JPH0751098B2 - Driving device for actuated member with respect to base - Google Patents

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a drive device for driving an actuated member with respect to a base, and particularly, this actuated member having a linear or curved shape. The present invention relates to a driving device for reciprocating driving.

(Prior Art) A large number of various driving devices have been proposed as a driving device for linearly or curvedly reciprocatingly driving an actuated member with respect to a base. However, in this type of drive device that has been already proposed in the related art, there is a sense of "how to drive the actuated member", but when the drive device cannot be used and the actuated member is Often no intention is used that it may have to be moved.

For example, in a reclining seat used in a vehicle such as a vehicle or an aircraft, a drive device may be attached to the back seat for driving the seat.
The back seat of this reclining seat has its inclination accuracy changed according to the condition or preference of the person using it, but this angle change of the back seat is generally performed by the support arm of the back seat (here, This is performed by reciprocating the actuated member) by a driving device.

However, the conventional drive device has not been proposed as having all of the following conditions. The condition is that it is fully automated and does not require any manual operation.

Being compact and integrated, it can be stored in a narrow space.

It can be applied as it is to drive an actuated member such as a back seat of an existing reclining seat without changing the periphery of the actuated member as it is.

In an emergency, it should be possible to operate by simply applying force to the actuated member side, regardless of the drive device.

Is.

In particular, "in an emergency, regardless of the drive device,
It is important to be able to operate by simply applying force to the actuated member side. " Considering this concretely in the case of a reclining seat, when a vehicle such as a vehicle or an aircraft equipped with this reclining seat is in an accident or the like and it is necessary to escape from the vehicle, the reclining seat is configured. The back sheet that is doing may interfere with the escape.
However, if the vehicle encounters an accident or the like, the power supply for the drive device is cut off and the drive device cannot be driven, and the back seat cannot be tilted out of the way. In other words, as described above, "I have no intention of using the drive unit when the drive unit cannot be used and need to move the actuated member." There is no alternative but to make emergency escape impossible.

The above can be said for an automatic door, for example. If a power failure occurs due to an earthquake or the like, the drive device that drives this automatic door will not work, but in such a case, it is often necessary to open the automatic door urgently. Still, the automatic doors cannot be opened due to the useless drive being turned off.

Therefore, the inventors have also taken into consideration that the driven member may have to be moved even when the drive device cannot be used, that is,
The present invention has been completed as a result of research to complete a driving device that satisfies all of the above conditions.

(Problems to be Solved by the Invention) The present invention has been made based on the above circumstances,
The problem to be solved is that the conventional drive device does not satisfy all the above conditions (1) to (3). And
An object of the present invention is to provide a drive device that can satisfy all of the above conditions (1) to (3).

(Means for Solving the Problems) In order to solve the above problems, the means according to the first aspect of the present invention adopts a seat (210) as a “base” and an “actuated member”. The case where the back seat (220) is adopted will be described with reference to the drawings corresponding to the embodiment. "The support arm (221) of the back seat (220) is rotatably connected to the seat (210) side, In a drive device in which a screw rod (10) is arranged between the lower end of the support arm (221) and the seat side and the screw rod (10) is moved back and forth to tilt the back seat (220). A mounting base (20) that swingably supports the drive unit on the seat (210) side, and a rotation nut that is rotatably provided on the mounting base (20) and constitutes a ball screw together with the screw rod (10). (31) and this rotating nut (31 A power transmission shaft (32a) having a gear (32) fixed to be directly meshed with the screw rod, arranged parallel to the screw rod (10) at one end, and having a gear (32) rotatably interposed at the other end. And the drive shaft (44) meshes with the gear (32) interposed at the other end of the power transmission shaft (32a) and is arranged parallel to the screw rod (10), and the drive shaft is provided by the electromagnetic brake (41). The drive motor (40) for stopping the rotation of (44) and the power transmission shaft (32
a) A pair of gears (32) (32) movably arranged on
Drive shaft (44) by detaching from either side of
(50) provided with a clutch member (51) for disconnecting the connection between the screw rod (10) and the screw rod (10), and a clutch member (51).
Lever (50a) for disengaging from the gear (32) and the first limit switch (42) and second limit provided on the mounting base (20) side to detect the moving start end and end of the screw rod (10). A switch (43) and an electric circuit for controlling the operation of the drive motor (40) by a signal from the main switch and the first limit switch (42) or the second limit switch (43) provided on the support arm (221) and the like. Drive device (100A) characterized by being configured by

The means according to the second claim uses the seat (210) as the "base" and the back seat (2) as the "actuated member".
20) will be described with reference to the drawings corresponding to the embodiment. “The support arm (221) of the back seat (220) is rotatably connected to the seat (210) side, and In a drive device in which a screw rod (10) is arranged between the lower end of (221) and the seat side and the screw rod (10) is moved back and forth, the back seat (220) is tilted. , A mounting base (20) swingably supported on the seat (210) side, and a rotation nut (31) rotatably provided on the mounting base (20) to form a ball screw together with a screw rod (10). And a drive motor (40) whose drive shaft (44) is arranged at a right angle to the screw rod (10) to drive the rotating nut (31), and the screw rod (10) to be rotated by the drive motor (40). It is arranged so that it can rotate freely A worm gear (34) having a protrusion (35) protruding toward the rolling nut (31) and a first limit switch (on the side of the mounting base (20) for detecting the moving start end and end of the screw rod (10) ( 42) and the second limit switch (43) and the operation of the drive motor (40) to support the arm (22
1) The electric switch controlled by the signal from the main switch and the first limit switch (42) or the second limit switch (43) and the rotary nut (31) arranged on the rotary nut (31). And a clutch (50) for connecting and disconnecting the drive shaft (44) of the drive motor (40), and the clutch (50) rotates integrally with the rotating nut (31) and moves laterally. And a worm gear (3) that is integrally formed with the clutch member (51) that is disposed so as to be biased toward the worm gear (34) side.
The drive device (100B) characterized in that the drive device (100B) comprises a projection (35) formed in 4) and an operation projection (52) that engages with the projection (36) of the rotary nut (31). .

Further, as in the case of the first and second claims, the means according to the third claim uses the seat (210) as the "base" and the back seat (2 as the "actuated member").
20) will be explained. “The support arm (221) of the back seat (220) is rotatably connected to the seat (210) side and driven between the lower end of the support arm (221) and the seat side. In a drive device in which a rod (60) is arranged and the drive rod (60) is rotated to tilt the back seat (220), the drive device is swung to the seat (210) side. A mounting base (20) that is movably supported, a rotation nut (31) that is rotatably provided on the mounting base (20) and that supports the drive rod (60) in a non-rotatable manner, and the drive rod ( A pinion (61) that is provided at the tip of the 60) and operates the rack (62) that is integral with the back seat (220), and its drive shaft (44) is arranged at a right angle to the drive rod (60), and the rotation nut The drive motor (40) that rotationally drives (31) and this drive motor (40 A worm gear (34) having a protrusion (35) rotatably arranged on the drive rod (60) and protruding toward the rotation nut (31), and provided on the back seat (220) side so as to be rotated by the A first limit switch (42) and a second limit switch (43) for detecting the start and end of the movement,
An electric circuit for controlling the operation of the drive motor (40) by a signal from the main switch and the first limit switch (42) or the second limit switch (43) provided on the back seat (220) and the rotating nut (31) The rotary nut (31) is arranged above and includes a clutch (50) for connecting and disconnecting the drive shaft (44) of the drive motor (40), and the clutch (50) is connected to the rotary nut (31). A clutch member (51) movably arranged above and biased to the worm gear (34) side; a projection (35) integrally formed on the clutch member (51) and formed on the worm gear (34); The drive device (100C), which is configured to include an operating protrusion (52) that engages with the protrusion (36) of the rotating nut (31).

(Operation of the Invention) Next, the operation of each drive device (100A), (100B) and (100C) according to the present invention will be described.

-Regarding the drive device (100A) according to the first claim First, in the drive device (100A) according to the first claim, as shown in Figs. 4 to 11, a screw rod (10) to be driven back and forth. ) And a drive motor (40) for driving the same, a speed reducer (30), and the like are attached to one mounting base (20), the entire structure is extremely compact. Therefore, when the drive device (100A) is assembled to the seat (210) side of the reclining seat (200), the mounting space is not so much required, and the drive device (100A) is It can be applied to most reclining seats (200).

Further, this drive device (100A) is such that the mounting base (20) is swingably attached to the seat (210) side through the support hole (21), and the drive motor (40) is normally rotated. Alternatively, the screw rod (10) can be moved back and forth with respect to the seat (210) by reversing it. Therefore, the lower end of the support arm (221) of the back seat (220) is pushed and pulled by the screw rod (10), This changes the angle of the back sheet (220). In this case, the driving of the drive motor (40) can be arbitrarily stopped, so that the amount of advance / retreat of the screw rod (10) and hence the inclination angle of the back seat (220) are adjusted steplessly. Of course, this drive device (100A) has a first limit switch (4) for detecting the start and end of the movement of the screw rod (10).
2) and the second limit switch (43), the angle of the back seat (220) can be adjusted only within the range specified by the first limit switch (42) and the second limit switch (43). It is something to do.

Further, in this drive device (100A), a so-called ball screw is constituted by the screw rod (10) and the rotation nut (31) of the speed reducer (30). A clutch (50) is arranged between the drive shaft (44) of the drive motor (40) and the rotary nut (31), and the clutch (50) engages and disengages both. That is, a clutch member (51) for disconnecting the drive shaft (44) and the gear (32) adjacent to the drive shaft (44) is arranged, and the clutch member (51) is illustrated in the left side by the lever (50a). The movement in the direction disconnects both the drive shaft (44) and the gear (32) adjacent thereto.

Therefore, the screw rod (10) is moved back and forth by rotating the rotary nut (31), and in an emergency, etc.
Drive shaft (44) and rotating nut (3) by clutch (50)
By disconnecting the connection between 1) and applying a large force to the back seat (220) side, the screw rod (10) can be moved back and forth regardless of whether the drive device (100A) is in the drive state or the stop state. Is possible. More specifically, for example, in an emergency, even if the back seat (220) is in a state where it interferes with the movement of a person, the clutch (50) causes the drive shaft (44) to move.
The drive device (10
The back sheet (220) may be tilted in a required direction without the need to manually operate (0A) itself. It should be noted that an operating lever for operating the clutch (50) is provided in a place where the user's eyes do not normally reach, for example, under the armrest, and is operated by a crew member. Do not operate 50) carelessly.

Furthermore, in this drive device (100A), the drive shaft (44) of the drive motor (40) is arranged in parallel with the screw rod (10) constituting the ball screw, so that the overall size can be reduced. It is improving more.

-Regarding the drive device (100B) according to the second claim First, the drive device (100B) according to the second claim has substantially the same operation as the drive device (100A) according to the first claim. In addition to having, as shown in FIGS. 12 to 15,
Since the drive shaft (44) of the drive motor (40) is arranged at a right angle to the screw rod (10) constituting the ball screw,
The arrangement can be different from that of the driving device (100A) according to the first claim.

The right side portion of the screw rod (10) in the drawing is rotatable with respect to the screw rod (10) and has a protrusion (3
A worm gear (34) whose 5) engages with the operation protrusion (52) of the clutch member (51) is fitted. That is, in the clutch (50), the clutch member (51) is moved in the left arrow direction in FIG. 14 by the operation lever (56), so that the operation projection (52) and the worm gear (52) on the clutch member (51) side. The engagement with the projection (35) on the 34) side is released.

-Regarding the drive device (100C) according to the third claim, in this drive device (100C), the drive rod (60) rotatably provided on the mounting base (20) is attached to the rotation nut (31). The drive rod (60) is rotated so that the rack (62) is operated by the pinion (61) provided at the tip of the drive rod (60). The rod (60) is attached to the mounting base (2
There is no change with respect to 0). Therefore, in the case of this drive device (100C),
Since its shape does not change at all during operation, it is possible to select the installation site without considering the operating state of the drive device (100C).

Of course, also in this drive device (100C), the normal drive rod (60) and the drive motor (40) are connected by the reduction gear device (30), but the drive device (10) according to the second claim.
0B) clutch (50) configured similar to clutch (50)
When the connection between the two is cut off by, the drive rod (60) is in a state of freely rotating. Therefore, the back sheet (22
If you apply a large force to the (0) side, this back sheet (2
The drive rod (60) freely rotates through the rack (62) on the 20) side, and the back seat (220) is changed to a desired position.

The above operations have been described with respect to the case of being applied to the back seat (220) of the reclining seat (200). This operation is performed by the drive devices (100A), (100B) and (100C) as shown in FIG. The same applies when applied to the footrest device (230) of the reclining seat (200) as shown in FIG.

(Embodiment) Next, each of the driving devices (100A), (100B) and (100C) according to the present invention will be described with reference to the drawings.

-About the drive device (100A) according to the first claim Fig. 1 shows a side view of a reclining seat (200) adopting the drive device (100A) according to the first claim, and Fig. 2 As shown in (1), the reclining seat (200) has a back seat (220) tiltable with respect to the seat (210) and a seat (21
It is equipped with a footrest device (230) in which the upper plate moves upward when it goes forward.

As shown in FIG. 3, the drive device (100A) according to the first claim is arranged between the seat (210) and the back seat (200) constituting the reclining seat (200). That is, the drive device (100A) utilizes a pair of support holes (21) (each of which is positioned substantially horizontally) provided in a mounting base (20) constituting the seat (210). ) Side and is swingable around each support hole (21). The back seat (220) includes a support arm (221), and the support arm (221) is rotatably connected to the seat (210) side by a rotation shaft (222). One end of a screw rod (10) constituting a drive device (100A) is rotatably connected to the lower end of the arm (221).

As shown in FIGS. 4 to 11, the drive device (100A) mainly includes the above-mentioned screw rod (10) and a ball screw in the state shown in FIG. 8 together with the screw rod (10). And a drive motor (40) for rotating the rotation nut (31).
And a mounting base (20) that supports the rotation nut (31) and the drive motor (40), and is disposed between the drive shaft (44) of the drive motor (40) and the rotation nut (31). It is equipped with a clutch (50) for continuation.

Since the screw rod (10) constitutes a ball screw together with a rotating nut (31) described later, a spiral groove on which the ball can roll is formed on the outer peripheral surface thereof. In addition,
The position of a first stopper (11) and a second stopper (12) for actuating a first limit switch (42) and a second limit switch (43), which will be described later, can be adjusted on the screw rod (10). It is installed.

The rotation nut (31) that drives this screw rod (10)
It is one component of the speed reducer (30) assembled to the mounting base (20), and is connected to the drive motor (40) via one gear (32) on the power transmission shaft (32a). It is configured to work with the drive shaft (44). That is, as shown in FIGS. 4 and 6, the rotary nut (31) is directly meshed with the gear (32) on the right side in the figure, and the gear (32) on the right side in the figure transmits power. It is fixed to the right end of the shaft (32a). On the other hand, a gear (32) is rotatably provided on the left end portion of the power transmission shaft (32a) in the figure, and the gear (32) on the left side is a drive motor (40) as shown in FIG. It directly meshes with the drive shaft (44). A clutch member (51) forming a clutch (50) described later is provided on the power transmission shaft (32a) located between the gears (32). 51) is designed to rotate integrally with the power transmission shaft (32a) but can move left and right on the power transmission shaft (32a), and is engaged with the left gear (32) by the spring (51a). There is something to do.

The drive motor (40) is driven by a direct current, and is rotated in the forward or reverse direction according to the user's selection by a main switch provided on the armrest of the seat (210) or the like. The drive motor (40) is also provided with an electromagnetic brake (41) that blocks the rotational force from the screw rod (10).

The drive motor (40) is also configured to stop its rotational drive by a signal from the first limit switch (42) or the second limit switch (43) provided on the mounting base (20) side. There is. That is, as shown in FIGS. 4 and 7, the first stopper (1
The first limit switch (42) and the second limit switch (43) are provided on the mounting base (20) facing the 1) and second stopper (12), respectively. (42) or the second limit switch (43) is connected to the first stopper (11) or the second stopper (1
When it is pressed by 2), a signal is emitted to stop the drive motor (40) by, for example, cutting off the power supply to the drive motor (40). FIG. 11 shows these electric circuits.

Further, a clutch (5) arranged between the drive shaft (44) of the drive motor (40) and the screw rod (10) to connect and disconnect them.
0) has the structure as shown in FIGS. 5 and 6 in the case of the present embodiment. That is, a power transmission shaft (32a) parallel to the drive shaft (44) and the screw rod (10) parallel to the drive shaft (44) is disposed, and the drive shaft (44) and the drive shaft (44) are disposed on the power transmission shaft (32a). A clutch member (51) for disconnecting both of the screw rods (10) is arranged. By moving the clutch member (51) to the left in the figure by the lever (50a), the drive shaft (44) and the drive shaft (44) The gear (32) adjacent to the gear (32) is disconnected. That is,
As shown in FIG. 4 to FIG. 6, the power transmission shaft (32a) arranged between the screw rod (10) and the drive shaft (44) in parallel with them has the rotary nut (3
The gear (32) meshing with 1) is rotatably interposed, and the clutch member (51) of the clutch (50) is placed between the two gears (32) to the left and right on the power transmission shaft (32a). It is movably arranged. This clutch member (51)
As described above, it is movable left and right with respect to the power transmission shaft (32a) but rotates integrally with the power transmission shaft (32a). By combining them, the driving force of the drive motor (40) is transmitted to the rotating nut (31) while decelerating.

The clutch member (51) has a spring (51a) interposed between the clutch member (51) and the fixed side (right side) gear (32).
Is always in pressure contact with the left gear (32) rotatably mounted on the power transmission shaft (32a). When the lever (50a) separates the left gear (32) from the elastic force of the spring (51a), the clutch member (51) causes the drive shaft (4) to move.
This is to interrupt the transmission of the rotary domain power from 4) to the rotary nut (31) side.

The specific configuration of the clutch (50) may be the same as that of the drive devices (100B) and (100C) according to the second and third claims shown below, and may be implemented by the drive shaft (44). Any configuration may be used as long as it is configured to disconnect the screw rods (10).

-Driving device (100B) according to the second claim This driving device (100B) is as shown in Figs. 12 to 15, and most of the configuration is the driving device according to the first claim. It is practically the same as (100A), but differs in the following points. The same members as those of the driving device (100A) in the driving device (100B) are designated by the same reference numerals in the drawings, and the description thereof will be omitted.

That is, in this drive device (100B), on the screw rod (10) whose one end is connected to the support arm (221),
As shown in FIG. 12, the rotation nut (31) that constitutes a ball screw together with the screw rod (10) and the rotation nut (31) can move in the lateral direction but rotate integrally. Clutch member (5
1) and a worm gear (34) which is arranged on the right side of the rotary nut (31) in the figure and has a projection (35) at one end meshing with the clutch member (51) side are coaxially fitted. The drive shaft (44) of the drive motor (40) and the screw rod (10) are
It is arranged in a straight line through the worm mechanism (33). Therefore, in the drive motor (40) used in this row, the rotational force from the screw rod (10) is blocked by the worm mechanism (33), so that the drive motor (40) operates the electromagnetic brake (41). I do not have it. As described above, the drive shaft (44) and the screw rod (10) are arranged orthogonal to each other because the seat (21
This is because it is applied when the space for accommodating the drive device (100B) on the 0) side should have such a shape.

Further, in this drive device (100B), the clutch (50) is particularly configured as follows. This clutch (50), as shown in FIG. 12 and FIG.
A clutch member (51) having an operation protrusion (52) and rotating integrally with the rotation nut (31), and an operation roller for moving the clutch member (51) in the direction of the left arrow in FIG. (54) and a spring (55) for constantly urging the clutch member (51) in the direction of the right arrow in the figure. The right side of the screw rod (10) in the figure is rotatable with respect to the screw rod (10) and has a protrusion (3
The worm gear (34) whose 5) engages with the operation projection (52) of the clutch member (51) is fitted. That is, in the clutch (50), the clutch member (51) is moved in the left arrow direction in FIG. 14 by the operation lever (56), so that the operation protrusion (52) and the worm gear (52) on the clutch member (51) side. The engagement with the projection (35) on the 34) side is released.

Further, as shown in FIG. 14, a plurality of protrusions (36) are formed on the rotary nut (31) so as to project, and each of these protrusions (36) is an operation protrusion (on the clutch member (51) side). 52) Fitted so that it is located between them. Therefore, the clutch member (51) and the rotary nut (31) rotate integrally with each other by engaging the operation protrusions (52) on the clutch member (51) side with the respective protrusions (36). Also,
When the clutch member (51) is urged by the spring (55) toward the rightward arrow in FIG. 14, the operating projection (52) on the clutch member (51) side is moved to the worm gear (34).
The worm gear (34) and the clutch member (51), that is, the rotating nut (31) are integrally rotated by meshing between the side protrusions (35). On the other hand, the clutch member (51)
When is retracted, the projections (36) are disengaged from the operation projections (52) on the clutch member (51) side, so that the rotation nut (31) can rotate independently of the worm gear (34). It becomes a state.

As a result, when the operation protrusion (52) on the clutch member (51) side and the protrusion (35) on the worm gear (34) side are engaged (normal state), the drive motor (40) The driving force is transmitted from the driving shaft (44) to the worm gear (34) of the worm mechanism (33), and the projection (35) of the worm gear (34) and the operation projection (52) of the clutch member (51) are engaged. The rotary nut (31) is driven to rotate by the rotary nut (31), and the screw rod (10) moves back and forth according to the rotation direction of the drive motor (40). Further, by moving the clutch member (51) of the clutch (50) by the operation lever (56) in the direction of the left arrow in FIG. 14, the operation projection (52) on the clutch member (51) side and the worm gear (34). When the engagement with the side projection (35) is released, the screw rod (10) becomes independent from the drive motor (40), so if you apply force to the screw rod (10), the screw rod (10) will move freely. To retreat to.

A cable is connected to the operation lever (56),
An operating lever (not shown) is connected to this cable. Since this operation lever is not normally operated, it is provided in a place where it is difficult for a person sitting on the seat (210) to reach.

Drive device (100C) according to claim 3 This drive device (100C) is as shown in FIG. 16 to FIG. 18, and in this drive device (100C), the drive device (100B) described above is used. ), The drive shaft (44) of the drive motor (40) and the drive rod (60) are arranged so as to be orthogonal to each other via the worm mechanism (33). The clutch (50) also has the same structure as the drive unit (100B) described above, and members common to the drive unit (100B) are designated by the same reference numerals in the drawings and their description is omitted.

This drive device (100C) differs from the drive device (100B) in that the drive arm (221) of the back seat (220) drives the drive rod (6) instead of the screw rod (10).
0) is used. This drive rod (60)
Is the mounting base (20) in the embodiment shown in FIG.
The two rods projecting to the left and right are used, and the pinion (61) is connected to the tip of each of these drive rods (60) as shown in FIG. 17 or 18. The inner end of each drive rod (60) is non-rotatably connected to the rotary nut (31) using a key or the like. A clutch (62) provided on the support arm (221) side of the back seat (220) meshes with the pinion (61), whereby
When the drive rod (60) rotates, the support arm (221) of the back seat (220) is driven via the rack (62).

In the case of the rack (62) shown in FIG. 17, this is formed in a linear shape, which is an example suitable for reciprocating the rack (62), and also shown in FIG. The rack (62) is formed in an arc shape.
This is an example suitable for moving 2) in an arc.

(Effect of the invention) As described above, in the invention according to the first claim,
As illustrated in the above embodiment, the support arm (221) of the back seat (220), which is the operated member, is movably connected to the seat (210) side, which is the base, and is the operated member. A screw rod (10) is arranged between the support arm (221) and the base side and the screw rod (10) is moved back and forth to operate the support arm (221) which is the operated member. In a drive unit, a mounting base (20) swingably supporting the drive unit on the seat (210) side and a ball screw together with a screw rod (10) rotatably provided on the mounting base (20). The rotary nut (31) and the gear (32) fixed to directly mesh with the rotary nut (31) are arranged at one end in parallel with the screw rod (10) and rotatably at the other end. A power transmission shaft (32a) having an intervening gear (32) , The drive shaft (44) meshes with the gear (32) interposed at the other end of the power transmission shaft (32a) and is arranged parallel to the screw rod (10), and the drive shaft (44) is provided by the electromagnetic brake (41). The drive motor (40) whose rotation is stopped, and the power transmission shaft (32
a) A pair of gears (32) (32) movably arranged on
Drive shaft (44) by detaching from either side of
(50) provided with a clutch member (51) for disconnecting the connection between the screw rod (10) and the screw rod (10), and a clutch member (51).
Lever (50a) for disengaging from the gear (32) and the first limit switch (42) and second limit provided on the mounting base (20) side to detect the moving start end and end of the screw rod (10). A switch (43) and an electric circuit for controlling the operation of the drive motor (40) by a signal from the main switch and the first limit switch (42) or the second limit switch (43) provided on the support arm (221) and the like. It is possible to provide a drive device (100A) having all of the following effects by a simple structure. That is, the screw rod (10) that directly swings the support arm (221) of the back seat (220) is moved forward and backward by the drive motor (40) that rotates in the normal direction or the reverse direction. Can be set freely within a certain range, and therefore the inclination angle of the back seat (220) in the reclining seat (200) can be automatically adjusted at any position. In other words, this drive (100
In A), the manual operation for tilting the back seat (220) is completely unnecessary, and the angle adjustment of the back seat (220) can be fully automated.

This drive device (100A) is extremely compact because all the necessary components are put together on this mounting base (20) centering on the mounting base (20). It can be stored and installed in a narrow space on the seat (210) side.

This drive device (100A) is a reclining seat to which the main components such as the screw rod (10) and the drive motor (40) are all attached to the mounting base (20). (200) sheet (2
It can be applied to most reclining seats (200) by mounting it on the 10) side.

The screw rod (10) that drives the support arm (221) of the back seat (220) constitutes a so-called ball screw together with the rotation nut (31) of the speed reducer (30), and moreover, the clutch member (is operated by operating the lever (50a). Since the clutch (50) for disengaging the gear (32) from the gear (51) is provided, when the drive motor (40) is stopped, the clutch (50) is operated to operate the drive shaft (44) and the drive shaft (44). By disconnecting the adjacent gears (32) from each other, the screw rod (10) can be moved back and forth with respect to the mounting base (20) by applying a certain force to the back seat (220). When doing, the back sheet (220) can be undulated by applying force.

The drive device (100B) according to the second claim and the drive device (100C) according to the third claim have the same effect as the drive device (100A) according to the first claim. Outside, drive shaft (4) of screw rod (10) and drive motor (40)
Since it is orthogonal to 4), it can be arranged differently from the drive device (100A) according to the first claim.

Further, the drive devices (100A), (100B) and (100C) according to the present invention are not limited to the case of the reclining seat (200) described above, and automatic doors and the like that must not be a hindrance to escape during an emergency. Can be easily applied to, and is extremely useful industrially.

[Brief description of drawings]

FIG. 1 is a side view of a reclining seat that employs the drive device according to the present invention, and FIG. 2 is a perspective view showing a state in which the back seat of the reclining seat shown in FIG. FIG. 3 is a partially enlarged sectional view of the seat centering on the drive device applied to this reclining seat. 4 to 11 show a drive device according to the first claim, FIG. 4 is a front view of the drive device, FIG. 5 is a plan view of the same, and FIG. 6 is a rear view of the same. FIG. 7 is a bottom view of the same, FIG. 8 is a partial sectional view showing a state where a ball screw is constituted by a screw rod and a rotating nut, FIG. 9 is a left side view of the drive device, and FIG. 10 is a right side view thereof. FIG. 11 is a circuit diagram of an electric circuit applied to this driving device. 12 to 15 show a drive device according to the second claim, FIG. 12 is a sectional view thereof, FIG. 13 is a bottom view of the same, and FIG.
FIG. 15 is an exploded perspective view showing a clutch, and FIG. 15 is a side view of the same. Furthermore, FIGS. 16 to 18 show a drive device according to the third claim, FIG. 16 is a cross-sectional view thereof, and FIG. 17 is a schematic plan view showing an example of a rack used for this drive device. Figure, 18th
The figure is a schematic side view thereof. Explanation of reference numerals 100A / 100B / 100C ... Drive device, 10 ... Screw rod 20 ... Mounting base, 21 ... Support hole, 30 ... Reduction device, 31 ... Rotating nut, 32
a ... power transmission shaft, 33 ... worm mechanism, 34 ... worm gear, 35 ... protrusion, 40 ... drive motor, 41 ... electromagnetic brake, 42
… First limit switch, 43… Second limit switch,
50 ... Clutch, 50a ... Lever, 51 ... Clutch member, 52 ...
Operating protrusion, 53 ... Operating groove, 54 ... Operating roller, 55 ... Spring, 60 ... Drive rod, 61 ... Pinion 62 ... Rack, 200 ...
Reclining seat, 210 ... Seat, 220 ... Back seat, 221 ... Support arm.

Claims (3)

[Claims] 1. A support arm (221) of a back seat (220), which is an actuated member, is movably connected to a seat (210) side of a base, and the support arm (221) is an actuated member. A drive device in which a screw rod (10) is arranged between the base and the base and the screw rod (10) is moved back and forth to operate the support arm (221) which is the operated member. A mounting base (20) that swingably supports the drive unit on the seat (210) side, and a rotation nut that is rotatably provided on the mounting base (20) and constitutes a ball screw together with the screw rod (10). (31) and a gear (32) having one end fixed with a gear (32) fixed to directly mesh with the rotation nut (31) and arranged parallel to the screw rod (10) and rotatably interposed at the other end ( 32) and a power transmission shaft (32a) The drive shaft (44) meshes with the gear (32) interposed at the other end of 2a) and is arranged parallel to the screw rod (10), and the rotation of the drive shaft (44) is stopped by the electromagnetic brake (41). Drive motor (40) and power transmission shaft (32
a) A pair of gears (32) (32) movably arranged on
Drive shaft (44) by detaching from either side of
(50) provided with a clutch member (51) for disconnecting the connection between the screw rod (10) and the screw rod (10), and a clutch member (51).
Lever (50a) for disengaging from the gear (32) and the first limit switch (42) and second limit provided on the mounting base (20) side to detect the moving start end and end of the screw rod (10). A switch (43) and an electric circuit for controlling the operation of the drive motor (40) by a signal from the main switch and the first limit switch (42) or the second limit switch (43) provided on the support arm (221) and the like. A drive device (100A) characterized by being configured by. 2. A supporting arm (221) of a back seat (220) which is an actuated member is movably connected to a seat (210) side which is a base, and the supporting arm (221) which is the actuated member. A drive device in which a screw rod (10) is arranged between the base and the base and the screw rod (10) is moved back and forth to operate the support arm (221) which is the operated member. A mounting base (20) that swingably supports the drive unit on the seat (210) side, and a rotation nut that is rotatably provided on the mounting base (20) and constitutes a ball screw together with the screw rod (10). (31), a drive motor (40) whose drive shaft (44) is arranged at a right angle to the screw rod (10) to drive the rotating nut (31), and a screw rod which is rotated by the drive motor (40). (10) is rotatably arranged on the A worm gear (34) having a protrusion (35) protruding toward the rolling nut (31) and a first limit switch (on the side of the mounting base (20) for detecting the moving start end and end of the screw rod (10) ( 42) and the second limit switch (43) and the operation of the drive motor (40) to support the arm (22
1) The electric switch controlled by the signal from the main switch and the first limit switch (42) or the second limit switch (43) and the rotary nut (31) arranged on the rotary nut (31). And a clutch (50) for connecting and disconnecting the drive shaft (44) of the drive motor (40), and the clutch (50) rotates integrally with the rotating nut (31) and moves laterally. And a worm gear (3) that is integrally formed with the clutch member (51) that is disposed so as to be biased toward the worm gear (34) side.
A drive device (100B) comprising a projection (35) formed in 4) and an operation projection (52) that engages with the projection (36) of the rotary nut (31). 3. A supporting arm (221) of a back seat (220) which is an actuated member is movably connected to a seat (210) side which is a base, and the supporting arm (221) which is the actuated member. A drive device in which a drive rod (60) is arranged between the base and the base and the drive rod (60) is rotated to tilt the back seat (220) which is the operated member. , A mounting base (20) that swingably supports the drive device on the seat (210) side, and a rotatably provided on the mounting base (20) so that the drive rod (60) cannot rotate. A rotation nut (31) for supporting the drive rod (60), a pinion (61) provided at the tip of the drive rod (60) for operating a rack (62) integrated with the back seat (220), and a drive shaft (44) thereof. Is placed at a right angle to the drive rod (60) and drives the rotation nut (31) to rotate. A worm gear (34) having a motor (40) and a protrusion (35) rotatably arranged on the drive rod (60) so as to be rotated by the drive motor (40) and protruding toward the rotation nut (31). A first limit switch (42) and a second limit switch (43) which are provided on the back seat (220) side and detect the movement start end and end thereof.
An electric circuit for controlling the operation of the drive motor (40) by a signal from the main switch and the first limit switch (42) or the second limit switch (43) provided on the back seat (220) and the rotating nut (31) The rotary nut (31) is arranged above and includes a clutch (50) for connecting and disconnecting the drive shaft (44) of the drive motor (40), and the clutch (50) is connected to the rotary nut (31). A clutch member (51) movably arranged above and biased to the worm gear (34) side; a projection (35) integrally formed on the clutch member (51) and formed on the worm gear (34); A drive device (100C), characterized in that the drive device (100C) is provided with an operation protrusion (52) that engages with the protrusion (36) of the rotating nut (31).