JP2020067119A - Biaxial hinge device - Google Patents

Abstract

To provide a biaxial hinge device which is simple in a structure, and small in the number of part items.SOLUTION: In a state that a display box body 101 is completely closed (0-degree state), a first cam face 51 of a stopper 5 is engaged with a turning groove part 26A of a first hinge cam body 2, and a second cam face 52 of the stopper 5 is engaged with a lock groove part 36B of a second hinge cam body 3. Accordingly, the first hinge cam body becomes turnable since the turning groove part 26A is guided by the first cam face 51, and also, since the lock groove part 36NB is locked to the second cam face 52, the second hinge cam body 3 does not turn. By manually opening the display box body 101 clockwise, the first hinge cam body 2 turns clockwise, and in a position in which the first hinge cam body turns clockwise by 180°, the first cam face 51 of the stopper 5 abuts on a lock groove part 26B of the first cam groove 26 at a terminal end, and is stopped.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a biaxial hinge device applied to electronic equipment such as a notebook computer. More specifically, in a notebook personal computer having two housings, which can be folded and opened and closed in a range of 360 degrees, an electronic device capable of locking the other housing while one housing is swinging. The present invention relates to a biaxial hinge device capable of coping with the above.

  A general laptop personal computer (hereinafter referred to as a "laptop computer") is composed of a housing having a keyboard portion and a housing having a display portion, both of which are connected by a hinge device and can be folded. The structure that can be opened and closed is the mainstream. That is, the two housings are opened and closed by rotating via the hinge device. Many of the hinge devices are provided in a pair structure on the end side across two housings, and various structures have already been known and proposed.

  This biaxial hinge device has a structure that opens and closes in a range of 360 degrees via two shafts, and can lock the other housing while one housing is swinging. (Patent Document 1, Patent Document 2). The structure of this biaxial hinge device is such that a restraining stopper is rotatably arranged around an axis between two hinge members, and wings formed at both ends thereof are engaged with notches formed on the outer periphery of the hinge member. Then, the swing of the other case is clamped.

  For the same purpose, a lock member slidable in a linear direction between the two hinge shafts is arranged, and the lock members are engaged with and locked by cam members provided on the two hinge shafts, respectively. There is also proposed a device that prevents the other casing from swinging when the body swings (Patent Documents 3 and 4).

JP, 2013-155874, A JP, 2016-164426, A JP, 2013-249855, A JP, 2015-112238, A

  The above proposed structure is a mechanism that locks the other housing when one housing swings, and arranges a suppression stopper rotatably around an axis or moves the lock member in a linear direction. It is a thing. For this purpose, it is necessary to arrange a guide mechanism for rotation or linear movement. Further, the attachment to the housing requires a separate attachment member, and cannot be said to be a simplified structure. Further, there is still a problem in stability and reliability as the hinge structure. The present invention has been made based on the above technical background, solves the problems of these conventional structures, and achieves the following objects.

An object of the present invention is to provide a biaxial hinge device having a simple structure and a small number of parts.
Another object of the present invention is to provide a biaxial hinge device that operates smoothly and has certainty.
Still another object of the present invention is to provide a biaxial hinge device which has a simple structure and can be manufactured at low cost.

The present invention adopts the following means in order to solve the above problems.
That is, the biaxial hinge device of the present invention 1 is a hinge device that relatively opens and closes the first casing and the second casing, and has a first mounting portion that is fixed to the first casing. The first hinge cam has a first hinge cam body rotatably supported by a support member described later and having a first cam groove formed on the outer periphery thereof, and a second mounting portion fixed to the second housing. A second hinge cam body, which is rotatably supported by a support member to be described later and has a second cam groove formed in the outer periphery, and the first hinge cam body and the second hinge cam body are rotatably supported in parallel with the body. A support member and a second cam surface that is supported by the support member so as to be able to rotate in the forward and reverse directions, has a first cam surface that engages the first cam groove at one end, and engages the second cam groove at the other end. And a stopper formed with.

  A biaxial hinge device according to a second aspect of the present invention is the biaxial hinge device according to the first aspect, wherein the stopper is a cylindrical rod-shaped member, and the first cam surface and the second cam surface are the rod-shaped members. The first cam groove and the second cam groove are notched in a plane parallel to the central axis, and the widths of the first cam groove and the second cam groove are the same as the diameter of the cylindrical rod-shaped member of the stopper. It is characterized in that it is constituted by a groove portion and a rotation groove portion whose groove width is the same size as the height of the missing circle of the first cam surface and the second cam surface.

  A biaxial hinge device according to a third aspect of the present invention is the biaxial hinge device according to the second aspect, wherein the first cam groove is formed on an outer periphery of the first hinge cam body over a range of 180 degrees. The groove is formed over the range of 180 degrees on the outer circumference of the second hinge cam body with a phase shift of 180 degrees with respect to the first cam groove.

  A biaxial hinge device according to a fourth aspect of the present invention is the biaxial hinge device according to the third aspect, wherein the first cam surface and the second cam surface are centered on a central axis of a cylindrical rod-shaped member of the stopper. It is characterized in that they are formed with a 90 ° phase shift in the rotational direction.

  Since the biaxial hinge device of the present invention has a simple structure and a small number of parts, it operates smoothly and reliably, and can be manufactured at low cost.

FIG. 1 is an overall perspective view showing a notebook computer equipped with a biaxial hinge device according to an embodiment of the present invention. FIG. 2 is an overall perspective view showing the biaxial hinge device according to the embodiment of the present invention. 3 shows a first hinge cam body of the biaxial hinge device of FIG. 2, FIG. 3 (a) is a perspective view of the first hinge cam body, FIG. 3 (b) is a front view of FIG. 3 (a), and FIG. (C) is a P arrow line view of FIG.3 (b). 4 shows a second hinge cam body of the biaxial hinge device of FIG. 2, FIG. 4 (a) is a perspective view of the second hinge cam body, FIG. 4 (b) is a front view of FIG. 4 (a), and FIG. FIG. 4C is a view on arrow Q in FIG. 5 shows a support member of the biaxial hinge device of FIG. 2, FIG. 5 (a) is a perspective view of the support member, FIG. 5 (b) is a front view of FIG. 5 (a), and FIG. FIG. 5B is a view on arrow R, and FIG. 5D is a view on arrow S in FIG. 5B. 6 shows a stopper of the biaxial hinge device of FIG. 2, FIG. 6 (a) is a perspective view of the stopper, FIG. 6 (b) is a front view of FIG. 6 (a), and FIG. 6 (c) is FIG. It is a T arrow line view of (b). 7 shows a biaxial hinge device in which the display housing of the notebook computer of FIG. 1 is completely closed (0 degree state), and FIG. 7 (a) is a front view of the biaxial hinge device. FIG. 7B is a perspective view of FIG. 7A, and FIG. 7C is a perspective view in which the support member is removed from FIG. 7B so that the engagement state of the cam groove and the cam surface can be seen. FIG. 8 shows the biaxial hinge device in a state where the display housing of the notebook computer shown in FIG. 1 is opened 180 degrees clockwise (state of 180 degrees), and FIG. 8A is a front view of the biaxial hinge device. 8 (b) is a perspective view of FIG. 8 (a), and FIG. 8 (c) is a perspective view in which the support member is removed from FIG. 8 (b) so that the engagement state of the cam groove and the cam surface can be seen. is there. FIG. 9 shows the state after FIG. 8, showing the biaxial hinge device in the state where the main body housing of the laptop computer shown in FIG. 1 is opened counterclockwise by 20 degrees (states of 180 degrees and 20 degrees). 9 (a) is a front view of the biaxial hinge device, FIG. 9 (b) is a perspective view of FIG. 9 (a), and FIG. 9 (c) is a support member removed from FIG. It is a perspective view which made the engagement state of a surface visible. FIG. 10 shows the state after FIG. 9, showing the biaxial hinge device in the state where the main body housing of the notebook computer shown in FIG. 1 is opened 180 degrees counterclockwise (states of 180 degrees and 180 degrees). 10 (a) is a front view of the biaxial hinge device, FIG. 10 (b) is a perspective view of FIG. 10 (a), and FIG. 10 (c) is a cam groove and a cam with a support member removed from FIG. 10 (b). It is a perspective view which made the engagement state of a surface visible. FIG. 11 is an operation explanatory diagram showing an opening operation of the display housing and the main body housing of the notebook computer of FIG.

[Description of Structure of Biaxial Hinge Device]
Hereinafter, a biaxial hinge device according to an embodiment of the present invention will be described with reference to the drawings. FIG. 1 is an overall perspective view showing a notebook computer equipped with a biaxial hinge device according to an embodiment of the present invention. As shown in FIG. 1, a notebook computer 100 including a biaxial hinge device according to an embodiment of the present invention includes a display housing (first housing) 101 having a display unit 103 and a keyboard unit 104. Further, the left and right ends of each rear portion of the main body housing (second housing) 102 are openably and closably connected by the biaxial hinge devices 1 and 1 according to the embodiment of the present invention.

  Next, the biaxial hinge devices 1 and 1 will be described. Since the two biaxial hinge devices 1 and 1 have the same structure, only one biaxial hinge device 1 will be described and the other biaxial hinge device 1 will not be described. 2 is an overall perspective view showing a biaxial hinge device 1 according to an embodiment of the present invention, FIG. 3 shows a first hinge cam body 2 of the biaxial hinge device 1 of FIG. 2, and FIG. 3B is a perspective view of the body 2, FIG. 3B is a front view of FIG. 3A, and FIG. 3C is a P arrow view of FIG. 3B. 4 shows the second hinge cam body 3 of the biaxial hinge device 1 of FIG. 2, FIG. 4 (a) is a perspective view of the second hinge cam body 3, FIG. 4 (b) is a front view of FIG. 4 (a), FIG.4 (c) is a Q arrow line view of FIG.4 (b). 5 shows the support member 4 of the biaxial hinge device 1 of FIG. 2, FIG. 5 (a) is a perspective view of the support member 4, FIG. 5 (b) is a front view of FIG. 5 (a), and FIG. 5 (b) is a view on arrow R in FIG. 5 (b), and FIG. 5 (d) is a view on arrow S in FIG. 5 (b). 6 shows the stopper 5 of the biaxial hinge device 1 of FIG. 2, FIG. 6 (a) is a perspective view of the stopper 5, FIG. 6 (b) is a front view of FIG. 6 (a), and FIG. It is a T arrow line view of FIG.6 (b).

  As shown in FIGS. 2 to 6, the biaxial hinge device 1 includes a first hinge cam body 2, a second hinge cam body 3, a support member 4, and a stopper 5. The first hinge cam body 2 and the second hinge cam body 3 are rotatably supported by a support member 4 in parallel with each other, and the stopper 5 is supported by the support member 4 so as to be able to rotate forward and backward. As shown in FIG. 5, the support member 4 has cylindrical support holes 42A and 42B formed in parallel with each other at both ends in the vertical direction of a flat plate-shaped main body 41. A columnar shaft portion 21 (see FIG. 3) at the left end of the first hinge cam body 2 is rotatably supported in one support hole 42A, and a columnar shaft portion at the left end of the second hinge cam body 3 in the other support hole 42B. 31 (see FIG. 4) is rotatably supported. As shown in FIG. 3, a first mounting portion 23 for fixing to the display housing (first housing) 101 is formed on the right end of the cylindrical shaft portion 22 on the right side of the first hinge cam body 2. There is. The first mounting portion 23 is formed in a flat plate shape by cutting out in a plane parallel to the central axis of the shaft portion 22. A screw hole 24 is formed in the first mounting portion 23, and the display housing 101 is fixed with a screw (not shown). A cylindrical large-diameter shaft portion 25 is formed between the left end shaft portion 21 and the right-side shaft portion 22, and a first cam groove 26 is formed on the outer periphery of the large-diameter shaft portion 25.

  Similarly, as shown in FIG. 4, at the right end of the cylindrical shaft portion 32 on the right side of the second hinge cam body 3, a second mounting portion 33 for fixing to the main body casing (second casing) 102 is provided. Has been formed. The second mounting portion 33 is formed in a flat plate shape by cutting out in a plane parallel to the central axis of the shaft portion 32. A screw hole 34 is formed in the second mounting portion 33, and the main body housing 102 is fixed with a screw (not shown). A cylindrical large-diameter shaft portion 35 is formed between the left end shaft portion 31 and the right-side shaft portion 32, and a second cam groove 36 is formed on the outer periphery of the large-diameter shaft portion 35. As shown in FIG. 6, the stopper 5 is a cylindrical rod-shaped member, and has a first cam surface 51 that engages with the first cam groove 26 at one end and engages with the second cam groove 36 at the other end. The second cam surface 52 is formed. The first cam surface 51 and the second cam surface 52 have a cutout (D cut) circular shape cut out in a plane parallel to the central axis of the rod-shaped member of the stopper 5. The first cam surface 51 and the second cam surface 52 are formed with a 90-degree phase shift in the rotational direction about the central axis of the rod-shaped member of the stopper 5. The diameter of the cylindrical rod-shaped member of the stopper 5 is D, and the height of the missing circle between the first cam surface 51 and the second cam surface 52 is h.

  As shown in FIGS. 3 and 4, the first cam groove 26 of the first hinge cam body 2 and the second cam groove 36 of the second hinge cam body 3 are in the range of 180 degrees on the outer circumference of the large-diameter shaft portions 25 and 35. Formed across. The first cam groove 26 and the second cam groove 36 are composed of rotating groove portions 26A and 36A and locking groove portions 26B and 36B. The rotation groove portions 26A and 36A are formed such that the groove width W2 is the same as the height h of the missing circle of the first cam surface 51 and the second cam surface 52. The engaging groove portions 26B and 36B are formed such that the groove width W1 is the same as the diameter D of the cylindrical rod-shaped member of the stopper 5. The locking groove portions 26B and 36B are formed only at one end of the first cam groove 26 and the second cam groove 36. The rotation groove portions 26A and 36A are formed in the remaining portions of the first cam groove 26 and the second cam groove 36. The first cam groove 26 and the second cam groove 36 are formed 180 degrees out of phase with each other. As shown in FIG. 5, support plates 43A and 43B are integrally formed on the main body portion 41 of the support member 4, and the distance W3 between the support plates 43A and 43B is determined by the diameter D of the cylindrical rod-shaped member of the stopper 5. Are formed to have the same size as Therefore, the stopper 5 is sandwiched between the support plates 43A and 43B and supported so as to be able to rotate forward and backward.

[Explanation of opening / closing operation of biaxial hinge device]
Next, the opening / closing operation of the biaxial hinge device 1 will be described in detail. FIG. 7 shows the biaxial hinge device 1 with the display housing 101 of the laptop computer 100 completely closed (0 degree state), and FIG. 7A is a front view of the biaxial hinge device 1. FIG. 7B is a perspective view of FIG. 7A, and FIG. 7C is a perspective view in which the support member 4 is removed from FIG. 7B so that the engagement state of the cam groove and the cam surface can be seen. FIG. 11 is an operation explanatory diagram showing an opening operation of the display housing 101 and the main body housing 102 of the notebook computer 100. As shown in FIGS. 7 and 11A, when the display housing 101 is completely closed (0 degree state), the first cam surface 51 of the stopper 5 is provided in the rotation groove portion 26A of the first hinge cam body 2. Are engaged (the plane portion of the first cam surface 51 is parallel to the rotation groove portion 26A), and the second cam surface 52 of the stopper 5 is engaged with the locking groove portion 36B of the second hinge cam body 3 (second cam). The flat surface portion of the surface 52 is orthogonal to the locking groove portion 36B). Therefore, the first hinge cam body 2 is rotatable with the rotation groove portion 26A guided by the first cam surface 51, and the second hinge cam body 3 has the engagement groove portion 36B engaged with the second cam surface 52. Therefore, it cannot rotate.

  FIG. 8 shows the biaxial hinge device 1 in a state where the display housing 101 of the notebook computer 100 is opened 180 degrees clockwise (180 ° state), and FIG. 8A is a front view of the biaxial hinge device 1. 8B is a perspective view of FIG. 8A, and FIG. 8C is a perspective view in which the support member 4 is removed from FIG. 8B so that the engagement state of the cam groove and the cam surface can be seen. It is a figure. As shown in FIGS. 8 and 11B, when the display housing 101 is opened clockwise by hand, the first hinge cam body 2 rotates clockwise, and the display housing 101 rotates 180 degrees clockwise. At the moved position, the first cam surface 51 of the stopper 5 comes into contact with the locking groove portion 26B at the end of the first cam groove 26 and stops.

  Next, the operation of opening the main body casing 102 in the counterclockwise direction will be described. 9 shows the state after FIG. 8, showing the biaxial hinge device 1 in the state where the main body housing 102 of the notebook computer 100 is opened 20 degrees counterclockwise (states of 180 degrees and 20 degrees). 9 (a) is a front view of the biaxial hinge device 1, FIG. 9 (b) is a perspective view of FIG. 9 (a), and FIG. 9 (c) is a perspective view of FIG. It is a perspective view which made the engagement state of a cam surface visible. As shown in FIGS. 9 and 11C, when the main body housing 102 is opened counterclockwise by the hand, the second hinge cam body 3 rotates counterclockwise. Then, the second cam surface 52 of the stopper 5 is pushed by the locking groove portion 36B, and the stopper 5 rotates 90 degrees clockwise about the central axis of the rod-shaped member. As a result, the second cam surface 52 of the stopper 5 engages with the rotation groove portion 36A (the flat surface portion of the second cam surface 52 is parallel to the rotation groove portion 36A), and the first cam surface 51 of the stopper 5 engages. Engages with the stop groove portion 26B (the flat surface portion of the first cam surface 51 is orthogonal to the locking groove portion 26B). Accordingly, the second hinge cam body 3 is rotatable counterclockwise with the rotation groove portion 36A being guided by the second cam surface 52, and the first hinge cam body 2 has the engagement groove portion 26B engaged with the first cam surface 51. It cannot be rotated because it is stopped.

  FIG. 10 shows the state after FIG. 9, showing the biaxial hinge device 1 with the main body casing 102 of the notebook computer 100 opened 180 degrees counterclockwise (states of 180 degrees and 180 degrees). 10 (a) is a front view of the biaxial hinge device 1, FIG. 10 (b) is a perspective view of FIG. 10 (a), and FIG. 10 (c) is a cam groove with the support member 4 removed from FIG. 10 (b). FIG. 6 is a perspective view showing an engaged state of the cam surface and a cam surface. As shown in FIGS. 10 and 11D, when the main body housing 102 is further opened counterclockwise by hand, the second hinge cam body 3 further rotates counterclockwise, and the second hinge cam body 3 moves 180 degrees. The second cam surface 52 of the stopper 5 comes into contact with the rotation groove portion 36 </ b> A at the end of the second cam groove 36 and stops at the position rotated in the counterclockwise direction. In this way, the notebook computer 100 can be opened 360 degrees. In order to return the display housing 101 of FIG. 11A to the closed state, the operations of FIGS. 7 to 10 described above may be performed in reverse. Since the biaxial hinge device according to the embodiment of the present invention has a simple structure and a small number of parts, it operates smoothly and reliably, and can be manufactured at low cost.

  Although the embodiment of the present invention has been described above, the present invention is not limited to this embodiment. For example, in the above-described embodiment, an example in which the invention is applied to a notebook computer has been described, but the invention may be applied to other folding electronic devices such as a mobile information terminal, a mobile phone, and a portable game machine.

100 ... Laptop computer 101 ... Display case (first case)
102 ... Main body housing (second housing)
103 ... Display part 104 ... Keyboard part 1 ... Biaxial hinge device 2 ... First hinge cam body 21 ... Shaft part 22 ... Shaft part 23 ... First mounting part 24 ... Screw hole 25 ... Large diameter shaft part 26 ... First cam groove 26A ... Rotating groove portion 26B ... Locking groove portion 3 ... Second hinge cam body 31 ... Shaft portion 32 ... Shaft portion 33 ... Second mounting portion 34 ... Screw hole 35 ... Large diameter shaft portion 36 ... Second cam groove 36A ... Rotation Groove 36B ... Locking groove 4 ... Support member 41 ... Main body 42A, 42B ... Support holes 43A, 43B ... Support plate 5 ... Stopper 51 ... First cam surface 52 ... Second cam surface

Claims (4)

A hinge device for relatively opening and closing the first casing and the second casing,
A first hinge cam body that has a first mounting portion that is fixed to the first housing, is rotatably supported by a support member described later, and has a first cam groove formed on the outer periphery thereof;
A second hinge cam that has a second mounting portion that is fixed to the second housing, is rotatably supported by a support member described later in parallel with the first hinge cam body, and has a second cam groove formed on the outer periphery. Body and
A support member for rotatably supporting the first hinge cam body and the second hinge cam body,
The support member is rotatably supported by the support member, and has a first cam surface that engages with the first cam groove at one end and a second cam surface that engages with the second cam groove at the other end. Biaxial hinge device consisting of a stopper. The biaxial hinge device according to claim 1,
The stopper is a cylindrical rod-shaped member, and the first cam surface and the second cam surface have a truncated circular shape cut out in a plane parallel to the central axis of the rod-shaped member,
The first cam groove and the second cam groove have locking grooves whose groove width is the same as the diameter of the cylindrical rod-shaped member of the stopper, and whose groove width is the first cam surface and the second cam. A biaxial hinge device characterized in that the biaxial hinge device is constituted by a turning groove portion having the same size as the height of the circle of the surface. The biaxial hinge device according to claim 2,
The first cam groove is formed on the outer circumference of the first hinge cam body over a range of 180 degrees, and the second cam groove is 180 degrees out of phase with the first cam groove to form the second hinge cam. A biaxial hinge device, which is formed on the outer circumference of the body over a range of 180 degrees. The biaxial hinge device according to claim 3,
The first cam surface and the second cam surface are formed with a 90-degree phase shift in the rotational direction about the central axis of the cylindrical rod-shaped member of the stopper. .

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