JP3375266B2 - Armrest 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 pad device attached to an armrest of a single chair or a connecting chair.

[0002]

The present applicant has proposed a memo pad device for a row of consecutive chairs installed in a hall (Japanese Patent Application No. 7-300629). The present invention provides a memo pad device which is lighter in weight than the proposed memo pad device, can be easily manufactured without using special parts, and has stable operation.

[0003]

When the memo pad device of the present invention is fixed to the armrest, a case body fixed to the inner surface of the armrest portion and a case body pivotally attached to the case body, the armrest portion. The case body is substantially rectangular and has a projecting boss portion surrounding the central hole and a detent dovetail-shaped projection portion connected to the boss portion. A rotation guide groove penetrating in a semi-circular shape around the center hole on the side facing the protrusion and a pair of a pair of protrusions on the upper end side of the rotation guide groove with the center protrusion interposed therebetween. A step portion is formed, and the rotating frame has a substantially semi-arcuate concave portion for accommodating the boss portion and the dovetail-shaped protruding portion of the case body, and the protruding portion is provided at the center thereof and inserted into the center hole of the case body. It has a shaft part and a projecting pin that is fitted into the rotation guide groove of the case body, and the memo pad support plate is connected to the pin. The two bosses and the intermediate recesses of the two bosses are provided so as to be retractable and retractable, and when the memo pad receiving plate falls down, it is pressed by the thick portion of the boss portion of the base plate and descends so as to move between the pair of case bodies. The projection pin is provided with a two-pronged stopper that engages with the stepped portion, and the tip end of the projecting pin is biased by a tension spring whose base end is fixed to the back surface of the other side of the case body. Further, in the case of the automatic retractable type in the armrest accommodation chamber, the above-mentioned memo base device is attached to the slide substrate tip side which is slidable with respect to the guide base plate fixed to one inner wall of the interior space, and A lever having a guide pin protruding from the rear end is pivotally mounted, and a pin link is provided between the intermediate portion of the lever and the outer peripheral portion of the rotating frame of the memo pad device to connect the guide pin of the lever. It is configured by being fitted into a linear slide groove of a guide body fixed to the other inner wall surface of the room. In the above case, the lever is preferably provided with a pull-back spring for facilitating the automatic pulling of the slide substrate.

[0004]

DESCRIPTION OF THE PREFERRED EMBODIMENTS In FIG. 1, reference numeral 1 is an armrest of a chair, and 2 is a memo pad, which is attached to the inner surface of the armrest or is retractable and accommodated in a storage chamber. A memo pad device 10 of the present invention is composed of a case body 11 made of an aluminum alloy, a memo pad rotating frame 12 and a memo pad support plate 13. As shown in FIGS. 2 and 3, the case body 11 is substantially rectangular and has a boss portion 21 that surrounds the central hole 20 on one surface side and a dovetail-shaped protrusion 22 for preventing rotation from being provided on a part of the outer periphery thereof.
And a pair of left and right notch steps 2 on the upper part of the boss.
3 is formed. 24 is a central protrusion. 25 is
This is a semicircular arc-shaped rotation guide groove formed on the side opposite to the dovetail projection 22. As shown in FIG. 4, the memo pad rotating frame 12 is provided with a substantially U-shaped concave portion 30 and a cushion-like stopper 31 at the upper end thereof that collides with the side surface of the dovetail-shaped protrusion, and at the center thereof, a central hole of the case body boss portion. A shaft portion 32 to be inserted into 20 is provided in a protruding manner. 32a is a mounting screw. The reference numeral 33 designates a pin projecting to the upper back surface of the shaft portion, which is a rotation guide groove 25 of the case body.
Is fitted inside. 34 and 35 are formed on the upper surface of the frame 2
The continuous boss portion 36 is an intermediate concave portion, and a hole 37 into which a two-pronged stopper 38 is fitted is formed in the bottom surface portion thereof. 39
Is a compression spring for retracting the stopper. Protruding pin 33
Is fitted in the turning groove 25 of the case body, and the tip end 27 of the tension spring 26 is screwed 33a to the tip thereof, and the base end 28 of the spring is located on the back surface of the case, for example, at the position of the base end 28 in FIG. 8B. It is fixed directly. As a result, a tension spring force always acts on the projecting pin 33, and thus on the rotating frame 12. Memo pad 1
3 is an intermediate boss portion 4 of a triple boss portion 40 provided on the base end side.
1 is located in the intermediate recessed portion 36 of the rotating frame and is hingedly connected by the pin shaft 42, and the intermediate boss portion 41 has a two-pronged stopper 38.
Touches the upper surface of. FIG. 6 is a sectional view when the memo pad is in use. The bifurcated stopper 38 is pressed against the thick portion of the intermediate boss portion 41 of the memo pad receiving plate so that the bifurcated tip of the bifurcated stopper 38 is shown in FIG.
As described above, it engages with the notch steps 23, 23 so as to sandwich the central protrusion 24 of the case body boss, and resists an external force in the axial direction. When the memo pad is erected upright, the intermediate boss portion 41 which is in contact with the two-pronged stopper 38 becomes the thin portion side as shown in FIG. 7, so that the two-pronged stopper 38 rises and the engagement with the notch step portion 23 is cut off. Since the rotating frame 12 is rotatable with respect to the case body 11, if the memo pad is slightly pushed forward, the memo frame is brought into a hanging state as shown in FIG. Is retained. To put the memo pad 13 into the used state, manually move it from the state shown in FIG.
Needless to say, the operation is performed as in (a), but after the state in (b) is passed, the spring force acts on the side of raising the memo pad so that the resistance is reduced. The center of gravity of the memo pad is usually located in front of the shaft portion 32, and the upright memo pad is urged to rotate forward. The movement can be facilitated. That is, the base end 28 of the tension spring 26 is not fixed to the back surface of the case, but is connected to the rotating lever 29 pivotally mounted on the back surface of the case as shown in the figure. As a result, a tension spring force acts on the projecting pin 33 of the rotating frame 12 in the suspended state (FIG. 8C) and the intermediate state (FIG. 8B) of the memo pad, but as shown in FIG. When is upright, the spring force is not applied and the memo pad is free to rotate in the arrow direction. Reference numeral 29a is a stopper screw for adjusting the free rotation range. Further, when the memo pad is in use, that is, when the memo pad is in a fall position, the memo pad and the rotary frame 12 and the case body 11 are firmly integrated by a bifurcated stopper 38 as shown in FIG. However, in the upright state and the stored state, the rotating frame 12 and the memo pad 13 are only hinged and unstable. In order to solve this, a slope 44 is formed on the two continuous bosses 34 and 35 of the rotating frame, and a pressing plate 46, which is constantly urged by a pressing spring 45, is housed inside the memo pad so that it can be retracted. The slope 47 provided at the tip portion is brought into face-to-face contact with the slope 44 of the boss portion. As a result, in the upright state of the memo pad, both slopes 47 and 44 are in pressure contact with each other as shown in FIG. 7, so that the tip of the pressing plate is always in the double boss portion even when the memo pad is laid down as shown in FIG. Since it is in contact with the outside, it is more stable.

FIG. 9 is an exploded perspective view of the automatic retracting mechanism, in which 3 is a storage chamber directly below the armrest, 4 is one inner wall, and 5 is the other inner wall. Reference numeral 50 is a guide base plate horizontally fixed to the inner wall 4, 51 is a liner made of synthetic resin, 52 is a rear end bracket, and a stopper 53 and one end of a tension spring 54 are locked. Reference numeral 55 denotes a slide substrate that is slidably installed on the guide base plate, and the device 10 of the present invention is fixed to the tip side of the slide substrate. A lever 56 is pivotally mounted 57 on the rear end side of the slide substrate.
At the same time, the other end of the spring 54 is locked. A guide pin 58 is provided on the tip of the lever. One end of a rod link 60 is pivotally attached 61 to the approximately middle portion of the lever, and the other end 62 of the rod is pivotally attached 64 to a connecting portion provided on the outer peripheral surface of the rotating frame 12. Reference numeral 65 denotes a guide body of a guide pin, which is fixed to the other inner wall 5 and has a linear slide groove 66 formed therein, and a guide pin 58 of a lever or a roller 59 is fitted in the groove. Figure 10
FIG. 11 is a plan view of the above-described automatic retracting mechanism in an assembled state, which operates as shown in FIGS. 11 (a), 11 (b), and 11 (c). That is, when the memo pad 2 is erected and the stopper is released from the boss portion as shown in FIG. 4A, the memo pad 2 is rotated forward by its own weight and the slide substrate 5 is pulled by the pulling force of the spring 54.
5 retreats. The tip guide pin 58 of the lever moves in the slide groove 66 as the rotating frame rotates and the slide substrate retracts, and the lever is moved to the state shown in (b). To be done. The drawer of the memo pad is performed by the opposite operation to the above.

[0006]

[Effect] In Japanese Patent Application No. 7-300629, which is the conventional technique, the projecting pin of the rotating frame is connected to the torsion coil spring through the link, so that the assembly work is troublesome and the operation is relatively unstable. Although the upper rotation stopper has only one pin, the force of regulating the memo pad is weak, but the device of the present invention does not use the screw coil spring and directly connects the tension spring to the projecting pin, so that the device cannot be incorporated. Easy and stable operation. Further, since the memo pad is firmly held by the two-pronged stopper, it is stable without swinging during use. Further, since the automatic pull-in mechanism has a simple link structure and no special parts are used, it can be manufactured at a light weight and a low price.

[Brief description of drawings]

FIG. 1 is a plan view of a connecting chair equipped with an armrest memo table.

FIG. 2 is a front view of a case body.

FIG. 3 is a top view of a case body.

FIG. 4 is an exploded perspective view of main parts as seen from the back side of the case body.

FIG. 5 is a partially enlarged sectional view in which a two-pronged stopper is pushed in.

FIG. 6 is a side view of the central longitudinal section of the boss portion when the memo pad is used.

FIG. 7 is a vertical sectional side view of the center of the boss when the memo pad is upright.

FIG. 8 is an explanatory view showing a rotating process of the memo pad.

FIG. 9 is an exploded perspective view of an automatic retracting mechanism.

FIG. 10 is a plan view of a main part in a stored state.

FIG. 11 is an explanatory view showing a rotation accommodating process of the memo pad device.

[Explanation of symbols]

11 case body 12 Rotating frame 13 Memo stand support plate 20 center hole 21 Boss 22 Pigeon tail projection 23 Notch step 24 Central protrusion 25 Rotation guide groove 26 Tension spring 29 Rotating lever 30 recess 32 shaft 33 protruding pin 34,35 Double boss 36 Intermediate recess 37 Stopper hole 38 Two-pronged stopper 39 spring 41 Intermediate boss 44,47 slope 50 guide board 55 Slide board 56 lever 58 Guide pin 60 rod link 65 pin guide 66 slide groove

Claims (4)

(57) [Claims] 1. A memo pad comprising a case body fixed to the inside of an armrest portion of a chair, and a memo pad rotation frame pivotably attached to the case body and pivotable in parallel with the armrest portion. In the device, the case body has a substantially rectangular shape, and a projecting boss portion surrounding the central hole on one surface of the case body, a detent protrusion projecting from the boss portion, and a semicircle centered on the central hole on the side facing the projecting portion. An arc-shaped rotation guide groove and a pair of steps are formed on the protruding boss surface on the upper end side of the rotation guide groove with a central protrusion interposed therebetween, and the rotation frame is the case body. Substantially U-shaped recess for accommodating the boss portion and the detent protrusion, a shaft portion projecting at the center thereof and inserted into the center hole of the case body, and fitted into a rotation guide groove of the case body. It is equipped with a projecting pin, and it appears and disappears in a double boss portion that connects the memo base plate with the pin and an intermediate concave portion of the double boss portion. The tip of the projecting pin is provided at the present position, and is provided with a two-pronged stopper that is pressed down by the thick portion of the boss portion of the base plate when the memo pad support plate falls down and descends to engage with a pair of stepped portions of the case body. Is a biasing device which is urged by a tension spring having a base end fixed to the back surface of the other side of the case body. 2. A memo pad device is attached to a slide board tip end side which is slidable with respect to a guide base plate fixed to one inner wall of a storage chamber provided in an armrest portion of a chair, and at the rear of the slide base plate. A lever having a guide pin projecting from the tip is pivotally attached, and a rod link is provided between the intermediate portion of the lever and the outer peripheral portion of the rotating frame of the memo pad device to connect the guide pin of the lever to the inside of the chamber. It is configured by being fitted into the linear slide groove of the guide body fixed to the other inner wall surface,
The memo pad device comprises a case body and a memo pad pivoting frame pivotably attached to the case body. The case body is substantially rectangular and has a protruding boss portion surrounding a central hole on one surface thereof. A rotation stop projection connected to the boss portion, a rotation guide groove penetrating in a semi-circular shape around the center hole on the side facing the projection, and the protrusion boss on the upper end side of the rotation guide groove. A pair of steps is formed on the surface of the case with a central projection interposed therebetween, and the rotating frame is provided with a substantially U-shaped recess for accommodating the boss of the case body and the rotation-stopping projection and projecting at the center thereof. And a two boss portion that includes a shaft portion that is inserted into the center hole of the case body, and a projecting pin that is fitted into a rotation guide groove of the case body and that connects the memo base plate with a pin. It is provided so as to be retractable in the middle concave portion of the base plate, and is pressed against the thick portion of the boss portion of the base plate when the memo base plate is collapsed. A memo pad device including a fork that engages with a pair of steps of the case body, and the tip of the projecting pin is biased by a tension spring having a base end fixed to the back surface of the other side of the case body. . 3. The memo pad device according to claim 1, wherein a base end of the tension spring is connected to a rotating lever pivotally mounted on the back surface of the case body. 4. A slope 44 is formed on the two continuous boss portions, and a spring-biased pressing plate is provided inside the memo pad receiving plate, and a slope 47 provided at the tip of the pressing plate is used when the memo pad is upright. An apparatus according to any one of claims 1 to 3, which is configured so as to be in face-to-face contact with the slope 44.