JP3943766B2 - Electrical component lead wire holding structure - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a lead wire holding structure for an electrical component in which a lead hole is provided in a housing that accommodates the electrical component, and a lead wire connected to the electrical component is pulled out and held from the lead hole.
[0002]
[Prior art]
Conventionally, when a lead wire connected to an electrical component is pulled out from the lead-out hole of the housing, a grommet closely fitted to the lead wire is generally attached to the lead-out hole in order to seal the lead hole and hold the lead wire. (For example, see JP-A-8-159326).
[0003]
[Problems to be solved by the invention]
However, the holding force of the grommet on the lead wire is not sufficient, and often cannot resist the tensile force applied to the lead wire, which may cause the lead wire to shift. , It causes the breakage of the connection part between the lead wire and the electrical component.
[0004]
The present invention has been made in view of such circumstances, and the lead wire drawn out from the lead-out hole of the housing is strongly held in the housing, and the lead wire can be prevented from being displaced easily and reliably by an external force. An object of the present invention is to provide a lead wire holding structure for an electrical component.
[0005]
[Means for Solving the Problems]
In order to achieve the above object, the present invention provides an electrical component lead wire holding structure in which a lead hole is provided in a housing that accommodates an electrical component, and a lead wire connected to the electrical component is pulled out from the lead hole and held. A cylindrical portion surrounding the lead-out hole is formed in the housing, and a holding groove is provided on the side wall of the cylindrical portion for bending and passing the lead wire drawn out from the lead-out hole; A cap for sandwiching the lead wire between the lead wire and a grommet that is in close contact with the outer peripheral surface of the lead wire is attached to the recess provided in the lead-out hole, and the lead wire is attached to the cap. across in with the outer end of the corresponding Gurome' preparative contact forms an abutment for suppressing withdrawal to its outward, a lead wire drawn out by the bending, the cap It is sandwiched between the bottom surface of the pressing portion and the holding groove provided for the first said.
[0006]
According to the first feature, the lead wire can be strongly held between the cap and the inner surface of the holding groove only by fitting the cap to the cylindrical portion of the housing. Therefore, it is possible to reliably prevent the lead wire from being displaced due to an external force, and to avoid the breakage of the connecting portion between the electrical component and the lead wire in the housing.
[0007]
In addition, a grommet that is in close contact with the outer peripheral surface of the lead wire is attached to the concave portion provided in the lead-out hole, and the cap contacts the outer end of the corresponding grommet across the lead wire and outwards. A contact portion is formed to suppress the separation of the lead wire, and the lead wire pulled out by bending is held between the pressing portion provided on the cap and the bottom surface of the holding groove, so that the lead wire is held. The cap can prevent the grommet from coming off at the same time. Therefore, the grommet can be held by a simple structure, the grommet can be prevented from being deformed by an external force, and the sealing state of the drawer hole can be kept good for a long time.
[0008]
The present invention, in addition to the first feature, the second feature in that the holding groove is provided circumferentially on different locations of the tubular portion.
[0009]
According to the second feature, by selecting the holding grooves provided at a plurality of locations of the cylindrical portion and engaging the lead wires with the holding grooves, the wiring direction of the lead wires is set to avoid interference with peripheral devices. It can be set freely.
[0010]
[Embodiment]
DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below based on examples of the present invention shown in the accompanying drawings.
[0011]
1 is a plan view of a solenoid valve having a lead wire holding structure for an electrical component of the present invention, FIG. 2 is a sectional view taken along line 2-2 of FIG. 1, FIG. 3 is a sectional view taken along line 3-3 of FIG. Is a plan view of the cap in the solenoid valve, FIG. 5 is a bottom view thereof, FIG. 6 is a sectional view taken along line 6-6 in FIG. 4, and FIG. 7 is a sectional view taken along line 7-7 in FIG.
[0012]
First, in FIG. 1 and FIG. 2, reference numeral 10 is an electromagnetic valve used for maintaining the brake hydraulic pressure of an automobile, and a synthetic resin housing 11 is provided with a pair of storage chambers 12. A bobbin 14 around which a coil 13 as an electrical component is wound, and a valve component (not shown) that is activated by excitation of the coil 13 are accommodated.
[0013]
A base portion of a pair of terminal pieces 15 connected to both ends of the coil 13 is embedded in the bobbin 14, and a pair of lead wires 17 are connected to the terminal pieces 15 by welding or soldering, respectively.
[0014]
As shown in FIGS. 2 and 3, a pair of lead holes 16 are formed in the end wall of the housing 11 for each storage chamber 12, and a pair of lead wires 17 are drawn through these. Each drawer hole 16 is provided with a large-diameter and deep cylindrical recess 16a on the outer end side thereof, and a rubber grommet 19 that fits the outer peripheral surface of the corresponding lead wire 17 is fitted into the recess 16a. Be dressed. The grommet 19 is formed with a plurality of annular seal ridges 19a in close contact with the inner peripheral surface of the recess 16a on the outer peripheral surface thereof.
[0015]
The end wall of the housing 11 is integrally formed with a cylindrical section 22 having a rectangular cross-section surrounding the outer opening of each pair of lead-out holes 16, and both side walls 22a on the long side of each cylindrical section 22 are formed. The holding groove 23 is provided on the short side, and the locking holes 24 are provided on both side walls 22b on the short side. The lead wire 17 drawn out from the lead-out hole 16 is wired so as to be bent at a right angle in a desired direction and pass through the holding groove 23.
[0016]
A synthetic resin cap 26 is attached to each cylindrical portion 22 as follows. That is, the cap 26 has a shape that fits the inner periphery of the cylindrical portion 22, and has a pair of locking claws 27 protruding on one opposite outer surface , and the cap 26 is pushed into the cylindrical portion 22. When the fitting is performed, the locking claw 27 is elastically engaged with the locking hole 24 of the cylindrical portion 22, and the cap 26 is held at the fitting position. The lower surface of the locking claw 27 is formed on an inclined surface 27 a that makes the engagement with the locking hole 24 smooth.
[0017]
As shown in FIGS. 2 to 7, the cap 26 has a groove-shaped pressing portion 28 that can clamp the lead wire 17 in cooperation with the bottom surface of each holding groove 23 when attached to the cylindrical portion 22, A pair of abutting portions 29 that abut against the outer ends of the corresponding grommets 19 across the lead wires 17 are formed. At that time, the gap between the pressing portion 28 and the bottom surface of the holding groove 23 is such that when the lead wire 17 is sandwiched between them, a normal outer diameter of the coating is formed so that a pressing mark 31 is generated in the coating of the lead wire 17. Set smaller.
[0018]
Next, the operation of this embodiment will be described.
[0019]
In assembling the electromagnetic valve 10, first, the bobbin 14 with the coil 13 and a valve component (not shown) are accommodated in the housing 11 while the lead wire 17 is drawn from the inside of the housing 11 through the drawing hole 16 to the outside. Next, the grommet 19 fitted to the outer periphery of the lead wire 17 is mounted in the recess 16a of the lead-out hole 16, and then the lead wire 17 is bent at a right angle in a desired direction to form a holding groove 23 positioned in that direction. Engage. That is, the lead wire 17 is selected in order to avoid interference with adjacent devices of the solenoid valve 10 by selecting the holding grooves 23 provided at different locations on the circumference of the cylindrical portion 22 and engaging the lead wire 17 therewith. 17 wiring directions can be freely set.
[0020]
After that, when the caps 26 are pushed into the inner circumferences of the respective cylinder portions 22 and fitted, the pressing portions of the caps 26 and the bottom surfaces of the holding grooves 23 cooperate to sandwich the lead wires 17. Since the pressing mark 31 is formed on the coating, its clamping force is strong, it can sufficiently resist external force such as tensile force applied to the lead wire 17 and can prevent its longitudinal displacement easily and reliably. Breakage of the connecting portion between the terminal piece 15 and the lead wire 17 can be avoided.
[0021]
At the same time, the cap 26 abuts the abutting portion 29 on the outer end of the corresponding grommet 19 across the lead wire 17 to prevent the cap 26 from being detached from the pull-out hole 16. Is no longer necessary. Therefore, the grommet 19 can be held with a simple structure, the deformation of the grommet 19 due to external force can be prevented, and the sealing state of the extraction hole 16 can be kept good for a long time.
[0022]
The present invention is not limited to the above embodiment, and various design changes can be made without departing from the scope of the invention. For example, instead of the coil 13 and the like, the housing 11 can accommodate a switch component and other electrical components. Further, the cylindrical portion 22 of the housing 11 can be formed in a cylindrical shape.
[0023]
【The invention's effect】
As described above, according to the first feature of the present invention, the lead wire of the electrical component is provided with the lead hole provided in the housing accommodating the electrical component, and the lead wire connected to the electrical component is pulled out from the lead hole and held. In the holding structure, the housing is formed with a cylindrical portion surrounding the lead-out hole, and a holding groove is provided on the side wall of the cylindrical portion for bending and passing the lead wire drawn out from the lead-out hole. A cap that clamps the lead wire between the inner surface of the groove is fitted , and a grommet that is in close contact with the outer peripheral surface of the lead wire is attached to the recess provided in the lead-out hole. A contact portion is formed on the grommet so as to straddle the outer end of the corresponding grommet straddling the lead wire and prevent the grommet from being detached outwardly. The lead wire is connected to the grommet. On. Thus nipped between the bottom surface of the holding groove and the pressing portion provided in the cap, only fitting the cap to the cylindrical portion of the housing, the inner surface of the holding groove the cap The lead wire can be strongly clamped between them, thereby not only preventing the lead wire from being displaced by an external force, but also avoiding breakage of the connection between the electrical component and the lead wire in the housing. The cap that holds the lead wire can prevent the grommet from being removed at the same time. Therefore, the grommet can be held with a simple structure to prevent the grommet from being deformed by an external force, and the extraction hole can be kept in a good sealing condition over a long period of time. be able to.
[0024]
Further, according to the second feature of the present invention, since the holding grooves are provided at a plurality of different locations on the circumference of the cylindrical portion, a plurality of holding grooves are selected and a lead wire is engaged therewith. Therefore, the wiring direction of the lead wires can be freely set to avoid interference with peripheral devices.
[Brief description of the drawings]
FIG. 1 is a plan view of a solenoid valve provided with a lead wire holding structure for an electrical component of the present invention.
FIG. 2 is a cross-sectional view taken along line 2-2 of FIG.
3 is a cross-sectional view taken along line 3-3 in FIG.
FIG. 4 is a plan view of a cap in the solenoid valve.
FIG. 5 is a bottom view of the same.
6 is a sectional view taken along line 6-6 of FIG.
7 is a cross-sectional view taken along line 7-7 in FIG.
[Explanation of symbols]
11 ... Housing 13 ... Electric parts (coil)
16... Lead-out hole 17... Lead wire 19... Grommet 22. ..Contact part

Claims (2)

An electrical component in which a lead hole (16) is provided in the housing (11) containing the electrical component (13), and the lead wire (17) connected to the electrical component (13) is pulled out from the lead hole (16) and held. Lead wire holding structure,
A cylindrical portion (22) is formed in the housing (11) to surround the extraction hole (16), and a lead wire (17) extracted from the extraction hole (16) is formed on a side wall of the cylindrical portion (22). A holding groove (23) to be bent and passed is provided, and a cap (26) for holding the lead wire (17) between the holding groove (23) and the inner surface of the holding groove (23) is fitted ,
Further, a grommet (19) that is in close contact with the outer peripheral surface of the lead wire (17) is attached to the recess (16a) provided in the lead hole (16), and the lead wire (17) is attached to the cap (26). ) To form an abutting portion (29) that abuts against the outer end of the corresponding grommet (19) and suppresses its outward release,
The lead wire (17) pulled out by bending is sandwiched between a pressing portion (28) provided on the cap (26) and a bottom surface of a holding groove (23) . Lead wire holding structure. The lead wire holding structure for an electrical component according to claim 1 ,
A lead wire holding structure for an electrical component, wherein the holding groove (23) is provided at a plurality of different locations on the circumference of the cylindrical portion (22).

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