JP2008048581A - Clamp for flexible flat cable - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a clamp for a flexible flat cable excellent in heat dissipation property. <P>SOLUTION: The clamp is provided with: a rectangular-tub metallic receiving material 11 having a receiving opening 15 disposed on one face, and receiving the flexible flat cable F which is inserted, internally fitted and held; a cover material 12 externally fitted and covering the receiving opening 15 in the metallic receiving material 11, and pressing the flexible flat cable F to the internal face of a bottom wall 13 in the metallic receiving material 11; and a locking pawl 18 for inserting and locking the tip of the side wall of the cover material 12 to a locking hole 31 at a vehicle body 30 side. This constitution dissipates heat by bringing the bottom wall 13 of the metallic receiving material 11 into contact with the vehicle body 30 in a state that the locking pawl 18 and the locking hole 31 are locked. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a clamp for a flexible flat cable used for fixing to a vehicle body, and mainly aims to improve heat dissipation.

Conventionally, a band clamp 1 shown in FIG. 8 is provided in Japanese Utility Model Publication No. 8-7129 as a band clamp conventionally used when a wire harness routed in an automobile is fixed to a vehicle body. This type of band clamp 1 is made of a resin molded product, and includes a band portion 1a, a buckle portion 1b integrally coupled to the base end of the band portion 1a, and a vehicle body latching projecting on the upper surface of the buckle portion 1b. Part 1c.
The band clamp 1 winds the band portion 1a around the outer periphery of the wire harness, locks the band portion 1a with the buckle portion 1b and restricts the removal, and then inserts and locks the vehicle body locking portion 1c into the locking hole of the vehicle body. And fixed.

When a flat cable is routed in an automobile, a clamp shown in FIGS. 9A and 9B is provided in Japanese Patent Laid-Open No. 2004-328981 as a clamp for fixing a vehicle body.
The clamp 2 is configured to be foldable via a hinge portion 2b, and includes a clamp body 2a that holds the flat cable F over a required length, a hook portion 2c that holds the clamp body 2a in a folded state, and a hooked portion. A portion 2d and a vehicle body locking portion 2e that protrudes from the outer surface of the clamp body 2a and is inserted and locked in a locking hole provided in the vehicle body.

Further, in the case of wiring in a place that is susceptible to interference or the like of other in-vehicle parts, a clamp 3 with a protector shown in FIG. 10 disclosed in Japanese Patent Application Laid-Open No. 11-346413 is used. The clamp 3 is also made of a resin-molded product. The protector main body 3a is open at both ends, and one end side is connected to the upper end of the side wall of the protector main body 3a via the hinge part 3b so that the hinge part 3b can be pivoted. A lid 3c is provided, and a vehicle body locking portion 3d that protrudes from the outer surface of the bottom wall of the protector body 3a.
The clamp 3 with a protector accommodates a bound object 5 such as a cable in a protector main body 3a, locks and closes the lid portion 3c on the protector main body 3a, and then locks the vehicle body locking portion 3d to the locking hole of the vehicle body. The object to be bound 5 is fixed to the vehicle body by being inserted and locked (not shown).

No. 8-7129 JP 2004-328981 A Japanese Patent Application Laid-Open No. 11-346413

  However, each of the clamps 1, 2, and 3 is made of a resin molded product having low thermal conductivity, and the object to be bound 5 at a place where the clamps 1, 2, and 3 are attached is a vehicle body having high thermal conductivity. Because it does not come into contact with heat, heat dissipation is not considered. Therefore, it is likely to be overheated and may adversely affect cables and the like.

  The present invention has been made in view of the above problems, and an object of the present invention is to provide a clamp having a shape suitable as a clamp for mounting a flat cable on a vehicle body and excellent in heat dissipation.

In order to solve the above problems, the present invention is a clamp for fixing a flexible flat cable to a vehicle body,
Inserting the flexible flat cable from an accommodation opening provided on one side, and holding a square hook-shaped metal receiving material,
A cover material that fits over the housing opening of the metal receiving material and presses the flexible flat cable against the inner surface of the bottom wall of the metal receiving material;
A locking claw that is elastically deformed and inserted into the locking hole on the vehicle body side is provided at the front end of the side wall of the cover material, and the metal receiving material is locked in the locking hole. A clamp for a flexible flat cable is provided in which the bottom wall of the cable is configured to come into contact with the vehicle body.

  When the clamp is used, one surface of the flexible flat cable is always in contact with the inner surface of the bottom wall of the metal receiving material having good thermal conductivity, and the outer surface of the bottom wall of the metal receiving material is always in contact with the vehicle body. The heat generated from the flat cable is conducted from the metal receiving material to the vehicle body and can be efficiently radiated to the outside, so that the heat dissipation is high and the cable can be prevented from overheating.

In addition, since a locking claw for locking the vehicle body is provided at the end of the side wall of the cover member that closes the housing opening for the metal receiving member, the cover member is simply covered with the metal receiving member. The pawl can be inserted and locked in the locking hole of the vehicle body.
Furthermore, since the flexible flat cable is merely inserted between the metal receiving material and the cover material, no load is applied to the flexible flat cable, and the flexible flat cable is provided between the metal receiving material and the cover material. Can be moved relative to each other. Therefore, if a clamp consisting of a metal receiving material and a cover material is attached to the flexible flat cable in advance at the design position, even if the position of the locking hole of the vehicle body is displaced during the wiring work, The locking claw of the cover material can be easily aligned with the blind hole, and the workability of fixing to the vehicle body is improved.
On the other hand, when routing the flexible flat cable to the vehicle body, when passing the flexible flat cable through the metal receiving material at the vehicle body fixing position, covering the cover and inserting and locking the locking claw into the locking hole of the vehicle body, At the same time as attaching the clamp to the flexible flat cable, it can be fixed to the vehicle body.

The metal receiving material has a size capable of accommodating the flexible flat cable in a close fitting state, and is set so that the cover material is also closely attached to the metal receiving material and can be externally fitted. A clamp made of a cover material can be easily assembled.
In addition, you may provide the lock part which consists of a lock claw and a lock claw latching frame between a metal receiving material and a cover material.

In addition, if the contact between the vehicle body and the metal receiving material is not good due to unevenness on the surface of the vehicle body, etc., by applying heat dissipation silicon to the outer surface of the bottom wall of the metal receiving material, the heat dissipation silicon is applied to the vehicle body. It may be possible to dissipate heat.
As the material of the metal receiving material, a material having high thermal conductivity such as aluminum or copper is preferably used.

  It is preferable that a fixing convex portion that fits into a concave portion provided on the vehicle body side is provided from the outer surface of the bottom wall of the metal receiving member. As a result, it is possible to reliably prevent displacement and detachment of the metal receiving material.

The cover material may be a resin molded product or a metal processed product.
When the cover material is a resin molded product, the locking claw can be easily elastically deformed to increase the insertion locking workability into the locking hole on the vehicle body side, and can be easily molded into the required shape. be able to.
On the other hand, when the cover material is a metal processed product, heat can also be radiated from the cover material, and heat radiation can be further enhanced by radiating heat from both the upper and lower surfaces of the flexible flat cable.

It is preferable that the latching claws of the cover material are provided at the entire length of the side wall or at intervals in the length direction.
That is, when the length of the cover material is short, the locking claws are provided over the entire length at the lower ends of both side walls. On the other hand, when the length of the clamp made of the metal receiving material and the cover material is made large and the function of the protector is provided, the locking claws are provided at intervals. If the length of the clamp is thus increased and fixed to the vehicle body with locking claws at a plurality of locations, the clamp fixing to the vehicle body can be stabilized and the contact area between the outer surface side of the metal receiving material and the vehicle body can be increased. And since it can stabilize, heat dissipation can be improved further. In addition, the protection function of the flexible flat cable can be enhanced.

As described above, according to the present invention, heat generated from a flexible flat cable that easily generates heat can be efficiently conducted to the vehicle body via the metal receiving material in the clamp for fixing the vehicle body, and can be released. Can be increased.
In addition, since the flexible flat cable is accommodated in the metal receiving material and the cover material is simply covered, and the flexible flat cable is simply inserted between the metal receiving material and the covering material, The flexible flat cable can be protected without being loaded.

Furthermore, when the cable is routed to the vehicle, the flexible flat cable is passed through the metal receiving material to cover the cover material at the position fixed to the vehicle body, and when the locking claw of the cover material is inserted into the locking hole in the vehicle body, the clamp The work of attaching the clamp to the flexible flat cable and the work of fixing the clamp to the vehicle body can be performed at the same time, improving workability.
On the other hand, even if the flexible flat cable is attached to the clamp in advance, since the flexible flat cable can be moved relative to the clamp, even if the position of the locking hole on the vehicle body side and the locking claw of the cover material is shifted, It can be easily matched and the workability of fixing to the vehicle body can be improved.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
1 to 3 show a clamp 10 for a flexible flat cable according to a first embodiment of the present invention.
The clamp 10 includes a metal receiving material 11 that accommodates the flexible flat cable F, and a cover material 12 that covers and closes the upper surface of the metal receiving material 11.

The metal receiving material 11 is made of copper, and has a square wall shape including a bottom wall 13 and side walls 14 standing upright from both side edges in the width direction of the bottom wall 13.
The width | variety of this metal receiving material 11 is set to the width | variety which can hold the flexible flat cable F accommodated tightly. Further, the inner height H1 of the metal receiving member 11 is set to be slightly shorter than the thickness T of the flexible flat cable F as shown in FIG.

The cover member 12 has a substantially U-shaped cross section including a cover wall 16 and side walls 17 projecting from both sides of the cover wall 16 in the width direction. A plurality of locking claws 18 that are inserted and locked in the holes 31 protrude in the length direction of the side wall 17 at intervals.
The cover material 12 is a resin molded product, and the locking claw 18 is formed to be elastically deformable.

The width of the cover material 12 is set to a width that fits externally on the metal receiving material 11 and is set to a size that allows the metal receiving material 11 to be just externally fitted. The shape does not leave.
As shown in FIG. 3B, the cover material 12 covers the metal receiving material 11 so that the height H2 including the protruding height of the locking claw 18 is covered with the metal receiving material 11. With the locking claw 18 inserted and locked to 31, the cover material 12 can press the flexible flat cable F housed inside the metal receiving material 11 against the inner surface of the bottom wall 13 of the metal receiving material 11, And the dimension which can contact the outer surface of the bottom wall 13 of the metal receiving material 11 with the vehicle body 30 is set.

  When the clamp 10 is attached to the flexible flat cable F when the flexible flat cable F is routed in the vehicle, the required position of the flexible flat cable F is inserted into the metal receiving member 11 from the receiving opening 15 as shown in FIG. Then, the cover member 12 is covered with the metal receiving member 11 placed at a predetermined position of the vehicle body 30, and as shown in FIGS. 3A and 3B, the locking claw 18 of the cover member 12. Is elastically deformed to be inserted and locked into the locking hole 31 of the vehicle body 30. In this way, the clamp 10 is attached to the flat cable F and at the same time is fixed to the vehicle body 30 as shown in FIG.

On the other hand, in the case where the clamp 10 and the clamp 10 are attached to the flexible flat cable F in advance, the cover member 12 is put on the metal receiving member 11 after passing through the required portion of the flexible flat cable F and is held by fitting. .
In this state, at the time of routing to the vehicle, the clamp 10 is disposed on the vehicle body, and the locking claw 18 of the cover material 12 is inserted and locked into the locking hole 31 of the vehicle body.

  When the clamp 10 having the above-described configuration is used, as shown in FIGS. 3A and 3B, the flexible flat cable F in the metal receiving material 11 is pushed by the cover material 12, and the flexible flat cable F is connected to the metal receiving material 11. Further, the outer surface of the bottom wall 13 of the metal receiving member 11 is pressed against the surface of the vehicle body 30 so that they are in close contact with each other. Therefore, even if heat is generated from the flexible flat cable F, the heat can be released to the vehicle body 30 through the metal receiving material 11 having excellent thermal conductivity, and overheating of the flexible flat cable F can be prevented.

  In addition, since the plurality of locking claws 18 for locking the cover material 12 to the vehicle body 30 are provided at intervals in the length direction of the cover material 12, the tight contact state between the clamp 10 and the vehicle body 30 is stabilized. In addition, the flexible flat cable F and the metal receiving material 11 and the metal receiving material 11 and the vehicle body 30 can be stably adhered in a wider area.

4 and 5 show a second embodiment of the present invention.
In the present embodiment, a convex portion 19 is protruded at a substantially central portion of the outer surface of the bottom wall 13 of the metal receiving member 11, and the convex portion 19 is fitted into a concave portion 32 provided in advance at a predetermined position of the vehicle body 30. Thus, the metal receiving member 11 can be positioned and fixed.
Thereby, it is possible to prevent the metal receiving member 11 from being displaced from the vehicle body or falling off.

  When the metal receiving material 11 is long, the convex portions 19 may be provided at a plurality of locations at intervals in the length direction.

FIG. 6 shows a third embodiment of the present invention.
In the present embodiment, the length of the clamp 10 is short, the cover material 12 is made of metal, and a locking claw 20 that is continuous over the entire length in the length direction is provided at the tip of both side walls 17. .

FIG. 7 shows a fourth embodiment of the present invention.
In the present embodiment, a retaining portion 11 c that protrudes inward from the upper ends of both side walls of the metal receiving member 11 is provided to prevent the flexible flat cable F from being pulled out from the metal receiving member 11, while the central portion of the cover member 12 is provided. Are provided so that the flexible flat cable F accommodated in the metal receiving member 11 is pressed from the upper side to be surely brought into contact with the bottom surface side of the metal receiving member 11. I have to.

It is a disassembled perspective view which shows the state which attaches the clamp which concerns on 1st embodiment of this invention to a flexible flat cable, and latches to a vehicle body. The state which attaches a cover material to a metal receiving material is shown, (A) is sectional explanatory drawing which shows the state in the time of cover material attachment work, (B) is sectional explanatory drawing which shows the attachment completion state of a cover material. It is a perspective view which shows the state which latched the clamp shown in FIG. 1 to the vehicle body. It is a bottom side perspective view showing a clamp concerning a second embodiment of the present invention. FIG. 5 is an explanatory sectional view showing a normal state in which the clamp shown in FIG. 4 is locked to the vehicle body. It is a disassembled perspective view which shows the clamp which concerns on 3rd embodiment of this invention. It is sectional drawing which shows the clamp which concerns on 4th embodiment of this invention. It is a figure of a prior art example. It is a figure of another prior art example. It is a figure of another prior art example.

Explanation of symbols

F Flexible flat cable 10 Clamp 11 Metal receiving material 13 Bottom wall 12 Cover material 18 Locking claw 30 Vehicle body 31 Locking hole

Claims (4)

A clamp for fixing a flexible flat cable to a vehicle body,
Inserting the flexible flat cable from an accommodation opening provided on one side, and holding a square hook-shaped metal receiving material,
A cover material that fits over the housing opening of the metal receiving material and presses the flexible flat cable against the inner surface of the bottom wall of the metal receiving material;
A locking claw that is inserted and locked into the locking hole of the vehicle body is provided at the front end of the side wall of the cover material, and the bottom wall of the metal receiving member is in a state where the locking claw is locked in the locking hole. A clamp for a flexible flat cable, characterized in that it is configured to come into contact with the cable.   The clamp for flexible flat cables according to claim 1, wherein a fixing convex portion that fits into a concave portion provided on the vehicle body side is provided from an outer surface of the bottom wall of the metal receiving member.   The clamp for a flexible flat cable according to claim 1, wherein the cover material is formed of a resin molded product or a metal processed product.   The clamp for a flexible flat cable according to any one of claims 1 to 3, wherein the latching claws of the cover material are provided at an interval in the entire length of the front end of the side wall or in the length direction.

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