JP6955409B2 - Damper device - Google Patents

Description

The present invention relates to a damper device that regulates the flow rate of fluid passing through an opening.

Patent Document 1 describes a damper device that is arranged at an opening of a fluid passage through which a fluid such as cold air flows in a refrigerator to adjust the flow rate of the fluid passing through the opening. The damper device of Patent Document 1 includes a movable cover for adjusting the flow rate of the fluid, a drive unit for driving the movable cover, and a support for supporting the drive unit. The support includes a support-side opening that communicates with the opening of the fluid passage. The drive unit includes a motor as a drive source and a rotating body that rotates by driving the motor. The movable cover moves linearly between the contact position in contact with the support and the separation position away from the support by transmitting the rotation of the rotating body via the feed screw mechanism. When the movable cover is arranged at the contact position, the movable cover covers the support side opening, so that the flow of fluid through the opening is blocked. When the movable cover is placed at a distance, the fluid circulates through the opening, the support side opening, and the support and the movable cover.

Japanese Unexamined Patent Publication No. 2016-161232

When the movable cover is brought into contact with the support when adjusting the flow rate of the fluid passing through the opening, there is a problem that a collision sound is generated at the time of these contact.

In view of the above problems, an object of the present invention is to provide a damper device capable of suppressing the generation of collision noise between members when adjusting the flow rate of a fluid passing through an opening.

In order to solve the above problems, the damper device of the present invention includes a movable cover for adjusting the flow rate of gas passing through the opening, the movable cover, and a first position where the flow rate becomes the first flow rate. A drive unit that moves directly between a second position that is closer to the opening than the first position and has a second flow rate that is less than the first flow rate, and a support that supports the drive unit. A support having a portion, and one of the support and the movable cover includes a convex portion that projects the linear motion direction of the movable cover toward the support and the other of the movable cover. The other of the support and the movable cover is provided with a cushioning member at a position facing the convex portion in the linear motion direction, and the cushioning member is the convex portion when the movable cover is arranged at the first position. Is in contact with each other and is in a state of being elastically deformed.

In the present invention, when the movable cover is arranged at the first position in order to adjust the flow rate of the fluid passing through the opening, the convex portion provided on one of the movable cover and the support and the cushioning member provided on the other. Abut. Further, the cushioning member is in a state of being elastically deformed by contact with the convex portion when the movable cover is arranged at the first position. Therefore, it is possible to prevent or suppress the generation of collision noise when the movable cover is arranged at the first position.

In the present invention, when viewed from the linear motion direction, the tip of the convex portion may be smaller than the cushioning member and may be located inside the contour of the cushioning member. In this way, when the movable cover is arranged at the first position, the convex portion can be surely brought into contact with the cushioning member. Further, when the movable cover is arranged at the first position, it is possible to prevent the convex portion of the movable cover from colliding with the portion of the support that is not covered by the cushioning member.

In the present invention, it is desirable that the tip of the convex portion is located most on the other side of the support and the movable cover in one of the support and the movable cover. In this way, when the movable cover is placed in the second position, it is possible to prevent one of the support and the movable cover from colliding with the other part of the support and the movable cover except for the convex portion. ..

In the present invention, the other of the support and the movable cover includes a facing surface facing one of the support and the movable cover in the linear motion direction, and the facing surface is viewed from the linear motion direction. It is desirable that the concave portion is provided at a position overlapping the convex portion, and the cushioning member is arranged in the concave portion. In this way, since the concave portion serves as a mark, it is easy to arrange the cushioning member on the other facing surface of the support and the movable cover.

In the present invention, the cushioning member can be a porous member.

In the present invention, one of the support and the movable cover includes, as the convex portion, three or more of the convex portions arranged so as to surround the support portion when viewed from the linear motion direction. It is desirable that the other of the support and the movable cover includes, as the cushioning member, a plurality of the cushioning members facing each of the plurality of convex portions in the linear motion direction. By doing so, the posture of the movable cover becomes stable when the movable cover is arranged in the first position. Therefore, when the movable cover is arranged at the first position, it is possible to prevent one of the support and the movable cover from colliding with the other of the support and the movable cover except for the convex portion.

In the present invention, the plurality of the convex portions have a shape long in the circumferential direction of the support portion when viewed from the linear motion direction, and the plurality of the cushioning members have a shape when viewed from the linear motion direction. The shape of the support portion may be long in the circumferential direction. By doing so, when the movable cover is arranged at the second position and each convex portion and each cushioning member come into contact with each other, it is possible to prevent or prevent the movable cover from being in an inclined posture on the outer peripheral side of the support portion. can. Therefore, when the movable cover is arranged at the second position, it is possible to prevent one of the support and the movable cover from colliding with the other portion of the support and the movable cover except for the convex portion.

In the present invention, it is desirable that the plurality of the convex portions are provided at positions surrounding the support portions at equal angular intervals when viewed from the linear motion direction. By doing so, the posture of the movable cover becomes stable when the movable cover is arranged at the second position. Therefore, when the movable cover is arranged at the second position, it is possible to prevent one of the support and the movable cover from colliding with the other portion of the support and the movable cover except for the convex portion.

In the present invention, the convex portion may be provided on the movable cover, and the cushioning member may be provided on the support.

In the present invention, in order to move the movable cover linearly between the first position and the second position, the drive unit is driven by a drive source and an axis line extending in the linear motion direction. The rotating body includes a rotating body that rotates around, the rotating body includes an engaging portion formed of a spiral convex portion or a concave portion on an outer peripheral surface, and the movable cover is formed with the engaging portion of the rotating body. A rotating body arranging hole in which the portion is arranged inside, and an engaged portion that engages with the engaging portion on the inner peripheral surface of the rotating body arranging hole to form the engaging portion and the feed screw mechanism. , Can be provided.

In the present invention, a guide mechanism for guiding the movable cover is provided, and the guide mechanism includes a guide shaft extending in the linear motion direction in one of the support and the movable cover, and the support and the movable cover. The other of the movable covers includes a guide hole into which the guide shaft is inserted and fitted, and the convex portion and the cushioning member are provided with the guide mechanism and the support portion when viewed from the linear motion direction. It is desirable to be located in between. In this way, when the movable cover is arranged at the second position, the convex portion provided on one of the support and the movable cover is brought into contact with the cushioning member provided on the other of the support and the movable cover. It becomes easy.

In the present invention, the drive unit includes a drive source and a rotating body driven by the drive source and rotating around an axis extending in the linear motion direction, and the rotating body has a spiral shape on an outer peripheral surface. The support has a fan fixing shaft that protrudes from the outer peripheral side of the support portion in the linear motion direction toward the movable cover side and allows the fan to be fixed to the tip. The movable cover includes a cover end plate portion having a cover-side facing surface facing the support in the linear motion direction, and the cover end plate portion is formed with the engaging portion of the rotating body. A rotating body arranging hole in which the portion is arranged inside, and an engaged portion that engages with the engaging portion on the inner peripheral surface of the rotating body arranging hole to form the engaging portion and the feed screw mechanism. A through hole through which the fan fixing shaft penetrates is provided on the outer peripheral side of the rotating body arrangement hole, and a cover-side recess through which the through hole opens to the bottom surface is provided on the cover-side facing surface. The convex portion is provided at a position overlapping both the outer peripheral edge of the cover-side recess and the opening edge of the cover-side recess on the cover-side facing surface, and is provided on a straight line connecting the axis and the center of the through hole. The cushioning member may be provided between the support portion and the fan fixing shaft in the support. In this way, the convex portion and the cushioning member can be arranged at a position closer to the drive unit than the fan fixing shaft in the radial direction centered on the axis of the rotating body of the drive unit. Therefore, it is easy to bring the convex portion provided on one side of the movable cover with which the support body on which the drive unit is supported and the rotating body of the drive unit are engaged and the cushioning member provided on the other side into contact with each other.

In the present invention, when the movable cover is arranged in the first position in order to adjust the flow rate of the fluid passing through the opening, the convex portion provided on one of the movable cover and the support and the buffer provided on the other. The members come into contact. Further, the cushioning member is in a state of being elastically deformed by contact with the convex portion when the movable cover is arranged at the first position. Therefore, it is possible to prevent or suppress the generation of collision noise when the movable cover is arranged at the first position.

It is a perspective view when the damper device to which this invention is applied is seen from the side of a support. It is a perspective view of the damper device in the state which the movable cover is in the 1st position. It is a perspective view of the damper device in the state which the movable cover is in a 2nd position. It is an exploded perspective view when the damper device is seen from the side of a support. It is an exploded perspective view when the damper device is seen from the side of a movable cover. It is an exploded perspective view of a support body and a drive unit. It is an exploded perspective view of a drive unit. It is explanatory drawing of wiring routing. It is explanatory drawing of the state which the movable cover is in a 1st position.

Hereinafter, embodiments of the damper device to which the present invention is applied will be described with reference to the drawings.

(overall structure)
FIG. 1 is a perspective view of a damper device to which the present invention is applied when viewed from the side of a support. FIG. 2 is a perspective view of the damper device when the movable cover is in the first position when viewed from the side of the movable cover. FIG. 3 is a perspective view of the damper device when the movable cover is in the second position as viewed from the side of the movable cover. FIG. 4 is an exploded perspective view of the damper device when viewed from the side of the support. FIG. 5 is an exploded perspective view of the damper device when viewed from the side of the movable cover. FIG. 6 is an exploded perspective view of the support and the drive unit. The damper device 1 controls the flow rate of the fluid flowing through the opening O of the fluid passage such as a duct through which the fluid flows. In this example, the damper device 1 adjusts the flow rate of the cold air flowing through the opening O provided in the cold air passage in the refrigerator. The damper device 1 is arranged outside the cold air flow path.

As shown in FIGS. 2 and 3, the damper device 1 has a movable cover 2 for adjusting the flow rate of cold air flowing through the opening O, and a movable cover 2 in a direction of approaching and away from the opening O. It has a drive unit 3 for linear drive and a support 4 for supporting the drive unit 3. Further, the damper device 1 has a wiring 5 for supplying electric power to the drive unit 3. In FIGS. 2 and 3, the cold air flow path is on the opposite side of the damper device 1 with the opening 0 interposed therebetween.

As shown in FIG. 1, the support 4 has a square-shaped end plate portion 11 located on one side of the movable cover 2 and a movable cover from one of four sides defining the outer peripheral edge of the end plate portion 11. A side plate portion 12 extending to the side of 2 is provided. The end plate portion 11 extends perpendicular to the direction of linear movement in which the movable cover 2 moves linearly. A support portion 13 for supporting the drive unit 3 is provided at the central portion of the end plate portion 11. As shown in FIG. 2, the drive unit 3 is attached to the support portion 13 and projects toward the movable cover 2.

The movable cover 2 has a first position 2A in which the flow rate of the cold air flowing through the opening O is the first flow rate and a second position 2B in which the flow rate is smaller than the first flow rate by driving the drive unit 3. It moves directly with. As shown in FIG. 2, in the first position 2A, the movable cover 2 is arranged at a position close to the end plate portion 11 apart from the opening O. As shown in FIG. 3, in the second position 2B, the movable cover 2 is arranged at a position farther from the end plate portion 11 than the first position 2A, and is closer to the opening O than the first position 2A.

In the following description, the posture of the damper device 1 shown in FIGS. 1 to 3 is referred to as the installation posture 1A of the damper device 1. In the installation posture 1A, the linear motion direction of the movable cover 2 is the horizontal direction. Further, in the installation posture 1A, the three directions orthogonal to each other are the X direction, the Y direction, and the Z direction. The X direction is the linear motion direction of the movable cover 2, and is the horizontal direction when the damper device 1 is in the installation posture 1A. The Y direction is the width direction of the damper device 1, and the Z direction is the vertical direction. Further, in the X direction (linear motion direction), the side where the end plate portion 11 is located is the X1 direction, and the side where the movable cover 2 is located is the X2 direction. The side where the side plate portion 12 is located in the Y direction is the Y1 direction, and the opposite side is the Y2 direction. Further, the lower part in the Z direction is the Z1 direction, and the upper part in the Z direction is the Z2 direction. In the installation posture 1A, the end surface 11a of the end plate portion 11 faces the X1 direction. Further, in the installation posture 1A, the side plate portion 12 includes a side surface 12a extending in the vertical direction toward the Y1 direction. The end surface 11a of the end plate portion 11 and the side surface 12a of the side plate portion 12 are orthogonal to each other. Hereinafter, the damper device 1 will be described in the installation posture 1A.

(Support)
The support 4 is made of resin. The support portion 13 that supports the drive unit 3 is provided in the central portion of the end plate portion 11. As shown in FIG. 1, the support portion 13 is coaxial with the first cylinder portion 15 protruding from the end plate portion 11 in the X1 direction and the first cylinder portion 15 as shown in FIG. A second tubular portion 16 projecting in the X2 direction is provided. The center hole 15a of the first cylinder portion 15 and the center hole 16a of the second cylinder portion 16 communicate with each other through a through hole 11b provided in the end plate portion 11. The center hole 15a of the first tubular portion 15 has a smaller diameter than the central hole 16a of the second tubular portion 16. As shown in FIG. 1, in the first tubular portion 15, a notch 17 is provided in a part in the circumferential direction in the Y1 direction (the side on which the side plate portion 12 is located).

The end surface 11a of the end plate portion 11 facing the X1 direction is provided with a wiring arrangement groove 18 extending from the notch 17 of the first cylinder portion 15 to the side surface 12a of the side plate portion 12. The wiring arrangement groove 18 is inclined in the Z1 direction from the inner peripheral side groove portion 19 extending horizontally from the notch 17 (support portion 13) and the outer peripheral side end of the inner peripheral side groove portion 19 toward the side plate portion 12. An inclined groove portion 20 and an outer peripheral side groove portion 21 extending horizontally from the outer peripheral side end of the inclined groove portion 20 and reaching the side surface 12a of the side plate portion 12 are provided. The end of the outer peripheral side groove portion 21 on the side plate portion 12 is open to the side surface 12a. In the wiring arrangement groove 18, the inner peripheral side groove portion 19 is a portion close to the support portion 13, and the outer peripheral side groove portion 21 is a portion close to the side plate portion 12. The end opening 18b of the wiring arrangement groove 18 (outer peripheral side groove portion 21) exposed on the side surface 12a is a rectangle long in the vertical direction.

An opening 22 is provided in the bottom portion 18a of the inclined groove portion 20. As shown in FIGS. 5 and 6, a tubular portion 23 projecting in the X2 direction from a portion overlapping the opening edge of the opening 22 is provided on the facing surface 11c of the end plate portion 11 facing the movable cover 2 side. There is.

Further, as shown in FIGS. 1 and 4, the end plate portion 11 includes a first claw portion 25 projecting inward of the inner peripheral gutter portion 19 and a second claw portion 26 projecting inward of the outer peripheral gutter portion 21. , Equipped with. The first claw portion 25 protrudes in the Z2 direction, and the second claw portion 26 protrudes in the Z1 direction. The first claw portion 25 and the second claw portion 26 are separated from the bottom portion 18a of the wiring arrangement groove 18 in the X1 direction, respectively.

More specifically, as shown in FIG. 1, the inner peripheral side groove portion 19 includes a lower side wall surface portion 19a extending in the horizontal direction, and an upper wall surface portion 19b extending in the Z2 direction of the lower side wall surface portion 19a in parallel with the lower side wall surface portion 19a. A bottom portion 18a connecting the lower side wall surface portion 19a and the upper wall surface portion 19b is provided. The first claw portion 25 projects in the Z2 direction from the end portion of the lower side wall surface portion 19a in the X1 direction. At the upper end of the first claw portion 25, a first protrusion 27 projecting toward the bottom portion 18a is provided. On the other hand, the outer peripheral side groove portion 21 includes a lower side wall surface portion 21a extending in the horizontal direction, an upper wall surface portion 21b extending in parallel with the lower side wall surface portion 21a in the Z2 direction of the lower side wall surface portion 21a, and a lower wall surface portion 21a and an upper wall surface portion 21b . It is provided with a bottom portion 18a to be connected. The second claw portion 26 projects in the Z1 direction from the end portion of the upper wall surface portion 21b of the outer peripheral side groove portion 21 in the X1 direction. At the lower end of the second claw portion 26, a second protrusion 28 projecting toward the bottom portion 18a is provided.

Here, when the support 4 is viewed from the side in the Y1 direction (horizontal direction), the first claw portion 25 and the second claw portion 26 partially overlap each other. Further, the first claw portion 25 and the second claw portion 26 are provided inside the wiring arrangement groove 18, and do not project from the end surface 11a of the end plate portion 11 in the X1 direction.

Further, as shown in FIGS. 2 and 6, the end plate portion 11 includes three fan fixing shafts 31 to 33 protruding in the X2 direction and two guide shafts 34 and 35. The three fan fixing shafts 31 to 33 and the two guide shafts 34 and 35 are all located on the outer peripheral side of the support portion 13. Further, the three fan fixing shafts 31 to 33 and the two guide shafts 34 and 35 are all located on the outer peripheral side of the drive unit 3 attached to the support portion 13.

The three fan fixing shafts 31 to 33 are provided at positions that surround the support portions 13 at equal angular intervals. A centrifugal fan (not shown) is arranged at the tip of the fan fixing shafts 31 to 33 at a position facing the opening O on the outside of the cold air flow path, and cold air is sent from the opening O to the damper device 1. In some cases, the centrifugal fan is connected. As a result, the centrifugal fan is arranged at a position facing the opening O while being supported by the support body 4.

The two guide shafts 34 and 35 are provided on the outer peripheral side of the three fan fixing shafts 31 to 33. The two guide shafts 34 and 35 are a part of the configuration of the guide mechanism 30 that guides the movable cover 2 in the X direction. One of the two guide shafts 34 and 35, the guide shaft 34, projects in the X2 direction from the portion of the end plate portion 11 on the Z1 direction side in the Y1 direction. The other guide shaft 35 projects in the X2 direction from the portion of the end plate portion 11 on the Z2 direction side in the Y2 direction.

Further, as shown in FIG. 5, the end plate portion 11 includes three cushioning members 37 to 39 on the facing surface 11c. The three cushioning members 37 to 39 are arranged on the inner peripheral side of the guide shafts 34 and 35. Further, the three cushioning members 37 to 39 are arranged between the three fan fixing shafts 31 to 33 and the support portion 13.

Each of the cushioning members 37 to 39 is fixed to the inside of each of the three recesses 41 to 43 provided on the facing surface 11c of the end plate portion 11 with an adhesive or the like. The recesses 41 to 43 are each rectangular, and are formed at positions surrounding the support portions 13 at equal angular intervals. The longitudinal direction of each of the recesses 41 to 43 is directed to the circumferential direction of the support portion 13. The cushioning members 37 to 39 have a rectangular parallelepiped shape, and the shape when viewed from the linear motion direction is a rectangle that can be arranged in the recesses 41 to 43. The buffer members 37 to 39 are arranged at positions that surround the support portions 13 at equal angular intervals by being arranged in the recesses 41 to 43. Further, the buffer members 37 to 39 have their longitudinal directions oriented in the circumferential direction of the support portion 13. The cushioning members 37 to 39 are elastic members and porous members. As the buffer members 37 to 39, polyurethane foam, rubber, sponge or the like can be used. The materials of the cushioning members 37 to 39 are selected according to the usage environment.

Next, as shown in FIG. 1, the side plate portion 12 includes a wiring locking portion 45, a first binding portion 46, and a second binding portion 47. The wiring locking portion 45 includes a protruding portion 51 projecting from the side surface 12a of the side plate portion 12 in the Y1 direction, a first locking portion 52 extending in the Z1 direction from the tip portion of the protruding portion 51 along the side surface 12a, and a protruding portion. A second locking portion 53 extending from the tip end portion of the 51 along the side surface 12a in the Z2 direction is provided. The protruding portion 51 of the wiring locking portion 45 is provided at a height position that overlaps with the end opening 18b of the wiring arrangement groove 18 exposed on the side surface 12a of the side plate portion 12 in the Z direction. The protruding portion 51 of the wiring locking portion 45 is at the same height position as the central portion of the outer peripheral side groove portion 21 of the wiring arrangement groove 18 in the Z direction in the Z direction.

Further, the wiring locking portion 45 is the side of the first retaining portion 54 extending from the lower end portion of the first locking portion 52 toward the side plate portion 12 (side surface 12a) and the side plate portion 12 of the first retaining portion 54. A first inclined portion 55 extending in a direction away from the side plate portion 12 in the Z1 direction from the end of the Further, the wiring locking portion 45 is the side of the second retaining portion 56 extending from the upper end portion of the second locking portion 53 toward the side plate portion 12 (side surface 12a) and the side plate portion 12 of the second retaining portion 56. A second inclined portion 57 extending in a direction away from the side plate portion 12 in the Z2 direction from the end thereof is provided.

The first binding portion 46 is provided in the Z1 direction of the wiring locking portion 45. The second binding portion 47 is provided in the Z2 direction of the wiring locking portion 45. The first binding portion 46 and the second binding portion 47 are sites where the binding band 59 can be bound. The first binding portion 46 and the second binding portion 47 have the same shape. When viewed from the Z direction, the first binding portion 46 and the second binding portion 47 are provided at positions overlapping with the wiring locking portion 45. Each of the first binding portion 46 and the second binding portion 47 has a groove 60 extending linearly in the X direction on the side surface 12a of the side plate portion 12 and a lower side of the side surface 12a of the side plate portion 12 with the groove 60 sandwiched between them. A lower protrusion 61 protruding from the upper side in the Y1 direction, an upper protrusion 62 protruding from the upper side in the Y1 direction, and an end portion of the lower protrusion 61 extending in the Z direction along the side surface 12a on the side surface 12a. A connecting portion 63 for connecting the upper protrusion 62 to the end portion on the side surface 12a is provided.

(Drive unit)
FIG. 7 is an exploded perspective view of the drive unit 3. As shown in FIG. 6, the drive unit 3 includes a geared motor 65 and a rotating body 66 that is rotated by driving the geared motor 65. As shown in FIG. 7, the geared motor 65 is a reduction wheel that transmits the rotation of the motor body 67, the output gear 68, and the output shaft (not shown) of the motor body 67 (rotation of the motor body 67) to the output gear 68. With columns 69. The motor body 67 is a stepping motor. The motor body 67 is arranged so that the output shaft protrudes in the X2 direction. As shown in FIG. 6, the motor main body 67 includes a power feeding unit 70 to which the wiring 5 is connected to the end portion in the X1 direction (counter-output side).

Further, as shown in FIG. 7, the geared motor 65 includes an end plate member 71 fixed to the end surface 11a on the output side of the motor body 67, and a case 72 covered with the end plate member 71 from the X2 direction. The reduction wheel train 69 is housed between the end plate member 71 and the case 72. The reduction wheel train 69 transmits the rotation of the output shaft of the motor body 67 to the output gear 68. The output gear 68 projects in the X2 direction from the opening 72a provided on the end face of the case 72 in the X2 direction.

Here, the geared motor 65 is X2 in the center hole of the support portion 13 of the support body 4 (the center hole 15a of the first cylinder portion 15, the center hole 16a of the second cylinder portion 16 and the through hole 11b of the end plate portion 11). It is fitted from the direction side. When the geared motor 65 is fitted into the support portion 13, the end portion of the motor body 67 in the X1 direction is inserted into the center hole 15a of the first tubular portion 15 from the side in the X2 direction. As a result, the end portion of the motor body 67 in the X1 direction is in a state of being fitted to the first cylinder portion 15. Further, as shown in FIG. 1, the power feeding portion 70 of the motor main body 67 is arranged at an angle position corresponding to the notch 17 of the first cylinder portion 15. Therefore, it is easy to pull out the wiring 5 connected to the power feeding unit 70 into the wiring arrangement groove 18. Further, as shown in FIG. 6, the geared motor 65 is fixed to the support portion 13 by two screws 74 penetrating the case 72 from the side in the X2 direction. In a state where the geared motor 65 is fixed to the support portion 13, the rotation center axis of the output gear 68 extends in the X direction (linear motion direction).

As shown in FIGS. 6 and 7, the rotating body 66 has a circular bottom plate portion 75 and a cylindrical portion 76 extending in the X1 direction from the outer peripheral edge of the bottom plate portion 75. At the center of the bottom plate portion 75, a meshing portion 77 in which the output gear 68 of the geared motor 65 meshes is provided. The meshing portion 77 includes a through hole 77a that penetrates the bottom plate portion 75 in the X direction, and a spline 77b formed on the inner peripheral surface of the through hole 77a. The rotating body 66 covers the geared motor 65 from the X2 direction. As a result, the output gear 68 of the geared motor 65 is brought into a state of being meshed with the meshing portion 77. Therefore, when the geared motor 65 is driven by supplying power to the motor body 67, the rotating body 66 rotates around the axis L when the output gear 68 rotates.

Here, the axis L of the rotating body 66 coincides with the rotation center axis of the output gear 68. Further, the axis L of the rotating body 66 coincides with the center of the support portion 13 of the support body 4. Therefore, the fan fixing shafts 31 to 33 provided on the support 4, the recesses 41 to 43 formed in the end plate portion 11 of the support 4, and the cushioning members 37 to 39 fixed to the recesses 41 to 43 are It is located at equal intervals around the axis L.

At the end of the rotating body 66 in the X2 direction, an annular flange portion 78 that protrudes outward in the radial direction from the end of the cylindrical portion 76 in the X2 direction is provided. When the movable cover 2 is arranged at the second position 2B, the flange portion 78 comes into contact with the movable cover 2 and suppresses cold air from leaking between the drive unit 3 and the movable cover 2. In addition, holes 78a for draining water are formed at two places in the circumferential direction on the inner peripheral edge of the flange portion 78. The hole 78a discharges water adhering to the cylindrical portion 76 due to dew condensation or the like and ice pieces scraped off from the cylindrical portion 76 to prevent the ice pieces from being caught between the flange portion 78 and the movable cover 2.

An engaging portion 80 formed of a spiral convex portion or concave portion is formed on the outer peripheral surface of the cylindrical portion 76 of the rotating body 66. In this example, the engaging portion 80 is composed of two convex portions extending in a spiral shape. The engaging portion 80 extends the outer peripheral surface of the cylindrical portion 76 from the end in the X1 direction to the flange portion 78. The end portion 80a on the side of the flange portion 78 of each engaging portion 80 is located adjacent to the hole 78a of the flange portion 78 in the X1 direction. The end portion 80a is a perforated portion where the movable cover 2 comes into contact with the movable cover 2 when the rotating body 66 rotates counterclockwise CCW and the movable cover 2 is arranged at the second position 2B.

(Movable cover)
The movable cover 2 is made of resin. As shown in FIG. 4, the movable cover 2 includes a cover end plate portion 83 extending in parallel with the end plate portion 11 of the support body 4. When viewed from the X direction, the cover end plate portion 83 has a circular circular end plate portion 84 as a whole and a protruding end plate portion 85 projecting in the Z1 direction from a part of the outer peripheral edge of the circular end plate portion 84 in the circumferential direction. And. The protruding end plate portion 85 projects in the Z1 direction from a position biased in the Y2 direction from the center of the circular end plate portion 84.

Further, the movable cover 2 includes a cover side plate portion 86 extending in the X2 direction from the outer peripheral edge portion of the outer peripheral edge of the cover end plate portion 83 excluding the lower end edge 85a of the protruding end plate portion 85. In the movable cover 2, the portion where the cover side plate portion 86 is not provided is a rectangular notch opening 87 that opens in the Z1 direction. That is, the movable cover 2 includes a rectangular notch opening 87 that opens in the Z1 direction. In the movable cover 2, when the centrifugal fan is arranged at a position facing the opening O on the outside of the cold air flow path, that is, the movable cover 2 is centrifuged at the tip portions of the three fan fixing shafts 31 to 33 of the support 4. When the fans are connected, the shape is such that the centrifugal fan can be accommodated in the space partitioned by the cover end plate portion 83 and the cover side plate portion 86.

The cover side plate portion 86 is provided with a first protruding portion 88 and a second protruding portion 89 projecting to the outer peripheral side. On the other hand, the first protruding portion 88 is provided on the Z1 direction side of the circular end plate portion 84 in the Y1 direction. The other second protruding portion 89 is provided on the portion of the circular end plate portion 84 on the Z2 direction side in the Y2 direction. The first protruding portion 88 and the second protruding portion 89 have a cylindrical shape extending in the X direction along the cover side plate portion 86. Through holes 88a and 89a penetrating in the X direction are formed in the first protruding portion 88 and the second protruding portion 89, respectively.

At the center of the circular end plate portion 84, a rotating body arranging portion 91 for arranging a portion (cylindrical portion 76) in which the engaging portion 80 of the rotating body 66 of the drive unit 3 is formed is provided. As shown in FIG. 4, the rotating body arranging portion 91 includes a disk portion 92 protruding toward the support 4 from the facing surface 83a (cover side facing surface) facing the support 4 in the cover end plate portion 83, and a disk. A rotating body arranging hole 93 that penetrates the portion 92 and the circular end plate portion 84 is provided. On the inner peripheral surface of the rotating body arrangement hole 93, an engaged portion 95 that engages with the engaging portion 80 to form the engaging portion 80 and the feed screw mechanism 94 is formed. The engaged portion 95 is a groove extending in a spiral shape. The engaging portion 80 is in a state of being fitted inside the engaged portion 95. In this example, in forming the groove (engaged portion 95), a part of the inner peripheral surface of the rotating body arrangement hole 93 in the circumferential direction is set as an overhanging portion 96 protruding inward in the radial direction, and the overhanging portion 96 is used. The structure is provided with a groove (engaged portion 95). Here, the engaged portions 95 are formed at two locations in the circumferential direction. Further, the cover end plate portion 83 is provided with an opening 97 on the Y1 direction side of the rotating body arranging portion 91. The tubular portion 23 of the support 4 is inserted into the opening 97.

Further, the cover end plate portion 83 includes three through holes 101 to 103 penetrating in the X direction and two guide holes 104 and 105. The three through holes 101 to 103 are formed inside the cover side plate portion 86. These through holes 101 to 103 are provided at positions surrounding the rotating body arrangement holes 93 at equal angular intervals. In other words, these through holes 101 to 103 are provided at equal angular intervals around the axis L. In the three through holes 101 to 103, three fan fixing shafts 31 to 33 provided at positions surrounding the support portions 13 at equal angle intervals in the support body 4 are inserted from the side in the X1 direction.

As shown in FIG. 2, the two guide holes 104 and 105 together with the two guide shafts 34 and 35 provided on the support 4 form a guide mechanism 30 that guides the movable cover 2 in the X direction. The two guide holes 104 and 105 are through holes 88a and 89a of the first protruding portion 88 and the second protruding portion 89 formed on the outer peripheral side of the cover side plate portion 86. A guide shaft 34 provided in the Z1 direction side portion of the end plate portion 11 of the support 4 on the cover side plate portion 86 side is inserted into the through hole 88a of the first protrusion 88 from the X1 direction side. .. A guide shaft 35 provided in the end plate portion 11 on the side opposite to the cover side plate portion 86 in the Z2 direction is inserted into the through hole 89a of the second protruding portion 89 from the side in the X1 direction.

Further, the cover end plate portion 83 is formed with a cylindrical rib 24 that protrudes in the X2 direction from around the rotating body arrangement hole 93. The tubular rib 24 is formed so as to surround the rotating body arrangement hole 93. The tip (end in the X1 direction) of the tubular rib 24 comes into contact with the flange portion 78 of the drive unit 3 when the movable cover 2 is arranged at the second position 2B, and is between the drive unit 3 and the movable cover 2. Suppress the leakage of cold air from.

Further, as shown in FIG. 4, on the facing surface 83a of the cover end plate portion 83, three circular recesses 107 to 109 (cover side) surrounding the three through holes 101 to 103 located inside the cover side plate portion 86, respectively. (Recess) is provided. Each of the three through holes 101-103 opens in the center of the circular bottom surface of each circular recess 107-109. Further, on the facing surface 83a of the cover end plate portion 83, convex portions 111 to 113 are provided between the three through holes 101 to 103 and the rotating body arranging holes 93, respectively.

Each of the three convex portions 111 to 113 is provided at a position overlapping both the outer peripheral edge of each of the circular recesses 107 to 109 and the opening edge of each of the circular recesses 107 to 109 on the facing surface 83a. Further, each of the three convex portions 111 to 113 is provided on a straight line connecting the axis L and the centers of the three through holes 101 to 103. Each of the convex portions 111 to 113 has a rectangular planar shape when viewed from the X direction, and is provided at a position surrounding the rotating body arrangement holes 93 at equal angular intervals. The longitudinal direction of each of the convex portions 111 to 113 is directed to the circumferential direction of the rotating body arranging hole 93. The tip surfaces 111a to 113a of the convex portions 111 to 113 project from the disk portion 92 in the X1 direction, and are located on the most X1 direction side of the movable cover 2.

Further, each of the convex portions 111 to 113 faces the buffer members 37 to 39 provided on the facing surface 11c of the support body 4. That is, the three recesses 41 to 43 and the three cushioning members 37 to 39 provided on the facing surface 11c of the support 4 overlap each of the three convex portions 111 to 113 when viewed from the X direction. Here, the rotating body arrangement hole 93 is arranged coaxially with the support portion 13 of the support body 4. Further, the axis L of the rotating body 66 passes through the center of the rotating body arranging hole 93 in the X direction. Further, each of the three convex portions 111 to 113 is provided on a straight line connecting the axis L and the centers of the three through holes 101 to 103 formed around the axis L at equal angular intervals. Therefore, each of the convex portions 111 to 113 is located on the outer peripheral side of the support portion 13 of the support 4 when viewed from the X direction (linear motion direction), and surrounds the support portion 13 of the support 4 at equal angular intervals. It is provided at the position.

(wiring)
FIG. 8 is an explanatory diagram of wiring of the wiring 5. The wiring 5 is drawn out from the feeding portion 70 of the motor main body 67 of the drive unit 3 fixed to the support portion 13 into the wiring arrangement groove 18 via the notch 17. At this time, in the wiring arrangement groove 18, the wiring 5 is between the first claw portion 25 and the bottom portion 18a of the wiring arrangement groove 18 and between the second claw portion 26 and the bottom portion 18a of the wiring arrangement groove 18. Is routed to reach the end opening 18b. After that, the wiring 5 is bent from the side end of the side plate portion 12 of the wiring arrangement groove 18 along the side surface 12a of the side plate portion 12 and locked to the wiring locking portion 45.

In the wiring locking portion 45, the wiring 5 is routed between the first locking portion 52 and the side plate portion 12 (side surface 12a) from the side of the end plate portion 11 (end surface 11a), and then the protruding portion 51. It is routed between the second locking portion 53 and the side plate portion 12 (side surface 12a) via the side opposite to the end plate portion 11 (the side in the X2 direction). After that, the wiring 5 is pulled out from the wiring locking portion 45 in the Z2 direction.

The wiring 5 drawn out from the wiring locking portion 45 in the Z2 direction is further drawn out in the Z2 direction along the side surface 12a after passing through the end plate side (X1 direction) of the second retaining portion 56. Then, the end plate side ( X1 direction side ) of the second binding portion 47 is extended and bound to the second binding portion 47 by the binding band 59. That is, the wiring 5 is fixed to the second binding portion 47 by a binding band 59 that is inserted into the groove 60 and wound around the connecting portion 63 between the lower protrusion 61 and the upper protrusion 62.

(Flow path adjustment operation)
FIG. 9 is an explanatory view of a state in which the movable cover 2 is arranged at the first position 2A. When electric power is supplied to the motor body 67 via the wiring 5 to drive the drive unit 3, the rotation of the rotating body 66 is transmitted to the movable cover 2 via the feed screw mechanism 94. Here, the guide mechanism 30 that guides the movable cover 2 in the X direction (linear motion direction) prevents the movable cover 2 from rotating together with the rotating body 66. Therefore, when the rotating body 66 rotates, the movable cover 2 moves in the X1 direction and the X2 direction along the axis L.

As shown in FIG. 2, when the rotating body 66 rotates clockwise around the axis L in the direction of CW, the movable cover 2 moves in the X1 direction in the axis L direction. As a result, the movable cover 2 is arranged at the first position 2A separated from the opening O. When the movable cover 2 is arranged at the first position 2A, the opening O is opened. Therefore, as shown by the arrow C in FIG. 2, the cold air is supplied into the refrigerator from between the cold air flow path and the damper device 1.

On the other hand, as shown in FIG. 3, when the rotating body 66 rotates counterclockwise in the CCW direction around the axis L, the movable cover 2 moves in the X2 direction in the axis L direction. As a result, the movable cover 2 is arranged at the second position 2B close to the opening O. In the state where the movable cover 2 is arranged at the second position 2B, the cover end plate portion 83 of the movable cover 2 is directed to the flange portion 78 formed on the rotating body 66 of the drive unit 3 via the cylindrical rib 24 in the X1 direction. Approach from the side of. As a result, it is possible to prevent cold air from leaking between the drive unit 3 and the movable cover 2. Further, in the state where the movable cover 2 is arranged at the second position 2B, the movable cover 2 partially covers the opening edge of the opening O of the cold air flow path. Therefore, the cold air supplied from the opening O of the cold air flow path is supplied into the refrigerator through the notch opening 87 of the movable cover 2 as shown by the arrow D in FIG. Therefore, when the movable cover 2 is arranged at the second position 2B, a smaller flow rate of cold air is supplied to the refrigerator as compared with the case where the movable cover 2 is located at the first position 2A.

The damper device 1 may arrange the movable cover 2 at an intermediate position between the first position 2A and the second position 2B to adjust the flow rate of cold air passing through the opening O.

Here, when the movable cover 2 is arranged at the first position 2A, as shown in FIG. 9, the convex portions 111 to 113 provided on the movable cover 2 and the cushioning members 37 to 39 provided on the support 4 are provided. Contact. Further, the cushioning members 37 to 39 are in a state of being elastically deformed in contact with the convex portions 111 to 113 when the movable cover 2 is arranged at the first position 2A. Therefore, no collision noise is generated when the movable cover 2 is arranged at the first position 2A.

Further, as in this example, when the damper device 1 is arranged in a low temperature environment such as in a refrigerator, the members in contact with each other may freeze due to dew condensation or the like and may not be separated from each other. .. On the other hand, the cushioning members 37 to 39 are elastically deformed by the protrusions 111 to 113 when the movable cover 2 is arranged at the first position 2A. Therefore, dew condensation can be easily eliminated from between the convex portions 111 to 113 and the cushioning members 37 to 39, and it is possible to prevent or suppress the convex portions 111 to 113 and the cushioning members 37 to 39 from freezing and not being separated from each other.

Further, since the portions that come into contact with the cushioning members 37 to 39 are the convex portions 111 to 113, the cushioning members 37 to 37 are compared with the case where the movable cover 2 is brought into contact with the cushioning members without providing the convex portions 111 to 113. 39 can be made smaller.

Further, in this example, as shown in FIG. 9, when viewed from the X direction (when viewed from the linear motion direction), the tip surfaces 111a to 113a of the convex portions 111 to 113 are the cushioning members 37 to 39. Smaller than Further, when viewed from the X direction (when viewed from the linear motion direction), the tip surface 111a of the convex portion 111 is located inside the contour of the cushioning member 37. The tip surface 112a of the convex portion 112 is located inside the contour of the cushioning member 38. The tip surface 113a of the convex portion 113 is located inside the contour of the cushioning member 39. Therefore, when the movable cover 2 is arranged at the first position 2A, it is easy to bring the convex portions 111 to 113 of the movable cover 2 into contact with the cushioning members 37 to 39 provided on the support 4. Further, when the movable cover 2 is arranged at the first position 2A, it is possible to prevent the convex portions 111 to 113 of the movable cover 2 from colliding with the portion of the support 4 that is not covered by the cushioning members 37 to 39. ..

Further, since the tips of the convex portions 111 to 113 of the movable cover 2 are located closest to the support 4 in the movable cover 2, when the movable cover 2 is arranged in the first position 2A, the convex portion in the movable cover 2 It is possible to prevent the parts other than 111 to 113 from colliding with the support 4.

When the cushioning members 37 to 39 are elastically deformed by the contact of the convex portions 111 to 113, the cushioning members 37 to 39 are crushed in the X1 direction. Therefore, the tips of the convex portions 111 to 113 are on the X1 direction side (support) from the position of the end face on the X1 direction side (end face on the movable cover 2 side) of the cushioning members 37 to 39 in the state before elastic deformation. It is in a state of reaching the end plate portion 11 side of the body 4. Further, when the movable cover 2 moves from the first position 2A to the side of the second position 2B, the cushioning members 37 to 39 return to their original shapes due to the restoring force thereof.

Here, the support 4 includes a facing surface 11c facing the movable cover 2 in the X direction (linear motion direction), and the facing surface 11c is positioned so as to overlap the convex portions 111 to 113 when viewed from the X direction. The recesses 41 to 43 are provided. The buffer members 37 to 39 are arranged in the recesses 41 to 43. Therefore, it is easy to arrange the buffer members 37 to 39 on the facing surface 11c of the support 4 with the recesses 41 to 43 as marks.

Further, the movable cover 2 includes three convex portions 111 to 113 arranged so as to surround the support portion 13 of the support 4 when viewed from the X direction (linear movement direction) as the convex portions 111 to 113. The support 4 includes three cushioning members 37 to 39 facing each of the convex portions 111 to 113 as cushioning members 37 to 39. Therefore, when the movable cover 2 is arranged at the first position 2A, the posture of the movable cover 2 is stable. Therefore, when the movable cover 2 is arranged at the first position 2A, it is possible to prevent the movable cover 2 from colliding with the support 4 except for the convex portions 111 to 113.

Further, the convex portions 111 to 113 provided on the movable cover 2 have a shape long in the circumferential direction of the support portion 13 when viewed from the X direction (linear motion direction), and the cushioning members 37 to 39 have a shape. When viewed from the X direction (linear motion direction), the shape is long in the circumferential direction of the support portion 13. Therefore, when the movable cover 2 is arranged at the first position 2A and the convex portions 111 to 113 and the cushioning members 37 to 39 come into contact with each other, the movable cover 2 is on the outer peripheral side of the support portion 13 (of the drive unit 3). It is possible to prevent or avoid an inclined posture on the outer peripheral side).

Further, the three convex portions 111 to 113 provided on the movable cover 2 are provided at positions that surround the support portion 13 (drive unit 3) at equal angular intervals when viewed from the X direction. Therefore, when the movable cover 2 is arranged at the first position 2A, the posture of the movable cover 2 is stable. Therefore, when the movable cover 2 is arranged at the first position 2A, it is possible to prevent the movable cover 2 from colliding with the support 4 except for the convex portions 111 to 113.

Further, the convex portions 111 to 113 and the cushioning members 37 to 39 are located between the guide mechanism 30 and the support portion 13 when viewed from the X direction. Therefore, when the movable cover 2 is arranged at the first position 2A, the convex portions 111 to 113 provided on the movable cover 2 and the cushioning members 37 to 39 provided on the support 4 are likely to come into contact with each other.

Further, in this example, the convex portions 111 to 113 and the cushioning members 37 to are located closer to the drive unit 3 than the fan fixing shafts 31 to 33 in the radial direction centered on the axis L of the rotating body 66 of the drive unit 3. 39 and are arranged. Therefore, the cushioning members 37 to 38 provided on the support 4 on which the drive unit 3 is supported are brought into contact with the convex portions 111 to 113 provided on the movable cover 2 with which the rotating body 66 of the drive unit 3 is engaged. Is easy.

(Modification example)
The convex portions 111 to 113 may be provided on the support 4, and the cushioning members 37 to 39 may be provided on the movable cover 2.

Further, as the guide mechanism 30, the guide shafts 34 and 35 may be provided on the side of the movable cover 2 and the guide holes 104 and 105 may be formed on the side of the support body 4.

Further, a spiral recess is provided as an engaging portion 80 on the outer peripheral surface of the cylindrical portion 76 of the rotating body 66 of the drive unit 3, and the engaging portion 80 is formed on the inner peripheral surface of the rotating body arrangement hole 93 of the movable cover 2. A convex portion that engages with the engaging portion 80 to form a feed screw mechanism 94 may be provided.

Further, in the above example, the cover side plate portion 86 of the movable cover 2 is provided with the notch opening 87, but the cover side plate portion 86 is the cover end plate portion 83 without providing such the notch opening 87. It may extend in the X2 direction from the entire circumference of the outer peripheral edge. In this case, when the movable cover 2 is arranged at the second position 2B, the movable cover 2 can cover the opening O. Therefore, when the movable cover 2 is arranged at the second position 2B, the flow rate of cold air passing through the opening O (first flow rate) can be set to zero.

Further, in the above example, the wiring 5 is pulled out upward from the damper device 1, but the wiring 5 may be pulled out downward from the damper device 1. In this case, the wiring 5 drawn out to the side of the side plate portion 12 through the wiring arrangement groove 18 is routed between the second locking portion 53 and the side plate portion 12 (side surface 12a) in the wiring locking portion 45. After that, the protrusion portion 51 is routed between the first locking portion 52 and the side plate portion 12 (side surface 12a) via the side opposite to the end plate portion 11 (the side in the X2 direction). After that, the wiring 5 may be pulled out from the wiring locking portion 45 in the Z1 direction, passed through the end plate side (X1 direction) of the first retaining portion 54, and bound to the first binding portion 46 by the binding band 59.

In the above example, this example is applied to the damper device 1 attached to the fluid passage through which cold air (fluid) flows, but it is applied to the damper device 1 provided in the fluid passage through which various fluids (liquid or gas) other than cold air flow. This example may be applied.

1 ... Damper device, 1A ... Damper device installation posture, 2 ... Movable cover, 2A ... Movable cover 1st position, 2B ... Movable cover 2nd position, 3 ... Drive unit, 4 ... Support, 5 ... Wiring, 11 ... end plate part, 11a ... end face, 11b ... through hole, 11c ... facing surface, 12 ... side plate part, 12a ... side surface, 13 ... support part, 15 ... first cylinder part, 15a ... center hole, 16 ... second Cylinder part, 16a ... Center hole, 18 ... Wiring arrangement groove, 18a ... Bottom part, 18b ... End opening, 19 ... Inner peripheral side groove part, 19a ... Lower side wall surface part, 19b ... Upper wall surface part, 20 ... Inclined groove part, 21 ... Outer peripheral groove portion, 21a ... Lower side wall surface portion, 21b ... Upper wall surface portion, 22 ... Opening, 23 ... Cylindrical portion, 24 ... Cylindrical rib, 25 ... 1st claw portion, 26 ... 2nd claw portion, 27 ... 1 protrusion, 28 ... 2nd protrusion, 30 ... Guide mechanism, 31-33 ... Fan fixing shaft, 34/35 ... Guide shaft, 37-39 ... Buffer member, 41-43 ... Recess, 45 ... Wiring locking Part, 46 ... 1st binding part, 47 ... 2nd binding part, 51 ... Protruding part, 52 ... 1st locking part, 53 ... 2nd locking part, 54 ... 1st retaining part, 55 ... 1st inclination Part, 56 ... 2nd retaining part, 57 ... 2nd inclined part, 59 ... Bundling band, 60 ... Groove, 61 ... Lower protrusion, 62 ... Upper protrusion, 63 ... Connecting part, 65 ... Geared motor, 66 ... rotating body, 67 ... motor body, 68 ... output gear, 69 ... reduction wheel train, 70 ... power feeding part, 71 ... end plate member, 72 ... case, 72a ... opening, 74 ... screw, 75 ... bottom plate part, 76 ... Cylindrical part, 77b ... Spline, 77 ... Mating part, 77a ... Through hole, 78 ... Flange part, 78a ... Hole, 80 ... Engaging part, 80a ... End part, 83 ... Cover end plate part, 83a ... Facing surface, 84 ... circular end plate portion, 85 ... protruding end plate portion, 85a ... lower end edge, 86 ... cover side plate portion, 87 ... notched opening, 88 ... first protruding portion, 88a ... through hole, 89 ... second protruding portion, 89a ... through hole, 91 ... rotating body arranging part, 92 ... disk part, 93 ... rotating body arranging hole, 94 ... feed screw mechanism, 95 ... engaged part, 96 ... overhanging part, 101-103 ... through hole, 104/105 ... Guide holes, 107-109 ... Circular concaves (concave on the cover side), 111-113 ... Convex parts, 111a-113a ... Tip surfaces of each convex part, CW ... Clockwise, CCW ... Counterclockwise, L ... Axis, O ... Opening

Claims (12)

A movable cover for adjusting the flow rate of gas passing through the opening,
The movable cover has a first position where the flow rate is the first flow rate and a second position where the flow rate is closer to the opening than the first position and the flow rate is smaller than the first flow rate. The drive unit that moves directly between, and
A support having a support portion for supporting the drive unit, and
One of the support and the movable cover includes a convex portion that projects toward the other of the support and the movable cover in the linear motion direction of the movable cover.
The other of the support and the movable cover is provided with a cushioning member at a position facing the convex portion in the linear motion direction.
The damper device is a damper device characterized in that when the movable cover is arranged at the first position, the convex portion abuts and is elastically deformed. The damper device according to claim 1, wherein the tip of the convex portion is smaller than the cushioning member and is located inside the contour of the cushioning member when viewed from the linear motion direction. The damper device according to claim 1 or 2, wherein the tip of the convex portion is located most on the other side of the support and the movable cover in one of the support and the movable cover. The other of the support and the movable cover comprises a facing surface facing one of the support and the movable cover in the linear motion direction.
The facing surface is provided with a concave portion at a position overlapping the convex portion when viewed from the linear motion direction.
The damper device according to any one of claims 1 to 3, wherein the cushioning member is arranged in the recess. The damper device according to any one of claims 1 to 4, wherein the cushioning member is a porous member. One of the support and the movable cover includes, as the convex portion, three or more of the convex portions arranged so as to surround the support portion when viewed from the linear motion direction.
The support and the other of the movable cover include, as the cushioning member, a plurality of the cushioning members facing each of the plurality of convex portions in the linear motion direction. The damper device according to any one of the items. The plurality of convex portions have a shape long in the circumferential direction of the support portion when viewed from the linear motion direction.
The damper device according to claim 6, wherein the plurality of shock absorbers have a shape long in the circumferential direction of the support portion when viewed from the linear motion direction. The damper device according to claim 6 or 7, wherein the plurality of convex portions are provided at positions surrounding the support portions at equal angular intervals when viewed from the linear motion direction. The convex portion is provided on the movable cover, and the convex portion is provided on the movable cover.
The damper device according to any one of claims 1 to 8, wherein the cushioning member is provided on the support. The drive unit includes a drive source and a rotating body driven by the drive source and rotating around an axis extending in the linear motion direction.
The rotating body has an engaging portion formed of a spiral convex portion or concave portion on an outer peripheral surface thereof.
The movable cover engages with the rotating body arrangement hole in which the portion of the rotating body on which the engaging portion is formed is arranged, and the engaging portion on the inner peripheral surface of the rotating body arrangement hole. The damper device according to any one of claims 1 to 9, further comprising the engaging portion and the engaged portion constituting the feed screw mechanism. A guide mechanism for guiding the movable cover is provided.
In the guide mechanism, the guide shaft extending in the linear motion direction in one of the support and the movable cover and the guide shaft are inserted and fitted in the other of the support and the movable cover. With guide holes,
The damper device according to claim 10, wherein the convex portion and the cushioning member are located between the guide mechanism and the support portion when viewed from the linear motion direction. The drive unit includes a drive source and a rotating body driven by the drive source and rotating around an axis extending in the linear motion direction.
The rotating body has an engaging portion formed of a spiral convex portion or concave portion on an outer peripheral surface thereof.
The support includes a fan fixing shaft that projects the linear motion direction from the outer peripheral side of the support portion toward the movable cover side and allows the fan to be fixed to the tip.
The movable cover includes a cover end plate portion having a cover-side facing surface facing the support in the linear motion direction.
The cover end plate portion engages with the rotating body arranging hole in which the portion of the rotating body on which the engaging portion is formed is arranged, and the engaging portion on the inner peripheral surface of the rotating body arranging hole. The engaging portion, the engaged portion constituting the feed screw mechanism, and the through hole through which the fan fixing shaft penetrates on the outer peripheral side of the rotating body arrangement hole are provided.
The cover-side facing surface is provided with a cover-side recess through which the through hole opens to the bottom surface.
The convex portion is provided at a position overlapping both the outer peripheral edge of the cover-side concave portion and the opening edge of the cover-side concave portion on the facing surface, and is provided on a straight line connecting the axis and the center of the through hole. And
The damper device according to claim 1, wherein the cushioning member is provided between the support portion and the fan fixing shaft in the support.

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