JP6090760B1 - Portable information terminal - Google Patents

Abstract

An object of the present invention is to provide a portable information terminal having a stand opening mechanism that can prevent the stand from being opened due to a malfunction of the stand. A tablet terminal includes a panel-shaped casing, a plate-shaped stand portion that is pivotally connected to the casing and can be opened and closed with respect to the casing, and the casing is moved in an in-plane direction. After moving from the bottom to the bottom, an impact detection unit 8 that detects an impact generated in the housing, a movement detection unit 9 that detects a predetermined tilt of the housing, and a predetermined time after the impact is detected by the impact detection unit 8 A determination unit 10 that determines whether or not a predetermined inclination is detected by the movement detection unit 9, and when the determination unit 10 determines that the predetermined inclination is detected by the movement detection unit 9 within a predetermined time. And a control unit 7 for opening the closed stand unit. [Selection] Figure 2

Description

  The present invention relates to a portable information terminal.

  A portable information terminal such as a tablet terminal (tablet computer) or a smartphone is provided with a touch panel in a housing in which a circuit board such as a CPU or a memory is incorporated, and the user can input to the terminal by touching the screen. is there. As a method of using a tablet terminal, the user may view the contents of the display or perform input while holding it by hand, but the tablet terminal must be placed on a surface such as a desk or table. Sometimes used.

  The following Patent Document 1 is an invention relating to an electronic device case that can also be used as a stand, and the electronic device may fall back or fall even when used on a knee or the like with the electronic device standing. A technique for preventing this from happening is disclosed.

JP2013-25420A

  In order to stand the tablet terminal, a plate-like stand that can be opened and closed may be provided on the back side of the casing of the tablet terminal. The stand has, for example, a structure that can be rotated around a hinge, and the tablet terminal can be made independent by opening the stand. On the other hand, by closing the stand, the stand is accommodated on the back side of the housing, and can be handled as a panel-like terminal having no protrusion.

  The stand provided in advance in the tablet terminal can be configured to be manually opened or closed, and can be configured to automatically open upon detection of being placed on a mounting surface such as a desk or table. . When the stand has a configuration that automatically opens like the latter, when it is mistakenly detected that it is placed on the mounting surface and is housed in a bag, etc., when it is not necessary to open the stand, The stand may be opened automatically.

  This invention is made in view of such a situation, Comprising: In the portable information terminal which has an opening mechanism of a stand, providing the portable information terminal which can prevent the opening | release by malfunction of a stand is provided. Objective.

  The portable information terminal according to the first aspect of the present invention includes a panel-shaped housing, a stand that is pivotally connected to the housing and can be opened and closed with respect to the housing, and the housing is a surface. After moving inward from top to bottom, an impact detection unit that detects an impact generated in the housing, an inclination detection unit that detects a predetermined tilt of the housing, and the impact detection unit detects the impact. A determination unit that determines whether or not the predetermined inclination is detected by the inclination detection unit within a predetermined time, and in the determination unit, the predetermined inclination is detected by the inclination detection unit within the predetermined time. And a control unit that opens the closed stand unit when it is determined that it has been detected.

  A portable information terminal according to a second aspect of the present invention is provided with a panel-shaped casing, a stand that is pivotally connected to the casing and can be opened and closed with respect to the casing, and the casing. A proximity detection unit that detects proximity or contact of a dielectric to the housing, and an impact detection unit that detects an impact generated in the housing after the housing moves in an in-plane direction from top to bottom. And a control unit that opens the closed stand unit when the proximity detection unit detects the proximity or the contact and the impact detection unit detects the impact.

  A portable information terminal according to a third aspect of the present invention includes a panel-shaped housing, a stand that is pivotally connected to the housing and can be opened and closed with respect to the housing, and the housing is attachable / detachable. A possible keyboard unit, a tilt detection unit that detects a predetermined tilt of the casing, a connection detection unit that detects a connection between the casing and the keyboard unit, and a movement detection unit that detects movement in the keyboard unit The connection detection unit detects the connection between the housing and the keyboard unit, the tilt detection unit detects the predetermined tilt, and the movement detection unit detects the stationary state of the keyboard unit. And a control unit that opens the closed stand unit.

  According to the present invention, in a portable information terminal having a stand opening mechanism, it is possible to prevent the stand from being opened due to a malfunction.

It is a perspective view which shows the tablet terminal which concerns on 1st Embodiment of this invention. It is a block diagram which shows the tablet terminal which concerns on 1st Embodiment of this invention. It is a flowchart which shows operation | movement of the tablet terminal which concerns on 1st Embodiment of this invention. It is a perspective view which shows the tablet terminal which concerns on 2nd Embodiment of this invention. It is a block diagram which shows the tablet terminal which concerns on 2nd Embodiment of this invention. It is a flowchart which shows operation | movement of the tablet terminal which concerns on 2nd Embodiment of this invention. It is a front view which shows the one-way hinge mechanism of the tablet terminal concerning the 1st and 2nd embodiment of this invention, and the automatic opening | release mechanism of a stand. It is a partial expanded longitudinal cross-sectional view which shows the tablet terminal which concerns on 1st and 2nd embodiment of this invention. It is a longitudinal section showing a tablet terminal concerning the 1st and 2nd embodiments of the present invention. It is a longitudinal section showing a tablet terminal concerning the 1st and 2nd embodiments of the present invention. It is a front view which shows the one-way hinge mechanism of the tablet terminal which concerns on 1st and 2nd embodiment of this invention. It is a front view which shows the one-way hinge mechanism of the tablet terminal which concerns on 1st and 2nd embodiment of this invention. It is a front view which shows the one-way hinge mechanism of the tablet terminal which concerns on 1st and 2nd embodiment of this invention. It is a longitudinal section showing a tablet terminal concerning the 1st and 2nd embodiments of the present invention. It is a longitudinal section showing a tablet terminal concerning the 1st and 2nd embodiments of the present invention. It is a front view which shows the one-way hinge mechanism of the tablet terminal which concerns on 1st and 2nd embodiment of this invention. It is a front view which shows the one-way hinge mechanism of the tablet terminal which concerns on 1st and 2nd embodiment of this invention. It is a front view which shows the one-way hinge mechanism of the tablet terminal which concerns on 1st and 2nd embodiment of this invention. It is a longitudinal cross-sectional view which shows the automatic opening mechanism of the stand of the tablet terminal which concerns on 1st and 2nd embodiment of this invention. It is a front view which shows the automatic opening mechanism of the stand of the tablet terminal which concerns on 1st and 2nd embodiment of this invention. It is a cross-sectional view showing the automatic opening mechanism of the stand of the tablet terminal according to the first and second embodiments of the present invention. It is a longitudinal cross-sectional view which shows the automatic opening mechanism of the stand of the tablet terminal which concerns on 1st and 2nd embodiment of this invention. It is a front view which shows the automatic opening mechanism of the stand of the tablet terminal which concerns on 1st and 2nd embodiment of this invention. It is a cross-sectional view showing the automatic opening mechanism of the stand of the tablet terminal according to the first and second embodiments of the present invention. It is a longitudinal cross-sectional view which shows the automatic opening mechanism of the stand of the tablet terminal which concerns on 1st and 2nd embodiment of this invention. It is a front view which shows the one-way hinge mechanism of the tablet terminal concerning the 1st and 2nd embodiment of this invention, and the automatic opening | release mechanism of a stand. It is a cross-sectional view showing the automatic opening mechanism of the stand of the tablet terminal according to the first and second embodiments of the present invention.

[First Embodiment]
Hereinafter, tablet terminal 1 concerning a 1st embodiment of the present invention is explained using a drawing.
The tablet terminal 1 is an example of a portable information terminal, and includes a panel-shaped housing 2 and a display module provided in the housing 2 as shown in FIG. The housing 2 accommodates a circuit board on which a CPU and a memory are mounted, a power supply unit such as a battery, and the like. The tablet terminal 1 includes a control unit 7 realized by the above-described CPU or the like.

  The display module provided in the housing 2 includes, for example, a liquid crystal display and displays an image on the liquid crystal display. Note that the display module for displaying an image is not limited to the case where a liquid crystal display is provided, and may be an organic EL display or the like. The display module includes a touch panel and can detect an external contact such as a finger touched on the display surface and perform input.

  As shown in FIG. 1, the casing 2 of the tablet terminal 1 is provided with a plate-like stand 3 that can be opened and closed on the back side. The stand 3 has, for example, a structure that can rotate around the hinge 4, and the tablet terminal 1 can be made independent by opening the stand 3. On the other hand, by closing the stand 3, the stand 3 is accommodated on the back side of the housing 2, and can be handled as a panel-shaped terminal having no protrusion.

  The tablet terminal 1 further includes a proximity sensor 5, an acceleration sensor 6, and a control unit 7.

  The proximity sensor 5 is built in, for example, in the vicinity of the upper end of the housing 2. The proximity sensor 5 detects that an object (dielectric) is close to or in contact with the vicinity of the upper end of the housing 2. The proximity sensor 5 transmits the detection result to the control unit 7. As the proximity sensor 5, a generally used sensor such as an inductive type or a capacitance type can be applied. The proximity sensor 5 may be built in the vicinity of the side end of the housing 2. In this case, it can be detected that the object (dielectric) is close to or in contact with the side end of the housing 2.

  The detection result by the proximity sensor 5 is based on the situation where the housing 2 is touched by the user such as being held by the user and the case where the housing 2 is not touched by the user such as being housed in a bag. It is used as a condition for distinguishing between.

  The acceleration sensor 6 is installed inside the housing 2. The acceleration sensor 6 detects acceleration generated in the housing 2. As shown in FIG. 1, when the horizontal direction in the display surface of the housing 2 is the X axis, the vertical direction in the display surface is the Y axis, and the vertical direction with respect to the display surface is the Z axis, the acceleration sensor 6 is At least accelerations in the Y-axis direction and the Z-axis direction are detected. The acceleration sensor 6 transmits a signal related to the detected acceleration to the control unit 7.

  As illustrated in FIG. 2, the control unit 7 includes an impact detection unit 8, a movement detection unit 9, a determination unit 10, a lock control unit 11, and the like.

  The impact detection unit 8 detects an impact generated in the housing 2 after the housing 2 moves in the in-plane direction from top to bottom based on the acceleration in the Y-axis direction detected by the acceleration sensor 6. For example, the impact detection unit 8 can calculate a change in speed to detect that an impact has occurred in the housing 2 or an impact force that has occurred based on the detected acceleration. The detection result obtained by the impact detection unit 8 is sent from the impact detection unit 8 to the determination unit 10. The detection result obtained by the impact detection unit 8 is placed on a placement surface such as a situation where the housing 2 is placed on a placement surface such as a table or a desk, and a user holding it while walking, for example. It is used as a condition to distinguish the situation that is not.

  The movement detection unit 9 detects movement in the direction perpendicular to the in-plane direction of the display surface of the housing 2 based on the acceleration in the Z-axis direction detected by the acceleration sensor 6. For example, the movement detection unit 9 can detect the movement amount and the movement direction of the housing 2 based on the detected acceleration. The detection result obtained by the movement detection unit 9 is sent from the movement detection unit 9 to the determination unit 10. The detection result obtained by the movement detection unit 9 is used by a user such as being placed on a placement surface such as a table and then tilted at an angle that is easy for the user to view, or simply placed on the placement surface. It is used as a condition for distinguishing from situations that have not yet been reached.

  Based on the detection result obtained by the proximity sensor 5, the determination unit 10 determines whether or not an object (dielectric) approaches or contacts the housing 2. Further, the determination unit 10 moves the housing 2 in the Y-axis direction after the housing 2 moves from the top to the bottom in the in-plane direction of the housing 2 based on the detection result obtained by the impact detection unit 8. It is determined whether or not a predetermined impact or more has occurred. Further, the determination unit 10 determines whether or not the housing 2 is tilted by a predetermined angle or more based on the predetermined angle recorded in advance and the movement amount and movement direction detected by the movement detection unit 9. The inclination detected by the determination unit 10 is the rotation of the housing 2 around the X axis.

  The determination unit 10 detects that an object (dielectric material) is close to or in contact with the housing 2, and within a predetermined time after an impact in the Y-axis direction is generated on the housing 2, the housing is more than a predetermined angle. When it is determined that it is tilted, a signal related to unlocking is transmitted to the lock control unit 11. In other cases, for example, when no proximity (contact) of an object (dielectric material) to the housing 2 occurs, or when no impact in the Y-axis direction occurs on the housing 2, the housing 2 is not tilted. In this case, or when the housing 2 is tilted after a predetermined time, the determination unit 10 does not transmit a signal related to unlocking to the lock control unit 11.

  Based on the signal related to unlocking received from the determination unit 10, the lock control unit 11 unlocks the lock mechanism 13 that fixes the stand 3. As a result, an object (dielectric material) approaches or comes into contact with the housing 2, and the housing is tilted by a predetermined angle or more within a predetermined time after an impact in the Y-axis direction occurs on the housing 2. If this happens, the closed stand 3 is opened.

  The lock mechanism 13 has a structure for mechanically coupling and releasing the housing 2 and the stand 3. The structure of the lock mechanism 13 can be a commonly used one. The lock mechanism 13 releases the coupling between the mechanically coupled housing 2 and the stand 3 based on the signal related to unlocking transmitted from the lock control unit 11. The lock mechanism 13 may be a motor. The motor starts operation based on the signal related to unlocking transmitted from the lock control unit 11 and opens the stand 3. When the motor does not operate with the stand 3 closed or opened, the stand 3 is fixed (locked) to the housing 2.

Next, the operation of the tablet terminal 1 according to the present embodiment will be described with reference to FIG.
First, the proximity sensor 5 detects whether or not an object (dielectric material) is in proximity or in contact (step S1). When proximity or contact by an object (dielectric material) is not detected, there is a possibility that the case 2 is not touched by the user such as being housed in a bag. In the sensor 5, it is detected whether or not an object (dielectric) is in proximity or in contact.

  When proximity or contact by an object (dielectric material) is detected, the housing 2 moves in the in-plane direction from top to bottom based on the acceleration in the Y-axis direction detected by the acceleration sensor 6 in the impact detection unit 8. After that, it is detected whether or not a predetermined impact or more in the Y-axis direction has occurred on the housing 2 (step S2). If there is no impact in the Y-axis direction beyond the predetermined amount on the housing 2, there is a possibility that it is not placed on the placement surface, for example, the user is holding it while walking, so the proximity sensor In step 5, the process returns to the step (S1) of detecting whether or not the object (dielectric) is in proximity or in contact.

  When it is detected that a predetermined impact or more in the Y-axis direction has occurred on the housing 2, it is determined whether or not the housing 2 is tilted by a predetermined angle or more (step S3). Further, it is determined whether or not a predetermined time after the impact has occurred (step S4), and when the housing 2 is tilted by a predetermined angle or more within the predetermined time, a signal related to unlocking is determined by the determination unit 10. Is transmitted to the lock control unit 11, and the lock control unit 11 releases the lock of the lock mechanism 13 that fixes the stand 3 (step S5).

  On the other hand, if the housing 2 is not tilted more than a predetermined angle within a predetermined time, there is a possibility that it is not reached until it is used by the user such as simply being placed on the mounting surface. In the proximity sensor 5, the process returns to the step (S1) for detecting whether or not the object (dielectric) is in proximity or in contact.

  It is determined that an object (dielectric material) is approaching or contacting the housing 2 and the housing is tilted more than a predetermined angle within a predetermined time after an impact in the Y-axis direction occurs on the housing 2. In such a case, the case 2 is touched by the user, such as the case 2 being gripped by the user, the case where the case 2 is placed on the placement surface, and the situation where the case 2 is tilted at an angle that is easy to see It is thought that. Therefore, in the present embodiment, the proximity (contact) of the object (dielectric material) to the casing 2 has occurred, and the casing has a predetermined angle within a predetermined time after the impact in the Y-axis direction has occurred on the casing 2. When it is determined that the tilt is made as described above, the lock mechanism 13 fixing the stand 3 is unlocked. As a result, the closed stand 3 is opened.

  In the above-described embodiment, the impact detection unit 8 detects the impact generated in the housing 2 based on the acceleration in the Y-axis direction detected by the acceleration sensor 6, but two or more of the XYZ-axis directions are used. An impact generated in the housing 2 may be detected based on the acceleration in the direction.

  In the above-described embodiment, when the movement detection unit 9 detects a movement in a direction perpendicular to the in-plane direction of the display surface of the housing 2 based on the acceleration in the Z-axis direction detected by the acceleration sensor 6. However, the present invention is not limited to this example. The movement detection unit 9 is an example of an inclination detection unit according to the present invention, and an inclination detection unit that detects a predetermined inclination of the housing 2 may be provided instead of the movement detection unit 9. For example, the housing 2 is further provided with a gyro sensor, and based on the angular velocity detected by the gyro sensor, the tilt detector detects a predetermined tilt of the housing 2, for example, the in-plane direction of the display surface of the housing 2. Thus, vertical movement may be detected. A plurality of acceleration sensors may be provided, and the inclination of the housing 2 may be detected by combining the detection values of the acceleration sensors.

  Furthermore, in the above-described embodiment, the proximity or contact detected by the proximity sensor 5, the impact detected by the impact detection unit 8, the amount of movement detected by the movement detection unit 9, and the inclination of a predetermined angle or more based on the movement direction. The lock mechanism 13 is unlocked when all three conditions are satisfied, but the present invention is not limited to this example. The lock mechanism 13 may be unlocked when at least two of these three conditions are satisfied.

  For example, using two conditions of an impact detected by the impact detection unit 8 and an inclination greater than a predetermined angle based on the movement amount and the movement direction detected by the movement detection unit 9, a predetermined time after the impact occurs In addition, the closed stand 3 may be opened when it is determined that the inclination of the casing 2 of a predetermined angle or more has been detected. In this case, it is unclear whether or not the user is approaching or touching the housing 2 such as being held by the user, but is placed on a placement surface such as a table and is easy for the user to use. The stand 3 is opened with the case 2 as a trigger until the housing 2 is tilted.

  Further, using the two conditions of proximity or contact detected by the proximity sensor 5 and impact detected by the impact detection unit 8, proximity or contact is detected by the proximity sensor 5, and impact is detected by the impact detection unit 8. When is detected, the closed stand 3 may be opened. In this case, it is unclear whether it is tilted at an angle that is easy for the user to view after being placed on a placement surface such as a table, but the table 2 is still held by the user. The stand 3 is opened with the fact that it has been placed on the placement surface of as a trigger.

[Second Embodiment]
Next, the portable information terminal 15 according to the second embodiment of the present invention will be described.
The portable information terminal 15 is different from the tablet terminal 1 as shown in FIG. 4 in addition to the tablet terminal 1 having the housing 2 provided with the stand 3 (see FIG. 1) of the first embodiment described above. A housing keyboard 16 is provided. The tablet terminal 1 can be removed from or connected to the keyboard 16. That is, the tablet terminal 1 can be used alone, or can be connected to the keyboard 16 and input from the keyboard 16.

The control unit 7 of the tablet terminal 1 further includes a connection detection unit 17 as shown in FIG.
The connection detection unit 17 detects the connection status between the tablet terminal 1 and the keyboard 16. The detection result obtained by the connection detection unit 17 is sent from the connection detection unit 17 to the determination unit 10. The detection result obtained by the connection detection unit 17 is used as a condition for distinguishing between a situation where the tablet terminal 1 is connected to the keyboard 16 and a situation where it is not connected.

  The keyboard 16 incorporates an acceleration sensor 18. The acceleration sensor 18 detects acceleration generated in the keyboard 16. The acceleration sensor 18 transmits a signal related to the detected acceleration to the control unit 7 of the tablet terminal 1.

  Similar to the first embodiment, the movement detection unit 9 of the control unit 7 is based on the in-plane direction of the display surface of the housing 2 based on the acceleration in the Z-axis direction detected by the acceleration sensor 6 of the tablet terminal 1. Detects movement in the vertical direction with respect to. In the present embodiment, the movement detection unit 9 further detects the movement or stationary state of the keyboard 16 based on the acceleration detected by the acceleration sensor 18 of the keyboard 16. These two detection results indicate that the housing 2 is opened and closed with respect to the keyboard 16 when the keyboard 16 is placed on the placement surface, and the keyboard 16 when the keyboard 16 is not placed on the placement surface. It is used as a condition for distinguishing between the two open / close states.

  The determination unit 10 determines whether the tablet terminal 1 is connected to the keyboard 16 based on the detection result obtained by the connection detection unit 17. Further, the determination unit 10 determines whether or not the housing 2 is opened with respect to the keyboard 16 based on the detection result obtained by the movement detection unit 9.

  When the determination unit 10 determines that the tablet terminal 1 is connected to the keyboard 16, the keyboard 16 is stationary, and the housing 2 is opened with respect to the keyboard 16, the lock control unit 11 relates to unlocking. Send a signal. In other cases, for example, when the tablet terminal 1 is not connected to the keyboard 16, when the keyboard 16 is not placed on the placement surface and is moving, or when the keyboard 16 is placed on the placement surface. If it is not open, the determination unit 10 does not transmit a signal related to unlocking to the lock control unit 11.

  Based on the signal related to unlocking received from the determination unit 10, the lock control unit 11 unlocks the lock mechanism 13 that fixes the stand 3. As a result, when the tablet terminal 1 is connected to the keyboard 16 and the keyboard 16 is stationary and the housing 2 is opened with respect to the keyboard 16, the closed stand 3 is opened.

Next, the operation of the portable information terminal 15 according to the present embodiment will be described with reference to FIG.
First, the connection detection unit 17 detects whether or not the tablet terminal 1 is connected to the keyboard 16 (step S11). When the tablet terminal 1 is not connected to the keyboard 16, for example, there is a possibility that the tablet terminal 1 is not placed on a placement surface such as being held by a user while walking. The process returns to the step of detecting whether or not the terminal 1 is connected to the keyboard 16 (S11).

  When it is detected that the tablet terminal 1 is connected to the keyboard 16, it is determined whether or not the keyboard 16 is kept stationary (step S12). Even when the keyboard 16 is not maintained in a stationary state, there is a possibility that the keyboard 16 is not placed on a placement surface such as being held by a user while walking. The process returns to the step of detecting whether 1 is connected to the keyboard 16 (S11).

  When it is detected that the keyboard 16 is kept stationary, it is detected whether or not the housing 2 is opened with respect to the keyboard 16 (step S13). When it is detected that the housing 2 is opened with respect to the keyboard 16, a signal related to unlocking is transmitted from the determination unit 10 to the lock control unit 11, and the lock control unit 11 locks the stand 3. The lock of the mechanism 13 is released (step S14).

  On the other hand, if the housing 2 is not opened with respect to the keyboard 16, it may be in a situation where it has not been used by the user such as simply being placed on the mounting surface. The detection unit 17 returns to the step of detecting whether the tablet terminal 1 is connected to the keyboard 16 (S11).

  When it is determined that the tablet terminal 1 is connected to the keyboard 16, the keyboard 16 is stationary, and the housing 2 is opened with respect to the keyboard 16, the housing 2 is placed on the placement surface. It is considered that the user is about to start use. Therefore, in this embodiment, when it is determined that the tablet terminal 1 is connected to the keyboard 16, the keyboard 16 is stationary, and the housing 2 is opened with respect to the keyboard 16, the lock that fixes the stand 3. The mechanism 13 is unlocked. As a result, the closed stand 3 is opened.

[One-way hinge mechanism]
Next, the one-way hinge mechanism 20 applicable to the tablet terminal 1 according to the first and second embodiments of the present invention will be described.
The one-way hinge mechanism 20 fixes the housing 2 at an arbitrary angle with respect to the stand 3 and maintains the state in which the housing 2 stands up. Further, the one-way hinge mechanism 20 is configured such that when a force is applied in a direction in which the angle between the stand 3 and the housing 2 is reduced from the state in which the housing 2 stands, that is, when the housing 2 is pressed, Therefore, when a force is applied in a direction in which the angle between the stand 3 and the housing 2 is increased from the state in which the housing 2 stands up, that is, when the housing 2 is pulled, no torque is applied.

  As shown in FIG. 7, the one-way hinge mechanism 20 includes a torsion spring 21, a first bracket 22, a second bracket 23, a first fitting portion 24, a second fitting portion 25, and a compression spring 26. The torque hinge 27 and the third bracket 28 are provided.

  The first bracket 22 has a fixed portion 29 fixed to the stand 3 and a shaft portion 30 provided in the X-axis direction of the housing 2. The fixed portion 29, the shaft portion 30, and the first fitting portion 24 are integrally coupled, and the first fitting portion 24 does not idle with respect to the first bracket 22. The third bracket 28 has a fixed portion 31 fixed to the housing 2 and a shaft portion 32 provided in the X-axis direction of the housing 2. The fixed portion 31, the shaft portion 32, and the torque hinge 27 are integrally coupled, and the torque hinge 27 does not idle with respect to the third bracket 28.

  The shaft portion 30 of the first bracket 22 is rotatably supported by the second bracket 23. The second bracket 23 is fixed to the housing 2. The torsion spring 21 has one end portion in contact with the stand 3 side and the other end portion in contact with the housing 2 side. The compression spring 26 has one end in contact with the second fitting portion 25 and the other end in contact with the torque hinge 27.

  First, a case where the casing 2 and the stand 3 operate in directions away from each other will be described. The case where the casing 2 and the stand 3 operate in directions away from each other is as follows: (1) When the casing 2 and the stand 3 are unlocked and the stand is opened as shown in FIG. As shown in FIG. 10, the stand 3 is placed on the placement surface and sometimes raises the housing 2. In either case, the same behavior is taken.

  First, the fixing of the casing 2 and the stand 3 is released (in the case (1)), or the stand 3 is placed on the placement surface and the casing 2 is raised (in the case (2)). . At this time, as shown in FIG. 11, a force is applied to the stand 3 in the direction in which the stand 3 is opened by the spring force of the torsion spring 21 (by the force applied by the weight of the stand 3 depending on the angle of the stand 3). To do. At that time, the shaft portion 30 and the first fitting portion 24 of the first bracket 22 rotate integrally.

  As a result, as shown in FIG. 12, the projection of the first fitting portion 24 comes into contact with the projection of the second fitting portion 25, the second fitting portion 25 is pressed, and the compression spring 26 contracts. To do.

  Further, when the shaft portion 30 of the first bracket 22 and the first fitting portion 24 rotate, the protruding portion of the first fitting portion 24 exceeds the protruding portion of the second fitting portion 25 as shown in FIG. Thus, the second fitting portion 25 is returned to the original position by the compression spring 26.

  By repeating this operation, the stand 3 is automatically opened without receiving the frictional force of the torque hinge 27.

  Next, the case where the housing | casing 2 and the stand 3 operate | move in the direction which mutually approaches is demonstrated. The case where the casing 2 and the stand 3 operate in a direction approaching each other is (1) when the stand 3 is closed as shown in FIG. 14, and (2) when the stand 3 is placed as shown in FIG. There are times when it is placed on the surface and the casing 2 is pushed down. In either case, the same behavior is taken.

  First, the housing 2 and the stand 3 are brought close to each other. At this time, as shown in FIG. 16, the shaft part 30 and the first fitting part 24 of the first bracket 22 rotate integrally.

  As a result, as shown in FIG. 17, the first fitting portion 24 comes into contact with the second fitting portion 25, and the protruding portion of the first fitting portion 24 and the protruding portion of the second fitting portion 25 are Engage with each other.

  Next, as shown in FIG. 18, the first fitting portion 24 and the second fitting portion 25 are engaged with the shaft portion 30 of the first bracket 22 while the protruding portion of the first fitting portion 24 and the protruding portion of the second fitting portion 25 are engaged with each other. When the portion 24 rotates, the torque hinge 27 receives a pressing force from the compression spring 26, and a rotational force acts on the torque hinge 27. When the frictional force of the torque hinge 27 is greater than the rotational force acting on the torque hinge 27, the stand 3 is not closed and the angle between the stand 3 and the housing 2 is maintained. On the other hand, when the rotational force acting on the torque hinge 27 is greater than the frictional force of the torque hinge 27, the angle between the stand 3 and the housing 2 is reduced, and the stand 3 is closed.

  As a result, the stand 3 can be closed by applying a predetermined force or more to the housing 2 and the stand 3. On the other hand, when a force smaller than a predetermined force is applied to the housing 2 and the stand 3, for example, the stand 3 is placed on the placement surface and the finger touches the display surface of the housing 2. When the force is applied, the casing 2 can be maintained in an upright state so that the casing 2 does not fall down.

[Stand open mechanism]
Next, the automatic opening mechanism 40 of the stand 3 applicable to the tablet terminal 1 according to the first and second embodiments of the present invention will be described.
The automatic opening mechanism 40 automatically opens the stand 3 by a mechanical structure when the housing 2 is placed on a mounting surface such as a table. For example, the automatic release mechanism 40 may be provided separately from the lock mechanism 13 described above, and the stand 3 may be opened by releasing both locks.

  As shown in FIGS. 7 and 8, the automatic opening mechanism 40 includes, for example, a first slider 41, a first spring portion 42, a second slider 43, a second spring portion 44, and the like.

  The first slider 41 is a rod-shaped member provided in the X-axis direction of the housing 2 and receives a pressing force from the first spring portion 42 on one end side. The first slider 41 is movable in the X axis direction. The other end side of the first slider 41 is in contact with the second slider 43.

  The second slider 43 is a rod-shaped member provided in the Y-axis direction of the housing 2 and receives a pressing force from the second spring portion 44 on the upper end side. The second slider 43 is movable in the Y axis direction. The lower end of the second slider 43 protrudes from the outer peripheral surface of the housing 2 as shown in FIG. 19, and is placed on a placement surface such as a table as shown in FIG. Acts on the second slider 43, the second slider 43 moves upward as shown in FIG. On the side surface of the second slider 43, a protruding portion 46 protruding toward the first slider 41 is formed.

  A groove 45 is formed inside the first slider 41 along the longitudinal direction of the first slider 41. As shown in FIGS. 20 and 21, the engaging portion 12 installed on the stand 3 is inserted into the groove 45, and the engaging portion 12 is engaged with the first slider 41 at one end of the groove 45. As shown in FIGS. 23 and 24, the first slider 41 is pressed by the protrusion 46 of the second slider 43, and the first slider 41 moves in the X-axis direction, so that the engaging portion 12 and the first slider are moved. The engagement with 41 is released. Thereby, the closed stand 3 is opened as shown in FIGS.

  19 to 21 show a state in which the stand 3 is closed and the engaging portion 12 is engaged with the first slider 41 at one end portion of the groove 45. Thereafter, as shown in FIGS. 22 to 24, when the housing 2 is tilted so that the back side of the housing 2 is down, an upward force is applied to the second slider 43 from the placement surface. The second slider 43 moves upward. At this time, the first slider 41 is pressed by the protrusion 46 of the second slider 43, and the first slider 41 moves in the X-axis direction. In addition, the protrusion part 46 has an upward slope, and the edge part of the 1st slider which contacts the protrusion part 46 has a downward slope.

  As the first slider 41 moves in the X-axis direction, the groove 45 moves to a position where it does not engage with the engaging portion 12 as shown in FIG. As a result, the engagement between the engaging portion 12 and the first slider 41 is released, and the closed stand 3 is released as shown in FIGS.

  By adjusting the relationship between the upward movement amount of the second slider 43 and the movement amount of the first slider 41 where the engagement between the engagement portion 12 and the first slider 41 is released, the housing 2 is predetermined. It can be set so that the stand 3 is opened when it is tilted more than the angle.

1: Tablet terminal 2: Housing 3: Stand 4: Hinge 5: Proximity sensor 6: Acceleration sensor 7: Control unit 8: Impact detection unit 9: Movement detection unit 10: Judgment unit 11: Lock control unit 12: Engagement unit 13: Lock mechanism 15: Portable information terminal 16: Keyboard 17: Connection detection unit 18: Acceleration sensor 20: One-way hinge mechanism 21: Torsion spring 22: First bracket 23: Second bracket 24: First fitting unit 25: First 2 fitting part 26: compression spring 27: torque hinge 28: third bracket 29: fixing part 30: shaft part 31: fixing part 32: shaft part 40: automatic opening mechanism 41: first slider 42: first spring part 43 : Second slider 44: second spring portion 45: groove 46: protrusion

Claims (8)

A panel-shaped housing;
A stand that is pivotally connected to the housing and is openable and closable with respect to the housing;
An impact detector that detects an impact that occurs in the housing after the housing moves in the in-plane direction from top to bottom;
An inclination detector for detecting a predetermined inclination of the housing;
A determination unit that determines whether or not the predetermined inclination is detected by the inclination detection unit within a predetermined time after the impact is detected by the shock detection unit;
In the determination unit, when it is determined that the predetermined inclination is detected in the inclination detection unit within the predetermined time, a control unit that opens the closed stand unit;
A portable information terminal comprising:   The portable information terminal according to claim 1, wherein the predetermined inclination is an inclination generated when the casing moves in a direction perpendicular to an in-plane direction of the casing. A proximity detection unit that is provided in the case and detects proximity or contact of a dielectric to the case;
The control unit is closed when the proximity detection unit detects the proximity or the contact, and the determination unit determines that the predetermined inclination is detected by the inclination detection unit within the predetermined time. The portable information terminal according to claim 1 or 2, wherein the stand portion that is provided is opened. A panel-shaped housing;
A stand that is pivotally connected to the housing and is openable and closable with respect to the housing;
A proximity detector that is provided in the casing and detects proximity or contact of a dielectric to the casing;
An impact detector that detects an impact that occurs in the housing after the housing moves in the in-plane direction from top to bottom;
A control unit that opens the stand unit that is closed when the proximity or the contact is detected by the proximity detection unit and the impact is detected by the impact detection unit;
A portable information terminal comprising: A panel-shaped housing;
A stand that is pivotally connected to the housing and is openable and closable with respect to the housing;
A keyboard part detachable from the housing;
An inclination detector for detecting a predetermined inclination of the housing;
A connection detection unit for detecting connection between the housing and the keyboard unit;
A movement detection unit for detecting movement in the keyboard unit;
When the connection detecting unit detects the connection between the housing and the keyboard unit, the tilt detecting unit detects the predetermined tilt, and the movement detecting unit detects the stationary state of the keyboard unit A control part for opening the closed stand part;
A portable information terminal comprising: A lock portion for fixing the stand portion to the housing when the stand portion is closed;
The portable information terminal according to any one of claims 1 to 5, wherein the control unit drives the lock unit to open the closed stand unit.   The portable information terminal according to any one of claims 1 to 6, further comprising a hinge mechanism that fixes the casing to the stand portion at an arbitrary angle and maintains the standing state of the casing. The hinge mechanism is
Torque is applied when a force is applied in a direction to reduce the angle formed by the stand part and the housing from the state where the housing is raised.
The portable information terminal according to claim 7, wherein no torque is applied when a force is applied in a direction in which an angle formed by the stand portion and the casing is increased from a state where the casing is erected.

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