JP2006112523A - Hinge mechanism - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a hinge mechanism in which a turning member can be positioned with a stronger force at an arbitrary position in a turning process without using an extra locking mechanism. <P>SOLUTION: A first magnetic pole (N pole), a second pole (S pole) and the first pole (N pole) are circumferentially constituted in this order in the outer circumference of a shaft member 20. Further, the second pole (S pole), the first pole (N pole), and the second pole (S pole) are circumferentially constituted in this order in the inner circumference of the turning member 40. Thus, the turning member 40 is positioned at a predetermined position. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a hinge mechanism such as an opening / closing mechanism or a rotation mechanism between a first casing and a second casing, which is used in a folding cellular phone, a portable personal computer, and the like.

  As a conventional hinge structure, there is provided a magnetic force line generating means for generating a magnetic force line that generates an attractive force or a repulsive force in the radial direction of the shaft of the shaft member between the shaft member and the rotating member, and is based on the magnetic force line generating means The suction force or the repulsive force has a gradient with respect to a relative angle between the shaft member and the rotation member around the axis of the shaft member, and the gradient causes a relative relationship between the shaft member and the rotation member. There is known a hinge structure that generates a large rotational force (see, for example, Patent Document 1).

  In this hinge structure, the rotational force is obtained from the magnetic force, no deterioration occurs, the structure is simple and easy to miniaturize, the rotational force control can be set arbitrarily by the magnetized pattern, and it is locked at a preset position. It is said that there are advantages such as being able to be made.

  Moreover, as a hinge for a conventional portable device, a plate-like member that rotates is provided with a convex portion having a side surface inclined, and a fixed plate-like member that is opposed is provided with a concave portion having a side surface inclined. As a spring that gives a pressing force for friction in a hinge having a click mechanism and a friction function by a simple movement, a hinge in which a spring having a large deflection and a spring having a large load are arranged in series is known (for example, a patent) Reference 2).

  It is described that the use of this hinge requires less space for the hinge, there is no gap at the closed position, and there is an advantage that a separate closing mechanism is not required.

  Further, as a conventional door device, in a furniture in which a door is pivotally attached to a furniture body via a hinge or pin or the like, a first magnet is attached to a fixing portion such as a hinge fixing piece, The movable part such as the movable piece is provided with a second magnet so that the first magnet and the second magnet are in close contact or close to each other in the middle of opening and closing the door. 2. Description of the Related Art A furniture door device is known in which the magnetic poles of the surfaces facing each other are set to the same magnetic pole when they cross each other (see, for example, Patent Document 3).

  In this furniture door device, it is possible to prevent a strong impact from acting on the door when the cabinet door is closed.

  In addition, as a conventional foldable small electronic device, a foldable small electronic device including a case opening / closing operation assisting mechanism configured to be folded into one by hinge-connecting an upper case and a lower case is known. This opening / closing operation assisting mechanism includes an upper case magnet and a lower case magnet arranged in opposite portions of the upper case and the lower case in a folded state, and at least one of these magnets is in relation to the other magnet. It can be moved by an external pressing operation, and it is characterized by having a configuration in which the magnets repel each other during the pressing operation and attract each other when the pressing operation is released. (For example, refer to Patent Document 4).

  In this foldable small electronic device, the closed state of the foldable small electronic device can be released with one button, and the device is opened by the reaction force of the magnet, so that the opening operation can be easily performed with one hand.

  Further, as a conventional foldable small electric device, a foldable electronic device in which a first case body and a second case body are rotatably coupled via a hinge portion is known. The hinge portion of the foldable small-sized electric device includes an arc-shaped first hinge portion integrally formed with the first case body, and a cylindrical second hinge portion integrally formed with the second case body. An arc-shaped third hinge portion for preventing deviation of the columnar second hinge portion fitted to the inner surface of the arc-shaped first hinge portion, and the inner portion of the first and third hinge portions. A magnet is provided on the peripheral wall and a magnet is provided on the outer peripheral wall of the second hinge portion, and the first case body and the second case body are separated at an arbitrary angle by the magnetic force attracted by the magnets facing each other. (See, for example, Patent Document 5).

  In this foldable electronic device, the first case body is fixed at an arbitrary angle with respect to the second case body because the foldable electronic device is configured to be locked to the hinge portion of the foldable electronic device using a magnet. The hinge part is not damaged because there is no need for a support part to hold the position at that time, and the assembly is easier and the number of parts is smaller than the conventional method of fixing using screws and springs. The statement that it is good is made.

In a conventional portable device, a hinge mechanism that controls opening and closing operations using a rotational force generated by a coil spring or a leaf spring and a cam is also known.
JP 2000-179227 A JP 2000-297574 A JP-A-8-151850 Japanese Patent Laid-Open No. 11-234377 Japanese Patent Laid-Open No. 11-252223

  However, although the presence of magnetic poles such as N pole and S pole is shown in the hinge structure described in Patent Document 1, since the yoke structure is not used in this hinge structure, the holding force for positioning the door is weak. I can guess. Moreover, the malfunction that the door cannot be locked in the arbitrary positions in the middle of rotation has arisen.

  Further, in the hinge described in Patent Document 2, since the wave spring is compressed in a portion other than the positioning position, the resistance during rotation is large, and the display device of the notebook computer, the liquid crystal display device of the video camera, There has been a problem that a large force is required to open and close the electric kettle, the lid and door of the electric pot.

  Further, in the furniture door device described in Patent Document 3, it is possible to urge the door in a closing direction or an opening direction by using a force of a magnet, but positioning is performed at an open position or a closed position of the door. Has a problem that it is necessary to provide a separate locking mechanism. Moreover, the malfunction that the door cannot be locked in the arbitrary positions in the middle of rotation has arisen.

  In the foldable small electronic device described in Patent Document 4, it is possible to hold and open the closed state of the small electronic device using the force of the magnet. In order to perform positioning, there is a problem that it is necessary to provide a separate locking mechanism. Moreover, the malfunction that the door cannot be locked in the arbitrary positions in the middle of rotation has arisen.

  Further, in the foldable small electronic device described in Patent Document 5, when the opening operation is performed from the closed position, the opening operation must always be performed against the attractive force of the magnet up to the intermediate position, and the opening / closing operation is wide. There is a problem that the rotational resistance increases in the range. Similarly, when the closing operation is performed from the open position, there is a problem that the closing operation must always be performed against the attractive force of the magnet up to the intermediate position.

  The present invention has been made to solve the above problems, and a first object thereof is a hinge mechanism capable of positioning a rotating member at an arbitrary position with a strong holding force without providing a separate locking mechanism. Is to provide.

  A second object of the present invention is to provide a hinge mechanism capable of strengthening a holding force at a specific positioning position in addition to the first object.

  A third object of the present invention is to provide a hinge mechanism capable of enhancing the holding force at a specific positioning position and facilitating the rotation by reducing the rotational resistance in the range beyond the positioning position. is there.

  In order to achieve the first object, a hinge mechanism according to the present invention includes a shaft member configured in the order of a first magnetic pole, a second magnetic pole, and a first magnetic pole in the circumferential direction of the outer periphery of the shaft, and a shaft member And a rotating member having magnetic poles in the order of the second magnetic pole, the first magnetic pole, and the second magnetic pole in the circumferential direction of the inner periphery of the member into which the magnetic pole portion is inserted.

  In order to achieve the second object, the hinge mechanism of the present invention includes a magnet having a first magnetic pole and a second magnetic pole in the radial direction of the shaft, and both sides of the second magnetic pole from the first magnetic pole. A yoke that passes the lines of magnetic force is housed in the housing portion, the shaft member is configured in the order of the first magnetic pole, the second magnetic pole, and the first magnetic pole in the circumferential direction of the outer periphery of the shaft, and the first in the radial direction of the shaft. The inner circumference of the member in which the magnet having the magnetic pole and the second magnetic pole and the yoke through which the magnetic field lines pass from the second magnetic pole toward both sides of the first magnetic pole are housed in the housing portion and the magnetic pole portion of the shaft member is inserted. And a rotating member having magnetic poles in the order of the second magnetic pole, the first magnetic pole, and the second magnetic pole in the circumferential direction.

  In order to achieve the second object, the hinge mechanism of the present invention is characterized in that a spacer made of a non-magnetic material is provided between the yoke and the magnet.

  In order to achieve the second object, the hinge mechanism of the present invention includes two magnets having a second magnetic pole and a first magnetic pole in the radial direction of the shaft, and the first magnetic pole and the second in the radial direction of the shaft. A shaft member configured to store a first magnet, a second magnetic pole, and a first magnetic pole in the circumferential direction of the outer periphery of the shaft, and a radial direction of the shaft The two magnets having the second magnetic pole and the first magnetic pole and the one magnet having the first magnetic pole and the second magnetic pole in the radial direction of the shaft are housed in the housing portion, and the magnetic pole portion of the shaft member is inserted. And a rotating member having a magnetic pole in the order of the second magnetic pole, the first magnetic pole, and the second magnetic pole in the circumferential direction of the inner periphery of the member.

  In order to achieve the second object, the hinge mechanism of the present invention is provided with a rotation-side magnetic body on one end surface in the axial direction of the rotation member, and at a position facing the one end surface in the axial direction of the rotation member. A shaft-side magnetic body is provided on the existing shaft member side, a magnet is provided on at least one of the rotation-side magnetic body and the shaft-side magnetic body, and based on the attractive force or repulsive force generated by the rotation-side magnetic body and the shaft-side magnetic body. The shaft member-side friction surface and the rotation member-side friction surface for generating a rotational resistance between the shaft member and the rotation member are provided.

  In order to achieve the third object, the hinge mechanism of the present invention is provided with a rotation-side magnetic body on one end surface in the axial direction of the rotation member, and at a position facing the one end surface in the axial direction of the rotation member. A shaft-side magnetic body is provided on the existing shaft member side, a magnet is provided on at least one of the rotation-side magnetic body and the shaft-side magnetic body, and an attractive force or a repulsive force is generated by the rotation-side magnetic body and the shaft-side magnetic body. Based on the shaft member side friction surface and the rotation member side friction surface that cause rotation resistance between the shaft member and the rotation member, and the rotation member and the shaft member are moved relatively in the axial direction, the shaft member An isolation mechanism for isolating the side friction surface and the member side friction surface is provided.

  According to the present invention, the shaft member that forms the magnetic poles in the order of the first magnetic pole, the second magnetic pole, and the first magnetic pole in the circumferential direction of the outer periphery of the shaft, and the inner periphery of the member that inserts the magnetic pole portion of the shaft member In the circumferential direction, the second magnetic pole, the first magnetic pole, and the rotating member that constitutes the magnetic pole in this order are provided. The rotating member can be positioned at an arbitrary position and a specific position. In addition, it is possible to reduce the resistance force for rotation other than the positioning position.

  According to the invention, a magnet having a first magnetic pole and a second magnetic pole in the radial direction of the shaft and a yoke for passing a magnetic field line from the first magnetic pole toward both sides of the second magnetic pole are provided in the storage section. A shaft member that is housed to form a magnetic pole in the order of the first magnetic pole, the second magnetic pole, and the first magnetic pole in the circumferential direction of the outer periphery of the shaft, and has the first magnetic pole and the second magnetic pole in the radial direction of the shaft. A magnet and a yoke that passes lines of magnetic force from the second magnetic pole toward both sides of the first magnetic pole are accommodated in the accommodating portion, and the second in the circumferential direction of the inner periphery of the member that inserts the magnetic pole portion of the shaft member. Since there is a rotating member comprising the magnetic pole, the first magnetic pole, and the second magnetic pole in this order, any position and specific position during the rotation with a stronger force without using a separate locking mechanism With this, it becomes possible to position the rotating member. In addition, it is possible to reduce the resistance force for rotation other than the positioning position. Further, by using the yoke, it is possible to concentrate the magnetic lines of force on the local portion of the gap between the shaft member and the rotating member, so that the holding force at a specific positioning position can be increased.

  Further, according to the present invention, since the spacer is installed between the yoke and the magnet, it is possible to generate more magnetic lines of force through the gap between the shaft member and the rotating member, and the holding force at a specific positioning position is strengthened. It becomes possible.

  Further, according to the present invention, the storage unit includes two magnets having the second magnetic pole and the first magnetic pole in the radial direction of the shaft and one magnet having the first magnetic pole and the second magnetic pole in the radial direction of the shaft. And a shaft member comprising magnetic poles in the order of the first magnetic pole, the second magnetic pole, and the first magnetic pole in the circumferential direction of the outer periphery of the shaft, and the second magnetic pole and the first magnetic pole in the radial direction of the shaft. Two magnets having the first magnetic pole and one magnet having the second magnetic pole in the radial direction of the shaft are housed in the housing portion and the magnetic pole portion of the shaft member is inserted in the circumferential direction of the inner periphery of the member. Since there is a rotating member that constitutes the magnetic poles in the order of the second magnetic pole, the first magnetic pole, and the second magnetic pole, it is possible to specify an arbitrary position during the rotation with a stronger force without using a separate locking mechanism. It becomes possible to position the rotating member at the position. In addition, it is possible to reduce the resistance force for rotation other than the positioning position.

  Further, according to the hinge mechanism of the present invention, the rotation-side magnetic body is provided on one end surface in the axial direction of the rotation member, and the shaft side is located on the shaft member side located at the position facing the one end surface in the axial direction of the rotation member. A magnetic body is provided, a magnet is provided on at least one of the rotating side magnetic body and the shaft side magnetic body, and the shaft member and the rotating member are based on the attractive force or repulsive force by the rotating side magnetic body and the shaft side magnetic body. Since the shaft member side friction surface and the rotation member side friction surface that generate the rotation resistance are provided, the holding force at the positioning position can be strengthened.

  Further, according to the hinge mechanism of the present invention, the rotation-side magnetic body is provided on one end surface in the axial direction of the rotation member, and the shaft side is located on the shaft member side located at the position facing the one end surface in the axial direction of the rotation member. A magnetic body is provided, a magnet is provided on at least one of the rotation-side magnetic body and the shaft-side magnetic body, and the shaft member and the rotation member based on the attractive force or repulsive force between the rotation-side magnetic body and the shaft-side magnetic body. A shaft member side friction surface and a rotation member side friction surface that cause rotation resistance between the shaft member side friction surface and the shaft member side friction surface and the member side friction surface by relatively moving the rotation member and the shaft member in the axial direction. Therefore, it is possible to reduce the rotational resistance in the range beyond the positioning position to facilitate rotation while strengthening the holding force at the specific positioning position.

  In addition, according to the present invention, since the rotational force is based on magnetic force, it is possible to reduce deterioration, and it is possible to reduce the size by a simple structure. In addition, the rotational force rotates only at a specific relative angle between the shaft member and the rotating member. Force can be generated. Moreover, it becomes possible to arbitrarily give or delete the rotational sliding resistance, and it becomes possible to improve the operability of the folded portable device.

  The best mode for carrying out the present invention will be described below with reference to the drawings.

  FIG. 1 is an exploded perspective view of a hinge mechanism according to the present invention.

  As shown in the figure, the hinge mechanism 10 according to the present invention includes a shaft member 20 that serves as a fixed shaft of the hinge mechanism 10, a pivot member 40 that serves as a pivot shaft of the hinge mechanism 10, and the pivot member 40. Are provided with bushes 50 and 52 that support the shaft member 20 in the thrust direction and the radial direction. In the example shown in the figure, since the bushes 50 and 52 are configured to be press-fitted into the inner surface of the rotating member 40, the bushes 50 and 52 rotate together with the rotating member 40.

  In the example shown in the figure, magnets 22 and 23 having a first magnetic pole (for example, N pole) and a second magnetic pole (for example, S pole) in the radial direction of the shaft of the shaft member 20, and the first magnetic pole Yokes 24 and 25 made of a magnetic material for passing lines of magnetic force toward both sides of the second magnetic pole, and spacers 26 and 27 made of a non-magnetic material installed between the yokes 24 and 25 and the magnets 22 and 23. Are provided in two places. By arranging the magnets 22 and 23 in this way, the first magnetic pole (for example, N pole), the second magnetic pole (for example, S pole), and the first magnetic pole (for example, N pole) in the circumferential direction of the shaft outer periphery of the shaft member 20 are arranged. The magnetic poles are configured in the order of (N pole).

  Further, the shaft member 20 is provided with a ring groove 30 in which a C ring 70 for preventing the bush 50, the rotating member 40, the magnetic plate 60, the bush 52, and the sliding member 62 from falling off is provided.

  In addition, a chamfer 32 (upper and lower surfaces in the example shown in the figure) is provided at the tip of the shaft member 20 to restrict the rotation of the sliding member 62. A rotation restricting surface 64 for fitting with the chamfer 32 is provided. In the example shown in the figure, the sliding member 62 is composed of a magnet, and if necessary, the magnetic plate 60 is attracted so that the rotating member side friction surface of the bush 52 and the shaft member side friction surface of the sliding member 62 are It is possible to generate a frictional force between them and to generate a rotation resistance in the rotation member 40.

  Further, on the inner surface of the rotating member 40, magnets 42 and 43 having a first magnetic pole (for example, N pole) and a second magnetic pole (for example, S pole) in the radial direction of the shaft, and the second magnetic pole from the second magnetic pole. A housing for housing yokes 44 and 45 for passing lines of magnetic force toward both sides of the first magnetic pole, and spacers 46 and 47 made of a non-magnetic material provided between the yokes 44 and 45 and the magnets 42 and 43. Two parts 48 are provided. By arranging the magnets 42 and 43 in this way, the second magnetic pole (for example, S pole) and the first magnetic pole (for example, S) in the circumferential direction of the inner periphery of the rotating member 40 into which the magnetic pole portion of the shaft member 20 is inserted. N poles) and second magnetic poles (for example, S poles) are arranged in this order.

  The spacers 26, 27, 46, and 47 are members for giving more lines of magnetic force to the gap between the shaft member 20 and the rotation member 40, and the thickness of each space is appropriately determined in relation to the gap. If there is no need to widen the gap, the spacers 26, 27, 46, 47 may be omitted.

  In the example shown in the figure, the magnet 22, the magnet 23, and the magnets 42 and 43 are arranged at intervals of 180 degrees in order to position the rotating member 40 every 180 degrees, but the present invention is limited to every 180 degrees. The magnet 22, the magnet 23, and the illustrated magnets 42 and 43 may be arranged at intervals of 120 degrees or the like.

  In addition, instead of using the yokes 24, 25 or 44, 45 through which the magnetic lines of force pass, two magnets having the second magnetic pole and the first magnetic pole in the radial direction of the shaft may be used. It is possible to achieve.

  FIG. 2 is a cross-sectional view when the shaft member and the rotating member are present at the first positioning position.

  As shown in the drawing, since the shaft member 20 is provided with the magnets 22 and 23 and the yokes 24 and 25, the circumferential magnetic poles of the outer periphery of the shaft member 20 are N poles (for example, the first magnetic pole), S The poles (for example, the second magnetic pole) and the N poles (for example, the first magnetic pole) are arranged in this order.

  Since the other rotating member 40 is provided with the magnets 42 and 43 and the yokes 44 and 45, the inner peripheral magnetic pole of the rotating member 40 is the S pole (for example, the second magnetic pole) and the N pole (for example, the first pole). 1 magnetic pole) and S pole (for example, second magnetic pole).

  Therefore, in the state shown in the figure, the magnetic force provided between the outer periphery of the shaft member 20 and the inner periphery of the rotating member 40 generates a pulling force, so that the attraction force is maximized and is determined as the first positioning position. Become. If the rotating member 40 is rotated rightward or leftward from the state shown in the figure, the S pole (second magnetic pole) provided on the outer periphery of the shaft member 20 and the rotating member 40 Since the S pole (second magnetic pole) provided on the circumference approaches, a force is generated in the direction in which the magnetic poles repel each other, and the S pole (second magnetic pole) provided on the outer circumference of the shaft member 20 rotates. Since a force attracted by the N pole (first magnetic pole) provided on the inner periphery of the member 40 is generated, it is possible to return to the first positioning position with a stronger force.

  According to the present invention, the yokes 24, 25, 44, 45 that efficiently pass the magnetic lines of force of the magnets 22, 23, 42, 43 are provided, so that leakage of the lines of magnetic force is suppressed, and the outer periphery of the shaft member 20 or the rotating member 40. Since the magnetic lines of force can be concentrated on the outer periphery of the slab (the range in which the lines of magnetic force are generated can be limited), it is possible to easily identify the positioning position of the shaft member 20 and the rotating member 40 at a specific relative angle. It becomes.

  FIG. 3 is a cross-sectional view when the shaft member and the rotating member are not present at the positioning position.

  In the state shown in the figure, the N pole (first magnetic pole) provided on the outer periphery of the shaft member 20 and the S pole (second magnetic pole) provided on the inner periphery of the rotating member 40 generate a pulling force. The rotational force toward the first positioning position is generated.

  Then, when the rotating member 40 is further rotated to the right from the state shown in the figure, the N pole (first magnetic pole) and the S pole (second magnetic pole) provided on the outer periphery of the shaft member 20, the rotation Since the S pole (second magnetic pole) and the N pole (first magnetic pole) provided on the inner periphery of the moving member 40 generate repulsive forces, the rotational force toward the first positioning position decreases. When the rotating member 40 is further rotated rightward, a strong rotational force is generated toward the first positioning position as described above, and the rotating member 40 is positioned at a specific relative angle.

  FIG. 4 shows the rotational force expressed as positive, the rotational force for rotating the rotational member counterclockwise at the relative rotational position (first positioning position) between the shaft member and the rotational member shown in FIG. FIG.

  As shown in the figure, according to the present invention, it is possible to generate a rotational force for positioning toward the first positioning position (Θ = 0 °) and the second positioning position (Θ = 180 °). It becomes.

  As described above, the rotational force toward the first positioning position decreases at the position A shown in FIG. Depending on the size of the gap between the shaft member 20 and the rotating member 40, the strength of the magnetic force of the magnets 22, 23, 42, 43, and the shape of the yokes 24, 25, 44, 45, as shown in FIG. It is also possible to design so that the rotational force toward the positioning position 1 takes a negative value.

  FIG. 5 is a front view for explaining the rotational resistance generating portion of the hinge mechanism according to the present invention.

  In the state shown in the figure, the magnetic plate 60 (rotation side magnetic body) and the bush 52 are fixed to one end surface of the rotation member 40 in the axial direction, and rotate together. Further, a sliding member 62 (shaft side magnetic body) is fixed to the shaft member 20 side that exists at a position facing the one end surface of the rotating member 40 in the axial direction.

  In the state shown in the figure, the rotating member side friction surface of the bush 52 fixed to the rotating member 40 is in contact with the shaft member side friction surface of the sliding member 62. And since the sliding member 62 is comprised with the magnet, the attraction force by a magnetic force is generate | occur | produced between the sliding member 62 and the magnetic board 60 which has magnetism. Therefore, the sliding resistance and the rotational resistance of the rotating member 40 are calculated from a value obtained by multiplying the suction force and the friction coefficient between the rotating member side friction surface of the bush 52 and the shaft member side friction surface of the sliding member 62. It is possible to determine the power. In the example shown in FIG. 5, the sliding member 62 (shaft side magnetic body) is composed of a magnet. However, the sliding member 62 (shaft side magnetic body) or the magnetic plate 60 (rotation side magnetic body) is shown. The object of the present invention can be achieved even if at least one of the above is a magnet. In the example shown in FIG. 5, the example in which the sliding resistance is generated by using the attractive force generated between the magnet of the sliding member 62 and the magnetic plate 60 has been described. It is good also as a structure which comprises a magnet of the same polarity and generate | occur | produces sliding resistance using the repulsive force.

  FIG. 6 is a diagram showing the value of the rotational resistance generated from the rotational resistance generating part of the hinge mechanism according to the present invention.

  As shown in the figure, if the surface roughness of the contact surface is uniform, the rotational resistance due to the contact between the rotating member side friction surface of the bush 52 and the shaft member side friction surface of the sliding member 62 is the rotation angle (Θ). In addition, the resistance value is almost uniform regardless of the direction of rotation. When the rotational direction is the positive direction, rotational resistance is generated in the reverse negative direction, and when the rotational direction is the negative direction, rotational resistance is generated in the reverse positive direction.

  FIG. 7 is a diagram illustrating a resultant force of the rotational force in a state where the sliding member and the bush are attracted and adhered by magnetic force.

  In the example shown in the figure, the sliding member 62 and the magnetic plate 60 are attracted to each other, and the shaft member side friction surface of the sliding member 62 and the rotating member side friction surface of the bush 52 are in close contact with each other and slide. This shows a state where resistance is generated. The graph of the force (rotational force resultant force) necessary for relatively rotating the shaft member 20 and the rotation member 40 in one direction in this state is shown in FIG.

  As shown in the figure, the resultant rotational force is a value obtained by adding a force opposed to the rotational force and the rotational resistance.

  FIG. 8 is a diagram illustrating the rotational force in a state where the sliding member and the bush are attracted and adhered by magnetic force.

  As shown in the figure, the rotational force (restoring force) is the rotational force (restoring force) in a state where the shaft member side friction surface of the sliding member 62 and the rotating member side friction surface of the bush 52 are not attracted by magnetic force. ) Is the value obtained by subtracting the rotational resistance.

  FIG. 9 is a diagram illustrating a resultant force of the rotational force in a state where a gap exists between the sliding member and the bush.

  When an isolation mechanism in which the rotating member 40 is shortened so that the relative position between the shaft member 20 and the rotating portion 40 can be moved in the axial direction, the sliding member 62 and the rotating member are used. By pushing the shaft member 20 in a direction to separate it from 40, the shaft member side friction surface of the sliding member 62 and the rotating member side friction surface of the bush 52 can be isolated and a gap can be provided. Then, the frictional force based on the close contact between the sliding member 62 and the bush 52 can be eliminated, and the sliding resistance is eliminated.

  At this time, the amount of change in the relative position between the shaft member 20 and the rotating member 40 is sufficient to be a slight displacement that creates a gap. When the pushing force of the shaft member 20 is released, the relative position between the shaft member 20 and the rotating member 40 returns to FIG.

  As shown in the figure, the resultant rotational force in a state in which a gap exists between the sliding member 62 and the bush 52 is a force that opposes the rotational force shown in FIG.

  Therefore, when the shaft member 20 and the rotation member 40 are in the first positioning position, the sliding member 62 and the bush 52 are brought into close contact with each other to generate sliding resistance, thereby holding the first positioning position. Strength can be strengthened.

  Further, when the shaft member 20 and the rotating member 40 are moved from the first positioning position, the sliding member 62 and the bushing are pushed by pushing the shaft member 20 in a direction to separate the sliding member 62 and the rotating member 40. By providing a gap between the first and second members 52, it is possible to eliminate the rotational resistance caused by the frictional force and facilitate the rotation.

  When the shaft member 20 and the rotating member 40 are in the first positioning position, the sliding member 62 and the bush 52 are in close contact with each other, and the shaft member 20 and the rotating member 40 are slightly moved from the first positioning position. By providing a displacement mechanism such as a cam that displaces the sliding member 62 and the rotating member 40 in a direction that separates the sliding member 62 and the rotating member 40 when the angle is moved, the holding force when in the first positioning position is strengthened, and the resistance to rotation during rotation is increased. It is also possible to make it easier to rotate by reducing.

  ADVANTAGE OF THE INVENTION According to this invention, it becomes possible to provide a foldable portable telephone apparatus, a portable terminal, etc. provided with the small hinge mechanism excellent in the operation feeling which can position an opening-and-closing part in arbitrary positions.

It is a disassembled perspective view of the hinge mechanism which concerns on this invention. It is sectional drawing in case a shaft member and a rotation member exist in a 1st positioning position. It is sectional drawing when a shaft member and a rotation member do not exist in a positioning position. FIG. 6 is a characteristic diagram of rotational force in which the rotational force that rotates the rotating member counterclockwise with the first positioning position as a boundary is represented as positive. It is a front view explaining the rotational resistance generation | occurrence | production part of the hinge mechanism which concerns on this invention. It is a figure which shows the value of the rotational resistance which generate | occur | produces from the rotational resistance generation | occurrence | production part of the hinge mechanism based on this invention. It is a figure which shows the rotational force resultant force in the state which the sliding member and the bush attracted | suck contact | adhered by magnetic force. It is a figure which shows the rotational force in the state in which the sliding member and the bush attracted | suck contact | adhered by magnetic force. It is a figure which shows the rotational force resultant force in the state in which the gap exists between a sliding member and a bush.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Hinge mechanism 12 Rotational resistance generating part 20 Shaft member 22, 23 Magnet 24, 25 Yoke 26, 27 Spacer 28 Storage part 30 Ring groove 32 Chamfering 40 Rotating member 42, 43 Magnet 44, 45 Yoke 46, 47 Spacer 48 Storage Part 50, 52 Bush 60 Magnetic plate 62 Sliding member 64 Rotation limiting surface 70 C ring

Claims (7)

A shaft member comprising magnetic poles in the order of the first magnetic pole, the second magnetic pole, and the first magnetic pole in the circumferential direction of the outer periphery of the shaft;
A rotating member configured with magnetic poles in the order of the second magnetic pole, the first magnetic pole, and the second magnetic pole in the circumferential direction of the inner circumference of the member for inserting the magnetic pole portion of the shaft member;
A hinge mechanism characterized by comprising: A magnet having a first magnetic pole and a second magnetic pole in the radial direction of the shaft, and a yoke passing a magnetic field line from the first magnetic pole toward both sides of the second magnetic pole are housed in the housing portion, A shaft member comprising magnetic poles in the order of the first magnetic pole, the second magnetic pole, and the first magnetic pole in the circumferential direction of
A magnet having a first magnetic pole and a second magnetic pole in the radial direction of the shaft, and a yoke passing a magnetic field line from the second magnetic pole toward both sides of the first magnetic pole are housed in the housing portion, and the shaft A rotating member configured with magnetic poles in the order of the second magnetic pole, the first magnetic pole, and the second magnetic pole in the circumferential direction of the inner circumference of the member for inserting the magnetic pole portion of the member;
A hinge mechanism characterized by comprising: A magnet having a first magnetic pole and a second magnetic pole in the radial direction of the shaft, a yoke passing a magnetic field line from the first magnetic pole toward both sides of the second magnetic pole, and installed between the yoke and the magnet A non-magnetic spacer that is housed in the housing portion, and a shaft member configured with magnetic poles in the order of the first magnetic pole, the second magnetic pole, and the first magnetic pole in the circumferential direction of the outer periphery of the shaft;
A magnet having a first magnetic pole and a second magnetic pole in the radial direction of the shaft, a yoke that passes lines of magnetic force from the second magnetic pole toward both sides of the first magnetic pole, and a space between the yoke and the magnet A spacer made of a non-magnetic material is housed in the housing portion, and the second magnetic pole, the first magnetic pole, and the second magnetic pole are arranged in the order of the second magnetic pole, the first magnetic pole, and the second magnetic pole in the circumferential direction of the inner periphery of the member into which the magnetic pole portion of the shaft member is inserted. A rotating member comprising:
A hinge mechanism characterized by comprising: Two magnets having the second magnetic pole and the first magnetic pole in the radial direction of the shaft and one magnet having the first magnetic pole and the second magnetic pole in the radial direction of the shaft are housed in the housing portion, and the shaft A shaft member comprising magnetic poles in the order of the first magnetic pole, the second magnetic pole, and the first magnetic pole in the circumferential direction of the outer periphery;
Storing two magnets having the second magnetic pole and the first magnetic pole in the radial direction of the axis and one magnet having the first magnetic pole and the second magnetic pole in the radial direction of the axis in the storage unit; A rotating member configured with magnetic poles in the order of the second magnetic pole, the first magnetic pole, and the second magnetic pole in the circumferential direction of the inner circumference of the member into which the magnetic pole portion of the shaft member is inserted;
A hinge mechanism characterized by comprising: Two magnets having a second magnetic pole and a first magnetic pole in the radial direction of the axis, a single magnet having the first magnetic pole and the second magnetic pole in the radial direction of the axis, and the three magnets are installed. A shaft member configured to store a spacer made of a non-magnetic material in a storage portion, and configure the magnetic poles in the order of the first magnetic pole, the second magnetic pole, and the first magnetic pole in the circumferential direction of the outer periphery of the shaft;
Two magnets having a second magnetic pole and a first magnetic pole in the radial direction of the axis, a single magnet having the first magnetic pole and the second magnetic pole in the radial direction of the axis, and the three magnets are installed. A spacer made of a non-magnetic material is housed in the housing portion, and the magnetic poles are arranged in the order of the second magnetic pole, the first magnetic pole, and the second magnetic pole in the circumferential direction of the inner periphery of the member into which the magnetic pole portion of the shaft member is inserted. A configured rotating member;
A hinge mechanism characterized by comprising: The hinge mechanism according to any one of claims 1 to 5,
A rotation-side magnetic body is provided on one end surface in the axial direction of the rotation member,
Providing a shaft-side magnetic body on the shaft member side present at a position facing one end surface of the rotating member in the axial direction;
A magnet is provided on at least one of the rotating side magnetic body or the shaft side magnetic body,
A shaft member-side friction surface and a rotation member that generate a rotation resistance between the shaft member and the rotation member based on an attractive force or a repulsive force by the rotation-side magnetic body and the shaft-side magnetic body. A hinge mechanism comprising a side friction surface. The hinge mechanism according to any one of claims 1 to 5,
A rotation-side magnetic body is provided on one end surface in the axial direction of the rotation member,
Providing a shaft-side magnetic body on the shaft member side present at a position facing one end surface of the rotating member in the axial direction;
A magnet is provided on at least one of the rotating side magnetic body or the shaft side magnetic body,
A shaft member-side friction surface and a rotation member that generate a rotation resistance between the shaft member and the rotation member based on an attractive force or a repulsive force by the rotation-side magnetic body and the shaft-side magnetic body. Side friction surface,
An isolation mechanism that relatively moves the rotating member and the shaft member in the axial direction to isolate the shaft member side friction surface and the rotation member side friction surface;
A hinge mechanism characterized by comprising:

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