JP2009050101A - Protector for circuit - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a protector for a circuit, enabling assembly work without using a jig and facilitating desired work. <P>SOLUTION: In the protector 10 for a circuit for housing an electric wire bundle including an electric wire 12 extending from the inside of a housing 14 to the outside and developing in a loop, an electric wire clamp portion 16 of a U-shaped cross section having a width smaller than the width of the electric wire 12 and capable of clamping the electric wire 12 is provided on the housing 14, and the electric wire 12 extending from the inside of the housing 14 is clamped with the electric wire clamping portion 16 and is routed so as to be turned, overlapped and returned to the housing 14. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a circuit protector that accommodates an electric wire bundle including electric wires that extend from the inside of a housing to the outside and can be developed in a loop shape.

  A timing light is usually used to check the ignition timing of an automobile engine. At the time of inspection, the timing light body is installed so as to irradiate a rotating body such as a pulley or timing belt located at one end of the engine, and the trigger clip is attached to the ignition signal wire harness connected to the engine ignition device. After being sandwiched, the power clip is connected to the positive and negative terminals of the battery.

  In this state, when the engine is rotated in an idling state, the timing light detects the ignition signal sent through the ignition signal wire harness with the trigger clip, and simultaneously irradiates the rotating body. The ignition timing is inspected based on whether or not the indicator provided in is located at a specified position.

  A conventional ignition signal wire harness is covered with a corrugated tube, and one detection electric wire is pulled out of the corrugated tube and used for inspection (see, for example, Patent Document 1).

  Further, other conventional ignition signal wire harnesses have one detection wire drawn out in a loop and the remaining wire harness is wound with a tape (see, for example, Patent Document 2).

Japanese Unexamined Patent Publication No. 2000-166053 (FIG. 9) JP 2000-348543 A (FIG. 5)

  However, the configuration described in Patent Document 1 is not preferable because it is difficult to pull out one electric wire from the corrugated tube at the time of inspection in a narrow place such as an engine room. In the configuration described in Patent Document 2, since the detection wire is drawn out in advance, the inspection work is easy, but it is necessary to wind the tape except for one detection wire when winding the tape. There is a problem that the tape winding work is difficult.

  Therefore, as another measure different from the above, as shown in FIG. 4, in consideration of the workability and inspection workability of the wire harness, one detection wire 42 is pulled out from the protector 40 that protects the ignition circuit. It is done. In this configuration, the detection electric wire 42 is fixed to the housing 46 of the protector 40 with two tie wrap bands 44, and the detection electric wire 42 can be developed in a loop as shown in FIG.

  However, in this configuration, since the electric wire 42 is fixed to the protector 40 with the two tie wrap bands 44, the band winding work process is increased, and a jig for winding the tie wrap band 44 is necessary, and the work is complicated. There's a problem.

  Accordingly, an object of the present invention is to solve the above-described problems, and to provide a circuit protector that can be assembled without using a jig and can easily perform a desired operation.

The above object of the present invention is achieved by the following configurations.
(1) In a circuit protector for accommodating a bundle of wires including an electric wire extending from the inside of a housing to the outside and deployable in a loop shape,
An electric wire holding part having a U-shaped cross section that is smaller than the electric wire and capable of holding the electric wire is provided in the housing, and the electric wire extending from the inside of the housing is held by the electric wire holding part and folded and overlapped. A circuit protector that is routed back into the housing.

  (2) The circuit protector according to (1), wherein the electric wire clamping portion has a longitudinal shape along the electric wire routing direction.

  (3) The circuit protector according to (1), wherein a plurality of the electric wire clamping portions are provided along the electric wire routing direction.

  (4) The circuit protector according to any one of (1) to (3), wherein an open portion of the electric wire clamping portion is closed by a lid that closes an upper opening of the housing.

  According to the configuration of (1), when the electric wire extending from the inside of the housing does not need to be deployed, it is fixed in a superimposed state on the side surface of the housing, so that the electric wire may interfere with other peripheral components. In addition, when necessary, the wire can be easily deployed by pulling it out from the inside of the housing.

  According to the configuration of (2), since the electric wire can be fixed with a simple configuration in which a single electric wire clamping portion is provided in the housing, manufacture is easy.

  According to the configuration of (3), by appropriately selecting a desired wire clamping portion among a plurality of wire clamping portions provided along the wire routing direction, the wire routing length along the side surface of the housing can be reduced. Can be adjusted.

  According to the configuration of (4), the clamped electric wire does not come out by closing the opening of the electric wire clamping unit with the lid.

  According to the present invention, since the electric wire holding portion is provided in the housing of the circuit protector, the electric wire extending from the inside of the housing can be held and fixed by the electric wire holding portion without using a jig or the like. An electric wire can be assembled to the housing. Moreover, since the wires are routed so as to be folded and overlapped and returned into the housing, the wires can be developed in a loop shape only when necessary, which is convenient for handling.

  The present invention is suitable as a protector for an ignition circuit used for checking the ignition timing of the engine as described above. However, as long as it works by pulling out one electric wire from a wire bundle, the purpose and use of the operation Is not limited.

  Hereinafter, an embodiment of the present invention will be described with reference to the accompanying drawings. FIG. 1 is a perspective view of an essential part of a protector for an engine ignition circuit according to a first embodiment of the present invention, and FIG. 2 is a sectional view of the essential part.

  As shown in FIG. 1, the protector 10 accommodates and protects an engine ignition circuit (not shown) in a housing 14 and also accommodates a part of a wire harness that connects the ignition circuit and the spark plug. As shown in FIG. 2, one electric wire 12 used for detection is pulled out from the wire harness and deployed in a loop shape, and the ignition timing of the engine is checked using a timing light.

  The side surface 15 of the housing 14 of the protector 10 is provided with a wire clamping portion 16 having a U-shaped cross section. The electric wire clamping portion 16 has a gap that is narrower than the width of the detection electric wire 12 extending from the inside of the housing 14, and the electric wire 12 is held by pressing the detection electric wire 12 into the gap. The electric wire clamping part 16 is formed in a longitudinal shape along the electric wire routing direction which is the longitudinal direction of the housing side surface 15 and is configured to clamp the electric wire 12 over a predetermined length.

  The electric wire 12 held by the electric wire holding portion 16 is folded at the end, and is routed so as to be overlapped via the electric wire holding portion 16 and returned to the inside of the housing 14. Accordingly, the electric wires 12 extending from the inside of the housing 14 are overlapped along the side surface 15 of the housing 14 and fixed in a folded state except during inspection.

  The upper part of the housing 14 is opened. By covering the housing 14 with a lid 18, the upper opening is covered and the inspection circuit is protected. The lid 18 extends to the upper side of the electric wire holding portion 16, and the claw portion 20 provided at the end portion of the lid 18 is engaged with the edge portion of the engagement hole 22 formed in the electric wire holding portion 16. And since the opening part of the electric wire clamping part 16 is obstruct | occluded with the lid | cover 18, even if the electric wire 12 is pulled up with big force, it does not come out of the electric wire clamping part 16. FIG.

  At the time of checking the ignition timing of the engine, the superposed electric wire 12 is developed in a loop shape as in FIG. At this time, since the opening portion of the electric wire holding portion 16 is closed by the lid 18, the electric wire 12 does not come out of the electric wire holding portion 16, and the work of developing the electric wire 12 in a loop shape is easy. Then, after the electric wire 12 is developed in a loop shape, the loop portion of the electric wire 12 is sandwiched between timing trigger trigger clips to detect an ignition signal.

  When the necessary inspection is completed, the trigger clip is removed from the electric wire 12, and the electric wire 12 that is in a loop shape is returned into the housing 14, and is overlapped again and fixed to the side surface 15 of the housing 14.

  According to the above embodiment, since the electric wire clamping portion 16 is provided integrally with the housing 14 of the protector 10, the electric wire 12 can be fixed to the protector 10 without using another jig or the like. Moreover, since the electric wire clamping portion 16 has a U-shaped cross section and has a gap narrower than the width of the electric wire 12, the electric wire 12 can be securely clamped and fixed in a press-fitted state. Moreover, since the electric wire clamping part 16 is integral with the housing 14, the electric wire clamping part 16 can be easily formed only by remodeling the metal mold | die of the housing 14. FIG.

  As described above, the electric wire clamping portion 16 may not be provided as a single unit, but may be provided in a plurality along the electric wire arrangement direction as shown in FIG. In this case, the electric wire 12 is clamped at a plurality of positions and fixed to the protector 10, and is folded and overlapped by any one of the electric wire clamping portions 16. At this time, by appropriately selecting the wire holding portion 16 that turns the wire 12, the wire routing length on the side surface 15 of the housing 14 can be adjusted, and the required loop length can be adjusted.

  In addition, this invention is not limited to the said embodiment, All modifications are possible based on the technical idea of this invention. For example, in the above-described embodiment, the detection wire is pulled out from the wire harness and used to check the ignition timing of the engine, but it may be a circuit protector for a device other than the engine. The functions and uses are not limited.

It is a principal part perspective view of the protector for engine ignition circuits which is 1st Embodiment of this invention. It is principal part sectional drawing of the protector for engine ignition circuits which is 1st Embodiment of this invention. It is a principal part perspective view of the modification of this invention. It is a principal part perspective view of the protector for conventional engine ignition circuits. It is a principal part top view of the protector for conventional engine ignition circuits.

Explanation of symbols

10, 40 Protector 12, 42 Detection wires 14, 46 Housing 15 Housing side surface 16 Wire clamping portion 18 Lid 20 Locking hole 22 Claw portion

Claims (4)

In a circuit protector that accommodates a bundle of wires including a wire that extends from the inside of the housing to the outside and can be developed in a loop shape,
An electric wire holding part having a U-shaped cross section that is smaller than the electric wire and capable of holding the electric wire is provided in the housing, and the electric wire extending from the inside of the housing is held by the electric wire holding part and folded and overlapped. A circuit protector that is routed back into the housing.   The circuit protector according to claim 1, wherein the electric wire clamping portion has a longitudinal shape along the electric wire routing direction.   The circuit protector according to claim 1, wherein a plurality of the electric wire clamping portions are provided along the electric wire routing direction.   The circuit protector according to any one of claims 1 to 3, wherein an open portion of the electric wire clamping portion is closed by a lid that closes an upper opening of the housing.

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