JP2019143312A - Drive force transmission device and shading device using the same - Google Patents

Abstract

To provide a drive force transmission device capable of selectively outputting input rotation as rotation of either one of two members with a simple configuration.SOLUTION: According to the present invention, there is provided a drive force transmission device comprising a first member, a second member, and a third member, where input rotation to the first member is output as rotation of the second member or the third member. The first member, the second member, and the third member are constituted by a sun gear member, a carrier, and an internal gear member of a planetary gear mechanism. Variation in rotational resistance applied to the second member and the third member makes output be switched between the second member and the third member.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a driving force transmission device that outputs rotation to two rotation shafts with respect to input rotation, and a shielding device using the driving force transmission device.

  Conventionally, the winding axis and the tilt axis are arranged in parallel in the head box, and the angle of the slat supported by the ladder cord is adjusted by rotating the tilt axis by operating the operating device operated by a single operation code. There is also a blind that opens and closes a slat by rotating a winding shaft. For example, in the horizontal blind of Patent Document 1, the tilt spring that supports the ladder cord is tightened with the tilt drum attached to the tilt shaft, and the tilt spring and the tilt drum rotate together and rotate the tilt spring after a predetermined amount of rotation. When the tightening due to is weakened, only the tilt drum rotates.

JP 2014-231696 A

  However, in the tilt clutch described in Patent Document 1, the tilt shaft rotates even during the lifting operation, and friction (scratch) is also generated between the tilt drum and the tilt spring. It was the cause of the increase.

  Furthermore, not only the example of the horizontal blind described above, but in various situations, there has been a problem of selectively switching the output to the two rotation axes with respect to the input rotation with a simple configuration.

  The present invention has been made in view of such circumstances, and provides a driving force transmission device capable of selectively outputting an input rotation as one of two members with a simple configuration. To do.

According to the present invention, there is provided a driving force transmission device including a first member, a second member, and a third member, wherein an input rotation to the first member is output as a rotation of the second member or the third member. The first member, the second member, and the third member are constituted by a sun gear member, a carrier, and an internal gear member of a planetary gear mechanism, and the rotational resistance applied to the second member and the third member. The driving force transmission device is configured such that the output is switched between the second member and the third member by changing.
Is provided.

  When the inventor inputs rotation to one of the sun gear member, the carrier, and the internal gear member of the planetary gear mechanism, the member having the larger rotational resistance among the other two members does not rotate, I noticed that the member with the lower rotational resistance rotates. Therefore, the rotation is input to one of the three members and the rotation is output from the other two members, so that the output is switched according to the change in the rotational resistance applied to these two members. The inventors came up with the present invention by coming up with a configuration.

  That is, according to the present invention, the rotation of two gear ratios can be selectively output with respect to one input rotation with a simple configuration of a planetary gear mechanism, so that the number of parts can be reduced and the axial direction can be saved. Space is also possible.

  Preferably, when the rotational resistance applied to the second member during the rotation of the second member is greater than the rotational resistance applied to the third member, the second member stops rotating and the third member rotates. Configured to start.

  Preferably, a rotation resistance adjusting member for adjusting a rotation resistance applied to the third member is provided, and the rotation resistance adjusting member reduces a rotation resistance applied to the third member as the second member rotates. It is configured as follows.

  Preferably, a rotation restricting member that restricts rotation of the second member by a predetermined angle or more by being engaged with the second member or a member that rotates in conjunction with the second member is provided.

  Preferably, the first member, the second member, and the third member are accommodated and a case member including the rotation restricting member is provided, and the second member or the member that rotates in conjunction with the rotation member is a circle. An engagement portion is provided at a position in a circumferential direction, and the rotation of the second member is restricted by the engagement portion engaging with the rotation restriction member during the rotation of the second member. .

  Preferably, the third member or a member that rotates in conjunction with the third member includes a cylindrical collar that rotates integrally, and the rotation resistance adjusting member is a coil spring disposed on an outer peripheral surface or an inner peripheral surface of the collar. The coil spring includes a pair of protrusions each extending in the radial direction at both ends of the coil, and the pair of protrusions are disposed so as to sandwich the rotation restricting member. The coil spring is configured to reduce the rotational resistance applied to the third member by reducing or expanding the diameter of the coil spring by pressing one of the pair of protrusions by the engaging portion.

  Preferably, the first member is the sun gear member, the second member is the carrier, and the third member is the internal gear member.

  According to the present invention, the shielding member, the operation unit for operating the shielding member, the opening / closing cord for opening / closing the shielding member, the winding shaft for winding and unwinding the opening / closing cord, and the shielding A shielding device including a tilt shaft that changes a shielding angle of the member, the driving device including a driving force transmission device that transmits the rotation of the operation unit to the winding shaft and the tilt shaft, and the driving force transmission device. Includes a first member to which rotation of the operation unit is input, a second member that outputs rotation to the tilt shaft, and a third member that outputs rotation to the take-up shaft, the first member, The said 2nd member and the said 3rd member are shielding apparatuses comprised with the sun gear member, carrier, and internal gear member of a planetary gear mechanism.

  Preferably, the driving force transmission device is configured such that an output is switched between the second member and the third member by changing a rotational resistance applied to the second member and the third member.

  Preferably, when the rotational resistance applied to the second member becomes larger than the rotational resistance applied to the third member during the rotation of the second member, the driving force transmission device stops the rotation of the second member. The third member is configured to start rotating.

  Preferably, the driving force transmission device includes a rotation restricting member that restricts rotation of the second member by a certain angle or more, and a case member that accommodates the first member, the second member, and the third member, The rotation restricting member is configured to engage with the second member or a member that rotates in conjunction with the second member, and the second member or the member that rotates in conjunction with the second member or a member that rotates in conjunction with the second member or a member that rotates in conjunction with the second member. And the case member includes a rotation resistance adjustment member that adjusts a rotation resistance applied to the third member, and the rotation resistance adjustment member is rotated with the second member. The driving force transmission device is configured to reduce the rotational resistance applied to the three members, and the engaging portion engages with the rotation restricting member while the second member rotates. Configured to regulate rotation.

  Preferably, the third member or a member that rotates in conjunction with the third member includes a cylindrical collar that rotates integrally, and the rotation resistance adjusting member is a coil spring disposed on an outer peripheral surface or an inner peripheral surface of the collar. The coil spring includes a pair of protrusions each extending in the radial direction at both ends of the coil, and the pair of protrusions are disposed so as to sandwich the rotation restricting member. The coil spring is configured to reduce the rotational resistance applied to the third member by reducing or expanding the diameter of the coil spring by pressing one of the pair of protrusions by the engaging portion.

  Preferably, the first member is the sun gear member, the second member is the carrier, and the third member is the internal gear member.

It is a front view of the horizontal blind concerning the embodiment of the present invention. It is a disassembled perspective view of the driving force transmission apparatus 10 of the horizontal blind of FIG. FIG. 3 is an exploded perspective view of the driving force transmission device 10 of FIG. 2 when viewed from a direction different from FIG. 2. FIG. 3 is an exploded perspective view of a planetary gear mechanism S of the driving force transmission device 10 of FIG. 2. FIG. 5 is an exploded perspective view of the planetary gear mechanism S of FIG. 4 when viewed from a direction different from that of FIG. 4. 6A is a perspective view showing a state in which the driving force transmission device 10 of FIG. 2 is assembled, and FIG. 6B is a perspective view of the driving force transmission device 10 when the case member 20 is removed. 7A is a side view showing a state in which the driving force transmission device 10 of FIG. 2 is assembled, and FIG. 7B is a side view of the driving force transmission device 10 when the case member 20 is removed. It is sectional drawing in the AA line of FIG. 7A and FIG. 7B of the driving force transmission apparatus 10 of FIG. It is sectional drawing in the BB line of FIG. 7A and FIG. 7B of the driving force transmission apparatus 10 of FIG. 3 is a timing chart for explaining the operation of the driving force transmission device 10 of FIG. 2. 11A to 11E are operation explanatory views of each member in the cross section taken along the line AA of FIG. 12A to 12E are operation explanatory views of the respective members in the cross section taken along line BB in FIG. FIGS. 13A to 13D are explanatory views showing the rotation operation of the slat 3 of the horizontal blind of FIG. 4 is a table showing combinations of roles of the sun gear member 30, the carrier 40, and the internal gear member 50 of the planetary gear mechanism S.

  Hereinafter, embodiments of the present invention will be described. Each feature shown in the following embodiments can be combined with each other. The invention is established independently for each feature.

(1) Description of Configuration (1-1) Overall Configuration of Horizontal Blind The horizontal blind according to the first embodiment of the present invention shown in FIG. 1 includes a plurality of ladder cords 2 (slat support cords) suspended from the head box 1. ) Supports a slat 3 as a shielding member, and a bottom rail 4 is connected to the lower end of the ladder cord 2. In the vicinity of the ladder cord 2, a plurality of lifting cords 5 as hanging cords are suspended from the head box 1. The upper end of the lifting / lowering cord 5 is wound around a winding cone 6 disposed in the head box 1, and the lower end of the lifting / lowering cord 5 supports the bottom rail 4. The winding cone 6 is provided with a square-axis-shaped through hole, and a rectangular shaft-shaped lifting shaft 7 as a winding shaft disposed over the longitudinal direction of the head box 1 passes through the through-hole. Yes. And the raising / lowering shaft 7 and the winding cone | corn 6 rotate by operation of the endless operation cord 12 as an operation part suspended from the one end side of the head box 1, and the raising / lowering cord 5 is wound up or rewound. As a result, the slats 3 are moved up and down. Here, in this embodiment, the operation cord 12 is a ball chain type. The head box 1 is also provided with a stopper device 8 that stops the lifting shaft 7 from rotating and prevents the slat 3 from being lowered due to its own weight.

  Further, the upper end of the ladder cord 2 is attached to the tilt drum 9. The tilt drum 9 has external teeth on the outer periphery thereof and meshes with a tilt gear (not shown) provided with a prismatic through hole. The angled tilt shaft 11 passes through the through hole. When the tilt drum 9 rotates in accordance with the rotation of the tilt shaft 11, the front and rear cords of the ladder cord 2 operate in directions opposite to each other, thereby adjusting the shielding angle of each slat 3 in the same phase. In the present embodiment, in addition to the lifting shaft 7, the tilt shaft 11 can also be rotated by operating the operation cord 12.

  In order to enable such an operation, the horizontal blind according to this embodiment includes a driving force transmission device 10 that selectively transmits the movement of the operation cord 12 to the lift shaft 7 and the tilt shaft 11 as rotation. In the present embodiment, the driving force transmission device 10 is disposed at one end of the head box 1. Below, the structure of the driving force transmission apparatus 10 is demonstrated using FIGS. In the following, regarding the direction of the driving force transmission device 10, the input side, that is, the operation code 12 side is defined as the input side, and the output side, that is, the side where the lifting shaft 7 and the tilt shaft 11 are connected is defined as the output side. Further, the driving force transmission device 10 of the present embodiment is attached to the horizontal blind so that the upper side of each drawing is the indoor side and the lower side of each drawing is the outdoor side (see FIGS. 2 and 3). Therefore, in FIG. 2, the left rear side of the paper is the lower side, and the right front side of the paper is the upper side. Further, in FIG. 3, the right back side of the drawing is the lower side, and the left front side of the drawing is the upper side. In the following description, the term “upper and lower” means not the upper and lower sides in the drawing but the upper and lower when attached to a horizontal blind unless otherwise specified.

(1-2) Configuration of Driving Force Transmission Device 10 As shown in FIGS. 2 and 3, the driving force transmission device 10 includes a case member 20, a planetary gear mechanism S, a first output member 13, and a second output. The member 14, the transmission member 15, the rotation amount defining member 16, the switching member 17, and the rotation resistance adjusting member D are accommodated. Here, the case member 20 includes an input side case 21, an input side intermediate case 22, an output side intermediate case 23, and an output side case 24. The planetary gear mechanism S includes a sun gear member 30 as a first member, a carrier 40 as a second member, an internal gear member 50 as a third member, and a planetary gear member 60. The rotation resistance adjusting member D includes a coil spring 70 and a collar 80. In the present embodiment, the coil spring 70 and the collar 80 are made of metal, and the other members are made of resin.

  The driving force transmission device 10 outputs the rotation input to the sun gear member 30 as the rotation of the first output member 13 or the rotation of the second output member 14. An operation cord 12 is wound around a pulley 31 formed on the sun gear member 30. By operating the operation cord 12, the tilt shaft 11 or the second output member connected to the first output member 13 is operated. The elevating shaft 7 connected to 14 rotates. Hereinafter, each member will be described.

<Case member 20>
2 and 3, the case member 20 is arranged so that the input side case 21, the input side intermediate case 22, the output side intermediate case 23, and the output side case 24 are arranged in order from the input side. Each member is accommodated. Each case includes wall surfaces 21w, 22w, 23w, and 24w perpendicular to the input / output direction. Each of these wall surfaces 21w to 24w has a rectangular shape on the outdoor side and a substantially semicircular shape on the indoor side in front view. In addition, various engagement claws, engagement grooves, convex portions, concave portions, and the like for engaging and fixing the cases are provided between these cases. However, the arrangement and configuration of these cases are known configurations. The description will be omitted as appropriate. Moreover, as shown in FIG.2 and FIG.3, each member is appropriately lightly cut.

  The input side case 21 is a member constituting the input side end face of the driving force transmission device 10. A support shaft 21a extending toward the output side is formed at a position on the indoor side of the wall surface 21w of the input side case 21 and at a substantially central position in the vertical direction, and is configured to pivotally support the sun gear member 30. . A cylindrical recess 21b is formed around the support shaft 21a.

  The input side intermediate case 22 is arranged so as to hold the sun gear member 30 together with the input side case 21. A through hole 22 a that penetrates the sun gear portion 30 g of the sun gear member 30 is formed at a substantially central position on the indoor side of the wall surface 22 w of the input side intermediate case 22. And the accommodation space R1 which accommodates the operation cord 12 wound around the pulley 31 of the sun gear member 30 and the pulley 31 is formed by the recess 21b and the wall surface 22w of the input side case 21. The accommodation space R <b> 1 is partially cut out to draw out the operation cord 12. Further, a cylindrical indoor recess 22c is formed at the output side of the input intermediate case 22, and a rectangular outdoor recess 22d is formed at the outdoor position. Furthermore, a support shaft 22e that extends to the output side and supports the second output member 14 is formed at a position on the outdoor side and at a substantially central position in the vertical direction.

  The output side intermediate case 23, together with the input side intermediate case 22, is arranged to hold the planetary gear mechanism S excluding the sun gear member 30 and the second output member 14. A through hole 23 a through which the carrier transmission gear portion 40 g of the carrier 40 passes is formed at a substantially central position on the indoor side of the wall surface 23 w of the output side intermediate case 23. In addition, a through hole 23 b that penetrates the second output shaft 14 o of the second output member 14 is formed at a position slightly above the outdoor side of the wall surface 23 w of the output-side intermediate case 23. In addition, the output-side intermediate case 23 has a cylindrical indoor-side concave portion 23c at the input-side indoor side position of the wall surface 23w, and the cylindrical outdoor side continuous with the indoor-side concave portion 23c at the outdoor-side position. It has a recess 23d. Then, the carrier 40, the internal gear member 50, the planetary gear member 60, and the indoor side concave portion 22c and the outdoor side concave portion 22d of the input side intermediate case 22 and the indoor side concave portion 23c and the outdoor side concave portion 23d of the output side intermediate case 23 An accommodation space R2 for accommodating the gear portion 14g of the second output member 14 is formed.

  On the output side of the wall surface 23w of the output side intermediate case 23, a cylindrical portion 23e that protrudes in a cylindrical shape toward the output side is formed around the through hole 23b. Further, a case protrusion 23p as a rotation restricting member extending inward in the radial direction is formed on the upper inner surface of the cylindrical portion 23e (see FIG. 9). In addition, a support shaft 23f that pivotally supports the transmission member 15 is formed at a position on the output side of the wall surface 23w and on the lower side of the outdoor side. A support shaft 23h that pivotally supports the first output member 13 is formed at an intermediate position between the through hole 23a and the support shaft 23f.

The output side case 24 is arranged to hold the first output member 13, the transmission member 15, the rotation amount regulating member 16, the switching member 17, and the rotation resistance adjusting member D together with the output side intermediate case 23. A through hole 24 a that allows the first output member 13 o of the first output member 13 to pass through is formed at a position slightly below the center of the wall surface 24 w of the output side case 24. In addition, a through hole 24b that penetrates the second output shaft 14o of the second output member 14 is formed at a position slightly above the outdoor side of the wall surface 24w. In addition, the output side case 24 has a cylindrical indoor concave portion 24c at the input side indoor side position of the wall surface 24w, and a cylindrical central concave portion 24d at a position slightly below the outdoor side. Yes. Further, the output side case 24 has a lower chamber outer recess 24e below the central recess 24d, and an upper chamber outer recess 24f above the lower chamber outer recess 24e.
The first output member 13 is constituted by the wall surface 23w and the cylindrical portion 23e of the output side intermediate case 23, and the indoor side concave portion 24c, the central concave portion 24d, the lower outdoor side concave portion 24e, and the upper outdoor side concave portion 24f of the output side case 24. A housing space R3 for housing the gear portion 13g, the gear portion 14g of the second output member 14, the transmission member 15, the rotation amount regulating member 16, and the rotation resistance adjusting member D is formed.

<Sun gear member 30>
As shown in FIGS. 4 and 5, which are exploded perspective views of the planetary gear mechanism S, the sun gear member 30 is, in order from the input side, a pulley 31, a disk portion 32 having a larger diameter than the pulley 31, and the pulley 31. A small-diameter sun gear 30g. Gear teeth 30t are formed on the outer periphery of the sun gear portion 30g. The sun gear portion 30g meshes with each of the four planetary gear members 60. The operation cord 12 is wound around the pulley 31, and when the operation cord 12 is operated, the sun gear member 30 rotates and the rotation is transmitted to the planetary gear member 60.

<Carrier 40>
The carrier 40 includes an input side carrier member 41 and an output side carrier member 42. The input-side carrier member 41 includes a disk part 43 and four support columns 44 extending from the disk part 43 to the output side. A through hole 41 a is formed in the center of the disk portion 43 so as to penetrate the sun gear portion 30 g of the sun gear member 30. Further, as shown in FIG. 5, the four support columns 44 are provided at equal intervals in the circumferential direction, and a protrusion 44 a is provided at the tip (output side end) of each support column 44. In addition, four fitting holes 43 a are formed in the disk portion 43 alternately with the four support columns 44.

  The output side carrier member 42 includes a disk part 45, a cylindrical part 46 having a smaller diameter than the disk part 45, and a carrier transmission gear part 40g having substantially the same outer diameter as the cylindrical part 46 in this order from the input side. The output carrier member 42 includes four planetary gear holding shafts 48 that extend from the disk portion 45 to the input side and pivotally support the planetary gear member 60. The four planetary gear holding shafts 48 are provided at equal intervals in the circumferential direction, and are provided on the disk portion 43 of the input-side carrier member 41 at the tips (input side ends) of the planetary gear holding shafts 48. Protrusions 48a that fit into the four fitting holes 43a are provided (see FIG. 4). In the disk portion 45, four fitting holes 45 a are formed alternately with the four planetary gear holding shafts 48. The four fitting holes 45a are fitted with protrusions 44a provided on the support pillars 44 of the input-side carrier member 41. Further, carrier output gear teeth 40t are formed on the outer periphery of the carrier transmission gear portion 40g, and engage with the gear portion 13g of the first output member 13 (see FIG. 9).

<Internal gear member 50>
The internal gear member 50 includes, in order from the input side, a cylindrical thin cylindrical portion 51 and a cylindrical internal gear member transmission gear portion 50g. Inner teeth 51t are formed on the inner surface of the thin-walled cylindrical portion 51 in the circumferential direction to form an inner gear portion 51g that meshes with the four planetary gear members 60. The internal gear member transmission gear portion 50g has an inner diameter that allows the cylindrical portion 46 of the output carrier member 42 and the carrier transmission gear portion 40g to be inserted. When assembled, the cylindrical portion 46 of the carrier 40 is rotatably held by the inner wall surface 50a of the internal gear member transmission gear portion 50g.

<Planetary gear member 60>
The planetary gear member 60 has gear teeth 60t on the outer periphery thereof, and four planetary gear members 60 are provided in this embodiment. Each planetary gear member 60 is passed through the through-hole 62 and the planetary gear holding shaft 48 of the output side carrier member 42 is passed through, and is rotatably held by the planetary gear holding shaft 48. The planetary gear member 60 meshes with the sun gear portion 30g of the sun gear member 30 and the internal gear portion 51g of the internal gear member 50.

  The planetary gear mechanism S is configured by the sun gear member 30, the carrier 40, the internal gear member 50, and the planetary gear member 60 configured as described above. In the planetary gear mechanism S of the present embodiment, the rotation resistance applied to the carrier 40 (carrier transmission gear portion 40g) and the internal gear member 50 (internal gear member transmission gear portion) with respect to the rotation of the sun gear member 30 due to the operation of the operation cord 12. 50g), either one of the carrier 40 or the internal gear member 50 is rotated in accordance with the change in rotational resistance applied thereto. Specifically, the carrier 40 rotates when the rotational resistance applied to the internal gear member 50 is large relative to the rotational resistance applied to the carrier 40, and the internal gear member 50 rotates when the rotational resistance applied to the internal gear member 50 is small. It has become.

<First output member 13>
The first output member 13 is a member that outputs the rotation of the carrier 40 to the outside, and in order from the input side, a gear portion 13g having gear teeth 13t on the outer periphery, and a cylindrical first output member 13o having a smaller diameter. With. In addition, a square hole for connecting to the prismatic tilt shaft 11 is formed at the tip of the first output member 13o.

<Second output member 14>
The second output member 14 is a member that outputs the rotation of the internal gear member 50 to the outside. In order from the input side, a columnar gear portion 14g having gear teeth 14t on the outer periphery, and a columnar gear portion having a smaller diameter than this. And a second output shaft 14o. The gear portion 14 g has a cylindrical recess 14 c that opens toward the input side, and is configured to be supported by the support shaft 22 e of the input side intermediate case 22. Further, the tip of the second output shaft 14 o has a prismatic shape in order to connect to the lifting shaft 7. In addition, engagement grooves 14d that engage with the engagement protrusions 81 of the collar 80 are formed at two opposing portions of the joint portion between the output side surface of the gear portion 14g and the side surface of the cylindrical portion 14b.

<Transmission member 15>
The transmission member 15 is a cylindrical member that is pivotally supported by the support shaft 23f of the output intermediate case 23 and extends in the input / output direction, and gear teeth 15t are formed on the outer periphery. The length of the transmission member 15 in the input / output direction is substantially the same as the sum of the length of the gear portion 13g of the first output member 13 in the input / output direction and the length of the rotation amount regulating member 16 in the input / output direction.

<Rotation amount regulating member 16>
The rotation amount defining member 16 has a thin cylindrical shape, and includes gear teeth 16t and protrusions 16b. The gear teeth 16t are provided on the outer periphery of the rotation amount defining member 16 in the input / output direction. On the inner surface of the rotation amount regulating member 16, there are provided projecting portions 16b projecting radially inward at two opposite locations in the circumferential direction. Further, the output side end portion of the rotation amount regulating member 16 has a narrow diameter, and a through hole 16c through which the second output shaft 14o of the second output member 14 passes is formed.

<Switching member 17>
The switching member 17 includes a thin disk portion 17a and a switching member protrusion 17b that protrudes toward the input side at one radial outer periphery of the input side surface of the disk portion 17a. A through hole 17c is formed in the center of the disk portion 17a to allow the second output shaft 14o of the second output member 14 to pass therethrough. In addition, from the output side surface of the disk portion 17a, projecting portions 17d projecting toward the output side are formed at two opposite locations in the circumferential direction. The switching member 17 is a member that rotates in conjunction with the second member (carrier 40), and the switching member protrusion 17b corresponds to an “engagement portion” in the present invention.

<Coil spring 70, collar 80>
The coil spring 70 and the collar 80 are used as a rotation resistance adjusting member D that adjusts the rotation resistance applied to the second output member 14 and the internal gear member 50 that meshes with the second output member 14. The coil spring 70 is a coil spring projection 71 in which both ends of a metal wire wound in a cylindrical shape extend radially inward. The coil spring 70 is disposed on the outer periphery of the collar 80 as shown in FIG. Then, as shown in FIG. 9, the pair of coil spring protrusions 71 are arranged so as to sandwich the case protrusion 23p formed on the case member 20 (the output side intermediate case 23).

  As shown in FIGS. 2 and 3, the collar 80 is a thin ring-shaped member and is made of metal. The collar 80 includes engaging protrusions 81 at two opposite positions in the circumferential direction on the input side end. Then, the engagement projection 81 is engaged with the engagement groove 14 d of the second output member 14, so that the collar 80 is not rotatable relative to the second output member 14. A coil spring 70 is disposed outside the collar 80. The inner diameter of the coil spring 70 before assembly is slightly smaller than the outer diameter of the collar 80, and the coil spring 70 is arranged with the collar 80 tightened. With such a configuration, the collar 80 attempts to rotate integrally with the collar 80 when the diameter of the coil spring 70 is reduced, and can rotate relative to the coil spring 70 when the diameter of the coil spring 70 is increased.

  By assembling the above members, the driving force transmission device 10 shown in FIGS. 6A and 7A is configured. In this state, the meshing relationship of each member is as shown in FIG. 6B, FIG. 7B, FIG. 8, and FIG. That is, the carrier transmission gear portion 40g of the carrier 40 meshes with the gear portion 13g of the first output member 13, the gear portion 13g of the first output member 13 meshes with the transmission member 15, and the transmission member 15 defines the rotation amount. Engage with member 16. The internal gear member transmission gear portion 50g meshes with the gear portion 14g of the second output member 14. The transmission member 15 meshes with the gear portion 13g of the first output member 13 and the rotation amount regulating member 16 at positions shifted in the input / output direction. Here, the gear portion 13g of the first output member 13 and the rotation amount regulating member 16 do not mesh with each other. With this configuration, the transmission member 15 transmits the rotation of the first output member 13 to the rotation amount defining member 16 as rotation in the same direction as the first output member 13.

  In the assembled state, as shown in FIG. 8, the protruding portion 16 b of the rotation amount regulating member 16 and the protruding portion 17 d of the switching member 17 are arranged to be engageable. 9, the case protrusion 23p of the case member 20 (output-side intermediate case 23), the switching member protrusion 17b of the switching member 17, and the coil spring protrusion 71 of the coil spring 70 are arranged to be engageable. In the present embodiment, the case protrusion 23p restricts the rotation of the switching member protrusion 17b beyond a certain angle. Therefore, the carrier 40 connected to the switching member protrusion 17b via the rotation amount defining member 16, the transmission member 15, and the first output member 13 is also prevented from rotating more than a certain angle.

(2) Description of Operation (2-1) Operation of Driving Force Transmission Device 10 Next, regarding the operation of the driving force transmission device 10 configured as described above, the timing chart of FIG. 10 and A- of FIGS. 7A and 7B will be described. It demonstrates using the explanatory drawing of FIG. 11A-FIG. 11E and FIG. 12A-FIG. 12D which show the operation | movement of each member in A cross section and BB cross section.

<Aspect (i)>
First, in the initial state, the rotation amount defining member 16 and the switching member 17 in the AA cross-sectional view of FIG. 8 are in the positional relationship shown in FIG. 11A, that is, the protrusion 16b of the rotation amount defining member 16 is counterclockwise. It is assumed that there is a positional relationship that comes into contact with the protrusion 17d of the switching member 17 as soon as it rotates. In addition, the switching member 17, the coil spring 70, and the case protrusion 23p of the output side intermediate case 23 in the BB cross-sectional view of FIG. 9 are in the positional relationship shown in FIG. It is assumed that there is a positional relationship that comes into contact with the case protrusion 23p via the coil spring protrusion 71 as soon as it rotates clockwise.

  When the operation cord 12 is operated in this state and the sun gear member 30 starts to rotate counterclockwise (CCW rotation), the planetary gear member 60 that meshes with the sun gear member 30 is rotated clockwise in the planetary gear mechanism S. Rotate (CW rotation). Then, the carrier 40 holding the planetary gear member 60 tries to rotate counterclockwise, and the internal gear member 50 that meshes with the planetary gear member 60 tries to rotate clockwise. That is, as the output of the planetary gear mechanism S, the carrier transmission gear portion 40g attempts to rotate counterclockwise, and the internal gear member transmission gear portion 50g attempts to rotate clockwise.

<Aspect (i) to Aspect (ii)>
By the way, the second output member 14 (gear portion 14g) that meshes with the internal gear member transmission gear portion 50g tries to rotate counterclockwise, and the collar 80 engaged therewith and the coil spring 70 wound around this are also included. Try to rotate counterclockwise. However, as shown in FIG. 12A, when the coil spring 70 is slightly rotated, the coil spring protrusion 71 comes into contact with the case protrusion 23p of the case member 20, and cannot be rotated any further. At this time, since the coil spring protrusion 71 is pressed in the direction in which the coil spring 70 is reduced in diameter, the collar 80 cannot be relatively rotated in the coil spring 70.

  As a result, in phase (i) to phase (ii), the internal gear member 50 cannot be rotated and is in a fixed state, and thus the carrier 40 starts to rotate counterclockwise. Accordingly, the first output member 13 (gear portion 13g) that meshes with the carrier transmission gear portion 40g rotates clockwise, and the transmission member 15 that meshes with the first output member 13 rotates counterclockwise. The rotation amount defining member 16 that meshes with the transmission member 15 starts to rotate clockwise (see FIG. 11B).

<Aspect (ii)>
When the sun gear member 30 further rotates and the rotation amount defining member 16 continues to rotate clockwise, the pair of protrusions 16b of the rotation amount defining member 16 are respectively paired with the pair of protrusions of the switching member 17, as shown in FIG. 11C. Engage with the portion 17d.

<Aspect (ii) to Aspect (iii)>
When the sun gear member 30 further rotates in the state (ii), the switching member 17 also starts to rotate clockwise by the clockwise rotation of the rotation amount defining member 16 (see FIG. 11D). At this time, the switching member protrusion 17b of the switching member 17 rotates on the outer periphery of the coil spring 70 and on the inner side of the tubular portion 23e, as shown in FIGS. 12B and 12C.

<Aspect (iii)>
When the sun gear member 30 further rotates and the switching member 17 continues to rotate clockwise, as shown in FIG. 12D, the switching member protrusion 17b of the switching member 17 sandwiches the coil spring protrusion 71 and the case protrusion of the case member 20 23p is contacted and rotation is restricted. The positions of the protrusion 16b of the rotation amount regulating member 16 and the switching member protrusion 17b of the switching member 17 at this time are as shown in FIG. 11E. As a result, the switching member 17 and the rotation amount defining member 16, the transmission member 15, the first output member 13, and the carrier 40 that have been rotated in conjunction with these become unrotatable. At this time, the switching member protrusion 17 b presses the coil spring protrusion 71 to expand the diameter of the coil spring 70. As a result, the collar 80, which has not been able to rotate so far, can be rotated inside the coil spring 70.

<Aspect (iii) to Aspect (iv)>
When the sun gear member 30 further rotates in the state of (iii), the carrier 40 becomes non-rotatable, while the collar 80 becomes rotatable, so that the internal gear member 50 rotates clockwise and the second output member 14 The collar 80 starts to rotate counterclockwise (see FIG. 12E).

<Aspect (iv)>
When the operation of the operation cord 12 is stopped and the rotation of the sun gear member 30 is stopped, the rotation of the carrier 40 and the second output member 14 is stopped.

  From the above, in this embodiment, the driving force transmission device 10 rotates clockwise around the tilt shaft 11 connected thereto by the clockwise rotation of the first output member 13 during the phases (i) to (iii). Transmit the rotation of (tilt output). During this time, the second output member 14 does not rotate and does not transmit rotation to the elevating shaft 7. On the other hand, the driving force transmission device 10 transmits the counterclockwise rotation to the lifting shaft 7 connected thereto by the counterclockwise rotation of the second output member 14 during the phases (iii) to (iv). (Lifting output). During this time, the first output member 13 does not rotate and does not transmit rotation to the tilt shaft 11.

(2-2) Operation of Horizontal Blind Next, the operation of the horizontal blind equipped with the driving force transmission device 10 will be described with reference to FIGS. 13A to 13D. 13A to 13D are side views of the horizontal blind according to the present embodiment as viewed from the right side of FIG. 1, and in FIGS. 13A to 13D, the left side is the indoor side. The direction of the driving force transmission device 10 is the input side on the front side of the paper and the output side on the back side of the paper. In the following, from the state in which the slat 3 shown in FIG. 13A is fully closed, the slat 3 rotates to go through the horizontal state shown in FIG. 13B to the reverse fully closed state shown in FIG. 13C, and then as shown in FIG. 13D. I will explain when going up. In order to change from the reverse fully closed state to the fully closed state while lowering the slat 3, the following operation may be performed in reverse.

<Raising and turning of slat 3>
When the operation cord 12 is operated in the direction indicated by the arrow in FIG. 13A when the slat 3 is in the fully closed state (see FIG. 13A), the sun gear member 30 starts to rotate counterclockwise. At this time, the driving force transmission device 10 is in the state (i) shown in FIGS. 10, 11A, and 12A, and the first output member 13 and the tilt shaft 11 connected to the first output member 13 by the driving force transmission device 10. Starts rotating clockwise. Then, the tilt drum 9 rotates counterclockwise via a tilt gear (not shown), and the slat 3 starts to rotate. On the other hand, the second output member 14 and the lifting shaft 7 connected to the second output member 14 cannot be rotated by the driving force transmission device 10, the winding cone 6 does not rotate, and the lifting cord 5 is not wound. No action occurs. FIG. 13B is a diagram showing the middle of the rotation of the slat 3, and the driving force transmission device 10 transitions from the aspect (i) to the aspect (iii) by continuing the operation of the operation cord 12.

<Rotation stop of slat 3>
When the operation of the operation code 12 is further continued, the slat 3 enters the reverse fully closed state shown in FIG. 13C, and the first output member 13 of the driving force transmission device 10 becomes non-rotatable at substantially the same timing as this (phase (iii) )), And the rotation of the tilt shaft 11 stops.

<Rise of slat 3>
Thereafter, when the operation of the operation code 12 is further continued, the driving force transmission device 10 enters a state (iii) to a state (iv), and the elevating shaft 7 starts to rotate counterclockwise. Then, the winding cone 6 rotates counterclockwise, whereby the lifting / lowering cord 5 is wound into the head box 1 and the slat 3 (bottom rail 4) is lifted as shown in FIG. 13D. .

<Stop of slat 3>
Lastly, when the operation of the operation cord 12 is stopped, the rotation of the elevating shaft 7 is also stopped, and the raising of the slat 3 is stopped.

  The planetary gear mechanism S used in the driving force transmission device 10 is composed of four members: a sun gear member 30, a carrier 40, an internal gear member 50, and a planetary gear member 60. Of these, the planetary gear member 60 is included. The three members except for can be arbitrarily set as to which member the rotation is input, which member is rotated in the initial stage, and which member is rotated thereafter. That is, in the above-described embodiment, the operation force by the operation code 12 is input to the sun gear member 30, and the tilt shaft 11 is moved via the first output member 13 that rotates in conjunction with the carrier 40 in the initial stage. After that, the elevating shaft 7 is rotated via the second output member 14 that rotates in conjunction with the rotation of the internal gear member 50, but these three roles are arbitrary. In other words, as shown in FIG. 13, among the sun gear member 30, the carrier 40, and the internal gear member 50, a member connected to the operation cord 12 (input), a member connected to the tilt shaft 11 (first output), and The member connected to the lifting shaft 7 (second output) can be arbitrarily replaced. These combinations are selected depending on how to set the gear ratio of the rotation at the initial stage and the gear ratio of the subsequent rotation.

  Note that the direction of the output rotation relative to the input rotation in one direction to the driving force transmission device 10 can be changed by appropriately adding a gear or the like. Therefore, the operation direction of the operation cord 12 and the rotation direction and elevation direction of the slat 3 can be arbitrarily set.

(3) Effects The following effects can be obtained with the driving force transmission device 10 and the horizontal blind as described above.
(A) The sun gear member 30 of the planetary gear mechanism S is configured to rotate by operation of the operation cord 12, the carrier 40 is connected to the tilt shaft 11 via the first output member 13, and the internal gear member 50 is connected to the second gear member 50. By connecting to the lifting shaft 7 via the output member 14, it is possible to selectively output rotation to the two shafts (tilt shaft 11 and lifting shaft 7) for the same input rotation. With such a configuration, the rotation of the two gear ratios can be selectively output with respect to one input rotation by the simple configuration of the planetary gear mechanism S.
(B) As the carrier 40 rotates, the switching member protrusion 17b of the switching member 17 presses the coil spring protrusion 71 to increase the diameter of the coil spring 70, thereby reducing the rotational resistance to the internal gear member 50. it can. At the same time, the switching member protrusion 17b engages with the case protrusion 23p of the case member 20, whereby the rotation of the carrier 40 can be restricted (rotational resistance can be increased to infinity). With such a configuration, the member that rotates between the carrier 40 and the internal gear member 50 can be switched by the engagement relationship of the members on substantially the same circle.
(C) The rotating member can be switched among the switching member protrusion 17b of the switching member 17, the carrier 40, and the internal gear member 50.
(D) Since the rotation is input to one of the planetary gear mechanisms S and the rotation is output from the other two, play (idling) does not occur when the output is switched.
(E) By appropriately selecting the roles of the sun gear member 30, the carrier 40, and the internal gear member 50 of the planetary gear mechanism S from the combinations shown in FIG. 13, the first axis (tilt) in the initial motion (input rotation start) It is possible to arbitrarily set the speed ratio of the output to the shaft 11) and the speed ratio of the output to the second shaft (elevating shaft 7) thereafter.
(F) By using the driving force transmission device 10 configured as described above for the horizontal blind, the slat 3 is rotated only immediately after the operation of the operation cord 12 is started, and the lifting / lowering operation is performed after the slat 3 is rotated. It is possible.
(G) Since the rotation amount and the rotation phase of the first output member 13 are determined only by the positional relationship between the switching member projection 17b of the switching member 17 and the case projection 23p of the case member 20, regardless of the state of the second output member 14. , It can always be rotated within a certain range (a certain angle). By applying this configuration to a horizontal blind and connecting the first output member 13 and the tilt shaft 11, and the second output member 14 and the lifting shaft 7, the phase of the tilt shaft 11 when the lifting operation starts (the slat 3). Angle) can be made constant.
(H) The effect of (G) is also effective when the present application is applied to a horizontal blind in which the tilt shaft 11 and the lifting shaft 7 can be rotated either electrically or manually. That is, in the case of a configuration in which the sun gear member 30 can be rotated both electrically and manually, if the angle of the slat 3 is randomly determined during manual operation, the position of the slat 3 cannot be specified during the next electric operation, Unless a means for angle detection is provided, rotation of the tilt shaft 11 may be insufficient or excessive. However, in the configuration of the present application, since the rotation amount and the rotation phase of the first output member 13 are always in a certain range, the tilt shaft 11 can be appropriately rotated.

In addition, this invention can be implemented also with the following aspects.
-Although embodiment mentioned above applied the driving force transmission apparatus 10 to the horizontal blind, it is also possible to apply to shielding apparatuses other than a horizontal blind, for example, a vertical blind.
In the above embodiment, the rotation resistance adjusting member D is configured such that the coil spring 70 is disposed on the outer peripheral surface of the collar 80, the coil spring 70 becomes non-rotatable when the diameter is reduced, and can be rotated when the diameter is increased. It is the composition which becomes. However, it is also possible to use a configuration in which the coil spring 70 is disposed on the inner peripheral surface of the collar 80 and becomes non-rotatable when the diameter of the coil spring 70 is increased and becomes rotatable when the diameter is reduced.
In the above embodiment, the driving force transmission device 10 reduces the rotational resistance to the internal gear member 50 and the rotation of the carrier 40 by the rotation resistance adjusting member D (coil spring 70) and the case protrusion 23p that is a rotation restricting member. The rotation of the carrier 40 and the internal gear member 50 is switched. However, it is also possible to adopt a configuration in which these configurations are not provided, and the rotation is switched by detecting a change in rotational resistance applied to the output destinations of the carrier 40 and the internal gear member 50 (that is, outside the driving force transmission device 10). is there. For example, when the driving force transmission device 10 is applied to a horizontal blind, when the rotation of the tilt shaft 11 is stopped by an appropriate configuration of the rotation of the slat 3 or by a stop by some obstacle, the rotation of the carrier 40 connected thereto is rotated. Therefore, the rotation of the internal gear member 50 is started as a trigger, and the lifting shaft 7 connected thereto is started to start the lifting operation. Is possible.

1: Head box 2: Ladder cord 3: Slat 4: Bottom rail 5: Lifting cord 6: Winding cone 7: Lifting shaft 8: Stopper device 9: Tilt drum 10: Driving force transmission device 11: Tilt shaft 12: Operation cord 13: 1st output member 13g: Gear part 13o: 1st output member 13t: Gear tooth 14: 2nd output member 14b: Cylindrical part 14c: Recessed part 14d: Engaging groove 14g: Gear part 14o: 2nd output shaft 14t: Gear tooth 15: Transmission member 15t: Gear tooth 16: Rotation amount regulating member 16b: Protruding portion 16c: Through hole 16t: Gear tooth 17: Switching member 17a: Disk portion 17b: Switching member protrusion 17c: Through hole 17d: Protruding portion 20 : Case member 21: Input side case 21a: Support shaft 21b: Recess 21w: Wall surface 22: Input side intermediate case 22a: Through hole 22c: Indoor Recess 22d: Outdoor recess 22e: Support shaft 22w: Wall surface 23: Output side intermediate case 23a: Through hole 23b: Through hole 23c: Indoor recess 23d: Outdoor recess 23e: Cylindrical part 23f: Support shaft 23h: Support shaft 23p: Case protrusion 23w: Wall surface 24: Output side case 24a: Through hole 24b: Through hole 24c: Indoor side concave portion 24d: Central concave portion 24e: Lower outdoor portion concave portion 24f: Upper outdoor portion concave portion 24w: Wall surface 30: Sun gear member 30g : Sun gear part 30t: gear tooth 31: pulley 32: disk part 40: carrier 40g: carrier transmission gear part 40t: carrier output gear tooth 41: input side carrier member 41a: through hole 42: output side carrier member 43: disk part 43a: fitting hole 44: support column 44a: protrusion 45: disk part 45a: fitting hole 46: cylindrical part 48: planet Car carrier shaft 48a: projection 50: inner gear member 50a: inner wall surface 50 g: internal gear member transmission gear portion 51: thin-walled cylindrical portion 51 g: internal gear unit 51t: internal teeth 60: planetary gear member 60t: gear teeth 60t
62: Through-hole 70: Coil spring 71: Coil spring protrusion 80: Collar 81: Engagement protrusion D: Rotation resistance adjusting member R1: Storage space R2: Storage space R3: Storage space S: Planetary gear mechanism

Claims (13)

A driving force transmission device comprising a first member, a second member, and a third member, wherein an input rotation to the first member is output as a rotation of the second member or the third member,
The first member, the second member, and the third member are constituted by a sun gear member, a carrier, and an internal gear member of a planetary gear mechanism,
A driving force transmission device configured to switch an output between the second member and the third member by changing a rotational resistance applied to the second member and the third member.   When the rotational resistance applied to the second member during the rotation of the second member becomes larger than the rotational resistance applied to the third member, the second member stops rotating and the third member starts rotating. The driving force transmission device according to claim 1 configured. A rotation resistance adjusting member for adjusting a rotation resistance applied to the third member;
The driving force transmission device according to claim 1, wherein the rotation resistance adjusting member is configured to reduce a rotation resistance applied to the third member as the second member rotates.   The driving force transmission device according to claim 3, further comprising a rotation regulating member that regulates rotation of the second member by a predetermined angle or more by engaging with the second member or a member that rotates in conjunction with the second member. The first member, the second member, and the third member are accommodated, and a case member including the rotation restricting member is provided.
The second member or a member that rotates in conjunction with the second member includes an engaging portion at a position in a circumferential direction,
The driving force transmission device according to claim 4, wherein the engagement portion is configured to regulate rotation of the second member by engaging the rotation regulating member during rotation of the second member. The third member or a member that rotates in conjunction with the third member includes a cylindrical collar that rotates integrally,
The rotation resistance adjusting member includes a coil spring disposed on an outer peripheral surface or an inner peripheral surface of the collar,
The coil spring includes a pair of protrusions each extending in the radial direction at both ends of the coil, and the pair of protrusions are disposed so as to sandwich the rotation restricting member,
The rotation resistance adjusting member is configured to reduce rotation resistance applied to the third member by reducing or increasing the diameter of the coil spring by pressing one of the pair of protrusions by the engaging portion. The driving force transmission device according to claim 5, which is configured.   The driving force transmission device according to claim 1, wherein the first member is the sun gear member, the second member is the carrier, and the third member is the internal gear member. A shielding member; an operating portion for operating the shielding member; an opening / closing cord for opening / closing the shielding member; a winding shaft for winding and unwinding the opening / closing cord; and a tilt for changing a shielding angle of the shielding member. A shielding device comprising a shaft,
A driving force transmission device that transmits the rotation of the operation unit to the winding shaft and the tilt shaft;
The driving force transmission device includes a first member to which rotation of the operation unit is input, a second member that outputs rotation to the tilt shaft, and a third member that outputs rotation to the winding shaft,
The said 1st member, the said 2nd member, and the said 3rd member are shielding apparatuses comprised with the sun gear member of a planetary gear mechanism, a carrier, and the internal gear member.   9. The drive force transmission device according to claim 8, wherein an output is switched between the second member and the third member by changing a rotational resistance applied to the second member and the third member. The shielding apparatus as described.   When the rotational resistance applied to the second member becomes larger than the rotational resistance applied to the third member during the rotation of the second member, the driving force transmission device stops the rotation of the second member and The shielding device of claim 9, wherein the member is configured to initiate rotation. The driving force transmission device includes a rotation restricting member that restricts rotation of the second member by a certain angle or more, and a case member that houses the first member, the second member, and the third member,
The rotation restricting member is configured to engage with the second member or a member that rotates in conjunction with the second member, and the second member or the member that rotates in conjunction with the second member or a member that rotates in conjunction with the second member or Has an engaging part,
The case member includes a rotation resistance adjustment member that adjusts a rotation resistance applied to the third member, and the rotation resistance adjustment member reduces a rotation resistance applied to the third member as the second member rotates. It is configured as
The said driving force transmission apparatus is comprised so that rotation of the said 2nd member may be controlled because the said engaging part engages with the said rotation control member during rotation of the said 2nd member. The driving force transmission device according to any one of 10. The third member or a member that rotates in conjunction with the third member includes a cylindrical collar that rotates integrally,
The rotation resistance adjusting member includes a coil spring disposed on an outer peripheral surface or an inner peripheral surface of the collar,
The coil spring includes a pair of protrusions each extending in the radial direction at both ends of the coil, and the pair of protrusions are disposed so as to sandwich the rotation restricting member,
The rotation resistance adjusting member is configured to reduce rotation resistance applied to the third member by reducing or increasing the diameter of the coil spring by pressing one of the pair of protrusions by the engaging portion. The driving force transmission device according to claim 11 configured.   The driving force transmission device according to any one of claims 8 to 12, wherein the first member is the sun gear member, the second member is the carrier, and the third member is the internal gear member.