JP7333049B2 - Biaxial hinge device and electronic equipment using this biaxial hinge device - Google Patents

Description

In the present invention, for example, a mobile phone, an electronic pocketbook, a PDA, a netbook, and a notebook computer are attached so that they can be opened and closed with the flexible display sheet made of organic EL facing outward across the first and second housings. The present invention relates to a biaxial hinge device suitable for use in electronic equipment such as the above, and an electronic equipment using this biaxial hinge device.

In recent years, a foldable electronic device, such as a mobile phone, has been developed and is on the market, in which a single organic EL flexible display sheet is attached to both surfaces of the first and second housings. Regarding such an electronic device, Patent Documents 1 and 2 disclose devices in which the flexible display sheet is turned outward and the outer flexible display sheet is bent in a semicircular shape at the center when the first and second housings are closed. is proposed. In the electronic device of Patent Literature 1, a biaxial hinge device is used to connect the rear ends of the first and second housings so that the front end can be opened and closed. In the case of such connection, when the first and second housings are opened from the closed state, the center of the flexible display sheet is bent by the length of this semicircle. Therefore, in Patent Document 1, the biaxial hinge device is provided with guide means for sliding the first and second housings to the front end side and the rear end side, and after the first and second housings are opened, the second housing is opened. By sliding the first and second housings toward the front end portion side, the flexible display sheet is expanded in a straight line (planar shape) by stretching the bending of the central portion of the flexible display sheet.

However, in the electronic device of Patent Document 1, there is a possibility that the center of the flexible display sheet is pulled toward the rear end side of the first and second housings when the first and second housings are closed from the opened state. be.

Therefore, in the electronic device of Patent Document 2, a multi-axis hinge device using five hinge shafts is used, and the five hinge shafts are interlocked with the closing operation from the opened state of the first and second housings. By narrowing the distance, the length of the support surface of the flexible display sheet between the first and second housings in the multi-axis hinge device is devised to be kept constant.

U.S. Pat. No. 9,848,502 JP 2018-132129 A JP 2017-215012 A

Since the multi-axis hinge device of Patent Document 2 has a large number of hinge shafts, the number of parts tends to increase and the manufacturing cost tends to increase. In addition, since the number of hinge shafts is large, the rotation angle of each hinge shaft is small when opening and closing the first housing and the second housing. It is difficult to design possible synchronous rotation means and suction means. An object of the present invention is to solve these problems, and the object thereof is to fix the length of the support surface of the flexible display sheet to the first and second housings attached with the flexible display sheet on the outside. To provide a biaxial hinge device that maintains and connects so as to be openable and closable. At the same time, the first and second housings are symmetrically opened and closed, and the opening angle of the biaxial hinge device is forcibly pulled between the closed position and the open position of the first and second housings. An object of the present invention is to provide a biaxial hinge device with good operability that can meet the technical requirement that it is necessary to give a comfortable feeling to a hinge with a simpler structure.

In order to solve the above problems, a biaxial hinge device according to claim 1 is provided in an electronic device in which a flexible display sheet is attached to the first and second housings with the flexible display sheet facing outward. A biaxial hinge device that connects the rear ends of two hinges so that the front ends thereof can be opened and closed, and comprises first and second hinge shafts, and the first and second hinge shafts provided between the first and second hinge shafts. Synchronous rotation means for synchronously rotating the second hinge shafts in opposite directions respectively; suction means for rotationally urging the first and second hinge shafts; and first and second housings fixed to the first and second housings, respectively, and slidable along the first and second opening/closing members toward the front end side and the rear end side. The slider and the first and second sliders driven by the suction means accompanying the operation of opening the first and second housings are guided to the front end side, respectively, and the first and second housings are closed. guide means for guiding the first and second sliders driven by the suction means along with the movement to the rear end side, wherein the guide means extends in the axial direction of the first and second hinge shafts. and guides the first and second sliders arcuately in a plane perpendicular to the axial direction with respect to the first and second hinge shafts.

In the biaxial hinge device of claim 2, the guide means includes first and second opening/closing members that rotate via the first and second hinge shafts, and the first and second opening/closing members that are overlapped with each other. It is characterized by having first and second guide members that slide while being engaged with each other by meshing the guide grooves and/or the guided projections.

In the biaxial hinge device of claim 3 , the plurality of guide members are semicircular fixed guide members provided at axial ends of a center block that rotatably supports the first and second hinge shafts. , first and second rotary guide members respectively provided on the rotation center side of the first and second side blocks fixed to the first and second sliders, the fixed guide member and the first and second and a first and a second relay guide member sandwiched between the two rotating guide members and superimposed on each other.

In the biaxial hinge device according to claim 4 , the center block supports two sets of the first and second hinge shafts with an interval in the axial direction, and two sets of the first and second hinge shafts. It is characterized by having a wiring holding part capable of holding a wiring that intersects in the axial direction between.

In the biaxial hinge device of claim 5 , the first and second hinge shafts are fixed at one ends to the ends of the first and second hinge shafts and the other ends are pivotally supported by the rotating ends of the first and second opening/closing members. A second opening/closing link member is provided, and the other ends of the first and second opening/closing link members are pivotally supported together with rollers rotatably contacting the first and second sliders. .

In the biaxial hinge device according to claim 6 , the synchronous rotation means are guided by first and second spiral grooves provided symmetrically on the first and second hinge shafts and by the first and second hinge shafts. and an interlocking member provided movably in the axial direction and meshing with the first and second spiral grooves.

In the biaxial hinge device according to claim 7 , the suction means has a predetermined unevenness and comprises first and second rotating cams which are rotatable integrally with respect to the first and second hinge shafts, respectively. a cam plate having recesses and protrusions meshing with the predetermined recesses and protrusions, rotatably supporting the first and second hinge shafts and bringing the protrusions and recesses into contact with the first and second rotating cams; It is characterized by having first and second rotating cams and first and second elastic means for pressing the cam plate, respectively.

An electronic device of the present invention is characterized by using the biaxial hinge device according to any one of the above claims.

When configured like the biaxial hinge device of claim 1, the first and second housings attached with the flexible display sheet facing outward are connected so as to be openable and closable while the length of the support surface of the flexible display sheet is kept constant. It is possible to provide a biaxial hinge device that At the same time, the first and second housings are symmetrically opened and closed, and the opening angle of the biaxial hinge device is forcibly pulled between the closed position and the open position of the first and second housings. It is possible to provide a biaxial hinge device with good operability that can meet the technical requirement that it is necessary to give a comfortable feel to opening and closing operations with a simpler structure.

Specifically, the guide means guides the first and second sliders in an arc within a plane perpendicular to the axial direction with respect to the first and second hinge shafts, thereby In conjunction with opening and closing, the first and second sliders driven by the suction means can be continuously moved to the front end side or the rear end side. Further, since the guide means is provided outside the first and second hinge shafts in the axial direction, a large area in the axial direction of the first and second hinge shafts can be allocated to the synchronous rotation means and the suction means. In addition, since the number of hinge shafts is small, the rotation angle of each hinge shaft is large when opening and closing the first housing and the second housing. It is easy to design synchronous rotating means and suction means that are operable. Furthermore, since the number of hinge shafts is small, it is possible to construct a biaxial hinge device capable of opening and closing the first and second housings with the flexible display sheet on the outside, with a small number of parts.

According to the biaxial hinge device of claim 2, the simple structure in which the guide groove and the guided projection are engaged with each other realizes the arcuate guidance, and the guide means is constructed by superimposing a plurality of guide members in the axial direction. Therefore, a large axial space can be allocated to the first and second hinge shafts by reducing the axial thickness of the guide means. Therefore, it is easy to improve the performance of the synchronous rotation means and the suction means as described above.

According to the biaxial hinge device of claim 3 , the guide means can be constructed with the minimum number of guide members, ie, three superimposed guide members and a total of five guide members.

According to the biaxial hinge device of claim 4 , the thickness of the biaxial portion is used to provide the wiring holding portion, which contributes to the reduction in thickness of the biaxial hinge device and electronic equipment.

According to the biaxial hinge device of claim 5 , the rotation of the first and second hinge shafts can be efficiently transmitted to the first and second opening/closing members, and the number of components for the first and second opening/closing members can be reduced. The sliding of the first and second sliders can be performed smoothly.

In the biaxial hinge device of claim 6 , smooth synchronous rotation of the first and second hinge shafts can be achieved with a small number of parts and a narrow space. Thereby, the symmetry of sliding of the first and second sliders with respect to the first and second rotating members can be enhanced in the opening and closing process of the first and second housings.

According to the biaxial hinge device of claim 7 , it is possible to achieve precise and powerful suction of the rotational positions of the first and second hinge shafts with a small number of parts and a narrow space. Thereby, the first and second sliders can be slid with respect to the first and second rotating members by overcoming the frictional resistance between the guide members in the process of opening and closing the first and second housings.

1 shows a mobile phone having a flexible display sheet using a biaxial hinge device according to the present invention, (a) is a perspective view when the first housing and the second housing are closed, and (b) is the first housing and It is the perspective view which opened the 2nd housing|casing. FIG. 2 is a partially exploded perspective view of the mobile phone shown in FIG. 1 in an open state, with the flexible display sheet and the elastic sheet removed. 2A is a partial cross-sectional view of the first housing and the second housing closed, and FIG. 4B is the first housing. FIG. It is a partial cross-sectional view of the body and the second housing opened. 4A is a perspective view of closing the first slider and the second slider, and FIG. It is a perspective view seen. FIG. 5 is an exploded perspective view illustrating the component configuration of the biaxial hinge device shown in FIG. 4; 5A and 5B are explanatory views of the sliding motion of the first and second sliders in the biaxial hinge device shown in FIG. and a partial cross-sectional view of the second slider opened. FIG. 5 is an explanatory diagram of the arrangement of the rotation interlocking means and the suction means when the biaxial hinge device shown in FIG. 4 is viewed from the bottom side; (b) is a partial cross-sectional view of the first and second sliders opened. The center block in the biaxial hinge device according to the present invention is shown, (a) is a perspective view seen from the flexible display sheet supporting surface side, (b) is a perspective view seen from the bottom side, (c) is fixed on one end side A side view of a guide member, and (d) is a side view of a fixed guide member on the other end side. 1 shows first and second opening and closing members in a biaxial hinge device according to the present invention, (a) is a perspective view seen from the first and second slider sides, (b) is a perspective view seen from the back side cover side, (c) is a side view of one end side. 1 shows first and second sliders in a biaxial hinge device according to the present invention, (a) is a perspective view seen from the first and second opening/closing member sides, and (b) is a perspective view seen from the first and second opening/closing member sides. (c) is a rear view. 1 shows a back side cover in a biaxial hinge device according to the present invention, (a) is a perspective view seen from the opposite side covering the first and second opening/closing members, and (b) is the opposite side covering the first and second opening/closing members. It is the top view seen from the side. The first and second hinge shafts in the biaxial hinge device according to the present invention are shown, (a) is a side view of the first hinge shaft, and (b) is a side view of the second hinge shaft. 1 shows a hold block in a biaxial hinge device according to the present invention, where (a) is an exploded perspective view seen from diagonally above, and (b) is an exploded perspective view seen from diagonally below. The interlocking member in the biaxial hinge device according to the present invention is shown, (a) is a perspective view seen from diagonally above, (b) is a plan view seen from above, and (c) is a side view. 1A is a perspective view of a rotating cam in a biaxial hinge device according to the present invention, FIG. BRIEF DESCRIPTION OF THE DRAWINGS The cam plate in the biaxial hinge apparatus based on this invention is shown, (a) is the perspective view seen from diagonally upward direction, (b) is the top view seen from the axial direction, (c) is a side view. 1 shows a first side block in a biaxial hinge device according to the present invention, (a) is a perspective view seen from the guided projection side, (b) is a perspective view seen from the guide groove side, (c) is the first and It is the top view seen from the 2nd hinge shaft side, (d) is the top view seen from the outside. The second side block in the biaxial hinge device according to the present invention is shown, (a) is a perspective view seen from the guided projection side, (b) is a perspective view seen from the guide groove side, (c) is the first and It is the top view seen from the 2nd hinge shaft side, (d) is the top view seen from the outside. 1 shows a first relay guide member in a biaxial hinge device according to the present invention, (a) is a perspective view seen from the guided projection side, (b) is a perspective view seen from the guide groove side, (c) is a guided It is a plan view seen from the projection side, and (d) is a plan view seen from the guide groove side. 2 shows a second relay guide member in a biaxial hinge device according to the present invention, (a) is a perspective view seen from the guided protrusion side, (b) is a perspective view seen from the guide groove side, and (c) is a guided part. It is a plan view seen from the projection side, and (d) is a plan view seen from the guide groove side. The first and second slide link members in the biaxial hinge device according to the present invention are shown, (a) is a perspective view seen obliquely from above, and (b) is an operation when the first and second sliders are closed. FIG. 2C is a schematic diagram, and (c) is a schematic diagram of the operation when the first and second sliders are opened. FIG. 4 is an explanatory diagram of the operation of the fixed guide member and the first and second intermediate guide members in the biaxial hinge device according to the present invention, (a) is the first and second sliders closed, and (b) is the intermediate guide member. position state. FIG. 4 is an explanatory diagram of the operation of the first and second intermediate guide members and the first and second rotary guide members in the biaxial hinge device according to the present invention, (a) showing the state of the intermediate position, and (b) showing the first and the second slider is open.

Embodiments of the present invention will be described below by exemplifying a biaxial hinge device according to the present invention and a mobile phone as an example of an electronic device using the biaxial hinge device. However, the biaxial hinge device according to the present invention is not only used for mobile phones, but also for electronic notebooks, PDAs, netbooks, notebook computers, etc., as described above. can be widely used in an electronic device having a configuration in which the first housing and the second housing to which the flexible display sheet 1 is attached are connected to each other so as to be openable and closable with the flexible display sheet 1 facing outward.

1 to 3 schematically show a mobile phone according to the electronic equipment of the present invention. As shown in FIG. 1(a), the mobile phone 1 is opened from a closed position P1 where the first and second housings 2 and 3 are bent with the flexible display sheet 5 facing outward as shown in FIG. 1(b). In addition, the flexible display sheet 5 can be flattened and opened/closed to the open position P2 where the first and second housings 2 and 3 are positioned in a straight line. As shown in FIG. 2, the mobile phone 1 includes first and second housings 2 and 3 and a flexible elastic sheet 4 extending over the upper surfaces of the first and second housings 2 and 3. It is composed of, for example, an organic EL flexible display sheet 5 which is attached via a frame, and a biaxial hinge device 6 which connects the rear end sides of the first and second housings 2 and 3 . The biaxial hinge device 6 connects the first and second housings 2 and 3 on the lower side of the elastic sheet 4 and thus the flexible display sheet 5 so as to be able to open and close. In the biaxial hinge device 6, the bracket 6d on the side of the first housing 2 is fixed to the first housing 2 using screws 6c, and the bracket 6e on the side of the second housing 3 is fixed to the second housing using screws 6c. It is fixed at 3. The sponge layer 4a absorbs expansion and contraction of the flexible display sheet 5 accompanying bending and stretching of the elastic sheet 4. As shown in FIG.

The biaxial hinge device 6 is provided with biaxial hinge devices 6a and 6b on both sides in the left-right direction of the first housing 2 and the second housing 3, respectively. The mounting accuracy of the bodies 2 and 3 is improved. However, the biaxial hinge device 6 can be divided at the central portion in the left-right direction to form the biaxial hinge devices 6a and 6b separately, or the biaxial hinge device 6a alone can be used. Between the two-axis hinge devices 6a and 6b in the axial direction, there is provided a wiring passage portion 6p for allowing wiring to pass through the inner space 2a of the first housing 2 and the inner space 3a of the second housing 3. It is

As shown in FIG. 3, the biaxial hinge device 6 is manually opened and closed between the closed position P1 and the open position P2 of the mobile phone 1. As shown in FIG. The biaxial hinge device 6 opens and closes the first and second housings 2 and 3 to move from the closed position P1 to the open position P2 and from the open position P2 to the closed position P1. 60 keeps the length of the support surface Lc of the flexible display sheet 5 along the biaxial hinge device 6 substantially constant. As shown in FIG. 3A, the biaxial hinge device 6 moves the first and second sliders 15 and 16 rearward (upward) at the closed position P1. This prevents the central portion of the flexible display sheet 5 positioned between the first and second housings 2 and 3 from being strongly pulled outward during the process of closing the first and second housings 2 and 3. ing. As shown in FIG. 3B, the biaxial hinge device 6 moves the first and second sliders 15 and 16 to the front end side (both outer sides) at the open position P2. As a result, the flexible display sheet 5 is held flat during the process of opening the first and second housings 2 and 3, and lifting (deflection) of the center is avoided.

4 to 23 schematically show a biaxial hinge device 6 according to the biaxial hinge device of the present invention. The biaxial hinge device 6 is, as described in claim 1 of the scope of claims, in the electronic device 1 mounted across the first and second housings 2 and 3 with the flexible display sheet 5 facing outward. A biaxial hinge device that connects the rear ends of the first and second housings 2 and 3 so that the front ends thereof can be opened and closed, and comprises first and second hinge shafts 21 and 22 and the first and a synchronous rotation means 30a for synchronously rotating the second hinge shafts 21 and 22, and the first and second hinge shafts 21 and 22 from a predetermined opening/closing angle to the open position P2 and the closed position P1. suction means 40a for urging the hinge shafts 21 and 22 to rotate; Second opening/closing members 13, 14 and fixed to the first and second housings 2, 3, respectively, and along the first and second opening/closing members 13, 14, front end side and rear end portion The first and second sliders 15 and 16 slidably provided to the side, and the first and second sliders 15 and 16 driven by the suction means 40a accompanying the operation of opening the first and second housings 2 and 3. The sliders 15 and 16 are guided to the front end side, respectively, and the first and second sliders 15 and 16 driven by the suction means 40a are moved backward as the first and second housings 2 and 3 are closed. and a guide means 50 for guiding to the end portion side, the guide means 50 being provided axially outside the first and second hinge shafts 21 and 22, and the first and second hinge shafts 21 and 22, the first and second sliders 15 and 16 are guided in a circular arc within a plane perpendicular to the axial direction.

As shown in FIGS. 4(a) and 4(b), the biaxial hinge device 6 symmetrically opens and closes the first and second sliders 15 and 16 by synchronous rotating means 30a and 30b. In the symmetrical opening and closing process, the biaxial hinge device 6 positively pushes the sliders 15 and 16 to the rear end side or the front end side. On the closed position P1 side, the sliders 15 and 16 are pulled toward the closed position P1 and stopped at the closed position P1, and on the open position P2 side, the sliders 15 and 16 are pushed to the open position P2 and stopped at the open position P2. The suction means 40a, 40b generate driving force to move the first and second sliders 15, 16 toward the closed position P1 and the open position P2. The synchronous rotation means 30a, 30b rotate the first and second hinge shafts 21, 22, 23, 24 in conjunction with the opening and closing of the first housing 2 and the third housing 3, thereby Rotation of the first opening/closing member 13 with respect to the hinge shafts 21 and 23 and rotation of the second opening/closing member 14 with respect to the second hinge shafts 22 and 24 are synchronized. The suction means 40a, 40b, 40c, and 40d change the rotational positions of the first and second hinge shafts 21, 22, 23, and 24 shown in FIG. , a closed position P1 where the first housing 2 and the third housing 3 face each other, and an open position P2 where the first housing 2 and the third housing 3 are deployed in a straight line. .

As shown in FIG. 5, the biaxial hinge device 6 is constructed by assembling many parts. The center block 11 is a vertically long molded article made of synthetic resin. have The center block 11 has two hold blocks 25 attached to the lower surface of the beam portion 11a to rotatably support the first hinge shafts 21 and 23 and the second hinge shafts 22 and 24, respectively. The center block 11 supports two sets of the first and second hinge shafts 21, 22, 23, 24 at intervals in the axial direction, and supports the two sets of the first and second hinge shafts 21, 22, 23, 24. It has a wiring holding portion 11p capable of holding a wiring that intersects in the axial direction between. Therefore, the biaxial hinge device 6 can be made thin while ensuring the wire passing portion 6p in the biaxial hinge device 6 .

As shown in FIGS. 13(a) and 13(b), the hold block 25 is divided into hold members 25a and 25b, and attached to the center block 11 by tightening a screw 25c into a female screw 25d of the center block 11. . As shown in FIGS. 12(a) and 12(b), at both end portions of the first hinge shaft 21 and the second hinge shaft 22, there are provided, so that they are restrained in the axial direction when sandwiched between the hold members 25a and 25b. Small diameter portions 21b, 21b are formed. The back side cover 12 is attached to the lower side of the center block 11 by inserting the screws 12a into the screw holes 12b at both ends in the left-right direction and tightening the female screws 12c on the lower surface of the center block 11 shown in FIG. 8(b). and protects the biaxial portion 20 .

Rotating cams 41, 41, cam plates 42, elastic members 43, 43, and interlocking members 35, 36 are inserted into the first hinge shafts 21, 23 and the second hinge shafts 22, 24 to provide synchronous rotation means 30a, 30b and suction means 40a, 40b, 40c, 40d are assembled.

As shown in FIG. 4 with reference to FIG. 7, the biaxial portion 20 of the biaxial hinge device 6 includes a biaxial portion 20a having first and second hinge shafts 21 and 22, and first and second hinge shafts. and a biaxial portion 20b having 23,24. The two-axis portions 20a and 20b of the two-axis hinge device 6 are assembled in the same manner using common parts, although their axial directions are opposite to each other. Therefore, the biaxial portion 20a having the hinge shafts 21 and 22 will be described in detail below, and redundant description of the biaxial portion 20b having the hinge shafts 23 and 24 will be omitted.

The biaxial portion 20a of the biaxial hinge device 6 has synchronous rotation means 30a, and the biaxial portion 20b has synchronous rotation means 30b. As described above, the synchronous rotation means 30a of the two-shaft portion 20a and the synchronous rotation means 30b of the two-shaft portion 20b are assembled in the same manner using common parts, although their axial directions are opposite. Therefore, hereinafter, the synchronous rotation means 30a of the two-shaft portion 20a will be described in detail, and redundant description of the synchronous rotation means 30b of the two-shaft portion 20b will be omitted.

Further, the biaxial portion 20a of the biaxial hinge device 6 has suction means 40a and 40b, and the biaxial portion 20b has suction means 40c and 40d. As described above, the suction means 40a and 40b of the double shaft portion 20a and the suction means 40c and 40d of the double shaft portion 20b are opposite in axial direction, but are assembled identically using common parts. there is Also, the two suction means 40a and 40b of the biaxial portion 20a are assembled in the same manner using common parts although their positions on the hinge shafts 21 and 22 are different. For this reason, the suction means 40a on one side of the biaxial portion 20a will be described in detail below, and redundant description of the remaining suction means 40b, 40c, and 40d will be omitted.

As shown in FIG. 9, recesses 13a and 14a and pin holes 26d and 27d are provided at both ends in the left-right direction of the first and second opening/closing members. As shown in FIG. 5 , the first opening/closing member 13 has one end fixed to the first hinge shaft 21 via the first rotation link member 26 and rotates integrally with the first hinge shaft 21 . A flat shaft portion 21a is formed at the end portion of the first hinge shaft 21 for restricting rotation. The rotation of the first hinge shaft 21 is transmitted to the first rotation link member 26 by press-fitting the flat shaft portion 21 a into the rotation center flat hole 26 e of the first rotation link member 26 . By inserting the pin 26a through the pin hole 26b at the rotating end of the first rotary link member 26 and the roller 28 and press-fitting it into the pin hole 26d of the first opening/closing member 13, the first rotary link member 26 is rotated. A moving end is pivotally supported by the first opening/closing member 13, and at the same time, a roller 28 is rotatably provided.

As shown in FIGS. 6A and 6B, the first opening/closing member 13 is held in a box-shaped space surrounded by the first slider 15 and the slider cover 17 . The first slider 15 and the slider cover 17 can slide along the first opening/closing member 13 to the rear end side and the front end side. The roller 28 is driven to rotate on the contact side, thereby reducing friction with the first slider 15 and the slider cover 17 and facilitating the sliding of the first slider 15 .

Screws 17e, 17e, 17e, and 17e are passed through the round holes 17f, 17f, 17f, and 17f of the slider cover 17, and the female screws 17g, 17g, 17g, and 17g of the first slider 15 are connected to the first slider 15 and the slider cover 17. It is fixed by tightening. First side blocks 15a and 15b, which constitute guide means 50 and 60, are fixed to both ends of the first slider 15 and the slider cover 17, respectively. As shown in FIG. 17, the first side block 15a is formed with internal threads 15f, 15i, 15i, 17c and 17c and fixed with positioning pins 15j and 15j. The first side blocks 15a and 15b are attached to the first slider 15 by inserting positioning pins 15j and 15j into pin holes 15k and 15k shown in FIG. For the slider cover 17, screws 17a, 17a are inserted into the screw holes 17b, 17b and tightened to the female screws 17c, 17c, so that the first slider 15 and the slider cover 17 are fixed to the left and right ends. there is As shown in FIG. 11, the slider cover 17 is formed with guide grooves 17h and 18h for guiding the guided projections 13h and 14h of the first and second opening/closing members 13 and 14, respectively.

The second opening/closing member 14 has one end fixed to the second hinge shaft 22 via a second rotation link member 26 and rotates integrally with the second hinge shaft 22 . A flat shaft portion 22a is formed at the end portion of the second hinge shaft 22 for restraining rotation. The rotation of the second hinge shaft 22 is transmitted to the second rotation link member 27 by press-fitting the flat shaft portion 22 a into the rotation center flat hole 27 e of the second rotation link member 27 . By inserting the pin 27a through the pin hole 27b at the rotating end of the second rotary link member 27 and the roller 28 and press-fitting it into the press-fitting hole 27d of the second opening/closing member 14, the second rotary link member 27 is rotated. A moving end is pivotally supported by the second opening/closing member 14, and at the same time, a roller 28 is rotatably provided.

As shown in FIGS. 6A and 6B, the second opening/closing member 14 is held in a box-shaped space surrounded by the second slider 16 and the slider cover 18 . The second slider 16 and the slider cover 18 can slide along the second opening/closing member 14 to the rear end side and the front end side. The roller 28 is driven to rotate on the contact side, thereby reducing friction with the second slider 16 and the slider cover 18 and facilitating the sliding of the second slider 16 .

Screws 18e, 18e, 18e, and 18e are passed through the round holes 18f, 18f, 18f, and 18f of the slider cover 18, and the female screws 18g, 18g, 18g, and 18g of the second slider 16 are connected to the second slider 16 and the slider cover 18. It is fixed by tightening. Second side blocks 16a and 16b constituting guide means 50 and 60, which will be described later, are fixed to both ends of the second slider 16 and the slider cover 17, respectively. As shown in FIG. 18, the second side block 16a is formed with internal threads 16f, 16i, 16i, 17c and 17c and fixed with positioning pins 16j and 16j. The second side blocks 16a and 16b are attached to the second slider 16 by inserting positioning pins 16j and 16j into pin holes 16k and 16k shown in FIG. For the slider cover 17, the second slider 15 and the slider cover 17 are fixed to the lateral ends of the second slider 15 and the slider cover 17 by inserting screws 17a, 17a into the screw holes 17b, 17b and tightening the female screws 17c, 17c. there is

Next, the synchronous rotation means 30a will be described in detail. As shown in FIGS. 12(a) and 12(b), the first hinge shaft 21 and the second hinge shaft 22 are formed with round shaft portions 21d and 22d adjacent to the screw cams 31 and 32, respectively. The screw cams 31 and 32 are formed with symmetric first and second spiral grooves 31a and 32a.

As shown in FIG. 14( a ), the interlocking member 35 is a cam follower for the screw cams 31 and 32 , and includes a guide hole 35 a of the first hinge shaft 21 , a guide hole 35 b of the second hinge shaft 22 , and a first hinge shaft 22 . and a ridge portion 35c that fits the second spiral grooves 31a and 32a. As shown in FIGS. 7(a) and 7(b), the interlocking member 35 rotatably holds the round shaft portion 21d of the first hinge shaft 21 and the round shaft portion 22d of the second hinge shaft 22 so as not to rotate. It is slidable in the axial direction while being held. When the first hinge shaft 21 rotates, the ridge portion 35c is driven in the axial direction to move the interlocking member 35 in the axial direction. 32a is axially driven to rotate the second hinge shaft 22; The first and second hinge shafts 21 and 22, in which the common interlocking member 35 is meshed with the first and second spiral grooves 31a and 32a, transmit rotation in both directions and rotate synchronously.

As shown in FIG. 7A, at the open position P2, the interlocking member 35 slides toward the guide means 50 (left side in the drawing) and is separated from the screw cams 31 and 32. As shown in FIG. In the process of raising the brackets 6d and 6e upward from the open position P2 and closing them toward the closed position P1 shown in FIG. right). As shown in FIG. 7(b), at the closed position P1, the interlocking member 35 slides to the opposite side of the guide means 50 and is positioned close to the screw cams 31 and 32. As shown in FIG.

Note that the synchronous rotation means 30a can be replaced with another known synchronous rotation means used in a two-axis hinge of an electronic device. The synchronous rotation means 30a may be replaced with, for example, the gear mechanism disclosed in Patent Document 3 or another gear mechanism.

Next, the suction means 40a will be described in detail. As shown in FIGS. 12(a) and 12(b), the first hinge shaft 21 and the second hinge shaft 22 have a stepped portion 21e formed at the boundary between the small diameter portions 21b, 21b and the round shaft portions 21d, 22d. Flat shaft portions 21c and 22c are formed between 22e and small diameter portions 21b and 22b. As shown in FIGS. 7A and 7B, the flat shaft portions 21c and 22c are provided with suction means 40a. The suction means 40a controls the overlapping of the two pairs of rotating cams 41, 41 and the cam plate 42 within a distance restricted at both ends by the hold block 25 and the above-described stepped portions 21e, 22e by the first and second elastic forces. The members 43, 43 apply pressure in the axial direction.

As shown in FIGS. 12(a) and 12(b), the first hinge shaft 21 and the second hinge shaft 22 have stepped portions 21f and 22f at the ends of the screw cams 31 and 32 and small diameter portions 21b and 21b. Flat shaft portions 21c and 22c are also formed therebetween. As shown in FIGS. 7A and 7B, the flat shaft portions 21c and 22c are provided with suction means 40b. The suction means 40b controls the overlapping of the two pairs of rotating cams 41 and 41 and the cam plate 42 within the distance restricted at both ends by the stepped portions 21f and 22f and the hold block 25 described above. , 43 in the axial direction.

As shown in FIG. 15, since a flat hole 41a with a D-cut on both sides is formed in the center of the rotating cam 41, the rotating cams 41, 41 inserted into the flat shaft portions 21c, 22c are inserted into the first hinge shaft 21. Alternatively, it rotates integrally with the second hinge shaft 22 . On the other hand, as shown in FIG. 16, the cam plate 42 is formed with a pair of round holes 42a, 42a. 2 hinge shaft 22 is rotatably held and kept non-rotating.

As shown in FIG. 15, the surface of the rotary cam 41 facing the cam plate 42 is formed with two protrusions 41b, 41b and two recesses 41c, 41c. On the other hand, as shown in FIG. 16, the surface of the cam plate 42 facing the rotating cam 41 is formed with two protrusions 42b, 42b and two recesses 42c, 42c.

In the rotation range of about 90 degrees each of the first hinge shaft 21 and the second hinge shaft 22 that rotate symmetrically via the interlocking member 35, the elastic member 43 is provided in the intermediate region between the closed position P1 and the open position P2. An angular range is formed in which the protrusions 41b, 41b and the protrusions 42b, 42b mutually climb the slope and overcome the peak with compression. Thus, the orientations of the rotating cams 41, 41 and the cam plate 42 in the left-right direction, the up-down direction, and the front-rear direction are set.

At the phase position where the peaks of the protrusions 41b, 41b of the rotating cam 41 and the protrusions 42b, 42b of the cam plate 42 meet, the elastic member 43 is compressed to the maximum, and the cam plate 42 and the rotating cam 41 overlap each other. The maximum pressure is applied to Rotating cams 41, 41, cam plate 42, and first and second elastic members 43, 43 are arranged as such.

As shown in FIG. 7A, at the open position P2, the protrusions 41b, 41b of the rotating cam 41 and the recesses 42c, 42c of the cam plate 42 are engaged with each other, and the recesses 41c, 41c of the rotating cam 41 and the protrusions of the cam plate 42 are engaged. The portions 42b, 42b are engaged with each other. In the predetermined range on the open position P2 side, the phase position of the rotating cam 41 is strongly pulled toward the open position P2 where the pressing force applied by the elastic member 43 to the cam plate 42 and the rotating cam 41 is minimized.

As shown in FIG. 7B, even at the closed position P1, the projections 41b, 41b of the rotating cam 41 and the recesses 42c, 42c of the cam plate 42 mesh with each other, and the recesses 41c, 41c of the rotating cam 41 and the projections of the cam plate 42 are engaged. The portions 42b, 42b are engaged with each other. Then, in the predetermined range on the closed position P1 side, the phase position of the rotating cam 41 is strongly pulled toward the closed position P1 where the pressing force applied by the elastic member 43 to the cam plate 42 and the rotating cam 41 is minimized.

It should be noted that the suction means 40a can be replaced with another known suction means used in a biaxial hinge of an electronic device. The suction means 40a may replace the first and second elastic members 43, 43 with a stack of spring washers. The suction means 40a has diametrical unevenness formed on the outer circumference of the rotor, and the unevenness on the inner circumference of the rotor is meshed with the unevenness on the outer circumference of the rotor to form a non-rotating elastically deformable body that restricts the rotation of the rotary cam. can be replaced by suction means provided on the outside of the

Next, the guide means 50, 60 will be described in detail. As described above, the guide means 50 and 60 are mechanisms for sliding the first and second sliders 15 and 16 to the front end side and the rear end side as the biaxial hinge device 6 is opened and closed by manual operation. . As shown in FIG. 6( a ), the center block 11 of the biaxial hinge device 6 rotatably supports the first and second hinge shafts 21 and 23 via hold blocks 25 . The first and second opening/closing members 13 and 14 rotate integrally with the first and second hinge shafts 21 and 23 via the first and second rotating link members 26 and 27, respectively.

On the other hand, as described above, the first and second slide members 15 and 16 are attached to the first and second opening/closing members 13 and 14 so as to be slidable toward the front end side and the rear end side. and the second hinge shafts 21, 23 as the center, integrally with the first and second opening/closing members 13, 14. Guide members 54 , 64 , 55 , 65 as first and second rotation guide members are fixed to both ends of the first and second slide members 15 , 16 in the axial direction. The guide means 50, 60 are interlocked with the rotation of the guide members 54, 64, 55, 65 to move the guide members 54, 64, 55, 65 to the front end side and the rear end side, respectively. 2 Slide the sliders 15 and 16 to the front end side and the rear end side.

As shown in FIG. 4(a), a guide means 50 is provided at one end of the biaxial hinge device 6, and a guide means 60 is provided at the other end, sandwiching the two shaft portions 20a and 20b in the axial direction. there is The guide means 50 has guide members 51 , 52 , 53 , 54 , 55 . The guide member 51 is a semicircular fixed guide member provided at the axial end of the center block 11 that rotatably supports the first and second hinge shafts 21 and 22 . The guide members 54, 55 are first and second rotation guide members provided on the rotation center side of the first and second side blocks 15a, 16a fixed to the first and second sliders 15, 16, respectively. . The guide members 52 and 53 are first and second relay guide members sandwiched between the first and second guide members 51 and the first and second guide members 54 and 55 and superimposed on each other. On the other hand, the guide means 60 has guide members 61, 62, 63, 64 and 65 as shown in FIG. It is Therefore, hereinafter, the guide means 50 will be described in detail, and redundant description of the guide means 60 will be omitted.

As shown in FIG. 8A , a guide member 51 is provided at one end of the center block 11 and a guide member 61 is provided at the other end of the center block 11 . As shown in FIG. 8(c), the guide member 51 is formed with arc-shaped guide grooves 51e and 51g. 51f and 51h are formed. The guide grooves 51e and 51g of the center block 11 mesh with the guided projections 52a and 53a of the guide members 52 and 53 shown in FIGS. making it slidable. The guide grooves 51e and 51g of the center block 11 move the first and second sliders 15 and 16 to the first and second hinge shafts 21 and 22 in the axial direction of the first and second hinge shafts 21 and 22. Guiding in a circular arc in each vertical plane. The regulation grooves 51f and 51h of the center block 11 are engaged with the engagement projections 52b and 53b of the guide members 52 and 53 shown in FIGS. Regulate the range.

The guide grooves 51e and 51g and the guided projections 52a and 53a are formed between the tangent lines L1 and L2 at both ends of the semicircular arc 5e formed by bending the flexible display sheet 5 at the closed position P1 of the biaxial hinge device 6 and the tangent line L3 at the vertex. It has an arc shape with two intersections as centers C1 and C2, respectively. That is, in the guide members 51, 52, 53, 54 and 55, the guide grooves 51e, 51g, 52d and 53d and the guided projections 52a, 53a, 54a and 55a are positioned so that the first and second housings 2 and 3 are open. The length of the supporting surface of the flexible display sheet 5 along the first and second sliders 15 and 16 is designed to be equal between P2 and the closed position P1. In one example of such a design, the guide grooves 51e, 51g, 52d, 53d and the guided protrusions 52a, 53a, 54a, 55a are arranged so that the flexible display sheet 5 is in the closed position P1 of the first and second housings 2, 3. A semicircular arc 5e formed by bending has two intersections of tangent lines L1 and L2 at both ends and a tangent line L3 at the vertex, respectively, which are center C1 and C2.

As shown in FIGS. 17 and 18, the guide members 54 and 55 are formed symmetrically, the guide members 54 and 65 are formed identically, and the guide members 55 and 64 are formed identically. there is As shown in FIG. 17, the guide member 54 is formed with an arcuate guided projection 54a on the side of the guide member 52 shown in FIG. An engaging projection 54b is formed at one end of the arc-shaped guided projection 54a. As shown in FIG. 18, the guide member 55 is formed with an arcuate guided projection 55a on the side of the guide member 53 shown in FIG. An engaging projection 55b is formed at one end of the arc-shaped guided projection 55a.

As shown in FIGS. 19 and 20, the guide members 52 and 53 are formed symmetrically, the guide members 52 and 63 are formed identically, and the guide members 53 and 62 are formed identically. there is As shown in FIG. 19, the guide member 52 has an arcuate guided projection 52a formed on the center block 11 side, and an arcuate guide groove 52d formed on the guide member 54 side shown in FIG. The above-described engaging projection 52b is formed at one end of the arc-shaped guided projection 52a. In addition, the guide member 52 is formed with a restricting groove 52e that is biased toward one end of the arc-shaped guide groove 52d and formed deep in a part of the guide groove 52d. The restriction groove 52e engages with the engagement protrusion 54b of the guide member 54 shown in FIG. 17 to restrict the sliding range of the guide member 54 along the guide groove 52d. As shown in FIG. 20, the guide member 53 has an arcuate guided projection 53a formed on the center block 11 side, and an arcuate guide groove 53d formed on the guide member 55 side shown in FIG. The above-described engaging projection 53b is formed at one end of the arc-shaped guided projection 53a. Further, the guide member 53 is formed with a restricting groove 53e formed by deepening a part of the guide groove 53d so as to be biased toward one end of the arc-shaped guide groove 53d. The restriction groove 53e engages with the engagement projection 55b of the guide member 55 shown in FIG. 18 to restrict the sliding range of the guide member 55 along the guide groove 53d.

As shown in FIGS. 4(a) and 4(b), the biaxial hinge device 6 is pivotally supported by a guide member 51, and its rotating end is slidable relative to the first and second side blocks 15a and 16a. There are first and second slide link members 56, 57 provided on the . The first and second slide link members 56 and 57 are provided at both ends of the guide means 50 and 60 in the axial direction. The rotating pin 51a is inserted into the shaft hole 51b of the first slide link member 56 and the shaft hole 51c of the second slide link member 57, and the screw at the tip of the rotating pin 51a is threaded into the female thread 51d of the guide member 51 (61). By tightening, the first and second slide link members 56 and 57 are rotatably attached to the center block 11 .

On the other hand, the rotating ends of the first and second slide link members 56 and 57 slide while being guided by the guide grooves 15m and 16m of the guide members 54 and 55, thereby moving the front ends of the first and second sliders 15 and 16. Absorbs sliding to the side and the rear end side. The tips of slide pins 56a, 57a which pass through the slide groove covers 19, 19 from the side of the guide grooves 15m, 16m are crimped and fixed to mounting holes 56c, 57c of the first and second slide link members 56, 57, respectively. Screws 15d, 16d are passed through the screw holes 15e, 16e of the slide groove covers 19, 19 and tightened to the female screws 15f, 16f so that the slide pins 56a, 57a are inserted into the guide grooves of the first and second side blocks 15a, 16a. It is assembled so that it can slide along 15m and 16m.

The slide pins 56a, 57a move along the guide grooves 15m, 16m between the closed position P1 shown in (a) of FIG. 21 and the open position P2 shown in (b) of FIG. , 54 and 55, the load on the guide grooves 51e, 51g, 52d and 53d and the guided projections 52a, 53a, 54a and 55a is reduced.

The operation of the guide means 50 from the closed position P1 shown in FIG. 22(a) to the intermediate position P3 shown in FIG. 22(b) will be described. Since the guide members 52 and 53 are superimposed on the guide member 51 and the arc-shaped guided projections 52a and 53a of the guide members 52 and 53 are engaged with the arc-shaped guide grooves 51e and 51g of the guide member 51, the guide member 52 , 53 can slide along the guide grooves 51 e and 51 g of the guide member 51 in an arc shape.

At the closed position P1 shown in FIG. At the intermediate position P3 shown in FIG. 22(b), the engaging projections 52b and 53b of the guide members 52 and 53 are in contact with the other ends of the regulation grooves 51f and 51h of the guide member 51, respectively. Since the movement range of the engaging protrusions 52b and 53b is restricted by the restriction grooves 51f and 51h, the range in which the guide members 52 and 53 can move along the guide grooves 51e and 51g is within the restriction grooves 51f and 51h. The range is 45 degrees from the closed position P1 to the intermediate position P3 in which the projections 52b and 53b can move.

The operation of the guide means 50 from the intermediate position P3 shown in FIG. 23(a) to the open position P2 shown in FIG. 23(b) will be described. The guide members 54 and 55 are superimposed on the guide members 52 and 53, and the arc-shaped guided projections 54a and 55a of the guide members 54 and 55 are engaged with the arc-shaped guide grooves 52d and 53d of the guide members 52 and 53. , guide members 54 and 55 are slidable in an arc shape along the guide grooves 52d and 53d of the guide members 52 and 53, respectively.

At the intermediate position P3 shown in FIG. 23(a), the engaging projections 54b and 55b of the guide members 54 and 55 are in contact with one ends of the regulation grooves 52e and 53e of the guide members 52 and 53, respectively. At the open position P2 shown in FIG. 23(b), the engaging projections 54b and 55b of the guide members 54 and 55 are in contact with the other ends of the regulation grooves 52e and 53e of the guide members 52 and 53, respectively. Since the movement range of the engaging protrusions 54b and 55b is restricted by the restricting grooves 52e and 53e, the moving range of the guide members 54 and 55 along the guide grooves 52d and 53d is determined by the restricting grooves 52e and 53e. The range is 45 degrees from the intermediate position P3 to the open position P2 in which 54b and 55b can move.

In practice, the arc-shaped slide of the guide members 52 and 53 with respect to the guide member 51 and the arc-shaped slide of the guide members 54 and 55 with respect to the guide members 52 and 53 are switched 100% at an intermediate position of 45 degrees. Instead, the slides of the guide members 52 and 53 and the slides of the guide members 54 and 55 between the closed position P1 and the open position P2 intermittently and alternately proceed intermittently and alternately by selecting the side with relatively low frictional resistance. do. However, even in this case, since the first and second hinge shafts 21 and 22 are symmetrically rotated by the synchronous rotating means 30a and 30b, the guide members 54 and 55 slide in an arc with respect to the guide member 51. proceed symmetrically.

22 and 23, if there are no engagement protrusions 52b, 53b, 54b, 55b, the guide means 50 is replaced by the guide members 52, 53 removed and the guide members 54, 55 directly attached to the guide member 51. Also in the embodiment in which the arcuate guide grooves 51e and 51g of the guide member 51 are engaged with the arcuate guided projections 54a and 55a of the guide members 54 and 55, the guide means 50 is aligned with the guide members 54 and 55. It is possible to realize the same guidance function as in the case of . Therefore, in the guide means 50 of the biaxial hinge device 6, the guide members 52 and 53 are arranged so that the arc-shaped guide grooves 51e and 51g of the guide member 51 and the arc-shaped guided projections 54a and 55a of the guide members 54 and 55 are aligned. In order to extend the range of supporting each other along the guide grooves 51e, 51g, and to arrange the engagement projections 52b, 53b, 54b, 55b for restricting the rotation range of the guide members 54, 55 in this extended range. can be understood to be provided in an auxiliary manner. Conversely, in the guide means 50 of the biaxial hinge device 6, the guide members 52 and 53 reduce the frictional resistance and rotation lock of the guide members 54 and 55 with respect to the guide member 51, and restrict the rotation range. is added in a compact manner. The first and second slide link members 56 and 57 described above further increase the number of points at which the guide member 51 supports the guide members 54 and 55 in parallel with the guide members 52 and 53 and the distance between the points. As a result, the frictional resistance and rotation lock of the guide members 54 and 55 against the guide member 51 are reduced.

Further, the guide grooves 51e and 51g and the guided projections 52a and 53a that mesh with each other have the same circular arc radius, and in the meshed state, the centers C1 and C2 of the circular arcs are shared. However, the guide grooves 52e and 53e, which engage with the guided projections 54a and 55a independently of the guide grooves 51e and 51g, do not necessarily have the same arc diameter as the guide grooves 51e and 51g (that is, the guided projections 52a and 52a). There is no need, and there is no need to share the center of the arc. Therefore, the tension state and floating state of the flexible display panel 5 in the process from the closed position P1 to the open position P2 may be adjusted by making the diameters and centers of these two types of arcs slightly different. Furthermore, guide means for guiding the first and second sliders 15 and 16 in an arcuate plane perpendicular to the axial direction with respect to the guide member 51 (first and second hinge shafts 21 and 22) are guide grooves. It is not limited to the combination of sliding contact with the guided projection. For example, it may be replaced with a mechanism in which the arc-shaped guided projection is supported by a plurality of rollers arranged along an arc-shaped movement locus and guided in an arc-shaped manner.

As described above, in the biaxial hinge device 6 according to one embodiment of the present invention, the guide means 50, 60 guide the first and second sliders 15, 16 to the first and second hinge shafts 21, 22. Since it is guided in a circular arc within a plane perpendicular to the axial direction, the first and second sliders 15 and 16 are moved to the front end side or the rear end side in conjunction with the opening/closing operation of the first and second housings 2 and 3. can be moved continuously. Since the guide means 50 and 60 are provided outside the first and second hinge shafts 21 and 22 in the axial direction, the axial regions of the first and second hinge shafts 21 and 22 are separated from the synchronous rotating means 30a and the suction means 30a. More can be allocated to means 40a, 40b. Further, since the number of hinge shafts is small, the rotation angle per hinge shaft accompanying opening and closing of the first and second housings 2 and 3 is large. It is easy to incorporate synchronous rotating means and suction means capable of powerful operation. Furthermore, since the number of hinge shafts is small, the biaxial hinge device 6 capable of opening and closing the first and second housings 2 and 3 with the flexible display sheet 5 on the outside can be configured with a small number of parts.

The biaxial hinge device 6 has a simple structure in which guide grooves and projections to be guided are engaged to achieve arc-shaped guidance, and a plurality of guide members 51, 52, 53, 54, and 55 are overlapped in the axial direction for guidance. Due to the construction of the means 50, the axial thickness of the guide means 50 can be reduced to allocate more axial space to the first and second hinge shafts 21,22. Therefore, as described above, it is easy to improve the performance of the synchronous rotation means 30a and the suction means 40a and 40b.

The biaxial hinge device 6, as shown in FIG. Since the first and second slide members 15 and 16 are guided in arcs centered on the two intersection points C1 and C2 of L2 and the tangent line L3 of the vertex, respectively, the first and second slide members 15 and 16 are attached with the flexible display sheet 5 facing outward. The second housings 2 and 3 can be connected so that they can be opened and closed while keeping the length of the supporting surface of the flexible display sheet 5 substantially constant. Then, the first and second housings 2 and 3 are symmetrically opened and closed, and the opening angle of the biaxial hinge device 6 is forcibly retracted to the closed position P1 and the open position P2. It is possible to provide a biaxial hinge device 6 with good operability that can achieve the technical requirement of providing a comfortable response to the opening and closing operations of , 3 with a simpler configuration.

In the biaxial hinge device 6, as described above, the guide members 51, 52, 53, 54, 55 have the guide grooves 51e, 51g, 52d, 53d and/or the guided projections 52a, 53a, 54a, 55a, The guide grooves 51e, 51g, 52d, 53d and the guided projections 52a, 53a, 54a, 55a are meshed with each other and overlapped in the axial direction. Therefore, a layout in which the guide means 50 and 60 are configured thin and the first and second hinge shafts 21 and 22 are arranged at intervals in the axial direction of the guide means 50 and 60 is made possible.

The biaxial hinge device 6 has an elastic sheet 4 fixed to the first and second sliders 15 and 16 to support the lower surface of the flexible display sheet 5 . Therefore, a well-arranged arc can be formed on the flexible display sheet 5 at the closed position P1. In addition, it is easy to keep the flexible display sheet 5 flat with the gap between the first and second sliders 15 and 16 at the open position P2.

The biaxial hinge device 6 has one end fixed to the ends of the first and second hinge shafts 21 and 22 and the other end pivotally supported by the rotating ends of the first and second opening/closing members 13 and 14 . and second rotary link members 26, 27, and the other ends of the first and second rotary link members 26, 27 are axially coupled with rollers 28 that rotatably contact the first and second sliders 15, 16. I am supporting you. Therefore, the first and second opening/closing members 13 and 14 can be rotated with high rigidity, and the first and second sliders 15 and 16 slide smoothly with respect to the first and second opening/closing members 13 and 14 .

Since the present invention is configured as described above, the first housing and the second housing which are connected so as to be openable and closable are synchronously opened and closed, and the suction torque is generated near the closed position P1 and near the open position P2 at the time of opening and closing. It has a function to position the first housing and the second housing at the closed position P1 and the open position P2 by creating and clicking stop, and is provided over both surfaces of the first housing and the second housing. A biaxial hinge device capable of opening and closing without causing bending of a flexible display sheet to be lifted or pulling between a first housing and a second housing, and an electronic device using this biaxial hinge device It is suitable for use as a device.

1 mobile phone (electronic equipment)
2 first housing 3 second housing 4 elastic sheet 5 flexible display sheet 6 biaxial hinge device 6a, 6b biaxial hinge device 6c screw 6d, 6e bracket 11 center block 12 back side cover 13 first opening/closing member 14 second 2 Opening/Closing Member 15 First Slider 15a, 15b First Side Block 16 Second Slider 16a, 16b Second Side Block 17, 18 Slider Cover 20, 20a, 20a Two Shafts 21, 23 First Hinge Shaft 22, 24 Second hinge shaft 25 hold block 25a, 25b hold member 26 first rotary link member 27 second rotary link member 28 roller 30a, 30b synchronous rotation means 31, 32 screw cam 31a first spiral groove 32a second spiral groove 35, 36 interlocking member (cam follower)
40a, 40b, 40c, 40d suction means 41 rotating cam 42 cam plate 43 elastic member 50, 60 guide means 51, 61 guide member (fixed guide member)
51e, 51g guide grooves 51f, 51h regulation grooves 52, 62 guide member (first relay guide member)
52a guided projection 52b engagement projection 52d guide groove 52e regulation groove 53, 63 guide member (second relay guide member)
53a guided projection 53b engagement projection 53d guide groove 53e regulation groove 54, 64 guide member (first rotation guide member)
54a guided projection 54b engagement projection 55, 65 guide member (second rotation guide member)
55a Guided projection 55b Engagement projection 56 First slide link member 57 Second slide link member

Claims (8)

A biaxial hinge that connects the rear ends of the first and second housings and opens and closes the front ends thereof in an electronic device in which the flexible display sheet is attached to the outside across the first and second housings a device,
first and second hinge shafts, synchronous rotation means provided between the first and second hinge shafts for synchronously rotating the first and second hinge shafts in opposite directions , and the first and second hinges suction means for rotatingly urging the first and second hinge shafts from a predetermined rotation angle to the open position and the closed position of the first and second housings;
first and second opening/closing members provided to be integrally rotatable with respect to the first and second hinge shafts;
first and second sliders fixed to the first and second housings, respectively, and slidable along the first and second opening and closing members toward the front end side and the rear end side; ,
The first and second sliders driven by the suction means are guided to the front end side in accordance with the operation of opening the first and second housings, and are accompanied with the operation of closing the first and second housings. guide means for guiding the first and second sliders driven by the suction means to the rear end side,
The guide means is provided outside the first and second hinge shafts in the axial direction, and guides the first and second sliders relative to the first and second hinge shafts in a plane perpendicular to the axial direction. characterized by guiding each in an arc with
Biaxial hinge device. The guide means includes first and second opening/closing members that rotate via the first and second hinge shafts, and mutual guide grooves and/or guided projections superimposed on the first and second opening/closing members, respectively. characterized by having first and second guide members that slide in a mutually engaged state by meshing ,
The biaxial hinge device according to claim 1. The plurality of guide members are
a semicircular fixed guide member provided at an axial end of a center block that rotatably supports the first and second hinge shafts;
first and second rotation guide members respectively provided on the rotation center side of the first and second side blocks fixed to the first and second sliders;
First and second relay guide members sandwiched between the fixed guide member and the first and second rotary guide members and superimposed respectively,
The biaxial hinge device according to claim 2. The center block supports two sets of the first and second hinge shafts spaced apart in the axial direction, and a wiring that intersects the two sets of the first and second hinge shafts in the axial direction. characterized by having a wiring holding part that can be held,
The biaxial hinge device according to claim 3 . first and second rotating link members having one end fixed to the ends of the first and second hinge shafts and the other end pivotally supported by the rotating ends of the first and second opening/closing members;
The other ends of the first and second rotary link members are pivotally supported together with rollers rotatably contacting the first and second sliders,
The biaxial hinge device according to claim 3 . The synchronous rotation means is
first and second helical grooves provided symmetrically on the first and second hinge shafts;
and an interlocking member provided movably in the axial direction while being guided by the first and second hinge shafts, and engaging with the first and second spiral grooves,
The biaxial hinge device according to claim 1. The suction means is
first and second rotating cams having predetermined unevenness and provided so as to be rotatable integrally with respect to the first and second hinge shafts;
a cam plate having projections and depressions that mesh with the predetermined projections and depressions, rotatably supporting the first and second hinge shafts, and bringing the projections and depressions into contact with the first and second rotary cams;
characterized by having first and second elastic means for respectively pressing the superimposed first and second rotating cams and the cam plate,
The biaxial hinge device according to claim 1. An electronic device using the biaxial hinge device according to any one of claims 1 to 7 .

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