even if the fastening portion 2B of the attachment member 2 is not yet fastened, the swinging end side of the attachment member 2 is locked against the elastic repulsion force at the tip portion 2A2 of the bent piece 2A, that is, The mounting member 2 is temporarily fixed, and the flat cable C located in the recess 1A can be sandwiched and supported. In addition, since the flat cable C can be supported while being positioned in the recess 1A, there is no inadvertent pressing by the fastening action of the mounting member 2 against the flat cable C, and the flat cable C can be damaged. Absent.
[0025]
The attachment member 2 that can hold the flat cable C located in the recess 1A regardless of the elastic repulsion force at the bent piece 2A shields the flat cable C when fastened. Therefore, electromagnetic waves generated from the flat cable C can be shielded. Since the attachment member 2 can constitute a part of the ground circuit of the housing unit 1 via a fastening member or the like, it is possible to prevent the influence of electromagnetic waves from the flat cable C on nearby electronic components. it can.
[0026]
Next, a modification according to the embodiment of the present invention will be described. In the members described below, the same constituent members as those shown in FIG.
FIG. 2 shows a modified example of the attachment member (indicated by reference numeral 2 ′ for convenience). In FIG. 2, the attachment member 2 ′ includes the fall prevention portion 2E of the flat cable C between the bent pieces 2A. Is provided.
In this configuration, as shown in FIG. 3, the case where a plurality of flat cables C are supported is a target. That is, as shown in FIG. 3A, when it is desired to support a plurality of flat cables C at the same location, the bent piece 2A of the mounting member 2 'is inserted into the support hole 3, and the flat cable C is attached at this stage. The concave portion 1A or the attachment member 2 ′ is positioned on the fall prevention portion 2E. In the process of swinging the attachment member 2 ′, the flat cable C is prevented from dropping from the attachment member 2 ′ by the fall prevention portion 2E.
[0027]
1C and 3C show a state in which the attachment members 2 and 2 ′ in the state shown in FIGS. 1A and 3A are swung toward the paper surface side. In this state, since the locking projection 4A and the fitting hole 2D1 are fitted, the fastening operation for the fastening portion 2B can be performed without requiring any holding operation of the mounting members 2 and 2 ′.
[0028]
【The invention's effect】
According to the first aspect of the present invention, the bent piece formed on one of the edges of the attachment member is fitted into the support hole of the housing portion, and the bent piece is pressed against the inner surface of the housing portion having the support hole. It is possible to make the attachment member close to the housing portion by swinging the attachment member while supporting the cable loaded in the concave portion of the housing portion before fastening. The cable can be held by simply loading the cable between the casing portion and the surface facing the casing, and can be supported in a state where the cable is sandwiched before fastening. As a result, it is possible to prevent damage to the cable due to an inadvertent external force that occurs when fastening while supporting the cable. In particular, the mounting member is made of a plate material and has a simple configuration that is simply sandwiched in a state where the cable is covered together with the casing portion, so that it can have a simple shape that can prevent dropping and prevent an increase in cost. Can do.
In addition, a recess that bulges on the opposite side to the side facing the mounting member is provided at the location where the support hole is formed in the housing, and a cable can be loaded in this recess. The cable does not receive an inadvertent pressing external force by the mounting member even when it swings in the direction close to the cable. As a result, the cable can be supported without damaging the cable.
[0030]
According to the second aspect of the present invention, the mounting member is provided with a locking hole which is provided separately from the support hole at the end opposite to the end where the bent piece is provided and has a locking projection in part. Since a locking piece that can be fitted is provided, when the mounting member is swung toward the housing with the bent piece as a fulcrum, the locking piece is used as a locking projection in the locking hole before fastening. A simple temporarily fixed state can be obtained simply by fitting. As a result, when the cable is swung toward the housing with the cable loaded between the housing and the housing, the attachment member can be prevented from inadvertently dropping off from the housing. The cable can be held.
[0034]
According to the third aspect of the present invention, it is possible to obtain an attachment member that is a support member for a cable, particularly a flat cable, without causing an increase in cost, and is disposed in the vicinity of the flat cable support position in the apparatus. Since the influence of electromagnetic waves on the electronic components can be almost eliminated, it is possible to prevent malfunction of the apparatus.
[Brief description of the drawings]
FIG. 1 is a perspective view showing a cable support structure for explaining an example according to an embodiment of the present invention.
FIG. 2 is a perspective view showing a modified example of the attachment member used in the support structure shown in FIG.
FIG. 3 is a perspective view showing a cable support structure using the attachment member shown in FIG. 2;
FIG. 4 is a side view showing an example of a part used in a cable support structure.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Housing | casing part 1A Recessed part 2 Attachment member 2A Bending piece 2B Hole 2D which is a fastening part Locking piece 2D1 Fitting hole 3 Supporting hole 4 Locking hole 4A Locking protrusion C Flat cable

Claims (3)

A cable support structure for holding a cable in a housing,
A support hole composed of a through hole formed in the housing part;
Nde write is formed of a plate material having a surface facing the housing unit enters the support hole has a bent piece shaped to partially can be placed with the inner edge of the support hole, entering into the support hole It consists of a mounting member that can swing in the direction in which the swing end side comes into contact with and separates from the housing with the position as a fulcrum ,
The casing portion is provided with a recess that bulges on the opposite side of the surface facing the mounting member and that can form a space for housing the cable, and a member provided at a position where the swinging end side of the mounting member is adjacent. A locking projection formed on a part of the blind hole,
The mounting member is bent at a right angle with respect to a surface facing the recess of the housing, and is bent at an acute angle with respect to the base and not parallel to the surface facing the recess. A locking protrusion of the housing portion on the swinging end side when the bending piece swings in a direction approaching the recess of the housing portion with the bending piece as a fulcrum. A locking piece that can be engaged with is provided,
With the bent piece of the mounting member entering the support hole of the housing portion, the swinging end side of the mounting member is brought close to the concave portion of the housing portion, and the locking piece becomes the locking protrusion. When engaged, a state in which the swinging end side of the mounting member is locked against the repulsive force generated when the tip of the bent piece is pressed against the inner surface of the housing portion due to its inclination. The cable support structure is characterized in that the attachment member is hardly detached from the support hole by being maintained, and the state where the cable is positioned in the recess is maintained in this state . The cable support structure according to claim 1,
The locking protrusion is formed by cutting and raising a part of the locking hole,
The locking piece of the mounting member is constituted by a cut-and-raised piece, and a fitting hole that can be fitted to the locking protrusion is formed in a part thereof,
When the fitting hole is fitted into the locking projection, the tip of the bent piece is pressed against the inner surface of the housing portion by its inclination when the mounting member approaches the concave portion of the housing portion. A cable support structure characterized in that the state where the swinging end side of the mounting member is locked is maintained against a repulsive force generated when the mounting member is pressed .   An image forming apparatus using the cable support structure according to claim 1.

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