Seat drive device

Abstract

Seat drive device (40) with: a drive motor (41) with a single motor output shaft (42); a first position adjustment mechanism (M1, Ms) designed to receive an output from the drive motor (41) and to adjust the position of a first movement segment among numerous seat movement segments; a second position adjustment mechanism (M2, MI, Mr, Mt) designed to receive an output from the drive motor (41) and to adjust the position of a second movement segment from the numerous seat movement segments; a first actuating part which is arranged according to the first position adjustment mechanism (M1, Ms) and is designed to be actuated in order to be movable from an initial position to an adjusted position when the first position adjustment mechanism (M1, Ms) is actuated; a second actuating part which is arranged according to the second position adjustment mechanism (M2, MI, Mr, Mt) and is designed to be actuated in order to be moved from a starting position to an adjusted position when the second position adjustment mechanism (M2, MI, Mr, Mt) is actuated; a first coupling mechanism (461, 46S) which is arranged according to the first position adjustment mechanism (M1, Ms) and is designed to selectively connect an output shaft (47S) of the first coupling mechanism (461, 46S) which is connected to the first position adjustment mechanism (M1, Ms) and an input shaft (45a) of the first coupling mechanism (461, 46S) which is designed to be rotatable by the drive motor (41); a second coupling mechanism (462, 46L, 46R, 46T) which is arranged according to the second position adjustment mechanism (M2, MI, Mt, Mr) and is designed to selectively connect an output shaft (47L, 47R, 47T) of the second coupling mechanism (462, 46L, 46R, 46T) which is connected to the second position adjustment mechanism (M2, MI, Mt, Mr) and an input shaft (44a, 44b, 45b) of the second coupling mechanism (462, 46L, 46R, 46T) which is designed to be rotatable by the drive motor (41); a switch (580) designed to switch on the drive motor (41) with a polarity corresponding to an actuation direction of the first actuating part or the second actuating part according to the actuation of the first actuating part or the second actuating part; a first transmission part (62) designed to transmit an actuating force such that the first clutch mechanism (461, 46S) or the switch (580) is actuated and moved from the initial position to the adapted position in response to the actuation of the first actuating part; a second transmission part (52) designed to transmit an actuating force such that the second clutch mechanism (462, 46L, 46R, 46T) or the switch (580) is actuated and moved from the initial position to the adapted position in response to the actuation of the second actuating part; characterized by a first actuation restriction section (62d) provided on the first transmission part (62), and restricts actuation of the second actuation part to move from the initial position to the adapted position in a state in which the first actuation part has been actuated to move from the initial position to the adapted position and the first transmission part (62) has been actuated to move in response thereto; and a second actuation restriction section (52b to 52d) provided on the second transmission part (52), and restricts actuation of the first actuation part to move from the initial position to the adapted position in a state in which the second actuation part has been actuated to move from the initial position to the adapted position and the second transmission part (52) has been actuated to move in response thereto.

Description

TECHNICAL AREA

[0001] The disclosure relates to a seat drive device for selectively actuating multiple position adjustment mechanisms by a single drive motor. BACKGROUND

[0002] A seat drive device for selectively actuating multiple position adjustment mechanisms by a single drive motor is disclosed in JP 2013-107 624 A. According to such a seat drive device, four position adjustments (adjusting a seat forwards and backwards or longitudinally, and adjusting the seat up and down, adjusting the backrest angle, and adjusting the seat cushion tilt angle) can be performed using a single drive motor. Therefore, a clutch mechanism is provided in each drive train to distribute the drive motor's output to each position adjustment mechanism. The drive motor's output is then transferred to the corresponding position adjustment mechanism by engaging a clutch that matches the mechanism performing the position adjustment.On the other hand, the output of the drive motor is not transferred to the corresponding position adjustment mechanism by disengaging a clutch that belongs to a mechanism that does not perform the position adjustment.

[0003] Similarly, US 2006 / 0011005A1, which is considered the closest prior art against which claim 1 is defined, also discloses a seat drive device comprising a drive motor, a first and second position adjustment mechanism, a first and second actuating part, a first and second clutch mechanism including clutch drive devices, a switch, and a first and second transmission part with the corresponding features listed in the independent claims. A first and second actuating knob, a lifting clutch mechanism, and a backrest adjustment clutch mechanism are also disclosed in this document.

[0004] Although each position adjustment mechanism is, in principle, actuated individually, several position adjustment mechanisms can be actuated simultaneously, depending on the type of actuation. However, the drive motor's specifications are determined under the condition that it actuates one position adjustment mechanism at a time. Therefore, the problem arises that the drive motor becomes overloaded and the actuation speed decreases when multiple position adjustment mechanisms are actuated simultaneously. Brief explanation

[0005] The disclosure provides a seat drive device in which several position adjustment mechanisms are selectively actuated by a single drive motor, and which prevents several position adjustment mechanisms from being actuated simultaneously by making it impossible to perform an operation of simultaneous actuating several position adjustment mechanisms.

[0006] According to a first aspect of the disclosure, a seat drive device is created comprising: a drive motor having a single output shaft; a first position adjustment mechanism configured to receive an output from the drive motor and adjust the position of a first movement segment among numerous seat movement segments; a second position adjustment mechanism configured to receive an output from the drive motor and adjust the position of a second movement segment from the numerous seat movement segments; a first actuating element arranged corresponding to the first position adjustment mechanism and configured to be actuated to move from an initial position to an adjusted position when the first position adjustment mechanism is actuated;a second actuating part, arranged according to a second position adjustment mechanism and designed to be actuated to move from a starting position to an adjusted position when the second position adjustment mechanism is actuated; a first coupling mechanism, arranged according to the first position adjustment mechanism and designed to selectively connect an output shaft of the first coupling mechanism, which is connected to the first position adjustment mechanism, and an input shaft of the first coupling mechanism, which is designed to be rotated by the drive motor;a second clutch mechanism arranged corresponding to the second position-adjusting mechanism and configured to selectively connect an output shaft of the second clutch mechanism, which is connected to the second position-adjusting mechanism, and an input shaft of the second clutch mechanism, which is configured to be rotated by the drive motor; a switch configured to switch on the drive motor with a polarity corresponding to an actuation direction of the first actuating part or the second actuating part according to the actuation of the first actuating part or the second actuating part; a first transmission part configured to transmit an actuating force such that the first clutch mechanism or the switch is actuated and moved in response to the actuation of the first actuating part, which is actuated to move from the initial position to the adjusted position;a second transmission part designed to transmit an actuating force such that the second clutch mechanism or switch is actuated and moved in response to the actuation of the second actuating part, which is actuated to move from the initial position to the adapted position; a first actuation limiting section provided in the first transmission part which limits actuation of the second actuating part to move from the initial position to the adapted position in a state in which the first actuating part has been actuated to move from the initial position to the adapted position, and the first actuating part has been actuated to move in response thereto;and a second actuation restriction section provided on the second transmission part, which restricts the actuation of the first actuation part to move from the initial position to the adapted position in a state in which the second actuation part has been actuated to move from the initial position to the adapted position and the second transmission part has been actuated to move in response thereto.

[0007] According to the first aspect, the first actuation restriction section of the first gear part limits the actuation of the second gear part to move from its initial position to the adapted position in the same state in which the first actuation part was actuated to move from its initial position to the adapted position. Therefore, the second actuation restriction section cannot be moved from its initial position to the adapted position. Furthermore, the second actuation restriction section of the second gear part, in the same state in which the second actuation part was actuated to move from its initial position to the adapted position, limits the actuation of the first gear part to move from its initial position to the adapted position. Therefore, the first actuation part cannot be moved from its initial position to the adapted position.Therefore, only either the first actuating part or the second actuating part can be actuated; they cannot both be actuated simultaneously. Consequently, a defect in which multiple position adjustment mechanisms are actuated simultaneously by a single drive motor can be prevented.

[0008] According to a second aspect of the disclosure, the seat drive device according to the first aspect is provided, wherein the first transmission part and the second transmission part are arranged adjacent to each other, wherein the first restriction section is arranged in a movement range of the second actuation restriction section when the first transmission part is actuated to move, and wherein the second actuation restriction section is arranged in a movement range of the first actuation restriction section when the second transmission part is actuated to move, and restricts the actuation of the first transmission part to move.

[0009] In the second aspect, the first and second gear components can be formed by gears, connecting links, and the like. The first and second actuation limiting sections can be formed by projections, pins, levers, and the like. Furthermore, notches are formed on the outer surfaces of the first and second gear components, which have a positional relationship in which they are adjacent to and influence each other, such that this influence is prevented. The first and second actuation limiting sections can be provided at locations on the outer surfaces adjacent to the notches.

[0010] According to the second aspect, either the first or second actuation restriction section, provided on one of the first and second gear parts, is located within a partial range of motion of the other of the first and second gear parts when either the first or the second gear part is actuated, thus restricting the movement of the other of the first and second gear parts. Therefore, only one of the first and second actuation parts can be actuated at a time, and they cannot be actuated simultaneously. Consequently, it is possible to prevent a defect in which multiple position adjustment mechanisms are actuated simultaneously by a single drive motor.

[0011] According to a third aspect of the disclosure, the seat drive device is created according to the second aspect, wherein the first actuation restriction section is provided to project from an outer surface of the first transmission part in a direction that intersects a direction of motion actuation of the first transmission part, wherein the second actuation restriction section is provided to project from an outer surface of the second transmission part in a direction opposite the first actuation restriction section, wherein the first actuation restriction section and the second actuation restriction section are arranged such that motion trajectories for the first transmission part and the second transmission part, which are actuated to move, intersect each other, wherein the first actuation restriction section and the second actuation restriction section do not affect each other.when either the first gear part or the second gear part is actuated to move from a state in which neither the first gear part nor the second gear part has been actuated to move, and wherein the first actuation restriction section and the second actuation restriction section affect each other when one of the first gear part and the second gear part is actuated to move from a state in which one of the first gear part and the second gear part has been actuated to move.

[0012] According to the third aspect, one of the first and second actuation restriction sections, which are designed to protrude, is positioned at a location that intersects the movement trajectory of the other of the first and second actuation restriction sections. This other section is designed to protrude relative to the other of the first and second gear parts when one of them is actuated. Consequently, the actuation movement of the other of the first and second gear parts is restricted. Therefore, only the previously actuated part is actuated to move, and the movement of the later actuated part is restricted, even if the first and second actuation parts are actuated simultaneously. Thus, it is possible to prevent a defect in which multiple position adjustment mechanisms are actuated simultaneously by a single drive motor.

[0013] According to a fourth aspect of the disclosure, the seat drive device is provided according to the second aspect, wherein a first notch is formed on an outer surface of the first gear part adjacent to the second gear part, and the first actuation restriction section is provided adjacent to the first notch, wherein a second notch is formed on an outer surface of the second gear part adjacent to the first gear part, and the second actuation restriction section is provided adjacent to the second notch, wherein the first actuation restriction section and the second actuation restriction section are moved according to an actuation to move the first gear part and the second gear part and are arranged such that their motion trajectories overlap, wherein the first notch and the second notch, when one of the first gear part and the second gear part is actuated to move from a state,in which neither the first gear part nor the second gear part has been actuated to move, are moved from a state in which they are opposite each other, and one of the first actuation restriction section and the second actuation restriction section does not affect the other of the first actuation restriction section and the second actuation restriction section due to either the first notch or the second notch provided adjacent to the other of the first actuation restriction section and the second actuation restriction section, and wherein the first actuation restriction section and the second actuation restriction section are arranged to affect each other when one of the first gear part and the second gear part is actuated to move from a state in which either the first gear part or the second gear part has been actuated,in order to move.

[0014] According to the fourth aspect, both notches are positioned so that they are opposite each other in a state where the two gear components have not been actuated to move. Therefore, either of the two actuating components can be actuated to move. In a state where either of the two gear components has been actuated to move, one of the two notches is positioned to deviate from the other. Therefore, both actuation limiting components affect each other when the one that has not been actuated to move is actuated to move. In this way, only one of the first actuating component and the second actuating component can be actuated, but both cannot be actuated simultaneously. Consequently, it is possible to prevent a defect in which multiple position adjustment mechanisms are actuated simultaneously by a single drive motor.

[0015] According to a fifth aspect of the disclosure, the seat drive device according to the first aspect is created, further comprising: a connecting part provided between the first transmission part and the second transmission part, coupled to either the first transmission part or the second transmission part in such a way that it is actuated to move by receiving an actuating force from one of the first transmission part and the second transmission part, and arranged adjacent to another of the first transmission part and the second transmission part, wherein the first actuating limiting section is provided on the connecting part and prevents another of the first actuating part and the second actuating part from being actuated to move from the initial position to the adapted position in a state in which one of the first actuating part and the second actuating part has been actuated.to move from the initial position to the adapted position, and in which one of the first gear part and the second gear part was actuated to move in response thereto, and wherein the second actuation restriction section is provided on the other of the first gear part and the second gear part, and prevents one of the first actuating part and the second actuating part from being actuated to move from the initial position to the adapted position in a state in which the other of the first actuating part and the second actuating part was actuated to move from the initial position to the adapted position, and the other of the first gear part and the second gear part was actuated to move in response thereto.

[0016] In the fifth aspect, the first and second actuation restriction sections can be constructed using projections, pins, levers, and the like. Furthermore, notches are formed on the outer surfaces of the first and second gear components, which have a positional relationship in which they are adjacent and influence each other, to prevent such influence. The first and second actuation restriction sections can be located on the outer surfaces adjacent to these notches.

[0017] According to the fifth aspect, the first actuation restriction section is provided on the connecting part that is coupled to one of the two gear parts, and the second actuation restriction section is provided on the other of the two gear parts. Therefore, even if it is difficult to arrange both gear parts side by side, it is possible to realize a configuration in which the actuation of the other gear part is restricted by the first actuation part and the second actuation part when one gear part is actuated by the first actuation part and the second actuation part.

[0018] According to a sixth aspect of the disclosure, the seat drive device according to the fifth aspect is created, wherein a first notch is formed on an outer surface of the connecting part, which is adjacent to the other formed by the first gear part and the second gear part, and the first actuation limiting section is provided adjacent to the first notch, wherein a second notch is formed on an outer surface of the other formed by the first gear part and the second gear part, which is adjacent to the connecting part, and the second actuation limiting section is provided adjacent to the second notch, wherein the first actuation limiting section and the second actuation limiting section are moved in accordance with the connecting part, and the other formed by the first and second gear part is actuated to move, and is arranged such that their motion trajectories overlap, wherein,when either the first gear part or the second gear part is actuated to move from a state in which neither the first gear part nor the second gear part has been actuated to move, the first notch and the second notch are moved from a state in which they are opposite each other, and one of the first actuation restriction section and the second actuation restriction section does not affect the other of the first actuation restriction section and the second actuation restriction section due to the one of the first notch and the second notch that is adjacent to the other of the first actuation restriction section and the second actuation restriction section, and wherein the first actuation restriction section and the second actuation restriction section are arranged to affect each other,when another is actuated from the first and second gear parts to move from a state in which one from the first and second gear parts has been actuated to move.

[0019] According to the sixth aspect, in a state where neither actuation part has been applied to move, both notches are positioned opposite each other. Therefore, either actuation part can be applied to move. In a state where either actuation part has been applied to move, one of the notches is positioned differently from the other. Therefore, if either actuation limiter that has not been applied to move is applied, both limiting parts will affect each other. In this way, only one of the limiting parts can be applied at a time; both cannot be applied simultaneously. Thus, it is possible to prevent a defect in which multiple position adjustment mechanisms are actuated simultaneously by a single drive motor.

[0020] According to a seventh aspect of the disclosure, the seat drive device is created according to the first or second aspect, wherein the first position adjustment mechanism is a longitudinal adjustment mechanism designed to adjust a position of the seat relative to a floor in a forward and backward direction or longitudinal direction, wherein the second position adjustment mechanism is a tilt adjustment mechanism designed to adjust the height of a front section relative to a rear section of a seat cushion, or a lift adjustment mechanism designed to adjust a distance of the seat from the floor, and wherein both the first actuating part and the second actuating part are actuated by a single actuating knob and are actuated independently of each other due to a different actuating direction relative to the actuating knob.

[0021] If the first position adjustment mechanism and several adjustment mechanisms contained within the second position adjustment mechanism are actuated by a single operating knob, it is possible for multiple adjustment mechanisms to be actuated simultaneously against the operator's intention. According to the seventh aspect, the first actuation restriction section and the second actuation restriction section can prevent multiple adjustment mechanisms from being actuated simultaneously.

[0022] According to an eighth aspect of the disclosure, the seat drive device is created according to the first or second aspect, wherein the first position adjustment mechanism is a longitudinal adjustment mechanism designed to adjust a position of the seat in a longitudinal direction relative to the floor, wherein the second position adjustment mechanism is a tilt adjustment mechanism designed to adjust the height of a front section relative to a rear section of a seat cushion, a lift adjustment mechanism designed to adjust the height of the seat relative to the floor, or a backrest angle adjustment mechanism designed to adjust an inclination angle of a backrest relative to the seat cushion, wherein the first actuating part and the second actuating part are actuated.to move simultaneously with an adjustment process of the seat cushion or backrest through the first position adjustment mechanism and the second position adjustment mechanism, wherein the first gear part and the second gear part are rotating parts which rotate appropriately to convert the movement process of the first actuating part and the second actuating part into a rotary movement.

[0023] According to the eighth aspect, both the first and second gear sections are constructed using turned parts. Therefore, the first and second actuation restriction sections can be located between these turned parts, thus reducing their size.

[0024] According to a ninth aspect of the disclosure, the seat drive device is provided according to the eighth aspect, wherein the rotating parts forming the first gear part and the second gear part are arranged such that their surfaces overlap perpendicular to their axes of rotation, and wherein the first actuation restriction section and the second actuation restriction section are provided between the overlapping surfaces of the first actuation part and the second actuation part.

[0025] According to the ninth aspect, the first actuation restriction section and the second actuation restriction section are located between the overlapping surfaces of the rotating parts. Therefore, it is possible to construct the first actuation restriction section and the second actuation restriction section without increasing their size in any direction perpendicular to the axes of rotation of the rotating parts.

[0026] According to a tenth aspect of the disclosure, a seat drive device is provided in a seat, comprising numerous position adjustment mechanisms, including a first position adjustment mechanism and several second position adjustment mechanisms, wherein the seat drive device comprises: a drive motor having a single output shaft; numerous actuating parts, each individually arranged according to the numerous position adjustment mechanisms and designed to be actuated when the numerous position adjustment mechanisms are actuated, wherein the numerous actuating parts comprise: a first actuating part designed to be actuated to move from an initial position to an adjusted position when the first position adjustment mechanism is actuated;and several secondary actuating parts designed to be actuated individually in order to move from a starting position to an adapted position when the numerous position adjustment mechanisms are actuated;numerous coupling mechanisms, which are individually arranged to correspond to the numerous position-adjusting mechanisms and are designed to selectively connect or couple each output shaft of the numerous coupling mechanisms that is connected to the respective one from the numerous position-adjusting mechanisms, and each input shaft of the numerous coupling mechanisms that is designed to be rotated by the drive motor, wherein the numerous coupling mechanisms comprise: a first coupling mechanism that is connected to the first position-adjusting mechanism and causes the output shaft of the first coupling mechanism that is connected to the first position-adjusting mechanism and the input shaft of the first coupling mechanism to normally be in a connected state;and numerous secondary clutch mechanisms, each connected to the numerous secondary position-adjusting mechanisms, causing each output shaft of the numerous secondary clutch mechanisms, connected to the respective one from the numerous secondary position-adjusting mechanisms, and each input shaft of the numerous secondary clutch mechanisms to normally be in a non-connected or decoupled state; a switch configured to supply energy to the drive motor with a polarity matching an actuation direction of one of the numerous actuating parts, corresponding to the actuation of one of the numerous actuating parts; a first clutch actuating device to switch the output shaft and input shaft of the first clutch mechanism into a decoupled state;numerous secondary clutch actuation devices to individually switch each output shaft and each input shaft of each of the numerous secondary clutch mechanisms into a connected or coupled state; a cooperation part constructed to transmit an actuating force, transmitted from each of the numerous secondary actuating devices to each of the numerous secondary clutch actuation devices, to the first clutch actuating device; a transmission part constructed to transmit an actuating force such that the switch is actuated and moved in accordance with the actuation of the first actuating device to move it from the initial position to the adapted position;a first actuation restriction section provided on the transmission part, which restricts actuation from each of the second actuation parts to move from the initial position to the adapted position in a state in which the first actuation part has been actuated to move from the initial position to the adapted position, and the transmission part has been actuated to move in response; and a second actuation restriction section provided on the cooperation part, which restricts actuation of the first actuation part to move from the initial position to the adapted position in a state in which the second actuation part has been actuated to move from the initial position to the adapted position, and the cooperation part has been actuated to move in response.

[0027] According to the tenth aspect, one of the first and second limiting sections, provided on the cooperation part or the transmission part, restricts the operation of the other from the cooperation part and the transmission part when one of the first and second actuating parts is actuated. Therefore, it is possible to prevent a defect in which several position adjustment mechanisms are actuated simultaneously by a single drive motor. Furthermore, the operation of the numerous second actuating parts can be restricted by a single section for limiting the second actuation, because the section for limiting the second actuation is provided on the cooperation part.

[0028] According to an eleventh aspect of the disclosure, the seat drive device is created according to the tenth aspect, wherein the first actuation restriction section is provided to project from an outer surface of the transmission part in a direction that intersects a direction of motion actuation of the transmission part, wherein the second actuation restriction section is provided to project from an outer surface of the cooperation part in a direction opposite the first actuation restriction section, wherein the first actuation restriction section and the second actuation restriction section are arranged such that motion trajectories of the transmission part and the cooperation part, which are actuated to move, intersect each other, wherein the first actuation restriction section and the second actuation restriction section do not affect each other when one of the transmission part and the cooperation part is actuated.to move from a state in which neither the gear part nor the cooperation part is actuated to move, and wherein the first actuation restriction section and the second actuation restriction section influence each other when another of the gear part and the cooperation part is actuated to move from a state in which one of the gear part and the cooperation part has been actuated to move.

[0029] According to the eleventh aspect, one of the first and second actuation restriction sections, which are intended to protrude, is positioned in a way that intersects the movement trajectory of the other of the first and second actuation restriction sections, which are intended to protrude from the other of the gear part and the cooperation part, when one of the gear part and the cooperation part has been actuated. Consequently, the movement of the other of the gear part and the cooperation part is restricted. Therefore, only the part that is actuated earlier will be able to move, and the movement of the part that is actuated later will be restricted, even if both the first actuation section and the second actuation section are actuated simultaneously. Thus, it is possible to prevent a defect in which several position adjustment mechanisms are actuated simultaneously by a single drive motor.

[0030] According to a twelfth aspect of the revelation, a seat drive device is provided, comprising: a drive motor having a single output shaft; a stroke adjustment mechanism designed to receive an output from the drive motor and to adjust the height of a seat relative to a floor; a backrest angle adjustment mechanism designed to receive an output from the drive motor and to adjust the angle of inclination of a backrest relative to a seat cushion; a first actuating knob arranged to fit the stroke adjustment mechanism and designed to be actuated to move from a starting position to an adjusted position when the stroke adjustment mechanism is actuated;a second actuating knob, arranged to correspond to the backrest angle adjustment mechanism and designed to move from a starting position to an adjusted position when the backrest angle adjustment mechanism is actuated; a lifting coupling mechanism, arranged to correspond to the lifting adjustment mechanism and designed to selectively connect an output shaft of the lifting coupling mechanism, connected to the lifting adjustment mechanism, and an input shaft of the first coupling mechanism, designed to be rotatable by the drive motor; a backrest adjustment coupling mechanism, arranged to correspond to the backrest angle adjustment mechanism and designed to selectively connect an output shaft of the backrest adjustment mechanism, connected to the backrest angle adjustment mechanism, and an input shaft of the backrest coupling mechanism, designed to be rotatable by the drive motor;a switch designed to supply energy to the drive motor with a polarity corresponding to an actuation direction of the first or second actuation knob according to the actuation of the first or second actuation knob; a first gear element designed to transmit an actuating force such that the lifting clutch mechanism or the switch is actuated and moved from the initial position to the adjusted position in response to the actuation of the first actuation knob; a second gear element designed to transmit an actuating force such that the backrest adjustment clutch mechanism or the switch is actuated and moved from the initial position to the adjusted position in response to the actuation of the second actuation knob;a first actuation restriction section provided on the first gear part and preventing actuation of the second actuation knob to move from the initial position to the adapted position in a state in which the first actuation knob has been actuated to move from the initial position to the adapted position, and the first gear part has been actuated to move in response; and a second actuation restriction section provided on the second gear part and preventing actuation of the first actuation knob to move from the initial position to the adapted position in a state in which the second actuation knob has been actuated to move from the initial position to the adapted position, and the second gear part has been actuated to move in response, wherein the first actuation knob and the second actuation knob are arranged adjacent to each other.

[0031] If the first and second actuating knobs are arranged adjacent to each other, the probability of both actuating knobs being actuated simultaneously increases. According to the twelfth aspect, the simultaneous actuation of the first and second actuating knobs is prevented by the first and second actuating restriction sections. Therefore, it is possible to increase the degrees of freedom in the arrangement of the first and second actuating knobs. BRIEF EXPLANATION OF THE FIGURES Fig. Figure 1 is a perspective view of the vehicle front seat, on which a seat drive device according to a first embodiment of the disclosure is installed; Fig. Figure 2 is an enlarged front view of a main part of the first embodiment; Fig. 3 is an enlarged top view of a main part of the first embodiment; Fig. Figure 4 is an enlarged perspective view of a main part of the first embodiment; Fig. Figure 5 is a schematic explanatory system view of the first embodiment; Fig. Figure 6 is a schematic explanatory system view of a second embodiment of the disclosure; Fig. Figure 7 is a schematic explanatory system view of a third embodiment of the disclosure; Fig. Figure 8 is a schematic explanatory system view of a fourth embodiment of the disclosure, showing only one characteristic section; Fig. Figure 9 is an enlarged perspective view of a drive mechanism section of the first embodiment; Fig. Figure 10 is an enlarged perspective view of an actuation mechanism section in the first embodiment; Fig. Figure 11 is a perspective exploded view of the entire drive device in the first embodiment; Fig. Figure 12 is a perspective exploded view, similar to the one in Fig. 11, but from a different direction than in Fig. 11 seen; Fig. Figure 13 is an enlarged perspective view of a backrest adjustment knob in the first embodiment; Fig. Figure 14 is an enlarged perspective view of a longitudinal adjustment knob in the first embodiment; Fig. 15 is a perspective rear view of a switch cover of the first embodiment; Fig. Figure 16 is a perspective view to illustrate a process of assembling the actuating mechanism section on the switch cover in the first embodiment, showing a first sequence; Fig. Figure 17 is a perspective view to illustrate an assembly process similar to the one in Fig. 16, which shows a second sequence; Fig. Figure 18 is a perspective view to illustrate an assembly process similar to the one in Fig. 16, which shows a third sequence; Fig. Figure 19 is a perspective view to illustrate an assembly process similar to the one in Fig. 16, which shows a fourth sequence; Fig. Figure 20 is a perspective view to illustrate an assembly process similar to the one in Fig. 16, which shows a fifth sequence; Fig. Figure 21 is a perspective view to illustrate an assembly process similar to the one in Fig. 16, which shows a sixth sequence; Fig. Figure 22 is a perspective view to illustrate an assembly process similar to the one in Fig. 16, which shows a seventh sequence; Fig. Figure 23 is a perspective view to illustrate an assembly process similar to the one in Fig. 16, which shows an eighth sequence; Fig. Figure 24 is a perspective view to illustrate an assembly process similar to the one in Fig. 16, which shows a ninth sequence; Fig. 25 is an explanatory view to explain a switch actuation in processes other than the longitudinal adjustment process in the first embodiment; Fig. Figure 26 is an explanatory view to illustrate a switch actuation during the longitudinal adjustment process in the first embodiment; Fig. Figure 27 is a perspective view showing the relationship between a longitudinal adjustment gear and a trochoidal gear in the first embodiment; Fig. Figure 28 is a perspective view showing the relationship between the longitudinal adjustment gear and the trochoidal gear. Fig. Figure 27 shows a state in which the longitudinal adjustment gear is in a direction opposite to that in Fig. 27 is activated; Fig. Figure 29 is an enlarged perspective view of a center cam of a first embodiment; Fig. Figure 30 is an enlarged perspective view of a sliding connection in the first embodiment; Fig. Figure 31 is an enlarged front view showing a combined state of the center cam and the sliding connection; Fig. Figure 32 is an enlarged perspective view showing a combined state of the center cam and the sliding connection; Fig. 33 is an enlarged front view similar to the Fig. 31, which shows a state in which the center cam is actuated in one direction; Fig. 34 is an enlarged front view similar to the Fig. 31, which shows a state in which the center cam is actuated in the other direction; Fig. Figure 35 is an enlarged front view similar to the Fig. 31, which shows a state in which the sliding connection is actuated in one direction; Fig. 36 is an enlarged front view similar to the Fig. 31, which shows a state in which the sliding connection is actuated in the other direction; Fig. Figure 37 is an enlarged perspective view of a backrest adjustment drive gear in the first embodiment; Fig. Figure 38 is an enlarged perspective view of a backrest adjustment coupling pin in the first embodiment; Fig. Figure 39 is an enlarged front view showing a combined state of the backrest adjustment drive gear and the backrest adjustment coupling pin; Fig. 40 is an enlarged front view similar to the Fig. 39, which shows a state in which the backrest adjustment drive gear is operated in one direction; Fig. 41 is an enlarged front view similar to the Fig. 39, which shows a state in which the backrest adjustment drive gear is operated in the other direction; Fig. 42 is an enlarged front view similar to the Fig. 39, which shows a state in which the backrest adjustment coupling pin is actuated in one direction; Fig. 43 is an enlarged front view similar to the Fig. 39, which shows a state in which the backrest adjustment coupling pin is actuated in the other direction; and Fig. Figure 44 is a flow chart for the operation of the seat drive device according to the first embodiment. DETAILED EXPLANATION

[0032] The Fig. Figures 1 to 4 show a first embodiment of the disclosure. The first embodiment provides an example in which the seat drive device of the disclosure is used for a vehicle front seat 6 (hereinafter simply referred to as a "seat"). In each figure, the respective directions in the state in which the seat 6 is installed in a vehicle are indicated by arrows. The descriptions regarding these directions are given below based on these directions.

[0033] Fig. Figure 1 shows a view of seat 6. In seat 6, a backrest 8, forming a back support, is attached to the rear side of a seat cushion 7, which forms a seat section, in such a way that it can rotate freely backwards and forwards. Therefore, a backrest adjustment (not shown) for adjusting the backrest angle of the backrest 8 is provided at a hinge section between a rear section of the seat cushion 7 and a lower section of the backrest 8.

[0034] A headrest 9 for supporting part of the head of a seated occupant from behind is provided at an upper end section of the backrest 8. In addition, a right section of the seat cushion 7 and a lower section of the backrest 8 are covered by a side cover 10. A drive unit 40 for the seat drive unit is housed in the side cover 10. The drive unit 40 can adjust the seating position of an occupant sitting in the seat 6 according to the occupant's wishes. A sliding actuation knob 66 ​​and a backrest adjustment knob 67, which form an actuation part of the drive unit 40, are exposed on the outside of the side cover 10 so that they can be actuated by the seated occupant.

[0035] The seat 6 is attached to the vehicle floor in such a way that it can move freely forwards and backwards. Therefore, a pair of lower rails 1 are attached to the underside of the two left and both end sections of the seat cushion 7 on the vehicle floor. Upper rails 2 are then mounted into the lower rails 1 and are movable forwards and backwards, or longitudinally, relative to the lower rails 1. Brackets 3a and 3b are attached to each of the upper rails 2. The seat cushion 7 is attached to the brackets 3a and 3b by a front connection 4 and a rear connection 5, respectively. The front connection 4 and the rear connection 5 are foldable forwards and backwards relative to the brackets 3a and 3b. Therefore, the height of the seat 6 from the vehicle floor can be adjusted by changing the angle of the front connection 4 and the rear connection 5.

[0036] The Fig. Figures 2 to 4 show the assembly of a lower frame of the seat 6 together with the drive device 40. An adjusting nut element 11 is rotatably mounted in each of the left and right lower rails 1. Each adjusting nut element 11 has an internal thread extending longitudinally. Conversely, an adjusting guide screw (not shown) is mounted in each of the left and right upper rails 2, extending along the longitudinal direction of each upper rail 2. An external thread is formed on an outer circumference of the adjusting guide screw and is screwed into the internal thread of the adjusting nut element 11. Although not shown, a bevel gear drive is formed on an outer circumferential side of each adjusting nut element 11, and a bevel gear for changing direction, meshing with each bevel gear, is provided.Each bevel gear for changing direction is attached to each end section of an adjusting connecting rod 14 and is interconnected. At least the end sections of the adjusting connecting rod 14 have a polygonal column shape.

[0037] An adjustment gearbox 13 is coupled to a section between both ends of the adjustment connecting rod 14. (Not shown) meshing bevel gears, or a bevel gear drive, are installed in the adjustment gearbox 13. One of the bevel gears is mounted so that it rotates synchronously with the adjustment connecting rod 14, and the other is mounted so that it can be rotated by an adjustment torque cable 16 (described later).

[0038] When the adjusting torque cable 16 rotates, its rotation is transmitted via the adjusting gearbox 13 to the adjusting connecting rod 14. The rotation of the adjusting connecting rod 14 is then transmitted to the adjusting nut element 11. As the adjusting nut element 11 rotates, its rotation is converted into a forward and backward movement by the adjusting guide screw, which is screwed into the adjusting nut element 11, such that the longitudinal adjusting connecting rod 14 moves longitudinally. Here, the adjusting nut element 11, the adjusting guide screw, the adjusting gearbox 13, and the adjusting connecting rod 14, together with the lower rail 1 and the upper rail 2, form a longitudinal adjustment adjustment mechanism Ms. The longitudinal adjustment adjustment mechanism Ms adjusts the position of the seat 6 relative to the vehicle floor in the longitudinal direction.

[0039] The lower ends of the front connection 4 on each side are pivotally attached to the bracket 3a, and the upper ends of the same are pivotally attached to a front end section of a side frame 20, which forms a frame for the seat cushion 7. Furthermore, the lower ends of the rear connection 5 on each side are pivotally attached to the bracket 3b, and the upper ends of the same are pivotally attached to a rear end section of the side frame 20. Therefore, the top rail 2, the brackets 3a and 3b, the front connection 4, the rear connection 5, and the side frame 20 form a four-bar connection.

[0040] On the front face of the right rear connection 5, a sector gear section 5a is formed, which essentially widens in a wing shape around an axis of rotation on the side of the side frame 20. More precisely, the sector gear section 5a is separated from the rear connection 5 in a left and right direction and integrated into the rotating shaft. A lifting gear housing 21 is also provided on the side face of the side frame 20 adjacent to the right rear connection 5. The lifting gear housing 21 includes a speed reduction mechanism comprising a worm (not shown) and a worm wheel (not shown). A lifting pinion (not shown) is coaxially attached to the worm wheel. The lifting pinion meshes with the sector gear section 5a. The worm is then connected to an end section of a lifting torque cable 22 that extends forward from the lifting gear housing 21.

[0041] When the lifting moment cable 22 rotates, the rotation of the lifting moment cable 22 is transmitted to the worm gear, reduced by the worm wheel, and transmitted to the lifting pinion. The rotation of the lifting pinion is transmitted via the sector gear section 5a to the rear linkage 5 such that the rear linkage 5 rotates about its upper end. Therefore, the front linkage 4 and the rear linkage 5 form a four-rod connection that rotates about fixed points on the side of the brackets 3a, 3b such that the side frame 20 moves up and down relative to the brackets 3a, 3b. Here, the front linkage 4, the rear linkage 5, and the lifting gear housing 21, together with the brackets 3a, 3b, and the side frame 20, form a lifting adjustment mechanism MI, which is used to adjust the height. The lifting adjustment mechanism MI adjusts the height of the seat 6 relative to the vehicle floor.

[0042] On the front of the central sections in the longitudinal direction of the right and left side frames 20, a tilting arm 25, made of a sheet material, is attached such that it rotates freely about its rear end section. An upper end of a tilting connection (not shown) is rotatably connected to a front end section of each tilting arm 25, and a lower end of the tilting connection is coaxially rotatably attached to the upper end of the front connection 4.

[0043] On the front face of the right-hand tilting joint, a sector gear section (not shown) is formed, which essentially widens in a wing shape around a pivot axis at its lower end. A tilting gear housing 27 is also provided on the side face of the side frame 20 and is located adjacent to the right-hand tilting joint. The tilting gear housing 27 includes a speed reduction mechanism comprising a worm (not shown) and a worm wheel (not shown). A tilting pinion is coaxially attached to the worm wheel. The tilting pinion meshes with the sector gear section. Furthermore, the worm is attached to an end section of a tilting torque cable 28 that emerges from the rear of the tilting gear housing 27.

[0044] When the tilting moment cable 28 rotates, the rotation of the tilting moment cable 28 is transmitted to the worm gear, reduced by the worm wheel, and transmitted to the tilting pinion. The rotation of the tilting pinion is transmitted via the sector gear section to the tilting linkage, causing the tilting linkage to rotate about its lower end. This causes the tilting arm 25 to rotate about its rear end section, so that its front end section moves up and down. Therefore, the tilting angle of the tilting arm 25 increases or decreases relative to the side frame 20. Here, the tilting linkage and the tilting gear housing 27, together with the tilting arm 25 and the side frame 20, form a tilting adjustment mechanism Mt for adjusting the tilting position or inclination. The tilting adjustment mechanism Mt adjusts the height of the front section of the seat cushion 7 relative to the rear section.

[0045] A backrest adjustment plate 31, made of a sheet material, is attached to a rear end section of the side frame 20 on each side. A lower end section of the backrest 8 is coupled to the backrest adjustment plate 31 via a substantially disc-shaped backrest adjustment device 32. The backrest adjustment device 32 forms a well-known hypocycloid reduction gear. Although not shown, this implies that the backrest adjustment device 32 comprises a first disc, a second disc, a wedge, a cam, and the like. The first disc has internal teeth and is attached to the backrest adjustment plate 31. The second disc has external teeth, the number of which is less than that of the internal teeth, and which meshes with the internal teeth. The wedge maintains the eccentric state of the internal and external teeth such that these teeth are engaged.The camshaft is arranged coaxially with the first disc (internal gear), pivotally supports the second disc, and moves the wedge-shaped part. The backrest adjustment mechanism 32 is then attached to the backrest 8 via the second disc. In the backrest adjustment mechanism 32, the movement of the wedge-shaped part, corresponding to the rotation of the camshaft, causes the second disc to rotate while maintaining the meshing position of the internal and external gears. In this way, the rotation of the camshaft is converted into a rotational speed of the second disc during this revolution. The rotation of the second disc relative to the first disc then causes the backrest 8 to pivot (tilt) relative to the seat cushion 7.

[0046] A backrest adjustment gearbox housing 33 is attached to an outer surface of the backrest adjustment plate 31 on the right side. This backrest adjustment gearbox housing 33 includes a speed reduction mechanism comprising a worm (not shown) and a worm wheel (not shown). The worm wheel is connected to rotate together with a polygonal, column-like backrest adjustment connecting rod 34, which has an axis extending in a seat width direction and spanning the backrest adjusters 32 on both sides. This backrest adjustment connecting rod 34 passes through the backrest adjusters 32 on both sides and is connected to rotate together with the camshafts. On the other hand, the worm is attached to an end section of a backrest adjustment torque cable 35 that extends forward from the backrest adjustment gearbox housing 33.

[0047] When the backrest adjustment torque cable 35 rotates, its rotation is therefore reduced between the worm gear, which is an input side of the backrest adjustment gearbox housing 33, and the worm wheel, which is an output side of the same, and is transmitted to the backrest adjustment connecting rod 34. The rotation of the backrest adjustment connecting rod 34 is then transmitted to the camshafts of the backrest adjustments 32. In this way, as described above, the second disc of the backrest adjustment 32 is rotated relative to the first disc, and the backrest 8 is pivoted (tilted) relative to the seat cushion 7. Here, the backrest adjustment 32, the backrest adjustment gearbox housing 33, and the backrest adjustment connecting rod 34, together with the backrest adjustment plate 31 and the backrest 8, form a backrest adjustment angle adjustment mechanism Mr as a backrest adjustment position adjustment mechanism.The backrest adjustment angle adjustment mechanism Mr adjusts an inclination angle of the backrest 8 to the seat cushion 7.

[0048] As described above, the present embodiment is used for a so-called motor-adjustable 8-way seat, in which the position of the seat 6 can be adjusted forwards and backwards by the longitudinal adjustment mechanism Ms, the stroke adjustment mechanism MI, the tilt adjustment mechanism Mt, and the backrest angle adjustment mechanism Mr, respectively. Each seat movement segment of the seat 6 that is adjusted by each of these adjustment mechanisms Ms, MI, Mt, Mr corresponds to the seat movement segment of the disclosure. In particular, the seat movement segment adjusted by the longitudinal adjustment mechanism Ms corresponds to the first movement segment in the disclosure, and the seat movement segments adjusted by the stroke adjustment mechanism MI, the tilt adjustment mechanism Mt, and the backrest angle adjustment mechanism Mr correspond to the second movement segment in the disclosure.

[0049] The drive device 40 is attached to a central longitudinal section of the right side frame 20, which is located between the lifting gear housing 21 and the tilting gear housing 27. The drive device 40 comprises a drive motor 41 with a single output shaft. The output shaft of the drive motor 41 is connected to the adjustment torque cables 16, the lifting torque cable 22, the tilting torque cable 28, and the reclining adjustment torque cable 35 via a coupling mechanism as described later. Therefore, the actuation of the longitudinal adjustment mechanism Ms, the lifting adjustment mechanism MI, the tilting adjustment mechanism Mt, and the reclining angle adjustment mechanism Mr can be controlled by a single drive motor 41.

[0050] Fig. Figure 5 shows a schematic, explanatory system view of the seat drive device with the drive unit 40. Here, a first position adjustment mechanism MI is a position adjustment mechanism with a comparatively high adjustment frequency for the 8-way electrically adjustable seat 6. More precisely, the first position adjustment mechanism M1 refers to the longitudinal adjustment mechanism Ms. Furthermore, a second position adjustment mechanism M2 is a different position adjustment mechanism than the first position adjustment mechanism M1 in the 8-way seat. More precisely, the second position adjustment mechanism M2 refers to the lift adjustment mechanism MI, the tilt adjustment mechanism Mt, and the backrest angle adjustment mechanism Mr. Therefore, three position adjustment mechanisms are actually provided in parallel, although only a second position adjustment mechanism M2 is shown here.

[0051] The first position adjustment mechanism M1 is connected to an output shaft of the drive mechanism 41 via a first clutch mechanism 461. The second position adjustment mechanism M2 is also connected to the output shaft of the drive motor 41 via a second clutch mechanism 462. The first clutch mechanism 461 is normally engaged, i.e., without any special actuation of the seat drive device, and the second clutch mechanism 462 is normally disengaged. The first clutch mechanism 461 includes an adjacent first clutch drive unit 511. When the first clutch drive unit 511 is actuated, the first clutch mechanism 461 is disengaged. The second clutch mechanism 462 also includes an adjacent second clutch drive unit 512.When the second clutch drive unit 512 is actuated, the second clutch mechanism 462 is switched into a connected state.

[0052] The second clutch drive mechanism 512 is actuated from a starting position to an adapted position by actuating the second actuating part, which is operated in such a way that the second position-adapting mechanism M2 is actuated. Furthermore, the first clutch drive mechanism 511 is actuated by the second clutch drive mechanism 512 via the cooperation part 52. Therefore, the second clutch drive mechanism 512 is actuated, and the first clutch drive mechanism 511 is also actuated when the second actuating part is actuated. Consequently, the second clutch mechanism 462 is switched to the engaged state, and at the same time, the first clutch mechanism 461 is switched to the disengaged state when the second actuating part is operated.

[0053] When the second clutch actuation device 512 is actuated, the switching actuation device 580 is actuated via a delay mechanism, and a limit switch 59 is switched according to the direction of actuation of the second actuating element. Consequently, the drive motor 41 is operated, and the second position adjustment mechanism M2 is operated via the second clutch mechanism 462 according to the direction of actuation of the second actuating element. Simultaneously, the first position adjustment mechanism MI is not actuated, as the first clutch mechanism 461 is brought into a disengaged state as described above.Furthermore, when the limit switch 59 is switched, the switching actuation device 580 is actuated by the second clutch drive device 512 via the delay mechanism, and therefore the drive motor 41 is actuated after the second clutch mechanism 462 has been brought into the connected state and the first clutch mechanism 461 has been brought into the disconnected state. Therefore, it is possible to prevent a defect in which the drive motor 41 is actuated before the second clutch mechanism 462 has been switched into the connected state and the first clutch mechanism 461 into the disconnected state.

[0054] Furthermore, as described above, the actuating force of the second actuating part, which was transmitted to the clutch drive unit 512, is transmitted via the cooperation part 52 to the first clutch drive unit 511. Therefore, the actuation to bring the second clutch mechanism 462 into the engaged state and the actuation to bring the first clutch mechanism 461 into the disengaged state can be carried out in cooperation with each other and solely by actuating the second actuating part.

[0055] The first actuating element, which is activated to actuate the first position-adjusting mechanism M1, is coupled such that it directly actuates the switching actuator 580 without any delay. Therefore, the limit switch 59 is switched in accordance with the actuation direction of the first actuating element. During this time, the first actuating element and the first clutch drive unit 511 are not connected. Therefore, the limit switch 59 is switched by the switching actuator 580, and the drive motor 41 is actuated, when the first actuating element is switched from the initial position to the adjusted position. The power from the drive motor 41 actuates the first position-adjusting mechanism M1 via the first clutch mechanism 461, which is normally connected.

[0056] In this way, the first clutch drive unit 511 is not actuated and the first clutch mechanism 461 is held in the engaged state when the frequently used first position adjustment mechanism MI is actuated. Therefore, the deterioration of the first clutch mechanism 461 corresponding to the first position adjustment mechanism MI can be suppressed even if the first position adjustment mechanism MI is adjusted frequently.

[0057] A transmission part 620 is provided in a path in which the actuating force of the first actuating part is transmitted to the switching actuating device 580. The transmission part 620 is arranged adjacent to the cooperation part 52. Operating restriction sections are provided on adjacent sections of the transmission part 620 and the cooperation part 52. The operating restriction sections are formed by a first operating restriction section 620d, which is provided on a section of the transmission part 620 adjacent to the cooperation part 52, and a second operating restriction section 52e, which is provided on a section of the cooperation part 52 adjacent to the transmission part 620.When the first actuating element is actuated, and thus the gearing element 620 is moved, the first operating restriction section 620d of the gearing element 620 is located within a range of motion of the second operating restriction section 52e when the cooperation element 52 moves. Therefore, the movement of the cooperation element 52 is restricted by the first operating restriction section 620d. Consequently, the operation of the second actuating element, which is connected to the cooperation element 52, is restricted. Furthermore, the second operating restriction section 52e of the cooperation element 52 is located within a range of motion of the first operating restriction section 620d when the gearing element 620 is moving while the second actuating element is being operated, and thus the cooperation element 52 is moving. Therefore, the movement of the gearing element 620 is restricted by the second operating restriction section 52e.Consequently, the operation of the first operating part connected to the transmission part 620 is restricted.

[0058] Fig. Figure 6 shows a schematic, explanatory system view of a seat drive device according to a second embodiment. In the second embodiment, a first transmission part 621 is located in a path through which the actuating force of the first actuating part is transmitted to the shifting actuating device 580. Furthermore, a second transmission part 622 is located in a path through which the actuating force of the second actuating part is transmitted to the second clutch drive device 512. A first operating restriction section 621d and a second operating restriction section 622d are each provided on adjacent sections of the first transmission part 621 and the second transmission part 622, respectively.The first operating restriction section 621d is provided on a section of the first transmission part 621 adjacent to the second transmission part 622, and the second operating restriction section 622d is provided on a section of the second transmission part 622 adjacent to the first transmission part 621. The first operating restriction section 621d and the second operating restriction section 622d are provided in place of the first operating restriction section 620d and the second operating restriction section 622d, which are provided on the adjacent sections of the transmission part 620 and the cooperation part 52 in the first embodiment.

[0059] The functions of the first operating restriction section 621d and the second operating restriction section 622d in the second embodiment are completely identical to those of the first operating restriction section 620d and the second operating restriction section 622d in the first embodiment.

[0060] Fig. Figure 7 shows a schematic, explanatory system view of a seat drive device according to a third embodiment. In the third embodiment, the first clutch mechanism 461 is normally not connected. Therefore, the cooperation part 52 provided in the first and second embodiments is not included. The first actuating part is then configured to transmit its actuating force to the first clutch drive unit 511 and the switching actuating unit 580. However, the actuating force of the first actuating part is transmitted to the switching actuating unit 580 via a delay mechanism. Furthermore, the second actuating part is configured to transmit its actuating force to the second clutch drive unit 512 and the switching actuating unit 580. However, the actuating force of the second actuating part is also transmitted to the switching actuating unit 580 via a delay mechanism.

[0061] On the other hand, the first transmission part 621 lies in a path through which the actuating force of the first actuating part is transmitted to the first clutch drive unit 511. Furthermore, the second transmission part 622 lies in a path through which the actuating force of the second actuating part is transmitted to the second clutch drive unit 512. The first operating restriction section 621d and the second operating restriction section 622d are each provided on the adjacent sections of the first transmission part 621 and the second transmission part 622, respectively. The first operating restriction section 621d is provided on a section of the first transmission part 621 adjacent to the second transmission part 622, and the second operating restriction section 622d is provided on a section of the second transmission part 622 adjacent to the first transmission part 621.The first operating restriction section 621d and the second operating restriction section 622d are provided in place of the first operating restriction section 620d and the second operating restriction section 52e, which are provided in the adjacent sections of the transmission part 620 and the actuating part 52 in the first embodiment.

[0062] The functions of the first operating restriction section 621d and the second operating restriction section 622d in the third embodiment are absolutely identical to those of the first operating restriction section 620d and the second operating restriction section 52e in the first embodiment.

[0063] Fig. Figure 8 shows part of a schematic explanatory system view of a seat drive device according to a fourth embodiment. In the fourth embodiment, a connecting part 540 is provided between the first gear part 621 and the second gear part 622 in the second and third embodiments. If the first gear part 621 and the second gear part 622 are spaced apart from each other, the connecting part 540 serves to transmit the movement of the second gear part 622 to a position adjacent to the first gear part 621. Then, the first operating restriction section 621d and a second operating restriction section 540b are each provided on adjacent sections of the first gear part 621 and the connecting part 540, respectively.The first operating restriction section 621d is provided on a section of the first transmission part 621 adjacent to the connecting part 540, and the second operating restriction section 540b is provided on a section of the connecting part 540 adjacent to the first transmission part 621.

[0064] The functions of the first operating restriction section 621d and the second operating restriction section 540b in the fourth embodiment are absolutely identical to those of the first operating restriction sections 620d, 621d and the second operating restriction section 52e, 622d in each of the first to third embodiments.

[0065] Fig. Figures 9 to 12 show details of the drive device 40. The drive device 40 comprises a Fig. 9 shown drive mechanism part and one in Fig. Actuating mechanism part shown in 10. Meanwhile, in Fig. 10 The illustration of a switch cover 65, a sliding actuation knob 66 ​​and a backrest adjustment knob 67 has been omitted.

[0066] The drive mechanism part of the drive device 40 comprises a single drive motor 41. The drive motor 41 includes a single motor output shaft 42. A worm gear 43 is coupled to the motor output shaft 42. A pair of worm gears 44, 45, arranged in an upward and downward direction (or vertical direction), mesh with the worm gear 43. Therefore, the combination of the worm gear 43 with the worm gears 44, 45 causes a single-axis rotary output from the drive motor 41 to be converted into a two-axis rotary output.

[0067] Coupling mechanisms are coupled to both sides along the longitudinal direction of each rotating shaft of the worm gears 44, 45. That is, a tilting coupling mechanism 46T is coupled to an input shaft 44a on the front of the rotating shaft of the worm gear 44, and a tilting coupling mechanism 46R is coupled to an input shaft 44b on its rear. Furthermore, a sliding coupling mechanism 46S is coupled to an input shaft 45a on the front of the rotating shaft of the worm gear 45, and a lifting coupling mechanism 46L is coupled to an input shaft 45b on its rear.

[0068] A helical gear 48T is coupled to an output shaft 47T of the tilting clutch mechanism 46T. A helical gear (not shown) with an axis of rotation that intersects an axis of rotation of the helical gear 48T meshes with the helical gear 48T. The combination of the helical gear 48T and the helical gear (not shown) causes the axial direction of the output shaft 47T of the tilting clutch mechanism 46T to be converted or rotated.

[0069] Furthermore, a helical gear 48S is coupled to an output shaft 47S of the longitudinal adjustment clutch mechanism 46S. A helical gear 49S, with an axis of rotation oriented in a direction that intersects an axis of rotation of the helical gear 48S, meshes with the helical gear 48S. The combination of the helical gears 48S and 49S causes the axial direction of the output shaft 47S of the longitudinal adjustment clutch mechanism 46S to be converted or tilted. Meanwhile, the axial directions of an output shaft 47R of the backrest adjustment clutch mechanism 46R and an output shaft 47L of the lifting clutch mechanism 46L are not converted or tilted.

[0070] The sliding coupling mechanism 46S corresponds to the first coupling mechanism 461 described above and is normally in a connected state. The tilting coupling mechanism 46T, the lifting coupling mechanism 46L, and the backrest adjustment coupling mechanism 46R correspond to the second coupling mechanism 462 mentioned above and are normally in a disconnected state.

[0071] Elements such as the clutch mechanisms 46S, 46T, 46L, 46R, which form the drive mechanism part of the drive device 40, are housed in a gearbox housing half 50a. A gearbox housing half 50b covers the gearbox housing half 50a. The gearbox housing half 50a is combined with the gearbox housing half 50b to form a gearbox housing 50, which is a single housing (see Fig. 10).

[0072] The in Fig. The actuating mechanism part shown in Figure 10 is constructed such that the first clutch drive mechanism 511, the (not shown) second clutch drive mechanism 512, and the (not shown) shift actuating device 580 and the like are arranged on the right side of the gearbox housing half 50b (of the gearbox housing 50), and the shift cover 65 covers them (see Figure 10). Fig. 1) In addition, a longitudinal adjustment knob (which fits the first actuating part described above and also corresponds to the first actuating knob) 66 and a backrest adjustment knob (which corresponds to the second actuating part described above and also corresponds to the second actuating knob) 67 are arranged on the right side of the switch cover 65.

[0073] The Fig. Figures 10 to 12 show a detailed assembly of the actuating mechanism part of the drive device 40. A sliding coupling pin 51S, a tilting coupling pin 51T, a lifting coupling pin 51L and a backrest adjustment coupling pin 51R are arranged to match each of the coupling mechanisms 46S, 46T, 46L, 46R such that the gearbox housing half 50b lies between them (see Fig. 24 and Fig. 25). The sliding coupling pin 51S corresponds to the first coupling drive unit 511 described above. In addition, the backrest adjustment coupling pin 51R corresponds to the second coupling drive unit 512 described above.

[0074] When the sliding coupling pin 51S, the tilting coupling pin 51T, the lifting coupling pin 51L, and the backrest adjustment coupling pin 51R rotate, the corresponding coupling mechanisms 46S, 46T, 46L, and 46R are actuated into either the disengaged or engaged state. The tilting coupling pin 51T is driven by a tilting drive gear 55T, the lifting coupling pin 51L is driven by a lifting drive gear 55L, and the backrest adjustment coupling pin 51R is driven by a backrest adjustment drive gear 55R via a backrest adjustment gear 53. The lifting drive gear 55T is coupled to the longitudinal adjustment knob 66 ​​via a through hole 65c of the switch cover 65, the lifting drive gear 55L is coupled to the longitudinal adjustment knob 66 ​​via a through hole 65d of the switch cover 65, and the backrest adjustment drive gear 55R is coupled to the backrest adjustment knob 67 via a through hole 65e of the switch cover 65.Therefore, the tilt coupling pin 51T is rotated by the gear of the tilt drive gear 55T when a front end section of the sliding actuating knob 66 ​​is actuated to move vertically from a home position to an adjusted position. When a rear end section of the sliding actuating knob 66 ​​is actuated to move vertically from the home position to the adjusted position, the lifting coupling pin 51L is rotated by the teeth of the lifting drive gear 55L. When an upper end section of the longitudinal adjustment knob 67 is actuated to move from a home position to an adjusted position longitudinally, the backrest adjustment coupling pin 51R is rotated by the gear of the backrest adjustment drive 55R via the backrest adjustment gear 53.

[0075] The sliding actuation knob 66 ​​is fastened to a front end of a projection 55a of the tilting drive gear 55T and to a front end of a projection 55a of the lifting drive gear 55L by two screws 66a. The longitudinal adjustment knob 67 is also fastened to a front end of a projection 55a of the backrest adjustment drive gear 55R by a screw 67a. Knob covers 66b and 67b then cover the right side of the longitudinal adjustment knob 66 ​​and the backrest adjustment knob 67, respectively.

[0076] The sliding or longitudinally adjusting coupling pin 51S is coupled such that it is rotatably driven by a longitudinally adjusting connection 62 and a longitudinally adjusting gear 64. As in the Fig. 11 and Fig. Figure 16 shows a projection 64a of the longitudinal adjustment gear 64 coupled to the longitudinal adjustment knob 66 ​​in a state in which a gear section 64b of the longitudinal adjustment gear 64 engages with, or meshes with, a trochoidal gear 65a of the switching cover 65. In addition, a through-hole 62b of the longitudinal adjustment connection 62 is shown as in the Fig. 17 and Fig. Figure 18 shows the longitudinal adjustment gear 64 rotatably mounted on a projection 56c of an inner plate 56, and a projection 62a of the longitudinal adjustment linkage 62 is coupled by being mounted in a mounting hole 64c of the longitudinal adjustment gear 64 via a through hole 56a of the inner plate 56. Therefore, the longitudinal adjustment gear 64 oscillates in the longitudinal direction, and the longitudinal adjustment linkage 62 pivots about the projection 56c of the inner plate 56 as a result of the oscillation of the longitudinal adjustment gear 64 when the longitudinal adjustment knob 66 ​​is actuated for longitudinal adjustment. As shown in Fig. Figure 19 also shows a longitudinal adjustment pin gear section 51Sa mounted on the projection 56c of the inner plate 56. The longitudinal adjustment pin gear section 51Sa is coupled to the longitudinal adjustment linkage 62 in such a way that it pivots synchronously with the longitudinal adjustment linkage 62. In addition, as shown in the Fig. 11 and Fig. Figure 24 shows a longitudinal adjustment coupling pin engagement section 51Sb coupled to the left side of the longitudinal adjustment pin gear section 51Sa. When the longitudinal adjustment coupling pin engagement section 51Sb is pivoted by the longitudinal adjustment pin gear section 51Sa, the longitudinal adjustment coupling mechanism 46S is brought into the unconnected or decoupled state. The longitudinal adjustment coupling pin engagement section 51Sb is coupled to the longitudinal adjustment pin gear section 51Sa, thereby forming the longitudinal adjustment coupling pin 51S.

[0077] As in the Fig. 11, Fig. 21 and Fig. Figure 25 shows the longitudinal adjustment coupling pin, the tilt coupling pin 51T, the lifting coupling pin 51L, and the backrest adjustment coupling pin 51R arranged around the central cam 52. The central cam 52 is rotatably mounted by a projection 56d of the inner plate 56. The central cam 52 is the cooperating part in the disclosure. When one of the tilt coupling pins 51T, the lifting coupling pin 51L, or the backrest adjustment coupling pin 51R pivots, the central cam 52 also pivots in accordance with the pivoting, and the sliding or longitudinal adjustment coupling pin 51S, which engages in the central cam 52, is pivoted. Therefore, the sliding coupling pin 51S, which corresponds to the first coupling drive device 511, is actuated as described in Figure 25. Fig. 5 described via the central cam 52 is actuated to match the cooperation part when one of the tilting coupling pin 51T, the lifting coupling pin 51L and the backrest adjustment coupling pin 51R, which corresponds to the second coupling drive device, is pivoted.

[0078] As in the Fig. 11, Fig. 22, Fig. 23, Fig. 25 and Fig. As shown in Figure 26, a changeover sliding sleeve 57 and a normal changeover switch 58 are attached to a projection 56e of the inner plate 56 such that they are pivotably mounted therein, overlapping in the left and right directions. A connecting piece 57a of the changeover sliding sleeve 57 is capable of engaging in a cam or notch 62c of the longitudinal adjustment connection 62. When the longitudinal adjustment connection 62 is pivoted, the changeover sliding sleeve 57 is pivoted, and a projecting piece 57b of the changeover sliding sleeve 57 actuates one of the actuating pieces 59a of the limit switch 59 in accordance with the actuating direction of the sliding actuating knob 66.

[0079] On the other hand, a connecting piece 58a of the normal changeover switch 58 can engage in a notch 52a of the center cam 52. Therefore, the normal changeover switch 58 pivots, and a projecting piece 58b of the normal changeover switch 58 actuates one of the actuating pieces 59a of the limit switch 59 in the direction of actuation of one of the tilt coupling pins 51T, the lifting coupling pin 51L, and the backrest adjustment coupling pin 51R when the center cam 52 pivots. The width of the pivot direction of the notch 52a of the center cam 52 is set greater than the width in the pivot direction of the connecting piece 58a of the normal changeover switch 58. In this way, the Fig. 5 described delay setup configured (see Fig. 25). This is evident from the comparison of the width in the pivoting direction of the notch 62c of the longitudinal adjustment connection 62 with the width in the pivoting direction of the projecting piece 57b of the switching sliding sleeve 57 (see Fig. 26). Accordingly, the actuating elements 59a of the limit switch 59 are connected to the switching actuating device 580 via the slide connection 62 to the transmission part as with reference to Fig. As described in section 5, the longitudinal adjustment knob 66 ​​is actuated when the first actuating part is actuated to slide or to perform a longitudinal adjustment. Furthermore, the actuating elements 59a of the limit switch 59 are actuated according to the switching actuating device 580 via a connection from the tilt coupling pin 51T, the lifting coupling pin 51L and the backrest adjustment coupling pin 51R according to the second coupling drive device, and via the center cam 52 according to the cooperation part, when the actuating is carried out by a connection from the lifting adjustment mechanism M1, the tilt adjustment mechanism Mt and the backrest adjustment angle adjustment mechanism Mr according to the second actuating part.

[0080] The Fig. Figures 15 to 24 show a step in the assembly of each part mounted on the left surface of the shift cover 65 as described above. First, the longitudinal adjustment gear 64 is mounted as shown in the Fig. 15 and Fig. 16 is mounted such that the gear section 64b engages in the trochoidal gear 65a on the left surface of the shift cover 65. Simultaneously, the projection 64a of the longitudinal adjustment gear 64 passes through a through-hole 65b in the shift cover 65 and is, as described in the Fig. 11 and Fig. 14 shown coupled with the longitudinal adjustment knob 66.

[0081] Then the inner plate 56 is as shown in Fig. 17 is shown mounted by covering the longitudinal adjustment gear 64. The inner plate 56 is fastened to the left surface of the shift cover 65 by a screw 56b. Then the longitudinal adjustment linkage 62 is mounted as shown in Fig. 18 shown above the projection 56c of the inner plate 56. The backrest adjustment gear 53 is also mounted by a projection 65h of the shift cover 65. Furthermore, the longitudinal adjustment pin gear section 51Sa is mounted such that it overlaps the left side of the longitudinal adjustment connection 62, and the tilt coupling pin 51T, the backrest adjustment coupling pin 51R, and the lifting coupling pin 51L are mounted by projections 65f, 65g, and 65i of the shift cover 65. Additionally, a backrest adjustment locking preventer connection 54 is mounted via a projection 65j of the shift cover 65, and the backrest adjustment drive gear 55R is mounted in a position adjacent to the backrest adjustment locking preventer connection 54. At this time, the projection 55a of the backrest adjustment drive gear 55R extends as shown in the Fig. 11 and Fig. 13 shown through the through hole 65e of the switch cover 65 and is coupled to the backrest adjustment knob 67.

[0082] Furthermore, the center cam 52 is as in Fig. 21 shown above the projection 56d of the inner plate 56. Then the switching sliding sleeve 57 is as shown in Fig. 22 shown through the projection 56e of the inner plate 56, and the limit switch 59 is mounted on a lower section of the switch cover 65 such that it is opposite the projecting piece 57b of the changeover sliding sleeve 57. Then the normal changeover switch 58 is as shown in Fig. 23 is shown mounted so that it overlaps the left side of the switching sliding sleeve 57. Finally, the gearbox housing half 50b is mounted as shown in the Fig. 12 and Fig. Figure 24 shows the components placed on the left side of the shift cover 65, and each component mounted on the shift cover 65 is housed in the gearbox housing half 50b. From four through-holes 50S, 50T, 50L, 50R in the gearbox housing half 50b, the projections 51a of the longitudinal adjustment pin gear section 51Sa, the tilting coupling pin 51T, the lifting coupling pin 51L, and the backrest adjustment coupling pin 51R project to the left side of the shift cover 65. Furthermore, the longitudinal adjustment coupling pin engagement section 51Sb is coupled to the projection 51a of the longitudinal adjustment pin gear section 51Sa.

[0083] In the assembled state as described above, each of the projections 62d, 52b to 52d is formed at the distances between the longitudinal adjustment link 62 and the central cam 52, which are opposite and overlapping each other, as shown in the Fig. 29 and Fig. 30 shown. In addition, each of the notches 54a, 55b is shown on adjacent sections of the backrest adjustment locking prevention connection 54 and the backrest adjustment drive gear 55R as shown in the Fig. 37 and Fig. Figure 38 shows the following. The backrest adjustment locking mechanism 54 corresponds to the first gear part, and the backrest adjustment drive gear 55R corresponds to the second gear part. Furthermore, notch 54a corresponds to the first notch in the disclosure, and notch 55b corresponds to the second notch in the disclosure.

[0084] As described above, the longitudinal adjustment linkage 62 is pivoted when the longitudinal adjustment knob 66 ​​is actuated for longitudinal adjustment, and the center cam 52 is pivoted when the longitudinal adjustment knob 66 ​​or the backrest adjustment knob 67 is actuated and one of the tilt coupling pins 51T, the lifting coupling pin 51L, and the backrest adjustment coupling pin 51R is pivoted. In an initial state in which these actuations are not performed, the relationship between the center cam 52 and the longitudinal adjustment linkage 62 is in a position that is in the Fig. 31 and Fig. Figure 32 shows the state. When the longitudinal adjustment linkage 62 is pivoted in this state, the trajectories of the projections 52b to 52d and the trajectory of the projection 62d intersect when the central cam 52 is pivoted. The longitudinal adjustment linkage 62 corresponds to the first gear part or gear section in the disclosure, the central cam 52 corresponds to the second gear part or cooperation section in the disclosure, the projection 62d corresponds to the first actuation restriction section in the disclosure, and the projections 52b to 52d correspond to the second actuation restriction section in the disclosure.

[0085] The Fig. Figure 33 shows a state in which the central cam 52 is pivoted in a clockwise direction as indicated by an arrow. In this state, the projections 52c, 52d of the central cam 52 are located on both sides of the projection 62d of the longitudinal adjustment link 62. Therefore, the longitudinal adjustment link 62 cannot be pivoted in this state. Furthermore, Figure 33 shows Fig. 34 a state in which the central cam 52 is pivoted in the counterclockwise direction indicated by an arrow. In this state, the projections 52b, 52d of the central cam 52 are positioned on both sides of the projection 62d of the longitudinal adjustment connection 62. Therefore, the longitudinal adjustment connection 62 cannot be pivoted in this state. Thus, the longitudinal adjustment or displacement process of the longitudinal adjustment knob 66 ​​is prevented in a state in which the longitudinal adjustment knob 66 ​​or the backrest adjustment knob 67 is actuated and one of the tilt coupling pins 51T, the lifting coupling pin 51L, and the backrest adjustment coupling pin 51R is pivoted.

[0086] Fig. Figure 35 shows a state in which the longitudinal adjustment linkage 62 is pivoted in the clockwise direction indicated by an arrow. In this state, the projection 62d of the longitudinal adjustment linkage 62 is positioned between the projections 52c, 52d of the central cam 52. Therefore, the central cam 52 cannot be pivoted in this state. Furthermore, Figure 35 shows... Fig. 36 a state in which the longitudinal adjustment linkage 62 is pivoted counterclockwise as indicated by an arrow. Thus, the projection 62d of the longitudinal adjustment linkage 62 is positioned between the projections 52b, 52d of the center cam 52. Therefore, the center cam 52 cannot be pivoted in this state. This prevents any of the tilt coupling pins 51T, lifting coupling pins 51L, and backrest adjustment coupling pins 51R from being pivoted by actuating the longitudinal adjustment knob 66 ​​or the backrest adjustment knob 67 in a state in which the longitudinal adjustment knob 66 ​​is actuated for adjustment.

[0087] As described above, the backrest adjustment drive gear 55R pivots when the longitudinal adjustment knob 67 is actuated to tilt, and the backrest adjustment locking anti-rotation linkage 54 pivots when the longitudinal adjustment knob 66 ​​is actuated and the lifting coupling pin 51L pivots. In an initial state where the operations are not performed, the relationship between the backrest adjustment drive gear 55R and the backrest adjustment locking anti-rotation linkage 54 is in a Fig. 39 shown in the condition. In this condition, the notch 54a of the backrest adjustment locking prevention connection 54 and the notches 55b of the backrest adjustment drive gear 55R are arranged in positions opposite each other. Both sides of the notch 54a serve as a first actuation limitation section 54b, and both sides of the notch 55b serve as a second actuation limitation section 55c. Then, as if by a dashed line, they intersect in Fig. Figure 39 shows the trajectory of the first actuation restriction section 54b when the backrest adjustment locking prevention connection 54 is pivoted, and the trajectory of the second actuation restriction section 55c when the backrest adjustment drive gear 55R is pivoted. The lifting coupling pin 51L corresponds to one gear part of the disclosure, the backrest adjustment drive gear 55R corresponds to the other gear part of the disclosure, and the backrest adjustment locking prevention connection 54 corresponds to the connecting part of the disclosure.

[0088] Fig. Figure 40 shows a state in which the backrest adjustment drive gear 55R is pivoted in the counterclockwise direction indicated by an arrow. In this state, the second actuation limiting section 55c of the backrest adjustment drive gear 55R engages in the notch 54a of the backrest adjustment locking prevention connection 54. Therefore, the backrest adjustment locking prevention connection 54 cannot be pivoted in this state. Furthermore, Figure 40 shows... Fig. 41 a state in which the backrest adjustment drive gear 55R is pivoted in the clockwise direction indicated by an arrow. In this state, the second actuation limiting section 55c of the backrest adjustment drive gear 55R engages in the notch 54a of the backrest adjustment locking prevention connection 54. Therefore, the backrest adjustment locking prevention connection 54 cannot be pivoted in this state. In this way, the lifting coupling pin 51L is prevented from being pivoted by actuating the longitudinal adjustment knob 66 ​​in a state in which the backrest adjustment knob 67 is actuated to tilt and the backrest adjustment coupling pin 51R is pivoted.

[0089] Fig. Figure 42 shows a state in which the backrest adjustment locking mechanism 54 is pivoted in the clockwise direction indicated by an arrow. In this state, the first actuation restriction section 54b of the backrest adjustment locking mechanism 54 engages in the notch 55b of the backrest adjustment drive gear 55R. Therefore, the backrest adjustment drive gear 55R cannot be pivoted in this state. Furthermore, Figure 42 shows... Fig. 43 a state in which the backrest adjustment locking mechanism 54 is pivoted in the counterclockwise direction indicated by an arrow. In this case, the first actuation restriction section 54b of the backrest adjustment locking mechanism 54 engages in the notch 55b of the backrest adjustment drive gear 55R. Therefore, in this state, the backrest adjustment drive gear 55R cannot be pivoted. In this way, the tilting action of the backrest adjustment knob 67 is prevented in a state in which the longitudinal adjustment knob 66 ​​is actuated and the lifting coupling pin 51L is pivoted. In the Fig. For the sake of simplicity, hatching is shown in figures 39 to 43 to easily identify the positions of notches 54a and 55b.

[0090] Fig.Figure 44 explains the function of the actuating mechanism part in the first embodiment. That is, when the longitudinal adjustment knob 66 ​​is actuated to slide forwards and backwards, the longitudinal adjustment linkage 62 is pivoted over the longitudinal adjustment gear 64, and the switching sliding sleeve 57 is pivoted. Consequently, the limit switch 59 is activated and the drive motor 41 is actuated.

[0091] When the rear section of the longitudinal adjustment knob 66 ​​is actuated to move it vertically, the lifting coupling pin 51L pivots via the lifting drive gear 55L, and the lifting coupling mechanism 46L is brought into the engaged state. Simultaneously, the center cam 52 pivots when the lifting coupling pin 51L pivots, the longitudinal adjustment coupling pin 51L also pivots, and the longitudinal adjustment coupling mechanism 46S is brought into the disengaged state. At the same time, the limit switch 59 is activated via the normal changeover switch 58, and the drive motor 41 is actuated when the center cam 52 pivots.

[0092] When the front section of the sliding actuating knob 66 ​​is actuated to move upwards and downwards, the tilting coupling pin 51T pivots over the tilting drive gear 55T, and the tilting coupling mechanism 46T is brought into the engaged state. Simultaneously, the center cam 52 pivots as described above, and the longitudinal adjustment coupling mechanism 46S is brought into the disengaged state when the lifting coupling pin 51L pivots. At the same time, the limit switch 59 is activated, and the drive motor 41 is actuated.

[0093] When the backrest adjustment knob 67 is actuated to tilt, the backrest adjustment coupling pin 51R pivots via the backrest adjustment drive gear 55R, and the backrest adjustment coupling mechanism 46R is brought into the engaged state. Additionally, the center cam 52 pivots as described above, and accordingly, the longitudinal adjustment coupling mechanism 46S is brought into the disengaged state when the backrest adjustment coupling pin 51R pivots. Simultaneously, the limit switch 59 is activated and the drive motor 41 is actuated.

[0094] The first and second actuation restriction sections 62d, 52b, 52c, 52d are located between the longitudinal adjustment linkage 62 and the central cam 52. Only either the longitudinal adjustment linkage 62 or the central cam 52 may pivot; however, the longitudinal adjustment linkage 62 and the central cam 52 are prevented from pivoting simultaneously. Therefore, the movement of the front and rear sections of the longitudinal adjustment knob 66 ​​in the vertical direction and the tilting of the backrest adjustment knob 67 cannot be performed simultaneously with the longitudinal adjustment of the longitudinal adjustment knob 66.

[0095] The backrest adjustment locking mechanism 54 is located adjacent to the longitudinal adjustment drive gear 55R. The backrest adjustment locking mechanism 54 is designed to rotate in conjunction with the lifting coupling pin 51L. The first and second actuation restriction sections 54b and 55c are located between the backrest adjustment drive gear 55R and the backrest adjustment locking mechanism 54. Only either the backrest adjustment drive gear 55R or the backrest adjustment locking mechanism 54 may pivot, but simultaneous pivoting of the backrest adjustment drive gear 55R and the backrest adjustment locking mechanism 54 is prevented. Therefore, the movement of the rear section of the longitudinal adjustment knob 66 ​​in the vertical direction cannot be carried out simultaneously with the tilting process of the backrest adjustment knob 67.

[0096] Although specific embodiments have been described above, the disclosure is not limited to the appearances and configurations in these embodiments, and various modifications, additions, and omissions may be made without altering the underlying disclosure. For example, in the embodiments described above, the first and second actuation restriction sections between the central cam 52 and the longitudinal adjustment linkage 62 are constructed such that they combine the projections, and the first and second actuation restriction sections between the backrest adjustment drive gear 55R and the backrest adjustment locking prevention linkage 54 are constructed by means of the notch.However, the first and second actuation restriction sections between the center cams 52 and the longitudinal adjustment connection 62 can be constructed by means of the notch, and the first and second actuation restriction sections between the backrest adjustment drive gear 55R and the backrest adjustment locking prevention connection 54 can be constructed by combining the projections.

[0097] In the embodiments described above, the first and second actuation restriction sections are provided between the backrest adjustment drive gear 55R and the backrest adjustment locking prevention connection 54. However, instead of the backrest adjustment locking prevention connection (corresponding to the connecting part of the disclosure) 54, a lifting movement prevention connection (corresponding to the connecting part in the disclosure) can be provided, which rotates together with the backrest adjustment drive gear 55R, and the first and second actuation restriction sections can be provided between the lifting movement prevention connection and the lifting coupling pin 51L.

[0098] In the embodiments described above, the first and second actuation restriction sections are provided between the central cam 52 and the longitudinal adjustment connection 62. Here, the central cam 52 is locked to the longitudinal adjustment coupling pin 51R, the lifting coupling pin 51L, and the tilting coupling pin 51T. However, the first and second actuation restriction sections can also be provided between a suitable coupling pin formed from the coupling pins and the longitudinal adjustment connection 62.

[0099] In the embodiments described above, the first and second actuation restriction sections are provided adjacent to the notches. However, the first and second actuation restriction sections can, for example, be formed by projections that extend towards an outer circumferential side of the backrest adjustment drive gear 55R, without providing notches.

[0100] In the embodiments described above, the longitudinal adjustment mechanism Ms, the stroke adjustment mechanism MI, the tilt adjustment mechanism Mt, and the backrest angle adjustment mechanism Mr are provided as the first and second position adjustment mechanisms. However, any two position adjustment mechanisms from these adjustment mechanisms or other position adjustment mechanisms of the seat movement section can be combined.

[0101] In the embodiments described above, the disclosure is used for a vehicle seat. However, the disclosure can be used for a seat installed in an aircraft, ship, train, or the like, or for a seat installed indoors or outdoors. Reference symbol list 1 Underrails (drive underrails) 2 upper rails (adjustable rails) 3a, b Holder 4 front connection 5 rear connection 5a Sector gear section 6 seats 7 seat cushions 8 Backrest 9 Headrest 10 side cover 11 Adjusting nut element 13 Adjustable gearbox 14 Adjustable connecting rod 16 Adjustment torque cables 20 side frames 21 Hub gear housing 22 lifting moment cables 25 Tilting arm 27 Tilting gear housing 28 tilting moment cables 31 Backrest adjustment plate 32 Backrest adjustment device 33 Backrest adjustment gear housing 34 polygonal column-like backrest adjustment connecting rods 35 Backrest adjustment torque cable 40 Drive device 41 Drive motor 42 individual engine output shafts 43 Snail 44 pairs of worm gears 44a, b Input wave 45 pairs of worm gears 45a, 45b Input wave 46L lifting coupling mechanism 46R Backrest adjustment coupling mechanism 46S sliding coupling mechanism 46T tipping coupling mechanism 47L, R, S, T Output shaft 48S, T helical gear 49S helical gear 50 gearbox housings 50L, R, S, T through holes 50a, b Gearbox housing half 51B Tilting coupling pin 51L Lifting coupling pin 51R Backrest adjustment coupling pin 51S sliding coupling pin 51Sa Longitudinal adjustment pin gear section 51Sb Longitudinal adjustment coupling pin engagement section 51T tipping coupling pin 51a Projections 52 Cooperation part, second gear part, center cam 52a Notch 52b, c, d projections 52e second operating restriction section 53 Backrest adjustment gear 54 Backrest adjustment locking prevention connection 54a Notches 54b first section on activity restrictions 55 second section of activity restrictions 55L Lifting drive gear 55R Backrest adjustment drive gear 55T tilt drive gear 55a advantage 55b Notches 55c second section on activity restrictions 56 inner plate 56a Through hole 56b screw 56c, d, e advantage 57 Switching sliding sleeve 57a Connecting piece 57b preceding piece 58 Normal switch 58a Connecting piece 58b preceding piece 59 limit switches 59a Actuators 62 Cooperation part, second gear part, center cam 62a advantage 62b Through hole 62c cam, notch 62d lead 64 Longitudinal adjustment gear 64a advantage 64b Gear section 64c Mounting hole 65 Switch cover 65a Trochoidal gear 65b, c, d, e Through hole 65f, g, h, i, j advantage 66 Sliding operating knob 66a Screws 66b Knob covers 67 Backrest adjustment knob 67a screw 67b Knob cover 461 first coupling mechanism 462 second coupling mechanism 511 first clutch drive unit 512 second clutch drive unit 540 Connecting part 540b second section on activity restrictions 580 Switching device, switch 620 Gearbox part 620d first operating restriction section 621 first gearbox part 621d first section on activity restrictions 622 second gearbox part 622d second operating restriction section M1 first position adjustment mechanism M2 second position adjustment mechanism ML stroke adjustment mechanism Mr. Lehnenwinkelverstellmechanik Ms longitudinal adjustment mechanism Mt tilt adjustment mechanism

Claims

[1] Seat drive device (40) with: a drive motor (41) with a single motor output shaft (42); a first position adjustment mechanism (M1, Ms) designed to receive an output from the drive motor (41) and to adjust the position of a first movement segment among numerous seat movement segments; a second position adjustment mechanism (M2, MI, Mr, Mt) designed to receive an output from the drive motor (41) and to adjust the position of a second movement segment from the numerous seat movement segments; a first actuating part which is arranged according to the first position adjustment mechanism (M1, Ms) and is designed to be actuated in order to be movable from an initial position to an adjusted position when the first position adjustment mechanism (M1, Ms) is actuated; a second actuating part which is arranged according to the second position adjustment mechanism (M2, MI, Mr, Mt) and is designed to be actuated in order to be moved from a starting position to an adjusted position when the second position adjustment mechanism (M2, MI, Mr, Mt) is actuated; a first coupling mechanism (461, 46S) which is arranged according to the first position adjustment mechanism (M1, Ms) and is designed to selectively connect an output shaft (47S) of the first coupling mechanism (461, 46S) which is connected to the first position adjustment mechanism (M1, Ms) and an input shaft (45a) of the first coupling mechanism (461, 46S) which is designed to be rotatable by the drive motor (41); a second coupling mechanism (462, 46L, 46R, 46T) which is arranged according to the second position adjustment mechanism (M2, MI, Mt, Mr) and is designed to selectively connect an output shaft (47L, 47R, 47T) of the second coupling mechanism (462, 46L, 46R, 46T) which is connected to the second position adjustment mechanism (M2, MI, Mt, Mr) and an input shaft (44a, 44b, 45b) of the second coupling mechanism (462, 46L, 46R, 46T) which is designed to be rotatable by the drive motor (41); a switch (580) designed to switch on the drive motor (41) with a polarity corresponding to an actuation direction of the first actuating part or the second actuating part according to the actuation of the first actuating part or the second actuating part; a first transmission part (62) designed to transmit an actuating force such that the first clutch mechanism (461, 46S) or the switch (580) is actuated and moved from the initial position to the adapted position in response to the actuation of the first actuating part; a second transmission part (52) designed to transmit an actuating force such that the second clutch mechanism (462, 46L, 46R, 46T) or the switch (580) is actuated and moved from the initial position to the adapted position in response to the actuating of the second actuating part; characterized by a first actuation restriction section (62d) provided on the first transmission part (62), and restricts actuation of the second actuation part to move from the initial position to the adapted position in a state in which the first actuation part has been actuated to move from the initial position to the adapted position and the first transmission part (62) has been actuated to move in response thereto; and a second actuation restriction section (52b to 52d) provided on the second transmission part (52), and restricts actuation of the first actuation part to move from the initial position to the adapted position in a state in which the second actuation part has been actuated to move from the initial position to the adapted position and the second transmission part (52) has been actuated to move in response thereto. [2] Seat drive device (40) according to claim 1, wherein the first gear part (62) and the second gear part (52) are arranged adjacent to each other, wherein the first actuation restriction section (54a, 62d) is arranged in a range of motion of the second actuation restriction section (52b to 52d, 55c) and restricts actuation of the second gear part (52) to its movement when the first gear part (62) is actuated to move, and wherein the second actuation restriction section (52b to 52d) is arranged in a movement range of the first actuation restriction section (54a, 62d) and restricts actuation of the first gear part (62) to movement when the second gear part (52) is actuated to move. [3] Seat drive device (40) according to claim 2, wherein the first actuation restriction section (54a, 62d) is provided to project from an outer surface of the first gear part (62) in a direction that intersects a direction of movement actuation of the first gear part (62), wherein the second actuation restriction section (52b to 52d) is provided to project from an outer surface of the second gear part (52) in a direction opposite the first actuation restriction section (54a, 62d), wherein the first actuation restriction section (54a, 62d) and the second actuation restriction section (52b to 52d) are arranged such that motion trajectories corresponding to the first gear part (62) and the second gear part (52) which are actuated to move, intersect each other, wherein the first actuation restriction section (54a, 62d) and the second actuation restriction section (52b to 52d) do not affect each other when either the first gear part (62) or the second gear part (52) is actuated to move from a state in which neither the first gear part (62) nor the second gear part (52) has been actuated to move, and wherein the first actuation restriction section (54a, 62d) and the second actuation restriction section (52b to 52d) influence each other when one is actuated from the first gear part (62) and the second gear part (52) to move from a state in which the one from the first gear part (62) and the second gear part (52) has been actuated to move. [4] Seat drive device (40) according to claim 2, wherein a first notch (62c) is formed on an outer surface of the first transmission part (62) adjacent to the second transmission part (52), and the first actuation limiting section (54a, 62d) is provided adjacent to the first notch (62c), wherein a second notch (52a) is formed on an outer surface of the second gear part (52) adjacent to the first gear part (62), and the second actuation restriction section (52b to 52d) is provided adjacent to the second notch (52a), wherein the first actuation restriction section (54a, 62d) and the second actuation restriction section (52b to 52d) are moved according to an actuation to move the first gear part (62) and the second gear part (52) and are arranged such that their motion trajectories overlap, wherein the first notch (62c) and the second notch (52a) are moved from a state in which neither the first gear part (62) nor the second gear part (52) has been actuated to move, and the first actuation restriction section (54a, 62d) and the second actuation restriction section (52b to 52d) are not actuated to move, and one of the actuation restriction sections (54a, 62d) and the second actuation restriction section (52b to 52d) does not affect the other of the first actuation restriction section (54a, 62d) and the second actuation restriction section (52b to 52d) because there is one of the first notch (62c) and the second notch (52a) adjacent to the other of the first actuation restriction section (54a, 62d) and the second actuation restriction section (52b to 52d). 52d) is provided for, and wherein, when another is actuated from the first gear part (62) and the second gear part (52) to move from a state in which either the first gear part (62) or the second gear part (52) has been actuated to move, the first actuation restriction section (54a, 62d) and the second actuation restriction section (52b to 52d) are arranged to influence each other. [5] Seat drive device (40) according to claim 1, further comprising: a connecting part (540) provided between the first transmission part (62) and the second transmission part (52), is coupled to either the first transmission part (62) or the second transmission part (52) in such a way that it can be actuated to move by receiving an actuating force from either the first transmission part (62) or the second transmission part (52), and is arranged adjacent to another made of the first transmission part (62) and the second transmission part (52), wherein the first actuation restriction section (54a, 62d) is provided on the connecting part (540) and another from the first actuating part and the second actuating part prevents actuation to move from the initial position to the adapted position in a state in which one from the first actuating part and the second actuating part has been actuated to move from the initial position to the adapted position and the other from the first gear part (62) and the second gear part (52) has been actuated to move in response thereto, and wherein the second actuation restriction section (52b to 52d) is provided on the other from the first gear part (62) and the second gear part (52) and prevents the other from the first actuation part and the second actuation part from being actuated to move from the initial position to the adapted position in a state in which the other from the first actuation part and the second actuation part has been actuated to move from the initial position to the adapted position and the other from the first gear part (62) and the second gear part (52) has been actuated to move in response thereto. [6] Seat drive device (40) according to claim 5, wherein a first notch (62c) is formed on an outer surface of the connecting part (540) which is formed adjacent to the other from the first gear part (62) and the second gear part (52), and the first actuation limiting section (54a, 62d) is provided adjacent to the first notch (62c), wherein a second notch (52a) is formed on an outer surface of the other from the first gear part (62) and the second gear part (52), which is adjacent to the connecting part (540), and the second actuation limiting section (52b to 52d) is provided adjacent to the second notch (52a), wherein the first actuation restriction section (54a, 62d) and the second actuation restriction section (52b to 52d) are moved in accordance with the connecting part (540) and the other from the first gear part (62) and the second gear part (52) which are actuated to move, and are arranged such that their motion trajectories overlap each other, wherein the first notch (62c) and the second notch (52a) from a state in which they are opposite each other, and one from the first actuation restriction section (54a, 62d) and the second actuation restriction section (52b to 52d) does not affect the other from the first actuation restriction section (54a, 62d) and the second actuation restriction section (52b to 52d) because of the respective from the first notch (62c) and the second notch (52a) which are adjacent to the other from the first actuation restriction section (54a, 62d) and the second actuation restriction section (52b to 52d), when one from the first gear part (62) and the second gear part (52) is actuated to move from a state in which neither the first (62) nor the second gear part (52) has been actuated to move, and wherein the first actuation restriction section (54a, 62d) and the second actuation restriction section (52b to 52d) are arranged to influence each other when one of the first gear part (62) and the second gear part (52) is actuated to move from a state in which one of the first gear part (62) and the second gear part (52) has been actuated to move. [7] Seat drive device (40) according to claim 1 or 2, wherein the first position adjustment mechanism (M1) is a longitudinal adjustment adjustment mechanism (Ms) designed to adjust a position of the seat (6) relative to a floor in a longitudinal direction, wherein the second position adjustment mechanism (M2) is a tilt adjustment mechanism (Mt) designed to adjust the height of a front section relative to a rear section of a seat cushion (7), or a lift adjustment mechanism (MI) designed to adjust the height of the seat (6) above the floor, and wherein both the first actuating part and the second actuating part are actuated by a single actuating knob (66, 67) and are actuated independently of each other due to a different actuating direction relative to the actuating knob. [8] Seat drive device (40) according to claim 1 or 2, wherein the first position adjustment mechanism (M1) is a longitudinal adjustment adjustment mechanism (Ms) designed to adjust a position in a longitudinal direction of the seat (6) relative to a floor, wherein the second position adjustment mechanism (M2) is a tilt adjustment mechanism (Mt) designed to adjust the height of a front section relative to a rear section of a seat cushion (7), a lift adjustment mechanism (MI) designed to adjust the height of the seat (6) relative to the floor, or a backrest angle adjustment mechanism (Mr) designed to adjust the tilt angle of a backrest (8) relative to the seat cushion (7), wherein the first actuating part (66) and the second actuating part (67) are actuated to move simultaneously with an adjustment process of the seat cushion (7) or the backrest (8) through the first position adjustment mechanism (M1) and the second position adjustment mechanism (M2), and wherein the first gear part (62) and the second gear part (52) are rotating parts which rotate according to the conversion of the motion process of the first actuating part and the second actuating part into a rotary motion. [9] Seat drive device (40) according to claim 8, wherein the rotating parts forming the first gear part (62) and the second gear part (52) are arranged such that their surfaces overlap each other perpendicular to their axes of rotation, and wherein the first actuation restriction section (54a, 62d) and the second actuation restriction section (52b to 52d) are provided between the surfaces of the first rotating part and the second rotating part, which overlap each other. [10] Seat drive device (40) provided in a seat (6) comprising numerous position adjustment mechanisms (M1, M2) including a first position adjustment mechanism (M1, Ms) and numerous second position adjustment mechanisms (M2, MI, Mr, Mt), wherein the seat drive device (40) comprises: a drive motor (41) having a single motor output shaft (42); Numerous actuating parts, each individually arranged according to the multiple position adjustment mechanisms (M1, M2) and designed to be actuated in order to actuate the numerous position adjustment mechanisms (M1, M2), the numerous actuating parts comprising: a first actuating part designed to be actuated to move from an initial position to an adapted position in order to actuate the first position adjustment mechanism (M1, Ms); and numerous second actuating parts designed to be individually actuated to move from an initial position to an adapted position in order to actuate the numerous second position adjustment mechanisms (M2, MI, Mr, Mt); numerous coupling mechanisms (46L, 46R, 46S, 46T, 461, 462) which are individually arranged to match the numerous position adjustment mechanisms (M1, M2) and are designed to selectively connect each output shaft (47L, 47R, 47S, 47T) of the numerous coupling mechanisms (46L, 46R, 46S, 46T, 461, 462) which is connected to each of the numerous position adjustment mechanisms (M1, M2), and each input shaft (44a, 44b, 45a, 45b) of the numerous coupling mechanisms (46L, 46R, 46S, 46T, 461, 462) which is designed to be rotatable by the drive motor (41), wherein the numerous coupling mechanisms (46L, 46R, 46S, 46T, 461, 462) The following are included: a first coupling mechanism (461) connected to the first position adjustment mechanism (M1, Ms) and causing the output shaft (47S) of the first coupling mechanism (461), which is connected to the first position adjustment mechanism (M1, Ms), and the input shaft (45a) of the first coupling mechanism (461) to be in a connected state without special actuation of the seat drive device (40);and numerous second coupling mechanisms (462), each connected to the numerous second position adjustment mechanisms (M2), causing each output shaft (47L, 47R, 47T) of the numerous second coupling mechanisms (46L, 46R, 46T, 461, 462), which is connected to the respective of the numerous second position adjustment mechanisms (M2, MI, Mr, Mt), and each input shaft (44a, 44b, 45b) of the numerous second coupling mechanisms (46L, 46R, 46S, 46T, 462) to be in a disengaged state without special actuation of the seat drive device; a switch (58, 59) designed to supply energy to the drive motor (41) with a polarity that corresponds to an actuation direction of one of the numerous actuating parts, according to the actuation of one of the numerous actuating parts, a first clutch drive device (511) to switch the output shaft (47S) and the input shaft (45a) of the first clutch mechanism (461) into a disengaged state; numerous second clutch drive devices (512) to separately switch each output shaft (47L, 47R, 47T) into a connected state with one from each of the input shafts (45a, 45b) from the numerous second clutch drive devices (512); a cooperation part (52) which is designed to transmit an actuating force transmitted from each of the numerous second clutch drive units (512) to actuate each of the numerous second actuating parts to the first clutch drive unit (511); a gear part (62) designed to transmit an actuating force such that the switch (58, 59) is actuated and moved in accordance with the actuation of the first actuating part in order to move from the initial position to the adapted position; a first actuation restriction section (54a, 62d) provided on the transmission part (62) which restricts actuation from each of the second actuation parts to move from the initial position to the adapted position in a state in which the first actuation part has been actuated to move from the initial position to the adapted position and the transmission part (62) has been actuated in response to move; and a second actuation restriction section (52b to 52d) provided on the cooperation part (52) which restricts actuation to move the first actuation part from the initial position to the adapted position in a state in which the second actuation part (67) has been actuated to move from the initial position to the adapted position and the cooperation part (52) has been actuated to move in response thereto. [11] Seat drive device (40) according to claim 10, wherein the first actuation restriction section (54a, 62d) is provided to project from an outer surface of the gear part (62) in a direction that intersects a direction of movement actuation of the gear part (62), wherein the second operating restriction section (52b to 52d) is provided to project from an outer surface of the cooperation part (52) in a direction opposite the first operating restriction section (54a, 62d), wherein the first actuation restriction section (54a, 62d) and the second actuation restriction section (52b to 52d) are arranged such that motion trajectories of the gear part (62) and the cooperation part (52), which are actuated to move, intersect each other, wherein the first actuation restriction section (54a, 62d) and the second actuation restriction section (52b to 52d) do not affect each other when one of the gear part (62) and the cooperation part (52) is actuated to move from a state in which neither the gear part (62) nor the cooperation part (52) is actuated to move, and wherein the first actuation restriction section (54a, 62d) and the second actuation restriction section (52b to 52d) influence each other when one of the gear part (62) and the cooperation part (52) is actuated to move from a state in which one of the gear part (62) and the cooperation part (52) has been actuated to move. [12] Seat drive device (40) comprising: a drive motor (41) with a single motor output shaft (42); a stroke adjustment mechanism (MI) designed to receive an output from the drive motor (41) and to adjust the height of a seat (6) relative to the floor; a backrest adjustment angle adjustment mechanism (Mr) designed to receive an output from the drive motor (41) and to adjust an inclination angle of a backrest (8) relative to a seat cushion (7); a first actuating knob (66) which is arranged to fit the stroke adjustment mechanism (MI) and is designed to be actuated to move from a starting position to an adapted position in order to actuate the stroke adjustment mechanism (MI); a second actuating knob (67) which is arranged to match the backrest adjustment angle adjustment mechanism (Mr) and is designed to be actuated to move from a starting position to an adapted position in order to actuate the backrest adjustment angle adjustment mechanism (Mr); a lifting coupling mechanism (46L) which is arranged to match the lifting adjustment mechanism (MI) and is designed to selectively connect an output shaft (47L) of the lifting coupling mechanism (46L) which is connected to the lifting adjustment mechanism (MI) and an input shaft (45a) of the first coupling mechanism (461, 46S) which is designed to be rotatable by the drive motor (41); a backrest adjustment coupling mechanism (46R) which is arranged to fit the backrest adjustment angle adjustment mechanism (Mr) and is designed to selectively connect an output shaft (47R) of the backrest adjustment coupling mechanism (46R) connected to the backrest adjustment angle adjustment mechanism (Mr) and an input shaft (44a) of the backrest adjustment coupling mechanism (46R) which is designed to be rotatable by the drive motor (41); a switch (580) designed to supply energy to the drive motor (41) with a polarity corresponding to an actuation direction of the first actuating knob (66) or the second actuating knob (67) according to the actuation of the first actuating knob (66) or the second actuating knob (67); a first transmission part (62) designed to transmit an actuating force such that the lifting clutch mechanism (46L) or the switch (580) is actuated and moved from the initial position to the adapted position in response to the actuation of the first actuating knob (66); a second transmission part (52) designed to transmit an actuating force such that the backrest adjustment clutch mechanism (46R) or the switch (580) is actuated and moved in response to the actuation of the second actuating knob (67) to move from the initial position to the adjusted position; a first actuation restriction section (54a, 62d) provided on the first gear part (62) which prevents actuation of the second actuation knob (67) to move from the initial position to the adapted position in a state in which the first actuation knob (66) is actuated to move from the initial position to the adapted position, and the first gear part (62) has been actuated to move in response thereto; and a second actuation restriction section (52b to 52d) provided on the second transmission part (52) which prevents actuation of the first actuation knob (66) from the initial position to the adapted position in a state in which the second actuation knob (67) is actuated to move from the initial position to the adapted position and the second transmission part (52) has been actuated thereto to move in response, wherein the first actuating knob (66) and the second actuating knob (67) are arranged adjacent to each other.

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