JP4298908B2 - Biaxial hinge having a plurality of torque generators - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a biaxial hinge part used for a folding portion of a small electronic device such as a mobile phone, a notebook computer, an electronic notebook, a DVD monitor or the like.
[0002]
[Prior art]
Most conventional frictional torque generating mechanisms for the opening / closing shaft and the rotating shaft of the biaxial hinge have a structure in which a plate material is wound around a shaft and is pressed by a disc spring to generate rotational friction torque.
[0003]
9A and 9B show an example of a conventional biaxial hinge.
(A) is one in which a leaf spring 55 is wound around both ends of the opening / closing shaft 1, and a flat portion for device attachment is installed. (B) shows a plate spring 56 and a bracket 19 which are processed into a wave shape or the like at both ends of the opening / closing shaft 1 and are fixed to the shaft by the fixing flange 2. The rotary shaft 7 is installed through the central portion of the opening / closing shaft 1, and the rotational friction torque is generated by a method of pressing the leaf spring 9.
[0004]
The conventional product having a structure in which a leaf spring 55 is wound around an opening / closing shaft or a corrugated leaf spring 56 is pressed to generate a friction torque, the leaf spring 55 is deformed (hanging) while the opening / closing shaft 1 is rotated. As a result, there is a problem in durability because it is liable to loosen due to wear and wear damage of the pressure contact parts of the corrugated leaf spring 56. Therefore, the frictional torque is greatly reduced during use, and the device monitor does not stop at the predetermined opening / closing position. Such phenomena appear remarkably with time. Further, due to the reduction of the generated torque, there is a drawback that the operability and feeling are naturally worse than the original ones. In addition, the parts (a) and (b) generally use high-grade materials to prevent sag and wear, increase the cost because they are treated with heat treatment, and further, if the dimensional accuracy of the parts is poor, the characteristics will vary. The torque value is unstable, adjustment is necessary, and failure is likely to occur. Recent hinge parts emphasize operability and feeling when opening and closing and rotating compared to conventional characteristics, highly accurate torque value management, especially durability of several hundred thousand times, and further reduction in size and weight, There is a strong demand for cost reduction.
[0005]
[Problems to be solved by the invention]
The problem to be solved by the present invention is to provide a biaxial hinge part that can be made durable, downsized, and lightweight in mobile phones and notebook computers that are required to be smaller and lighter.
[0006]
[Means for solving the problems]
The invention described in claim 1
An opening / closing shaft having a quadrangular cross section, into which a flange installed at an end portion of the opening / closing shaft for connecting to the housing at both ends is inserted,
A single rotary cam for the open / close shaft that has a recess, a convex, and a flat surface that change the friction torque on both sides, loosely passing through the open / close shaft, and that has a hole for fixing the rotary shaft to the outer periphery;
The open / close shaft can slide and rotate integrally with the shaft, and has a concave, convex, and flat surface that changes friction torque on one surface, and the other surface is in contact with both surfaces of the open / close shaft rotary cam that has a flat surface. Two fixed cams for opening and closing shafts;
Two coil springs for biasing a repulsive force between the flange installed at the end of the opening and closing shaft and the fixed cam for the rotating shaft;
A rotary shaft having a square cross section, one end fitted to and fixed to the aforementioned rotary cam for the opening and closing shaft, and a stopper plate pivotally attached to the other end;
The rotating shaft loosely penetrates the rotating shaft at substantially both ends, and has a concave, convex, and flat surface that changes the friction torque on one surface, the other surface has a flat surface, and the outer periphery is connected to another housing. Two rotating cams for the rotating shaft,
2 that contacts with the rotary shaft rotary cam that can slide with the rotary shaft, rotates integrally with the shaft, has concave, convex, and flat surfaces that change friction torque on one side and has a flat surface on the other side. A fixed cam for the rotating shaft,
A biaxial hinge composed of a single coil spring that urges a repulsive force between the two fixed shaft cams. The open / close shaft rotates at two or more side surfaces so that the fixed cams come into contact with each other. And by arrange | positioning coaxially to each of a rotating shaft, a high sliding torque is obtained by the weak repulsive force of a coil spring.
[0008]
The invention described in claim 2 is inserted into an opening / closing shaft fixing bracket for connecting to a housing at both ends having a square cross section, has a hole penetrating the rotation shaft at one end, and the rotation shaft An opening / closing shaft having a concave, convex, and flat surface on the upper and lower sides of the shaft, and a concave, convex, slidable with the opening / closing shaft and rotating integrally with the shaft, changing the friction torque on one side, And two open / close shaft fixed cams having a flat surface and the other surface having a flat surface, one coil spring for biasing a repulsive force between the two open / close shaft fixed cams, and the open / close shaft A rotating shaft passing therethrough, two fixed cams for the rotating shaft positioned above and below the opening and closing shaft, which are slidable with the rotating shaft and rotate integrally with the shaft; A plurality of rotating shaft springs that urge the rotating shaft fixed cam from above and below, and a biasing force that urges the rotating shaft springs; The rotating shaft and the opening / closing shaft are arranged coaxially so that the fixed cam rotates and rotates on two side surfaces consisting of a stopper plate, a rotating shaft flange, and a bracket for connecting to another housing. Since the rotary shaft is structured to be loosened from one end of the shaft, the degree of freedom of attachment to the housing is improved.
[0009]
Invention of Claim 3 has two or more contact parts by the combination of the structure of the opening-and-closing axis | shaft described in Claim 1 or 2, and has two or more contact parts by the combination of the structure of a rotating shaft. As a result, a high sliding torque can be obtained by a weak repulsive force of the coil spring with respect to the set rotational torque value required for the rotating shaft and the opening / closing shaft, and the number of parts can be reduced and shortened for the rotating shaft.
[0010]
According to a fourth aspect of the present invention, the opening / closing angle restriction of the opening / closing shaft is integrally attached to a part of the opening / closing shaft rotation cam or the opening / closing shaft fixing cam, and the rotation angle restriction of the rotation shaft is further adjusted. The rotation of the rotary shaft and the open / close shaft can be stopped at an angle set by being integrally attached to a part of the fixed cam for the rotary shaft.
[0011]
According to a fifth aspect of the present invention, a part of the rotating shaft is formed into a cross section having a major axis and a minor axis, and the width of the opening is rotated by rotating the rotating shaft while contacting the cross section according to the opening / closing angle of the opening / closing shaft. A rotation restricting control plate having a width that inhibits rotation and a width that enables rotation of the rotating shaft, or forming the rotation restricting groove or the rotation restricting plate in a part of the housing side Thus, the rotation shaft can be rotated only within the set angle range of the opening and closing shaft.
[0012]
The invention described in claim 6 is characterized in that the cross-section of each shaft of the portion that slides with the fixed cam is a shaft processed into a cross-section other than a circle, whereby the rotary shaft and the fixed shaft slide. Since an arbitrary cross-sectional shape can be taken at a portion other than the portion, a function can be added.
[0013]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described below with reference to the drawings.
FIG. 1 is an exploded perspective view showing an example of the biaxial hinge of the present invention. The hinge of the open / close shaft has a square cross section, an open / close shaft 1 having pin 6 fixing holes at both ends, a flange 2 with a pin hole, a coil spring 3 having a ground surface polished, two convex portions on one side, and the other side being flat. Opening and closing shaft fixed cam 5 having a square through hole that can be fitted and slid with the opening and closing shaft 1 at the center, and the opening and closing shaft 1 passes through the center and the rotation shaft 1 can be rotated. Further, the opening and closing shaft rotating cam 4 has a hole 4-1 for fixing the rotating shaft 7 to the outer peripheral portion.
[0014]
The hinge of the rotary shaft has a protrusion 7-1 and a flange for fixing to the hole 4-1 of the rotary cam 4 for the opening / closing shaft at the end, the rotary shaft 7 having a square cross section, a bracket 8 for external attachment, one side The rotary shaft rotating cam 10 having a pressure contact surface having two recessed portions, the other surface being flat and the rotation shaft 7 passing through the center and having a rotatable hole, and a convex surface contacting the recessed portion of the rotating cam 10 on one surface. The rotary contact shaft and the other surface are flat, and the rotary shaft 7 is fitted in the center and has a rectangular through hole that can slide, the fixed shaft 11 for the rotary shaft, the coil spring 9 with the ground surface polished, and the rotary shaft 7. It comprises a stop plate 12 for fixing the assembly with caulking or the like.
[0015]
The fixing assembly of the rotary cam 4 for the open / close shaft and the rotary shaft 7 can be performed by screwing, welding, bonding or the like other than the method of press-fitting the protrusion 7-1 into the hole 4-1, as shown in the figure.
[0016]
In this example, the rotation and fixed cams for the opening / closing shaft 1 and the rotation shaft 7 have been described as having a recess and a protrusion on a part of the contact surface, but the uneven shape may be installed on any cam, Moreover, the uneven shape may be extended over the circumference. The recess may be a hole or a groove.
[0017]
The cross-sectional shape of the opening / closing / rotating shaft (1, 7) can be other than a circle. In this example, a square shape is shown over the entire length, but the fixed cams 5 and 11 are connected to the shafts 1 and 7, respectively. It is possible to use a shaft that is penetrated and slidable, but that has a part that cannot be rotated.
[0018]
FIG. 2 is an assembly diagram showing an embodiment of the present invention, in which the components of FIG. 1 are assembled. First, the hinge structure of the open / close shaft 1 is such that the closed shaft 1 having a square cross section rotates the open / close shaft rotary cam 4 having a contact surface for generating torque on both sides and the fixed cam 5 having two contact surfaces on one side. After pressing the cam and assembling two coil springs 3 with polished bearing surfaces, the fixing pin 6 is inserted while the coil spring is compressed by the flange 2 from both sides of the shaft. Assembling the open / close shaft hinge having the generator. The rotating shaft 7 has a hinge structure in which a rotating shaft 7 having a flange and having a quadrangular section and having a flange and a fixing protrusion 7-1 at the end is press-fitted into the fixing hole 4-1 of the rotating cam 4 for the opening and closing shaft, After fixing by welding, bracket 8, rotating cam 10, fixed cam 11, coil spring 9, and finally stopper plate 12 are crimped while the spring is compressed so that the torque generating surface of the rotating and fixed cam abuts, and two sets of torque It is set as the rotating shaft hinge which has a generation | occurrence | production part. The bracket 8 and the rotating cam 10 of the rotating shaft may be fixed so as to move together, or a common part may be used. In the figure, the rotary shaft case 14, the bracket 8, and the two rotary cams 10 are coupled to form a mechanism for transmitting rotational friction torque to the outside. The case 14 may be formed by molding a case or the like of a device to which a hinge is separately attached.
[0019]
FIG. 3 shows an opening / closing shaft hinge structure having a total of four torque generation portions, with the opening / closing shaft 1 shown in FIG. Is. At both ends of the opening / closing shaft 1, there are holes 18 for attaching and fixing the hinge to the device. The three rotating cams 4 are coupled by an opening / closing shaft case 13. A rotary shaft 7 fixed to the open / close shaft rotary cam 4 is provided with the same structure as the open / close shaft hinge shown in FIG. The bracket 8 is connected to the rotary shaft rotary cam 10 and installed.
[0020]
In FIG. 3, a rotation stopper mechanism for limiting the range of the rotation angle of the opening / closing shaft 1 and the rotation shaft 7 is also installed. The opening / closing shaft is a rotation stop protrusion 20 of the opening / closing shaft and a rotation stop flange 21 of the opening / closing shaft. The rotation shaft is implemented by a rotation stop flange 22 of the rotation shaft and a rotation stop protrusion 23 of the rotation shaft. The stop projection 23 of the rotating shaft may be installed on the bracket 8. As shown in FIG. 3, according to the present invention, it is possible to realize two or more sets of friction torque generating portions by contacting the rotating / fixing cams with the opening / closing shaft 1 and the rotating shaft 7 being in common.
[0021]
In FIG. 4, an opening / closing axis hinge is constituted by a fixed cam 5, a rotating cam 4, an opening / closing axis fixing bracket 19, and a flange 2 on both sides of the coil spring 3 through the opening / closing axis 1 having a square cross section. A rotating shaft mounting bracket 16 installed in combination with the rotating cam 5 is mounted. The rotating shaft mounting bracket 16 has a hole penetrating the rotating shaft 7 whose cross section is a D-cut surface, and a through hole 10-1 for providing a click mechanism in addition to the contact surface. use. The hinge of the rotary shaft has a leaf spring 9-1 which has a D-cut hole in the center on both sides of the coupling bracket 16 and is slidable with respect to the shaft 7 but has a convex portion that rotates integrally with the flange 17 and the E ring. 15, the leaf spring 9-1 is fixed in a compressed state, and the bracket 8 is installed at the end of the shaft. As shown in the figure, the present invention realizes two sets of friction torque generating portions by contacting the rotating / fixing cams with the opening / closing shaft 1 and the rotating shaft 7 being in common.
[0022]
The cross-sectional shape of the opening / closing / rotating shaft may be a shape other than a circle when the fixed cams 5, 10, 10-1 are slidable with the shaft and rotate integrally. It may be processed into a cross section other than a circle and the hole shape of the fixed cam may be matched.
[0023]
FIG. 4 shows a rotation restricting mechanism that is implemented by the rotation restricting control plate 24 of the rotating shaft and the rotation restricting shaft portion 25 of the rotating shaft installed on the opening / closing shaft. At the end of the rotary shaft 7 having a D-cut cross section, there is a parallelogram or elliptical shaft 25 having a long / short shaft cross section. The mechanism by which the rotation range of the rotating shaft 7 is regulated between the short shaft portion 25 is shown.
[0024]
FIG. 5 shows that the opening and closing shaft 1 having a square cross section is provided with two sets of torque generators on both sides of the coil spring at the one end of the opening and closing shaft hinge shown in FIG. The shaft 1 is provided with a rotating shaft hinge on the rotating shaft 7 at the other end of the shaft 1. The rotary shaft hinge has a convex portion and a flat plate and can slide on a rotary cam portion 10 installed as a common member on both sides of the opening / closing shaft 1 and a rotating shaft 7 installed through the opening / closing shaft 1, but with the shaft 7. The wave spring 9 and the rotating spacer 28 are inserted and assembled by the fixed flange 2 by abutting the recessed portion of the fixed cam 11 that rotates integrally. FIG. 5 shows that the opening / closing axis fixing bracket 19, the rotation axis bracket 8, the opening / closing axis stop mechanism parts 20, 21, and the rotation axis stop parts 22, 23 can be attached. As shown in FIG. 5, the present invention realizes two sets of friction torque generating portions by contacting the rotating / fixing cams with the opening / closing shaft 1 and the rotating shaft 7 in common.
[0025]
FIG. 6 is an example showing the rotation restricting mechanism of the rotating shaft of the present invention. In FIG. 6A, an opening / closing axis hinge is configured by one rotating cam 4, two fixed cams 5, and a coil spring 3 on the opening / closing shaft 1, and the opening / closing shaft 1 is fitted similarly to the fixed cam 5. Two control plates 24 for restricting rotation are installed which are slidable but rotate integrally with the shaft 1. The figure shows a state in which the rotation restricting shaft portion 25 of the rotating shaft 7 is a rectangular and short shaft portion 25-1, and the gap between the restriction control plates 24 is a narrow band 24-1. FIG. 6B is a side view of FIG. 6A, and shows a case where the rotary shaft 10 is installed so that the rotary shaft 7 passes through the side of the open / close shaft rotary cam 4.
[0026]
The rotation restricting control plate 24 is installed in a ring shape, and the rotation restricting shaft portion 25-2 of the rotating shaft has a long and wide width. FIG. 6C shows the shape of the rotation control plate 24. The left and right plates 24-2 and 24-3 face each other with a taper, with a narrow band 24-1 at the top and a wide width 24-4 at the bottom. Have and install. Regarding the rotation restricting shaft portion 25 of the rotating shaft, the short shaft 25-1 can pass only when the plate 24 is a narrow band 24-1, and in the case of the long shaft 25-2, the passage of 24-1 is restricted. Indicates. In the wide width 24-4, a state where the shaft can pass or rotate in either the short length 25-1 or the wide width 25-2 and is not subjected to rotation restriction is shown here. The figure shows that when the rotary shaft 25 moves from the wide width 24-4 to the narrow band 24-1, it touches the walls of 24-2 and 24-3 and gradually moves with the axis direction 25-2. Indicates that the rotation restricting force is received by 25-1 and rotated 90 degrees. FIG.6 (d) shows a mode when the thing of (b) is rotated 360 degree | times for every 90 degree | times. The rotation shaft 51 at the same position as in FIG. 6B changes its position to 52, 53, and 50 every 90 degrees, so the rotation restricting plate 24 as shown in FIG. 6C is installed over 360 degrees. For example, the rotation of the rotary shaft 7 can be restricted at a specific position. The rotation restricting plate 24 is also effective even if it is installed only at a location where rotation is necessary.
[0027]
As a method for implementing the rotation restriction, a method of installing a restriction plate 24 at the end of the rotating shaft 7 as shown in FIG. 4 is also possible.
[0028]
FIG. 7 shows an example of the relationship between the rotation restricting plate 24 and the rotation restricting shaft portion 25. The figure shows the rotation restricting control plate 24 that allows the shaft 7 to rotate only at specific positions of 90, 180, and 270 degrees. Show.
[0029]
FIG. 8 shows an example in which the rotation regulation is possible even when it is installed on the casing side of the device to which the hinge is attached, unlike the case where the rotation restriction is performed with the component attached to the hinge alone. FIG. 8A is an example in which the rotation of the rotation restricting shaft portion 25 is restricted by a gap between two externally attached rotation restricting plates (plate-like) 31, and FIG. The shaft portion 25 is provided, and the rotation is restricted by controlling the gap 24-1 with the externally attached rotation restricting plate (groove shape) 32, respectively.
[0030]
【The invention's effect】
Since the required rotational friction torque is generated by being divided by a plurality of torque generators, the load on one set of generators can be reduced.
Therefore, the stability and durability of the torque value is reduced compared to the conventional one, so the load per set is reduced. Therefore, the characteristic adjustment is simplified and the rotating cam and fixed cam are less likely to wear. 2 axis hinges can be provided.
[0031]
The width of the rotational friction torque value required by the purpose of the biaxial hinge used in the electronic device is considerably different.
By combining the contents of claims 1, 2, and 3 to this requirement, a biaxial hinge having a plurality of torque generators can be provided. Is also available.
[0032]
In the present invention, the rotation and fixed cams are provided with a depression (click) engagement function for ensuring the fixation of the lid at the time of storing and using the monitor lid required by a mobile phone or the like. This is achieved by pressing the convex and concave portions. Therefore, the depression engagement start position and strength can be selected from a combination of rotation and the height and angle (θ) of the unevenness of the fixed cam.
[Brief description of the drawings]
1 is an exploded view of an embodiment according to claim 1 of the present invention;
FIG. 2 is a front view of an embodiment according to claim 1 of the present invention;
FIG. 3 is a front view of an embodiment described in claims 3 and 4 of the present invention.
FIG. 4 is a front view of an embodiment according to claim 5 of the present invention.
FIG. 5 is a front view of an embodiment according to claims 2 and 4 of the present invention.
6 shows an embodiment described in claim 5 of the present invention, in which (a) a front view, (b) a side view, (c) a development view of a rotation control plate of a rotating shaft, (d) a rotating shaft; There are four positions (angle positions of 0, 90, 180, and 270 °).
FIG. 7 is a development view of the rotation control plate of the rotating shaft according to claim 5 of the present invention.
FIG. 8 is a front view of another embodiment described in claim 5 of the present invention; (a) an example in which a control plate is formed on the housing side, and (b) an example in which a control groove is formed on the housing side. is there.
FIG. 9 shows a conventional example, (a) one of the conventional examples, and (b) another example of the conventional example.

Claims (6)

In a biaxial hinge having a rotation axis and an opening / closing axis,
An open / close shaft that has a square cross section and is fitted with a flange installed at an end of the open / close shaft for connecting to the housing at both ends;
A single rotary cam for the open / close shaft, having a concave and / or convex that change the friction torque on both sides, and a flat surface, and a hole for fixing the rotary shaft on the outer periphery;
The both sides of the rotary cam for the opening and closing shaft, which can slide with the opening and closing shaft and rotate integrally with the shaft, have a concave and / or convex to change the friction torque on one surface, and have a flat surface on the other surface Two fixed cams for opening and closing shafts,
Two coil springs for biasing a repulsive force between a flange installed at an end of the opening and closing shaft and the fixed cam for the opening and closing shaft;
A rotary shaft having a square cross section, one end fitted into and fixed to the hole of the above-described opening and closing shaft rotary cam, and a stopper plate attached to the other end;
The both sides of the rotating shaft loosely penetrate with the rotating shaft, and change the friction torque on one side, and have a concave and / or convex, and a flat surface, the other surface has a flat surface, and the outer periphery is another housing. Two rotary shaft rotary cams connected to
The rotating shaft rotating cam for the rotating shaft which can slide with the rotating shaft and rotates integrally with the shaft, has a concave surface and / or convex surface that changes the friction torque on one surface, and has a flat surface on the other surface. Two rotating shaft fixed cams in contact;
A biaxial hinge composed of a single coil spring that urges a repulsive force between the two fixed shaft cams. The open / close shaft rotates at two or more side surfaces so that the fixed cams come into contact with each other. And a biaxial hinge having a plurality of torque generating portions, which are arranged coaxially with each of the rotating shafts. In a biaxial hinge having a rotation axis and an opening / closing axis,
It has a square cross section and is inserted into the open / close shaft with an open / close shaft fixing bracket for connecting to the housing at both ends,
Two open / close shaft fixing cams that are slidable with the open / close shaft and rotate integrally with the shaft, and that have a concave and / or convex shape that changes friction torque on one side, and a flat surface on the other surface A coil spring that urges a repulsive force between the two open / close shaft fixed cams, a convex and / or a concave surface that passes through the open / close shaft and changes the friction torque on one side, and a flat surface The two open / close shaft rotary cams that contact the open / close shaft fixed cam having the same shape are brought into contact with each other to form a cam set, and the cam set faces the open / close shaft fixed cam inwardly at the two ends of the open / close shaft. Two sets are arranged in place,
An open / close shaft torque unit is configured by connecting each of the open / close shaft rotary cams of the cam set to the left and right leg portions of the open / close shaft bracket for connecting to the housing,
Furthermore, the other end of the opening and closing shaft extended from the opening and closing shaft torque unit has a hole that loosely penetrates the rotation shaft, and a rotation shaft that loosely penetrates the hole,
2 that is slidable with the rotating shaft and rotates integrally with the shaft, and has a concave and / or convex shape that changes the friction torque on one surface, and a position that sandwiches the opening / closing shaft that has a flat surface and a flat surface on the other surface. One fixed cam for rotating shaft,
Insert a stop plate or a flange for rotation stop at both ends of the rotation shaft,
A plurality of rotating shaft springs that oscillate between the rotating shaft and urge a repulsive force between the rotating shaft fixed cam and the stop plate and / or the rotation stop flange;
A convex surface, a back surface, or a concave surface and a flat surface are formed on a surface of the circumferential surface of the opening / closing shaft facing both sides of the opening / closing axis direction of the hole and contacting the two rotary shaft fixing cams. A biaxial hinge having a plurality of torque generating portions. A plurality of torques having two or more abutting portions by a combination of configurations of opening and closing shafts according to claim 1 or 2 , and having two or more abutting portions by a combination of configurations of rotating shafts A biaxial hinge having a generator. The opening / closing angle restriction of the opening / closing shaft is integrally attached to a part of the rotation cam for the opening / closing axis or the fixed cam for the opening / closing axis, and the rotation angle restriction of the rotation shaft is integrated to a part of the rotation cam for the rotation shaft or the fixing cam for the rotation shaft. biaxial hinge having a plurality of torque generating unit according to any one of claims 1 to 3, attached, characterized in that there was a. A part of the rotating shaft is formed into a cross section having a major axis and a minor axis, and the width of the opening inhibits the rotation of the rotating shaft while contacting the cross section according to the opening and closing angle of the opening and closing shaft, A rotation restriction control plate having a width that enables rotation of the rotation shaft is provided, or the rotation restriction groove or the rotation restriction plate is formed in a part on the housing side. A biaxial hinge having a plurality of torque generating portions according to any one of 4 . 2. The shaft according to claim 1, wherein the shaft of each part of the portion that slides with the fixed cam is processed into a cross-section other than a circle in order to rotate integrally while sliding with the rotary shaft and the opening / closing shaft. biaxial hinge having a plurality of torque generating unit according to any one of 1 to 4.

Images