JPH02771Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION This invention relates to a tilt angle adjustment mechanism for a display device used, for example, as a computer terminal.

With the spread of office automation, especially small computers, the number of operators operating the terminals, or display devices, is rapidly increasing. In order to reduce this and increase the efficiency of use, there is a growing momentum to study the relationship between operators and display devices from an ergonomics perspective. Therefore, the present applicant first applied for the
-39255, we proposed an angle adjustment means that can steplessly adjust the CRT screen to match the operator's posture. That is, in this angle adjustment means, a gutter-like curved wall is provided on the bottom wall of the housing including the CRT, and a braking body that frictionally contacts the curved wall is provided on the base side that supports the housing. The housing is held in any rotational position by frictional force. Therefore, according to this, just by applying an appropriate force to the housing,
Although the CRT screen can be tilted to any desired angle and is extremely easy to operate, this mechanism requires a larger amount of space and is not necessarily suitable for small display devices. . Furthermore, since the above-mentioned curved wall and brake body must be designed and finished with high precision, mold costs and the like increase accordingly, and there remains room for improvement in terms of cost.

Therefore, the purpose of this invention is to provide a low-cost tilt angle adjustment mechanism that can be installed within a limited space.

Hereinafter, this invention will be described in detail with reference to embodiments shown in the accompanying drawings.

As shown in FIG. 1, this inclination angle adjustment mechanism has fixed legs such as rubber feet on the front or rear part of the main body housing 1 containing the CRT (not shown) of the display device, in this embodiment, the front part. 2 is provided, and the inclination angle of the main body housing 1 is adjusted using the fixed leg 2 as a fulcrum, and its internal structure is shown in FIG. That is,
This inclination angle adjustment mechanism includes rotatable movable legs 3 that protrude from the bottom surface of the main body housing 1 at a position near the rear thereof. This movable leg 3 is
It has two arms 3a, 3a that are inserted into the main body housing 1 through openings 4, 4 formed in the bottom wall 1a of the main body housing 1, and the ends of each arm 3a, 3a are It is fixed to the rotating shaft 5 which is rotatably supported by the bottom wall portion 1a by bearing members 6,6. In this embodiment, the rotating shaft 5 has a circular cross section at both ends held by the bearing members 6, 6, but the other parts are formed into a hexagonal column shape, while the ends of each arm 3a, 3a have a circular cross section. is provided with a hexagonal hole that fits into the hexagonal column, so that the rotating shaft 5 and the movable leg 3 can rotate together.

According to this invention, a gear 7 is coaxially fixed to the rotating shaft 5, and a rotation stopper member is provided on the bottom wall 1a to mesh with the gear 7 and stop its rotation. 8 is slidably disposed. The rotation stopper member 8 slides into and out of engagement with the gear 7 via an operating lever 9. In this case, the operating lever 9 is moved from the rear side of the main body housing 1 to the rotating shaft 5. It extends almost orthogonally to
A pair of legs 9 parallel to each other is provided on one end side of the
a and 9a are arranged in succession, and the rotation stopper member 8 is integrally provided between them. Note that, on the other end side of the operating lever 9, there is a push button portion 9b bent along the back wall of the main body housing 1, for example.
A guide pin 10 and a slit 11 are formed between the operating lever 9 and the bottom wall 1a.
A sliding guide means is provided.

Further, on the bottom wall portion 1a, a screen portion 12 is provided erected to face the rotation stopper member 8 at a predetermined distance. The stopper member 8 is connected to the gear 7.
A spring 13 is interposed that urges toward. Referring to FIG. 3, the rotation stopper member 8 has engaging teeth 1 that mesh with the teeth 14 of the gear 7.
5 is provided. In this case, move the movable leg 3 to the
When the main body housing 1 is rotated clockwise in the figure so as to be perpendicular to a flat stand such as a desk, the main body housing 1 is in the maximum depression angle state.On the other hand, when the movable legs 3 are rotated counterclockwise in the figure, the bottom wall portion 1a When made parallel, the main body housing 1 is in the maximum elevation state, and when the movable legs 3 are set at any position between them, a counterclockwise load is applied to the gear 7 via the rotating shaft 5. Therefore, in this embodiment, the gear 7
Of the two tooth contact surfaces 14a and 14b of the teeth 14, one tooth contact surface 14a receives the load;
The tooth contact surface 14a and the tooth contact surface 15a of the engaging tooth 15 that cooperate with each other are formed to be parallel to the diameter line of the gear 7, so that the load of the main body housing 1 can be reliably received. .

In the above configuration, in order to change the inclination angle of the display device, the push button portion 9 is pressed and the operating lever 9 is slid against the spring 13 to remove the rotation stopper member 8 from the gear 7. As a result, the gear 7 becomes free, so that the movable leg 3 can be rotated to any angular position. That is, when the display device is brought to an optimal angle by hand or the like, the movable legs 3 will obtain the optimal angle due to their own weight. And push button part 9
When the pressing force b is released, the rotation stopper member 8 is pressed toward the gear 7 by the spring 13, and its engaging teeth 15 mesh with the teeth 14 of the gear 7, causing the gear 7 and the movable leg 3 to rotate. It will become impossible to lock. In this way, the inclination angle of the main body housing 1 can be set to a desired angle.

As explained above, according to this invention, it is possible to obtain a tilt angle adjustment mechanism that is simple in structure and inexpensive and can be incorporated into a limited space of a display device. Therefore, it greatly contributes to downsizing and cost reduction of display devices.

Note that, unlike the above embodiment, the fixed leg 2 is provided at the rear of the main body housing 1, and the movable leg 3 is provided at the rear of the main body housing 1.
may be arranged so as to be provided at the front part, and accordingly, the operating lever 9 may be operated from the front of the main body housing 1.

[Brief explanation of the drawing]

Fig. 1 is a side view of a display device equipped with an inclination angle adjustment mechanism according to this invention, Fig. 2 is a perspective view of a main part of this invention, and Fig. 3 is a cross section for explaining the relationship between the gear and the rotation stopper member. It is a diagram. In the figure, 1 is a housing, 2 is a fixed leg, 3 is a movable leg, 5 is a rotating shaft, 7 is a gear, 8 is a rotation stopper member, 9 is an operating lever, 13 is a spring, and 15 is an engaging tooth.

Claims (1)

[Claims for Utility Model Registration] (1) An inclination angle adjustment mechanism that includes a fixed leg provided at the front or rear of a main body housing in a display device, and adjusts the inclination angle of the main body housing using the fixed leg as a fulcrum, a movable leg attached to be able to rotate integrally with a rotating shaft supported on the bottom wall of the main housing; a gear coaxially fixed to the rotating shaft; and a gear fixed to the rotating shaft; a slidable operating lever extending along the bottom wall from the front or rear so as to be substantially orthogonal to the rotation axis; and an engaging tooth that is disengaged from the gear via the operating lever. A tilt angle adjustment mechanism for a display device, comprising a rotation stopper member and a spring that biases the rotation stopper member toward the gear. (2) In claim (1) for utility model registration, the tooth contact surface of the gear and the tooth contact surface of the engaging tooth that cooperates with the tooth contact surface are formed parallel to the diameter line of the gear. A tilt angle adjustment mechanism for a display device.