JP2021164226A - Damper member and actuator - Google Patents

Abstract

To provide a damper member in which a first member and a second member, which have a frame shape are connected with a cylindrical gel-like member, capable of preventing a damper member from being damaged when a stress is converted to an inner peripheral part of the gel-like member.SOLUTION: A damper member 10 comprises: a first member 11; a second member 12 surrounding an outer peripheral side of the first member 11; and a gel-like member 14 arranged between the first member 11 and the second member 12. The gel-like member 14 comprises: a first gel-like member 141 connecting the first member 11 and the second member 12; and a second gel-like member 142 connected to a chamfered part 18 formed in an edge of an outer peripheral face 150 of the first member 11 and the first gel-like member 141. An adhesion force to the first member 11 of the second gel-like member 142 is larger than the adhesion force to the first member 11 of the first gel-like member 141. Therefore, the damper member 10 is hardly damaged when applying a stress to an inner peripheral part of the gel-like member 14.SELECTED DRAWING: Figure 4

Description

The present invention relates to an actuator that vibrates a movable body with respect to a fixed body, and a damper member that connects the movable body and the fixed body.

Some actuators are provided with a fixed body and a movable body, a magnetic drive mechanism for vibrating the movable body with respect to the fixed body, and the movable body and the fixed body are connected by a gel-like damper member. In Patent Document 1, the movable body includes a yoke to which a magnet is fixed, and the fixed body (fixed body) includes a cover for accommodating the movable body and a holder for holding a coil. In the gel-like damper member, one surface in the thickness direction is adhered to the yoke, and the other surface is adhered to the cover member.

Japanese Unexamined Patent Publication No. 2019-13086

In Patent Document 1, the gel-like damper member is a gel-like member obtained by cutting a sheet-like gel into a rectangular shape, and is sandwiched between a yoke and a cover. However, when the cut gel-like member is handled as a single part, it is difficult to handle. Further, in the structure of Patent Document 1, the gel-like damper member is assembled so as to be deformable in a direction orthogonal to the vibration direction. Therefore, there is a problem that the movable body tends to move in an unintended direction.

Therefore, the present inventors arrange a tubular gel-like member in the gap between the frame-shaped first member and the second member (inner frame and outer frame), and use the tubular gel-like member to form the first member. We are proposing a damper member having a structure connected to a second member. In the actuator having a structure in which the first member (inner frame) is fixed to the shaft which is a component on the movable body side and the second member (outer frame) is fixed to the case which is a component on the fixed body side, the movable body is in the vibration direction (axial direction). ) Is difficult to move in the direction orthogonal to).

In the damper member having the above structure, when the movable body vibrates in the axial direction, stress is concentrated on the inner peripheral portion of the tubular gel-like member. The inner peripheral portion of the gel-like member is connected to the outer peripheral surface of the first member (inner frame). Since the first member is provided with a chamfered portion on the edge of the outer peripheral surface for removing burrs during manufacturing, the edge of the gel-like member is connected to the chamfered portion. If the edge of the gel-like member has a shape that penetrates into the tapered chamfered portion, the gel-like member tends to peel off from the first member when stress is concentrated on this portion. Therefore, there is a problem that the damper member is fragile and has low durability.

In view of the above problems, the subject of the present invention is a damper member in which the frame-shaped first member and the second member are connected by a tubular gel-like member, and a movable body via the tubular gel-like member. Another object of the present invention is to propose a structure in which the gel-like member is hard to be peeled off from the frame material on the inner peripheral side when stress is concentrated on the inner peripheral portion of the gel-like member in the actuator for connecting the solid.

In order to solve the above problems, the damper member according to the present invention is arranged between the first member, the second member surrounding the outer peripheral side of the first member, and the first member and the second member. It has a gel-like member, and the gel-like member includes a first gel-like member that connects the first member and the second member, and a chamfered portion formed on the edge of the outer peripheral surface of the first member. A second gel-like member connected to the first gel-like member is provided, and the adhesion force of the second gel-like member to the first member is the adhesion force of the first gel-like member to the first member. It is characterized by being larger than.

According to the present invention, a gel-like member is formed between a frame material on the inner peripheral side (first member) and a frame material on the outer peripheral side (second member) to form a component. Therefore, since the gel-like member can be connected to the movable body and the fixed body via the first member and the second member, it is not necessary to perform the bonding work of the gel-like member when connecting the movable body and the fixed body. Therefore, the actuator can be easily assembled. Further, as the gel-like member, the first gel-like member having the characteristics required as a damper member is used in the portion connecting the first member and the second member, while the first member has an inner peripheral portion where stress is concentrated. The portion connected to the chamfered portion uses a second gel-like member for reinforcement to improve the adhesion to the first member. Therefore, when stress is concentrated on the inner peripheral portion of the gel-like member, the damper member is less likely to come off from the chamfered portion, and the damper member 10 is less likely to break. Therefore, the durability can be improved while ensuring the characteristics required as a damper member.

In the present invention, it is preferable that the gel-like member continuously surrounds the entire circumference of the first member. In this way, when the first member moves relative to the second member in the radial direction, the gel-like member is deformed in the crushing direction, so that the first member is relative to the second member in the axial direction. The spring constant is larger than when moving. Therefore, when an actuator that vibrates the movable body in the axial direction is configured, it is possible to prevent the movable body from moving in a direction different from the vibration direction.

In the present invention, the gel-like member preferably has a cylindrical shape. In this way, the gel-like members are evenly arranged all around. Therefore, since the spring constant of the gel-like member can be made uniform over the entire circumference, the movable body does not easily move in a specific direction when an actuator that vibrates the movable body in the axial direction is configured. Therefore, the movable body can be stably supported.

In the present invention, the second gel-like member may have a structure extending from the chamfered portion to the second member. When the gel-like member is manufactured by casting, the gel-like member spreads in such a shape. That is, when the first member and the second member are positioned on the mold member and the gel material forming the second gel-like member is discharged into the gap between the first member and the second member, the gel material is discharged along the bottom surface of the mold member. It spreads and spreads from the chamfered part of the first member to the second member. Thereby, the chamfered portion can be protected by the second gel-like member. After that, the first member and the second member can be connected by discharging the gel material forming the first gel-like member.

Next, the actuator of the present invention has a movable body and a fixed body, a drive mechanism for vibrating the movable body with respect to the fixed body, and the damper member, and the movable body and the fixed body have the movable body and the fixed body. One is provided with an inner peripheral side portion arranged on the inner peripheral side of the other of the movable body and the fixed body, and the other of the movable body and the fixed body is an outer peripheral side portion surrounding the outer peripheral side of the inner peripheral side portion. The damper member is characterized in that the first member is fixed to the inner peripheral side portion and the second member is fixed to the outer peripheral side portion.

According to the present invention, the gel-like member can be connected to the movable body and the fixed body via the first member and the second member. Therefore, the work of connecting the movable body and the fixed body via the damper member is easy, and the actuator can be easily assembled. Further, when the movable body vibrates, the gel-like member is hard to be peeled off from the first member and the damper member is hard to break, so that the durability of the actuator can be improved. Further, by increasing the durability of the damper member, the allowable range of amplitude when vibrating the movable body can be increased. Therefore, the movable body can be vibrated with a large amplitude.

In the present invention, it is preferable that the damper member connects the movable body and the fixed body on one end side and the other end side of the movable body in the vibration direction. In this way, both ends of the movable body in the vibration direction are supported by the damper members. Therefore, the movable body can be stably supported, and the movable body can be suppressed from moving in an unintended direction.

Next, the present invention can be applied to an actuator in which a gel-like member is formed directly between a movable body and a fixed body. That is, the actuator of the present invention has a movable body and a fixed body, a drive mechanism for vibrating the movable body with respect to the fixed body, and a gel-like member connecting the fixed body and the movable body. One of the movable body and the fixed body includes an inner peripheral side portion arranged on the inner peripheral side of the other of the movable body and the fixed body, and the other of the movable body and the fixed body is on the inner peripheral side of the movable body and the fixed body. The gel-like member includes an outer peripheral side portion surrounding the outer peripheral side of the portion, and the gel-like member is formed on the edge of the first gel-like member connecting the inner peripheral side portion and the outer peripheral side portion and the inner peripheral side portion. A chamfered portion and a second gel-like member connected to the first gel-like member are provided, and the adhesion force of the second gel-like member to the inner peripheral side portion is the inner circumference of the first gel-like member. It is characterized by having a greater adhesion than the side portion.

According to the present invention, since the movable body and the fixed body are connected by the damper member, the gel-like member is unlikely to be peeled off from the inner peripheral side portion when the movable body vibrates. Therefore, the durability of the actuator can be improved. Further, since the durability of the actuator is high, the allowable range of amplitude when vibrating the movable body can be increased. Therefore, the movable body can be vibrated with a large amplitude. As a result, the allowable range of amplitude when vibrating the movable body can be increased, so that the movable body can be vibrated with a large amplitude.

In the present invention, it is preferable that the gel-like member continuously surrounds the entire circumference of the inner peripheral side portion. In this way, the gel-like member is arranged on the entire circumference of the movable body. Therefore, when the movable body moves in a direction other than the vibration direction, the gel-like member is deformed in the crushing direction, so that the spring constant of the gel-like member becomes larger than when the movable body moves in the vibration direction. Therefore, it is possible to prevent the movable body from moving in a direction different from the vibration direction.

In the present invention, the gel-like member preferably has a cylindrical shape. In this way, the gel-like members are evenly arranged all around. Therefore, since the spring constant of the gel-like member can be made uniform over the entire circumference, the movable body does not easily move in a specific direction. Therefore, the movable body can be stably supported.

In the present invention, the second gel-like member may have a structure extending from the chamfered portion to the outer peripheral side portion. As described above, when the gel-like member is manufactured by casting, the gel-like member expands into such a shape. That is, when the member having the inner peripheral side portion and the member having the outer peripheral side portion are positioned on the mold member and the gel material forming the second gel-like member is discharged into the gap between the two members, the gel material becomes the mold member. It spreads along the bottom surface and extends from the chamfered part on the inner peripheral side to the outer peripheral side. Thereby, the chamfered portion can be protected by the second gel-like member. After that, by discharging the gel material forming the first gel-like member, the inner peripheral side portion and the outer peripheral side portion can be connected.

In the present invention, it is preferable that the gel-like member connects the movable body and the fixed body on one end side and the other end side of the movable body in the vibration direction. In this way, both ends of the movable body in the vibration direction are supported by the gel-like members. Therefore, the movable body can be stably supported, and the movable body can be suppressed from moving in an unintended direction.

According to the present invention, the inner peripheral side frame material (first member or inner peripheral side portion) and the outer peripheral side frame material (second member or outer peripheral side portion) are connected by a gel-like member. For the gel-like member, the first gel-like member having the characteristics required as a damper member is used for the portion connecting the frame material on the inner peripheral side and the frame material on the outer peripheral side, while the inner peripheral portion where stress is concentrated is used. A second gel-like member for reinforcement is used in the portion connected to the chamfered portion of the frame material on the peripheral side and easily peeled off to improve the adhesion to the frame material on the inner peripheral side. Therefore, when stress is concentrated on the inner peripheral portion of the gel-like member, it is difficult for the gel-like member to be peeled off from the frame material on the inner peripheral side, so that the durability can be improved while ensuring the characteristics required as the damper member. ..

It is sectional drawing of the actuator which concerns on embodiment of this invention. It is an exploded perspective view which looked at the actuator of FIG. 1 from one side in the axial direction. It is an exploded perspective view which looked at the actuator of FIG. 1 from the other side in the axial direction. It is sectional drawing which shows typically the structure of a damper member. It is explanatory drawing of the manufacturing method of a damper member. It is sectional drawing which shows typically the structure of the damper member of the modification.

Hereinafter, embodiments of the present invention will be described with reference to the drawings. In the following description, the axis L is the central axis of the movable body 3. Further, one side in the direction in which the axis L extends (axis L direction) is L1, and the other side in the axis L direction is L2. In the actuator 1 to which the present invention is applied, the movable body 3 vibrates in the axis L direction with respect to the fixed body 2.

In the embodiment described below, the movable body 3 is connected to the fixed body 2 by the damper member 10 at two positions, one side L1 and the other side L2 in the axis L direction, but in the present invention, the damper member 10 May be adopted in the manner in which is arranged in one place or three or more places. Further, in the embodiment described below, the movable body 3 is arranged on the inner peripheral side of the fixed body 2, but in the present invention, the movable body 3 is arranged on the outer peripheral side of the fixed body 2. You may.

Further, in the embodiment described below, the magnetic drive mechanism 6 is used as the drive mechanism for vibrating the movable body 3 with respect to the fixed body 2. The magnetic drive mechanism 6 includes a magnet 61 arranged on the movable body 3 and a coil 62 arranged on the fixed body 2, but in the present invention, the arrangement of the magnet 61 and the coil 62 is reversed. It is also possible to adopt it. That is, the magnetic drive mechanism 6 may employ an embodiment including a coil 62 arranged on the movable body 3 and a magnet 61 arranged on the fixed body 2.

(overall structure)
FIG. 1 is a cross-sectional view of the actuator 1 according to the embodiment of the present invention. FIG. 2 is an exploded perspective view of the actuator 1 shown in FIG. 1 as viewed from one side L1 in the axial direction. FIG. 3 is an exploded perspective view of the actuator 1 shown in FIG. 1 as viewed from the other side L2 in the axial direction. The actuator 1 includes a fixed body 2 and a movable body 3, a damper member 10 that connects the fixed body 2 and the movable body 3, and a magnetic drive mechanism 6 that moves the movable body 3 relative to the fixed body 2. The magnetic drive mechanism 6 includes a magnet 61 arranged on the movable body 3 and a coil 62 arranged on the fixed body 2, and moves the movable body 3 relative to the fixed body 2 in the axis L direction.

(Damper member)
The movable body 3 is connected to the fixed body 2 via the damper member 10 at each position of the end portion of one side L1 in the axis L direction and the end portion of the other side L2 in the axis L direction. Hereinafter, the damper member 10 arranged on one side L1 in the axis L direction is referred to as a first damper member 10A, and the damper member 10 arranged on the other side L2 in the axis L direction is referred to as a second damper member 10B. The first damper member 10A and the second damper member 10B are the same member, and are arranged in opposite directions in the axis L direction.

The damper member 10 includes a first member 11, a second member 12 that surrounds the outer peripheral side of the first member 11, and a gel-like member 14 that is arranged between the first member 11 and the second member 12. In this embodiment, the first member 11 and the second member 12 are cylindrical and are arranged coaxially. The gel-like member 14 has a cylindrical shape having a constant radial thickness. The inner peripheral portion of the gel-like member 14 is connected to the first member 11, and the outer peripheral portion of the gel-like member 14 is connected to the second member 12.

The damper member 10 includes at least one of elastic and viscoelastic. In this embodiment, the gel-like member 14 is a viscoelastic body. As will be described later, the gel-like member 14 of the present embodiment is composed of two different types of gel-like members. Most of the gel-like member 14 (the first gel-like member 141 described later) is made of a silicone gel having a needle insertion degree of 90 degrees to 110 degrees.

The first member 11 is fixed to the movable body 3. The first member 11 is integrated with the movable body 3 and vibrates in the L direction of the axis. Therefore, the first member 11 can be used as a weight for adjusting the mass of the movable body 3. The second member 12 is fixed to the fixed body 2. The gel-like member 14 connects the fixed body 2 and the movable body 3 via the first member 11 and the second member 12. When the movable body 3 vibrates in the L direction of the axis, the gel-like member 14 is deformed in the shear direction.

(Fixed body)
The fixed body 2 includes a cylindrical case 20, a first lid member 21 that closes the opening of the case 20 on one side L1 in the axis L direction, and a second lid that closes the opening of the case 20 on the other side L2 in the axis L direction. A member 22 and a coil holder 4 arranged between the first lid member 21 and the second lid member 22 inside the case 20 are provided. In this embodiment, the case 20, the first lid member 21, the second lid member 22, and the coil holder 4 are made of resin.

As shown in FIGS. 2 and 3, each of the first lid member 21 and the second lid member 22 is provided with claw portions 27 at three locations. The claw portion 27 is elastically deformable inward in the radial direction and is pushed into the inner peripheral side of the case 20. By locking the tip of the claw portion 27 to the locking portion 28 provided on the edge of the case 20, the first lid member 21 and the second lid member 22 are restricted from coming off from the case 20.

The coil holder 4 includes a holder annular portion 41 and a body portion 42 projecting from the holder annular portion 41 to the other side L2 in the axis L direction. The coil holder 4 is fixed to the case 20 by press-fitting the holder annular portion 41 into the case 20. The first lid member 21 is fixed to the holder annular portion 41 from the L1 side. The holder annular portion 41 includes a circular opening 44, and the first damper member 10A is fixed to the opening 44. In this embodiment, the second member 12 of the first damper member 10A is press-fitted into the opening 44.

The coil 62 is fixed to the body portion 42 of the coil holder 4. The end of the coil wire (not shown) drawn out from the coil 62 is entwined with a terminal pin protruding radially outward from the holder annular portion 41. The coil wire is connected to the substrate 63 via a terminal pin. As shown in FIG. 2, the substrate 63 is fixed to the recess 24 provided on the outer peripheral surface of the case 20.

As shown in FIG. 1, the case 20 includes a case annular portion 25 that protrudes from the position on the L1 side of the second lid member 22 toward the inner peripheral side. The second lid member 22 is fixed to the case annular portion 25 from the L2 side. Further, the case annular portion 25 is provided with a circular opening 26, and the second damper member 10B is fixed to the opening 26. In this embodiment, the second member 12 of the second damper member 10B is press-fitted into the opening 26.

(Movable body)
The movable body 3 has a shaft 31 extending in the axis L direction at the center of the fixed body 2 in the radial direction, a magnet 61 fixed substantially in the center of the shaft 31 in the axis L direction, and a first yoke that overlaps the magnet 61 on the L1 side. A second yoke 33 that overlaps the magnet 61 on the L2 side is provided with the 32.

The magnet 61 has a cylindrical shape and is magnetized so as to be polarized into the north and south poles in the L direction of the axis. The shaft 31 extends in the axis L direction at the center of the fixed body 2 in the radial direction. On the outer peripheral side of the magnet 61, the body portion 42 of the coil holder 4 is arranged coaxially with the magnet 61. Therefore, the magnet 61 and the coil 62 are arranged coaxially.

The first yoke 32 is a magnetic plate whose outer diameter dimension is slightly larger than the outer diameter dimension of the magnet 61. The outer peripheral surface of the first yoke 32 projects radially outward from the outer peripheral surface of the magnet 61. The first yoke 32 is fixed to the surface of the magnet 61 on the L1 side by a method such as adhesion.

The second yoke 33 is composed of two magnetic plates (first magnetic plate 34, second magnetic plate 35). The first magnetic plate 34 has an end plate portion 341 fixed to the surface of the magnet 61 on the L2 side by an adhesive or the like, and a cylindrical side plate portion 342 extending from the outer edge of the end plate portion 341 to the L1 side. Be prepared. The side plate portion 342 is arranged on the outer peripheral side of the body portion 42 of the coil holder 4. The second magnetic plate 35 has a disk shape slightly smaller than the end plate portion 341 of the first magnetic plate 34. The second magnetic plate 35 is laminated on the end plate portion 341 of the first magnetic plate 34 on the L1 side and welded to the end plate portion 341. The second magnetic plate 35 is fixed to the surface of the magnet 61 on the L2 side by a method such as adhesion.

The shaft 31 includes a first end portion 311 projecting from the first yoke 32 toward the L1 side and a second end portion 312 projecting from the second yoke 33 toward the L2 side. The first member 11 of the first damper member 10A is fixed to the first end portion 311. Further, the first member 11 of the second damper member 10B is fixed to the second end portion 312. The two first members 11 fixed to both ends of the shaft 31 move integrally with the movable body 3.

(Actuator operation)
When the actuator 1 energizes the coil 62, the magnetic drive mechanism 6 generates a driving force for driving the movable body 3 in the axis L direction. When the energization of the coil 62 is turned off, the movable body 3 returns to the origin position by the returning force of the gel-like member 14. Therefore, by intermittently energizing the coil 62, the movable body 3 vibrates in the axis L direction.

The first damper member 10A includes a gel-like member 14 that surrounds the end of the shaft 31 on the L1 side between the shaft 31 and the coil holder 4. Further, the second damper member 10B includes a gel-like member 14 that surrounds the end of the shaft 31 on the L2 side between the shaft 31 and the case annular portion 25. In the first damper member 10A and the second damper member 10B, the gel-like member 14 is filled between the first member 11 and the second member 12 without a gap, and is continuously arranged on the entire circumference.

When the movable body 3 vibrates in the L direction along the axis with respect to the fixed body 2, the damper member 10 is fixed to the first member 11 fixed to the inner peripheral portion of the gel-like member 14 and the outer peripheral portion of the gel-like member 14. The second member 12 and the second member 12 move relative to each other in the L direction of the axis. Therefore, the gel-like member 14 is deformed in the shearing direction following the vibration of the movable body 3.

When the movable body 3 moves in the radial direction, the damper member 10 is deformed in the direction in which the gel-like member 14 is crushed. The spring constant when the gel-like member 14 is deformed in the crushing direction is about three times the spring constant when the gel-like member 14 is deformed in the shearing direction. Therefore, it is suppressed that the movable body 3 moves in a direction different from the vibration direction (axis L direction).

(Gel-like member)
FIG. 4 is a cross-sectional view schematically showing the configuration of the damper member 10. In FIG. 4, LA is the central axis of the damper member 10. LA1 is one side in the direction in which the axis LA extends (axis LA direction), and LA2 is the other side in the axis LA direction. As shown in FIG. 1, the damper member 10 is assembled so that the axis L of the actuator 1 and the axis LA of the damper member 10 coincide with each other.

The first member 11 has a cylindrical shape, and includes a large diameter portion 15 and a small diameter portion 16 having a diameter smaller than that of the large diameter portion 15. A shaft hole 17 is formed in the center of the first member 11. The large diameter portion 15 is arranged on the inner peripheral side of the second member 12. The small diameter portion 16 extends from the large diameter portion 15 to LA1 on one side. The inner circumference of the gel-like member 14 is connected to the outer peripheral surface 150 of the large-diameter portion 15, and the outer peripheral portion of the gel-like member 14 is connected to the inner peripheral surface 120 of the second member 12.

Both the first member 11 and the second member 12 are made of metal. A chamfered portion 18 for removing burrs formed during the manufacture of the first member 11 is formed on the edge of the LA2 on the other side of the outer peripheral surface 150 of the large diameter portion 15. As shown in FIG. 4, the chamfered portion 18 has a tapered shape in which the edge of the outer peripheral surface 150 is notched diagonally, and is formed on the entire circumference. Although not shown in FIG. 4, chamfered portions are also formed in other portions of the first member 11 and the second member 12. For example, the edge of the outer peripheral surface of the small diameter portion 16, the edge of the inner peripheral surface of the first member 11, the edge of the outer peripheral surface of the second member 12, and the edge of the inner peripheral surface 120 of the second member 12, respectively. A similar chamfer is formed.

The gel-like member 14 is a cast product, and is manufactured by injecting a gel material into the gap between the first member 11 and the second member 12 and solidifying the gel material. Since the end surface of the gel-like member 14 on the other side LA2 is a surface in contact with the mold for manufacturing, it is a flat surface and is the same as the end surface of the other side LA2 of the first member 11 and the end surface of the other side LA2 of the second member 12. Located on the surface.

The gel-like member 14 is composed of two types of gel-like members, a first gel-like member 141 and a second gel-like member 142. Note that FIG. 1-3 omits the illustration of the first gel-like member 141 and the second gel-like member 142, and shows only the overall shape of the gel-like member 14. The second gel-like member 142 extends over the entire end surface of LA2 on the other side of the gel-like member 14, and is connected to the chamfered portion 18 of the first member 11. In this embodiment, the second gel-like member 142 extends from the chamfered portion 18 to the inner peripheral surface 120 of the second member 12. The first gel-like member 141 is laminated on one side LA1 of the second gel-like member 142, and connects the first member 11 and the second member 12.

The second gel-like member 142 is a reinforcing gel for increasing the adhesion of the gel-like member 14 to the chamfered portion 18. Therefore, the adhesion force of the second gel-like member 142 to the first member 11 is larger than the adhesion force of the first gel-like member 141 to the first member 11. Here, the adhesion force (adhesion strength) is a characteristic that can be measured by a vertical tensile test. In the vertical tensile test, for example, a gel-like member as a sample is connected to a fixed surface (in the case of this embodiment, the outer peripheral surface of the first member 11), and the gel-like member is pulled in a direction perpendicular to the fixed surface. This is done by measuring the tensile force when the gel-like member is peeled off.

In this embodiment, the second gel-like member 142 is thin enough to have almost no effect on the spring constant of the gel-like member 14. Therefore, the spring constant of the gel-like member 14 is defined by the first gel-like member 141. In this embodiment, as described above, the first gel-like member 141 is made of a silicone gel having a needle insertion degree of 90 degrees to 110 degrees. The second gel-like member 142 may or may not be a silicone gel having a needle insertion degree of 90 to 110 degrees. The thickness of the second gel-like member 142 can be made thicker than that of the present embodiment. In this case, the spring constant of the gel-like member 14 is a value obtained by combining the spring constant of the first gel-like member 141 and the spring constant of the second gel-like member 142.

(Manufacturing method of damper member)
FIG. 5 is an explanatory diagram of a method for manufacturing the damper member 10. The manufacturing jig 90 used for manufacturing the damper member 10 includes a circular recess 91 and a pin 92 protruding from the center of the bottom surface of the circular recess 91. The method for manufacturing the damper member 10 is a first step of assembling the first member 11 and the second member 12 to the manufacturing jig 90, and filling the gap S between the first member 11 and the second member 12 with a gel material. It includes a second step, a third step of heat-curing the gel material, and a fourth step of removing the damper member 10 from the manufacturing jig 90.

In the first step, the first member 11 and the second member 12 are brought into contact with the manufacturing jig 90 for positioning, thereby creating a radial gap S between the first member 11 and the second member 12. Form. As shown in FIG. 5, in the first step, a pin 92 protruding from the center of the circular recess 91 is inserted into the shaft hole 17 of the first member 11, and the end surface of the large diameter portion 15 of the first member 11 is inserted into the circular recess 91. The bottom surface 94 of the above is brought into contact with the bottom surface 94 from the L1 side. Further, the second member 12 is inscribed on the inner peripheral surface of the circular recess 91, and the end surface of the second member 12 is brought into contact with the outer peripheral region of the bottom surface 94 of the circular recess 91. As a result, the first member 11 and the second member 12 are positioned in the axis L direction and the radial direction, and an annular gap S is formed between the large diameter portion 15 of the first member 11 and the second member 12. .. The annular gap S is formed over the entire circumference, and the width in the radial direction is constant over the entire circumference.

In this embodiment, the primer 13 is applied to the surface in contact with the gel-like member 14 before the gel material is put into the gap S in the second step. Specifically, the primer 13 is applied to the outer peripheral surface 150 of the large diameter portion 15 and the inner peripheral surface 120 of the second member 12. The primer 13 is also applied to the chamfered portion 18. The work of applying the primer 13 may be performed before assembling the first member 11 and the second member 12 to the manufacturing jig 90, or may be performed after assembling.

In the second step, the gap S between the first member 11 and the second member 12 is filled with the gel material before curing. Since the gel-like member 14 of the present embodiment includes two layers of the first gel-like member 141 and the second gel-like member 142, the two types of gel materials are sequentially filled in the second step. As shown in FIG. 5, in the second step, first, a small amount of the second gel material G2 is discharged from the dispenser 93 into the gap S. The second gel material G2 spreads over the entire bottom of the gap S and enters the gap between the bottom surface 94 of the circular recess 91 and the chamfered portion 18. Next, the first gel material G1 is discharged from the dispenser 93 to fill the gap S.

In the third step, the gel materials (first gel-like member 141 and second gel-like member 142) are heated together with the manufacturing jig 90 and cured by maintaining the gel material at a specified temperature for a specified time. As a result, the gel-like member 14 is formed in the gap S. When the gel materials (first gel material G1 and second gel material G2) are heat-cured, the portion in contact with the primer 13 reacts with the primer 13, and the outer peripheral surface 150 of the large diameter portion 15 and the second member 12 It is fixed to the inner peripheral surface 120. Therefore, the cured gel-like member 14 is fixed to the first member 11 and the second member 12 by the adhesive force of the gel-like member 14 itself without using an adhesive.

In the fourth step, the completed damper member 10 is removed from the manufacturing jig 90. For example, a through hole (not shown) for arranging the protrusion pin is provided on the surface of the manufacturing jig 90 that the first member 11 contacts and the surface that the second member 12 contacts, and the protrusion pin is used. The damper member 10 is removed from the manufacturing jig 90.

(Main effect of this form)
As described above, the damper member 10 of the present embodiment is in the form of a gel arranged between the first member 11 and the second member 12 surrounding the outer peripheral side of the first member 11 and between the first member 11 and the second member 12. It has a member 14. The gel-like member 14 includes a first gel-like member 141 that connects the first member 11 and the second member 12, a chamfered portion 18 formed on the edge of the outer peripheral surface 150 of the first member 11, and the first gel-like member 141. A second gel-like member 142 connected to is provided. The adhesion force of the second gel-like member 142 to the first member 11 is larger than the adhesion force of the first gel-like member 141 to the first member 11.

Further, the actuator 1 of the present embodiment includes a movable body 3 and a fixed body 2, a magnetic drive mechanism 6 that vibrates the movable body 3 with respect to the fixed body 2, and the damper member 10 described above. In this embodiment, the movable body 3 is arranged on the inner peripheral side of the fixed body 2. The movable body 3 includes a shaft 31 (inner peripheral side portion) arranged at the center of the actuator 1 in the radial direction, and the fixed body 2 has an outer peripheral side portion (holder annular portion 41 and a case annular portion) surrounding the outer peripheral side of the shaft 31. Part 25) is provided. In the damper member 10, the first member 11 is fixed to the inner peripheral side portion, and the second member 12 is fixed to the outer peripheral side portion.

The damper member 10 of this embodiment is made into a component by molding a gel-like member 14 between a frame material on the inner peripheral side (first member 11) and a frame material on the outer peripheral side (second member 12). Therefore, since the gel-like member 14 can be connected to the movable body 3 and the fixed body 2 via the first member 11 and the second member 12, the gel-like member 14 can be connected to the movable body 3 and the fixed body 2. There is no need to perform bonding work. Therefore, the actuator 1 can be easily assembled.

Further, in the gel-like member 14, the portion connecting the first member 11 and the second member 12 is composed of the first gel-like member 141 having the characteristics required as a damper, while the inner peripheral portion where stress is concentrated is the first. The portion of the 1 member 11 connected to the chamfered portion 18 uses a second gel-like member 142 for reinforcement to improve the adhesion to the first member 11. Therefore, when stress is concentrated on the inner peripheral portion of the gel-like member 14, the gel-like member 14 is hard to peel off from the chamfered portion 18, and the damper member 10 is hard to break. Therefore, the durability can be improved while ensuring the characteristics required for the damper member 10.

When such a damper member 10 is used, the gel-like member 14 is hard to be peeled off from the first member 11 when the movable body 3 vibrates, and the damper member 10 is hard to break. Therefore, the durability of the actuator 1 can be improved. Further, by making the damper member 10 hard to break, it is possible to increase the allowable range of amplitude when the movable body 3 is vibrated. Therefore, the movable body 3 can be vibrated with a large amplitude.

In this embodiment, the gel-like member 14 continuously surrounds the entire circumference of the first member 11. As a result, when the first member 11 is connected to the movable body 3 and the second member 12 is connected to the fixed body 2, the gel-like member 14 is arranged on the entire circumference of the movable body 3. Therefore, when the movable body 3 moves in a direction other than the vibration direction, the gel-like member 14 is deformed in the crushing direction, but the spring constant when the gel-like member 14 is deformed in the crushing direction is deformed in the shearing direction. It is larger than the spring constant when it is used. Therefore, it is possible to prevent the movable body 3 from moving in a direction different from the vibration direction.

In this embodiment, the gel-like member 14 has a cylindrical shape and is evenly arranged on the entire circumference. Therefore, since the spring constant of the gel-like member 14 can be made uniform over the entire circumference, the movable body 3 does not easily move in a specific direction. Therefore, the movable body 3 can be stably supported.

In this embodiment, the second gel-like member 142 extends from the chamfered portion 18 to the second member 12. In this embodiment, since the gel-like member 14 is manufactured by casting as described above, the gel-like member 14 expands into such a shape. In this embodiment, since the thermosetting gel is used as the gel-like member 14, the time required for curing is long. Therefore, if the gel-like member 14 is formed directly between the first member 11 and the second member 12 by casting, the damper member 10 can be easily manufactured.

In the actuator 1 of the present embodiment, the damper member 10 connects the movable body 3 and the fixed body 2 at one end side and the other end side of the movable body 3 in the vibration direction. Therefore, since both ends of the movable body 3 in the vibration direction are supported by the damper members 10, the movable body 3 can be stably supported and the movable body 3 can be suppressed from moving in an unintended direction.

(Modification example)
(1) The damper member 10 of the above-described embodiment is formed by molding a gel-like member 14 between the frame-shaped first member 11 and the second member 12, but the present invention describes the movable body 3. It can be applied to the form in which the gel-like member 14 is directly formed between the fixed body 2 and the fixed body 2. For example, in an actuator in which the first member 11 is fixed or integrated with the shaft 31 and the second member 12 is fixed or integrated with the holder annular portion 41 and the case annular portion 25, respectively, the first member 11 is attached to the movable body 3. The inner peripheral side portion provided is formed, and the second member 12 constitutes the outer peripheral side portion provided on the fixed body 2. The gel-like member 14 that connects the movable body 3 and the fixed body 2 is composed of a first gel-like member 141 and a second gel-like member 142 as in the above embodiment. That is, the first gel-like member 141 connects the inner peripheral side portion and the outer peripheral side portion, and the second gel-like member 142 is a chamfered portion and a first gel-like member 141 formed on the edge of the inner peripheral side portion. Connected to. The adhesion force of the second gel-like member 142 to the inner peripheral side portion is larger than the adhesion force of the first gel-like member 141 to the inner peripheral side portion.

In this way, as in the above embodiment, the portion connected to the chamfered portion of the inner peripheral side portion can be improved in adhesion to the inner peripheral side portion by using the second gel-like member 142 for reinforcement. Therefore, when stress is concentrated on the inner peripheral portion of the gel-like member 14, the gel-like member 14 is unlikely to be peeled off from the inner peripheral side portion, so that the durability of the actuator can be improved. As a result, the allowable range of amplitude when vibrating the movable body 3 can be increased, so that the movable body 3 can be vibrated with a large amplitude.

(2) FIG. 6 is a cross-sectional view of the damper member 110 of the modified example. In the damper member 110 of FIG. 6, the second gel-like member 142 is arranged only in the vicinity of the chamfered portion 18, and does not extend to the second member 12. In the above embodiment, since the second gel-like member 142 is formed by casting, the second gel-like member 142 extends from the chamfered portion 18 to the second member 12, but by manufacturing by another manufacturing method, FIG. The damper member 110 having the form shown in the above can be manufactured. For example, after applying the second gel material G2 to the chamfered portion 18, the first member 11 and the second member 12 are positioned on the manufacturing jig 90, and the first gel is formed in the gap S between the first member 11 and the second member 12. The gel-like member may be formed by filling the material G1.

1 ... actuator, 2 ... fixed body, 3 ... movable body, 4 ... coil holder, 6 ... magnetic drive mechanism, 10 ... damper member, 10A ... first damper member, 10B ... second damper member, 11 ... first member, 12 ... 2nd member, 13 ... Primer, 14 ... Gel-like member, 15 ... Large diameter part, 16 ... Small diameter part, 17 ... Shaft hole, 18 ... Chamfered part, 20 ... Case, 21 ... First lid member, 22 ... 2nd lid member, 24 ... concave, 25 ... case annular part, 26 ... opening, 27 ... claw part, 28 ... locking part, 31 ... shaft, 32 ... second yoke, 33 ... second yoke, 34 ... second 1 magnetic plate, 35 ... second magnetic plate, 41 ... holder annular part, 42 ... body, 44 ... opening, 61 ... magnet, 62 ... coil, 63 ... substrate, 90 ... manufacturing jig, 91 ... circular recess , 92 ... pin, 93 ... dispenser, 94 ... bottom surface, 110 ... damper member, 120 ... inner peripheral surface, 141 ... first gel-like member, 142 ... second gel-like member, 150 ... outer peripheral surface, 311 ... first end , 312 ... 2nd end, 341 ... end plate, 342 ... side plate, G1 ... 1st gel material, G2 ... 2nd gel material, L ... axis, L1 ... one side, L2 ... other side, LA ... Axis line, LA1 ... one side, LA2 ... other side, S ... gap

Claims (11)

A first member and a second member surrounding the outer peripheral side of the first member,
It has a gel-like member arranged between the first member and the second member, and has.
The gel-like member is
A first gel-like member connecting the first member and the second member,
A chamfered portion formed on the edge of the outer peripheral surface of the first member and a second gel-like member connected to the first gel-like member are provided.
A damper member characterized in that the adhesion force of the second gel-like member to the first member is larger than the adhesion force of the first gel-like member to the first member. The damper member according to claim 1, wherein the gel-like member continuously surrounds the entire circumference of the first member. The damper member according to claim 1 or 2, wherein the gel-like member has a cylindrical shape. The damper member according to any one of claims 1 to 3, wherein the second gel-like member extends from the chamfered portion to the second member. Movable and fixed bodies,
A drive mechanism that vibrates the movable body with respect to the fixed body,
The damper member according to any one of claims 1 to 4 is provided.
One of the movable body and the fixed body includes an inner peripheral side portion arranged on the inner peripheral side of the other of the movable body and the fixed body, and the other of the movable body and the fixed body is the inner peripheral side portion of the movable body and the fixed body. It has an outer peripheral side that surrounds the outer peripheral side of the
The damper member is
The first member is fixed to the inner peripheral side portion, and the first member is fixed to the inner peripheral side portion.
An actuator characterized in that the second member is fixed to the outer peripheral side portion. The actuator according to claim 5, wherein the damper member connects the movable body and the fixed body on one end side and the other end side in the vibration direction of the movable body. Movable and fixed bodies,
A drive mechanism that vibrates the movable body with respect to the fixed body,
It has a gel-like member that connects the fixed body and the movable body, and has
One of the movable body and the fixed body includes an inner peripheral side portion arranged on the inner peripheral side of the other of the movable body and the fixed body, and the other of the movable body and the fixed body is the inner peripheral side portion of the movable body and the fixed body. It has an outer peripheral side that surrounds the outer peripheral side of the
The gel-like member is
A first gel-like member connecting the inner peripheral side portion and the outer peripheral side portion,
A chamfered portion formed on the edge of the inner peripheral side portion and a second gel-like member connected to the first gel-like member are provided.
An actuator characterized in that the adhesion force of the second gel-like member to the inner peripheral side portion is larger than the adhesion force of the first gel-like member to the inner peripheral side portion. The actuator according to claim 7, wherein the gel-like member continuously surrounds the entire circumference of the inner peripheral side portion. The actuator according to claim 7 or 8, wherein the gel-like member has a cylindrical shape. The actuator according to any one of claims 7 to 9, wherein the second gel-like member extends from the chamfered portion to the outer peripheral side portion. The actuator according to any one of claims 7 to 10, wherein the gel-like member connects the movable body and the fixed body on one end side and the other end side in the vibration direction of the movable body.

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