CN218241537U - Coil component and drive module - Google Patents

Abstract

The utility model provides a coil part and drive module of difficult skew of coil conductor for magnetic member. A coil component is provided with: a laminate in which a plurality of resin layers are laminated in the vertical direction; a coil having a spiral shape with a central axis extending in the vertical direction and including two or more coil conductors stacked together with a plurality of resin layers in the vertical direction; and a magnetic member which is positioned inside the laminated body so as to overlap the coil when viewed in the vertical direction, one of the vertical directions being a1 st direction and the other being a2 nd direction, one or more coil conductors being positioned closer to the 1 st direction than the magnetic member, one or more resin layers being positioned between the magnetic member and the coil, the magnetic member including: a main body having a plate shape and having a1 st main surface and a2 nd main surface in a2 nd direction from the 1 st main surface; and one or more 1 st protrusions located outside an outer edge region surrounded by an outer edge of the coil, as viewed in the vertical direction, and protruding from the 1 st main surface in the 1 st direction.

Description

Coil component and drive module

Technical Field

The utility model relates to a coil component who possesses coil.

Background

As a conventional invention related to a coil component, for example, a multilayer substrate of patent document 1 is known. The multilayer substrate includes a plurality of base material layers and a plurality of linear conductors. The plurality of base material layers and the plurality of linear conductors are laminated. The plurality of linear conductors are connected to each other to form a coil having a spiral shape.

In the multilayer substrate as described above, the material of the plurality of base material layers is a thermoplastic resin. Therefore, the thermoplastic resin is softened and fluidized by thermocompression bonding, and the plurality of base material layers are welded to each other.

Prior art documents

Patent document

Patent document 1: japanese patent No. 6232976

However, in the field of the multilayer substrate described in patent document 1, there is a demand for a magnetic member to be disposed in the multilayer substrate so as to form a desired magnetic circuit. However, since the thermoplastic resin flows at the time of thermocompression bonding, the linear conductor is easily displaced with respect to the magnetic member. In this case, a desired magnetic path may not be obtained.

SUMMERY OF THE UTILITY MODEL

Problem to be solved by utility model

Therefore, an object of the present invention is to provide a coil component and a driving module in which a coil conductor is less likely to shift with respect to a magnetic member.

Means for solving the problems

In the coil component according to one aspect of the present invention,

one of the up-down directions is a1 st direction, the other of the up-down directions is a2 nd direction,

a coil component is provided with:

a laminate having a structure in which a plurality of resin layers are laminated in the vertical direction;

a coil having a spiral shape surrounding a center axis extending in a vertical direction, the coil including two or more coil conductors stacked in the vertical direction together with the plurality of resin layers; and

a magnetic member that is located inside the laminated body and overlaps with the coil as viewed in the vertical direction,

one or more of the coil conductors are located closer to the 1 st direction than the magnetic member,

one or more of the resin layers are located between the magnetic member and the coil,

the magnetic member comprises a main body and more than one 1 st protrusion,

the main body has a plate shape having a1 st main surface and a2 nd main surface arranged in a vertical direction,

the 2 nd main surface is located closer to the 2 nd direction than the 1 st main surface,

the one or more 1 st protrusions are located outside an outer edge region surrounded by an outer edge of the coil, as viewed in the vertical direction, and protrude from the 1 st main surface in the 1 st direction.

The present invention in another aspect relates to a drive module including:

the coil component described above; and

and a magnet which is positioned closer to the 1 st direction than the coil and overlaps the coil when viewed in the vertical direction.

Effect of utility model

According to the present invention, the coil conductor is less likely to shift with respect to the magnetic member.

Drawings

Fig. 1 is a sectional view of a drive module 10 including a coil component 11.

Fig. 2 is an exploded perspective view of the coil component 11.

Fig. 3 is an exploded perspective view of the coil component 11.

Fig. 4 is a plan view of the coil L and the magnetic member 100.

Fig. 5 is a plan view of the coil L of the coil component 11a and the magnetic member 100.

Fig. 6 is an exploded perspective view of the coil component 11 b.

Fig. 7 is an exploded perspective view of the coil component 11 b.

Fig. 8 is a sectional view of the magnetic member 100 a.

Fig. 9 is a sectional view of the magnetic member 100 b.

Fig. 10 is a sectional view of the magnetic member 100 c.

Fig. 11 is a sectional view of coil component 11 c.

Fig. 12 is a sectional view of the coil component 11 d.

Fig. 13 is a sectional view of the drive module 10 a.

Description of the reference numerals

10. 10a: a drive module;

11. 11a to 11d: a coil component;

12: a laminate;

15a to 15l: a resin layer;

16: a protective layer;

18a to 18h: a coil conductor;

20a, 20b, 22a, 22b: a lead-out conductor;

30: a magnetic sensor;

50: a magnet;

60a, 60b: mounting an electrode;

100. 100a to 100c: a magnetic member;

102: a main body;

104: the 1 st projection;

106. 106a, 106b: a2 nd protrusion;

150: a support mechanism;

a1: an outer edge region;

a2: an inner edge region;

ax1: a central axis;

DIR1: the 1 st direction;

DIR2: a2 nd direction;

h: a through hole;

l: a coil;

op, op1, op2: an opening;

s1: a1 st main surface;

s2: the 2 nd main surface.

Detailed Description

(embodiment mode)

[ Structure of drive Module ]

Hereinafter, the structure of the drive module 10 according to the embodiment of the present invention will be described with reference to the drawings. Fig. 1 is a sectional view of a drive module 10 including a coil component 11. Fig. 2 and 3 are exploded perspective views of the coil component 11. Fig. 4 is a plan view of the coil L and the magnetic member 100.

In the present specification, the direction is defined as follows. The lamination direction of the laminated body 12 of the coil component 11 is defined as the vertical direction. An up direction as one of the up and down directions is a1 st direction DIR1. The lower direction, which is the other of the upper and lower directions, is the 2 nd direction DIR2. The left-right direction and the front-back direction are orthogonal to the up-down direction. The left-right direction is orthogonal to the front-back direction. The vertical direction, the front-rear direction, and the left-right direction in the present embodiment may not coincide with the vertical direction, the front-rear direction, and the left-right direction when the drive module 10 is used.

Hereinafter, X is a component or member of the drive module 10. In the present specification, unless otherwise specified, each part of X is defined as follows. The front part of X means the first half of X. The rear part of X means the rear half of X. The left part of X means the left half of X. The right part of X means the right half of X. The upper part of X means the upper half of X. The lower part of X means the lower half of X. The front end of X means one end of X in the forward direction. The rear end of X means one end in the rear direction of X. The left end of X means one end in the left direction of X. The right end of X means one end in the right direction of X. The upper end of X means an end of X upward. The lower end of X means one end in the downward direction of X. The tip of X means the tip of X and its vicinity. The rear end of X means the rear end of X and its vicinity. The left end of X means the left end of X and its vicinity. The right end of X means the right end of X and its vicinity. The upper end of X means the upper end of X and its vicinity. The lower end of X means the lower end of X and its vicinity.

First, the structure of the drive module 10 and the coil component 11 will be described with reference to fig. 1. The drive module 10 can be used for a wireless communication terminal such as a smartphone, for example.

As shown in fig. 1 to 3, the drive module 10 includes a coil member 11, a magnetic sensor 30, and a magnet 50. The coil component 11 includes a laminate 12, lead conductors 20a, 20b, 22a, and 22b, mounting electrodes 60a and 60b, interlayer connection conductors v8, v11, and v12, a coil L, and a magnetic member 100. As shown in fig. 2 and 3, the laminate 12 has a structure in which resin layers 15a to 15l are laminated in the vertical direction. In the present embodiment, the laminate 12 includes resin layers 15a to 15l and a protective layer 16. The protective layer 16 and the resin layers 15a to 15l are arranged in this order from top to bottom.

As shown in fig. 2 and 3, the resin layers 15a to 15l each have an upper main surface and a lower main surface which are vertically aligned. The resin layers 15a to 15H are provided with through holes H that penetrate the resin layers 15a to 15H in the vertical direction, respectively. The plurality of through holes H have a rectangular shape as viewed in the vertical direction. The plurality of through holes H are connected to each other, thereby forming the cavity Sp of fig. 1. The material of the resin layers 15a to 15l is a thermoplastic resin. The thermoplastic resin is, for example, a liquid crystal polymer, PTFE (polytetrafluoroethylene), or other thermoplastic resin. The material of the resin layers 15a to 15l may be polyimide. Therefore, the material of the laminated body 12 is a nonmagnetic material.

The protective layer 16 is a barrier layer (resist layer). The protective layer 16 is located on the upper main surface of the resin layer 15 a. The protective layer 16 is provided with a through hole H that penetrates the protective layer 16 in the vertical direction. The protective layer 16 protects the coil conductor 18a located on the upper main surface of the resin layer 15 a. The protective layer 16 may be formed by adhering an insulating sheet to the upper main surface of the resin layer 15a, or may be formed by printing an insulating resin paste on the upper main surface of the resin layer 15 a.

The coil L is provided on the laminate 12. As shown in fig. 1, the coil L has a spiral shape around the circumference of a central axis Ax1, the central axis Ax1 extending in the up-down direction. In the present embodiment, the coil L has a spiral shape that moves forward in the upward direction while rotating clockwise. As shown in fig. 2 and 3, the coil L includes coil conductors 18a to 18h and interlayer connection conductors v1 to v7.

The coil conductors 18a to 18h are vertically stacked together with the resin layers 15a to 15 l. More specifically, the coil conductors 18a to 18h are located on the upper main surfaces of the resin layers 15a to 15h, respectively. The coil conductors 18a to 18h surround the center axis Ax1, respectively, as viewed in the up-down direction. In the present embodiment, the coil conductors 18a, 18c, 18e, and 18g have a spiral shape that is centered while being wound counterclockwise, as viewed in the downward direction. The coil conductors 18b, 18d, 18f, and 18h have a spiral shape that surrounds clockwise and approaches the center, as viewed in the downward direction. Hereinafter, the end portions on the outer peripheral side of the coil conductors 18a to 18h are referred to as outer peripheral end portions. The end portions of the coil conductors 18a to 18h on the inner peripheral side are referred to as inner peripheral end portions.

The interlayer connection conductors v1 to v7 penetrate the resin layers 15a to 15g in the vertical direction, respectively. The interlayer connection conductor v1 electrically connects the inner peripheral end of the coil conductor 18a and the inner peripheral end of the coil conductor 18 b. The interlayer connection conductor v2 electrically connects the outer peripheral end of the coil conductor 18b and the outer peripheral end of the coil conductor 18 c. The interlayer connection conductor v3 electrically connects the inner peripheral end of the coil conductor 18c and the inner peripheral end of the coil conductor 18 d. The interlayer connection conductor v4 electrically connects the outer peripheral end of the coil conductor 18d and the outer peripheral end of the coil conductor 18 e. The interlayer connection conductor v5 electrically connects the inner peripheral end of the coil conductor 18e and the inner peripheral end of the coil conductor 18 f. The interlayer connection conductor v6 electrically connects the outer peripheral end of the coil conductor 18f and the outer peripheral end of the coil conductor 18 g. The interlayer connection conductor v7 electrically connects the inner peripheral end of the coil conductor 18g and the inner peripheral end of the coil conductor 18h.

The lead conductor 20a is located on the upper main surface of the resin layer 15 a. The lead conductor 20a is connected to the outer peripheral end of the coil conductor 18 a. Further, the lead conductor 20a extends rightward from the outer peripheral end of the coil conductor 18 a. Thereby, the lead conductor 20a is separated from the orbit of the coil conductors 18a to 18h and is separated from the coil L.

The lead conductor 20b is electrically connected to the coil L. The lead conductor 20b is located above (in the 1 st direction DIR 1) the coil conductor 18h located most below (in the 2 nd direction DIR 2) among the coil conductors 18a to 18h. In this specification, the lead conductor 20b is located above the coil conductor 18h, and includes a case where the lead conductor 20b is located directly above the coil conductor 18h and a case where the lead conductor 20b is located obliquely above the coil conductor 18h. Therefore, the lead conductor 20b may overlap the coil conductor 18h or may not overlap the coil conductor 18h as viewed in the vertical direction. In the present embodiment, the left end of the lead conductor 20b overlaps the outer peripheral end of the coil conductor 18h as viewed in the vertical direction.

The lead conductor 20b is located on the upper main surface of the resin layer 15g. Further, the lead conductors 20b extend in the left-right direction. Thereby, the lead conductor 20b is separated from the orbit of the coil conductors 18a to 18h and is separated from the coil L.

The interlayer connection conductor v8 penetrates the resin layer 15g in the vertical direction. The interlayer connection conductor v8 electrically connects the outer peripheral end of the coil conductor 18h and the left end of the lead conductor 20 b.

As shown in fig. 3, the magnetic member 100 is located inside the laminated body 12. The magnetic member 100 overlaps the coil L as viewed in the up-down direction. In more detail, the magnetic member 100 has a plate shape. Also, the magnetic member 100 is located between the resin layers 15i and 15j. Thus, the coil conductors 18a to 18h are positioned above the magnetic member 100 (the 1 st direction DIR 1). That is, the magnetic member 100 is located lower than the coil L (the 2 nd direction DIR 2). Further, the resin layers 15h, 15i are located between the magnetic member 100 and the coil L. Therefore, the magnetic member 100 does not contact the coil L.

As shown in fig. 1 and 4, the magnetic member 100 includes a body 102, a1 st protrusion 104, and a2 nd protrusion 106. The body 102 has a plate shape having a1 st main surface S1 and a2 nd main surface S2 aligned in the up-down direction. The 2 nd main surface S2 is located lower than the 1 st main surface S1 (the 2 nd direction DIR 2). As shown in fig. 4, the main body 102 has a rectangular shape as viewed in the vertical direction. Wherein an opening Op is provided in the body 102. The opening Op has a rectangular shape as viewed in the up-down direction. The opening Op is located at the center of the body 102.

The 1 st projection 104 is located outside an outer edge area A1 surrounded by the outer edge of the coil L as viewed in the up-down direction. In the present embodiment, the 1 st projection 104 surrounds the outer edge region A1 as viewed in the up-down direction. Therefore, the 1 st projection 104 has a ring shape as viewed in the up-down direction. That is, the 1 st projection 104 is one projection. In the present embodiment, the 1 st projection 104 is located at the outer edge of the main body 102 as viewed in the vertical direction. Therefore, the 1 st projection 104 has a rectangular shape as viewed in the vertical direction. The 1 st projection 104 as described above does not overlap the coil L when viewed in the vertical direction. However, the 1 st projection 104 overlaps the lead conductors 20a, 20b when viewed in the vertical direction.

As shown in fig. 1, such a1 st protrusion 104 protrudes from the 1 st main surface S1 in the upward direction (the 1 st direction DIR 1) and penetrates into the resin layer 15i. In this manner, the resin layer 15i directly contacts the body 102 and is penetrated by the 1 st protrusion 104, which corresponds to the 1 st resin layer of the present invention. The length of the 1 st protrusion 104 in the vertical direction is 1/2 times or more and less than 1 time the thickness D of the resin layer 15i. By setting the length of the 1 st projection 104 in the vertical direction to be 1/2 times or more the thickness D of the resin layer 15i, it is possible to suppress the flow of the resin and to suppress the displacement of the coil conductor at the time of thermocompression bonding of the laminated body 12, so that the coil conductor is less likely to be displaced with respect to the magnetic member. Further, by making the length of the 1 st protrusion 104 in the vertical direction smaller than 1 time the thickness D of the resin layer 15i, the magnetic member 100 and the coil L are less likely to be short-circuited.

The 2 nd projection 106 is located within an inner edge area A2 surrounded by the inner edge of the coil L as viewed in the up-down direction. The 2 nd projection 106 has a ring shape as viewed in the up-down direction. That is, the 2 nd projection 106 is one projection. In the present embodiment, the 2 nd protrusion 106 is located at the outer edge of the opening Op as viewed in the up-down direction. Therefore, the 2 nd projection 106 has a rectangular shape as viewed in the up-down direction. The above-described 2 nd projection 106 does not overlap the coil L when viewed in the vertical direction.

As shown in fig. 1, such a2 nd protrusion 106 protrudes from the 1 st main surface S1 in the upward direction (the 1 st direction DIR 1) and penetrates into the resin layer 15i. The length of the 2 nd protrusion 106 in the vertical direction is 1/2 times or more and less than 1 time the thickness D of the resin layer 15i. By setting the length of the 2 nd projection 106 in the vertical direction to be 1/2 times or more the thickness D of the resin layer 15i, it is possible to suppress the flow of the resin and to suppress the displacement of the coil conductor at the time of thermocompression bonding of the laminated body 12, so that the coil conductor is less likely to be displaced with respect to the magnetic member. In addition, by making the length of the 2 nd protrusion 106 in the vertical direction smaller than 1 time the thickness D of the resin layer 15i, the magnetic member 100 and the coil L become less likely to be short-circuited.

The 1 st protrusion 104 and the 2 nd protrusion 106 as described above are formed by bending a part of the magnetic member 100 in an upward direction.

The material of the magnetic member 100 as described above is a metal magnetic material. The metallic magnetic material is, for example, permalloy, fe-Al-Si alloy, fe or Co-based amorphous metal.

As shown in fig. 3, the mounting electrodes 60a and 60b are located on the upper main surface of the resin layer 15i. Thus, as shown in fig. 1, the mounting electrodes 60a and 60b are positioned on the bottom surface of the cavity Sp. Further, the mount electrodes 60a, 60b overlap the opening Op as viewed in the up-down direction. The mounting electrodes 60a and 60b are arranged in this order from left to right on the upper main surface of the resin layer 15i. The mounting electrodes 60a, 60b have a rectangular shape as viewed in the vertical direction.

As shown in fig. 3, the lead conductor 22a is located on the upper main surface of the resin layer 15 l. The lead conductors 22a extend in the left-right direction. The left end of the lead conductor 22a overlaps the mount electrode 60a when viewed in the vertical direction.

The lead conductor 22b is located on the upper main surface of the resin layer 15k. The lead conductors 22b extend in the left-right direction. The left end of the lead conductor 22b overlaps the mount electrode 60b when viewed in the vertical direction.

The interlayer connection conductor v11 penetrates the resin layers 15i to 15k in the vertical direction. Further, the interlayer connection conductor v11 passes through the opening Op in the up-down direction. The interlayer connection conductor v11 electrically connects the mount electrode 60a and the left end portion of the lead conductor 22 a.

The interlayer connection conductor v12 penetrates the resin layers 15i and 15j in the vertical direction. Further, the interlayer connection conductor v12 passes through the opening Op in the up-down direction. The interlayer connection conductor v12 electrically connects the mount electrode 60b and the left end of the lead conductor 22 b.

The magnetic sensor 30 senses a magnetic force of a magnet 50 described later. As shown in fig. 1, the magnetic sensor 30 is attached to the laminated body 12. Specifically, the magnetic sensor 30 includes a magnetic sensor body 32 and magnetic sensor mounting electrodes 34a, 34b. The magnetic sensor body 32 has a rectangular parallelepiped shape. The magnetic sensor mounting electrodes 34a, 34b are located on the lower main surface of the magnetic sensor body 32. The magnetic sensor mounting electrodes 34a and 34b are fixed to the mounting electrodes 60a and 60b by a conductive bonding material such as solder. Thereby, the magnetic sensor 30 is positioned in the cavity Sp. The magnetic sensor 30 is surrounded by the coil L as viewed in the vertical direction. Although the magnetic sensor 30 includes two magnetic sensor mounting electrodes, it actually includes 4 magnetic sensor mounting electrodes.

As shown in fig. 1, magnet 50 is located above coil L (in the 1 st direction DIR 1). The magnet 50 overlaps the coil L when viewed in the vertical direction. In the present embodiment, the entire magnet 50 is accommodated in a region surrounded by the outer edge of the magnetic member 100 as viewed in the vertical direction. The magnet 50 as described above extends in the left-right direction. The left part of the magnet 50 is an N-pole. The right portion of magnet 50 is the S-pole.

The drive module 10 as described above includes a control circuit not shown. The magnetic sensor 30 and the coil L are electrically connected to a control circuit. The magnetic sensor 30 generates an output signal according to the magnitude of the magnetic force sensed by the magnetic sensor 30. The control circuit controls the magnitude of the current flowing through the coil L based on the output signal generated by the magnetic sensor 30. For example, when a clockwise current flows through the coil L as viewed in a downward direction, a forward current flows through a conductor located on the left portion of the coil L, and a backward current flows through a conductor located on the right portion of the coil L. In the magnet 50, magnetic lines of force are emitted from the N pole, and the magnetic lines of force enter the S pole. Therefore, when a current flows in the forward direction through the conductor located at the left portion of the coil L, the conductor located at the left portion of the coil L is forced in the leftward direction by the lorentz force. When a current flows in the backward direction through the conductor located at the right portion of the coil L, the conductor located at the right portion of the coil L is forced in the leftward direction by the lorentz force. That is, the coil L is forced leftward from the magnet 50. In other words, the magnet 50 is forced in the right direction from the coil L. As a result, the magnet 50 is displaced rightward with respect to the coil L. However, the coil L may be displaced leftward with respect to the magnet 50.

On the other hand, when a counterclockwise current flows through the coil L as viewed in the downward direction, a backward current flows through a conductor located at the left portion of the coil L, and a forward current flows through a conductor located at the right portion of the coil L. When a current flows in the backward direction through the conductor located at the left portion of the coil L, the conductor located at the left portion of the coil L is forced in the rightward direction by the lorentz force. When a current flows in the forward direction through the conductor located on the right portion of the coil L, the conductor located on the right portion of the coil L is forced in the right direction by the lorentz force. That is, the coil L is forced in the right direction from the magnet 50. In other words, the magnet 50 is forced leftward from the coil L. As a result, the magnet 50 is displaced leftward relative to the coil L. As described above, the position of the magnet 50 with respect to the coil L changes according to the magnetic force generated by the coil L. However, the coil L may be displaced rightward with respect to the magnet 50.

[ Effect ]

According to coil component 11, coil conductors 18a to 18h are less likely to shift with respect to magnetic member 100. In more detail, the 1 st projection 104 is located outside the outer edge area A1 surrounded by the outer edge of the coil L as viewed in the up-down direction. Further, as shown in fig. 1, the 1 st protrusion 104 protrudes in the upper direction (1 st direction DIR 1) from the 1 st main surface S1. Accordingly, the 1 st protrusion 104 blocks the flow of the resin layers 15a to 15i in the front-rear direction and the left-right direction during thermocompression bonding of the laminate 12. As a result, the coil conductors 18a to 18h can be prevented from being displaced in the front-rear direction and the left-right direction together with the resin layers 15a to 15i. Therefore, according to coil component 11, coil conductors 18a to 18h are less likely to shift with respect to magnetic member 100. This can prevent the coil conductors 18a to 18h from contacting each other and causing a short circuit in the coil L.

In the coil member 11, the 1 st projection 104 surrounds the outer edge area A1 as viewed in the up-down direction. This can further suppress displacement of the coil conductors 18a to 18h in the front-rear direction and the left-right direction together with the resin layers 15a to 15i. As a result, according to coil component 11, coil conductors 18a to 18h are less likely to be displaced with respect to magnetic member 100.

In the coil member 11, the 1 st projection 104 has a ring shape as viewed in the up-down direction. This can further suppress the coil conductors 18a to 18h from being displaced in the front-rear direction and the left-right direction together with the resin layers 15a to 15i. As a result, according to coil component 11, coil conductors 18a to 18h are less likely to shift with respect to magnetic member 100.

In the coil component 11, the coil conductors 18a to 18h are less likely to be displaced with respect to the magnetic member 100 for the following reason. In more detail, the 2 nd projection 106 is located within an inner edge area A2 surrounded by an inner edge of the coil L as viewed in the up-down direction. The 2 nd protrusion 106 protrudes in the upward direction (1 st direction DIR 1) from the 1 st main surface S1. Thus, the flow of the resin layers 15a to 15i in the front-rear direction and the left-right direction is blocked by the 2 nd protrusions 106 at the time of thermocompression bonding of the laminate 12. As a result, the coil conductors 18a to 18h can be prevented from being displaced in the front-rear direction and the left-right direction together with the resin layers 15a to 15i. As a result, according to coil component 11, coil conductors 18a to 18h are less likely to shift with respect to magnetic member 100.

In the coil component 11, the material of the magnetic member 100 is a metallic magnetic material. Therefore, the magnetic member 100 is harder than the resin layers 15a to 15 l. Therefore, the magnetic member 100 hinders the stacked body 12 from being deformed. As a result, deformation of the coil L can be suppressed, and therefore, variation in characteristics of the coil L can be suppressed, and further, the saturation magnetic density is high, and the coil L can be made thin.

In the coil part 11, the magnetic member 100 includes the 1 st protrusion 104. This increases the moment of inertia of the cross section of the magnetic member 100, and therefore the magnetic member 100 is less likely to bend. Therefore, the magnetic member 100 hinders the stacked body 12 from being deformed. As a result, the deformation of the coil L can be suppressed, and thus the characteristic variation of the coil L can be suppressed.

In the coil component 11, the entire magnet 50 is accommodated in a region surrounded by the outer edge of the magnetic member 100 as viewed in the vertical direction. Thereby, a closed magnetic circuit is formed through the magnet 50 and the magnetic member 100. As a result, the magnetic flux is less likely to leak from the coil component 11. Further, the magnetic flux easily crosses the coil L. As a result, a force is easily applied between the coil L and the magnet 50. Further, the attraction force between the magnet 50 and the magnetic member 100 is nearly uniform.

In the coil component 11, the resin layers 15h, 15i are located between the magnetic member 100 and the coil L. Therefore, the occurrence of a short circuit between the magnetic member 100 and the coil L can be suppressed.

In the coil component 11, the occurrence of a short circuit between the magnetic member 100 and the coil L can be suppressed. In more detail, the lead conductor 20b overlaps the 1 st projection 104 as viewed in the vertical direction. Therefore, the lead conductor 20b is positioned above (in the 1 st direction DIR 1) the coil conductor 18h positioned most below (in the 2 nd direction DIR 2) among the coil conductors 18a to 18h. This increases the distance between the lead conductor 20b and the 1 st projection 104. As a result, the lead conductor 20b is prevented from contacting the 1 st projection 104, and therefore, a short circuit between the magnetic member 100 and the coil L is prevented.

(modification 1)

The coil component 11a according to modification 1 will be described below with reference to the drawings. Fig. 5 is a plan view of the coil L of the coil component 11a and the magnetic member 100.

The coil component 11a is different from the coil component 11 in the shape of the openings Op1, op2. In more detail, the openings Op1, op2 are provided to the magnetic member 100. The openings Op1, op2 have a circular shape as viewed in the up-down direction. The openings Op1, op2 are arranged in order from left to right. The interlayer connection conductors v11, v12 pass through the openings Op1, op2 in the up-down direction, respectively.

The magnetic member 100 includes the 2 nd protrusions 106a, 106b. The 2 nd protrusion 106a is located at the outer edge of the opening Op1 as viewed in the up-down direction. The 2 nd projection 106b is located at the outer edge of the opening Op2 as viewed in the up-down direction. Therefore, the 2 nd projections 106a and 106b have a circular shape, respectively, as viewed in the vertical direction. The other structures of the coil component 11a are the same as those of the coil component 11, and therefore, the description thereof is omitted. The coil component 11a can achieve the same operational effects as the coil component 11.

In the coil part 11a, the openings Op1, op2 are small. This can suppress leakage of magnetic flux to below the magnetic member 100. As a result, in the electronic device to which the coil component 11a is applied, malfunction due to magnetic field noise can be suppressed.

(modification 2)

The following describes a coil component 11b according to modification 2 with reference to the drawings. Fig. 6 and 7 are exploded perspective views of the coil component 11 b.

The coil component 11b is different from the coil component 11 in the structure of the lead conductors 20a, 20 b. In more detail, the coil component 11b does not have the coil conductors 18a, 18h. Further, in the coil member 11b, the lead conductors 20a, 20b are led out to the opening Op as viewed in the up-down direction. In more detail, the lead conductor 20a protrudes from the inner peripheral end portion of the coil conductor 18b into the opening Op. The lead conductor 20b protrudes from the inner peripheral end of the coil conductor 18g into the opening Op. The interlayer connection conductors v31 and v32 pass through the opening Op in the vertical direction. In the coil part 11b, no void Sp is present. The other structure of the coil component 11b is the same as that of the coil component 11, and therefore, the description thereof is omitted. The coil component 11b can achieve the same operational effects as the coil component 11.

(modification 3)

The magnetic member 100a according to modification 3 will be described below with reference to the drawings. Fig. 8 is a sectional view of the magnetic member 100 a.

The magnetic member 100a is different from the magnetic member 100 in the sectional shape and position of the 1 st protrusion 104 and the sectional shape and position of the 2 nd protrusion 106. The 1 st projection 104 and the 2 nd projection 106 are formed by the 1 st main surface S1 projecting in the upward direction and the 2 nd main surface S2 recessed in the upward direction.

Further, the 1 st projection 104 is not located at the outer edge of the main body 102 as viewed in the up-down direction. The 1 st projection 104 exists at a position spaced apart from the outer edge of the body 102. Likewise, the 2 nd protrusion 106 is not located at the outer edge of the opening Op. The 2 nd protrusion 106 exists at a position spaced apart from the outer edge of the opening Op. The other configuration of the magnetic member 100a is the same as the magnetic member 100. Coil components 11, 11a, and 11b including magnetic member 100a can achieve the same operational effects as coil components 11, 11a, and 11b including magnetic member 100.

The 1 st projection 104 and the 2 nd projection 106 as described above can be formed by, for example, raising a part of the 2 nd main surface S2 of the magnetic member 100a upward. That is, the 1 st protrusion 104 and the 2 nd protrusion 106 may be formed by press working.

(modification 4)

The magnetic member 100b according to modification 4 will be described below with reference to the drawings. Fig. 9 is a sectional view of the magnetic member 100 b.

The magnetic member 100b is different from the magnetic member 100 in the sectional shape of the magnetic member 100 b. In the magnetic member 100b, the thickness of the portion other than the vicinity of the outer edge of the body 102 and other than the vicinity of the outer edge of the opening Op is thinner than the thickness of the portion other than the vicinity of the outer edge of the body 102 and the thickness of the portion other than the vicinity of the outer edge of the opening Op. Thus, the 1 st projection 104 is disposed near the outer edge of the body 102. The 2 nd protrusion 106 is disposed near the outer edge of the opening Op. The other configuration of the magnetic member 100b is the same as that of the magnetic member 100. Coil components 11, 11a, and 11b including magnetic member 100b can achieve the same operational effects as coil components 11, 11a, and 11b including magnetic member 100.

The 1 st projection 104 and the 2 nd projection 106 as described above can be formed by collapsing the portions other than the vicinity of the outer edge of the main body 102 and the vicinity of the outer edge of the opening Op in the up-down direction.

(modification 5)

The magnetic member 100c according to the modification 5 will be described below with reference to the drawings. Fig. 10 is a sectional view of the magnetic member 100 c.

The magnetic member 100c is different from the magnetic member 100b in the position of the 1 st protrusion 104 and the position of the 2 nd protrusion 106. The 1 st projection 104 is not located at the outer edge of the main body 102 as viewed in the up-down direction. The 1 st projection 104 exists at a position spaced apart from the outer edge of the body 102. Likewise, the 2 nd protrusion 106 is not located at the outer edge of the opening Op. The 2 nd protrusion 106 exists at a position spaced apart from the outer edge of the opening Op. The other configuration of the magnetic member 100c is the same as that of the magnetic member 100 b. Coil components 11, 11a, and 11b including magnetic member 100c can achieve the same operational effects as coil components 11, 11a, and 11b including magnetic member 100 b.

(modification 6)

Hereinafter, a coil component 11c according to modification 6 will be described with reference to the drawings. Fig. 11 is a sectional view of coil component 11 c.

Coil component 11c is different from coil component 11 in the purpose. More specifically, the coil component 11c is used for short-range wireless communication, for example. In the coil component 11c, the coil L is an antenna for communication. In this case, the magnetic sensor 30 is not required. Therefore, the cavity Sp is not provided in the stacked body 12. The other structures of the coil component 11c are the same as those of the coil component 11, and therefore, the description thereof is omitted. The coil component 11c can achieve the same operational effects as the coil component 11.

The coil component 11c may be used for wireless power transmission. In this case, the coil L is an antenna for power supply.

(modification 7)

Hereinafter, a coil component 11d according to a modification example 7 will be described with reference to the drawings. Fig. 12 is a sectional view of coil component 11 d.

The coil component 11d is different from the coil component 11 in the vertical size of the 1 st projection 104 and the vertical size of the 2 nd projection 106. In more detail, the upper end of the 1 st protrusion 104 is located above the lower end of the coil L. Similarly, the upper end of the 2 nd projection 106 is positioned above the lower end of the coil L. This makes the coil conductors 18a to 18h less likely to be displaced from the magnetic member 100. The other structure of the coil component 11d is the same as that of the coil component 11, and therefore, the description thereof is omitted. The coil component 11d can achieve the same operational effects as the coil component 11.

(modification 8)

The following describes a drive module 10a according to a modification example 8 with reference to the drawings. Fig. 13 is a sectional view of the drive module 10 a.

The drive module 10a is different from the drive module 10 in that it includes a support mechanism 150. The support mechanism 150 is fixed to the stacked body 12. The support mechanism 150 supports the magnet 50 so that the magnet 50 can move in the left-right direction with respect to the stacked body 12. Such a support mechanism 150 may be realized by a combination of a rail and a bearing, or the like.

(other embodiments)

The coil component according to the present invention is not limited to coil components 11, 11a to 11d, and can be modified within the scope of the gist thereof. Further, the structures of the coil members 11, 11a to 11d may be arbitrarily combined.

The coil L has a structure in which a plurality of spiral coil conductors are connected. However, as long as the coil L has a spiral shape, the number of turns of the plurality of coil conductors may be 1 cycle or less.

Further, a protective layer may be provided on the lowermost layer of the laminate 12.

In the drive module 10, the left portion of the magnet 50 may be an S-pole, and the right portion of the magnet 50 may be an N-pole.

The material of the resin layers 15a to 15l may be a magnetic material.

The number of the 1 st protrusions 104 is not limited to one. Therefore, the magnetic members 100, 100a to 100c may include two or more 1 st protrusions 104. For example, a plurality of the 1 st protrusions 104 may also be arranged along the outer edge of the magnetic member 100. Likewise, a plurality of the 2 nd protrusions 106 may also be arranged along the outer edge of the opening Op. Further, the 2 nd protrusion may not surround the opening Op.

The 1 st projection 104 may not surround the outer edge region A1 when viewed in the vertical direction. The 1 st projection 104 may be located only on the right side of the outer edge region A1, for example. In the present specification, the 1 st projection 104 is located on the right side of the outer edge region A1, which means that the 1 st projection 104 is located on the right side of the outer edge region A1, and at least a part of the 1 st projection 104 overlaps the outer edge region A1 as viewed in the left-right direction. This definition is also applicable to directions other than the right direction. However, if one or more 1 st projections 104 are provided on all of the front, rear, left, and right sides of the outer edge area A1, the coil conductors 18a to 18h can be suppressed from being displaced in the front-rear direction and the left-right direction.

In addition, one or more coil conductors may be located above the magnetic member 100 (in the 1 st direction DIR 1). In other words, the coil conductor may be located lower than the magnetic member 100. Therefore, the magnetic member 100 may be located between the coil conductors 18a and 18b, for example. However, if two or more coil conductors are positioned above the magnetic member 100 (in the 1 st direction DIR 1) as in the coil components 11, 11a to 11c, the displacement of the two or more coil conductors from each other can be suppressed.

In addition, it is sufficient that one or more resin layers are located between the magnetic member 100 and the coil L.

In addition, the entire magnet 50 may be accommodated in a region surrounded by the outer edge of the magnetic member 100 as viewed in the vertical direction.

The material of the magnetic members 100, 100a to 100c may not be a metallic magnetic material.

The magnetic members 100, 100a to 100c may not include the 2 nd protrusions 106, 106a, 106b.

The magnetic members 100, 100a to 100c may further include a projection projecting downward from the 2 nd main surface.

In addition, the downward direction may be the 1 st direction DIR1, and the upward direction may be the 2 nd direction DIR2.

In the drive module 10a, the support mechanism 150 may be provided between the case of the electronic device and the coil member 11. That is, the support mechanism 150 is fixed to the housing of the electronic apparatus. The support mechanism 150 supports the coil component 11 so as to be movable in the left-right direction with respect to the housing of the electronic apparatus. At this time, the magnet 50 cannot move relative to the housing of the electronic apparatus.

Claims (12)

1. A coil component characterized in that,

one of the up-down directions is a1 st direction, the other of the up-down directions is a2 nd direction,

a coil component is provided with:

a laminate having a structure in which a plurality of resin layers are laminated in the vertical direction;

a coil having a spiral shape surrounding a center axis extending in a vertical direction, and including two or more coil conductors stacked in the vertical direction together with the plurality of resin layers; and

a magnetic member that is located inside the laminated body, overlapping the coil when viewed in the vertical direction,

one or more of the coil conductors are located closer to the 1 st direction than the magnetic member,

one or more of the resin layers are located between the magnetic member and the coil,

the magnetic member comprises a main body and more than one No. 1 protrusion,

the main body has a plate shape having a1 st main surface and a2 nd main surface arranged in a vertical direction,

the 2 nd main surface is located closer to the 2 nd direction than the 1 st main surface,

the one or more 1 st protrusions are located outside an outer edge region surrounded by an outer edge of the coil, and protrude from the 1 st main surface in the 1 st direction, as viewed in the vertical direction.

2. A coil component as claimed in claim 1,

the two or more coil conductors are located closer to the 1 st direction than the magnetic member.

3. The coil component of claim 1 or claim 2,

the magnetic member is located closer to the 2 nd direction than the coil.

4. The coil component of claim 3,

the coil conductor surrounds the circumference of the central axis as viewed in the up-down direction,

the coil component further includes:

a lead-out conductor which is separated from the coil conductor by being separated from the surrounding track of the coil conductor,

the lead conductor is electrically connected to the coil and is located closer to the 1 st direction than the coil conductor located closest to the 2 nd direction among the two or more coil conductors.

5. The coil component of claim 3,

the plurality of resin layers includes a1 st resin layer in direct contact with the body and penetrated by the one or more 1 st protrusions,

the length of the 1 st protrusion is 1/2 times or more and less than 1 time of the thickness of the 1 st resin layer.

6. The coil component of claim 1 or claim 2,

the one or more 1 st protrusions surround the outer edge region as viewed in the up-down direction.

7. A coil component as claimed in claim 6,

the one or more 1 st protrusions have a ring shape as viewed in the up-down direction.

8. The coil component of claim 1 or claim 2,

the magnetic member further comprises one or more 2 nd protrusions,

the one or more 2 nd protrusions are located in an inner edge region surrounded by an inner edge of the coil when viewed in a vertical direction, and protrude from the 1 st main surface in the 1 st direction.

9. The coil component of claim 1 or claim 2,

the magnetic component is made of a metal magnetic material.

10. The coil component of claim 1 or claim 2,

the coil is an antenna for power supply or communication.

11. A drive module is characterized by comprising:

the coil component of any one of claims 1 to 9; and

and a magnet which is positioned closer to the 1 st direction than the coil and overlaps the coil when viewed in the vertical direction.

12. The drive module of claim 11,

the entire magnet is accommodated in a region surrounded by an outer edge of the magnetic member as viewed in the vertical direction.

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