Seat member movable device

Abstract

Provided is a seat member moving device that moves a seat member relative to a mounting table. The seat member moving device includes a support plate that supports the seat member, a base that supports the support plate so that the support plate can move relative to the mounting table, and a drive device that moves the support plate. In a constrained state in which the movement of the support disk is constrained by the constraining means, the lifting shaft is rotated by the driving of the motor, whereby the pinion moves in a first direction (H), and one of the first plate-like member and the second plate-like member moves in a direction away from the other, thereby releasing the constrained state by the constraining means.

Description

TECHNICAL FIELD

[0001] The present disclosure relates to a seat component movable device. BACKGROUND

[0002] For example, a seat component movable device is disclosed in Chinese Utility Model Publication No. 215921965, in which a structure member of the seat component movable device is provided to transmit a side collision load of a vehicle to a battery in order to protect the battery from the side collision load of the vehicle. SUMMARY

[0003] The seat component movable device disclosed in Chinese Utility Model Publication No. 215921965 has a fixed member, a rotating member, a locking mechanism, a lock release motor, a driving mechanism, and a driving motor. The rotating member is rotatably supported by the fixed member. The rotating member is fixed with respect to the fixed member by the locking mechanism.

[0004] When the rotating member is rotated, first, the lock release motor releases the fixed state of the rotating member by the locking mechanism. Second, the driving motor rotates the rotating member via the driving mechanism. Third, the lock release motor fixes the rotating member by the locking mechanism.

[0005] The seat component rotating device having such a structure has two motors, and thus not only the cooperation of the motor control is required, but also the structure becomes complicated, and the number of components and the weight are increased.

[0006] The present disclosure has been made to solve the above problem, and an object thereof is to provide a seat component movable device having a small number of components and being lightweight compared to conventional seat component movable devices.

[0007] The first aspect of the present disclosure relates to a seat component movable device that moves a seat component with respect to a table, and includes a support disc that supports the seat component, a base that supports the support disc so as to be movable with respect to the table, and a drive device that moves the support disc. The drive device includes a drive unit and a restriction unit. The drive unit includes a motor, a lift shaft, and a pinion gear that is formed so as to enable movement of the support disc. The lift shaft is formed so as to extend in a first direction, and is formed so as to be rotatable by driving of the motor. Further, the lift shaft has a support portion in which a helical groove is formed. An insertion hole in which the lift shaft is inserted is formed in the center of the pinion gear, and a guide that corresponds to the helical groove formed in the support portion is formed in an inner peripheral surface of the insertion hole. The restriction unit includes a movable portion and a restriction portion. The movable portion includes a first plate-shaped member, a second plate-shaped member, a spring, and a link gear. The first plate-shaped member and the second plate-shaped member are arranged in the first direction with the pinion gear interposed therebetween. The spring connects the first plate-shaped member and the second plate-shaped member, and applies a force that brings the first plate-shaped member and the second plate-shaped member closer to each other. The link gear connects the first plate-shaped member and the second plate-shaped member, and is formed so as to be able to transmit a bringing action or a moving away action of one of the first plate-shaped member or the second plate-shaped member to the other. The restriction portion is formed so as to be able to restrict movement of the support disc. In a restricted state in which movement of the support disc is restricted by the restriction unit, the lift shaft is rotated by driving of the motor, whereby the pinion gear is moved in the first direction, and one of the first plate-shaped member and the second plate-shaped member is moved in a direction away from the other, and the restricted state based on the restriction unit is released.

[0008] In the seat component movable device of the first aspect of the present disclosure, the first plate-shaped member can have a first plate portion, and the second plate-shaped member can have a second plate portion. The restriction portion can have a first holding portion and a second holding portion. One end of the first holding portion can be formed so as to be connected to the first plate portion, and the other end can be formed so as to extend toward the support disc in a second direction that intersects the first direction. One end of the second holding portion can be formed so as to be connected to the second plate portion, and the other end can be formed so as to extend toward the support disc in the second direction. In the restricted state, the first holding portion and the second holding portion can be interposed between the support disc.

[0009] In the seat component movable device according to the first aspect of the present disclosure, the support disc can have 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 to the main body portion. The first contact portion is formed to protrude in the first direction with respect to the inner peripheral portion of the main body portion and its vicinity. The first contact portion has a first restriction surface provided to a surface facing the first contact portion in the first direction. The first restriction surface is formed to gradually move away from the support disc in the first direction as it approaches the first contact portion from the first plate portion. The second contact portion is formed to protrude in the first direction with respect to the inner peripheral portion of the main body portion and its vicinity. The second contact portion has a second restriction surface provided to a surface facing the second contact portion in the first direction. The second restriction surface is formed to gradually move away from the support disc in the first direction as it approaches the second contact portion from the second plate portion.

[0010] In the seat component movable device according to the first aspect of the present disclosure, a chamfer surface can be formed to the support disc. The restriction portion has a restriction gear. The restriction gear is provided between the first plate-like portion and the second plate-like portion and is formed to be movable in the first direction as the first plate-like portion moves. The restriction gear has a gear portion and an abutting portion. The gear portion is formed to extend in the first direction and is formed to be rotatable in a direction opposite to the rotation direction of the pinion gear in conjunction with the pinion gear. 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 chamfer surface. The restriction portion is in the restriction state in which the abutting surface abuts against the chamfer surface.

[0011] In the seat component movable device according to the first aspect of the present disclosure, the support disc can be formed in a ring 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. The drive device is located on the inner side of the support disc.

[0012] In the seat component movable device according to the first aspect of the present disclosure, the support disc can be formed in a ring shape. 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. The above and other objects, features, aspects and advantages of the present application will become more apparent from the following detailed description of the present application taken in conjunction with the accompanying drawings, in which: BRIEF DESCRIPTION OF DRAWINGS

[0013] Figure 1 is a schematic view of a swivel seat according to the present embodiment. Figure 2 is a perspective view of a seat swivel device according to the present embodiment. Figure 3 is an exploded perspective view of a seat swivel device according to the present embodiment. Figure 4is an enlarged perspective view of the driving device according to the embodiment. Figure 5 is Figure 2 is a sectional view of the V-V section in Figure 6 is Figure 2 is a sectional view of the VI- VI section in Figure 7 is a plan view of the seat rotating device having the restriction portion in Modification 1 of the embodiment. Figure 8 is Figure 7 is a sectional view of the VIII-VIII section in Figure 9 is Figure 7 is a sectional view of the IX-IX section in DETAILED DESCRIPTION

[0014] Hereinafter, the embodiments of the present disclosure will be described in detail with reference to the drawings. In the drawings, the same or corresponding portions are denoted by the same reference numerals, and the description thereof will not be repeated.

[0015] Figure 1 is a schematic view of the swivel seat according to the embodiment. Figure 1 The up-and-down direction H of the swivel seat 1 is, for example, the up-and-down direction of a vehicle in which the swivel seat 1 is provided. Figure 1 The width direction W of the swivel seat 1 is the width direction of the vehicle. Figure 1 The front-and-rear direction D of the swivel seat 1 is the front-and-rear direction of the vehicle. Note that the up-and-down direction H is an example of the "first direction" in the present disclosure.

[0016] The swivel seat 1 includes a seat main body 2 and a seat rotating device 10. The seat main body 2 includes a seat cushion 3 and a seat back 4. The seat cushion 3 supports the hips of an occupant. The seat back 4 supports the back of the occupant seated on the seat cushion 3. The seat main body 2 is disposed on a floor FL of a vehicle.

[0017] Note that the seat rotating device 10 is an example of the "seat member movable device" in the present disclosure. The seat main body 2 is an example of the "seat member" in the present disclosure.

[0018] The swivel 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 to the floor FL. The pair of sliders 6 has a slider 6a and a slider 6b. The slider 6a and the slider 6b are arranged at intervals in the width direction W. The slider 6a has a lower rail 7a and an upper rail 8a. The slider 6b has a lower rail 7b and an upper rail 8b. The lower rails 7a, 7b are fixed to the floor FL in a posture 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 relatively displaceable in the front-rear direction D with respect to the lower rail 7a. The same is true of the upper rail 8b. The upper rails 8a, 8b support the base plate 9.

[0019] The base plate 9 is formed to connect the upper rails 8a, 8b. The base plate 9 supports the seat rotating device 10.

[0020] With such a configuration, the seat body 2 is movable in the front-rear direction D and is rotatable with respect to the base plate 9 by the seat rotating device 10. Note that the base plate 9 is an example of a "mounting table" in the present disclosure.

[0021] Figure 2 is a perspective view of the seat rotating device. The seat rotating device 10 includes a bracket 11, a base 12, a collar 13, a rotating disc 14, and a driving device 15, none of which is illustrated.

[0022] Figure 3 is an exploded perspective view of the seat rotating device. Note that the rotating disc 14 is an example of a "supporting disc" in the present disclosure.

[0023] The bracket 11, the base 12, the collar 13, and the rotating disc 14 are arranged coaxially on a rotation axis CL1. Note that the rotation axis CL1 is an axis extending in the up-down direction H at the center of the rotating disc 14.

[0024] The base 12 is supported by the bracket 11 in the up-down direction H and is fixed to Figure 1 the base plate 9 illustrated. The base 12 is composed of four base portions 12a, 12b, 12c, 12d. The base portions 12a, 12b, 12c, 12d are each arranged at intervals of 90 degrees on an imaginary circle centered on the rotation axis CL1.

[0025] The rotating disc 14 is supported so as to be rotatable with respect to the base 12 in a direction orthogonal to the up-down direction H. The rotating disc 14 is formed so as to extend in a ring shape. The inner diameter of the rotating disc 14 is larger than the difference between the outer diameter and the inner diameter of the rotating disc 14, i.e., the width of the rotating disc. The rotating disc 14 is an internal gear in which teeth 14a are formed on an inner peripheral surface. The rotating disc 14 has a recess 14b for supporting the seat body 2 (see FIG. 1) and a recess 14c for supporting the driving device 15. Figure 1A seat body fixing pin 18 formed in a manner extending upward from the seat body 10 is formed. The seat body fixing pin 18 is formed by pins 18a, 18b, 18c. The pins 18a, 18b, 18c are each arranged at an interval of 120 degrees on an imaginary circle centered on the rotation axis CL1. A collar 13 is provided on the outer periphery of the rotary disc 14. The collar 13 is a plate-like member formed in a manner extending in a ring shape.

[0026] Next, the driving device 15 will be described with reference to Figure 4 , Figure 5 and Figure 6 . The driving device 15 has a driving unit 20 shown in Figure 4 , a housing 27, a cover 28, a bush 32 and a restraint unit 40 shown in Figure 5 .

[0027] First, Figure 4 is an enlarged perspective view of the driving device. Note that Figure 4 omits the description of the housing 27, the cover 28, the bush 32 and the restraint unit 40.

[0028] With reference to Figure 4 , the driving device 15 is located on the inner side of the rotary disc 14 formed in a ring shape. The driving unit 20 has a motor 21, a worm gear 22, a lifting shaft 29 and a pinion 33. The driving unit 20 is fixed to a base plate 9 not shown.

[0029] The motor 21 is supported by the 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.

[0030] The worm 23 is formed to extend in a direction orthogonal to the rotation axis CL1. The worm 23 is formed with teeth 23a. The worm 23 is formed to be rotatable in a rotation direction orthogonal to the rotation axis CL1 by driving of the motor 21.

[0031] The worm wheel 25 is formed with teeth 25a corresponding to the teeth 23a of the worm 23.

[0032] Second, Figure 5 is a sectional view of V-V of Figure 2 . Note that Figure 5 the radial direction R1 of the worm wheel 25 is a radial direction of the rotation axis CL2 located at the center of the worm wheel 25, and is a direction parallel to a tangent line of the rotary disc 14 at a point where the pinion 33 (refer to Figure 4 ) contacts the inner periphery surface of the rotary disc 14.

[0033] With reference to Figure 5 , the worm wheel 25 is formed to be rotatable by the worm 23 (refer to Figure 4The rotation of the worm 25 is transmitted to the pinion 33 via the rotation of the rotation disk 14. The rotation of the pinion 33 is transmitted to the movable section 41 via the rotation of the linkage gears 52, 53. The movable section 41 is configured to be movable in the up-and-down direction H. The movable section 41 is configured to be movable in the up-and-down direction H in accordance with the rotation of the pinion 33. The movable section 41 is configured to be rotatable in the same direction as the rotation disk 14 in accordance with the rotation of the pinion 33. When the worm 25 is viewed in plan from a position away from the worm 25 in the up-and-down direction H, an insertion hole 26 is formed in the center of the worm 25.

[0034] A housing 27 and a cover 28 are formed to cover the worm gear 22. The housing 27 is fixed to a base plate 9, which is not shown.

[0035] The lift shaft 29 is formed to extend in the up-and-down direction H and is formed in a cylindrical shape. The lift shaft 29 is inserted into the insertion hole 26 of the worm 25. The lift shaft 29 is arranged coaxially with the rotation axis CL2 of the worm 25 and is formed to be rotatable in the direction of the rotation axis CL2 in synchronization with the rotation of the worm 25. The lift shaft 29 has a base section 30 and a support section 31.

[0036] The base section 30 is inserted into the insertion hole 26 of the worm 25. One end of the base section 30 is supported by a bush 32 supported by the housing 27. The other end of the base section 30 is supported by the cover 28 in the radial direction of the rotation axis CL2.

[0037] The support section 31 is formed to extend in the up-and-down direction H. One end of the support section 31 is connected to the end of the base section 30. A helical groove 31a is formed in the outer peripheral surface of the support section 31.

[0038] A helical groove 34 is formed in the outer peripheral surface of the pinion 33. The helical groove 34 is formed to correspond to the helical groove 31a of the support section 31. Figure 3 The pinion 33 is formed to have an insertion hole 35 in the center. A guide 33b is formed in the inner peripheral surface of the insertion hole 35 to correspond to the helical groove 31a of the support section 31. The support section 31 of the lift shaft 29 is inserted into the insertion hole 35.

[0039] The restriction unit 40 has a movable section 41 and a restriction section 60, which is not shown. The movable section 41 has a first plate-like member 42, a second plate-like member 46, springs 50, 51, linkage gears 52, 53, and a stopper 54.

[0040] The first plate-like member 42 and the second plate-like member 46 are arranged in the up-and-down direction H with the pinion 33 interposed therebetween. Note that the first plate-like member 42 is located above the second plate-like member 46 in the up-and-down direction H.

[0041] The first plate-like member 42 has a first plate section 43 and a pair of first side plate sections 44, 45.

[0042] The first plate section 43 is formed to extend in the radial direction R1.

[0043] A pair of first side plate portions 44 and 45 are each formed to extend along the vertical direction H. The pair of first side plate portions 44 and 45 are each formed to hang down from the end face of the first plate portion 43 arranged in the radial direction R1 in the vertical direction H. Thus, the pair of first side plate portions 44 and 45 are each arranged in the radial direction R1. For each of the pair of first side plate portions 44 and 45, the side facing the lifting shaft 29 among the side surfaces arranged in the radial direction R1 is formed with teeth 44a and 45a.

[0044] The second plate-shaped member 46 has a second plate portion 47 and a pair of second side plate portions 48, 49.

[0045] The second plate portion 47 is formed to extend along 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] A pair of second side plate portions 48 and 49 are each formed to extend along the vertical direction H. The pair of second side plate portions 48 and 49 are each formed to stand upright in the vertical direction H from the end face of the second plate portion 47 arranged in the radial direction R1. Thus, the pair of second side plate portions 48 and 49 are each arranged in the radial direction R1. For each of the pair of second side plate portions 48 and 49, the side facing the opposite side to the lifting shaft 29 among the sides arranged in the radial direction R1 is formed with teeth 48a and 49a. The pair of second side plate portions 48 and 49 are disposed between the first side plate portion 44 and the first side plate portion 45.

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

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

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

[0050] third, Figure 6 yes Figure 2 A sectional view of section VI-VI. Figure 6 The radial direction R2 is the radial direction of the rotating shaft CL2 located at the center of the worm gear 25, and is perpendicular to the direction of the rotating shaft CL1 (refer to...). Figure 4 The direction is the same as the linear direction of the rotation axis CL2. The radial direction R2 is an example of the "second direction" in this disclosure.

[0051] Reference Figure 6The link gears 52 (refer to Figure 5 ) and 53 (refer to Figure 5 ) are respectively supported by a fixed plate 55 in the up-down direction H. The fixed plate 55 is fixed to the cover 28.

[0052] The stopper 54 is arranged at the end of the lift shaft 29, that is, the other end with respect to the bush 32.

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

[0054] The first restraint surface 62 is arranged at a position facing the rotary disc 14 among the surfaces arranged in the up-down direction H of the first gripping portion 61. The first restraint surface 62 is formed to gradually depart from the rotary disc 14 in the up-down direction H as it goes from the first plate portion 43 toward the rotary disc 14 in the radial direction R2.

[0055] One end of the second gripping portion 63 is formed to be connected to the second plate portion 47, and the other end is formed to extend toward the rotary disc 14 in the radial direction R2. The second gripping portion 63 is arranged to cover the inner peripheral portion 65a of the rotary disc 14 and its vicinity from below in the up-down direction H. The second gripping portion 63 has a second restraint surface 64.

[0056] The second restraint surface 64 is arranged at a position facing the rotary disc 14 among the surfaces arranged in the up-down direction H of the second gripping portion 63. The second restraint surface 64 is formed to gradually depart from the rotary disc 14 in the up-down direction H as it goes from the second plate portion 47 toward the rotary disc 14 in the radial direction R2.

[0057] The rotary disc 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 up-down direction H and are provided on the main body portion 65. The first contact portion 66 protrudes toward the upper side in the up-down direction H with respect to the inner peripheral portion 65a of the main body portion 65 and its vicinity. The second contact portion 67 protrudes toward the lower side in the up-down direction H with respect to the inner peripheral portion 65a of the main body portion 65 and its vicinity. Thus, the first restraint surface 62 is formed to cover a part of the first contact portion 66. Also, the second restraint surface 64 is formed to cover a part of the second contact portion 67.

[0058] The seat swivel device 10 in the above embodiment has a restriction unit 40. The restriction unit 40 has a first plate-like member 42 and a second plate-like member 46 arranged in the up-down direction. Springs 50, 51 connect a first plate portion 43 of the first plate-like member 42 and a second plate portion 47 of the second plate-like member 46, and apply a force that brings the first plate-like member 42 and the second plate-like member 46 closer. Meanwhile, a first gripping portion 61 and a second gripping portion 63 are provided on each of the first plate portion 43 and the second plate portion 47, respectively.

[0059] By being configured in this way, the first gripping portion 61 and the second gripping portion 63 that form the restriction portion 60 are sandwiched from the up-down direction H by the swivel plate 14, and thus the swivel plate 14 can be restricted from rotating. Furthermore, the swivel plate 14 can be inhibited from wobbling in the up-down direction H and in the direction of the radius of rotation centered on the rotation axis CL1. Note that a state in which the rotation of the swivel plate 14 is restricted is referred to as a restricted state.

[0060] In the above embodiment, the swivel plate 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 restriction surface 62 and a second restriction surface 64. The first restriction surface 62 and the second restriction surface 64 are angled with respect to the plane on which the swivel plate 14 rotates.

[0061] By being configured in this way, in the restricted state, the first restriction surface 62 is in point contact or line contact with the first contact portion 66. The same is true of the relationship between the second restriction surface 64 and the second contact portion 67. Thus, the tolerance of the shape of the swivel plate 14 can be relaxed.

[0062] In the above embodiment, a guide 33b that corresponds to the groove 31a formed by 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 link gears 52, 53 are configured to transmit the movement of at least one of the first plate-like member 42 and the second plate-like member 46 in the up-down direction H away from or closer to the other to the other.

[0063] By being configured in this way, the rotating disk 14 does not move in the restrained state, and thus the pinion 33 moves in the up-down direction H in linkage with the rotation of the lifting shaft 29. When the pinion 33 moves upward in the up-down 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 action of the first plate-shaped member 42 moving away from the second plate-shaped member 46 is also transmitted to the second plate-shaped member 46 through the linkage gears 52, 53, and the restrained state of the rotating disk 14 is released. After the release, the pinion 33 starts the rotational movement around the rotational axis CL2, and the rotating disk 14 is rotated by the pinion 33. In this way, the switching between the restrained state and the unrestrained state of the rotating disk 14 and the rotation of the rotating disk 14 can be achieved by one motor 21 of the seat rotating device 10. Thus, compared with the conventional seat rotating device, the seat rotating device 10 can be provided as a seat component movable device with a small number of components and light weight.

[0064] In the present disclosure, the driving device 15 is located on the inner side of the rotating disk 14. By being configured in this way, the height of the seat rotating device 10 in the up-down direction H can be reduced.

[0065] In the above embodiment, the rotating disk 14 in the seat rotating device 10 is exemplified as a representative example of the support disk of the present disclosure, but the present disclosure is not limited thereto. For example, it can be a power lifting mechanism in a seat height adjustment device, or it can be a power tilting mechanism in a tilting adjustment device. In addition, the support disk can be a pinion formed on a straight line.

[0066] In the above embodiment, the up-down direction H is exemplified as a representative example of the first direction of the present disclosure, but the present disclosure is not limited thereto. For example, the first direction can be defined as a direction orthogonal to the movement direction of the support disk.

[0067] In the above embodiment, the radial direction R2 is exemplified as a representative example of the second direction of the present disclosure, but the present disclosure is not limited thereto. For example, the second direction can be defined as a direction orthogonal to the movement direction of the support disk and the first direction.

[0068] In the above embodiment, an example in which the inner diameter of the rotating disk 14 is larger than the difference between the outer diameter and the inner diameter of the rotating disk 14, i.e., the width of the rotating disk, is shown, but the present disclosure is not limited thereto. For example, the inner diameter of the rotating disk 14 can be smaller than the difference between the outer diameter and the inner diameter of the rotating disk 14, i.e., the width of the rotating disk. Thus, the outer diameter of the rotating disk 14 can be reduced, and the manufacturability of the rotating disk 14 can be improved. In addition, the seat rotating device 10 can be prevented from being upsized. <Variant 1> In the above-described embodiment, an example in which the restriction portion 60 sandwiches the rotating disc 14 from the up-down direction H to restrict the rotation of the rotating disc 14 is shown, but the present disclosure is not limited to this. For example, the drive device 15 can have a restriction portion 70 instead of the restriction portion 60.

[0069] Figure 7 is a plan view of the seat rotating device 100 having the restriction portion 70 in Modification 1 of the present embodiment, viewed in plan from a position apart in the up-down direction H. The seat rotating device 100 and its restriction portion 70 are, in the absence of special description, each in the same manner as the seat rotating device 10 and its restriction portion 60 in the embodiments of the present disclosure.

[0070] The restriction portion 70 has a restriction gear 71, a restriction gear 83, and a shaft 78. The restriction gear 71 and the restriction gear 83 are disposed between the first plate-like member 42 and the second plate-like member 46. The restriction gear 71 and the restriction gear 83 are arranged in the circumferential direction of the inner periphery of the rotating disc 84. The pinion 33 is disposed between the restriction gear 71 and the restriction gear 83.

[0071] Figure 8 is Figure 7 is a sectional view of VIII-VIII of Figure 8 The cover 28 is omitted in

[0072] The restriction gear 71 is formed so as to be rotatable about the rotation axis CL3. The restriction gear 83 is formed so as to be rotatable about the rotation axis CL4. Also, the restriction gear 71 and the restriction gear 83 rotate in linkage with the rotation of the pinion 33. Note that the restriction gear 71 and the restriction gear 83 rotate in reverse directions with respect to the rotation direction of the pinion 33. The restriction gear 71 and the restriction gear 83 are substantially the same. The restriction gear 71 is formed with an insertion hole 72. The insertion hole 72 is formed so as to extend in the up-down direction H. The restriction 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 up-down direction H.

[0073] The gear portion 73 is formed so as to extend in the up-down direction H and so as to be cylindrical. The gear portion 73 is located below the abutment portion 74 in the up-down direction H. Teeth 73a are formed on the outer peripheral 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 disc 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 vertical direction H. It should be noted that the pressing surface 76 is located below the contact surface 75. The abutment surface 77 connects the outer peripheral edge of the contact surface 75 and the outer peripheral edge of the pressing surface 76. The abutment surface 77 is formed 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 positioned relative to the chamfered surface 87 described later (see reference). Figure 9 (The positions facing each other.)

[0075] Shaft 78 is formed to extend in the vertical direction H. 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. Through holes 81a and 82a extending in the vertical direction H are formed in the first plate portion 43a and the second plate portion 47a. The shaft portion 80 passes through the through holes 81a and 82a and is inserted into the insertion hole 72. Shaft 78 is formed in a manner that allows the gear 71 to rotate.

[0076] Figure 9 yes Figure 7 A sectional view of section IX-IX. The rotating disk 84 has a chamfered surface 87 connecting the inner peripheral surface 85 and the upper surface 86. The chamfered surface 87 is formed with the same inclination as the abutment surface 77.

[0077] In Variation 1 of the above embodiment, the constraint gear 71, pinion 33, and constraint gear 83 are arranged in this order along the circumferential direction of the inner periphery of the rotating disk 84. Each of the constraint gears 71 and 83 has an abutment surface 77. The rotating disk 84 has a chamfered surface 87 parallel to the abutment surface 77 at a position facing it. The first plate portion 43a and the second plate portion 47a are brought closer together by springs 50 and 51.

[0078] By configuring the springs 50 and 51 to bring the first plate portion 43a and the second plate portion 47a closer together, the contact surfaces 77 of the constraint gears 71 and 83 abut against the chamfered surface 87. In this state, when the lifting shaft 29 rotates, the lifting shaft 29 applies a force to the pinion 33 in the same direction as its rotation. The pinion 33 applies a force to the rotating disk 84 in the same direction as its rotation, and applies a force to the constraint gears 71 and 83 meshing with the pinion 33 in the opposite direction to its rotation. The constraint gears 71 and 83 apply a force to the rotating disk 84 in the opposite direction to the rotation of the pinion 33 via the contact surfaces 77.

[0079] As described above, since the force in the same rotational direction as the rotation direction of the pinion gear 33 is applied to the rotation plate 84 from the pinion gear 33, and the force in the opposite rotational direction to the rotation direction of the pinion gear 33 is applied to the rotation plate 84 from the constraint gears 71 and 83, the force that rotates the rotation plate 84 applied to the rotation plate 84 can be canceled. That is, it is possible to constrain the rotational movement of the rotation plate 84. The state in which the rotational movement of the rotation plate 84 is constrained is referred to as a constrained state.

[0080] When the lifting shaft 29 starts the rotational movement in the constrained state, since the pinion gear 33 cannot perform the rotational movement, the pinion gear 33 moves in the up-and-down direction H along the groove 31a of the lifting shaft 29. When the pinion gear 33 moves upward in the up-and-down direction H, the pinion gear 33 comes into contact with the pressing surfaces 76 of the constraint gears 71 and 83, respectively, and moves the first plate portion 43a upward together with the constraint gears 71 and 83. Alternatively, when the pinion gear 33 moves downward in the up-and-down direction H, the pinion gear 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 through the link gears 52 and 53. With the movement of the first plate portion 43a, the constraint gears 71 and 83 are released. Thereby, the abutting surfaces 77 are not in contact with the chamfered surfaces 87, and the constrained state is released.

[0081] Thus, with one motor 21 possessed by the seat rotating device 100, it is possible to achieve the switching between the constrained state and the unconstrained state of the rotation plate 84 and the rotation of the rotation plate 84. Thereby, compared with the conventional seat member movable device, it is possible to provide the seat member movable device that is small in the number of members and light in weight. The embodiments of the present application have been described, but it should be understood that the embodiments disclosed this time are illustrative in all aspects and are not limited to the embodiments. The scope of the present application is indicated by the claims, and is intended to include all modifications equivalent in meaning and scope to the claims.

Claims

1. A seat component movable device that moves a seat component relative to a table, the seat component movable device comprising: a support disk that supports the seat component; and a drive device that moves the support disk, the drive device including a drive unit and a restriction unit, the drive unit having a motor, a lift shaft, and a pinion gear formed in a manner that enables the support disk to move, the lift shaft formed to extend in a first direction and formed to be rotatable by driving of the motor, the lift shaft having a support portion in which a groove is formed spirally, an insertion hole in which the lift shaft is inserted is formed in the center of the pinion gear, a guide corresponding to the spiral groove formed in the support portion is formed in an inner peripheral surface of the insertion hole, the restriction unit having a movable portion and a restriction portion, the movable portion having a first plate-shaped member, a second plate-shaped member, a spring, and a link gear, the first plate-shaped member and the second plate-shaped member arranged in the first direction with the pinion gear interposed therebetween, the spring connecting the first plate-shaped member and the second plate-shaped member and applying a force that brings the first plate-shaped member and the second plate-shaped member closer to each other to the first plate-shaped member and the second plate-shaped member, the link gear connecting the first plate-shaped member and the second plate-shaped member and formed to be able to transmit an action of bringing one of the first plate-shaped member and the second plate-shaped member closer to the other or an action of moving the one away from the other from the one to the other, the restriction portion formed to be able to restrict movement of the support disk, in a restricted state in which movement of the support disk is restricted by the restriction unit, the lift shaft is rotated by driving of the motor, whereby the pinion gear is moved in the first direction and one of the first plate-shaped member and the second plate-shaped member is moved in a direction away from the other, and the restricted state based on the restriction unit is released.

2. The seat component movable device according to claim 1, wherein the first plate-shaped member has a first plate portion, the second plate-shaped member has a second plate portion, the restriction portion has a first holding portion and a second holding portion, one end of the first holding portion is formed to be connected to the first plate portion, and the other end of the first holding portion is formed to extend toward the support disk in a second direction that intersects the first direction, one end of the second holding portion is formed to be connected to the second plate portion, and the other end of the second holding portion is formed to extend toward the support disk in the second direction, in the restricted state, the first holding portion and the second holding portion are interposed to the support disk.

3. The seat component movable device according to claim 2, wherein the support disk 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 provided to the main body portion, the first contact portion is formed to protrude in the first direction with respect to an inner peripheral edge portion of the main body portion and a vicinity thereof. the first holding portion has a first restriction surface provided on a surface facing the first contact portion in the first direction, the first restriction surface is formed so as to gradually move away from the support disc in the first direction as it moves from the first plate portion toward the first contact portion, the second contact portion is formed so as to protrude in the first direction with respect to an inner peripheral portion of the main body portion and a vicinity thereof, the second holding portion has a second restriction surface provided on a surface facing the second contact portion in the first direction, the second restriction surface is formed so as to gradually move away from the support disc in the first direction as it moves from the second plate portion toward the second contact portion.

4. The seat component movable device according to claim 1, wherein a chamfer surface is formed in the support disc, the restriction portion has a restriction gear, the restriction gear is provided between the first plate-shaped member and the second plate-shaped member and is formed so as to be movable in the first direction in accordance with movement of the first plate-shaped member, the restriction gear has a gear portion and an abutting portion, the gear portion is formed so as to extend in the first direction and is formed so as to be rotatable in a direction opposite to a rotation direction of the pinion gear in conjunction with the pinion gear, 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 chamfer surface, the abutting surface and the chamfer surface are in abutment in the restriction state of the restriction portion.

5. The seat component movable device according to any one of claims 1 to 4, wherein the support disc is formed in a ring shape, an inner diameter of the support disc is larger than a width of the support disc, the width of the support disc being a difference between an outer diameter and the inner diameter of the support disc, the drive device is located on an inner side of the support disc.

6. The seat component movable device according to any one of claims 1 to 3, wherein the support disc is formed in a ring shape, an inner diameter of the support disc is smaller than a width of the support disc, the width of the support disc being a difference between an outer diameter and the inner diameter of the support disc.

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