JP7393278B2 - Damper members and actuators - Google Patents

Description

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

Some actuators include a fixed body, a movable body, a magnetic drive mechanism that vibrates the movable body relative 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 that accommodates the movable body and a holder that holds a coil. The gel-like damper member has one surface in the thickness direction bonded to the yoke, and the other surface bonded to the cover member.

JP 2019-13086 Publication

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 handling the cut gel-like member as a single component, it is difficult to handle. Further, in the structure of Patent Document 1, the gel-like damper member is assembled in such a manner that it can also be deformed in a direction perpendicular to the vibration direction. Therefore, there is a problem that the movable body tends to move in an unintended direction.

Therefore, the present inventors placed a cylindrical gel-like member in the gap between the frame-like first member and the second member (inner frame and outer frame), and the cylindrical gel-like member connected the first member to the first member. A damper member having a structure in which a second member is connected is proposed. An actuator has a structure in which the first member (inner frame) is fixed to the shaft, which is the part on the movable body side, and the second member (outer frame) is fixed to the case, which is the part on the fixed body side. ) is difficult to move in the direction perpendicular to the

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 cylindrical gel-like member. The inner peripheral part 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 circumferential 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 is shaped to fit into the tapered chamfered portion, the gel-like member is likely to peel off from the first member when stress is concentrated in this portion. Therefore, there is a problem that the damper member is easily broken and has low durability.

In view of the above problems, an object of the present invention is to provide a damper member in which a frame-shaped first member and a second member are connected by a cylindrical gel-like member, and a movable body that connects a frame-shaped first member and a second member through a cylindrical gel-like member. Another object of the present invention is to propose a structure in which a gel-like member is difficult to peel off from a frame member on the inner peripheral side when stress is concentrated on the inner peripheral part of the gel-like member in an actuator for connecting solid objects.

In order to solve the above problems, a damper member according to the present invention includes a first member, a second member surrounding the outer peripheral side of the first member, and a damper member disposed between the first member and the second member. a gel-like member, the gel-like member has a first gel-like member connecting the first member and the second member, a chamfered portion formed on an edge of the outer peripheral surface of the first member, and a second gel-like member connected to the first gel-like member, 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 molded between the inner frame member (first member) and the outer frame member (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, there is no need to perform bonding work of the gel-like member when connecting the movable body and the fixed body. Therefore, assembly of the actuator is easy. In addition, while the first gel-like member having characteristics necessary as a damper member is used in the part connecting the first member and the second member, the first gel-like member is used in the inner peripheral part where stress is concentrated. The portion connected to the chamfered portion uses a reinforcing second gel-like member to enhance adhesion to the first member. Therefore, when stress is concentrated on the inner peripheral portion of the gel-like member, the damper member is difficult to peel off from the chamfered portion, and the damper member 10 is difficult to break. Therefore, durability can be increased while ensuring the characteristics necessary 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 deforms in the direction of collapse, so that the first member moves 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 suppress the movable body from moving in a direction different from the vibration direction.

In the present invention, it is preferable that the gel-like member has a cylindrical shape. In this way, the gel-like members are arranged evenly around the entire circumference. Therefore, since the spring constant of the gel-like member can be made uniform over the entire circumference, when an actuator that vibrates the movable body in the axial direction is configured, the movable body does not tend to move in a particular 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 chamfer to the second member. When the gel-like member is manufactured by casting, the gel-like member spreads into 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 flows along the bottom surface of the mold member. It spreads and spreads from the chamfer of the first member to the second member. Thereby, the chamfered portion can be protected by the second gel-like member. Thereafter, 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 includes a movable body and a fixed body, a drive mechanism that vibrates the movable body with respect to the fixed body, and the damper member, and includes a movable body and a fixed body. One of the movable bodies and the fixed body includes an inner circumferential side portion disposed on the inner circumferential side of the other of the movable body and the fixed body, and the other of the movable body and the fixed body includes an outer circumferential side portion surrounding the outer circumferential side of the inner circumferential side portion. The damper member is characterized in that the first member is fixed to the inner peripheral portion, and the second member is fixed to the outer peripheral 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 assembly of the actuator is easy. Further, the gel-like member is difficult to peel off from the first member when the movable body vibrates, and the damper member is difficult to break, so the durability of the actuator can be improved. Furthermore, by increasing the durability of the damper member, the permissible 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 at one end side and the other end side in the vibration direction of the movable body. In this way, both ends of the movable body in the vibration direction are supported by the damper member. Therefore, the movable body can be stably supported and the movable body can be prevented from moving in an unintended direction.

Next, the present invention can be applied to an actuator in which a gel-like member is directly molded between a movable body and a fixed body. That is, the actuator of the present invention includes a movable body and a fixed body, a drive mechanism that vibrates the movable body with respect to the fixed body, and a gel-like member that connects the fixed body and the movable body. , one of the movable body and the fixed body includes an inner circumferential side portion disposed on the inner circumferential side of the other of the movable body and the fixed body, and the other of the movable body and the fixed body is provided with an inner circumferential side portion of the other of the movable body and the fixed body. an outer circumferential portion surrounding the outer circumferential side of the portion, the gel-like member comprising a first gel-like member connecting the inner circumferential portion and the outer circumferential portion; and a first gel-like member formed at an edge of the inner circumferential portion. a chamfered portion and a second gel-like member connected to the first gel-like member, and the adhesion force of the second gel-like member to the inner circumference side portion is determined by the inner circumference of the first gel-like member. It is characterized by a stronger adhesion force than the side portions.

According to the present invention, since the movable body and the fixed body are connected by the damper member, the gel-like member is difficult to peel off from the inner circumference side portion when the movable body vibrates. Therefore, the durability of the actuator can be improved. Furthermore, since the actuator has high durability, the permissible range of amplitude when vibrating the movable body can be increased. Therefore, the movable body can be vibrated with a large amplitude. Thereby, the permissible 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 circumference side portion. In this way, the gel-like member is arranged around 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 deforms in the direction of collapse, so 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 suppress the movable body from moving in a direction different from the vibration direction.

In the present invention, it is preferable that the gel-like member has a cylindrical shape. In this way, the gel-like members are arranged evenly around the entire circumference. Therefore, since the spring constant of the gel-like member can be made uniform over the entire circumference, the movable body does not tend to move in a particular 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 mentioned above, when the gel-like member is manufactured by casting, the gel-like member spreads into such a shape. In other words, when a member with an inner circumferential side portion and a member with an outer circumferential side portion are positioned on the mold member and a gel material forming the second gel-like member is discharged into the gap between the two members, the gel material will form a part of the mold member. It spreads along the bottom surface, and extends from the chamfer on the inner circumferential side to the outer circumferential side. Thereby, the chamfered portion can be protected by the second gel-like member. Thereafter, by discharging the gel material forming the first gel-like member, the inner circumference side portion and the outer circumference 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 at one end side and the other end side in the vibration direction of the movable body. In this way, both ends of the movable body in the vibration direction are supported by the gel-like member. Therefore, the movable body can be stably supported and the movable body can be prevented from moving in an unintended direction.

According to the present invention, the inner frame member (first member or inner circumferential portion) and the outer circumferential frame member (second member or outer circumferential portion) are connected by the gel-like member. For the gel-like member, the first gel-like member having the characteristics necessary as a damper member is used at the part connecting the inner frame material and the outer frame material, while the inner gel member is used at the inner circumference where stress is concentrated. A second gel-like member for reinforcement is used for reinforcing portions that are connected to the chamfered portions of the peripheral frame material and are likely to peel off, thereby increasing adhesion to the inner peripheral frame material. Therefore, when stress is concentrated on the inner circumference of the gel-like member, the gel-like member is difficult to peel off from the frame material on the inner circumference side, so durability can be increased while ensuring the characteristics required as a damper member. .

1 is a sectional view of an actuator according to an embodiment of the present invention. FIG. 2 is an exploded perspective view of the actuator of FIG. 1 viewed from one side in the axial direction. FIG. 2 is an exploded perspective view of the actuator of FIG. 1 viewed from the other side in the axial direction. FIG. 3 is a cross-sectional view schematically showing the configuration of a damper member. It is an explanatory view of a manufacturing method of a damper member. It is a sectional view showing typically the composition of the damper member of a modification.

Embodiments of the present invention will be described below with reference to the drawings. Note that 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 direction of the axis L 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 locations, one side L1 and the other side L2 in the direction of the axis L, but in the present invention, the damper member 10 may be arranged in one place or in three or more places. Furthermore, in the embodiment described below, the movable body 3 is arranged on the inner circumferential side of the fixed body 2, but in the present invention, an aspect in which the movable body 3 is arranged on the outer circumferential side of the fixed body 2 is adopted. It's okay.

Further, in the embodiment described below, a magnetic drive mechanism 6 is used as a drive mechanism for vibrating the movable body 3 with respect to the fixed body 2. The magnetic drive mechanism 6 includes a magnet 61 disposed on the movable body 3 and a coil 62 disposed on the fixed body 2. However, in the present invention, a configuration in which the magnet 61 and the coil 62 are arranged in reverse is used. It is also possible to adopt That is, the magnetic drive mechanism 6 may adopt a mode including a coil 62 disposed on the movable body 3 and a magnet 61 disposed on the fixed body 2.

(overall structure)
FIG. 1 is a sectional view of an actuator 1 according to an embodiment of the invention. FIG. 2 is an exploded perspective view of the actuator 1 shown in FIG. 1 viewed from one side L1 in the axial direction. FIG. 3 is an exploded perspective view of the actuator 1 shown in FIG. 1 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 disposed on the movable body 3 and a coil 62 disposed on the fixed body 2, and moves the movable body 3 relative to the fixed body 2 in the direction of the axis L.

(damper member)
The movable body 3 is connected to the fixed body 2 via the damper member 10 at each position of an end on one side L1 in the axis L direction and an end on the other side L2 in the axis L direction. Hereinafter, the damper member 10 disposed on one side L1 in the direction of the axis L will be referred to as a first damper member 10A, and the damper member 10 disposed on the other side L2 in the direction of the axis L will be 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 surrounding the outer peripheral side of the first member 11 , and a gel-like member 14 disposed 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 coaxially arranged. The gel-like member 14 has a cylindrical shape with a constant thickness in the radial direction. The inner peripheral part of the gel-like member 14 is connected to the first member 11 , and the outer peripheral part of the gel-like member 14 is connected to the second member 12 .

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

The first member 11 is fixed to the movable body 3. The first member 11 vibrates in the direction of the axis L integrally with the movable body 3. 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 direction of the axis L, the gel-like member 14 deforms in the shearing direction.

(fixed body)
The fixed body 2 includes a cylindrical case 20, a first lid member 21 that closes an opening on one side L1 of the case 20 in the axis L direction, and a second lid that closes an opening on the other side L2 of the case 20 in the axis L direction. A member 22 and a coil holder 4 disposed inside the case 20 between the first lid member 21 and the second lid member 22. 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, the first lid member 21 and the second lid member 22 each include claw portions 27 at three locations. The claw portion 27 can be elastically deformed 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 with a locking portion 28 provided on the edge of the case 20, the first lid member 21 and the second lid member 22 are prevented from coming off from the case 20.

The coil holder 4 includes a holder annular portion 41 and a body portion 42 that protrudes from the holder annular portion 41 toward 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 inside 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.

A coil 62 is fixed to the body portion 42 of the coil holder 4. An end portion of a coil wire (not shown) drawn out from the coil 62 is wrapped around a terminal pin that protrudes radially outward from the holder annular portion 41 . The coil wire is connected to the board 63 via terminal pins. As shown in FIG. 2, the substrate 63 is fixed in a 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 toward the inner circumference from a position on the L1 side of the second lid member 22. As shown in FIG. The second lid member 22 is fixed to the case annular portion 25 from the L2 side. Further, the case annular portion 25 includes 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 includes a shaft 31 extending in the direction of the axis L at the radial center of the fixed body 2, a magnet 61 fixed approximately at the center of the shaft 31 in the direction of the axis L, and a first yoke that overlaps the magnet 61 on the L1 side. 32, and a second yoke 33 that overlaps the magnet 61 on the L2 side.

The magnet 61 has a cylindrical shape and is magnetized to have north and south poles in the direction of the axis L. The shaft 31 extends in the direction of the axis L at the radial center of the fixed body 2. The body portion 42 of the coil holder 4 is arranged coaxially with the magnet 61 on the outer peripheral side of 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 is slightly larger than the outer diameter of the magnet 61 . The outer circumferential surface of the first yoke 32 extends radially outward from the outer circumferential surface of the magnet 61. The first yoke 32 is fixed to the L1 side surface of the magnet 61 by adhesive or the like.

The second yoke 33 is composed of two magnetic plates (a first magnetic plate 34 and a second magnetic plate 35). The first magnetic plate 34 includes an end plate portion 341 fixed to the L2 side surface of the magnet 61 by a method such as adhesive, and a cylindrical side plate portion 342 extending from the outer edge of the end plate portion 341 toward 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 disc shape that is slightly smaller than the end plate portion 341 of the first magnetic plate 34 . The second magnetic plate 35 is laminated on the L1 side of the end plate 341 of the first magnetic plate 34 and welded to the end plate 341. The second magnetic plate 35 is fixed to the L2 side surface of the magnet 61 by adhesive or the like.

The shaft 31 includes a first end 311 that projects from the first yoke 32 toward the L1 side, and a second end 312 that projects 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 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)
In the actuator 1, by energizing the coil 62, the magnetic drive mechanism 6 generates a driving force that drives the movable body 3 in the axis L direction. When the coil 62 is de-energized, the movable body 3 returns to its original position by the restoring force of the gel-like member 14. Therefore, by intermittently energizing the coil 62, the movable body 3 vibrates in the direction of the axis L.

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

When the movable body 3 vibrates in the direction of the axis L relative to the fixed body 2, the damper member 10 is fixed to the first member 11 fixed to the inner circumference of the gel-like member 14 and the outer circumference of the gel-like member 14. The second member 12 moves relative to the second member 12 in the direction of the axis L. Therefore, the gel-like member 14 deforms in the shear direction following the vibration of the movable body 3.

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

(Gel-like member)
FIG. 4 is a cross-sectional view schematically showing the structure 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.

The first member 11 has a cylindrical shape and includes a large diameter portion 15 and a small diameter portion 16 smaller in diameter than 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 one side LA1. The inner periphery of the gel-like member 14 is connected to the outer periphery 150 of the large diameter portion 15 , and the outer periphery of the gel-like member 14 is connected to the inner periphery 120 of the second member 12 .

Both the first member 11 and the second member 12 are made of metal. A chamfered portion 18 is formed on the edge of the other side LA2 of the outer circumferential surface 150 of the large diameter portion 15 for removing burrs formed during manufacturing of the first member 11. As shown in FIG. 4, the chamfered portion 18 has a tapered shape in which the edge of the outer circumferential surface 150 is cut diagonally, and is formed around the entire circumference. Although not shown in FIG. 4, chamfers are also formed in other parts of the first member 11 and the second member 12. For example, on the edge of the outer circumferential surface of the small diameter portion 16, the edge of the inner circumferential surface of the first member 11, the edge of the outer circumferential surface of the second member 12, and the edge of the inner circumferential 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. The end surface of the other side LA2 of the gel-like member 14 is the surface that comes into contact with the manufacturing mold, so 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 in FIGS. 1-3, illustration of the first gel-like member 141 and the second gel-like member 142 is omitted, and only the overall shape of the gel-like member 14 is shown. The second gel-like member 142 extends over the entire end surface of the other side LA2 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 circumferential surface 120 of the second member 12 . The first gel-like member 141 is stacked 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 greater than the adhesion force of the first gel-like member 141 to the first member 11. Here, the adhesion force (adhesion strength) is a property 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 so thin that it hardly affects 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 silicone gel with a penetration degree of 90 degrees to 110 degrees. The second gel-like member 142 may or may not be a silicone gel with a penetration degree of 90 degrees to 110 degrees. Note that the thickness of the second gel-like member 142 can also be made thicker than in this embodiment. In this case, the spring constant of the gel-like member 14 is the sum of 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 of manufacturing the damper member 10. A 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 includes a first step of assembling the first member 11 and the second member 12 to a manufacturing jig 90, and filling a gap S between the first member 11 and the second member 12 with gel material. The method includes a second step, a third step of heating and curing the gel material, and a fourth step of removing the damper member 10 from the manufacturing jig 90.

In the first step, by positioning the first member 11 and the second member 12 in contact with the manufacturing jig 90, a radial gap S is created between the first member 11 and the second member 12. Form. As shown in FIG. 5, in the first step, the 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 face of the large diameter portion 15 of the first member 11 is inserted into the circular recess 91. from the L1 side. Further, the second member 12 is inscribed in 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 has a constant width in the radial direction over the entire circumference.

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

In the second step, the gap S between the first member 11 and the second member 12 is filled with a gel material before hardening. Since the gel-like member 14 of this embodiment includes two layers, the first gel-like member 141 and the second gel-like member 142, 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 into the gap S from the dispenser 93. 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 material (the first gel-like member 141 and the second gel-like member 142) is heated together with the manufacturing jig 90, and is cured by maintaining it at a specified temperature for a specified period of time. As a result, the gel-like member 14 is formed in the gap S. When the gel materials (the first gel material G1 and the second gel material G2) are heated and cured, the portions in contact with the primer 13 react with the primer 13, and the outer peripheral surface 150 of the large diameter portion 15 and the second member 12 are heated. It is fixed to the inner peripheral surface 120. Therefore, the gel-like member 14 after curing 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 an ejector pin is provided in the surface of the manufacturing jig 90 that the first member 11 contacts and the surface that the second member 12 contacts, and the ejector pin is used to arrange the ejector pin. The damper member 10 is removed from the manufacturing jig 90.

(Main effects of this form)
As described above, the damper member 10 of the present embodiment includes the first member 11, the second member 12 surrounding the outer peripheral side of the first member 11, and the gel-like material disposed 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 the second gel-like member 142. The adhesion force of the second gel-like member 142 to the first member 11 is greater than the adhesion force of the first gel-like member 141 to the first member 11 .

Further, the actuator 1 of this 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 circumferential side part) arranged at the radial center of the actuator 1, and the fixed body 2 includes an outer circumferential side part (holder annular part 41 and case annular part) surrounding the outer circumferential side of the shaft 31. part 25). 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 an inner frame member (first member 11) and an outer frame member (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, when connecting the movable body 3 and the fixed body 2, the gel-like member 14 There is no need to perform adhesive work. Therefore, assembly of the actuator 1 is easy.

Further, in the gel-like member 14, the part connecting the first member 11 and the second member 12 is constituted by the first gel-like member 141 having characteristics necessary as a damper, while the inner peripheral part where stress is concentrated A portion of the first member 11 connected to the chamfered portion 18 uses a reinforcing second gel-like member 142 to improve 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 difficult to peel off from the chamfered portion 18, and the damper member 10 is difficult to break. Therefore, durability can be increased while ensuring the characteristics necessary for the damper member 10.

By using such a damper member 10, when the movable body 3 vibrates, the gel-like member 14 is difficult to peel off from the first member 11, and the damper member 10 is difficult to break. Therefore, the durability of the actuator 1 can be improved. Furthermore, by making the damper member 10 difficult to break, the permissible range of amplitude when vibrating the movable body 3 can be increased. 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. Thereby, 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 around 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 deforms in the crushing direction, but the spring constant when the gel-like member 14 deforms in the crushing direction changes in the shearing direction. is larger than the spring constant when Therefore, it is possible to suppress 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 arranged evenly around 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 tend to move in a particular 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 spreads into such a shape. In this embodiment, since a thermosetting gel is used as the gel-like member 14, the time required for curing is long. Therefore, by molding the gel-like member 14 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 this embodiment, the damper member 10 connects the movable body 3 and the fixed body 2 at one end and the other end in the vibration direction of the movable body 3. Therefore, since both ends of the movable body 3 in the vibration direction are supported by the damper member 10, the movable body 3 can be stably supported and the movable body 3 can be prevented from moving in an unintended direction.

(Modified example)
(1) The damper member 10 of the above embodiment was made into a component by molding the gel-like member 14 between the frame-shaped first member 11 and the second member 12. It is applicable to a form in which the gel-like member 14 is directly molded 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 part 41 and the case annular part 25, the first member 11 is attached to the movable body 3. The second member 12 constitutes an inner circumferential side portion provided on the fixed body 2, and the second member 12 constitutes an outer circumferential 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 similarly to the above embodiment. That is, the first gel-like member 141 connects the inner circumferential side portion and the outer circumferential side portion, and the second gel-like member 142 connects the chamfered portion formed on the edge of the inner circumferential side portion and the first gel-like member 141. connected to. The adhesion force of the second gel-like member 142 to the inner circumference side portion is greater than the adhesion force of the first gel-like member 141 to the inner circumference side portion.

In this way, similarly to the above embodiment, the adhesiveness of the portion connected to the chamfer of the inner circumference side portion to the inner circumference side portion can be increased by using the reinforcing second gel-like member 142. Therefore, when stress is concentrated on the inner circumferential portion of the gel-like member 14, the gel-like member 14 is difficult to peel off from the inner circumferential side, so that the durability of the actuator can be improved. As a result, the permissible amplitude range when vibrating the movable body 3 can be increased, so the movable body 3 can be vibrated with a large amplitude.

(2) FIG. 6 is a sectional view of a damper member 110 according to a modified example. In the damper member 110 of FIG. 6, the second gel-like member 142 is disposed only near 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. A damper member 110 having the form shown in 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 material G2 is applied to the gap S between the first member 11 and the second member 12. What is necessary is to fill the material G1 and mold a gel-like member.

DESCRIPTION OF SYMBOLS 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... Second member, 13... Primer, 14... Gel 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... recess, 25... case annular part, 26... opening, 27... claw part, 28... locking part, 31... shaft, 32... second yoke, 33... second yoke, 34... third 1 Magnetic plate, 35... Second magnetic plate, 41... Holder annular part, 42... Body part, 44... Opening part, 61... Magnet, 62... Coil, 63... Substrate, 90... Manufacturing jig, 91... Circular recessed part , 92... Pin, 93... Dispenser, 94... Bottom surface, 110... Damper member, 120... Inner circumferential surface, 141... First gel-like member, 142... Second gel-like member, 150... Outer circumferential surface, 311... First end part, 312...second end part, 341...end plate part, 342...side plate part, G1...first gel material, G2...second gel material, L...axis line, 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;
a gel-like member disposed between the first member and the second member,
The gel-like member is
a first gel-like member connecting the first member and the second member;
A chamfer 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,
A damper member characterized in that the adhesion force of the second gel-like member to the first member is greater 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 chamfer to the second member. A movable body and a fixed body;
a drive mechanism that vibrates the movable body relative to the fixed body;
The damper member according to any one of claims 1 to 4,
One of the movable body and the fixed body includes an inner circumferential portion disposed on the inner circumferential side of the other of the movable body and the fixed body, and the other of the movable body and the fixed body includes the inner circumferential side portion. It has an outer circumferential portion that surrounds the outer circumferential side of the
The damper member is
the first member is fixed to the inner peripheral portion,
An actuator characterized in that the second member is fixed to the outer peripheral side portion. 6. The actuator according to claim 5, wherein the damper member connects the movable body and the fixed body at one end and the other end of the movable body in the vibration direction. A movable body and a fixed body;
a drive mechanism that vibrates the movable body relative to the fixed body;
a gel-like member connecting the fixed body and the movable body,
One of the movable body and the fixed body includes an inner circumferential portion disposed on the inner circumferential side of the other of the movable body and the fixed body, and the other of the movable body and the fixed body includes the inner circumferential side portion. It has an outer circumferential portion that surrounds the outer circumferential side of the
The gel-like member is
a first gel-like member connecting the inner circumferential side portion and the outer circumferential side portion;
comprising a chamfer formed on the edge of the inner circumferential portion and a second gel-like member connected to the first gel-like member,
An actuator characterized in that the adhesion force of the second gel-like member to the inner circumference side portion is greater than the adhesion force of the first gel-like member to the inner circumference side portion. The actuator according to claim 7, wherein the gel-like member continuously surrounds the entire circumference of the inner peripheral 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 chamfer to the outer circumferential portion. 11. The actuator according to claim 7, wherein the gel-like member connects the movable body and the fixed body at one end and the other end of the movable body in a vibration direction.

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