JPH0755624Y2 - Display panel tilting mechanism - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial application] The present invention relates to a display panel tilting mechanism in a small electronic device such as a small electronic calculator.

[Prior Art] Conventionally, in a small-sized electronic computer, a main body case provided with a key input unit for inputting information such as calculation data,
A display case provided with a display panel for displaying information such as calculation data input by the key input unit and the result of the calculation, and the like. There is one in which the display case is tiltably connected to the main body case by a tilting mechanism so that the angle can be changed.

The tilting mechanism of this small electronic calculator is, for example, a shaft with a fixed ratchet integrally formed at the center of tilting of the main body case, and the shaft is inserted at the tilting center of the display case facing this, and fixed by a coil spring. The structure has a movable ratchet that can be pressed against the ratchet. The fixed ratchet has radial teeth formed on the surface facing the movable ratchet. The movable ratchet has an insertion hole through which the shaft is inserted in the center, and a tooth that engages with the tooth of the fixed ratchet in a disengageable manner.The mounting hole is formed in the tilt center of the display case. It is arranged so that it can slide. In this case, the movable ratchet is formed with a recessed groove on the outer peripheral surface thereof, into which the guide protrusion in the mounting hole is inserted and guided so as not to rotate in the mounting hole.

In such a tilting mechanism, when the display case is tilted with respect to the main body case against the pressure contact force of the movable ratchet by the coil spring, the movable ratchet is rotated accordingly, and the tooth portion of the movable ratchet is fixed. Get over the teeth of one after another. Then, when the tilting of the display case is stopped at a predetermined tilt position, the movable ratchet is pressed against the fixed ratchet by the coil spring in a state where the tooth portion of the movable ratchet and the tooth portion of the fixed ratchet mesh with each other.
The rotation of the movable ratchet is suppressed. As a result, the display case is fixed at a predetermined inclination angle without rotating.

[Problems to be solved by the invention] However, in the tilting mechanism described above, a shaft having a fixed ratchet is provided in the main body case, a mounting hole is formed in the display case, and a movable ratchet that meshes with the fixed ratchet is slid in the mounting hole. Since the movable ratchet is provided as much as possible and the movable ratchet is pressed against the fixed ratchet by the coil spring, the structure is complicated and the number of parts is large, so that there is a problem that assembly is troublesome.

An object of the present invention is to provide a display panel tilting mechanism that can be efficiently assembled by using a simple structure with a small number of parts.

[Means for Solving the Problems] The present invention provides a shaft at one of opposing ends of a display case for accommodating a display panel and a main body case, and a bearing hole into which the end of the shaft is inserted at the other opposing end. Provided in the bearing hole, a spring member presses against a small diameter portion in the bearing hole to contract the end portion of the shaft so that the shaft portion can be held and pressed against the spring member. A movable chuck member having a chuck portion that reduces the holding force at the end is slidably arranged.

[Operation] According to the present invention, when the movable chuck member is pressed against the spring member when the display case is tilted with respect to the main body case, the holding force of the end portion of the shaft by the chuck portion of the movable chuck member. Therefore, the display case can be smoothly tilted with respect to the main body case in this state. Then, when the display case is fixed at a predetermined inclination angle, when the pressure on the movable chuck member is released, the chuck portion contracts by being pressed against the small diameter portion in the bearing hole by the urging force of the spring member. A portion grips and holds the end of the shaft. Thereby, the display case can be fixed to the main body case at a predetermined inclination angle. In addition, the structure is simple in structure because the movable chuck member is slidably provided in the bearing hole via the spring member so that the number of parts is small.

[Embodiment] An embodiment of the present invention will be described below with reference to FIGS. 1 to 3.

FIG. 1 is an exploded perspective view of a small electronic computer. This small electronic computer has a keyboard 1 for inputting information such as calculation data, a liquid crystal display panel 2 for displaying information such as data input by the keyboard 1 and calculation results thereof, and a power supply for the entire computer. A solar cell 3 to be supplied, a main body case 4 for accommodating the keyboard 1, and a display case 5 for accommodating the liquid crystal display panel 2 and the solar cell 3 are provided.
The display case 5 is tiltably connected to the body case 4 by a tilting mechanism 6 and an auxiliary friction imparting mechanism 7, which will be described later.

The keyboard 1 includes a fixed contact sheet 8 fixed to the bottom of the body case 4, and a spacer 9 on the fixed contact sheet 8.
It is composed of a movable contact sheet 10 which is adhered via a sheet, and a rubber key sheet 11 provided on the movable contact sheet 10. In this case, a large number of contacts (not shown) are spaced apart from and face each other on the facing surfaces of the fixed contact sheet 8 and the movable contact sheet 10 so that they can contact and separate from each other. Also the key sheet
11 has a large number of key buttons 12 corresponding to the respective contacts facing each other.
... is formed. In such a keyboard 1, when the key button 12 of the key sheet 11 is pressed, the movable contact sheet 10 at that portion is bent, and the contacts facing each other come into contact with each other and become conductive. A liquid crystal display panel 2 and a solar cell 3 are electrically connected to the keyboard 1 by a flexible connecting member 13.

The body case 4 is composed of an upper case 14 and a lower case 15 made of synthetic resin.
And the keyboard 1 is stored inside these,
The upper case 14 and the lower case 15 are joined together by screws (not shown). In this case, the upper case 14 is formed with openings 16 ... In which the key buttons 12 of the keyboard 1 are inserted and exposed. The display case 5 is an upper case made of synthetic resin.
17 and a lower case 18, the liquid crystal display panel 2 and the solar cell 3 are housed inside them, and the upper case 17 and the lower case 18 are joined by screws (not shown). In this case, openings 19 and 20 are formed in the upper case 17 so as to correspond to the liquid crystal display panel 2 and the solar cell 3, respectively.

The tilting mechanism 6 includes columnar inner hinge portions 21, 21 formed near both sides of the rear end of the upper case 14 of the main body case 4.
And the cylindrical outer hinge portions 22, 22 formed on both sides at the front end of the upper case 17 of the display case 5 are rotatably connected by shafts 23, 24, and one (left rear side) shaft 23 The movable chuck member 25 is removably grasped and held, and the movable chuck member 25 is biased by a coil spring 26. In this case, the other (right front side) shaft 24 has a mounting hole 27 formed at the center of the inner hinge portion 21 on the body case 4 side.
And a bearing hole 28 formed at the center of the outer hinge portion 22 on the display case 5 side so as to be rotatable.

2 and 3 are enlarged cross-sectional views of the main part of the tilting mechanism 6. The shaft 23 is inserted and fixed in a mounting hole 29 formed at the center of the inner hinge portion 21 on the body case 4 side. Further, a bearing hole 30 is formed in the outer hinge portion 22 on the display case 5 side so as to penetrate right and left. The inner wall of the bearing hole 30 is formed with a tapered small-diameter portion 31 whose outer side (left side) is narrow and whose inner side (right side) is wide. A movable chuck member 25 is slidably disposed in the bearing hole 30 via a coil spring 26. This movable chuck member 25 is a chuck part.
32 and the button portion 33 are integrally formed of synthetic resin, and the chuck portion 32 is arranged inside the small diameter portion 31 of the bearing hole 30.
Is arranged outside the small diameter portion 31 and can be pressed from the outside. In this case, the chuck portion 32 has a "mortar" shape, and a plurality of slits are cut in the wall thereof, so that the chuck portion 32 can be contracted and deformed. That is, the chuck portion 32 moves within the tapered small diameter portion 31 of the bearing hole 30 and contracts when it comes into pressure contact with the small diameter portion 31, and grips and holds the end portion 23a of the shaft 23 inserted therein in a detachable manner. . Further, the coil spring 26 is disposed between the button portion 33 and the small diameter portion 31 and always biases the movable chuck member 25 in the direction to push it outward, that is, the direction in which the chuck portion 32 is pressed against the small diameter portion 31.

The auxiliary friction applying mechanism 7 is for auxiliary application of a predetermined frictional force when the display case 5 is tilted with respect to the main body case 4, and is configured as shown in FIG.
That is, at the front end of the lower case 18 of the display case 5, the shaft 23,
A shaft portion 34 is integrally formed coaxially with 24. A boss 35 is formed at a rear end of the lower case 15 of the body case 4 facing the boss 35, and a tightening hinge 36 is tightened and fixed to the boss 35 by a screw 37. The tightening hinge 36 is formed by bending an intermediate portion of a strip-shaped thin metal plate into a substantially cylindrical shape, and extending both ends thereof in parallel with each other with a predetermined interval. Then, by tightening the parts extending in parallel with the screw 37, the curved part contracts in accordance with the tightening amount and a frictional force is applied.

According to the tilting mechanism 6 of the small-sized electronic computer configured as described above, the movable chuck member 25 is normally urged toward the outside (left side) by the coil spring 26 as shown in FIG. The chuck portion 32 moves inside the bearing hole 30 toward the outside, that is, toward the small diameter side of the tapered small diameter portion 31. Therefore, the chuck portion 32 is pressed against the small diameter portion 31 and contracted in the radial direction, and holds and holds the end portion 23a of the shaft 23. Therefore, the shaft 23 is restrained from rotating by the holding force of the chuck portion 32, and the chuck portion 32 is restrained from rotating by being pressed against the small diameter portion 31, so that the display case 5 with respect to the main body case 4 is prevented. The display panel 2 is fixed without rotating, whereby the display panel 2 is fixed to the main body case 4.

When the display panel 2 is tilted at a predetermined tilt angle with respect to the body case 4, first, the button portion 33 of the movable chuck member 25 is pressed against the coil spring 26 from the outside. Then, as shown in FIG. 2, the chuck portion 32 moves inside the bearing hole 30, that is, toward the large diameter side of the tapered small diameter portion 31, so that the end portion 23a of the shaft 23 is inserted into the chuck portion 32. Even if is inserted by the amount of movement, the chuck portion 32 spreads without pressing against the small diameter portion 31, and the holding force for the end portion 23a of the shaft 23 is reduced. Therefore, in this state, the display case 5 can be tilted with respect to the body case 4, and the display panel 2 can be tilted with respect to the body case 4 at a predetermined tilt angle.

That is, when the display panel 5 is tilted in this state, the holding force of the end portion 23a of the shaft 23 by the chuck portion 32 is reduced, so that the display case 5 can be smoothly rotated about the shafts 23 and 24. You can In this case, since the display case 5 is given an appropriate frictional force by the auxiliary friction applying mechanism 7, the display panel 2 is tilted favorably. Then, when the display panel 2 is tilted at a predetermined tilt angle, when the external force is removed from the button portion 33 of the movable chuck member 25, the movable chuck member 25 is urged outward by the coil spring 26 as described above. The chuck portion 32 again grasps and holds the end portion 23a of the shaft 23. Therefore, the display case 5 is fixed to the main body case 4, whereby the display panel 2 can be fixed at a predetermined inclination angle.

Although the auxiliary friction imparting mechanism 7 is provided in the above-described embodiment, it is not always necessary to provide it. Further, the present invention is not limited to the above-mentioned small electronic computer, but can be widely applied to other electronic devices having a display panel.

[Effect of the Invention] As described in detail above, according to the present invention, the chuck portion holds and holds the end portion of the shaft by the biasing force of the spring member in the bearing hole into which the end portion of the shaft is inserted. A configuration in which a movable chuck member is slidably arranged and the movable chuck member is pressed against a spring member to reduce the holding force of the end portion of the shaft by the chuck portion and tilt the display case with respect to the main body case. Therefore, with a simple structure, the number of parts is small, the display panel can be smoothly tilted, and the display panel can be fixed at a predetermined tilt angle.

[Brief description of drawings]

1 to 3 show an embodiment of the present invention, FIG. 1 shows an exploded perspective view of a small electronic calculator, and FIG. 2 shows a state in which a chuck portion of a tilting mechanism holds an end portion of a shaft. FIG. 3 is an enlarged cross-sectional view of an essential part, and FIG. 3 is an enlarged cross-sectional view of an essential part showing a state in which the chucking force of the end of the shaft is reduced. 2 ... Liquid crystal display panel, 4 ... Main body case, 5 ... Display case, 6 ... Tilt mechanism, 23 ... Shaft, 23a ... End part, 25
…… Movable chuck member, 26 …… Coil spring, 30 …… Bearing hole, 31 …… Small diameter part, 32 …… Chuck part.

Claims (1)

[Scope of utility model registration request] 1. A main body case, a display case for accommodating a display panel, a shaft provided at one of opposite ends of the main body case and the display case, and a small diameter formed inside the other opposite end. A bearing hole into which the end portion of the shaft is inserted, and a chuck portion slidably disposed in the bearing hole and gripping the end portion of the shaft by contracting by pressing against the small diameter portion. A movable chuck member; and a spring member that constantly urges the chuck portion of the movable chuck member in a direction of pressing the movable chuck member against the small diameter portion. By pressing the movable chuck member against the spring member, A display panel tilting device, wherein the holding force of the end portion of the shaft by the chuck portion is reduced, and in this state, the display case is rotated with respect to the main body case to tilt the display panel. .