ACTUATOR AND METHOD FOR MANUFACTURING ACTUATOR

Abstract

To provide an actuator which can prevent or suppress disconnection of drawer sections even when tensile force is applied to the drawer sections extending between a winding section of a coil and a substrate.SOLUTION: A support body 3 of an actuator 1 includes: a coil 10 which has a winding section 55 and drawer sections 56, 57; a coil holder 11 which holds the coil 10; and a power feeding substrate 14 which is supported by the coil holder 11. The coil holder 11 has a coil arrangement hole 41 and a substrate support section 50 for supporting the power feeding substrate 14. A first land 15a and a second land 15b, to which the drawer sections 56, 57 are connected, are provided on a substrate surface 14a of the power feeding substrate 14. The substrate support section 50 has recessed sections 85a, 58b at positions overlapping the power feeding substrate 14 when viewed from a direction along the substrate surface 14a. The drawer sections 56, 57 are drawn to pass through the recessed sections 85a, 58b, and have deflection portions 56a, 57a deflecting in the recessed sections 85a, 58b.SELECTED DRAWING: Figure 10

Description

[Technical field]

[0001] The present invention relates to an actuator that moves a movable body by a magnetic drive mechanism having a coil and a magnet, and also to a method for manufacturing such an actuator. [Background technology]

[0002] As a device for reporting information by vibration, an actuator that vibrates a movable body supported by a support by a magnetic drive mechanism has been proposed. The actuator of Patent Document 1 has a movable body, a support, a connector that connects the movable body and the support so that they can move relative to each other, and a magnetic drive mechanism that moves the movable body and the support relative to each other. The movable body includes a magnet. The support includes a coil, a coil holder that holds the coil, and a power supply board fixed to the coil holder. The magnet and the coil face each other in the thickness direction of the winding part of the coil to form a magnetic drive mechanism. An extraction part of the coil wire drawn out from the winding part is connected to a power supply board arranged radially outside the winding part. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2020-102902 A Summary of the Invention [Problem to be solved by the invention]

[0004] The lead-out portion drawn out from the winding portion extends linearly between the winding portion and the power supply board. Therefore, if the actuator is subjected to a strong external impact, such as being dropped, tension is applied to the lead-out portion, which may cause the wire to break. Also, if the actuator is subjected to a thermal change, tension is applied to the coil wire due to its contraction, which may cause the wire to break.

[0005] In view of the above problems, an object of the present invention is to provide an actuator capable of preventing or suppressing breakage of a coil wire even when tension is applied to the coil wire, and to propose a method for manufacturing such an actuator. [Means for solving the problem]

[0006] In order to solve the above problems, the actuator of the present invention includes a winding section and an extracting section extracted from the winding section. Prepare The present invention relates to a coil holder that holds the coil, and a support body having a substrate supported by the coil holder, a movable body having a magnet facing the winding portion, a connecting body that connects the movable body and the support body so that they can move relative to each other, and a magnetic drive mechanism that includes the coil and the magnet and moves the support body and the movable body relative to each other, wherein the coil holder includes a coil holding portion that holds the winding portion, and a substrate support portion that supports the substrate radially outside the coil holding portion, the substrate includes a land on the substrate surface to which the pull-out portion is connected, the substrate support portion includes a recess at a position overlapping with the substrate when viewed from a direction along the substrate surface, and the pull-out portion is pulled from the winding portion to the land via the recess, and includes a bending portion that bends within the recess.

[0007] According to the present invention, the winding portion of the coil is held by a coil holding portion provided on the coil holder, and the substrate is supported by a substrate supporting portion provided on the coil holder. The pull-out portion of the coil, which is pulled out from the winding portion of the coil and connected to a land on the substrate, has a flexure between the winding portion and the land. Therefore, when tension is applied to the pull-out portion due to an impact or thermal change, the flexure extends, preventing the pull-out portion from being pulled between the substrate and the winding portion. This can prevent or suppress breakage of the lead-out portion. Here, the lead-out portion is routed from the winding portion to the land via the recess, and the flexed portion is provided within the recess. This can prevent or suppress the flexed portion from moving on the coil holder and interfering with other members. Also, the recess is provided in the substrate support portion at a position that overlaps with the substrate when viewed from a direction along the substrate surface of the substrate. This allows the flexed portion to be provided in the lead-out portion near the tip portion connected to the land. This can easily suppress excessive load being applied to the tip portion of the lead-out portion fixed to the land by solder when tension is applied to the lead-out portion.

[0008] In the present invention, an adhesive layer for fixing the coil to the coil holder may be provided, the adhesive layer being provided between the winding portion and the coil holding portion, and not provided between the bent portion and the inner wall surface of the recess. In this way, when tension is applied to the drawn-out portion due to an impact or thermal change, the bent portion can freely change. Therefore, it is easy to prevent breakage of the drawn-out portion.

[0009] In the present invention, the coil holding portion is a hole that accommodates the winding portion, and the coil holder has a guide groove that guides the pull-out portion, the guide groove being in communication with the recess and the coil holding portion. By providing such a guide groove, the pull-out portion pulled out from the winding portion can be routed so as to pass through the recess.

[0010] In the present invention, the guide groove may include a first groove portion that is shallower than the recess and is connected to the recess, and a second groove portion that extends from the first groove portion toward the coil holding portion and becomes deeper as it approaches the coil holding portion. In this way, the thickness of the portion of the coil holder where the guide groove is formed can be ensured compared to when the coil holding portion and the recess are connected by a deep guide groove. This makes it easier to ensure the rigidity of the coil holder.

[0011] In the present invention, when the direction in which the winding part and the magnet face each other is defined as a first direction, and two directions perpendicular to the first direction and perpendicular to each other are defined as a second direction and a third direction, the coil holding part and the board support part are arranged in the second direction, the board surface faces the side opposite to the coil holding part in the second direction, the board includes a wiring connection part having the land and a pair of legs protruding from both ends of the wiring connection part in the third direction to one side in the first direction, the board support part includes a pair of slits into which both ends of the board in the third direction are inserted from the other side in the first direction, and an insertion part inserted from one side in the first direction into a notched opening of the board defined by the pair of legs and the wiring connection part, the insertion part includes a tip surface that abuts on the wiring connection part, and the recess is provided on the tip surface. In this way, it is easy to provide the recess at a position that overlaps with the board when viewed from the direction along the board surface.

[0012] In the present invention, the coil holder is made of resin, and the pair of legs include a pair of protrusions that contact the insertion portion from both sides in the third direction, Before the insertion portion is inserted into the notch opening, the pair of protrusions face each other in the third direction, and the distance between the two protrusions in the third direction can be narrower than the width of the insertion portion in the third direction. In this way, when the insertion portion is inserted into the notch opening defined by the pair of legs and the wiring connection portion of the board, the insertion portion is pressed into the notch opening. In other words, the protrusions provided on each of the pair of legs become a press-fit allowance when the insertion portion is inserted into the notch opening. This makes it easier to support the board on the board support portion.

[0013] In this case, the insertion portion includes a pair of inclined surfaces inclined in a direction away from the wiring connection portion toward a direction away from the tip surface on both sides of the tip surface in the third direction, and a pair of side surfaces extending in the first direction from ends of the inclined surfaces opposite the tip surface to the wiring connection portion, In a state before the insertion portion is inserted into the notch opening, the distance between the two protrusions facing each other in the third direction can be wider than the width of the tip surface in the third direction and narrower than the distance between the pair of side surfaces in the third direction. In this way, after the tip surface of the insertion portion is inserted into the notch opening of the board, the insertion portion can be press-fitted between the pair of legs.

[0014] Next, the present invention is characterized in that, in the above-mentioned actuator manufacturing method, the winding portion is held in the coil holding portion of the coil holder, the pull-out portion is pulled out to the opposite side of the coil holding portion of the recess in the second direction, the substrate is placed on the other side of the pair of the slits in the first direction so that the substrate surface faces the opposite side of the coil holding portion in the second direction, both end edges of the substrate in the third direction are inserted into the pair of the slits from the other side of the first direction, and the insertion portion is inserted into the notched opening of the substrate to support the substrate in a temporary support position where each of the pair of protrusions contacts each inclined surface of the insertion portion and a gap is formed between the wiring connection portion and the tip surface, a tip portion of the pull-out portion is connected to the land of the substrate in the temporary support position, and the substrate in the temporary support position is pushed into a support position where each of the pair of protrusions contacts each side surface of the insertion portion and the tip surface abuts the wiring connection portion.

[0015] In the method for manufacturing an actuator of the present invention, the substrate is placed at a temporary support position on the substrate support section, the lead-out section is connected to the substrate, and then the substrate is pushed to one side in a first direction and placed at the support position. When the substrate is moved from the temporary support position to the support position, a deflection occurs on one side in the first direction of the tip portion of the lead-out section connected to the substrate. Furthermore, this deflection is accommodated within a recess located on one side of the substrate in the first direction. This makes it easy to provide the lead-out section with a deflected portion that deflects within the recess. Effect of the Invention

[0016] According to the actuator of the present invention, the lead-out portion of the coil, which is led out from the winding portion of the coil and connected to the land of the substrate, has a flexure between the winding portion and the land. Therefore, when tension is applied to the lead-out portion due to an impact or a thermal change, the flexure extends, and the lead-out portion is prevented from being pulled between the substrate and the winding portion. Therefore, it is possible to prevent or suppress breakage of the lead-out portion. Furthermore, the flexure is flexed in a recess provided in the coil holder. Therefore, it is possible to prevent or suppress the flexure from moving on the coil holder and interfering with other members. Furthermore, the recess is provided in the substrate support portion at a position that overlaps with the substrate when viewed from a direction along the substrate surface of the substrate. This allows the lead-out portion to have a flexure in the vicinity of the tip portion connected to the land. Therefore, when tension is applied to the lead-out portion, it is easy to suppress excessive load from being applied to the tip portion of the lead-out portion fixed to the land by solder.

[0017] Furthermore, in the method for manufacturing an actuator of the present invention, when the substrate connected to the extension portion is moved from the temporary support position to the support position, a deflection occurs on one side in the first direction of the tip portion of the extension portion connected to the substrate. This deflection is accommodated in a recess located on one side in the first direction of the substrate. Therefore, it is easy to provide the extension portion with a deflected portion that deflects within the recess. [Brief description of the drawings]

[0018] [Figure 1] FIG. 1 is a perspective view of an actuator to which the present invention is applied. [Diagram 2] FIG. 2 is a cross-sectional view of the actuator cut in the longitudinal direction. [Diagram 3] FIG. [Figure 4] FIG. 2 is an exploded perspective view of the actuator with the case removed. [Diagram 5] FIG. 2 is an exploded perspective view of the support body with the case removed. [Figure 6] FIG. 6 is an exploded perspective view of the support with the case removed, seen from the opposite side to that in FIG. 5. [Figure 7] FIG. [Figure 8] 5A and 5B are explanatory diagrams of a method for fixing a coil to a coil holder. [Figure 9] 5 is an explanatory diagram of a method of connecting a power supply board and a coil. FIG. [Figure 10] 13 is an explanatory diagram of a state in which the connection between the power supply board and the coil is completed. FIG. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0019] Hereinafter, an embodiment of an actuator to which the present invention is applied will be described with reference to the drawings, and a method for manufacturing the actuator will be described.

[0020] (Overall composition) FIG. 1 is a perspective view of an actuator to which the present invention is applied. FIG. 2 is a cross-sectional view of the actuator cut in the longitudinal direction. FIG. 3 is an exploded perspective view of the actuator. FIG. 4 is an exploded perspective view of the actuator with the case removed. FIG. 5 is an exploded perspective view of the support with the case removed. FIG. 6 is an exploded perspective view of the support with the case removed, viewed from the opposite side to that of FIG. 5. FIG. 7 is a plan view of a coil holder.

[0021] The actuator 1 of this example is used as a tactile device that transmits information by vibration. As shown in FIG. 1, the actuator 1 has a rectangular parallelepiped exterior. The actuator 1 generates vibration in the short side direction of the exterior. In the following description, the short side direction in which vibration occurs is the X direction (third direction), and the longitudinal direction of the actuator 1 and a direction perpendicular to the X direction is the Y direction (second direction). In the following description, the thickness direction of the actuator 1 and a direction perpendicular to the X direction and the Y direction is the Z direction (first direction). The X direction, the Y direction, and the Z direction are perpendicular to each other. In addition, one of the X directions is the X1 direction, and the other is the X2 direction. One of the Y directions is the Y1 direction, and the other is the Y2 direction. One of the Z directions is the Z1 direction, and the other is the Z2 direction.

[0022] 2, the actuator 1 has a support 3 equipped with a case 2 that defines the outer shape, and a movable body 5 housed inside the case 2. The actuator 1 also has a connector 6 and a connector 7 that connect the support 3 and the movable body 5 to be movable relative to each other in the X direction, and a magnetic drive mechanism 8 that moves the movable body 5 and the support 3 relatively in the X direction.

[0023] As shown in Fig. 5 and Fig. 6, the support 3 includes a coil 10, a resin coil holder 11 that holds the coil 10, a first plate 12 that is stacked on the coil holder 11 in the Z1 direction, and a second plate 13 that is stacked on the coil holder 11 in the Z2 direction. The coil 10 has a winding portion 55 in which a coil wire is wound in an oval shape, and a first lead-out portion 56 and a second lead-out portion 57 that are pulled out in the Y1 direction from the outer periphery of the winding portion 55. The thickness direction of the coil 10 is oriented in the Z direction. As shown in Fig. 2, the winding portion 55 of the coil 10 is located at the center in the Z direction within the case 2.

[0024] 1, 3 and 4, the support 3 includes a power supply board 14 (board) held on an end surface in the Y1 direction of the coil holder 11. A first lead-out portion 56 and a second lead-out portion 57 of the coil 10 are connected to a first land 15a and a second land 15b of a wiring pattern 15 provided on a board surface 14a of the power supply board 14. Power is supplied to the coil 10 via the power supply board 14.

[0025] The movable body 5 includes a magnet 16 and a yoke 17. The magnet 16 faces a winding portion 55 of the coil 10 included in the support 3 in the Z direction. constitute a magnetic drive mechanism 8. As shown in Figures 2 and 4, the connecting body 6 and the connecting body 7 are each a rectangular parallelepiped member. The connecting body 6 and the connecting body 7 each have at least one of elasticity and viscoelasticity.

[0026] (movable body) As shown in Figs. 3 and 4, the movable body 5 includes a first magnet 21 and a second magnet 22 as the magnet 16. The first magnet 21 is located in the Z1 direction of the coil 10. The second magnet 22 is located in the Z2 direction of the coil 10. The first magnet 21 and the second magnet 22 are polarized into two in the X direction. The magnetization polarization line of the first magnet 21 extends in the Y direction from the center in the X direction. The magnetization polarization line of the second magnet 22 extends in the Y direction from the center in the X direction.

[0027] The yoke 17 is made of a magnetic material. As shown in FIG. 4, the yoke 17 is constructed by assembling two members, a first yoke 23 and a second yoke 24. The first yoke 23 includes a first plate portion 25 that is long in the Y direction and a pair of connecting plate portions 26 that are curved in the Z2 direction from the center portion in the Y direction toward the outside in the X direction at both ends of the first plate portion 25 in the Y direction and extend in the Z2 direction. The first magnet 21 is held on the Z2 direction surface of the first plate portion 25. The second yoke 24 includes a second plate portion 27 that faces the first plate portion 25 in the Z direction, and a pair of protruding portions 28 that protrude from the middle portion of the second plate portion 27 in the Y direction to the X1 direction and the other side X2. The second magnet 22 is held on the Z1 direction surface of the second plate portion 27. The Z2 direction tip portions of the pair of connecting plate portions 26 are joined to the pair of protruding portions 28 of the second yoke 24 by a method such as welding. As a result, the first yoke 23 and the second yoke 24 are integrated together to form the yoke 17.

[0028] (Support) As shown in FIG. 1 and FIG. 2, the case 2 includes a first case member 31 and a second case member 32 stacked in the Z direction. The first case member 31 is attached to the coil holder 11 from the Z1 direction. The second case member 32 is attached to the coil holder 11 from the Z2 direction. As shown in FIG. 3, the first case member 31 includes a rectangular first plate portion 33 and four side plate portions 34 extending in the Z1 direction from both ends in the X direction of the end portion in the Y1 direction of the first plate portion 33 and both ends in the X direction of the end portion in the Y2 direction of the first plate portion 33. The four side plate portions 34 are located on both sides in the X direction of the coil holder 11. The second case member 32 includes a rectangular second plate portion 35 and a pair of side plate portions 36 extending in the Z2 direction from both ends in the X direction of the second plate portion 35. The pair of side plate portions 36 are located on both sides in the X direction of the coil holder 11.

[0029] As shown in Figures 5 to 7, the coil holder 11 has a plate portion 40 extending in the Y direction. A coil arrangement hole 41 (coil holding portion) is provided in the center of the plate portion 40. The coil arrangement hole 41 is an oval through hole that is long in the Y direction. The coil arrangement hole 41 has a shape into which the winding portion 55 of the coil 10 fits. The winding portion 55 is housed in the coil arrangement hole 41. The coil holder 11 also has cutout portions 42, 43 formed by cutting inward the center portion of the plate portion 40 in the Y direction.

[0030] Furthermore, the coil holder 11 includes a side plate portion 44 protruding in the Z1 and Z2 directions from the X1-direction edge of the plate portion 40 in the Y1 direction of the notches 42, 43, and a side plate portion 45 protruding in the Z1 and Z2 directions from the X2-direction edge of the plate portion 40. Furthermore, the coil holder 11 includes a board support portion 50 at an end portion in the Y1 direction for supporting the power supply board 14. The board support portion 50 and the coil arrangement hole 41 are arranged in the Y direction. The power supply board 14 is supported by the board support portion 50 in an orientation in which the board surface 14a on which the first land 15a and the second land 15b are formed faces the Y1 direction.

[0031] Furthermore, in the Y2 direction of the cutout portions 42, 43, the coil holder 11 includes a side plate portion 47 that protrudes in the Z1 and Z2 directions from the X1 direction edge of the plate portion 40, and a side plate portion 48 that protrudes in the Z1 and Z2 directions from the X2 direction edge of the plate portion 40. The coil holder 11 also includes a side plate portion 49 that protrudes in the Z1 and Z2 directions from the Y2 direction edge of the plate portion 40 and connects the Y2 direction end of the side plate portion 47 and the Y2 direction end of the side plate portion 48.

[0032] Furthermore, the coil holder 11 has a guide groove 53 extending from the coil arrangement hole 41 toward the board support part 50 on the Z2 direction surface of the plate part 40. A first lead-out part 56 and a second lead-out part 57, which are led out in the Y1 direction from the winding part 55 of the coil 10, are routed through the guide groove 53 and connected to the power supply board 14.

[0033] Here, as shown in FIG. 5 and FIG. 6, the power supply board 14 includes a wiring connection part 70 having a rectangular shape elongated in the X direction when viewed from the Y direction, and a pair of legs 71 protruding in the Z1 direction from both ends of the wiring connection part 70 in the X direction. As a result, the power supply board 14 includes a cutout opening 72 defined by the pair of legs 71 and the wiring connection part 70 in the Z1 direction of the wiring connection part 70. As shown in FIG. 5, the wiring connection part 70 includes a wiring pattern 15. The wiring pattern 15 includes a first land 15a and a second land 15b. The pair of legs 71 include a pair of protrusions 73 protruding inward in the X direction midway in the Z direction. As shown in FIG. 6, the inner edges of the pair of legs 71 facing each other in the X direction each include an inclined edge portion 74 inclined in a direction away from each other from the protrusions 73 toward the Z1 direction.

[0034] As shown in FIG. 5 and FIG. 7, the board support part 50 has a pair of slits 51, 52 at the Y1-direction ends of the side plate parts 44, 45 facing each other in the X-direction. Each of the pair of slits 51, 52 extends in the Z-direction. Each of the pair of slits 51, 52 opens in the Z2-direction. The board support part 50 also has a pair of notched recesses 80 recessed in the Z1 and Y2 directions at both ends in the X-direction of the Y1-direction end part of the plate part 40. As a result, the board support part 50 has a protrusion 81 (insertion part) at the center in the X-direction of the Y1-direction end part of the plate part 40. Furthermore, as shown in FIG. 5, the board support part 50 has a connection plate part 82 that extends in the X-direction through the Z1 direction of the pair of notched recesses 80 to connect the Z1-direction end part of the side plate part 44 and the Z1-direction end part of the side plate part 45. The center part of the connection plate part 82 in the X-direction is continuous with the protrusion 81. Furthermore, the substrate support portion 50 is provided with a pair of substrate insertion holes 83 penetrating in the Z1 direction on the inner wall surfaces of the pair of cutout recesses 80 in the Z1 direction.

[0035] The protrusion 81 has a tip surface 85 facing the Z2 direction. The protrusion 81 also has a pair of inclined surfaces 86 on both sides in the X direction of the tip surface 85, which incline in the Z1 direction in a direction away from the tip surface 85 in the X direction. The tip surface 85 is provided with a first recess 85a and a second recess 85b at two locations spaced apart in the X direction. The protrusion 81 also has a pair of side surfaces 87 extending in the Z1 direction from the ends of the inclined surfaces 86 opposite the tip surface 85. The pair of side surfaces 87 extend parallel to the Z direction.

[0036] 4, both end edges in the X direction of the power feeder board 14 are inserted into the slits 51, 52 from the Z2 direction to be supported by the board support part 50. A protrusion 81 provided between a pair of cutout recesses 80 in the plate part 40 serves as an insertion part that is inserted into the cutout opening 72 of the power feeder board 14 from the Z1 direction side when the power feeder board 14 is supported by the board support part 50. In addition, tip portions of each leg part 71 of the power feeder board 14 are inserted into the pair of board insertion holes 83 when the power feeder board 14 is supported by the board support part 50.

[0037] When the power supply board 14 is supported by the board support portion 50, the tip surface 85 of the protrusion 81 abuts against the wiring connection portion 70. Here, the first recess 85a and the second recess 85b provided on the tip surface 85 of the protrusion 81 When viewed from the Z direction (the direction along the substrate surface 14a), the second recess 85b overlaps with the power supply substrate 14. The first recess 85a is located in the Z1 direction of the first land 15a, and the second recess 85b is located in the Z1 direction of the second land 15b.

[0038] In the state before the protrusion 81 is inserted into the notch opening 72, the protrusions 73 provided on the pair of legs 71 of the power supply board 14 face each other in the X direction, and the distance between the two protrusions 73 in the X direction is narrower than the width of the protrusion 81 in the X direction. In other words, in the state before the protrusion 81 is inserted into the notch opening 72 of the power supply board 14, the distance between the two protrusions 73 in the X direction is narrower than the distance between the pair of side surfaces 87 of the protrusion 81. Therefore, when the power supply board 14 is supported by the board support part 50, the protrusion 81 is pressed into the pair of legs 71. That is, the tips of the protrusions 73 of the pair of legs 71 become a press-fit allowance when the protrusion 81 is inserted into the notch opening 72 of the power supply board 14. Therefore, when the power supply board 14 is supported by the board support part 50, at least one of the tips of the protrusions 73 and the side surfaces 87 of the protrusion 81 is scraped off by contact with the other. In this example, the coil holder 11 is made of resin and is softer than the power supply board 14 , so that the side surfaces 87 of the protrusion 81 are scraped off by the tips of the projections 73 of the power supply board 14 .

[0039] 5 and 7, the guide groove 53 communicates with the recesses 85a, 85b of the substrate support portion 50 and the coil arrangement hole 41. The guide groove 53 includes a first groove portion 91 extending linearly from the Y1-direction end of the plate portion 40 via the first recess 85a, a second groove portion 92 extending parallel to the first groove portion 91 from the Y1-direction end of the plate portion 40 via the second recess 85b, and a common groove portion 93 that communicates the Y2-direction end of the first groove portion 91 and the Y2-direction end of the second groove portion 92 with the coil arrangement hole 41. Also, when viewed in a cross section passing through the other side groove portion 92 and the common groove portion 93 in the Y direction, the guide groove 53 includes a first groove portion 95 connected to the second recess 85b at a depth shallower than that of the second recess 85b, a second groove portion 96 extending from the first groove portion 95 toward the coil arrangement hole 41 and deepening as it approaches the coil arrangement hole 41, a third groove portion 97 connecting the second groove portion 96 and the coil arrangement hole 41, and a fourth groove portion 98 extending from the recesses 85a, 58b to the end of the plate portion in the Y1 direction at a depth shallower than that of the first groove portion 95 (see FIG. 9(b)). The third groove portion 97 is provided by cutting the plate portion 40 from the coil arrangement hole 41 in the Y1 direction and penetrates the plate portion 40 in the Z direction. Similarly, when viewed in a cross section passing through the one-side groove portion 91 and the common groove portion 93 in the Y direction, the guide groove 53 includes a first groove portion 95 connected to the first recess 85a at a depth shallower than that of the first recess 85a, a second groove portion 96 extending from the first groove portion 95 toward the coil arrangement hole 41 and deepening as it approaches the coil arrangement hole 41, a third groove portion 97 connecting the second groove portion 96 and the coil arrangement hole 41, and a fourth groove portion 98 extending from the recesses 85a, 58b to the Y1-direction end of the plate portion at a depth shallower than that of the first groove portion 95. The third groove portion 97 is provided by cutting out the plate portion 40 from the coil arrangement hole 41 in the Y1 direction, and penetrates the plate portion 40 in the Z direction.

[0040] 1, 3, and 4, the first lead portion 56 drawn out in the Y1 direction from the winding portion 55 of the coil 10 is routed in the Y1 direction along the common groove portion 93 and one side groove portion 91 of the guide groove 53, and passes between the wiring connection portion 70 of the power supply board 14 and the plate portion 40 (the tip surface 85 of the protrusion 81) in the Y1 direction. Then, the first lead portion 56 is bent in the Z2 direction within the first recess 85a, and is electrically connected to the first land 15a of the power supply board 14. The first lead portion 56 has a bent portion 56a that bends within the first recess 85a. Similarly, the second lead portion 57 drawn out in the Y1 direction from the winding portion 55 of the coil 10 is routed in the Y1 direction along the common groove portion 93 and the other side groove portion 92 of the guide groove 53, and passes in the Y1 direction between the wiring connection portion 70 of the power supply board 14 and the plate portion 40 (the tip surface 85 of the protrusion 81). Then, as shown in Fig. 2, the second lead portion 57 is bent in the Z2 direction within the second recess 85b, and is electrically connected to the second land 15b of the power supply board 14. The second lead portion 57 has a bent portion 57a ​​that bends within the recesses 85a, 58b.

[0041] 5 and 6, the first plate 12 has a rectangular first plate portion 61 covering the plate portion 40 from the Z1 direction, and a plurality of first claw portions 62 protruding obliquely in the Z1 direction outward in the X direction from both sides in the X direction of the first plate portion 61. When the first plate 12 comes into contact with the plate portion 40 of the coil holder 11 from the Z1 direction, the first claw portions 62 are in elastic contact with the side plate portions 44, 45, 47, and 48.

[0042] Further, the second plate 13 has a rectangular second plate portion 63 covering the plate portion 40 from the Z2 direction, and a plurality of second claw portions 64 protruding obliquely in the Z2 direction from both sides in the X direction of the second plate portion 63 toward the outside in the X direction. When the second plate 13 comes into contact with the plate portion 40 of the coil holder 11 from the Z2 direction, the second claw portions 64 are in elastic contact with the side plate portions 44, 45, 47, and 48. The first plate 12 and the third plate 13 are fixed to the coil holder 11 by an adhesive.

[0043] (Connector) As shown in FIG. 2 and FIG. 4, the connectors 6 and 7 each have a rectangular parallelepiped shape extending long in the X direction. The connector 6 is disposed between the first yoke 23 and the first plate 12. More specifically, the connector 6 is made of two members of the same shape, and is sandwiched between the end portion of the first yoke 23 in the Y1 direction and the end portion of the first plate 12 in the Y1 direction, and between the end portion of the first yoke 23 in the Y2 direction and the end portion of the first plate 12 in the Y2 direction. The connector 7 is disposed between the second yoke 24 and the second plate 13. More specifically, the connector 7 is made of two members of the same shape, and is sandwiched between the end portion of the second yoke 24 in the Y1 direction and the end portion of the second plate 13 in the Y1 direction, and between the end portion of the second yoke 24 in the Y2 direction and the end portion of the second plate 13 in the Y2 direction. The connectors 6 and 7 are gel-like members made of silicone gel. The connectors 6 and 7 are compressed in the Z direction between the support body 3 and the movable body 5 .

[0044] Here, in a state where the movable body 5 is supported by the support 3 via the connectors 6 and 7, the winding portion 55 of the coil 10 is disposed between the first magnet 21 and the second magnet 22 in the Z direction. When this state is viewed from the Z direction, the winding portion 55 faces the first magnet 21 in the Z1 direction and faces the second magnet 22 in the Z2 direction. In addition, both end portions in the Y direction of the first plate portion 25 of the first yoke 23 and both end portions in the Y direction of the second plate portion 27 of the second yoke 24 are disposed between the side plate portions 44 and 45 of the coil holder 11 and between the side plate portions 47 and 48 of the coil holder 11 in the X direction. Furthermore, the pair of connecting plate portions 26 of the yoke 17 are located inside the cutout portions 42 and 43 of the coil holder 11. Side plate portion 44, side plate portion 45, side plate portion 47 and side plate portion 48 of coil holder 11 function as a stopper portion that defines the movable range when movable body 5 moves in the X direction.

[0045] (operation) Wiring from a device mounting actuator 1 is connected to wiring pattern 15 of power supply board 14. When a current in a predetermined direction is supplied to coil 10 via power supply board 14, movable body 5 supported by support 3 moves in one direction in the X direction. When the direction of the current is then reversed, movable body 5 moves in the other direction in the X direction. The repeated reversal of the direction of the current supplied to coil 10 causes movable body 5 to vibrate.

[0046] (How to fix the coil to the coil holder) Here, a method of fixing the coil 10 to the coil holder 11 will be described. Fig. 8 is an explanatory diagram of the method of fixing the coil 10 to the coil holder 11. As shown in Fig. 8, when fixing the coil 10 to the coil holder 11, the first plate 12 is overlapped on the plate portion 40 of the coil holder 11 from the Z1 direction. As a result, the first plate 12 is supported by the coil holder 11 in a state in which the coil arrangement hole 41 is blocked from the Z1 direction.

[0047] Next, the winding portion 55 of the coil 10 is placed in the coil arrangement hole 41. Then, the central hole 10a of the winding portion 55 is filled with adhesive 58. Thereafter, the second plate 13 is placed on the plate portion 40 of the coil holder 11 from the Z2 direction and supported by the coil holder 11.

[0048] The adhesive 58 filled in the central hole 10a of the winding portion 55 flows between the winding portion 55 and the first plate 12 in the Z1 direction of the winding portion 55, flows into the gap between the first plate 12 and the plate portion 40 of the coil holder 11, and further flows between the winding portion 55 and the inner wall surface of the coil arrangement hole 41. In addition, the adhesive 58 flows between the winding portion 55 and the second plate 13 in the Z2 direction of the winding portion 55, flows into the gap between the second plate 13 and the plate portion 40 of the coil holder 11, and further flows between the winding portion 55 and the inner wall surface of the coil arrangement hole 41. Therefore, as shown in FIG. 2, when the adhesive 58 is cured, the winding portion 55 is fixed to the inner wall surface of the coil arrangement hole 41 in the plate portion 40 by the adhesive layer 59 formed by the cured adhesive 58. In addition, the first plate 12 is fixed to the plate portion 40 of the coil holder 11 by the adhesive layer 59. Furthermore, the second plate 13 is fixed to the plate portion 40 of the coil holder 11 by an adhesive layer 59 .

[0049] Here, the adhesive 58 filled in the central hole 10a of the winding portion 55 also flows into the guide groove 53, but remains in the common groove portion 93 connected to the coil arrangement hole 41. That is, the adhesive 58 remains in the third groove portion 97 that is in communication with the coil arrangement hole 41 and penetrates in the Z direction in the common groove portion 93, or in the second groove portion 96 that is located in the Y1 direction of the third groove portion 97 and becomes deeper as it approaches the coil arrangement hole 41. Therefore, the adhesive 58 does not flow in the Y1 direction further than the first groove portion 95. Therefore, the adhesive layer 59 obtained by hardening the adhesive 58 is not provided between the bending portions 56a, 57a of the respective drawing portions 56, 57 and the inner wall surfaces of the recesses 85a, 58b. (How to connect the coil to the power supply board) Next, a method of connecting the coil held by the coil holder 11 to the power supply board 14 will be described with reference to Fig. 9 and Fig. 10. Fig. 9 is an explanatory diagram of a state in which each lead-out portion is connected to the power supply board 14 at the temporary support position. Fig. 10 is an explanatory diagram of a state in which the power supply board 14 to which each lead-out portion is connected is moved from the temporary support position to the support position. Figs. 9(a) and 10(a) are front views of the power supply board 14 and the coil holder 11 as viewed from the Y1 direction side, and Figs. 9(b) and 10(b) are cross-sectional views of the power supply board 14 and the coil holder 11 passing through the other-side groove portion 92 and the common groove portion 93 in the Y direction.

[0050] The coil 10 and the power supply board 14 are connected with the winding portion 55 of the coil 10 housed in the coil arrangement hole 41. In this state, the first lead-out portion 56 and the second lead-out portion 57 of the coil 10 are routed in the Y1 direction along the guide groove 53. The tip portion of the first lead-out portion 56 and the tip portion of the second lead-out portion 57 are respectively drawn out in the Y1 direction beyond the first recess 85a and the second recess 85b of the board support part 50.

[0051] When connecting the coil 10 and the power supply board 14, first, the power supply board 14 is placed in the Z2 direction of the board support part 50, and the board surface 14a is oriented in the Y1 direction. Then, both ends of the power supply board 14 in the X direction are inserted into the pair of slits 51 and 52. Also, the protrusion 81 (insertion part) is inserted into the cutout opening 72 of the power supply board 14, and the power supply board 14 is supported at the temporary support position 14A where the pair of protrusions 73 contact the respective inclined surfaces 86 of the protrusion 81, and a gap is formed between the wiring connection part 70 and the tip surface 85. This state is the state shown in FIG. 9, and a gap is formed between the plate part of the coil holder 11 and the wiring connection part 70 of the power supply board 14. Also, the tip part of the first lead part 56 and the tip part of the second lead part 57 pass through the gap in the Y1 direction.

[0052] Here, the first drawer section 56 and the second drawer section 57 are arranged at the temporary support position 14A. 9B, when each of the lead-out portions 56, 57 is connected to the lands 15a, 15b, each of the lead-out portions 56, 57 extends in the guide groove 53 in the Y1 direction, passes through the recesses 85a, 58b in the Z1 direction, and then curves in the Z2 direction along the lower edge of the wiring connection portion 70 of the power supply board 14.

[0053] Next, the power supply board 14 at the temporary support position 14A is pushed in the Z1 direction. Then, as shown in FIG. 10, the power supply board 14 is positioned at the support position 14B where the pair of protrusions 73 provided on each of the pair of legs 71 contact the pair of side surfaces 87 of the protrusion 81 (insertion portion) and the tip surface 85 of the protrusion 81 abuts the wiring connection portion 70. Here, the tip of each of the protrusions 81 provided on the pair of legs 71 becomes a press-fit allowance when the power supply board 14 is inserted into the protrusion 81. Therefore, while the power supply board 14 at the temporary support position 14A moves to the support position 14B, the protrusion 81 is pressed into the notch opening 72 of the power supply board 14. Also, each side surface 87 of the protrusion 81 is scraped off by the tip of each of the protrusions 81.

[0054] Furthermore, when the power feeder board 14 at the temporary support position 14A is press-fitted into the support position 14B, the drawers 56, 57 are bent in the Z1 direction of the power feeder board 14 in association with the movement of the power feeder board 14 in the Z1 direction, and the bent portions 56a, 57a of the drawers 56, 57 thus generated are accommodated in the recesses 85a, 58b. Thus, the drawers 56, 57 have the bent portions 56a that bend within the recesses 85a, 58b.

[0055] (Action and effect) According to this example, the winding portion 55 of the coil 10 and the power supply board 14 are fixed to the coil arrangement hole 41 and the board support portion 50 provided in the coil holder 11. In addition, the lead-out portions 56 and 57 of the coil 10, which are led out from the winding portion 55 of the coil 10 and connected to the lands 15a and 15b of the power supply board 14, have bending portions 56a and 57a between the winding portion 55 and the lands 15a and 15b. Therefore, when tension is applied to the lead-out portions 56 and 57 due to an impact or a thermal change, the bending portions 56a and 57a extend, and the lead-out portions 56 and 57 can be prevented from being pulled between the power supply board 14 and the winding portion 55. As a result, the lead-out portions 56 and 57 can be prevented or suppressed from being broken.

[0056] Here, the coil 10 and the power supply board 14 are held by the coil holder 11, and the bending portions 56a, 57a are provided in the recesses 85a, 58b provided in the coil holder 11. Therefore, it is possible to prevent or suppress the bending portions 56a, 57a from moving on the coil holder 11 and interfering with other members.

[0057] Furthermore, the recesses 85a, 58b are provided in the board support portion 50 at positions overlapping with the power feeder board 14 when viewed from a direction along the board surface 14a of the power feeder board 14. As a result, the lead-out portions 56, 57 are provided near the tip portions connected to the lands 15a, 15b of the power feeder board 14. Therefore, when tension is applied to the lead-out portions 56, 57, it is easy to prevent excessive load from being applied to the tip portions of the lead-out portions 56, 57 fixed to the lands 15a, 15b by solder.

[0058] In this example, the adhesive layer 59 that fixes the coil 10 to the coil holder 11 is provided between the winding portion 55 and the coil arrangement hole 41, but is not provided between the bent portions 56a, 57a and the inner wall surfaces of the recesses 85a, 58b. Therefore, when tension is applied to the lead-out portions 56, 57 due to an impact or thermal change, the bent portions 56a, 57a can freely deform. This makes it easy to prevent breakage of the lead-out portions 56, 57.

[0059] In this example, the coil holder 11 is provided with a guide groove 53 that guides the lead-out portions 56 and 57. The guide groove 53 communicates with the recesses 85a and 58b and the coil arrangement hole 41. Therefore, The lead-out portions 56 and 57 led out from the winding portion 55 can be routed so as to pass through the recesses 85a and 58b.

[0060] Further, the guide groove 53 includes a first groove portion 95 connected to the recesses 85a, 58b at a depth shallower than that of the recesses 85a, 58b, and a second groove portion 96 extending from the first groove portion 95 toward the coil arrangement hole 41 and deepening as it approaches the coil arrangement hole 41. Therefore, compared with the case where the coil arrangement hole 41 and the recesses 85a, 58b are connected by a deep guide groove 53, the thickness of the portion in the coil holder 11 where the guide groove 53 is formed can be ensured. This makes it easier to ensure the rigidity of the coil holder 11. In addition, since the first groove portion 95 connected to the recesses 85a, 58b is shallower than the recesses 85a, 58b, it is possible to prevent or suppress the adhesive 58 for fixing the winding portion 55 of the coil 10 to the coil holder 11 from reaching the recesses 85a, 58b from the coil arrangement hole 41. This makes it possible to avoid providing an adhesive layer 59 between the lead-out portions 56, 57 and the recesses 85a, 58b.

[0061] In this example, the power supply board 14 includes a wiring connection part 70 including lands 15a and 15b, and a pair of legs 71 protruding from both ends of the wiring connection part 70 in the X direction to one side in the first direction. The board support part 50 includes a pair of slits 51 and 52 into which both ends of the power supply board 14 in the X direction are inserted from the other side in the first direction, and a protrusion 81 inserted from one side in the first direction into a notched opening 72 of the power supply board 14 defined by the pair of legs 71 and the wiring connection part 70. The protrusion 81 includes a tip surface 85 that abuts against the wiring connection part 70, and the recesses 85a and 58b are provided on the tip surface 85. Therefore, it is easy to provide the recesses 85a and 58b at a position that overlaps with the power supply board 14 when viewed from the direction along the board surface 14a.

[0062] Here, the pair of legs 71 of the power supply board 14 includes a pair of protrusions 73 that contact the protrusion 81 from both sides in the X direction. In addition, in the power supply board 14, before the protrusion 81 is inserted into the cutout opening 72, the pair of protrusions 73 face each other in the X direction, and the distance between the two protrusions 73 in the X direction is narrower than the width of the protrusion 81 in the X direction. Therefore, when the protrusion 81 is inserted into the cutout opening 72 of the power supply board 14, the protrusion 81 is press-fitted into the cutout opening 72. That is, the pair of protrusions 73 become a press-fit allowance when the protrusion 81 is inserted into the cutout opening 72. This makes it easy to support the power supply board 14 on the board support part 50.

[0063] Moreover, the protrusion 81 includes a pair of inclined surfaces 86 on both sides of the tip surface 85 in the X direction, which are inclined in a direction away from the tip surface 85 and away from the wiring connection portion 70, and a pair of side surfaces 87 extending in the first direction from the end of each inclined surface 86 opposite the tip surface 85 to the opposite side to the wiring connection portion 70. Moreover, in the power supply board 14, before the protrusion is inserted into the opening, the distance between the two protrusions 73 facing each other in the X direction is wider than the width of the tip surface 85 in the X direction and narrower than the distance between the pair of side surfaces 87 in the X direction. Therefore, the protrusion 81 can be easily press-fitted into the cutout opening 72 of the power supply board 14.

[0064] Furthermore, in this example, when connecting each lead-out portion 56, 57 of the coil 10 to the power supply board 14, the lead-out portions 56, 57 are connected to the power supply board 14 in a state where the power supply board 14 is arranged at the temporary support position 14A, and then the power supply board 14 is pushed in the Z1 direction and arranged at the support position 14B. Here, when the power supply board 14 is moved from the temporary support position 14A to the support position 14B, bending occurs in the lead-out portions 56, 57 connected to the power supply board 14. In addition, this bending is accommodated in the recesses 85a, 58b located in the Z1 direction of the power supply board 14. Therefore, it is easy to provide the lead-out portions 56a, 57a in the lead-out portions 56, 57 that bend within the recesses 85a, 58b. [Explanation of symbols]

[0065] 1...actuator, 2...case, 3...support, 5...movable body, 6, 7...connecting body, 8...magnetic drive mechanism, 10...coil, 10a...center hole, 11...coil holder, 12...first plate, 13...second plate, 14...power supply board, 14a...board surface, 14A...temporary support position, 14B...support position, 15...wiring pattern, 15a...first land, 15b...second land, 16...magnet, 17...yoke, 21...first magnet, 22...second magnet, 23...first yoke, 24...second yoke, 25...first plate portion, 26...connecting plate portion, 27...second plate portion, 28...projecting portion, 31...first case member, 32...second case member, 33...first plate portion, 34...side plate portion, 35...second plate portion, 40...plate portion, 41...coil arrangement hole (coil holding portion), 42, 4 3...notch portion, 44, 45, 47, 48, 49...side plate portion, 50...substrate support portion, 51, 52...slit, 53...guide groove, 55...winding portion, 56...first lead-out portion, 56a...flexed portion, 57...second lead-out portion, 57a...flexed portion, 59...adhesive layer, 61...first plate portion, 62...first claw portion, 63...second plate portion, 64...second claw portion, 70...wiring connection portion, 71...leg portion, 72...cut Notched opening, 73...projection, 74...inclined edge portion, 80...notched recess, 81...projection (insertion portion), 82...connection plate portion, 83...board insertion hole, 85...tip surface, 85a...first recess, 85b...second recess, 86...inclined surface, 87...side surface, 91...one side groove portion, 92...other side groove portion, 93...common groove portion, 95...first groove portion, 96...second groove portion, 97...third groove portion, 98...fourth groove portion

Claims

1. a support including a coil having a winding portion and an extracting portion extracted from the winding portion, a coil holder for holding the coil, and a substrate supported by the coil holder; a movable body including a magnet facing the winding portion; a connector that connects the movable body and the support body so as to be movable relative to each other; a magnetic drive mechanism including the coil and the magnet, and configured to move the support body and the movable body relative to each other; the coil holder includes a coil holding portion that holds the winding portion, and a substrate support portion that supports the substrate on a radially outer side of the coil holding portion, the substrate includes a land on a surface thereof to which the lead portion is connected; the substrate support portion includes a recess at a position overlapping the substrate when viewed from a direction along the surface of the substrate, The actuator, wherein the lead-out portion is routed from the winding portion to the land via the recess, and has a bending portion that bends within the recess.

2. an adhesive layer for fixing the coil to the coil holder; 2. The actuator according to claim 1, wherein the adhesive layer is provided between the winding portion and the coil holding portion, and is not provided between the bending portion and an inner wall surface of the recess.

3. the coil holding portion is a hole that accommodates the winding portion, the coil holder includes a guide groove for guiding the lead-out portion, 3. The actuator according to claim 1, wherein the guide groove communicates with the recess and the coil holding portion.

4. 4. The actuator according to claim 3, wherein the guide groove comprises a first groove portion connected to the recess at a depth shallower than that of the recess, and a second groove portion extending from the first groove portion toward the coil holding portion and becoming deeper as it approaches the coil holding portion.

5. When a direction in which the winding portion and the magnet face each other is defined as a first direction, and two directions that are perpendicular to the first direction and perpendicular to each other are defined as a second direction and a third direction, the coil holding portion and the substrate supporting portion are arranged in the second direction, the substrate surface faces an opposite side to the coil holding portion in the second direction, the substrate includes a wiring connection portion including the land, and a pair of legs protruding from both end portions of the wiring connection portion in the third direction to one side in the first direction, the board support portion includes a pair of slits into which both end edges of the board in the third direction are inserted from the other side in the first direction, and an insertion portion inserted from one side in the first direction into a cutout opening of the board defined by the pair of legs and the wiring connection portion, the insertion portion has a tip surface that comes into contact with the wiring connection portion, 5. The actuator according to claim 1, wherein the recess is provided on the tip surface.

6. the coil holder is made of resin, the pair of legs each include a pair of projections that contact the insertion portion from both sides in the third direction, The actuator according to claim 5, characterized in that before the insertion portion is inserted into the recessed opening, the pair of protrusions face each other in the third direction, and the distance between the two protrusions in the third direction is narrower than the width of the insertion portion in the third direction.

7. the insertion portion includes a pair of inclined surfaces inclined in a direction away from the tip surface and away from the wiring connection portion on both sides of the tip surface in the third direction, and a pair of side surfaces extending in the first direction from ends of the inclined surfaces opposite the tip surface to the wiring connection portion, The actuator according to claim 6, characterized in that before the insertion portion is inserted into the notch opening, the distance between the two protrusions opposing each other in the third direction is wider than the width of the tip surface in the third direction and narrower than the distance between the pair of side surfaces in the third direction.

8. 8. The method for manufacturing an actuator according to claim 7, the coil holding portion of the coil holder is made to hold the winding portion, and the pull-out portion is pulled out to an opposite side of the coil holding portion of the recess in the second direction; The substrate is disposed on the other side of the pair of slits in the first direction, and the substrate surface is oriented so as to face a side opposite to the coil holding portion in the second direction; inserting both end edges of the substrate in the third direction into the pair of slits from the other side in the first direction, and inserting the insertion portion into the cutout opening of the substrate to support the substrate in a temporary support position where each of the pair of protrusions contacts each inclined surface of the insertion portion and a gap is formed between the wiring connection portion and the tip surface; a tip end portion of the lead portion is connected to the land of the substrate at the temporary support position; A method for manufacturing an actuator, comprising: pushing the substrate in the temporary support position into a support position where each of the pair of protrusions contacts each side of the insertion portion and the tip surface abuts the wiring connection portion.

Images