JP5181884B2 - Portable electronic devices - Google Patents

Description

  The present invention relates to a portable electronic device typified by a mobile phone, a PDA (Personal Digital Assistant), and the like, and more particularly to a connection structure of two or more housings constituting the portable electronic device.

  In recent years, it has become possible to view one-seg broadcasting, images of personal computer applications, web pages, and the like on a display unit (for example, a liquid crystal display) included in a portable electronic device. Along with this, portable electronic devices that can change the orientation of the housing in which the display unit is provided have become widespread so that the display unit is horizontally long.

  Patent Document 1 discloses that a first housing having an operation unit, a second housing having a display unit, and a second housing that slides and rotates relative to the first housing. A portable information terminal including a rotation coupling mechanism that couples a first housing and a second housing is disclosed. In the rotary coupling mechanism disclosed in Patent Document 1, the second casing is in a closed state covering the entire operation unit of the first casing, and the second casing is operated in the first casing. It is configured to be able to shift from one state of the open state that is left-right symmetric with respect to the center line of the first housing to the other state by rotating operation.

  Further, Patent Document 1 discloses a rotary coupling mechanism shown in FIG. 13 includes a first cam hole 201a and a second cam hole 201b provided in the bottom plate 2c of the second housing 2, and a first cam hole 201a and a second cam hole 201b. The first pin 202a and the second pin 202b are inserted through the first pin 202b and the second pin 202b, respectively. The first cam hole 201a and the second cam hole 201b have a shape in which two arc-shaped holes intersect. On the other hand, each of the first pin 202 a and the second pin 202 b is fixed to the surface of the first housing 1. A first flange portion 202c and a second flange portion 202d are provided at the tip of each of the first pin 202a and the second pin 202b. The first flange portion 202 c and the second flange portion 202 d prevent the first pin 202 a and the second pin 202 b from coming out of the cam hole 201.

The operation of the first casing 1 and the second casing 2 connected by the rotary connecting mechanism shown in FIG. 13 will be described with reference to FIG. According to Patent Document 1, in the closed state, the second casing 2 covers the entire operation unit of the first casing 1 (FIG. 14A). When the second housing 2 is pushed up with the thumb of the right hand holding the first housing 1 from the state shown in FIG. 14A, the first pin 202a is moved along the first cam hole 201a. Slide. As a result, the second housing 2 rotates clockwise relative to the first housing 1 around the second pin 202b, and the second housing 2 gradually moves relative to the first housing 1. (FIG. 14B). When the second casing 2 is rotated 90 ° clockwise with respect to the first casing 1, an operation unit (not shown) of the first casing 1 is exposed and the second casing 2 is exposed. Is symmetric with respect to the center line of the first housing 1. At this time, the external shape of the portable information terminal is substantially “T” (FIG. 14C). Note that paragraph [0152] of Patent Document 1 clearly states that the first pin 202a and the second pin 202b are fixed to the surface of the first housing 1. Therefore, the description of “the first pin 202a slides along the first cam hole 201a” in Patent Document 1 does not mean that the first pin 202a actually slides. It seems that the pin 202a slides relative to the first cam hole 201a.
JP 2006-19925 A

  The portable electronic device as disclosed in Patent Document 1 has the following problems. That is, in this portable electronic device, when the first casing and the second casing are in an open state, the surface of the first casing on which the operation section is provided and the display section are provided. It is parallel to the surface of the second housing. However, when operating the operation unit provided in the first casing while viewing the image displayed on the display unit provided in the second casing, the surface of the first casing and It is desirable that the surface of the second housing has a predetermined angle from the viewpoint of improving the operability of the operation unit and the visibility of the display unit. In the case where the portable electronic device is a mobile phone, it is common to provide a receiver on the surface of the first casing and a transmitter on the surface of the second casing. Also in this case, it is desirable from the viewpoint of improving the call performance that the surface of the first housing and the surface of the second housing have a certain angle.

  Furthermore, the rotary coupling mechanism disclosed in Patent Document 1 has the following problems. In this rotary coupling mechanism, the display unit is always horizontally long when the operation unit is exposed. However, a vertically long display unit is suitable for displaying a list such as an incoming call history. This is because, in general, a vertically long display unit can display a larger number of images on one screen than a horizontally long display unit. Therefore, when the user operates the operation unit while viewing the list display, the amount of information displayed on the display unit is smaller than that of a conventional folding mobile phone.

  Moreover, in the said rotation connection mechanism, the cam hole is provided in one housing | casing and the pin is provided in the other housing | casing. When one housing rotates relative to the other housing, the pin slides along the cam hole. Therefore, the rotation amount (rotation range) of the housing depends on the length of the cam hole (arc length). For this reason, in order to increase the amount of rotation of the housing, it is necessary to extend the cam hole. However, when the cam hole is extended, the area of the cam hole increases. In other words, the hole opened in the housing becomes larger. When the hole opened in the casing is increased, the rigidity of the casing is lowered, in particular, the torsional rigidity is lowered. In other words, in the rotary coupling mechanism disclosed in Patent Document 1, the rigidity of the casing decreases as the amount of rotation of the casing increases.

  Further, in the rotary coupling mechanism disclosed in Patent Document 1, two cam holes intersect. Therefore, in the process of sliding the pin along the cam hole, the pin passes through the intersection of the two cam holes. At this time, there is a possibility that the pin may be caught in a corner near the intersection of the cam holes, or the pin may enter an unintended cam hole.

  An object of the present invention is to solve at least one of the above problems.

A portable electronic device according to the present invention includes a first casing having a display portion provided on a surface thereof, a second casing having an operation portion provided on a surface thereof, and the first casing and the second casing. And a coupling mechanism for coupling the two to each other in a rotatable manner. The first casing is overlaid on the second casing such that the back surface opposite to the surface thereof faces the surface of the second casing, and is rotatable on the second casing. At least a portion of the back surface of the first housing and at least a portion of the surface of the second housing are curved surfaces, and the first housing is rotated when the first housing rotates on the second housing. The curved surface provided on the back surface of the body slides on the curved surface provided on the surface of the second housing. The curved surface provided on the back surface of the first housing is a convex surface, and the curved surface provided on the surface of the second housing is a concave surface corresponding to the convex surface. The coupling mechanism is a closed state in which the operation unit of the second housing is covered by the first housing, the operation unit is exposed, and the first housing and the center line of the second housing intersect. Rotating operation from one state of one open state and the second open state where the operation unit is exposed and the center line of the first housing and the second housing coincide with each other The first housing and the second housing are connected so that they can be made. The coupling mechanism includes a first guide groove and a second guide groove provided on the back surface of the first housing, and a third guide groove and a fourth guide groove provided on the surface of the second housing. And a first shaft that passes through the first guide groove and the third guide groove, and a second shaft that passes through the second guide groove and the fourth guide groove. The first guide groove and the second guide groove are in a line-symmetrical position with the center line of the first housing as the axis of symmetry, and the first guide groove is the starting point of the second guide groove. The second guide groove is formed along an arc centered on the starting point of the first guide groove. The third guide groove and the fourth guide groove are in a line-symmetrical position with the center line of the first housing as the axis of symmetry in the first open state, and the third guide groove is the fourth guide groove. The fourth guide groove is formed along an arc centered on the start point of the third guide groove.

  According to the present invention, at least one of the above problems is solved.

(Embodiment 1)
Hereinafter, an example of an embodiment of the present invention will be described in detail with reference to the drawings. The portable electronic device of this example includes a first casing (hereinafter referred to as “upper casing”) provided with a liquid crystal display as a display unit, an input key as an operation unit, an input touch panel, and a scroll key. Etc. (hereinafter collectively referred to as “input keys”) is a mobile phone that is rotatably connected by a connection mechanism to a second housing (hereinafter referred to as “lower housing”). In the following description, the surface of the upper housing provided with the liquid crystal display is referred to as a front surface, and the back surface opposite to the front surface is referred to as a rear surface. Further, the surface of the lower housing provided with the input keys is called a front surface, and the back surface opposite to the front surface is called a rear surface. In order to facilitate understanding, the connection state and the rotation operation of the upper casing and the lower casing according to the above definition will be outlined with reference to FIG.

  The upper housing 10 and the lower housing 20 are either in a closed state (FIG. 1A), a first open state (FIG. 1B), or a second open state (FIG. 1C). It is connected by a connection mechanism so that it can shift from one state to another state by a rotating operation. That is, the upper housing 10 and the lower housing 20 are coupled so as to be rotatable by 180 degrees at the maximum.

  The closed state shown in FIG. 1A is a state in which substantially the entire front surface (at least the area where the input keys are arranged) of the lower housing 20 is covered with the upper housing 10. In the first open state shown in FIG. 1B, the input key arrangement area of the lower casing 20 is exposed, and the upper casing 10 is symmetrical with respect to the center line BB of the lower casing 20. It is in the state. In the second open state shown in FIG. 1C, the input key arrangement area of the lower housing 20 is exposed, and the center line AA of the upper housing 10 and the center line BB of the lower housing 20 are exposed. Are coincident on the same straight line.

  For convenience of drawing, in FIG. 1C, the upper housing 10 and the lower housing 20 are shown in parallel. Actually, however, the upper housing 10 and the lower housing 20 form a predetermined angle in the second open state. Details will be described later. The center line AA of the upper housing 10 is a straight line that is orthogonal to the short side of the upper housing 10 and bisects the short side. Further, the center line BB of the lower housing 20 is a straight line that is orthogonal to the short side of the lower housing 20 and bisects the short side.

  FIG. 2 is a schematic perspective view showing the rear surface of the upper housing 10. FIG. 2 shows the rear surface seen through from the front surface side. As shown in FIG. 2, a first guide groove 31 and a second guide groove 32 are formed on the rear surface of the upper housing 10. The first guide groove 31 and the second guide groove 32 are line symmetric with respect to the center line AA of the upper housing 10 as an axis of symmetry.

The first guide groove 31 is formed along an arc centered on one end (start point P ₁₂ ) of the second guide groove 32. Further, the arc length (arc length of the first guide groove 31) is one quarter of the circumference of a circle around the start point P _12. Among the two ends of the second guide groove 32, the end that is remote from the relatively central line A-A is the start point P _12. Arc length of the first guide groove 31 may be less than one quarter of the circumference of a circle around the start point P _12.

On the other hand, the second guide groove 32 is formed along an arc centered on one end (start point P ₁₁ ) of the first guide groove 31. Further, the arc length (arc length of the second guide groove 32) is one quarter of the circumference of a circle around the start point P _11. Among the two ends of the first guide groove 31, the end that is remote from the relatively central line A-A is the start point P _11. Arc length of the second guide groove 32, the start point P ₁₁ may be less than one quarter of the circumference of a circle centered on the.

Moreover, the radius of a circle centered on the circle and the starting point P ₁₁ around the start point P ₁₂ is the same. That is, the first guide groove 31 and the second guide groove 32 have the same length and the same curvature.

  FIG. 3 is a schematic plan view of the front surface of the lower housing 20. As shown in FIG. 3, a third guide groove 33 and a fourth guide groove 34 are formed on the front surface of the lower housing 20. The third guide groove 33 and the fourth guide groove 34 are line symmetric with respect to the center line AA of the upper casing 10 in the first open state (FIG. 1B).

The third guide groove 33 is formed along an arc centered on one end (start point P ₁₄ ) of the fourth guide groove 34. Further, the arc length (arc length of the third guide groove 33) is one quarter of the circumference of a circle around the start point P _14. Among the two ends of the fourth guide groove 34, the end that is remote from the relatively central line A-A is the start point P _14. Arc length of the third guide groove 33, the start point P ₁₄ may be less than one quarter of the circumference of a circle centered on the.

On the other hand, the fourth guide groove 34 is formed along an arc centered on one end (start point P ₁₃ ) of the third guide groove 33. Further, the arc length (arc length of the fourth guide grooves 34) is one quarter of the circumference of a circle around the start point P _13. Of the two ends of the third guide groove 33, the end that is remote from the relatively central line A-A is the start point P _13. Arc length of the fourth guide groove 34, may be less than one quarter of the circumference of a circle around the start point P _13.

Further, the radius of the circle centered on the start point P ₁₄ and the circle centered on the start point P ₁₃ are the same. That is, the third guide groove 33 and the fourth guide groove 34 have the same length and the same curvature.

  FIG. 4 schematically shows a connected state of the upper housing 10 and the lower housing 20. As shown in FIG. 4, the upper housing 10 and the lower housing 20 are rotatably connected by two shaft pins 41 and 42. In other words, they are connected so as to be able to shift from one state of the closed state, the first open state, or the second open state to another state by a rotating operation. Specifically, the first shaft pin 41 that passes through the first guide groove 31 and the third guide groove 33 and the second shaft that passes through the second guide groove 32 and the fourth guide groove 34. The shaft pins 42 are connected as described above. That is, the coupling mechanism includes at least the first guide groove 31 to the fourth guide groove 34, the first shaft pin 41, and the second shaft pin 42.

  At both ends of the first shaft pin 41, flange portions 41 a having a diameter larger than the widths of the first guide groove 31 and the third guide groove 33 are provided. The flange portion 41 a is engaged with the peripheral edges of the first guide groove 31 and the third guide groove 33 to prevent the first shaft pin 41 from coming off from the first guide groove 31 and the third guide groove 33. doing. A flange portion 42 a having a diameter larger than the width of the second guide groove 32 and the fourth guide groove 34 is also provided at both ends of the second shaft pin 42. The flange portion 42 a is engaged with the peripheral edges of the second guide groove 32 and the fourth guide groove 34 to prevent the second shaft pin 42 from coming off from the second guide groove 32 and the fourth guide groove 34. doing. In FIG. 4, only the flange portions 41a and 42a provided at the respective one ends of the first shaft pin 41 and the second shaft pin 42 are illustrated, but a similar flange portion is provided at the other end. Is provided.

  Next, the relative positional relationship of the first guide groove 31 to the fourth guide groove 34 in the closed state, the first open state, and the second open state will be described with reference to FIGS. The relative positional relationship also changes with time as the state changes. Here, the relative positional relationship in each state will be described, and the process of change will be described in detail later.

FIG. 5 shows the relative positional relationship between the first guide groove 31 and the fourth guide groove 34 in the closed state. As shown in the figure, in the closed state, the start point P _{11 of} the first guide groove 31 coincides with the start point P _{13 of} the third guide groove 33. Further, the end point P _{22 of} the second guide groove 32 and the end point P _{24 of} the fourth guide groove 34 coincide. The end point means the end of each guide groove opposite to the start point. In the following description, the end point of the first guide groove 31 is referred to as “end point P ₂₁ ”, and the end point of the third guide groove 33 is referred to as “end point P ₂₃ ” (see FIGS. 2 and 3).

Refer to FIG. 5 again. In the closed state, the first shaft pin 41 exists at the start point P _{11 of} the first guide groove 31 and the start point P ₁₃ of the third guide groove 33 that coincide with each other as described above. More specifically, the first shaft pin 41 is located at the overlapping point of the two starting points P ₁₁ and P ₁₃ and is temporarily fixed by a locking mechanism (not shown). On the other hand, the second shaft pin 42 exists at the end point P _{22 of} the second guide groove 32 and the end point P ₂₄ of the fourth guide groove 34 that coincide with each other as described above. More specifically, the second shaft pin 42 is located at the overlapping point of the two end points P ₂₂ and P ₂₄ and is temporarily fixed by a locking mechanism (not shown). In FIG. 5, illustration of the flange portions 41a and 42a (FIG. 4) of the shaft pins 41 and 42 is omitted.

FIG. 6 shows the relative positional relationship of the first guide groove 31 to the fourth guide groove 34 in the first open state. As shown in the figure, in the first open state, the start point P _{11 of} the first guide groove 31 coincides with the start point P _{13 of} the third guide groove 33. Further, the start point P _{12 of} the second guide groove 32 and the start point P _{14 of} the fourth guide groove 34 coincide.

If attention is paid to two axes pins 41 and 42, the first having been positioned in the overlap point of the start point P ₁₃ of the start point P ₁₁ and the third guide groove 33 of the first guide groove 31 when the closed state The shaft pin 41 is not displaced during the transition from the closed state to the first open state, and remains at the overlapping point of the starting points P ₁₁ and P ₁₃ consistently. While the second shaft pin 42 is temporarily fixed to the overlap point of the end point P ₂₂ of the second guide groove 32 and the end point P ₂₄ of the fourth guide groove 34 when the closed state, first from the closed state In the process of shifting to the one open state, the temporary fixing is released, and finally, it moves to the overlapping point of the start point P ₁₂ of the second guide groove 32 and the start point P _{14 of} the fourth guide groove 34. Further, the second shaft pin 42 having moved to the overlap point of the second start point P ₁₂ of the guide groove 32 of the start point P ₁₄ of the fourth guide groove 34 is temporarily fixed again by not shown locking mechanism . The process of movement of the second shaft pin 42 will be described in detail later.

FIG. 7 shows the relative positional relationship between the first guide groove 32 and the fourth guide groove 34 in the second open state. As shown in the figure, in the second open state, the end point P _{21 of} the first guide groove 31 and the end point P _{23 of} the third guide groove 33 coincide. Further, the start point P _{12 of} the second guide groove 32 and the start point P _{14 of} the fourth guide groove 34 coincide.

Paying attention to two pivot pins 41 and 42, it is temporarily fixed in the overlapping point of the start point P ₁₃ of the start point P ₁₁ and the third guide groove 33 of the first guide groove 31 when the first open state The temporarily fixed first shaft pin 41 is released in the process of transition from the first open state to the second open state, and finally the end point P ₂₁ of the first guide groove 31 and the third end moving of the overlapping point of the end point P ₂₃ of the guide groove 33. The first shaft pin 41 having moved to the overlap point of the end point P ₂₃ of the end point P ₂₁ and the third guide groove 33 of the first guide groove 31 is temporarily fixed again by not shown locking mechanism. The process of movement of the first shaft pin 41 will be described in detail later. While the second shaft pin 42 is located in the overlap point of the start point P ₁₄ of the start point P ₁₂ of the second guide groove 32 when the first open state the fourth guide groove 34, a first In the process of shifting from the open state to the second open state, there is no displacement, and it remains at the overlapping point of the starting points P ₁₂ and P ₁₄ consistently.

  Next, the rotational operation of the upper housing 10 and the lower housing 20, the accompanying change in the relative positional relationship of the first guide groove 31 to the fourth guide groove 34, and the movement state of the shaft pins 41 and 42 will be described. To do. In addition, the upper housing | casing 10 and the lower housing | casing 20 can rotate relatively. However, the description here assumes that the lower housing 20 is fixed and the upper housing 10 is rotated.

In order to shift from the state shown in FIG. 5 (closed state) to the state shown in FIG. 6 (first open state), a counterclockwise rotational force is applied to the upper casing 10 shown in FIG. For example, the lower casing 20 is held with the left hand, and the upper casing 10 is rotated counterclockwise with the right hand. Alternatively, the mobile phone is placed on the palm of the left hand, and the lower side surface of the upper housing 10 is pushed upward with the thumb of the left hand upward. Then, as shown in FIG. 8, the upper housing 10 to which the rotational force is applied is located at an overlapping point between the start point P _{11 of} the first guide groove 31 and the start point P _{13 of} the third guide groove 33. The rotation starts counterclockwise with the first shaft pin 41 as the rotation axis. At this time, the second guide groove 32 moves on the fourth guide groove 34 along the guide groove 34 (the second guide groove 32 traces the fourth guide groove 34). On the other hand, the first guide groove 31 rotates counterclockwise with the first shaft pin 41 (start point P ₁₁ ) as a rotation axis. At this time, the second shaft pin 42 located at the overlapping point between the end point P _{22 of} the second guide groove 32 and the end point P _{24 of} the fourth guide groove 34 does not move but stops at the same point. ing. Further, the locking of the second shaft pin 42 by the locking mechanism is not released.

Thereafter, when the upper housing 10 is further rotated counterclockwise, the second guide groove 32 completely overlaps the fourth guide groove 34 as shown in FIG. That is, the start point P _{12 of} the second guide groove 32 and the end point P _{24 of} the fourth guide groove 34 coincide with each other, and the inner surface of the second guide groove 32 contacts the second shaft pin 42. In other words, the end point P _{22 of} the second guide groove 32 and the start point P _{14 of} the fourth guide groove 34 coincide. During this time, the first guide groove 31 rotates counterclockwise around the first shaft pin 41 (start point P ₁₁ ) as a rotation axis.

When the upper housing 10 is further rotated counterclockwise from the state shown in FIG. 9, the second shaft pin 42 is pushed by the inner surface of the second guide groove 32. When the pressing force on the second shaft pin 42 exceeds a predetermined value, the locking of the second shaft pin 42 by the locking mechanism is released, and the upper housing 10 can be further rotated counterclockwise. Thereafter, as the upper housing 10 rotates, the second guide groove 32 moves along the fourth guide groove 34 while pushing and moving the second shaft pin 42. During this time, the second shaft pin 42 also moves in the fourth guide groove 34 from the end point P ₂₄ of the fourth guide groove 34 toward the start point P ₁₄ . The first guide groove 31 rotates counterclockwise with the first shaft pin 41 (start point P ₁₁ ) as a rotation axis. Thus, the transition from the closed state shown in FIG. 5 to the first open state shown in FIG. 6 is performed.

As described above, in the process of shifting from the closed state to the first open state, the first shaft pin 41 serves as the rotation shaft of the upper housing 10. The second guide groove 32 traces the fourth guide groove 34. Further, the second shaft pin 42 is pushed and moved by the second guide groove 32 and moves in the fourth guide groove 34 from the end point P ₂₄ to the start point P ₁₄ . Then, the second shaft pin 42 that has moved to the start point P _{14 of} the fourth guide groove 34 (overlapping with the start point P _{12 of} the second guide groove 32) is temporarily fixed again by the locking mechanism. . Therefore, the upper housing 10 and the lower housing 20 are temporarily fixed in the first open state.

Next, the transition from the first open state shown in FIG. 6 to the second open state shown in FIG. 7 will be described. In order to shift from the first open state to the second open state, a force is applied to the upper casing 10 shown in FIG. 6 to rotate the upper casing 10 counterclockwise. For example, the lower casing 20 is held with the left hand, and the upper casing 10 is rotated counterclockwise with the right hand. Then, as shown in FIG. 10, the upper housing 10 to which the rotational force is applied is located at the overlapping point between the start point P _{12 of} the second guide groove 32 and the start point P _{14 of} the fourth guide groove 34. The rotation is started using the second shaft pin 42 as a rotation axis. At this time, the first guide groove 31 moves on the third guide groove 33 along the guide groove 33 (the first guide groove 31 traces the third guide groove 33). On the other hand, the second guide groove 32 rotates counterclockwise around the second shaft pin 42 (start point P ₁₂ ). At this time, the first shaft pin 41 located at the overlapping point between the starting point P _{11 of} the first guide groove 31 and the starting point P _{13 of} the third guiding groove 33 does not move but stops at the same overlapping point. ing. Further, the locking of the first shaft pin 41 by the locking mechanism is not released.

Thereafter, when the upper housing 10 is further rotated counterclockwise, the first guide groove 31 completely overlaps with the third guide groove 33 as shown in FIG. That is, the end point P _{21 of} the first guide groove 31 and the start point P _{13 of} the third guide groove 33 coincide with each other, and the inner surface of the first guide groove 31 contacts the first shaft pin 41. In other words, the start point P _{11 of} the first guide groove 32 and the end point P _{23 of} the third guide groove 33 coincide. During this time, the second guide groove 32 rotates counterclockwise with the second shaft pin 42 (starting point P ₁₂ ) as the rotation axis.

When the upper housing 10 is further rotated counterclockwise from the state shown in FIG. 11, the first shaft pin 41 is pushed by the inner surface of the first guide groove 31. When the pressing force on the first shaft pin 41 exceeds a predetermined value, the locking of the first shaft pin 41 by the locking mechanism is released. Then, the upper housing 10 can be further rotated counterclockwise. Thereafter, as the upper housing 10 rotates, the first guide groove 31 moves along the third guide groove 33 while pushing and moving the first shaft pin 41. During this time, the first shaft pin 41 also moves in the third guide groove 33 along the guide groove 33. The second guide groove 32 rotates counterclockwise with the second shaft pin 42 (start point P ₁₂ ) as a rotation axis. As described above, the transition from the first open state shown in FIG. 6 to the second open state shown in FIG. 7 is performed.

As described above, in the process of shifting from the first open state to the second open state, the second shaft pin 42 serves as the rotation shaft of the upper housing 10. The first guide groove 31 traces the third guide groove 33. Further, the first shaft pin 41 is pushed and moved by the first guide groove 31 and moves in the third guide groove 33 from the start point P ₁₃ to the end point P ₂₃ of the third guide groove 33. Then, the first shaft pin 41 moved to the end point P _{23 of} the third guide groove 33 (overlapping with the end point P _{21 of} the first guide groove 31) is temporarily fixed again by the locking mechanism. . Therefore, the upper housing 10 and the lower housing 20 are temporarily fixed in the second open state.

  As described above, the upper housing 10 and the lower housing 20 can be shifted from the closed state to the first open state and the second open state. In addition, if it rotates in the reverse direction to the above, it can transfer from a 2nd open state to a 1st open state and a closed state (it can return to an original state). In addition, the orientation of the image or video displayed on the liquid crystal display automatically changes as the state changes.

  Further, as shown in FIG. 12A, the rear surface of the upper housing 10 and the front surface of the lower housing 20 are curved surfaces. More specifically, the rear surface of the upper housing 10 is a convex surface that bulges toward the front surface of the lower housing 20. On the other hand, the front surface of the lower housing 20 is a concave surface corresponding to the rear surface of the upper housing 10 (accepting the rear surface). During the rotating operation as described above, the rear surface (convex surface) of the upper housing 10 slides on the front surface (concave surface) of the lower housing 20. Accordingly, the upper housing 10 gradually rises with respect to the lower housing 20 in the process of shifting from the first open state shown in FIG. 1B to the second open state shown in FIG. As a result, as shown in FIG. 12B, in the second open state, the angle θ formed by the front surface of the upper housing 10 and the rear surface of the lower housing 20 is in the range of 160 degrees to 170 degrees. Is a predetermined angle. Therefore, the front surface of the upper housing 10 provided with the liquid crystal display and the front surface of the lower housing 20 provided with the input key have a predetermined angle within a range of approximately 160 degrees to 170 degrees. become.

  The upper housing 10 can be displaced in the axial direction of the shaft pins 41 and 42 so that the upper housing 10 can gradually rise with respect to the lower housing 20, and an elastic member (not shown) (not shown). For example, it is pressed against the lower housing 20 by a coil spring wound around the shaft pins 41 and 42. In other words, the rear surface (convex surface) of the upper housing 10 is in pressure contact with the front surface (concave surface) of the lower housing 20. Moreover, you may comprise the said convex surface and a concave surface with the some curved surface from which a curvature differs.

  8 to 11, the diameters of the first shaft pin 41 and the second shaft pin 42 are shown to be thinner than actual for convenience of drawing. Actually, the first shaft pin 41 and the second shaft pin 42 have substantially the same diameter as the width of each guide groove 31 to 34. Therefore, the first shaft pin 41 and the second shaft pin 42 do not rattle within the guide grooves 31 to 34.

  The closed state is suitable for use of an application that does not require an input key operation. For example, when a camera is provided on the rear surface of the lower housing 20 and an operation button (for example, a shutter button) is provided on the side surface of the upper housing 10 or the lower housing 20, the user can Operate the operation buttons while confirming the captured image of the camera on the provided liquid crystal display. The closed state is suitable for such situations. The closed state is also suitable when viewing one-segment broadcasting on a liquid crystal display provided in the upper housing 10.

  In the first open state, the center line AA of the upper housing 10 and the lower housing BB are orthogonal to each other, and the input keys provided on the lower housing 20 are exposed. That is, the liquid crystal display provided in the upper housing 10 is turned sideways, and the input keys provided in the lower housing 20 can be operated. Therefore, the first open state is suitable for browsing web pages and the like. When browsing a Web page, an operation such as operating an input key to input a URL is required, so the first open state is suitable instead of the closed state. The first open state is also suitable when the operation of the input key is required during viewing of the one-segment broadcasting.

  In the second open state, the center line AA of the upper casing 10 and the lower casing BB coincide on the same straight line. That is, the liquid crystal display provided in the upper casing 10 is in a vertical orientation, and the input keys provided in the lower casing 20 can be operated. Therefore, the state is substantially the same as the open state of the conventional folding cellular phone, which is suitable for browsing and creating e-mails and e-mails.

  Until now, the case where the upper housing | casing 10 was rotated counterclockwise with respect to the lower housing | casing 20 was demonstrated. However, by forming the first guide groove 31 and the third guide groove 33 in the lower housing 20 and forming the second guide groove 32 and the fourth guide groove 34 in the upper housing 10, the lower housing The upper housing 10 can also be rotated clockwise with respect to the body 20. Further, clockwise rotation can also be realized by reversing the third guide groove 33 and the fourth guide groove 34 shown in FIG.

  Further, the first or second guide groove may be formed at a position offset to the left or right from the center line of the housing. When the first or second guide groove is offset, the upper casing in the first open state becomes asymmetrical with respect to the lower casing. Accordingly, the center of the liquid crystal display provided in the upper casing is offset to the left or right side of the center line AA of the lower casing. For example, when the lower housing is used with the right hand, it is easier to use if the center of the liquid crystal display is located on the left side of the center line AA of the lower housing. This is because if the center of the liquid crystal display is located on the left side of the center line AA of the lower casing, the liquid crystal display can be moved to the front of the face without moving the right hand holding the lower casing to the front of the face. It is because it can be located in.

  When using the lower housing with the left hand, if the center of the liquid crystal display is located on the right side of the center line AA of the lower housing, the left hand holding the lower housing should be in front of the face. The liquid crystal display can be positioned in front of the face without being moved to. For design reasons, the upper housing in the first open state may be offset with respect to the center line of the lower housing.

  As described above, in the present invention, the guide grooves necessary for rotatably connecting the two housings constituting the portable electronic device are formed in both housings. Therefore, the length of the guide groove formed in each housing can be shortened compared to the case where the guide groove necessary for obtaining the required amount of rotation is formed only in one housing. As a result, the area of the guide groove (hole) existing on the surface of each housing is reduced, and a reduction in the rigidity of the housing is avoided. Furthermore, the guide groove formed in each housing does not intersect with other guide grooves. Therefore, there is no possibility that the shaft moving in the guide groove is caught by the corner of the guide groove or enters the unintended guide groove.

  In the present specification, an example of an embodiment of the present invention has been described by taking a mobile phone as an example, but the present invention is also applicable to a portable electronic device other than a mobile phone.

BRIEF DESCRIPTION OF THE DRAWINGS It is an external appearance perspective view which shows the mobile telephone which is an example of embodiment of this invention, Comprising: (a) is a closed state, (b) is a 1st open state, (c) shows a 2nd open state. It is a typical perspective view which shows the rear surface of an upper housing | casing. It is a typical top view which shows the front surface of a lower housing | casing. It is a schematic diagram which shows the connection state of an upper and lower housing | casing. It is a schematic diagram which shows the relative positional relationship of the 1st guide groove thru | or 4th guide groove in a closed state. It is a schematic diagram which shows the relative positional relationship of the 1st guide groove thru | or 4th guide groove in a 1st open state. It is a schematic diagram which shows the relative positional relationship of the 1st guide groove thru | or 4th guide groove in a 2nd open state. It is a schematic diagram which shows the positional relationship of the guide groove and shaft pin of the process which transfers to a 1st open state from a closed state. It is a schematic diagram which shows the positional relationship of the guide groove and shaft pin of the process which transfers to a 1st open state from a closed state. It is a schematic diagram which shows the positional relationship of the guide groove and shaft pin of the process which transfers to a 2nd open state from a 1st open state. It is a schematic diagram which shows the positional relationship of the guide groove and shaft pin of the process which transfers to a 2nd open state from a 1st open state. It is a typical side view which shows the rear surface of an upper housing | casing, and the front surface of a lower housing | casing. It is a schematic diagram which shows the rotation coupling mechanism currently disclosed by patent document 1. FIG. It is a schematic diagram which shows operation | movement of the rotation coupling mechanism currently disclosed by patent document 1 with time.

Explanation of symbols

10 upper housing 20 lower housing 31 first guide groove 32 a second guide groove 33 a third guide groove 34 fourth guide groove 41 first shaft pin 42 second shaft pin P ₁₁ first guide Start point of groove P ₁₂ Start point of second guide groove P ₁₃ Start point of third guide groove P ₁₄ Start point of fourth guide groove P ₂₁ End point of first guide groove P ₂₂ End point of second guide groove P ₂₃ End point of third guide groove P ₂₄ End point of fourth guide groove

Claims (7)

A first housing provided with a display on the surface;
A second housing having an operation portion on the surface;
A coupling mechanism for rotatably coupling the first casing and the second casing;
The first casing is overlapped with the second casing in a direction in which the back surface opposite to the front surface faces the surface of the second casing, and rotates on the second casing. Is possible,
At least a part of the back surface of the first housing and at least a part of the surface of the second housing are curved surfaces, and the first housing rotates on the second housing. When the curved surface provided on the back surface of the first housing slides on the curved surface provided on the surface of the second housing ,
The curved surface provided on the back surface of the first housing is a convex surface, and the curved surface provided on the surface of the second housing is a concave surface corresponding to the convex surface;
The connection mechanism is in a closed state in which the operation section of the second casing is covered by the first casing, the operation section is exposed, and the first casing and the second casing Any one of a first open state in which a center line intersects and a second open state in which the operation unit is exposed and a center line of the first casing matches the center line of the second casing. The first housing and the second housing are connected so that the state can be shifted from one state to another by a rotating operation.
The coupling mechanism is
A first guide groove and a second guide groove provided on the back surface of the first housing;
A third guide groove and a fourth guide groove provided on the surface of the second housing;
A first shaft passing through the first guide groove and the third guide groove;
A second shaft penetrating the second guide groove and the fourth guide groove,
The first guide groove and the second guide groove are in a line-symmetrical position with respect to the center line of the first casing as an axis of symmetry, and the first guide groove is the second guide groove The second guide groove is formed along an arc centered on the start point of the first guide groove, and the second guide groove is formed along an arc centered on the start point of the first guide groove.
The third guide groove and the fourth guide groove are in a line-symmetrical position with the center line of the first casing as an axis of symmetry in the first open state, and the third guide groove The guide groove is formed along an arc centered on the start point of the fourth guide groove, and the fourth guide groove is formed along an arc centered on the start point of the third guide groove. A portable electronic device characterized by that. In the closed state, the start point of the first guide groove coincides with the start point of the third guide groove, and the end point of the second guide groove coincides with the end point of the fourth guide groove. The first axis is located at the overlapping point of the start point of the first guide groove and the start point of the third guide groove, and the end point of the second guide groove and the end point of the fourth guide groove The second axis is located at the overlapping point of
In the first open state, the start point of the first guide groove coincides with the start point of the third guide groove, and the start point of the second guide groove and the start point of the fourth guide groove And the first axis is located at the overlapping point between the start point of the first guide groove and the start point of the third guide groove, and the start point of the second guide groove and the fourth guide groove The second axis is located at the overlapping point with the starting point of
In the second open state, the end point of the first guide groove coincides with the end point of the third guide groove, and the start point of the second guide groove and the start point of the fourth guide groove The first axis is located at the overlapping point between the end point of the first guide groove and the end point of the third guide groove, and the start point of the second guide groove and the fourth guide groove portable electronic device according to claim 1, characterized in that said second axis overlap point between the starting point of position. When shifting from the closed state to the first open state, the first casing and the second casing rotate about the first axis as a rotation axis, and the second axis is Move from the end point of the guide groove to the start point in the fourth guide groove,
When shifting from the first open state to the second open state, the first casing and the second casing rotate about the second axis as the rotation axis, and the first casing The portable electronic device according to claim 1 or 2 , wherein the shaft moves in the third guide groove from a start point to an end point of the guide groove. The first guide groove has an arc length that is a quarter of the circumference of a circle centered on the starting point of the second guide groove;
The second guide groove has an arc length that is a quarter of the circumference of a circle centered on the starting point of the first guide groove;
The third guide groove has an arc length that is a quarter of the circumference of a circle centered on the start point of the fourth guide groove;
The fourth guide groove, in any one of claims 1 to 3, characterized in that it has an arc length of one quarter of the circumference of a circle centered on the origin of the third guide groove The portable electronic device described. Wherein in the first open state, the short side of the first housing, of claims 1 to 4, characterized in that it is located outside the long side of the second housing Portable electronic device in any one. In the first opened state, the center of the provided in the first housing the display unit, any of claims 1 to 5, characterized in that on said second housing centerline A portable electronic device according to any one of the above. The center of the display unit provided in the first housing in the first open state is in a position shifted to the left or right of the center line of the second housing. The portable electronic device according to any one of claims 1 to 5 .

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