JPH0851744A - Coil connector for motor apparatus and manufacture of harness therefor - Google Patents

Abstract

PURPOSE:To provide a connector excellent in waterproofness which enhances the workability. CONSTITUTION:The coil connector for motor apparatus comprises a coil 1 of motor apparatus having a tubular socket part 2 into which a coil conduction terminal 3 is projected, and a harness 4 being inserted into the socket part 2 and connected therewith. The harness 4 comprises a power cord 16, a housing 17 connected with the forward end of a cord core 16a and incorporating a female terminal 15 being fitted over the coil conduction terminal 3, and a plug 18 molded of an elastic insulating material to wrap the housing and the coated part at the forward end of the cord 16. Annular groove 19 and protrusion 20 engaging each other are provided at the fitting part of the plug 18 and the socket part 2 in order to prevent removal of the harness 4 and to provide a watertight sealing at the fitting part through elastic engagement.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a connector device for a coil of electric equipment such as a solenoid valve, an electric flow control valve, a motor, etc., and a method of manufacturing a harness used in this connector device.

[0002]

2. Description of the Related Art A solenoid valve as disclosed in Japanese Patent Laid-Open No. 63-147978 and an electric device such as an electric flow control valve (electric valve) as disclosed in Japanese Utility Model Laid-Open No. 5-32885 have a coil. A connector device is provided for electrically connecting the power cord.

FIG. 4 and FIG. 5 show a conventionally known connector device applied to the above-mentioned electric equipment. FIG.
The connector device of the conventional example 1 shown in FIG.
And a harness 4 inserted into and connected to the socket portion 2 of the electric device coil.

This harness 4 has a power cord 6 having a female terminal 5 which can be inserted and connected to the coil energizing terminal 3 and which is connected to the tip thereof.
And a male connector 7 made of synthetic resin which can be inserted and connected in the socket portion 2 having an inner hole into which the power cord 6 with the female terminal is inserted, and a cord surrounding hole of the male connector 7. 7a and a rubber bush 8 for waterproofing the outer peripheral portion of the cord 6, and between the socket portion 2 and the male connector 7 by a cylindrical rubber packing 9 arranged in the connector insertion portion of the socket portion 2. It has a waterproof structure that seals.

Further, the connector device of the second conventional example shown in FIG. 5 has a cylindrical socket portion 2 and an electric equipment coil 1 in which a coil energizing terminal 3 is projected at the inner center of the socket portion,
A power cord 6 having a female terminal 5 insertably connectable to the coil current-carrying terminal 3 at the tip thereof, and a synthetic resin housing 1 provided at the tip of the power cord 6 and having the female terminal 5 built therein.
0 and the housing 10 is connected to the coil energizing terminal 3
It has a waterproof structure in which the sealing material 11 is injected and fixed in the internal space of the socket portion 2 while being inserted and connected to.

[0006]

In the connector device of the conventional example 1 shown in FIG. 4, since the rubber bush 8 is required for each cord, the number of parts of the multipole coil and the like increases.
There are disadvantages that the number of assembling steps is increased and the connector is enlarged. Further, since the waterproof property between the power cord 6 and the rubber bush 8 is established by the compression of the rubber bush 8, it is possible to maintain the close contact state over the entire circumference by the pulling direction of the power cord 6 or adhesion of foreign matter. It was difficult in some cases, and it was not completely waterproof.

Further, the connector device of the second conventional example shown in FIG. 5 has the advantage that the rubber bush 8 and the rubber packing 9 as described above are unnecessary, but the sealing material 11 is provided in the internal space of the socket portion 2. There is a problem in that workability is poor because it must be injected and fixed.

Further, it is difficult to select and fix the sealing material 11, and air bubbles may be present after the fixing, so that the waterproofing is still not achieved. There is also a problem that the sealing material 11 is cracked due to heat shock or the like.

The present invention has been made to solve the above-mentioned conventional problems, and a first object thereof is to provide a small-sized connector device which is excellent in waterproofness and has good workability. A second object is to provide a manufacturing method capable of inexpensively manufacturing the harness used for the connector device by an injection molding method or the like.

[0010]

In order to achieve the first object, the invention according to claim 1 has a cylindrical socket portion 2 and a coil energizing terminal 3 is projected into the socket portion 2. In a connector device for an electric device coil, which includes an electric device coil 1 and a harness 4 that is inserted and connected to a socket portion 2 of the electric device coil 1, the harness 4 is a power cord 16 and a tip end of the cord core wire 16a. A housing 17 containing a female terminal 15 that can be inserted and connected to the coil energization terminal 3 connected to the housing 17, and the housing 17
And a plug 18 formed of an elastic insulating material that is formed and adheres so as to wrap around the tip covering portion of the cord 16.
And an annular groove portion 19 and a protrusion portion 20 which elastically engage with each other in a concave-convex manner are provided in the fitting portion of the plug 18 and the socket portion 2, and the harness is formed by the elastic engagement of the groove portion 19 and the protrusion portion 19. It is characterized in that the plug 4 is prevented from coming off and the plug fitting portion is waterproofly sealed.

The arrangement relationship between the groove portion 19 and the protrusion portion 20 is such that the groove portion 1 is formed in either the plug 18 or the socket portion 2.
9 has a protrusion 20 on the other side, and an annular protrusion 20 is provided on the outer periphery of the socket 2 and an annular groove 19 elastically engaged with the protrusion is provided on the inner periphery of the plug 18. Although it is possible to enclose it, in order to make the plug 18 small, an annular groove portion 19 is enclosed on the outer periphery of the socket portion 2 and an annular protrusion portion 20 elastically engaged with this groove portion is provided. It is desirable that the plug 18 be integrally provided on the inner peripheral portion of the plug 18 (the structure of claim 2).

In order to achieve the second object, in the invention according to claim 3, a mold device 25 for defining a plug molding cavity 28 by an upper mold 21, a lower mold 22 and a nest 23 is used. The housing 17 is inserted into the insertion hole 23a of the entry 23, and the power cord 1 with this housing 1
After setting 6 in the lower mold 22, the upper mold 21 and the lower mold 22 are clamped, and the plug molding material is injected and injected into the cavity 28 to mold the plug 18, whereby the housing 17 part and the power cord 16 The tip covering part of the plug 18
It is characterized in that the harness 4 molded inside is manufactured.

[0013]

According to the connector device for the coil of the electric device according to the first and second aspects, the plug 18 formed of the insulating material is formed and adhered so as to wrap around the housing 17 part and the tip end covering part of the power cord 16. Even if a rubber bush or the like is not inserted in the connecting portion between 18 and the power cord 16, it is possible to completely prevent water from entering from the connecting portion.

Further, since the connector device is provided with the annular groove portion 19 and the protrusion portion 20 which are elastically engaged in the fitting portion of the plug 18 and the socket portion 2 with each other, the elasticity of the groove portion 19 and the protrusion portion 20 is provided. By the engagement, the harness 4 can be prevented from coming off and the plug fitting portion can be waterproofly sealed, and the complete waterproofing of the connector portion can be achieved in combination with the molded and adhered structure of the plug 18. According to the harness manufacturing method of the third aspect, the harness 4 having a special structure used for the connector device can be manufactured inexpensively by an injection molding method or the like.

[0015]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment of the present invention will be specifically described below with reference to FIG. The electric device coil 1 shown in FIG. 1 is used as a stator coil (stator coil) of an electric flow control valve as disclosed in Japanese Utility Model Laid-Open No. 5-32885, and a coil wound around a bobbin 13 is synthesized. The outer shell insulating member 12 made of resin is molded, and the outer shell insulating member 12 is integrally formed with a cylindrical (for example, rectangular tube or elliptic tube) socket portion 2 and the coil is formed at the center of the inside of the socket portion 2. The energizing terminal 3 is configured to project as shown in FIG.

The harness 4 which is inserted and connected to the socket portion 2 as shown in FIG. 1A has a power cord 16 having a plurality of core wires made of a cabtyre cable having a plurality of core wires, and soldering or caulking at the tips of the respective cord core wires 16a. A plurality of female terminals 15 insertable and connectable to the coil energizing terminal 3 connected by means such as the above, an insulating resin housing 17 containing the female terminals, the base of the housing 17 and the tip of the cord 16. An elastic insulating material (for example, a rubber material or a synthetic resin) that is molded and adheres so as to wrap the covering portion.
And a plug 18 molded in.

Then, an annular groove portion 19 and a protrusion portion 20 including a square annular shape, an elliptic annular shape, etc., which elastically engages with the plug 18 and the socket portion 2 in a concavo-convex manner, are provided, and the groove portion 19 and the protrusion portion are provided. The harness 20 is elastically engaged as shown in FIG. 1A to prevent the harness 4 from coming off and to seal the plug fitting portion from water.

The groove 19 and the protrusion 20 may be arranged in such a manner that the groove 19 is provided on one of the plug 18 and the socket 2 and the protrusion 20 is provided on the other side.
It is also possible to project a projecting portion 20 on the outer periphery of the plug 18 and enclose the groove portion 19 elastically engaged with the projecting portion on the inner circumferential portion of the plug 18, but in the case of this embodiment, the plug 18 is provided. In order to make the size small, the groove portion 19 is provided on the outer periphery of the socket portion 2, and the projection portion 20 elastically engaged with the groove portion is provided with the plug 18.
Is integrally formed on the inner peripheral portion of the.

FIG. 2 shows a second embodiment of the present invention in which the numbers of the groove portions 19 and the protrusion portions 20 are changed. In the second embodiment, a plurality of groove portions 19a and 19b are provided on the outer circumference of the socket portion 2.
And a plurality of protrusions 20 that are elastically engaged with the grooves.
Since a and 20b are integrally formed on the inner peripheral portion of the plug 18, and the other structure is the same as that of the first embodiment shown in FIG. The description is omitted.

FIG. 3 is an explanatory view showing a method of manufacturing the harness 4 used in the connector device of the present invention. This harness 4 manufacturing method uses a mold device 25 that defines a plug molding cavity 28 by an upper mold 21, a lower mold 22, and an insert 23, and inserts a housing 17 (female terminal) into an insert hole 23a of the insert 23. 15) is inserted, the power cord 16 with the housing is set in the lower mold 22, the upper mold 21 and the lower mold 22 are clamped, and a plug molding material (not shown) is attached to the cavity 28. 1) is injected and molded to form the plug 18, the housing 17 and the tip end coating portion of the power cord 16 are inserted into the plug 18 as shown in FIG.
The harness 4 molded as described above is manufactured.

FIG. 6 shows a disclosed example of a connector device which is not related to the gist of the present invention. This disclosure example is the actual Kaihei 5-328.
The electric device coil 1 (mold coil) used as the stator coil (stator coil) of the electric flow control valve as disclosed in Japanese Patent Publication No. 85 is provided with the coil energizing terminal 3 in the connector portion 32 of the outer insulation member 12 (mold). FIG. 6 (A)
As shown in FIGS. 6 (B) and 6 (C), the horizontal cord-out type housing 30 and the downward cord-type housing 31 are selectively attached to the connector portion 32 protruding from the terminal as shown in FIGS. The power cord 36 to which the terminal 35 is connected is fixed by a sealing material 37 injected into the housings 30 and 31 to form a waterproof structure.

With this structure, with one type of electric equipment coil 1 (molded coil), the power cord 36 can be selected from the sideways projection as shown in FIG. 6B and the downward projection as shown in FIG. 6C. It can be freely performed when the cord is attached, and it is possible to easily solve the problem of the cord attachment work due to the attachment location of the electric flow control valve.

[0023]

According to the connector device for the coil of the electric device according to the first and second aspects of the present invention, the plug 18 molded of the insulating material is molded and adhered so as to wrap the housing 17 and the tip end coating portion of the power cord 16. Therefore, even if a rubber bush or the like is not inserted in the connecting portion between the plug 18 and the power cord 16, water intrusion from the cord connecting portion can be completely prevented. In addition, since the annular groove portion 19 and the protrusion portion 20 that elastically engage and disengage with the plug 18 and the socket portion 2 are provided, the groove portion 19 and the protrusion portion 20 are provided.
Due to the elastic engagement, the harness 4 can be prevented from coming off and the plug fitting portion can be waterproofly sealed, and the complete waterproofing of the connector portion can be achieved in combination with the molded and adhered structure of the plug 18.

According to the harness manufacturing method of the third aspect of the present invention, it is possible to manufacture the harness 4 having a special structure used for the connector device at a low cost by an injection molding method or the like. .

[Brief description of drawings]

FIG. 1 is a structural explanatory view showing a connector device for an electric device coil according to a first embodiment of the present invention, and FIG.
Is a vertical sectional view of the connector connected state, and FIG. 6B is a vertical sectional view of the connector disconnected state.

FIG. 2 is a structural explanatory view showing a connector device of an electric device coil according to a second embodiment of the present invention, and FIG.
Is a vertical sectional view of the connector connected state, and FIG. 6B is a vertical sectional view of the connector disconnected state.

FIG. 3 is a vertical cross-sectional view showing a method of manufacturing a harness used in the connector device of the first embodiment in a mold clamped state of a molding die device.

FIG. 4 is a cross-sectional view of essential parts showing a connector device of Conventional Example 1.

FIG. 5 is a cross-sectional view of essential parts showing a connector device of Conventional Example 2.

6A and 6B are configuration explanatory views showing a disclosed example of a connector device unrelated to the gist of the present invention, in which FIG. 6A is a vertical cross-sectional view of an electric device coil, and FIG. 6B is a power cord for the coil. Is a vertical cross-sectional view when the power cord is connected to the coil in a horizontal state, and FIG.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Electric equipment coil, 2 ... Socket part, 3 ... Coil energizing terminal, 4 ... Harness, 15 ... Female terminal, 16 ... Power cord, 16a ... Cord core wire, 17 ... Housing, 18 ... Plug, 19 (19a, 19b) ) ... Groove, 20 (20a,
20b) ... Projection part, 21 ... Upper mold, 22 ... Lower mold, 23 ... Nest, 23a ... Insertion hole, 25 ... Mold device, 28 ... Plug molding cavity.

Claims (3)

[Claims] 1. A coil for use in an electric device such as a solenoid valve, an electric flow control valve, a motor, etc., which has a cylindrical socket portion and a coil energizing terminal is projected into the socket portion, and a socket portion for the coil of the electric device. In a connector device for an electric device coil including a harness to be inserted and connected, a power cord is provided for the harness, and a housing is provided that has a female terminal that is insertably connectable to the coil energizing terminal connected to a tip of the cord core wire. , A plug formed of an elastic insulating material that is molded and adhered so as to wrap around the housing and the tip covering portion of the cord, and the plug and the fitting portion of the socket portion are elastically concavo-convexly engaged. A ring-shaped groove and a protrusion are provided, and the elastic engagement of the groove and the protrusion prevents the harness from coming off and seals the plug fitting portion in a waterproof manner. A connector device for an electric device coil, which is characterized in that 2. An annular groove portion is surrounded by an outer periphery of the socket portion, and an annular protrusion portion elastically engaged with the groove portion is integrally provided on an inner peripheral portion of the plug. The connector device for the electric device coil according to claim 1. 3. A mold device for defining a plug molding cavity by an upper mold, a lower mold and a nest is used, a housing is inserted into an insertion hole of the nest, and a power cord with the housing is set in the lower mold. After that, the upper mold and the lower mold are clamped, and the plug molding material is injected and injected into the cavity to mold the plug, thereby manufacturing the harness in which the housing portion and the tip end coating portion of the power cord are molded in the plug. A method for manufacturing a harness used for a connector device for an electric device coil, comprising: