JP2001279989A - Tilt hinge device and precision instrument utilizing the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a tilt hinge device capable of being miniaturized in a direction orthogonal to a rotary shaft center, formed with a high degree of accuracy in a manner such as to obtain a rotational torque with homogeneity and stability, and produced efficiently. SOLUTION: In the tilt hinge device provided with a rotary shaft body 15 and a bearing fitting unit 20 having a bearing part 22 for bearing the shaft body 15, the bearing part 22 of the fitting unit 20 is provided with the first bearing piece 30 provided with the first half-split curl part 32 fitted with an arc-shaped cross section inner surface 32a contacting the outer periphery surface 16a of a rotary shaft part 16, the second bearing piece 40 provided with the second half-split curl part 42 fitted with an arc-shaped cross section inner surface 42a contacting the surface 16a of the shaft part 16, and a sandwich-holding means 24 for holding the shaft part 16 in such a condition as to sandwich the shaft part 16 between the bearing pieces 30, and 40.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a tilt hinge device and a precision device using the same.

[0002]

2. Description of the Related Art In precision equipment such as OA equipment such as word processors and personal computers, navigation systems, digital video cameras and CCD surveillance cameras, a display device is connected to a device body by a tilt hinge. This tilt hinge device has a structure in which the display device is stably stopped at an arbitrary angle such as a position opened at a predetermined angle with respect to the device body.

FIG. 7 shows an example of a conventional tilt hinge device 70 (Utility Model Registration No. 2547422). Reference numeral 72 denotes a rotating shaft which also serves as a support for a display device (not shown), and 74 denotes a mounting base 74a for attaching to a device main body (not shown).
And a bearing plate 74b. The rotating shaft 72 is inserted through the bearing plate 74b, and a friction washer 76 is disposed between the large-diameter portion 72a of the rotating shaft 72 and the bearing plate 74b, and a friction washer 7 is provided on the other side of the bearing plate 74b.
8. The spring washer 80 and the holding washer 82 are arranged in this order, and the end of the rotating shaft 72 is swaged to fix the holding washer 82 and tighten the gap between the washers to obtain a predetermined rotation torque. ing.

In the tilt hinge device 70 having such a configuration, in order to generate a predetermined rotation torque and obtain sufficient durability, the size (outer diameter) of the friction washers 76 and 78 is set to a predetermined diameter. I need to do that. That is, in order to properly secure the friction area of the friction washers 76 and 78 and obtain a stable torque, the outer diameter thereof is larger than a certain value. Therefore, there is a limit in obtaining a desired rotation torque and reducing the outer dimensions of the tilt hinge device 70 in a direction perpendicular to the rotation axis.
For this reason, it has not been possible to reduce the size sufficiently in response to thinner precision equipment.

On the other hand, conventionally, a device having a rotating shaft 88 as shown in FIG. 8 and a bearing unit 91 which rotates relatively while bearing the rotating shaft 88 is used. The bearing fitting unit 91 has an integrated curl portion 92 wound around a rotary shaft 88, and the curl portion 92 is attached to the rotary shaft 88 by being screwed to the rotary shaft 88. Thus, the inner surface 92a of the integrated curl portion 92 and the outer peripheral surface 88a of the rotating shaft 88 come into contact with each other, and a frictional force is generated when rotating relatively. According to this, as compared with the one using the friction washers 76, 78, the diameter (the outer dimension in the direction perpendicular to the rotation axis) about the rotation axis is relatively increased without increasing the diameter. The contact area between moving objects can be increased. Therefore, a predetermined high rotation torque can be obtained and the size can be reduced.

[0006]

However, the tilt hinge device 90 shown in FIG.
It is difficult to form the cylindrical integrated curl portion 92 with high productivity and high accuracy, and it is difficult to obtain a uniform and stable rotation torque. That is, in order to form the integrated curl portion 92, it is necessary to perform a step of winding around a shaft and forming the same. Also,
Since a winding step is required, the dimensional accuracy tends to vary. In particular, the outer peripheral surface 88a of the rotating shaft 88
Inner surface 92a (curved surface) of an integrated curl portion 92 that comes into contact with
Is difficult to form with high precision. Further, due to the rigidity of the integral curl portion 92 itself, the inner surface 92 a cannot be brought into close contact with the outer peripheral surface 88 a of the rotating shaft 88. For this reason, it was difficult to obtain a uniform and stable rotation torque. In addition, a mold suitable for such a process is expensive.

Accordingly, an object of the present invention is to make it possible to reduce the size in the direction orthogonal to the rotation axis and to form the rotation torque with high precision so as to obtain a uniform and stable rotation torque.
Another object of the present invention is to provide a tilt hinge device that can be efficiently manufactured.

[0008]

To achieve the above object, the present invention has the following arrangement. That is, the tilt hinge device according to the present invention connects the first member and the second member so as to be relatively rotatable, and holds the first member and the second member at an arbitrary angle. A rotating shaft body having a columnar rotating shaft portion and a first mounting portion fixed to the first member so as to have an angle holding function, a bearing portion for bearing the rotating shaft portion, and And a bearing unit having a second mounting portion fixed to the second member, wherein the bearing portion of the bearing unit is a cross-sectional circle that contacts an outer peripheral surface of the rotating shaft portion. A first bearing piece including a first half-curled portion provided with an arc-shaped inner surface, and a second half-shaped portion provided with an arc-shaped inner surface in contact with an outer peripheral surface of the rotating shaft portion A second bearing piece having a curl portion, the rotating shaft and the bearing fitting unit; As bets and is rotatable by a relatively predetermined torque, wherein said first bearing piece relative to the rotation shaft portion second
And holding means for holding in a state of being sandwiched between the bearing pieces.

[0009] Further, the pinching and holding means is provided with the first holding means.
The engaging portion provided on one end side of the first half-curled portion and engaged with the engaged portion of the second bearing portion, and the first half-curled portion A first fixing portion provided on the other end side of the first bearing member and the second bearing piece;
The first half is provided at one end of the second half-curled portion.
The engaged portion to be engaged with the engaging portion of the bearing piece;
And a second fastening portion provided on the other end side of the half-curled portion, and a portion where the engaging portion is engaged with the engaged portion so that the predetermined torque can be obtained. The first stopper is used as a fulcrum based on the principle of leverage so that the inner surfaces of the first half-curled portion and the second half-curled portion come into contact with the outer peripheral surface of the rotating shaft portion. The tilt hinge device according to claim 1, further comprising a tightening member that tightens the portion and the second fastening portion so as to approach each other.

[0010] Further, since the fastening member is a screw,
Tightening force can be easily adjusted. In addition, since the fastening member is a rivet, a predetermined fastening force can be easily and reliably obtained.

Further, since the engaging portion is a protruding portion and the engaged portion is a hole, it can be manufactured accurately and easily by press molding, and both can be suitably engaged with a simple configuration.

Further, according to the present invention, the tilt hinge device described above is mounted between a device main body of a precision instrument, which is between the first member and the second member, and a display device or the like. There is also a precision instrument using a tilt hinge device characterized by the following.

[0013]

Preferred embodiments of the present invention will be described below in detail with reference to the accompanying drawings. FIG. 1 is a perspective view of an embodiment of the tilt hinge device according to the present invention as viewed from the back side, and FIG. 2 is a perspective view of the embodiment of FIG. 1 as viewed from the front side. FIG. 3 is an exploded view of the embodiment of FIG. FIG. 4 is a perspective view showing a notebook personal computer equipped with the embodiment of FIG. The tilt hinge device 10 of the present embodiment is for opening and closing the display device 12 and holding the display device 12 at an arbitrary angle with respect to the device main body 14 of the notebook personal computer. It is widely available.

As shown in FIG. 4, the tilt hinge device 10
Is connected so that the first member, which is one of the device main body 14 and the display device 12, and the other second member can be relatively rotated. The first member may be the device main body 14 or the display device 12,
Correspondingly, the second member may be the display device 12 or the device body 14. And
The tilt hinge device 10 of the present embodiment includes a first member and a second member.
In order to provide an angle holding function for holding the member at an arbitrary angle, as shown in FIGS. 1 to 3, the cylindrical mounting shaft portion 16 and the first mounting portion 18 fixed to the first member are provided. And a bearing unit 20 having a bearing part 22 for bearing the rotating shaft part 16 and a second mounting part 28 fixed to the second member. Note that the first mounting portion 18 of the present embodiment is a portion that is continuous with the rotating shaft portion 16, and is an end portion in which both surfaces are formed flat and a hole 19 for mounting is formed. However, it goes without saying that the first mounting portion of the present invention can be set in various forms.

The bearing portion 22 of the bearing fitting unit 20 has a first half-curled portion 32 provided with an inner surface 32a having an arc-shaped cross section that comes into contact with the outer peripheral surface 16a of the rotating shaft portion 16. Piece 30, a second bearing piece 40 having a second half-curled portion 42 provided with an inner surface 42 a having an arc-shaped cross section in contact with the outer peripheral surface 16 a of the rotating shaft 16, and a rotating shaft 15 The first bearing piece 30 and the second bearing piece 40 hold the rotating shaft 16 so that the first bearing piece 20 and the bearing fitting unit 20 can be relatively rotated by a predetermined torque. And holding means 24 for holding.

The inner surfaces 32a and 42a of the pair of half-curled portions 32 and 42 are basically formed symmetrically, and the conventional integral curl portion (see FIG. 8) is It can be said that it is divided into approximately half along the heart. In addition, although it is not required that the image is divided into two so as to be strictly symmetric, it is preferable that the image is equally divided from the viewpoint of symmetry.

A pair of half-curled portions 32, 4
The angle of each arc defining the arc-shaped inner surfaces 32a and 42a (the angle about the rotation axis) may be 180 degrees or less. In addition, the sum of the angles of the arcs of the inner surfaces 32a and 42a may be at least less than 360 degrees. Since the inner surfaces 32a and 42a are set for the purpose of increasing the contact area with the rotating shaft 16, the angle of the circular arc (the area of the inner surface) is excluded except for a gap for tightening. ) Should be set as large as possible.

Since the angle of the circular arc applied to each of the inner surfaces 32a and 42a is 180 degrees or less, it can be manufactured by a simple mold that is vertically divided. The fact that it can be manufactured in this way means that it can also be suitably manufactured using a progressive die. Therefore, a highly accurate product can be efficiently and reliably produced, and a highly reliable tilt hinge device 10 can be provided at low cost. That is, a conventional integrated curl portion (FIG. 8)
Unlike the first embodiment, the first bearing piece 30 and the second bearing piece 40 can be suitably formed by press working. For this reason, the R-shape (the inner surface 32 having an arc-shaped cross section) of each of the bearing pieces 30 and 40 wrapping the outer peripheral surface of the rotating shaft portion 16.
a, 42a) can be easily processed, and the dimensional accuracy of the radius can be improved. By improving the dimensional accuracy of R as described above, it is possible to reduce the variation of the rotating torque applied to the rotating shaft 15 and the bearing fitting unit 20. In addition, since progressive press working is possible without requiring a complicated mold, the manufacturing cost of parts can be reduced.

Also, a pair of inner surfaces 32a and 4
Since the sum of the angles of the arcs related to 2a is less than 360 degrees, the first bearing piece 30 and the second bearing piece 40 face each other and are tightened in a state where the rotating shaft portion 16 is sandwiched from both sides. Gap can be obtained. By utilizing this gap, as will be described later, the rigidity and elasticity of the material of the first bearing piece 30 and the second bearing piece 40 (metal material in the present embodiment) are preferably used, and the A tightened state can be obtained.

The pinching and holding means of the present embodiment is provided on one end side of the first half-curled portion 32 of the first bearing piece 30, and is provided with an engaged portion of the second bearing piece 40. Hole 4
4) an engaging portion (projecting portion 34) to be engaged with the first portion;
The first fixing portion 36 provided at the other end of the half-curled portion 32 of the second half and the second bearing piece 40 are provided at one end of the second half-curled portion 42 with the first A predetermined torque is applied to the engaged portion 44 engaged with the engaging portion 34 of the bearing piece 30 and the second fastening portion 46 provided at the other end of the second half-curled portion 42. In order to obtain the fulcrum 26, a portion where the engaging portion 34 is engaged with the engaged portion 44 is defined as a fulcrum 26,
According to the principle of leverage, the inner surfaces 32a, 42a of the first half-curled portion 32 and the second half-curled portion 42
And a fastening member (screw 50) for fastening the first fastening portion 36 and the second fastening portion 46 close to each other so as to come into contact with the outer peripheral surface 16a. In this manner, in the state of being tightened by the leverage principle, each inner surface 32a,
The point of action 42a is the point of action, and the first fastening part 36 and the second fastening part 46 are power points.

In this embodiment, the engaging portion is the protruding portion 34, and the engaged portion is the hole 44. More specifically, the protruding portion 34 extends from one end of the first half-curled portion 32 (a side 33 along the rotation axis) in a radial direction centered on the rotation axis. It is formed so as to protrude outward. The hole 44 extends from one end side (the side 43 along the rotation axis) of the second half-curled portion 42 in a direction intersecting radially around the rotation axis (this embodiment). (In the direction orthogonal to the direction in FIG. 2). To be precise, at the side portion 43 of the second half-curled portion 42, substantially the thickness is extended radially outward, and the end is bent to form the end portion 45. Thereby, the inner surfaces 32a, 42a of the first half-curled portion 32 and the second half-curled portion 42 are located on concentric circles,
The rotation shaft 16 can be suitably contacted. The protruding portion 34 and the hole 44 are engaged with each other in a kind of loose fitting state so that they can be angularly displaced in a direction perpendicular to the rotation axis while being fitted to each other. The protrusion 34 and the hole 4 thus formed
According to No. 4, it is possible to accurately and easily manufacture by press molding with a simple configuration, and both can be suitably engaged.

The engaging portion of the first bearing piece 30 and the engaged portion of the second bearing piece 40 need only be relatively engaged with each other. Then, the hole 44 may be provided in the first bearing piece 30. The means by which the first bearing piece 30 and the second bearing piece 40 are engaged is not limited to the protrusion 34 and the hole 44. For example, they may be hooked to each other.
They may be engaged with each other via another member for engagement.

In this embodiment, the state is described in which one engaging portion (projecting portion 34) and one engaged portion (hole 44) are formed. However, a plurality of engaging portions (projecting portions 34) may be provided. Of course. In particular, in order to obtain a higher rotation torque, when the outer diameter is limited, it is necessary to form the motor so as to be longer in the direction along the rotation axis. In this case, according to the plurality of protrusions 34 and the plurality of holes 44, the tightening force can be uniformly distributed, and a more stable and large turning torque can be obtained.

In this embodiment, the fastening member is a screw 50. Specifically, the first bearing piece 30
An insertion hole 37 is formed in the fixing portion 36 of the second bearing member 40, and a female screw portion 47 which is tapped on the second fixing portion 46 of the second bearing piece 40 is formed. The male screw portion of the screw 50 as a bolt is inserted into the insertion hole 37, screwed into the female screw portion 47, and tightened. According to this,
By adjusting the tightening force of the screw 50, the first bearing piece 30
And the second bearing piece 40 can easily adjust the tightening force on the rotating shaft 16.

Further, as described above, according to the first bearing piece 30 and the second bearing piece 40, the lever is tightened according to the principle of leverage. For this reason, the rotation shaft 16 can be suitably tightened by appropriate rigidity of the first bearing piece 30 and the second bearing piece 40. In addition, in a state where the appropriate elasticity of the first bearing piece 30 and the second bearing piece 40 is suitably used, the rotating shaft 16 can be clamped by a suitable tightening force. According to the appropriate elasticity (springiness), an appropriate holding function and a function of appropriately permitting the rotation of the rotation shaft 16 are generated. Therefore, a stable rotation torque can be obtained. That is, even if the sliding surface is worn, the elastic force ensures that the inner surfaces 32a and 42a are in contact with the outer peripheral surface 16a of the rotating shaft portion 16, thereby preventing the rotating torque from dropping at once. it can. For this reason, the rotation torque can be suitably maintained within a certain range. In addition, the insertion hole 3
7 and the female screw portion 47 may be provided relatively, and an insertion hole may be formed in the second fixing portion 46, and a female screw portion may be formed in the first fixing portion 36. .

Further, the fastening member of the present invention is not limited to the screw 50 (screw) as described above, and the rivet 60 is used as in the other embodiments according to the present invention shown in FIGS.
May be. This embodiment differs from the embodiment shown in FIGS. 1 to 3 in that the fastening member is a rivet 60. Thus, the first bearing piece 3 is formed by caulking using the rivet 60.
By fixing the second bearing piece 40 to the zero, a predetermined tightening force can be easily and reliably obtained. A constant tightening force can be suitably maintained without being loosened by a mechanism such as the screw 50.

Further, the fastening member is composed of the first bearing piece 30 and the second bearing piece 30.
The first bearing piece 30 and the second bearing piece 30 are formed integrally with at least one of the bearing pieces 40, for example, by caulking.
It is also possible to use a structure in which the bearing piece 40 is stopped. According to this, it is not necessary to provide the fastening member separately, and the manufacturing cost can be reduced.

In the present embodiment, the second mounting portion 28
Are formed integrally following the second fastening portion 46 of the second bearing piece 40. Reference numeral 29 denotes a hole for attachment. The present invention is not limited to this, and may be formed following the first fixing portion 36 of the first bearing piece 30, or may be formed by the first bearing piece 30 and the second bearing. It may be provided on both of the pieces 40. Also,
Needless to say, the form can be variously set.

The tilt hinge device 1 described above
Each member constituting 0 may be formed of a metal (for example, stainless steel) having excellent strength and abrasion resistance. However, depending on the specification, it is a matter of course that a material that can withstand use can be constituted by a molding material that is not formed by press molding or an appropriate resin material. In addition, by interposing lubricating oil in the sliding portion, it is needless to say that the rotation torque can be stabilized and the durability can be improved.

In the present invention, the tilt hinge device 10 described above includes a device main body 14 of a precision instrument and a display device 12 between the first member and the second member.
And the like, and can be suitably used.
The tilt hinge device 10 can be suitably used not only for OA equipment but also for other precision equipment which requires a constant rotation torque. According to this, it is possible to suitably cope with thinning of precision equipment. As described above, the present invention has been described in various ways with reference to preferred embodiments. However, the present invention is not limited to these embodiments.
Of course, many modifications can be made without departing from the spirit of the invention.

[0031]

According to the tilt hinge device of the present invention, the bearing portion of the bearing fitting unit includes the first bearing piece having the first half-curled portion and the second bearing portion having the second half-curled portion. 2 and a pinching and holding means for holding the rotating shaft in a state sandwiched therebetween. For this reason, size reduction in the direction orthogonal to the rotation axis is possible. In addition, since it is in a form that can be suitably manufactured in the pressing process, it can be formed with high precision so as to obtain a uniform and stable rotation torque, and also has a remarkable effect that it can be efficiently produced.

[Brief description of the drawings]

FIG. 1 is a perspective view showing one embodiment of a tilt hinge device according to the present invention.

FIG. 2 is a perspective view of the embodiment of FIG. 1 as viewed from the other side.

FIG. 3 is an exploded view of the embodiment of FIG.

FIG. 4 is a perspective view showing an example using a tilt hinge device.

FIG. 5 is a perspective view showing another embodiment of the tilt hinge device according to the present invention.

FIG. 6 is an exploded view of the embodiment of FIG.

FIG. 7 is an exploded view illustrating a conventional technique.

FIG. 8 is a cross-sectional view illustrating a conventional technique.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Tilt hinge device 12 Display device 14 Device main body 15 Rotating shaft body 16 Rotating shaft portion 16a Outer peripheral surface 18 First mounting portion 20 Bearing unit 22 Bearing portion 24 Clamping holding means 26 Support point 28 Second mounting portion 30 First 1 bearing piece 32 first half-curled portion 32a inner surface 34 projecting portion 36 first fastening portion 40 second bearing piece 42 second half-shaped curled portion 42a inner surface 44 hole 46 second fastening Part 50 screw 60 rivet

Claims (6)

[Claims] 1. An angle holding function for connecting a first member and a second member so as to be relatively rotatable and holding the first member and the second member at an arbitrary angle. A rotating shaft body having a cylindrical rotating shaft portion and a first mounting portion fixed to the first member so as to be provided; a bearing portion for bearing the rotating shaft portion; and the second member And a bearing unit having a second mounting unit fixed to the tilting hinge unit, wherein the bearing unit of the bearing unit has an inner surface having an arc-shaped cross section that contacts an outer peripheral surface of the rotation shaft unit. A first bearing piece provided with the first half-curled portion provided, and a second half-curled portion provided with an arc-shaped inner surface in contact with the outer peripheral surface of the rotating shaft portion. 2 the bearing piece, the rotating shaft body and the bearing fitting unit are relatively predetermined torque. Therefore, a pinching and holding means for holding the rotary shaft portion in a state of being sandwiched between the first bearing piece and the second bearing piece so as to be rotatable is provided. Tilt hinge device. 2. The pinching and holding means, provided on one end of the first half-curled portion of the first bearing piece, is engaged with an engaged portion of the second bearing piece. An engaging portion, a first fixing portion provided on the other end side of the first half-curled portion, and one end of the second half-curled portion in the second bearing piece. An engaged portion provided on the other side and engaged with the engaging portion of the first bearing piece; and a second fastening portion provided on the other end side of the second half-curled portion; In order to obtain the predetermined torque, a portion where the engaging portion is engaged with the engaged portion is used as a fulcrum, and the first half-curled portion and the second In order for the inner surface of the half-curled portion to contact the outer peripheral surface of the rotating shaft portion,
2. The tilt hinge device according to claim 1, further comprising: a tightening member that tightens the first fastening portion and the second fastening portion so as to approach each other. 3. 3. The tilt hinge device according to claim 2, wherein the fastening member is a screw. 4. The tilt hinge device according to claim 2, wherein the fastening member is a rivet. 5. The tilt hinge device according to claim 2, wherein the engaging portion is a protruding portion, and the engaged portion is a hole. 6. The tilt hinge device according to claim 1, wherein the tilt hinge device is between the first member and the second member and between a device main body of a precision instrument and a display device or the like. A precision device using a tilt hinge device, which is attached to a device.