JP3258230B2 - Armrest storage memo table device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a memo table device for an armchair.

[0002]

A method of storing a memo table in an armrest and pulling up or storing the memo table from an opening on the front side is as follows.
Since the memo pad passes through a part of the front passage, smooth operation is required, and particularly, the storage operation must be secure. SUMMARY OF THE INVENTION The present invention provides an economical memorandum device that can automatically and securely store a relatively small and lightweight memorandum using its own weight.

[0003]

According to the present invention, a tension spring is provided in a memo table accommodating chamber provided in an armrest of a chair and provided with a front opening, and a pair of leg pieces is provided at an upper portion on the opening side of the accommodating chamber. A two-way holding body having a keyhole-shaped circular through groove and a squeezing portion formed therein is fixedly provided, and has a base having an oval cross section that passes through the squeezing portion and engages with the circular groove. A rotating shaft that rotates integrally with the memo table, a pair of parallel brackets are provided at the base end while supporting the rotating shaft along a long side, and a trunnion is provided on each bracket outer surface. A pivot arm is provided which is protruded and fitted into a shaft hole formed in both leg pieces of the holding body, and the tension of the tension spring is constantly urged via a wire to a pin fixed between the brackets. It is configured as follows. With this configuration, the tension of the tension spring acting on the rotating arm acts on the storage side when the memo table pivotally supported by the rotating arm is in the stored state, and when the memo table is in the upright state or in the used state, the tension is applied to the storage side. Acts to maintain. Furthermore, when the memo table is rotated downward from its upright state by its own weight, it acts to resist the rotation, so that a gentle operation is realized and safety is achieved. Further, a leaf spring is bent upright in a recess provided on a long side portion of the rotating arm, and an upper end of the leaf spring is engaged with an engaging recess recessed on a side surface of the memo table rotating shaft. The position of the memo table relative to the rotating arm is regulated, and the memo table is raised and automatically lowered.

[0004]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS In FIG. 1, 1 is an armrest chair, 2 is a backrest, 3 is an armrest, 4 is a seat, and 5 is a front opening memo table storage room provided in the armrest portion. As shown in FIG. 2 and subsequent figures, the memo table storage chamber 5 stores the entire memo table, is provided with a front opening 6, an aluminum die-casting 2 holding member 7 and a wire guide roller 8 in the upper part of the room, and a tension spring 10 below. Is fixed. The tension spring 10 may be provided in parallel with the armrest. 9
Is a wire, 8a is an intermediate roller, and 10a is a rubber stopper. The bifurcated holding body 7 has a pair of leg pieces 11 and 12 and a keyhole-shaped circular through groove 13 formed in the bridging portion to form a bifurcated block body, and is fixed to the upper portion on the entrance side of the storage chamber. . 14 is a pinching part, 15 is a guide taper part of the inner wall of the leg piece, 1
6 is a shaft hole, 17 is a connection part. Reference numeral 20 denotes a memo table turning arm, and a base 21 is provided with a parallel plate bracket 22. Reference numeral 23 denotes a space, and 24 denotes a trunnion protruding from the outer surface of the bracket, which is fitted into the shaft hole 16 via a bush 25. Reference numeral 26 denotes a wire connecting pin or hook fixed between a pair of brackets, to which the tip of the wire 9 is connected, and to which a tensile force is constantly applied. The exposed portion on the distal end side of the rotating arm 20 is covered with a boat-bottomed plastic cover 29 formed by blow molding or the like to prevent a finger from being pinched. A memo table rotating shaft 31 is pivotally supported by a bearing member 32 on the rotating arm in parallel with the long side portion 28, and the memo table 30 rotates and falls down integrally with the rotating shaft 31. The base end 33 of the rotation shaft is formed in an oval cross section, and the flat portion 34 facing the
Can pass through the squeezing portion 14 of the holding body 7. 35 is an arc part. Note that a known lock mechanism or click mechanism may be provided between the rotation arm 20 and the memo table rotation shaft 31 in order to prevent the memo table from unnecessarily swinging in the falling direction. FIGS. 9 to 11 show a positioning lock mechanism for ensuring the lifting operation of the memo table.
A leaf spring 41 erected inside and a presser 42 at the tip are provided, and the presser is engaged with an engagement recess 43 recessed on the side surface of the rotating shaft to maintain the horizontal state and the vertical state.

[0005]

When the memo table is in the state shown in FIG. 2, the tension force of the spring 10 acts to pull the memo table 30 into the storage chamber via the rotating arm 20, and the stored state is maintained. When the memo table is pulled out against the turning force and the wire 9 exceeds the trunnion 24 as shown in FIG. 3, the spring force acts as a turning force in a direction for erecting the rotating arm and the memo table. In this rotation process, the flat portion 34 of the base 33 of the memorandum turning shaft 31 is guided by the tapered portion 15 of the holding member 7 to pass through the squeezing portion 14, and when the memotable is in the upright state in FIG. As shown in FIG.
Fit inside. In this state, when the memo table is turned down horizontally, the arc portion 35 of the rotation shaft base comes into contact with the left and right arc surfaces of the circular groove 13 as shown in FIG. Supported by When the memo table is in a horizontal state, it may be supported by a receiving member (not shown) or the like. When the user leaves the seat or jumps up the memo table during an emergency evacuation, the memo table 30 is brought into the vertical state in FIG. 4 and at the same time the base 33 of the rotating shaft is in the state shown in FIG. After being lowered and rotated together with the moving arm 20, it is stored as shown in FIG. 2 through the state of FIG. During this time, the tension of the tension spring 10 initially acts to resist the downward rotation,
When it exceeds the trunnion 24, it works in the retraction direction.

[0006]

According to the present invention, the base of the memo table turning arm is pivotally connected to the holding member by a trunnion protruding from the outer surface of the parallel bracket. By applying a spring force to the rotating arm via a wire, it acts on the storage side and the upright side, so that stable operation can be expected with a simple structure. Also, when the memo table is in the horizontal state, it is held by the holding mechanism by the rotating shaft base and the circular groove, and when the memo table is lowered from the upright state at the start of the storing operation, the spring force is applied in the retraction direction. The memo stand is safe without dropping suddenly.

[Brief description of the drawings]

FIG. 1 is a front view of a chair provided with an armrest storage memo stand.

FIG. 2 is a side view showing the inside of the storage chamber in a memo table storage state.

FIG. 3 is a side view in which the memo table is rotating.

FIG. 4 is a partially longitudinal side view of the memo stand in an upright state.

FIG. 5 is a cross-sectional plan view of the memo table turning pivot.

FIG. 6 is a vertical sectional front view of the memo table holding mechanism in a stored state.

FIG. 7 is a vertical sectional front view of the memo table holding mechanism in the state of FIG. 4;

8 is a vertical sectional front view of the memo table holding mechanism when the memo table is laid down in the state of FIG. 4;

FIG. 9 is a vertical cross-sectional view of a memo table falling / rotating lock mechanism.

FIG. 10 is a vertical cross-sectional view of a tumbling lock mechanism of the memo table;

FIG. 11 is a vertical cross-sectional view of a memo table falling / rotating lock mechanism.

[Explanation of symbols]

 5 Storage Room 6 Front Opening 7 Two-Pinch Body 8 Wire Roller 9 Wire 10 Tension Spring 11,12 Leg Piece 13 Circular Groove 14 Nipping Part 15 Tapered Part 16 Shaft Hole 20 Rotating Arm 21 Base End 22 Parallel Bracket 23 Space Reference Signs List 24 trunnion 26 pin 28 long side 29 cover 30 memo table 31 rotating shaft 32 bearing member 33 oval base section 34 flat part 35 arc part 41 leaf spring 42 presser

Continuation of the front page (58) Field surveyed (Int.Cl. ⁷ , DB name) A47C 7/70

Claims (2)

(57) [Claims] A tension spring is provided in a memo table accommodating chamber provided in an armrest of a chair and having a front opening, and a pair of leg pieces is provided at an upper portion on an opening side of the accommodating chamber. A forked body having a through groove and a squeezing portion is fixedly provided,
A rotating shaft that passes through the squeezing portion and has an oval cross section that engages with the circular groove and that rotates integrally with the memo table; and that the rotating shaft is axially supported along a long side portion. A pair of parallel brackets are continuously provided at the base end, and a trunnion is protruded from the outer surface of each of the brackets, and a turning arm fitted to a shaft hole formed in both leg pieces of the holding body, A memo table device in which the tension of the tension spring is constantly urged via a wire to a pin fixed between brackets. 2. A leaf spring is erected upright in a recess provided on a long side portion of a rotating arm, and an upper end of the leaf spring is engaged with an engaging recess provided on a side surface of the memo table rotating shaft. 2. The memo table device according to claim 1, further comprising a memo table lock mechanism.