JPH0510327Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to an electromagnetic coil that is particularly applicable to compact, mass-produced electromagnetic pumps, electromagnetic valves, and the like.

[Conventional technology]

In order to increase production efficiency of this type of electromagnetic coil, automation has been introduced in the manufacturing process, and various improvements have been made to the coil winding frame, terminal fittings, etc.

For example, Utility Model Application No. 62-24177, Utility Model Application No. 62-24177,
As disclosed in Publication No. 87413, the winding wiring of an L-shaped lead wire consisting of a male terminal provided on a bobbin or a terminal for attaching to a printed board and a winding wiring terminal provided integrally on the spool of the coil. In both of the above two conventional techniques, the winding start part and winding end part of the coil wire are respectively wound around the winding wiring terminal provided on the terminal or relay terminal, and the winding start part and the winding end part are brought into locking contact, and the contact points are soldered. The configuration is such that the connection is made by

[Problem that the invention attempts to solve]

For the winding of an electromagnetic coil, for example, polyurethane-coated so-called enamel-coated insulated copper wire (hereinafter simply referred to as electric wire) is wound and laminated around a winding frame. The end of the wire is wound around the winding locking connection, and then wound around the winding frame, and the end of the wire after winding is similarly wound and locked around the winding locking connection, and then it is cut and wound. After finishing the work, the two winding locking connection parts are soldered to complete the electrical connection. Therefore, the wire end portions at the beginning and end of the winding are fixed to the respective winding locking connections in a tensioned state.
And the diameter of the winding of these small electromagnetic coils is
They are often extremely thin, measuring around 0.1 mm, and are difficult to cut.

Therefore, when this type of electromagnetic coil is applied to an electromagnetic pump or an electromagnetic valve, and is used for supplying fuel to combustion equipment or attached to a fuel oil pipe, the temperature of the electromagnetic coil is -20℃ before combustion. Sometimes the ambient temperature reaches about +50°C and the temperature difference becomes large, and in addition to this, the temperature of the electromagnetic coil itself increases by 60 to 70°C due to energization, so the temperature difference becomes even larger. Furthermore, when these electromagnetic pumps and electromagnetic valves are used to transfer refrigerant or cold water for air conditioning equipment or freezing equipment, the difference in ambient temperature is also large.

In these cases, the difference in ambient temperature of the electromagnetic coil is large, and the temperature difference of the electromagnetic coil itself is also large, which means that the electric wire expands and contracts to a large degree due to expansion and contraction. Accidents often occurred in which the winding start or end end of the winding was disconnected from the connection of the respective winding locking connection parts. In addition, slight vibrations during the operation of the electromagnetic pump and vibrations during the operation of the combustion equipment or cooling equipment equipped with the electromagnetic pump or the electromagnetic valve further promote the breakage of the electric wire.

Furthermore, an external force applied when inserting or disconnecting a male terminal from a female terminal for electrical connection with an external power source is transmitted to the winding start and end winding connection parts that are integrated with the male terminal, and each electric wire is This was an additional factor in the disconnection of the terminal section.

The present invention eliminates the above-mentioned defects in the conventional technology, prevents the wire terminals from being cut at the beginning and end of the winding, and easily and reliably connects the wire to the winding locking connection part, improving workability. At the same time, the terminal fitting integrally equipped with the winding locking connection part and the male terminal for electrical connection with the outside is firmly attached and fixed to the collar of the winding frame of the electromagnetic coil, and the electric wire terminals at the beginning and end of winding are attached. The purpose of the present invention is to provide a highly reliable electromagnetic coil that reliably protects the insulation of its parts and can be mass-produced at low cost.

[Means for solving problems]

The electromagnetic coil according to the present invention is provided with an electrical connection to the outside at at least one flange of a coil winding frame comprising an insulator having a flange provided at both ends of a hollow shaft and/or in the middle thereof. In a device equipped with a terminal fitting each equipped with a male terminal and a winding locking connection part for winding the coil, the winding start wire terminal part and the winding end wire terminal part are respectively hooked and detoured, and the winding end part of the winding wire is hooked and detoured. A removable extra tension pin for relaxing the tension of both ends of the electric wire is attached to the guide groove of the winding start electric wire and its winding locking connection part provided in the collar, and the guide groove of the winding end electric wire and its winding locking part. This purpose is achieved by configuring the connectors to be provided on the outside of the collar facing between the connecting parts.

[Example of the invention and its function]

Next, embodiments of the present invention will be described in detail with reference to the drawings.

Figure 1a is a front view of an embodiment of the present invention; Figure 1b is a front view of an embodiment of the present invention;
1c and 1d are respectively a plan view, a side view, and a bottom view of FIG. 1a. Figure 2a is the first
Figure 2b is a side sectional view of the extra tension pin portion in Figure 2a, Figure 3 is a bottom perspective view of Figure 1c with the bottom cover removed, Figure 4 is a top perspective view of the bottom cover. The aforementioned FIGS. 1a to 1d, and FIGS. 3 and 4 are also enlarged to approximately twice the actual size.

In the above drawings, insertion windows 17a and 17b are provided on the outside of the flanges 2 of a winding frame integrally molded with an insulator such as synthetic resin and having flanges 2 and 3 provided at both ends of the hollow shaft 1. The terminal fittings 7a, 7b, which are tightly inserted with the male terminals 5a, 5b for electrical connection to the outside for electrical connection with the outside, are made to protrude from the outside of the collar 2 on the opposite side through the same insertion window. Winding locking connection portions 6a and 6b are provided, respectively.

Further, the terminal fittings 7a and 7b are provided with locking holes 18a and 18b, respectively, and are fitted into protrusions 19a and 19b provided on the back side of the collar 2 to be tightly fixed.
Note that the terminal fitting 7a in FIG. 3 is drawn with a portion of its locking hole 18a cut away to show the shape of the protrusion 19a.

The collar 2 leads the wire tangentially to the base of the hollow shaft 1 of the winding frame from the winding locking connection part 6a where the end of the wire at the beginning of winding is wound and locked, and is shielded and protected from the outside. A guide groove 12 is provided, and an extra tension pin insertion groove 1 is provided between the guide groove 12 and the winding locking connection part 6a.
1 is inserted. For example, although not shown, a sliding type overtension pin 10 is provided on a flange of a winding frame holding shaft of a winding machine and slides in the axial direction thereof.

During winding work, first attach the wire to the winding locking connection part 6.
Start winding after winding and locking the wire terminal part 15
is brought into contact with the main part of the outer periphery of the sliding type overtension pin 10, passes through the guide groove 12, and is wound around the outer periphery of the hollow shaft 1, and thereafter is laminated and wound.

When winding is performed in multiple layers in this manner, since the wire at the beginning of winding enters the guide groove 12 and is protected, this part is prevented from being rubbed and worn and damaging the insulation coating, resulting in poor insulation and wire breakage. ing.

The winding end wire end portion 16 of the winding wire 4 is hooked from the lower part of the outer periphery of the winding wire 4 to an extra tension pin 8 provided on the outside of the collar 2, and after detouring, it is wound and locked to the winding locking connection portion 6a and cut.

After the above winding, when the winding frame is removed from the winding machine, the sliding extra tension pin 10 is also removed, and the wire is connected to the winding locking connection part 6a so as to draw a tangent to the outer periphery of the hollow shaft 1. The end portion 15 of the wire at the beginning of winding was held under tension by being caught by the sliding tension pin 10 so as to form the two sides of a substantially triangular shape that sandwiched the one side leading to the guide groove 12 drilled in the guide groove 12. relax.

On the other hand, it is hooked on the extra tension pin 8 so as to form three sides of a substantially triangle with respect to the guide groove 13 bored between the outer circumference of the winding 4 and the winding locking end portion 6a so as to draw a tangent thereto. The wire end portion 16 at the end of winding, which has been detoured and tensed, is also loosened by breaking and removing the extra tension pin 8.

As shown in FIG. 2b, the extra tension pin 8 is a needle-like projection provided at the center of the caldera-shaped recess and is molded integrally with the collar 2, making it easy to fold from the base. Note that the extra tension pin 8 is not integrally molded with the flange 2, but is a separate piece.
There is no problem even if it is inserted and implanted.

As explained above, after removing both excess tension pins 8, 10, the winding start and winding end wire terminal parts 15, 16
Loosely insert the loose parts of the guide grooves 12 and 13 into the respective guide grooves 12 and 13. Further, the wire end portions 15 and 16 are connected and fixed to the terminal fittings 7a and 7b, respectively, by soldering the winding locking connection portions 6a and 6b, respectively.

Cylinder terminal 21 and locking hole 20 provided on the back side of the collar 2
a, 20b, and 20c, and holes 24 and protrusions 23a, 23b, and 23c provided on the upper side of the bottom lid 22 are fitted, respectively, so that the bottom lid 22 is fitted and fixed to the collar 2.
By fitting and fixing this bottom cover 22 to the collar 2, the winding start and end wire terminal parts 15, 16 and their winding locking connection parts 6a, 6b are improved in electrical insulation and mechanical strength against the outside. protected.

The arrangement of the terminal fittings in the present invention is not limited to one collar as described above, but may be arranged on both collars. In addition, instead of the single winding frame as described above, an electromagnetic coil having two or more split winding frames, that is, a so-called split winding frame in which flanges are provided not only at both ends of the hollow shaft but also in the middle. In such a case, a terminal fitting can be placed in the middle of the collar.

Next, other embodiments of the present invention are shown in FIGS. 5 and 6.
This will be explained with reference to FIG.

5 is a perspective external view thereof, FIG. 6 is a perspective external view showing the terminal fittings shown in FIG. 5 taken out and arranged, and FIG. 7 is a front view of the device shown in FIG. 5.

Flanges 2' and 3' are provided at both ends of the hollow shaft 1', and the flanges 2' are provided with a terminal plate portion 25 on the outer main portion thereof and are integrally formed with an insulator such as synthetic resin.

The terminal plate portion 25 has insertion windows 17a′, 1 on its upper surface.
A rectangular hard hole with openings 7b' and 17c' is provided, and the locking pieces 14a, 14b, and 14c of which the terminal fittings 7a', 7b', and 7c' are integrated are tightly inserted into the holes and locked. It is fixed in a hooked manner by spring parts 27a, 27b, and 27c.

The terminal fittings 7a', 7b', 7c' are connected to the locking piece 14.
a, 14b, 14c and locking spring parts 27a, 27
b, 27c are integrally provided, and winding locking connection portions 6a', 6b', 6c are provided extending below the respective locking pieces and are exposed below the terminal plate portion, and terminal fittings 7b', 6c are respectively provided. 7c is integrally provided with male terminals 5b', 5c which are bent at right angles from the locking pieces 14b, 14c and protrude from both sides of the terminal plate part 25, respectively.
Furthermore, each locking piece 14a, 14b, 14c
At the center of the upper end, there is a slit 2 into which the legs or leads of electrical components such as fixed resistors or commutators are inserted.
6a, 26b, and 26c are provided.

In addition, it is also possible to add a terminal fitting with a male terminal to the terminal plate part 25, and in this case, the impedance of the electromagnetic coil increases at 60Hz compared to the one that uses 50Hz of AC power, so it is possible to add a terminal fitting with a male terminal. In order to obtain the same magnetic attraction force as when it is necessary to produce an intermediate tap with fewer turns of the coil, it can be used as a terminal fitting.

In the case of this embodiment, as in the previous embodiment, in addition to providing the terminal fitting on the collar 2', the terminal fitting is provided on the collar 3' or the collar 2',
It is also possible to provide it on the collar provided in the middle of 3'.

The winding locking connection portion 6 extends from the outside of the front of the terminal plate portion 25 to the outer periphery of the base of the hollow shaft 1′ of the collar 2′.
A guide groove 12' is provided to guide the winding wire almost tangentially from a' and to shield and protect it from the outside.
An extra tension pin 9 for hooking and detouring the winding starting wire end portion 15' is provided on the front outside of the terminal plate 25 facing between the winding locking connection portion 6a' and the guide groove 12'. There is.

Also, from the outer periphery of the winding 4', the winding locking connection part 6
A guide groove 13' for guiding the winding end wire and shielding and protecting it from the outside is provided from the outer side of the collar 2' to the front outside of the terminal plate part 25, and a winding locking connection part 6b'. The end of the winding wire terminal section 1 facing between
An extra tension pin 8' is provided for hooking and bypassing the tension pin 6'.

After winding the wire, the extra tension pins 9, 8' are removed by breaking off, and the winding start and end wire terminal portions 1 are removed.
5', 16' are respectively released from tension and their relaxed portions are loosely inserted into the guide grooves 12', 13'. It has a relaxing effect that prevents the coil from expanding and contracting due to heat generation temperature changes of the coil itself, vibration, and disconnection from the terminal and the winding locking connection parts 6a' and 6b' due to external force applied for electrical connection with the outside. .

After winding, the ends of both wire ends 15', 16' are soldered to the respective winding locking connections 6a', 6b'.

The above winding and soldering operations can be automated.

Slit 26 of terminal fitting 7c with male terminal 5c
By inserting the legs or leads of the fixed resistor 28 into the slit 26a of the terminal fitting 7a' and soldering them, the variation in the resistance value of the electromagnetic coil can be corrected and the output, that is, the magnetic force, can be made constant. You can arrange it. Furthermore, connecting the leads of the rectifying elements to both of the slits is useful when energizing the electromagnetic coil with a current obtained by half-wave rectifying the AC power source.

The other explanations in the embodiment shown in FIGS. 5 to 7 are the same as those in the previous embodiment shown in FIGS. 1a to 4, so the explanation thereof will be omitted below.

Note that there is no problem in forming the terminal fitting by inserting it into the collar of the winding frame.

[Effect of idea]

As explained above, the winding frame of the electromagnetic coil according to the present invention is provided with overtension pins that can be removed after winding at the start and end of winding, respectively, and are hooked onto the overtension pins during winding to bypass the winding. By removing the excess tension pins from the end portions of the wire at the beginning and end of the winding, the excess tension of the wire that had been detoured around and forming the two sides of a substantially triangular shape is loosened, and the winding wire and terminal fitting are loosened. The tension at the end of the wire at the start and end of the winding between the winding locking connections is relaxed, and the electromagnetic coil expands and contracts due to temperature changes due to ambient temperature and temperature rises when electricity is applied to the electromagnetic coil. This reduces and avoids the effects of vibrations during the operation of the equipment to which the electromagnetic coil is attached and external forces when connecting and disconnecting terminals when electrically connecting the electromagnetic coil to the outside. Accidents of disconnection from the locking connection can be prevented.

In addition, since the winding locking connection part of the terminal fitting is exposed on the outside of the collar of the winding frame, it can be wrapped around and locked during winding work, and the terminal processing work of soldering after winding the coil can be facilitated. It can be reliably fully automated and is suitable for mass production, reducing costs and improving productivity and reliability.

The collar and terminal board are equipped with guide grooves for the start and end of winding, which shield and protect the wire from the outside, especially when the wire at the beginning of winding is wound in multiple layers. Prevents accidents such as poor insulation and disconnection due to friction and wear.

Furthermore, the terminal fitting is tightly fixed to the collar and its terminal plate portion, and is stable both electrically and mechanically for the reasons stated above.

[Brief explanation of drawings]

Figure 1a is a front view of an embodiment of the present invention; Figure 1b is a front view of an embodiment of the present invention;
Figures 1c and 1d are top, side and bottom views of Figure 1a, respectively. Figure 2a is an enlarged partial view of the rear side of Figure 1a with the bottom cover removed;
Figure b is a partial side cross-sectional view of the extra tension pin in Figure 2a,
The figure is a bottom needle perspective view of FIG. 1c excluding the bottom cover, FIG. 4 is a plan perspective view of the bottom cover, FIG. 5 is a perspective external view of another embodiment of the present invention, and FIG. 7 is a front view of FIG. 5; FIG. 7 is a perspective view of the terminal fittings shown in FIG. 1, 1'... hollow shaft, 2, 2', 3, 3'... tsuba,
4, 4'... winding, 5a, 5b, 5c, 5b'...
Male terminal, 6a, 6b, 6a', 6b'... Winding locking connection part, 7a, 7b, 7a', 7b', 7c... Terminal fitting, 8, 8', 9... Extra tension pin, 10... ...Sliding type extra tension pin, 12, 13, 12', 13'...Guide groove, 15, 15'...Wire starting wire terminal part, 16,
16'... End of winding wire terminal section, 22... Bottom cover.

Claims (1)

[Scope of utility model registration request] A coil winding frame comprising an insulator having a flange provided at both ends of a hollow shaft and/or in the middle thereof has a male terminal and a winding locking connection on the at least one flange for electrical connection to the outside. In the terminal fitting, the winding start wire terminal part and the winding end wire terminal part of the coil winding are respectively hooked and bypassed, and both the wire terminal parts are removable after the coil is wound. An extra tension pin for relaxing the tension is provided between the guide groove of the wire at the beginning of winding and its winding locking connection portion, and the guide groove of the winding end wire and its winding locking connection portion provided on the collar. Electromagnetic coils are characterized by being provided on the outside.