JP7133710B2 - damper device - Google Patents

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a damper device used for braking, for example, opening and closing operations of a glove box of an automobile.

For example, a damper device is sometimes used in a glove compartment of an automobile to prevent the lid from opening suddenly and allow the lid to open gently.

As such a damper device, the following Patent Document 1 discloses a substantially rectangular frame-shaped support, a rotary damper body rotatably supported in the support, and a slidable damper disposed in the support. A damper device is described which consists of a rack body which meshes with a pinion portion of a rotary damper body.

Patent Document 2 below describes a damper assembly that includes a base having a rack gear, a carriage that can move relative to the base, and a damper that engages with the rack gear. The carriage comprises a plate-shaped main body, a circular container-shaped well section connected to the main body and rotatably accommodating a damper, and a pair of followers erected from both sides of the main body. The base portion is composed of a long plate-like base plate and a pair of tracks extending vertically from both long sides of the base plate. Then, after the damper is axially pushed in through the opening between the pair of followers of the truck and accommodated in the well, the base is pushed into the truck to insert the pair of tracks between the pair of followers. A pair of tracks are sandwiched by a pair of followers, and a carriage is attached to the base.

Japanese Patent No. 5836281 Japanese Patent Publication No. 2009-516132

In the damper device of Patent Document 1, the rotary damper body and the rack body are inserted and arranged in the substantially square frame-shaped support body, and the support body has a shape that covers the rotary damper body and the rack body. Prone.

On the other hand, in the damper assembly of Patent Document 2, the damper is axially pushed through the opening of the truck and the base is pushed into the truck to insert a pair of tracks between a pair of followers. Because of the configuration, the size of the opening of the truck (the distance between the pair of followers) needs to be larger than the outer diameter of the damper, and the base (rack body) tends to be wide.

SUMMARY OF THE INVENTION Accordingly, it is an object of the present invention to provide a damper device capable of narrowing the width of the rack body and reducing the thickness of the device.

In order to achieve the above object, the present invention provides a damper device that is attached between a pair of members that are close to each other and separates from each other, and that applies a braking force when the pair of members come close to or separate from each other, the damper device comprising: A fixed case, a rack body connected to the other member and slidably supported by the case, and a rotary damper housed in the case and applying a braking force when the rack body slides. The rack body includes a substrate extending for a predetermined length, a pair of first side walls erected from opposite portions of the substrate, and a pair of guides protruding from the outer surface of each first side wall. It has a rail and a rack gear formed on the inner surface of one of the first side walls, and the rotary damper is arranged between the pair of first side walls and has a pinion gear meshing with the rack gear. The case includes a support wall that rotatably supports the rotary damper, a pair of second side walls that stand from opposing portions of the support wall, and an inner side from the tip side of the pair of second side walls. and a pair of retaining portions that extend toward the guide rail and overlap the guide rails to retain the rack body. The minimum distance between the surfaces is formed to be smaller than the maximum outer diameter of the rotary damper, and the substrate and/or the first side wall partially enters the area formed between the opposing surfaces. It is characterized by:

According to the present invention, since the minimum distance between the opposing surfaces of the pair of retaining portions is formed to be smaller than the maximum outer diameter of the rotary damper, the minimum distance between the opposing surfaces of the pair of retaining portions is minimized. It is possible to reduce the width of the substrate of the rack body, thereby narrowing the width of the damper device. In addition, since part of the substrate and/or the first side wall of the rack body enters the area formed between the opposed surfaces of the pair of retaining portions, the rack body is arranged in the thickness direction of the pair of retaining portions. The damper device can be made thinner by that amount.

1 is an exploded perspective view showing an embodiment of a damper device according to the present invention; FIG. It is a perspective view of the same damper apparatus in an assembly|attachment state. It is an exploded perspective view of a rotary damper in the same damper device. It is the perspective view which looked at the rack body of the same damper apparatus from the inner surface side. It is an expansion perspective view of the case of the same damper apparatus. It is a top view of the case of the same damper apparatus. It is a side view of the case of the damper device. Fig. 3 shows the sliding motion of the rack body of the same damper device, where (a) is an illustration of the state in which the rack body is pushed into the case, and (b) is an illustration of the state in which the rack body is pulled out of the case. It is a diagram. FIG. 8(a) is a cross-sectional view taken along the line of arrows GG in FIG. 8(a). FIG. 8(a) is a cross-sectional view taken along line HH in FIG. 8(a). It is explanatory drawing which shows the state at the time of applying a braking force of the same damper apparatus. It is explanatory drawing which shows the state at the time of braking force release of the same damper apparatus.

An embodiment of a damper device according to the present invention will be described below with reference to the drawings.

A damper device 100 shown in FIG. 1 is attached to a pair of members that are close to each other and separates from each other, and applies a braking force when the pair of members come close to or separate from each other. It can be used for braking a glove box, a lid, or the like, which is openable and closable in the opening of the housing provided. In the following embodiments, one member is a fixed body such as an instrument panel accommodating portion, and the other member is a glove box, a lid, or the like attached to an opening of the fixed body so as to be openable and closable. Although described as an opening/closing body, the pair of members is not particularly limited as long as it can be moved toward and away from each other.

As shown in FIGS. 1 and 2, the damper device 100 of this embodiment includes a case 130 fixed to one member and a rack body connected to the other member and slidably supported by the case 130. 160, a rotary damper 110 that is housed in the case 130, applies a braking force when the rack body 160 slides in one direction, and releases the braking force when the rack body 160 slides in a direction opposite to the one direction; and a planetary gear 150 housed in the case 130 .

3, 9, and 10, the rotary damper 110 includes a rotor 111 and a gear housing 115 that surrounds the rotor 111 with a viscous fluid and applies a braking force to the rotation of the rotor 111. have. The gear housing 115 includes a large-diameter gear 116 having a recess 117 inside which accommodates the rotor 111 and having a gear formed on its outer periphery, and a cap 118 sealing the opening of the recess 117 of the large-diameter gear 116 . have. A shaft insertion hole 119 through which the shaft portion 112 provided on the rotor 111 is inserted is formed in the central portion of the cap 118 . Further, as shown in FIG. 10, an arcuate rib 132 provided on a support wall 131 of a case 130, which will be described later, is fitted to the lower surface of the large-diameter gear 116 to rotatably support the rotary damper 110. An annular groove 123 is formed.

The rotor 111 is disk-shaped as a whole, and has a shaft portion 112 projecting from the center portion of one side thereof. 115 protruding outside. As shown in FIG. 9, the tip of the shaft portion 112 is provided with a hemispherical projection 112a that can be in point contact with the rear surface of a substrate 161 of the rack body 160, which will be described later. Further, as shown in FIG. 3, the pinion gear 120 has a gear portion 121 on its outer periphery and a shaft hole 122 formed in its center. The portion 112 and the pinion gear 120 rotate integrally.

Therefore, when the pinion gear 120 rotates while the rotation of the large-diameter gear 116 is restricted, the rotor 111 rotates relative to the gear housing 115 via the shaft portion 112. braking force is applied. Further, as shown in FIG. 8, the pinion gear 120 is arranged between a pair of first side walls 163, 163 (see FIG. 9) of the rack body 160, and as shown in FIG. It meshes with a rack gear 167 formed on the inner surface of one side wall 163 . In this embodiment, the protrusion 112a is provided at the tip of the shaft portion 112. However, for example, a protrusion may be provided from the center of the surface of the pinion gear 120, and the protrusion may be brought into point contact with the rear surface of the substrate of the rack body 160. It may be made possible.

Next, the rack body 160 will be described. As shown in FIGS. 4 and 8, the rack body 160 includes a board 161 extending in a long plate shape with a predetermined length and a pair of first side walls 163, 163 ( Here, a pair of first side walls 163, 163 are provided on both sides of the substrate 161 along the longitudinal direction of the substrate 161), and the outer surface of each first side wall 163 protrudes from a position below the surface of the substrate 161. It has a pair of guide rails 165 , 165 and a rack gear 167 formed on the inner surface of one first side wall 163 .

As shown in FIG. 4, the rack gear 167 is formed along the longitudinal direction of the first side wall 163 on the inner surface side of one of the first side walls 163, and is a pinion gear mounted on the shaft portion 112 of the rotary damper 110. It is designed to mesh with 120. Therefore, when the rack body 160 slides with respect to the case 130 , the pinion gear 120 meshing with the rack gear 167 rotates, and the rotor 111 rotates via the shaft portion 112 .

2 and 9, tapered surfaces 169, 169 are formed at the connecting portions of the pair of guide rails 165, 165 with the pair of first side walls 163, 163, respectively. Each tapered surface 169 is on the outer surface side of each guide rail 165 (the surface side of the case 130 facing the retainer portion 135 described later) and is directed from the outer edge portion side of each guide rail 165 toward the first side wall 163 side. 9), and is formed over the entire longitudinal direction of the guide rail 165 (see FIG. 2).

Further, a pair of brackets 171 extend parallel to one end of the rack body 160, and each bracket 171 is formed with a mounting hole 171a. For example, a mounting shaft protruding from the side wall of the glove box is inserted into the mounting hole 171a so that one end of the rack body 160 is attached to a component such as the glove box to which a braking force is to be applied.

Furthermore, a stopper portion 173 is protruded from a portion of the rack body 160 near one longitudinal end of the pair of guide rails 165 , 165 . These stopper portions 173, 173 are provided on a pair of second side walls 133, 133, which will be described later, of the case 130 when the rack body 160 is pulled out from the case 130, as shown in FIG. 8(b). Further withdrawal of the rack body 160 is restricted by abutting on the stopper engaging portions 134, 134 (see FIGS. 5 and 7).

Next, case 130 will be described. As shown in FIGS. 5 to 7, the case 130 of this embodiment includes a support wall 131 that rotatably supports the rotary damper 110, and a pair of second support walls 131 erected from opposing portions of the support wall 131. The side walls 133, 133 and the pair of second side walls 133, 133 extend inward from the leading end side, overlap the pair of guide rails 165, 165 of the rack body 160, and extend the rack body 160. It has a pair of retaining portions 135 , 135 for retaining and a guide rail support wall 137 supporting a pair of guide rails 165 , 165 between the pair of retaining portions 135 , 135 .

More specifically, as shown in FIG. 6, the support wall 131 has a substantially circular shape corresponding to the shape of the rotary damper 110 . A pair of arc-shaped ribs 132, 132 are formed on the inner surface side of the support wall 131 (the support surface side of the rotary damper 110). 10, these arc-shaped ribs 132, 132 are fitted into an annular groove 123 formed in the bottom surface of the large-diameter gear 116 of the rotary damper 110, thereby making the large-diameter gear 116 rotatable. It has come to support.

The pair of second side walls 133 , 133 are arranged to face each other from both sides of the support wall 131 in the width direction. As shown in FIG. 5, the pair of second side walls 133, 133 are erected in an arcuate shape, and have arcuate walls 133a, 133a separated from each other at one ends, and from the other end of the arcuate wall 133a. It is composed of extending wall portions 133b, 133b extending in parallel.

One end sides of the pair of second side walls 133, 133, that is, one end sides of the arc-shaped wall portions 133a, 133a are spaced apart from each other as described above, and the rotary damper 110 is placed between them on the side of the case 130. An opening 139 is provided to enable insertion from a direction (a direction perpendicular to the axial direction of the rotary damper 110). In relation to the opening 139, the supporting wall 131 has a height that gradually protrudes toward the inner side of the insertion direction of the rotary damper 110 with respect to the case 130, as shown in FIG. A guide surface 131a is provided which is inclined so as to increase the height. This guide surface 131 a contributes to the improvement of workability of inserting the rotary damper 110 into the case 130 .

The guide rail support wall 137 is arranged on the other end side of the pair of second side walls 133 , 133 so as to face the opening 139 . That is, as shown in FIGS. 5 and 6, a guide rail support wall 137 is arranged on the other end side of the extension wall portions 133b, 133b constituting the pair of second side walls 133, 133, and this A guide rail support wall 137 connects the extension wall portions 133b, 133b to each other. Further, as shown in FIG. 6, the guide rail support wall 137 is arranged away from the outer circumference of the rotary damper 110 when the case 130 is viewed from the axial direction of the rotary damper 110 .

Furthermore, as shown in FIG. 7, the guide rail support wall 137 has a length that does not reach the tip of the second side wall 133 in the erecting direction (the position where the retainer 135 is provided) from the inner surface side of the support wall 131. It is erected (here, it is erected at a height capable of covering the gear housing 115 of the rotary damper 110). As a result, as shown in FIG. 7, the rack body 160 can be inserted from the lateral direction of the case 130 between the upper end surface of the guide rail support wall 137 and the lower surface (inner surface) of the pair of retaining portions 135 and 135. A rack insertion opening 141 is formed as follows.

5 to 7, a pair of support protrusions 137a, 137a are provided on the upper end surface of the guide rail support wall 137 so that the pair of guide rails 165, 165 of the rack body 160 slide. It can be supported (see FIGS. 8 and 9). In this state, the back surface of the substrate 161 of the rack body 160 is supported by the protrusion 112a at the tip of the shaft portion 112 of the rotary damper 110, and the rack body 160 is supported by the protrusion 112a and the pair of support protrusions 137a, 137a. , and is supported at three points. Although there is a clearance between the support protrusion 137a and the guide rail 165 in FIG. 9, this is for the sake of convenience.

Further, as shown in FIG. 7 , a pair of stopper portions 173 , 173 provided on the rack body 160 abut on the inner surface side of the pair of second side walls 133 , 133 at a position aligned with the rack insertion opening 141 . Further, stopper engagement portions 134, 134 are provided to regulate the amount by which the rack body 160 is pulled out from the case 130. As shown in FIG.

As shown in FIG. 6, an engaging portion 142 protrudes from the inner surface of the guide rail support wall 137 at the center in the width direction. Receptacles 140,140 are defined between the second side walls 133,133. Further, as shown in FIGS. 11 and 12 , a planetary gear 150 that meshes with the large-diameter gear 116 of the rotary damper 110 is rotatably accommodated in one accommodating portion 140 . The rotation of the planetary gear 150 is restricted by engaging with the corner of the engaging portion 142 to restrict the rotation of the large-diameter gear 116 (see FIG. 11) and move away from the corner of the engaging portion 142. This allows the large diameter gear 116 to rotate (see FIG. 12).

As shown in FIG. 6, the pair of retaining portions 135, 135 extend from the facing surfaces of the leading ends of the pair of second side walls 133, 133 in the erecting direction so as to approach each other. , and the facing surfaces 135a, 135a located at the tips in the extending direction thereof are extended so as to be parallel to each other.

In the damper device 100, as shown in FIG. 9, the minimum distance L between the facing surfaces 135a, 135a of the pair of retaining portions 135, 135 located at the leading ends in the extending direction (here, the minimum distance L (hereinafter referred to as an elastic The distance between the protrusions 145a, 145a provided on the contact portions 145, 145) is smaller than the maximum outer diameter R of the rotary damper 110 (here, the outer diameter of the large-diameter gear 116). , 135a (see FIG. 7), the substrate 161 and/or the first side wall 163 of the rack body 160 is configured to partially enter. As shown in FIG. 9, in this embodiment, the base end sides of the pair of first side walls 163, 163 are inserted into the region E between the opposing surfaces 135a, 135a of the pair of retaining portions 135, 135. It is configured. However, the substrate 161 alone may be inserted between the pair of retaining portions 135, 135, or both the substrate 161 and part of the retaining portion 135 may be disposed.

Further, as shown in FIGS. 6 to 10, the opposing surfaces 135a, 135a of the pair of retaining portions 135, 135 have the substrate 161 of the rack body 160 and/or the first substrate 161 in the region E (see FIG. 7). An elastic contact portion 145 is provided that elastically contacts the tapered surface 169 of the rack body 160 when at least a portion of the side wall 163 enters. As shown in FIG. 6, in this embodiment, each retaining portion 135 is directed toward one end side of the second side wall 133 from a portion near the other end of the second side wall 133 (portion near the guide rail support wall 137). A slit 144 having a predetermined length is formed through the slit 144, and an elastic contact portion 145 that is flexibly deformable is provided. Moreover, a protrusion 145a projects from the outer surface side (opposing surface 135a side) of the elastic contact portion 145 provided on one retainer portion 135 toward the other retainer portion 135 . The structure for imparting elasticity to the elastic portion is not particularly limited, and may be, for example, thinning the retaining portion instead of forming a slit in the retaining portion.

Rotating damper 110 is rotatably accommodated in case 130, and substrate 161 of rack body 160 and/or first damper 161 and/or first damper 161 are placed in region E between opposed surfaces 135a of paired retaining portions 135, 135. When the side wall 163 is partially inserted and the rack body 160 is slidably attached to the case 130, as shown in FIG. , 145a abut on tapered surfaces 169, 169 formed on the pair of guide rails 165, 165, respectively.

Further, as shown in FIG. 9, the outer surface (lower surface) of the support wall 131 is provided with a hook 147 for attachment to a member that exerts a damper action. For example, when applied to a glove box, the hook 147 is attached to the side wall of the main body provided on the vehicle body side, and the bracket 171 of the rack body 160 is attached to the main body so as to be openable and closable. It is adapted to be connected to the side wall of the box.

The shapes and structures of the case, rack body, rotary damper, etc. described above are merely examples, and the structures are not limited to those described above.

Next, the effects of the damper device 100 configured as described above will be described.

For example, the damper device 100 can be assembled as follows. First, as indicated by an arrow K1 in FIG. 1, the planetary gear 150 is placed in one accommodating portion 143 from the upper opening of the case 130. As shown in FIG. Next, as indicated by an arrow K2 in FIG. 1, the rotary damper 110 is inserted from the lateral direction of the case 130 through the opening 139 at one end of the pair of second side walls 133, 133, and is attached to the inner surface of the support wall 131. By inserting the pair of arc-shaped ribs 132, 132 into the annular groove 123 on the lower surface of the large-diameter gear 116, the rotary damper 110 is rotationally supported in the case 130 so as not to shift laterally.

Next, as indicated by the arrow K3 in FIG. 1, the rack body 160 is inserted through the rack insertion opening 141 (see FIG. 7) formed between the guide rail support wall 137 and the pair of retaining portions 135, 135. It is inserted from the lateral direction of the case 130 (that is, the direction K1 of inserting the rotary damper 110 into the case 130 and the direction K2 of inserting the rotary damper 110 into the case 130 are opposite to each other). Then, while the pair of guide rails 165, 165 are supported by the pair of support protrusions 137a, 137a provided on the upper end surface of the guide rail support wall 137, the rack body 160 is pushed in, and the pair of first side walls 163 are pushed. , 163, the base ends of the pair of first side walls 163, 163 enter between the pair of retaining portions 135, 135 while the pinion gear 120 of the rotary damper 110 is inserted between them. At the same time, the projecting portions 145a, 145a of the elastic contact portions 145, 145 are pressed against the tapered surfaces 169, 169 of the pair of guide rails 165, 165, and the elastic contact portions 145, 145 are flexibly deformed. When the pair of stopper portions 173, 173 provided on the rack body 160 get over the pair of stopper engaging portions 134, 134 (see FIG. 7) on the case 130 side, the stopper portion 173 and the stopper engaging portion 134 Locking becomes possible, and the rack body 160 is slidably attached so as not to come off from the case 130 . In this manner, the damper device 100 made up of the constituent members can be assembled. However, for example, after the rotary damper 110 is rotatably arranged in the case 130, the planetary gear 150 may be mounted, and then the rack body 160 may be assembled so as to be slidable (K2 in FIG. 1, order of K1 and K3), and the assembly procedure is not particularly limited.

In this damper device 100, as shown in FIG. 145a, 145a) is smaller than the maximum outer diameter R of the rotary damper 110 (here, the outer diameter of the large-diameter gear 116). 7), the substrate 161 of the rack body 160 and/or a part of the first side wall 163 (here, the base ends of the pair of first side walls 163, 163 are inserted). .

Therefore, the minimum distance L between the facing surfaces 135a, 135a of the pair of retainer portions 135, 135 can be minimized, and the width of the substrate 161 of the rack body 160 can be reduced. can be narrowed. In addition, since a part of the substrate 161 and/or the first side wall 163 of the rack body 160 is configured to enter the region E as shown in FIG. The rack body 160 overlaps (laps) in the direction, and the thickness of the damper device 100 can be reduced accordingly.

In this embodiment, as shown in FIG. 5, the case 130 is provided with a guide rail support wall 137 for supporting the guide rail 165 between the case 130 and the retaining portion 135. As shown in FIG. 6 , wall 137 is spaced apart from the outer periphery of rotary damper 110 when case 130 is viewed from the axial direction of rotary damper 110 . Therefore, the space in the case 130 can be effectively used to house the rotary damper 110 while providing the guide rail support wall 137, thereby effectively reducing the width and thickness of the damper device 100. (If the outer periphery of the rotary damper 110 and the guide rail support wall 137 are not separated, the support wall 131 of the case 130 is moved away from the pair of retainers 135, 135 to lower the rotary damper 110. Alternatively, it is necessary to widen the support wall 131 to provide the guide rail support wall 137, which leads to an increase in the size of the damper device 10).

Further, in this embodiment, as shown in FIGS. 5 and 6, an opening 139 is provided at one end side of the pair of second side walls 133, 133, into which the rotary damper 110 can be inserted. A guide rail support wall 137 is disposed on the other end side of the pair of second side walls 133, 133 and configured to connect the pair of second side walls 133, 133 to each other. Therefore, the rotary damper 110 can be inserted through the opening 139 on one end side of the pair of second side walls 133 , 133 and housed in the case 130 . Also, the rack body 160 can be inserted while being supported by the guide rail support wall 137 from the other end side of the pair of second side walls 133 , 133 . In this manner, since the rotary damper 110 and the rack body 160 can be inserted and assembled from one end side and the other end side of the pair of second side walls 133, 133, respectively, the assembling workability of the damper device 100 is improved. be able to. Further, since the pair of second side walls 133, 133 are connected to each other by the guide rail support wall 137 arranged on the other end side of the pair of second side walls 133, 133, the rigidity of the pair of second side walls 133, 133 is increased. can be ensured.

Furthermore, in this embodiment, the rotation damper 110 is provided with a protrusion 112 a that can be in point contact with the rear surface of the substrate 161 . Therefore, as shown in FIG. 9, the pair of guide rails 165, 165 of the rack body 160 are supported by the guide rail support wall 137 (here, the guide rail support wall 137 protrudes from the upper end surface of the guide rail support wall 137). The rear surface of the substrate 161 is supported by the projection 112a of the shaft portion 112 of the rotary damper 110, and is supported by three points. can be slidably supported while reducing In addition, since the projection 112a provided on the rotation damper 110 makes point contact with the back surface of the substrate 161, the shaft 112a between the pair of first side walls 163 and 163 does not come into contact with the back surface of the substrate 161 until the projection 112a contacts the back surface of the substrate 161. The portion 112 can be deeply inserted, and the pinion gear 120 and the rack gear 167 can be brought close to each other in the axial direction of the rotary damper 110, which contributes to the thinning of the damper device 100.

Further, in this embodiment, as shown in FIGS. 2 and 9, tapered surfaces 169, 169 are formed at the connecting portions of the pair of guide rails 165, 165 with the pair of first side walls 163, 163, respectively. 6 to 9, on the opposing surfaces 135a, 135a of the pair of retaining portions 135, 135, the substrate 161 and/or the substrate 161 of the rack body 160 are provided within the area E as shown in FIG. Alternatively, an elastic contact portion 145 is provided that elastically contacts the tapered surface 169 of the rack body 160 (flexively deformed by being pressed by the tapered surface 169 of the rack body 160) when at least a portion of the first side wall 163 enters. (Here, protrusions 145a, 145a provided on the outer surface side of elastic contact portions 145, 145 abut tapered surfaces 169, 169, respectively). Therefore, when the rack body 160 is slidably supported by the case 130, the elastic contact portions 145, 145 of the pair of retaining portions 135, 135 are placed on the tapered surfaces 169, 169 of the pair of guide rails 165, 165, respectively. 9), part of the reaction force is converted by the tapered surface 169 into a downward force as indicated by the arrow F2, and the rack body 160 moves toward the rotary damper 110. Since the rack body 160 is pressed in the opposite direction, rattling of the rack body 160 can be further reduced.

Also, the damper device 100 is mounted between a pair of parts that are close to each other and separate from each other, to which a braking force is to be applied. For example, in the case of a glove box, as described above, the hook 147 of the case 130 is connected to the side wall of the main body provided on the vehicle body side, and the bracket 171 is attached to the side wall of the glove box that opens and closes the main body. are connected via the mounting hole 171a. When the glove box is closed, the bracket 171 is positioned close to the case 130 as shown in FIG. When the stopper portion 173 comes into contact with the stopper engaging portion 134 (see FIG. 5) of the case 130, further withdrawal is restricted. In this embodiment, when pulling out the glove box, that is, in the process from FIG. 8A to FIG. , the damper device 100 is used.

As shown in FIG. 11, when rack body 160 is pulled out in direction A from case 130, pinion gear 120 meshing with rack gear 167 rotates counterclockwise as indicated by arrow C in the figure. Then, the rotor 111 connected to the pinion gear 120 via the shaft portion 112 rotates, and the gear housing 115 that contacts the rotor 111 via the viscous fluid also tries to rotate in the same direction. As a result, the large-diameter gear 116 rotates in the counterclockwise direction indicated by arrow C in FIG. . Then, the planetary gear 150 is engaged with the corner of the engaging portion 142 and the rotation of the planetary gear 150 is restricted, so that the large diameter gear 116 stops rotating and only the rotor 111 rotates within the gear housing 115. It will be. Therefore, a braking force is applied to the rotation of the rotor 111 through the viscous fluid, acting as a braking force to the movement of the rack body 160 in the arrow A direction. This prevents the glove box from opening suddenly.

Next, as shown in FIG. 12, when rack body 160 is pushed into case 130 in direction B, pinion gear 120 meshing with rack gear 167 rotates clockwise as indicated by arrow D in FIG. . Then, the rotor 111 connected to the pinion gear 120 via the shaft portion 112 rotates, and the gear housing 115 that contacts the rotor 111 via the viscous fluid also tries to rotate in the same direction. As a result, the large-diameter gear 116 rotates clockwise as indicated by arrow D in FIG. Then, the planetary gear 150 is allowed to rotate within the accommodating portion 140, so that the large-diameter gear 116 rotates together with the rotor 111, and the braking force against the movement of the rack body 160 is released. As a result, the rack body 160 can be pushed into the case 130 with little resistance, and the glove box can be quickly closed.

The present invention is not limited to the above-described embodiments, and various modified embodiments are possible within the scope of the present invention, and such embodiments are also included in the scope of the present invention. .

100 damper device 110 rotary damper 112 shaft 112a protrusion 120 pinion gear 130 case 131 support wall 133 second side wall 135 retaining portion 137 guide rail support wall 139 opening 145 elastic contact portion 150 planetary gear 160 rack body 161 substrate 163 first Side wall 165 Guide rail 167 Rack gear 169 Tapered surface

Claims (5)

A damper device that is attached between a pair of members that approach and separate from each other and applies a braking force when the pair of members approach or separate,
A case fixed to one member, a rack body connected to the other member and slidably supported by the case, and a braking force applied when the rack body slides are housed in the case. and a rotary damper,
The rack body includes a substrate extending with a predetermined length, a pair of first side walls erected from opposing portions of the substrate, a pair of guide rails projecting from the outer surface of each first side wall, and one first rail. and a rack gear formed on the inner surface of the side wall,
The rotary damper has a pinion gear disposed between the pair of first side walls and meshing with the rack gear,
The case includes a support wall that rotatably supports the rotary damper, a pair of second side walls that are erected from opposing portions of the support wall, and a pair of second side walls extending inward from tip sides of the pair of second side walls. and a pair of retaining portions that extend through the guide rails and overlap the guide rails to retain the rack body,
The minimum distance between the facing surfaces located at the ends in the extending direction of the pair of retaining parts is formed to be smaller than the maximum outer diameter of the rotary damper, and in the region formed between the facing surfaces, A damper device, wherein a part of the substrate and/or the first side wall is recessed. The case is provided with a guide rail support wall that supports the guide rail between itself and the retainer. When the case is viewed from the axial direction of the rotation damper, the guide rail support wall is 2. The damper device according to claim 1, wherein the damper device is spaced apart from the outer periphery of the rotary damper. one end side of the pair of second side walls is provided with an opening into which the rotary damper can be inserted, and the other end side of the pair of second side walls is provided with the guide rail support wall; 3. The damper device according to claim 2, wherein the pair of second side walls are connected to each other. 4. The damper device according to claim 2, wherein the rotary damper is provided with a protrusion capable of point contact with the rear surface of the substrate. A tapered surface is formed in each of the pair of guide rails at a portion connected to the first side wall,
The opposed surfaces of the pair of retaining portions are provided with elastic contact portions that make elastic contact with the tapered surfaces when the substrate and/or the first side wall partially enters the region. Item 5. The damper device according to any one of items 1 to 4.

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