JPH0236294Y2 - - Google Patents

Description

[Detailed description of the invention] "Purpose of the invention" (Field of industrial application) This invention relates to a brake mechanism installed in the opening/closing mechanism of audio equipment, measuring equipment, etc. The present invention relates to a brake mechanism that makes it possible to easily adjust the strength of the brake within a movable stroke when applying the brake to a frame.

(Prior Art) In a lid opening/closing mechanism for audio equipment, measuring equipment, etc., a brake is used to apply a predetermined brake to a movable frame such as a mounting frame of the lid when the lid is opened or closed by a brake shoe. A conventional brake mechanism of this type is configured to maintain a constant state of brake application using a spring or the like.

(Problem to be solved by the invention) However, with the conventional brake mechanism described above, it is not possible to obtain an arbitrary braking force within the movable stroke of the movable frame, so when adjusting the movable range of the movable frame, etc. This required a large amount of force, which had the disadvantage of overloading the movable and fixed frames.

Further, repeated use under the above-mentioned conditions causes severe wear of the brake shoe, resulting in a deterioration of braking force.

The purpose of this invention is to eliminate the above-mentioned conventional drawbacks, and to make the movable frame work with a relatively small force by applying a strong braking force to the movable frame in a certain range and reducing the braking force in other areas where the brake is not required. The objective is to provide a brake mechanism that can.

"Structure of the invention" (Means for solving the problem) The brake mechanism of the lid opening/closing mechanism, etc. according to this invention is such that a rotating shaft with a threaded end is movable so as to serve as a movable fulcrum of a movable frame. A bearing member fixed to the frame and supporting the rotating shaft is arranged to be slidable in the axial direction, and a brake shoe is interposed between the movable frame and the bearing member,
A nut that fits into the threaded portion is movably supported by a nut receiving member disposed on a fixed frame.

(Function) For example, when the present invention is applied to a lid opening/closing mechanism, a movable frame serving as a lid mounting frame opens and closes using the rotation axis as a fulcrum. A rotating shaft fixed to the lid rotates when the lid is opened and closed, and a threaded portion is formed at the end (both ends) of the rotating shaft, and a nut fitted into this is placed on a fixed frame. When the rotary shaft rotates, the bearing member slides in the axial direction by the nut, thereby causing the brake shoe to press into or away from the lid. Therefore, for example, if you want to apply the brake when closing the lid, when the lid is closed, the brake shoe will come into pressure contact with the lid and apply the specified brake, and when the lid is opened, the braking force will be weakened and the brake force will be reduced. You can open the lid with force.

In order to set the angle at which the brake is applied when opening and closing the lid, it is sufficient to select the optimal thread pitch for the threaded portion and nut.

(Example) An example of the brake mechanism in the lid opening/closing mechanism etc. according to this invention will be explained based on the drawings. FIG. 1 is an exploded perspective view of the whole, FIG. 2 is a sectional view, and
The figure is a side view.

In the figure, reference numeral 1 denotes a rotating shaft that serves as a movable fulcrum for a movable frame 2 such as a lid mounting frame;
At both ends of the shaft main body part 11, a prismatic part 7 and a cylindrical part 8 are formed continuously, and a threaded part 9 is formed at the outer end of the prismatic part 7. The movable frame 2 has a square hole 12 formed therein, and is fixed to the rotating shaft 1 by fitting the square hole 12 into the square column part 7. Reference numeral 3 denotes a bearing member disposed in the cylindrical portion 8 to support the rotating shaft 1, with a circular hole 1 formed in the center.
3 by passing the cylindrical portion 8 through the cylindrical portion 8.
The top can be slid in the axial direction. Reference numeral 4 denotes a brake shoe interposed between the movable frame 2 and the bearing member 3, and the cylindrical portion 8 is inserted into the center hole 14 of the brake shoe. A nut 5 is fitted into the threaded portion 9, and this nut is movably supported by a nut receiving member 6 disposed on a fixed frame (not shown). The nut receiving member 6 is approximately box-shaped, and a notch 16 is formed in the wall 6a, into which the nut 5 is loosely fitted and supported.

``Effect of the invention'' According to the brake mechanism of the lid opening/closing mechanism, etc. according to this invention, when applied to the lid opening/closing mechanism, for example, when the lid is opened and closed, the movable frame that is the lid mounting frame rotates. The shaft rotates as a fulcrum, but the end of the rotary shaft is formed with a thread, and the nut fitted into this is supported by a nut receiving member disposed on the fixed frame. When the nut rotates, the nut moves and the bearing member slides in the axial direction, thereby causing the brake shoe to press into or away from the lid. Therefore, for example, when the lid is closed, the brake shoe comes into pressure contact with the lid and can apply the specified brake, and when the lid is opened, the braking force is weakened.
The lid can be opened with a small amount of force.

Incidentally, in order to set the angle at which the brake is applied when opening and closing the lid, it is sufficient to select the optimal thread pitch of the threaded portion and the nut.

As described above, it is possible to vary the strength of the braking force applied to the movable frame within the movable stroke of the movable frame, and the structure is simple and there are effects such as less wear on the brake shoe.

[Brief explanation of the drawing]

The drawings show an embodiment of the brake mechanism in the lid opening/closing mechanism, etc. according to this invention, with FIG. 1 being an overall exploded perspective view, FIG. 2 being a sectional view, and FIG. 3 being a side view. 1: Rotating shaft, 2: Movable frame, 3: Bearing member, 4: Brake shoe, 5: Nut, 6: Nut receiving member.

Claims (1)

[Scope of utility model registration request] a rotating shaft fixed to the movable frame to serve as a movable fulcrum of the movable frame and having a threaded portion formed at the end; a bearing member supporting the rotating shaft and disposed slidably in the axial direction; a brake shoe interposed between the movable frame and the bearing member; a nut that fits into the threaded portion;
A brake mechanism for a lid opening/closing mechanism, etc., comprising a nut receiving member disposed on a fixed frame to movably support the nut.