JP2751594B2 - Tilt unit and play method for tilt unit - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Summary] In a device having a fixed part and a movable part, when a movable part is positioned with respect to a tilt unit that supports the movable part so as to be rotatable and can be held at an arbitrary angle. A bracket attached to a fixing portion of the device, and two surfaces parallel to the tip and rotatably supported by the bracket so as to have a predetermined rotation resistance. And a bracket attached to the movable part of the apparatus and having a rectangular hole fitted to two surfaces of the rotary shaft, wherein the bracket attached to the movable part is a first bracket. The first bracket is fixed to the movable portion, the second bracket is fixed to the first bracket, and the second bracket is fixed to the movable portion. It is provided rectangular holes configured as provided by shifting an angle relative to the rectangular holes provided in the first bracket.

[Industrial applications]

The present invention relates to a tilt unit that supports a movable portion so as to be rotatable and can be held at an arbitrary angle in an apparatus having a fixed portion and a movable portion.

[Conventional technology]

Recently, OA devices such as a laptop personal computer and a laptop word processor as shown in FIG. 3 have been used, but these devices are small and portable so that an apparatus main body 2 including a keyboard 1 can be used. In contrast, the display unit 3 such as an LCD is foldable. In this case, a tilt unit 4 is used in a hinge portion of the display unit 3 so that the display unit 3 can be raised at the time of use and held at an arbitrary angle.

As shown in FIG. 4, the tilt unit 5
A rotating shaft 9 rotatably mounted on a bracket 6 attached to the movable member 10 and supported by spring washers 7, 7 'and a flat washer 8 so as to obtain a predetermined rotational resistance across the bracket 6. And a rectangular hole 11 fitted into a two-surface portion 9a formed with two parallel surfaces formed at the tip of the rotating shaft 9.
And a spring washer 7, 7 '.
The movable part 10 can be held at an arbitrary angle by a frictional force between the movable part 10 and the bracket 6.

[Problems to be solved by the invention]

In the above-described conventional tilt unit, if the rectangular hole 11 is made larger than the two surface portions 9a of the rotary shaft 9 so that the rotary shaft 9 and the hole 11 of the bracket 12 can be easily assembled and fitted, the following problem occurs. Occurs. That is, when the center line of the rotation axis of the tilt unit (hereinafter, referred to as a center line) and the line passing through the center of gravity of the movable unit 10 in the direction in which gravity acts (hereinafter, referred to as the center line), The play between the rotating shaft 9 of the tilt unit and the bracket 12 does not cause the displacement of the movable part 10, but when the center line and the center of gravity line are perpendicular and do not intersect, this play is caused by the displacement of the movable part 10. Cause. This is because, even if there is little backlash between the rotation shaft 9 of the tilt unit and the hole 11 of the bracket 12, the amount of positional deviation of the movable part farthest from the center line is proportional to the distance from the center line. Therefore, when the center line and the center of gravity line are perpendicular and do not intersect,
In order to eliminate the displacement of the movable portion, it is necessary to remove the play between the two surface portions 9a of the rotary shaft 9 of the tilt unit and the rectangular hole 11 of the bracket 12.

The two surfaces 9a of the rotary shaft 9 of the tilt unit and the bracket 12
In order to eliminate the play between the rectangular holes 11, there is a method in which the two surface portions 9 a of the rotating shaft 9 are made larger than the rectangular holes 11 and assembled by press fitting. There is also a method in which a tap is cut on the rotating shaft 9, a stupid hole is formed in a corresponding portion of the bracket, and a play between the rotating shaft and the bracket is removed by screwing. However, in the former, since it is difficult to accurately position the rotation axis of the tilt unit with respect to the bracket, there are problems such as an increase in cost for accurate positioning and a reduction in yield. In the latter case, when rotating the movable part, the torque generated by frictional force such as a coil spring or spring washer is received by the screw with the weakest strength at the tilt part. This causes a problem that the screw is broken.

The present invention has been made in view of the above-described conventional problems, and an object of the present invention is to provide a tilt unit that can prevent backlash when positioning a movable unit and that is easy to assemble. In order to achieve this, in the tilt unit of the present invention, a bracket 22 attached to the fixing portion 20 of the device, and two surfaces 26 that are rotatably supported by the bracket so as to have a predetermined rotational resistance and are parallel to the tip are formed. Rotation axis
27, attached to a movable part 28 of the device, and
In the tilt unit comprising a bracket having a rectangular hole that fits into the two surface portions 26, the bracket attached to the movable portion 28 includes first and second two brackets 29, 3
The first bracket 29 is fixed to the movable part 28 by screws, the second bracket 30 is fixed to the first bracket 29 by screws, and the rectangular hole 32 provided in the second bracket 30 is It is characterized by being provided at a certain angle with respect to the rectangular hole 31 provided in the 29.

Further, in the method for removing the backlash of the tilt unit of the present invention, the second bracket 30 is fixed to the first bracket 29 by screws using the tilt unit, so that the rotary shaft 27 is formed by the rectangular holes 31 and 32 of both brackets. It is characterized in that a preload is applied so as to fix the two surface portions 26.

(Operation)

The two brackets of the movable part which fits on the two surface parts 26 of the rotating shaft 27 supported by the bracket 22 attached to the fixed part of the apparatus and supports the rotating shaft 27 are provided.
Rectangular holes 31 and 32 fitted into the two surface portions 26 of the rotary shaft 27
Are formed so as to be shifted from each other by a certain angle, so that the four sides 26 of the rotating shaft 27 are
Preload can be applied to the two corners to support without backlash.

〔Example〕

FIG. 1 is a view showing an embodiment of the present invention, in which (a) is a top view, (b) is a front view, and (c) is a side view.

In this embodiment, as shown in FIG.
A bracket 22 attached at 21, and the bracket 22,
A rotating shaft 27 which is rotatably supported by spring washers 23, 24 and flat washers 25 so as to obtain a predetermined rotation resistance across the bracket, and has a two-faced portion 26 having two surfaces parallel to the tip. And two first and second brackets 29 and 30 which are fitted to the two surface portions 26 of the rotary shaft and have a rectangular hole slightly larger than the two surface portions and are attached to the movable portion 28 side of the apparatus. It is configured. Then, rectangular holes 31, 32 provided in the first and second brackets 29, 30 attached to the movable portion 28 side.
Are formed so as to be shifted from each other by a certain angle (θ). Further, the first bracket 29 is directly screwed to the movable portion 28 with a screw 33, and the second bracket 30 is screwed to the rising portion of the first bracket 29 with a screw 34. The angle θ at which the rectangular holes 31 and 32 are shifted is determined by the rectangular hole when the second bracket 30 is fixed to the first bracket 29 by screws.
The two sides 26 of the rotating shaft 27 at the two opposite sides of 31, 32
Is an angle that can be maintained while applying a preload.

The thus constructed embodiment is assembled to the apparatus as follows. That is, first, the bracket 22 to which the rotating shaft 27 is previously attached is screw-fixed to the fixing portion 20 of the apparatus with the screw 21. Next, as shown in FIG. 2A, after the rectangular hole 31 of the first bracket 29 on the movable portion side is fitted to the two surface portions 26 of the rotating shaft 27,
Screw 33 is used to fix the movable part 28 of the apparatus. Next, as shown in FIG. 2 (b), the rectangular hole 32 of the second bracket 30 is fitted to the two surface portions 26 of the rotating shaft 27. Next, the second bracket 30 is pulled and fixed to the rising portion 29a of the first bracket 29 as shown in FIGS.

By doing so, the first and second brackets
Assembling of the rotating shaft 27 with the rotating shaft 27 is extremely easy, and the rectangular holes 31 and 32 of the two brackets
Even if it is larger, it can be held without play while applying a preload.

〔The invention's effect〕

As described above, according to the present invention, there are provided two brackets on the apparatus movable part side for supporting the rotary shaft, and the rectangular holes are provided slightly larger than the two face portions of the shaft to be fitted, and are provided at a certain angle from each other. This makes it easy to assemble and makes it possible to hold the movable portion without play by applying a preload, thereby contributing to an improvement in the quality of the device having the movable portion.

[Brief description of the drawings]

FIG. 1 is a view showing an embodiment of the present invention, FIG. 2 is a view for explaining a method of assembling the apparatus according to the embodiment of the present invention, and FIG. 3 is a view showing a conventional laptop OA device. FIG. 4 is a view showing a conventional tilt unit. In the figure, 20 is a fixed part, 21, 33, 34 are screws, 22 is a fixed part side bracket, 23, 24 are spring washers, 25 is a flat washer, 26 is a two face part, 27 is a rotating shaft, 28 is a movable part, 29 Denotes a first bracket of the movable part, 30 denotes a second bracket of the movable part, and 31 and 32 denote rectangular holes.

 ──────────────────────────────────────────────────続 き Continuation of the front page (72) Inventor Yoshitaka Muraoka 1015 Kamiodanaka, Nakahara-ku, Kawasaki City, Kanagawa Prefecture Inside Fujitsu Limited (56) References JP-A-63-266207 (JP, A) (JP, U)

Claims (2)

(57) [Claims] 1. A bracket (22) attached to a fixing portion (20) of an apparatus, and two surfaces (2) supported rotatably on the bracket so as to have a predetermined rotational resistance and parallel to a tip.
6) The rotating shaft (27) formed with the movable part (28) of the device
And a bracket having a rectangular hole fitted to the two surface portions (26) of the rotary shaft (27), wherein the bracket attached to the movable portion (28) is a first and a second bracket. It consists of two brackets (29, 30). The first bracket (29) is attached to the movable part (28) by the second bracket (3
0) is a screw hole fixed to the first bracket (29), and a rectangular hole (32) provided in the second bracket (30) is a rectangular hole (31) provided in the first bracket (29). A tilt unit provided at a certain angle with respect to the tilt unit. 2. The rectangular holes (31, 32) of both brackets by screwing the second bracket (30) to the first bracket (29) using the tilt unit according to claim 1.
A method of removing a backlash of the tilt unit, wherein a preload is applied so as to fix the two surfaces (26) of the rotating shaft (27).