JPH0662507U - Coating structure for the lead wire of the solenoid valve coil - Google Patents

Abstract

(57) [Summary] [Object] The present invention provides a solenoid valve coil that is cheaper and has the same waterproofness and insulation properties as conventional solenoid valve coils in order to solve the problems of workability and profitability. The purpose is to get. [Structure] The coating structure of the lead wire lead-out portion of the solenoid valve coil of the present invention has a terminal 4 of the coil body and a connection terminal 6 at the tip.
In a solenoid valve coil in which the connection terminal 6 of the lead wire 7 having the above-mentioned is connected to the terminal 4, the base portion of the terminal 4 at the base of the bobbin excluding the tip connection portion is molded when the exterior insulating member 3 is molded. A cylindrical projection 5 is integrally formed so as to cover the lead wire 7 having a connecting terminal 6 attached to the tip thereof, and an insulating sleeve 8 having a length covering the tip of the connecting terminal 6 further forward. The rear end is fitted to the lead wire in an airtight and slidable manner, and the terminal portion 4 on the side of the electromagnetic coil is fitted with the connection terminal 6 at the tip of the lead wire. Is fitted into the cylindrical protrusion 5 in an airtight manner.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a coating structure of a lead wire lead-out portion of a solenoid valve coil suitable for use in an atmosphere in which water droplets attach to a pipe or the like due to refrigerant control, for example.

[0002]

[Prior art]

 3 and 4 show a general solenoid valve coil before and after molding. The solenoid valve coil has a conductor 2 wound around a bobbin 1, and the conductor 2 and a lead wire 7 are connected to each other. Is connected with solder 9 or the like, the lead wire 7 is fixed with an insulating tape 10, and the outer side thereof is molded with an exterior insulating member 3 made of synthetic resin. As a method of waterproofing the lead wire lead-out portion, as shown in FIG. 4, an adhesive 11 is applied to the lead wire 7 lead-out portion and the exterior insulating member 3 of the molded coil. The outer insulating member 3 of the coil formed by molding is itself formed of a resin having an adhesive property with the lead wire 7, for example, an epoxy resin, or as shown in FIG. 12, a rubber bush 13a is provided at the lead-out portion of the lead wire, and a seal ring 14 is provided between the upper and lower portions of the center hole of the bobbin for waterproofing, or as shown in FIG. In the case of having a terminal 4 for connecting to an external lead wire and having a socket 3a around it, a connector housing covering the connection terminal 6 provided with rubber bushes 13b, 13c. There is a ring 15 such as those using a waterproof connector which hermetically inserted into the socket 3a.

[0003]

[Problems to be solved by the device]

 In the conventional waterproofing method of the solenoid valve coil shown in FIGS. 4 to 5, the lead wire 7 is directly pulled out from the coil body due to the structure, and thus the workability such as routing of the lead wire 7 is poor in the manufacturing process. . Moreover, the coil body as shown in FIG. 6 and the lead wire 7 can be separated from each other, and the waterproof connector, which has good workability, has a large number of parts and is expensive. The present invention has been made in order to solve the problems of workability and profitability as described above, and obtains a solenoid valve coil that is less expensive and has the same waterproofness and insulation as conventional solenoid valve coils. The purpose is to

[0004]

[Means for Solving the Problems]

 The coating structure of the lead wire lead-out portion of the solenoid valve coil according to the present invention covers the outer insulating member 3 of the bobbin 1 around which the conductive wire 2 is wound and which has a plurality of terminals 4 in a protruding shape, by molding with synthetic resin. In the solenoid valve coil in which the terminal 4 of the coil body is provided with the terminal 4 for connection, and the terminal 6 of the lead wire 7 having an insulation coating is connected to the terminal 4, the exterior insulating member 3 In the molding of the above, the cylindrical projection 5 is integrally formed so as to cover the base of the bobbin excluding the tip connection portion of the terminal 4, and the lead having the connection terminal 6 attached to the tip is formed. A rear end of an insulating sleeve 8 having a length covering the front end portion of the connecting terminal 6 further forward is fitted to the wire 7 in a hermetically and slidable manner with respect to the lead wire. Insert the connection terminal 6 at the end of the lead wire into In so state, is characterized in that the front end portion of the insulating sleeve 8 has to fit into the hermetically in a cylindrical protruding portion 5.

[0005]

[Action]

 In the lead wire connecting method according to the present invention, the workability and productivity are improved by separating the lead wire from the coil body in which the lead wire 2 is molded with the exterior insulating member 3 and the lead wire and the coil body are separated from each other. Since the connecting portion is covered with the insulating sleeve 8, the waterproof property and the insulating property can be maintained.

[0006]

【Example】

 Hereinafter, an embodiment of the present invention will be described in detail with reference to FIGS. The bobbin 1 is formed by winding a conducting wire 2, and the upper flange of the bobbin 1 is provided with two grooves 4a for inserting the terminals 4. The terminal 4 enables automatic winding after being inserted into the bobbin 1, and is paired with a connection terminal 6 described later. The exterior insulating member 3 is for covering the outer peripheral portion of the bobbin 1 on which the above-described conductor wire 2 is wound and the terminal 4 is provided in a projecting shape. It improves moisture resistance, flame resistance, and ignition resistance. The exterior insulating member 3 has a cylindrical projection 5 integrally formed by molding so as to cover the root of the terminal 4 except the tip connection (projection) of the terminal 4. A concave groove 16 is integrally formed on the outer periphery of the protrusion 5, and the concave groove 6 prevents the insulating sleeve 8 described later from coming off and enhances the reliability of insulation. It is a thing. The insulation-coated lead wire 7 is provided with a connecting terminal 6 at its tip, and the lead wire 7 has a cylindrical shape further forward than the tip of the connecting terminal 6 attached to the tip thereof. A rear end portion of the insulating sleeve 8 having a length including the protrusion dimension of the protrusion 5 is fitted to the lead wire in an airtight and slidable manner. Then, with the connecting terminal 6 of the lead wire fitted in the terminal 4 on the side of the electromagnetic coil, the tip of the insulating sleeve 8 is pushed forward into the cylindrical projection 5 by shifting the insulating sleeve 8 forward. It is supposed to be done. If a convex ring that fits into the groove 16 provided on the outer circumference of the protrusion 5 is provided on the inner peripheral surface of the tip end of the insulating sleeve 8, a more reliable waterproof effect and retaining effect can be obtained. can get. The material of the insulating sleeve 8 is vinyl chloride having flexibility and elasticity, and when the insulating sleeve 8 is fitted into the lead wire 7 and the protrusion 5, it elastically seals tightly to form a connecting portion. Water can be prevented from entering.

Although the above-described embodiment has described the coil used for driving the solenoid valve, the coil is not necessarily limited to the application, and can be applied to all lead wire connection methods that require waterproofness. Needless to say.

[0008]

[Effect of device]

 In the solenoid valve coil of the present invention, the cylindrical projection 5 is integrally provided at the base of the terminal at the time of molding, and the connection terminal 6 of the lead wire is inserted into the projection to connect the projection. It is possible to improve workability and productivity. In addition, since the insulation sleeve 8 previously attached to the lead wire can simply perform the waterproof disconnection treatment of the connection portion, there is an effect that an inexpensive solenoid valve coil can be obtained.

[0009]

[Brief description of drawings]

FIG. 1 is a vertical sectional side view showing a solenoid valve coil according to an embodiment of the present invention.

FIG. 2 is a perspective view showing a lead wire before connection in the embodiment of the present invention.

FIG. 3 is a side view showing a conventional solenoid valve coil before molding.

FIG. 4 is a longitudinal sectional view showing a conventional solenoid valve coil after molding.

FIG. 5 is a vertical cross-sectional view showing another example of a conventional solenoid valve coil.

FIG. 6 is a vertical sectional view showing another example of a conventional solenoid valve coil. 1 bobbin. 2 conductors. 3 Exterior insulation member. 4 terminals. 5 Projection 6 Connection terminal. 7 Lead wire 8 Insulation sleeve. 9 Solder. 10 Insulation tape. 11 Adhesive. 12
Magnetic frame. 13a ・ 13b ・ 13c Rubber bush. 14 seal ring. 15 Connector housing. 16 grooves. 17 Insulating paper.

Claims (1)

[Scope of utility model registration request] 1. A terminal 4 of a coil body, which is formed by molding an exterior insulating member 3 of a bobbin 1 having a plurality of terminals 4 wound around it with a conductor wire 2 by molding with synthetic resin.
In addition, a lead wire 7 having a connection terminal 6 at the tip and insulated
In the solenoid valve coil in which the connection terminal 6 is connected to the terminal 4, in molding the exterior insulating member 3,
A cylindrical protrusion 5 is integrally molded so as to cover the base of the bobbin excluding the tip connection part of the terminal 4, and the lead wire 7 having the connection terminal 6 attached to the tip is connected to the connection terminal. 6, the rear end of the insulating sleeve 8 having a length covering the front end portion of 6 further fits to the lead wire in an airtight and slidable manner. A covering structure of a lead wire lead-out portion of a solenoid valve coil, wherein a tip end portion of the insulating sleeve 8 is fitted into the cylindrical projection portion 5 in an airtight manner in a state in which 6 is fitted.