JP2022154042A - tilt device - Google Patents

Abstract

To provide a tilt device capable of suppressing reduction of rigidity of a frame.SOLUTION: A tilt device 100 is configured so that: a link frame 20 in which, a pan frame 2 is fixed to one end part 20a and the other end part 20B is rotatably fitted to a coupling frame 10 coupling a pair of left and right side frames 1, 1, is provided between the pair of left and right side frames 1, 1, the side frame 1 is not subjected to processing for fitting the link frame 20, therefore, for example, rigidity reduction which occurs in prior ones and which is caused by a complicated shape for rotatably fitting the tilt member to the lower frame, is not caused. Therefore, the tilt device 100 has a structure which suppresses reduction of rigidity of the side frames 1, therefore rigidity of the frame forming the seat, is not reduced and the device can be preferably utilized.SELECTED DRAWING: Figure 1

Description

TECHNICAL FIELD The present invention relates to a tilt device for raising and lowering the seating surface of a seat.

2. Description of the Related Art Conventionally, a seat for a vehicle such as an automobile is known to have a tilt mechanism for raising and lowering a seat surface (see, for example, Patent Document 1).
The tilt mechanism includes a cushion frame having a pair of left and right lower frames and a pan frame that spans the front end sides of the pair of left and right lower frames, and includes a tilt member rotatably attached to the lower frames. The tilt member rotates up and down to raise and lower the pan frame.

JP 2013-129280 A

However, in the case of the tilt mechanism of Patent Document 1, the structure in which the tilt member is rotatably attached to the lower frame complicates the shape of the lower frame. It was difficult to obtain the same rigidity as that of the frame, and the rigidity of the frame was sometimes lowered.

SUMMARY OF THE INVENTION An object of the present invention is to provide a tilting device in which the rigidity of the frame is less likely to be lowered.

In order to solve the above problems, the invention according to claim 1,
A tilt device for raising and lowering a pan frame spanned between a pair of left and right side frames constituting a seat,
a link frame, to which the pan frame is fixed at one end and whose other end is rotatably attached to a connecting frame connecting the pair of left and right side frames;
a driving unit that rotates the link frame to switch the arrangement of the pan frame between a lowered position close to the pair of left and right side frames and a raised position spaced apart from the pair of left and right side frames;
characterized by comprising

The invention according to claim 2 is the tilt device according to claim 1,
The link frames are arranged in pairs on the left and right, and connecting members are provided for connecting the pair of left and right link frames,
The drive unit includes a motor, a drive shaft rotated by the motor, and a drive shaft bracket disposed so as to be able to advance and retreat along the drive shaft,
The motor is mounted on a tilt bracket disposed between the pair of left and right side frames so as to be rotatable about the extending direction of the connecting frame. The drive shaft bracket is attached to the connecting member facing the opposite side,
One end side of the link frame is raised as the drive shaft bracket is moved to the distal end side of the drive shaft, and the link frame is moved as the drive shaft bracket is moved to the proximal end side of the drive shaft. is configured such that one end side of the is lowered.

The invention according to claim 3 is the tilt device according to claim 2,
The tilt bracket includes a tilt frame that is substantially parallel to the connection frame and arranged below the connection frame,
The motor is mounted on the tilt frame via a motor bracket that rotatably supports the motor.

The invention according to claim 4 is the tilt device according to claim 3,
The tilt bracket has a pair of bracket bodies arranged on both end sides of the tilt frame and supporting the tilt frame,
The bracket body is fixed to a seat frame forming the seat.

The invention according to claim 5 is the tilt device according to any one of claims 2 to 4,
an intermediate portion between one end and the other end of the link frame is formed in a shape curved downward where the motor is disposed;
Both ends of the connecting member are connected to the middle portion of the link frame.

The invention according to claim 6 is the tilt device according to any one of claims 2 to 5,
The connecting member is a pipe-shaped member,
The drive shaft bracket is attached so as to circumferentially cover at least a portion of the peripheral surface of the connecting member.

According to the first aspect of the invention, in the tilt device, the pan frame is fixed to one end, and the other end is rotatably attached to the connecting frame connecting the pair of left and right side frames. The link frame is disposed between a pair of left and right side frames, and the side frames are not processed for attaching the link frame. not occurred.
In other words, since this tilt device has a structure that makes it difficult to lower the rigidity of the side frames, the arrangement of the pan frame can be switched between the lowered position and the raised position without lowering the rigidity of the frame that constitutes the seat. can be suitably used for

According to the second aspect of the present invention, the tilt device includes a connecting frame connecting the pair of left and right side frames to which the other ends of the pair of left and right link frames are rotatably attached. A motor of the drive section is rotatably attached to a tilt bracket arranged between the frames, and a drive shaft of the drive section is arranged on a connecting member that connects a pair of left and right link frames. Since it has a structure in which the bracket is attached and the driving part is supported by the tilt bracket and the connecting frame, the rigidity for supporting the driving part that operates the tilting device is increased. there is

According to the third aspect of the present invention, the tilt device has the other end portion of the pair of left and right link frames rotatably attached to the connection frame that connects the pair of left and right side frames. A motor of the driving section is rotatably attached to the tilt frame arranged substantially parallel to and below the connecting frame, and the driving shaft of the driving section is connected to the connecting member that connects the pair of left and right link frames. It has a structure in which a drive bracket is attached, and the drive part is supported by the tilt frame and the connecting frame. rigidity is enhanced.

According to the fourth aspect of the present invention, the tilt device includes bracket bodies that are arranged in pairs on both end sides of the tilt frame and support the tilt frame, and the bracket bodies support the seat. Since it is fixed to the constituting seat frame, the rigidity for supporting the driving part for operating the tilting device is further enhanced.

According to the fifth aspect of the present invention, the intermediate portion between the one end and the other end of the link frame in the tilt device is formed in a shape curved downward where the motor is disposed, so that the link frame Since both end portions of the connecting member that connects the link frames are connected to the intermediate portions of the link frames, the amount of rotation of the link frames by the drive section is increased. The link frame can be preferably rotated.
In addition, the intermediate portion of the link frame is formed in a shape that curves downward, and the link frame presents a hat shape when viewed from the side. It is

According to the sixth aspect of the present invention, the connecting member that connects the link frames in the tilt device is a pipe-shaped member, and the drive shaft bracket of the drive unit is mounted on at least one side of the peripheral surface of the pipe-shaped connecting member. Since it is attached so as to cover the portion in the circumferential direction, the rigidity of that portion is increased, and the driving force of the driving portion is preferably applied to the connecting member (link frame), and the driving portion is driven through the connecting member. It becomes possible to preferably receive the load applied to (the drive shaft bracket).

It is a perspective view which shows the tilt apparatus of this embodiment. FIG. 4 is a side view showing the tilt device of the present embodiment, showing a state where the pan frame is in the lowered position; Fig. 10 is a side view showing the tilt device of the present embodiment, showing a state where the pan frame is in the first raised position; FIG. 4 is a side view showing the tilt device of the present embodiment, showing a state where the pan frame is in the second raised position; FIG. 4 is a perspective view showing a seat frame with a tilt device, showing a state where the pan frame is in the lowered position; Fig. 2 is a perspective view of a seat frame with a tilt device, showing a state where the pan frame is in a first raised position; FIG. 11 is a perspective view of the seat frame with the tilt device, showing the pan frame in a second raised position;

An embodiment of a tilt device according to the present invention will be described in detail below with reference to the drawings. However, although various technically preferable limitations are attached to the embodiments described below in order to carry out the present invention, the scope of the present invention is not limited to the following embodiments and illustrated examples.

The seat referred to below is, for example, a vehicle seat such as a vehicle seat, an aircraft seat, or a ship seat, but is not limited to a vehicle seat.
Further, in the following description, as shown in FIG. 5 and the like, the front-rear direction, the left-right direction, and the up-down direction are defined. Here, the backrest side of the seat is "rear", the opposite side is "front", the left hand side when sitting on the seat and looking forward is "left", and the state when sitting on the seat and looking forward is "left". The right hand side of is defined as "right", and the vertical direction corresponds to the vertical direction. That is, the width direction of the sheet corresponds to the left-right direction.

The tilting device 100 of the present embodiment is a device for raising and lowering a pan frame 2 that spans a pair of left and right side frames 1, 1 (see FIGS. 5 to 7) that constitute a seat.
As shown in FIGS. 1, 2 to 4, and 5 to 7, for example, the tilt device 100 has a pan frame 2 fixed to one end portion 20a, and the other end portion 20b extending to a pair of left and right sides. A link frame 20 is rotatably attached to a connecting frame 10 that connects the frames 1, 1, and the link frame 20 is rotated to change the arrangement of the pan frame 2 into a pair of left and right side frames 1, 1, and 1. 1 and a raised position away from the pair of left and right side frames 1, 1, and the like.

The seat frame F includes side frames 1, 1 and a pan frame 2, and is composed of a cushion frame that serves as a skeleton of the seat, a back frame that serves as a skeleton of the backrest, and the like.
That is, the side frame 1 and the pan frame 2 form a part of the seat frame F.
Although only the seat frame F of the seat is shown in FIGS. 5 to 7, the seat on which the user sits is constructed by attaching a cushion and a cover to the seat frame F. FIG.

A connecting frame 10 connecting the pair of left and right side frames 1, 1 is a pipe-shaped member extending in the width direction (horizontal direction) of the seat. A link frame 20 is rotatably arranged.

The link frames 20 are arranged in a pair on the left and right, and a connecting member 21 connecting the pair of left and right link frames 20, 20 is provided.
An intermediate portion 20c between one end portion 20a and the other end portion 20b of the link frame 20 is formed in a shape curved downward, and both ends of the connecting member 21 are coupled to the intermediate portion 20c of the link frame 20. .
An intermediate portion 20c of the link frame 20 is formed in a downwardly curved shape in which a motor 31 (driving portion 30), which will be described later, is disposed, and the link frame 20 has a substantially hat shape when viewed from the side.

The drive unit 30 includes a motor 31 , a drive shaft 32 rotated by the motor 31 , and a drive shaft bracket 33 arranged along the drive shaft 32 so as to be threadable forward and backward.

The motor 31 is rotatably arranged on a tilt bracket 40 arranged between a pair of left and right side frames 1, 1 with the extending direction (horizontal direction) of the connecting frame 10 as an axial direction.
A drive shaft bracket 33 is attached to the connecting member 21 with the tip of the drive shaft 32 directed to the opposite side of the tilt bracket 40 while the motor 31 is rotatably disposed on the tilt bracket 40 .
Here, the connecting member 21 connecting the pair of left and right link frames 20, 20 is a pipe-shaped member, and the drive shaft bracket 33 covers at least a part of the peripheral surface of the connecting member 21 in the circumferential direction. attached to the

Also, the motor 31 is a so-called screw motor, and the drive shaft 32 is a screw shaft.
A nut (not shown) corresponding to the drive shaft 32 is pivotally supported on the drive shaft bracket 33 by a support shaft 33a.
The drive shaft 32 of the motor 31 is screwed into a nut (not shown) supported by the drive shaft bracket 33, and the drive shaft 32 is screwed into the nut of the drive shaft bracket 33. It is rotatable with a direction intersecting the width direction of the seat as an axial direction.

In the drive unit 30, one end side of the link frame 20 is raised as the drive shaft bracket 33 is moved to the tip side of the drive shaft 32 by screwing the nut, and the drive shaft bracket 33 is driven by the screwing of the nut. The one end side of the link frame 20 is configured to be lowered as the shaft 32 is moved to the base end side.
The operation of rotating the link frame 20 up and down by moving the drive shaft bracket 33 along the drive shaft 32 so as to be screwed forward and backward by driving the motor 31 will be described later.

The tilt bracket 40 includes a tilt frame 41 substantially parallel to the connecting frame 10 and disposed below the connecting frame 10 , and a pair of tilt brackets 41 disposed on both end sides of the tilt frame 41 . It includes a supporting tilt bracket body 42 , a motor bracket 43 that rotatably supports the motor 31 , and a connection bracket 44 that connects the motor bracket 43 to the tilt frame 41 .
In other words, the motor 31 of the drive unit 30 is arranged on the tilt frame 41 via a motor bracket 43 that rotatably supports the motor 31 .
A tilt bracket body 42 of the tilt bracket 40 is fixed to a cushion frame of a seat frame F that constitutes the seat.

Next, the operation of the tilt device 100 of this embodiment will be described with reference to FIGS. 2 to 4 and 5 to 7. FIG.

When the tilt device 100 is not operated, as shown in FIGS. 2 and 5, the pan frame 2 is located at a lowered position close to the pair of left and right side frames 1,1.
At this time, as shown in FIG. 2, the amount of actuation of the driving portion 30 is 0 mm, and the drive shaft bracket 33 is located at the base of the drive shaft 32 near the motor 31 .

When the tilt device 100 is operated to adjust the height of the seat portion, a switch (not shown) is operated to drive the motor 31 so that the amount of movement of the driving portion 30 is set to, for example, 20 mm. When the drive shaft 32 is rotated in the forward direction, the drive shaft bracket 33 is moved toward the distal end of the drive shaft 32 by the screwing of the nut, as shown in FIGS. One end 20a side of the link frame 20 connected via 21 is raised by one step, and the pan frame 2 fixed to the link frame 20 is moved to the first raised position separated from the pair of left and right side frames 1, 1. placed in
For example, when the actuation amount of the drive portion 30 is "20 mm", the drive shaft bracket 33 is positioned on the central side of the drive shaft 32 as shown in FIG.

When a switch (not shown) is operated to drive the motor 31 so that the amount of actuation of the drive unit 30 is set to, for example, 40 mm, and the drive shaft 32 is rotated in the forward direction, as shown in FIGS. In addition, as the drive shaft bracket 33 moves further toward the distal end of the drive shaft 32 due to the screwing of the nut, the one end 20a side of the link frame 20 connected to the drive shaft bracket 33 via the connecting member 21 is further aligned. The pan frame 2 fixed to the link frame 20 is raised stepwise to a second raised position further separated from the pair of left and right side frames 1, 1. - 特許庁
For example, when the actuation amount of the drive portion 30 is "40 mm", the drive shaft bracket 33 is positioned on the shaft tip side of the drive shaft 32 as shown in FIG.

In this manner, the pan frame 2 can be arranged at the first raised position or the second raised position by the tilt device 100, and the seat portion of the seat can be adjusted in height.
It should be noted that although the height position of the pan frame 2 has been described here to be switched between two stages, the first raised position (operation amount "20 mm") and the second raised position (operation amount "40 mm"), The height position of the frame 2 is arbitrary within a range in which the drive shaft bracket 33 can move along the drive shaft 32. The height of the seat can be adjusted by switching between two heights.

When the seat portion of the seat is to be returned to its original height, a switch (not shown) is operated to drive the motor 31 so that the operation amount of the drive portion 30 is set to "0 mm", and the drive shaft 32 is reversed. 2 and 5, the drive shaft bracket 33 moves toward the base of the drive shaft 32 due to the screwing of the nut. One end 20a side of the linked link frame 20 is lowered, and the pan frame 2 fixed to the link frame 20 is returned to the lowered position close to the pair of left and right side frames 1,1.

As described above, the tilt device 100 of the present embodiment can raise and lower the pan frame 2 that spans the pair of left and right side frames 1, 1 to adjust the height of the seat.

This link device 100 is disposed between a pair of left and right side frames 1, 1, and a link frame 20 is rotatably attached to a connecting frame 10 connecting the pair of left and right side frames 1, 1. Since the side frames 1 are not processed for attaching the link frames 20, there is no decrease in rigidity as in the lower frame of Patent Document 1.
In other words, the tilt device 100 of the present embodiment has a structure that makes it difficult to reduce the rigidity of the side frame 1 and the seat frame F including the side frame 1. It can be used preferably.

In addition, the tilt device 100 has a connecting frame 10 connecting a pair of left and right side frames 1, 1 to which the other end portion 20b of a pair of left and right link frames 20 is rotatably attached. The motor 31 of the drive unit 30 is rotatably attached to the tilt frame 41 arranged substantially parallel to the connecting frame 10 below the connecting frame 10 . It has a structure in which a drive bracket 33 arranged on a drive shaft 32 of the drive part 30 is attached, and the drive part 30 is supported by the tilt frame 41 and the connection frame 10, Rigidity is improved for supporting the drive unit 30 that operates the tilt device 100 .

The tilt device 100 also includes bracket bodies 42 that are arranged in pairs on both end sides of the tilt frame 41 and support the tilt frame 41. The bracket bodies 42 constitute a seat. Since it is fixed to the frame F, the rigidity for supporting the drive section 30 that operates the tilt device 100 is further improved.

Further, in the tilting device 100, an intermediate portion 20c between the one end portion 20a and the other end portion 20b of the link frame 20 is formed in a shape curved downward where the motor 31 is arranged, so that the link frame 20 is Since both end portions of the connecting member 21 connecting the link frames 20 are connected to the intermediate portions 20c of the link frames 20, the link frames 20 are driven by the driving portion 30. By increasing the amount of rotation, the link frame 20 can be preferably rotated.
Further, the link frame 20 has an intermediate portion 20c that is curved downward so that the link frame 20 has a substantially hat shape when viewed from the side. The rigidity is improved.

In the tilting device 100, the connecting member 21 connecting the link frames 20 is a pipe-shaped member, and the drive shaft bracket 33 of the drive unit 30 is at least part of the peripheral surface of the pipe-shaped connecting member 21. is mounted so as to cover in the circumferential direction, the rigidity of that portion is improved, and the driving force of the driving portion 30 is preferably applied to the connecting member 21 (link frame 20), and the connecting member 21 It is possible to suitably receive the load applied to the driving portion 30 (drive shaft bracket 33) via the .

As described above, the tilt device 100 of the present embodiment is attached to the seat frame F in a structure that does not reduce the rigidity of the side frame 1, and the rigidity for supporting the drive unit 30 that operates the tilt device 100 is improved. and the rigidity of the link frame 20 is improved, the tilt device 100 can be operated well and can be used preferably.

It should be noted that the application of the present invention is not limited to the above-described embodiments, and can be modified as appropriate without departing from the gist of the present invention.

1 Side Frame 2 Pan Frame 10 Connection Frame 20 Link Frame 20a One End 20b Other End 20c Intermediate Part 21 Connection Member 30 Drive Part 31 Motor 32 Drive Shaft 33 Drive Shaft Bracket 33a Support Shaft 40 Tilt Bracket 41 Tilt Frame 42 Tilt Bracket Main Body 43 motor bracket 44 connection bracket 100 tilt device F seat frame

Claims (6)

A tilt device for raising and lowering a pan frame spanned between a pair of left and right side frames constituting a seat,
a link frame, to which the pan frame is fixed at one end and whose other end is rotatably attached to a connecting frame connecting the pair of left and right side frames;
a driving unit that rotates the link frame to switch the arrangement of the pan frame between a lowered position close to the pair of left and right side frames and a raised position spaced apart from the pair of left and right side frames;
A tilt device comprising: The link frames are arranged in pairs on the left and right, and connecting members are provided for connecting the pair of left and right link frames,
The drive unit includes a motor, a drive shaft rotated by the motor, and a drive shaft bracket disposed so as to be able to advance and retreat along the drive shaft,
The motor is mounted on a tilt bracket disposed between the pair of left and right side frames so as to be rotatable about the extending direction of the connecting frame. The drive shaft bracket is attached to the connecting member facing the opposite side,
One end side of the link frame is raised as the drive shaft bracket is moved to the distal end side of the drive shaft, and the link frame is moved as the drive shaft bracket is moved to the proximal end side of the drive shaft. 2. The tilting device according to claim 1, wherein one end side of the is configured to be lowered. The tilt bracket includes a tilt frame that is substantially parallel to the connection frame and arranged below the connection frame,
3. The tilt device according to claim 2, wherein the motor is mounted on the tilt frame via a motor bracket that rotatably supports the motor. The tilt bracket has a pair of bracket bodies arranged on both end sides of the tilt frame and supporting the tilt frame,
4. The tilting device according to claim 3, wherein the bracket body is fixed to a seat frame forming the seat. an intermediate portion between one end and the other end of the link frame is formed in a shape curved downward where the motor is disposed;
5. The tilt device according to claim 2, wherein both ends of said connecting member are connected to said middle portion of said link frame. The connecting member is a pipe-shaped member,
The tilting device according to any one of claims 2 to 5, wherein the drive shaft bracket is attached so as to circumferentially cover at least a portion of the peripheral surface of the connecting member.

Images