JPS62129962U - - Google Patents

Description

[Brief explanation of the drawing]

FIG. 1 is a perspective view of Haiti Air to which an embodiment of this invention is applied. FIG. 2 is a perspective view of the backrest member 13 shown in FIG. FIG. 3 is a perspective view of the support member 15 shown in FIG. 4A is a bottom view of the embedded member 36 shown in FIG. 3, FIG. 4B is a front view thereof, and FIG. 4C is a cross-sectional view taken along line CC in FIG. 4A. It is. FIG. 5 is a front view of the lock pin 37. 6A is a plan view of the lock guide member 39 shown in FIG. 3, FIG. 6B is a left side view thereof, FIG. 6C is a bottom view, FIG. 6D is a front view, and FIG. 6E is a top view of the lock guide member 39 shown in FIG. 6A is a cross-sectional view taken along line EE of FIG. 6A; FIG. 7A is a front sectional view of the knob 40 shown in FIG. 3, and FIG. 7B is a bottom view thereof. 8A is a plan view of the lever 74 shown in FIG. 3, FIG. 8B is a front sectional view thereof, and FIG. 8C is a bottom view thereof. FIG. 9 is a diagram showing another example of a rotation inhibiting means for inhibiting rotation of the knob 40. Figure 10 shows Jitsugan 1986-1.
11291 is a cross-sectional view of the Haiti Air seat height adjustment mechanism disclosed in No. 11291, viewed from above. FIG. 11 is a perspective view of the lock guide member 6 shown in FIG. 10. FIG. 12 is a sectional view showing the state after the knob 10 is rotated from the state shown in FIG. 10. In the figure, 13 is a backrest member constituting a part of the seat, 15 is a support member, 31 is a long member,
33 is an engagement hole, 34 is a guide groove, 35 is a through hole, 3
7 is a lock pin, 38 is a spring, 39 is a lock guide member, 40 is a knob, 52, 53, 54, 55
indicates an inclined surface, and 56, 57, 58, and 59 indicate notched grooves. Note that the same reference numerals in each figure indicate the same or equivalent elements.

Claims (1)

[Claims for Utility Model Registration] (1) A seat, and a supporting member arranged to overlap with the seat and supporting the seat in a vertically slidable manner, the supporting member comprising: A through hole is provided, and a plurality of engagement holes arranged in a vertical direction are provided on the seat portion at a position facing the through hole, and the seat portion is provided so as to be slidable within the through hole. a lock pin that fixes the height of the seat portion when the top portion thereof is positioned astride the through hole and the engagement hole; and the lock pin moves within the through hole toward the engagement hole. a spring biased so as to
When the knob to be rotated and the tip of the lock pin are located in the engagement hole, if the knob is rotated without moving in the axial direction of the lock pin, it will engage with the knob and stop its rotation. further comprising: a rotation inhibiting means that prevents rotation of the knob, but allows rotation of the knob when the knob is moved in the axial direction of the lock pin and rotated; A protruding protrusion is provided on the support member, and the protrusion has a height along a direction parallel to the axis of the lock pin on a circular trajectory drawn by the protrusion when the knob is rotated. A gradually changing slope is formed, so that when the knob is rotated, the protrusion moves on the slope, and the locking pin moves in its axial direction accordingly to close the engagement hole. Seat height adjustment mechanism that disengages the seat. (2) The seat height adjustment mechanism according to claim 1, wherein the rotation inhibiting means is a notched groove formed in a valley of the inclined surface and fitted with the protrusion. .