JP4653212B2 - Folding mobile phone - Google Patents

Description

  The present invention relates to a foldable mobile phone, and more particularly to a foldable mobile phone having a structure that is folded when being carried and opened when a call is made.

  Structurally, mobile phones are classified into a foldable mobile phone having a foldable structure and a so-called stick-type mobile phone having no foldable structure.

  Since the foldable mobile phone is considerably smaller in the folded state than the rod-type mobile phone, it is convenient to carry. However, in this folding type mobile phone, a folding operation and an opening operation that are not performed in a bar type mobile phone are performed every time a call is made. Therefore, it is desirable to improve the operability as a structure that can be easily folded and opened.

  1A and 1B show a cellular phone 10 having a structure that is automatically opened as an example of the prior art. The cellular phone 10 includes an operation key side casing 11, a display unit side casing 12, and a hinge 13 that couples both. The operation key side housing 11 includes an operation key 14 and a microphone 15. The display unit side body 12 includes a liquid crystal panel 16 serving as a display unit, an antenna 17, a speaker 18, and the like. A hinge module 19 and an oil damper 20 are incorporated in the hinge 13. A button 21 is provided near the hinge 13 on one side surface 11 a of the operation key side housing 11.

  Normally, as shown in FIG. 1A, the mobile phone 10 is in a closed state in which the display unit side body 12 is closed and coupled to the operation key side body 11 by the lock claw 22.

  When making a call, the user holds the foldable mobile phone 10 in a closed state with the operation key side housing 11 placed on the palm of the left hand 30 and grips it with the left hand 30, and presses the button with the thumb 31 of the gripped left hand 30. Press 21. When this operation is performed, the lock claw 22 is moved and retracted via the rotation lever 23, the lock on the display unit side body 12 is released, and the display unit side case 12 is operated by the spring 19a in the hinge module 19. As shown in FIG. 1 (B), the key-side casing 11 is rotated in the direction of arrow A and opened about 145 degrees. The operation of opening the display unit side body 12 by the oil damper 20 is performed slowly. In the opened state, the user extends the antenna 17 and makes a call by bringing the mobile phone 10 close to the face and placing the speaker 18 on the ear.

  After the call is completed, the user moves his hand to house the antenna 17 and rotates the display unit side body 12 in the closing direction indicated by the arrow B to the position shown in FIG. The body 12 is engaged with the lock claw 22 and closed.

  The lock of the folding cellular phone 10 in a closed state by the user is released by pressing the button 21 or by forcibly rotating the display unit side body 12 with respect to the operation key side body 11 slightly. Is done. The operation of pressing the button 21 is performed by pressing the button 21 with the thumb 31 of the left hand 30 holding the folding mobile phone 10. However, until the lock is released, the operation of forcibly turning the display unit side body 12 with respect to the operation key side body 11 cannot be performed unless both hands are used. For this reason, the operability of the mobile phone 10 was not sufficient.

  Therefore, an object of the present invention is to provide a foldable mobile phone that solves the above-described problems.

Disclosed technology includes a fixed casing, an end of the hinge of the fixed casing, in the folding type portable telephone having a supported movable side housing by the hinge, the fixed casing and the movable-side The surfaces facing each other are curved surfaces that are convex in the short-side direction, so that the fixed-side housing and the movable-side housing on the side surfaces on both sides are folded when the movable-side housing is folded. And a recess for prying the size of the user's fingertip.

  While holding the folded mobile phone folded with one hand, the user inserts the fingertip of this hand into the pitting recess between the fixed housing and the movable housing, so that the user can pry it open. By doing so, it is possible to rotate the movable housing in the opening direction. Therefore, the user can open the foldable mobile phone with only one hand, and the operability can be improved.

  The recesses for squeezing are formed without tapering the edge portions along the longitudinal direction of the movable housing and the stationary housing. Therefore, it is possible to form the recesses for prying without reducing the volumes of the movable housing and the stationary housing.

  When the movable housing and the stationary housing are curved so as to form a substantially circular arc in the open state, the movable housing and the stationary housing are folded along the outline of the portion of the user's face from the ear to the mouth and folded. The hits on the user's face of the mobile phone are dispersed and the hits are weakened. Therefore, even if a long-time call is made, the place where the foldable mobile phone hits on the user's face is less likely to turn red. Further, since the hit is weak, sweat or the like hardly enters the inside of the folding mobile phone from the place where the user's face hits the folding mobile phone.

  When the recess for pry-up is formed by bending the movable casing and the fixed casing to improve the usability, the edges of the movable casing and the fixed casing along the longitudinal direction thereof The portion is formed without tapering. Therefore, it is possible to form the recesses for prying without reducing the volumes of the movable housing and the stationary housing.

  In addition, when the lock mechanism is provided, the movable housing can be held in the closed position when a call is not made. Further, when the spring is provided, it is possible to automatically open the movable housing to the open state by releasing the lock mechanism when making a call.

  Next, the best mode for carrying out the invention will be described.

  2A, 2B and 3A, 3B, 3C, and 3D are structures that are automatically opened when the unlock button according to the first embodiment of the present invention is pressed. The foldable mobile phone 50 is shown. FIGS. 2A, 3A, and 3B show a folded state when being carried. FIG. 3C shows a state during an open call.

  The mobile phone 50 includes an operation key side casing 51 that is a fixed side casing, a display section side casing 52 that is a movable casing, and an operation key side casing 51 and a display section side casing that rotate relative to each other. And a hinge 53 connecting the body 52. X1 and X2 are axial directions of the hinge 53, Y1 and Y2 are longitudinal directions of the mobile phone 50, and Z1 and Z2 are thickness directions of the mobile phone 50. An arrow A is a direction in which the display unit side body 52 opens with respect to the operation key side body 51. An arrow B is a direction in which the display unit side body 52 is folded with respect to the operation key side body 51.

  The operation key side casing 51 includes an operation key 55, a microphone 56, a lock release button 57, and the like. As shown in FIG. 4, the operation key side housing 51 is a box made up of housing halves 60 and 61, and a printed circuit board module 64, a lock claw 62, a rotation lever 63, and the like are housed therein. A battery 65 is attached to the lower surface side of the operation key side casing 51.

  The display unit side body 52 includes a liquid crystal panel 70, an antenna 71, a speaker 72, and the like. As shown in FIG. 4, the display unit side case 52 is a box made up of case halves 73 and 74, and a printed circuit board module 75 and the like are accommodated therein. The printed circuit board module 64 and the printed circuit board module 75 are connected by a flexible cable 76. The flexible cable 76 forms a loop inside the hinge 53, and a spiral portion 76a is formed.

  A hinge module 80 and a damper module 82 are incorporated in the hinge 53. A torsion coil spring 81 is incorporated in the hinge module 80. The torsion coil spring 81 serves to open the display unit side body 52 and has a strong spring force.

  As shown in FIG. 5, the damper module 82 has a configuration in which an oil damper unit 90 and a one-way clutch unit 100 are coaxially coupled. Normally, as shown in FIGS. 2A and 3A, the cellular phone 50 is operated by a lock mechanism 66 that is enlarged and shown in FIG. It is in a closed state coupled to the key-side casing 51. The lock mechanism 66 has a configuration in which a recess 77 on the front end side of the display unit side body 52 is fitted to the lock claw 62.

  When making a call, the user holds the foldable mobile phone 50 closed with the operation key side casing 51 on the palm of the left hand 30 and grips it with the left hand 30 and locks it with the thumb 31 of the gripped left hand 30. Press the release button 57. When this operation is performed, the lock claw 62 is moved and retracted via the rotating lever 63, the lock on the display unit side body 52 is released, and the torsion coil spring 81 in the hinge module 80 releases the display unit side body 52. Is rotated in the direction of arrow A with respect to the operation key side casing 51, and is opened about 145 degrees as shown in FIG. 2 (B) and FIG. 3 (C). In the open state, the user extends the antenna 71 and brings the mobile phone 50 close to the face and puts the speaker 72 on the ear to make a call.

  After the call is completed, the user holds the antenna 71 with his hand and rotates the display unit side body 52 in the closing direction indicated by the arrow B to the position shown in FIGS. 2 (A) and 3 (A). The display unit side body 52 is locked by the lock mechanism 66 and closed. Next, the damper module 82 will be described.

  The oil damper unit 90 has a cylindrical housing 91 and an impeller shaft member 92 protruding from the housing 91 in the X1 direction. The housing 91 is filled with oil. When the housing 91 rotates with respect to the impeller shaft member 92, the oil is agitated and generates a viscous resistance force against the rotation of the housing 91.

  As shown in FIGS. 5 and 6A, the one-way clutch unit 100 includes a housing 101, a clutch coil spring 102 incorporated in the housing 101, and an inner side of the clutch coil spring 102. And a shaft member 103 with a flange incorporated therein. A washer 104 is attached to the opening of the housing 101 so that the shaft member 103 is not detached from the housing 101.

  The shaft member 103 is supported by fitting the convex portion 103a at the end in the X1 direction into the center hole 101b at the back of the housing 101, and the flange portion 103b at the end in the X2 direction is supported near the opening of the housing 101. It is rotatably supported at the center. The clutch coil spring 102 is closely wound and has an inner diameter D2 that is substantially the same as the diameter D1 of the shaft member 103. The clutch coil spring 102 has a fixing bent portion 102a at the end in the X1 direction, and a free end portion 102b at the end in the X2 direction. The winding direction of the clutch coil spring 102 is counterclockwise (A direction) from the fixing bent portion 102a toward the free end portion 102b when viewed in the arrow X1 direction. The clutch coil spring 102 is fixedly attached by fitting a bending portion 102 a for fixing to a hole 101 a in the back of the housing 101.

  As shown in FIG. 6A, the shaft member 103 and the clutch coil spring 102 are in contact with the peripheral surface of the shaft member 103 and the inner peripheral surface of the clutch coil spring 102, and the free end portion 102b is the shaft member. There is a relationship simply hitting the peripheral surface 103. That is, when the shaft member 103 is rotated by the frictional force μF between the peripheral surface of the shaft member 103 and the inner peripheral surface of the clutch coil spring 102, the clutch coil spring 102 is twisted.

  The one-way clutch unit 100 having the above-described configuration has a small number of parts, is simple in configuration, and can be configured with a small diameter, and thus is suitable for being incorporated into the hinge 53 of the mobile phone 50. Referring to FIG. 5, a prismatic impeller shaft member 92 is fitted in a square hole 103c of the shaft member 103, and the impeller shaft member 92 and the shaft member 103 are rotated together.

  The damper module 82 is incorporated in the hinge 53 in a state where the oil damper unit 90 is fixed to the display unit side body 52 and the one-way clutch unit 100 is fixed to the operation key side body 51. A cylindrical housing 91 of the oil damper unit 90 is fixed to the display unit side body 52. The housing 101 of the one-way clutch unit 100 is fixed to the operation key side casing 51.

  Next, operations when opening and folding the foldable mobile phone 50 will be described with particular attention to the operations of the hinge module 81 and the damper module 82.

  When the display unit side body 52 is rotated in the opening direction indicated by the arrow A by the torsion coil spring 81, the oil damper unit 90 is rotated in the arrow A direction, and the impeller shaft member 92 and the shaft member 103 are moved to the arrow A. Start rotating in the direction. However, as shown in FIG. 6B, when the shaft member 103 is rotated in the A direction, the clutch coil spring 102 is rotated in the A direction by being dragged by the frictional force μF, and the clutch is fixed at one end. The coil spring 102 is deformed in a direction in which the inner diameter D2 is reduced, and tightens the shaft member 103. Therefore, the rotation of the shaft member 103 is transmitted to the housing 101 via the clutch coil spring 102. That is, the one-way clutch unit 100 is in a connected state where the transmission paths are connected.

  Here, since the housing 101 is fixed to the operation key side casing 51, the rotation of the shaft member 103 is restrained. Therefore, the rotation of the impeller shaft member 92 is also restrained, and the oil damper unit 90 enters a state in which the housing 91 rotates while resisting the viscosity of the oil while the oil is stirred while the impeller shaft member 92 does not rotate. Thus, the damper function is exhibited.

  Therefore, the operation of opening the display unit side body 52 is performed slowly.

  When the telephone call is completed and the user rotates the display unit side body 52 with the hand in the closing direction indicated by the arrow B, the oil damper unit 90 rotates in the arrow B, and the impeller shaft member 92 is rotated. And the shaft member 103 starts to rotate in the arrow B. When the shaft member 103 is rotated in the B direction, the clutch coil spring 102 is rotated in the B direction by being dragged by the friction force μF, and the clutch coil spring 102 having one end fixed is expanded in the direction in which the inner diameter D2 is expanded. It deforms and becomes loose with respect to the shaft member 103. Therefore, the rotation of the shaft member 103 is not transmitted to the clutch coil spring 102, and the one-way clutch unit 100 is in a disconnected state in which the transmission path is cut off. The shaft member 103 can be freely rotated.

  Therefore, the oil damper unit 90 is in a state where the impeller shaft member 92 rotates together with the housing 91 and does not function as a damper.

  Therefore, the mobile phone 50 can be quickly folded quickly by rotating the display unit side body 52 in the closing direction indicated by the arrow B at a high speed. Further, the operation of rotating the display unit side body 52 in the closing direction indicated by the arrow B can be performed with a light force. Therefore, the mobile phone 50 has excellent operability.

  Next, the appearance of the mobile phone 50 will be described.

  As shown in FIGS. 3A and 2A, on the Y1-Y2 direction, the operation key side casing 51 has a substantially arc shape convex in the Z2 direction with a radius R1, and the display section side casing. 52 has a substantially arc shape convex in the Z1 direction with a radius R2. The radius R1 and the radius R2 are substantially equal. Therefore, as shown in FIGS. 3 (C) and 2 (B), the inner surface of the mobile phone 50 in an open state has a substantially arc shape with a radius of R3 in the longitudinal direction. It is curved.

  Further, as shown in FIG. 3D, the surface 110 on which the operation key 55 of the operation key side casing 51 is arranged in the X1-X2 direction is a curved surface convex in the Z1 direction having a radius R11. is there. The surface 111 on which the liquid crystal panel 70 of the display unit side body 52 is disposed is a curved surface convex in the Z2 direction with a radius of R12.

  In particular, as shown in FIGS. 3 (C) and 2 (B), the mobile phone 50 is curved in a substantially arc shape in an open state, and therefore, a portion of the user's face that extends from the ear to the mouth. The contact with the user's face of the mobile phone 50 is dispersed, the contact is weakened, and the feeling of use is improved. Due to the weak hit, the place where the foldable mobile phone hits in the user's face is less likely to turn red even if the user has been talking for a long time. In addition, since the hit is weak, it is difficult for sweat or the like to enter the inside of the mobile phone 50 from the location where the user's face hits the mobile phone. Moreover, since the outer surface of the mobile phone 50 is also curved, it fits in the palm of the hand and has a good feeling of use.

  By adopting a configuration that improves the usability as described above, the operation key side casing 51 and the display section side casing are provided on the side surface on the X2 direction side and the side surface on the X1 direction side when the cellular phone 50 is folded. 52 and the recesses 112 and 113 for squeezing are formed. The pitting recesses 112 and 113 have a dimension a in the Z1-Z2 direction on the entrance side of 8 ± 3 mm, that is, 5 to 11 mm, have a V-shape in the X1-X2 direction, and have a size that allows a fingertip to enter. is there.

  Next, a configuration and operation in which the folding mobile phone 50 is opened without pressing the lock release button 57 will be described.

  This configuration is constituted by the following two structures.

  <1> Configuration of the lock mechanism 66 described above.

  The lock claw 62 has a tapered portion 62 a at the tip and is biased by a spring 67. Therefore, the lock mechanism 66 is configured such that when a force in the opening direction is applied to the display unit side body 52, the lock claw 62 is pushed back by the inclined surface of the tapered portion 62a, and the lock is released.

  <2> A configuration in which there are the prying recesses 112 and 113 having a size for inserting a fingertip between the operation key side casing 51 and the display section side casing 52.

  When the foldable mobile phone 50 is opened without pressing the lock release button 57, as shown in FIGS. 2A and 3D, the user operates the foldable mobile phone 50 in a closed state. The key-side casing 51 is placed on the palm of the left hand 30 and is gripped by the left hand 30. Then, it is moved so as to pry between the operation key side casing 51 and the display section side casing 52. By this operation, the display unit side body 52 is urged in a direction away from the operation key side body 51, that is, in the direction of the arrow C, and is slightly forcibly rotated.

  The display unit side body 52 is rotated while forcibly retracting the lock claw 62, and the lock mechanism 66 is finally unlocked. Here, in the folded state as shown in FIG. 2 (A), the dimension a in the Z1-Z2 direction is large in the center portion on the Y1-Y2 direction on the entrance side of the pry-out recess 112, and the Y2 direction. It has a shape that gradually narrows as it shifts. The dimension “a” at the center is large enough to accommodate even a large thumb. Therefore, although there are individual differences in the size of the thumb 31 depending on the user, the thumb 31 is inserted into the entrance side of the recess 112 for prying at the center, and the thumb 31 is slid to the preferred position in the Y2 direction, and the thumb 31 is pry open at this position. By moving in this way, it is possible to pry between the operation key side casing 51 and the display unit side casing 52. That is, a user with a small thumb size and a user with a large thumb size can pry between the operation key side casing 51 and the display section side casing 52.

  When the display unit side body 52 is rotated until the lock mechanism 66 is unlocked, the display unit side body 52 is rotated in the direction of arrow A by the spring 81 in the hinge module 80 thereafter. The cellular phone 50 is in the open state shown in FIG. As described above, the operation of forcibly rotating the display unit side body 52 with respect to the operation key side body 51 until the lock is released can be performed with one hand without using both hands. Thus, the mobile phone 50 has excellent operability.

  FIGS. 7A and 7B show a foldable mobile phone 50A having a structure that is automatically opened when a lock release button according to a second embodiment of the present invention is pressed. FIG. 8 shows the internal structure of the hinge 53A. Since the mobile phone 50A has substantially the same configuration as the mobile phone 50 of FIGS. 2 and 3 except for the locking mechanism and the recess for prying, the corresponding parts are denoted by the same reference numerals with the suffix A. The description is omitted.

  The cellular phone 50A includes an operation key side casing 51A, a display unit side casing 52A, and a hinge 53A that couples the operation key side casing 51A and the display unit side casing 52A so as to rotate with respect to each other. A damper module 82A is incorporated in the hinge 53A. As shown in FIG. 8, the hinge module 80 </ b> A has a lock mechanism 120. The lock mechanism 120 includes a shaft member 121 fixed to the operation key side casing 51A and a cam member 122 fixed to the display unit side casing 52A. The trapezoidal lock claw 122a of the cam member 122 is in a locked state with the recess 121a of the shaft member 121 being fitted. The lock mechanism 120 is provided inside the hinge 53A.

  When the lock release button 57A is pushed in the state of FIG. 7A, the push pin 123 pushes the cam member 122 against the spring 124 in the X1 direction, the lock claw 122a comes out of the recess 121a, and the lock is released. Canceled.

  Arc-shaped concave surfaces 130 and 131 are formed at both ends in the X1-X2 direction of the surface 110A of the operation key side casing 51A. Arc-shaped concave surfaces 132 and 133 are formed at both ends in the X1-X2 direction of the surface 111A of the display unit side body 52A. In the folded state shown in FIG. 7 (A), recesses 112A and 113A for prying are formed between the operation key side casing 51A and the display section side casing 52A. The pitting recesses 112A and 113A have a dimension aA in the Z1-Z2 direction on the entrance side of 5 to 11 mm and are large enough to fit a fingertip, and have a U-shape in the X1-X2 direction.

  As shown in FIG. 7A, the folding cellular phone 50A closed by the user is gripped by the left hand 30 with the operation key side casing 51A placed on the palm of the left hand 30, and the thumb of the left hand 30 gripping the grip. The fingertips 31 are inserted into the prying recess 112A, and the fingertips of the index finger 32 and the middle finger 33 are inserted into the pegging recess 113A, and moved so as to pry between the operation key side casing 51A and the display side casing 52A. By this operation, the display unit side body 52A is urged in a direction away from the operation key side body 51A and is slightly forcibly rotated. At this time, the trapezoidal lock claw 122a is guided by the edge of the recess 121a along the slope, and is forced out of the recess 121a, and the lock is released. Thereafter, the display unit side body 52A is rotated in the direction of arrow A by the spring 81A in the hinge module 80A, and the mobile phone 50A is in the open state shown in FIG.

  FIG. 9A shows a folding mobile phone 50B according to a third embodiment of the invention. FIG. 9B is a cross section taken along line BB in FIG.

  The cellular phone 50B includes an operation key side casing 51B, a display unit side casing 52B, and a hinge 53B that connects the operation key side casing 51B and the display unit side casing 52B so as to rotate with respect to each other.

  Further, as shown in FIG. 9B, the surface 110B on which the operation keys of the operation key side housing 51B are arranged in the X1-X2 direction is a curved surface convex in the Z1 direction having a radius R21. . The surface 111B on which the liquid crystal panel of the display unit side body 52B is disposed is a curved surface convex in the Z2 direction with a radius of R22. Since the surfaces 110B and 111B are curved surfaces in this way, in the folded state, the side surface on the X2 direction side and the side surface on the X1 direction side are provided between the operation key side casing 51B and the display unit side casing 52B. In addition, recesses 112B and 113B for prying off are formed. The recesses 112B and 113B for pry-off have a dimension aB in the Z1-Z2 direction on the inlet side of 5 to 11 mm, a depth of 5 mm or more, and a size that allows fingertips to enter, and are V-shaped in the X1-X2 direction. Have

  Similarly to the above, the display unit side body 52B is urged in a direction away from the operation key side body 51B by using the prying recesses 112B and 113B, and is slightly forcibly rotated.

  The foldable mobile phone of the invention is not limited to the above embodiment, and may be configured to be manually opened. Further, the pruning recess for piling at the tip of the finger can be formed by forming a slope or an arc surface on only one of the display unit side casing and the operation key side casing. In addition, the oil damper module can be configured such that the oil damper unit is fixed to the operation key side casing and the one-way clutch unit is fixed to the display section side casing. Alternatively, the independent oil damper unit and the one-way clutch unit may be assembled separately, and in this state, the oil damper unit and the one-way clutch unit may be connected.

It is a figure which shows the conventional folding type mobile phone. It is a figure which shows the folding type mobile telephone which becomes 1st Example of this invention. It is a figure which shows the foldable mobile telephone of FIG. FIG. 3 is an exploded perspective view of the folding mobile phone of FIG. 2. It is a figure which shows a damper module. It is a figure which shows operation | movement of a one-way clutch unit. It is a figure which shows the folding type mobile telephone which becomes 2nd Example of this invention. It is a figure which shows the structure of the hinge of the mobile telephone of FIG. It is a figure which shows the folding type mobile telephone which becomes 3rd Example of this invention.

Explanation of symbols

50, 50A, 50B Folding type mobile phone 51 Operation key side casing 52 Display section side casing 53 Hinge 66 Lock mechanism 82 Damper module 90 Oil damper unit 100 One-way clutch unit 101 Housing 102 Clutch coil spring 103 Shaft member with flange 112, 113 Recessed recess

Claims (4)

In a foldable mobile phone having a fixed housing, a hinge at the end of the fixed housing, and a movable housing supported by the hinge,
When the surfaces of the fixed-side housing and the movable-side housing face each other are curved surfaces that are convex in the short-side direction, the fixing of the side surfaces on both sides in a state where the movable-side housing is folded is performed. A foldable mobile phone comprising a recess for prying that is large enough to receive a fingertip of a user's hand between a side case and the movable side case. In a foldable mobile phone having a fixed housing, a hinge at the end of the fixed housing, and a movable housing supported by the hinge,
The facing surfaces of the fixed housing and the movable housing are curved surfaces that are convex in the short direction, and either the movable housing or the fixed housing is a substantially arc. Thus, in the folded state of the movable housing, a recess for squeezing is formed between the fixed housing on both side surfaces and the movable housing so that a fingertip of a user's hand can enter. A foldable mobile phone characterized by having a configuration as described above. In a foldable mobile phone having a fixed housing, a hinge at the end of the fixed housing, and a movable housing supported by the hinge,
The facing surfaces of the fixed-side housing and the movable-side housing are curved surfaces that are convex in the short-side direction, and the movable-side housing and the fixed-side housing are substantially arcuate in an open state. In the folded state, the bending of the movable housing itself and the bending of the fixed housing itself are between the movable housing and the fixed housing. According to the present invention, a folding mobile phone is characterized in that a recess for squeezing the finger into the user's hand is formed. In a foldable mobile phone having a fixed housing, a hinge at the end of the fixed housing, and a movable housing supported by the hinge,
The facing surfaces of the fixed-side housing and the movable-side housing are curved surfaces that are convex in the short-side direction, and the movable-side housing and the fixed-side housing are substantially arcuate in an open state. In the folded state, the bending of the movable housing itself and the bending of the fixed housing itself are between the movable housing and the fixed housing. Is formed so that the fingertip of the user's hand can be inserted and the movable-side housing is folded with respect to the stationary-side housing in a state in which the lock is released when the recess is removed. A foldable mobile phone comprising: a lock mechanism that locks in a closed state; and a spring that biases the movable housing in the opening direction.

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