2-axis torque hinge
Patent Information
- Authority / Receiving Office
- JP · JP
- Patent Type
- Patents
- Current Assignee / Owner
- SUGATSUNE IND CO LTD
- Filing Date
- 2022-09-01
- Publication Date
- 2026-08-03
AI Technical Summary
【0008】 本発明によれば、第1軸と第2軸に同時に働く締まりトルク(T1)と緩みトルク(T2)を利用して、第1軸と第2軸を片方ずつ順番に動かすことができる。
Smart Images
Figure 0007899191000001 
Figure 0007899191000002 
Figure 0007899191000003
Abstract
Description
Technical Field
[0004] , , , , , , ,
[0006] , , , ,
[0005] , , , , , ,
[0001] The present invention relates to a two-axis torque hinge including a first body, an intermediate body rotatably connected to the first body about a first axis, and a second body rotatably connected to the intermediate body about a second axis.
Background Art
[0002] Since a two-axis torque hinge has two axes of a first axis and a second axis, the opening angle can be made larger than that of a single-axis torque hinge having only one axis. The applicant has proposed a two-axis torque hinge described in Patent Document 1 as a two-axis torque hinge.
[0003] This two-axis torque hinge includes a plurality of stacked first friction elements engaged with the first axis and a plurality of stacked second friction elements engaged with the second axis. The first friction element and the second friction element are provided to apply torque to the first axis and the second axis. By applying torque to the first axis and the second axis, any opening angle of the second body with respect to the first body can be maintained, and / or the impact when the second body opens and closes with respect to the first body can be mitigated.
Prior Art Documents
Patent Documents
[0004]
Patent Document 1
Summary of the Invention
Problems to be Solved by the Invention
[0005] By the way, in a two-axis torque hinge, in order to smoothly open and close the second body, it is required that the first axis and the second axis can be moved one by one in order.
[0006] The present invention has been made in view of the above problems, and provides a two-axis torque hinge that can move the first axis and the second axis one at a time in sequence. [Means for solving the problem]
[0007] To solve the above problems, one aspect of the present invention provides a two-axis torque hinge comprising a first body, an intermediate body rotatably connected to the first body about a first axis, and a second body rotatably connected to the intermediate body about a second axis, wherein the two-axis torque hinge comprises a plurality of stacked first friction elements that engage with the first axis and a plurality of stacked second friction elements that engage with the second axis, the first friction elements having arms wrapped around the first axis and configured such that the tightening torque when the first axis rotates relative to the first friction element in the tightening direction is greater than the loosening torque when it rotates relative to the first friction element in the loosening direction, the second friction elements having arms wrapped around the second axis and configured such that the tightening torque when the second axis rotates relative to the second friction element in the tightening direction is greater than the loosening torque when it rotates relative to the second friction element in the loosening direction, and when the second body rotates relative to the first body in one direction, a tightening torque acts on one of the first axis and the second axis and a loosening torque acts on the other. The first and second axes are not connected by a link so that they can rotate freely relative to each other. It is a two-axis torque hinge. [Effects of the Invention]
[0008] According to the present invention, by utilizing the tightening torque (T1) and loosening torque (T2) acting simultaneously on the first and second axes, the first and second axes can be moved sequentially, one at a time. [Brief explanation of the drawing]
[0009] [Figure 1] This is an external perspective view of a two-axis torque hinge according to the first embodiment of the present invention. [Figure 2] This is an exploded perspective view of the two-axis torque hinge of this embodiment. [Figure 3] This is a longitudinal cross-sectional view of the two-axis torque hinge of this embodiment (cross-sectional view along line III-III in Figure 1). [Figure 4] Figure 3 is a magnified view of the intermediate. [Figure 5] This is an operation diagram of the two-axis torque hinge of this embodiment (Figure 5(a) shows the open position, Figure 5(b) shows the 90° open position, and Figure 5(c) shows the closed position). [Figure 6] This is an operation diagram of the two-axis torque hinge of this embodiment (Figure 6(a) shows the open position, Figure 6(b) shows the 90° open position, and Figure 6(c) shows the closed position). [Figure 7] This is a diagram illustrating the operation of a conventional two-axis torque hinge (Figure 7(a) shows the open position, Figures 7(b1) and (b2) show the 90° open position, and Figure 7(c) shows the closed position). [Figure 8] This is an exploded perspective view of a two-axis torque hinge according to a second embodiment of the present invention. [Figure 9] This is an enlarged view of an intermediate part of a two-axis torque hinge according to a second embodiment of the present invention. [Figure 10] This is an external perspective view of a two-axis torque hinge according to a third embodiment of the present invention. [Figure 11] This is an exploded perspective view of a two-axis torque hinge according to a third embodiment of the present invention. [Figure 12] This is an enlarged view of the friction plate according to the third embodiment of the invention. [Modes for carrying out the invention]
[0010] The two-axis torque hinge of the present invention will be described in detail below with reference to the attached drawings. However, the two-axis torque hinge of the present invention can be embodied in various forms and is not limited to the embodiments described herein. These embodiments are provided with the intention that those skilled in the art will be able to fully understand the invention by making full disclosures in the specification. (First Embodiment)
[0011] FIG. 1 shows an external perspective view of a biaxial torque hinge 10 according to a first embodiment of the present invention. The biaxial torque hinge 10 includes a first main body 1, an intermediate body 3, and a second main body 2. The intermediate body 3 is rotatably connected to the first main body 1 around a first axis 4 (see FIG. 2). The second main body 2 is rotatably connected to the intermediate body 3 around a second axis 5 (see FIG. 2).
[0012] The biaxial torque hinge 10 of the present embodiment is used to open and close a movable body such as a table, a counter, a door, a lid, etc. of a vehicle such as furniture or a train with respect to a fixed body. It is also used to open and close a display of a notebook computer with respect to the computer main body. The use of the biaxial torque hinge 10 of the present embodiment is not limited to these.
[0013] FIG. 2 shows an exploded perspective view of the biaxial torque hinge 10. 1 is the first main body, 2 is the second main body, 3 is the intermediate body, 4 is the first axis, 5 is the second axis, 6 is the stacked first friction element, and 7 is the stacked second friction element.
[0014] The first main body 1 includes a pair of first divided bodies 1a and 1b. The first divided bodies 1a and 1b are formed in a substantially rectangular parallelepiped shape as a whole, and a notch 12 for avoiding interference with the intermediate body 3 is formed at its corner. Through holes 13 through which fastening members such as screws for attaching to a fixed body are passed are formed in the first divided bodies 1a and 1b.
[0015] The first axis 4 is non-rotatably fixed to the first divided bodies 1a and 1b. A plurality of stacked first friction elements 6 are engaged with the first axis 4. The cross section of the friction element engaging portion 4a of the first axis 4 is formed substantially circularly. Rotation prevention portions 4b and 4c are formed at both axial ends of the first axis 4, for example, by knurling. A D-cut portion 4c1 is formed in the rotation prevention portion 4c in addition to knurling. Rotation prevention holes 14 into which the rotation prevention portions 4b and 4c of the first axis 4 are inserted are formed in the first divided bodies 1a and 1b.
[0016] An intermediate body 3 is rotatably supported on a first shaft 4 via a first friction element 6. The intermediate body 3 is rotatable relative to the first main body 1, for example, within a range of approximately 90°. Rotation of the intermediate body 3 relative to the first main body 1 by more than approximately 90° is restricted by contact of the intermediate body 3 with wall surfaces 12a, 12b of a notch 12 of the first main body 1.
[0017] The intermediate body 3 includes a housing 15, a first friction element 6, and a second friction element 7. The housing 15 is formed with an elliptical cross-section. Accommodation holes 15a, 15b for accommodating the first friction element 6 and the second friction element 7 are formed in the housing 15. The first friction element 6 and the second friction element 7 accommodated in the housing 15 are fixed to the housing 15 by elastic pins 16, 17 having a C-shaped cross-section. The number of the first friction element 6 and the second friction element 7 is equal, but it is also possible to make them different. The shapes and arrangements of the first friction element 6 and the second friction element 7 will be described later.
[0018] Lids 18, 19 having holes through which the first shaft 4 and the second shaft 5 penetrate are attached to both axial ends of the intermediate body 3. The lid 18 is made of metal, and the lid 19 is made of resin. The lid 19 is provided to prevent contact between metals.
[0019] The second main body 2 also includes a pair of second divided bodies 2a, 2b that are divided into two parts. The second divided body 2a has substantially the same shape as the first divided body 1b. The second divided body 2b has substantially the same shape as the first divided body 1a. Stoppers 11 that abut against each other to determine the closed position (see FIG. 5(c)) of the two-axis torque hinge 10 are formed on the first divided bodies 1a, 1b and the second divided bodies 2a, 2b.
[0020] The second shaft 5 is fixed to the second divided parts 2a and 2b in a non-rotatable manner. The second shaft 5 is substantially parallel to the first shaft 4. Multiple stacked second friction elements 7 engage with the second shaft 5. The cross-section of the friction element engagement portion 5a of the second shaft 5 is formed to be substantially circular. The second shaft 5 is substantially identical in shape to the first shaft 4. Anti-rotation portions 5b and 5c are formed at both axial ends of the second shaft 5. The first shaft 4 and the second shaft 5 are not connected by a link. The first shaft 4 and the second shaft 5 can rotate freely relative to each other.
[0021] Figure 3 shows a longitudinal cross-sectional view of the two-axis torque hinge 10 of this embodiment. Figure 4 shows an enlarged view of the intermediate body 3 in Figure 3. As shown in Figure 4, the first friction element 6 comprises a connecting portion 6b and an arm 6a. The connecting portion 6b is formed in a substantially trapezoidal shape. The arm 6a has a base portion 6a1 and a tip portion 6a2 and is wrapped around the first axis 4. The base portion 6a1 of the arm 6a is integrally formed to the right side of the connecting portion 6b. The arm 6a curves in an arc from the base portion 6a1 to the tip portion 6a2. An opening a is formed between the tip portion 6a2 and the left side of the connecting portion 6b. The winding direction of the arm 6a from the base portion 6a1 to the tip portion 6a2 is clockwise (direction (1) in Figure 4).
[0022] When arm 6a is in a relaxed state, the diameter of the inner surface of arm 6a is smaller than the diameter of the outer surface of the first shaft 4. Therefore, arm 6a frictionally engages with the surface of the first shaft 4, applying radial compression to the first shaft 4.
[0023] In a preferred embodiment, the radial thickness of the tip portion 6a2 of the arm 6a is thinner than the radial thickness of the base portion 6a1. The radial thickness of the tip portion 6a2 is thicker than the axial thickness of the first friction element 6.
[0024] The cross-section of the housing hole 15a of the housing 15 substantially coincides with the outer surface of the first friction element 6. At the position of the arm 6a of the first friction element 6, a gap g is formed between the inner surface of the housing hole 15a and the outer surface of the first friction element 6. At the position of the connecting portion 6b, the inclined surface 6b1 of the connecting portion 6b and the inclined inner surface of the housing hole 15a are in direct contact by the elastic pin 16.
[0025] The second friction element 7, like the first friction element 6, comprises a connecting portion 7b and an arm 7a. The arm 7a has a base portion 7a1 and a tip portion 7a2 and is wrapped around the second shaft 5. The base portion 7a1 of the arm 7a is integrally formed to the left side of the connecting portion 7b. The arm 7a curves in an arc from the base portion 7a1 to the tip portion 7a2. An opening a is formed between the tip portion 7a2 of the arm 7a and the right side of the connecting portion 7b. The winding direction of the arm 7a from the base portion 7a1 to the tip portion 7a2 is clockwise (direction (2) in Figure 4). The winding direction of the arm 7a and the winding direction of the arm 6a are the same direction (clockwise). When the first friction element 6 is rotated approximately 180°, it overlaps with the second friction element 7.
[0026] The cross-section of the housing hole 15b of the housing 15 substantially coincides with the outer surface of the second friction element 7. At the position of the arm 7a of the second friction element 7, a gap g is formed between the inner surface of the housing hole 15b and the outer surface of the second friction element 7. At the position of the connecting portion 7b, the inclined surface 7b1 of the connecting portion 7b and the inclined inner surface of the housing hole 15b are in direct contact by the elastic pin 17.
[0027] In this embodiment, the tightening torque T1 when the first shaft 4 and the second shaft 5 rotate in the tightening direction is different from the loosening torque T2 when they rotate in the loosening direction. This will be explained below.
[0028] As shown in Fig. 4, when the second shaft 5 is rotated relative to the second friction element 7 in the tightening direction (3) (clockwise), the tip 7a2 of the arm 7a is pulled downward as shown by the dashed line (4) in Fig. 4 due to the friction with the second shaft 5, and the arm 7a comes to tighten the second shaft 5. For this reason, a large torque T1 acts on the second shaft 5.
[0029] When the second shaft 5 is rotated in the loosening direction (the direction opposite to (3) in Fig. 4), the tip 7a2 of the arm 7a is pulled upward opposite to the dashed line (4), and the tip 7a2 cannot compress the second shaft 5 and is deformed outward. For this reason, a small torque T2 (T2 < T1) acts on the second shaft 5.
[0030] Similarly, when the first shaft 4 is rotated relative to the first friction element 6 in the tightening direction, a large torque T1 acts on the first shaft 4, and when rotated in the loosening direction, a small torque T2 (T2 < T1) acts on the first shaft 4.
[0031] Also, in this embodiment, when a loosening torque T2 acts on one of the first shaft 4 and the second shaft 5, a tightening torque T1 acts on the other. This will be described below.
[0032] Fig. 5 shows an operation diagram of the two - shaft torque hinge 10 when the second body 2 is rotated from the open position to the closed position with respect to the first body 1. Fig. 5(a) shows the 180° open position, Fig. 5(b) shows the 90° open position, and Fig. 5(c) shows the closed position.
[0033] When the second body 2 in the open position shown in Fig. 5(a) is rotated in the closing direction, since the second shaft 5 tries to rotate together with the second body 2, a torque T2 in the loosening direction acts on the second shaft 5. At this time, since the first friction element 6 tries to rotate together with the intermediate body 3, a torque T1 in the tightening direction acts on the first shaft 4. For this reason, only the second shaft 5 rotates relative to the second friction element 7, and the second body 2 rotates with respect to the intermediate body 3 to the 90° open position shown in Fig. 5(b).
[0034] When the second body 2 rotates to the 90° open position shown in Figure 5(b), the second body 2 and the intermediate body 3 come into contact, restricting the relative rotation of the second shaft 5. When the second body 2 is further rotated in the closing direction, the first shaft 4 rotates relative to the first friction element 6, and the second body 2 and the intermediate body 3 rotate to the closed position shown in Figure 5(c). Note that the rotation of the first shaft 4 relative to the first friction element 6 is relative; in reality, the first friction element 6 rotates relative to the first shaft 4 which is fixed to the first body 1.
[0035] As described above, when opening the second body 2 relative to the first body 1, the tightening torque T1 and loosening torque T2 acting simultaneously on the first shaft 4 and the second shaft 5 can be used to move the first shaft 4 and the second shaft 5 one at a time in sequence.
[0036] When the second body 2, which is in the closed position as shown in Figure 5(c), is rotated in the opening direction, a tightening torque T1 acts on the second shaft 5 and a loosening torque T2 acts on the first shaft 4. As a result, the first shaft 4 rotates relative to the first friction element 6, and the second body 2 and the intermediate body 3 rotate to the 90° open position shown in Figure 5(b) relative to the first body 1. When the intermediate body 3 rotates to the 90° open position shown in Figure 5(b), the intermediate body 3 and the first body 1 come into contact, and the relative rotation of the first shaft 4 is restricted.
[0037] When the second body 2 is rotated further in the opening direction, the second shaft 5 rotates relative to the second friction element 7, and the second body 2 rotates relative to the intermediate body 3 to the open position shown in Figure 5(a).
[0038] As described above, when closing the second body 2 to the first body 1, the tightening torque T1 and loosening torque T2 acting simultaneously on the first shaft 4 and the second shaft 5 can be used to move the first shaft 4 and the second shaft 5 one at a time in sequence.
[0039] Furthermore, with the two-axis torque hinge 10 of this embodiment, the movement of the second body 2 can be made identical when opening and closing. This will be explained below.
[0040] Figure 6 shows the operation diagram of the two-axis torque hinge 10 of this embodiment. Note that Figure 6 shows the two-axis torque hinge 10 viewed from the opposite direction to that shown in Figure 5. The operation diagrams in Figure 5 and Figure 6 are substantially identical.
[0041] As described above, when the second body 2, which is in the open position shown in Figure 6(a), is closed, the second body 2 and the intermediate body 3 move through the 90° open position shown in Figure 6(b) to the closed position shown in Figure 6(c). When the second body 2, which is in the closed position shown in Figure 6(c), is opened, the second body 2 and the intermediate body 3 move through the 90° open position shown in Figure 6(b) to the open position shown in Figure 6(a). The posture of the second body 2 and the intermediate body 3 in the 90° open position shown in Figure 6(b) is the same whether the second body 2 is closed or opened.
[0042] Figure 7 shows the operation diagram of a conventional two-axis torque hinge described in Patent Document 1. In the conventional torque hinge, the torque acting on the first axis 4 and the torque acting on the second axis 5 are different. However, the first friction element 6 and the second friction element 7 are formed in a ring shape, and the tightening torque T1 and the loosening torque T2 are equal. Therefore, when the second body 2, which is in the open position shown in Figure 7(a), is closed, the second body 2 and the intermediate body 3 move through the 90° open position shown in Figure 7(b1) to the closed position shown in Figure 7(c). When the second body 2, which is in the closed position shown in Figure 7(c), is opened, the second body 2 and the intermediate body 3 move through the 90° open position shown in Figure 7(b2) to the open position shown in Figure 7(a). At the 90° open position shown in Figures 7(b1) and (b2), the posture of the second body 2 and the intermediate body 3 is different when the second body 2 is closed and when it is opened. (Second Embodiment)
[0043] Figure 8 shows an exploded perspective view of a two-axis torque hinge 20 according to a second embodiment of the present invention. 1 is the first body, 3 is the intermediate body, 2 is the second body, 4 is the first axis, and 5 is the second axis. The configuration of the first body 1, the second body 2, the first axis 4, and the second axis 5 is the same as that of the two-axis torque hinge 10 of the first embodiment, so the same reference numerals are used and their descriptions are omitted.
[0044] In the first embodiment of the two-axis torque hinge 10, the first friction element 6 and the second friction element 7 are formed separately, whereas in the second embodiment of the two-axis torque hinge 20, the first friction element 6 and the second friction element 7 are formed integrally. That is, the intermediate body 3 includes a friction plate 22 in which the first friction element 6 and the second friction element 7 are integrated.
[0045] As shown in Figure 9, the first friction element 6 has an arm 6a and is configured such that the tightening torque when the first shaft 4 rotates relative to the first friction element 6 in the tightening direction is greater than the loosening torque when it rotates relative to the first shaft 6 in the loosening direction. The arm 6a has a base 6a1 and a tip 6a2 and is wrapped around the first shaft 4. The base 6a1 of the arm is integrally formed to the right side of the connecting portion 6b. The arm 6a is curved in an arc from the base 6a1 to the tip 6a2.
[0046] The second friction element 7 has an arm 7a and is configured such that the tightening torque when the second shaft 5 rotates relative to the second friction element 7 in the tightening direction is greater than the loosening torque when it rotates relative to the second shaft 5 in the loosening direction. The arm 7a has a base 7a1 and a tip 7a2 and is wrapped around the second shaft 5. The base 7a1 of the arm 7a is integrally formed on the left side of the connecting portion 7b. The arm 7a is curved in an arc from the base 7a1 to the tip 7a2. The winding direction of the arm 7a from the base 7a1 to the tip 7a2 is the same as the winding direction of the arm 6a from the base 6a1 to the tip 6a2.
[0047] The housing 21 of the intermediate body 3 has a housing hole 21a for accommodating the friction plate 22. The cross-sectional shape of the housing hole 21a substantially coincides with the outer surface of the friction plate 22. The friction plate 22 is fixed to the housing 21 by an elastic pin 23. At the positions of the arms 6a and 7a, a gap g is created between the inner surface of the housing hole 21a and the outer surfaces of the arms 6a and 7a.
[0048] The two-axis torque hinge 20 of the second embodiment provides the same effects as the two-axis torque hinge 10 of the first embodiment. (Third embodiment)
[0049] Figure 10 shows an external perspective view of a two-axis torque hinge 30 according to a third embodiment of the present invention. Figure 11 shows an exploded perspective view of the two-axis torque hinge 30. 1 is the first body, 3 is the intermediate body, 2 is the second body, 4 is the first axis, and 5 is the second axis. The configuration of the first body 1, the second body 2, the first axis 4, and the second axis 5 is the same as that of the two-axis torque hinge 10 of the first embodiment, so the same reference numerals are used and their descriptions are omitted.
[0050] In the two-axis torque hinge 30 of the third embodiment, the first friction element 6 and the second friction element 7 are integrally formed. That is, the intermediate body 3 includes a friction plate 31 in which the first friction element 6 and the second friction element 7 are integrated. The friction plate 31 is exposed and not covered by the housing.
[0051] As shown in Figure 12, the first friction element 6 has an arm 6a and is configured such that the tightening torque when the first shaft 4 rotates relative to the first friction element 6 in the tightening direction is greater than the loosening torque when it rotates relative to the first shaft 6 in the loosening direction. The arm 6a is formed by making an arc-shaped notch c in the friction plate 31. The arm 6a has a base portion 6a1 and a tip portion 6a2 and is wrapped around the first shaft 4. The base portion 6a1 of the arm 6a is integrally formed to the right side of the connecting portion 6b. The arm 6a is curved in an arc from the base portion 6a1 to the tip portion 6a2.
[0052] The second friction element 7 has an arm 7a and is configured such that the tightening torque when the second shaft 5 rotates relative to the second friction element 7 in the tightening direction is greater than the loosening torque when it rotates relative to the second shaft 5 in the loosening direction. The arm 7a is also formed by making an arc-shaped notch c in the friction plate 31. The arm 7a has a base 7a1 and a tip 7a2 and is wrapped around the second shaft 5. The base 7a1 of the arm 7a is integrally formed on the left side of the connecting portion 7b. The arm 7a is curved in an arc from the base 7a1 to the tip 7a2. The winding direction of the arm 7a from the base 7a1 to the tip 7a2 is the same as the winding direction of the arm 6a from the base 6a1 to the tip 6a2.
[0053] The two-axis torque hinge 30 of the third embodiment provides the same effects as the two-axis torque hinge 10 of the first embodiment.
[0054] Furthermore, the present invention is not limited to the embodiments described above, and can be modified into various embodiments without altering the essence of the invention.
[0055] In the above embodiment, the first shaft and the second shaft are fixed to the first body and the second body respectively, and the first friction element and the second friction element are fixed to the intermediate body. However, it is also possible to fix the first shaft and the second shaft to the intermediate body and fix the first friction element and the second friction element to the first body and the second body respectively.
[0056] Furthermore, the first shaft can be fixed to the first main body, the first friction element to the intermediate body, the second shaft to the intermediate body, and the second friction element to the second main body. Additionally, the first shaft can be fixed to the intermediate body, the first friction element to the first main body, the second shaft to the second main body, and the second friction element to the intermediate body.
[0057] In the above embodiment, the first friction element and the second friction element each have one arm, but they may also have two arms of different lengths extending in opposite directions from the connecting portion.
[0058] This specification is based on Japanese Patent Application No. 2021-144395, filed on September 6, 2021. All of its contents are included hereby. [Explanation of Symbols]
[0059] 1…First main body 2…Second main body 3…Intermediate 4…1st axis 4a... Friction element engagement part 5…Second axis 5a... Friction element engagement portion 6…First friction element 6a...arm 6a1…Base 6a2…Tip 6b...Connection part 7…Second friction element 7a...arm 7a1…Base 7a2…Tip 7b...Connection part 10...2-axis torque hinge 15… Housing 20...2-axis torque hinge 21… Housing 30...2-axis torque hinge
Claims
1. A two-axis torque hinge comprising a first body, an intermediate body rotatably connected to the first body about a first axis, and a second body rotatably connected to the intermediate body about a second axis, A plurality of stacked first friction elements that engage with the first shaft, The device comprises a plurality of stacked second friction elements that engage with the second axis, The first friction element has an arm wrapped around the first shaft, and is configured such that the tightening torque when the first shaft rotates relative to the first friction element in the tightening direction is greater than the loosening torque when it rotates relative to the first shaft in the loosening direction. The second friction element has an arm wrapped around the second shaft, and is configured such that the tightening torque when the second shaft rotates relative to the second friction element in the tightening direction is greater than the loosening torque when it rotates relative to the second shaft in the loosening direction. When the second body rotates relative to the first body in one direction, a tightening torque acts on one of the first and second shafts, and a loosening torque acts on the other. A two-axis torque hinge in which the first and second axes are not connected by a link so that they can rotate freely relative to each other.
2. The aforementioned two-axis torque hinge is The two-axis torque hinge according to claim 1, characterized in that when the second body rotates in one direction relative to the first body, one of the first and second axes rotates relative to the first axis, and after the relative rotation of the one axis is restricted, the other of the first and second axes rotates relative to the first axis.
3. The two-axis torque hinge according to claim 1 or 2, characterized in that the cross-sections of the friction element engagement portions of the first axis and the second axis are formed to be substantially circular.
4. The first friction element and the second friction element are provided on the intermediate body, The two-axis torque hinge according to claim 1 or 2, characterized in that the winding direction of the arm of the first friction element and the winding direction of the arm of the second friction element are the same.
5. The two-axis torque hinge according to claim 4, characterized in that the first friction element and the second friction element are housed in the housing of the intermediate body.
6. The two-axis torque hinge according to claim 4, characterized in that the first friction element and the second friction element are integrally formed.