CN117877867A - Coil device - Google Patents

Abstract

Provided is a coil device wherein the bonding between coil bobbin sections is strengthened. The coil device (10) is provided with a 1 st coil device unit (1101) and a 2 nd coil device unit (1201). The 1 st coil device section (1101) has a 1 st core section (1102), a 1 st coil bobbin section (1107) that houses the 1 st core section (1102), and a 1 st coil section (1114) that has a 1 st winding section (1115) that is wound around the 1 st coil bobbin section (1107). The 2 nd coil device section (1201) has a 2 nd core section (1202), a 2 nd coil bobbin section (1207) accommodating the 2 nd core section (1202), and a 2 nd coil section (1216) having a 2 nd winding section (1217) wound around the 2 nd coil bobbin section (1207). The 1 st coil bobbin (1107) and the 2 nd coil bobbin (1207) have fitting protrusions and fitting recesses, and are firmly coupled by fitting the fitting protrusions and the fitting recesses.

Description

Coil device

Technical Field

The present invention relates to a coil device, and more particularly, to a coil device having a plurality of coil device portions.

Background

The coil device is formed of a wire wound in a spiral or circular shape, and is incorporated into various devices for use. For example, coil devices are used for various devices as inductors, transformers, speakers, microphones, motors, and the like.

Patent document 1 describes an invention in which a plurality of coil functional elements are 1 device. Specifically, patent document 1 describes a transformer in which a transformer and an inductance are integrated as a coil device when a power supply device is configured. The transformer includes a transformer section having a 1 st core and a 2 nd core, and an inductor section having a 3 rd core. With this structure, the system structure can be simplified.

Patent document 1: japanese patent No. 5474893

Disclosure of Invention

Problems to be solved by the invention

However, the transformer described in patent document 1 has room for improvement from the viewpoint of its structure.

Specifically, the transformer described in patent document 1 includes a transformer portion and an inductor portion, but there is no description of a joint structure of a bobbin constituting the transformer portion and a bobbin constituting the inductor portion. Accordingly, the transformer described in patent document 1 has a problem that there is room for improvement in the joint structure of the two coil bobbins.

In the transformer disclosed in patent document 1, if the transformer section and the inductor section are not properly configured, the transformer is rather enlarged, and as a result, a large area is required for installation, which has a problem of preventing downsizing of the device into which the transformer is incorporated.

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a coil device in which the coupling of bobbin portions to each other is enhanced.

Means for solving the problems

The coil device of the present invention is characterized by comprising a 1 st coil device part and a 2 nd coil device part; the 1 st coil device portion includes a 1 st core portion, a 1 st coil bobbin portion accommodating the 1 st core portion, and a 1 st coil portion including a 1 st winding portion wound around the 1 st coil bobbin portion; the 2 nd coil device part has a 2 nd core part, a 2 nd coil bobbin part accommodating the 2 nd core part, and a 2 nd coil part having a 2 nd winding part wound around the 2 nd coil bobbin part; a fitting convex portion is provided on one of the 1 st coil bobbin portion and the 2 nd coil bobbin portion, a fitting concave portion is provided on the other of the 1 st coil bobbin portion and the 2 nd coil bobbin portion, and the fitting convex portion is fitted into the fitting concave portion.

The coil device of the present invention further includes a 3 rd core portion accommodated in the 2 nd bobbin portion; an inductor formed by the 1 st coil device part; the transformer is constituted by the 2 nd coil device portion.

In the coil device according to the present invention, the fitting protrusion is a portion protruding toward a side close to the other side; the fitting recess is a portion recessed toward a side away from the one of the other sides.

In the coil device according to the present invention, the 1 st bobbin portion has a 1 st contact surface that contacts the 2 nd bobbin portion; the 2 nd coil frame part is provided with a 2 nd contact surface which is in contact with the 1 st coil frame part; the fitting convex portion and the fitting concave portion are formed to be inclined with respect to the 1 st contact surface and the 2 nd contact surface.

In the coil device according to the present invention, the one side has an abutting portion protruding toward a side close to the other side; the other side has an abutting receiving portion recessed toward a side away from the one side; the contact portion contacts the contact receiving portion.

In the coil device according to the present invention, the 1 st bobbin portion includes a 1 st winding core portion, a 1 st flange portion formed at each of both ends of the 1 st winding core portion, and a 1 st groove portion in which a side surface of the 1 st flange portion is recessed in a groove shape; the 2 nd coil frame part comprises a 2 nd coil core part, a 2 nd flange part respectively formed at two ends of the 2 nd coil core part and a 2 nd slot part for recessing the side surface of the 2 nd flange part into a slot shape; disposing a 1 st wire constituting the 1 st coil part in the 1 st slot part; the 2 nd wire constituting the 2 nd coil part is disposed in the 2 nd slot part.

In the coil device according to the present invention, the fitting convex portion and the fitting concave portion are formed on the side surfaces of the 1 st and 2 nd flange portions.

In the coil device according to the present invention, the 1 st coil bobbin portion includes a 1 st terminal block portion formed below the 1 st flange portion and a 1 st terminal portion disposed on the 1 st terminal block portion; the 2 nd coil frame part is provided with a 2 nd terminal platform part formed below the 2 nd flange part and a 2 nd terminal part arranged on the 2 nd terminal platform part; the 1 st wire is connected to the 1 st terminal portion; the 2 nd wire is connected to the 2 nd terminal portion.

In the coil device according to the present invention, the end portion of the 2 nd wire is extended downward from the lower end of the 2 nd flange portion.

In the coil device according to the present invention, the 1 st core portion includes a 1 st core base portion and a 1 st core leg portion extending substantially at right angles from the 1 st core base portion; the 2 nd core part has a 2 nd core base part and a 2 nd core leg part extending from the 2 nd core base part at a substantially right angle; the 1 st core base portion and the 2 nd core base portion have a longitudinal direction substantially perpendicular to the mounting surface.

Effects of the invention

According to the coil device of the present invention, the 1 st coil bobbin portion and the 2 nd coil bobbin portion can be joined and the relative positions of the two can be fixed by fitting the fitting convex portion and the fitting concave portion. This can strengthen the connection between the 1 st coil bobbin and the 2 nd coil bobbin, and improve the strength of the coil device itself.

According to the coil device of the present invention, a plurality of coil device portions having different functions can be provided in 1 device, and the added value of the coil device can be increased.

Further, according to the coil device of the present invention, the fitting convex portion is formed on the 1 st bobbin portion having a relatively narrow width by constituting the inductance, and the fitting concave portion is formed on the 2 nd bobbin portion having a relatively wide width by constituting the transformer, so that the 1 st bobbin portion and the 2 nd bobbin portion can be firmly coupled while suppressing a decrease in strength of each bobbin.

Further, according to the coil device of the present invention, the 1 st coil bobbin portion and the 2 nd coil bobbin portion can be firmly coupled by inclining the fitting convex portion and the fitting concave portion with respect to the contact surface.

Further, according to the coil device of the present invention, the contact portion is brought into contact with the contact receiving portion, so that the relative positions of the 1 st coil bobbin portion and the 2 nd coil bobbin portion can be accurately defined.

Further, according to the coil device of the present invention, the 1 st and 2 nd coil portions are provided with the wires constituting the 1 st and 2 nd coil portions, so that the wires can be properly led in the direction of the mounting surface on which the coil device is mounted.

Further, according to the coil device of the present invention, the fitting convex portion and the fitting concave portion can be easily formed on the side surfaces of the 1 st and 2 nd flange portions.

Further, according to the coil device of the present invention, by disposing the 1 st wire led to the 1 st terminal portion in the 1 st slot portion and disposing the 2 nd wire led to the 2 nd terminal portion in the 2 nd slot portion, it is possible to suppress the middle portion of each wire from protruding to the outside.

Further, according to the coil device of the present invention, the 2 nd wire of the portion extending downward from the 2 nd flange portion can be used as the connection terminal.

Further, according to the coil device of the present invention, since the 1 st core base and the 2 nd core base are erected with respect to the mounting surface, the area required for mounting the coil device can be reduced.

Drawings

Fig. 1 is a perspective view showing a coil device according to an embodiment of the present invention.

Fig. 2 is an exploded perspective view showing a coil device according to an embodiment of the present invention.

Fig. 3 is an exploded perspective view showing a coil device according to an embodiment of the present invention from another angle.

Fig. 4A is a diagram showing a coil device according to an embodiment of the present invention, and is a perspective view showing a 1 st coil bobbin section.

Fig. 4B is a diagram showing a coil device according to an embodiment of the present invention, and is a perspective view showing a 2 nd bobbin section.

Fig. 5A is a diagram showing a coil device according to an embodiment of the present invention, and is a diagram showing an example of a circuit in which the coil device is incorporated.

Fig. 5B is a diagram showing a coil device according to an embodiment of the present invention, and is a diagram showing a magnetic circuit formed in the inside of the coil device.

Description of the reference numerals

10 … coil arrangement; 1101 … 1 st coil device part; 1102 …, 1 st core portion; 1103 … iron core base 1; 1104 … core leg 1; 1105 … core leg 1; 1106 … iron core leg 1; 1107 … 1 st coil bobbin part; 1108 … roll 1 core; 1109 … 1 st flange portion; 1110 … 1 st flange portion; 1111 … 1 st slot portion; 1112 … 1 st slot portion; 1113 … 1 st abutment surface; 1114 … 1 st coil part; 1115 … winding 1; 1116 … 1 st wire; 1117 … 1 st terminal block; 1118 … the 1 st terminal block; 1119 … 1 st terminal block; 1120 … 1 st terminal block; 1121 … 1 st terminal portion; 1122 … 1 st terminal portion; 1123 … 1 st terminal portion; 1124 … 1 st terminal part; 1125 and … fitting projections; 1126 … abutment; 1127 … accommodating recess; 1128 … through holes; 1129 … walls; 1201 …, 2 nd coil device portion; 1202 … iron core part 2; 1203 … iron core base part 2; 1204 … iron core leg 2; 1205 … iron core leg 2; 1206 … core leg 2; 1207 and …, 2 nd bobbin portion; 1208 … roll 2 core; 1209 …, 2 nd flange portion; 1210 …, 2 nd flange portion; 1211 … groove 2; 1212 …, 2 nd slot portion; 1213 … groove 2; 1214 … groove 2; 1215 …, 2 nd abutment surface; 1216 … the 2 nd coil part; 1217 … winding part 2; 1218 … wire 2; 1219 … the 2 nd terminal block; 1220 … 2 nd terminal block; 1221 … the 2 nd terminal block; 1222 …, 2 nd terminal block; 1223 … terminal part 2; 1224 nd terminal portion …;1225 … terminal part 2; 1226 and …, 2 nd terminal portion; 1227 and …;1228, …, abutting the landing; 1229, … accommodating recesses; 1230 … accommodating recesses; 1231 … through holes; 13 … 3 rd core part; 131 … 3 rd core base; 132 … core leg 3; 133 … 3 rd core leg; 134 … core leg 3; 14 … mounting surface.

Detailed Description

The coil device 10 according to the embodiment of the present invention will be described in detail below with reference to the drawings. In the following description, the same components are denoted by the same reference numerals in principle, and duplicate descriptions are omitted. In the following description, the coil device 10 will be described in each of the directions of up, down, front, rear, left, and right. Here, the direction in which the coil device 10 is disposed is upward with respect to the mounting surface 14 described later. The direction in which the 1 st coil device portion 1101 and the 2 nd coil device portion 1201 are aligned is the front-rear direction. Further, the left and right are left and right when the coil device 10 is viewed from the front.

Fig. 1 is a perspective view showing a coil device 10 according to an embodiment.

The coil device 10 includes a 1 st coil device portion 1101 and a 2 nd coil device portion 1201. Here, the 1 st coil device portion 1101 and the 2 nd coil device portion 1201 are functionally different. As an example, the 1 st coil device 1101 has a function as an inductance. The 2 nd coil device portion 1201 has a function as a transformer. As will be described later, the coil device 10 is a constituent device that constitutes a part of a resonance power supply. The coil device 10 is used in electronic devices such as air conditioners, vehicles such as passenger cars, and the like.

The 1 st coil device portion 1101 mainly includes a 1 st core portion 1102, a 1 st coil bobbin portion 1107 accommodating the 1 st core portion 1102, and a 1 st coil portion 1114 having a 1 st winding portion 1115 wound around the 1 st coil bobbin portion 1107.

The 2 nd coil device portion 1201 mainly includes a 2 nd core portion 1202, a 2 nd coil bobbin portion 1207 accommodating the 2 nd core portion 1202, and a 2 nd coil portion 1216 including a 2 nd winding portion 1217 wound around the 2 nd coil bobbin portion 1207.

The coil device 10 has a fitting structure for coupling the 1 st bobbin 1107 and the 2 nd bobbin 1207. Specifically, the fitting structure is formed by a fitting convex portion 1125 formed on the 1 st coil bobbin portion 1107 and a fitting concave portion 1227 formed on the 2 nd coil bobbin portion 1207. The fitting structure is described in detail with reference to fig. 2 and the like.

A 1 st terminal portion 1121 and a 1 st terminal portion 1122 are disposed at the lower end of the 1 st coil device portion 1101. Further, at the lower end of the 2 nd coil device portion 1201, a 2 nd terminal portion 1223 and a 2 nd terminal portion 1224 are disposed. These terminals are external connection terminals of the coil device 10, and are mounted on the mounting surface 14 by an insertion structure, soldering, or the like.

The mounting surface 14 is a surface on which the coil device 10 is mounted, and is, for example, a surface constituted by a circuit board or the like.

Fig. 2 is an exploded perspective view showing the coil device 10. Fig. 3 is an exploded perspective view showing the coil device 10 from another angle.

Referring to fig. 2, the coil device 10 mainly includes, from the front side, a 1 st core portion 1102, a 1 st bobbin portion 1107, a 3 rd core portion 13, a 2 nd bobbin portion 1207, and a 2 nd core portion 1202. The 1 st core portion 1102 is inserted into the 1 st bobbin portion 1107, thereby constituting the 1 st coil device portion 1101. The 3 rd core portion 13 and the 2 nd core portion 1202 are inserted into the 2 nd bobbin portion 1207, thereby constituting the 2 nd coil device portion 1201.

The 1 st coil bobbin 1107 is a member made of synthetic resin or the like formed into a predetermined shape, and constitutes a main body of the 1 st coil device 1101. The 1 st coil bobbin 1107 is inserted into the 1 st core 1102, and is capable of winding the 1 st wire 1116 constituting the 1 st coil 1114, and is further shaped so as to form the 1 st terminal 1121 and the like.

Specifically, the 1 st bobbin 1107 mainly includes a 1 st winding core 1108, a 1 st flange 1109 and a 1 st flange 1110 formed at both ends of the 1 st winding core 1108, and a 1 st slot 1111.

The 1 st winding core 1108 is a portion around which the 1 st wire 1116 constituting the 1 st coil part 1114 is wound. When the 1 st coil device 1101 functions as an inductor, the 1 st coil unit 1114 wound around the 1 st coil core unit 1108 has a small number of windings, and therefore the 1 st coil core unit 1108 is formed in a substantially groove shape.

The 1 st flange 1109 is a portion where the front end of the 1 st winding core 1108 is flange-shaped.

The 1 st flange 1110 is a portion where the rear end of the 1 st winding core 1108 is flange-shaped.

Referring to fig. 2, the 1 st groove 1111 is a portion in which the right side surface of the 1 st flange 1110 is partially recessed in a groove shape. The upper end of the 1 st groove 1111 is disposed at a middle portion of the 1 st flange 1110, and is connected to the 1 st winding core 1108. The lower end of the 1 st slot 1111 extends to the lower end of the 1 st flange 1110.

Referring to fig. 3, the 1 st groove 1112 is a portion in which the left side surface of the 1 st flange 1110 is partially recessed in a groove shape. The upper end of the 1 st groove 1112 is disposed at a middle portion of the 1 st flange 1110 and is connected to the 1 st winding core 1108. The lower end of the 1 st slot portion 1112 extends to the lower end of the 1 st flange portion 1110.

The 1 st terminal block 1117, the 1 st terminal block 1118, the 1 st terminal block 1119, and the 1 st terminal block 1120 are formed by forming the lower end of the 1 st bobbin 1107 into a substantially pedestal shape. Referring to fig. 2, the 1 st terminal block 1117 is formed at the right lower end of the 1 st flange 1109, and the 1 st terminal block 1118 is formed at the right lower end of the 1 st flange 1110. Referring to fig. 3, the 1 st terminal block 1119 is formed at the left lower end of the 1 st flange 1109, and the 1 st terminal block 1120 is formed at the left lower end of the 1 st flange 1110.

The 1 st terminal portion 1121, the 1 st terminal portion 1122, the 1 st terminal portion 1123, and the 1 st terminal portion 1124 (see fig. 3) are external connection terminals made of hard copper wires or the like, the upper portions of which are embedded in the 1 st coil bobbin portion 1107. Referring to fig. 2, the 1 st terminal portion 1121 is disposed on the 1 st terminal block 1117, and the 1 st terminal portion 1122 is disposed on the 1 st terminal block 1118. Referring to fig. 3, the 1 st terminal portion 1123 is disposed on the 1 st terminal block 1119, and the 1 st terminal portion 1124 is disposed on the 1 st terminal block 1120.

The wall 1129 is a portion having a substantially wall shape on the front surface of the 1 st bobbin 1107. The wall 1129 is formed in a substantially straight line along the vertical direction. Two wall portions 1129 are formed, and the length of the wall portions 1129 away from each other is set to be equal to the width of the 1 st core portion 1102 in the left-right direction. The wall 1129 accommodates a 1 st core base 1103 of the 1 st core 1102, which will be described later, and fixes the relative positions of the 1 st core 1102 and the 1 st bobbin 1107.

The 1 st contact surface 1113 is a flat surface formed on the rear side of the 1 st bobbin 1107. The 1 st contact surface 1113 contacts a 2 nd contact surface 1215 of the 2 nd bobbin 1207, which will be described later.

The fitting convex portion 1125 is a portion protruding rearward, which is a portion closer to the 2 nd bobbin 1207 on the other side, from the 1 st contact surface 1113 of the 1 st bobbin 1107. The fitting convex portions 1125 are formed in two on both right and left end sides of the 1 st bobbin 1107. The fitting convex portion 1125 is formed at a substantially central portion of the 1 st coil bobbin 1107 in the up-down direction. The fitting convex portion 1125 is formed so as to be inclined with respect to the 1 st contact surface 1113. Specifically, the fitting convex portion 1125 is inclined downward in the rear direction with respect to the 1 st contact surface 1113. By inclining the fitting convex portion 1125 in this manner, fitting with a fitting concave portion 1227 described later is enhanced, and the coupling between the 1 st bobbin 1107 and the 2 nd bobbin 1207 can be further enhanced.

The contact portion 1126 is a portion protruding rearward of the 1 st bobbin 1107 as the 2 nd bobbin 1207. The contact portions 1126 are formed in two on the right and left end sides in the rear-side upper end portion of the 1 st bobbin 1107. The contact portion 1126 has a substantially rectangular parallelepiped shape and protrudes rearward. The contact portion 1126 contacts an abutment receiving portion 1228 of a 2 nd bobbin portion 1207 described later, thereby defining the relative positions of the 1 st bobbin portion 1107 and the 2 nd bobbin portion 1207 as predetermined relative positions in the up-down direction.

As described above, the 1 st wire 1116 is wound around the 1 st winding core portion 1108 of the 1 st bobbin portion 1107 to form an inductance. Referring to fig. 2, one end of the 1 st wire 1116 is wound around the 1 st terminal portion 1122 to be electrically connected. Referring to fig. 3, the other end of the 1 st wire 1116 is electrically connected by being wound around the 1 st terminal portion 1124.

The accommodation recess 1127 is a space formed by making the rear surface of the 1 st bobbin 1107 concave. In the left-right direction, a receiving recess 1127 is formed near the center of the rear surface of the 1 st bobbin 1107. Further, a housing recess 1127 is formed from the upper end to the lower end of the 1 st coil bobbin portion 1107. The shape and size of the recess of the accommodation recess 1127 are substantially the same as those of the front portion of the 3 rd core base 131 of the 3 rd core portion 13 described later. Thereby, the front portion of the 3 rd core base portion 131 of the 3 rd core portion 13 is accommodated so as to be filled in the accommodation recess 1127 of the 1 st coil bobbin portion 1107.

The 2 nd coil device portion 1201 mainly includes a 2 nd core portion 1202, a 2 nd coil bobbin portion 1207 accommodating the 2 nd core portion 1202, and a 2 nd coil portion 1216 including a 2 nd winding core portion 1208 wound around the 2 nd coil bobbin portion 1207.

The 2 nd coil bobbin 1207 is a member made of synthetic resin or the like formed into a predetermined shape, and constitutes a main body of the 2 nd coil device 1201. The 2 nd bobbin portion 1207 is inserted into the 2 nd core portion 1202 and the 3 rd core portion 13, and is capable of winding the 2 nd wire 1218 constituting the 2 nd coil portion 1216, and is further shaped so that the 2 nd terminal portion 1223 and the like can be formed at the lower end thereof.

Specifically, the 2 nd bobbin 1207 mainly includes a 2 nd winding core 1208, 2 nd and 2 nd flange portions 1209 and 1210, and a 2 nd slot portion 1211, etc., which are formed at both ends of the 2 nd winding core 1208, respectively.

The 2 nd winding core 1208 is a portion around which the 2 nd wire 1218 constituting the 2 nd coil portion 1216 is wound. In this embodiment, a three-phase insulated wire is used as the 2 nd wire 1218. When the 2 nd coil device portion 1201 functions as a transformer, the number of windings of the 2 nd coil portion 1216 wound around the 2 nd winding core 1208 is large. Thus, the 2 nd roll core 1208 is longer than the 1 st roll core 1108 described above in the front-rear direction. The 2 nd coil portion 1216 is covered with a resin film, not shown, here.

The 2 nd flange 1209 is a portion where the front end of the 2 nd winding core 1208 is flange-shaped.

The 2 nd flange 1210 is a portion where the rear end of the 2 nd winding core 1208 is flange-shaped.

The 2 nd groove 1211 is a portion in which the right side surface of the 2 nd flange 1209 is partially recessed into a groove shape. The upper end of the 2 nd groove 1211 is disposed at a middle portion of the 2 nd flange 1209, and is connected to the 2 nd winding core 1208. The lower end of the 2 nd slot portion 1211 extends to the lower end of the 2 nd flange portion 1209.

The 2 nd groove 1212 is a portion in which the right side surface of the 2 nd flange 1210 is partially recessed into a groove shape. The upper end of the 2 nd groove 1212 is disposed at a middle portion of the 2 nd flange 1210, and is connected to the 2 nd winding core 1208. The lower end of the 2 nd slot portion 1212 extends to the lower end of the 2 nd flange portion 1210.

Referring to fig. 3, the 2 nd groove 1213 is a portion in which the left side surface of the 2 nd flange 1209 is partially recessed into a groove shape. The upper end of the 2 nd groove 1213 is disposed at a middle portion of the 2 nd flange 1209, and is connected to the 2 nd winding core 1208. The lower end of the 2 nd slot portion 1213 extends to the lower end of the 2 nd flange portion 1209.

Referring to fig. 3, the 2 nd groove 1214 is a portion in which the left side surface of the 2 nd flange 1210 is partially recessed in a groove shape. The upper end of the 2 nd groove 1214 is disposed at a middle portion of the 2 nd flange 1210, and is connected to the 2 nd winding core 1208. The lower end of the 2 nd slot 1214 extends to the lower end of the 2 nd flange 1210.

A 2 nd terminal portion 1223 and the like and a 2 nd terminal block 1219 and the like for supporting the same are disposed near the lower end of the 2 nd coil bobbin portion 1207.

Referring to fig. 2, the right lower end of the 2 nd flange 1209 is formed as a 2 nd terminal block 1219. Further, the right lower end of the 2 nd flange 1210 is formed as a 2 nd terminal block 1220. Referring to fig. 3, the lower left end of the 2 nd flange 1209 is formed as a 2 nd terminal block 1221. The lower left end of the 2 nd flange 1210 is formed as a 2 nd terminal block 1222.

Referring to fig. 2, the 2 nd terminal portion 1223 is an external connection terminal constituted by a hard copper wire or the like, an upper portion of which is buried in the 2 nd terminal block 1219. The end portion of the 2 nd wire 1218 led in the 2 nd groove portion 1211 is wound around the 2 nd terminal portion 1223 to be electrically connected.

Referring to fig. 3, the 2 nd terminal portion 1225 is an external connection terminal made of a hard copper wire or the like, the upper portion of which is embedded in the 2 nd terminal block 1221. The end portion of the 2 nd wire 1218 led in the 2 nd groove portion 1213 is wound around the 2 nd terminal portion 1225 to be electrically connected.

As shown in fig. 2, the 2 nd terminal portion 1224 is an end portion of the 2 nd wire 1218 which protrudes downward from the lower end of the 2 nd groove portion 1212 and constitutes the 2 nd winding portion 1217. As shown in fig. 3, the 2 nd terminal portion 1226 is an end portion of the 2 nd wire 1218 which protrudes downward from an end portion of the 2 nd groove portion 1214 and constitutes the 2 nd winding portion 1217. In the portion of the 2 nd wire 1218 protruding downward, the insulating film covering the periphery of the 2 nd wire 1218 is removed. Since the 2 nd wire 1218 constituting the 2 nd terminal portion 1224 and the 2 nd terminal portion 1226 is made of a thicker wire, the wire itself can be inserted and mounted as a terminal without preparing a terminal portion separately.

The 2 nd contact surface 1215 is a flat surface formed on the front side of the 2 nd bobbin 1207. The 2 nd contact surface 1215 contacts the 1 st contact surface 1113 of the 1 st bobbin 1107.

The fitting recess 1227 is a portion in which a part of the front surface of the 2 nd bobbin section 1207 is recessed toward the rear side, which is the side away from the 1 st bobbin section 1107 as one side. The fitting recess 1227 is formed in two on the right end side and the left end side of the 2 nd bobbin 1207. The shape and size of the recess of the fitting concave 1227 are the same as those of the protrusion of the fitting convex 1125. As described above, the fitting convex portion 1125 of the 1 st bobbin 1107 is fitted into the fitting concave portion 1227 of the 2 nd bobbin 1207. With this structure, the 1 st bobbin 1107 and the 2 nd bobbin 1207 are firmly coupled.

The fitting recess 1227 is formed as a concave portion inclined downward toward the rear with respect to the 2 nd contact surface 1215. Further, the direction and angle of inclination of the fitting concave 1227 are substantially the same as the direction and angle of inclination of the fitting convex 1125 described above. With this configuration, the fitting strength between the fitting concave portion 1227 and the fitting convex portion 1125 is enhanced, and the 1 st coil bobbin 1107 and the 2 nd coil bobbin 1207 can be firmly coupled.

The abutment receiving portion 1228 is a portion in which the front upper end portion of the 2 nd bobbin portion 1207 is recessed toward the rear, which is the side away from the 1 st bobbin portion 1107. The abutment receiving portions 1228 are formed in two on the right and left end sides in the front upper end portion of the 2 nd bobbin 1207. The abutment receiving portion 1228 is recessed rearward to form a space having a substantially rectangular parallelepiped shape. The shape and size of the recess of the contact receiving portion 1228 are the same as the shape and size of the protrusion of the contact portion 1126 described above. As described above, the lower surface of the contact portion 1126 of the 1 st bobbin 1107 contacts the lower surface of the contact receiving portion 1228 of the 2 nd bobbin 1207, and the positional relationship between the 1 st bobbin 1107 and the 2 nd bobbin 1207 is defined as a predetermined position in the up-down direction.

As described above, the transformer is formed by winding the 2 nd wire 1218 around the 2 nd winding core portion 1208 of the 2 nd coil bobbin portion 1207.

The 2 nd wire 1218 constituting the 2 nd coil portion 1216 is connected to the 2 nd terminal portion 1223 and the like. Specifically, referring to fig. 2, one end of the 2 nd wire 1218 is led in the inside of the 2 nd groove portion 1211 and wound around the 2 nd terminal portion 1223 to be electrically connected. The other end of the 2 nd wire 1218 is led around the inside of the 2 nd slot 1212, and led downward from the lower end of the 2 nd slot 1212. Referring to fig. 3, the second end of the second wire 1218 is led into the inside of the second slot 1214, and led downward from the lower end of the second slot 1214. Further, the other end of the 2 nd wire 1218 is led around the inside of the 2 nd groove portion 1213 and wound around the 2 nd terminal portion 1225 to be electrically connected.

The accommodation recess 1229 is a space formed by making the front surface of the 2 nd coil bobbin 1207 concave. In the left-right direction, a receiving recess 1229 is formed near the center of the 2 nd coil bobbin 1207. Further, the accommodation recess 1229 is formed from the upper end to the lower end of the 2 nd coil bobbin portion 1207. The shape and size of the recess of the accommodation recess 1229 are substantially the same as those of the rear portion of the 3 rd core base 131 of the 3 rd core portion 13 described later. Thereby, the rear portion of the 3 rd core base portion 131 of the 3 rd core portion 13 is accommodated so as to be filled in the accommodation recess 1229 of the 2 nd coil bobbin portion 1207.

The accommodating recess 1230 is a space formed by making the rear surface of the 2 nd coil bobbin portion 1207 concave. In the left-right direction, a receiving recess 1230 is formed near the center of the 2 nd coil bobbin portion 1207. Further, the accommodating recess portion 1230 is formed from the upper end to the lower end of the 2 nd coil bobbin portion 1207. The shape and size of the recess of the accommodating recess 1230 are set to be substantially the same as the 2 nd core base 1203 of the 2 nd core portion 1202 described later. Thereby, the 2 nd core base portion 1203 of the 2 nd core portion 1202 is accommodated so as to be filled into the accommodation recess 1230 of the 2 nd coil bobbin portion 1207.

The coil device 10 includes, as cores, a 1 st core portion 1102, a 2 nd core portion 1202, and a 3 rd core portion 13. The 1 st core part 1102 is a core constituting an inductance, and is called an E-core because of its shape. The 2 nd core portion 1202 is a core constituting a transformer, and is called an E-core because of its shape. The 3 rd core portion 13 is a core constituting an inductor and a transformer, and is called an E-core. As a material of these cores, a magnetic material such as amorphous metal, silicon steel sheet, ferrite, or the like can be used.

The 1 st core portion 1102 has a 1 st core base 1103, a 1 st core leg 1104, a 1 st core leg 1105, and a 1 st core leg 1106. The 1 st core base 1103 is a long portion extending in the up-down direction. The 1 st core leg 1104 is a long portion extending substantially at right angles from the upper end of the 1 st core base 1103 toward the rear, and the rear end of the 1 st core leg 1104 abuts against the front surface of the 3 rd core portion 13. The 1 st core leg 1105 is a long portion extending substantially at right angles from the middle portion of the 1 st core base 1103 toward the rear, and the rear end of the 1 st core leg 1105 faces the front surface of the 3 rd core portion 13 with a predetermined gap therebetween. The 1 st core leg 1106 is a long portion extending substantially at right angles rearward from the lower end of the 1 st core base 1103, and the rear end of the 1 st core leg 1106 abuts against the front surface of the 3 rd core portion 13.

The 2 nd core portion 1202 has a 2 nd core base 1203, a 2 nd core leg 1204, a 2 nd core leg 1205, and a 2 nd core leg 1206. The 2 nd core base 1203 is a long portion extending in the up-down direction. The 2 nd core leg 1204 is a long portion extending substantially at right angles from the upper end of the 2 nd core base 1203 toward the front, and the front end of the 2 nd core leg 1204 abuts against the rear end of the 3 rd core leg 132 of the 3 rd core portion 13. The 2 nd core leg 1205 is a long portion extending substantially at right angles from the middle portion of the 2 nd core base 1203 toward the front, and the front end of the 2 nd core leg 1205 is opposed to the rear end of the 3 rd core leg 133 of the 3 rd core portion 13 with a predetermined gap therebetween. The 2 nd core leg 1206 is a long portion extending from the lower end of the 2 nd core base 1203 toward the front substantially at right angles, and the front end of the 2 nd core leg 1206 abuts against the rear end of the 3 rd core leg 134 of the 3 rd core portion 13.

The 3 rd core portion 13 has a 3 rd core base 131, a 3 rd core leg 132, a 3 rd core leg 133, and a 3 rd core leg 134. The 3 rd core base 131 is a long portion extending in the up-down direction. The 3 rd core leg 132 is a long portion extending from the upper end of the 3 rd core base 131 to the rear at a substantially right angle, and the rear end of the 3 rd core leg 132 abuts against the front end of the 2 nd core leg 1204 of the 2 nd core portion 1202. The 3 rd core leg 133 is a long portion extending from the middle portion of the 3 rd core base 131 to the rear at a substantially right angle, and the rear end of the 3 rd core leg 133 is opposed to the front end of the 2 nd core leg 1205 of the 2 nd core 1202 with a predetermined gap therebetween. The 3 rd core leg 134 is a long portion extending from the lower end of the 3 rd core base 131 to the rear at a substantially right angle, and the rear end of the 3 rd core leg 134 is in contact with the front end of the 2 nd core leg 1206 of the 2 nd core portion 1202.

The 1 st core part 1102, the 2 nd core part 1202, and the 3 rd core part 13 are fixed so as not to separate by providing resin films not shown around the 1 st core part 1102, the 2 nd core part 1202, and the 3 rd core part 13.

Here, the 1 st core base 1103 of the 1 st core part 1102, the 3 rd core base 131 of the 3 rd core part 13, and the 2 nd core base 1203 of the 2 nd core part 1202 are set to be substantially perpendicular to the mounting surface 14 shown in fig. 1. The 1 st core leg 1104 and the like of the 1 st core portion 1102, the 3 rd core leg 132 and the like of the 3 rd core portion 13, and the 2 nd core leg 1204 and the like of the 2 nd core portion 1202 extend substantially parallel to the mounting surface 14 shown in fig. 1. By setting the 1 st core part 1102, the 3 rd core part 13, and the 2 nd core part 1202 of the coil device 10 upright with respect to the mounting surface 14, the shape of the coil device 10 in the lateral direction can be reduced. Thereby, the area required for mounting the coil device 10 can be minimized.

Fig. 4A is a perspective view showing the 1 st coil bobbin 1107. The 1 st bobbin 1107 has through holes 1128 formed from the front surface to the rear surface thereof. The through hole 1128 penetrates the 1 st winding core 1108. The through hole 1128 has a shape and size equivalent to those of the 1 st core leg 1105 of the 1 st core portion 1102 shown in fig. 2. The 1 st core leg portion 1105 of the 1 st core portion 1102 is inserted into the through hole 1128 from the front side. Further, the 1 st wire 1116 of the 1 st coil part 1114 described with reference to fig. 2 is wound around the 1 st winding core part 1108.

Fig. 4B is a perspective view showing the 2 nd coil bobbin 1207. The through hole 1231 is a hole penetrating from the front end to the rear end of the 2 nd bobbin 1207. The through hole 1231 also penetrates the inside of the roll 2 core 1208. The through hole 1231 has a shape and size equivalent to those of the 3 rd leg portion 133 of the 3 rd core portion 13 and the 2 nd leg portion 1205 of the 2 nd core portion 1202 shown in fig. 2. The 3 rd core leg 133 of the 3 rd core portion 13 shown in fig. 2 is inserted into the through hole 1231 from the front. Further, the 2 nd core leg 1205 of the 2 nd core 1202 is inserted into the through hole 1231 from the rear. The rear end of the 3 rd core leg 133 and the front end of the 2 nd core leg 1205 face each other with a predetermined gap therebetween in the through hole 1231. Further, the 2 nd wire 1218 of the 2 nd coil portion 1216 described with reference to fig. 2 is wound around the 2 nd winding core 1208.

Fig. 5A is a circuit diagram showing an example of a circuit formed in the coil device 10. As described above, the coil device 10 includes the 1 st coil device portion 1101 and the 2 nd coil device portion 1201. The 1 st coil device 1101 functions as an inductance of the resonant power supply circuit. The 2 nd coil device 1201 functions as a transformer of the resonance power supply circuit. As shown in fig. 1 and the like, the coil device 10 is a device in which a 1 st coil device portion 1101 functioning as an inductance and a 2 nd coil device portion 1201 functioning as a transformer are integrated. By employing the coil device 10, the structure of the resonant power supply circuit can be simplified, and the area of the mounting board occupied by the resonant power supply circuit can be reduced. Fig. 5A shows the position of the 1 st terminal portion 1122 and the like in the circuit formed in the coil device 10.

Fig. 5B is a schematic diagram showing the respective cores of the coil device 10. Here, the direction of the magnetic flux is indicated by an arrow.

As described above, the coil device 10 includes the 1 st core part 1102, the 3 rd core part 13, and the 2 nd core part 1202 from the front side.

In the use state of the coil device 10, if a current flows through the 1 st coil part 1114 and the 2 nd coil part 1216 shown in fig. 2, a predetermined magnetic flux is generated inside the 1 st core part 1102, the 2 nd core part 1202, and the 3 rd core part 13.

When a current flows through the 1 st coil part 1114, magnetic fluxes forming an inductance are generated inside the 1 st core part 1102 and the 3 rd core part 13. The magnetic flux constituting the inductance is mainly generated at the front portion in the 3 rd core base portion 131 of the 3 rd core portion 13.

When a current flows through the 2 nd coil portion 1216, a magnetic flux forming a transformer is generated inside the 2 nd core portion 1202 and the 3 rd core portion 13. This magnetic flux is generated mainly at the rear portion in the 3 rd core base 131 of the 3 rd core portion 13.

With the above configuration, the 3 rd core base 131 of the 3 rd core portion 13 can pass magnetic fluxes constituting both the inductor and the transformer. This can simplify the structure of the coil device 10 functioning as an inductor and a transformer.

The embodiments of the present invention have been described above, but the present invention is not limited to this, and can be modified within the scope not departing from the gist of the present invention. The above-described modes can be combined with each other.

For example, referring to fig. 2 and 3, the end portion of the 2 nd wire 1218 led downward is used as the 2 nd terminal portion 1224 and the 2 nd terminal portion 1226, but these terminals may be configured similarly to the 2 nd terminal portion 1223 shown in fig. 2.

Further, referring to fig. 2 and 3, in the above embodiment, the fitting convex portion 1125 is formed in the 1 st bobbin portion 1107, and the fitting concave portion 1227 is formed in the 2 nd bobbin portion 1207, but the opposite may be adopted. That is, the 1 st coil bobbin 1107 may have a fitting concave portion and the 2 nd coil bobbin 1207 may have a fitting convex portion. With this configuration, the 1 st coil bobbin 1107 and the 2 nd coil bobbin 1207 are satisfactorily joined to each other by the fitting structure.

Claims (10)

1. A coil device is characterized in that,

comprises a 1 st coil device part and a 2 nd coil device part,

the 1 st coil device part has a 1 st core part, a 1 st coil bobbin part accommodating the 1 st core part, and a 1 st coil part having a 1 st winding part wound around the 1 st coil bobbin part,

the 2 nd coil device part has a 2 nd core part, a 2 nd coil bobbin part accommodating the 2 nd core part, and a 2 nd coil part having a 2 nd winding part wound around the 2 nd coil bobbin part,

a fitting convex portion is provided on one of the 1 st coil bobbin portion and the 2 nd coil bobbin portion, a fitting concave portion is provided on the other of the 1 st coil bobbin portion and the 2 nd coil bobbin portion, and the fitting convex portion is fitted into the fitting concave portion.

2. The coil assembly of claim 1 wherein,

and a 3 rd core part accommodated in the 2 nd coil bobbin part,

the 1 st coil device part forms an inductor,

the transformer is constituted by the 2 nd coil device portion.

3. A coil arrangement as claimed in claim 1 or 2, characterized in that,

the fitting convex portion is a portion protruding toward a side close to the other side,

the fitting recess is a portion recessed toward a side away from the one of the other sides.

4. A coil arrangement as claimed in claim 1 or 2, characterized in that,

the 1 st coil frame part has a 1 st contact surface which is in contact with the 2 nd coil frame part,

the 2 nd coil frame part has a 2 nd contact surface which is in contact with the 1 st coil frame part,

the fitting convex portion and the fitting concave portion are formed to be inclined with respect to the 1 st contact surface and the 2 nd contact surface.

5. A coil arrangement as claimed in claim 1 or 2, characterized in that,

one of the two plates has an abutting portion protruding toward a side close to the other plate,

the other has an abutment receiving portion recessed toward a side away from the one,

the contact portion contacts the contact receiving portion.

6. A coil arrangement as claimed in claim 1 or 2, characterized in that,

the 1 st coil bobbin part comprises a 1 st coil core part, a 1 st flange part respectively formed at two ends of the 1 st coil core part, and a 1 st slot part for recessing the side surface of the 1 st flange part into a slot shape,

the 2 nd coil bobbin part comprises a 2 nd coil core part, a 2 nd flange part respectively formed at two ends of the 2 nd coil core part, and a 2 nd slot part for recessing the side surface of the 2 nd flange part into a slot shape,

the 1 st wire constituting the 1 st coil part is disposed in the 1 st slot part,

the 2 nd wire constituting the 2 nd coil part is disposed in the 2 nd slot part.

7. The coil assembly of claim 6 wherein the coil assembly comprises a coil assembly,

the fitting convex portion and the fitting concave portion are formed on the side surfaces of the 1 st flange portion and the 2 nd flange portion.

8. The coil assembly of claim 6 wherein the coil assembly comprises a coil assembly,

the 1 st coil frame part has a 1 st terminal block part formed below the 1 st flange part and a 1 st terminal part arranged on the 1 st terminal block part,

the 2 nd coil frame part has a 2 nd terminal block part formed below the 2 nd flange part and a 2 nd terminal part arranged on the 2 nd terminal block part,

the 1 st wire is connected to the 1 st terminal portion,

the 2 nd wire is connected to the 2 nd terminal portion.

9. The coil assembly of claim 6 wherein the coil assembly comprises a coil assembly,

the end of the 2 nd wire is extended downward from the lower end of the 2 nd flange.

10. A coil arrangement as claimed in claim 1 or 2, characterized in that,

the 1 st core part has a 1 st core base part and a 1 st core leg part extending from the 1 st core base part at a substantially right angle,

the 2 nd core part has a 2 nd core base part and a 2 nd core leg part extending from the 2 nd core base part at a substantially right angle,

the 1 st core base portion and the 2 nd core base portion have a longitudinal direction substantially perpendicular to the mounting surface.