JPH0667920U - Opening and closing mechanism - Google Patents

Abstract

(57) [Abstract] [Purpose] To provide an opening / closing mechanism that is inexpensive and can obtain a strong fixing force. [Structure] In this opening / closing mechanism, the contact portion 1c and the contact member 2 of the shaft 1 inserted into the through hole 5a of the base 5 are connected.
By pressing the pressing fixing members 6 and 7,
c and the outer peripheral surface of the contact member 2 are brought into close contact with the inner peripheral surface of the through hole 5a. As a result, mutual rotation is suppressed by the frictional force acting between the contact portion 1c and the contact member 2 and the through hole 5a. Therefore, it becomes possible to stop the shaft 1 and the base 5 in a predetermined positional relationship.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 INDUSTRIAL APPLICABILITY The present invention is a device such as a laptop personal computer having a main body for input operation and an opening / closing section as a display section, which can be raised from the main body and stopped at an arbitrary angle. It relates to the opening and closing mechanism.

[0002]

[Prior art]

 2. Description of the Related Art Conventionally, personal computers, word processors, liquid crystal televisions, etc. have been commercially available that can be folded and stored by stacking an opening / closing part such as a display plate on the main body for convenience of carrying. In general, in these devices, it was not possible to reliably stop the opening / closing part at an arbitrary angle.

Therefore, in order to solve this, a tilt mechanism disclosed in Japanese Patent Application Laid-Open No. 63-266207 by the applicant of the present application has been devised. According to this tilt mechanism, the opening / closing portion 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]

[Problems to be solved by the device]

 In order to increase the fixing force in the tilt mechanism, it has been necessary to increase the number of plates, increase the force pressing the plates in contact, and increase the plate diameter. However, there is a limit to increasing the surface pressure of the plates and increasing the diameter of the plates, and there is a problem that increasing the number of plates increases the assembly cost. In particular, in devices such as laptop personal computers, increasing the diameter of the plate causes an increase in the thickness of the device, resulting in a decrease in commercial value.

The present invention has been made in view of the above-mentioned problems, and an object thereof is to increase the area of the abutting surface without increasing the number of parts or the size in the radial direction, thereby making it possible to provide a cheaper and stronger fixing force. It is to provide an opening / closing mechanism that can obtain

[0006]

[Means for Solving the Problems]

 The opening / closing mechanism of the present invention has a conical or frustoconical abutment part and a shaft attached to one of the main body and the opening / closing part of the device, and a conical or frustoconical abutment which rotates with the shaft. And a through hole having an inner peripheral surface shape which is inserted into the contact portion of the shaft and the contact member, respectively, which face each other, and which fits the contact portion and the contact member. The base provided on the other side of the main body and the opening / closing part of the device, the abutting part of the shaft attached to the shaft and the abutting member are pressed in the axial direction, and the corresponding abutting part and the outer peripheral surface of the abutting member are abutted. And a pressure fixing member which is brought into close contact with the inner peripheral surface of the through hole of the base.

[0007]

[Action]

 In the opening / closing mechanism of the present invention, the abutment part and the abutment member of the shaft inserted into the through hole of the base are pressed by the pressing and fixing member, so that the abutment part and the outer peripheral surface of the abutment member are inserted into the through hole. It is in close contact with the peripheral surface. As a result, mutual rotation 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 becomes possible to stop the shaft and the base in a predetermined positional relationship.

[0008]

【Example】

 1 is an exploded perspective view showing the construction 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, which is a cylindrical mounting portion 1a to be mounted on the main body of the device or an opening / closing portion, a cylindrical shaft portion 1b having a diameter smaller than this mounting portion 1a, and a cone or a cone provided therebetween. It is composed of a trapezoidal contact portion 1c.

Reference numeral 2 denotes an abutting member having a conical shape or a truncated cone shape. The contact member 2 in the present embodiment has substantially the same outer shape as the contact portion 1c of the shaft 1, and has a hole 2a formed at the center thereof and adapted to the shaft portion 1b.

The abutting portion 1c and the abutting member 2 of the shaft 1 are fitted with the pins 3 and 4 into the holes 1e, 1f, 2e and 2f provided in the end faces 1d and 2d on the apex side thereof. In particular, they are integrated and rotate together.

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

Reference numerals 6 and 7 are a coil spring 6 and a nut 7 as pressing and fixing members.

The above parts are assembled as follows. First, the shaft 1 and the abutting member 2 are inserted into the openings 5b and 5c of the through hole 5a from the end faces 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 and 4 are inserted into the contact portion 1c and the holes 1e, 1f, 2e, and 2f of the contact member 2 that abut in the through hole 5a. To insert them. After that, the coil spring 6 is fitted onto the shaft portion 1b of the shaft 1, and the nut 7 is attached to the screw portion 1g at the tip of the shaft portion 1b.

When assembled as described above, due to the elasticity of the coil spring 6, the abutting portion 1c of the shaft 1 and the abutting member 2 are pressed in directions toward each other. Therefore, the inclined outer peripheral surfaces of the contact portion 1c and the contact member 2 are pressed against the inclined inner peripheral surface of the through hole 5a of the base 5 to be in close contact with each other. As a result, the rotation of the shaft 1 is suppressed via the contact portion 1c and the contact member 2 due to the frictional force generated between the contact portion 1c and the contact member 2 and the base 5, and the desired shift with respect to the base 5 is achieved. It can be stopped due to the positional relationship.

Such a force that suppresses the rotation of the shaft 1 can easily widen the surfaces in contact with each other by extending the contact portion 1c, the contact member 2, the base 5 and the like in the axial direction. It can be increased.

In this embodiment, the abutting portion 1c and the abutting member 2 are connected using the pins 3 and 4, but the shaft portion 1b is formed into a prismatic shape so that the hole 2a has a shape suitable for this. Alternatively, the contact member 2 may be attached by a structure in which the contact member 2 is movable in the axial direction and is rotated together with the shaft 1.

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

Further, the shaft 1, the abutting member 2, the base 5 and the like can be formed of not only metal but also plastic or the like, and can be integrally formed with the main body of the device or the opening / closing part. A sound may be generated when the plastic parts are rubbed together. Therefore, when the shaft 1, the abutting member 2 and the base 5 are formed of plastic, one of the abutting surfaces of the shaft 1 and the abutting member 2 and the base 5 is plated with metal so that the frictional noises It can prevent the occurrence. Further, even if one of the shaft 1 and the abutting member 2 and the base 5 that abuts on the shaft 1 and the abutting member 2 is made of metal, it is possible to prevent the generation of a rubbing sound.

[0019]

[Effect of device]

 According to the present invention, the inclined peripheral surface formed on the shaft and the base is pressed in the axial direction to be brought into close contact with each other to suppress the rotation of the shaft, so that the number of parts and the size in the radial direction are increased. The contact area can be increased without doing so.

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

[Brief description of drawings]

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

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

[Explanation of symbols]

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

Claims (2)

[Scope of utility model registration request] 1. A shaft having a conical or frustoconical abutting part and attached to one of a main body and an opening / closing part of a device, and a conical or frustoconical abutting member which rotates together with the shaft. The abutting portion of the shaft and the abutting member have through holes having inner peripheral surface shapes that are inserted through the openings facing each other and have an inner peripheral surface shape that matches the abutting portion and the abutting member, and The base provided on the other side and the abutting portion of the shaft that is attached to the shaft and the abutting member are pressed in the axial direction so that the outer peripheral surface of the abutting member and the abutting member is the inner circumference of the through hole of the base. An opening / closing mechanism comprising: a pressure fixing member that is brought into close contact with a surface. 2. The opening / closing according to claim 1, wherein the contact member, the shaft and the base are made of plastic, and one of the contact surfaces of the contact member and the shaft and the base is metal-plated. mechanism.