JP2009018611A - On-board portable navigation apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To improve the radiation of electronic apparatus mounted on a vehicle by a simple and inexpensive structure. <P>SOLUTION: An on-board portable navigation system 1 includes an on-board stand 10, a main body 20 removably mounted on a vehicle via the on-board stand 10, and a screw 30 serving as a coupling bracket for coupling the on-vehicle stand 10 and the main body 20. A metal plate 25, which is made to contact with a heating element such as CPU 22, and a battery is provided in the main body 20. The screw 30 is connected to the metal plate 25 by screwing its top end inserted inside a body frame 21 into a screw hole drilled in the metal plate 25. Furthermore, a bellows-like fin 31 extended toward the front is connected to the screw 30. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a vehicle-mounted portable navigation device.

  Conventionally, for example, in an electronic device such as a vehicle-mounted television monitor or a portable navigation device mounted on a dashboard of a vehicle, for example, a body portion of the vehicle-mounted portable navigation device and the body portion are angled. A stand portion and the like that are supported in an adjustable manner are provided. Various electronic devices mounted on such a vehicle are provided with heat dissipation measures for each electronic device in order to prevent the device from becoming hot due to, for example, direct sunlight or heat generated from the electronic device main body.

As a structure for preventing the high temperature of various electronic devices mounted on the vehicle, for example, a thin metal sheet with good thermal conductivity is arranged inside the product exterior, and the heat transmitted through the metal sheet is made of aluminum blocks and aluminum. There is known an electronic apparatus configured to suppress a temperature rise inside a product by transmitting to a flexible arm via a mount (for example, Patent Document 1). In addition, an electronic device (for example, see Patent Document 2) configured to prevent a high temperature of other electronic components by making a point contact with a heat sink that is in surface contact with a heating element such as an IC, 2. Description of the Related Art There is known an electronic apparatus (for example, see Patent Document 3) in which a heat dissipation passage that extends upward from an upper surface of an electronic component is provided in an overhang portion that covers the upper portion of the electronic component in a state of a groove or a hole. Further, an electronic device (for example, Patent Document 4) or a positioning member of an electronic device having a structure for improving heat dissipation by bringing the heat dissipation surface of the heat generating element into close contact with the heat dissipation member via a holder is provided with a heat dissipation function. An electronic device (for example, Patent Document 5) is known.
JP-A-7-52719 JP 2001-111272 A JP 2002-359485 A JP 2000-332472 A Japanese Patent Laid-Open No. 11-245689

  However, since the in-vehicle electronic device disclosed in Patent Document 1 is generated in an electronic component having high exothermicity and then once diffused in the entire interior of the device, the heat is once again collected by the metal sheet. The heat dissipation efficiency is not good, other electronic components may become hot, and there are many parts such as using blocks and metal sheets to collect the heat diffused inside the device. Is complicated and expensive. In addition, the in-vehicle electronic device disclosed in Patent Document 2 has a configuration in which the arrangement of a heating element such as an IC is restricted and thus there is no degree of design freedom, and the main body is mounted on the vehicle via a stand. However, this is inconvenient because the arrangement of the main body is also restricted. Furthermore, all of the electronic devices disclosed in Patent Documents 3 to 5 take into consideration a device mounting device that holds the electronic device on the dashboard of the vehicle or changes the orientation of the electronic device freely. Instead, for example, it is difficult to efficiently dissipate the electronic device by holding the electronic device on the dashboard of the vehicle or attaching it to a device mounting device that can freely change the direction of various electronic devices. there were.

  An object of the present invention is to reliably improve the heat dissipation of an electronic device mounted on a vehicle with a simple and inexpensive configuration.

In order to solve the above-mentioned problem, the invention described in claim 1
In a vehicle-mounted portable navigation device comprising: a vehicle-mounted stand; a main body portion that is detachably mounted on a vehicle via the vehicle-mounted stand; and a coupling fitting that connects the vehicle-mounted stand and the main body portion.
A heat transfer member in contact with the heating element in the main body,
When the vehicle-mounted stand and the main body are connected, the heat transfer member and the connection fitting are configured to contact each other.

  According to a second aspect of the present invention, in the on-vehicle portable navigation device according to the first aspect, the heat transfer member is a metal plate, and the connection fitting is a screw.

  According to a third aspect of the present invention, in the on-vehicle portable navigation device according to the first or second aspect, a fin is connected to the connecting member.

The invention according to claim 4
In a vehicle-mounted portable navigation device comprising: a vehicle-mounted stand; a main body portion that is detachably mounted on a vehicle via the vehicle-mounted stand; and a screw that connects the vehicle-mounted stand and the main body portion.
A metal plate in contact with a heating element in the main body,
A fin connected to the screw,
The metal plate and the screw are in contact with each other when the vehicle-mounted stand and the main body are connected.

  According to the present invention, since the heat transfer member is in contact with the heating element in the main body, heat generated from the heating element can be efficiently transmitted through the heat transfer member. And when a heat-transfer member and a connection metal fitting contact, the heat transmitted from the heat generating body via the heat-transfer member can be efficiently transmitted to a vehicle-mounted stand. That is, according to the present invention, the heat generated by the heating element in the main body is guided to the outside of the main body via the heat transfer member and the connecting metal fitting and transmitted to the on-vehicle stand to efficiently dissipate the electronic device. Can do. Therefore, compared with the conventional vehicle-mounted portable navigation device, the heat dissipation efficiency can be reliably improved with a simple and inexpensive configuration.

  The best mode for carrying out a vehicle-mounted portable navigation device 1 (hereinafter simply referred to as a navigation device 1) according to the present invention will be described below in detail with reference to the drawings. The scope of the invention is not limited to the following description and illustrated examples.

<Overall configuration of navigation device>
FIG. 1 is a perspective view showing a configuration of a navigation device 1 according to the present embodiment, FIG. 2 is a front view thereof, and FIG. 3 is a rear view thereof. FIG. 4 is a right side view showing a usage state of the navigation device 1 according to the present embodiment, and FIG. 5 is a left side view thereof. FIG. 6 is a perspective view showing the configuration of the in-vehicle stand 10 in the present embodiment. FIG. 7 is an exploded view showing the connection structure of the navigation device 1 according to this embodiment, and FIG. 8 is a partial cross-sectional view showing a state in which the navigation device 1 according to this embodiment is assembled.

  As shown in FIGS. 1 to 5, the in-vehicle portable navigation device 1 is mounted on, for example, a dashboard of a vehicle (not shown), and the vehicle is installed via the in-vehicle stand 10 and the in-vehicle stand 10. And a screw 30 as a connecting fitting for connecting the in-vehicle stand 10 and the main body 20 to each other. In the following description, the vertical vertical direction is the Z-axis direction, the horizontal left-right direction orthogonal to the Z-axis direction is the Y-axis direction (left-right direction), and the front-back direction is orthogonal to both the Z-axis direction and the Y-axis direction. Is the X-axis direction.

<In-vehicle stand>
First, the configuration of the on-vehicle stand 10 will be described with reference to FIGS.
As shown in FIGS. 4 to 6, the in-vehicle stand 10 includes a pedestal 11 that is attached to a dashboard or the like of a vehicle (not shown), a base 12 that is rotatably attached to the pedestal 11, and an upper front portion of the base 12. And a mounting portion 13 on which the main body portion 20 is mounted.

  The pedestal 11 is attached to a vehicle dashboard, a windshield, or the like by fixing the flange-shaped peripheral edge portion 111 with, for example, a screw, a strong adhesive double-sided tape or a suction cup (not shown). The pedestal 11 is provided with an opening (not shown) that is opened in a substantially circular shape in plan view above the spherical portion 112 formed in a dome shape, and has elasticity inside the spherical portion 112. A substantially disc-shaped fixing plate (not shown) having a screw hole (not shown) into which the screw 14 is screwed at the center is provided. This fixing plate has a larger diameter than the opening provided in the upper part of the spherical surface portion 112.

  The base 12 has, for example, a substantially cylindrical shape having a lower end opened in a substantially circular shape and a bottom (upper bottom) at the upper end, and a mounting portion 13 on which the main body portion 20 is placed. Is extended. A hole (not shown) through which the screw 14 is inserted is formed in the upper bottom portion of the base 12. Then, in a state where the base 12 is attached to the pedestal 11, the lower opening (not shown) of the base 12 that is substantially circular in plan view matches the outer surface of the spherical surface portion 112 at a desired attachment angle. It has become.

  The screw 14 has a screw head having a diameter larger than that of the hole provided in the upper bottom portion of the base 12 at the upper end, and a bolt (a stopper) for preventing the fixing plate from dropping off at the lower end (one end). (Not shown) is provided. The screw 14 is loosely inserted into a hole provided in the center of the upper bottom portion of the base 12, and is loosely inserted into an opening provided in the top of the base 11, and further provided in the central portion of the fixing plate. Screwed into the screw hole. Then, by fastening the screw 14, the base 12 can be fixed at a desired mounting angle with respect to the spherical portion 112 of the base 11.

For example, as shown in FIGS. 4 to 6, the mounting portion 13 includes a substantially rectangular rear wall portion 131 facing the back surface of the main body portion 20, and a substantially horizontal surface from the lower end of the back wall portion 131 toward the front. A bottom portion 132 whose upper surface faces the lower surface of the main body portion 20, and a side wall portion 133 that extends from the back wall portion 131 and holds the side surface portion of the main body portion 20. A mounting hook 134 that engages and holds the back surface of the main body 20 is provided on a surface of the back wall 131 facing the main body 20.
Then, for example, as shown in FIG. 6, the mounting portion 13 has a screw 30 for vertically passing through the bottom portion 132 substantially at the center of the bottom portion 132 to connect the main body portion 20 and the mounting portion 13. Is provided with a screw hole portion 135 through which is inserted.

<Main body>
Next, the configuration of the main body unit 20 will be described.
As shown in FIGS. 7 and 8, in the main body 20, for example, an LCD (liquid crystal display) 23 disposed on the front surface of the main body frame 21 and an electronic circuit for displaying various images on the LCD 23. As a heat transfer member that is in contact with a heating element such as a CPU 22 or a battery (not shown), a printed wiring board 24 in which is mounted, a CPU 22 that controls the LCD 23 to display an image by driving the electronic circuit. The metal plate 25 is provided.

  Here, for example, as shown in FIGS. 7 and 8, the metal plate 25 is disposed so as to face the printed wiring board 24 with the CPU 22 interposed therebetween, and a part of the metal plate 25 is provided in contact with the CPU 22. . Specifically, the metal plate 25 is made of, for example, a metal having high thermal conductivity such as copper, and a part of the metal plate 25 is in close contact with the heat dissipation surface of the CPU 22, and the lower end is bent substantially horizontally to It arrange | positions so that it may become parallel to a part. The metal plate 25 and the lower surface portion of the frame 21 have positions corresponding to the screw holes 135 provided in the bottom portion 132 of the mounting portion 13 in a state where the main body portion 20 is mounted on the mounting portion 13. In addition, a screw hole (not shown) through which the screw 30 is inserted is provided.

<Screw>
For example, as shown in FIGS. 7 and 8, the screw 30 is inserted from below into a screw hole 135 provided in the bottom portion 132 in a state where the main body portion 20 is mounted on the mounting portion 13, and the lower surface of the main body frame 21. By being screwed into a screw hole provided in the part, the in-vehicle stand 10 and the main body part 20 function as a connecting metal fitting that is detachably connected. Further, the screw 30 is also connected to the metal plate 25 by screwing a tip portion of the screw 30 inserted into the main body frame 21 into a screw hole provided in the metal plate 25. . That is, the screw 30 in the present embodiment is configured to contact the metal plate 25 when the on-vehicle stand 10 and the main body 20 are connected. Furthermore, a bellows-like fin 31 extending toward the front is connected to the screw 30 in the present embodiment. The fin 31 functions as a heat radiating member for releasing heat generated by the CPU 22 or the like to the outside of the main body 20 via the metal plate 25 and the screw 30 inside the main body 20, for example.

<Operation of Embodiment>
Next, based on FIGS. 7-8, operation | movement description of the navigation apparatus 1 is performed.
First, when the navigation device 1 is mounted on a vehicle, after the main body 20 is mounted on the mounting portion 13 with the base 11 of the in-vehicle stand 10 attached to, for example, a dashboard or a windshield of the vehicle. The main body 20 is mounted on the vehicle by inserting and fastening the screws 30 into the screw hole 135, the main body frame 21 and the metal plate 25 from below the bottom 132.

  In this state, for example, when the temperature in the main body 20 rises due to direct sunlight or heat generation from a heating element such as the CPU 22, the heat in the main body 20 is transferred to the in-vehicle stand 10 via the metal plate 25 and the screw 30. While being transmitted, heat is efficiently radiated to the outside of the navigation device 1 through the fins 31 provided on the screw 30.

  In particular, in the present embodiment, since the metal plate 25 is in direct contact with the CPU 22 that is a heating element, the heat generated by the CPU 22 is quickly transmitted to the outside of the main body 20 through the metal plate 25. The fins 31 and the on-vehicle stand 10 efficiently dissipate heat from the inside of the main body 20 to the outside.

<Effect of embodiment>
As described above, according to the navigation device 1 according to the present invention, the heat generated from the CPU 22 by the metal plate 25 (heat transfer member) being in contact with the CPU 22 (heating element) in the main body 20. Can be efficiently transmitted through the metal plate 25. And when the metal plate 25 and the screw 30 (connection member) contact, the heat transmitted from CPU22 via the metal plate 25 can be efficiently transmitted to the vehicle-mounted stand 10. That is, according to the present invention, the heat generated by the CPU 22 in the main body portion 20 is quickly guided out of the main body portion 20 via the metal plate 25 and the screw 30 and transmitted to the in-vehicle stand 10 so that the portable navigation device for in-vehicle use. Heat dissipation of the device 1 (electronic device) can be performed efficiently. Therefore, the heat dissipation efficiency can be reliably improved with a simple and inexpensive configuration as compared with a conventional in-vehicle portable navigation device or the like.

  Further, by using the metal plate 25 as the heat transfer member and using the screw 30 as the connecting member, the heat dissipation efficiency can be reliably improved with a simple and inexpensive configuration.

  Furthermore, the heat dissipation efficiency can be further improved by connecting the fins 31 to the screws 30.

(Other)
For example, as shown in FIG. 9, the fin 31 may be configured so that one end thereof extends to the front of the air outlet of the cooling device provided in the vehicle on which the main body 20 is mounted. If it does in this way, the thermal radiation efficiency of the main-body part 20 can be improved further by the low temperature air which blown off from the blower outlet of the air conditioner.

  Further, in the state where the screw 30 is engaged with the metal plate 25, the fin 31 may be movable so that the attachment angle of the fin 31 can be changed (see FIG. 9). In this way, by changing the mounting angle of the base 13 with respect to the spherical surface portion 12 of the pedestal 10, even when the mounting angle of the main body portion 20 with respect to the vehicle is changed, the optimal position where the cold air hits is obtained. Since the fins 31 can be moved, the in-vehicle portable navigation device 1 with higher heat dissipation efficiency and better usability can be obtained.

It is a perspective view which shows the structure of the navigation apparatus which concerns on this embodiment. It is a front view which shows the structure of the navigation apparatus concerning this embodiment. It is a rear view which shows the structure of the navigation apparatus concerning this embodiment. It is a right view which shows the structure of the navigation apparatus concerning this embodiment. It is a left view which shows the structure of the navigation apparatus which concerns on this embodiment. It is a perspective view which shows the structure of the vehicle-mounted stand in this embodiment. It is an exploded view which shows the connection structure of the navigation apparatus which concerns on this embodiment. It is a partial section showing the state where the navigation device concerning this embodiment was assembled. It is a side view which shows the other example of the navigation apparatus which concerns on this embodiment.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 In-vehicle portable navigation apparatus 10 In-vehicle stand 11 Base 111 Peripheral part 112 Spherical surface part 12 Base 13 Mounting part 131 Back side wall part 132 Bottom part 133 Side wall part 134 Mounting hook 135 Screw hole part 14 Screw 20 Main body part (electronic device)
21 Body frame 22 CPU (heating element)
23 LCD (Liquid Crystal Display)
24 Printed wiring board (PCB)
25 Metal plate (heat transfer member)
30 screws (connection bracket)
31 Fin (Heat dissipation member)

Claims (4)

In a vehicle-mounted portable navigation device comprising: a vehicle-mounted stand; a main body portion that is detachably mounted on a vehicle via the vehicle-mounted stand; and a coupling fitting that connects the vehicle-mounted stand and the main body portion.
A heat transfer member in contact with the heating element in the main body,
The on-vehicle portable navigation device is configured such that the heat transfer member and the connection fitting come into contact with each other when the on-vehicle stand and the main body are connected. The in-vehicle portable navigation device according to claim 1,
The in-vehicle portable navigation device, wherein the heat transfer member is a metal plate and the connection fitting is a screw. The in-vehicle portable navigation device according to claim 1 or 2,
An in-vehicle portable navigation device, wherein a fin is connected to the connecting member. In a vehicle-mounted portable navigation device comprising: a vehicle-mounted stand; a main body portion that is detachably mounted on a vehicle via the vehicle-mounted stand; and a screw that connects the vehicle-mounted stand and the main body portion.
A metal plate in contact with a heating element in the main body,
A fin connected to the screw,
An in-vehicle portable navigation device, wherein the metal plate and the screw are in contact with each other when the in-vehicle stand and the main body are connected.

Images