JP2603059Y2 - Opening and closing mechanism - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION The present invention relates to a device such as a laptop personal computer having a main body for performing input operations and an opening / closing section as a display section. The present invention relates to an opening and closing mechanism that can be stopped at an angle.

[0002]

2. Description of the Related Art Conventionally, personal computers, word processors, liquid crystal televisions, and the like have been marketed in such a manner that an opening / closing portion such as a display plate is overlapped on a main body so as to be easily carried and folded to be stowable. In general, in these devices, the opening / closing unit cannot be reliably stopped at an arbitrary angle.

To solve this problem, a tilt mechanism disclosed in Japanese Patent Application Laid-Open No. 63-266207 by the present applicant has been devised. According to this tilt mechanism, the opening / closing unit can be stopped at an arbitrary angle by the frictional force between the rotating plate attached to the shaft and the fixed plate fixed to the base.

[0004]

In order to increase the fixing force in the tilt mechanism, it is necessary to increase the number of plates, increase the force for pressing the abutting plate, or increase the diameter of the plate. Was. However, there is a limit in increasing the surface pressure of the plate or increasing the diameter of the plate, and there is a problem that increasing the number of plates increases the assembly cost. In particular, in a device such as a laptop personal computer, there is also a problem that increasing the diameter of the plate increases the thickness of the device and lowers the commercial value.

[0005] The present invention has been made in view of the above problems,
It is an object of the present invention to provide an inexpensive opening / closing mechanism capable of obtaining a stronger fixing force by increasing the area of a contact surface without increasing the number of parts and the size in the radial direction.

[0006]

The opening / closing mechanism of the present invention has a contact portion in the shape of a cone or a truncated cone and a shaft attached to one of the main body and the opening / closing portion of the device, and has a cone or a truncated cone shape. A contact member which rotates together with the shaft, a through-hole having an inner peripheral surface shape adapted to be inserted into the contact portion of the shaft and the contact member from the corresponding opening and adapted to the contact portion and the contact member; And a base provided on the other of the main body and the opening / closing part of the device, and attached to the shaft and pressing the contact part of the shaft and the contact member in the axial direction to form the contact part and the contact member. A press-fixing member for bringing an outer peripheral surface into close contact with the inner peripheral surface of the through hole of the base , the contact member, the shaft and the base.
Is made of plastic, and
Metal plating is applied to one of the surfaces of the base contacting .

[0007]

In the opening / closing mechanism of the present invention, the contact portion of the shaft inserted into the through hole of the base and the contact member are pressed by the pressing and fixing member, so that the contact portion and the outer peripheral surface of the contact member penetrate. It is in close contact with the inner peripheral surface of the hole. Thereby, the rotation of each other is suppressed by the frictional force acting between the outer peripheral surfaces of the contact portion and the contact member and the through hole. Therefore, it is possible to stop the shaft and the base in a predetermined positional relationship.
In particular, the contact member, shaft and base must be plastic.
The contact member, shaft and base
Metal plating on one of the contact surfaces
The generation of rubbing sounds can be prevented.

[0008]

FIG. 1 is an exploded perspective view showing the structure of an opening / closing mechanism according to an embodiment of the present invention, and FIG. 2 is a sectional view of the opening / closing mechanism shown in FIG. Reference numeral 1 denotes a shaft, a cylindrical mounting portion 1a mounted on a main body or an opening / closing portion of the device, and a mounting portion 1a.
It is composed of a cylindrical shaft portion 1b having a smaller diameter than a, and a conical or frustoconical contact portion 1c provided therebetween.

Reference numeral 2 denotes a contact member having a conical or truncated conical shape. The contact member 2 in this embodiment has substantially the same outer shape as the contact portion 1c of the shaft 1, and has a hole 2a in the center that fits the shaft portion 1b.

The contact portion 1c of the shaft 1 and the contact member 2
Are integrated by turning the pins 3 and 4 into holes 1e, 1f, 2e and 2f provided in the end surfaces 1d and 2d on the vertex side, and rotate together.

Reference numeral 5 denotes a base, and a through hole 5 is provided in the center of the base.
a is provided. The through hole 5a is formed so as to fit when the contact portion 1c and the contact member 2 of the shaft 1 are fitted into the openings 5b and 5c, respectively.
That is, the through hole 5a is formed in a drum shape with a narrow center.

Reference numerals 6 and 7 denote a coil spring 6 and a nut 7 as a pressing and fixing member.

The above components are assembled as follows. First, the shaft 1 and the contact member 2 are inserted into the openings 5b and 5c of the through hole 5a from the end surfaces 1d and 2d, respectively. At this time, the shaft portion 1b of the shaft 1 is passed through the hole 2a of the contact member 2, and the pins 3, 4 are inserted into the contact portion 1c abutting in the through hole 5a and the holes 1e, 1f, 2e, 2f of the contact member 2. Insert and connect them. Thereafter, the coil spring 6 is externally fitted to the shaft portion 1b of the shaft 1, and a nut 7 is attached to the screw portion 1g at the tip of the shaft portion 1b.

When assembled as described above, the contact portion 1c of the shaft 1 and the contact member 2 are pressed toward each other by the elasticity of the coil spring 6. For this reason, the inclined outer peripheral surfaces of the contact portion 1c and the contact member 2 are pressed against the inclined inner peripheral surfaces of the through holes 5a of the base 5 to be in close contact with each other. Thereby, the contact portion 1c and the contact member 2
The rotation of the shaft 1 is suppressed by the frictional force generated between the shaft 5 and the base 5 via the contact portion 1c and the contact member 2, and the shaft 5 can be stopped in a desired positional relationship with respect to the base 5.

The force for suppressing the rotation of the shaft 1 can be easily expanded by extending the contact portion 1c, the contact member 2, the base 5 and the like in the axial direction. , It is possible to enhance.

In this embodiment, the contact portion 1c and the contact member 2 are connected using the pins 3 and 4, but the shaft portion 1b
The contact member 2 may be attached by a structure that is rotatable together with the shaft 1 while the contact member 2 is movable in the axial direction, for example, by making the hole 2a into a shape that conforms to the hole 2a.

Further, instead of the coil spring 6 and the nut 7, a disc spring or a push nut may be used to press and fix.

Further, a shaft 1, a contact member 2, a base 5
Etc. are formed of plastic or the like, can be integrally molded with the body or closing portion of the instrument. In addition, a sound may be generated when the plastic parts are rubbed together.
Therefore, by performing metal plating on one surface abutting the sheet Yafuto 1 and the abutment member 2 and the base 5, and Ide proof the occurrence of rubbing each other sounds. Also, the shaft 1 and the contact member 2
It is also possible to form one or all of the base 5 in contact with them with metal .

[0019]

According to the present invention, the rotation of the shaft is suppressed by pressing the shaft and the inclined peripheral surface formed on the base in the axial direction so that the rotation of the shaft is suppressed. The contact area can be increased without increasing the size. In particular, abutment members and shafts and
Metal plating on one of the contact surfaces
Abutment member, shaft and
It is possible to prevent generation of a sound in which the bass rubs.

Further, since each component can be assembled simply by assembling it in the axial direction of the shaft, mass productivity is excellent.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view showing a configuration of an opening and closing mechanism according to an embodiment of the present invention.

FIG. 2 is a sectional view of the opening and closing mechanism shown in FIG.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Shaft 1c Contact part 2 Contact member 5 Base 5a Through hole 6 Coil spring 7 Nut

Claims (1)

(57) [Scope of request for utility model registration] A shaft having a conical or truncated cone-shaped contact portion and being attached to one of the main body and the opening / closing portion of the device; a contact member having a conical or truncated cone shape and rotating with the shaft; The contact portion of the shaft and the contact member each have a through hole that is inserted from an opposing opening and has an inner peripheral surface shape adapted to the contact portion and the contact member. A base provided on the other side, and an abutting portion of the shaft and an abutting portion of the shaft and the abutting member being pressed in the axial direction so that an outer peripheral surface of the abutting portion and the abutting member are formed on an inner periphery of a through hole of the base. And a pressing and fixing member that is brought into close contact with the surface , wherein the contact member, the shaft and the base are formed of plastic.
Of the contact surface of the contact member and the shaft and the base.
An opening and closing mechanism characterized in that one side is plated with metal .