JP3524814B2 - Coil bobbin for electrical equipment - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement of a coil bobbin used for winding a coil for a small electric device such as a rake coil induction motor.

[0002]

2. Description of the Related Art Conventionally, a coil bobbin used for winding a coil of a small electric device such as a rake coil induction motor is constructed as shown in FIGS. In FIGS. 11 and 12, reference numeral 1 denotes a coil bobbin, which includes a hollow winding cylinder 3 around which the coil 2 is wound, and a pair of collar portions 4 and 5 located at both ends thereof. As shown in FIG. 13, one lead portion 4 of the pair of collar portions 4 and 5 has a lead-out passage 7 for leading the lead wire 2s on the winding start side of the coil 2 and the lead wire 2s. And lead wire 1
An accommodating portion 8 having a bottomed rectangular tube shape for accommodating a connecting portion with 2s is formed, and, as shown in FIG. 14, a lead wire 2e on the winding end side of the coil 2 is formed in the other collar portion 5. A lead-out groove 9 for leading out the lead wire and a housing portion 10 having a bottomed rectangular tube shape for housing a connecting portion between the lead wire 2e and the lead wire 12e are formed. Reference numeral 11 is an insertion hole for inserting the lead wires 12s and 12e.

Next, a case where the coil 2 is wound around the coil bobbin 1 and the lead wires 2s and 2e of the coil 2 are connected to the lead wires 12s and 12e will be described with reference to FIGS. Coil 2 on coil barrel 3 of coil bobbin 1
After winding (see FIGS. 11 and 12), as shown in FIGS. 13 (a) and 14 (a), the lead wires 12s and 12e are inserted into the insertion holes 11 formed in the collar portions 4 and 5, The lead wires 2s and 2e of the coil 2 which are led out to positions close to the accommodating portions 8 and 10 are connected to the core wire portion and the covering portion by winding the lead wires 2s and 2e a predetermined number of times, and the connecting portion is soldered. .

Subsequently, as shown in FIGS. 13 (b) and 14 (b), the soldered connection portion is inserted into the accommodating portions 8 and 10 from the openings 8a and 10a of the accommodating portions 8 and 10, respectively.
The lead wire 1 which is housed in a predetermined position and then loosened
2s, 12e are pulled to move the lead wires 12s, 12e
Is inserted into the cutouts 8b and 10b formed on the side of the openings 8a and 10a of the accommodating portions 8 and 10, thereby completing the work of connecting the lead wires 2s and 2e of the coil 2 to the lead wires 12s and 12e.

As a result, each lead wire 2 of the coil 2 housed in the housing parts 8 and 10 formed in the collar parts 4 and 5, respectively.
Even if the lead wires 12s, 12e are subjected to tensile stress due to the wedge action of the insertion hole 11 and the cutouts 8b, 10b, the connecting portion between the s, 2e and the lead wires 12s, 12e, It can be accommodated and held well without being pulled out from 10.

[0006]

However, the coil bobbin constructed as described above has the following problems.

(1) During the work of connecting the lead wire and the lead wire on the winding end side of the coil, the coil wound around the coil bobbin may loosen from the winding end side of the coil. Before performing the connecting work, it is necessary to perform a pre-work such as sticking an adhesive tape on the outer peripheral surface of the wound coil.

(2) Further, since the insertion hole for inserting the lead wire pierced in the coil bobbin is generally formed to have a diameter slightly larger than the wire diameter (diameter dimension) of the lead wire, The work of inserting the lead wire into the hole is very time-consuming and difficult.

(3) Further, since each lead wire of the coil and the lead wire are accommodated in the accommodating portion from the same direction (opening side), the lead wire is accommodated in a predetermined position of the accommodating portion. There is a risk of breakage due to load on the lead wire at the connection part with, and in the vicinity of the lead-out passage and lead-out groove from the lead-out groove to the accommodating part. Since it was prevented by adjusting the number of times the leader wire was wound, it was very troublesome.

In view of the above-mentioned various problems, the present invention provides a coil bobbin for electric equipment which enables quick and easy connection work between each lead wire of a coil and a lead wire.

[0011]

In order to solve the above problems, the present invention provides a hollow winding cylinder around which a coil is wound, and a pair of winding cylinders formed integrally with the winding cylinder at both ends thereof. In the coil bobbin consisting of the collar portion, of the pair of collar portions,
The collar portion located on the winding start side of the coil accommodates a lead-out path for leading the lead wire on the winding start side of the coil, and a connecting portion between the lead wire on the winding start side and a lead wire connected to the lead wire. And a hook-shaped retaining portion for locking the lead wire irremovably,
The collar portion located on the winding end side of the coil accommodates a lead-out groove for leading out a lead wire on the winding end side of the coil, and a connecting portion between the lead wire on the winding end side and a lead wire connected to the lead wire. A cylindrical accommodating portion for holding the lead wire, a hook-shaped retaining portion for locking the lead wire irremovably, and a winding wire at the time of connecting the lead wire and the lead wire on the winding end side. It is characterized in that a relaxation preventing portion for preventing the coil from relaxing is formed.

Further, the accommodating portion is formed into a tubular shape by opening an opening portion on one end side and forming a tapered insertion hole on the other end side to form a tubular shape. A notch is formed so as to be able to communicate with the hole.

Further, the retaining portion is a hook-shaped guide groove having a lead wire insertion portion at one end of the collar portion, and the lead wire is irremovably locked at the end portion of the guide groove. It is characterized in that it is configured to include a locking projection for.

The retaining portion is a hook-shaped guide groove having a lead wire insertion portion at one end of the collar portion, and the lead wire is irremovably locked at the end portion of the guide groove. It is characterized in that it is configured by including a serrated engaging portion for performing the operation.

Further, the guide groove is characterized in that a narrow portion having a width dimension narrower than an outer dimension of the lead wire is formed on the end portion side thereof.

Further, the relaxation preventing portion is constituted by a fan-shaped winding portion, an obtuse shallow groove portion having a shallow depth dimension, and an acute-angle deep groove portion having a deep depth dimension. And

Further, the slack prevention portion is composed of a plurality of lead-out passages for inserting lead-out wires on the winding end side led out from the lead-out grooves, and a plurality of acute-angled groove portions for locking the lead-out wires in the lead-out passages. It is characterized by comprising a locking portion.

According to the present invention, the lead wire on the winding start side of the coil wound around the coil bobbin is led out to the opening side of the accommodating portion by using the lead-out passage formed in the collar portion located on the winding start side. The lead wire on the winding end side of the coil is led to the loosening prevention part formed on the collar part on the winding end side, in the state of being wrapped around it, or in the locked state, to the opening side of the housing part, Subsequently, the lead wires are connected to the lead wires inserted in the tapered insertion holes formed in the accommodating portion and accommodated in the accommodating portion, and then the lead wires are engaged with the hook-shaped retaining portion. Since the retaining projections or the serrated engagement portions are used for non-removable engagement, the work of connecting the lead wire and each lead wire of the coil reduces the number of work steps, In addition, the workability can be improved quickly and easily.

[0019]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to FIG.
8 to FIG. In FIGS. 1 and 2, 21 indicates a coil bobbin of the present invention, and the coil bobbin 21
Includes a hollow winding drum 23 around which the coil 22 is wound, and a pair of collar portions 24 and 25 integrally formed with the winding drum 23 at both axial ends of the winding drum 23. Has been done.

Of the pair of collar portions 24 and 25, the collar portion 24 located on the winding start side of the coil 22 has a lead wire 22s on the winding start side of the coil 22, as shown in FIGS.
As shown in FIGS. 2 and 4, a lead-out passage 26 is formed for leading out (see FIG. 7) to a housing portion described later, and the collar portion 25 located on the winding end side of the coil 22 is shown in FIGS. ,
An acute-angled V-shaped lead-out groove 28 for leading out the lead wire 22e (see FIG. 8) on the winding end side of the coil 22 to a housing portion described later is formed. The lead-out portion of the lead wire 22s and the open end of the lead-out groove 28 in the lead-out passage 26 are rounded by rounding the corners as shown in FIGS. Each leader line 22
It is possible to reliably prevent disconnection due to the contact of s and 22e with these portions.

1 to 4, reference numeral 29 is a coil 22 formed in the collar portion 24 so as to be connected to the lead-out passage 26.
Is a rectangular tubular accommodating portion for accommodating a connecting portion (see FIG. 7) between the lead wire 22s on the winding start side and the lead wire 31s connected to a power source or the like, and 30 is led to the collar portion 25. Groove 2
8 is a rectangular tube-shaped accommodating portion for accommodating a connecting portion (see FIG. 8) between the lead wire 22e on the winding end side of the coil 22 and the lead wire 31e connected to a power source or the like, which is formed in the vicinity of 8. .

An opening 32 is opened at one end of each of the accommodating portions 29 and 30, and at the other end, as shown in FIGS. One opening 33a opened to the lead wires 31s, 31e
The diameter of the wire is slightly larger than the wire diameter (diameter), and the opening 33b of the other side is larger than the opening 33a of the other side, and the insertion holes 33 are formed in a tapered shape. Reference numerals 29a and 30a are V-shaped notches for leading the lead wires 31s and 31e, which are formed so as to be able to communicate with the insertion hole 33.

Reference numeral 34 denotes a retaining portion formed in the widthwise central portion on the upper side of the collar portions 24 and 25, in the vicinity of the accommodating portions 29 and 30, and as shown in FIG. 5, the upper end portions of the collar portions 24 and 25. A guide groove 34b formed by opening the insertion portion 34a of the lead wire 31s, 31e into a hook shape, and a pair of guide grooves 34b for locking the lead wire 31s, 31e irremovably at the end portion of the guide groove 34b. The locking projections 34c and 34c are provided.

Collar portions 24, 25 of the hook-shaped guide groove 34b.
As shown in FIGS. 3, 4 and 5 (b), the horizontal portion parallel to the upper end portion is gradually narrowed from the insertion portion 34a side toward the terminal portion side (the narrowest portion is the lead wire 31s). , 31e), and the locking projections 34c, 34c can easily insert the lead wires 31s, 31e into the end portions of the guide grooves 34b, and In order to prevent the terminal from being pulled out, the locking protrusion 34 is moved toward the terminal.
It is formed so that the interval between c and 34c becomes narrow.

As shown in FIG. 6, the locking projection 3
Instead of 4c and 34c, serrated locking portions 35 and 35 are formed, and lead wires 31s and 31e are provided between the locking portions 35 and 35.
The lead wires 31 s and 31 e may be irremovably locked at the end portion of the guide groove 34 b by sandwiching.

In FIGS. 1, 2 and 4, 36 is a coil 22.
Is a loosening prevention portion formed in a corner portion intermediate between the removal preventing portion 34 on the upper side of the collar portion 25 located on the winding end side and the lead-out groove 28, and is a fan-shaped winding portion 36a and the winding portion 36a. Stopping portion 34
Shallow obtuse shallow groove 36b having a shallow depth formed between
And an acute-angled deep groove portion 36c having a deep depth formed between the winding portion 36a and the lead-out groove 28. At the end of the winding process of the coil 22, the coil 22 is formed.
The coil 22 is loosened when the lead wires 31s and 31e are connected to the lead wires 22s and 22e of the coil 22 by winding the lead wire 22e on the winding end side halfway around the loosening prevention portion 36. Prevent the.

Next, referring to FIGS. 7 and 8, the coil bobbin 21
After winding the coil 22 around the winding drum 23 of the
Lead wires 22s, 22e and lead wires 31s, 31
The case of connecting e and e will be described. The lead wire 22s on the winding start side of the coil 22 is led out to the opening 32 side of the housing portion 29 using the lead-out passage 26 as shown in FIG. Side leader line 2
As shown in FIG. 8A, 2e is drawn out toward the opening 32 side of the housing portion 30 while being wound around the loosening prevention portion 36 formed on the collar portion 25 during its withdrawal.

When the lead wires 31s and 31e and the lead wires 22s and 22e of the coil 22 are connected,
First, as shown in FIGS. 7 (a) and 8 (a), the tip end side (core wire side) of the lead wires 31s, 31e is placed in the housing portion 2
It is inserted into an insertion hole 33 formed on the other end side of 9, 9 to allow the accommodating portions 29, 30 to pass therethrough, and is projected from an opening 32 opened at one end. At this time, since the insertion holes 33 of the accommodating portions 29 and 30 are formed in a tapered shape, the lead wires 31s and 31e can be easily inserted.

Next, as shown in FIGS. 7 (a) and 8 (a), the tip portions (core wire portions) of the lead wires 31s and 31e projected from the openings 32 of the accommodating portions 29 and 30 are
Each lead wire 22s, 22e of the coil 22 led out to each opening 32, 32 side of the housing portion 29, 30 is wound a predetermined number of times, and in this state, soldering is applied to the bulge portion 37.
(See FIGS. 7B and 8B).

At this time, since the lead wire 22e on the winding end side of the coil 22 is wound around the loosening prevention portion 36 formed in the collar portion 25 in the middle thereof and is drawn out in a tensioned state, It is possible to satisfactorily prevent loosening of 22. In addition, since the relaxation prevention portion 36 has the groove portions 36b and 36c for passing the lead wire 22e on the winding end side formed with different depths, when the lead wire 22e and the lead wire 31e are connected, It is possible to prevent the lead wires 22e from breaking due to the lead wires 22e wound around the hanging portions 36a being worn against each other.

The bulging portion 37 formed at the connecting portion between the lead wires 31s and 31e and the lead wires 22s and 22e.
For example, as shown in FIGS. 7 (b) and 8 (b), the lead wire 31s, 31e is formed so as to become wider toward the rear end (covering portion side) from the tip of the core wire portion,
The rear end side is formed with a diameter slightly larger than the diameter dimension of one opening 33a of the insertion hole 33. In addition, the length dimension of each lead wire 22 s, 22 e of the coil 22 is the same as the lead wire 31.
It is wound around and connected to the core wire portion of s, 31e to receive the housing portion 29, 30.
Set the length so that no excessive tensile stress is applied when it is stored in.

Thereafter, by pulling the lead wires 31s and 31e inserted through the insertion hole 33, the bulging portion 3 is formed.
The rear end side of 7 is retracted to a position corresponding to one opening 33a of the insertion hole 33. At this time, as described above, the rear end side of the bulging portion 37 has one opening 33 of the insertion hole 33.
Since it is formed with a diameter slightly larger than the diameter of a,
The rear end side of the bulging portion 37 contacts the inner wall surface of the housing portion 29, 30 at the peripheral edge of the one opening 33a of the insertion hole 33 to prevent the lead wires 31s, 31e from being pulled out from the insertion hole 33. , Lead wires 31s and 31e and lead wires 22s and 22e
It is possible to alleviate the burden on the connection portion with and the lead wires 22s and 22e themselves, and to reliably prevent the lead wires 22s and 22e from being broken.

Then, as described above, the rear end side of the bulging portion 37 is retracted to a position corresponding to one opening 33a of the insertion hole 33, and the rear end side of the bulging portion 37 is accommodated in the accommodating portion 29 ,. Thirty
When the inner wall surface is brought into contact with the lead wire 31, the notch portions 29a and 30a formed so as to communicate with the insertion hole 33 are used.
With the s and 31e being bent obliquely upward, the retaining portion 34
Side, and the insertion portion 34 of the retaining portion 34 in which the lead wires 31s and 31e are opened to the upper side of the collar portions 24 and 25.
By inserting it from a into the guide groove 34b, and locking it irremovably with locking projections 34c, 34c (or serrated locking parts 35, 35) at the end of the guide groove 34b (Fig. 5 (a) and FIG. 6 (a)), the work of connecting the lead wires 22s and 22e of the coil 22 and the lead wires 31s and 31e is completed.

The guide groove 34b of the retaining portion 34 is
As shown in FIGS. 3, 4 and 5 (b) and 6 (b), the width is gradually narrowed toward the terminal portion side, and the width dimension of the narrowest portion is the lead wire 31s,
Since the outer diameter dimension of the lead wire 31e is smaller than that of the lead wire 31e, even if the locking by the locking projections 34c, 34c (or the serrated locking parts 35, 35) of the lead wires 31s, 31e is released, Due to the presence of the narrow portion of the guide groove 34b, it is possible to favorably prevent the lead wires 31s and 31e from coming off the guide groove 34b.

As described above, in the present invention, the lead wire 22e on the winding end side of the coil 22 is wound around the loosening prevention portion 36 formed on the collar portion 25 in the middle of the drawing, and the tension state is maintained. By deriving it, it becomes possible to reliably prevent the coil 22 from becoming loose from the winding end side of the coil 22 when the lead wire 22e and the lead wire 31e are connected, and moreover, the loosening of the lead wire 22e. The work of winding around the prevention portion 36 can be performed by the winding machine in the winding process of the coil 22, so that it is possible to contribute to a reduction in the number of steps.

In addition, the loosening prevention portion 36 has the winding portion 3
Since the groove portions 36b and 36c provided on the periphery of 6a are formed with different depths, the lead wire 22e and the lead wire 31 are formed.
At the time of connection with e, it is possible to favorably prevent the lead wires 22e wound around the winding portion 36a from being worn and broken.

The lead wires 31s and 31e are connected to the collar 2
Inserted into the guide groove 34b from the insertion portion 34a of the retaining portion 34 opened at 4, 25, and at the end portion of the guide groove 34b are the locking projections 34c, 34c or the serrated locking portion 3
Since it is configured such that the lead wires 31s and 31e are locked to the pull-out preventing portion 34 with 5, 35, the work for locking the lead wires 31s and 31e to the pull-out preventing portion 34 can be performed quickly and easily. In addition, the guide groove 34b
Becomes narrower toward the terminal side,
Since the width dimension of the narrowest part is made narrower than the outer diameter dimension of the lead wires 31s and 31e, the lead wire 3
Even if the 1s and 31e are released from the engagement by the engagement protrusions 34c and 34c or the serrated engagement portions 35 and 35, the lead wires 31s and 31e are not connected to the guide groove 3
It is possible to reliably prevent it from coming off from 4b.

Moreover, when the lead wires 31s and 31e are inserted into the insertion holes 33 formed in the accommodating portions 29 and 30,
Since the insertion hole 33 is formed in a tapered shape, it can be inserted smoothly and satisfactorily.

Further, in the present invention, the lead wires 31s,
31e and the lead wires 22s and 22e of the coil 22 are
It is accommodated in the accommodating parts 29 and 30 from different directions,
The rear end side of the bulging portion 37 is provided with one opening 33a of the insertion hole 33.
The retaining effect due to the larger diameter, and the housing portion 2
Cutouts 29a, 30a and retaining portions 3 formed in 9, 30
Due to the wedge action at 4, 34, the lead wire 31
Since it is possible to prevent s and 31e from coming off from the accommodating portions 29 and 30, and to prevent the lead wires 22s and 22e of the coil 22 from being subjected to an excessive tensile stress, as a result, It is possible to reliably prevent the wires 22s and 22e from breaking.

Next, a second embodiment of the present invention will be described with reference to FIGS. The difference between the first embodiment and the second embodiment is the shape of the loosening prevention portion formed on the collar portion 25 on the winding end side of the coil 22. Since the second embodiment is the same as the first embodiment except for the collar portion 25 on the winding end side, only the collar portion 25 will be illustrated and described.

9 and 10, reference numeral 40 denotes a loosening prevention portion provided on the collar portion 25 on the winding end side of the coil 22, which is connected to the accommodating portion 30 and also has a collar portion 25.
A lead-out passage 41 for inserting a lead-out wire 22e (not shown in FIGS. 9 and 10) drawn out from a sharp V-shaped lead-out groove 28 formed on the lower end side, and the lead-out passage 4
In the middle of 1, the sharp V-shaped groove portion for locking the lead wire 22e formed at, for example, two places (see FIG. 1).
0)). The lead-out groove 28 is not limited to the position shown in FIG. 9, and may be formed at a position close to the lead-out passage 41, such as the lower end portion of the collar portion 25 or a corner portion on the lower end side. .

When the lead wire 22e on the winding end side of the coil 22 is to be led out to the housing portion 30 side, first, the lead wire 22e is locked in the lead groove 28 in the middle thereof, and the lead passage 41 is provided. Then, the lead wire 22e is inserted into the lead-out passage 41, and the lead-out wire 22e is led out to the housing portion 30 side while being locked by the engaging portion 42 formed in the lead-out passage 41.

As described above, in the second embodiment, the lead wire 22e on the winding end side of the coil 22 has an acute V-shaped lead-out groove 28 and an acute V-shaped lead-out groove provided in the lead-out passage 41. The housing portion 30 is locked by the locking portion 42 formed of a groove.
Since the coil 22 is prevented from being loosened, the connection work between the lead wire 22e and the lead wire 31e (not shown in FIGS. 9 and 10) can be smoothly and favorably carried out. Can be done.

In the present invention, the accommodating portions 29, 3
In order to obtain the retaining effect of the lead wires 31s and 31e at 0, the bulging portion 37 is described as an example in which it is formed in a divergent shape from the front end side to the rear end side of the core wire portion of the lead wires 31s and 31e. However, the present invention is not limited to this, and for example, the bulging portion is formed with a diameter dimension slightly larger than one opening of the insertion hole and is formed uniformly from the front end side to the rear end side of the core wire portion of the lead wire. A retaining member having a diameter slightly larger than one opening of the insertion hole may be fitted to the rear end side of the core portion of the lead wire to obtain the retaining effect of the lead wire in the accommodating portion. Good.

[0045]

Since the present invention is constructed as described above, it has the following effects.

(1) The lead wire on the winding end side of the coil is wound around the loosening prevention portion formed on the flange portion on the winding end side in the drawing while maintaining tension, or
By locking and leading out to the housing portion side, it becomes possible to reliably prevent loosening of the coil when the lead wire on the winding end side and the lead wire are connected. Moreover, the work of winding the leader wire around the relaxation prevention portion can be performed by a winding machine in the coil winding process, and the work of locking the leader wire to the relaxation prevention portion can be performed with the leader wire. Since it can be easily done before connecting with the lead wire, there is no need for prior work such as attaching an adhesive tape to the winding outer peripheral surface of the coil as in the past, and as a result, the number of manufacturing steps can be improved. It becomes possible to reduce.

(2) Moreover, since the loosening prevention portion in the first embodiment is formed to have the fan-shaped winding portion,
By winding the lead wire around the winding part , the coil
It is possible to prevent it from loosening satisfactorily and to reliably prevent the leader wire from being pulled out toward the tip of the winding part .
Moreover, since the groove portions provided on the periphery of the winding portion are formed to have different depths, the lead wires wound around the winding portion are worn and broken , or the coil is loosened.
You can certainly prevent the problem .

(3) Further, when connecting each lead wire of the coil and the lead wire, when the lead wire is inserted into the insertion hole formed on the other end side of the accommodating portion, the insertion hole is tapered. Since it is formed on the lead wire, the lead wire insertion work can be performed smoothly and satisfactorily, and
And the lead wire, the lead wire is pulled out from the housing.
The lead wire can be properly prevented from coming off, and the lead wire uses the hook-shaped guide groove of the retaining portion formed in each collar portion to make a locking protrusion or a sawtooth shape at its end portion. Since it is configured to be irremovably locked by the locking portion, it is possible to improve work efficiency satisfactorily as compared with the related art.

(4) Moreover, the guide groove is designed so that the width dimension thereof becomes narrower toward the end portion side, and the width dimension of the narrowest portion is narrower than the outer diameter dimension of the lead wire. Should the lead wire have a locking protrusion, or
Even when the engagement by the serrated engagement portion is released, the lead wire can be effectively prevented from being pulled out from the guide groove.

(5) Further, since the lead wire and each lead wire of the coil are accommodated in the accommodating portion from different directions, the lead wire is adjusted in the number of windings as necessary as in the conventional case. It is sufficient to cut and wind and connect in advance the length required for wrapping the lead wire around the core wire, and the rear end of the bulging part formed at the connection part with the lead wire. Since the side is formed so as to have a diameter larger than the diameter of one opening of the insertion hole through which the lead wire is inserted, it is possible to prevent the lead wire from being removed from the insertion hole. It is possible to reliably prevent the occurrence of the problem that a tensile stress is applied unnecessarily to each lead wire that is cut in the length dimension required to wind the core wire portion and breaks the lead wire.

[Brief description of drawings]

FIG. 1 is a perspective view showing a coil bobbin of the present invention.

FIG. 2 is also a perspective view showing a coil bobbin of the present invention.

FIG. 3 is an enlarged view showing a main part of a coil bobbin of the present invention by cutting out.

FIG. 4 is likewise an enlarged view showing a main part of the coil bobbin of the present invention by cutting out.

5A is an enlarged view of a P portion in FIG. 3, and FIG. 5B is an enlarged perspective view of a retaining portion.

6 (a) is an enlarged view showing another structure of a P part in FIG.
FIG. 6B is an enlarged perspective view showing another structure of the retaining portion.

FIG. 7 is an explanatory diagram for explaining a connecting operation between a lead wire and a lead wire on a winding start side of a coil.

FIG. 8 is an explanatory diagram for explaining a connecting operation between a lead wire and a lead wire on a winding end side of a coil.

FIG. 9 is a perspective view showing a second embodiment of the present invention.

FIG. 10 is likewise a vertical cross-sectional view showing the main parts of the second embodiment.

FIG. 11 is a perspective view showing a conventional coil bobbin.

FIG. 12 is also a perspective view showing a conventional coil bobbin.

FIG. 13 is an explanatory diagram for explaining a conventional connecting operation between a lead wire on the winding start side and a lead wire.

FIG. 14 is an explanatory diagram for explaining a conventional connecting operation between the lead wire and the lead wire on the winding end side.

[Explanation of symbols]

21 coil bobbin 22 coils 22s, 22e Leader wire 24,25 collar part 26 Outlet passage 28 Outlet groove 29,30 Housing 31s, 31e Lead wire 33 insertion hole 34 retaining part 34c Locking protrusion 35 Locking part 36, 40 Relaxation prevention part 36a Winding part 36b shallow groove 36c deep groove 37 bulge 41 Outlet passage 42 Locking part

Continuation of the front page (56) References JP 10-56748 (JP, A) JP 62-18957 (JP, A) Actual opening 2-83644 (JP, U) Actual opening 50-20103 (JP , U) Actual development 63-82908 (JP, U) Actual development 55-88211 (JP, U) (58) Fields investigated (Int.Cl. ⁷ , DB name) H02K 3/46 H01F 5/02 H01F 27/28

Claims (3)

(57) [Claims] 1. A coil bobbin comprising a hollow winding drum around which a coil is wound and a pair of flange portions integrally formed with the winding drum at both ends of the winding drum.
In the collar portion located on the winding start side of the coil, a lead-out passage for leading out the lead wire on the winding start side of the coil, and this lead-out passage
A cylindrical accommodating portion for accommodating a connecting portion of the lead wire on the winding start side formed on the upper side of the winding wire and a lead wire connected to the lead wire, and a connecting portion connected to the lead wire on the winding start side. Income
The lead wire was pulled out impossible housed Description section and a hook-shaped retaining portion for pulling out impossible locking, the flange portion located at the winding end side of the coil, winding end side of the coil and deriving a groove for deriving a lead line of the form to a position close this derivation groove
A tubular accommodating portion for accommodating a connection portion between the formed lead wire on the winding end side and a lead wire connected to the lead wire ;
Connected to the lead wire on the rear side
A hook-shaped retaining portion for locking the lead wire irremovably housed irremovably, and a fan at the upper end of the collar portion.
-Shaped wrapping part, shallow obtuse-shaped shallow groove part with shallow depth,
And a loosening prevention portion formed to prevent the coil wound around the winding drum from loosening when the lead wire on the winding end side and the lead wire are connected to each other.
A coil bobbin for electrical equipment, which is characterized by being configured as follows. 2. A housing for accommodating the connecting portion between the lead wire and the lead wire.
The accommodating portion is formed into a tubular shape by opening an opening on one end side and forming a tapered insertion hole on the other end side to prevent the connection part from being pulled out. Tapered insertion hole end
Is formed with a notch portion for locking the lead wire led out from the insertion hole, and the retaining portion for locking the lead wire is a collar portion.
A hook-shaped design with a lead wire insertion part at one end
Do not pull out the lead wire from the inner groove and the end of the guide groove.
The coil bobbin for an electric device according to claim 1, wherein the coil bobbin is provided with a locking projection for effectively locking . 3. The retaining portion for locking the lead wire is a collar portion.
A hook-shaped design with a lead wire insertion part at one end
Do not pull out the lead wire from the inner groove and the end of the guide groove.
And a saw-toothed locking portion for effectively locking
The coil bobbin for electrical equipment according to claim 1 or 2, characterized in that .