JP5772722B2 - Lid opening / closing mechanism - Google Patents

Description

  The present invention relates to a lid opening / closing mechanism for opening / closing an opening of a main body having an opening.

  Various types of storage devices with lids are conventionally known. For example, storage devices such as cup holders and storage boxes are disposed in the interior of an automobile. As such an opening / closing mechanism of the lid of the storage device, there is a mechanism that swings the lid uniaxially with respect to the main body about one swinging shaft. When the lid body is oscillated uniaxially, the rocking locus of the lid body around the rocking shaft becomes large, and it is necessary to make a large space for opening and closing the lid body. In this case, in a limited space such as the interior of a car, it may be difficult to secure a space for arranging the storage device or it may be difficult to open and close the lid. Thus, for example, in Patent Documents 1 and 2, the lid body is biaxially swung with respect to the main body about two rocking shafts, thereby saving the space of the rocking locus of the lid body. An open / close mechanism for the lid is disclosed.

  FIG. 7 is a schematic cross-sectional view in the closed state of the storage device B1 including the lid opening / closing mechanism 51 disclosed in Patent Document 1. As shown in FIG. The storage device B1 is a center console box disposed in the center console 52 of the automobile. The lid opening / closing mechanism 51 is interposed between a main body 53 having an opening 53a and a lid 54 that opens and closes the opening 53a by swinging, and with respect to a surface orthogonal to the swing axes S1 and S2 of the lid 54. This is a mechanism provided in a plane symmetrical shape. That is, the lid opening / closing mechanism 51 is provided in a plane-symmetrical shape on one side wall 53L side of the main body 53 and the other side wall side (not shown) facing the one side wall 53L, and FIG. 2 shows an opening / closing mechanism 51 for the lid provided on the lid.

  As shown in FIG. 7, the lid opening / closing mechanism 51 has a first swing shaft S1 formed on one end side and a second swing shaft S2 formed on the other end side. A connecting arm portion 57 pivotally supported on one side wall 53L of the main body 53 in S1 and a partial arc shape along an arc centered on the first swing axis S1 are arranged on one side wall 53L of the main body 53. A fixed rack 55 and a partially arcuate pinion 56 pivotably supported by the second swing shaft S2 and meshing with the rack 55 are provided. A holding piece 54a extending in the direction of the opening 53a of the main body 53 is formed in the closed position of the lid body 54 on the swinging center side of the lid body 54, and a pinion 56 is integrally formed on the distal end side of the holding piece 54a. Yes.

  When the free end side of the lid body 54 is lifted from the closed position of the lid body 54 shown in FIG. 7, the holding piece 54a swings with respect to the connecting arm portion 57 about the second swing shaft S2. At this time, the pinion 56 provided on the holding piece 54a is engaged with the rack 55 fixed to the main body 53, so that the swing of the pinion 56 is driven, and the connecting arm portion 57 is moved to the first swing shaft S1. Swings downward about the center. Then, the second swing shaft S <b> 2 moves downward of the main body 53. In this manner, the lid 54 is swung by swinging the holding piece 54a around the second swing axis S2 with respect to the connecting arm portion 57 and the connecting arm portion 57 around the first swing axis S1. Two types of swinging, that is swinging with respect to the main body 53, are added together.

  FIG. 8 is a schematic cross-sectional view of the storage device B2 including the lid opening / closing mechanism 61 disclosed in Patent Document 2 in a transition state between an open state and a closed state. The storage device B2 is a center console box like the storage device B1 described above. The lid opening / closing mechanism 61 is interposed between a main body 63 having an opening 63a and a lid body 64 that opens and closes the opening 63a by swinging, with respect to a surface orthogonal to the swing axes T1 and T2 of the lid body 64. This is a mechanism provided in a plane symmetrical shape. That is, the lid opening / closing mechanism 61 is provided in a symmetrical manner on one side wall (not shown) of the main body 63 and on the other side wall 63R facing the one side wall, and FIG. 8 shows the other side wall 63R side. An opening / closing mechanism 61 of the provided lid is shown.

  As shown in FIG. 8, the lid opening / closing mechanism 61 is arranged in a partial arc shape along a first arc centered on the virtual first swing axis T <b> 1 of the lid 64, and is arranged on the other side wall 63 </ b> R of the main body 63. A fixed first rack 65, a partially arcuate first pinion 66 that is pivotally supported by the second swing shaft T2 and meshes with the first rack 65, and has a diameter larger than that of the first arc. A second rack 67 arranged in a partial arc shape along a second arc centered on one swing axis T1 and fixed to the other side wall 63R of the main body 63 is engaged with the second rack 67 and the lid 64 has a first And an arcuate second pinion 68 pivotally supported via a damper 69 at the center of rotation of the first pinion 66 serving as the second swing axis T2. A holding piece 64a extending in the direction of the opening 63a of the main body 63 is formed at the swinging center portion side of the lid body 64, and the first pinion 66 is fixed to the holding piece 64a. A torsion spring 70 is mounted so as to connect a boss 63c projecting from the upper portion of the other side wall 63R of the main body 63 and a mounting portion 66a formed at the lower portion of the first pinion 66.

  In the closed position of the lid body 64, the lid body 64 is locked in the closed position by a lock device (not shown) in a state where the urging force is accumulated in the torsion spring 70. When the lock of the lid body 64 is released, the lid body 64 starts to swing toward the open position by the urging force of the torsion spring 70 as shown in FIG. At this time, the first pinion 66 fixed to the holding piece 64a meshes with the first rack 65 fixed to the main body 63, so that the first pinion 66 swings around the second swing shaft T2. , The first pinion 66 swings downward about the first swing axis T1. Then, the second swing shaft T <b> 2 moves toward the lower side of the main body 63.

  In this manner, the lid 64 in the lid opening / closing mechanism 61 swings around the first swing pin T1 with respect to the main body 63 and around the second swing shaft T2. The two types of swinging of the first pinion 66 and the swinging of the first pinion 66 are added together. When the first pinion 66 swings downward, the second rack 67 and the second pinion 68 are engaged with each other, so that the urging force by the torsion spring 70 is attenuated by the damper 69. The Thereby, the cover body 64 is opened slowly, moves quietly, and can give a high-class feeling to the storage device B2.

Japanese Patent No. 4258175 JP 2009-248793 A

  In the lid opening / closing mechanism 51 disclosed in Patent Document 1, the lid 54 is moved in the direction of the swing axes S1 and S2 of the lid 54 and the swing axes S1 and S2 by the connecting arm portion 57 with respect to the main body 53. It is positioned in the direction orthogonal to Thereby, during the swinging operation of the lid body 54, the meshing between the rack 55 and the pinion 56 is not shifted in the swinging shafts S1 and S2, and the pitch circle of the teeth of the rack 55 and the pitch of the teeth of the pinion 56 are prevented. It is possible to maintain an appropriate distance from the circle. However, since the lid 54 is pivoted biaxially with respect to the main body 53, it is difficult to increase the number of parts compared to the lid opening / closing mechanism that pivots the lid uniaxially. . Specifically, the connecting arm portion 57 shown in FIG. 7 is a component that increases compared to a lid opening / closing mechanism that swings the lid uniaxially.

  On the other hand, in the lid opening / closing mechanism 61 disclosed in Patent Document 2, the first and second racks 65 and 67 fixed to the main body 63 and the first and second racks 65 and 67 are respectively provided. By combining the meshed first and second pinions 66 and 68 like a planetary gear, the lid 64 is swung biaxially with respect to the main body 63 without using the connecting arm portion 57 described above. Is possible. Therefore, in the lid opening / closing mechanism 61, the lid body 64 can be biaxially swung with a minimum increase in the number of parts, compared to the lid opening / closing mechanism that pivots the lid uniaxially. It is said.

  However, in the lid opening / closing mechanism 61, the torsion spring 70 serves as a holding means for holding the first rack 65 and the first pinion 66 so as not to be disengaged. It does not have a function of precisely positioning the movement of the lid 64 such as the connecting arm portion 57 provided in the opening / closing mechanism 51. For this reason, the lid 64 rattles with respect to the main body 63 in the directions of the swing axes T1 and T2 of the lid 64 and the direction orthogonal to the swing axes T1 and T2. If the first and second pinions 66 and 68 rattle between the first rack 65 and the second rack 67, the user will feel a harsh feeling due to the teeth meshing resistance, which deteriorates the operational feeling. There is a risk of inviting.

  The present invention has been made in view of the above circumstances, and an increase in the number of components is suppressed in a lid opening / closing mechanism in which a lid for opening / closing the opening biaxially swings with respect to a main body having an opening. It is an object of the present invention to provide a lid opening / closing mechanism that has a simple configuration and can provide a good operation feeling during the swinging motion of the lid.

In order to solve the above-described problem, the structural feature of the lid opening / closing mechanism according to claim 1 is interposed between the main body having an opening and the lid that opens and closes the opening by swinging. A lid opening / closing mechanism provided in a plane-symmetrical shape with respect to a plane orthogonal to the pivot axis of the lid so as to follow a first arc centered on a virtual first pivot axis of the lid A pair of first racks formed with teeth facing outward in the radial direction of the first arc and fixed to one side and the other side opposed to each other across the opening of the main body, and the first racks, A pair of arcuate first pinions that mesh with each other and are fixed to each of the one side and the other side of the lid, and the first swing shaft having a larger diameter than the first arc. The one side portion of the main body is formed with teeth facing inward in the radial direction of the second arc along the second arc as a center. And a pair of second racks fixed to the other side part, and mesh with each of the second racks, and are rotatable about the rotation center of each of the first pinions serving as the second swinging shaft of the lid. A pair of arcuate second pinions pivotally supported by
A pair of first fixed tapers that are formed to be inclined along the first arc and fixed to the one side portion and the other side portion of the main body while being inclined to approach the main body as the distance from the first swing shaft is increased. And a lid that is inclined so as to move away from the main body as it moves away from the second swing shaft and is formed along the pitch circle of the teeth of each first pinion and is fixed to each first pinion, A pair of first movable taper portions that are in contact with the first fixed taper portions at all times during the swinging motion of the first tilting portion and the second movable taper portions so as to be separated from the main body and away from the main body as the distance from the first swinging shaft is increased. A pair of second fixed taper portions formed on the one side portion and the other side portion of the main body, and inclined so as to move away from the main body as the distance from the second swing shaft increases. Pinion A pair of second movable taper portions formed along the pitch circle of the teeth and fixed to each second pinion, and always abutting against each second fixed taper portion during the swinging motion of the lid body. That is.

  In addition, the description of “fixed” in claim 1 means that it is provided in a fixed state rather than a movable state. Therefore, “fixed” includes both of fixing separate members (components) to each other with screws and the like, and forming two parts integrally.

  According to the lid opening / closing mechanism according to claim 1, the first rack formed along the first arc centered on the virtual first swing axis of the lid and fixed to the main body, and the lid The fixed first pinion is meshed. In addition, a second rack that is larger in diameter than the first arc and is formed along a second arc centered on the first swing axis and fixed to the main body, and a first rack that is the second swing axis of the lid A second pinion pivotally supported at the pivot center of the pinion is meshed. Thereby, it is possible to swing the lid body biaxially with respect to the main body with a simple configuration in which an increase in the number of parts is suppressed.

  According to the lid opening / closing mechanism of the first aspect, the arc-shaped first fixed taper portion fixed to the main body is inclined so as to approach the main body as the distance from the first swing shaft increases. In addition, the arc-shaped first movable taper portion fixed to the first pinion is inclined so as to be separated from the main body as the distance from the second swing shaft is increased. The first fixed taper portion and the first movable taper portion are always in contact with each other during the swinging motion of the lid. Therefore, the thrust received by the first movable taper portion fixed to the first pinion from the first fixed taper portion is always away from the main body in the direction orthogonal to the surface of the first fixed taper portion, that is, during the swinging motion of the lid. Direction and away from the first swing axis.

  According to the lid opening / closing mechanism of the first aspect, the arc-shaped second fixed taper portion fixed to the main body is inclined so as to be separated from the main body as the distance from the first swing shaft is increased. Further, the arc-shaped second movable taper portion fixed to the second pinion is inclined so as to be separated from the main body as it is separated from the second swing shaft. The second fixed taper portion and the second movable taper portion are always in contact with each other during the swinging operation of the lid. Therefore, the thrust received by the second movable taper portion fixed to the second pinion from the second fixed taper portion is always away from the main body in the direction orthogonal to the surface of the second fixed taper portion, that is, during the swinging motion of the lid. Direction toward the first swing axis.

  That is, the thrust received by the first pinion fixed to the lid from the first fixed taper portion and the second pinion pivotally supported by the first pinion in the direction perpendicular to the swing axis of the lid are the second fixed taper. The thrust received from the parts is in the direction of canceling each other. Further, in the swing axis direction of the lid, the thrust received by the first pinion fixed to one side of the lid from the first and second fixed taper portions on the one side and the other side of the lid The thrust received by the first pinion fixed to the part side from the first and second fixed taper parts on the other side part is in a direction to cancel each other.

  Therefore, according to the opening / closing mechanism of the lid according to the first aspect, the lid is strictly positioned with respect to the main body in the swing axis direction of the lid and the direction perpendicular to the swing axis. Therefore, the interval between the pitch circle of the teeth of the first rack and the pitch circle of the teeth of the first pinion and the interval between the pitch circle of the teeth of the second rack and the pitch circle of the teeth of the second pinion are respectively It is possible to always keep an appropriate interval during the swinging operation, and it is possible to obtain a good operation feeling during the swinging operation of the lid.

It is a perspective view in the closed state of the storage apparatus provided with the opening-closing mechanism of the lid concerning one embodiment. It is a disassembled perspective view of the storage apparatus provided with the opening-and-closing mechanism of the lid concerning one embodiment. It is a schematic cross section in a closed state of a storage device provided with an opening and closing mechanism of a lid concerning one embodiment. It is a schematic cross section in the transition state of the open state and closed state of the storage apparatus provided with the opening / closing mechanism of the lid according to one embodiment. It is a schematic cross section in the open state of the storage apparatus provided with the opening-and-closing mechanism of the lid concerning one embodiment. It is sectional drawing cut | disconnected by the AA line in FIG. It is a schematic cross section in the closed state of the storage apparatus provided with the conventional opening-closing mechanism of the cover body. It is a schematic cross section in the transition state of the open state and closed state of the storage apparatus provided with the other conventional opening-closing mechanism of the cover body.

  Based on FIGS. 1-6, the opening-closing mechanism of the cover which concerns on one Embodiment of this invention is demonstrated. In the description, “up”, “down”, “left”, “right”, “front”, and “rear” refer to “upper, lower, left, right, front, and rear” shown in FIGS. It refers to the upper, lower, left, right, front, and rear as viewed from the user facing the rear in 1 and 2. 1 and 2, the vertical direction is parallel to the paper plane, the front and right directions are the back direction of the paper, and the rear and left directions are the front side of the paper.

  FIG. 1 shows a perspective view in a closed state of a storage device B provided with a lid opening / closing mechanism 1 according to the present embodiment. FIG. 2 shows an exploded perspective view of the left half of the storage device B. FIG. The storage device B is a center console box made of synthetic resin and disposed on the center console 2 of the automobile. The storage device B includes a main body 3 having an opening 3a on the upper side and having a rectangular box shape, a lid 4 that opens and closes the opening 3a by swinging, and an open / close of the lid interposed between the main body 3 and the lid 4 And a mechanism 1. As shown in FIG. 1, the lid opening / closing mechanism 1 is a mechanism provided in a plane-symmetric shape with respect to a plane orthogonal to the swing axes A <b> 1 and A <b> 2 of the lid 4. That is, the lid opening / closing mechanism 1 is provided in a plane-symmetrical shape on the left side wall 3L (one side) side of the main body 3 and the right side wall 3R (other side) side facing the left side wall 3L.

  The lid opening / closing mechanism 1 includes a first rack 5, a first pinion 6, a second rack 7, a second pinion 8, and a damper 9, which are provided in a pair of left and right. Further, the lid opening / closing mechanism 1 includes a torsion spring (not shown) similar to the torsion spring 70 provided in the conventional lid opening / closing mechanism 61 shown in FIG. 8 and an illustration (not shown) that locks the lid 4 in the closed position. It is equipped with a lock mechanism. The lid 4 swings biaxially with respect to the main body 3 about the first swing axis A1 and the second swing axis A2 shown in FIG.

  Here, the first swing axis A1 is a virtual swing axis that does not have a shaft member. Since the lid opening / closing mechanism 1 is provided in a plane-symmetrical manner on the left side wall 3L side and the right side wall 3R side of the main body 3, in the following description, the lid opening / closing mechanism provided on the left side wall 3L side 1 and a description of the lid opening / closing mechanism 1 provided on the right side wall 3R side will be omitted.

  The first rack 5 is formed in a partially arcuate rib shape protruding from the left side wall 3L of the main body 3 along the first arc C1 centered on the first swing axis A1 (FIGS. 1 and 2). reference). The first rack 5 is formed with a large number of teeth 5a facing outward in the radial direction of the first arc C1. A first fixed taper portion 5 b is formed on the proximal end side of the first rack 5. The first fixed taper portion 5b is inclined so as to approach the left side wall 3L of the main body 3 as it moves away from the first swing axis A1, and is formed integrally with the first rack 5 along the first arc C1. (See FIG. 6).

  The first pinion 6 is a plate-like member that swings about the second swing axis A2, and has a large number of teeth 6a arranged in a partial arc shape on the first swing axis A1 side. (See FIGS. 1 and 2). A holding piece 4a extending in the direction of the opening 3a of the main body 3 at the closed position of the lid body 4 is formed on the swinging center side of the lid body 4 (front side in FIGS. 1 and 2). The first pinion 6 is integrally formed. A first movable taper portion 6 b is formed on the side of the first pinion 6 that faces the main body 3. The first movable taper portion 6b is inclined so as to be separated from the left side wall 3L of the main body 3 as it is separated from the second swing axis A2, and the first pinion 6 and the first pinion 6 are arranged along the pitch circle of the teeth 6a of the first pinion 6. They are integrally formed (see FIG. 6). As shown in FIG. 2, the first pinion 6 is formed with a round hole 6c penetrating in the thickness direction.

  As shown in FIGS. 1 and 3 to 6, the teeth 5 a of the first rack 5 and the teeth 6 a of the first pinion 6 are always meshed during the swinging operation of the lid 4. In addition, the first fixed taper portion 5 b formed integrally with the first rack 5 and the first movable taper portion 6 b formed integrally with the first pinion 6 are always in contact with each other during the swinging operation of the lid body 4. ing.

  The second rack 7 has a partial arc-shaped rib shape protruding from the left side wall 3L of the main body 3 so as to be along the second arc C2 having a larger diameter than the first arc C1 and centering on the first swing axis A1. Formed (see FIGS. 1 and 2). The second rack 7 is formed with a large number of teeth 7a facing inward in the radial direction of the second arc C2. A second fixed taper portion 7 b is formed on the proximal end side of the second rack 7. The second fixed taper portion 7b is inclined integrally with the second rack 7 along the second arc C2 while being inclined away from the left side wall 3L of the main body 3 as it is away from the first swing axis A1. (See FIG. 6).

  The second pinion 8 is a member having an arc shape that rotates around the second swing axis A2. The second pinion 8 is pivotally supported via a damper 9 at the rotation center of the first pinion 6 that becomes the second swing axis A <b> 2 of the lid body 4. A second movable taper portion 8 b is formed on the side of the second pinion 8 that faces the main body 3. The second movable taper portion 8b is inclined so as to be separated from the left side wall 3L of the main body 3 as it is separated from the second swing axis A2, and the second pinion 8 and the second pinion 8 are arranged along the pitch circle of the teeth 8a of the second pinion 8. They are integrally formed (see FIG. 6).

  As shown in FIGS. 1 and 3 to 6, the teeth 7 a of the second rack 7 and the teeth 8 a of the second pinion 8 always mesh with each other during the swinging operation of the lid body 4. Further, the second fixed taper portion 7b formed integrally with the second rack 7 and the second movable taper portion 8b formed integrally with the second pinion 8 are always in contact with each other during the swinging operation of the lid 4. ing.

  As shown in FIG. 6, when the rotor shaft 9a is rotated, the damper 9 is rotated by the rotor accommodated in the damper 9 and receiving the viscous resistance of a viscous fluid such as silicon oil. It is a part that obtains damping force. As shown in FIG. 6, the center of the second pinion 8 is connected to the rotor shaft 9 a of the damper 9.

  As shown in FIGS. 1 and 2, the lid opening / closing mechanism 1 is assembled as follows. The lid 4 is attached to the main body 3 so as to close the opening 3a of the main body 3 while keeping the lid 4 at the angle of the closed position. At this time, the main body so that the predetermined teeth 5a of the first rack 5 and the predetermined teeth 6a of the first pinion 6 mesh with each other while looking at the marks provided on the first rack 5 and the first pinion 6, respectively. A lid 4 is attached to 3. And after inserting the damper 9 in the state connected with the 2nd pinion 8 from the 2nd pinion 8 side in the round hole 6c formed in the 1st pinion 6, the damper 9 is inserted in the 1st pinion 6. Secure with screws. Thereby, the teeth 5a of the first rack 5 and the teeth 6a of the first pinion 6 mesh with each other, and the teeth 7a of the second rack 7 and the teeth 8a of the second pinion 8 mesh with each other. Is completed.

  The operation of the lid opening / closing mechanism 1 will be described with reference to FIGS. FIG. 3 is a schematic cross-sectional view of the storage device B provided with the lid opening / closing mechanism 1 in the closed state. FIG. 4 is a schematic cross-sectional view of the storage device B in a transition state between an open state and a closed state. FIG. 5 shows a schematic cross-sectional view of the storage device B in the open state. 3-5 has shown the state which looked at the storage apparatus B from the left, respectively.

  In the closed state of the storage device B shown in FIG. 3, the lid body 4 is locked in the closed position by a lock device (not shown) in a state where an urging force is accumulated in a not-shown torsion spring. When the lock of the lid body 4 is released, as shown in FIG. 4, the lid body 4 starts to swing toward the open position by the biasing force of a torsion spring (not shown). At this time, the first pinion 6 integrally formed on the distal end side of the holding piece 4a of the lid 4 is engaged with the first rack 5 formed on the main body 3, whereby the second swing shaft A2 is moved. While the swing of the first pinion 6 around the center is driven, the first pinion 6 swings downward about the first swing axis A1. Then, the second swing axis A <b> 2 moves toward the lower side of the main body 3.

  Subsequently, when the swing of the first pinion 6 is further driven by the biasing force of the unillustrated torsion spring from the transition state of the storage device B shown in FIG. 4, as shown in FIG. While the swing of the first pinion 6 about the axis A2 is driven, the first pinion 6 swings further downward about the first swing axis A1. Then, the second swing axis A <b> 2 further moves downward of the main body 3.

  For example, in the closed state of the storage device B shown in FIG. 3, a line connecting the first swing axis A1 and the second swing shaft A2 is a line LC, and in the transition state of the storage device B shown in FIG. A line connecting the swing axis A1 and the second swing axis A2 is a line LM, and a line connecting the first swing axis A1 and the second swing axis A2 in the open state of the storage device B shown in FIG. Is the line LO, the first pinion 6 swings downward about the first swing axis A1 by the angle α formed by the line LC and the line LM from the closed state to the transition state of the storage device B. Oscillate counterclockwise by an angle β around the second oscillation axis A2. Further, from the closed state to the open state of the storage device B, the first pinion 6 swings downward by an angle α ′ (α ′> α) formed by the line LC and the line LO around the first swing axis A1. And swings counterclockwise by an angle β ′ (β ′> β) about the second swing axis A2.

  Thus, the swing of the lid 4 in the lid opening / closing mechanism 1 is based on the swing of the first pinion 6 with respect to the main body 3 about the first swing axis A1 and the second swing axis A2. The two types of swinging of the first pinion 6 and the swinging of the first pinion 6 are added together. In this way, it is possible to swing the lid 4 while suppressing upward protrusion of the swing locus on the free end side of the lid 4. Further, since the teeth 7a of the second rack 7 and the teeth 8a of the second pinion 8 are always meshed during the swinging operation of the lid body 4, the urging force of the unillustrated torsion spring is applied to the damper. 9 is attenuated. As a result, the lid 4 is slowly opened and moved gently, and can impart a high-class feeling to the storage device B.

  As described above, the first fixed taper portion 5b and the first movable taper portion 6b are always in contact with each other during the swinging operation of the lid body 4. Further, the second fixed taper portion 7b and the second movable taper portion 8b are always in contact with each other during the swinging operation of the lid body 4. Therefore, as shown in FIG. 6, the thrust R1 in the direction orthogonal to the surface of the first fixed taper portion 5b acts on the first movable taper portion 6b at all times during the swinging operation of the lid body 4. The thrust R1 is directed away from the main body 3 and away from the first swing axis A1. In addition, a thrust R2 in a direction orthogonal to the surface of the second fixed taper portion 7b acts on the second movable taper portion 8b at all times during the swinging operation of the lid body 4. The thrust R2 is directed in a direction away from the main body 3 and in a direction approaching the first swing axis A1.

  According to such a configuration of the present embodiment, the first rack 5 formed along the first arc C1 around the virtual first swing axis A1 of the lid 4 and fixed to the main body 3, and the lid The first pinion 6 fixed to the body 4 is meshed. In addition, the second rack 7 is formed so as to be along the second arc C2 having a larger diameter than the first arc C1 and centered on the first swing axis A1, and is fixed to the main body 3. The second pinion 8 pivotally supported at the rotation center of the first pinion 6 serving as the movement axis A2 is meshed. Thereby, it is possible to swing the lid 4 biaxially with respect to the main body 3 with a simple configuration that suppresses an increase in the number of parts.

  In addition, according to the configuration of the present embodiment, the arc-shaped first fixed taper portion 5b fixed to the main body 3 is inclined so as to approach the main body 3 as the distance from the first swing axis A1 increases. Further, the arc-shaped first movable taper portion 6b fixed to the first pinion 6 is inclined so as to be separated from the main body 3 as it is separated from the second swing axis A2. The first fixed taper portion 5b and the first movable taper portion 6b are always in contact with each other during the swinging operation of the lid body 4. Accordingly, the first movable taper portion 6b receives the thrust R1 directed from the first fixed taper portion 5b in a direction away from the main body 3 and away from the first swing axis A1.

  Further, according to the configuration of the present embodiment, the arc-shaped second fixed taper portion 7b fixed to the main body 3 is inclined so as to be separated from the main body 3 as it is separated from the first swing axis A1. Further, the arc-shaped second movable taper portion 8b fixed to the second pinion 8 is inclined so as to be separated from the main body 3 as it is separated from the second swing axis A2. The second fixed taper portion 7b and the second movable taper portion 8b are always in contact with each other during the swinging operation of the lid body 4. Therefore, the second movable taper portion 8b receives the thrust R2 directed from the second fixed taper portion 7b in a direction away from the main body 3 and in a direction approaching the first swing axis A1.

  That is, the first pinion 6 fixed to the lid body 4 is pivotally supported by the first pinion 6 and the thrust R1 received from the first fixed taper portion 5b in the direction orthogonal to the swing axes A1 and A2 of the lid body 4. The thrust R2 received by the second pinion 8 from the second fixed taper portion 7b is in a direction to cancel each other. Further, the first pinion 6 fixed to the left side wall 3L side of the lid body 4 from the first and second fixed taper portions 5b and 7b on the left side wall 3L side in the swing axis A1, A2 direction of the lid body 4 The thrusts R1 and R2 that are received and the thrust that the first pinion fixed to the right side wall 3R side of the lid 4 receives from the first and second fixed taper portions on the right side wall 3R side cancel each other. Yes.

  Therefore, according to the lid opening / closing mechanism 1 according to the present embodiment, the lid 4 is in a direction perpendicular to the swing axis A1, A2 direction and the swing axis A1, A2 direction of the lid 4 with respect to the main body 3. Strictly positioned. Therefore, the interval between the pitch circle of the teeth 5a of the first rack 5 and the pitch circle of the teeth 6b of the first pinion 6, and the pitch circle of the teeth 7a of the second rack 7 and the pitch circle of the teeth 8a of the second pinion 8 Can be always kept at an appropriate interval during the swinging operation of the lid body 4, and a good operation feeling during the swinging operation of the lid body 4 can be obtained.

  The lid opening / closing mechanism of the present invention is not limited to the above-described embodiment, but can be modified and improved by those skilled in the art without departing from the scope of the present invention. It goes without saying that it can be implemented.

  For example, in the present embodiment, the storage device B is disposed with the opening 3a of the main body 3 facing upward, but the orientation of the storage device B is not limited. For example, the storage device B can be arranged with the opening 3a of the main body 3 obliquely upward, horizontally, or downward.

  Further, in the present embodiment, a torsion spring (not shown) that swings and biases the lid body 4 in the opening direction and a lock device (not shown) that locks the lid body 4 in the closed position are provided. 4 swings automatically. However, the swing of the lid 4 is not limited to automatic. The lid 4 may be manually oscillated without providing a torsion spring (not shown) and a locking device (not shown) in the lid opening / closing mechanism. In this case, since the operating force for manually swinging the lid 4 is attenuated by the damper 9, the user can feel an appropriate operating resistance when swinging the lid 4. Thus, it is possible to obtain a good operation feeling during the swinging motion of No. 4.

DESCRIPTION OF SYMBOLS 1 ... Opening-closing mechanism of a cover body 3 ... Main body 3a ... Opening 3L ... Left side wall (one side part)
3R: Right side wall (other side part) 4 ... Lid 5 ... First rack 5a ... Teeth 5b ... First fixed taper 6 ... First pinion 6a ... Teeth 6b ... First movable taper 7 ... Second rack 7a ... Tooth 7b ... Second fixed taper 8 ... Second pinion 8a ... Tooth 8b ... Second movable taper A1 ... First swing shaft A2 ... Second swing shaft C1 ... First arc C2 ... Second arc

Claims (1)

A lid opening / closing mechanism that is interposed between a body having an opening and a lid that opens and closes the opening by swinging, and is provided in a plane-symmetric shape with respect to a plane orthogonal to the swing axis of the lid. ,
One side portion facing the first arc of the first arc in the radial direction along the first arc centering on the virtual first swing axis of the lid body and facing the opening of the main body And a pair of first racks fixed to the other side,
A pair of arcuate first pinions meshed with each of the first racks and fixed to the one side and the other side of the lid;
Teeth that are larger in diameter than the first arc and that are radially inward of the second arc are formed along a second arc centered on the first swing axis, and the one side portion of the main body and the side A pair of second racks fixed to the other side;
A pair of arcuate second pinions that mesh with each of the second racks and that are pivotally supported at the rotation centers of the first pinions that serve as the second swing axis of the lid;
A pair of first fixed tapers that are formed to be inclined along the first arc and fixed to the one side portion and the other side portion of the main body while being inclined to approach the main body as the distance from the first swing shaft is increased. And
As the distance from the second swing shaft increases, the cover body tilts away from the main body and is formed along the pitch circle of the teeth of each first pinion and fixed to each first pinion. A pair of first movable taper portions that always abut against each of the first fixed taper portions during operation;
A pair of second fixed tapers that are formed to be inclined along the second arc and are fixed to the one side portion and the other side portion of the main body as they are separated from the main body as they are separated from the first swing shaft. And
The lid body swings away from the main body as it moves away from the second swing shaft and is formed along the pitch circle of the teeth of each second pinion and fixed to each second pinion. A pair of second movable taper portions always in contact with each of the second fixed taper portions during operation;
A lid opening / closing mechanism comprising:

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