JP7301804B2 - drive - Google Patents

Description

The present invention relates to drives.

2. Description of the Related Art A drive device is known that operates an operation target by winding a predetermined member using a spiral spring. For example, Patent Literature 1 discloses a webbing winding device that winds webbing around a winding shaft in layers.

This take-up device includes a spiral spring connected to a webbing take-up shaft, a drum-shaped connecting member that accommodates the spiral spring, and a spirally formed guide groove that rotates together with the drum-shaped connecting member. It has a plate and a disk-shaped adapter that rotates relative to the connecting member. The disk-shaped adapter has an arc-shaped through hole extending radially from its center, and a bearing hole is formed in the vicinity of the through hole. The disk-shaped adapter is fitted with a lever that engages both the arc-shaped through hole and the bearing hole and moves along the arc-shaped through hole with the bearing hole as the center. The lever has an engaging projection that enters the arc-shaped through hole, and this engaging projection also engages with a spiral guide groove provided on the limit plate.

When the disk-shaped adapter and the restricting plate having the spiral guide groove rotate relative to each other, the engaging projection of the lever is guided by the guide groove and moves along the arc-shaped through hole. Then, when the engaging projection of the lever reaches the spiral end portion of the guide groove, the movement of the engaging projection is restricted and the relative rotation between the adapter and the restricting plate is stopped.

Japanese Utility Model Laid-Open No. 3-122967

In the structure of Patent Document 1, when the engaging projection reaches the spiral end portion of the guide groove and the relative rotation between the adapter and the restricting plate stops, the engaging projection reaches the spiral end portion and the arc-shaped through hole. Force is received from the edge in the direction of relative rotation. Therefore, an impact is applied to the engaging projection each time the webbing is wound up, and the engaging projection and a portion of the lever in the vicinity of the engaging projection may be damaged.

SUMMARY OF THE INVENTION Accordingly, it is an object of the present invention to provide a driving device in which breakage of a slide member having an engaging projection is suppressed.

The drive device of the present invention includes a rotating member that rotates when an operation target is operated, a biasing member that biases the rotating member in a first rotating direction, and the rotating member in the first rotating direction. and an operating member connected to the rotating member for rotating in a second direction of rotation, which is the opposite direction; and a base provided so that the rotating member rotates relative thereto, wherein the base extends radially outward from the center of rotation of the rotating member. It has an arcuate groove extending in an arc shape and an engagement hole serving as the center of the arc of the arcuate groove. A slide member having an engaging projection that engages both and a connecting portion that connects the support shaft and the engaging projection is mounted, and the engaging projection of the slide member is located between the rotating member and the base. When relatively rotated, it is guided along the guide groove and moves along the arcuate groove, and the connecting portion moves from the base end of the engagement projection to the base end of the engagement projection and the support shaft. After extending in a direction including a component perpendicular to a line connecting the base end of the support shaft, it extends to the base end of the support shaft via a bent portion provided in the connecting portion.

According to the drive device of the present invention, breakage of the slide member having the engaging projection is suppressed.

1 is an exploded perspective view of a driving device according to one embodiment of the present invention; FIG. 2 is a front view of a base (first case member) provided in the drive device of FIG. 1; FIG. FIG. 3 is a cross-sectional view taken along line III-III of FIG. 2; (A) is a diagram showing a state in which the slide member is engaged at a second arcuate end of the arcuate groove provided in the base, and (B) is an operation on the base corresponding to the state of (A). It is a side view of a drive which shows the state of a member. (A) is a diagram showing a state in which the slide member has moved to an intermediate position between the first arc end and the second arc end of the arc groove; (B) is a view of (A); FIG. 10 is a side view of the drive device showing the state of the operating member relative to the base, corresponding to the state; (A) is a diagram showing a state in which the slide member has moved to the first arcuate end of the arcuate groove, and (B) shows a state of the operating member with respect to the base corresponding to the state of (A). It is a side view of a drive. (A) is a perspective view of the slide member of one embodiment, (B) is a front view of the slide member of (A), and (C) is a side view of the slide member of (A). (A) is a front view showing a slide member of a modification, and (B) is a side view of the slide member of (A). FIG. 5 is a cross-sectional view taken along the line IX-IX in FIG. 4(A); FIG. 10 is a schematic diagram showing, by two-dot chain lines, a state after elastic deformation of the slide member when force is applied from the end of the guide groove to the slide member of the present embodiment engaged with the circular arc groove; FIG. 10 is a schematic diagram showing a state in which a force is applied from the end of the guide groove to the conventional slide member engaged with the arcuate groove.

A driving device according to an embodiment of the present invention will be described below with reference to the drawings. The embodiments shown below are merely examples, and the driving device of the present invention is not limited to the following embodiments.

As shown in FIG. 1, the drive device 1 includes a rotating member 2 that rotates when an operation target (not shown) is operated, and a biasing member that biases the rotating member 2 in a first rotation direction D1. 3 and an operating member 4 connected to the rotating member 2 for rotating the rotating member 2 in a second direction of rotation D2 opposite to the first direction of rotation D1. Further, the drive device 1 rotates in conjunction with the rotating member 2, and the rotating member 2 rotates relative to the guide portion 5 having the guide groove 51 spirally provided along the direction in which the rotating member 2 rotates. It has a base 6 provided as follows.

The driving device 1 rotates the rotating member 2 by operating the operating member 4 to operate the operation target. An operation target is not particularly limited as long as it is directly or indirectly operated by the rotational force of the rotating member 2 . The operation target may be an object that rotates due to the rotational force of the rotating member 2 or an object that linearly moves due to the rotational force of the rotating member 2 .

The overall structure of the driving device 1 is not limited to the illustrated structure as long as the operation target is operated by rotating the rotating member 2 . In the present embodiment, as shown in FIG. 1, the driving device 1 includes a driving portion 7 connected to the rotating member 2 and a rotation operating portion 8 that operates by transmitting the rotational force of the rotating member 2 from the driving portion 7 . and In the present embodiment, the rotational force of the rotating member 2 is transmitted to the rotating operating section 8 via the driving section 7, and the operation target directly or indirectly connected to the rotating operating section 8 is operated.

The drive section 7 includes a driven member 71 , a rotation transmission member 72 and a plurality of gears 73 , 74 and 75 . The driven member 71 can be separated from the rotating member 2 in the direction of the axis X, and is connected to the rotating member 2 so as to be rotatable around the axis X. As shown in FIG. The rotation transmission member 72 engages with the driven member 71 when the driven member 71 is separated from the rotating member 2 in the direction of the axis X, and the rotational force of the driven member 71 is transmitted. A plurality of gears 73 , 74 , 75 transmit the rotational force of the rotation transmission member 72 to the rotation operating section 8 . The rotary operation portion 8 has an operation gear 81 rotated by transmission of the torque of the gear 74 or the gear 75 and an operation shaft 82 rotated by transmission of the torque of the operation gear 81 .

When the rotating member 2 rotates, the driven member 71 first moves away from the rotating member 2 in the direction of the axis X of the rotating member 2, and reaches a position where it can be engaged in the rotational direction with the rotation transmission member 72 having engaging teeth. move up to In this state, the driven member 71 becomes rotatable in the same direction as the rotating member 2 , rotates around the axis X together with the rotating member 2 , and rotates the rotation transmitting member 72 . When the rotation transmission member 72 rotates, the operating gear 81 of the rotary operating section 8 rotates via a plurality of gears 73, 74, and 75, and the operating shaft 82 connected to the operating gear 81 rotates, thereby moving the operation target. Manipulate.

In the present embodiment, the driving device 1 is driven in a first connection state in which the rotary action portion 8 rotates in one direction and is connected to the driving portion 7, and in a state in which the rotary action portion 8 rotates in the other direction. It has a switching member 9 for switching between the second connection state (the state shown in FIG. 1) connected to the portion 7 . Regarding this point, although a detailed description is omitted, each time the outer tube T is operated, the plate-like cam is operated via an operating member 91 connected to the outer tube T and a plate-like cam member 92 to which the gear 74 is connected. A state in which the gear 74 connected to the member 92 directly meshes with the operating gear 81 (first connection state; torque is transmitted in the order of the gear 73, the gear 74, and the operating gear 81). It moves between a state in which it meshes with the meshing gear 75 (a second connected state in which rotational force is transmitted in the order of gear 73, gear 74, gear 75, and operating gear 81). As a result, the operation of the operation member 4 in one direction enables the operation of the operation target in both one direction and the other direction (for example, the operation target can be opened and closed, or moved up and down). .

The drive section 7, the rotary operation section 8, and the switching member 9 are not limited to the illustrated structures, and are not essential in the present invention, so detailed description thereof will be omitted.

The operating member 4 is a member operated to rotate the rotating member 2 . In the present embodiment, the operating member 4 rotates the rotating member 2 to operate the operation target via the driving section 7 and the rotation operating section 8 . The operating member 4 is directly or indirectly connected to the rotating member 2 so as to rotate the rotating member 2 in the second rotation direction D<b>2 against the biasing force of the biasing member 3 .

The structure of the operating member 4 is not particularly limited as long as the rotating member 2 can be rotated. In this embodiment, the operating member 4 is a cable connected to the rotating member 2, but may be an elongated body other than a cable. More specifically, the operation member 4 is a flexible inner cable inserted through the outer tube T. As shown in FIG.

In this embodiment, one end of the operating member 4 is connected to the rotating member 2 and the operating member 4 is partially wound around the rotating member 2 . The operating member 4 can be wound around the rotating member 2 and unwound from the rotating member 2 . When the operating member 4 is pulled downward in FIG. 1, the operating force is transmitted from the operating member 4 to the rotating member 2, and the rotating member 2 rotates in the second rotation direction D2. The other end of the operation member 4 extends from a base 6 configured as a case (in this embodiment, it is configured by a first case member 6a and a second case member 6b; hereinafter, the base 6 is also referred to as the case 6). , and can be manipulated by the user. In this embodiment, the other end of the operation member 4 is provided with an operation portion P that can be operated by the user. The operation member P is operated by the user and the operation member 4 is pulled, whereby the operation member 4 is extended from the rotating member 2 . At this time, the rotating member 2 rotates about the axis X in the second rotation direction D2 against the biasing force of the biasing member 3 .

The outer tube T partially covers the outer circumference of the operating member 4 . The outer tube T is a tubular member with both ends opened, and accommodates the operation member 4 so that the operation member 4 can move relative to the outer tube T along the longitudinal direction of the outer tube T. As shown in FIG. In the present embodiment, as described above, the outer tube T is in the first connection state in which it is connected to the drive section 7 while the rotary action section 8 rotates in one direction, and in the first connection state in which the rotary action section 8 rotates in the other direction. It is operated when switching to the second connection state in which it is connected to the drive unit 7 in the state. One end Ta of the outer tube T is connected to the switching member 9 (operating member 91 ) and positioned inside the case 6 , and the other end Tb of the outer tube T is positioned outside the case 6 . The outer tube T has an outer tube operating portion P2 for operating the outer tube T on the side of the other end Tb.

The rotating member 2 rotates when the operation target is operated. In this embodiment, the operation target is operated by directly or indirectly transmitting the rotational force of the rotating member 2 to the operation target. One end of an operating member 4 is connected to the rotating member 2, and the operating member 4 is operated to rotate in the second rotation direction D2. Further, after the rotating member 2 rotates in the second rotating direction D2, when the operating force applied to the operating member 4 is released, the biasing member 3 causes the rotating member 2 to rotate in the first rotating direction opposite to the second rotating direction D2. , and returns to the initial position. In this embodiment, when the operation target is operated, the rotating member 2 rotates in the second rotation direction D2, and when the operation on the operation target is released, the rotating member 2 is rotated by the biasing member 3 in the second direction. 1 rotates in the direction of rotation D1.

The structure of the rotating member 2 is not particularly limited as long as it can be rotated by operating the operating member 4 . In this embodiment, the rotating member 2 is a drum that is rotatable with respect to the base (case) 6 . More specifically, as shown in FIG. 1, the rotating member 2 has a winding groove 2a around which the operation member 4 is wound, and a housing portion 2b into which the biasing member 3 is housed. .

The biasing member 3 biases the rotating member 2 in the first rotation direction D1. In this embodiment, the first rotation direction D1 is the direction in which the rotating member 2 winds the operating member 4 . When the operating member 4 is pulled and the rotating member 2 rotates so that the operating member 4 is drawn out from the rotating member 2 , a biasing force is accumulated in the biasing member 3 . When the operation of the operating member 4 is released, the biasing force accumulated in the biasing member 3 rotates the rotating member 2 in the first rotation direction D1 in which the operating member 4 is wound, and the operating member 4 returns to the initial position. .

The structure of the biasing member 3 is not particularly limited as long as it can bias the rotating member 2 in the first rotation direction D1. In this embodiment, as shown in FIG. 1, the biasing member 3 is a spiral spring. The urging member 3, which is a spiral spring, is housed in a housing portion 2b as a recess provided on one end face of the rotating member 2 in the X-axis direction. attached to the Note that the biasing member 3 may be composed of another type of spring as long as it can bias the rotating member 2 in the first rotation direction D1. Alternatively, the biasing member 3 may be indirectly connected to the rotating member 2 via another member to bias the rotating member 2 in the first rotation direction D1.

The guide portion 5 rotates in conjunction with the rotating member 2 and has a guide groove 51 spirally provided along the direction in which the rotating member 2 rotates. The guide portion 5 guides an engagement protrusion Sb of the slide member S, which will be described later, along the guide groove 51 of the guide portion 5 when the rotating member 2 rotates.

In this embodiment, the guide part 5 is attached to the rotating member 2 so as to rotate together with the rotating member 2 . The guide part 5 rotates around the axis X together with the rotating member 2 . The structure of the guide portion 5 is not particularly limited as long as it can guide the engagement protrusion Sb of the slide member S along the guide groove 51 when the rotary member 2 rotates. In this embodiment, the guide portion 5 is formed in a disc shape with a spiral guide groove 51 formed therein. The guide groove 51 has a first end 51a close to the rotation axis (axis X) of the guide portion 5 and a second end 51b close to the outer circumference of the guide portion 5, as shown in FIG. groove. The guide groove 51 has a width that can accommodate the engagement protrusion Sb of the slide member S. As shown in FIG. In this embodiment, the guide groove 51 does not penetrate in the direction of the axis X, but the guide groove 51 may penetrate.

The base 6 is a member to which the rotating member 2 is provided so as to be relatively rotatable and to which the slide member S is attached. The structure of the base 6 is not particularly limited as long as the rotary member 2 can be provided rotatably relative to the base 6 and the slide member S can be attached. In this embodiment, the base 6 is a case that accommodates some of the components of the driving device 1 . In this embodiment, the case 6 includes a first case member 6a and a second case member 6b that are connected to each other in the X-axis direction.

In this embodiment, the base 6 (first case member 6a in this embodiment) has a first surface F1 and a second surface F2 opposite to the first surface F1. (See Figures 3 and 9). The first surface F1 is a surface facing the guide portion 5 . The second surface F2 is the surface to which the slide member S is attached.

As shown in FIG. 2 , the base 6 includes an arcuate groove 61 extending in an arc from the side of the rotation center (axis X) of the rotation member 2 toward the outside in the radial direction of the rotation member 2 and the center of the arc of the arcuate groove 61 . It has an engagement hole 62 that becomes

As shown in FIGS. 2 and 3, the arcuate groove 61 is formed in an arcuate shape centering on the engagement hole 62, and is aligned with the engagement protrusion Sb (FIGS. 7C and 8B) of the slide member S. and FIG. 9) are guided in a predetermined range. In addition, the arcuate groove 61 restricts movement of the engaging protrusion Sb in the rotational direction of the guide portion 5 . The arcuate groove 61 is provided penetrating from the first surface F1 to the second surface F2. In this embodiment, as shown in FIGS. 2 and 3, the arcuate groove 61 is formed as a partial arcuate groove centered on the engagement hole 62, and is aligned with the rotation center (axis X) of the rotating member 2. It has a first arcuate end portion 61a that is the side end portion and a second arcuate end portion 61b that is the radially outer end portion of the rotary member 2 . Also, the arcuate groove 61 has a first side edge E1 and a second side edge E2. In this embodiment, the first side edge E1 is the edge closer to the engagement hole 62, and the second side edge E2 is the edge farther from the engagement hole 62. As shown in FIG. A groove width between the first side edge E1 and the second side edge E2 is set so as to have a clearance with the outer periphery of the engaging projection Sb.

The engaging protrusion Sb inserted into the arcuate groove 61 penetrates the arcuate groove 61 and also enters the guide groove 51 of the guide portion 5, as shown in FIG. As will be described later, the engaging projection Sb of the slide member S is guided along both the guide groove 51 and the arcuate groove 61, and is configured to swing about the engaging hole 62 (Figs. See Figure 6). In this embodiment, in the non-operating state (initial state, shown in FIG. 4) in which the operating member 4 is not operated, the engaging projection Sb is positioned on the second arcuate end portion 61b side of the arcuate groove 61. , are located on the second end 51b side of the guide groove 51 . When the operation member 4 is operated and the guide portion 5 rotates together with the rotation member 2 in the second rotation direction D2, the engagement protrusion Sb of the slide member S forms an arcuate groove as shown in FIGS. 61 from the second arc end 61b side toward the first arc end 61a side (at this time, the engaging protrusion Sb moves from the second end portion 51b side of the guide groove 51 toward the first end portion). 51a). On the other hand, when the operation of the operating member 4 is released from the state shown in FIG. Sb moves from the first arc end portion 61a side of the arc groove 61 toward the second arc end portion 61b side (at this time, the engaging projection Sb moves toward the first end portion 51a side of the guide groove 51). from toward the second end 51b). In this embodiment, as shown in FIG. 6, when the engaging protrusion Sb moves toward the first arcuate end portion 61a of the arcuate groove 61, the engaging protrusion Sb moves toward the first arcuate end portion 61a of the guide groove 51. Although it approaches the end portion 51a, it does not reach and contact the first end portion 51a. However, the engagement protrusion Sb is configured to contact the first end 51a of the guide groove 51 when it moves toward the first arcuate end 61a of the arcuate groove 61. good too. Further, as a modification, for example, when the biasing direction of the biasing member 3 is opposite to that of the present embodiment, the engagement projection Sb is in a circular arc in a non-operating state (initial state) in which the operating member 4 is not operated. It may be positioned on the first arc end 61 a side of the groove 61 and on the first end 51 a side of the guide groove 51 . In this case, when the operating member 4 is operated and the guide portion 5 rotates together with the rotating member 2 in the second rotation direction D2, the engaging protrusion Sb of the slide member S is positioned at the first arcuate end portion of the arcuate groove 61. It moves from the 61a side toward the second arc end 61b side.

A support shaft Sa (see FIGS. 7(C), 8(B) and 9) of the slide member S, which will be described later, is inserted into the engagement hole 62 . The engagement hole 62 is provided at the center of the arc of the arcuate groove 61 and serves as the rotation center of the slide member S. As shown in FIG. The engagement hole 62 is not particularly limited as long as it is a hole with which the support shaft Sa of the slide member S engages and serves as the center of rotation of the slide member S. In this embodiment, as shown in FIGS. 2 and 3, the engagement hole 62 is a hole having a substantially circular cross section that extends a predetermined length in the direction of the axis X so that the support shaft Sa can be inserted. .

A slide member S is attached to the base portion 6 . As shown in FIGS. 7A to 7C, the slide member S has a support shaft Sa that engages with the engagement hole 62 and an engagement projection Sb that engages with both the arcuate groove 61 and the guide groove 51. and a connecting portion Sc that connects the support shaft Sa and the engaging protrusion Sb. As shown in FIGS. 7A and 7B, the connection portion Sc connects the proximal end Sb1 of the engaging projection Sb to the proximal end Sb1 of the engaging projection Sb and the proximal end Sa1 of the support shaft Sa. After extending in a direction including a component perpendicular to the line L, it extends to the proximal end Sa1 of the support shaft Sa via the bent portion CV provided in the connecting portion Sc. In this embodiment, after the slide member S is attached to the second surface F2 of the base portion 6, it is prevented from being detached by a cover member 63 (see FIG. 1) that covers the slide member S in the X-axis direction.

As shown in FIGS. 4 to 6, when the operation member 4 is operated, the slide member S swings about the engagement hole 62 and moves within the guide groove 51 and arcuate groove 61 of the guide portion 5. to slide. In this embodiment, in order to improve the durability of the biasing member 3, the slide member S pre-winds the biasing member 3 in a non-operating state in which the operating member 4 is not operated. The rotary member 2 and the guide portion 5 are held at a predetermined rotational position so that the spiral spring is wound from the free state to the lower limit of the number of turns that can be used. Specifically, when the rotating member 2 and the guide portion 5 are rotated in the first rotation direction D1 by the biasing force of the biasing member 3, the biasing member 3 accumulates a predetermined biasing force. The rotating member 2 and the guiding portion 5 are held so that the rotating member 2 and the guiding portion 5 are stopped in a state where the biasing force remains. At this time, when the engaging projection Sb of the slide member S is positioned at one end of the arcuate groove 61 (in this embodiment, the second arcuate end 61b), one end of the guide groove 51 ( In this embodiment, it contacts and engages the second end 51b).

The shape and structure of the slide member S are not particularly limited as long as it has a support shaft Sa, an engaging projection Sb, and a connecting portion Sc having a bent portion CV, which will be described later. In this embodiment, as shown in FIGS. 4 to 6, the slide member S is configured in a substantially C-shape or substantially U-shape when viewed in the direction of the axis X in a state of being attached to the base portion 6. ing. The material forming the slide member S is not particularly limited, but is preferably an elastically deformable material such as metal or synthetic resin.

The support shaft Sa engages with the engagement hole 62 of the base 6 . The support shaft Sa serves as the center of rotation when the slide member S swings. The shape of the support shaft Sa is not particularly limited as long as it serves as the center of rotation when the slide member S swings. In this embodiment, the support shaft Sa extends along the direction of the axis X when the slide member S is attached to the base portion 6, and is shaped like a shaft having a substantially circular cross section perpendicular to the direction of the axis X. .

The engagement protrusion Sb is guided along the guide groove 51 and moves along the circular arc groove 61 when the rotating member 2 and the base 6 rotate relative to each other. The engagement protrusion Sb is formed to have a length that allows it to pass through the arcuate groove 61 and enter the guide groove 51, as shown in FIG. The shape of the engagement protrusion Sb is not particularly limited as long as it can be guided along the guide groove 51 and can move along the arcuate groove 61 when the rotary member 2 and the base 6 rotate relative to each other. In this embodiment, the engaging projection Sb extends substantially parallel to the support shaft Sa, extends along the axis X direction when the slide member S is attached to the base portion 6, and has a cross section perpendicular to the axis X direction. is formed in a substantially circular shaft shape. Engagement protrusion Sb is formed to be slightly smaller than the groove width of guide groove 51 and arcuate groove 61 , and there is a clearance between engagement protrusion Sb and the inner surfaces of guide groove 51 and arcuate groove 61 . You will be guided in the state of

The connecting portion Sc is a portion that connects the support shaft Sa and the engaging protrusion Sb. As shown in FIGS. 7A and 7B, the connection portion Sc connects the proximal end Sb1 of the engaging projection Sb to the proximal end Sb1 of the engaging projection Sb and the proximal end Sa1 of the support shaft Sa. After extending in a direction including a component perpendicular to the line L, it extends to the proximal end Sa1 of the support shaft Sa via the bent portion CV provided in the connecting portion Sc.

The "direction including a component perpendicular to the line L connecting the base end Sb1 of the engaging protrusion Sb and the base end Sa1 of the support shaft Sa" is a direction substantially perpendicular to the line L or a direction substantially perpendicular to the line L. Includes directions that are oblique to the vertical. In this embodiment, the connecting portion Sc extends in a direction perpendicular to the line L from the base end Sb1 of the engaging projection Sb, as shown in FIG. 7(B). When the connecting portion Sc is inclined from the base end Sb1 of the engaging protrusion Sb to the direction perpendicular to the line L, when viewed in the direction of the axis X, the connecting portion Sc is inclined from the base end Sb1 of the engaging protrusion Sb It is preferable to incline so as to approach the base end Sa1 of the support shaft Sa. Further, in the present embodiment, the connecting portion Sc extends obliquely with respect to the direction perpendicular to the line L from the base end Sa1 of the support shaft Sa. Specifically, when viewed in the direction of the axis X, the connecting portion Sc extends from the proximal end Sa1 of the support shaft Sa at an angle so as to approach the proximal end Sb1 of the engaging protrusion Sb. Note that the connecting portion Sc may extend in a direction perpendicular to the line L from the base end Sa1 of the support shaft Sa.

The extending direction of the connecting portion Sc may extend away from the second surface F2 of the base portion 6 (toward the front side of the paper in FIG. 4A) when the slide member S is attached to the base portion 6. However, in this embodiment, as shown in FIG. 4A, the connecting portion Sc extends curvedly within a plane substantially perpendicular to the rotation axis (axis X) of the rotating member 2 . In this case, the amount of protrusion of the connecting portion Sc from the second surface F2 of the base portion 6 can be suppressed, and the driving device 1 can be made compact.

In this embodiment, as shown in FIG. 4A, the connecting portion Sc engages within a plane substantially perpendicular to the axis X of the rotating member 2 with the slide member S attached to the base portion 6. It extends from the proximal end Sb1 of the protrusion Sb in a direction substantially perpendicular to the line L connecting the proximal end Sb1 of the engaging protrusion Sb and the proximal end Sa1 of the support shaft Sa. More specifically, as shown in FIG. 7B, the connecting portion Sc extends from the proximal end Sb1 of the engaging projection Sb to the proximal end Sb1 of the engaging projection Sb and the proximal end Sa1 of the support shaft Sa. A straight portion ST1 extending in a direction substantially perpendicular to the connecting line L and a base end Sa1 of the support shaft Sa that is inclined with respect to a direction perpendicular to the line L and a base end Sa1 of the support shaft Sa , a straight portion ST2 extending obliquely so as to approach the base end Sb1 of the engaging projection Sb, and a bent portion CV bending and connecting the straight portions ST1 and ST2.

Moreover, the slide member S may be configured as shown in FIGS. 8(A) and (B). The slide member S shown in FIGS. 8A and 8B is attached to the base portion 6, and the base portion of the engagement protrusion Sb is positioned within a plane substantially perpendicular to the axis X of the rotation member 2. It is inclined from the end Sb1 with respect to the direction perpendicular to the line L, and is inclined from the base end Sb1 of the engaging projection Sb toward the base end Sa1 of the support shaft Sa. Specifically, as shown in FIG. 8A, the connecting portion Sc includes a linear portion ST3 extending from the proximal end Sb1 of the engaging protrusion Sb so as to approach the proximal end Sa1 of the support shaft Sa; It has a straight portion ST4 that obliquely extends from the proximal end Sa1 of the support shaft Sa toward the proximal end Sb1 of the engaging projection Sb, and a bent portion CV that curves and connects the straight portions ST3 and ST4. there is The shape of the slide member S is not limited to that shown in FIGS. 7 and 8, as described above.

The bent portion CV connects the support shaft Sa and the engaging protrusion Sb not in a straight line (instead of connecting them along the line L in FIG. 7B) but in a curved manner. By providing the bent portion CV, as will be described later, the slide member S can be deformed so as to absorb the impact applied to the engaging projection Sb. The shape of the bent portion CV is not particularly limited as long as the slide member S can be deformed so as to absorb the impact applied to the engaging projection Sb. In this embodiment, there is one bent portion CV, but a plurality of bent portions may be provided.

In the present embodiment, the connecting portion Sc includes a component perpendicular to the line L connecting the proximal end Sb1 of the engaging projection Sb to the proximal end Sa1 of the support shaft Sa. After extending in the direction, it extends to the proximal end Sa1 of the support shaft Sa via the bent portion CV provided in the connecting portion Sc. As a result, when the rotating member 2 rotates relative to the base portion 6 and the engagement protrusion Sb and the end portion of the guide groove 51 engage with each other to stop the relative rotation of the rotating member 2, the slide member S Damage can be suppressed. Specifically, when the rotating member 2 rotates relative to the base portion 6 and the engagement protrusion Sb and the end of the guide groove 51 are engaged with each other, the end of the guide groove 51 (in this embodiment, When force is applied to the engaging projection Sb from the second end portion 51b), the slider member S moves around the bending portion CV as a fulcrum, and the portion of the connecting portion Sc between the bending portion CV and the engaging projection Sb is elastically deformed. Therefore, the impact applied to the engagement protrusion Sb from the end of the guide groove 51 can be absorbed by the elastic deformation of the slide member S (connecting portion Sc). As a result, breakage of the slide member S, particularly the engaging projection Sb and the portion near the base end Sb1 of the engaging projection Sb, is suppressed.

Hereinafter, the effects of the slide member in the drive device 1 of this embodiment will be described in more detail.

4A and 4B show an initial state in which the operating member 4 is not operated. When the operating member 4 is pulled from the initial state shown in FIG. 4B, the rotating member 2 and the guide portion 5 rotate in the second rotation direction D2 (counterclockwise in FIG. 4A). When the rotating member 2 and the guide portion 5 rotate, the engagement protrusion Sb is guided by the arcuate groove 61 in a state of entering the spiral guide groove 51, and is gradually moved to the first arcuate end portion 61a of the arcuate groove 61. It approaches (see FIG. 5(A)). When the operating member 4 is further operated to further rotate the rotary member 2 and the guide portion 5 and the engaging projection Sb moves toward the first end portion 51a in the spiral guide groove 51, the engaging projection Sb reaches the first arcuate end 61a of the arcuate groove 61 (see FIG. 6A). At this time, in the driving device 1, the operation target is operated via the driving portion 7 and the rotation operating portion 8 by rotating the rotating member 2 in the second rotating direction D2. In this embodiment, when the operation member 4 is fully pulled (see FIG. 6B), the engagement protrusion Sb is positioned within the guide groove 51 at a position away from the first end 51a. ing. However, the engaging protrusion Sb may be configured to contact the first end portion 51a of the guide groove 51 when the operating member 4 is pulled out.

When the operation of the operating member 4 is released from the state shown in FIGS. 6A and 6B, the connection between the rotating member 2 and the driving portion 7 is released, and the rotation of the rotating member 2 is transmitted to the operation target. Gone. Further, when the operation of the operating member 4 is released, the rotating member 2 rotates in the first rotation direction D1 due to the biasing force of the biasing member 3, and the operating member 4 extended from the rotating member 2 moves toward the rotating member 2. be wound up. At this time, the guide portion 5 rotates together with the rotating member 2 in the second rotation direction D2, and accordingly the engagement protrusion Sb is guided to move in the guide groove 51 toward the second end portion 51b. . Further, the engaging projection Sb moves in the arcuate groove 61 from the first arcuate end portion 61a side toward the second arcuate end portion 61b.

The rotary member 2 and the guide portion 5, which are rotated in the first rotation direction D1 by the biasing force of the biasing member 3, move from the state shown in FIG. 5A to the state shown in FIG. and the second end portion 51b of the guide groove 51 of the guide portion 5 collide with each other. At this time, as shown in FIG. 9, the engaging projection Sb is sandwiched between the second end 51b of the guide groove 51 and the side edge (second side edge E2) of the circular arc groove 61. Become. The engagement projection Sb collides with the second end 51b of the guide groove 51 of the guide portion 5 and receives a force F in the rotation direction (first rotation direction D1) of the rotary member 2, as shown in FIG. , the slide member S is slightly elastically deformed with the bent portion CV as a fulcrum (see the two-dot chain line in FIG. 10). As a result, the collision between the engaging projection Sb and the second end portion 51b of the guide groove 51 of the guide portion 5 is absorbed, and damage to the engaging projection Sb and the vicinity of the base portion Sb1 of the engaging projection Sb is suppressed. On the other hand, as shown in FIG. 11, in the case of the slide member S2 that does not have the bent portion CV, the engagement protrusion Sb collides with the second end 51b of the guide groove 51 of the guide portion 5, causing the slide member S2 to rotate. When a force F is applied in the rotational direction of the member 2 (the first rotational direction D1), it is almost impossible to absorb the impact. Therefore, when the slide member S2 was repeatedly used, the slide member S2 was broken in the vicinity of the region R near the base end Sb1 of the engaging protrusion Sb.

In this embodiment, the slide member S disperses the force applied to the engaging protrusion Sb to the bent portion CV other than the engaging protrusion Sb, so that the force applied to the vicinity of the base end Sb1 of the engaging protrusion Sb is small. As a result, breakage of the slide member S is suppressed. Further, in the present embodiment, since the slide member S has the bent portion CV, it is possible to extend from the state shown in FIG. When a force is applied to the slide member S up to the state of 6(A), the slide member S elastically deforms with the bent portion CV as a fulcrum, and the shock can be absorbed.

Further, in this embodiment, as shown in FIG. 10, the connecting portion Sc is rotated in the first rotational direction D1 from the base end Sb1 of the engaging projection Sb to the second end 51b of the guide groove 51. It extends in a direction (substantially perpendicular direction) inclined with respect to the direction of the force F along it. In this case, when the force F applied from the second end portion 51b of the guide groove 51 is applied, the connecting portion Sc easily bends around the bent portion CV, and damage to the slide member S can be further suppressed.

Further, in the present embodiment, as shown in FIGS. 2, 3, 4A, and 9, the second surface F2 of the base 6 extends in a direction substantially perpendicular to the second surface F2. It has a protruding first wall W1. The first wall portion W1 is formed at the peripheral edge (second side edge E2 side) of at least one end (in this embodiment, the second arc end 61b) of the arcuate groove 61, at the end of the guide groove 51 (the main wall). In the embodiment, it is provided so as to come into contact with the engaging protrusion Sb when a force F is applied to the engaging protrusion Sb from the second end 51b). Since the first wall portion W1 is provided on the second surface F2 of the base portion 6, the engaging projection Sb is attached not only to the inner wall (second side edge E2) of the arcuate groove 61 but also to the first wall portion W1. are in contact with each other, and the force applied to the engaging projection Sb is dispersed. Therefore, breakage of the engaging protrusion Sb is further suppressed. In addition, in this embodiment, the first wall portion W1 is provided so as to form the same surface as the second side edge E2, which is the inner wall of the arcuate groove 61. As shown in FIG. Also, the height of the first wall W1 from the second surface F2 is not particularly limited. Moreover, although the first wall portion W1 is provided only on the second arc end portion 61b side of the arc groove 61 in the present embodiment, it may be provided on the first arc end portion 61a side.

Further, in this embodiment, as shown in FIGS. 2, 3, 4A, and 9, the second surface F2 of the base 6 extends in a direction substantially perpendicular to the second surface F2. It has a protruding second wall W2. The second wall portion W2 is formed at a peripheral edge (first side edge E1 side) of at least one end (second arc end 61b in the present embodiment) of the arc groove 61, with the arc groove 61 interposed therebetween. It is provided so as to face one wall portion W1. In this case, the position of the engaging protrusion Sb of the slide member S is easily stabilized by being sandwiched between the first wall portion W1 and the second wall portion W2. Therefore, the engagement protrusion Sb is prevented from moving in the direction of exiting from the guide groove 51 and the arcuate groove 61 .

REFERENCE SIGNS LIST 1 driving device 2 rotating member 2a winding groove 2b accommodating portion 3 biasing member 4 operating member 5 guide portion 51 guide groove 51a first end portion 51b second end portion 6 base portion (case)
6a First case member 6b Second case member 61 Arc groove 61
61a first arc end 61b second arc end 62 engagement hole 63 cover member 7 drive part 71 driven member 72 rotation transmission member 73, 74, 75 gear 8 rotation operation part 81 operation gear 82 operation shaft 9 switching member 91 actuating member 92 plate-like cam member CV bent portion D1 first direction of rotation D2 second direction of rotation E1 first side edge E2 second side edge F engaged from the second end of the guide groove of the guide part Force applied to projection F1 First surface F2 Second surface L Line connecting proximal end of engaging projection and proximal end of support shaft S Slide member Sa Support shaft Sa1 Base end of support shaft Sb Engagement protrusion Sb1 Engagement Proximal end of mating projection Sc Connecting part ST1, ST2, ST3, ST4 Straight part T Outer tube Ta One end of outer tube Tb Other end of outer tube P Operating part P2 Outer tube operating part W1 First wall W2 Second wall X shaft

Claims (4)

a rotating member that rotates when an operation target is operated;
a biasing member that biases the rotating member in a first rotation direction;
an operating member connected to the rotating member for rotating the rotating member in a second direction of rotation opposite to the first direction of rotation;
a guide portion that rotates in conjunction with the rotating member and has a guide groove spirally provided along the direction in which the rotating member rotates;
A driving device having a base portion provided so that the rotating member rotates relative to each other,
The base has an arcuate groove extending radially outward from the rotation center side of the rotating member, and an engaging hole serving as the center of the arc of the arcuate groove,
The base includes a support shaft that engages with the engagement hole, an engagement projection that engages with both the arcuate groove and the guide groove, and a connecting portion that connects the support shaft and the engagement projection. a slide member attached to the
the engaging protrusion of the slide member is guided along the guide groove and moves along the arc groove when the rotating member and the base rotate relative to each other;
The connecting portion extends from the base end of the engaging projection in a direction including a component perpendicular to a line connecting the base end of the engaging projection and the base end of the support shaft. extending to the proximal end of the spindle via a bend provided in the shaft. 2. The driving device according to claim 1, wherein said connecting portion extends curvedly within a plane substantially perpendicular to the rotation axis of said rotating member. The base includes a first surface facing the guide portion and a second surface opposite to the first surface to which the slide member is attached,
The second surface of the base has a first wall projecting in a direction substantially perpendicular to the second surface, and the first wall extends from at least one end of the arcuate groove. 3. The driving device according to claim 1, wherein the peripheral edge is provided so as to come into contact with the engaging projection when a force is applied to the engaging projection from the end of the guide groove. The second surface of the base has a second wall projecting in a direction substantially perpendicular to the second surface, and the second wall extends from at least one end of the arcuate groove. 4. The driving device according to claim 3, wherein a peripheral edge is provided so as to face the first wall portion with the arcuate groove interposed therebetween.

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