JPH0281740A - Lumber support device - Google Patents

Abstract

PURPOSE:To reduce fatigue and sooner recover a driver from fatigue with a massaging function by locating the end side of an output shaft in a lumber abutting portion, and providing a pulsation giving mechanism for giving pulsation to said lumber abutting portion with the rotation of the output shaft. CONSTITUTION:When a roller plate 17 provided on the front end side of an output shaft 14 is rotated by the rotation of the output shaft 14, rollers 21, 21 provided on the roller plate 17 are released from recesses 16d, 16d in a lumber plate 16 to move circumferentially on the lumber plate 16. The lumber plate 16 will be cyclically reciprocated, i.e. pulsated by the movement of the rollers 21, 21 on the lumber plate 16, so that the pulsation is transmitted through the lumber plate 16 to the lumber abutting portion of a seat back 32 to contribute to the recovery of a driver from fatigue of his lumbers.

Description

[Detailed description of the invention] [Purpose of the invention]

(Industrial Application Field) The present invention is a lumbar support device that is used to adjust the supporting force of the lumbar vertebrae contacting portion in a seat of a vehicle, for example, to obtain an appropriate driving posture and to help recover from fatigue. It is related to. (Prior art) Conventionally, as for the lumbar support equipment described above,
For example, some air mattresses are equipped with a plurality of air mattresses built into the lumbar vertebrae contacting position of the seat, a pump that supplies air to these air mattresses, and a motor that drives the pumps. With this lumbar support device, one occupant operates the motor by operating the appropriate switch, supplies air from the pump to the air mattress, inflates it, and adjusts the supporting force of the lumbar vertebrae contact area, allowing the occupant to maintain an appropriate driving posture. It is now possible to obtain it. (Problem to be Solved by the Invention) However, although the above-mentioned conventional lumbar support device can reduce the fatigue of the occupant when driving for a long time, it does not have a function to help recover from the fatigue. Therefore, even if a seat is equipped with such a lumbar support device, if the driver continues to drive, fatigue will accumulate in the same way as a seat without a lumbar support device. There was an issue. (Purpose of the Invention) This invention has been made by focusing on the above-mentioned conventional problems, and aims to increase the supporting force of the lumbar vertebrae contacting portion of the seat to the vJ node so that an appropriate driving posture can be obtained. By this,
An object of the present invention is to provide a lumbar support device that can not only reduce fatigue when driving for a long time, but also contribute to faster recovery from fatigue by having a pine surge function.

[Structure of the Invention] (Means for Solving the Problems) A lumbar support device according to the present invention includes a motor that can rotate in forward and reverse directions, a worm that rotates integrally with the output shaft of the motor, and a worm wheel that meshes with the worm. and,
an output shaft that has a male threaded portion formed on the axial center portion of the worm wheel and that is screwed into an internal threaded portion, and that moves in the axial direction in a threaded pair with the worm wheel;
A clutch mechanism is provided between the worm wheel and the output shaft to cut off the transmission of the rotation of the worm wheel to the output shaft, and the end side of the output shaft is located in the lumbar vertebra contacting part in the seat. The present invention is characterized in that a pulsation mechanism is provided on the end side to apply pulsation to the lumbar vertebra contacting portion of the seat by rotation of the output shaft, and this configuration is used as a means to solve the problem. It is something. (Function) In the lumbar support device according to the present invention, when the motor is rotated in the forward direction, the rotation of the motor is decelerated by the worm and the worm wheel, and due to the low speed rotation of the worm wheel, the output shaft that is a screw pair with the worm wheel is rotated by the worm. Moves linearly relative to the wheel in its axial direction. By pushing out the lumbar vertebra abutting part of the seat where the end side of this output shaft is located, the supporting force at the lumbar vertebra abutting part of the seat increases, and the amount of extrusion is adjusted as appropriate by the operation of the motor. This makes it possible to take an appropriate driving posture. Additionally, when the motor continues to rotate in the forward direction, the rotation of the worm wheel is transmitted to the output shaft by the clutch mechanism provided between the worm wheel and the output shaft that moves in the axial direction with respect to the worm wheel. , the output shaft stops moving in its axial direction and at the same time starts rotating integrally with the worm wheel. As this output shaft rotates, it becomes pulsating! The i-mechanism applies pine surge to the portion of the seat that contacts the lumbar vertebrae, improving blood circulation in the lumbar region of the occupant, thereby contributing to recovery from fatigue. (Example) Hereinafter, an example of the lumbar support device according to the present invention will be described based on FIGS. 1 to 6. That is, the lumbar support device 1 includes a motor 2 as a power source capable of forward and reverse rotation, and this motor 2 is provided on a base plate 3 fixed to a seat frame 31 of a seat 30. A motor base 5 is attached to the base plate 3 by a port 4, and a pair of motor brackets 6 are attached to the front and rear ends of the motor base 5 (left and right ends in FIG. 1).
．． 6 is attached by bolts 7.7, and the motor 2 is fixed to the motor bracket 6.6 in such a way that the motor output shaft 2a with the worm 8 is located between the motor brackets 6.6. The worm 8 is disposed between the motor bracket 6.6.
A worm wheel 9 is provided which meshes with the motor 2 to reduce the rotation of the motor 2. This worm wheel 9 has a hollow shape and has boss parts 9b and 9c at the front and rear ends of a gear part 9a, and on the outside of the boss part 9b on the rear end (right end in FIG. 1) side.
A substantially cylindrical clutch holder 10 is fitted and fixed. Then, this worm wheel 9 and clutch holder 1
0 has thrust bearings 11.11 fitted in the boss portion 9C on the front end side of the worm wheel 9 and the post fitting portion 10a of the clutch holder 10, respectively. , 11 are supported by the motor bracket 6.6 by fixing them with a plurality of blocks 12a, 12b, 12c provided between the motor brackets 6.6. In this case, the axes of the worm wheel 9 and clutch holder 10 are perpendicular to the motor bracket 6°6, and the holder through hole 6 of the rear motor bracket 6
A clutch plate 13 constituting a clutch mechanism is embedded in the small diameter portion 10b of the clutch holder 10 that protrudes from the hole 13a. It is fixed by 13a. Further, the worm wheel 9 is formed with a female threaded portion 9d, and the output shaft 1 is formed with a male threaded portion 14a (simply shown in FIGS. 5 and 6) corresponding to this female threaded portion 9d.
4 is provided so as to form a threaded pair with the worm wheel 9. The clutch plate 1 is provided on the rear end side of the output shaft 14.
A substantially cylindrical clutch base 15 having a bottom portion 15a which together with 3 constitutes a clutch mechanism is provided. It is fixed to the small diameter male threaded portion 14b with a nut 15C. On this occasion,
The male threaded portion insertion hole 15d of the clutch base 15 is formed into a substantially oval shape, and a flat portion 1 is formed on the rear end small diameter male threaded portion 14b.
4c prevents the clutch base 15 from spinning with respect to the output shaft 14. In other words, the output shaft 14 is rotated to the first position by the rotation of the worm wheel 9.
The opening end 15b of the clutch base 15 comes into contact with the clutch plate 13 when the clutch base 15 moves to the left in the figure. This is so that the rotation of the worm wheel 9 can be reliably transmitted to the output shaft 14. On the front end side of the output shaft 14, there is a small diameter guide portion 14d.
and a front end small-diameter male threaded portion 14e, and the small-diameter guide portion 14d is connected to the seat back 32 of the seat 30.
It is inserted through a guide hole 16a formed at the center of a ramper plate (pulsation imparting mechanism) 16 provided in the. Then, a roller plate (pulsation imparting mechanism) 1 that abuts on the front end small-diameter male screw portion 14e so as to be able to separate from the ramper plate 16.
7, the front end side of the output shaft 14 is connected to the seat back 32 of the seat 30. As shown in FIG. 3, the ramper plate 16 has a plurality of hook holes 16 at its left and right ends (upper and lower ends in FIG. 1).
b, and this ramper plate 16 has a plurality of hooks 18 hooked to S-shaped springs 35 that support the skin material 33 and pad 34 of the seat back 32, which are attached to the hook holes 16b by nuts 16c. This allows it to be fixed to the seat back 32. The ramper plate 16 also has recesses (pulsation imparting mechanism ) 16d and 16d are formed. As shown in FIG. 4, the roller plate 17 is
The male threaded portion insertion hole 17a in the center thereof is formed into a substantially oval shape, and a flat portion 14f is formed in the small diameter male threaded portion 14e at the front end of the output shaft 14. It is fixed by a nut 17b in a state where it is prevented from rotating by the small diameter male threaded portion 14e. Further, the roller plate 17 has a plurality of locations on the same circumference centered around the male threaded portion insertion hole 17a (180° in this embodiment).
Through-holes 17c, 17c are formed at two different symmetrical positions, each having an oval shape from the front.
, 17c when the roller plate 17 rotates together with the output shaft 14. Recess 16d of ramper plate 16 every half turn. 16d. In these through holes 17c, 17c, rollers (pulsation imparting mechanism) 21.21 made of synthetic resin are pivotally supported by pins 20.20 inserted from the outer peripheral side of the roller plate 17 toward the center thereof. are provided, and in this case, these rollers 21.degree. 21 have a diameter dimension larger than the wall thickness dimension of the roller plate 17. That is, by rotating the roller plate 17 together with the output shaft 14 and having the rollers 21.21 move circumferentially on the ramper plate 16 and periodically fit into the recesses 16d, 16, Perform periodic reciprocating movement, that is, pulsation, in the left and right direction in Figure 1,
Via the ramper plate 16, it is possible to apply pulsation in the direction of the arrow in FIG. 2 to the lumbar vertebra contacting portion of the seat back 32. In this case, the recesses 16d, 16d of the ramper plate 16
Bolts 23.23 are screwed into the bottom portion of the oscilloscope, and the magnitude of the pulsation can be changed by adjusting the screwing amount of these bolts 23.23. Note that an output shaft 14 is provided on the front end side of the base plate 3.
A proximity switch (not shown) is provided for stopping the output shaft 14 at a predetermined position when the output shaft 14 is moved rightward in FIG. Further, when applying pulsations to the seat back 32, a relatively large load is placed on the motor 2, so the motor 2 is not provided with pulsations continuously for a long period of time. No timer is connected. Next, the operation of the ramper support device 1 will be explained. First, when a switch (not shown) is operated to rotate the motor 2 in the forward direction, the rotation of the motor 2 is decelerated by the worm 8 and the worm wheel 9, and due to the low speed rotation of the worm wheel 9, the output shaft 14 is rotated to the left in FIG. move in the direction. As this output shaft 14 moves, the roller plate 17 presses the ramper plate 16 to the left in FIG. By being pushed outward as shown by the imaginary line, the supporting force of the lumbar vertebra contacting portion of the seat back 32 is increased. By appropriately adjusting the amount of push-out by operating a switch, an appropriate driving posture can be taken. Further, when a switch not shown in Figure 1 is operated to further rotate the motor 2 in the forward direction, the output shaft 14 moves to the left in Figure 1, causing the seat back 32 to hit the lumbar vertebrae via the roller plate 17 and ramper plate 16. Although the contact portion is further pushed outward, the clutch base 15 provided at the rear end of the output shaft 14 comes into contact with the clutch plate 13 provided at the rear end side of the worm wheel 9 as shown in FIG. At this point, the output shaft 14 stops moving to the left in FIG. At the same time, the rotation of the worm wheel 9 is transmitted to the output shaft 14 via the clutch plate 13 and the clutch base 15, and the output shaft 14 works together with the worm wheel 9 to rotate in the direction of the arrow in FIG. Start. When the roller plate 17 provided on the front end side of the output shaft 14 begins to rotate with the rotation of the output shaft 14, the rollers 21, 21 provided on the roller plate 17 separate from the recesses 16d, 16d of the ramper plate 16. and moves in the circumferential direction on the ramper plate 16 (sixth
), and the rollers 21.21 are
During its movement, it periodically passes through the recesses 16d, 16d, each time. The ramper plate 16 moves to the position shown in phantom lines in FIG. That is, by the rollers 21.21 moving on the ramper plate 16, the ramper plate 16
periodically moves back and forth in the left-right direction in FIG. 1, that is, pulsates, and the pulsation in the direction of the arrow in FIG. This will contribute to recovery from fatigue. Then, when a predetermined period of time has elapsed, a timer for protecting the motor 2 is activated and the motor 2 is stopped. Here, if the amount of extrusion of the seat back 32 corresponding to the waist a per tm fi is to be reduced or eliminated, the motor 2 is rotated in the opposite direction by operating a switch. As a result, the worm wheel 9 rotates in the opposite direction, the contact between the clutch plate 13 and the clutch base 15 is released, and the output shaft 14 moves to the right in FIG. At this time, even if the switch operation is continued, a proximity switch (not shown) is activated and the output shaft 14 stops moving at a predetermined position, so that the output shaft 14 will not move too far to the right in FIG. As explained above, in this embodiment, the recesses 16d, 16d in the ramper plate 16 are used as the pulsation imparting mechanism.
At the same time, a roller 21. is formed on the roller plate 17.
21, the rollers 21°21 are caused to pass through the recesses 16d, 16d to generate pulsations, and the pulsations are applied to the lumbar vertebra contacting portion of the seat back 32 via the ramper plate 16. However, the pulsation imparting mechanism is not limited to, for example, a substantially hemispherical convex portion is formed on the ramper plate 16 side, and a concave portion is formed on another plate corresponding to the roller plate 17, and the convex portion is formed in the concave portion. It is also possible to apply a configuration in which pulsation is generated and applied by engaging and disengaging from the oscilloscope. Further, the detailed configuration of the present invention is not limited to the above-described embodiments, and for example, a concave portion (or a convex portion) may be formed in the clutch plate 13 that constitutes the clutch mechanism, and the clutch mechanism may also be constituted. clutch base 1
By forming a convex part (or concave part) corresponding to the concave part (or convex part) in 5 and engaging the concave part (or convex part) of the clutch plate 13 and the convex part (or concave part) of the clutch base 15. , it is also possible to transmit the rotation from the worm wheel 9 to the output shaft 14.

【Effect of the invention】

As described above, the lumbar support device according to the present invention includes a motor capable of forward and reverse rotation, a worm that rotates integrally with the output shaft of the motor, a worm wheel that meshes with the worm, and a shaft of the worm wheel. an output shaft that has a male threaded portion formed on the core portion and that is screwed into the female threaded portion and that moves in the axial direction forming a threaded pair with the worm wheel, and between the worm wheel and the output shaft; is provided with a clutch mechanism that interrupts transmission of the rotation of the worm wheel to the output shaft, and the end side of the output shaft is located in the lumbar vertebra contacting part of the seat, and the end side is provided with a clutch mechanism that interrupts transmission of the rotation of the worm wheel to the output shaft. The structure is equipped with a pulsation mechanism that applies pulsation to the part of the seat that touches the lumbar vertebrae, which adjusts the supporting force of the part of the seat that makes contact with the lumbar vertebrae so that an appropriate driving posture can be obtained, making it easier to drive for long periods of time. This has an extremely excellent effect in that it can not only reduce fatigue at times, but also contribute to faster recovery from that fatigue.

[Brief explanation of the drawing]

FIG. 1 is an explanatory cross-sectional view from a plane showing a state before operation of a lumbar support device according to an embodiment of the present invention, and FIG. 2 is a portion of the seat that contacts the lumbar vertebrae when the lumbar support device of FIG. 1 is in operation. FIGS. 3 and 4 are front views of the ramper plate and 10-love plate of the lumbar support device shown in FIG. 1, respectively, and FIGS. This shows the operating state of the lumbar support device, and Fig. 5 is a cross-sectional explanatory view from the plane direction showing the state when the output shaft stops moving in the linear direction, and Fig. 6 shows the output shaft and rollers. FIG. 6 is a top view showing a state in which the plate is rotating together with the worm wheel. 1... Lumbar support device, 2... Motor, 2a... Motor output shaft, 8... Worm. 9... Worm wheel, 9d... Female threaded portion, 13... Clutch plate (clutch mechanism), 14
...output shaft, 14a...male thread part, 15...clutch base (clutch mechanism), 16...
- Ramper plate (pulsation imparting mechanism). 16d... Concave portion (pulsation imparting mechanism). 17...Roller plate (pulsation imparting mechanism), 1...
Roller (pulsation imparting mechanism) 30... Sheet.

Claims (1)

[Claims] (1) A motor that can rotate in forward and reverse directions, a worm that rotates integrally with the output shaft of the motor, a worm wheel that meshes with the worm, and a worm wheel that is formed at the axial center of the worm wheel and that is screwed into an internal thread. An output shaft having a threaded portion and moving in the axial direction in a threaded pair with the worm wheel is provided, and an output shaft is provided between the worm wheel and the output shaft to transmit and block the rotation of the worm wheel to the output shaft. A clutch mechanism is provided, the end side of the output shaft is located in the lumbar vertebrae abutting part of the seat, and the end side has a pulsation mechanism that applies pulsation to the lumbar vertebrae abutting part of the seat by rotation of the output shaft. A lumbar support device characterized by having a mechanism.