JP4471991B2 - Rotating connecting device and electronic device using the rotating connecting device - Google Patents

Description

  The present invention relates to a rotary connecting device that rotatably connects a second member superposed on a first member along a superposed surface, and a mobile phone, a mobile digital camera, a notebook computer using the rotary connecting device, etc. It relates to electronic equipment.

  When the second member overlapped with the first member is rotated along the overlapping surface, a return rotation biasing force is generated from the rotation start position to the midway rotation position, thereby maintaining the position holding action at the rotation start position. If it is generated and rotated until it exceeds the position in the middle of the rotation, a reverse biasing force is generated, for example, to the 90 ° rotational position, so that it can be rotated with a light force or the rotational biasing force is increased. Thus, there has been proposed a rotation coupling device that automatically rotates to, for example, a 90-degree rotation position by this rotation biasing force once it is rotated to a position exceeding the rotation intermediate position.

  For example, in a mobile phone that uses a display unit as a one-segment TV screen, it has been proposed as a rotation connecting device that can freely switch the display unit from a vertically long state to a horizontally long state rotated 90 degrees.

  Specifically, for example, a superimposing unit provided with a display unit is connected to a main body unit provided with an operation unit of a mobile phone by a hinge device so as to be able to swing up and down. The superposition part is composed of a base part that is pivotably connected and a superposition part that is pivotally connected to the base part by 90 degrees, and a display part is provided in the superposition part of the superposition part. The polymerization rotation part and the base part are connected by the rotation connecting device, and the polymerization rotation part provided with the display part is set to the base part in an open state in which the main body part is overlapped or undulated. It is provided so that it can be freely rotated, and when it is used as a one-segment TV screen, it is rotated 90 degrees so that it can be used as a landscape display.

  As described above, in the rotation coupling device proposed in the past, the biasing direction is automatically switched at the middle position of rotation, and a sufficient return bias is generated. Thus, the rotation operation becomes lighter and automatic rotation becomes possible, and the 90-degree rotation position is held by this biasing, which is very convenient.

  However, for this reason, a spring for generating this bias must be provided, and it is necessary to provide a guide portion for guiding this rotation while generating the bias by this spring. The structure becomes complicated, and therefore it cannot be rotated in both forward and reverse directions, and is limited to 90-degree reciprocal rotation in only one direction on one side.

  In the present invention, the direction in which the rotation can be performed is not limited to one direction on one side, but can be in either the left or right direction, that is, the forward or reverse rotation direction. If it exceeds the midway rotation position, it automatically switches from the return rotation bias to the advance rotation bias, and as before, the position holding action at the rotation start position and the position holding action at the 90-degree rotation position or halfway After that, the rotation can be lightened or automatically rotated, and at the beginning of rotation, even if the rotating member is square, the corner does not get in the way and the center is the fulcrum It can be rotated horizontally, so it can be easily realized with a simple structure, but it can be rotated to produce the above-mentioned effects and effects as before, and it can be rotated forward or backward with a simple structure. However, it produces this action and effect and is very easy to use. For example, even when the display unit is switched from the vertically long state to the horizontally long state, the rotation start position is automatically held regardless of the direction of rotation. However, even if it is slightly rotated and exceeds the midway position, it can be switched lightly or automatically, and even in the case of a square shape, an electronic device that can be switched smoothly with the center as a fulcrum can be easily realized. It is an object of the present invention to provide a periodical rotation coupling device and an electronic apparatus using the rotation coupling device.

  The gist of the present invention will be described with reference to the accompanying drawings.

A rotation coupling device that couples the first member 1 and the second member 2 in a superposed state so as to be pivotable along the superposition surface, and includes a coupling pin 3 serving as a pivotal fulcrum, A first attachment that attaches either the first member 1 or the first member 1 to either the slide guide portion 4 that is slidably engaged in the diametrical direction relative to the rotational direction and has a length in the sliding direction. provided part 1A, and the other a set only by the second member 2 or the second mounting portion 2A attached to the second member 2, the second member 2 along the polymer surface with respect to the first member 1 camming edge 6 Te in the relatively rotatably configured so as to be freely relatively slide in the diameter direction, cams abutting portion 5 Toko of cam contact portion 5 is copying moves in contact during relative rotation And either the first member 1 or the first attachment Provided 1A, either only set the other to the second member 2 or the second mounting portion 2A, the biasing portion 7 for urging so that said cam abutting portion 5 is pressed against the cam edge 6 provided When the second member 2 rotates along the overlapping surface with respect to the first member 1, the cam contact portion 5 is pressed against the cam edge 6 by the biasing portion 7, and this cam In response to a change in the distance between the edge 6 and the connecting pin 3, the slide guide portion 4 is slid relative to the connecting pin 3, and the second member 2 is moved to the cam relative to the first member 1. According to the shape of the edge 6, the cam edge 6 is configured to rotate relative to the diametrical sliding direction while automatically sliding relative to each other. The shape of the cam edge 6 includes the position where the connecting pin 3 is provided, and the first A rotation start position at which the second member 2 starts to rotate relative to the member 1; The center is a shape that continues from the left and right of the rotation start position to the position of the connecting pin 3, and the cam contact portion 5 moves along with the right and left of the rotation start position. As for the shape, when turning 90 degrees forward and backward from this turning start position, the distance to the connecting pin 3 gradually increases to the turning middle position, and when the turning middle position is exceeded, the distance gradually increases. It is set to a smaller shape and can be rotated in either the forward or reverse direction, and until the middle position of rotation, the rotation start position is determined by the shape of the cam edge 6 and the pressing force of the urging portion 7. A rotation coupling device characterized in that a rotation urging force is generated to generate a return rotation urging force to return to a reverse position and to move toward the 90 ° rotation position. It is related to.

In addition, the first attachment portion 1A attached to the first member 1 is provided with the slide guide portion 4 having a length in the sliding direction in the diameter direction, and the second attachment portion 2A attached to the second member 2 is provided. The connecting pin 3 is provided as the rotation fulcrum with which the slide guide portion 4 is slidably engaged, and the cam abutment is provided at the longitudinal position of the first mounting portion 1A where the slide guide portion 4 is provided. Provided with a cam edge 6 on which the cam contact portion 5 moves along the second mounting portion 2A, the first mounting portion 1A provided with the slide guide portion 4, and the connecting pin 3 2. The rotating portion according to claim 1, wherein the biasing portion for biasing the cam abutting portion so as to press and abut against the cam edge is provided between the second mounting portion and the second mounting portion. This relates to a dynamic coupling device.

Further, the connecting pin 3 serving as a rotation fulcrum is protruded from the plate-like second attaching portion 2A attached to the second member 2, and is slidably engaged with the connecting pin 3 so as to slide in the diameter direction . The long window-like slide guide portion 4 having a length in the direction is provided in the plate-like first attachment portion 1A attached to the first member 1, and the length of the slide guide portion 4 of the first attachment portion 1A is provided. A pin-shaped cam contact portion 5 is provided in a projecting position, and a cam groove 9 having an inner edge as the cam edge 6 is provided in the second mounting portion 2A. 3. A pin 3 is provided with a spring mounting portion 10 so as to be rotatable, and an anti-extension spring is connected to the spring mounting portion 10 and the first mounting portion 1A as the biasing portion 7. The present invention relates to a rotary connecting device.

  The shape of the cam edge 6 is centered on the position where the connecting pin 3 is provided and the reference position 6A where the cam contact portion 5 is located at the rotation start position. Each of the reference positions 6A has a left-right symmetrical shape that smoothly curves in a mountain shape and continues to the position of the connecting pin 3, and the cam contact portion 5 is in the center at the reference position during the forward / reverse rotation from the rotation start position. When moving from 6A to the left and right, the shape of the distance between the connecting pin 3 and the reference pin 6A is gradually increased from the reference position 6A to both the forward and reverse rotations. The urging unit 7 is configured so that a return urging urging force is generated and a position holding action is generated when the urging unit 7 is at the reference position 6A. As this shape becomes shorter, 4. A position holding action is formed at a position where a rotation urging force is generated by the urging unit 7 beyond a halfway position and both the forward and reverse rotations are rotated 90 degrees. It concerns on the rotation coupling device of any one of these.

  Further, a base portion and a superposition rotation portion that is superposed on the base portion and provided so as to be rotatable along the superposition surface are connected by a rotation connecting device, and the rotation connecting device connects the base portion to the first portion. It was set as the rotation connection apparatus of any one of the said Claims 1-4 which made it the 1st member 1 or the 2nd member 2, and used the said superposition | polymerization rotation part as the said 2nd member 2 or the 1st member 1. The present invention relates to an electronic apparatus using the featured rotating connecting device.

  In addition, an overlapping portion provided with a display portion is provided on the main body portion provided with the operation portion so as to be able to swing up and down, and the overlapping portion provided with the display portion is provided on the base portion provided on the main body portion so as to be freely turned up and down. And a superposition rotation part that is superposed on the base part and is provided so as to be rotatable along the superposition surface. The superposition part is provided with the display part, and the superposition of the base part and the display part is provided. The moving parts are connected by a rotary connecting device. In this rotary connecting device, the base part is the first member 1 or the second member 2, and the superposition rotating part is the second member 2 or the first member 1. The electronic device using the rotational coupling device according to claim 5, wherein the rotational coupling device according to any one of claims 1 to 4 is used.

  In addition, the overlapping rotation unit provided with the display unit is configured to be capable of switching 90 degrees forward and reverse in the direction of the overlapping surface, and is rotated 90 degrees forward or backward from the vertically long display state to the horizontally long display state. 7. The electronic apparatus using the rotation coupling device according to claim 5, wherein the rotation coupling device is configured to be freely switchable.

  Since the present invention is configured as described above, the direction in which the rotation can be performed is not limited to one direction on one side, but can be performed in either the left or right direction, that is, in either the forward or reverse rotation direction. Even when moving, if the position in the middle of the rotation is exceeded, it automatically switches from the return rotation bias to the advance rotation bias, and as before, the position holding action at the rotation start position and the 90-degree rotation position If the position is maintained, or if it is rotated halfway, then the rotation can be lightened or automatically rotated. At the beginning, even if the rotating member is rectangular, the corners are obstructive. It is possible to rotate in a horizontally long state with the center as a fulcrum, and therefore, it is possible to realize the rotation that produces the above-mentioned action and effect while being a simple configuration, and a simple configuration. This action / effect occurs even if it is rotated forward or reverse, Liable correspondingly intended use Use the spread utility in Xiu the revolutionary rotating coupling device.

  Further, in the inventions according to claims 2, 3 and 4, it becomes a further excellent rotation connecting device which can easily realize the present invention with a simpler configuration.

  According to the fifth, sixth, and seventh aspects of the invention, the electronic device exerts the above-mentioned action and effect. In the sixth and seventh aspects of the invention, the display unit is rotated 90 degrees in any direction. It is possible to switch from the vertically long display state to the horizontally long display state by freely switching the movement, and at the rotation start position, the position is biased and held in any direction until the middle of the rotation. If it moves, it will turn lightly or automatically turn 90 degrees, and even in a square shape, it can be smoothly switched from the center to the fulcrum, and it is extremely useful in both directions This is an epoch-making electronic device having a display unit that can be freely switched by 90 degrees.

  Embodiments of the present invention that are considered suitable (how to carry out the invention) will be briefly described with reference to the drawings, illustrating the operation of the present invention.

When the second member 2 is rotated along the overlapping surface with respect to the first member 1, the second member 2 is rotated with the connecting pin 3 as a fulcrum. At this time, the slide guide portion 4 is moved with respect to the connecting pin 3. By relative sliding, the second member rotates while sliding for a predetermined length in the diameter direction with respect to this rotation direction .

On the other hand, the cam contact portion 5 rotates and moves along the cam edge 6 while being pressed against the cam edge 6 by the urging force of the urging portion 7, but the distance between the cam edge 6 and the connecting pin 3 is as follows. Since the cam edge 6 is set in a shape that gradually changes in the rotation direction, when the second member 2 is rotated with respect to the first member 1, the cam edge 6 corresponds to the shape of the cam edge 6 (in the rotation position). Accordingly, the second member 2 rotates while sliding and returning in the sliding direction , which is the diameter direction.

That is, for example, the first mounting portion 1A attached to the first member 1 is provided with the connecting pin 3 and the cam groove 9 having the cam edge 6 as an inner edge, and the second mounting portion 2A attached to the second member 2 has a connecting pin. The first member 1 and the first member 1 are provided with a slide guide portion 4 that engages with the cam 3 and a cam contact portion 5 that presses and abuts with the biasing portion 7 and engages with the cam groove 9 that moves along the cam edge 6. When the two members 2 are pivotably connected, the cam abutment portion 5 moves along with this cam edge 6 (cam groove 9) formed in either the left or right direction with respect to the rotation start position. It can be rotated in either direction. Then, for example, when the rotation is performed in one direction on one side, the distance between the connection pin 3 and the cam contact portion 5 gradually increases, so that the slide guide portion 4 against the connection pin 3 against the urging force of the urging portion 7. Rotates while sliding (the second member 2 slides in the sliding direction which is the diameter direction with respect to the first member 1).

For this reason, a return urging force is generated at the beginning of rotation, and a position holding action at the rotation start position is generated. Further, as the distance between the connecting pin 3 and the cam contact portion 5 gradually increases, the second member 2 slides in the diametrical direction relative to the first member 1.

That is, since the second member 2 rotates while sliding in the diametrical direction with respect to the first member 1 by the shape setting of the cam edge 6 that restricts and controls this movement, for example, the first member 1 and the second member 2 Are the same shape of each other, or the second member 2 to be rotated is a vertical rectangle with a horizontal width, and the rotation lower side portion has a predetermined width and is rotated 90 degrees as it is. It cannot move or cannot rotate smoothly, or even if it is rotated 90 degrees so that it cannot be rotated about the center position and is horizontally long, it must be in a horizontally long state with the center on one side. However, according to the present invention, the distance between the connecting pin 3 and the cam edge 6 is gradually increased in the initial rotation range of 90 degrees depending on the shape of the cam edge 6. sliding electrolyte second member 2 is diametrically relative (Lifting while) rotates further exceeds the rotational middle position and turn because the distance is shorter to the second member 2 is slid while 90 ° rotation position returns back to the return direction diametrical rotation The design of the cam edge 6 curve degree allows the center connecting pin 3 to be smoothly rotated 90 degrees around the fulcrum without such a problem. Can be defeated.

  In addition, since the distance between the connecting pin 3 and the cam edge 6 is gradually shortened when the position in the middle of the rotation is exceeded in this way, in any rotation direction until the position in the middle of the rotation is exceeded as described above. Also during the rotation, a return urging force is generated by the urging force 7, so that a position holding action for returning to the rotation start position occurs, and the second member 2 is slid with respect to the first member 1. Rotate while lifting so that the right-and-left right angle of is not hindering the rotation. When the slide guide part 4 is moved with respect to the connecting pin 3 against the urging force of the urging force 7 and exceeds the midway position, the urging force of the urging force 7 advances and the urging force is increased. Thus, the return slide guide portion 4 rotates with respect to the connecting pin 3 while sliding in the opposite direction.

  Therefore, if the intermediate position of the rotation is exceeded, it can be rotated with a light force or automatically rotated, and the 90-degree rotation position is held and rotated while being lifted once. The second member 2 is rotated so as to return to the original state.

  In addition, the strength of the return bias force and the forward bias force can be adjusted by setting the strength of the bias force 7 and the degree of change in the distance of the connecting pin 3 of the cam edge 6. It is also possible to lighten the movement or to automatically rotate to the 90 degree position.

  In this way, a return biasing force is generated up to the middle position of rotation, and a rotation biasing force (advance biasing force) can be generated when the middle position of rotation is exceeded, and such a rotation operation can be performed with a simple configuration. It is possible to easily realize the structure that occurs regardless of the forward and reverse directions and the smooth rotation about the center while lifting and returning and sliding as described above.

  Specific embodiments of the present invention will be described with reference to the drawings.

  The present invention is applied to a mobile phone in which a display unit capable of displaying a one-segment TV screen of a mobile phone is rotated 90 degrees from a vertically long display state and is switched to a horizontally long display state with its center as a fulcrum. .

  That is, in this embodiment, a superposition part provided with a display part is provided on a main body part provided with an operation part so as to be able to swing up and down. The base portion 1 is composed of a superposition rotation portion 2 which is superposed on the base portion 1 and is provided so as to be rotatable along the superposition surface, and the display portion is provided on the superposition rotation portion 2. 1 and the superposition | rotation rotation part 2 which provides a display part are connected with the rotation connection apparatus.

  Accordingly, the overlapping rotation unit 2 provided with a rectangular vertically long display unit is configured to be capable of switching 90 degrees forward and backward in the direction of the overlapping surface, and is rotated 90 degrees forward or backward from the vertically long display state. Can be switched to the landscape display state.

  Thus, in this embodiment, the base 1 is used as the first member 1 and the superposition rotation unit 2 provided with the display unit is used as the second member 2 so that the base member 1 can be rotated 90 degrees in both forward and reverse directions. Although it connects by an apparatus, this rotation connection apparatus of a present Example is demonstrated below.

In the center of the plate-like first attachment portion 1A attached to the first member 1 (base portion 1), a long window-like slide guide portion 4 having a length in the diameter direction with respect to the rotation direction is provided, and the second At the center of the plate-like second attachment portion 2A attached to the member 2 (the overlapping rotation portion 2 provided with the display portion), a connecting pin 3 serving as a rotation fulcrum with which the slide guide portion 4 is slidably engaged is provided. Provided.

Further, a cam contact portion 5 is provided at a position in the length direction of the first attachment portion 1A where the slide guide portion 4 is provided, and a cam edge 6 on which the cam contact portion 5 moves along the second attachment portion 2A is provided. A guide groove 9 serving as an inner edge is provided, and the cam contact portion 5 is pressed against the cam edge 6 between the first attachment portion 1A provided with the slide guide portion 4 and the second attachment portion 2A provided with the connecting pin 3. An urging portion 7 that urges to abut is provided.

Specifically, a connecting pin 3 serving as a pivot is provided at the center of the vertical rectangular plate-like second mounting portion 2A, and is relatively slidably engaged with the connecting pin 3 so as to extend in the diameter direction. A long window-like groove having a length is provided as the slide guide portion 4 in the plate-shaped first attachment portion 1A having the same width.

  A cam having a pin-like cam contact portion 5 projecting from the first mounting portion 1A in the length direction position of the slide guide portion 4 and the cam contact portion 5 is engaged so that the inner edge serves as the cam edge 6 The groove 9 is provided in the second mounting portion 2A in a symmetrical shape with the center as a boundary.

Further, the connecting pin 3 is provided with a spring mounting portion 10 extending in the shape of an arm to the left and right so as to rotate in accordance with the rotation of the first mounting portion 1A, and the spring mounting portion 10 and the first mounting portion. The anti-extension spring is connected to 1A as an urging portion 7. That is, one end of a coil spring 7 serving as an anti-extension spring is attached to each of the left and right spring mounting portions 10, and the left and right coil springs 7 are arranged in the opening 11 provided in the plate-like first mounting portion 1A. The other end of each coil spring 7 is locked to the spring locking portion 12 at the inner edge of the opening of the first mounting portion 1A, and the spring mounting portion 10 is moved by the spring bias that the spring 7 tries to contract. The first mounting portion 1 </ b> A is pulled and biased to the connecting pin 3, and the cam groove 9 (cam edge 6) formed in the second mounting portion 2 </ b> A provided with the connecting pin 3 is biased to the cam contact portion 5. to, the cam contact portion 5 provided on the first mounting portion 1A with respect to the cam edge 6 is configured to press contact with the biasing force.

Therefore, when the second member 2 rotates along the overlapping surface with respect to the first member 1, the cam contact portion 5 is pressed against the cam edge 6 by the biasing portion 7, and the cam edge 6 is connected to the connection portion. The slide guide portion 4 is slid relative to the connecting pin 3 in accordance with the change in the distance to the pin 3, and the second member 2 is rotated relative to the first member 1 by the shape of the cam edge 6. It is configured to rotate relative to each other while automatically sliding relative to each other in the diameter direction.

  In the present embodiment, the shape of the cam edge 6 (cam groove 9) includes a position where the connecting pin 3 is provided and a rotation start position where the second member 2 starts to rotate with respect to the first member 1. Is the shape that continues to the connecting pin 3 from the left and right of the rotation start position, and the left and right shapes that the cam abutment portion 5 moves in the forward and reverse directions from the rotation start position are When rotating 90 degrees forward and backward from the rotation start position, the distance from the connecting pin 3 gradually increases to the midway rotation position, and when the midway rotation position is exceeded, the distance gradually decreases. It is possible to rotate in both forward and reverse directions, and to return to the rotation start position by the shape of the cam edge 6 and the pressing force of the biasing portion 7 up to the middle position of rotation. On the contrary, when a return turning biasing force is generated and the turning middle position is exceeded, 90 Turn biasing force to be leaps to the rotational position is configured to produce.

  Specifically, the shape of the cam edge 6 is centered on the position where the connecting pin 3 is provided and the reference position 6A where the cam contact portion 5 is located at the rotation start position. In addition, each of the reference positions 6A is smoothly bent in a mountain shape and has a left-right symmetrical shape that continues to the position of the connecting pin 3, and the cam contact portion 5 is in the center at the reference position 6A when rotating forward and backward from the rotation start position. When moving from left to right, the distance between the connecting pin 3 and the reference position 6A is gradually increased from the reference position 6A until both the forward and reverse rotations are reached. The biasing unit 7 is configured to generate a position holding action when a return rotation biasing force is generated and is at the reference position 6A, and when the rotation middle position is exceeded, the distance to the connecting pin 3 is gradually increased. This turning position as a shortened shape Than the in the position where the biasing force rotating by the biasing portion 7 is caused forward and reverse and any of the 90-degree rotation pivot is constituted such that the position retention action is generated.

In this embodiment, the distance between the connecting pin 3 and the cam edge 6 is gradually increased in the initial rotation range of 90 ° rotation due to the shape of the cam edge 6, so that the second member with respect to the first member 1 is increased. 2 slides in the diametrical direction with respect to the rotational direction (rotates while rotating), and further exceeds the midway rotational position, the distance becomes shorter, so the second member 2 is now in the diametrical return direction. Since the cam slide 6 is designed to turn to the 90 ° turning position while moving back, the cam edge 6 cannot be turned due to the interference of the left and right corners of the lower side of the second member 2. However, it can be smoothly rotated 90 degrees around the center connecting pin 3 as a fulcrum so that it can escape while being lifted, and the center can be tilted into a horizontally long state without moving to one side.

  That is, since the distance between the connecting pin 3 and the cam edge 6 is gradually shortened when the rotation halfway position is exceeded in this way, as described above, in any rotation direction until the rotation middle position is exceeded. Also during the rotation, a return urging force is generated by the urging force 7, so that a position holding action for returning to the rotation start position occurs, and the second member 2 is slid with respect to the first member 1. Rotate while lifting so that the right-and-left right angle of is not hindering the rotation. When the slide guide part 4 is moved with respect to the connecting pin 3 against the urging force of the urging force 7 and exceeds the midway position, the urging force of the urging force 7 advances and the urging force is increased. Thus, the return slide guide portion 4 rotates with respect to the connecting pin 3 while sliding in the opposite direction.

  Therefore, if the intermediate position of the rotation is exceeded, it can be rotated with a light force or automatically rotated, and the 90-degree rotation position is held and rotated while being lifted once. The second member 2 is rotated so as to return to the original state.

  Note that the present invention is not limited to the embodiments, and the specific configuration of each component can be designed as appropriate.

It is explanatory perspective view which shows the use condition in the state which rotated 90 degree | times and switched from the portrait display state to the landscape display state of a present Example. It is a description perspective view of the rotation coupling device of a present Example. It is a description exploded perspective view of the principal part of the rotation coupling device of a present Example. It is an explanation exploded perspective view of a rotation connecting device of this example. It is a description front view of the use condition of a present Example. It is explanatory side sectional drawing (in a portrait display state and a landscape display state) of the use condition of a present Example. It is explanatory front view in the middle of rotation from the vertically long display state of this embodiment to the horizontally long display state. It is a description front view of the state which completed 90 degree rotation from the vertically long display state of this example to the horizontally long display state. FIG. 9 is an explanatory front view of a state in which the rotation of 90 degrees from the vertically long display state to the horizontally long display state is completed (a state in which rotation of 90 degrees is completed in a direction opposite to that in FIG. 8) according to the present embodiment.

DESCRIPTION OF SYMBOLS 1 1st member 1A 1st attachment part 2 2nd member 2A 2nd attachment part 3 Connecting pin 4 Slide guide part 5 Cam contact part 6 Cam edge 6A Reference position 7 Energizing part 9 Cam groove
10 Spring mounting part

Claims (7)

A rotation coupling device that couples a first member and a second member in a superposed state so as to be pivotable along the superposition surface, a coupling pin serving as a pivotal fulcrum, and the coupling pin with respect to the rotation direction Either one of the slide guide portion that is slidably engaged in the diametrical direction and has a length in the sliding direction is provided in the first member or the first mounting portion that is attached to the first member, and the other is provided . the second member or in set only to the second attachment portion attached to the second member, wherein relative to the first member second member to freely rotate relative along the polymer surface freely relative sliding in the diameter direction configured so that, provided in the first member or the first mounting portion either between the cam edge abuts to the scanning movement when the cam abutment cams abutment Toko is relative rotation any said second member youth the other Ku is only set to the second mounting portion, the provided urging portion cam contact portion biases to press contact with the cam edge, said second member is polymerized surface relative to the first member And the slide guide with respect to the connection pin according to a change in the distance between the cam edge and the connection pin while the cam contact portion is pressed against the cam edge by the biasing portion. part moves relative slide, automatically configured to rotate relative with relative sliding movement in the sliding direction of the diameter direction the second member relative to the first member by the shape of the cam edge, The shape of the cam edge is centered on the position where the connecting pin is provided and the rotation start position where the second member starts to rotate with respect to the first member, and the shape of the cam edge is from the left and right of the rotation start position, respectively. The shape continues to the connecting pin position, and the rotation starts The left and right shapes of the cam abutting portion that move in the forward / reverse direction from the mounting position are rotated by 90 ° in the forward / reverse direction from the rotation start position. It is set to a shape that gradually increases to the middle position of movement, and gradually decreases when the middle position of rotation is exceeded, and can be rotated in either the forward or reverse direction. When the shape of the cam edge and the pressing force of the urging portion cause a return rotation urging force to return to the rotation start position, the rotation toward the 90 ° rotation position is reversed when the rotation intermediate position is exceeded. A rotation connecting device characterized in that a dynamic biasing force is generated. The first attachment portion attached to the first member is provided with the slide guide portion having a length in the sliding direction in the diameter direction, and the slide guide portion is relative to the second attachment portion attached to the second member. A connecting pin serving as a pivot for slidably engaging is provided, the cam contact portion is provided at a longitudinal position of the first mounting portion where the slide guide portion is provided, and the second mounting portion is provided with the the cam edge cam contact portion is the scanning movement is provided, the slide guide portion and the first mounting portion provided with the cam contact portion is the cam between the connecting pin the second mounting portion having a The rotation connecting device according to claim 1, wherein the urging portion that urges the edge so as to press and contact the edge is provided. The connecting pin serving as a rotation fulcrum is protruded from the plate-like second attaching portion attached to the second member, and is slidably engaged with the connecting pin and has a length in the sliding direction in the diameter direction. The long window-like slide guide portion is provided in the plate-like first attachment portion that is attached to the first member, and the pin-like cam contact portion is provided at a position in the length direction of the slide guide portion of the first attachment portion. A cam groove that engages with the cam contact portion and has an inner edge as the cam edge is provided in the second attachment portion, and a spring attachment portion is provided rotatably on the connecting pin. The rotation coupling device according to claim 2, wherein an anti-extension spring is coupled to the first attachment portion as the biasing portion.   The shape of the cam edge is a mountain shape from the reference position with the center line as a center with the position where the connecting pin is provided and the reference position where the cam contact portion is located at the rotation start position. When the cam contact portion moves from the central reference position to the left and right during the forward / reverse rotation from the rotation start position, In any reverse rotation, the distance to the connecting pin is gradually increased compared to the reference position until the middle position of the rotation, and a return rotation biasing force is generated by the biasing portion until the middle position of the rotation. It is configured so that a position holding action is generated when it is at the reference position, and when the intermediate position is exceeded, the distance to the connecting pin is gradually shortened. Rotate by part Forces resulting pivotal connecting device according to any one of claims 1 to 3, characterized by being configured so that the position retention action occurs at a position forward and reverse and any of the 90-degree rotation pivot.   A base part and a superposition turning part that is superposed on the base part and provided so as to be rotatable along the superposition surface are connected by a turning connecting device, and the turning connecting device connects the base part to the first member. Alternatively, the rotation connection device according to any one of claims 1 to 4, wherein the rotation connection device is the second member, and the overlapping rotation portion is the second member or the first member. Electronic equipment using the device.   A superposition part provided with a display part is provided on the main body part provided with the operation part so as to be able to swing up and down, and a superposition part provided with the display part is provided on the base part provided on the main body part so as to be able to turn up and down. A superposition rotation part which is superposed on the base part and is provided so as to be rotatable along the superposition surface. The superposition rotation part is provided with the display part and is provided with the base part and the display part. The rotation connecting device includes the base portion as the first member or the second member, and the overlapping rotation portion as the second member or the first member. The electronic apparatus using the rotation coupling device according to claim 5, wherein the rotation coupling device according to claim 1 is used.   The superposition rotation part provided with the display part is configured to be able to rotate 90 degrees forward and reverse in the direction of the superposition surface, and it is turned 90 degrees forward or reverse from the vertical display state to switch to the horizontal display state. The electronic apparatus using the rotation connecting device according to any one of claims 5 and 6, wherein the electronic device is freely configured.

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