Seat member moving device

Abstract

It is possible to provide a seat member moving device which has a smaller number of components and is lighter in weight than a conventional seat member moving device.SOLUTION: A sheet member moving device 10 that moves a sheet member 2 with respect to a placement table 9 includes a support disk 14 that supports the sheet member 2, a base 12 that movably supports the support disk 14 with respect to the placement table 9, and a drive device 15 that moves the support disk 14, wherein in a restrained state in which the movement of the support disk 14 is restrained by a restraint unit 40, when a lifting shaft 29 is rotated by driving of a motor 21, the pinion 33 moves in the first direction H and moves one of the first plate-shaped member 42 and the second plate-shaped member 46 in a direction away from the other to release the restriction state by the restriction unit 40.SELECTED DRAWING: Figure 6

Description

[Technical Field]

[0001] The present disclosure relates to a sheet member moving device. [Background technology]

[0002] For example, Chinese Utility Model No. 215921965 discloses a seat member moving device that transfers the side impact load of a vehicle to a structural member of the seat member moving device in order to protect a battery from the side impact load of the vehicle. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Chinese Utility Model No. 215921965 Summary of the Invention [Problem to be solved by the invention]

[0004] The seat member moving device according to Chinese Utility Model No. 215921965 includes a fixed member, a rotating member, a locking mechanism, an unlocking motor, a driving mechanism, and a driving motor. The rotating member is rotatably supported by the fixed member. The rotating member is fixed to the fixed member by the locking mechanism.

[0005] When rotating the rotating member, first, the unlocking motor releases the fixed state of the rotating member by the locking mechanism, second, the drive motor rotates the rotating member via the drive mechanism, and third, the unlocking motor fixes the rotating member by the locking mechanism.

[0006] A sheet member rotating device having such a configuration includes two motors, which requires coordination of motor control, making the structure complex, and also increasing the number of parts and weight.

[0007] The present disclosure has been made to solve the above-mentioned problems, and its purpose is to provide a seat member moving device that has fewer parts and is lighter than conventional seat member moving devices. [Means for solving the problem]

[0008] A sheet member moving device according to a first aspect of the present disclosure is a sheet member moving device that moves a sheet member relative to a mounting table, and includes a support plate that supports the sheet member, a base that supports the support plate movably relative to the mounting table, and a drive device that moves the support plate. The drive device includes a drive unit and a restraining unit. The drive unit has a motor, a pinion formed to move the support plate, and an elevator shaft. The elevator shaft is formed to extend in a first direction and is formed to be rotatable by driving of the motor. The elevator shaft further has a support portion formed with a spiral groove. An insertion hole is formed in the center of the pinion, into which the elevator shaft is inserted, and a guide corresponding to the spiral groove formed in the support portion is formed on the inner circumferential surface that defines the insertion hole. The restraining unit has a movable portion and a restraining portion. The movable portion has a first plate-shaped member, a second plate-shaped member, a spring, and an interlocking gear. The first plate-shaped member and the second plate-shaped member are arranged in a first direction with a pinion sandwiched between them. The spring connects the first plate-shaped member and the second plate-shaped member and biases the first plate-shaped member and the second plate-shaped member with a force that moves the first plate-shaped member and the second plate-shaped member toward each other. The interlocking gear connects the first plate-shaped member and the second plate-shaped member and is configured to be able to transmit the approaching or separating motion of one of the first plate-shaped member or the second plate-shaped member to the other. The restraining portion is configured to be able to restrain the movement of the support plate. In a restrained state in which the movement of the support plate is restrained by the restraining unit, when the lifting shaft is rotated by driving the motor, the pinion moves in the first direction and moves one of the first plate-shaped member and the second plate-shaped member in a direction separating from the other, thereby releasing the restrained state by the restraining unit.

[0009] In a sheet member moving device according to a first aspect of the present disclosure, the first plate-shaped member has a first plate portion, and the second plate-shaped member has a second plate portion. The restraining portion has a first gripping portion and a second gripping portion. One end of the first gripping portion is formed to connect to the first plate portion, and the other end is formed to extend toward the support plate in a second direction intersecting the first direction. One end of the second gripping portion is formed to connect to the second plate portion, and the other end is formed to extend toward the support plate in the second direction. In the restrained state, the restraining portion sandwiches the support plate between the first gripping portion and the second gripping portion.

[0010] In a sheet member moving device according to a first aspect of the present disclosure, the support plate has a main body portion, a first contact portion, and a second contact portion. The first contact portion and the second contact portion are arranged in a first direction and are provided on the main body portion. The first contact portion is formed to protrude in the first direction relative to an inner peripheral edge portion of the main body portion and its vicinity. The first gripping portion has a first constraining surface arranged on a surface facing the first contact portion in the first direction. The first constraining surface is formed to move away from the support plate in the first direction as it moves from the first plate portion toward the support plate. The second contact portion is formed to protrude in the first direction relative to the inner peripheral edge portion of the main body portion and its vicinity. The second gripping portion has a second constraining surface arranged on a surface facing the second contact portion in the first direction. The second constraining surface is formed to move away from the support plate in the first direction as it moves from the second plate portion toward the support plate.

[0011] In a sheet member moving device according to a first aspect of the present disclosure, a chamfered surface is formed on the support plate. The restraining portion has a restraining gear. The restraining gear is disposed between a first plate-shaped member and a second plate-shaped member, and is configured to be movable in a first direction together with movement of the first plate-shaped member. The restraining gear has a gear portion and an abutting portion. The gear portion is formed to extend in the first direction, and is configured to be rotatable in conjunction with the pinion in a direction opposite to the rotation direction of the pinion. The abutting portion is connected to one end of the gear portion in the first direction. The abutting portion has an abutting surface facing the chamfered surface. In the restrained state, the abutting surface of the restraining portion abuts against the chamfered surface.

[0012] In a sheet member moving device according to a first aspect of the present disclosure, the support plate is formed in an annular shape. The inner diameter of the support plate is larger than the width of the support plate, which is the difference between the outer diameter and the inner diameter of the support plate. The drive device is located inside the support plate.

[0013] In the sheet member moving device according to the first aspect of the present disclosure, the support disc is formed in an annular shape, and the inner diameter of the support disc is smaller than the width of the support disc, which is the difference between the outer diameter and the inner diameter of the support disc. [Effects of the Invention]

[0014] According to the sheet member moving device according to the present disclosure, it is possible to provide a sheet member moving device that has fewer parts and is lighter in weight than conventional sheet member moving devices. [Brief explanation of the drawings]

[0015] [Figure 1] 1 is a schematic diagram showing a vehicle equipped with a seat rotation device according to an embodiment of the present invention; [Figure 2] 1 is a perspective view of a seat rotation device according to an embodiment of the present invention; [Figure 3] FIG. 2 is an exploded perspective view of the seat rotating device according to the embodiment. [Figure 4] FIG. 2 is an enlarged perspective view of the drive device according to the embodiment. [Figure 5] FIG. 3 is an end view of the VV cross section in FIG. 2. [Figure 6] FIG. 6 is an end view of the cross section VI-VI in FIG. [Figure 7] 10 is a plan view of a seat rotation device having a restraining portion according to a first modified example of the present embodiment. FIG. [Figure 8] FIG. 8 is an end view of the cross section VIII-VIII in FIG. 7. [Figure 9] FIG. 8 is an end view of the cross section IX-IX in FIG. 7. DETAILED DESCRIPTION OF THE INVENTION

[0016] Hereinafter, embodiments of the present disclosure will be described in detail with reference to the drawings. In the drawings, the same or corresponding parts are designated by the same reference numerals, and description thereof will not be repeated.

[0017] FIG. 1 is a schematic diagram of a swivel seat according to this embodiment. The up-down direction H in FIG. 1 is, for example, the up-down direction of a vehicle in which the swivel seat 1 is provided. The width direction W in FIG. 1 is the width direction of the vehicle. The front-rear direction D in FIG. 1 is the front-rear direction of the vehicle. The up-down direction H is an example of the "first direction" in this disclosure.

[0018] The swivel seat 1 includes a seat body 2 and a seat rotation device 10. The seat body 2 has a seat cushion 3 and a seat back 4. The seat cushion 3 supports the buttocks of an occupant. The seat back 4 supports the back of an occupant seated on the seat cushion 3. The seat body 2 is disposed on a floor FL of the vehicle.

[0019] The seat rotation device 10 is an example of a "seat member moving device" in the present disclosure. The seat cushion 3 is an example of a "seat member" in the present disclosure.

[0020] The rotating seat 1 is supported by a support mechanism 5 . More specifically, the support mechanism 5 has a pair of sliders 6 and a base plate 9. The pair of sliders 6 is provided on the floor FL. The pair of sliders 6 includes a slider 6a and a slider 6b. The sliders 6a and 6b are arranged with a gap between them in the width direction W. The slider 6a includes a lower rail 7a and an upper rail 8a. The slider 6b includes a lower rail 7b and an upper rail 8b. The lower rails 7a and 7b are fixed to the floor FL in an orientation parallel to the front-rear direction D. The upper rail 8a is located above the lower rail 7a and is formed so as to be displaceable relative to the lower rail 7a in the front-rear direction D. The same is true for the upper rail 8b. The upper rails 8a and 8b support the base plate 9.

[0021] The base plate 9 is formed to connect the upper rail 8a and the upper rail 8b and supports the seat rotation device 10.

[0022] With this configuration, the seat body 2 is movable in the front-rear direction D, and is rotatable relative to the base plate 9 by the seat rotation device 10. The base plate 9 is an example of the "mounting base" in the present disclosure.

[0023] 2 is a perspective view of the seat rotation device 10. The seat rotation device 10 includes a bracket 11, a base 12, a collar 13, a rotating disk 14, and a drive unit 15 (not shown).

[0024] 3 is an exploded perspective view of the seat rotation device. The rotation disk 14 is an example of the "support disk" of the present disclosure.

[0025] The bracket 11, the base 12, the collar 13, and the rotating disk 14 are arranged coaxially on a rotation axis CL1. The rotation axis CL1 is an axis that is located at the center of the rotating disk 14 and extends in the vertical direction H.

[0026] The base 12 is supported in the vertical direction H by a bracket 11 and is fixed to a base plate 9 shown in Fig. 1. The base 12 is composed of four base portions 12a, 12b, 12c, and 12d. The base portions 12a, 12b, 12c, and 12d are arranged at 90-degree intervals in a circle centered on the rotation axis CL1.

[0027] The turntable 14 is supported on the base 12 so as to be rotatable in a direction perpendicular to the up-down direction H. The turntable 14 is formed to extend in an annular shape. The inner diameter of the turntable 14 is larger than the width of the turntable, which is the difference between the outer and inner diameters of the turntable 14. The turntable 14 is an internal gear with teeth 14a formed on its inner peripheral surface. The turntable 14 has a seat body fixing pin 18 formed to extend upward and to support the seat body 2 (see FIG. 1). The seat body fixing pin 18 is made up of pins 18a, 18b, and 18c. The pins 18a, 18b, and 18c are arranged at 120-degree intervals on an imaginary circle centered on the rotation axis CL1. A collar 13 is provided on the outer periphery of the turntable 14. The collar 13 is a plate-shaped member formed to extend in an annular shape.

[0028] Next, the drive device 15 will be described with reference to Figures 4, 5, and 6. The drive device 15 has a drive unit 20 shown in Figure 4, a housing 27 shown in Figure 5, a cover 28, a bushing 32, and a restraint unit 40.

[0029] First, Fig. 4 is an enlarged perspective view of the drive device, in which the housing 27, the cover 28, the bush 32, and the restraint unit 40 are omitted.

[0030] 4, the drive device 15 is located inside the annularly formed turntable 14. The drive unit 20 has a motor 21, a worm gear 22, an elevating shaft 29, and a pinion 33. The drive unit 20 is fixed to a base plate 9 (not shown).

[0031] The motor 21 is supported by a base plate 9 (not shown). The worm gear 22 is connected to the motor 21. The worm gear 22 has a worm 23 and a worm wheel 25.

[0032] The worm 23 is formed to extend in a direction perpendicular to the rotation axis CL1. Teeth 23a are formed on the worm 23. The worm 23 is formed to be rotatable in a rotation direction perpendicular to the rotation axis CL1 by being driven by the motor 21.

[0033] The worm wheel 25 has teeth 25 a formed thereon that correspond to the teeth 23 a of the worm 23 .

[0034] Second, Fig. 5 is an end view of the VV cross section of Fig. 2. Note that the radial direction R1 in Fig. 5 is the radial direction of the rotation axis CL2 located at the center of the worm wheel 25, and is parallel to the tangent line of the turntable 14 at the point where the pinion 33 (see Fig. 4) contacts the inner peripheral surface of the turntable 14.

[0035] 5, the worm wheel 25 is formed to be rotatable in the same direction as the rotating disk 14 by the rotational motion of the worm 23 (see FIG. 4). When the worm wheel 25 is viewed from a position separated in the up-down direction H in a plan view, an insertion hole 26 is formed in the center of the worm wheel 25.

[0036] The housing 27 and the cover 28 are formed to cover the worm gear 22. The housing 27 is fixed to a base plate 9 (not shown).

[0037] The lift shaft 29 is formed to extend in the vertical direction H and is formed in a cylindrical shape. The lift shaft 29 is inserted into the insertion hole 26 of the worm wheel 25. The lift shaft 29 is disposed coaxially with the rotation axis CL2 of the worm wheel 25 and is formed to be rotatable in the direction of the rotation axis CL2 in synchronization with the rotation of the worm wheel 25. The lift shaft 29 has a base portion 30 and a support portion 31.

[0038] The base portion 30 is inserted into the insertion hole 26 of the worm wheel 25. One end of the base portion 30 is supported by a bushing 32 supported by the housing 27. The other end of the base portion 30 is supported by the cover 28 in the radial direction of the rotation axis CL2.

[0039] The support portion 31 is formed to extend in the vertical direction H. One end of the support portion 31 is connected to an end of the base portion 30. A spiral groove 31a is formed on the outer circumferential surface of the support portion 31.

[0040] Teeth 33a corresponding to teeth 14a (see FIG. 3) of the drive unit 15 are formed on the outer peripheral surface of the pinion 33. An insertion hole 35 is formed in the center of the pinion 33. A guide 33b corresponding to the groove 31a of the support part 31 is formed on the inner peripheral surface defining the insertion hole 35. The support part 31 of the lifting shaft 29 is inserted into the insertion hole 35.

[0041] The restraining unit 40 has a movable part 41 and a restraining part 60 (not shown). The movable portion 41 includes a first plate-shaped member 42, a second plate-shaped member 46, springs 50 and 51, interlocking gears 52 and 53, and a stopper .

[0042] The first plate-shaped member 42 and the second plate-shaped member 46 are arranged in the vertical direction H with the pinion 33 sandwiched therebetween. The first plate-shaped member 42 is located higher in the vertical direction H than the second plate-shaped member 46.

[0043] The first plate-shaped member 42 has a first plate portion 43 and a pair of first side plate portions 44 and 45. The first plate portion 43 is formed to extend in the radial direction R1.

[0044] The pair of first side plates 44, 45 are each formed to extend in the up-down direction H. The pair of first side plates 44, 45 are each formed to hang down in the up-down direction H from an end face of the first plate portion 43 arranged in the radial direction R1. As a result, each of the pair of first side plates 44, 45 is arranged in the radial direction R1. Teeth 44a, 45a are formed on each of the pair of first side plates 44, 45 on the side surface that faces the lifting shaft 29 among the side surfaces arranged in the radial direction R1.

[0045] The second plate-shaped member 46 has a second plate portion 47 and a pair of second side plate portions 48 and 49 . The second plate portion 47 is formed to extend in the radial direction R1. The length of the second plate portion 47 in the radial direction R1 is shorter than the length of the first plate portion 43 in the radial direction R1.

[0046] The pair of second side plates 48, 49 are each formed to extend in the up-down direction H. The pair of second side plates 48, 49 are each formed to rise in the up-down direction H from an end face of the second plate portion 47 arranged in the radial direction R1. As a result, each of the pair of second side plates 48, 49 is arranged in the radial direction R1. For each of the pair of second side plates 48, 49, teeth 48a, 48a are formed on the side surface that faces the lift shaft 29 among the side surfaces arranged in the radial direction R1. The pair of second side plates 48, 49 are arranged between the first side plate portion 44 and the first side plate portion 45.

[0047] The spring 50 connects the first plate portion 43 and the second side plate portion 48 in the vertical direction H. Similarly, the spring 51 connects the first plate portion 43 and the second side plate portion 49 in the vertical direction H.

[0048] The interlocking gear 52 is located between the first side plate portion 44 and the second side plate portion 48. The interlocking gear 52 is formed to correspond to the teeth 44a and the teeth 48a. In this way, the interlocking gear 52 connects the first plate-shaped member and the second plate-shaped member.

[0049] The interlocking gear 53 is located between the first side plate portion 45 and the second side plate portion 49. The interlocking gear 53 is formed to correspond to the teeth 45a and the teeth 49a.

[0050] Third, Fig. 6 is an end view of the cross section taken along line VI-VI in Fig. 2. The radial direction R2 in Fig. 6 is the radial direction of the rotation axis CL2 located at the center of the worm wheel 25, and is the same direction as the linear direction passing through the rotation axis CL1 (see Fig. 4) and the rotation axis CL2. The radial direction R2 is an example of the "second direction" in the present disclosure.

[0051] 6, the interlocking gear 52 (see FIG. 5) and the interlocking gear 53 (see FIG. 5) are each supported in the vertical direction H by a fixed plate 55. The fixed plate 55 is fixed to the cover 28.

[0052] The stopper 54 is disposed at the other end of the lift shaft 29 relative to the bushing 32 .

[0053] The restraining portion 60 has a first gripping portion 61 and a second gripping portion 63 . The first gripping portion 61 is formed so that one end is connected to the first plate portion 43, and the other end is formed so as to extend in the radial direction R2 toward the turntable 14. The first gripping portion 61 is arranged so as to cover the inner peripheral edge portion 65a of the turntable 14 and its vicinity from above in the up-down direction H. The first gripping portion 61 has a first restraining surface 62.

[0054] The first restraint surface 62 is disposed at a position facing the turntable 14 among the surfaces arranged in the up-down direction H of the first gripping portion 61. The first restraint surface 62 is formed so as to move away from the turntable 14 in the up-down direction H as it moves from the first plate portion 43 toward the turntable 14 in the radial direction R2.

[0055] The second gripping portion 63 is formed so as to connect one end to the second plate portion 47, and so as to extend, in the radial direction R2, toward the turntable 14. The second gripping portion 63 is disposed so as to cover the inner peripheral edge portion 65a of the turntable 14 and its vicinity from below in the up-down direction H. The second gripping portion 63 has a second restraining surface 64.

[0056] The second constraining surface 64 is disposed at a position facing the turntable 14 among the surfaces arranged in the up-down direction H of the second gripping portion 63. The second constraining surface 64 is formed so as to move away from the support plate in the second direction R2 from the second plate portion 47 toward the support plate.

[0057] The turntable 14 has a main body portion 65, a first contact portion 66, and a second contact portion 67. The first contact portion 66 and the second contact portion 67 are arranged in the vertical direction H and are provided on the main body portion 65. The first contact portion 66 protrudes upward in the vertical direction H from an inner peripheral edge portion 65a of the main body portion 65 and its vicinity. The second contact portion 67 protrudes downward in the vertical direction H from the inner peripheral edge portion 65a of the main body portion 65 and its vicinity. As a result, the first constraint surface 62 is formed to cover a portion of the first contact portion 66. Furthermore, the second constraint surface 64 is formed to cover a portion of the second contact portion 67.

[0058] The seat rotation device 10 in the above embodiment has a restraining unit 40. The restraining unit 40 has a first plate-shaped member 42 and a second plate-shaped member 46 arranged in the vertical direction. Springs 50, 51 connect the first plate portion 43 of the first plate-shaped member 42 and the second plate portion 47 of the second plate-shaped member 46, and apply a force that brings the first plate-shaped member 42 and the second plate-shaped member 46 closer to each other. In addition, a first gripping portion 61 and a second gripping portion 63 are provided on the first plate portion 43 and the second plate portion 47, respectively.

[0059] By adopting such a configuration, the first gripping portion 61 and the second gripping portion 63 that form the restraining portion 60 can clamp the turntable 14 from the up-down direction H, thereby restraining the rotation of the turntable 14. In addition, it is possible to prevent the turntable 14 from wobbling in the up-down direction H or in the radial direction of the rotation about the rotation axis CL1. The state in which the rotation of the turntable 14 is restrained is referred to as a restrained state.

[0060] In the above embodiment, the turntable 14 has a first contact portion 66 and a second contact portion 67 that protrude from the main body portion 65 in the up-down direction H. Furthermore, the first gripping portion 61 and the second gripping portion 63 each have a first constraining surface 62 and a second constraining surface 64. The first constraining surface 62 and the second constraining surface 64 are angled with respect to the plane in which the turntable 14 rotates.

[0061] By adopting such a configuration, in the restrained state, the first restraint surface 62 contacts the first contact portion 66 at a point or in a line. The same applies to the relationship between the second restraint surface 64 and the second contact portion 67. This allows for relaxed tolerances in the shape of the turntable 14.

[0062] In the above embodiment, a guide 33b corresponding to the groove 31a formed on the outer circumferential surface of the support portion 31 of the lift shaft 29 is formed on the inner circumferential surface of the insertion hole 35 of the pinion 33. The interlocking gears 52, 53 are formed to be able to transmit the movement of at least one of the first plate-shaped member 42 and the second plate-shaped member 46 in the up-down direction H away from or approaching the other to the other.

[0063] With this configuration, the turntable 14 does not move in the constrained state, and the pinion 33 moves in the vertical direction H in conjunction with the rotation of the lift shaft 29. When the pinion 33 moves upward in the vertical direction H, for example, the pinion 33 moves the first plate-shaped member 42 in a direction away from the second plate-shaped member 46. The movement of the first plate-shaped member 42 away from the second plate-shaped member 46 is also transmitted to the second plate-shaped member 46 by the interlocking gears 52 and 53, and the constrained state of the turntable 14 is released. After the release, the pinion 33 begins to rotate about the rotation axis CL2, and the turntable 14 is rotated by the pinion 33. In this way, the single motor 21 included in the seat rotation device 10 can switch the constrained state of the turntable 14 between the constrained state and the unconstrained state, and rotate the turntable 14. This makes it possible to provide a seat member moving device that has fewer parts and is lighter than the conventional seat rotation device 10.

[0064] In the present disclosure, the drive unit 15 is located inside the turntable 14 . By adopting such a configuration, the height of the seat rotation device 10 in the height direction H can be reduced.

[0065] In the above embodiment, the rotating disk 14 in the seat rotation device 10 is used as a representative example of the support disk of the present disclosure, but the present disclosure is not limited to this. For example, the support disk may be a power lifter mechanism in a seat height adjustment device or a power tilt mechanism in a tilt adjustment device. The support disk may also be a pinion gear formed in a straight line.

[0066] In the above embodiment, the up-down direction H is given as a representative example of the first direction of the present disclosure, but the present disclosure is not limited to this. For example, the first direction may be defined as a direction perpendicular to the direction of movement of the support plate.

[0067] In the above embodiment, the radial direction R2 is used as an example of the second direction of the present disclosure, but the present disclosure is not limited to this. For example, the second direction may be defined as a direction perpendicular to the direction of movement of the support disc and the first direction.

[0068] In the above embodiment, the inner diameter of the turntable 14 is larger than the width of the turntable, which is the difference between the outer diameter and the inner diameter of the turntable 14, but the present disclosure is not limited to this. For example, the inner diameter of the turntable 14 may be smaller than the width of the turntable, which is the difference between the outer diameter and the inner diameter of the turntable 14. This allows the outer diameter of the turntable 14 to be reduced, improving the manufacturability of the turntable 14. Furthermore, it is possible to prevent the sheet rotation device 10 from becoming larger. <Variation 1> In the above embodiment, the restraining portion 60 restrains the rotation of the turntable 14 by clamping the turntable 14 from above and below in the direction H, but the present disclosure is not limited to this. For example, the drive device 15 may have a restraining portion 70 instead of the restraining portion 60.

[0069] 7 is a plan view of a seat rotation device 100 having a restraining unit 70 according to a first modified example of this embodiment, viewed from a position separated in the vertical direction H. Unless otherwise specified below, the seat rotation device 100 and its restraining unit 70 are similar in form to the seat rotation device 10 and its restraining unit 60 according to the embodiment of the present disclosure.

[0070] The restraint unit 70 has a restraint gear 71, a restraint gear 83, and a shaft 78. The restraint gear 71 and the restraint gear 83 are disposed between the first plate-shaped member 42 and the second plate-shaped member 46. The restraint gear 71 and the restraint gear 83 are arranged along the circumferential direction of the inner periphery of the rotating disk 84. The pinion 33 is disposed between the restraint gear 71 and the restraint gear 83.

[0071] Fig. 8 is an end view of the cross section taken along line VIII-VIII in Fig. 7. Note that the cover 28 is omitted in Fig. 8.

[0072] The constraint gear 71 is formed to be rotatable about a rotation axis CL3. The constraint gear 83 is formed to be rotatable about a rotation axis CL4. Furthermore, the constraint gears 71 and 83 rotate in conjunction with the rotation of the pinion 33. Note that the constraint gears 71 and 83 rotate in the opposite direction to the rotation direction of the pinion 33. The constraint gears 71 and 83 have substantially the same configuration. The constraint gear 71 has an insertion hole 72 formed therein. The insertion hole 72 is formed so as to extend in the vertical direction H. The constraint gear 71 has a gear portion 73 and an abutment portion 74. The abutment portion 74 is connected to one end of the gear portion 73 in the vertical direction H.

[0073] The gear portion 73 is formed in a cylindrical shape extending in the vertical direction H. The gear portion 73 is located below the abutment portion 74 in the vertical direction H. Teeth 73a are formed on the outer circumferential surface of the gear portion 73. The teeth 73a are formed in a shape corresponding to the teeth 33a of the pinion 33.

[0074] The abutment portion 74 is formed in a disk shape. The diameter of the abutment portion 74 is larger than the diameter of the gear portion 73. The abutment portion 74 has a contact surface 75, a pressing surface 76, and an abutment surface 77. The contact surface 75 and the pressing surface 76 are arranged in the up-down direction H. The pressing surface 76 is located below the contact surface 75. The abutment surface 77 connects the outer periphery of the contact surface 75 with the outer periphery of the pressing surface 76. The abutment surface 77 is formed so as to widen outward from the center of the gear portion 73 as it moves from the pressing surface 76 toward the contact surface 75. The abutment surface 77 is located opposite a chamfered surface 87 (see FIG. 9 ), which will be described later.

[0075] The shaft 78 is formed to extend in the vertical direction H. The shaft 78 has a head 79 and a shaft portion 80. The head 79 is provided at one end of the shaft portion 80. The shaft portion 80 is formed to extend downward from the head 79 in the vertical direction H. The first plate portion 43a and the second plate portion 47a are formed with a through hole 81a and a through hole 82a that are formed to extend in the vertical direction H. The shaft portion 80 passes through the through hole 81a and the through hole 82a and is inserted into the insertion hole 72. The shaft 78 is formed so that the restraint gear 71 can rotate.

[0076] FIG. 9 is an end view of the cross section taken along line IX-IX of FIG. The rotating disk 84 has a chamfered surface 87 that connects the inner peripheral surface 85 and the upper surface 86. The chamfered surface 87 is formed with the same inclination as the contact surface 77.

[0077] In the above embodiment, the constraint gear 71, the pinion 33, and the constraint gear 83 are arranged in this order along the circumferential direction of the inner periphery of the rotating disk 84. The constraint gear 71 and the constraint gear 83 each have an abutment surface 77. The rotating disk 84 has a chamfered surface 87, which is a surface parallel to the abutment surface 77, at a position facing the abutment surface 77. The first plate portion 43a and the second plate portion 47a are biased by springs 50 and 51 with forces that bring them closer to each other.

[0078] With this configuration, the force of the springs 50, 51 that brings the first plate portion 43a and the second plate portion 47a closer together causes the abutment surfaces 77 of the constraint gears 71 and 83 to abut against the chamfered surfaces 87. When the lift shaft 29 rotates in this state, the lift shaft 29 applies a force to the pinion 33 in the same rotational direction as the rotational direction of the lift shaft 29. The pinion 33 applies a force to the turntable 84 in the same rotational direction as the pinion 33, and applies a force to the constraint gears 71 and 83 that mesh with the pinion 33 in the rotational direction opposite to the rotational direction of the pinion 33. The constraint gears 71 and 83 apply a force to the turntable 84 in the rotational direction opposite to the rotational direction of the pinion 33 via the abutment surfaces 77.

[0079] As described above, the turntable 84 is imparted with a force from the pinion 33 in the same rotational direction as the rotational direction of the pinion 33, and is imparted with a force from the constraint gear 71 and the constraint gear 83 in the opposite rotational direction to the rotational direction of the pinion 33, so that the forces applied to the turntable 84 to rotate the turntable 84 can be offset. In other words, the rotational motion of the turntable 84 can be constrained. The state in which the rotational motion of the turntable 84 is constrained is called a constrained state.

[0080] When the lift shaft 29 begins to rotate in the constrained state, the pinion 33 cannot rotate and therefore moves in the vertical direction H along the groove 31a of the lift shaft 29. When the pinion 33 moves upward in the vertical direction H, the pinion 33 comes into contact with the pressing surfaces 76 of the constrained gears 71 and 83, respectively, and moves the first plate portion 43a upward together with the constrained gears 71 and 83. Alternatively, when the pinion 33 moves downward in the vertical direction H, the pinion 33 comes into contact with the second plate portion 47a, and the movement of the second plate portion 47a in the direction away from the first plate portion 43a is transmitted to the first plate portion 43a by the interlocking gears 52 and 53. As the first plate portion 43a moves, the constrained gears 71 and 83 move away from each other. As a result, the abutment surface 77 comes into contact with the chamfered surface 87, and the constrained state is released.

[0081] In this way, the single motor 21 of the seat rotation device 10 can switch the rotating disk 84 between a constrained state and an unconstrained state, and rotate the rotating disk 84. This makes it possible to provide a seat member moving device that has fewer parts and is lighter than conventional seat member moving devices. This makes it possible to provide a seat member moving device that has fewer parts and is lighter than conventional seat member moving devices.

[0082] The embodiments disclosed herein should be considered to be illustrative in all respects and not restrictive. The scope of the present disclosure is defined by the claims, not by the description of the above embodiments, and is intended to include all modifications within the meaning and scope of the claims. [Explanation of symbols]

[0083] 1 Rotating seat, 2 Seat body, 3 Seat cushion, 4 Seat back, 5 Support mechanism, 6 Slider, 9 Base plate, 10 Seat rotation device, 11 Bracket, 12 Base, 13 Collar, 14 Turntable, 14a Teeth, 15 Drive device, 18 Seat body fixing pin, 20 Drive unit, 21 Motor, 22 Worm gear, 23 Worm, 23a Teeth, 25 Worm wheel, 25a Teeth, 26 Insertion hole, 27 Housing, 28 Cover, 29 Lifting shaft, 30 Base portion, 31 Support portion, 31a Groove, 32 Bush, 33 Pinion, 33a Teeth, 33b Guide, 35 Insertion hole, 40 Restraint unit, 41 Movable portion, 42 First plate-shaped member, 43, 43a First plate portion, 44, 45 First side plate portion, 44a, 45a; teeth, 46; second plate-shaped member, 47, 47a; second plate portion, 48, 49; second side plate portion, 48a, 48a; teeth, 50, 51; spring, 52, 53; interlocking gear, 54; stopper, 55; fixed plate, 60; restraint portion, 61; first gripping portion, 62; first restraint surface, 63; second gripping portion, 64; second restraint surface, 65; main body portion, 65a; inner peripheral edge portion, 66; first contact portion, 67; second contact portion, 70; restraint portion, 71; restraint gear, 72; insertion hole, 73; gear portion, 73a; teeth, 74; abutment portion, 75; contact surface, 76; pressing surface, 77; abutment surface, 78; shaft, 79; head portion, 80; shaft portion, 81a, 82a; through-hole, 83; restraint gear, 84 Rotating plate, 85 inner surface, 86 upper surface, 87 chamfer surface, 100 seat rotating device, CL1, CL2, CL3, CL4 rotating shaft, FL floor.

Claims

1. A sheet member moving device that moves a sheet member relative to a mounting base, a support plate that supports the sheet member; a drive device for moving the support plate; The drive device includes a drive unit and a restraint unit, the drive unit includes a motor, a pinion configured to move the support plate, and an elevator shaft; the lifting shaft is formed to extend in a first direction and is formed to be rotatable by being driven by the motor, the lifting shaft has a support portion with a spiral groove formed therein; An insertion hole into which the lifting shaft is inserted is formed at the center of the pinion, a guide corresponding to the spiral groove formed in the support portion is formed on an inner peripheral surface that defines the insertion hole, The restraining unit has a movable part and a restraining part, the movable portion includes a first plate-shaped member, a second plate-shaped member, a spring, and an interlocking gear; the first plate-shaped member and the second plate-shaped member are arranged in the first direction with the pinion sandwiched therebetween, the spring connects the first plate-shaped member and the second plate-shaped member and biases the first plate-shaped member and the second plate-shaped member with a force that brings the first plate-shaped member and the second plate-shaped member closer together; the interlocking gear connects the first plate-shaped member and the second plate-shaped member, and is formed to be able to transmit an approaching motion or a separating motion of one of the first plate-shaped member or the second plate-shaped member to the other, The restraining portion is formed to be able to restrain the movement of the support plate, A sheet member moving device in which, in a constrained state in which the movement of the support plate is constrained by the constraining unit, the lifting shaft rotates due to the driving of the motor, causing the pinion to move in the first direction and move one of the first plate-shaped member and the second plate-shaped member in a direction away from the other, thereby releasing the constrained state caused by the constraining unit.

2. the first plate-shaped member has a first plate portion, the second plate-shaped member has a second plate portion, The restraining portion has a first gripping portion and a second gripping portion, one end of the first gripping portion is formed to be connected to the first plate portion, and the other end is formed to extend toward the support plate in a second direction intersecting the first direction, One end of the second gripping portion is formed to be connected to the second plate portion, and the other end is formed to extend toward the support plate in the second direction, The sheet member moving device according to claim 1 , wherein the restraining portion is configured such that the first gripping portion and the second gripping portion sandwich the support plate in the restrained state.

3. The support plate has a main body portion, a first contact portion, and a second contact portion, the first contact portion and the second contact portion are arranged in the first direction and are provided on the main body portion; the first contact portion is formed to protrude in the first direction from an inner peripheral edge portion of the main body portion and its vicinity, the first gripping portion has a first restraining surface disposed on a surface facing the support plate in the first direction, the first constraint surface is formed so as to become increasingly farther away from the support plate in the first direction as it moves from the first plate portion toward the first contact portion, the second contact portion is formed to protrude in the first direction from an inner peripheral edge portion of the main body portion and its vicinity, the second gripping portion has a second restraining surface disposed on a surface facing the second contact portion in the first direction, The sheet member moving device according to claim 2 , wherein the second restraint surface is formed so as to move away from the support plate in the first direction as it moves from the second plate portion toward the support plate.

4. The support plate has a chamfered surface formed thereon, the restraint portion has a restraint gear, the restraining gear is disposed between the first plate-shaped member and the second plate-shaped member and is configured to be movable in the first direction together with the movement of the first plate-shaped member, The restraint gear has a gear portion and a contact portion, the gear portion is formed to extend in the first direction and to be rotatable in a direction opposite to a rotation direction of the pinion in conjunction with the pinion, the abutment portion is connected to one end of the gear portion in the first direction, the abutment portion has an abutment surface facing the chamfer surface, The sheet member moving device according to claim 1 , wherein the contact surface of the restraining portion abuts against the chamfer surface in the restrained state.

5. The support disc is formed in an annular shape, The inner diameter of the support disc is larger than the width of the support disc, which is the difference between the outer diameter and the inner diameter of the support disc, 5. The sheet member moving device according to claim 1, wherein the drive device is located inside the support plate.

6. The support disc is formed in an annular shape, 4. The sheet member moving device according to claim 1, wherein an inner diameter of the support plate is smaller than a width of the support plate, which is the difference between the outer diameter and the inner diameter of the support plate.

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