JPH0449710Y2 - - Google Patents

Description

[Detailed description of the invention] [Field of industrial application] The present invention relates to a keyboard that is placed on a desk and operated as a data input device for office computers, personal computers, word processors, etc. The present invention relates to a keyboard angle variable mechanism that can vary the tilt angle.

[Prior Art] A conventional keyboard angle variable mechanism of this type is disclosed in Japanese Patent Application Laid-open No. 72538/1983. This keyboard case has a pair of angle variable parts on the rear left and right sides of the keyboard case. Each angle variable part is roughly composed of a lever, a pivot joint, and a foot. By rotating the lever, the foot is exposed on the desk side through a slit formed at the bottom of the keyboard case and rotates back and forth. The inclination angle of the operating surface of the keyboard is set by the foot engaging the locking surface.

[Problems to be Solved] However, the above-mentioned conventional keyboard case angle variable mechanism has the following problems.

In other words, a pair of angle variable parts are provided on the rear left and right sides of the keyboard case, and the feet support the keyboard, and the support structure is a support beam at both ends, so a large number of angle variable parts are placed in the center of the keyboard case. When the keyboard switch is pressed, the central part of the keyboard bends, which increases the amount of vertical movement of the keyboard switch, making keyboard operations unstable and having a negative impact on normal touch operations. Furthermore, the structure of the variable mechanism for changing the angle of the operating surface of the keyboard is complicated, and has many parts, making assembly difficult.

The purpose of the present invention is to solve the above-mentioned problems, and to provide a keyboard angle variable mechanism that has a simple structure, fewer parts, and can change the angle of the operating surface without impairing the original stable keyboard operation. There is a particular thing.

[Means for Solving the Problems] In order to solve the above problems, the keyboard angle variable mechanism according to the present invention has a configuration including a storage recess that opens at the bottom of the keyboard case, and a mechanism that can be folded in and raised from the storage recess. A rotating plate that is pivotally supported and protrudes from the bottom surface of the keyboard case when raised from the housing recess to set the keyboard case operation surface at a first inclination angle; a stopper that comes into contact with the bottom surface of the keyboard case and restricts the rotation angle of the rotating plate from the housing recess to a predetermined obtuse angle with respect to the bottom of the keyboard case; The keyboard case protrudes from the recess to make the keyboard case operating surface have a second inclination angle that is smaller than the first inclination angle.

[Function] According to this configuration, since the rotary plate is accommodated in the accommodation recess in the folded state, when the keyboard is placed on the desk in this state, the inclination angle of the operation surface is set to a small value (second inclination angle) possible.
Furthermore, when the rotating plate is extended from the storage recess, the opening degree of the long rotating plate is maintained at a predetermined obtuse angle by the stopper, so if the keyboard is placed on a desk in this state, the inclination angle of the operating surface will be increased. Settings (1st
angle of inclination) possible.

[Example] Next, an example of the present invention will be described based on the drawings.

FIG. 1 is a longitudinal sectional side view of a keyboard to which an embodiment of the keyboard angle variable mechanism according to the present invention is applied.

FIG. 2 is a bottom view of the lower case of the keyboard.

FIG. 3 is a rear view of the keyboard.

FIG. 4 is an exploded perspective view showing the same embodiment.

In the figure, 1 is a keyboard, which is roughly composed of a keyboard case 10, a number of keyboard switches 20, a printed circuit board 21, and a long rotating plate 30 as internal components.

The keyboard case 10 has a split structure consisting of an upper case 11 and a lower case 12, and an opening 11a is formed in the upper case 11 made of synthetic resin so that the key tops of the keyboard switch 20 protrude. The lower case 12 is integrally assembled with the upper case 12 using screws 13.
The front side of the bottom plate of the lower case 12 is an inclined plate part 14.
It is formed as a housing recess 1 near the back side.
5 is provided.

As shown in FIG. 4, the accommodation recess 15 is formed across the width direction of the lower case 12, and has grooves 15a, 15a on both sides of the interior thereof, and a platform 15 between them.
It has b. The accommodation recess 15 has a long rotating plate 30
It has a size and depth that can accommodate the lower case 12, and is constructed simultaneously with the molding of the lower case 12.

The elongated rotary plate 30 is an integrally molded product of synthetic resin, and includes thick end portions 31, 31 on both sides, a flat plate portion 32 connecting these ends, and a pair of stoppers standing up on both sides of the flat plate portion 32. parts 33, 33 and flat plate-like part 3
A pair of notches 32a formed on both sides of the tip of 2,
32a, and a shaft portion 34 integrally formed at the base of the flat plate portion 32 with a connecting portion 34a.

A support hole 31a is formed at the base of the thick end portions 31, 31, and is fitted into the pivot shaft 16, 16 protruding from the inner surface of the accommodation recess 15. On the other hand, the lower case 12 at the base portion 15b of the accommodation recess 15
Bearing parts 18, 18 which rotatably support the shaft-like part 34 of the elongated rotary plate 30 are formed near the edge 17 of. Further, a plurality of clamping plate parts 19 protrude from the edge 17 so as to sandwich the shaft-shaped part 34 (see FIG. 2). Note that the tip of the flat plate portion 32 is slightly bent inward.

According to this angle variable mechanism, the long rotating plate 3
0 into the storage recess 15 (as shown by imaginary lines in FIG. 1), the stoppers 33, 33 become legs that support the back side of the keyboard 1, and the inclination angle of the operating surface becomes α. To change the inclination angle, insert your finger into the notch 32a and raise the elongated rotating plate 30. The stopper parts 33, 33 will engage the edge 17 and the elongated rotating plate 30 will open at an obtuse angle. Regulate by. When the keyboard 1 is placed in this state, the tips of the long rotating plates 30 become legs that support the back side of the keyboard 1, and the inclination angle of the operation surface becomes β, which is larger than α. Thus, by folding in or letting out the long rotating plate 30, the inclination angle of the operating surface can be varied.

In the state of the inclination angle β, the rotation angle of the rotation plate 30 is maintained at a predetermined obtuse angle, so even if an external force is applied to the keyboard, it is difficult to rotate.
The keyboard can be kept stable and key touch operations can be performed stably. In addition to this, the tip of the flat plate portion 32 is slightly bent inward to increase the cross-sectional area of the flat plate portion 32, which has a significant effect.

Since the conventional pair of angle variable parts are independent on the left and right, the angle variable adjustment must be made separately for each, and if one is forgotten to adjust, rattling will occur.In contrast, according to this embodiment. , long rotating plate 30
Since the angle variable mechanism is constituted by the above, the elongated rotary plate 30 can be folded in and extended out with a simple operation, and rattling does not occur.

Since the elongated rotating plate 30 is attached to the external bottom surface of the lower case 12, there is no need to incorporate any angle variable mechanism elements into the internal spacer of the lower case 12, and therefore the internal spacer is Effective use or the keyboard 1 can be made thinner.

By forming the stopper portion 33, the elongated rotating plate 3
The long rotary plate 30 can be securely rotatably locked to the edge 17 at the L-shaped portion defined by the base portion of the 0 and the stopper portion 33.

[Effects of the Invention] As explained above, the keyboard angle variable mechanism according to the present invention provides the following effects.

When the rotating plate is erected and the operation surface of the keyboard case is at the first inclination angle, the stopper comes into contact with the bottom surface of the keyboard case, and the rotating angle from the accommodation recess of the rotating plate with respect to the bottom surface of the keyboard case is reduced. Since the angle is maintained at a predetermined obtuse angle, the rotating legs have longer legs than when the rotating plate is erected perpendicularly to the bottom surface of the keyboard case and the keyboard case has the same first inclination angle. be able to. Therefore, even if an external force is applied to the keyboard, the rotating plate will be more difficult to rotate in the direction of folding into the housing recess than a rotating plate that stands up vertically, so the keyboard can be moved to the first inclination angle. This means that it can be maintained stably.

When the rotating plate is at a position forming a predetermined obtuse angle, the stopper comes into contact with the bottom surface of the keyboard case, thereby reliably restricting further rotation of the rotating plate. The support structure that supports the angular position is also sturdy, and the keyboard case can be stably maintained in the first inclined position with a simple structure.

The stoppers protruding from the rotating plate act as legs that make the keyboard case operation surface have a second inclination angle smaller than the first inclination angle when the rotating plate is accommodated in the housing recess. Since the plate is housed in the housing recess, only the stopper can protrude from the bottom surface of the keyboard case. Therefore, it is possible to prevent the second inclination angle of the operating surface of the keyboard case from becoming too large due to the thickness of the rotating plate. Moreover, since the stopper comes into contact with the bottom surface of the keyboard case when the keyboard is used at the first inclination angle, the housing recess opened in the keyboard case only needs to have the minimum size that can accommodate the rotating plate. Therefore, restrictions on the circuit component storage space inside the keyboard case due to the storage recess can be kept to a minimum.

When the stopper is set to the first inclination angle, the rotation angle of the rotary plate is maintained at a predetermined obtuse angle and held stably, and when the stopper is set to the second inclination angle, it is used as a leg, so the number of parts is reduced. Furthermore, the structure is simple and the ease of assembly is improved.

[Brief explanation of drawings]

FIG. 1 is a longitudinal sectional side view of a keyboard to which an embodiment of the keyboard angle variable mechanism according to the present invention is applied. FIG. 2 is a bottom view of the lower case of the keyboard. FIG. 3 is a rear view of the keyboard. FIG. 4 is an exploded perspective view showing the same embodiment. 1... Keyboard, 10... Keyboard case, 11... Upper case, 11a... Opening, 1
2...Lower case, 13...Screw, 14...Slanted plate part, 15...Accommodation recess 15, 15...Groove part, 1
5b... Base, 16... Axis, 17... Edge, 1
8... Bearing part, 19... Holding plate part, 20... Keyboard switch, 21... Printed circuit board, 30...
...Long rotating plate, 31...Thick walled end, 31a...
Support hole, 32... flat plate-like part, 33... stopper part, 34... shaft-like part, 34a... connection part.

Claims (1)

[Scope of utility model registration request] A storage recess that opens at the bottom of the keyboard case, and a keyboard that is pivoted to the storage recess so that it can be folded in and raised freely, and when raised from the storage recess, it protrudes from the bottom of the keyboard case to set the keyboard case operating surface at a first inclination angle. A rotating plate, which is provided protrudingly from the rotating plate and comes into contact with the bottom surface of the keyboard case when the rotating plate is raised to regulate the rotation angle of the rotating plate from the accommodation recess to the bottom of the keyboard case to a predetermined obtuse angle. and a stopper, the stopper protruding from the accommodation recess when the rotary plate is accommodated in the accommodation recess to make the keyboard case operation surface have a second inclination angle smaller than the first inclination angle. Adjustable keyboard angle mechanism.