SEAT ELEMENT MOTION DEVICE

Abstract

A movable device for a seat element (10) is disclosed, which moves a seat element (2) relative to a mounting base (9). The movable device for a seat element (10) comprises a support disk (14) that supports the seat element (2), a base (12) that supports the support disk (14) so ​​that it is movable relative to the mounting base (9), and a drive device (15) that moves the support disk (14). In a constrained state, in which the movement of the support disk (14) is constrained by a constraint unit (40), a pinion (33), when a lifting / lowering shaft (29) is rotated by driving a motor (21), moves in a first direction (H) and moves one of a first plate-shaped element (42) and a second plate-shaped element (46) away from each other in one direction to release the constraint state imposed by the constraint unit (40).

Description

REFERENCE TO RELATED REGISTRATIONS

[0001] This non-provisional application is based on Japanese patent application No. 2024-113318 or JP 2024-113 318 A, which was filed with the Japanese Patent Office on July 16, 2024, and the entire contents of which are hereby incorporated by reference. BACKGROUND Area of ​​the invention

[0002] The present disclosure relates to a seat element movement device. Explanation of the state of the art

[0003] For example, Chinese utility model no. 215921965 or CN 215 921 965 U discloses a seat element movement device that transfers a side impact load of a vehicle to a structural element of the seat element movement device in order to protect a battery from the side impact load of the vehicle.

[0004] The seat element movement device according to Chinese utility model CN ​​215 921 965 U comprises a fastening element, a rotating element, a locking mechanism, a release motor, a drive mechanism, and a drive motor. The rotating element is rotatably mounted on the fastening element. The rotating element is fixed to the fastening element by the locking mechanism.

[0005] When the rotating element is turned, the release motor first disengages the locking mechanism from the fixed position of the rotating element. Second, the drive motor rotates the rotating element via the drive mechanism. Third, the release motor secures the rotating element in place using the locking mechanism.

[0006] Since the seat element swivel device with such a design includes two motors, coordination in the control of the motors is required, which leads to a complicated structure as well as an increase in the number of components and an increase in weight. BRIEF EXPLANATION OF THE INVENTION

[0007] The present disclosure was made to solve the aforementioned problem, and its purpose is to provide a seat element motion device with fewer components and a lower weight than a conventional seat element motion device.

[0008] A seat element moving device according to a first aspect of the present disclosure is a seat element moving device that moves a seat element relative to a mounting base, wherein the element moving device comprises: a support disk that supports the seat element, a base that supports the support disk so that it is movable relative to the mounting base, and a drive device that moves the support disk. The drive device comprises a drive unit and a restraint unit. The drive unit has a motor, a pinion configured for moving the support disk, and a lifting / lowering shaft. The lifting / lowering shaft is configured to extend in a first direction and is rotatable by driving the motor. Furthermore, the lifting / lowering shaft has a support section in which a helical groove is formed.An insertion hole into which the lifting / lowering shaft is inserted is formed in the center of the pinion, and a guide is formed on an inner circumferential surface defining or limiting the insertion hole. This guide guide fits the helical groove formed in the support section. The limiting unit has a movable section and a limiting section. The movable section has a first plate-shaped element, a second plate-shaped element, a spring, and a locking gear. The first plate-shaped element and the second plate-shaped element are arranged in the first direction, with the pinion positioned between them. The spring connects the first plate-shaped element and the second plate-shaped element and exerts a force on both, drawing the first plate-shaped element closer to the second plate-shaped element.The locking gear connects the first and second plate-shaped elements and is designed to transmit the movement of one of the first and second plate-shaped elements towards or away from the other to the other. The limiting section is designed to limit the movement of the support disk. In a limited state, where the movement of the support disk is restricted by the limiting unit, the pinion moves in the first direction and moves one of the first and second plate-shaped elements away from the other in one direction to release the limited state imposed by the limiting unit when the lift / lower shaft is rotated by the motor drive.

[0009] In the seat element motion device according to the first aspect of the present disclosure, the first plate-shaped element has a first plate section, and the second plate-shaped element has a second plate section. The restraint section can have a first gripping section and a second gripping section. The first gripping section can have one end configured to be connected to the first plate section and another end configured to extend in a second direction intersecting the first direction toward the support disk. The second gripping section can have one end configured to be connected to the second plate section and another end configured to extend in a second direction toward the support disk.In the restricted section, the support disc can be arranged between the first gripping section and the second gripping section when the restricted state is in place.

[0010] In the seat element motion device according to the first aspect of the present disclosure, the support disc can have a main body section, a first contact section, and a second contact section. The first contact section and the second contact section can be arranged in the first direction and provided on the main body section. The first contact section can be configured to project in the first direction relative to an inner circumferential edge section of the main body section and its surroundings. The first gripping section can have a first confining surface arranged on a surface opposite the first contact section in the first direction. The first confining surface can be configured to be spaced from the support disc in the first direction along a direction from the first plate section to the first contact section.The second contact section can be configured to project in the first direction relative to the inner circumferential edge section of the main body section and its surroundings. The second gripping section can have a second confining surface located on a surface opposite the second contact section in the first direction. The second confining surface can be configured to be spaced from the support disk in the first direction along a line from the second plate section to the second contact section.

[0011] In the seat element motion device according to the first aspect of the present disclosure, a chamfered surface may be formed on the support disk. The limiting section comprises a limiting gear. The limiting gear may be arranged between the first plate-shaped element and the second plate-shaped element and may be configured to be movable in the first direction when the first plate-shaped element moves. The limiting gear comprises a gear section and a stop section. The gear section may be configured to extend in the first direction and may be configured to be rotatable in a direction opposite to a direction of rotation of the pinion in conjunction with the pinion. The stop section may be connected to one end of the gear section in the first direction. The stop section has a bearing surface opposite the chamfered surface.In the restricted section, the installation area can be in contact with the chamfered surface in a restricted state.

[0012] In the seat element movement device according to the first aspect of the present disclosure, the support disc can be annular. The inner diameter of the support disc can be 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 can be arranged inside the support disc.

[0013] In the seat element movement device according to the first aspect of the present disclosure, the support disc can be annular in shape. The inner diameter of the support disc can be smaller than the width of the support disc, which is the difference between the outer diameter and the inner diameter of the support disc.

[0014] The foregoing and other objectives, features, aspects and advantages of the present invention will become more apparent from the following detailed description of the present invention in conjunction with the accompanying drawings. BRIEF EXPLANATION OF THE FIGURES Fig. Figure 1 is a schematic view of a rotary seat according to the present embodiment. Fig. Figure 2 is a perspective view of a seat swivel device according to the present embodiment. Fig. Figure 3 is a perspective exploded view of the seat swivel device according to the present embodiment. Fig. Figure 4 is an enlarged perspective view of a drive device according to the present embodiment. Fig. 5 is an end view of a section along VV in Fig. 2. Fig. 6 is an end view of a section along VI-VI in Fig. 2. Fig. Figure 7 is a top view of a seat swivel device with a limiting section in a first modification of the present embodiment. Fig. 8 is an end view of a section along VIII-VIII in Fig. 7. Fig. Figure 9 is an end view of a section along IX-IX in Fig. 7. EXPLANATION OF THE PREFERRED EXECUTION FORMS

[0015] An embodiment of the present disclosure is described in detail below with reference to the figures. In the figures, identical or corresponding parts are designated by the same reference numerals, and their descriptions are not repeated.

[0016] Fig. Figure 1 is a schematic view of a rotary seat according to the present embodiment.

[0017] An up-down direction or vertical direction H in Fig. 1 is, for example, a vertical direction of a vehicle equipped with a swivel seat 1. A lateral direction W in Fig. 1 is a direction to the left and right side of the vehicle. A forward-reverse direction or longitudinal direction D in Fig. 1 is a longitudinal direction of the vehicle. Note that the up-down direction or vertical direction H is an example of the “first direction” in the present disclosure.

[0018] The swivel seat 1 comprises a seat body 2 and a seat swivel mechanism 10. The seat body 2 has a seat cushion 3 and a backrest 4. The seat cushion 3 supports the hips of an occupant. The backrest 4 supports the back of the occupant sitting on the seat cushion 3. The seat body 2 is mounted on a floor FL of the vehicle.

[0019] Note that the seat swivel device 10 is an example of the “seat element movement device” in the present disclosure. The seat main body 2 is an example of the “seat element” in the present disclosure.

[0020] The rotary seat 1 is supported by a bearing mechanism 5.

[0021] More precisely, the bearing mechanism 5 comprises a pair of sliding pieces 6 and a base plate 9. The pair of sliding pieces 6 is located on the base FL. The pair of sliding pieces 6 includes a sliding piece 6a and a sliding piece 6b. Sliding pieces 6a and 6b are arranged at a distance from each other in the lateral direction W. Sliding piece 6a comprises a lower rail 7a and an upper rail 8a. Sliding piece 6b comprises a lower rail 7b and an upper rail 8b. The lower rails 7a and 7b are attached to the base FL parallel to the longitudinal direction D. The upper rail 8a is designed above the lower rail 7a such that it is displaceable relative to the lower rail 7a in the longitudinal direction D. The same applies to the upper rail 8b. The upper rail 8a and the upper rail 8b support the base plate 9.

[0022] The base plate 9 is designed to connect the upper rail 8a and the upper rail 8b. The base plate 9 supports the seat swivel device 10.

[0023] With such a construction, the main seat body 2 is movable in the forward-backward direction D and rotatable relative to the base plate 9 by means of the seat swivel device 10. Note that the base plate 9 is an example of the "mounting base" in the present disclosure.

[0024] Fig. Figure 2 is a perspective view of the seat swivel device. The seat swivel device 10 comprises a (not shown) bracket 11, a base 12, a collar 13, a turntable 14, and a drive device 15.

[0025] Fig. Figure 3 is a perspective exploded view of the seat swivel device. Note that the swivel disc 14 is an example of the “support disc” of the present disclosure.

[0026] The bracket 11, the base 12, the collar 13, and the turntable 14 are arranged coaxially with respect to a rotational axis CL1. Note that the rotational axis CL1 is an axis located in the center of the turntable 14 and extending in the vertical direction H.

[0027] The base 12 is held in the vertical direction H by the bracket 11 and is attached to the in Fig. The base 12 is attached to the base plate 9 shown in Figure 1. The base 12 consists of four base sections 12a, 12b, 12c and 12d. The base sections 12a, 12b, 12c and 12d are arranged on a circle centered on the axis of rotation CL1 at intervals of 90 degrees.

[0028] The rotary disk 14 is mounted such that it can rotate relative to the base 12 in a direction orthogonal to the vertical direction H. The rotary disk 14 is annular in shape. The inner diameter of the rotary disk 14 is larger than a width of the rotary disk that corresponds to the difference between the outer diameter and the inner diameter of the rotary disk 14. The rotary disk 14 is an internal gear with teeth 14a formed on its inner circumferential surface. The rotary disk 14 has a seat-head mounting pin 18, which is designed to extend upwards to hold the seat-head 2 (see Fig. 1) The seat main body fastening pin 18 is formed from pins 18a, 18b, and 18c. The pins 18a, 18b, and 18c are arranged on an imaginary circle with pivot point CL1 at intervals of 120 degrees. The collar 13 is provided around the outer circumference of the rotating disk 14. The collar 13 is a plate-shaped element with an annular form.

[0029] Next, the drive device 15 will be described using the Fig. 4, Fig. 5 and Fig. 6 described. The drive device 15 has a Fig. 4 shown drive unit 20 and a housing 27, a cover 28, a bushing 32 and a Fig. 5 shown restriction unit 40 on.

[0030] First, in Fig. Figure 4 shows an enlarged perspective view of the drive device. Note that the representation of the housing 27, the cover 28, the socket 32 ​​and the limiting unit 40 in Fig. 4 is omitted.

[0031] With reference to Fig. 4 The drive device 15 is located inside the annular turntable 14. The drive unit 20 comprises a motor 21, a worm gear 22, a lifting / lowering shaft 29, and a pinion 33. The drive unit 20 is attached to the base plate 9 (not shown).

[0032] The motor 21 is supported by the (not shown) base plate 9.

[0033] The worm gear 22 is connected to the motor 21. The worm gear 22 has a worm 23 and a worm wheel 25.

[0034] The worm 23 is designed such that it extends in one direction orthogonal to the axis of rotation CL1. Teeth 23a are formed on the worm 23. The worm 23 is designed such that it can be rotated in a direction perpendicular to the axis of rotation CL1 by driving the motor 21.

[0035] The worm gear 25 has teeth 25a that fit the teeth 23a of the worm 23.

[0036] Secondly, it shows Fig. 5 an end view of a section along VV in Fig. 2. Note that a radial direction R1 in Fig. 5 is a radial direction of a rotation axis CL2 located in the center of the worm gear 25, and a direction parallel to a tangent to the rotary disk 14 at a point where the pinion 33 (see Fig. 4) touches the inner circumferential surface of the turntable 14.

[0037] With reference to Fig. 5 the worm gear 25 is designed such that it is driven by a rotary movement of the worm 23 (see Fig. 4) is rotatable in the same direction as the turntable 14. When the worm gear 25 is viewed in a top view from a position away from the worm gear 25 in the vertical direction H, an insertion hole 26 is formed in the center of the worm gear 25.

[0038] The housing 27 and the cover 28 are designed to cover the worm gear 22. The housing 27 is attached to the base plate 9 (not shown).

[0039] The lifting / lowering shaft 29 is designed to extend in the vertical direction H and is columnar in shape. The lifting / lowering shaft 29 is inserted into the insertion hole 26 of the worm gear 25. The lifting / lowering shaft 29 is arranged coaxially with the axis of rotation CL2 of the worm gear 25 and is designed to rotate synchronously with the rotation of the worm gear 25 in the direction of the axis of rotation CL2. The lifting / lowering shaft 29 comprises a base section 30 and a bearing section 31.

[0040] The base section 30 is inserted into the insertion hole 26 of the worm gear 25. One end of the base section 30 is supported by a bushing 32, which is supported by the housing 27. The other end of the base section 30 is supported radially to the axis of rotation CL2 by the cover 28.

[0041] The bearing section 31 is designed to extend in the vertical direction H. One end of the support section 31 is connected to an end section of the base section 30. A spiral groove 31a is formed on an outer circumferential surface of the support section 31.

[0042] Teeth 33a are formed on an outer circumferential surface of the pinion 33, which correspond to the teeth 14a (see Fig. 3) the rotary disk 14. An insertion hole 35 is formed in the center of the pinion 33. A guide 33b, which fits the groove 31a of the support section 31, is formed on an inner circumferential surface that delimits the insertion hole 35. The bearing section 31 of the lifting / lowering shaft 29 is inserted into the insertion hole 35.

[0043] The restriction unit 40 has a movable section 41 and a (not shown) restriction section 60.

[0044] The movable section 41 has a first plate-shaped element 42, a second plate-shaped element 46, springs 50 and 51, locking gears 52 and 53 and a stop or stop 54.

[0045] The first plate-shaped element 42 and the second plate-shaped element 46 are arranged in the vertical direction H, with the pinion 33 positioned between them. Note that the first plate-shaped element 42 is positioned above the second plate-shaped element 46 in the vertical direction H.

[0046] The first plate-shaped element 42 has a first plate section 43 and a pair of first side plate sections 44 and 45.

[0047] The first plate section 43 is designed such that it extends in the radial direction R1.

[0048] The pair of first side plate sections 44 and 45 is designed to extend in the vertical direction H. This pair of first side plate sections 44 and 45 is designed to hang down in the vertical direction H from the end faces of the first plate section 43, which is arranged in the radial direction R1. Thus, the two first side plate sections 44 and 45 are arranged in the radial direction R1. Teeth 44a and 45a are formed on the radially arranged side faces R1 of the two first side plate sections 44 and 45, respectively, which face the lifting / lowering shaft 29.

[0049] The second plate-shaped element 46 has a second plate section 47 and a pair of second side plate sections 48 and 49.

[0050] The second plate section 47 is designed such that it extends in the radial direction R1. The length of the second plate section 47 in the radial direction R1 is shorter than the length of the first plate section 43 in the radial direction R1.

[0051] The pair of second side plate sections 48 and 49 is configured to extend in the vertical direction H. This pair of second side plate sections 48 and 49 is configured to rise in the vertical direction H from the radially oriented end faces of the second plate section 47. Thus, the pair of second side plate sections 48 and 49 is arranged radially in the direction R1. In the pair of second side plate sections 48 and 49, teeth 48a and 49a are formed on the radially oriented side faces R1 that are opposite the lifting / lowering shaft 29. The pair of second side plate sections 48 and 49 is arranged between the first side plate section 44 and the first side plate section 45.

[0052] The spring 50 connects the first plate section 43 and the second side plate section 48 in the vertical direction H. Furthermore, the spring 51 similarly connects the first plate section 43 and the second side plate section 49 in the vertical direction H.

[0053] The locking gear 52 is located between the first plate-shaped element 44 and the second plate-shaped element 48. The locking gear 52 is designed to fit the teeth 44a and the teeth 48a. The locking gear 52 thus connects the first plate-shaped element and the second plate-shaped element.

[0054] The locking gear 53 is arranged between the first side plate section 45 and the second side plate section 49. The locking gear 53 is designed to mesh with the teeth 45a and the teeth 49a.

[0055] Thirdly, Fig. 6 an end view of a section along VI-VI in Fig. 2. A radial direction R2 in Fig. 6 is the radial direction of the axis of rotation CL2, which is located in the center of the worm gear 25, and is the same direction as a straight line passing through the axis of rotation CL1 (see Fig. 4) and the axis of rotation CL2 runs. The radial direction R2 is an example of the “second direction” in the present disclosure.

[0056] With reference to Fig. 6 the locking gear 52 (see Fig. 5) and the locking gear 53 (see Fig. 5) each is supported in the vertical direction H by a mounting plate 55. The mounting plate 55 is attached to the cover 28.

[0057] The stop 54 is arranged on an end section of the lifting / lowering shaft 29, which represents the other end relative to the bushing 32.

[0058] The restriction section 60 has a first gripping section 61 and a second gripping section 63.

[0059] The first gripping section 61 has one end configured to be connected to the first plate section 43, and the other end extending radially in direction R2 towards the turntable 14. The first gripping section 61 is arranged to cover an inner circumferential edge section 65a of the turntable 14 and its surroundings in the vertical direction H from above. The first gripping section 61 has a first limiting surface 62.

[0060] The first confinement surface 62 is arranged on one of the surfaces of the first gripping section 61 arranged in the vertical direction H in a position opposite the turntable 14. The first confinement surface 62 is designed such that it is spaced from the turntable 14 in the vertical direction H along a direction from the first plate section 43 in the radial direction R2 towards the turntable 14.

[0061] The second gripping section 63 is configured at one end to be connected to the second plate section 47, and at the other end to extend radially in direction R2 towards the turntable 14. The second gripping section 63 is arranged to cover the inner circumferential edge section 65a of the turntable 14 and its surroundings in the vertical direction H from below. The second gripping section 63 has a second limiting surface 64.

[0062] The second restraint surface 64 is arranged on one of the surfaces of the second gripping section 63 arranged in the vertical direction H, in a position opposite the turntable 14. The second restraint surface 64 is designed such that it is spaced from the turntable 14 in the vertical direction H along a direction R2 from the second plate section 47 in the radial direction R2.

[0063] The turntable 14 has a main body section 65, a first contact section 66, and a second contact section 67. The first contact section 66 and the second contact section 67 are arranged in the vertical direction H and are provided on the main body section 65. The first contact section 66 projects upwards in the vertical direction H relative to the inner circumferential edge section 65a of the main body section 65 and its surroundings. The second contact section 67 projects downwards in the vertical direction H relative to the inner circumferential edge section 65a of the main body section 65 and its surroundings. This forms a first boundary surface 62, which covers part of the first contact section 66. Furthermore, a second boundary surface 64 is formed, which covers part of the second contact section 67.

[0064] The swivel seat 10 in the embodiment described above has a limiting unit 40. The limiting unit 40 has the first plate-shaped element 42 and the second plate-shaped element 46, which are arranged vertically. The springs 50 and 51 connect the first plate section 43 of the first plate-shaped element 42 and the second plate section 47 of the second plate-shaped element 46 and exert a force that brings the first plate-shaped element 42 closer to the second plate-shaped element 46. Additionally, the first gripping section 61 and the second gripping section 63 are provided on the first plate section 43 and the second plate section 47, respectively.

[0065] In such a configuration, the first gripping section 61 and the second gripping section 63, which form the restraint section 60, hold the turntable 14 vertically H between them, thereby restricting or preventing its rotation. Furthermore, rattling of the turntable 14 vertically H or radially around the axis of rotation CL1 can be suppressed. Note that a state in which the rotation of the turntable 14 is prevented is referred to as a restraint state.

[0066] In the embodiment described above, the rotary disk 14 has a first contact section 66 and a second contact section 67, which project outwards from the main body section 65 in the vertical direction H. Furthermore, the first gripping section 61 and the second gripping section 63 each have a first limiting surface 62 and a second limiting surface 64, respectively. The first limiting surface 62 and the second limiting surface 64 are angled relative to a plane in which the rotary disk 14 rotates.

[0067] In such a configuration, the first confining surface 62, in the confined state, touches the first contact section 66 at a point or along a line. The same applies to the relationship between the second confining surface 64 and the second contact section 67. This allows the form tolerance of the rotary disk 14 to be compensated for.

[0068] In the embodiment described above, the guide 33b, which fits the groove 31a formed in the outer circumferential surface of the support section 31 of the lifting / lowering shaft 29, is formed on the inner circumferential surface of the insertion hole 35 of the pinion 33. The meshing gears 52 and 53 are designed such that they transmit the movement of at least one of the first plate-shaped elements 42 and second plate-shaped elements 46 in the vertical direction H away from or towards the other.

[0069] In such a configuration, the pinion 33 moves in conjunction with the rotation of the lifting / lowering shaft 29 in the vertical direction H, since the turntable 14 does not move in the restricted state. For example, when the pinion 33 moves upwards in the vertical direction H, it moves the first plate-shaped element 42 away from the second plate-shaped element 46. The movement of the first plate-shaped element 42 away from the second plate-shaped element 46 is also transmitted to the second plate-shaped element 46 via the locking gears 52 and 53, and the restricted state of the turntable 14 is released. After release, the pinion 33 begins a rotational movement about the axis of rotation CL2, and the turntable 14 is rotated by the pinion 33.In this way, a motor 21, which is contained in the seat swivel device 10, can switch the turntable 14 between a fixed state and a free state and rotate the turntable 14. This makes it possible to provide a seat element motion device with fewer components and a lower weight than a conventional seat swivel device.

[0070] In the present disclosure, the drive device 15 is arranged inside the turntable 14.

[0071] With such a setup, the height of the seat swivel device 10 can be reduced in the vertical direction H.

[0072] Although the embodiment described above illustrates the rotary disk 14 in the seat swivel device 10 as a representative example of the support disk in the present disclosure, the present disclosure is not limited thereto. For example, the support disk can be a lifting force mechanism in a seat height adjustment device or a force tilting mechanism in a tilt adjustment device. Furthermore, the support disk can be a pinion formed on a straight line.

[0073] Although the embodiment described above illustrates the vertical direction H as a representative example of the first direction in the present disclosure, the present disclosure is not limited to this. For example, the first direction may be defined as a direction orthogonal to a direction of movement of the support disk.

[0074] Although the embodiment described above illustrates the radial direction R2 as a representative example of the second direction in the present disclosure, the present disclosure is not limited to this. For example, the second direction can be defined as a direction orthogonal to the direction of movement of the support disk and the first direction.

[0075] Although the embodiment described above presents an example in which 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 present disclosure is not limited thereto. 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 and inner diameters of the turntable 14. This allows the outer diameter of the turntable 14 to be reduced and its manufacturability improved. Furthermore, an enlargement of the rotating seat 10 may be avoided. <Erste Modifikation>

[0076] Although the embodiment described above represents an example in which the restriction section 60 sandwich-like encloses the turntable 14 in the vertical direction H and thereby restricts the rotation of the turntable 14, the present disclosure is not limited to this. For example, the drive device 15 may have a restriction section 70 instead of the restriction section 60.

[0077] Fig. Figure 7 is a top view of a seat swivel device 100 with limiting section 70 in a first modification of the present embodiment, seen from a position remotely located in the vertical direction H. The seat swivel device 100 and its limiting section 70 have the same structures as the seat swivel device 10 and its limiting section 60 in the embodiment of the present disclosure, unless otherwise described below.

[0078] The limiting section 70 comprises a limiting gear 71, a limiting gear 83, and shafts 78. The limiting gear 71 and the limiting gear 83 are arranged between the first plate-shaped element 42 and the second plate-shaped element 46. The limiting gear 71 and the limiting gear 83 are arranged along a circumferential direction of an inner circumference of a rotary disk 84. The pinion 33 is arranged between the limiting gear 71 and the limiting gear 83.

[0079] Fig. 8 is an end view of a section along VIII-VIII in Fig. 7. Note that the cover is 28 in Fig. 8 is omitted.

[0080] The limiting gear 71 is designed to rotate about an axis of rotation CL3. The limiting gear 83 is designed to rotate about an axis of rotation CL4. Furthermore, the limiting gear 71 and the limiting gear 83 rotate in conjunction with the rotation of the pinion 33. Note that the limiting gear 71 and the limiting gear 83 rotate in a direction opposite to one direction of rotation of the pinion 33. The limiting gear 71 and the limiting gear 83 have essentially the same construction. The limiting gear 71 has an insertion hole 72. The insertion hole 72 extends in the vertical direction H. The limiting gear 71 has a gear section 73 and a stop section 74. The stop section 74 is connected to one end of the gear section 73 in the vertical direction H.

[0081] The gear section 73 is formed in the form of a column extending in the vertical direction H. The gear section 73 is located in the vertical direction H below the stop section 74. Teeth 73a are formed on an outer circumferential surface of the gear section 73. The teeth 73a are shaped to fit the teeth 33a of the pinion 33.

[0082] The stop section 74 is disc-shaped. One diameter of the stop section 74 is larger than one diameter of the gear section 73. The stop section 74 has a contact surface 75, a pressure surface 76, and a bearing surface 77. The contact surface 75 and the pressure surface 76 are arranged in the vertical direction H. Note that the pressure surface 76 is located below the contact surface 75. The bearing surface 77 connects an outer circumferential edge region of the contact surface 75 and an outer circumferential edge region of the pressure surface 76. The bearing surface 77 is designed such that it extends outwards from the center of the gear section 73 in the direction from the pressure surface 76 to the contact surface 75. The bearing surface 77 is located in a position facing a chamfered surface 87 described later (see Fig. 9).

[0083] The shaft 78 is designed to extend in the vertical direction H. The shaft 78 has a head section 79 and a shaft section 80. The head section 79 is located at one end of the shaft section 80. The shaft section 80 extends downwards from the head section 79 in the vertical direction H. A through-hole 81a and a through-hole 82a, designed to extend in the vertical direction H, are formed in a first plate section 43a and a second plate section 47a. The shaft section 80 projects through the holes 81a and 82a and is inserted into the insertion hole 72. The shaft 78 is designed to allow the limiting gear 71 to rotate.

[0084] Fig. Figure 9 is an end view of a section along IX-IX in Fig. 7.

[0085] The turntable 84 has a chamfered surface 87 that connects an inner circumferential surface 85 and a top surface 86. The chamfered surface 87 is designed such that it has the same inclination as the contact surface 77.

[0086] In the first modification of the embodiment described above, the limiting gear 71, the pinion 33, and the limiting gear 83 are arranged in that order along the circumferential direction of the inner circumference of the turntable 84. The limiting gear 71 and the limiting gear 83 each have a contact surface 77. The turntable 84 has a chamfered surface 87 at a position opposite the contact surface 77, which runs parallel to the contact surface 77. The springs 50 and 51 exert a force on the first plate section 43a and the second plate section 47a, which brings the first plate section 43a closer to the second plate section 47a.

[0087] In such a configuration, the contact surface 77 of each limiting gear 71 and each limiting gear 83 abuts the chamfered surface 87 due to the force of the springs 50 and 51, which bring the first plate section 43a closer to the second plate section 47a. When the lifting / lowering shaft 29 rotates in this state, it exerts a force in the same direction of rotation as its rotation towards the pinion 33. The pinion 33 exerts a force in the same direction of rotation as its own rotation on the rotary disk 84 and exerts a force in the opposite direction to its own rotation on the limiting gears 71 and 83 meshing with the pinion 33. The limiting gear 71 and the limiting gear 83 each exert a force on the rotary disk 84 via the contact surface 77 in the direction of rotation opposite to the direction of rotation of the pinion 33.

[0088] Because, as explained above, the force is exerted from pinion 33 onto the turntable 84 in the same direction of rotation as the direction of rotation of pinion 33, and the force exerted on the turntable 84 by limiting gear 71 and limiting gear 83 is exerted in the opposite direction of rotation to that of pinion 33, the forces exerted on the turntable 84 for its rotation can balance each other. That is, the rotational movement of the turntable 84 can be limited. A state in which the rotational movement of the turntable 84 is limited is called a limited state.

[0089] When the lifting / lowering shaft 29 begins a rotary movement in the restricted state, the pinion 33 cannot rotate and therefore moves vertically H along the groove 31a of the lifting / lowering shaft 29. When the pinion 33 moves upwards vertically H, it contacts the contact surface 76 of each limiting gear 71 and limiting gear 83 and moves the first plate section 43a upwards together with the limiting gear 71 and limiting gear 83. Conversely, when the pinion 33 moves downwards vertically H, it contacts the second plate section 47a, and the movement of the second plate section 47a away from the first plate section 43a is transmitted to the first plate section 43a by the locking gears 52 and 53. When the first plate section 43a moves, the limiting gear 71 and the limiting gear 83 move away from each other.This moves the mounting surface 77 away from the chamfer surface 87 and releases the locking state.

[0090] In this way, a motor 21, which is contained in the seat swivel device 100, can switch the turntable 84 between a restricted state and an unrestricted state and rotate the turntable 84. This makes it possible to provide a seat element motion device with fewer components and a lower weight than a conventional seat element motion device.

[0091] Although the embodiment of the present invention has been described, it should be understood that the embodiment disclosed herein is in every respect illustrative and not limiting. The scope of the present invention is defined by the scope of the claims and is intended to include all modifications within the scope and meaning equivalent to the scope of the claims. QUOTES INCLUDED IN THE DESCRIPTION

[0000] This list of documents cited by the applicant was automatically generated and is included solely for the reader's convenience. The list is not part of the German patent or utility model application. The DPMA accepts no liability for any errors or omissions. Cited patent literature

[0000] JP 2024-113 318 A

[0001] CN 215921965

[0003] CN 215 921 965 U [0003, 0004]

Claims

[1] Seat element movement device (10) which moves a seat element (2) relative to a mounting base (9), the element movement device comprising: a support disc (14) that supports the seat element (2); and a drive device (15) that moves the support disk (14), wherein the drive device (15) comprises a drive unit (20) and a restraint unit (40), the drive unit (20) comprises a motor (21), a pinion (33) designed to move the support disk (14), and a lifting / lowering shaft (29), the lifting / lowering shaft (29) is designed such that it extends in a first direction (H) and is designed such that it can be rotated by driving the motor (21), the lifting / lowering shaft (29) has a support section (31) in which a spiral groove (31a) is formed, in the middle of the pinion (33) an insertion hole (35) is formed into which the lifting / lowering shaft (29) is inserted, a guide (33b) is formed on an inner circumferential surface that limits the insertion opening (35), which fits the spiral groove (31a) formed in the confining section (31), the restriction unit (40) has a movable section (41) and a restriction section (60, 70), the movable section (41) comprises a first plate-shaped element (42), a second plate-shaped element (46), a spring (50, 51) and a locking gear (52, 53), the first plate-shaped element (42) and the second plate-shaped element (46) are arranged in the first direction (H), with the pinion (33) arranged between them, the spring (50, 51) connects the first plate-shaped element (42) and the second plate-shaped element (46) and exerts a force on the first plate-shaped element (42) and the second plate-shaped element (46) that brings the first plate-shaped element (42) closer to the second plate-shaped element (46), the locking gear (52, 53) connects the first plate-shaped element (42) and the second plate-shaped element (46) and is designed to transmit the movement of one of the first plate-shaped element (42) and the second plate-shaped element (46) towards or away from one of them to the other of them, the restriction section (60, 70) is designed to restrict movement of the support disk (14), and In a restricted state in which the movement of the support disk (14) is restricted by the limiting unit (40), the pinion (33) moves in the first direction (H) and moves one of the first plate-shaped element (42) and the second plate-shaped element (46) away from the other in one direction to release the state afflicted by the limiting unit (40) when the lifting / lowering shaft (29) is rotated by the drive of the motor (21). [2] Seat element movement device according to claim 1, wherein the first plate-shaped element (42) has a first plate section (43, 43a), the second plate-shaped element (46) has a second plate section (47, 47a), the restriction section (60) has a first gripping section (61) and a second gripping section (63), the first gripping section (61) has one end designed to be connected to the first plate section (43) and another end designed to extend in a second direction (R2) intersecting the first direction (H) towards the support disk (14), the second gripping section (63) has one end designed to be connected to the second plate section (47), and another end designed to extend in the second direction (R2) towards the support disk (14), and In the restricted state, the support disc (14) is arranged between the first gripping section (61) and the second gripping section (63). [3] Seat element movement device according to claim 2, wherein the support disc (14) has a main body section (65), a first contact section (66) and a second contact section (67), the first contact section (66) and the second contact section (67) are arranged in the first direction (H) and are provided on the main body section (65), the first contact section (66) is designed such that it projects in the first direction (H) relative to an inner circumferential edge section (65a) of the main body section (65) and its surroundings, the first gripping section (61) has a first confining surface (62) which is arranged on a surface which is opposite the first contact section (66) in the first direction (H), the first confining surface (62) is designed such that it is spaced apart in the first direction (H) along a direction from the first plate section (43) to the first contact section (66) from the support disk (14), the second contact section (67) is designed such that it projects in the first direction (H) relative to the inner circumferential edge section (65a) of the main body section (65) and its surroundings, the second gripping section (63) has a second confining surface (64) which is arranged on a surface that is opposite the second contact section (67) in the first direction (H), and the second confining surface (64) is designed such that it is spaced apart in the first direction (H) along a direction from the second plate section (47) to the second contact section (67) from the support disk (14). [4] Seat element movement device according to claim 1, wherein a chamfered surface (87) is formed on the support disc (14), the restriction section (70) has a restriction gear (71, 83), the limiting gear (71, 83) is arranged between the first plate-shaped element (42) and the second plate-shaped element (46) and is designed to be movable in the first direction (H) when the first plate-shaped element (42) moves, the limiting gear (71, 83) has a gear section (73) and a stop section (74), the gear section (73) is designed such that it extends in the first direction (H) and is designed such that it can be rotated in a direction opposite to the direction of rotation of the pinion (33) in engagement with the pinion (33), the stop section (74) is connected to one end of the gear section (73) in the first direction (H), the stop section (74) has a contact surface (77) which is opposite the chamfered surface (87), and In the restricted section (70) the facility area (77) is in a restricted state adjacent to the chamfered surface (87). [5] Seat element movement device according to one of claims 1 to 4, wherein the support disc (14) is ring-shaped, an inner diameter of the support disc (14) is larger than a width of the support disc (14), which is a difference between an outer diameter and the inner diameter of the support disc (14), and the drive device (15) is arranged inside the support disc (14). [6] Seat element movement device according to one of claims 1 to 3, wherein the support disc (14) is ring-shaped and an inner diameter of the support disc (14) is smaller than a width of the support disc (14), which is a difference between an outer diameter and the inner diameter of the support disc (14).

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