JPH0139478Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to an armrest device provided in a vehicle seat.

[Conventional technology]

2. Description of the Related Art Seats on buses and the like are usually equipped with armrests that support the arms of the occupants in order to maintain a comfortable posture.

Since this type of conventional armrest was fixed to the side of the seat back, it tilted together with the seat back when the seat back reclined, making it impossible to comfortably support the arms of the seated person.

For this reason, in recent years, seatbacks have been proposed in which the armrest is rotated in conjunction with the backward tilting movement of the seatback. That is, this armrest is connected to the seat back via a parallel link mechanism, and as the parallel link mechanism is operated by tilting the seat back backward, the arm rest is moved while always maintaining a parallel or horizontal state to the floor surface, thereby supporting the seated person. The arms of the robot are always supported in a constant state.

[Problem that the invention attempts to solve]

However, since this armrest device uses a link mechanism, it has a complex configuration and a large number of parts.Also, since the armrest is connected to a parallel link mechanism, it is not possible to adjust the angle of the armrest alone. This has the disadvantage that it is not possible to set the support angle according to one's preference.

The present invention has been made in view of these points, and an object of the present invention is to provide an armrest device that has a simple configuration and allows the support angle to be freely adjusted.

[Means for Solving the Problems] In order to achieve the above-mentioned object, the present invention has a structure in which the armrest main body 5 is pivotally supported on a shaft 8 protruding from the side of the seat bag 3 so as to be rotatable in the vertical direction. An operating shaft 14 is provided in the armrest main body 5 in its longitudinal direction.
A threaded portion 13 is formed on one end of the operating shaft 14 to be threaded into a nut 13 fixed to the armrest main body 5, and the other end of the operating shaft 14 is provided with a predetermined thread. It has a non-circular cross section, for example, a square cross section over its length, and has a square hole 16 at a predetermined position of the armrest body 5 as an opening complementary to the square cross section of the other end side of the actuating shaft 14. An operating handle 15 that is loosely engaged with the operating shaft 14 is rotatably supported, and an abutting protrusion 17 is formed near the shaft 8 on the side of the seat bag, with which the end of the operating shaft 8 comes into contact. It is something that has been done.

[Effect]

The means described above operate as follows.

When the operating handle 15 is rotated in one direction, the operating shaft 14 is rotated together with the operating handle 15, whereby the operating shaft 14 is rotated forward by the screw mechanism, that is, the abutting protrusion 1.
7, and along with this, the armrest main body 5 is rotated downward about the shaft 8 by its own weight or by the force applied from the arm of the seated person.

Furthermore, when the operating handle 15 is rotated in the opposite direction, the operating shaft 14 is moved rearward and its rear end presses against the abutment protrusion 17, so that the armrest main body 5 is pushed upward about the shaft 8. It will be rotated so that it can be rotated.

By rotating the operating handle 15 in this way to change the amount of protrusion of the operating shaft 14 and rotating the armrest body 5 in the vertical direction, the support angle of the armrest body 5 can be adjusted even when the seat back 3 is reclined. It can always be set to the optimum state, for example, a nearly horizontal state, and the seat back can be set to 3
Even when the armrest main body 5 is fixed, the support angle of the armrest main body 5 can be adjusted to suit the body shape or preference of the seated person.

〔Example〕

Hereinafter, one embodiment of the present invention will be described with reference to FIGS. 1 to 5.

In the figure, 1 indicates a vehicle seat, for example, a bus seat, 2 a seat cushion, 3 a seat back, and the seat cushion 2 and the seat back 3 are connected via a reclining device 4.
An armrest main body 5 is attached to one side of the seat bag 3, that is, the side on the aisle side.

This armrest main body 5 has a shaft hole 6a formed in the rear part of a frame 6 disposed inside the armrest main body 5, which is fitted into a shaft hole 6a formed in the rear part of a frame 6 disposed inside the armrest main body 5. It is pivotably supported on the seat bag 3 so as to be rotatable in the vertical direction.

An adjustment operation mechanism 10 for adjusting the support angle is disposed inside the armrest main body 5.

This adjustment operation mechanism 10 is constructed as follows.

A pair of front and rear L-shaped brackets 11a and 11b are fixed to the front part of the frame 6, facing each other at a required interval, and a similar L-shaped bracket 12 is fixed to the rear part of the frame 6. A through hole is formed in each of the vertical surfaces of the front and rear brackets 11a, 11b and 12, and a nut 13 is fixed to the rear bracket 12 in communication with the through hole.

The actuating shaft 14 is attached to the female threaded portion 13a of this nut 13, and the male threaded portion 1 formed at the rear end thereof is
4a, and an operating handle 15 is attached to the front of the operating shaft 14 so as to be engaged in the circumferential direction and loosely engaged in the axial direction.

That is, the front half of the operating shaft 14 has a non-circular cross-section, for example, a square cross-section, and corresponding to this cross-sectional shape, the operating handle 15 has a rectangular hole 16 in the center that is complementary to the square cross-section. This operating handle 15 is attached to the front bracket 1.
An operating shaft 14 is pivotally supported between the vertical surfaces of the brackets 1a and 11b, with the square hole 16 communicating with the through holes of the brackets 11a and 11b. The non-circular cross-sectional shape of the connecting portion between the operating shaft 14 and the operating handle 15 may be various polygonal shapes, star-shaped shapes, etc. in addition to the square shape shown in this example.

Further, the adjustment operation mechanism 1 configured as described above
Corresponding to the operating shaft 14 of the seat bag 3, an abutment protrusion 17 is provided upright in the vicinity of the shaft 8 on the bracket 7, which is fixed to the shaft support of the armrest main body 5 of the seat back 3, that is, the back frame 3a. The rear end of the actuating shaft 14 is brought into contact with the abutment protrusion 17, whereby the armrest main body 5 is held at its supporting angle, that is, in a substantially horizontal state in FIG.

In addition, within the armrest main body 5, a core material 18 such as wood is fixed to the frame 6 so as not to come into contact with the movable member of the adjustment operation mechanism 10.
8 and around the frame 6 as usual pad 19
is surrounded by a skin 20, and its surface is further covered with an epidermis 20.

The side surface of the armrest body 1 is covered with a skin 2.
A through hole 21 is formed in 0, and a portion of the operating handle 15 protrudes from this through hole 21.

Next, the operation of the armrest of this example configured as described above will be explained.

Now, when the seat back 3 is in the neutral position, the armrest main body 5 is in a substantially horizontal state (see FIG. 1).

If the seat back 3 is tilted backwards from this state, the armrest body 5 will be in a state facing diagonally upward, so the armrest body 5 can be adjusted by operating the operating handle 15 to vary the amount of protrusion of the operating shaft 14. Adjust the angle so that it is approximately horizontal. That is, when the operating handle 15 is rotated in one direction, the operating shaft 14 is rotated together with the operating handle 15.
This rotation causes the actuating shaft 14 to rotate through its male threaded portion 14.
a is screwed back into the internally threaded portion 13a of the nut 13, thereby moving forward, that is, in a direction away from the abutment protrusion 17, and as a result, the armrest main body 5 absorbs its own weight or the load applied from the arm of the seated person. The armrest main body 5 is rotated so as to be pushed downward about the shaft 8, and by stopping the operation of the operating handle 15 in a substantially horizontal state, the armrest main body 5 is locked and held in that position. (5th
(see figure).

Also, if the seat back 3 is returned to the neutral position from this state, the operating handle 15
By rotating in the opposite direction to the above, the actuating shaft 14 is moved rearward and its rear end touches the abutting protrusion 17.
The armrest main body 5 is rotated so as to be pushed upward, and is set in a substantially horizontal position as shown in FIG.

As described above, according to the armrest device of this example,
The operation handle 15 changes depending on the tilting of the seat back 3.
By rotating the armrest main body 5, the armrest main body 5 can always be set and held at a constant support angle.

Furthermore, even when the seat back 3 is fixed, by rotating the operating handle 15 and vertically rotating the armrest body 5, it is possible to set the support angle according to the body shape or preference of the seated person. can.

Furthermore, in the armrest device of this example, the operating handle 15 and the operating shaft 14 are engaged in the circumferential direction and are slidable in the axial direction.
Although the operating shaft 14 is moved in the axial direction by the rotation of the operating handle 15, the position of the operating handle 15 is always constant.
Since only a portion of the armrest body 5 is exposed, the overall appearance of the armrest body 5 is improved, and by arranging the operating section at the front of the armrest body 5 as in this example, the seated person can easily see the armrest body 5. Adjustments can be easily made with the tip of the thumb of the hand on which it is placed.

Furthermore, the armrest device of this example has an operating shaft 14.
Since the rear end is only in contact with the abutting protrusion 17 and is not connected, the armrest main body 5 can freely rotate upward, so that it can bounce upward when the armrest is not needed or when getting on and off. You can also raise it.

FIG. 6 shows another embodiment of the operating section, in which a recess 22 is formed in the side surface of the armrest main body 5, a through hole 21' is formed at the bottom of this recess 22, and the operation handle is inserted through the through hole 21'. A portion of the number 15 is exposed. With this configuration, the operating handle 15 does not protrude from the side surface of the armrest main body 5, so that the appearance can be further improved.

[Effect of idea]

As described above, according to the armrest device of the present invention, the rotation of the armrest body can be adjusted by simply rotating the operating handle.
By operating the operating handle in accordance with the reclining movement of the seatback, the support angle of the armrest body can always be set to the optimal state, and even when the seatback is fixed, it can be adjusted to suit the body shape and preferences of the occupant. The support angle can be adjusted to provide a comfortable sitting posture for the seated person. In addition, this armrest device is configured to adjust the rotation of the armrest body by rotating the operating handle and moving the operating shaft forward and backward using a screw mechanism, so even if a large load is applied to the armrest body, the operating shaft will not move. It does not move, therefore, the armrest body is reliably held at a predetermined angle without turning in any direction, and even if a seated person accidentally touches the operating handle while using the armrest and the operating handle is rotated slightly. , the armrest body hardly changes even if the operating axis is slightly rotated. Furthermore, the armrest device of the present invention is
Since a simple screw mechanism is used as the adjustment operation mechanism, the configuration is simple and the number of parts is small, which has great practical effects such as cost and weight reduction.

[Brief explanation of drawings]

Fig. 1 is a partially cutaway side view of the armrest device of the present invention, Fig. 2 is a perspective view of a seat equipped with the armrest device of the present invention, and Fig. 3 is an exploded view of the adjustment operation mechanism of the armrest device of the present invention. Perspective view, 4th
The figures are a sectional view taken along the line A-A' in FIG. 2, FIG. 5 is an explanatory view of the operation of the armrest device of the present invention, and FIG. 6 is a sectional view showing another embodiment of the operating section. In the figure, 3 is the seat back, 5 is the armrest body, 8 is the shaft, 13 is the nut, 14 is the operating shaft, 14
15 is an operating handle, and 17 is an abutting projection as an abutting portion.

Claims (1)

[Scope of Claim for Utility Model Registration] An armrest main body is rotatably supported in the vertical direction on a shaft protruding from the side of the seat bag, and an operating shaft is disposed within the armrest main body in its longitudinal direction, A threaded portion is formed on one end of the actuating shaft to be threaded through a nut fixed to the armrest body, and a non-circular cross-sectional portion is formed over a predetermined length on the other end. An operating handle is rotatably supported at a predetermined position of the armrest main body and is loosely engaged with the operating shaft and has an opening that complements the non-circular cross-section of the operating shaft. An abutting portion is formed near the shaft to which the end of the operating shaft comes into contact, and by rotating the operating handle, the operating shaft moves relative to the abutting portion, and the armrest body An armrest device characterized in that the rotation of the armrest can be adjusted.