JPS6031538Y2 - desk height adjustment device - Google Patents

Description

[Detailed description of the invention] This invention is a desk for learning in which a top plate is attached to a desk base with a cabinet on at least one side so that it can be raised and lowered.
The purpose of the height adjustment device for various types of desks, such as office and work desks, is to raise and lower the top plate, that is, to make the height adjustment extremely easy with a single bundle operation from the front side of the desk. It is an object of the present invention to provide the above-mentioned adjusting device with a simple structure, which allows the bundle to be folded and stored in a cabinet when not in operation so as not to interfere with the original use of the desk.

Generally, as a type of desk with an adjustable top plate, a pair of left and right legs hung vertically on the top plate and the corresponding desk base position are engaged through engagement between a rack and a pinion. However, it is known that the top plate is moved up and down by the rotation of the pinion.

However, in conventional desks of this type, the legs of the top plate are located toward the rear of both the left and right sides, so the operating section, such as the bundle that rotates the pinion, faces toward the back or side of the desk. For this reason, the user has to go around to the back or side of the desk to adjust the height, and additionally, there is no extra space on the control panel for this operation. There is an inconvenience in that the desk must be placed with a certain amount of space.

On the other hand, in order to arrange the operation section on the front side of the desk, the structure of the transmission section from the pinion section to the operation section becomes complicated, the transmission section deteriorates the appearance of the desk, and furthermore, the operation section There are problems such as the bundle etc. interfering with the original use of the desk.

This invention is intended to eliminate the above-mentioned drawbacks, and one embodiment of this invention will be described below with reference to the drawings.

As shown in the figure, the desk 1 has a base 2 which has a cabinet 3 on the right side when viewed from the front, and a top plate 4 that has a pair of left and right legs 5 that are suspended from the base 2.
, 5 so that it can be raised and lowered freely.

The base 2 has a left side panel 6 in the shape of a hollow rod with a partially cut out front upper part, a right side panel 7 in the form of an approximately rectangular hollow frame located opposite to this, and a lower part bent forward to form a stepped part 8 for a footrest. The cabinet 3 has a box-shaped interior made up of the right side panel 7, the rear panel 9, the side plate 10, and the top plate 11, and a front side The cabinet 3 has large and small drawers 12.13 that can be drawn out vertically, and the front main part of the cabinet 3 is occupied by front plates 12b and 13b provided with handles 12ay and 13a of the drawers 12.13.

The top plate part 4 is constructed in the shape of a horizontally long box frame from left and right side frame materials 14, 14 and a top plate 15, and inside thereof, wide and narrow drawers 16 and 17 that can be drawn out to the front side are arranged on the left and right. Stored in good condition.

Each mounting plate has an abbreviated cross-section and is fixed in contact from the lower surface to the inner surface of both side frame members 14 and 14, and the front and rear ends of the upright pieces 18a are extended and fixed to the back surface of the top plate 15. A leg piece 5 and a stopper 19, 19 whose at least tip is made of a cushioning material such as rubber are vertically provided on the lower surface of the top plate portion 4 near the rear side via the leg piece 18.

Each leg piece 5 consists of a slightly flat rectangular cylindrical body, and a slit 20 is formed along the vertical direction in the side wall portion 5a on the inner surface side of the desk, and a rack 21 is provided in the inner rear portion 5b corresponding to the slit 20 in the vertical direction. It is fixedly installed.

Therefore, the leg pieces 5, 5 can freely slide in slightly flat rectangular cylindrical sliding frames 22, 22 that are fitted and fixed along the vertical direction at rear positions in the left and right panels 6.7 of the base 2. Depending on the gap between both 5 and 22, the cap member 23 is fitted into the upper edge of the opening of each sliding frame 22 and the ball heads at both ends of the pin 5C are fixed through the lower end of the leg piece 5. It is prevented from sticking.

Note that a scale 5d indicating the height of the top plate portion 4 is provided on the outer surface of the right leg piece 5.

On the other hand, the base 2 has both sliding frames 22.2 of the left and right panels 6.7.
A rotating shaft 24 is horizontally mounted between the sliding frames 22, 2.
The slit 20 of the leg piece 5 penetrates the desk inner side wall 22a of 2.
A pair of pinions 25.25 that mesh with the rack 21.21 are fixed to both ends of the rotating shaft 24 that is fitted into the cabinet 3, and a worm wheel 26 is fixed to a position of the rotating shaft 24 near the center of the cabinet 3. There is.

Further, near both ends of the rotating shaft 24, coil springs 27, 27, which are rotated in opposite directions to each other, are connected to a rectangular cylindrical body 2 surrounding the rotating shaft 24.
The coil spring 27. 27, the top plate portion 4 is always urged in the upward direction at the meshing portion between each rack 21 and the pinion 25.

The worm 31 further rotates the worm wheel 26.
are two U-shaped frame pieces 32a, 32 fixed in a U-shaped frame portion 28a extending from the square cylinder body 28 and facing upward in cross section.
A mounting bracket 33 having a substantially U-shaped cross section is attached to the front shaft end of the square frame-shaped mounting member 32 formed by opposing joints b.
The rear end of the drive shaft 34 is connected to the rear end of the drive shaft 34 via.

This drive shaft 34 is located on the lower surface side of the upper plate 11 of the cabinet 3 and at a corner on the center side of the desk along the front and back direction of the desk.
It is rotatably mounted via a mounting bracket 35, and a bendable bundle 36 is fixed to the front end thereof.

The bundle 36 includes a shaft-like connecting base 36a fitted to the end of the shaft 34 and an operating lever portion 36 rotatably connected to the shaft-like connecting base 36a.
b, a split groove 37 is formed along the axial direction from the front end of the connecting base 36a, and a leaf spring 38 is fixed to one side of the split groove 37, which is biased so as to push the tip bent portion 38a into the connecting base 36a. has been done.

On the other hand, the operating lever part 36b consists of a lever piece 39, a knob pin 40 protruding forward from the tip of the lever piece 39, and a spindle 41 fixed to the base end of the lever piece 39. A tongue-like connecting piece 41a having a semicircular tip is provided to fit into the split groove 37.

Therefore, the connection base 36a and the operation lever part 36b are
With the connecting piece 41a inserted into the split groove 37, the screw hole 42
It is rotatably connected around a screw 43 that is screwed into a screw hole 42b through a.

In addition, locking recesses 44a and 44 are provided on the peripheral side of the connecting piece 41a.
b, and in a state where the connecting base 36a and the shaft portion 41 are on the same axis, that is, in the operating position shown by the dashed line in the sixth figure, the tip bent portion 38a of the leaf spring 38 is in the locking recess 44.
a and stabilizes the above-mentioned posture by the spring force thereof, and also in a state where the operation lever part 36b is bent, that is, in a non-operation posture shown by the broken line in the sixth figure, the tip bent portion 3
8a engages with the locking recess 44b and similarly maintains this posture stably.

Furthermore, a horizontally long opening 46 is formed in a rim material 45 made of plastic or the like that constitutes the upper edge of the front side of the cabinet 3, and the bundle 36 is inserted into the drive shaft 34 through the corner of the opening 46 on the center side of the desk. It is fixed to the front end,
When the operating lever part 36b is in the operating position, the cabinet 3
It protrudes forward and can be rotated in this state, and is folded and stored in the rear space 47 of the opening 46 when not in operation.

To perform this folding operation, hold the handle 3 so that the tip of the lever piece 39 is in a substantially horizontal state facing toward the center of the desk.
6 and rotate the operating lever portion 36b in the horizontal direction from this position.

In the desk 1 having the above configuration, the operating lever part 36b of the handle 36 is raised from the stored state in the empty space 47 and placed in a protruding position in front of the cabinet 3 as shown in the first figure, and by rotating it, the drive shaft The rotating shaft 24 rotates based on the engagement between the worm 31 and the worm wheel 26 connected to the worm wheel 26, and the pinions 25 and 25 that engage the racks 21 and 21 simultaneously rotate to rotate the left and right leg pieces 5 and 5.
The height of the top plate part 4 can be arbitrarily adjusted in a stepless manner by raising and lowering them at the same rate.

At this time, when the rotation of the handle 36 is stopped, the rotating shaft 2
4 is locked, the top plate part 4 is prevented from lowering due to its own weight, and is securely held at a desired height position.

When the height adjustment is completed, the operating lever part 36b of the handle 36 can be housed in the space 47 through the opening 46 in the upper edge of the cabinet 3, as shown by the broken line in the sixth figure.

Incidentally, since the stored forces of the coil springs 27, 27 act against the load on the top plate 4, the lifting operation of the top plate 4 is performed using the nimble handle 36 similar to the lowering operation. This can be done by rotating.

Furthermore, the stoppers 19 prevent the base 2 and the top plate 4 from colliding when the top plate 4 is lowered to the lowest position.

As described above, in the desk height adjusting device according to the present invention, the top plate is supported in a vertically movable manner by a pair of left and right legs hanging from a desk base having a cabinet on at least one side. The handle for raising and lowering the top of a desk is mounted on the front side of the cabinet, so you have to go around to the back or side of the desk to adjust the height of the top. There is no need to do so, and it can be operated extremely easily from the front side of the desk. Also, when arranging the desk, there is no need to take up space behind or on the side for the above operations, which allows for the use of indoor space without restrictions on the placement location. available for use.

Moreover, since the drive shaft connected to the handle is placed on the bottom side of the top panel of the cabinet, the drive shaft part is not exposed to the outside, giving the desk a good appearance, and the handle can be operated from the front side of the desk. It has a height that is easy to operate, making it very easy for the user to operate the handle while checking the convenient position of the top plate while sitting on a chair, for example.

Furthermore, in this invention, the above-mentioned handle is bendable, and when not in use, the handle is folded and stored in a space opened at the upper edge of the front side of the cabinet, so even though the handle is attached to the front side of the desk, The handle does not get in the way when the desk is used for its intended purpose, and it looks good on the outside of the desk.

In addition, in an embodiment in which the drive shaft is disposed on the bottom side of the upper panel of the cabinet and in the corner of the center side of the desk, the handle position is closer to the user sitting on the chair as described above, and the Operation becomes easier.

Furthermore, in this invention, a pair of pinions that mesh with the racks provided on both legs of the top plate are fixed and integrated at both ends of one rotating shaft, so that the lifting and lowering operations of both legs are completely synchronized by the rotational drive mentioned above. This prevents the top plate surface from tilting to one side or wobbling when the top plate section is raised and lowered.

In addition, since the rotation of the handle is transmitted to the rotating shaft using the worm and worm wheel, there is no need for a special locking mechanism, and since no gas spring or electric power device is used, the entire device is It has an extremely simple structure and can be manufactured and provided at low cost, and is highly durable with little risk of failure.

[Brief explanation of the drawing]

The drawings show one embodiment of this invention; Fig. 1 is a perspective view of the entire desk, Fig. 2 is a front view of the main parts cut away, and Fig. 3 is a cross-sectional view of the desk.
A cross-sectional view taken along the line ■-■ in the figure, Figure 4 is a cutaway perspective view of the main part showing the meshing part between the rack of the leg piece and the pinion, and Figure 5 is the meshing of the worm wheel of the rotating shaft and the worm of the drive shaft. FIG. 6 is a perspective view showing the bending operation of the handle at the upper front edge of the cabinet; FIG.
The figure is a perspective view of the handle. 1...Desk, 2...Base, 3...
・Cabinet, 4...Top plate section, 5...
・Leg piece, 11... Upper plate, 21... Rack, 24... Rotating shaft, 25... Pinion, 26... Worm Wheel, 31...
... Worm 34 ... Drive shaft, 36 ... Bundle, 46 ... Opening, 47 ... Blank space.

Claims (2)

[Scope of utility model registration request] (1) In a desk in which a table base is provided with a cabinet on at least one side, and a top plate is supported so as to be able to rise and fall via a pair of left and right legs suspended from the desk base, the pair of legs engages with racks provided on both legs. A rotary shaft with pinions fixed to both ends and a worm wheel fixed in the middle is mounted horizontally on the base of the desk, and the drive shaft of the worm that rotates the worm wheel is mounted on the underside of the top plate of the cabinet in the longitudinal direction of the desk. A bendable bundle for rotating the shaft is attached to the end of the shaft located on the front side of the cabinet, and the bundle is folded and stored through an opening at the upper edge of the front side of the cabinet. A height adjustment device for a desk that has a hollow space. (2) The desk height adjusting device according to claim 1, wherein the worm drive shaft is disposed on the bottom side of the upper panel of the cabinet and at the corner of the center side of the desk.