JP2009273572A - Electric leg support device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To turn a leg support without any contact interference with a seat cushion. <P>SOLUTION: The electric type leg support device 11 includes the leg support 13 and a turning mechanism 15, and the leg support 13 has a slide frame 17 and a cushion body 16 covering it. The turning mechanism 15 has an electric motor 19, a shaft 33 for performing rotating movement by the electric motor 19, back and forth movement means (a nut member 36 and an engaging member 37) for converting the rotary movement to a linear movement and performing back and forth movement, and a base frame 27 turnably provided on a first end turning axis by the back and forth movement means. The slide frame 17 is provided turnably on a second end turning axis positioned more on the leg support side than the first end turning axis, and is slidably engaged with the base frame 27. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a leg support device as a footrest that is attached to a front portion of a seat cushion, and more particularly to a leg support device that is electrically operated from a storage position to a footrest position.

  Leg support as a footrest attached to the front portion of the seat cushion is desired in order to maintain the comfort of the seated person. In particular, since seat cushions for vehicles and the like are provided in a narrow space, leg supports that are storable are required.

In general, the leg support is retracted by electrically rotating the footrest position and the retracted position, and various leg support devices have been proposed to improve the usability of the leg support (see, for example, Patent Document 1).
JP 09-206157 A

  The footrest structure described in Patent Document 1 is a structure in which the footrest moves forward when the footrest is rotated from the storage position to the footrest position. In addition to avoiding the interference, a footrest is secured to the front of the seat cushion by projecting the footrest in front of the seat cushion, thereby improving comfort.

  However, the footrest structure described in Patent Document 1 uses a complicated link mechanism that uses six links to move the footrest back and forth in the pivoting operation between the storage position and the footrest position. The mechanism is stored under the cushion. For this reason, not only the cost of the apparatus is increased, but also the layout of various mechanisms becomes difficult when there is another apparatus under the cushion.

  The present invention provides an electric leg support device that can rotate a leg support that is a footrest without causing interference with a seat cushion, can adjust the angle of a footrest position, and has a simple device configuration. The purpose is to provide.

  In order to solve the above-mentioned problems, the present invention proposes a leg support as a footrest attached to the front portion of the seat cushion, and a rotation for rotating the leg support from the storage position to the footrest position. An electric leg support device comprising a moving mechanism, wherein the leg support includes a frame member that is a frame portion of the leg support, and a cushion body that covers the frame member, and the rotating mechanism includes: An electric motor that performs forward / reverse rotation, a rotary shaft that is connected to the electric motor and performs forward / reverse rotary motion, and a forward / backward moving means that converts the rotary motion of the rotary shaft into a linear motion and moves back and forth. The first front end portion pivoting axis located at the front end portion of the seat cushion is rotatably provided so as to be engaged with the front / rear moving means and turnable by the front / rear movement. A frame, and the frame member rotates on a second tip rotation axis positioned at a tip portion of the seat cushion located on the leg support side with respect to the first tip rotation axis. The electric type characterized in that both sides of the base frame are slidably engaged with the frame member so that the frame member can be rotated by the rotation of the base frame. Leg support device.

  According to the above configuration, the forward / backward moving means is moved back and forth by the rotation of the rotating shaft body, and accordingly, the base frame rotates around the first tip end rotation axis. Then, by the rotation of the base frame, the frame member slidably engaged with the base frame can rotate about the second tip end rotation axis.

  That is, the second tip rotation axis is located on the leg support side with respect to the first tip rotation axis, and thus the rotation axis is different. However, the frame member accompanying the rotation of the base frame The both sides of the base frame are slidably engaged with the frame member so as to be able to rotate. As a result, when the leg support rotates from the storage position to the footrest position, the frame member can rotate about the second tip end rotation axis. That is, the leg support rotates about the second tip rotation axis positioned on the leg support side with respect to the first tip rotation axis, thereby preventing contact interference between the leg support and the seat cushion. can do. By slidably engaging differently rotating shafts in this way, both of them can be rotated without providing a complicated link mechanism or the like, thereby preventing contact interference between the leg support and the seat cushion. It is possible to prevent.

  Moreover, it is preferable that the said base frame is rotatably provided on the said 1st front-end | tip part rotation axis through at least a pair of left and right connection members. In consideration of the driving force of the electric motor of the rotating mechanism, the weight of the leg support, and the like, the leg support is rotated smoothly. Therefore, depending on the driving force of the electric motor and the weight of the leg support, another connecting member may be added to be rotatable. It is desirable that all the connection members that enable the base frame to rotate can be rotated on the first tip rotation axis, but if the base frame does not interfere with rotation, the added connection member is the first. May be slightly deviated from the axis of rotation of the distal end portion.

  The front / rear moving means includes a nut member screwed to the rotating shaft body, and an engaging member having one end fixed to the nut member and the other end engaged with the base frame. Therefore, it is preferable that the rotational motion of the rotating shaft body is converted into a linear motion to move back and forth. This is because the leg support is rotated by a simple device configuration.

  Further, it is preferable that both side portions of the base frame are slidably engaged with elongated holes provided on both side portions of the frame member by a pin member. The slide structure has a simple structure.

  Furthermore, the outer sides of the both side portions of the base frame can be slidably engaged with the inner side portions of the frame member via a slider. A structure with a slider in between is used.

  According to the leg support device of the present invention, the leg support that is a footrest can be rotated from the storage position to the footrest position without causing interference with the seat cushion.

  In addition, the angle of the footrest position can be easily adjusted, the device configuration is simplified, and a complicated slide mechanism can be eliminated.

Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings.
(First embodiment)
1A is a front perspective view of a leg support device according to the present invention, FIG. 1B is a rear perspective view of the leg support device, FIG. 2 is an exploded perspective view of the leg support device, and FIG. 3 is a leg support. FIGS. 4A and 4B are diagrams illustrating operation stages of the apparatus, in which FIG. 4A is a sectional view illustrating a position in a retracted state, FIG. 4B is a state position in the middle of a rotation operation, and FIG. FIG. 5 is a cross-sectional explanatory view showing the relationship between the operation of the leg support device and the link.

  As shown in the front perspective view of FIG. 1 (a) and the rear perspective view of FIG. 1 (b), the leg support device 11 according to the present invention is a footrest that rotates in the vertical direction at the front end of the seat cushion 12. Leg support 13 and a rotation mechanism 15 for rotating the leg support 13 in the vertical direction.

  The leg support 13 includes a cushion body 16 that functions as a footrest, and a slide frame 17 that is positioned inside the cushion body 16 and that pivots up and down.

  The cushion body 16 is composed of a material having a predetermined elasticity so that the foot is placed directly as a footrest, and is usually a laminate of a plurality of materials.

  The slide frame 17 includes a substantially rectangular frame 18, and the cushion body 16 is supported by the frame 18. Long holes 21 (21a, 21b) as slide grooves are provided in the longitudinal direction on the left and right sides of the frame 18, respectively. This is for slidably connecting to the base frame 27 as will be described later. Further, one end of a link member 22 (22a, 22b) is rotatably attached to both the left and right ends of the front end side of the frame body 18. The other end of the link member 22 (22a, 22b) is rotatably attached to the rotation center points 25a, 25b of plate-like attachment members 23 (23a, 23b) provided on the left and right of the front end of the seat cushion frame 24, respectively. It has been. The rotation center points 25a and 25b are located on the second tip end rotation axis.

  Further, as shown in FIG. 3, the lower part of the front end of the seat cushion is a rotating shaft body that rotates in the forward and reverse directions by the rotation of the electric motor 19, the mounting plate member 30, and the electric motor 31 that are driving sources of the leg support device 11. A shaft shaft 33 is provided. The attachment plate member 30 is attached to the seat cushion frame 24 (see FIG. 1A) positioned at the upper part of the vehicle body frame 39 (shown by hatching), and the electric motor 31 is provided on the attachment plate member 30. It is pivotally mounted on the fixture 40.

  As shown in the exploded perspective view of FIG. 2, a base frame 27 that rotates the slide frame 17 is provided below the slide frame 17. The base frame 27 is a horizontally long plate-like member having folded portions on the left and right sides. The left and right folded portions are connected to the elongated hole portions 21 (21a, 21b) of the slide frame 17 from the inside by the pin members 29 (29a, 29b). Installed slidably.

  Further, the slider 20 is attached to the center position of the upper surface of the base frame 27, and the slider 20 is bitten between the base frame 27 and the slide frame 17, and the slide operation of the slide frame 17 is restricted. ing.

  One end of a pair of left and right connecting members 28 (28a, 28b) is attached to the lower part of the plate-like portion of the base frame 27, and the other end of the link member 28 (28a, 28b) is the seat cushion frame 24. Are attached to rotation center points 32a and 32b on plate-like attachment members 31 (31a and 31b) provided on the left and right sides of the tip of the plate, respectively. The rotation center points 25a and 25b are located on the first tip end rotation axis.

  One end of the link member 35 (35a, 35b) is further rotatably attached to the outer side of the left and right folded portions of the base frame 27 by a pin member, and the other end of the link member 35 (35a, 35b) is The seat cushion frame 24 is pivotally attached to pivot center points 40a and 40b on attachment members 34 (34a and 34b) provided on both sides of the distal end of the seat cushion frame 24, respectively. Although the rotation center points 40a and 40b are not on the first tip end rotation axis, they are located close to the first tip end rotation axis, and there is a hindrance to the rotation of the base frame 27. Absent.

  Here, the link members attached to the base frame 27 are a total of four link members 28 (28a, 28b) and link members 35 (35a, 35b). Rotation center points 32a and 32b on the attachment members 31 (31a and 31b) provided on the left and right sides of the front end of the seat cushion frame 24 and rotation center points on the attachment members 34 (34a and 34b), respectively. It is rotatably attached to 40a and 40b. The rotation center points 32a and 32b are on the first tip rotation axis, and the rotation center points 40a and 40b are at positions close to the first tip rotation axis. It has been. Further, the first rotation axis is located on the seat cushion side as compared to the second tip end rotation axis. That is, the first tip rotation axis that is the rotation center of the base frame is closer to the seat cushion 12 and the seat cushion frame 24 than the second tip rotation axis that is the rotation center of the slide frame 17 described above. positioned.

  The base frame 27 is attached to an engaging member 37 fixed to the nut member 36. Therefore, the base frame 27 is rotated up and down by the back and forth movement of the nut member 36 engaged with the shaft 33.

  Next, operation | movement of the leg support apparatus 11 which concerns on this invention is demonstrated with reference to Fig.3 (a)-(c).

  FIG. 3A is a view showing a longitudinal section when the leg support 13 is in the retracted state. The leg support 13 is suspended from the front lower portion of the seat cushion 12. In the figure, the cushion body 16 of the leg support 13 is indicated by a chain line.

  When the operation switch (not shown) of the leg support device 11 is operated and operated in the retracted state of FIG. 3A, the leg support 13 is rotated by the rotation mechanism 15 as shown in FIG. start. That is, when the operation switch is turned on and the electric motor 19 starts rotating, the shaft 33 connected via the gear unit also starts rotating. The nut member 36 screwed to the shaft shaft 33 moves in a state of being screwed to the shaft shaft 33 in a direction away from the electric motor 19 side.

  Referring to FIG. 2 together, the engaging member 37 fixed to the moving nut member 36 pushes up the base frame 27, so that the base frame 27 is seat cushion frame 24 by the link members 28 (28 a, 28 b). The mounting members 31 (31a, 31b) provided on the left and right of the tip of the mounting member 31 rotate about the rotation center points 32a, 32b, respectively. That is, the first tip part rotation axis is used as the rotation axis. The link member 35 (35a, 35b) rotates around the rotation center points 40a, 40b, but the rotation center points 40a, 40b are close to the rotation center points 32a, 32b, so There is no hindrance to rotation.

  The left and right folded portions of the base frame 27 are attached to the long hole portions 21 (21a, 21b) on the side of the slide frame 17 with the pin members 29 (29a, 29b). The slide frame 17 is also rotated upward by the rotation.

  As described above, the slide frame 17 is rotatably attached to the rotation center points 25a and 25b on the second tip end rotation axis. The second tip rotation axis is located farther from the seat cushion 12 and the seat cushion frame 24 than the first tip rotation axis and is located on the leg support side. The base frame 27 can be rotated by sliding in the long hole portion 21 (21a, 21b). As a result, as shown in FIG. 3C, the slide frame 17 can be rotated further forward with respect to the base frame 27, that is, away from the seat cushion 12 and the seat cushion frame 24. Contact interference with the seat cushion 12 can be avoided.

  The leg support 13 is set to stop rotating when it is in a substantially horizontal state, and can be stopped by a switch operation at an arbitrary rotation angle position even during the rotation.

  As shown in FIG. 4, when the leg support 13 that has been stopped and used at a desired angular position is stopped and stored, it can be returned to the storage position by operating a switch (not shown). By reversing the rotation of the electric motor 19 by the switch operation, the nut member 36 moves to the electric motor 19 side, and the engaging member 37 fixed to the nut member 36 rotates the base frame 27 to the storage position. In addition, the slide frame 17 is also rotated to the stored state.

  The stowed state is when the leg support 13 comes into contact with and hangs down from the lower wall surface of the seat cushion 12.

As described above, the leg support device 11 according to the present invention is slidably attached to the slide frame 17 that is a frame member of the leg support 13 and the base frame 27 that applies a rotation operation to the slide frame 17 as shown in FIG. ing. Further, the second tip rotation axis that is the rotation axis of the slide frame 17 is positioned further to the leg support side than the first tip rotation axis that is the rotation axis of the base frame 27. Therefore, the slide frame 17 slides forward with respect to the base frame 27 when rotated. That is, it is possible to prevent contact interference with the seat cushion due to the rotation of the leg support with a simple device configuration.
(Second Embodiment)
Next, a second embodiment of a leg support device according to the present invention will be described with reference to the drawings. FIG. 5A is a front perspective view of the second embodiment of the leg support device, FIG. 5B is a partially enlarged plan view for explaining the sliding operation, and FIG. 6A is a partial cross-section of the rotating mechanism. FIG. 6B is a schematic diagram illustrating the operation of the leg support device. In the drawings, the same reference numerals are assigned to the same names as those in the first embodiment. Further, the description will be focused on parts different from the first embodiment.

As shown in FIG. 5A, one of the features of this embodiment is that an electric motor 31 and a shaft shaft 33 as a rotating shaft body are housed in the lower part of the seat cushion 12 and are screwed onto the shaft shaft 33. The engaging member 41 fixed to the combined nut member 36 is attached to the link member 28 (28a, 28b). Of the link members 28 (28a, 28b), one is attached to the base frame 27 and the other is attached to the engaging member 42 as viewed from the rotation center points 32a, 32b. The engaging member 42 is positioned between the link members 28a and 28b and is rotatably attached.

  As a result, the link member 28 (28a, 28b) is rotated about the rotation center points 32a, 32b as the nut member 36 moves back and forth.

  A further feature of the present embodiment is that the slide operation of the base frame 27 and the slide frame 17 is performed via the slider 43 as shown in FIG. The slider 43 is placed in an engaged state between the outer side portion of the base frame 27 and the inner side portion of the slide frame 17, and regulates the sliding operation between the base frame 27 and the slide frame 17. Yes. Therefore, it is not necessary to provide the long hole portion 21 (21a, 21b) as in the first embodiment. The slider 43 is provided with a stopper (not shown) for stopping the sliding operation at a predetermined position in order to restrict the sliding operation.

  Next, the operation of the second embodiment will be described with reference to FIG.

As shown in FIG. 6A, when the leg support 13 is in the storage state, the engaging member 42 and the base frame 27 are connected at the connection position 45 when stored. When the shaft 33 is rotated by the rotation of the electric motor 19, the nut member 36 moves forward to the leg support 13. When the link member 28 (28a, 28b) is rotated about the rotation center points 32a, 32b by the engaging member 42 fixed to the nut member 36, the base frame 27 is attached to the legs of the leg support 13. Rotates to the loading position. At this time, the engagement member 42 and the base frame 27 are connected at the footrest connection position 46.
At this time, with the rotation of the link member 28 (28a, 28b), the link member 35 (35a, 35b) also rotates about the rotation center points 40a, 40b. The rotation center points 40a and 40b are not on the first tip rotation axis, but are close to each other, so that the rotation of the base frame 27 is not hindered.

  Further, as the base frame 27 rotates, the slide frame 17 also rotates to the footrest position, but rotates about the rotation center points 25a and 25b of the link members 22 (22a and 22b). The rotation center points 25a and 25b are on the second tip end rotation axis.

  Since the second tip rotation axis is positioned further on the leg support side than the first tip rotation axis, which is the rotation axis of the base frame 27, the slide frame is rotated when it is turned. 17 is slid forward with respect to the base frame 27 as in the first embodiment, so that the leg support 13 does not interfere with the seat cushion 12.

(A) is a front perspective view of the leg support apparatus which concerns on this invention, (b) is a back perspective view of a leg support apparatus similarly. The disassembled perspective view of a leg support apparatus similarly. It is a figure which shows the step of operation | movement of a leg support apparatus, (a) is a sectional state which shows the position of a stowed state, (b) is the state position in the middle of rotation operation, (c) is the position of a footrest state, respectively. Cross-sectional explanatory drawing which shows the relationship between operation | movement of a leg support apparatus and a link. It is a figure which shows 2nd Embodiment of the leg support apparatus which concerns on this invention, (a) is a front perspective view of a leg support apparatus, (b) is a partially expanded plan view explaining slide operation | movement of a leg support apparatus. It is a figure which shows 2nd Embodiment of the leg support apparatus shown in FIG. 5, (a) is a partial cross section schematic diagram of a rotation mechanism, (b) is operation | movement explanatory drawing of a leg support apparatus.

Explanation of symbols

DESCRIPTION OF SYMBOLS 11 Leg support apparatus 12 Seat cushion 13 Leg support 15 Rotation mechanism 16 Cushion body 17 Slide frame (frame member)
18 Frame 19 Electric motor 25a, 25b Rotation center point (second tip rotation axis)
27 Base frame 32a, 32b, 40a, 40b Tip rotation center point (first tip rotation axis)
33 Shaft shaft 36 Nut member 37, 42 Engagement member

Claims (5)

An electric leg support device comprising a leg support as a footrest attached to a front portion of a seat cushion, and a rotation mechanism for rotating the leg support from a storage position to a footrest position. ,
The leg support has a frame member that is a frame part of the leg support, and a cushion body that covers the frame member,
The rotating mechanism includes an electric motor that performs forward and reverse rotation, a rotating shaft body that is connected to the electric motor and performs forward and reverse rotating motion, and a rotational motion of the rotating shaft body is converted into a linear motion before and after. Forward and backward moving means for moving;
A base frame that is pivotably provided on a first distal end pivot axis located at the distal end of the seat cushion so as to be engaged with the forward / backward movement means and pivotable by the forward / backward movement; Have
The frame member is rotatably provided on a second distal end rotation axis positioned at the distal end portion of the seat cushion located on the leg support side with respect to the first distal end rotation axis. An electric leg support device, wherein both side portions of the base frame are slidably engaged with the frame member so that the frame member can be rotated by the rotation of the base frame.   2. The electric leg support device according to claim 1, wherein the base frame is rotatably provided on the first tip portion rotation axis through at least a pair of left and right connecting members. .   The front / rear moving means includes a nut member screwed to the rotating shaft body, and an engagement member having one end fixed to the nut member and the other end engaged with the base frame. The electric leg support device according to claim 1 or 2, wherein the rotary motion of the rotary shaft body is converted into a linear motion to move back and forth.   4. The base frame according to claim 1, wherein both side portions of the base frame are slidably engaged with elongated holes provided on both side portions of the frame member by a pin member. 5. Electric leg support device. 4. The electric leg according to claim 1, wherein outer sides of both side portions of the base frame are slidably engaged with inner sides of both side portions of the frame member via a slider. 5. Support device.

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