JPS63247134A - Adjusting mechanism for vertically adjusting seat - Google Patents

Abstract

PURPOSE:To make it possible to steplessly adjust the height of a seat by assembling swing plates, respectively to cam sections formed on two rotary shafts which are arranged coaxially so that they may be swingably manipulated together, thereby rotary plates are rotated through the meshing of gears in association with the swing motion thereof. CONSTITUTION:The lower end part of a first rotary shaft 6 is made to pierce through an axial hole 2 formed substantially at the center of an attachment 1, and the first rotary shaft 6 has a small diameter intermediate section 20 whose outer periphery is fitted thereon with a secondary rotary shaft 19. Both rotary shafts 6, 19 are formed therein with cam sections 7, 21, respectively, onto which are fitted through-holes 9, 24 in a first swingable plate 8 and a second swingable plate 22 that are supported to one of retaining shafts 3. Further, internal teeth 10, 25 are formed about the through holes 9, 24 in the swingable plates 8, 22, and are meshed with external teeth 14, 27 having a tooth number less than that of the internal teeth 10, 25 by one or two. Further, knobs 38, 34 are manipulated to rotate rotary plates 12, 23 through the intermediary of the rotary shafts 6, 19 and the swingable plates 8, 22.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to an adjustment mechanism for vertically adjusting a seat.

(Prior Art) Conventionally, a motor-based stepless adjustment device has been known as an adjustment mechanism for vertically adjusting a seat, etc., but a stepless adjustment using a gear has not been known.

(Problems to be Solved by the Invention) The stepless adjustment device using a motor has a characteristic that it is expensive. However, manufacturing a stepless adjustment device using gears would be more expensive than a motor, but the present invention has added special ingenuity, and even the device using gears is cheaper and simpler than the one using a motor. This is a stepless adjustment device that is easy to manufacture.

(Means for solving the problem) Therefore, the present invention forms the first cam part 7 of the first rotating shaft 6 and the second cam part 24 of the second rotating shaft 19 coaxially, and the first cam part 7 is fitted with the first through hole 9 of the first swing plate 8,
The first swing plate 8 has internal teeth lO centered around the first through hole 9.
is provided so that when the first cam portion 7 rotates within the first through hole 9, the internal teeth 10 swing eccentrically, and the external teeth 14 of the first rotation plate N2 are fitted into the internal teeth 10. and the external tooth 1
4 has fewer teeth by 1 to 2 than the internal teeth 10,
A second rocking plate η formed in the same manner as the first rocking plate 8 is formed on the second cam portion 24 with a partition plate 16 in between, and a second rocking plate η formed similarly to the first rocking plate 8. Two rotating plates n are fitted together, and the first rotating shaft 6 and the second rotating shaft 19 are rotated separately to form an adjustment mechanism for vertically adjusting the seat.

[Example] An example of the present invention will be described with reference to the drawings.
A shaft hole 2 is formed approximately at the center of the shaft hole 2, and an upper shaft 3 is formed on both sides of the shaft hole 2.
．． 3 is provided with an insertion opening 4.4 for the threaded portion 5 formed at the end thereof,
The lower end of the first rotating shaft 6 is inserted into the shaft hole 2, and the upper shaft 3 is inserted into the insertion opening 4.
．． Insert the screw part 5.5 of No.3.

A first cam portion 7 is formed at the lower end of the first rotating shaft 6 .

Reference numeral 8 denotes a first swing plate, which has a first through hole 9 on its base side that engages with the first cam portion 7, and is provided with internal teeth 10 around the first through hole 9. Reference numeral 11 denotes a long hole into which the upper shaft 3 formed on the tip side of the first rocking plate 8 is fitted so as to be able to swing freely. 11 is city axis 3
In order to swing around the first swing plate 8, the first swing plate 8 swings eccentrically.

A first rotating plate 12 is provided on the side of the first swinging plate 8 . A shaft hole 13 into which the first rotating shaft 6 fits is formed in the base of the first rotation plate 12, and external teeth 14 which engage with the internal teeth 10 are formed.

The external teeth 14 have one to two fewer teeth than the internal teeth 10, and only a portion of the external teeth 14 and the internal teeth 10 engage.

15 is a rotating end of the first rotating plate 12;
Connect various things to.

16 is a partition plate, and in the center of the partition plate 16 is the first rotating shaft 6.
A through hole 17 is formed through which the upper shaft 3 is inserted.
．． A through hole 18.18 is formed through which No. 3 is inserted.

The first rotating shaft 6 becomes a small diameter part from the middle, and the second rotating shaft 19 is fitted on the outer periphery of the small diameter part. 21 is the second rotating shaft 1
This is the second cam part provided at 9.

The first rotating shaft 6 and the second rotating shaft 19 have the same diameter. The second rotating shaft 19 has a second swinging plate 22 formed in the same manner as the first swinging plate 8 with the partition plate 16 in between, and a second swinging plate 22 formed similarly to the first swinging plate 8. Fit the two-turn plate n. 24 is a through hole of the first swing plate η, 25 is an internal tooth of the second swing plate η, 26 is a long hole of the second swing plate η, n is an external tooth of the second swing plate 23, and 28 is a hole of the second swing plate η. The through hole 29 of the second rotation plate 23 is the rotation end of the second rotation plate n, and various objects are connected to the rotation end 4.

Further, 30 is a fixed plate, 31 is a through hole through which the upper end of the second rotating shaft 19 is inserted, X is a through hole through which the screw part of the upper end of the city shaft 3 is inserted, The second knob is attached to the corner shaft section, the through hole from which the corner shaft section at the upper end of the small diameter section protrudes, 38 is the first knob that is attached to the corner shaft section g, and 39 is the screw on the corner shaft section. This is the matching fixing screw.

(effect) Next, we will discuss the effect.

When the first knob 38 is rotated, the square shaft portion n, the small diameter portion, the first rotating shaft 6, and the first cam portion 7 rotate, and the rotation of the first cam portion 7 causes the first through hole 9 to be rotated. The rocking plate 8 is rocked and rotated. When the first rocking plate 8 swings and rotates, the internal teeth 10 rotate eccentrically, causing the external teeth 14 that mesh with these to rotate one tooth per rotation of the first rocking plate 8. The rotating end 15 of the rotating plate ν is rotated about the first rotating shaft 6. therefore,
The object connected to the rotating end 15 is moved. In this case, since the second rotating shaft 19 does not rotate, the second rocking plate η,
The second rotating plate 23 does not move together.

Next, when the second knob 34 is rotated, the second cam part 21
The through hole 24 fitted with the second rocking plate
is oscillated in the same manner as the first oscillating plate 8. Therefore, the external teeth n, which are partially meshed with the internal teeth δ of the second oscillating plate η, are moved by -tooth per rotation of the second oscillating plate η, so that the second rotating plate 23 is rotated. The four ends can be moved in the same way.

(Effects) Conventionally, stepless adjustment has been performed using a motor, and stepless adjustment using gears is not known. Stepless adjustment using a motor has the characteristic of being expensive. Stepless adjustment using gears is more expensive, but the present invention adds special ingenuity to achieve stepless adjustment using gears that is inexpensive and easy to manufacture.

However, in the present invention, the first cam part 7 of the first rotating shaft 6 and the second cam part 24 of the second rotating shaft I9 are formed coaxially, and the first cam part 7 is provided with a first rocking plate. 8, the first swing plate 8 is provided with internal teeth 10 centered on the first through hole 9, and the first cam portion 7 is fitted within the first through hole 9. When rotated, the internal teeth 10 swing eccentrically, and the internal teeth 1
0 is fitted with the external teeth 14 of the first rotation plate ν, the external teeth 14 have a number of teeth 1 to 2 fewer than the internal teeth IO, and the second cam portion is connected with a partition plate 16 in between. A second swing plate η formed similarly to the first swing plate 8 and a second swing plate 23 formed similarly to the first swing plate 12 are fitted into the second swing plate 24. One rotation axis 6 and second rotation axis 19
This is due to a conflict with the adjustment mechanism for adjusting the seat up and down, etc., which is rotated separately, so when the first knob 38 is rotated, the square shaft section 37, the small diameter section, the first rotating shaft 6, and the first cam section are rotated. 7 rotates, and the rotation of the first cam part 7 swings the first swing plate 8 through the first through hole 9. When the first swing plate 8 swings and rotates, the internal tooth lO rotates eccentrically, and rotates the external teeth 14 that mesh with it one tooth per rotation of the first swing plate 8,
The rotating end 15 of the first rotating plate tray can be rotated around the first rotating shaft 6, and when the second knob 34 is rotated, the square shaft portion 35, the second rotating shaft 19, and the second cam are rotated. The through hole 24 into which the second cam part 21 is fitted is oscillated through the part 21, and the second oscillating plate η is oscillated in the same manner as the first oscillating plate 8.
Therefore, the external teeth n, which are partially meshed with the internal teeth δ of the second oscillating plate η, are moved by -teeth for each revolution of the second oscillating plate 22, so that the second rotating plate 23 is rotated. The end 29 can be moved in the same way, and although it is a gear type, the stepless adjustment device has the advantage of having a simple structure.

[Brief explanation of the drawing]

FIG. 1 is a longitudinal sectional view, and FIG. 2 is an exploded view. Explanation of symbols 1... Mounting bracket, 2... Shaft hole, 3... City shaft, 4...
...Insertion hole, 5...Threaded part, 6...First rotating shaft, 7
... first cam part, 8 ... first swing plate, 9 ... first through hole, lO ... internal tooth, 11 ... long hole, 12 ... first rotation plate , 13... Shaft hole, 14... External tooth, 1
5... Rotating end, 16... Partition plate, 17... Through hole, 1
8... Through hole, 19... Second rotating shaft, 20... Small diameter part, 21... Second cam part, η... Second rocking plate, n.
...Second rotating plate, 24...Through hole, 25...Internal tooth, 26...Long hole, 27...External tooth, 28...Through hole, 29...Tip part, (9)...fixing plate, 31
...Threaded hole, 32...Threaded hole, wing...Threaded part, 34.
...Second knob, A...Square shaft part, A...Through hole, G.
...Square shaft part, 38...First knob, 39...Fixing screw.

Claims (1)

[Claims] The first cam portion 7 of the first rotating shaft 6 and the second cam portion 24 of the second rotating shaft 19 are formed coaxially, and the first cam portion 7 has a first through hole of the first swing plate 8. 9 and the first rocking plate 8
is provided with internal teeth 10 centered on the first through hole 9, and when the first cam portion 7 rotates within the first through hole 9, the internal teeth 10 swing eccentrically. is fitted with the external teeth 14 of the first rotation plate 12, and the external teeth 14 are fitted with the internal teeth 1.
A second oscillating plate 22 having a number of teeth approximately 1 to 2 fewer than 0 and formed in the same manner as the first oscillating plate 8 on the second cam portion 24 with a partition plate 16 in between; Single rotation plate 1
This is an adjustment mechanism for vertically adjusting the seat, etc., in which a second rotating plate 23 formed similarly to 2 is fitted, and the first rotating shaft 6 and the second rotating shaft 19 are rotated separately.