WO2010055605A1

WO2010055605A1 - Device for protecting and fixing flat cable

Info

Publication number: WO2010055605A1
Application number: PCT/JP2009/004684
Authority: WO
Inventors: 藤田智也
Original assignee: 三菱電機株式会社
Priority date: 2008-11-14
Filing date: 2009-09-17
Publication date: 2010-05-20
Also published as: JP4879356B2; JPWO2010055605A1

Abstract

A protecting and fixing device is provided with an upper lid (1) in which an upper-lid slit (4) is formed, the upper-lid slit (4) allowing a flat cable (14) to pass therethrough; a lower lid (2) in which a lower-lid slit (6) is formed at a position shifted from a position facing the upper-lid slit (4), the lower lid slit (6) allowing the flat cable (14) to pass therethrough; a hinge section (3) for foldably connecting the upper lid (1) and the lower lid (2) together; fixing claws (5) for fixing the upper lid (1) and the lower lid (2) together; and holding claws (7) provided on that surface of the lower lid (2) which faces the upper lid (1) and engaging with the peripheral edge of a housing opening (11). The upper lid (1) and the lower lid (2) collectively sandwich, from front and rear surfaces of the peripheral edge of the housing opening (11), both the peripheral edge and the flat cable (14) passed through the upper-lid slit (4), the housing opening (11), and the lower-lid slit (6). In this way, the flat cable (14) is inserted and fixed to the housing opening (11).

Description

Flat cable protective fixture

The present invention relates to a protective fixture for fixing a flat cable attached to an opening of a housing or the like while being pulled into the housing or the like.

Conventionally, in order to prevent the cable from being damaged or disconnected by the edge of the opening in the structure in which the cable is pulled in or pulled out from the opening provided in the housing, conventionally, the edge has been subjected to scratches such as beveling or bending. It was necessary to apply anti-stick processing or cover the edge with a separate part.

Furthermore, it was necessary to attach a resin lid for closing the opening for the purpose of preventing entry of foreign matter from the opening of the housing and improving the design. For example, Patent Document 1 proposes a resin component in which an opening through which a cable bundle is inserted is provided at the center of a thin resin plate. The resin component is screwed so as to cover the housing opening, and a cable bundle is drawn from the opening to prevent foreign matter from entering the housing.

JP 2005-32954 A

Since the conventional cable lead-in structure is configured as described above, edge damage prevention processing leads to a complicated mold structure and an increase in the number of work processes, which increases the cost for manufacturing the mold and increases the work cost. There are problems such as cost problems such as the above, and quality problems such as secondary defects such as processing omission of damage prevention processing, insufficient processing, and generation of processing residue.
Further, when the edge of the opening is covered with a separate part, the fitting is performed from either the front or back of the opening, and thus it is difficult to completely cover the edge and protect the cable.
Furthermore, when the opening is closed with a resin component, the resin component is screwed to the housing, which leads to an increase in the number of components and contributes to an increase in cost.

The present invention has been made in order to solve the above-described problems. The flat cable has a structure for inserting and fixing the flat cable into the housing opening and a structure for preventing the flat cable from being damaged by the edge of the housing opening. The purpose is to provide ingredients.

The flat cable protective fixing device according to the present invention includes a first lid having a first slit through which the flat cable is inserted, and a flat cable at a position shifted from a position facing the first slit. A second lid having a second slit to be inserted therethrough; and a hinge portion for connecting the first lid and the second lid so that the first lid and the second lid can be bent. The lid of the cable inserts and fixes the flat cable into the housing opening by sandwiching the periphery of the housing opening from the front and back together with the flat cable inserted through the first slit, the housing opening, and the second slit. It is.

According to this invention, the first lid and the second lid sandwich the peripheral edge of the housing opening from the front and back together with the flat cable inserted through the first slit, the housing opening, and the second slit. Therefore, it is possible to provide a flat cable protective fixing device having a structure for inserting and fixing a flat cable into a housing opening and a structure for preventing damage by an edge of the housing opening.

It is a perspective view which shows the structure of the protective fixing tool which concerns on Embodiment 1 of this invention. It is a top view which shows an example of the housing | casing opening part which attaches the protection fixing tool which concerns on Embodiment 1 of this invention. It is a perspective view which shows a mode that the protective fixing tool which concerns on Embodiment 1 of this invention is attached to a housing | casing opening part. It is a perspective view which shows the state which temporarily fixed the protective fixing tool which concerns on Embodiment 1 of this invention to the housing | casing opening part. It is a perspective view which shows the state which penetrated the flat cable to the protective fixing tool which concerns on Embodiment 1 of this invention. It is a perspective view which shows the state which attached the protective fixing tool which concerns on Embodiment 1 of this invention to the housing | casing opening part. It is sectional drawing which shows the state which attached the protective fixing tool which concerns on Embodiment 1 of this invention to the housing | casing opening part, and is a cross section cut | disconnected along the AA line shown in FIG. It is a perspective view which shows the flat cable which the protection fixing tool which concerns on Embodiment 1 of this invention fixes. It is sectional drawing which shows the state which attached the protective fixing tool which concerns on Embodiment 2 of this invention to the housing | casing opening part, and is a cross section cut | disconnected in the position equivalent to the AA line shown in FIG. It is a perspective view which shows the structure of the protective fixing tool which concerns on Embodiment 3 of this invention. It is sectional drawing which shows the state which attached the protective fixing tool which concerns on Embodiment 3 of this invention to the housing | casing opening part, and is a cross section cut | disconnected in the position corresponded to the BB line | wire shown in FIG. It is sectional drawing which shows the state which attached the protective fixing tool which concerns on Embodiment 4 of this invention to the housing | casing opening part, and is a cross section cut | disconnected in the position equivalent to the AA line shown in FIG.

Hereinafter, in order to explain the present invention in more detail, modes for carrying out the present invention will be described with reference to the accompanying drawings.
Embodiment 1 FIG.
1 is a perspective view showing a configuration of a protective fixture according to Embodiment 1 of the present invention. The protective fixture is a single component composed of an upper lid (first lid) 1, a lower lid (second lid) 2, and a hinge portion 3 that connects the upper lid 1 and the lower lid 2 in a foldable manner. is there. In addition, although called the upper lid and the lower lid for convenience, the protective fixture may be turned upside down.
FIG. 2 is a plan view showing an example of a housing opening 11 to which the protective fixture according to Embodiment 1 of the present invention is attached. A housing opening 11 formed in one surface of the housing 10 is a hole for attaching or removing the flat cable by attaching the protective fixture shown in FIG.

The upper lid 1 is provided with an upper lid slit (first slit) 4 for inserting a flat cable. A plurality of fixing claws 5 are provided on the surface facing the lower lid 2 of the upper lid 1. The fixing holes 5 a with which the fixing claws 5 are engaged are provided at positions where the fixing claws 5 come into contact with the fixing claws 5 of the lower lid 2. The fixing claw 5 and the fixing hole 5a constitute an uneven locking portion.
The lower lid 2 is provided with a lower lid slit (second slit) 6 for inserting a flat cable. Further, on the surface facing the upper lid 1 of the lower lid 2, a convex portion 8 that fits into the housing opening 11 is projected, and the entire circumference of the convex portion 8 is a flange 9. A plurality of holding claws 7 are provided at the edge of the convex portion 8. In the upper lid 1, holding holes 7 a for accommodating the holding claws 7 are provided at positions where the holding claws 7 of the lower lid 2 abut when the upper lid 1 and the lower lid 2 are bent.
The fixed claws 5 and the holding claws 7 have a snap fit structure. Further, the fixing claw 5 and the holding claw 7 may be provided on either the upper lid 1 or the lower lid 2.

The housing opening 11 shown in FIG. 2 is provided with an attachment slit 12 through which the lower lid 2 is passed when attaching the protective fixture, and a hinge slit 13 for receiving the hinge portion 3 when attached. .

FIG. 3 is a perspective view showing a state where the protective fixture according to Embodiment 1 of the present invention is attached to the housing opening 11. FIG. 4 is a perspective view showing a state where the protective fixture according to Embodiment 1 of the present invention is temporarily fixed to the housing opening 11. In FIG. 4, in order to explain a state of temporary fixing of the protective fixing tool, a portion that is hidden and cannot be seen is indicated by a dotted line.
As shown in FIG. 3, the lower lid 2 moves from the front surface side of the housing opening 11 to the back surface side through the attachment slit 12. Then, as shown in FIG. 4, when the convex portion 8 of the lower lid 2 is pushed into the housing opening 11 from the back surface of the housing 10, each holding claw at the end of the convex portion 8. 7 hangs around the periphery of the case opening 11 to temporarily fix the protective fixture to the case opening 11. The hinge portion 3 is accommodated in the hinge slit 13. When the protective fixture is temporarily fixed to the housing opening 11 in this manner, the edge surface of the housing opening 11 is covered with the convex portion 8 and the back surface side edge is covered with the flange 9 of the lower lid 2.

FIG. 5 is a perspective view showing a state in which the flat cable 14 is inserted through the protective fixture according to Embodiment 1 of the present invention. The flat cable 14 is inserted from the lower lid slit 6 of the protective fixture temporarily fixed to the housing opening 11 and pulled out from the upper lid slit 4. Alternatively, it is inserted from the upper lid slit 4 and pulled out from the lower lid slit 6.
As the flat cable 14, a flexible flat cable (FFC) or a flexible printed circuit board (FPC) is used.

FIG. 6 is a perspective view showing a state in which the protective fixture according to Embodiment 1 of the present invention is attached to the housing opening 11.
When the upper lid 1 of the protective fixing tool in the state shown in FIG. 5 is bent in the direction of the lower lid 2, the fixing claws 5 of the upper lid 1 engage with the fixing holes 5a of the lower lid 2, as shown in FIG. The upper lid 1 is fixed to the lower lid 2. At this time, the flat cable 14 is sandwiched between the upper lid 1 and the lower lid 2 and fixed to the housing 10. When the protective fixture is fixed to the housing opening 11 in this way, the surface side edge of the housing opening 11 is covered with the upper lid 1. As described above, since the edge other than the surface side is also covered, the edge of the housing opening 11 does not come into contact with the flat cable 14. Therefore, the flat cable 14 can be prevented from being damaged and disconnected by the edge of the housing opening 11.
The fixing claw 5 fixes the upper lid 1 and the lower lid 2 with the casing opening 11 and the flat cable 14 sandwiched therebetween, so that a protective fixture is attached to the casing opening 11 without using screws or the like. be able to.

In addition, after the flat cable 14 is inserted into the upper lid slit 4 and the lower lid slit 6 and until the upper lid 1 and the lower lid 2 are bent and fixed by the fixing claws 5, the upper lid slit 4 is applied to the flat cable 14 by the frictional force. Is temporarily held. For this reason, useless play of the flat cable 14 during work is suppressed, and it becomes possible to prevent damage and disconnection and to improve workability.

FIG. 7 is a cross-sectional view showing a state in which the protective fixture according to Embodiment 1 of the present invention is attached to the housing opening 11, and shows a cross section cut along the line AA in FIG. As shown in FIG. 7, the upper lid slit 4 and the lower lid slit 6 are shifted so as not to face each other so that the upper lid 1 and the lower lid 2 sandwich the flat cable 14 between the sandwiched surface and the flat cable 14. A friction force is generated. Therefore, even when an excessive load is applied to the flat cable 14, the protective fixing tool can fix the flat cable 14, and the flat cable 14 can be prevented from coming off from a connecting instrument such as a connector.

FIG. 8 is a perspective view showing the flat cable 14a fixed by the protective fixture according to Embodiment 1 of the present invention. Instead of the flat cable 14, a flat cable 14a shown in FIG. 8 may be inserted through the protective fixture.
The flat cable 14a is provided with an ear shape, and a flat cable hole 15 is formed there. By inserting the flat cable hole 15 into the fixed claw 5 of the upper lid 1, the fixed claw 5 can temporarily hold the flat cable 14 a. For this reason, useless play of the flat cable 14a in the middle of work is suppressed, and it becomes possible to prevent damage and disconnection and to improve workability.
Further, by holding the flat cable 14a between the upper lid 1 and the lower lid 2 while the flat cable hole 15 is inserted into the fixing claw 5, the protective fixture can more firmly fix the flat cable 14a.
In addition, you may make a hole directly in the flat cable 14a, without providing an ear shape. Further, the fixing claw 5 may not be used as the holding portion of the flat cable 14a, and the holding portion may be provided at an arbitrary position of the upper lid 1 or the lower lid 2.

In the above description, as a procedure for attaching the protective fixture and the flat cable 14 to the housing opening 11, first, the protective fixture is temporarily fixed to the housing opening 11 by the holding claws 7, and the flat cable 14 is secured and fixed. The procedure for fixing after inserting the tool was shown. However, the mounting procedure is not limited to this, and the flat cable 14 is first inserted into the protective fixture and temporarily held in the upper lid slit 4, and the protective fixture integrated with the flat cable 14 is attached to the housing. The procedure of fixing to the opening 11 may be used.

As described above, according to the first embodiment, the protective lid that is attached to the housing opening 11 and inserts and fixes the flat cable 14 into the housing 10 is formed in the upper lid slit 4 through which the flat cable 14 is inserted. The lower lid 2 having a lower lid slit 6 through which the flat cable 14 is inserted, and the upper lid 1 and the lower lid 2 can be bent. A hinge portion 3 that is connected to the upper lid 1, a fixing claw 5 that fixes the upper lid 1 and the lower lid 2, and a holding claw 7 that is engaged with the periphery of the housing opening 11 on the surface facing the upper lid 1 of the lower lid 2. It was configured to provide.
For this reason, the protective fixture can sandwich the entire circumference of the housing opening 11 together with the flat cable 14 from the front and back, so that the edge of the housing opening 11 is not exposed at all. Furthermore, since the flat cable 14 is routed in the protective fixture, the flat cable 14 can be prevented from being damaged and disconnected.

Further, since the sandwiching surface of the flat cable 14 is provided by shifting the drilling positions of the upper lid slit 4 and the lower lid slit 6, a frictional force is generated between the sandwiching surface and the flat cable 14 so that the flat cable 14 is It can be inserted and fixed in the body opening 11. Moreover, the flat cable hole 15 can be drilled in the flat cable 14, and the flat cable hole 15 can be inserted and held in the fixing claw 5. For these reasons, even when an excessive load is applied to the flat cable 14, it is possible to prevent a load from being applied directly to the connection destination connector from the flat cable 14, and to prevent the connector from coming off from the connector.

In addition, the upper and

lower lids

1 and 2 are fixed in a state where the fixing claw 5 sandwiches the housing opening 11, and the holding claw 7 is hooked on the periphery of the housing opening 11, so that a screw or the like is required. Instead, the protective fixture alone can be attached to the housing opening 11.

Embodiment 2. FIG.
FIG. 9 is a cross-sectional view showing a state where the protective fixture according to Embodiment 2 of the present invention is attached to the housing opening 11, and the protective fixture is cut at a position corresponding to the line AA shown in FIG. This is a cross section. In the protective fixture of the present embodiment, the convex rib portion 21 protrudes from the upper lid 1 of the protective fixture shown in the first embodiment, and the groove portion 22 is formed at the position of the lower lid 2 facing the convex rib portion 21. It is recessed. Since other configurations are the same as those of the first embodiment, description thereof is omitted.
The groove portion 22 may be recessed in the upper lid 1 and the convex rib portion 21 may protrude from the lower lid 2.

When the protective fixing portion is attached to the housing opening 11 together with the flat cable 14, the upper lid 1 and the lower lid 2 sandwich the flat cable 14 to apply a frictional force to the flat cable 14, but the convex rib portion 21 and the groove portion 22 are flat. By holding the cable 14, a frictional force can be further applied to the flat cable 14. As a result, even when an excessive load is applied to the flat cable 14, the protective fixing tool can more firmly fix the flat cable 14, and the flat cable 14 can be prevented from coming off from a connecting device such as a connector. It becomes.

As described above, according to the second embodiment, the upper rib 1 includes the convex rib portion 21 projecting from the upper lid 1 and the groove portion 22 recessed at a position facing the convex rib portion 21 of the lower lid 2. When the lower lid 2 sandwiches the peripheral edge of the housing opening 11 together with the flat cable 14 from the front and back, the convex rib portion 21 and the groove portion 22 sandwich and hold the flat cable 14. Therefore, the protective fixture can insert and fix the flat cable 14 to the housing opening 11 more firmly.

Embodiment 3 FIG.
FIG. 10 is a perspective view showing the configuration of the protective fixture according to Embodiment 3 of the present invention. The protective fixture of the present embodiment is provided with ribs 31 at both ends of the upper lid 1 of the protective fixture shown in the first embodiment. Since other configurations are the same as those of the first embodiment, description thereof is omitted.

FIG. 11 is a cross-sectional view showing a state where the protective fixture according to Embodiment 3 of the present invention is attached to the housing opening 11, and the protective fixture is cut at a position corresponding to the line BB shown in FIG. This is a cross section. Since the upper lid 1 is pulled toward the housing opening 11 by the fixing claws 5, the upper lid 1 is elastically deformed by the ribs 31. Therefore, tension is generated between the upper lid 1 and the housing opening 11 to prevent the protective fixture from rattling, and rattle noise can be prevented from being generated.
Note that the rib 31 may be provided not on the upper lid 1 but on the lower lid 2, and may be a boss shape instead of a rib shape.

As described above, according to the third embodiment, the rib 31 is provided so as to protrude from the surface facing the lower lid 2 of the upper lid 1. Therefore, by applying a tension with the housing opening 11 to the upper lid 1, it is possible to prevent the generation of rattle noise.

Embodiment 4 FIG.
FIG. 12 is a cross-sectional view showing a state where the protective fixture according to Embodiment 4 of the present invention is attached to the housing opening 11, and the protective fixture is cut at a position corresponding to the line AA shown in FIG. This is a cross section. The protective fixture of the present embodiment is configured to include a lower lid 2a in which the lower lid 2 of the protective fixture shown in the first embodiment is reversed. The protective fixture is not attached so as to sandwich the casing opening 11 between the upper lid 1 and the lower lid 2a, but is attached to one side of the casing opening 11. A convex portion 8 projecting on a surface of the lower lid 2 a facing the housing opening 11 is fitted into the housing opening 11, and a holding claw 7 projecting on the same surface as the convex portion 8 is formed on the housing opening 11. The protective fixing tool is fixed to the housing opening 11 by being hooked on the periphery of the housing.
Since this protective fixture is structured to be attached to one side of the casing opening 11, it is not necessary to drill the mounting slit 12 and the hinge slit 13 as shown in FIG.

First, the flat cable 14 is inserted into the upper lid slit 4 and the lower lid slit 6 and sandwiched between the upper lid 1 and the lower lid 2a, and the fixing claw 5 of the upper lid 1 is engaged with the fixing hole (not shown) of the lower lid 2. The flat cable 14 and the protective fixture are fixed. Then, the protective fixture having the flat cable 14 fixed in advance is attached to the housing opening 11 by the holding claw 7. By setting it as such an attachment procedure, the attachment efficiency in a manufacturing process can be improved.
Alternatively, after the protective fixing tool is attached to the housing opening 11 by the holding claw 7, the flat cable 14 is inserted into the upper lid slit 4 and the lower lid slit 6, and sandwiched between the upper lid 1 and the lower lid 2a and fixed. Is also possible.

As described above, according to the fourth embodiment, the protective cover that is attached to the housing opening 11 and inserts and fixes the flat cable 14 into the housing 10 is formed in the upper lid slit 4 through which the flat cable 14 is inserted. The lower lid 2 in which the lower lid slit 6 through which the flat cable 14 is inserted is formed at a position shifted from the position facing the upper lid 1 and the upper lid slit 4, and the upper lid 1 and the lower lid 2 can be bent. A hinge portion 3 connected to the upper lid 1, a fixing claw 5 for fixing the upper lid 1 and the lower lid 2, and a holding claw 7 for locking the lower lid 2 to the periphery of the housing opening 11. The upper cover 1 and the lower cover 2 are configured to be inserted and fixed by sandwiching the flat cable 14 while being hooked on the periphery of the opening 11 to cover the edge. As a result, similar to the protective fixing tool of the first embodiment, the protective fixing tool can fix the flat cable 14 to the housing opening 11, can be prevented from being damaged by the edge of the housing opening 11, and can be screwed. It becomes possible to attach to the housing opening 11 alone without using the like.

In the fourth embodiment, the holding claw 7 for hooking the protective fixture to the periphery of the housing opening 11 is provided. However, the fixing claw 5 is engaged with the lower lid 2a and the housing opening 11 together. You may comprise so that it may stop. That is, the holding claw 7 is eliminated, the fixing claw 5 is provided at a position of the upper lid 1 where the peripheral edge of the housing opening 11 is locked, and the fixing hole is provided at a position along the peripheral edge of the housing opening 11 of the lower lid 2a. To drill.

In the above description, the case where the second to fourth embodiments are respectively applied to the configuration shown in the first embodiment has been described. However, the present invention is not limited to this. The configurations from 2 to the fourth embodiment may be appropriately combined.

Since the flat cable protective fixing device according to the present invention has a structure for preventing damage due to the flat cable insertion and fixing structure to the housing opening and the edge of the housing opening, it is attached to the opening of the housing, etc. It is suitable for use as a protective fixture for fixing a flat cable in a state where it is drawn into a housing or the like.

Claims

A flat cable protective fixture that is attached to the housing opening and inserts and fixes the flat cable into the housing.
A first lid having a first slit through which the flat cable is inserted;
A second lid having a second slit through which the flat cable is inserted at a position shifted from the position facing the first slit;
A hinge portion for connecting the first lid and the second lid so as to be bendable;
The first lid and the second lid sandwich the peripheral edge of the housing opening from the front and back together with the flat cable inserted through the first slit, the housing opening, and the second slit. A flat cable protective fixture for inserting and fixing the flat cable into the housing opening.
A holding claw is provided on one of the first and second lids, and is held on the periphery of the housing opening.
The flat cable protective fixture according to claim 1, wherein a holding hole for inserting the holding claw is provided in the other lid.
Providing the first and second lids relatively with a concave and convex locking portion that locks the first and second lids together with the flat cable when the peripheral edge of the housing opening is sandwiched from the front and back. The flat cable protective fixture according to claim 1.
2. The flat cable is provided with a hole, and a holding portion that is inserted through the hole to hold the flat cable is provided in one of the first and second lids. Flat cable protective fixture.
A convex rib portion protruding from one of the first and second lids;
A groove portion recessed in a position facing the convex rib portion of the other lid,
The first lid and the second lid sandwich the peripheral edge of the housing opening from the front and back together with the flat cable, and the convex rib and the groove sandwich and hold the flat cable. The protective fixing tool for a flat cable according to claim 1.
The flat cable protective fixture according to claim 1, further comprising: a rib projecting on a surface of one of the first and second lids facing the other lid. .
A flat cable protective fixture that is attached to the housing opening and inserts and fixes the flat cable into the housing.
A first lid having a first slit through which the flat cable is inserted;
A second lid having a second slit through which the flat cable is inserted at a position shifted from the position facing the first slit;
A hinge portion for connecting the first lid and the second lid so as to be bendable;
A holding claw for hooking the second lid on the periphery of the housing opening;
The first lid and the second lid that is hooked to the periphery of the housing opening sandwich the flat cable through which the first slit and the second slit are inserted. A flat cable protective fixture for inserting and fixing a cable into the housing opening.