JP2012173591A - Electronic apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To solve the problem of a conventional camera apparatus in which several heat radiation members are newly required for radiating heat generated in a cabinet to make the structure complicated.SOLUTION: An electronic apparatus as a digital camera 1 includes a liquid crystal monitor 7, and a liquid crystal holding part 22. Heat generated at an imaging element 21 and an electric element 24 as a heat generation source in a housing 2 of the digital camera 1 is conducted to the liquid crystal holding part 22 thermally connected to the heat generation source, for supporting the liquid crystal monitor 7 in the housing 2, to be discharged to the outside from a part of the liquid crystal holding part 22 being partially exposed to the outside on a bottom surface of the housing 2. Accordingly, the liquid crystal holding part 22 for supporting the liquid crystal monitor 7 also serves as a heat dissipation part, allowing heat generated at the heat generation source to be dissipated without newly providing the heat dissipation part.

Description

  The present invention relates to an electronic device including a display unit and a heat source.

  Conventionally, as this type of electronic device, for example, there is a camera device disclosed in Patent Document 1.

  In the cabinet of the camera device described in Patent Document 1, a circuit board on which an image signal processing circuit that generates heat when energized is mounted is provided. On the lower surface of the cabinet, a pedestal that is detachably attached to a tripod stand is provided. A shield plate that surrounds the circuit board and is made of a material that smoothly transfers heat is attached to the seat via the second heat radiating piece. The shield plate is connected to the image signal processing circuit of the circuit board through a heat sink formed from aluminum and a first heat radiating piece and a third heat radiating piece formed from heat conductive rubber. The heat generated in the image signal processing circuit is partly dissipated from the cabinet through the first and third heat dissipating pieces, the heat sink and the shield plate, and the remaining heat is transmitted through the shield plate to the second heat dissipating piece and the base. To flow through and dissipate heat.

JP 2001-194712 A

  However, in the conventional camera device, in order to dissipate the heat generated in the cabinet, several new heat dissipating members such as a first heat dissipating piece, a second heat dissipating piece, and a third heat dissipating piece are required. For this reason, the structure is complicated, the device assemblability is deteriorated, and the cost of the product is increased.

The present invention has been made to solve such problems,
In an electronic device having a display unit,
Provided in the housing of the electronic device is provided with a display portion holding portion, which is thermally connected to a heat source in the housing and a part of the surface of the housing is exposed to the outside. The electronic equipment was configured.

  According to this configuration, the heat generated by the heat generation source in the casing of the electronic device is transmitted to the display unit holding unit that is thermally connected to the heat generation source that holds the display unit in the casing, and the surface of the casing The heat is radiated to the outside of the housing from a part of the display part holding part exposed to the outside in at least a part of the display part. For this reason, the display unit holding unit that holds the display unit also serves as a heat radiating unit that radiates heat generated by the heat generation source, and it is not necessary to provide a new heat radiating unit. It is possible to dissipate heat.

  According to the electronic device of the present invention, the heat dissipation performance of the electronic device can be improved with a simple configuration without requiring a new component.

(A), (b) and (c) are the perspective view, the front view, and the rear view of the digital camera by one Embodiment of this invention. (A) is a longitudinal sectional view when the digital camera shown in FIG. 1 is broken along a vertical plane including the optical axis of the lens barrel, and (b) is a horizontal view including the optical axis of the lens barrel. FIG. 4C is a bottom view of the digital camera when the cross section is broken at the plane. (A) is a perspective view of a heat dissipation block engaged with the digital camera shown in FIG. 1, (b) is a bottom view of the heat dissipation block, and (c) is a cross section of the heat dissipation block engaged with the bottom surface of the digital camera. It is a figure which shows the front of a digital camera. 6 shows a digital camera according to a modification of the present embodiment, wherein (a) is a cross-sectional view taken along a horizontal plane including the optical axis of the lens barrel, and (b) is engaged with a side surface of the digital camera. It is a front view of a heat dissipation block and a digital camera.

  Next, an embodiment of the present invention when the electronic apparatus according to the present invention is applied to a digital camera will be described.

  FIGS. 1A, 1B, and 1C are a perspective view, a front view, and a rear view of a digital camera 1 according to this embodiment.

  On the upper surface of the housing 2 of the digital camera 1, a power switch 3 for operating the power supply to the digital camera 1 is provided as shown in FIG. Next to the power switch 3, a release button 4 that is operated when photographing a subject is provided. The housing 2 includes a front cover 2a and a rear cover 2b, and has a substantially rectangular parallelepiped shape.

  As shown in FIGS. 1A and 1B, a lens barrel 5 for photographing is provided on the front surface of the digital camera 1, and an image sensor 21 is built in the back surface of the lens barrel 5. The lens barrel 5 is configured to be movable from the retracted position to a predetermined protruding position. A flash window 6 is provided in the front cover 2 a on the upper right side of the lens barrel 5. At the time of shooting, flash light is emitted toward the subject from the light emitting unit provided in the housing 2 through the flash window 6 as necessary.

  A liquid crystal monitor 7 is provided on the back of the digital camera 1 as shown in FIG. The liquid crystal monitor 7 includes an LCD (Liquid Crystal Display) or the like, and constitutes a display unit that displays a photographed image or the like. On the right side of the liquid crystal monitor 7, a multi-selector 8 is provided for performing a menu item selection operation on the menu screen. The multi-selector 8 is composed of a direction key 8a and an enter button 8b. The direction key 8 a is pressed down in the up / down / left / right direction or rotated in the circumferential direction when the photographer selects an item to be set on the menu screen displayed on the liquid crystal monitor 7. The decision button 8b is pressed when the photographer decides the item selected by operating the direction key 8a.

  A mode button 9, a menu button 10, a playback display button 11, and an erase button 12 are provided around the multi selector 8. The mode button 9 is operated when displaying the shooting mode selection screen on the liquid crystal monitor 7, and the menu button 10 is operated when displaying the menu screen on the liquid crystal monitor 7. The playback display button 11 is operated when the captured image is reproduced and displayed on the liquid crystal monitor 7, and the delete button 12 is operated when the captured image is deleted. Above the mode button 9, a moving image shooting button 13 is provided. The moving image shooting button 13 is operated when starting moving image shooting.

  2A is a vertical cross-sectional view of the digital camera 1 shown in FIG. 1 taken along a vertical plane including the optical axis A of the lens barrel 5, and FIG. 2B shows the digital camera 1 as a lens mirror. FIG. 2C is a bottom view of the digital camera 1 when the horizontal plane including the optical axis A of the tube 5 is broken. In the figure, the same parts as those in FIG.

  Subject light passes through the lens barrel 5 provided on the front side of the image sensor 21 and enters the image sensor 21. The imaging element 21 captures a subject image with incident subject light under the control of an electrical element 24 having a CPU (Central Processing Unit) provided on the circuit board 23. The image sensor 21 and the electric element 24 are heat sources that generate heat when activated. When moving image shooting is started by the moving image shooting button 13, the image sensor 21 and the electric element 24 generate more heat. Inside the housing 2, there is provided a liquid crystal holding unit 22 that is in contact with the rear surface of the imaging element 21 and the front surface of the electric element 24 and is thermally connected to a heat generation source. The liquid crystal holding unit 22 is manufactured by bending a sheet metal, die casting, or the like, and is provided in the housing 2 to constitute a display unit holding unit that holds the liquid crystal monitor 7. Conventionally, the liquid crystal holding part 22 is made of stainless steel having poor heat dissipation (thermal conductivity), but in the present embodiment, the liquid crystal holding part 22 is made of a member having excellent heat dissipation such as pure aluminum, magnesium, pure silver, or copper. .

  A part of the liquid crystal holding part 22 is exposed to the outside at a part of the bottom surface of the housing 2 as shown in FIGS. Further, a part of the front cover 2a and the rear cover 2b is in contact with the liquid crystal holding part 22 on the bottom surface and both side surfaces of the housing 2, as shown in FIGS. The front cover 2 a and the rear cover 2 b that are in contact with and thermally connected to the liquid crystal holding part 22 are made of a member having excellent heat dissipation similar to the liquid crystal holding part 22.

  An exposed portion of the liquid crystal holding portion 22 on the bottom surface of the housing 2 is provided with a female screw 26 into which a tripod mounting screw is screwed. A battery 25 is stored in the battery chamber inside the housing 2, and a battery lid 27 and a USB (Universal Serial Bus) connector 28 are provided on the bottom surface of the housing 2 to cover the opening of the battery chamber. ing. The battery 25 supplies power to various circuits of the digital camera 1. The USB connector 28 is connected to an external device such as a personal computer (personal computer), for example, and image data stored in the digital camera 1 is transferred to the personal computer.

  3A is a perspective view of the heat dissipation block 31 engaged with the digital camera 1, FIG. 3B is a bottom view of the heat dissipation block 31, and FIG. 3C is an engagement with the bottom surface of the digital camera 1. It is a figure which shows the cross section of the heat dissipation block 31 and the front of the digital camera 1. In the figure, the same parts as those in FIG.

  The heat dissipating block 31 is made of a lump of metal members having excellent heat dissipating properties similar to the liquid crystal holding part 22. In the present embodiment, the heat dissipation block 31 has a U-shaped cross section, but the shape is not limited to the U-shaped. A male screw 32 is inserted into the hole formed in the central portion of the heat dissipation block 31. The male screw 32 is provided with a knob 32 a at the head, and the tip of the male screw 32 projects from the upper surface side of the heat dissipation block 31 and is attached to the heat dissipation block 31.

  As shown in FIG. 5C, when attaching the heat dissipation block 31 to the bottom surface of the digital camera 1, the knob 32a is rotated and the male screw 32 of the heat dissipation block 31 is screwed into the female screw 26 on the bottom surface of the digital camera 1. By doing so, the heat dissipation block 31 is engaged with the bottom surface of the digital camera 1. The female screw 26 on the bottom surface of the digital camera 1 constitutes an engaging portion that allows the exposed portion of the liquid crystal holding portion 22 exposed to the outside of the housing 2 and the heat dissipation block 31 to be detachably contacted.

  According to the digital camera 1 according to the present embodiment as described above, the heat generated in the imaging element 21 and the electric element 24 that are heat sources in the casing 2 of the digital camera 1 holds the liquid crystal monitor 7 in the casing 2. The liquid crystal holding part 22 is transmitted through the liquid crystal holding part 22 thermally connected to the heat source and exposed to the outside at a part of the bottom surface of the housing 2 as shown in FIGS. Heat is radiated from the outside to the outside. In this way, the liquid crystal holding part 22 that holds the liquid crystal monitor 7 also serves as a heat radiating part, and it is possible to radiate the heat generated by the heat source without newly providing the heat radiating part. As a result, the heat dissipation performance of the digital camera 1 can be improved with a simple structure without requiring new parts.

  Further, according to the digital camera 1 of the present embodiment, since the liquid crystal holding unit 22 is made of a member having excellent heat dissipation, the heat generated by the heat generation source is efficiently enclosed from the liquid crystal holding unit 22 exposed to the outside. Heat is dissipated to the outside of the body 2 to increase the heat dissipation effect.

  Further, according to the digital camera 1 according to the present embodiment, the casing 2 is made of a member having excellent heat dissipation, and the liquid crystal holding unit 22 and the bottom surface and both side surfaces thereof as shown in FIGS. 2 (a) and 2 (b). Thermally coupled. For this reason, the heat generated by the heat generation source is transmitted through the liquid crystal holding unit 22 and is radiated from a part of the liquid crystal holding unit 22 exposed to the outside on the bottom surface of the casing 2, and at the same time, a casing made of a member having excellent heat dissipation. Heat is also radiated from the body 2. Accordingly, since the area of the portion that is radiated by touching the outside air is increased, the heat radiation effect is further enhanced.

  In addition, the digital camera 1 according to the present embodiment includes, as the female screw 26, an engaging portion that makes the exposed portion of the liquid crystal holding portion 22 exposed to the outside on the bottom surface of the housing 2 and the heat dissipation block 31 removably contact. For this reason, by attaching the heat radiating block 31 to the exposed portion of the liquid crystal holding portion 22 with the female screw 26, the heat transferred from the inside of the housing 2 to the exposed portion of the liquid crystal holding portion 22 is efficiently radiated by the heat radiating block 31. The heat dissipation effect is particularly enhanced. Therefore, for example, even when shooting moving images with a particularly large amount of heat generated, the heat dissipation block 31 is attached with the female screw 26, so that a large amount of generated heat can be efficiently dissipated and long-time shooting of movies is possible. Become.

  FIG. 4 shows a digital camera 1 according to a modification of the present embodiment. FIG. 4A is a cross-sectional view taken along the horizontal plane including the optical axis A of the lens barrel 5, and FIG. FIG. 7B is a front view of the heat dissipation block 31 and the digital camera 1 that are engaged with the side surface of the digital camera 1. In the figure, the same or corresponding parts as those in FIGS. 2 and 3 are denoted by the same reference numerals, and the description thereof is omitted.

  In the above-described embodiment, as shown in FIG. 2, the liquid crystal holding unit 22 is configured to be exposed to the outside of the housing 2 on the bottom surface of the digital camera 1, but in this modified example, as illustrated in FIG. As shown, the digital camera 1 is exposed to the outside of the housing 2 on both side surfaces. A female screw (not shown) corresponding to the female screw 26 described above is provided on the exposed portion of the liquid crystal holding unit 22 on the side surface of the digital camera 1.

  As shown in FIG. 2B, when the heat radiation block 31 is attached to the side surface of the digital camera 1, the knob 32a is rotated so that the male screw 32 of the heat radiation block 31 is screwed into the female screw on the side surface of the digital camera 1. Thus, the heat dissipation block 31 is engaged with the side surface of the digital camera 1. For this reason, also in this configuration, as in the above-described embodiment, the heat transmitted from the inside of the housing 2 to the exposed portion of the liquid crystal holding unit 22 is efficiently dissipated by the heat dissipating block 31, and the heat dissipating effect is further enhanced.

  In the above-described embodiment and modification, the front cover 2a and the rear cover 2b that are thermally connected to the liquid crystal holding unit 22 are all composed of members having excellent heat dissipation properties. You may make it the structure which a part consists of a member excellent in heat dissipation.

  In the embodiment and the modification, the liquid crystal holding unit 22 is configured such that a part of the liquid crystal holding unit 22 is exposed to the outside of the housing 2 on the bottom surface or the side surface of the digital camera 1 as shown in FIGS. However, the structure exposed outside may be sufficient as at least one part of the surface of the housing | casing 2 in another location. For example, a configuration in which a part of the upper surface of the housing 2 is exposed to the outside of the housing 2 may be employed. Further, a configuration in which a part of the bottom surface, the side surface, and the top surface is exposed to the outside of the housing 2 may be employed. Further, the liquid crystal holding part 22 may be configured to be exposed to the outside of the housing 2 in its entirety instead of a part thereof.

  Moreover, in the said embodiment and modification, although the digital camera 1 and the thermal radiation block 31 were the structures engaged with the internal thread 26 of the digital camera 1, and the external thread 32 of the thermal radiation block 31, other structures, For example, a structure may be adopted in which the magnets are electromagnetically engaged with each other or the claws are mechanically engaged with each other. Further, the shape of the heat dissipation block 31 is not limited to the shape shown in FIG. 3, and may be a fin shape such as a heat sink.

  In the embodiment and the modification, the heat generation sources that generate heat when operated are the image sensor 21 and the electric element 24. However, the heat generation sources are not limited to these, and other electric circuit portions or mechanical elements are used. It may be activated to generate heat.

  In the embodiment and the modification, the liquid crystal holding unit 22 is configured to be in direct contact with the image sensor 21 and the electric element 24 as illustrated in FIG. The structure which contacts via a heat conductive sheet etc. may be sufficient.

  The display unit of the digital camera 1 is not limited to the liquid crystal monitor 7 including the LCD shown in FIG. 1, but may be an organic EL, for example.

  In the above-described embodiments and modifications, the case where the electronic apparatus according to the present invention is applied to a digital camera has been described. However, other electronic devices including a display unit such as a liquid crystal display such as a mobile phone, a personal computer, a television, and a video camera are described. The same applies to equipment.

DESCRIPTION OF SYMBOLS 1 ... Digital camera 2 ... Housing 2a ... Front cover 2b ... Rear cover 7 ... Liquid crystal monitor 21 ... Imaging element 22 ... Liquid crystal holding part 24 ... Electric element 26 ... Female screw 31 ... Radiation block 32 ... Male screw

Claims (4)

In an electronic device having a display unit,
A display unit that is provided in the casing of the electronic device, holds the display unit, is thermally connected to a heat source in the casing, and a part of the display unit is exposed to the outside in at least a part of the surface of the casing An electronic device provided with a holding part. The electronic device according to claim 1,
The display unit holding unit is made of a member excellent in heat dissipation. The electronic device according to claim 1 or 2,
At least a part of the casing is made of a member excellent in heat dissipation, and is thermally connected to the display unit holding unit. The electronic device according to any one of claims 1 to 3,
An electronic apparatus comprising: an engaging portion that detachably contacts an exposed portion of the display portion holding portion exposed to the outside and a heat dissipation block.

Images