JP2024118740A - Magnet Wire Splicing Machine - Google Patents

Abstract

[Problem] To provide a magnet wire connection device that can reduce the number of parts of a contact electrically connected to a magnet wire and improve the workability of connecting the magnet wire. [Solution] The magnet wire connection device 1 includes a contact 11 and a first housing 12. The contact 11 has a pressure contact portion 16 having a slit blade 16a that is pressure-contacted to a magnet wire 100, and a holding portion 17 having an insertion groove 17a for the magnet wire 100 and sandwiching and holding the magnet wire 100 from both sides. The pressure contact portion 16 and the holding portion 17 are provided integrally. The holding portions 17 are provided in a pair and are arranged on both sides of the pressure contact portion 16. The magnet wire 100 held by the pair of holding portions 17 of the contact 11 held by the first housing 12 is relatively displaced along the insertion groove 17a, so that the magnet wire 100 is inserted into the slit blade 16a of the pressure contact portion 16, and the pressure contact portion 16 is pressure-contacted to the magnet wire 100. [Selected Figure] Fig. 11

Description

The present invention relates to a magnet wire connection device that electrically connects to a magnet wire that is configured as an electric wire including a core wire and an enamel coating surrounding the core wire.

Conventionally, magnet wires, which are configured as electric wires including a core wire and an enamel coating around the core wire, have been used as windings for electric devices such as electric motors or resolvers. When an electric device such as an electric motor or resolver is connected to another device, a magnet wire connection device that is electrically connected to the magnet wire is required. For example, the connector 1 disclosed in Patent Document 1 is known as an example of a magnet wire connection device that is electrically connected to such a magnet wire.

The connector 1 as a magnet wire connection device disclosed in Patent Document 1 is configured to be electrically connected to a coil winding 40 as a magnet wire. The connector 1 is configured to include a housing 10 formed of an insulating material, and a metal terminal member 20 and an elastic member 30 as contacts that are electrically connected to the coil winding 40. The housing 10 is configured as a part of the housing of an electric motor, for example.

When the connector 1 as a magnet wire connection device and the coil winding 40 as a magnet wire are connected, the coil winding 40 is first inserted and positioned in the housing 10. The housing 10 is provided with a columnar portion 11 for winding the tip of the coil winding 40. When the coil winding 40 is inserted and positioned in the housing 10, the tip of the coil winding 40 is wound around the columnar portion 11 of the housing 10 and held in the housing 10. Then, with the tip of the coil winding 40 held by the columnar portion 11, the terminal member 20 is inserted into the housing 10. The terminal member 20 is provided with a contact surface 21 on which serrations 23 are formed, and the terminal member 20 is inserted into the housing 10 with the contact surface 21 facing the coil winding 40 side.

When the terminal member 20 is inserted into the housing 10, the elastic member 30 is then inserted into the housing 10. The elastic member 30 is provided with a pressing portion 32 that elastically deforms and presses the terminal member 20 when inserted into the housing 10. When the elastic member 30 is inserted into the housing 10, the pressing portion 32 that has elastically deformed presses the terminal member 20, causing the serrations 23 formed on the contact surface 21 of the terminal member 20 to break through the enamel coating of the coil winding 40, and the terminal member 20 and the coil winding 40 are electrically connected. In this way, the connector 1 as a magnet wire connection device disclosed in Patent Document 1 is electrically connected to the coil winding 40 as a magnet wire.

Patent No. 7102134 specification

According to the magnet wire connection device disclosed in Patent Document 1, a metal terminal member 20 is inserted into a housing 10 with the contact surface 21 on which the serrations 23 are formed facing the coil winding 40, and then a metal elastic member 30 is inserted into the housing 10. Then, the pressing portion 32 of the elastic member 30 elastically deforms and presses the terminal member 20, so that the serrations 23 break through the enamel coating of the coil winding 40, and the terminal member 20 is electrically connected to the coil winding 40. Therefore, according to the magnet wire connection device of Patent Document 1, in order to configure a contact that is electrically connected to the coil winding as a magnet wire, a metal terminal member 20 provided with serrations 23 and a metal elastic member 30 that is provided as a separate member independent of the terminal member 20 and presses the terminal member 20 by elastic deformation are required. This leads to an increase in the number of parts of the contact that is electrically connected to the magnet wire.

In addition, according to the magnet wire connection device disclosed in Patent Document 1, when the terminal member 20 and the elastic member 30 are inserted into the housing 10 to electrically connect to the coil winding 40, it is necessary to stably contact the coil winding 40 and the terminal member 20 while holding the coil winding 40. For this reason, in the magnet wire connection device of Patent Document 1, it is necessary to insert and arrange the coil winding 40 in the housing 10, and then wind the tip of the coil winding 40 around the columnar portion 11 of the housing 10 to hold it in the housing 10. That is, in the magnet wire connection device of Patent Document 1, it is necessary to wind the tip of the coil winding 40 around the columnar portion 11 and hold it. This leads to a decrease in the workability of electrically connecting the magnet wire connection device to the coil winding 40 as a magnet wire.

In consideration of the above-mentioned circumstances, the present invention aims to provide a magnet wire connection device that can reduce the number of contact parts that are electrically connected to the magnet wire and improve the workability of the work of electrically connecting to the magnet wire.

(1) In order to achieve the above object, one aspect of the present invention relates to a magnet wire connection device that is electrically connected to a magnet wire configured as an electric wire including a core wire and an enamel coating surrounding the core wire. The magnet wire connection device according to one aspect of the present invention includes a contact electrically connected to the magnet wire and a first housing that holds the contact, the contact has a pressure contact portion that has a slit blade that cuts through the enamel coating and is pressed against the magnet wire, and a holding portion that has an insertion groove through which the magnet wire is inserted and holds the magnet wire by sandwiching the magnet wire inserted into the insertion groove from both sides, the pressure contact portion and the holding portion of the contact are integrally provided, the holding portions are provided in pairs and are arranged on both sides of the pressure contact portion in the direction in which the magnet wire that is pressed against the contact by the pressure contact portion extends, and the magnet wire held by the pair of holding portions on the contact held by the first housing is inserted into the slit blade of the pressure contact portion by sliding along the insertion groove and being displaced relative to the pair of holding portions, the slit blade cuts through the enamel coating and bites into the magnet wire, and the pressure contact portion is pressed against the magnet wire.

According to this configuration, the magnet wire can be held by the contacts by inserting the magnet wire into the insertion grooves of the pair of holding parts in the contacts held in the first housing and sandwiching the magnet wire between the holding parts. Furthermore, while the magnet wire is held by the contacts, the magnet wire can be inserted into the slit blade of the pressure-welding part arranged between the pair of holding parts by sliding the magnet wire along the insertion groove and displacing it relative to the pair of holding parts. Then, by inserting the magnet wire into the slit blade, the enamel coating can be broken by the slit blade and the slit blade can be inserted into the magnet wire to press the pressure-welding part against the magnet wire. Therefore, according to the above configuration, the magnet wire can be easily electrically connected to the magnet wire by inserting the magnet wire into the pair of holding parts and holding it, and further by displacing the magnet wire relative to the pair of holding parts while sliding it. Therefore, the workability of the work of electrically connecting the magnet wire connection device to the magnet wire can be improved. In other words, there is no need for the cumbersome and time-consuming task of winding and holding the magnet wire around the columnar portion of the housing as disclosed in Patent Document 1, and the workability of electrically connecting the magnet wire connection device to the magnet wire can be improved.

In addition, according to the above configuration, the contact has a pressure-welding portion that is pressed against the magnet wire, and a pair of holding portions that are disposed on either side of the pressure-welding portion and hold the magnet wire during pressure-welding. This allows the contact that holds the magnet wire and is pressed against the magnet wire while still holding the magnet wire to be made from a single component. This allows the number of components in the contact that are electrically connected to the magnet wire to be reduced.

Therefore, with the above configuration, it is possible to provide a magnet wire connection device that can reduce the number of contact parts that are electrically connected to the magnet wire and improve the workability of the work of electrically connecting to the magnet wire.

(2) The holding portion may have a pair of arms extending in a cantilevered manner, the insertion groove may be formed as a gap between the pair of arms, and the holding portion may hold the magnet wire by sandwiching the magnet wire between the pair of arms from both sides.

This configuration forms an insertion groove through which the magnet wire is inserted, and the structure of the holding section that holds the magnet wire by sandwiching it from both sides can be easily configured with a simple structure that has a pair of arms extending in a cantilever shape.

(3) The connector may further include a second housing that is connected to the first housing by fitting, and the first housing is configured to be connected to the second housing by fitting, with the contacts held by the first housing holding the magnet wire with the pair of holding parts. When the first housing and the second housing are fitted together, the magnet wire held by the pair of holding parts is biased by the second housing and displaced relative to the pair of holding parts while sliding against the insertion groove, so that the magnet wire is inserted into the slit blade of the pressure contact part, and the slit blade cuts through the enamel coating and bites into the magnet wire, and the pressure contact part is pressed against the magnet wire.

According to this configuration, the first housing and the second housing are fitted together in a state where the contact held by the first housing holds the magnet wire with a pair of holding parts. Then, by fitting the first housing and the second housing together, the magnet wire is biased by the second housing, and the magnet wire is slid along the insertion groove to be displaced relative to the pair of holding parts, and the magnet wire can be inserted into the slit blade of the pressure-welding part arranged between the pair of holding parts. Furthermore, by inserting the magnet wire into the slit blade, the enamel coating can be broken by the slit blade, and the slit blade can be inserted into the magnet wire to press the pressure-welding part against the magnet wire. Therefore, according to the above configuration, the magnet wire is inserted and held in the pair of holding parts of the contact held by the first housing, and further, the first housing and the second housing are fitted together, so that the work of electrically connecting the magnet wire connection device to the magnet wire can be performed even more easily. Therefore, the workability of the work of electrically connecting the magnet wire connection device to the magnet wire can be further improved.

(4) The second housing may be provided with an abutment portion that abuts against the magnet wire held by the pair of holding portions when the second housing and the first housing are fitted together, and the abutment portion may be configured to abut against and bias the magnet wire held by the pair of holding portions when the second housing and the first housing are fitted together, thereby displacing the magnet wire relative to the pair of holding portions.

With this configuration, the structure for biasing the magnet wire when the first housing and the second housing are mated can be easily constructed with a simple structure in which an abutment portion that abuts against the magnet wire is provided on the second housing.

(5) The contact portion may be provided with a fitting groove into which the magnet wire fits.

According to this configuration, a fitting groove into which the magnet wire fits is provided in the contact portion that contacts and biases the magnet wire when the first housing and the second housing are fitted together, so that the magnet wire can be biased in a stably supported state. Therefore, according to this configuration, by biasing the magnet wire at the contact portion when the first housing and the second housing are fitted together, the magnet wire can be displaced relative to the pair of holding portions and the operation of inserting it into the slit blades of the pressure contact portion can be performed accurately and stably.

(6) The first housing and the second housing may be configured to cover the tip of the magnet wire held in the holding portion from both sides when fitted together.

According to this configuration, when the first housing and the second housing are engaged, the tip of the magnet wire held in the holding portion is covered by being sandwiched from both sides. Therefore, when the first housing and the second housing are engaged and the magnet wire connection device is connected to the magnet wire, it is possible to prevent the fracture surface of the tip of the magnet wire from being exposed to the outside of the magnet connection device. Since it is possible to prevent the fracture surface of the tip of the magnet wire from being exposed to the outside, it is possible to prevent a short circuit from occurring at the tip of the magnet wire.

The present invention provides a magnet wire connection device that can reduce the number of contact parts that are electrically connected to the magnet wire and improve the workability of electrically connecting to the magnet wire.

1 is a perspective view showing a magnet wire connection device according to a first embodiment of the present invention; FIG. 2 is an exploded perspective view of the magnet wire connection device. FIG. 2 is an enlarged perspective view showing a contact in the magnet wire connection device. FIG. 4A is a perspective view showing a first housing in a magnet wire connection device, and FIG. 4B is a perspective view showing a state in which contacts are held in the first housing. FIG. 4 is a perspective view showing a state in which contacts are held in a first housing. FIG. 6(A) is a perspective view showing a state in which a magnet wire is held by a contact, and FIG. 6(B) is a perspective view showing a state in which the contact is pressed against the magnet wire. 11 is a perspective view showing a state in which a magnet wire is held in a contact held in a first housing. FIG. 8A and 8B are perspective views showing a second housing in a magnet wire connection device. FIG. 9 is an enlarged view of a portion of the second housing shown in FIG. 8(B). Figure 10(A) is a front view of a magnet wire connection device, showing the state in which the first housing and the second housing are connected by fitting, and Figure 10(B) is an enlarged view of a portion of Figure 10(A). FIG. 11(A) is a cross-sectional view of the magnet wire connection device taken along the line AA in FIG. 10(A), and FIG. 11(B) is an enlarged view of a portion of FIG. 11(A). FIG. 11 is a perspective view showing a magnet wire connection device according to a second embodiment of the present invention. FIG. 2 is an exploded perspective view of the magnet wire connection device. FIG. 2 is an enlarged perspective view showing a contact in the magnet wire connection device. 1 is a perspective view showing a state in which contacts are held in a first housing in a magnet wire connection device; FIG. FIG. 16(A) is a perspective view showing a state in which a magnet wire is held by a contact, and FIG. 16(B) is a perspective view showing a state in which the contact is pressed against the magnet wire. 11 is a perspective view showing a state in which a magnet wire is held in a contact held in a first housing. FIG. FIG. 4 is a perspective view showing a second housing in the magnet wire connection device. Figure 19(A) is a front view of a magnet wire connection device, showing the state in which the first housing and the second housing are connected by fitting, and Figure 19(B) is an enlarged view of a portion of Figure 19(A). Figure 20(A) is a cross-sectional view of a magnet wire connection device, taken along the line B-B in Figure 19(A), and Figure 20(B) is an enlarged view of a portion of Figure 20(A).

The following describes the embodiments of the present invention with reference to the drawings. The present invention can be widely applied to various uses as a magnet wire connection device that is electrically connected to a magnet wire that is configured as an electric wire including a core wire and an enamel coating surrounding the core wire. The following describes magnet wire connection devices according to the first and second embodiments of the present invention.

In the following description, for convenience, the up-down direction, the front-back direction, and the left-right direction of the magnet wire connection device are defined as shown by double-headed arrows in the drawings. The up-down direction is configured as a direction parallel to the direction in which a first housing and a second housing of the magnet wire connection device, which will be described later, are connected by fitting. The up-down direction also constitutes a direction parallel to the direction in which a contact, which will be described later, is inserted into the first housing of the magnet wire connection device. The front-back direction and the left-right direction are configured as directions perpendicular to the up-down direction, and the front-back direction and the left-right direction are configured as directions perpendicular to each other. The front-back direction is configured as a direction parallel to the direction in which the magnet wire is drawn out from the magnet wire connection device when the magnet wire is connected to the magnet wire connection device. The left-right direction is configured as a direction parallel to the direction in which the multiple contacts held in the first housing of the magnet wire connection device are arranged side by side in the first housing.

[First embodiment]
(Outline of magnet wire connection device)
Fig. 1 is a perspective view showing a magnet wire connection device 1 according to a first embodiment of the present invention. Fig. 2 is an exploded perspective view of the magnet wire connection device 1. Fig. 1 shows a state in which a plurality of magnet wires 100 are connected to the magnet wire connection device 1. Fig. 1 also shows the magnet wires 100 at their end portions that are to be connected to the magnet wire connection device 1.

1 and 2, the magnet wire connection device 1 is configured as a connection device electrically connected to the magnet wire 100. In this embodiment, the magnet wire connection device 1 is configured to be electrically connected to a plurality of magnet wires 100. The magnet wire 100 is provided as a winding of an electric device (not shown) such as an electric motor or a resolver, and is configured as an electric wire including a core wire as a conductor and an enamel coating as an insulator around the core wire. The magnet wire connection device 1 connected to the magnet wire 100 is connected to a mating connector (not shown). The mating connector to which the magnet wire connection device 1 is connected is connected to another device (not shown) to which an electric device such as an electric motor or a resolver in which the magnet wire 100 is used as a winding is electrically connected. By connecting the magnet wire connection device 1 to the mating connector, the electric device such as an electric motor or a resolver is connected to the other device.

The magnet wire connection device 1 is configured to include a plurality of contacts 11, a first housing 12 that holds the plurality of contacts 11, and a second housing 13 that is connected to the first housing 12 by fitting. In this embodiment, the magnet wire connection device 1 is configured to include six contacts 11. Each contact 11 is formed of a metal material having electrical conductivity, and the first housing 12 and the second housing 13 are formed of a resin material having electrical insulation.

Each of the multiple contacts 11 is inserted and held in the first housing 12. Then, with the multiple contacts 11 held in the first housing 12, the multiple magnet wires 100 are held relative to the multiple contacts 11. With each magnet wire 100 held in each contact 11 held in the first housing 12, the first housing 12 is fitted into the second housing 13. In the magnet wire connection device 1, as described below, the first housing 12 and the second housing 13 are connected by fitting, so that each contact 11 is pressed against each magnet wire 100. The first housing 12 and the second housing 13 are fitted and connected, and the magnet wire 100 and the contact 11 are pressed against each other, so that the magnet wire 100 and the magnet wire connection device 1 are electrically connected.

When the magnet wire connection device 1 and the magnet wire 100 are electrically connected, a mating connector (not shown) connected to another device (not shown) connected to an electric device (not shown) such as an electric motor or resolver in which the magnet wire 100 is provided as a winding is fitted and connected to the first housing 12. The first housing 12 and the mating connector are connected by fitting, and the magnet wire connection device 1 and the mating connector are electrically connected. As a result, the electric device such as an electric motor or resolver is connected to the other device via the magnet wire connection device 1 and the mating connector. The second housing 13 in the magnet wire connection device 1 is provided as a part of the casing of the electric device such as an electric motor or resolver in which the magnet wire 100 is provided as a winding, or as a member assembled to the casing. The details of the configuration of the magnet wire connection device 1 will be further explained below.

(contact)
FIG. 3 is an enlarged perspective view of the contact 11 in the magnet wire connection device 1. FIG. 4(A) is a perspective view showing the first housing 12 in the magnet wire connection device 1, and FIG. 4(B) is a perspective view showing a state in which the contact 11 is held in the first housing 12. FIG. 5 is a perspective view showing a state in which the contact 11 is held in the first housing 12. FIG. 6(A) is a perspective view showing a state in which the magnet wire 100 is held in the contact 11, and FIG. 6(B) is a perspective view showing a state in which the contact 11 is pressed against the magnet wire 100. Note that FIG. 3 shows an enlarged view of only one contact 11. In addition, with regard to FIG. 4(B) and FIG. 5, which are perspective views showing a state in which the contact 11 is held in the first housing 12, FIG. 4(B) shows a perspective view from an obliquely upward direction, and FIG. 5 shows a perspective view from an obliquely downward direction.

Referring to Figures 1 to 6, the contact 11 is formed of a metal material such as copper having electrical conductivity, and is provided as a terminal member electrically connected to the magnet wire 100. The contact 11 is configured to be electrically connected to the magnet wire 100 while inserted and held in the first housing 12. The contact 11 is also configured to be electrically connected to a mating contact (not shown) provided in the mating connector when the magnet wire connection device 1 is connected to the mating connector.

Referring to Figures 1 to 6, the contact 11 is configured to include a main body 14, a mating connection portion 15, a number of pressure contact portions 16, and a pair of holding portions 17. The main body 14, the mating connection portion 15, the number of pressure contact portions 16, and the pair of holding portions 17 are integrally provided. The integrally formed contact 11 is formed, for example, by bending the material of the contact 11 cut out by punching a flat metal plate.

Referring to Figures 3 and 6, the main body 14 is provided as a central structural part extending vertically in a columnar shape at the center of the front-rear direction of the contact 11. The upper end portion of the main body 14 extending vertically in a columnar shape is formed in a square tube shape and is configured to be inserted into the first housing 12 from below. The contact 11 is inserted from below from the square tube-shaped part at the upper end of the main body 14 into a retaining hole 19a (described below) in the first housing 12, and is pressed into the retaining hole 19a up to the lower end portion of the main body 14, thereby being retained in the first housing 12 (see Figures 4 and 5).

The upper end of the rectangular cylindrical portion of the main body 14 is configured as the mating connection portion 15. The mating connection portion 15 is configured as an electrical contact portion of the contact 11 that comes into contact with and is electrically connected to a mating contact provided on the mating connector when the magnet wire connection device 1 is connected to the mating connector. The mating connection portion 15 is provided, for example, as a male electrical contact portion, and is configured to fit into and be electrically connected to a female electrical contact portion of the mating contact.

3 and 6, each of the multiple pressure contact portions 16 in the contact 11 has a slit blade 16a that cuts through the enamel coating of the magnet wire 100 and is provided as a portion that is pressure-welded to the magnet wire 100. In the contact 11 of this embodiment, four pressure contact portions 16 are provided as the multiple pressure contact portions 16. The four pressure contact portions 16 are provided in series along the front-rear direction. All four pressure contact portions 16 are provided integrally with the main body portion 14. Of the four pressure contact portions 16 arranged in the front-rear direction, each of the two pressure contact portions 16 on the center side in the front-rear direction is provided integrally with the main body portion 14 at the lower end of the main body portion 14. Also, of the four pressure contact portions 16 arranged in the front-rear direction, each of the two pressure contact portions 16 on both ends in the front-rear direction is connected integrally to the lower end portion of the main body portion 14 via the connecting portion 14a. The connecting portions 14a are provided in a pair, and are provided in the shape of elongated plates that bend and extend from the lower end of the main body 14 to both sides in the front-rear direction. Of the four pressure contact portions 16 aligned in the front-rear direction, two pressure contact portions 16 at both ends in the front-rear direction are connected to each of the pair of connecting portions 14a. The connecting portions 14a are also configured as portions that are pressed into the first housing 12 when the contacts 11 are inserted and held in the holding holes 19a in the first housing 12. The connecting portions 14a are provided with press-fitting claws 14b that are pressed into the inner walls of the holding holes 19a when the connecting portions 14a are inserted into the holding holes 19a of the first housing 12.

Each of the four pressure-connecting portions 16 has a slit blade 16a that cuts through the enamel coating of the magnet wire 100. The slit blade 16a of each pressure-connecting portion 16 has a pair of blades that extend in the vertical direction in approximately parallel relation to each other through a gap. The magnet wire 100 is inserted in the slit that is formed as a gap between the pair of blades in the slit blade 16a of each pressure-connecting portion 16 and extends in the vertical direction while extending in the front-rear direction. The slit of the slit blade 16a of each pressure-connecting portion 16 is configured so that the lower end side is open to the outside. The magnet wire 100 is inserted into the slit of the slit blade 16a by being inserted from the open area on the lower end side. The slit blade 16a of each pressure-connecting portion 16 is configured to cut through the enamel coating of the magnet wire 100 inserted into the slit between the pair of blades with the pair of blades, and to be pressed against the magnet wire 100 by biting into the core wire of the magnet wire 100. When the slit blade 16a of the pressure contact portion 16 is pressed against the magnet wire 100, the contact 11 is electrically and mechanically connected to the magnet wire 100.

3, 5 and 6, the holding portion 17 in the contact 11 is provided with an insertion groove 17a through which the magnet wire 100 is inserted, and is provided as a portion that holds the magnet wire 100 by sandwiching the magnet wire 100 inserted into the insertion groove 17a from both sides. In the contact 11, the holding portions 17 are provided in pairs. The pair of holding portions 17 are arranged on both sides of the multiple pressure contact portions 16 in the front-rear direction, which is the direction in which the magnet wire 100 that is pressed against the contact 11 by the multiple pressure contact portions 16 extends. More specifically, in the contact 11, the pair of holding portions 17 and the four pressure contact portions 16 are arranged side by side along the front-rear direction. One of the pair of holding portions 17 is arranged on the front side, which is one side in the front-rear direction, relative to the multiple pressure contact portions 16. The other of the pair of holding portions 17 is arranged on the rear side, which is the other side in the front-rear direction, relative to the multiple pressure contact portions 16.

In addition, each of the pair of holding parts 17 is provided with an insertion groove 17a through which the magnet wire 100 extending along the front-rear direction is inserted. In this embodiment, the insertion groove 17a is provided as a slit-shaped groove that penetrates the holding part 17 along the up-down direction. Each of the pair of holding parts 17 also has a pair of arm parts 17b extending in a cantilever shape. Each of the pair of arm parts 17b in each holding part 17 is provided so as to extend parallel to the up-down direction. The insertion groove 17a in each holding part 17 is formed as a gap between the pair of arm parts 17b extending parallel to the up-down direction. Each holding part 17 is configured to hold the magnet wire 100 by sandwiching the magnet wire 100 inserted into the insertion groove 17a with the pair of arm parts 17b from both the left and right sides. The pair of arms 17b are configured to bend and elastically deform slightly when the magnet wire 100 is inserted into the insertion groove 17a, allowing the magnet wire 100 to be grasped and held from both the left and right sides by elastic force.

The insertion groove 17a in the holding portion 17 is provided so as to extend parallel to the slit of the slit blade 16a of the pressure contact portion 16 in a state where at least a part of the insertion groove 17a is overlapped with the slit of the slit blade 16a when viewed from the front-rear direction. In this embodiment, the insertion groove 17a is provided so as to extend parallel to the slit of the slit blade 16a in the up-down direction in a state where the insertion groove 17a is overlapped with the slit of the slit blade 16a over the entire length of the slit when viewed from the front-rear direction. In this embodiment, the insertion groove 17a is provided so that the vertical length of the insertion groove 17a extends longer than the vertical length of the slit of the slit blade 16a of the pressure contact portion 16. The lower end side portion of the insertion groove 17a in the holding portion 17 is provided so as to protrude downward longer than the lower end side portion of the slit of the slit blade 16a in the pressure contact portion 16. The contact 11 is configured so that the magnet wire 100, which is inserted into the insertion groove 17a of the pair of holding parts 17 and held by the pair of holding parts 17, can be held by the pair of holding parts 17 in a state where it is not inserted into the slit blade 16a of the pressure contact part 16 and is removed from the slit blade 16a (see FIG. 6(A)). Furthermore, the contact 11 is configured so that the magnet wire 100 held by the pair of holding parts 17 can be inserted into the slit blade 16a of the pressure contact part 16 by relatively displacing the magnet wire 100 held by the pair of holding parts 17 to a position corresponding to the slit blade 16a of the pressure contact part 16 while sliding the magnet wire 100 held by the pair of holding parts 17 upward along the insertion groove 17a (see FIG. 6(B)).

The pair of arms 17b of the holding portion 17 are integrally connected to the pressure contact portion 16 by the connecting portion 17c. The connecting portions 17c that integrally connect the pair of arms 17b of the holding portion 17 to the pressure contact portion 16 are provided in pairs. Each of the pair of connecting portions 17c is provided in a long and narrow plate shape that bends and extends from the upper end side of the pressure contact portion 16 in the front-rear direction. One of the pair of connecting portions 17c connects the upper end of one of the pair of arms 17b of the holding portion 17 to the upper end side of the pressure contact portion 16. The other of the pair of connecting portions 17c connects the upper end of the other of the pair of arms 17b of the holding portion 17 to the upper end side of the pressure contact portion 16. Therefore, in the contact 11, the pressure contact portion 16 and the holding portion 17 are provided integrally.

As shown in Fig. 4(B) and Fig. 5, the contact 11 is inserted into the retaining hole 19a of the first housing 12 and held in the first housing 12. Then, while the contact 11 is held in the first housing 12, the contact 11 is pressed against the magnet wire 100. When the contact 11 is pressed against the magnet wire 100, as shown in Fig. 6(A), the magnet wire 100 is first held by a pair of retaining portions 17 of the contact 11 held in the first housing 12. Note that Fig. 6(A) shows the contact 11 that is held in the first housing 12 and holds the magnet wire 100 in a schematic manner with the first housing 12 omitted. When the magnet wire 100 is held in the contact 11 held in the first housing 12, the magnet wire 100 is inserted into the insertion groove 17a of each retaining portion 17. When the magnet wire 100 is inserted into the insertion groove 17a, the pair of arms 17b of the holding portion 17 elastically deform to sandwich the magnet wire 100 from both the left and right sides. The pair of arms 17b of the holding portion 17 sandwich the magnet wire 100 from both sides, so that the magnet wire 100 is held by the holding portion 17. The magnet wire 100 is also held at two points by the pair of holding portions 17. In this state, the magnet wire 100 inserted into the insertion grooves 17a of the pair of holding portions 17 and held by the pair of holding portions 17 is not inserted into the slit blades 16a of the pressure contact portion 16 and is held by the pair of holding portions 17 in a state where it is removed from the slit blades 16a.

When the magnet wire 100 is held by the pair of holding parts 17 against the contact 11, the press-fitting part 16 of the contact 11 is then pressed against the magnet wire 100. When the press-fitting part 16 and the magnet wire 100 are pressed against each other, as shown in FIG. 6B, the magnet wire 100 held by the pair of holding parts 17 on the contact 11 held by the first housing 12 is displaced relative to the pair of holding parts 17 while sliding upward along the insertion grooves 17a of each holding part 17. Note that FIG. 6B shows the contact 11 held by the first housing 12 and pressed against the magnet wire 100 in a schematic manner with the first housing 12 omitted. The magnet wire 100 is inserted into the slit blades 16a of the multiple press-fitting parts 16 by being displaced relative to the pair of holding parts 17 while sliding upward along the insertion grooves 17a of each holding part 17. Then, the magnet wire 100 slides upward relative to the holding portion 17 and is inserted into the slit blade 16a of the pressure-contact portion 16, so that the slit blade 16a cuts through the enamel coating of the magnet wire 100 and bites into the core of the magnet wire 100, and the pressure-contact portion 16 is pressure-contacted to the magnet wire 100. The pressure-contact portion 16 is pressure-contacted to the magnet wire 100, so that the contact 11 is electrically connected to the magnet wire 100. The magnet wire 100 slides upward along the insertion groove 17a of each holding portion 17 and is displaced relative to the pair of holding portions 17, as described below, when the first housing 12 holding the contact 11 is fitted into the second housing 13.

(First housing)
1, 2, 4 and 5, the first housing 12 is formed of an insulating resin material and is provided as a housing member that holds a plurality of contacts 11. The first housing 12 is configured to be connected to the second housing 13 by fitting, with the contacts 11 held by the first housing 12 holding the magnet wire 100 by a pair of holding portions 17.

The first housing 12 has a basic shape including a cylindrical main body 18 that has a generally rectangular cross-sectional shape and extends in a cylindrical shape in the vertical direction, and a bottom 19 that is provided to close the lower end of the cylindrical main body 18. When the first housing 12 is connected to the second housing 13 by fitting, the first housing 12 is configured to fit into the second housing 13 from the lower end side where the bottom 19 is provided.

The bottom 19 of the first housing 12 is provided with a number of retaining holes 19a into which the contacts 11 are inserted and held. The retaining holes 19a are provided as holes that penetrate the bottom 19 from top to bottom. When the contacts 11 are inserted into the retaining holes 19a, the contacts 11 are inserted from below into the retaining holes 19a through the rectangular cylindrical portion on the upper end side of the main body 14. The contacts 11 are then pressed into the retaining holes 19a up to the lower end side of the main body 14, thereby being held in the first housing 12.

The upper end region of the retaining hole 19a penetrating the bottom 19 is formed as a region having a shape corresponding to the upper end of the square tube-shaped portion of the main body 14 of the contact 11. The lower end region of the retaining hole 19a is formed as a region having a shape corresponding to the lower end portion of the main body 14 of the contact 11 and the connecting portion 14a. The inner wall defining the lower end region of the retaining hole 19a is configured so that the press-fit claws 14b provided on the connecting portion 14a of the contact 11 are pressed into the retaining hole 19a when the contact 11 is inserted into the retaining hole 19a. The press-fit claws 14b of the connecting portion 14a of the contact 11 are pressed into the retaining hole 19a, so that the contact 11 inserted into the retaining hole 19a is firmly held in the first housing 12. The contact 11 inserted and held in the holding hole 19a is held in the first housing 12 with the multiple pressure contact portions 16 and the pair of holding portions 17 protruding downward from the bottom 19 of the first housing 12 and exposed.

The cylindrical main body 18 of the first housing 12 has engagement protrusions 18b on both left and right sides. When the first housing 12 is fitted and connected to the second housing 13, the engagement protrusions 18b on both left and right sides of the cylindrical main body 18 engage with the inner wall of the second housing 13, locking the first housing 12 and the second housing 13. This prevents the first housing 12 from coming off the second housing 13 when the first housing 12 is fitted into the second housing 13.

The first housing 12 is configured to be fitted and connected to a mating connector (not shown) connected to another device (not shown) connected to an electric device (not shown) such as an electric motor or resolver in which the magnet wire 100 is provided as a winding. The cylindrical main body 18 of the first housing 12 has an opening 18a that opens upward at its upper end. When the mating connector is fitted and connected to the first housing 12, the mating connector is inserted into the opening 18a and fitted. Inside the opening 18a in the cylindrical main body 18, the mating connection portion 15 of the contact 11 is exposed in a state of protruding upward. When the first housing 12 and the mating connector are fitted and connected, the mating contact of the mating connector inserted into the opening 18a of the cylindrical main body 18 comes into contact with the mating connection portion 15 of the contact 11 exposed in the opening 18a and is electrically connected.

7 is a perspective view showing a state in which a magnet wire 100 is held by a contact 11 held in the first housing 12. Referring to Figs. 4(B), 5 and 7, a plurality of contacts 11 are inserted and held in the first housing 12. The plurality of contacts 11 are inserted and held in the plurality of holding holes 19a in the first housing 12, respectively, and are held in the first housing 12 in a state in which the plurality of pressure contact portions 16 and the pair of holding portions 17 protrude downward from the bottom portion 19 of the first housing 12 and are exposed (see Fig. 5). With the plurality of contacts 11 held in the first housing 12 in this way, a plurality of magnet wires 100 are held in the plurality of contacts 11, respectively (see Fig. 6(A)). Each magnet wire 100 is held by each contact 11 by being inserted into the insertion grooves 17a of a pair of holding parts 17 exposed below the first housing 12. Each magnet wire 100 held by each contact 11 held in the first housing 12 is held by each contact 11 in a state of extending along the front-rear direction. Each magnet wire 100 held by each contact 11 is arranged so that the front end 100a of each magnet wire 100 is located in a position that is covered and hidden by the bottom 19 when viewed from above the first housing 12. In other words, each magnet wire 100 held by each contact 11 is arranged so that the front end 100a is located in a position that overlaps the inside of the bottom 19 when viewed from below the first housing 12.

(Second housing)
Fig. 8(A) and Fig. 8(B) are perspective views showing the second housing 13 in the magnet wire connection device 1. Fig. 9 is an enlarged view of a portion of the second housing 13 shown in Fig. 8(B). With reference to Figs. 1, 2, 8 and 9, the second housing 13 is formed of an insulating resin material and is provided as a housing member that is connected to the first housing 12 by fitting. The second housing 13 is configured so that the first housing 12, which holds a plurality of contacts 11 each holding a magnet wire 100, is fitted and connected to the second housing 13.

The second housing 13 is configured to include a main body 20 and a pair of fitting frames (21a, 21b). In this embodiment, the main body 20 is provided in a substantially rectangular shape and is configured to abut against the lower end of the first housing 12 that fits into the second housing 13 to support the first housing 12.

The pair of fitting frames (21a, 21b) are provided on the upper end side of the main body 20, and are provided as a pair of frame-shaped walls that form a fitting opening when the first housing 12 is fitted into the second housing 13. Each of the pair of fitting frames (21a, 21b) is provided on both sides of the upper end side of the main body 20 in the left-right direction, and is provided as a wall extending upward. Specifically, the fitting frame 21a is provided on the left end side of the upper end side of the main body 20, and is provided as a wall extending upward. The fitting frame 21b is provided on the right end side of the upper end side of the main body 20, and is provided as a wall extending upward. Both the fitting frame 21a and the fitting frame 21b are provided so as to extend upward in a state in which they are bent from the center side in the left-right direction to be recessed outward in the left-right direction. The area between the fitting frame 21a and the fitting frame 21b defines the fitting opening when the first housing 12 fits into the second housing 13. In this embodiment, the fitting frame 21a and the fitting frame 21b are provided as walls extending separately from the upper end side of the main body 20, but this is not necessarily the case. The fitting frame 21a and the fitting frame 21b may be integrally provided, and the integral fitting frame (21a, 21b) may be provided so as to extend upward from the main body 20 in a frame-like or cylindrical shape.

When the first housing 12 is fitted into the second housing 13, the first housing 12 is inserted into the fitting gap in the region between the fitting frame portion 21a and the fitting frame portion 21b. By inserting the first housing 12 into the fitting gap between the fitting frame portion 21a and the fitting frame portion 21b, the first housing 12 is fitted and connected to the second housing 13 as shown in FIG. 1. Note that the fitting frame portion 21a and the fitting frame portion 21b each have an engagement hole 22. When the first housing 12 is inserted between the pair of fitting frames (21a, 21b) and fitted into the second housing 13, the engagement protrusion 18b provided on the cylindrical main body portion 18 of the first housing 12 engages with the engagement hole 22 of the pair of fitting frames (21a, 21b). This prevents the first housing 12 from coming off the second housing 13 when the first housing 12 is fitted into the second housing 13.

Figure 10(A) is a front view of the magnet wire connection device 1, showing the state in which the first housing 12 and the second housing 13 are connected by fitting, and Figure 10(B) is an enlarged view of a part of Figure 10(A). Note that Figure 10(B) is an enlarged view of the X part surrounded by a dashed line in Figure 10(A). Figure 11(A) is a cross-sectional view of the magnet wire connection device 1, taken along the line A-A in Figure 10(A), and Figure 11(B) is an enlarged view of a part of Figure 11(A). With reference to Figures 8 to 11, the upper end surface of the main body 20 of the second housing 13 is provided with a holding part insertion groove 23 and a pressure contact part insertion groove 24 into which the lower end parts of the holding part 17 and the pressure contact part 16 of the contact 11 held in the first housing 12 are inserted, respectively, and a contact part 25 that contacts the magnet wire 100 held in the contact 11 is provided.

8, 9 and 11, the retaining portion insertion groove 23 is provided as a groove into which the tip portion of the lower end side of the retaining portion 17 of the multiple contacts 11 held by the first housing 12 is inserted when the first housing 12 is fitted into the second housing 13. The retaining portion insertion groove 23 is configured as a groove extending along the left-right direction on the upper end surface of the main body 20, and is provided in a pair corresponding to the pair of retaining portions 17 of the contacts 11. One of the pair of retaining portion insertion grooves 23 is provided as a groove extending in the left-right direction in one of the front-rear directions on the upper end surface of the main body 20, and is configured to insert the tip portion of the lower end side of one of the pair of retaining portions 17. The other of the pair of retaining portion insertion grooves 23 is provided as a groove extending in the left-right direction in the other of the front-rear directions on the upper end surface of the main body 20, and is configured to insert the tip portion of the lower end side of the other of the pair of retaining portions 17. The retaining portion insertion groove 23 is provided on the upper end surface of the main body 20, extending long in the left-right direction so as to accommodate all of the retaining portions 17 of the multiple contacts 11 held in the first housing 12 in a line along the left-right direction. The retaining portion insertion groove 23 is configured so that all of the retaining portions 17 of the multiple contacts 11 held in the first housing 12 can be inserted into it.

8, 9 and 11, the pressure contact portion insertion grooves 24 are provided as grooves into which the lower end tip portions of the pressure contact portions 16 of the contacts 11 held in the first housing 12 are inserted when the first housing 12 is fitted into the second housing 13. The pressure contact portion insertion grooves 24 are configured as grooves extending along the left-right direction on the upper end surface of the main body 20, and four pressure contact portion insertion grooves 24 are provided corresponding to the four pressure contact portions 16 of the contacts 11. Each of the four pressure contact portion insertion grooves 24 is provided as a groove extending parallel to each other along the left-right direction on the upper end surface of the main body 20, and is configured so that the lower end tip portions of the four pressure contact portions 16 of the contacts 11 are inserted. The pressure contact portion insertion grooves 24 are provided on the upper surface of the main body 20 so as to extend long in the left-right direction so as to correspond to all of the pressure contact portions 16 of the contacts 11 held in line along the left-right direction in the first housing 12. The pressure contact portion insertion groove 24 is configured so that all of the pressure contact portions 16 of the multiple contacts 11 held in the first housing 12 can be inserted into it.

8 to 11, the abutment portion 25 is provided as a portion that abuts against the magnet wire 100 held by the pair of holding portions 17 when the first housing 12 and the second housing 13 are fitted together. The abutment portion 25 is provided on the upper end surface of the main body portion 20. The abutment portions 25 are provided in a line in the front-rear direction on the upper end surface of the main body portion 20 in correspondence with the magnet wire 100 held by the pair of holding portions 17 and extending along the front-rear direction. The abutment portions 25 are provided on the upper end surface of the main body portion 20 between the holding portion insertion groove 23 and the pressure contact portion insertion groove 24, and between adjacent pressure contact portion insertion grooves 24. For this reason, in this embodiment, five abutment portions 25 are provided in a line in the front-rear direction on the upper end surface of the main body portion 20.

The abutment portions 25 are also arranged in a row in the left-right direction on the upper end surface of the main body 20 so as to correspond to all of the magnet wires 100 held by the pair of holding portions 17 of the contacts 11 held in a row in the left-right direction in the first housing 12. Therefore, on the upper end surface of the main body 20, five rows of abutment portions 25 are arranged in a row in the front-rear direction in multiple rows along the left-right direction. In this embodiment, the rows of five abutment portions 25 arranged in a row in the front-rear direction are arranged in six rows along the left-right direction so as to correspond to all of the six magnet wires 100 held by the pair of holding portions 17 of the six contacts 11 held in a row in the left-right direction in the first housing 12.

The abutment portion 25 is formed in a shape that allows the magnet wire 100 held by the pair of holding portions 17 of the contact 11 held by the first housing 12 to easily fit and come into contact when the first and second housings (12, 13) are fitted together. Specifically, the abutment portion 25 is formed in a tapered recessed shape on the upper end surface of the main body 20 so that the magnet wire 100 held by the contact 11 held by the first housing 12 can be easily guided and come into contact. The abutment portion 25 is provided with a fitting groove 25a into which the magnet wire 100 fits. The fitting groove 25a is provided as a groove with a width dimension corresponding to the diameter dimension of the magnet wire 100, and is provided as a groove extending along the front-rear direction in the abutment portion 25. The fitting groove 25a is provided at the bottom of the abutment portion 25, which has a tapered recessed shape.

The abutting portion 25 is configured to abut against the magnet wire 100 held by the pair of holding portions 17 of the contact 11 and urge the magnet wire 100 when the first housing 12 and the second housing 13 are fitted together. The abutting portion 25 is configured to abut against the magnet wire 100 held by the pair of holding portions 17 and urge the magnet wire 100 when the first and second housings (12, 13) are fitted together, so that the magnet wire 100 slides along the insertion groove 17a of the holding portion 17 and is displaced relative to the pair of holding portions 17 in the vertical direction. When the magnet wire 100 abuts against the abutting portion 25 and is urged, and slides upward along the insertion groove 17a of the holding portion 17 of the contact 11 and is displaced relative to the pair of holding portions 17, the magnet wire 100 is inserted into each of the slit blades 16a of the four pressure contact portions 16 of the contact 11. Then, the magnet wire 100 slides upward relative to the holding portion 17 and is inserted into the slit blade 16a of the pressure-connecting portion 16, so that the slit blade 16a cuts through the enamel coating of the magnet wire 100 and bites into the core wire of the magnet wire 100, and the pressure-connecting portion 16 is pressure-connected to the magnet wire 100 (see FIG. 6(B) and FIG. 11). The pressure-connecting portion 16 is pressure-connected to the magnet wire 100, so that the contact 11 is electrically connected to the magnet wire 100.

As described above, the magnet wire connection device 1 is configured such that when the first housing 12 and the second housing 13 are fitted together, the magnet wire 100 held by the pair of holding portions 17 of the contact 11 is biased by the abutting portion 25 of the second housing 13. The magnet wire connection device 1 is configured such that, as the magnet wire 100 is biased by the abutting portion 25, the magnet wire 100 is displaced relative to the pair of holding portions 17 while sliding against the insertion groove 17a of the holding portion 17. Furthermore, the magnet wire connection device 1 is configured such that, as the magnet wire 100 is displaced relative to the pair of holding portions 17 of the contact 11, the magnet wire 100 is inserted into the slit blades 16a of the four pressure contact portions 16 of the contact 11. The magnet wire connection device 1 is configured so that when the magnet wire 100 is inserted into the slit blade 16a, the slit blade 16a cuts through the enamel coating of the magnet wire 100 and bites into the core wire of the magnet wire 100, causing the pressure-contact portion 16 of the contact 11 to be pressure-contacted to the magnet wire 100. When the pressure-contact portion 16 is pressure-contacted to the magnet wire 100, the contact 11 is electrically connected to the magnet wire 100.

Also, referring to FIG. 11, the first housing 12 and the second housing 13 are configured to cover the front end 100a of the magnet wire 100 held by the holding portion 17 of the contact 11 and pressed against the pressure contact portion 16 from both sides in the vertical direction when they are fitted together. That is, when the first and second housings (12, 13) are fitted together, the front end 100a of the magnet wire 100 is disposed inside the first and second housings (12, 13) in the front-rear direction, and is stored inside the first and second housings (12, 13) without being exposed to the outside. In this way, in the magnet wire connection device 1, the first housing 12 and the second housing 13 are configured to cover the front end 100a of the magnet wire 100 held by the holding portion 17 of the contact 11 from both sides when they are fitted together.

(Connection operation between magnet wire and magnet wire connection device)
Next, a connection operation when the magnet wire 100 is connected to the magnet wire connection device 1 will be described.

When the magnet wire 100 and the magnet wire connection device 1 are connected, as shown in Fig. 4(B) and Fig. 5, first, each of the multiple contacts 11 is inserted into each of the multiple holding holes 19a of the first housing 12 and held in the first housing 12. Then, as shown in Fig. 6(A) and Fig. 7, the magnet wire 100 is held by each pair of holding parts 17 of the multiple contacts 11 held in the first housing 12. When the magnet wire 100 is held in the contacts 11 held in the first housing 12, the magnet wire 100 is inserted into each insertion groove 17a of the pair of holding parts 17 of the contacts 11. When the magnet wire 100 is inserted into the insertion groove 17a of each holding part 17, the pair of arms 17b of each holding part 17 elastically deform to sandwich the magnet wire 100 from both the left and right sides. The pair of arms 17b of each holding portion 17 sandwich the magnet wire 100 from both sides, so that the magnet wire 100 is held by each holding portion 17. This results in the magnet wire 100 being held by the pair of holding portions 17 to the contact 11 held in the first housing 12. In this state, the magnet wire 100 is held by the pair of holding portions 17 while being removed from the slit blade 16a of the pressure contact portion 16.

When the magnet wire 100 is held by the pair of holding portions 17 relative to the contact 11, the first housing 12 and the second housing 13 are then mated. That is, the first housing 12 and the second housing 13 are mated while the contact 11 held by the first housing 12 holds the magnet wire 100. When mating the first and second housings (12, 13), the first housing 12 is inserted into the mating gap between the pair of mating frames (21a, 21b) in the second housing 13. By inserting the first housing 12 into the mating gap between the pair of mating frames (21a, 21b), the first housing 12 and the second housing 13 are mated as shown in Figures 1, 10, and 11.

Referring to Figures 10 and 11, when the first housing 12 and the second housing 13 are mated, the magnet wire 100 held by the pair of holding portions 17 of the contact 11 comes into contact with the abutment portion 25 of the second housing 13 and is biased. At this time, the abutment portion 25 comes into contact with the magnet wire 100, and each holding portion 17 of the contact 11 is inserted into each holding portion insertion groove 23 of the second housing 13, and each pressure contact portion 16 of the contact 11 is inserted into each pressure contact portion insertion groove 24 of the second housing 13.

When the first and second housings (12, 13) are fitted together, the magnet wire 100 comes into contact with the abutment portion 25 and is biased by the abutment portion 25, and the magnet wire 100 is displaced relative to the pair of holding portions 17 while sliding against the insertion groove 17a of the holding portion 17. Furthermore, as the magnet wire 100 is displaced relative to the pair of holding portions 17 of the contact 11, the magnet wire 100 is inserted into the slit blades 16a of the four pressure contact portions 16 of the contact 11. Then, as the magnet wire 100 is inserted into the slit blades 16a, the slit blades 16a cut through the enamel coating of the magnet wire 100 and bite into the core wire of the magnet wire 100, and the pressure contact portion 16 of the contact 11 is pressure-welded to the magnet wire 100. As the pressure contact portion 16 is pressure-welded to the magnet wire 100, the contact 11 is electrically connected to the magnet wire 100. This completes the connection operation between the magnet wire 100 and the magnet wire connection device 1.

(Functions and Effects of the First Embodiment)
According to the magnet wire connection device 1 of the first embodiment, the magnet wire 100 is inserted into the insertion grooves 17a of a pair of holding parts 17 of the contact 11 held in the first housing 12, and the magnet wire 100 is sandwiched between the holding parts 17, so that the magnet wire 100 can be held by the contact 11. Furthermore, while the magnet wire 100 is held by the contact 11, the magnet wire 100 can be slid along the insertion grooves 17a and displaced relative to the pair of holding parts 17, so that the magnet wire 100 can be inserted into the slit blades 16a of the pressure contact part 16 disposed between the pair of holding parts 17. Then, by inserting the magnet wire 100 into the slit blades 16a, the enamel coating is broken by the slit blades 16a, and the slit blades 16a are caused to bite into the magnet wire 100, so that the pressure contact part 16 can be pressure-welded to the magnet wire 100. Therefore, according to the first embodiment, the magnet wire 100 can be easily electrically connected to the magnet wire 100 simply by inserting the magnet wire 100 into the pair of holding portions 17 to hold it, and then displacing the magnet wire 100 relative to the pair of holding portions 17 while sliding it. This makes it possible to improve the workability of the work of electrically connecting the magnet wire connection device 1 to the magnet wire 100. In other words, it is not necessary to perform a complicated and time-consuming work of winding the magnet wire 100 around a columnar portion of a housing to hold it as disclosed in Patent Document 1, and it is possible to improve the workability of the work of electrically connecting the magnet wire connection device 1 to the magnet wire 100.

In addition, according to the magnet wire connection device 1, the contact 11 is integrally provided with a pressure-contact portion 16 that is pressure-contacted to the magnet wire 100 and a pair of holding portions 17 that are disposed on either side of the pressure-contact portion 16 and hold the magnet wire 100 during pressure contact. Therefore, the contact 11 that holds the magnet wire 100 and is pressure-contacted to the magnet wire 100 while still holding the magnet wire 100 can be constructed from a single component. This makes it possible to reduce the number of components in the contact 11 that are electrically connected to the magnet wire 100.

Therefore, according to the first embodiment, it is possible to provide a magnet wire connection device 1 that can reduce the number of parts of the contact 11 that is electrically connected to the magnet wire 100 and improve the workability of the work of electrically connecting to the magnet wire 100.

In addition, the magnet wire connection device 1 can easily be configured with a simple structure that forms an insertion groove 17a through which the magnet wire 100 is inserted, and has a holding portion 17 that holds the magnet wire 100 by sandwiching it from both sides, with a pair of arms 17b extending in a cantilevered manner.

In addition, according to the magnet wire connection device 1, the first housing 12 and the second housing 13 are fitted together in a state in which the contacts 11 held by the first housing 12 hold the magnet wire 100 with a pair of holding parts 17. Then, by fitting the first housing 12 and the second housing 13 together, the magnet wire 100 is biased by the second housing 13, and the magnet wire 100 slides along the insertion groove 17a to be displaced relative to the pair of holding parts 17, so that the magnet wire 100 can be inserted into the slit blade 16a of the pressure contact part 16 arranged between the pair of holding parts 17. Furthermore, by inserting the magnet wire 100 into the slit blade 16a, the enamel coating is broken by the slit blade 16a, and the slit blade 16a is caused to bite into the magnet wire 100, so that the pressure contact part 16 can be pressure-welded to the magnet wire 100. Therefore, according to the first embodiment, the magnet wire 100 is inserted and held in a pair of holding portions 17 of the contact 11 held in the first housing 12, and the first housing 12 and the second housing 13 are fitted together, so that the magnet wire connection device 1 can be electrically connected to the magnet wire 100 more easily. Therefore, the workability of electrically connecting the magnet wire connection device 1 to the magnet wire 100 can be further improved.

In addition, with the magnet wire connection device 1, the structure for biasing the magnet wire 100 when the first housing 12 and the second housing 13 are fitted together can be easily configured with a simple structure in which the abutment portion 25 that abuts against the magnet wire 100 is provided on the second housing 13.

In addition, according to the magnet wire connection device 1, the abutment portion 25 that abuts against and biases the magnet wire 100 when the first housing 12 and the second housing 13 are fitted together is provided with a fitting groove 25a into which the magnet wire 100 fits, so that the magnet wire 100 can be biased in a stably supported state. Therefore, according to the magnet wire connection device 1, when the first housing 12 and the second housing 13 are fitted together, the magnet wire 100 is biased by the abutment portion 25, so that the magnet wire 100 can be displaced relative to the pair of holding portions 17 and inserted into the slit blades 16a of the pressure contact portion 16 accurately and stably.

In addition, with the magnet wire connection device 1, when the first housing 12 and the second housing 13 are engaged, the tip 100a of the magnet wire 100 held by the holding portion 17 is covered by being sandwiched from both sides. Therefore, when the first housing 12 and the second housing 13 are engaged and the magnet wire connection device 1 is connected to the magnet wire 100, the fracture surface of the tip 100a of the magnet wire 100 can be prevented from being exposed to the outside of the magnet connection device 1. Since the fracture surface of the tip 100a of the magnet wire 100 can be prevented from being exposed to the outside, it is possible to prevent a short circuit from occurring at the tip 100a of the magnet wire 100.

[Second embodiment]
Next, a magnet wire connection device 2 according to a second embodiment of the present invention will be described. In the following description of the second embodiment, the same components as those in the first embodiment are denoted by the same reference numerals in the drawings.

(Outline of magnet wire connection device)
Fig. 12 is a perspective view showing a magnet wire connection device 2 according to a second embodiment of the present invention. Fig. 13 is an exploded perspective view of the magnet wire connection device 2. Fig. 12 shows a state in which a plurality of magnet wires 100 are connected to the magnet wire connection device 2. Fig. 13 also shows the end side of the magnet wires 100 that will be connected to the magnet wire connection device 2.

Referring to Figures 12 and 13, the magnet wire connection device 2 is configured as a connection device electrically connected to a plurality of magnet wires 100. The magnet wire 100 is provided as a winding of an electric device (not shown) such as an electric motor or a resolver, and is configured as an electric wire including a core wire as a conductor and an enamel coating as an insulator around the core wire. The magnet wire connection device 2 connected to the magnet wire 100 is connected to a mating connector (not shown). The mating connector to which the magnet wire connection device 2 is connected is connected to another device (not shown) to which an electric device such as an electric motor or resolver in which the magnet wire 100 is used as a winding is electrically connected. By connecting the magnet wire connection device 2 to the mating connector, the electric device such as an electric motor or resolver is connected to the other device.

The magnet wire connection device 2 is configured to include a plurality of contacts 26, a first housing 27 that holds the plurality of contacts 26, and a second housing 28 that is connected to the first housing 27 by fitting. In the second embodiment, an example is shown in which the magnet wire connection device 2 is configured to include six contacts 26. Each contact 26 is formed of a metal material having electrical conductivity, and the first housing 27 and the second housing 28 are formed of a resin material having electrical insulation.

Each of the contacts 26 is inserted and held in the first housing 27. With the contacts 26 held in the first housing 12, the magnet wires 100 are held by the contacts 11. With the magnet wires 100 held in the contacts 26 held in the first housing 27, the first housing 27 is fitted into the second housing 28. As described below, the magnet wire connection device 2 is configured such that the first housing 27 and the second housing 28 are connected by fitting, and the contacts 26 are pressed against the magnet wires 100. The magnet wire 100 and the magnet wire connection device 2 are electrically connected by fitting and connecting the first housing 27 and the second housing 28 and pressing the magnet wire 100 and the contacts 26 together.

When the magnet wire connection device 2 and the magnet wire 100 are electrically connected, a mating connector (not shown) connected to another device (not shown) connected to an electric device (not shown) such as an electric motor or resolver in which the magnet wire 100 is provided as a winding is fitted and connected to the second housing 28. The second housing 28 and the mating connector are connected by fitting, and the magnet wire connection device 2 and the mating connector are electrically connected. As a result, the electric device such as an electric motor or resolver is connected to the other device via the magnet wire connection device 2 and the mating connector. The first housing 27 in the magnet wire connection device 2 is provided as a part of the casing of the electric device such as an electric motor or resolver in which the magnet wire 100 is provided as a winding, or as a member assembled to the casing. The configuration of the magnet wire connection device 2 will be further described in detail below.

(contact)
Fig. 14 is an enlarged perspective view of the contact 26 in the magnet wire connection device 2. Fig. 15 is a perspective view showing a state in which the contact 26 is held in the first housing 27 in the magnet wire connection device 2. Fig. 16(A) is a perspective view showing a state in which the magnet wire 100 is held in the contact 26, and Fig. 16(B) is a perspective view showing a state in which the contact 26 is pressed against the magnet wire 100. Note that Fig. 3 shows an enlarged view of only one contact 26.

Referring to Figures 12 to 16, the contacts 26 are formed of a metal material such as copper having electrical conductivity, and are provided as terminal members electrically connected to the magnet wire 100. The contacts 26 are configured to be electrically connected to the magnet wire 100 while inserted and held in the first housing 27. The contacts 26 are also configured to be electrically connected to a mating contact (not shown) provided in the mating connector when the magnet wire connection device 2 is connected to the mating connector.

Referring to Figures 12 to 16, the contact 26 is configured to include a main body 14, a mating connection portion 15, a plurality of pressure contact portions 16, and a pair of holding portions 17. The main body 14, the mating connection portion 15, the plurality of pressure contact portions 16, and the pair of holding portions 17 are integrally provided. The integrally formed contact 26 is formed, for example, by bending the material of the contact 26 cut out by punching a flat metal plate.

14 to 16, the main body 14 is provided as a central structural part extending in a columnar shape in the vertical direction at the center of the front-rear direction of the contact 11. The upper end part of the main body 14 extending in a columnar shape in the vertical direction is formed in a square tube shape. The lower end part of the main body 14 extending in the vertical direction is formed in a frame shape with the front, rear, and left sides closed by walls and the right side open. The contact 26 is configured to be inserted from above into the first housing 27 through the frame-shaped part at the lower end of the main body 14. The contact 26 is also configured to be inserted from above into the first housing 27 together with the frame-shaped part at the lower end of the main body 14, as well as the pressure contact part 16 and the holding part 17. The contact 26 is configured to be held in the first housing 27 by inserting the frame-shaped portion on the lower end side of the main body 14, the pressure contact portion 16, and the holding portion 17 from above into a holding hole 29a (described later) in the first housing 27, and by pressing the frame-shaped portion on the lower end side of the main body 14 into the holding hole 29a. The frame-shaped portion on the lower end side of the main body 14 is provided with a press-fit claw 14b (see Figures 14 and 16). When the frame-shaped portion on the lower end side of the main body 14 is inserted into the holding hole 29a of the first housing 27, the press-fit claw 14b is pressed into the inner wall of the holding hole 29a. The press-fit claw 14b of the main body 14 is pressed into the holding hole 29a of the first housing 27, so that the contact 26 is held in the first housing 27.

The upper corner of the main body 14 is configured to be inserted from below into the second housing 28 when the first housing 27 holding the contacts 26 is fitted to the second housing 28. The upper corner of the main body 14 is inserted from below into an insertion hole 36 in the second housing 28, which will be described later. The upper end of the upper corner of the main body 14 is configured as the mating connector 15. The mating connector 15 is configured as an electrical contact portion in the contact 26 that contacts and is electrically connected to the mating contact provided in the mating connector when the magnet wire connection device 2 is connected to the mating connector. The mating connector 15 is, for example, provided as a male electrical contact portion, and is configured to be fitted and electrically connected to the female electrical contact portion of the mating contact.

14 to 16, each of the multiple pressure contact portions 16 in the contact 26 has a slit blade 16a that cuts through the enamel coating of the magnet wire 100 and is provided as a portion that is pressure-welded to the magnet wire 100. In the contact 26 of this embodiment, four pressure contact portions 16 are provided as the multiple pressure contact portions 16. The four pressure contact portions 16 are provided in series along the front-rear direction. All four pressure contact portions 16 are provided integrally with the main body portion 14. Of the four pressure contact portions 16 arranged in the front-rear direction, each of the two pressure contact portions 16 on the center side in the front-rear direction is provided integrally with the main body portion 14 at the lower end side of the main body portion 14. In addition, of the four pressure contact portions 16 arranged in the front-rear direction, each of the two pressure contact portions 16 on both ends in the front-rear direction is connected integrally to the lower end side of the main body portion 14 via a connecting portion 14a that extends in a plate shape along the front-rear direction. The connecting portions 14a are provided in a pair and extend in a plate shape from the lower end of the main body 14 to both sides in the front-rear direction. Of the four pressure contact portions 16 aligned in the front-rear direction, two pressure contact portions 16 at both ends in the front-rear direction are connected to each of the pair of connecting portions 14a. The connecting portions 14a are inserted into the first housing 27 when the contacts 26 are inserted and held in the holding holes 29a in the first housing 27.

Each of the four pressure-connecting portions 16 has a slit blade 16a that cuts through the enamel coating of the magnet wire 100. The slit blade 16a of each pressure-connecting portion 16 has a pair of blades that extend in the vertical direction in approximately parallel with a gap. The magnet wire 100 is inserted in the slit formed as a gap between the pair of blades in the slit blade 16a of each pressure-connecting portion 16 while extending in the front-rear direction. The slit of the slit blade 16a of each pressure-connecting portion 16 is configured so that the upper end side is open to the outside. The magnet wire 100 is inserted into the slit of the slit blade 16a by inserting it from the open area on the upper end side. The slit blade 16a of each pressure-connecting portion 16 is configured to cut through the enamel coating of the magnet wire 100 inserted into the slit between the pair of blades with the pair of blades, and to be pressed against the magnet wire 100 by biting into the core wire of the magnet wire 100. When the slit blade 16a of the pressure contact portion 16 is pressed against the magnet wire 100, the contact 11 is electrically and mechanically connected to the magnet wire 100.

14 to 16, the holding portion 17 in the contact 26 is provided with an insertion groove 17a through which the magnet wire 100 is inserted, and is provided as a portion that holds the magnet wire 100 by sandwiching the magnet wire 100 inserted into the insertion groove 17a from both sides. In the contact 26, the holding portions 17 are provided in pairs. The pair of holding portions 17 are arranged on both sides of the multiple pressure contact portions 16 in the front-rear direction, which is the direction in which the magnet wire 100 that is pressed against the contact 26 by the multiple pressure contact portions 16 extends. More specifically, in the contact 26, the pair of holding portions 17 and the four pressure contact portions 16 are arranged side by side along the front-rear direction. One of the pair of holding portions 17 is arranged on the front side, which is one side in the front-rear direction, relative to the multiple pressure contact portions 16. The other of the pair of holding portions 17 is arranged on the rear side, which is the other side in the front-rear direction, relative to the multiple pressure contact portions 16.

In addition, each of the pair of holding parts 17 is provided with an insertion groove 17a through which the magnet wire 100 extending along the front-rear direction is inserted. In this embodiment, the insertion groove 17a is provided as a slit-shaped groove that penetrates the holding part 17 along the up-down direction. Each of the pair of holding parts 17 also has a pair of arm parts 17b extending in a cantilever shape. Each of the pair of arm parts 17b in each holding part 17 is integrally connected to the connecting part 14a via the connecting part 17c. Each of the pair of arm parts 17b in each holding part 17 is provided so that it extends in the front-rear direction from the connecting part 17c, bends, and further protrudes in the left-right direction to extend in a cantilever shape. The ends of the pair of arm parts 17b of each holding part 17 that protrude in the left-right direction are provided so as to face each other. The insertion groove 17a in each holding part 17 is formed as a gap between the pair of arm parts 17b. More specifically, the insertion groove 17a is formed as a gap between the ends of the pair of arm portions 17b that protrude in the left-right direction and face each other. Each holding portion 17 is configured so that the pair of arm portions 17b hold the magnet wire 100 inserted into the insertion groove 17a by sandwiching the magnet wire 100 from both left and right sides. Furthermore, the pair of arm portions 17b are configured so that when the magnet wire 100 is inserted into the insertion groove 17a, they are slightly elastically deformed and bent, so that the magnet wire 100 can be grasped and held from both left and right sides by elastic force. The pair of arm portions 17b that constitute the holding portion 17 are integrally provided with the main body portion 14 and the pressure contact portion 16 via the joining portion 17c and the connecting portion 14a. Therefore, in the contact 26, the pressure contact portion 16 and the holding portion 17 are integrally provided.

The insertion groove 17a in the holding portion 17 is arranged to extend parallel to the up-down direction with at least a portion overlapping the slit of the slit blade 16a of the pressure contact portion 16 when viewed from the front-rear direction. The upper end portion of the insertion groove 17a in the holding portion 17 is arranged to extend and protrude upward longer than the upper end portion of the slit of the slit blade 16a in the pressure contact portion 16. The contact 26 is configured so that the magnet wire 100 inserted into the insertion groove 17a of the pair of holding portions 17 and held by the pair of holding portions 17 can be held by the pair of holding portions 17 in a state where it is not inserted into the slit blade 16a of the pressure contact portion 16 and is removed from the slit blade 16a (see FIG. 16(A)). Furthermore, the contact 26 is configured so that the magnet wire 100 held by the pair of holding portions 17 can be inserted into the slit blade 16a of the pressure contact portion 16 by sliding the magnet wire 100 held by the pair of holding portions 17 downward along the insertion groove 17a and displacing it relatively to a position corresponding to the slit blade 16a of the pressure contact portion 16 (see FIG. 16(B)).

13 and 15, the contact 26 is inserted into the retaining hole 29a of the first housing 27 and held in the first housing 27. Then, while the contact 26 is held in the first housing 27, the contact 26 is pressed against the magnet wire 100. When the contact 26 is pressed against the magnet wire 100, as shown in FIG. 16(A), the magnet wire 100 is first held by the pair of retaining portions 17 of the contact 26 held in the first housing 27. Note that FIG. 16(A) shows a schematic diagram of the contact 11 that is held in the first housing 27 and holds the magnet wire 100, with the first housing 27 omitted. When the magnet wire 100 is held in the contact 26 held in the first housing 27, the magnet wire 100 is inserted into the insertion groove 17a of each retaining portion 17. When the magnet wire 100 is inserted into the insertion groove 17a, the pair of arms 17b of the holding portion 17 elastically deform to sandwich the magnet wire 100 from both the left and right sides. The pair of arms 17b of the holding portion 17 sandwich the magnet wire 100 from both sides, so that the magnet wire 100 is held by the holding portion 17. The magnet wire 100 is also held at two points by the pair of holding portions 17. In this state, the magnet wire 100 inserted into the insertion grooves 17a of the pair of holding portions 17 and held by the pair of holding portions 17 is not inserted into the slit blades 16a of the pressure contact portion 16 and is held by the pair of holding portions 17 in a state where it is removed from the slit blades 16a.

When the magnet wire 100 is held by the pair of holding parts 17 against the contact 26, the press-fitting part 16 of the contact 26 is then pressed against the magnet wire 100. When the press-fitting part 16 and the magnet wire 100 are pressed against each other, as shown in FIG. 16B, the magnet wire 100 held by the pair of holding parts 17 on the contact 26 held by the first housing 27 is displaced relative to the pair of holding parts 17 while sliding downward along the insertion groove 17a of each holding part 17. Note that FIG. 16B shows the contact 26 held by the first housing 27 and pressed against the magnet wire 100 in a schematic manner with the first housing 27 omitted. The magnet wire 100 is inserted into the slit blades 16a of the multiple press-fitting parts 16 by being displaced relative to the pair of holding parts 17 while sliding downward along the insertion groove 17a of each holding part 17. Then, the magnet wire 100 slides downward relative to the holding portion 17 and is inserted into the slit blade 16a of the pressure-connecting portion 16, so that the slit blade 16a cuts through the enamel coating of the magnet wire 100 and bites into the core of the magnet wire 100, and the pressure-connecting portion 16 is pressure-connected to the magnet wire 100. The pressure-connecting portion 16 is pressure-connected to the magnet wire 100, so that the contacts 26 are electrically connected to the magnet wire 100. The operation of the magnet wire 100 sliding downward along the insertion grooves 17a of each holding portion 17 and displacing it relative to the pair of holding portions 17 is accompanied by the operation of fitting the first housing 27 holding the contacts 26 into the second housing 28, as described below.

(First housing)
12, 13 and 15, the first housing 27 is formed of an insulating resin material and is provided as a housing member that holds a plurality of contacts 26. The first housing 27 is configured to be connected to the second housing 28 by fitting, with the contacts 26 held by the first housing 27 holding the magnet wire 100 by a pair of holding portions 17.

The first housing 27 is configured to have a plate-like extending rectangular body 29 with a longer left-right length than front-rear length, and a pair of side walls (30a, 30b) extending vertically from both left-right ends of the body 29. Each of the pair of side walls (30a, 30b) is integral with the body 29 and extends upward from the body 29. One side wall 30a extends upward from the left end of the body 29. The other side wall 30b extends upward from the right end of the body 29. When the first housing 27 is connected to the second housing 28 by fitting, it is configured to fit into the second housing 28 from the upper end side where the pair of side walls (30a, 30b) are provided.

13 and 15, the plate-shaped main body 29 of the first housing 27 is provided with a plurality of holding holes 29a into which the plurality of contacts 26 are inserted and held. The holding holes 29a are provided on the upper end surface of the plate-shaped main body 29 as recessed holes into which the lower end portions of the contacts 26 are inserted and held. The holding holes 29a are opened on the upper end surface of the plate-shaped main body 29 and are provided as recessed holes recessed downward from the upper end surface of the plate-shaped main body 29. The holding holes 29a may be provided as through holes penetrating the plate-shaped main body 29. When the contacts 26 are inserted into the holding holes 29a, the frame-shaped portion on the lower end side of the main body 14, the pressure contact portion 16, and the holding portion 17 of the contacts 26 are inserted into the holding holes 29a from above. The contacts 26 are held in the first housing 27 by pressing the frame-shaped portion at the bottom end of the main body 14 into the holding hole 29a.

The retaining hole 29a penetrating the plate-shaped main body 29 is formed in a shape corresponding to the shape of the frame-shaped portion at the lower end of the main body 14 of the contact 26, the pressure contact portion 16, and the retaining portion 17. The inner wall of the portion of the retaining hole 29a corresponding to the frame-shaped portion at the lower end of the main body 14 is configured so that the press-fit claws 14b provided on the main body 14 of the contact 26 are pressed into the retaining hole 29a when the contact 26 is inserted into the retaining hole 29a. The press-fit claws 14b of the main body 14 of the contact 26 are pressed into the retaining hole 29a, so that the contact 26 inserted into the retaining hole 29a is firmly held in the first housing 27. The contact 26 inserted and held in the retaining hole 29a is held in the first housing 27 in a state in which the pressure contact portion 16 and the retaining portion 17 are not hidden when viewed from above, but the entire pressure contact portion 16 and the retaining portion 17 are exposed and facing upward. In addition, the contact 26 inserted and held in the holding hole 29a is held in the first housing 27 with the upper end portion of the body 14, which is formed into a square tube shape, protruding upward from the plate-shaped body 29 and exposed.

Referring to Figs. 13 and 15, the upper surface of the plate-shaped main body 29 is provided with wire placement grooves 29b that correspond to the respective holding holes 29a and extend from each holding hole 29a to both sides in the front-rear direction. The wire placement grooves 29b are provided as grooves in which the magnet wire 100 is placed when the magnet wire 100 is held and pressure-welded to the contact 26 held in the holding holes 29a in the first housing 27. That is, when the magnet wire 100 is held by the holding portion 17 with the contact 26 held in the holding holes 29a in the first housing 27, and the pressure-welded portion 16 is further pressure-welded to the magnet wire 100, the portion of the magnet wire 100 that extends from the contact 26 is placed in the wire placement groove 29b.

A pair of side walls (30a, 30b) of the first housing 27 each have an engagement hole 31. When the first housing 27 is fitted and connected to the second housing 28, the engagement holes 31 provided in the pair of side walls (30a, 30b) engage with the second housing 28, locking the first housing 27 and the second housing 28 together. This prevents the first housing 27 from coming off the second housing 28 when the first housing 27 is fitted into the second housing 28.

17 is a perspective view showing a state in which a magnet wire 100 is held by contacts 26 held in a first housing 27. Referring to Figs. 15 and 17, a plurality of contacts 26 are inserted and held in the first housing 27. The plurality of contacts 26 are inserted and held in a plurality of holding holes 29a in the first housing 27, respectively, and are held in the first housing 27 in a state in which they are lined up along the left-right direction. The plurality of contacts 26 held in the first housing 27 are held in the first housing 27 with the plurality of pressure contact portions 16 and the pair of holding portions 17 facing upward from the holding holes 29a and fully exposed. With the plurality of contacts 26 held in the first housing 27 in this manner, a plurality of magnet wires 100 are held in the plurality of contacts 26, respectively (see Figs. 16(A) and 17). Each magnet wire 100 is held by each contact 26 by being inserted into the insertion grooves 17a of a pair of holding parts 17 facing upward from the holding holes 29a of the first housing 27. Each magnet wire 100 held by each contact 26 held in the first housing 27 is held by each contact 26 in a state of extending along the front-rear direction. At this time, the part of each magnet wire 100 held by each contact 26 that extends in the front-rear direction from each contact 26 is disposed in the wire disposing groove 29b corresponding to each holding hole 29a. Each magnet wire 100 held by each contact 26 is disposed so that the front end portion 100a of each magnet wire 100 is located inside the plate-shaped main body portion 29 in the front-rear direction when viewed from above the first housing 27. That is, each magnet wire 100 held by each contact 26 is positioned so that its front end 100a is positioned on the inside of the plate-shaped main body 29 in the front-to-rear direction and overlaps the top surface of the plate-shaped main body 29 when viewed from above the first housing 27.

(Second housing)
Fig. 18 is a perspective view showing the second housing 28 in the magnet wire connection device 2. With reference to Figs. 12, 13 and 18, the second housing 28 is formed of an insulating resin material and is provided as a housing member that is connected by fitting with the first housing 27. The second housing 28 is configured so that the first housing 27, which holds a plurality of contacts 26 each holding a magnet wire 100, is fitted and connected to the second housing 28.

The second housing 28 is configured to include a main body 32, a mating portion 33, and a pair of mating frames (34a, 34b). In this embodiment, the main body 32 is provided in a substantially rectangular shape and is configured to abut against the upper end of the plate-shaped main body 29 of the first housing 27 that fits into the second housing 28, thereby supporting the first housing 27. The mating portion 33 is provided on the upper end side of the main body 32, and the pair of mating frames (34a, 34b) are provided on the lower end side of the main body 32.

The second housing 28 is configured so that a mating connector (not shown) connected to another device (not shown) connected to an electric device (not shown) such as an electric motor or resolver in which the magnet wire 100 is provided as a winding is fitted and connected at the mating fitting portion 33. With reference to Figures 12, 13 and 18, the mating fitting portion 33 is provided on the upper end side of the main body portion 32 and is provided so as to extend cylindrically in the vertical direction with an external shape having a substantially rectangular cross section. The mating fitting portion 33 is provided with an opening 33a that opens upward at its upper end. When the mating connector is fitted and connected to the first housing 27, the mating connector is inserted into the opening 33a and fitted.

When the first housing 27 is fitted to the second housing 28, the mating connection portion 15 of the contact 26 held in the first housing 27 penetrates the insertion hole 36 (described later) provided in the main body 32 and protrudes and extends above the main body 32. When the first housing 27 is fitted to the second housing 28, the mating connection portion 15 of the contact 26 protrudes and extends upward and is exposed inside the opening 33a in the mating fitting portion 33. When the first housing 27 is fitted to the second housing 28 and the mating connection portion 15 of the contact 26 is exposed inside the mating fitting portion 33, the mating connector is fitted to the mating fitting portion 33 of the second housing 28, and the second housing 28 and the mating connector are connected. When the mating portion 33 of the second housing 28 is mated with the mating connector, the mating contact of the mating connector inserted into the opening 33a of the mating portion 33 comes into contact with the mating connection portion 15 of the contact 26 exposed within the opening 33a and is electrically connected.

12, 13 and 18, the pair of fitting frames (34a, 34b) are provided on the lower end side of the main body 32 and are provided as a pair of frame-shaped walls that form a fitting opening when the first housing 27 is fitted into the second housing 28. Each of the pair of fitting frames (34a, 34b) is provided on both sides of the lower end side of the main body 32 in the left-right direction and is provided as a wall portion that extends short downward. Specifically, the fitting frame 34a is provided on the left end side of the lower end side of the main body 32 and is provided as a wall portion that extends short downward. The fitting frame 34b is provided on the right end side of the lower end side of the main body 32 and is provided as a wall portion that extends short downward. Both the fitting frame 34a and the fitting frame 34b are provided so as to extend short downward in a state formed so as to define an area recessed from the center side in the left-right direction to the outside in the left-right direction. The area between the fitting frame 34a and the fitting frame 34b defines the fitting opening when the first housing 27 is fitted to the second housing 28. In this embodiment, the fitting frame 34a and the fitting frame 34b are provided as walls extending separately from the lower end side of the main body 32, but this is not necessarily the case. The fitting frame 34a and the fitting frame 34b may be integrally provided, and the integral fitting frame (34a, 34b) may be provided so as to extend downward from the main body 32 in a frame-like or cylindrical shape.

When the first housing 27 is fitted into the second housing 28, the first housing 27 is inserted into the fitting opening in the area between the fitting frame portion 34a and the fitting frame portion 34b. By inserting the first housing 27 into the fitting opening between the fitting frame portion 34a and the fitting frame portion 34b, the first housing 27 is fitted and connected to the second housing 28 as shown in FIG. 12. When the first housing 27 is fitted into the second housing 28, the plate-shaped main body portion 29 of the first housing 27 is stored in the area between the fitting frame portion 34a and the fitting frame portion 34b.

The main body 32, which is integrally provided with a pair of fitting frames (34a, 34b), is provided with through holes (32a, 32b) that communicate with the area between the pair of fitting frames (34a, 34b). The through hole 32a is provided on the left end side of the main body 32 and is provided as a hole that penetrates the main body 32 in the vertical direction. The through hole 32b is provided on the right end side of the main body 32 and is provided as a hole that penetrates the main body 32 in the vertical direction. When the first housing 27 is fitted into the second housing 28, the pair of side wall portions (30a, 30b) of the first housing 27 are inserted into the through holes (32a, 32b). More specifically, when the first housing 27 is fitted into the second housing 28, the side wall portion 30a is inserted into the through hole 32a of the main body portion 32, and the side wall portion 30b is inserted into the through hole 32b of the main body portion 32. Therefore, when the first housing 27 is fitted into the second housing 28, the pair of side wall portions (30a, 30b) of the first housing 27 are inserted into the through holes (32a, 32b) of the main body portion 32, and the plate-shaped main body portion 29 of the first housing 27 is stored in the area between the pair of fitting frame portions (34a, 34b) of the second housing 28.

In addition, an engagement protrusion 35 is provided on each inner wall of the through holes (32a, 32b) of the main body 32. When the first housing 27 is fitted into the second housing 28 and the pair of side wall portions (30a, 30b) are inserted into the through holes (32a, 32b) of the main body 32, the engagement protrusions 35 provided on each of the through holes (32a, 32b) engage with the engagement holes 31 provided on each of the pair of side wall portions (30a, 30b). When the first housing 27 is fitted into the second housing 28, the engagement protrusions 35 on the inner walls of the through holes (32a, 32b) of the main body 32 engage with the engagement holes 31 of the pair of side wall portions (30a, 30b), thereby locking the first housing 27 and the second housing 28. This prevents the first housing 27 from coming off the second housing 28 when the first housing 27 is fitted into the second housing 28.

12, 13 and 18, the main body 32 is provided with a plurality of insertion holes 36 into which the main body 14 of the plurality of contacts 26 are inserted. The insertion holes 36 are provided as holes penetrating the main body 32 in the vertical direction. When the first housing 27 is fitted into the second housing 28, the main body 14 of the contact 26 held by the plate-shaped main body 29 of the first housing 27 is inserted from below into the insertion hole 36 of the main body 32 of the second housing 28. Then, the contact 26 is inserted into the insertion hole 36 with the square tube-shaped portion on the upper end side of the main body 14 penetrating the insertion hole 36. Therefore, when the first housing 27 and the second housing 28 are fitted together, the main body 14 of the contact 26 penetrating the insertion hole 36 of the main body 32 from below to above is in a state of protruding above the main body 32. In addition, when the main body 14 of the contact 26 protrudes above the main body 32, the mating connection portion 15 of the contact 26 provided on the upper end side of the main body 14 protrudes upward and extends inside the mating mating portion 33 of the second housing 28, becoming exposed.

Figure 19(A) is a front view of the magnet wire connection device 2, showing the state in which the first housing 27 and the second housing 28 are connected by fitting, and Figure 19(B) is an enlarged view of a portion of Figure 19(A). Note that Figure 19(B) is an enlarged view of the Y portion surrounded by a dashed line in Figure 19(A). Figure 20(A) is a cross-sectional view of the magnet wire connection device 2, taken along the line B-B in Figure 19(A), and Figure 20(B) is an enlarged view of a portion of Figure 20(A). With reference to Figures 18 to 20, the lower end surface of the main body 32 of the second housing 28 is provided with an abutment portion 37 that abuts against the magnet wire 100 held by the contact 26 held in the first housing 27.

18 to 20, the abutment portion 37 is provided as a portion that abuts against the magnet wire 100 held by the pair of holding portions 17 of the contact 26 when the first housing 27 and the second housing 28 are fitted together. The abutment portion 37 is provided on the lower end surface of the main body portion 32, and is provided as a portion formed in a convex shape so as to protrude downward from the lower end surface of the main body portion 32. In this embodiment, the abutment portion 37 is provided as a portion formed in a convex shape so as to protrude downward from the lower end surface of the main body portion 32 in a short columnar shape with a substantially rectangular cross-sectional shape. The abutment portions 37 are provided in a row in the front-rear direction on the lower end surface of the main body portion 32 in correspondence with the magnet wire 100 held by the pair of holding portions 17 of the contact 26 and extending along the front-rear direction. The abutment portions 37 are provided at positions corresponding to the spaces between the retaining portion 17 and the pressure contact portion 16 of the contact 26 held in the retaining hole 29a of the first housing 27 that faces the lower end surface of the main body portion 32 when the first and second housings (27, 28) are fitted together, and the spaces between adjacent pressure contact portions 16. For this reason, in this embodiment, five abutment portions 37 are provided lined up in the front-to-rear direction on the lower end surface of the main body portion 32.

The abutment portions 37 are also arranged in a row in the left-right direction on the lower end surface of the main body 32 so as to correspond to all of the magnet wires 100 held by the pair of holding portions 17 of the contacts 26 held in a row in the left-right direction in the first housing 27. Therefore, on the lower end surface of the main body 32, five rows of abutment portions 37 are arranged in a row in the front-rear direction in multiple rows along the left-right direction. In this embodiment, the rows of five abutment portions 37 arranged in a row in the front-rear direction are arranged in six rows along the left-right direction so as to correspond to all of the six magnet wires 100 held by the pair of holding portions 17 of the six contacts 26 held in a row in the left-right direction in the first housing 27.

The abutting portion 37 is configured to abut against the magnet wire 100 held by the pair of holding portions 17 of the contact 26 when the first housing 27 and the second housing 28 are fitted together, and to urge the magnet wire 100. The abutting portion 37 is configured to abut against the magnet wire 100 held by the pair of holding portions 17 when the first and second housings (27, 28) are fitted together, and to urge the magnet wire 100, so that the magnet wire 100 slides along the insertion groove 17a of the holding portion 17 and is displaced relative to the pair of holding portions 17 in the vertical direction. When the magnet wire 100 abuts against the abutting portion 37 and is urged, and slides downward along the insertion groove 17a of the holding portion 17 of the contact 26 and is displaced relative to the pair of holding portions 17, the magnet wire 100 is inserted into each of the slit blades 16a of the four pressure contact portions 16 of the contact 11. Then, the magnet wire 100 slides downward relative to the holding portion 17 and is inserted into the slit blade 16a of the pressure-connecting portion 16, so that the slit blade 16a cuts through the enamel coating of the magnet wire 100 and bites into the core wire of the magnet wire 100, and the pressure-connecting portion 16 is pressure-connected to the magnet wire 100 (see Figures 16(B) and 20). The pressure-connecting portion 16 is pressure-connected to the magnet wire 100, so that the contact 26 is electrically connected to the magnet wire 100.

As described above, the magnet wire connection device 2 is configured such that, when the first housing 27 and the second housing 28 are fitted together, the magnet wire 100 held by the pair of holding portions 17 of the contacts 26 is biased by the abutting portions 37 of the second housing 28. The magnet wire connection device 2 is configured such that, as the magnet wire 100 is biased by the abutting portions 37, the magnet wire 100 is displaced relative to the pair of holding portions 17 while sliding against the insertion grooves 17a of the holding portions 17. Furthermore, the magnet wire connection device 2 is configured such that, as the magnet wire 100 is displaced relative to the pair of holding portions 17 of the contacts 26, the magnet wire 100 is inserted into the slit blades 16a of the four pressure contact portions 16 of the contacts 26. The magnet wire connection device 2 is configured so that when the magnet wire 100 is inserted into the slit blade 16a, the slit blade 16a cuts through the enamel coating of the magnet wire 100 and bites into the core wire of the magnet wire 100, and the pressure-contact portion 16 of the contact 26 is pressure-contacted to the magnet wire 100. When the pressure-contact portion 16 is pressure-contacted to the magnet wire 100, the contact 26 is electrically connected to the magnet wire 100.

Also, referring to FIG. 20, the first housing 27 and the second housing 28 are configured to cover the front end 100a of the magnet wire 100 held by the holding portion 17 of the contact 26 and pressed against the pressure contact portion 16 from both sides in the vertical direction, in a manner that sandwiches the front end 100a. That is, when the first and second housings (27, 28) are fitted together, the front end 100a of the magnet wire 100 is disposed inside the first and second housings (27, 28) in the front-rear direction, and is stored inside the first and second housings (27, 28) without being exposed to the outside. In this way, in the magnet wire connection device 2, the first housing 27 and the second housing 28 are configured to cover the front end 100a of the magnet wire 100 held by the holding portion 17 of the contact 26 from both sides, in a manner that sandwiches the front end 100a.

(Connection operation between magnet wire and magnet wire connection device)
Next, a connection operation when the magnet wire 100 is connected to the magnet wire connection device 2 will be described.

When the magnet wire 100 and the magnet wire connection device 2 are connected, as shown in FIG. 15, first, each of the multiple contacts 26 is inserted into each of the multiple holding holes 29a of the first housing 27 and held in the first housing 27. Then, as shown in FIG. 16(A) and FIG. 17, the magnet wire 100 is held by each pair of holding parts 17 of the multiple contacts 26 held in the first housing 27. When the magnet wire 100 is held by the contacts 26 held in the first housing 27, the magnet wire 100 is inserted into each insertion groove 17a of the pair of holding parts 17 of the contacts 26. When the magnet wire 100 is inserted into the insertion groove 17a of each holding part 17, the pair of arms 17b of each holding part 17 elastically deform to sandwich the magnet wire 100 from both the left and right sides. The pair of arms 17b of each holding portion 17 sandwich the magnet wire 100 from both sides, so that the magnet wire 100 is held by each holding portion 17. This results in the magnet wire 100 being held by the pair of holding portions 17 to the contact 26 held in the first housing 27. In this state, the magnet wire 100 is held by the pair of holding portions 17 while being removed from the slit blade 16a of the pressure contact portion 16.

When the magnet wire 100 is held by the pair of holding portions 17 relative to the contacts 26, the first housing 27 and the second housing 28 are then mated. That is, the first housing 27 and the second housing 28 are mated with each other while the contacts 26 held by the first housing 27 hold the magnet wire 100. When mating the first and second housings (27, 28), the first housing 27 is inserted into the mating opening between the pair of mating frames (34a, 34b) in the second housing 28. This insertion causes the pair of side walls (30a, 30b) of the first housing 27 to be inserted into the through holes (32a, 32b) of the second housing 28, and the plate-shaped main body 29 of the first housing 27 to be housed in the area between the pair of mating frames (34a, 34b) of the second housing 28. Furthermore, the main body 14 of the contact 26 held in the first housing 27 is inserted into and passes through the insertion hole 36 of the second housing 28. This causes the first housing 27 and the second housing 28 to be fitted together, as shown in Figures 12, 19, and 20.

19 and 20, when the first housing 27 and the second housing 28 are mated, the magnet wire 100 held by the pair of holding portions 17 of the contact 26 abuts against the abutment portions 37 of the second housing 28 and is biased. When the magnet wire 100 abuts against the abutment portions 37 and is biased by the abutment portions 37 when the first and second housings (27, 28) are mated, the magnet wire 100 is displaced relative to the pair of holding portions 17 while sliding against the insertion grooves 17a of the holding portions 17. Furthermore, as the magnet wire 100 is displaced relative to the pair of holding portions 17 of the contact 26, the magnet wire 100 is inserted into the slit blades 16a of the four pressure contact portions 16 of the contact 26. Then, when the magnet wire 100 is inserted into the slit blade 16a, the slit blade 16a cuts through the enamel coating of the magnet wire 100 and bites into the core wire of the magnet wire 100, and the pressure-contact portion 16 of the contact 26 is pressure-contacted to the magnet wire 100. When the pressure-contact portion 16 is pressure-contacted to the magnet wire 100, the contact 26 is electrically connected to the magnet wire 100. This completes the connection operation between the magnet wire 100 and the magnet wire connection device 2.

(Functions and Effects of the Second Embodiment)
According to the magnet wire connection device 2 of the second embodiment, the magnet wire 100 is inserted into the insertion grooves 17a of the pair of holding parts 17 of the contacts 26 held in the first housing 27, and the magnet wire 100 is sandwiched between the holding parts 17, so that the magnet wire 100 can be held by the contacts 26. Furthermore, while the magnet wire 100 is held by the contacts 26, the magnet wire 100 can be slid along the insertion grooves 17a and displaced relative to the pair of holding parts 17, so that the magnet wire 100 can be inserted into the slit blades 16a of the pressure contact part 16 disposed between the pair of holding parts 17. Then, by inserting the magnet wire 100 into the slit blades 16a, the enamel coating is broken by the slit blades 16a, and the slit blades 16a are caused to bite into the magnet wire 100, so that the pressure contact part 16 can be pressure-welded to the magnet wire 100. Therefore, according to the second embodiment, the magnet wire 100 can be easily electrically connected to the magnet wire 100 simply by inserting the magnet wire 100 into the pair of holding portions 17 to hold it, and then relatively displacing the magnet wire 100 while sliding it against the pair of holding portions 17. This makes it possible to improve the workability of the work of electrically connecting the magnet wire connection device 2 to the magnet wire 100. In other words, it is not necessary to perform a complicated and time-consuming work of winding the magnet wire 100 around a columnar portion of a housing to hold it as disclosed in Patent Document 1, and it is possible to improve the workability of the work of electrically connecting the magnet wire connection device 2 to the magnet wire 100.

In addition, according to the magnet wire connection device 2, the contact 26 is integrally provided with the pressure-welding portion 16 that is pressure-welded to the magnet wire 100 and a pair of holding portions 17 that are disposed on either side of the pressure-welding portion 16 and hold the magnet wire 100 during pressure-welding. Therefore, the contact 26 that holds the magnet wire 100 and is pressure-welded to the magnet wire 100 while still holding the magnet wire 100 can be constructed from a single component. This makes it possible to reduce the number of components of the contact 26 that is electrically connected to the magnet wire 100.

Therefore, according to the second embodiment, it is possible to provide a magnet wire connection device 2 that can reduce the number of parts of the contacts 26 that are electrically connected to the magnet wire 100 and improve the workability of the work of electrically connecting to the magnet wire 100.

In addition, the magnet wire connection device 2 can easily be configured with a simple structure that forms an insertion groove 17a through which the magnet wire 100 is inserted, and has a holding portion 17 that holds the magnet wire 100 by sandwiching it from both sides, with a pair of arms 17b extending in a cantilevered manner.

In addition, according to the magnet wire connection device 2, the first housing 27 and the second housing 28 are fitted together in a state in which the contacts 26 held by the first housing 27 hold the magnet wire 100 with the pair of holding parts 17. Then, by fitting the first housing 27 and the second housing 28 together, the magnet wire 100 is biased by the second housing 28, and the magnet wire 100 is slid along the insertion groove 17a to be displaced relative to the pair of holding parts 17, so that the magnet wire 100 can be inserted into the slit blade 16a of the pressure contact part 16 arranged between the pair of holding parts 17. Furthermore, by inserting the magnet wire 100 into the slit blade 16a, the enamel coating is broken by the slit blade 16a, and the slit blade 16a is caused to bite into the magnet wire 100, so that the pressure contact part 16 can be pressure-welded to the magnet wire 100. Therefore, according to the second embodiment, the magnet wire 100 is inserted and held in the pair of holding portions 17 of the contacts 26 held in the first housing 27, and the first housing 27 and the second housing 28 are fitted together, so that the magnet wire connection device 2 can be electrically connected to the magnet wire 100 more easily. Therefore, the workability of electrically connecting the magnet wire connection device 2 to the magnet wire 100 can be further improved.

In addition, with the magnet wire connection device 2, the structure for biasing the magnet wire 100 when the first housing 27 and the second housing 28 are mated can be easily configured with a simple structure in which the abutment portion 37 that abuts against the magnet wire 100 is provided on the second housing 28.

In addition, with the magnet wire connection device 2, when the first housing 27 and the second housing 28 are engaged, the tip 100a of the magnet wire 100 held by the holding portion 17 is covered by being sandwiched from both sides. Therefore, when the first housing 27 and the second housing 28 are engaged and the magnet wire connection device 2 is connected to the magnet wire 100, the fracture surface of the tip 100a of the magnet wire 100 can be prevented from being exposed to the outside of the magnet connection device 2. Since the fracture surface of the tip 100a of the magnet wire 100 can be prevented from being exposed to the outside, it is possible to prevent a short circuit from occurring at the tip 100a of the magnet wire 100.

[Modification]
Although the embodiment of the present invention has been described above, the present invention is not limited to the above embodiment, and various modifications are possible within the scope of the claims. For example, the following modifications may be made.

(1) In the above embodiment, a magnet wire connection device having multiple contacts (11, 26) has been described as an example, but this need not be the case. A magnet wire connection device having one contact (11, 26) may also be implemented. Furthermore, even in the case of a magnet wire connection device having multiple contacts (11, 26), the number of contacts (11, 26) does not have to be limited to six as exemplified in the above embodiment, and a magnet wire connection device having five or less contacts (11, 26) or seven or more contacts (11, 26) may also be implemented.

(2) In the above embodiment, an example was described in which four pressure contact portions 16 are provided in the contact (11, 26), but this is not necessarily the case. A configuration in which three or less pressure contact portions 16 or five or more pressure contact portions 16 are provided in the contact (11, 26) may also be implemented.

(3) In the above embodiment, only one pair of retaining portions 17 is provided on the contacts (11, 26), but this is not necessarily the case. At least one pair of retaining portions 17 must be provided on the contacts (11, 26), and multiple pairs of retaining portions 17 may be provided on the contacts (11, 26).

The present invention can be widely applied as a magnet wire connection device that electrically connects to a magnet wire that is configured as an electric wire including a core wire and an enamel coating surrounding the core wire.

Reference Signs List 1, 2: magnet wire connection device 11, 26: contact 12: first housing 13: second housing 16: pressure contact portion 16a: slit blade 17: holding portion 17a: insertion groove 100: magnet wire

Claims (6)

A magnet wire connection device electrically connected to a magnet wire configured as an electric wire including a core wire and an enamel coating therearound,
a contact electrically connected to the magnet wire; and a first housing for holding the contact,
the contact has a pressure contact portion having a slit blade for cutting through the enamel coating and being pressure-contacted to the magnet wire, and a holding portion having an insertion groove through which the magnet wire is inserted and holding the magnet wire by sandwiching the magnet wire inserted into the insertion groove from both sides,
the pressure contact portion and the holding portion of the contact are integrally provided,
the holding portions are provided in a pair and are disposed on both sides of the insulation displacement portion in a direction in which the magnet wire that is pressure-welded to the contact at the insulation displacement portion extends,
A magnet wire connection device characterized in that the magnet wire held by a pair of retaining portions on the contact held by the first housing slides along the insertion groove and is displaced relative to the pair of retaining portions, thereby being inserted into the slit blade of the pressure-connecting portion, the slit blade cuts through the enamel coating and bites into the magnet wire, and the pressure-connecting portion is pressure-connected to the magnet wire. 2. The magnet wire connection device according to claim 1,
The holding portion has a pair of arms extending in a cantilever shape,
The insertion groove is formed as a gap between the pair of arm portions,
The magnet wire connection device is characterized in that the holding portion holds the magnet wire by a pair of the arm portions sandwiching the magnet wire from both sides. 3. The magnet wire connection device according to claim 1,
a second housing connected to the first housing by fitting;
the first housing is configured to be connected to the second housing by fitting with the contacts held by the first housing while the magnet wire is held by the pair of holding portions;
A magnet wire connection device characterized in that, when the first housing and the second housing are fitted together, the magnet wire held by a pair of the retaining portions is biased by the second housing and displaced relative to the pair of the retaining portions while sliding against the insertion groove, thereby being inserted into the slit blade of the pressure contact portion, the slit blade cuts through the enamel coating and bites into the magnet wire, and the pressure contact portion is pressure contacted to the magnet wire. 4. The magnet wire connection device according to claim 3,
the second housing is provided with abutment portions that come into contact with the magnet wire held by the pair of holding portions when the second housing and the first housing are fitted together,
A magnet wire connection device characterized in that the abutment portion is configured to abut against and bias the magnet wire held by a pair of the retaining portions when the second housing and the first housing are fitted together, thereby displacing the magnet wire relative to the pair of the retaining portions. 5. The magnet wire connection device according to claim 4,
A magnet wire connection device, characterized in that the abutting portion is provided with a fitting groove into which the magnet wire fits. 4. The magnet wire connection device according to claim 3,
A magnet wire connection device characterized in that the first housing and the second housing are configured to cover both sides of the tip end of the magnet wire held in the holding portion when fitted together.