KR200392473Y1 - Hinge - Google Patents

Abstract

The present invention relates to a hinge device, and a main purpose of the present invention is to provide a hinge device having a stopper function so that the display unit of the notebook does not open any more when the display unit is opened at a predetermined angle with respect to the base unit.

The present invention for achieving the above object, among a plurality of hinge structures constituting the hinge device, forming a stopper 55 on the fixed cam 50, the rotating cam 60 corresponding to the stopper 50 This is achieved by forming the stopper guide cam surface 65.

Description

Hinge Device {Hinge}

The present invention relates to a hinge device, and more specifically, to avoid the mutual latch in the state in which the display unit is fully folded with respect to the base unit by the cam action while eliminating the separate latch device, the opening and closing phenomenon of the opening and closing at a certain angle And a stopper function having a stopper function so that the display unit is no longer opened in a state of being opened at a predetermined angle with respect to the base unit.

In recent years, with the rapid development of information and communication, computers have become almost essential in daily life.

Recently, these computers are almost essential to offices, schools, and homes. Unlike desk top personal computers installed in such a limited space, laptop computers are easy to carry and use anytime, anywhere. The spread of is spreading rapidly.

The notebook computer includes a storage device such as a main board, a CPU, various chipsets, a hard disk, data input means such as a keyboard and a touch pad, a battery for supplying power, and a LAN card for an online function. A base unit configured to include; It consists of a display unit including a liquid crystal display device for displaying a variety of screens by the operation and operation of the base unit, one end of the display unit is coupled to a hinge to the base unit is configured to fold or open each other .

In the notebook computer as described above, the hinge unit of the base unit and the display unit is disclosed in various configurations. In most cases, the display unit is rotated with a constant external force with respect to the base unit, but free rotation does not occur. It is configured to maintain the angle.

However, even if the conventional hinge device is configured such that the display unit does not rotate freely with respect to the base unit, when carrying the base unit and the display unit in a folded state, The center of gravity is directed downwards, and since the weight of the base unit or the display unit is greater than the free rotation prevention force of the hinge device, the gap is caused by the free fall of the base unit or the display unit.

Thus, in order to prevent the mutual expansion in the folded state of the base unit and the display unit is generally provided with a latch device as a locking means.

That is, a latch device for holding the base unit and the display unit in a state where the display unit is folded with respect to the base unit is provided.

However, in the case of a notebook computer provided with a latch device as described above, there is an inconvenient problem in that the latch device must be unlocked when the display unit is rotated with respect to the base unit to be opened at a predetermined angle. Due to the additional configuration of the notebook computer was also a problem that provides a reason for being expensive.

Accordingly, the applicant of the present application focuses on the above-mentioned problems, and completely eliminates the latch unit for preventing the display unit from being folded while the display unit is folded with respect to the base unit. It has applied for a hinge device of a notebook computer (Korean Patent Application No. 2004-33837) which prevents mutual gaps in a folded state and causes opening and closing clicks at a predetermined angle.

However, the above-mentioned 'Hinging device of a laptop computer' of Korean Patent Application No. 2004-33837 prevents a mutual opening in a state where the display unit is completely folded with respect to the base unit by a cam action while eliminating a separate latch device. Although the click phenomenon of opening and closing occurs at a certain angle, there is a problem in that the display unit is fully flipped back when a certain force is applied while the display unit is opened about 170 degrees with respect to the base unit.

That is, in the state where the display unit is opened about 170 degrees with respect to the base unit, the center of the first cam of the rotating cam is hung on the stepped portion of the projecting slope of the fixed cam, and thus has a stopper function to some extent. Only by the stopper function, when the user applies more than a certain amount of force is clicked on the back completely, there was a problem that does not satisfy the customer satisfaction.

Accordingly, the present invention has been devised in view of the above-described problems, and while the display unit is completely folded with respect to the base unit by the cam action while eliminating a separate latch device, the mutual gap is prevented and at a certain angle. It is an object of the present invention to provide a hinge device having a stopper function so that a click phenomenon of closing occurs and the display unit is no longer opened with a predetermined angle with respect to the base unit.

The present invention for achieving the above object is a shaft having a bracket fixed to one side of the frame of the display unit, and is fixed to one side of the base unit so that the shaft is rotatable to maintain the fixed during the rotation of the display unit In a hinge device comprising a system bracket and a hinge structure consisting of a fixed cam, a rotating cam, a plurality of leaf springs, a guide washer and the like sequentially coupled to the shaft, the fixed cam is interlocked according to the rotation of the shaft. A circular through hole is formed in the center thereof, and a first cam groove and a second cam groove are formed to face each other with respect to the through hole, and the first cam surface and the second cam groove are opposed to each other even between the first cam groove and the second cam groove. 2 cam surface is formed, the one side of the first cam surface is formed with a stopper protruding further by a predetermined height than the first cam surface .; The rotating cam has a square groove formed at a center thereof so as to be interlocked according to the rotation of the shaft, and the first cam surface and the second cam surface respectively corresponding to the first cam groove and the second cam groove of the fixed cam, respectively, around the square groove. Are formed to face each other, and a first cam groove and a second cam groove corresponding to the first cam surface and the second cam surface of the fixed cam are formed between the first cam surface and the second cam surface, respectively. And a stopper guide cam surface corresponding to the stopper by a circumferential circumference of a predetermined length in an inner direction of the second cam surface, the first cam groove, and the second cam groove.

In this case, the first cam groove and the second cam groove of the fixed cam are connected to the first cam surface and the second cam surface with the inclined surfaces inclined upward at a predetermined angle, respectively.

In addition, the stopper of the fixed cam is characterized in that it has a diameter by a position spaced apart by a predetermined interval from the through outer periphery of the fixed cam into the outer circumference of the fixed cam.

On the other hand, the stopper guide cam surface of the rotating cam is characterized by having a diameter corresponding to the diameter of the stopper.

In addition, the stopper guide cam surface of the rotating cam is characterized in that extending from the first cam groove of the rotating cam to a part of the second cam surface and the second cam groove of the rotating cam.

The stopper guide cam surface of the pivoting cam has a stopper guide first inclined surface, a stopper guide first cam groove extending from the stopper guide first inclined surface, and the stopper guide first cam groove and the stopper guide second inclined surface. And a stopper guide second cam groove having an extended stopper guide first cam surface, and a sidewall extending between the stopper guide first cam surface and the stopper guide third inclined surface to hold the stopper of the fixed cam.

In addition, the stopper guide third inclined surface and the stopper guide second cam groove is characterized in that the same surface as the stopper guide first cam surface.

In addition, when the display unit is fully folded with respect to the base unit and the angle is 0 degrees, the inclined surfaces of the rotating cam are interlocked with the inclined surfaces of the fixed cam.

In addition, when the display unit rotates with respect to the base unit at an angle of about 150 degrees, the stopper of the fixed cam comes into contact with the end of the second cam groove of the stopper guide of the rotating cam, so that the angle rotation is no longer performed. It is done.

On the other hand, when the display unit is closed with respect to the base unit and the angle is rotated to about 5 degrees, the click occurs when the inclined surfaces of the rotating cam is in contact with the inclined surfaces of the fixed cam.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 is a perspective view showing a relationship in which the hinge device according to the present invention is mounted on a notebook computer, Figure 2 is an enlarged view showing a coupling relationship of the main portion in FIG.

As shown, the notebook hinge device according to the present invention, the shaft 20 is formed integrally at one end of the bracket 12 for fixing to the frame of the display unit, the shaft 20 and the space washer ( 24 and the system bracket 30 which is rotatably coupled to each other and fixedly coupled to one side of the frame of the base unit 2, and a hinge structure sequentially coupled to one side of the shaft 20. have.

The shaft 20 is integrally formed around the middle of the engaging plate 22. Although not shown in detail, the shaft 20 forms a cylindrical portion from one surface to a predetermined length, and both sides from the cylindrical portion to a predetermined length This opposing planar square is formed, and it consists of a screw part from this rectangular part to a predetermined length.

Meanwhile, the system bracket 30 coupled to the shaft 20 includes a first bracket 32 having a through hole formed to be rotatably inserted into a cylindrical portion of the shaft 20, and the first bracket 32. The second bracket 34 formed at right angles to one end of the second bracket 34 and extending from one surface of the second bracket 34 are formed of a fem nut 40 fixed to the frame of the base unit 2.

The hinge structure, as shown in Figure 2 to 5, the fixed cam 50 is inserted into the cylindrical portion of the shaft 20 and fixed to the first bracket 32 of the system bracket 30, and The cam surface of the fixed cam 50 and the cam surface are rotated in contact with each other by being inserted into the square portion of the shaft 20, and the rotation cam 60 interlocked with the shaft 20, and also the square shape of the shaft 20. And a plurality of leaf springs 70 and guide washers 80 inserted into the portion, and a nut 90 fastened to the threaded portion of the shaft 20.

One end of the fixing cam 50 is fixedly coupled to the first bracket 32 of the system bracket 30.

Therefore, the through hole formed in the first bracket 32 of the system bracket 30 is fitted from the end of the shaft 2 so that one surface of the first bracket 32 is one surface of the engaging plate 22 of the shaft 20. And the fixed cam 50, the rotation cam 60, the plurality of leaf springs 70, the guide washer 80 in order to be in close contact with each other, and finally, the nut 90 is inserted into the shaft. What is necessary is just to fasten with the screw part of (20).

At this time, a portion protruding from one end of the fixing cam 50 fits into the fixing groove formed in the first bracket 32 of the system shaft 30, and the nut 90 that is finally fastened sets the tightening torque. After adjusting to riveting, the final assembly is finished.

On the other hand, by fitting the through-hole formed in the first bracket 32 of the system bracket 30 from the end of the shaft 2, one surface of the first bracket 32 is one surface of the engaging plate 22 of the shaft 20 In a state in which it is in close contact with the fixed cam 50, the rotation cam 60, a plurality of leaf springs 70, guide washers 80 are sequentially inserted, and then immediately assembled by riveting immediately without a nut You can also finish.

The fem nut 40 formed on one surface of the second bracket 34 of the system bracket 30 is fixedly coupled to the frame of the base unit 2 while the assembly is completed as described above, and the bracket 12 is a display unit ( It may be fixed to the frame side of 2).

Referring to the operation of the hinge device fastened to the notebook consisting of the configuration as described above are as follows.

When the display unit 4 is angularly rotated around the base unit 2 while the base unit 2 lies horizontally on the floor, the bracket 12 on which the frame of the display unit 4 is fixed is rotated. While being fixed to the bracket 12 and the shaft 20 is interlocked to rotate.

At this time, the system bracket 30 maintains a fixed position because the fem nut 40 is fixedly coupled to the frame of the base unit 2, and also the first bracket 32 of the system bracket 30. And a fixed cam 50 having one end fixedly coupled to the shaft 20 to maintain a fixed state without being rotated in conjunction with the shaft 20.

That is, the first bracket 32, the fixed cam 50, the rotating cam 60, the plurality of leaf springs 70, the guide washer 80 of the system bracket 30 sequentially fastened to the shaft 20 And the system shaft 30 and the fixed cam 50 of the nut 90 remain fixed, and the remaining rotation cam 60, the plurality of leaf springs 70, the guide washer 80 and the nut ( Only 90 will rotate in conjunction with the shaft (20).

The reason is that, as described above, the through hole formed in the first bracket 32 of the system bracket 30 and the through hole 51 of the fixing cam 50 have a circular shape, and thus the cylindrical portion of the shaft 20 has a circular shape. This is because, by being inserted, the shaft 20 does not interlock while sliding.

On the other hand, the through hole of the rotation cam 60, the plurality of leaf springs 70 and the guide washer 80 is formed as a square hole corresponding to the square portion of the shaft 20, bar of the shaft 20 Rotating in conjunction with the rotation, the nut 90 is also coupled with the screw portion of the shaft 20 is also rotated in conjunction with the shaft 20.

On the other hand, Figure 3 is a plan view for showing the cam surface of the fixed cam and the rotating cam, Figure 4 is a perspective view of Figure 3, Figure 5 is a perspective view of the state as shown in FIG.

6A, B, and C are diagrams showing curves of the cam surface of the fixed cam and the rotating cam and the stopper guide cam surface of the rotating cam.

As shown in the drawing, the cam surface of the fixed cam 50 has the first cam groove 52a and the second cam groove 52b extending by a predetermined angle so as to face each other with the through hole 51 therebetween. Between the first cam groove 52a and the second cam groove 52b, the first cam surface 53a and the first inclined first, second, third, and fourth slopes 54a, 54b, 54c, and 54d are interposed therebetween. The second cam surface 53b is formed.

That is, the first cam groove 52a extends from one side of the first cam surface 53a with the first inclined surface 54a therebetween, and the second inclined surface 54b is interposed from one side of the first cam groove 52a. The second cam surface 53b is formed to extend, and the second cam groove 52b is formed to extend between the third inclined surface 54c from one side of the second cam surface 53b and the second cam groove 52b. The first cam surface 53a extends in the circumferential direction again with the fourth inclined surface 54d therebetween.

The first cam groove 52a, the second cam groove 52b, the first cam surface 53a, and the second cam surface 53b form the same plane, respectively, and form the same plane from the outer circumference to the outer circumference of the through hole 51. .

In addition, the first cam surface 53a and the first cam groove 52a forming a boundary between the first cam surface 53a to a predetermined portion (approximately about the center portion of the first cam surface) of the first cam surface 53a. The stopper 55 which protrudes more than one cam surface 53a is formed.

The stopper 55 has a diameter from an outer circumference of the through hole 51 of the fixed cam 50 to an intermediate point between the outer circumference of the through hole 51 and the outer circumference of the fixed cam 50.

The height and diameter of the stopper 55 correspond to the depth and diameter of the stopper guide cam surface of the rotating cam, which will be described later.

On the other hand, the cam surface of the rotating cam 60, the first cam groove 52a and the second cam groove 52b of the fixed cam 50, the first cam surface 62a and the second cam surface 62b are formed. In addition, a first cam groove 63a and a second cam groove 63b corresponding to the first cam surface 53a and the second cam surface 53b of the fixed cam 50 are formed.

That is, the first cam surface 62a, the second cam surface 62b, the first cam groove 63a, and the second cam groove 63b of the rotation cam 60 are respectively the first cam groove 52a of the fixed cam 50. And the second cam groove 52b, the first cam surface 53a, and the second cam surface 53b, respectively.

Thus, like the fixed cam 50, the first cam surface 62a extends from the one side of the first cam groove 63a with the first cam surface 62a extending therebetween. The second cam groove 63b extends from one side of the second cam groove 63b, and the second cam surface 63c extends from one side of the second cam groove 63b. 62b is extended and the 1st cam groove 63a is extended in the circumferential direction again with the 4th inclined surface 64d from one side of the 2nd cam surface 62b.

Therefore, the first inclined plane 64a, the second inclined plane 64b, the third inclined plane 64c, and the fourth inclined plane 64d of the rotating cam 60 are the first inclined plane 54a of the fixed cam 50. And the second inclined plane 54b, the third inclined plane 54c, and the fourth inclined plane 54d, respectively.

On the other hand, in the rotation cam 60, the second cam groove (63b) has a diameter extending in the same plane from the outer circumference to the outer circumference of the square groove (61), respectively.

However, only a portion of the first cam groove 63a, the second cam surface 62b, and the second cam groove 63b from the first inclined surface 64a to the square groove 61 from the outer circumference of the rotation cam 60 by a predetermined distance. In this case, the diameter is a diameter corresponding to the diameter of the fixed cam 50 except for the diameter of the stopper 55 from the diameter of the first cam surface 53a.

Accordingly, the stopper guide is recessed by a depth corresponding to the height of the stopper 55 in a portion of the first cam groove 63a, the second cam surface 62b, and the second cam groove 63b from the first inclined surface 64a. The cam surface 65 is formed.

As described above, the stopper guide cam surface 65 has a square groove 61 formed from an inner circumference of a portion of the first cam groove 63a, the second cam surface 62b and the second cam groove 63b from the first inclined surface 64a. It has a diameter up to the outer circumference, and its circumference is about 220 degrees.

On the stopper guide cam surface 65, a stopper guide first inclined surface 66a is formed at a position radially collinear with the first inclined surface 64a and the central axis, and the stopper guide from the stopper guide first inclined surface 66a. The first cam groove 65a extends in the circumferential direction, and the stopper guide first cam surface 65b extends from one side of the stopper guide first cam groove 65a with the stopper guide second inclined surface 66b interposed therebetween. The stopper guide second cam groove 65c extends from one side of the stopper guide first cam surface 65b with the stopper guide third inclined surface 66c therebetween.

On the stopper guide cam surface 65, the stopper guide first cam groove 65a is located radially on the same line with the first cam groove 63a of the pivoting cam 60 in a radial direction, and the stopper guide second inclined surface 66b. Corresponds to the fourth inclined surface 64d of the rotational cam 60, the stopper guide first cam surface 65b corresponds to the second cam surface 62b of the rotational cam 60, and the stopper guide third inclined surface 66c. Is corresponding to the third inclined surface 64c of the rotation cam 60, the stopper guide second cam groove 65c corresponds to a part of the second cam groove 63b of the rotation cam 60.

In addition, the stopper guide first inclined surface 66a corresponds to the first inclined surface 64a of the rotation cam 60, respectively.

By the way, in the said stopper guide cam surface 65, the stopper guide 3rd inclined surface 66c and the stopper guide 2nd cam groove 65c may be formed in the same surface as the said stopper guide 1st cam surface 65b.

Referring to the relationship in which the display unit of the notebook computer is rotated in accordance with the engagement of the fixed cam 50 and the rotational cam 60 having the above configuration as follows.

For reference, as the cam surface of the fixed cam and the cam surface of the rotating cam are in contact with each other, to be expressed as shown, the right side of the rotating cam should be engaged with the left side of the fixed cam, but due to the structural complexity of the fixed cam, Note that the drawing is shown assuming that the left side of the rotating cam is engaged with the left side.

First, as described above, when the cam surface of the rotating cam 60 is brought into contact with the cam surface of the fixed cam 50, the cam surfaces and the cam grooves correspond to each other.

That is, the first cam surface 62a of the rotating cam 60 is in the first cam groove 52a of the fixed cam 50, and the second cam groove 52b is in the second cam groove 52b of the fixed cam 50. The cam surface 62b has the first cam groove 63a of the rotation cam 60 at the first cam surface 53a of the fixed cam 50, and the rotation cam 60 at the second cam surface 53b of the fixed cam 50. The second cam grooves (63b) of the corresponding to each other, the engagement is made to each other.

Of course, in this case, the first, second, third, and fourth slopes 54a, 54b, 54c, and 54d of the fixed cam 50 may include the first, second, third, and fourth of the rotation cam 60. The inclined surfaces 64a, 64b, 64c, and 64d respectively correspond to each other.

As described above, in the state where the fixed cam 50 and the rotating cam 60 are completely engaged, the stopper 55 of the fixed cam 50 is the stopper guide first cam groove of the stopper guide cam surface 65 of the rotating cam 60. 65a and stopper guide 1st inclination surface 66a are located in the vicinity.

However, as described above, the cam grooves 52a and 52b and the cam surfaces 53a and 53b of the fixed cam 50 and the cam surfaces 62a and 62b and the cam grooves 63a and 63b of the pivoting cam 60 coincide with each other. There may be some play in the engaged state.

That is, the base unit 2 of the notebook and the display unit 4 are completely folded to form a zero degree opening angle of the cam grooves 52a and 52b and the cam surfaces 53a and 53b of the fixed cam 50. When the cam surfaces 62a and 62b and the cam grooves 63a and 63b of the rotational cam 60 are completely engaged with each other, the cam grooves 52a and 52b of the fixed cam 50 when the notebook is held upside down. And play may occur in a state where the cam surfaces 53a and 53b, the cam surfaces 62a and 62b of the pivoting cam 60 and the cam grooves 63a and 63b are engaged with each other, and thus the base unit 2 and the display are engaged. The unit 4 is somewhat fluid with the fully folded state.

Thus, the base unit 2 and the display unit 4 of the notebook are fully folded, that is, when the gap between the base unit 2 and the display unit 4 is 0 degrees so that the above play does not occur. As shown in FIG. 7, the inclined surfaces 64a, 64b, 64c, and 64d of the rotational cam 60 are engaged with the inclined surfaces 54a, 54b, 54c, and 54d of the fixed cam 50 to prevent mutual friction. By the continuous torque acting so that the display unit 4 does not have fluidity with respect to the base unit 2 unless an external force greater than this torque is applied.

That is, as described above, the cam grooves 52a and 52b of the fixed cam 50 and the cam surfaces 62a and 62b of the rotation cam 60 and the cam surfaces 53a and 53b of the fixed cam 50 rotate. Cam grooves 63a, 63b of cam 60, inclined surfaces 54a, 54b, 54c, 54d of fixed cam 50 and inclined surfaces 64a, 64b, 64c, 64d of rotating cam 60 The engaged state is adjusted so that the display unit 4 has an angle of approximately -11 degrees with respect to the base unit 2.

However, substantially the display unit 4 cannot be folded at a negative angle with respect to the base unit 2, so that the display unit 4 is completely folded with respect to the base unit 2, and its open angle is 0 degrees. 7, the inclined surfaces 64a, 64b, 64c, and 64d of the rotational cam 60 are engaged with the inclined surfaces 54a, 54b, 54c, and 54d of the fixed cam 50 by offset. The display unit 4 does not have fluidity with respect to the base unit 2 unless there is a continuous torque due to mutual friction and an external force greater than this torque is applied.

As such, when the display unit 4 is fully folded with respect to the base unit 2 and the display unit 4 is rotated upward by a force greater than the torque, the display unit 4 is rotated upward. The bracket 12 is rotated in conjunction with, so that the shaft 20 is rotated, thereby rotating the cam 60. Of course, in this case, the fixing cam 50 is fixedly coupled to the first bracket 32 of the system shaft 30 fixedly coupled to the frame of the base unit 2, thereby maintaining the fixed state.

Therefore, the rotating cam 60 is rotated with respect to the fixed cam 50, the cam surface (62a, 62b) of the rotating cam 60 is rotated along the cam surface (53a, 53b) of the fixed cam (50). The state is a state in which the display unit 4 is angularly rotated around the base unit 2, and as described above, the cam surfaces 62a and 62b of the rotation cam 60 are cam surfaces 53a and By rotating while pressing the 53b), the plurality of leaf springs 70 are in a compressed state. At this time, the display unit 4 does not freely rotate relative to the base unit 2 by the set torque. A fixed state is achieved at the point.

When the cam surfaces 62a and 62b of the rotation cam 60 are rotated while pressing the cam surfaces 52a and 52b of the fixed cam 50 according to the angular rotation of the display unit 4, the fixed cam 50 is rotated. The stopper 55 maintains a fixed position, at which time the stopper guide cam surface 65 of the rotation cam 60 does not catch the stopper 55.

That is, the depth of the stopper guide cam surface 65 of the pivoting cam 60 is formed as high as the height of the stopper 55, so that the rotational cam 60 rotates with respect to the fixed cam 50. This will not happen.

However, as described above, the stopper guide cam surface 65 is not formed by the entire circumferential length of the rotational cam 60, that is, 360 degrees, and extends only from the fourth inclined surface 64a to a part of the second cam groove 63b. When the one side wall of the stopper 55 comes into contact with the end of the stopper guide cam surface 65, that is, the sidewall of the stopper guide cam surface 65c from the stopper guide cam surface 65, that is, the rotation cam If it is in close contact with the cut side wall of the second cam groove (63b) of 60 no further rotation is made (see Fig. 9).

As the rotation cam 60 rotates as described above, the stopper guide 55 of the fixed cam 50 is formed on the stopper guide second cam groove 65c, which is the end of the stopper guide cam surface 65, that is, the cut sidewall of the second cam groove 63b. ) Is in a state where the display unit 4 is opened about 150 degrees with respect to the base unit 2.

When the display unit 4 is rotated with respect to the base unit 2 as described above, a click phenomenon occurs when the display unit 4 is about 5 degrees with respect to the base unit 2. To close.

That is, the cam surfaces 62a and 62b of the pivoting cams 60 are in contact with the cam surfaces 53a and 53b of the fixed cam 50 and then the inclined surfaces 64a, 64b, 64c and 64d of the rotational cam 60. When the plurality of leaf springs 70 are restored at the time when they ride the inclined surfaces 54a, 54b, 54c, 54d of the fixed cam 50, a click in a closed state is generated.

Of course, when the display unit 4 is completely folded with respect to the base unit 2 to achieve 0 degrees, the inclined surfaces 64a, 64b, 64c, and 64d of the rotation cam 60 are inclined surfaces of the fixed cam 50. (54a, 54b, 54c, 54d) is caught by the frictional force, and the locking state is not released unless the external force of a certain magnitude is applied by the generated torque.

For reference, the fixed cam 50 and the rotational cam 60 is likely to cause abrasion due to frequent friction, the well-known MIM technology (as a mixture of the sintering process in the plastic injection process and high surface roughness and It is desirable to increase the wear resistance improvement by using a cam (stainless steel) which can obtain dimensional accuracy and is suitable for mass production of a product having a complicated shape and is currently used in computers and electronic parts.

As described above, according to the hinge device of the present invention, even when the display unit is completely folded with respect to the base unit, the mutual gap is prevented due to the engagement action of the cam. It can be provided as well as a very useful effect of reducing the manufacturing cost.

In addition, when the display unit is opened and closed with respect to the base unit, a click phenomenon occurs at a predetermined angle, thereby improving the feeling of use.

In particular, when the display unit is rotated at an angle (about 150 degrees) with respect to the base unit, the display unit has a stopper function that prevents it from further opening, thereby preventing the display unit from completely falling backwards with respect to the base unit. There is a very useful effect that will provide improved product performance.

1 is a perspective view showing the relationship that the hinge device according to the present invention is mounted on a notebook computer

Figure 2 is an enlarged view showing the coupling relationship of the main portion in FIG.

Figure 3 is a front view showing a fixed cam and a rotating cam respectively applied to the hinge device according to the present invention.

4 is a perspective view of FIG.

FIG. 5 is a perspective view of a state of FIG. 4 viewed from another direction; FIG.

Figure 6a is a view showing a cam curve of the fixed cam in Figure 3 in the horizontal direction.

Figure 6b is a view showing the cam curve of the rotating cam in Figure 3 in the horizontal direction.

Figure 6c is a view showing a curve diagram of the stopper guide cam of the rotating cam in Figure 3 in the horizontal direction.

7 is a view showing a state in which the display unit is completely folded with respect to the base unit, and the positions of the fixed cam and the rotating cam in this state.

8 is a view showing a state in which a click occurs while the display unit is opened with respect to the base unit, and positions of the fixed cam and the rotating cam in this state.

9 is a view showing a state in which the display unit is no longer opened with respect to the base unit, and the positions of the fixed cam and the rotation cam in this state.

<Description of the symbols for the main parts of the drawings>

2: base unit 4: display unit

10: notebook computer 50: fixed cam

51: through hole 52a: the first cam home

52b: 2nd cam home 53a: 1st cam surface

53b: second cam surface 54a, 54b, 54c, 54d: inclined surface

55: stopper 60: rotation cam

61: square groove 62a: first cam surface

62b: second cam face 63a: first cam home

63b: 2nd cam groove 64a, 64b, 64c, 64d: slope

65: stopper guide cam surface 65a: stopper guide first cam groove

65b: stopper guide first cam surface 65c: stopper guide second cam groove

66a: stopper guide first inclined plane 66b: stopper guide second inclined plane

66c: stopper guide third slope

Claims (10)

A shaft having a bracket fixedly installed at one side of the frame of the display unit, a system bracket fixed to one side of the base unit so that the shaft is rotatable, and maintained fixed when the display unit is rotated, and fixed to the shaft sequentially In the hinge device comprising a hinge structure consisting of a cam, a rotating cam, a plurality of leaf springs, guide washers, etc., The fixed cam is formed with a circular through hole in the center thereof so as not to interlock according to the rotation of the shaft, the first cam groove and the second cam groove is formed to face each other with respect to the through hole, the first cam groove and the second cam groove A first cam surface and a second cam surface are formed between the cam grooves so as to face each other, and a stopper protruding further by a predetermined height than the first cam surface is formed at one side of the first cam surface; The rotating cam has a square groove formed at a center thereof so as to be interlocked according to the rotation of the shaft, and the first cam surface and the second cam surface respectively corresponding to the first cam groove and the second cam groove of the fixed cam, respectively, around the square groove. Are formed to face each other, and a first cam groove and a second cam groove corresponding to the first cam surface and the second cam surface of the fixed cam are formed between the first cam surface and the second cam surface, respectively. And a stopper guide cam surface corresponding to the stopper by a circumferential circumference of a predetermined length in the inward direction of the second cam surface, the first cam groove, and the second cam groove. The method of claim 1, And a first cam groove and a second cam groove of the fixed cam are connected to the first cam surface and the second cam surface with the inclined surfaces inclined upward at a predetermined angle therebetween. The method of claim 1, The stopper of the fixed cam, the hinge device characterized in that it has a diameter by a position spaced apart by a predetermined interval from the through outer periphery of the fixed cam to the inner circumference of the fixed cam. The method according to claim 1 or 3, The stopper guide cam surface of the pivoting cam has a diameter corresponding to the diameter of the stopper. The method of claim 1, The stopper guide cam surface of the pivoting cam extends from the first cam groove of the pivoting cam to a portion of the second cam surface and the second cam groove of the pivoting cam. The method according to claim 1 or 5, The stopper guide cam surface of the pivoting cam extends between a stopper guide first inclined surface, a stopper guide first cam groove extending from the stopper guide first inclined surface, and the stopper guide first cam groove and a stopper guide second inclined surface. And a stopper guide second cam groove having a stopper guide first cam surface and a sidewall extending between the stopper guide first cam surface and the stopper guide third inclined surface to hold the stopper of the fixed cam. The method of claim 6, And the stopper guide third inclined surface and the stopper guide second cam groove are flush with the stopper guide first cam surface. The method of claim 1, And when the display unit is completely folded with respect to the base unit and the angle is 0 degrees, the pivoting cam meshes the inclined surfaces with the inclined surfaces of the fixed cam. The method according to claim 1 or 8, When the display unit is rotated with respect to the base unit at an angle of about 150 degrees, the stopper of the fixed cam comes into contact with the end of the second cam groove of the stopper guide of the pivoting cam so that the angle rotation is no longer performed. Hinge device. The method according to claim 1 or 8, And the display unit is closed with respect to the base unit and rotates at an angle of about 5 degrees. When the inclined surfaces of the rotating cam are in contact with the inclined surfaces of the fixed cam, a click occurs.