JPH0512966Y2 - - Google Patents

Description

[Detailed description of the invention] [Field of industrial application] The invention is an electromagnetic solenoid that winds a coil around the outer periphery of the cylindrical portion of a bobbin, and generates a magnetic force against an iron core placed on the bobbin by energizing the coil. Regarding this, this electromagnetic solenoid is used, for example, as an actuator for driving an electromagnetic valve or the like.

[Prior Art] An example of a commonly used electromagnetic solenoid is Utility Model Application No. 57-102770.

In this case, the coil is wound around the outer circumference of the bobbin, and the starting wire of the coil is connected to one terminal located in the terminal mounting part that is integrally formed with the bobbin, through a locking groove provided in the terminal. At the same time, the winding end wire of the coil is fixed to the other terminal disposed in the terminal mounting portion via a locking groove provided in the terminal.

On the other hand, the electromagnetic solenoid described above is formed by automatically winding a coil around the outer periphery of a bobbin using a winding machine, as shown in, for example, Japanese Utility Model Publication No. 34434/1983.

In the work of winding a coil onto a bobbin using such a winding machine, the winding start wire and winding end wire of the coil are automatically collated by the winding machine through a locking groove in the bending part for fixing each terminal. Especially when fixing the coil to the terminal, it is desirable that the winding end wire and winding start wire of the coil be fixed to the terminal with a certain tensile load applied thereto.

This is important in order to prevent the coil wound around the bobbin from coming apart when the winding end wire and winding start wire of the coil are fixed to the terminal.

For this purpose, in the past, a locking groove was provided in the terminal that protruded from the terminal mounting part, and the coil was wound around the outer periphery of the bobbin after the starting wire of the coil was placed in the locking groove of the terminal on one side. The end of the winding wire is inserted into the locking groove of the terminal on the other side via the hook part that protrudes from the terminal mounting part.

By fitting the winding start wire and winding end wire of the coil into the locking grooves in this manner, the coil can be maintained in a state where a constant tensile load is applied.
(The structure of the hook portion is not disclosed in the prior art example.) [Problem to be solved by the invention] In such a conventional electromagnetic solenoid, the winding start wire and winding end wire of the coil are connected to the terminal. When a tensile load is applied to the locking groove, the coil may come into contact with the corner of the locking groove, and depending on the electromagnetic force setting, the wire diameter may be small, such as 0.1 mm. It is difficult to select the tensile load.

In other words, if the tensile load is increased, the coil may come into contact with the corner of the locking groove, causing the coil to break.
This is because if the tensile load is weakened, the coil winding may come apart.

[Means for solving the problem] The electromagnetic solenoid of the present invention always applies an optimum tensile load to the coil regardless of the wire diameter of the coil. In order to achieve the above-mentioned purpose, one side of the terminal protruding from the terminal mounting part is sequentially provided with a locking groove and a bent part for fixing from the terminal mounting part side, and protruding from the terminal mounting part. On the other side of the terminal, a locking groove and a bent part for fixing are sequentially provided from the terminal mounting part side, and each locking groove of the terminal is covered with a covering member made of a soft material whose hardness is softer than that of the material of the terminal. The winding start line and winding end line of the sheath, coil winding line, and winding end line are aligned in each locking groove and fixed to each fixing bent part.

[Function] A certain tensile load is applied to the winding end wire and the winding start wire of the coil while they are in contact with the locking groove of the terminal covered with the covering member made of a soft material, so that the winding of the coil is prevented. The end wire and the winding start wire are not cut by the contact portion with the locking groove.

[Example] Hereinafter, an example of the electromagnetic solenoid according to the present invention will be described with reference to the drawings.

FIGS. 1 and 2 show a state in which the terminal is integrally attached to the bobbin.

1 is a cylindrical part 2 made of a synthetic resin material;
The bobbin has plate-shaped flanges 3A and 3B extending outwardly at the upper and lower portions of the cylindrical portion 2, respectively, and the portion including the upper flange 3A in the figure extends outwardly from the cylindrical portion 2. A terminal attachment portion 4 is integrally formed with the bobbin 1.

Terminals 5 and 6 are integrally attached to the terminal attachment part 4, and the left end of the terminal 5 on one side is inserted into the terminal attachment part 4, and a winding start line of a coil, which will be described later, is inserted in the middle part. Bending part 5 for fixing the coil
A is formed, and a bending portion 5B for fixing the lead wire is formed at the right end.

Also, the terminal 5 on one side between the end of the terminal mounting part 4 and the bent part 5A for fixing the coil
A locking groove 5C having a diameter smaller than that of the terminal 5 is formed in the terminal 5.

The terminal 6 on the other side is formed into an L shape and inserted into the terminal mounting part 4, and the left protruding end has a bending part 6A for fixing the coil, which is used to fix the end wire of the coil, which will be described later.
A fitting part 6B is formed at the upwardly projecting end to be fitted into a coupler (not shown), and a fitting part 6B is formed between the end of the terminal attachment part 4 and the bent part 6A for fixing the coil. A locking groove 6C having a diameter smaller than that of the terminal 6 is formed in the terminal 6 on the other side.

A hook portion 7 having a circular cross section is provided to protrude from the end surface 4A of the outer periphery of the terminal mounting portion 4.

The above is a conventionally known electromagnetic solenoid, and the electromagnetic solenoid according to the present invention is constructed as follows in order to achieve the above object.

That is, 10 is a covering member that covers each of the locking grooves 5C and 6C of the terminals 5 and 6, and is made of a material that is softer than the metal material (for example, brass) that forms the terminals 5 and 6.

In this embodiment, when the bobbin 2 is molded, it is integrally molded with the same synthetic resin material that constitutes the bobbin 2, and by such molding, the locking grooves 5C and 6C are made of synthetic resin. Covered with material. (Note that the groove must be formed even after being covered with the covering member.) Next, the work of winding the coil 8 around the bobbin 1 will be described.

The winding work of the coil 8 on the bobbin 1 is performed using a winding machine (not shown) shown in Utility Model Publication No. 62-34434, etc.
It is carried out by.

According to this, first, the winding starting wire 8 of the coil 8
After inserting the coil 8 into the bent part 5A of the terminal 5 on one side for fixing the coil, the coil 8 is placed on the cylindrical part 2 of the bobbin 1 so as to fit into the locking groove 5C of the terminal 5 on the one side. Thereafter, the coil 8 is wound around the outer periphery of the cylindrical portion 2 by a predetermined number of turns.

Next, the winding end wire 8B of the coil 8 is hooked onto the hook part 7, and after the end of winding, the wire 8B is inserted into the locking groove 6C of the terminal 6 on the other side, and then the bent part for fixing the coil on the terminal 6 on the other side Insert into the bent part of 6A. When the coil 8 is wound by a winding machine, a certain tensile load is applied.

By the above operations, the coil 8 for the bobbin 1 is
The winding work of the coil 8 is completed, and the winding start line 8A of the coil 8 and the winding are completed by pressing and caulking the bent portions 5A and 5B for fixing the coils of the terminal 5 on one side and the terminal 6 on the other side. The end wire 8B can be fixedly attached to each terminal 5 and 6, and after this work is completed, the end of the winding end wire 8B of the coil 8 is cut off.

This state is clearly shown in FIGS. 3 and 4.

The covering member in the above embodiment was integrally injection-molded with the synthetic resin material used to form the coil when the coil was molded. The locking groove can also be covered with a rubber material by heating the tubular body with, for example, a dryer.

[Effects of the invention] As described above, according to the electromagnetic solenoid according to the invention, the terminal on one side protruding from the terminal mounting part 4 is sequentially provided with a locking groove and a bent part for fixing from the terminal mounting part 4 side. On the terminal on the other side that protrudes from the terminal mounting part,
A locking groove and a bent part for fixing are provided sequentially from the terminal mounting part 4 side, and each locking groove of the terminal is covered with a covering member made of a soft material whose hardness is softer than that of the material of the terminal. Since the winding start line and winding end line are aligned in each locking groove and fixed to each fixing bend,
Even if the coil winding work is performed with the winding end wire and winding start wire of the coil placed in each locking groove using a winding machine, a certain tensile load is applied to each bending part of the terminal for fixing the coil. Since the concentrated shearing load at the contact area between the coil and the locking groove can be reduced, it is possible to produce electromagnetic solenoids with no coil dislocation and a small coil wire diameter, which provides freedom in the design of electromagnetic solenoids. This greatly improved the level of performance.

[Brief explanation of the drawing]

Fig. 1 is a side view showing an embodiment of the electromagnetic solenoid bobbin according to the present invention, Fig. 2 is a top plan view of Fig. 1, and Fig. 3 shows a state in which a coil is wound around the bobbin of Fig. 1. The side view shown in FIG. 4 is a top plan view of FIG. 3. 1...Bobbin, 2...Cylindrical part, 3A, 3B...
Flange part, 4...Terminal mounting part, 5...Terminal on one side, 5C...Latching groove, 6...Terminal on other side, 6C...Latching groove, 7...Hook part, 8...
Coil, 8A...Winding start line of coil 8, 8B
. . . Winding end wire of coil 8, 10 . . . Covering member.

Claims (1)

[Claims for Utility Model Registration] Formed by a cylindrical portion 2, collar portions 3A and 3B provided at both ends of the cylindrical portion 2, and a terminal mounting portion 4 provided outward from the cylindrical portion 2. A bobbin 1; a terminal 5 on one side and a terminal 6 on the other side made of a metal material, each integrally and protrudingly disposed on the terminal mounting portion 4 of the bobbin 1.
The winding start wire 8A of the coil 8 wound around the outer periphery of the cylindrical portion 2 of the bobbin 1 is fixed to the terminal 5 on one side, and the winding end wire 8B of the coil 8 is secured to the end surface 4A of the outer periphery of the terminal attachment portion 4. In the electromagnetic solenoid fixed to the terminal 6 on the other side via the protruding hook part 7, the terminal 5 on one side protruding from the terminal mounting part 4 is provided with a locking groove 5C and a fixing groove from the terminal mounting part 4 side. At the same time, a locking groove 6C and a bending part 6A for fixing are sequentially provided on the terminal 6 on the other side protruding from the terminal mounting part 4 from the terminal mounting part 4 side. Locking grooves 5C, 6C
is covered with a covering member 10 made of a soft material whose hardness is softer than that of the material of the terminal, and the winding start line 8A and winding end line 8B of the coil 8 are fixed in each of the locking grooves 5C and 6C. An electromagnetic solenoid fixed to the bent portions 5A and 6A of. The electromagnetic solenoid according to claim 1, wherein the bobbin is made of a synthetic resin material, and each locking groove of each terminal is covered with the same synthetic resin material as the bobbin when the bobbin is molded. . The electromagnetic solenoid according to claim 1, wherein the covered member is made of a heat-shrinkable rubber material.