JP2011075394A - Electronic apparatus system and portable electronic apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To prevent a backside input means from being unintentionally operated in the course of mounting a portable electronic apparatus such as a portable navigation device 2 and/or after the completion of its mounting by structuring the apparatus so as to negate operations using the input means disposed on the backside of an enclosure 21 of the navigation device 2 when the apparatus is in the course of mounting, that is, the apparatus is going to be mounted on a mounting device firmly fixed on a vehicle, and/or the mounting has been completed. <P>SOLUTION: This electronic apparatus system includes the portable electronic apparatus with a backside input means disposed on the backside of the enclosure with a display monitor disposed in front thereof and the mounting device for thereon mounting the electronic apparatus. The apparatus system is made by demountably mounting the electronic apparatus on the mounting device. The electronic apparatus and/or the mounting device are/is equipped with a mounted-state detection means for detecting the mounted state of the electronic apparatus on the mounting device. Further, operations using the input means disposed on the backside of the enclosure are negated by the electronic apparatus when the electronic apparatus is detected to be in a prescribed mounted state by the detection means. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to an electronic device system including a portable electronic device in which an input unit is disposed on the back surface of a housing, and an attachment device for detachably attaching the input device to a dashboard of a vehicle. More specifically, when the portable electronic device is in a state of being attached to the attachment device (hereinafter simply referred to as attachment) and / or in a state of being attached (hereinafter simply referred to as attachment completion). By configuring so that the operation of the input means arranged on the back of the housing is invalidated, it is prevented that the input means on the back of the housing is unintentionally operated during and / or after the completion of the mounting. The present invention relates to an electronic device system and a portable electronic device.

  As an electronic device system mounted on a vehicle, various systems such as a portable liquid crystal television or a portable navigation device and an attachment device are known. When such a portable electronic device is mounted on a vehicle, an attachment device called a cradle is used. The cradle is fixed to the dashboard of the vehicle in advance, and has a mounting mechanism (also provided on the portable electronic device side) for detachably mounting the portable electronic device. An electronic device system is constructed by mounting a portable electronic device on the cradle.

  For example, the following Patent Document 1 (Japanese Patent Laid-Open No. 2003-166848) discloses a portable and in-vehicle navigation device having a man navigation mode (portable mode) and a vehicle mode. When this navigation device is used in the in-vehicle mode, the navigation device is attached to a fixture installed in the vehicle.

  On the other hand, in the case of portable electronic devices, mechanical input means (power ON / OFF switch, trackball, joystick, other push buttons, etc.) are arranged on the front and side surfaces (mainly the front surface) of the housing. It is common. However, recently, an electronic device is also provided in which an input device is arranged on the back of the apparatus housing so that the user can hold the electronic device with one hand and perform a simple device operation with a finger attached to the back of the electronic device. In addition to the reasons described above, the input means is provided on the rear surface of the housing. For example, in the case of a portable navigation device, the demand for downsizing or thinning of the housing and the upsizing of the liquid crystal monitor increases There is also a reason that the space on the front side or the side where a typical input means can be arranged is limited.

  Such a portable electronic device is disclosed in, for example, the following Patent Document 2 (Japanese Patent Laid-Open No. 8-123760). This electronic device is provided with an input means that protrudes from the back of the portable electronic device, and can be operated with only one hand. A display means is provided on the front of the housing, and a trackball is provided as an input on the back of the housing. Alternatively, an input button is provided.

JP 2003-166848 A JP-A-8-123760

  By the way, when the portable electronic device is attached to the attachment device, the portable electronic device is held in the hand, alignment with the attachment device, and subsequent attachment operation, for example, for attachment provided in the portable electronic device After aligning the linear convex part with the linear concave part for attachment provided in the attachment device, an operation of sliding the linear convex part in the linear concave part to complete the mounting is performed.

  Such alignment and mounting operations are essential for this type of electronic device system. If the portable electronic device is simply placed at an appropriate location on the mounting device, the portable electronic device can be easily detached from the mounting device and dropped due to the shaking of the vehicle during traveling. This is because it is necessary to securely fix the portable electronic device to the attachment device. For this purpose, the portable electronic device is provided with, for example, a linear convex portion, and the mounting device is provided with, for example, a linear concave portion that fits into the linear convex portion, or is provided with a tightening mechanism such as a screw or a spring. Or

  Note that “mounting” as used in this specification does not indicate a state in which the portable electronic device is simply placed on the attachment device, as is apparent from the above description, but the portable electronic device is attached to the attachment device. It shall indicate a substantially fixed state in order to allow position adjustment after fixing or fixing. By the way, the “substantially fixed state” means that the portable electronic device is firmly attached to the mounting device, but the positional relationship between the portable electronic device and the mounting device is constant so that the orientation of the monitor etc. can be changed. The state that can be changed within the range of.

  As described above, in order to attach the portable electronic device to the mounting device, the portable electronic device is firmly held with one hand or both hands from the start of attachment until the attachment is completed, that is, during the attachment. Thus, it is necessary to perform the operation of pressing and fitting the portable electronic device to the attachment device after aligning the position with the portable electronic device and the attachment device. In some cases, it is necessary to adjust the orientation of the monitor and then complete the mounting by screwing or the like. At this time, it is known from experience that there is a tendency to unintentionally depress input means (hereinafter referred to as back face input means) arranged on the back of the housing. In addition, if the orientation of the portable electronic device can be adjusted after the portable electronic device is attached to the attachment device, that is, after the attachment is completed, the rear input means is not intended to be pressed during the adjustment. It is also known from experience that there are cases where they are equal.

  Due to the above-mentioned problems, it is difficult to visually recognize the back input means from the front of the portable electronic device, so the orientation of the monitor is adjusted when gripping the portable electronic device or after mounting. This is because the finger of the hand suddenly touches the back input means. For example, in the case of a portable navigation device, such an event may be a complicated operation for returning to the original state when the device body is unintentionally turned on or an unintended image is displayed. It can also be a required cause.

  The present invention has been made paying attention to the above-mentioned problems, and the purpose thereof is a portable electronic device in which a back input means is disposed on the back of a housing in which a display monitor is disposed on the front, A mounting device for mounting the portable electronic device, and an electronic device system in which the portable electronic device is detachably mounted on the mounting device, and is in the middle of mounting and / or mounting is completed In such a state, the operation by the back surface input means is invalidated so that the back surface input means can be prevented from being operated unintentionally during the mounting and / or after the mounting is completed. An object is to provide a device system and a portable electronic device.

  In order to solve the above-described problem, the invention according to claim 1 of the present application includes a portable electronic device in which a rear input unit is disposed on the back surface of a casing in which a display monitor is disposed on the front surface, and the portable electronic device. And an attachment device for attachment, wherein the portable electronic device is detachably attached to the attachment device, wherein the portable electronic device and / or the attachment device includes: And a mounting state detecting unit that detects a mounting state of the portable electronic device to the mounting device. Further, when the portable electronic device is detected by the mounting state detecting unit to be in a predetermined mounting state. The operation by the back surface input means arranged on the back surface of the housing is invalidated.

  The invention according to claim 2 of the present application is the electronic device system according to claim 1, wherein when the portable electronic device is detected to be in a predetermined wearing state by the wearing state detecting means, the housing is provided. It is characterized by comprising control means for invalidating the operation by the back face input means arranged on the back face of the body.

  The invention according to claim 3 of the present application is the electronic device system according to claim 1 or 2, wherein the predetermined mounting state is a state in which the portable electronic device is being mounted on the mounting device, It is characterized in that it is in a state in which the mounting is completed.

  The invention according to claim 4 of the present application is the electronic device system according to any one of claims 1 to 3, wherein the wearing state detection means is a non-contact type switch configured by a photoelectric sensor or a proximity sensor, Alternatively, it is configured by a contact type switch for detecting a mechanical state, or a combination thereof.

  According to a fifth aspect of the present invention, there is provided a portable electronic device in which a rear input means is disposed on the back surface of a casing in which a display monitor is disposed on the front surface, and an attachment device for attaching the portable electronic device. A portable electronic device constituting an electronic device system in which the portable electronic device is detachably attached to the attachment device, wherein the portable electronic device is the portable electronic device. Mounting state detecting means for detecting the mounting state of the portable electronic device on the back side of the housing when the mounting state detecting means detects that the portable electronic device is in a predetermined mounting state. The operation by the arranged rear input means is invalidated.

  The invention according to claim 6 of the present application is the portable electronic device according to claim 5, wherein when the portable electronic device is detected to be in a predetermined wearing state by the wearing state detecting means, Control means for invalidating the operation by the back surface input means disposed on the back surface of the housing is provided.

  Further, the invention according to claim 7 of the present application is the portable electronic device according to claim 5 or 6, wherein the predetermined mounting state is a state in which the portable electronic device is being mounted to the mounting device. And / or a state in which the mounting is completed.

  The invention according to claim 8 of the present application is the portable electronic device according to any one of claims 5 to 7, wherein the wearing state detecting means is a photoelectric sensor or a proximity sensor. Or a contact-type switch for detecting a mechanical state, or a combination thereof.

  By providing the above configuration, the present invention has the following excellent effects. That is, according to the electronic device system according to claim 1, when the portable electronic device is mounted in a predetermined mounting state, the operation by the input means (back surface input means) arranged on the back surface of the housing is invalid. It is said. Therefore, it is possible to prevent the input unit from being operated unintentionally during the period.

  Further, according to the electronic device system according to claim 2, in the electronic device system according to claim 1, when the portable electronic device is detected by the wearing state detection means to be in a predetermined wearing state, Control means for invalidating the operation by the back surface input means disposed on the back surface of the housing is provided. That is, the operation by the input means (back face input means) arranged on the back surface of the casing is invalidated by the control means.

  According to the electronic device system according to claim 3 of the present application, in the electronic device system according to claim 1 or 2, the predetermined attachment state is attachment in which the portable electronic device is to be attached to the attachment device. It is characterized in that it is in the middle and / or in a state where the attachment is completed. As a result, at least the period when the portable electronic device is about to be attached to the attachment device and / or the period after the attachment is completed until the portable electronic device is removed from the attachment device, the input arranged on the back surface of the housing The operation by the means (back surface input means) is invalidated. Therefore, it is possible to prevent the input unit from being operated unintentionally during the period. In other words, during the period, a major factor that causes the portable electronic device to execute a process unintended by the user is eliminated, so that a complicated operation is not required to return to the original state.

  Note that the target detected by the mounting state detection means is “the state in the middle of mounting and / or the state in which the mounting is about to be performed”. It can be detected by specifying the “start time” and “mounting completion time” respectively. By detecting this state, it is possible to prevent a finger from accidentally touching the back surface input means during an operation at the time of mounting, thereby preventing erroneous operation.

  Further, the “state after completion of attachment” can be detected, for example, by specifying “attachment completion time point” and “time point when the portable electronic device is removed from the attachment device”. By detecting this state, it is possible to prevent the back surface input means from being erroneously operated when performing operations such as changing the orientation of the monitor of the portable electronic device after completion of the mounting.

  In addition, “the state in the middle of attachment and the state in which the attachment is about to be performed” can be detected by specifying “the point of start of attachment” and “the point of time when the portable electronic device is removed from the attachment device”. . By this state detection, during the continuous period from when the portable electronic device is about to be attached to the attachment device until the portable electronic device is removed from the attachment device, that is, over the entire period during which the back surface input means is likely to be erroneously operated. Thus, it is possible to prevent the back surface input means from being erroneously operated.

  According to the electronic device system of the fourth aspect, the wearing state detecting means according to the present invention can be easily realized. That is, by using a non-contact type switch and / or a contact type switch, for example, by detecting when the portable electronic device is brought into contact with the attachment device or when the portable electronic device is brought close to the attachment device, “ By specifying the “mounting start point” or by detecting when the portable electronic device and the mounting device are in a predetermined positional relationship by paying attention to the mounting mechanism, the “mounting completion point” or “portable electronic device is mounted” It becomes possible to identify the “point of time when it is removed from the apparatus” and to detect a desired wearing state.

  According to the invention of claim 5, it is possible to provide a portable electronic device constituting the electronic device system according to claim 1.

  According to the invention of claim 6, it is possible to provide a portable electronic device constituting the electronic device system according to claim 2.

  According to the invention of claim 7, it is possible to provide a portable electronic device constituting the electronic device system according to claim 3.

  According to the invention of claim 8, it is possible to provide a portable electronic device constituting the electronic device system of claim 4.

It is a figure which shows the electronic device system formed by mounting | wearing the cradle as an attachment apparatus with the portable navigation apparatus as a portable electronic device. It is a whole perspective view which shows the external appearance of an attachment apparatus. FIG. 3A is an overall perspective view showing an appearance of the portable navigation device, FIG. 3A is a diagram showing a front surface of the portable navigation device, and FIG. 3B is a diagram showing a rear surface of the portable navigation device. It is a block diagram which shows schematic structure of a portable navigation apparatus.

  Hereinafter, specific examples of the present invention will be described in detail with reference to examples and drawings. However, the embodiment described below shows an example of an electronic device system including a portable electronic device and a mounting device that embody the technical idea of the present invention, and the present invention is limited to this electronic device system. In particular, the portable electronic device is not limited to the portable navigation device, and the attachment device is not limited to the cradle, and the present invention falls within the scope of the claims. It is equally applicable to those of other embodiments.

  FIG. 1 is a partially transparent external view showing an electronic device system of this embodiment in which a portable navigation device as a portable electronic device is mounted on a cradle as an attachment device. In addition, the part shown with a dotted line represents the part which cannot actually be visually recognized from the front side. As is apparent from the figure, the electronic device system of the present embodiment is configured by mounting the portable navigation device 2 on the cradle 1 via the mounting mechanism. Here, first, the configuration of the cradle 1 will be described.

  As shown in FIG. 2, the cradle 1 is detachably mounted with a stand 11 made of a cylindrical synthetic resin whose lower surface is fixed to a dashboard of a vehicle, for example, with an adhesive tape, and a portable navigation device. And a mounting table 12 made of a synthetic resin having a mounting part 121 and a backrest part 122, and curved so that the mounting table 12 can be swung vertically and horizontally within a predetermined range with respect to the stand 11. It has a metal arm 13 in a loose shape (simplified as a straight line in the figure) that can be changed to a posture. With the arm 13 having such a configuration, when the portable navigation device 2 is mounted on the cradle 1, the portable navigation device 2 can also swing up and down and left and right within a predetermined range with respect to the stand 11. It has become.

  As shown in FIG. 2, from the backrest portion 122 of the mounting table 12, a linear convex portion 12A having an inverted L-shaped horizontal section and a linear convex portion having an L-shaped horizontal section. 12B protrudes so as to be parallel to each other. These linear convex portions 12A and 12B are shaped to be fitted into linear concave portions of the portable navigation device 2 described later. That is, these linear convex portions 12A and 12B function as a mounting mechanism on the cradle 1 side.

  Next, as shown in FIG. 3, the portable navigation device 2 includes a depth substantially the same as the depth of the mounting portion 121 of the mounting table 12 shown in FIG. 2, and the lateral width of the backrest portion 122 of the mounting table 12. It has a rectangular parallelepiped casing 21 having a lateral width and height longer than the height. As shown in FIG. 3A, a monitor 22 (touch panel) that occupies most of the surface of the housing 21 is disposed on the surface of the housing 21, and the narrow space at the lower left of the monitor 22 is difficult to realize with a touch panel. A power ON / OFF switch 23 is arranged as a front input means. In FIG. 3A, only the power ON / OFF switch 23 is shown in the space below the monitor 22, but a trackball, joystick, other push buttons, and the like can be arranged as necessary. .

  On the other hand, as shown in FIG. 3B, the rear surface of the casing 21 is composed of four scroll buttons for designating four directions, up, down, left, and right, and a current position button arranged at the center of the scroll buttons. A back surface input means 24 is arranged. Further, two linear convex portions 12A and 12B projecting from the backrest portion 122 of the mounting table 12 previously shown in FIG. 2 and linear concave portions 25A and 25B respectively corresponding one to one are provided. These linear recesses 25A and 25B function as a mounting mechanism on the portable navigation device 2 side.

  In the present embodiment, the map image is scrolled by a predetermined distance in a predetermined direction by pressing the scroll button of the back surface input means 24. Further, when the current position button is pressed, a map image centered on the current position detected by the current position detecting means described later is displayed.

  In the present embodiment, a contact opening / closing switch (mechanical switch) (not shown) is attached to the upper ends of the linear recesses 25A and 25B, and the linear recesses 25A and 25B of the portable navigation device are connected to the linear recesses 25A and 25B. When the linear convex portions 12A and 12B of the cradle are respectively inserted, the upper end portion of the linear convex portion is configured to put the contact opening / closing switch in the “closed” state. That is, when the portable navigation device 2 is not attached to the cradle 1, the contact opening / closing switch is in the “open” state.

  By attaching such a contact opening / closing switch to the upper ends of the linear recesses 25A and 25B, it is possible to detect whether or not the portable navigation device 2 has been completely attached to the cradle 1. That is, the “predetermined wearing state” as referred to in the present invention can be detected. And while the portable navigation apparatus 2 is mounted on the cradle 1, the control means of the portable navigation apparatus 2 to be described later can handle the operation as invalid even when the rear input means 24 is pressed. ing. By adopting such a configuration, it is possible to prevent the back input means 24 from being erroneously operated when performing operations such as changing the orientation of the portable navigation device 2 after completion of the mounting. In particular, after completion of the mounting, even if the portable navigation device 2 is powered on and in operation, there are many cases where the angle is adjusted, and in such a case, a problem occurs even if the rear input means 24 is operated incorrectly. Nothing will happen.

  The contact opening / closing switch as described above is a so-called contact type switch, and the contact state switch, the linear convex portions 12A and 12B, and the linear concave portions 25A and 25B realize the mounting state detecting means of the present invention. Of these, the contact opening / closing switch may be a non-contact switch such as a photoelectric sensor or a proximity sensor.

  Further, by attaching the contact opening / closing switch to the lower end portions of the linear recesses 25A and 25B, it is possible to specify the “mounting start time” and the “mounting completion point”, respectively. It is possible to detect “a state in the middle of wearing” as a predetermined wearing state. Alternatively, by attaching a contact opening / closing switch only at the lower end of each of the linear recesses 25A and 25B, or at both the upper end and the lower end, the “mounting start point” and “the portable navigation device has been removed from the cradle. During the continuous period from the time when the portable navigation device is about to be mounted on the cradle by identifying the time point with the contact opening / closing switch at the upper end and / or the lower end, until the portable navigation device is removed from the cradle, That is, it is possible to prevent the back surface input unit 24 from being erroneously operated over the entire period in which the back surface input unit 24 is likely to be erroneously operated.

  Next, the configuration and function of the portable navigation device 2 will be described with reference to FIG. FIG. 4 is a block diagram showing a schematic configuration of the portable navigation device 2. The portable navigation device 2 includes a control unit 30, a current position detection unit 31, an input unit 32 including a front input unit 32A and a rear input unit 32B, a display unit 33, a map data storage unit 34, and a communication unit. 35, voice notification means 36, and wearing state detection means 37.

  The control unit 30 includes an internal memory (not shown) such as a CPU, a ROM, and a RAM, and controls the navigation device. In addition, the control unit 30 performs calculation for route search, and the portable state navigation device 37 uses the wearing state detection unit 37. While it is detected that 2 is attached to the cradle 1, processing for invalidating the operation of the back surface input means 24 (reference numeral 32B in FIG. 4) shown in FIG. 3 is executed. That is, even if a signal is transmitted from the back surface input means 24 (reference numeral 32B in FIG. 4), control such as scrolling based on the signal is not performed.

  The current position detection means 31 includes a GPS receiver, a speed sensor, a direction sensor, and the like, and detects the current position of the portable navigation device 2 using these.

  The input means 32 includes the front input means 23 (reference numeral 32A in FIG. 4) previously shown in FIG. 3 and the rear input means 24 (reference numeral 32B in FIG. 4) previously shown in FIG. The navigation device 2 includes a mechanical switch for turning on / off the power, inputting a destination, and other various inputs.

  The display means 33 plays a role as a man-machine interface for displaying a map image and a route image so that the user can visually recognize the image. In addition, this display means 33 can also be comprised so that it may comprise a touch sensor and may bear a part of front surface input means 32A. In this case, an input is performed when the user touches an icon displayed on the screen.

  The map data storage means 34 stores map data and map images including road node data whose nodes are nodes such as road intersections and branch points, and road link data whose routes are links between the nodes. Has been. More specifically, map nodes have road nodal points and inflection points as road nodes, routes connecting the road nodes as links, and cost information (distance and required time) of all links as a database.

  The control means 30 includes a map data storage means 34 for the current position detected by the current position detection means 31 or the route from the departure point input via the input means 32 to the destination input via the input means 32. Search with reference to the map data stored in. Then, based on the searched route, images such as a map, a route, and a current position are displayed on the display means 33, and guidance to the destination is executed.

  The communication unit 35 includes an antenna, and obtains the latest map data as appropriate from a predetermined server on the network. It is also used for obtaining VICS (registered trademark) information and the like.

  The voice notification means 36 is constituted by a speaker or the like, and performs guidance notification at the time of route guidance, key operation sound, and other various voice notifications related to the portable navigation device 2.

  Finally, as described above, the mounting state detection means 37 is configured by a contact-type switch or a non-contact switch, but substantially further, linear protrusions 12A and 12B of the cradle 1 (FIG. 2). And the linear recesses 25A and 25B (see B in FIG. 3) of the portable navigation device 2, and as described above, while the portable navigation device 2 is about to be attached to the cradle 1. The state and / or the state of completion of mounting are detected.

  In the above embodiment, the mounting mechanism between the portable navigation device 2 and the cradle 1 is embodied by adopting a linear convex portion and a linear concave portion, but there are various other mounting mechanisms. This is a design matter that can be applied as necessary by those skilled in the art.

  As described above, according to the electronic device system and the portable electronic device of the present embodiment, a state in which the portable navigation device is about to be attached to the cradle and / or a state where the attachment has been completed is detected. During the period, the operation of the back surface input means is invalidated, so that an unnecessary operation unintended by the user can be prevented and a complicated operation is required to return to the original state. There is nothing.

  Moreover, in the said embodiment, if the mounting state detection means 37 detects the state in the middle of mounting | wearing and / or the state in which mounting | wearing was completed which is going to mount | wear the portable navigation apparatus 2 to the cradle 1, Although the operation by the rear input unit 32B is invalidated, the present invention is not limited to this. For example, a switch is provided in a line such as a bus connecting the rear input unit 32B and the control unit 30, and the switch is attached to the mounting state detection unit 37. The switch is used as a switch used in the mobile navigation device, or the switch used in the mounting state detecting means 37 is interlocked, so that the linear concave portions 25A and 25B of the portable navigation device 2 are linearly convex in the cradle 1. The configuration may be such that when the portions 12A and 12B are inserted, the switch is in the “open” state. That is, when the portable navigation device 2 is about to be attached to the cradle 1 and / or when the attachment is completed, the switch is in the “open” state, so that the rear input means 32B and the control means 30 are electrically connected. It may be configured such that the signal from the rear input means 32B cannot be transmitted to the control means 30.

  In addition, as described above, when the contact opening / closing switch is attached to both the upper end and the lower end of each of the linear recesses 25A and 25B, it is possible to detect “a state of attachment in progress”. In the state of mounting in the middle of mounting, the operation by the front input means 23A may be invalidated. Normally, since the operation is not performed during the mounting, the operation by the front input unit 23A is invalidated, and further an unintended operation can be prevented. Further, during the mounting, the mounting is not completed and the mounting is not completed, and it is possible to notify that the mounting is not completed by invalidating the operation by the front input means 23A.

1 Cradle (Mounting device)
2 Portable navigation devices (portable electronic devices)
DESCRIPTION OF SYMBOLS 11 Stand 12 Mounting base 12A Linear convex part 12B Linear convex part 13 Arm 21 Case 22 Monitor 23 Power ON / OFF switch (front input means)
24 rear input means 25A linear recess 25B linear recess 30 control means 31 current position detection means 32 input means 32A front input means 32B rear input means 33 display means 34 map data storage means 35 communication means 36 voice notification means 37 wearing state detection Means 121 Mounting portion 122 Backrest portion

Claims (8)

A portable electronic device having a rear input means disposed on the rear surface of a housing on which a display monitor is disposed; and an attachment device for attaching the portable electronic device. An electronic device system that is detachably attached to the attachment device,
The portable electronic device and / or the attachment device includes attachment state detection means for detecting a attachment state of the portable electronic device to the attachment device,
Furthermore, the portable electronic device includes:
An electronic device system characterized in that, when it is detected by the mounting state detecting means that the apparatus is in a predetermined mounting state, the operation by the back surface input means arranged on the back surface of the casing is invalidated. The portable electronic device is:
2. The control device according to claim 1, further comprising: a control unit that invalidates an operation by a back surface input unit disposed on a back surface of the housing when the mounting state detection unit detects that the vehicle is in a predetermined mounting state. The electronic device system described.   3. The electronic device according to claim 1, wherein the predetermined mounting state is a state in which the portable electronic device is about to be mounted on the mounting device and / or a state where the mounting is completed. system.   The said mounting state detection means is comprised by the non-contact type switch comprised by a photoelectric sensor or a proximity sensor, the contact type switch which detects a mechanical state, or these combination, It is characterized by the above-mentioned. The electronic device system according to any one of 1 to 3. A portable electronic device having a rear input means disposed on the rear surface of a housing on which a display monitor is disposed; and an attachment device for attaching the portable electronic device. A portable electronic device constituting an electronic device system that is detachably attached to the attachment device,
The portable electronic device includes an attachment state detection unit that detects an attachment state of the portable electronic device to the attachment device,
When the portable electronic device detects that the portable electronic device is in a predetermined wearing state by the wearing state detecting unit, the portable electronic device invalidates the operation by the back surface input unit disposed on the back side of the casing. Type electronic equipment. The portable electronic device is:
6. The control device according to claim 5, further comprising: a control unit that invalidates an operation by a back surface input unit disposed on a back surface of the housing when the mounting state detection unit detects a predetermined mounting state. The portable electronic device described.   The portable type according to claim 5 or 6, wherein the predetermined wearing state is a state in which the portable electronic device is being attached to the attachment device and / or a state in which attachment is completed. Electronics.   The said mounting state detection means is comprised by the non-contact type switch comprised by a photoelectric sensor or a proximity sensor, the contact type switch which detects a mechanical state, or these combination, It is characterized by the above-mentioned. The portable electronic device according to any one of 5 to 7.

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