JPH0451621Y2 - - Google Patents

Description

[Detailed description of the invention] Industrial application field This invention is a desk such as a study desk, a drafting desk, a computer operation desk, a work desk, etc., whose top plate angle can be adjusted to a desired angle. This invention relates to a top plate angle adjustment device.

Conventional technology and its problems Conventionally, this type of top plate angle adjustment device generally has the following features:
A support mechanism that pivots either the front or rear ends of the top plate to the desk body to make the top plate tiltable, and supports the top plate at a desired angle between the bottom surface of the top plate and the top surface of the desk body. It is said that the

However, in the case of the above-mentioned top plate angle adjustment device, since the essence of the top plate angle adjustment device is to adjust the angle while supporting the top plate in two positions in the front and rear directions, such a top plate angle adjustment device, especially This may lead to an increase in the size of the support mechanism, the complexity of the overall structure of the device, or the appearance of the desk may be impaired due to such increase in size and complexity. There was a problem.

On the other hand, conventional methods for adjusting the angle of inclination of the top plate include multi-stage and non-stage types. In some cases, a stepless type is preferred because it can be used for various purposes.

The conventional stepless type, as described in Japanese Utility Model Publication No. 61-16830, basically follows the above-mentioned support system in two positions, front and back, and the top plate is At the same time as pivoting the rear end to the desk body,
The front end side can be raised and lowered by a lifting mechanism consisting of a worm and a worm wheel.

However, in the case of such a configuration, the length between the pivot joint and the lifting mechanism is generally long, and in the lifting mechanism consisting of the worm and worm wheel as described above, it is difficult to move the worm due to the installation space. Due to height restrictions and the inability to increase the range of elevation of the top plate beyond a certain level, the range of adjustment of the angle of the top plate has to be extremely narrow.

This invention solves the above-mentioned conventional problems, makes it possible to downsize and simplify the top plate angle adjustment device, and thereby improves the appearance.
Moreover, it is an object of the present invention to provide a desk top plate angle adjusting device which is stepless and can secure a wide adjustment range of the top plate angle.

Means for Solving the Problems In order to achieve the above object, this invention is a desk top plate angle adjustment device interposed between a top plate and a top plate support part, and which has a predetermined number of teeth. an internal gear member having a toothed gear portion; an external gear member having an external gear portion having a predetermined number of teeth less than the number of teeth of the internal gear portion; and an external gear member having a toothed gear portion that slides into shaft holes of both gear portions. a rotating camshaft that is penetrated through the shaft and rotates the axis of one gear part relative to the axis of the other gear part while holding one gear part in an eccentric meshing state with respect to the other gear part; and an operating handle attached to a rotating camshaft, with one gear member facing the top plate and the other gear member facing the top plate when the axes of both gear parts are oriented horizontally in the left-right direction. The object of the present invention is to provide a desk top angle adjusting device, which is fixed to a supporting part side.

Function In the above-described top plate angle adjusting device, when the operating handle is operated to rotate the rotary camshaft, the gear parts of both gear members maintain an eccentric meshing state, and the axis of one gear part is aligned with that of the other gear part. It rotates relatively around the axis of the gear part. Since there is a predetermined difference in the number of teeth of these gear parts, when the rotating camshaft makes one rotation, for example, both gear members are displaced relative to each other in the rotational direction by an angle corresponding to the difference in the number of teeth. Become something to do. Here, one gear member is fixed to the top plate side and the other gear member is fixed to the top plate support part, so the top plate corresponds to the difference in the number of teeth of the gear parts by one rotation of the rotating camshaft. The angle will be changed by the angle. When the top plate is adjusted to the desired angle, even if a moment with the top plate angle adjustment device as a fulcrum acts on the top plate, the rotation angle of the operation handle and the corresponding rotation angle of the top plate will change the angle. Since the ratio is large, the top plate will not tilt.

Embodiments Hereinafter, this invention will be explained based on illustrated embodiments.

In FIG. 1, 1 is a rectangular top plate, and 2 is a desk body. The desk main body 2 has a leg seat 3, left and right legs 4, 4, and left and right top plate supports 5 along both sides of the top plate 1, by bending pipes and connecting them in a loop shape. , 5, and a rear crosspiece 6 along the rear part of the top plate 1. And the top plate 1 is
Approximately at the center of both side surfaces, it is supported by top plate supports 5, 5 via top plate angle adjustment devices 7, 7 so that the angle can be adjusted.

As shown in FIGS. 3 and 4, the top plate angle adjustment device 7 includes an internal gear member 8 fixed to the top plate 1 side and an external gear member fixed to the top plate support portion 5 side. 9 and a rotating camshaft 10 passing through both gear members 8 and 9.

The internal gear member 8 has left and right projecting mounting ears 1.
A perfectly circular recess 13 is formed in the center of a plate-shaped internal gear member main body 12 having 1 and 11,
An internal gear portion 14 having a predetermined number of teeth is formed on the inner circumferential surface thereof, and a perfectly circular shaft hole 15 is formed at the center of the recessed portion 13.
was drilled. This internal gear member 8
The mounting ears 11, 11 are attached to the hanging plate part 17 of the inverted L-shaped mounting member 16 attached to the lower side of the top plate 1.
By attaching with screws or the like, it is fixed to the top plate 1 side with the axis of the internal gear part 14 oriented horizontally in the left-right direction.

The external gear member 9 also has a circular convex portion 2 at the center of a plate-shaped external gear member main body 19 having a pair of upwardly protruding mounting ears 18, 18.
0 is formed, and the internal gear part 1 is formed on its outer peripheral surface.
An externally toothed gear portion 21 having a predetermined number of teeth less than the number of teeth of 4 is formed, and furthermore, a perfectly circular shaft hole 22 is bored in the center of the convex portion 20. By attaching the mounting ears 18, 18 to the top plate support part 5 by welding or the like, this external gear member 9 can be attached to the top plate support part in a state in which the axis of the external gear part 21 is oriented horizontally in the left and right direction. It is fixed to 5.

The rotary camshaft 10 includes, on its outer circumference, a perfectly circular internal gear member sliding portion 23 that fits into the inner circumference of the shaft hole 15 of the internal gear member 8 so as to be slidable in the rotational direction; Shaft hole 2 of external gear member 9
2 has a perfectly circular external gear member sliding part 24 which is slidably fitted in the inner peripheral part in the rotational direction, and
The internal gear member sliding part 23 and the external gear member sliding part 24 are in a state where both the gear parts 14 and 21 are eccentric with respect to each other when the internal gear member 8 and the external gear member 9 are respectively fitted. It is made relatively eccentric so that it meshes with the Further, the rotary camshaft 10 has a connecting portion 26 adjacent to the internal gear member sliding portion 23 and having a larger diameter than the sliding portion 23, and the connecting portion 26 and the internal gear member A stepped portion 25 is provided at the boundary with the member sliding portion 23.
It is said that it was formed by

The internal gear member 8, the external gear member 9, and the rotating camshaft 10 are
is passed through each of the shaft holes 15 and 22 of the internal gear member 8 and the external gear member 9, and the stepped portion 25 of the rotary camshaft 10 is brought into contact with the outer bottom surface of the recess 13 of the internal gear member 8, so that both the inner and outer gears With the parts 14 and 21 in mesh with each other, the collar-shaped positioning member 27 is fitted onto the outer peripheral surface of the rotary camshaft 10 adjacent to the external gear member 9, thereby creating an assembled state. An operating handle 28 is attached to the tip of the rotating camshaft 10.

The two top plate angle adjusting devices 7, 7 have a connecting rod 30 in a recess 29 having a polygonal cross section formed on the outer peripheral surface of the connecting portion 26 in the rotary camshaft 10.
By fitting the ends of the mounting member 16, they are connected to each other through the hole 33 formed in the hanging plate portion 17 of the mounting member 16, as shown in FIG. By rotating an operating handle 28 attached to one of the rotary camshafts 10, the other rotary camshaft 10 can also be rotated synchronously.

Note that the desk body 2 has a pair of left and right support columns 31 formed by bending a single pipe on the rear crosspiece 6;
31 is erected, and a shelf 32 is attached to its upper end.

Next, the operating state of the top plate angle adjusting device having the above configuration will be explained. To change the angle of the top plate 1, the rotating camshaft 10 is rotated by rotating the operating handle 28. In this case, as described above, the two rotary camshafts 10 in the left and right top plate angle adjustment mechanisms 7, 7 are in a relationship in which they can be interlocked by the connecting rod 30, so if either one of the operating handles 28 is operated, both the rotating camshafts 10 Rotating camshaft 10
rotates synchronously. Then, Fig. 5 a, b
As shown in , the internal gear member sliding part 23 and the external gear member sliding part 24 in the rotary camshaft 10 are those in which the axis of one of them rotates relatively around the axis of the other. becomes. As a result, both the inner and outer gear portions 14, 21 of both gear members 8, 9 operate in a manner in which the axis of one of them rotates relatively around the axis of the other in an eccentrically meshed state. When the operating handle 28, that is, the rotary camshaft 10 makes one rotation, for example, the two gear members 8, 9 move at an angle corresponding to the difference in the number of teeth between the inner and outer gear parts 14, 21 with respect to the initial positional relationship. It is a relative displacement around the axis by that amount. Here, the internal gear member 8
is fixed to the top plate 1 side, and the external gear member 9 is fixed to the top plate support part 5 side, so the angle of the top plate 1 relative to the top plate support part 5 changes by the above displacement amount. . For example, the number of teeth of the internal gear part 14 is 10.
If the number of teeth of the external gear portion 21 is 9, the angle of the top plate 1 changes by an angle corresponding to a difference of 1 in the number of teeth, that is, 36°. When the top plate 1 is set at a desired angle, a moment is applied to the top plate 1 by placing an object on the top plate 1 or resting an elbow on the top plate 1, using the top plate angle adjustment devices 7, 7 as a fulcrum. However, since the ratio between the rotation angle of the operating handle 28 and the displacement angle of the top plate corresponding to the rotation angle is large, there is no risk that the top plate 1 will tilt due to the rotational moment.

In addition, in this invention, an internal gear member may be fixed to the top plate support part 5 side, and an external gear member may be fixed to the top plate 1 side. Further, in the above embodiment, the top plate angle adjustment devices 7, 7 are used on the left and right sides of the top plate 1, respectively.
The top plate can be supported by one top plate support part through one top plate angle adjustment device at the lower part thereof, or the top plate can be supported by three or more top plate support parts. It is also possible to arrange a top plate angle adjustment device in combination with each of them. Furthermore, the number of teeth and the difference in the number of teeth between the gear parts 14 and 21 in both gear members 8 and 9 are determined by how many times the top plate 1 should be changed for one rotation of the rotary camshaft 10 for convenience of the user. It can be determined as appropriate by considering the following. In this case, in order to reduce the change angle of the top plate 1 per one rotation of the rotary camshaft 10, it is sufficient to increase the number of teeth and set a small difference in the number of teeth. In order to increase the number of teeth, the number of teeth may be decreased and the difference in the number of teeth may be set to be large. Also,
In the embodiment described above, the rotary camshafts 10 of the left and right top plate angle adjustment mechanisms 7, 7 are connected by a connecting rod 30, but it is not necessary to use the connecting rod 30. In that case, the angle of the top plate can be adjusted by operating both the left and right handles 28 at the same time.

Effects of the invention As described above, this invention, as a desk top angle adjustment device, consists of an internal gear member fixed to either the top plate or the top support part, and an external gear member fixed to the other. A simple construction is adopted, which includes a rotary camshaft that rotates the shaft center of one shaft center and the other shaft center while holding both the inner and outer gear parts of both gear members in an eccentrically meshed state. Since the top plate is supported at one location in the front and rear directions while changing its angle, such devices are centrally installed at that location, and therefore the top plate is supported at two positions in the front and rear directions. In the case of conventional devices that change the angle while tilting the top plate, the support mechanism has to be enlarged due to the angle adjustment range of the top plate, and as a result, the entire top plate tilting device becomes large. This problem can be solved, the entire top plate angle adjusting device can be downsized, and the external appearance of the desk can be improved. In addition, the present invention
A stepless method is adopted to change the angle of the top plate, and it is possible to make subtle adjustments to the angle of the top plate, and it goes without saying that the angle of the top plate can be adjusted smoothly and smoothly. The range of adjustment of the angle of the top plate can be ensured much wider than in the case of a conventional elevating mechanism consisting of a worm and a worm wheel.

[Brief explanation of the drawing]

FIG. 1 is a perspective view showing a desk equipped with a top plate angle adjustment device according to an embodiment of the invention, FIG. 2 is a front view thereof, and FIG. 3 is an exploded perspective view showing the top plate angle adjustment device. FIG. 4 is a partial sectional view showing the top plate angle adjusting device, and FIGS. 5a and 5b are sectional views taken along the line -- in FIG. 4 showing the operating state of the top plate angle adjusting device. DESCRIPTION OF SYMBOLS 1... Top plate, 5... Top plate support part, 7... Top plate angle adjustment device, 8... Internal gear member, 9... External gear member, 10... Rotating camshaft, 14...
...Internal gear part, 15...Shaft hole, 21...External gear part, 22...Shaft hole, 28...Operation handle.

Claims (1)

[Scope of Claim for Utility Model Registration] A desk top plate angle adjusting device interposed between a top plate and a top plate support part, comprising an internal gear member having an internal gear part with a predetermined number of teeth; , an external gear member having an external gear part having a predetermined number of teeth less than the number of teeth of the internal gear part; and an external gear member that is penetrated in sliding contact with the shaft holes of both gear parts, and that connects one gear part to the other gear part. A rotating camshaft that rotates the axis of one gear part relative to the axis of the other gear part while maintaining the gear part in an eccentric meshing state, and an operating handle attached to the rotating camshaft. In a state where the axes of both gear parts are oriented horizontally in the left-right direction, one of the gear members is fixed to the top plate side, and the other gear member is fixed to the top plate support side. Features a desk top angle adjustment device.