JP2006195319A - Projector - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a projector improved in portability and convenience by housing a power supply cable inside a projector body. <P>SOLUTION: The projector 1 has an exhaust duct 150 exhausting heat generated inside the body of the projector 1 to the outside together with having an opening/closing cover 100 constituting a housing 10 as an external case of the projector 1 and opened/closed, and the power supply cable 20 connected and fixed to the projector 1 and supplying power to the projector 1. The power supply cable 20 is housed inside the exhaust duct 150 by opening the opening/closing cover 100. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a power cable for supplying power to a projector.

  Conventionally, a power cable for supplying power to a projector is separate from the main body of the projector, and when the projector is used, the power cable is connected to an inlet installed in the projector main body. In addition, projectors are becoming smaller and more advanced, and can be used with a projector, and can be used without a connection cable other than a power cable by using a wireless LAN or memory card. It is possible. Japanese Patent Application Laid-Open No. H10-228688 discloses the arrangement and protection of the power cable and the projection lens in the projector main body.

JP 2002-344848 A

  However, even if the projector is downsized and highly functional, when it is carried and used, it is necessary to carry a power cable at least separately from the projector main body, and there is a problem in terms of convenience.

  SUMMARY An advantage of some aspects of the invention is that it provides a projector with improved portability and convenience by accommodating a power cable inside the projector main body.

  In order to achieve the above-described object, the present invention is a projector that projects an image, and exhausts heat generated inside the main body of the projector to the outside of the main body of the projector and constitutes a casing that is an exterior of the projector. An exhaust duct having an openable / closable open / close lid, and a power cable connected to and fixed to the projector and supplying power to the projector. The power cable is accommodated inside the exhaust duct with the open / close lid open. It is characterized by that.

  According to such a projector, the power cable is connected and fixed to the projector, and the opening / closing lid is opened (opening the opening / closing lid), and is accommodated in the exhaust duct. Thereby, when carrying, the projector can be carried with the power cable housed inside the exhaust duct. Therefore, unlike the prior art, it is not necessary to carry the power cable separately from the projector, and the portability and convenience of the projector can be improved. Further, by accommodating the power cable in the space inside the exhaust duct, it is not necessary to newly secure a region for accommodating the power cable inside the projector, and this can be realized by maintaining the current size of the projector. .

  In the projector described above, a lid opening / closing detection unit for detecting opening / closing information of opening / closing of the opening / closing lid, and opening / closing for determining whether the opening / closing lid is open or closed based on the opening / closing information detected by the lid opening / closing detection unit It is preferable to include a determination unit and a power operation control unit that controls an operation for projecting an image and power supply based on a determination result of the open / close determination unit.

  According to such a projector, an operation for projecting an image and power supply are controlled depending on whether the open / close lid is open or closed. Accordingly, it is possible to confirm the discharge of the power cable housed inside the exhaust duct from the exhaust duct. In addition, the opening / closing lid can function as a part constituting the exhaust duct, and the safety of the projector can be ensured.

  In the projector described above, when the open / close determining unit determines that it is closed based on the open / close information detected by the lid open / close detecting unit, the power operation control unit starts an operation for projecting an image and the supply of power. It is preferable to perform control for this purpose.

  According to such a projector, when the opening / closing lid is closed (closing the opening / closing lid), the power operation control unit performs an operation for projecting an image and a control for starting the supply of power. As a result, when the power cable housed in the exhaust duct is not completely discharged, or when the projector is operated and projected in a state where the exhaust leaks from the open / close lid without being completely closed Thus, it is possible to prevent the heating of the power cable due to exhaust heat that may occur in the future, the malfunction of the projector due to defective exhaust, and the like, and the safety of the projector can be ensured.

  In the projector described above, when the open / close determining unit determines that the open is based on the open / close information detected by the lid open / close detecting unit, the power operation control unit stops the operation for projecting an image and the supply of power. It is preferable to perform control for this purpose.

  According to such a projector, when the open / close lid is opened, the power operation control unit performs an operation for projecting an image and a control for stopping the supply of power. Thereby, even if the opening / closing lid is in an open state, it is possible to prevent malfunction of the projector due to exhaust failure that may occur when the projector continues to project images, and thus the safety of the projector can be ensured.

  In the projector described above, the opening / closing lid may be slidably installed on the casing, or may have a part that is rotatably connected to be installed to be opened / closed or detachable. It is preferable to be installed.

  According to such a projector, the opening / closing lid is slidably, opened / closed or detachably installed. Therefore, the structure of the opening / closing lid can be appropriately selected depending on the shape of the projector, the configuration of the exhaust duct, and the like, and the degree of freedom in designing the opening / closing lid in the projector can be improved.

  In the projector described above, it is preferable that the opening / closing lid has a protrusion that presses a power cable housed in the exhaust duct.

  According to such a projector, since the opening / closing lid presses the power cable by the protrusion when the power cable is accommodated inside the exhaust duct, it is possible to prevent the power cable from rattling inside the exhaust duct. . Thereby, it is possible to stably store, carry, move and carry the projector.

  In the projector described above, it is preferable that the opening / closing lid has a protrusion for rectifying the exhaust gas flowing on the inner surface side of the opening / closing lid.

  According to such a projector, since the opening / closing lid rectifies the exhaust gas flowing on the inner surface side of the opening / closing lid by the projection, it is possible to prevent the occurrence of turbulent flow of the exhaust gas that is likely to occur when the opening / closing lid is installed. The exhaust efficiency can be improved.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
(First embodiment)

  FIG. 1 is a schematic perspective view of a projector according to a first embodiment of the present invention, FIG. 1A is a schematic perspective view of the projector in a usable state, and FIG. It is a schematic perspective view in an unused state. The configuration of the appearance of the projector will be described with reference to FIG.

  For the description of the configuration, all the six surfaces that are the external surfaces of the projector 1 are shown as a top surface portion 1a, a front surface portion 1b, a left surface portion 1c, a right surface portion 1d, a back surface portion 1e, and a bottom surface portion 1f.

  As shown in FIG. 1, the exterior of the projector 1 has a substantially rectangular parallelepiped housing 10. The housing 10 includes an upper case 11, a lower case 12, and a front case 13. The upper case 11 constitutes a part of the upper surface portion 1a and the left side surface portion 1c, the right side surface portion 1d, and the back surface portion 1e. The lower case 12 constitutes a part of the bottom surface portion 1f and the left side surface portion 1c, the right side surface portion 1d, and the back surface portion 1e. The front case 13 constitutes the front surface portion 1b.

  An LED (Light Emitting Diode) 32 that notifies an abnormality of the operation unit 30 that operates the operation of the projector 1, the alarm hole 31 for the speaker, and the lamp 211 (see FIG. 2) that is the light source 210 is provided on the upper surface 1a. Etc. are installed. A projection lens 281 for enlarging and projecting an image, an exhaust unit 170 for exhausting heat generated in the main body of the projector 1 (especially heat generated by the lamp 211), a remote controller (hereinafter referred to as a remote controller) are provided on the front unit 1b. ) A remote control light receiving unit 33 for receiving a signal from 800 (see FIG. 3) is installed.

  A power cable 20 that supplies power to the projector 1 is connected to a power supply unit 330 (see FIG. 2) inside the projector 1 and is extended from the housing 10 to the outside on the left side surface 1c. A slidable opening / closing lid 100 is installed beside the power cable 20.

  A handle (not shown) for carrying the projector 1 is provided on the right side surface portion 1d. The back surface 1e has an intake port 34 (see FIG. 2) for taking in outside air that cools the lamp 211, and an image input terminal 345 (see FIG. 3) that is a connection interface for taking in an input signal from the outside. Etc. are provided. In addition, a remote control light receiving unit (not shown) that receives a signal from the remote control 800 is installed in the same manner as the front surface portion 1b. Two types of feet, such as a height-adjustable foot and a fixed foot (both not shown), which fix the projector 1, are installed on the bottom surface portion 1f.

  FIG. 1A is a perspective view showing a state in which the power cable 20 is discharged from the inside of the exhaust duct 150 and the opening / closing lid 100 is closed, and this state is a plug of the power cable 20. This is a state (usable state) when the projector 1 is used by connecting 21 to a commercial power supply port (so-called outlet) prepared on the floor where the projector 1 is installed. Details will be described later.

  FIG. 1B is a perspective view showing a state in which the opening / closing lid 100 is opened, the power cable 20 is accommodated in the space inside the exhaust duct 150, and the opening / closing lid 100 is closed. This is a state when the projector 1 is not used (unused state), and is a state when the projector 1 is stored, carried, moved, transported, or the like. Details will be described later.

  2 is a schematic plan sectional view of the projector, FIG. 2A is a schematic plan sectional view in a usable state, and FIG. 2B is a schematic plan sectional view in an unused state. FIG. 2 (c) is a cross-sectional view taken along line AA in FIG. 2 (b). The internal configuration and operation of the projector 1 will be described with reference to FIG.

  As shown in FIG. 2A, the projector 1 includes an optical engine unit 200 that constitutes an optical system part for projecting an image, a power supply unit 330 that constitutes a power system part, and a circuit that constitutes an electric circuit system. The block 400 includes an exhaust duct 150 that constitutes an exhaust system that exhausts heat generated by the light source 210.

The configuration and operation of the optical engine unit 200 will be briefly described.
The optical engine unit 200 is a unit obtained by housing components constituting the optical system portion in a predetermined place formed in the optical engine case 201. The optical engine unit 200 includes a light source 210, an optical conversion unit 220, and a projection optical system 280. The light source 210 includes a lamp 211, and the projection optical system 280 includes a projection lens 281. The optical conversion unit 220 includes an illumination optical system, a color separation optical system, a color modulation optical system, and a color synthesis optical system.

  The illumination optical system includes lens arrays 221, 222, a polarization conversion element 223, a superimposing lens 224, reflection mirrors 225, 226, 227, 228, a relay lens 229, a field lens 230 (for red), 231 (for green), 232 ( (For blue). The color separation optical system includes dichroic mirrors 240 and 241.

  The color modulation optical system includes a liquid crystal light valve 250. The liquid crystal light valve 250 includes three liquid crystal light valves 250R (for red), 250G (for green), and 250B (for blue).

  With the above configuration, the optical system allows the projection lens 281 to convert the outgoing light emitted from the lamp 211 to the screen 900 or the like via the optical conversion unit 220 that performs optical conversion such as polarization, color separation, modulation, and color synthesis. Performs operations to enlarge and project images.

Here, the operation of the emitted light emitted from the lamp 211 will be described.
The substantially parallel emitted light generated by the light emitted from the lamp 211 is incident on a lens array 221 in which small rectangular lenses are arranged in a matrix, and the incident light is divided and emitted in the direction of the illumination optical axis. The next lens array 222 has substantially the same configuration as the lens array 221, and an image of each small lens of the lens array 221 is formed on the display surface of the liquid crystal light valve 250 together with the superimposing lens 224.

  The polarization conversion element 223 is an element that converts the light emitted from the lens array 222 into one type of polarized light, and is for improving the light utilization rate.

  Light emitted from the superimposing lens 224 is reflected by the reflection mirror 225. Then, color separation is performed by the dichroic mirror 240 constituting the color separation optical system. In the present embodiment, the dichroic mirror 240 transmits the blue light component and reflects the other color light components. The transmitted blue light component is reflected by the reflection mirror 226, enters the field lens 232, and reaches the liquid crystal light valve 250B. Color light components other than the reflected blue light component are again separated by the dichroic mirror 241. In the present embodiment, the dichroic mirror 241 transmits the red light component and reflects the green light component. Then, the reflected green light component enters the field lens 231 and reaches the liquid crystal light valve 250G. The transmitted red light component is transmitted and reflected in the order of the relay lens 229, the reflection mirror 227, the relay lens 229, and the reflection mirror 228, enters the field lens 230, and reaches the liquid crystal light valve 250R.

  Here, the two relay lenses 229 on the optical path of the red light component have a longer optical path length of the red light than the optical path lengths of the other color light components, thereby preventing a decrease in light use efficiency due to light divergence or the like. Do the work. Further, as described above, the dichroic mirrors 240 and 241 perform the function of separating the light emitted from the lamp 211 into three color lights of red light (R), green light (G), and blue light (B).

  The light beam reaching each liquid crystal light valve 250 is modulated by each liquid crystal light valve 250 and emitted. Each emitted color light is color-combined by the cross dichroic prism 260, and the combined emitted light is enlarged and projected by the projection lens 281.

  The power supply unit 330 is installed on the right side of the optical engine unit 200 of the projector 1 in the figure. The power cable 20 is directly connected without going through the inlet. The circuit block 400 is a unit obtained by mounting circuit components on a circuit board, and is mounted and fixed on the upper surface side of the optical engine unit 200.

  The exhaust duct 150 is installed on the left side of the optical engine unit 200 in the figure. The exhaust duct 150 is not composed of one component, but is composed of the upper case 11, the lower case 12, and the opening / closing lid 100 of the housing 10, and the cooling fan 160 and the exhaust part 170 are respectively provided. It is provided on the inlet side and the outlet side of the exhaust duct 150.

  FIG. 2B shows the inside of the projector 1 in an unused state, and this state is a state where the power cable 20 is accommodated in the space inside the exhaust duct 150. The power cable 20 is accommodated by opening the open / close lid 100 and inserting the power cable 20 into the space inside the exhaust duct 150 so that the power cable 20 is folded several times. Finally, the plug 21 is inserted. it can. Then, it will be in an unused state by closing the opening-and-closing lid 100. By adopting such a form, the projector 1 can be stored, carried, moved, transported, and the like.

  FIG. 2C shows an AA cross section of the exhaust duct 150 in the unused state of FIG.

The configuration of the exhaust duct 150 will be described in detail.
The exhaust duct 150 includes an upper surface portion of the upper case 11, a bottom surface portion of the lower case 12, a partition wall 11 a and a partition wall 12 a that protrude from the upper case 11 and the lower case 12, and a left side surface portion and a lower case of the upper case 11. 12 and a groove 11b formed on the left side of the upper case 11 and the lower case 12, and a substantially rectangular parallelepiped space surrounded by the opening / closing lid 100 sandwiched by the groove 12b and sliding on the grooves 11b and 12b. Consists of.

  On the lamp 211 side, which is the inlet side of the exhaust duct 150, a cooling fan is formed by a bottom surface portion, a left side surface portion, and a partition wall 12 a of the lower case 12 that forms the exhaust duct 150, and an upper surface side, left side surface portion, and the partition wall 11 a of the upper case 11. Guide and fix 160. Further, the exhaust duct 150 similarly guides the exhaust part 170 installed in the front case 13 on the outlet side of the exhaust duct 150. A louver 175 is formed in the exhaust unit 170, and the exhaust can be exhausted in a predetermined angular direction.

The cooling operation of the lamp 211 in the exhaust duct 150 will be described.
As shown in FIG. 2A, when the projector 1 is operated, the cooling fan 160 rotates, so that outside air is drawn from the intake port 34 installed in the area opposite to the lamp 211 on the back surface of the housing 10. Inhale. The sucked outside air flows through the side surfaces of the lamp 211 and the inner surface of the lamp 211, and heat is transferred. The outside air heated by heat transfer is exhausted into the exhaust duct 150 by the cooling fan 160. The outside air having heat exhausted by the cooling fan 160 flows through the exhaust duct 150 and is exhausted to the outside of the projector 1 through the louver 175. By repeating the above operation, the heat generated in the lamp 211 can be cooled. The arrows shown in FIG. 2A indicate the flow and direction of the outside air.

  FIG. 3 is a block diagram showing an electrical configuration of the projector. The electrical configuration and operation of the projector 1 will be described with reference to FIG.

  The projector 1 includes a control unit 300, a signal conversion unit 340, an image processing unit 350, a liquid crystal light valve drive unit 360, a lid open / close detection unit 320, a lamp drive unit 380, a fan drive unit 390, a remote control control unit 370, a power supply unit 330, and the like. It is comprised. The control unit 300 includes an open / close determination unit 310 and a power operation control unit 315. The control unit 300, the signal conversion unit 340, the image processing unit 350, and the remote control unit 370 are connected to each other via a bus 300a. Here, the open / close determination unit 310 and the power operation control unit 315 included in the control unit 300 are executed by a program for performing open / close determination and power operation control of the open / close determination unit 310 and the power operation control unit 315 incorporated in the control unit 300. Consists of.

  An image input terminal 345 connected to the signal conversion unit 340 receives an analog image signal supplied from an external image signal supply device (not shown). Note that as the analog image signal, for example, an image input terminal 345 is an image signal such as an RGB signal representing a computer image output from a personal computer or a composite image signal representing a moving image output from a video recorder or a television receiver. To be supplied. The signal conversion unit 340 performs AD conversion on the analog image signal input from the image input terminal 345 and outputs the analog image signal to the image processing unit 350 as a digital image signal (image data).

  The image processing unit 350 performs frame rate conversion and scaling processing on the input image data. The image processing unit 350 also performs various image corrections such as brightness adjustment, contrast adjustment, and gamma correction processing on the image data. The image data processed in this way is output to the liquid crystal light valve driving unit 360 as a projection video signal.

  The liquid crystal light valve driving unit 360 drives the liquid crystal light valve 250 (250R, 250G, 250B) based on the projection video signal input from the image processing unit 350.

  The lamp driving unit 380 supplies power for causing the lamp 211 that is the light source 210 to emit light based on a signal from the control unit 300.

  The fan driving unit 390 rotates the cooling fan 160 based on the signal from the control unit 300 to cool the heat generated by the lamp 211.

  Remote control control unit 370 outputs a signal for controlling the function of each unit of projector 1 based on the operation signal input from remote control 800.

  In this embodiment, the lid opening / closing detection unit 320 is configured using a micro switch 321 (see FIG. 4) as a detection sensor, and outputs opening / closing information of opening / closing of the opening / closing lid 100 to the control unit 300. Details will be described later.

  The control unit 300 performs overall control of the projector 1. Also, a program as an open / close determination unit 310 that receives open / close information from the lid open / close detection unit 320 and determines whether the open / close lid 100 is open or closed is executed, and an image is displayed on the projector 1 based on the result. A program as the power operation control unit 315 for controlling the operation for projecting and the supply of power is executed.

  The power supply unit 330 supplies power for operating the projector 1. Further, the operation of starting and stopping the supply of power to the light source 210 is performed according to a signal from the power operation control unit 315.

  The operations of the lid opening / closing detection unit 320, the opening / closing determination unit 310, and the power operation control unit 315 in the present embodiment will be described in detail. The installation position of the lid opening / closing detection unit 320 and the structure of the opening / closing lid 100 will be described with reference to FIG.

  When the open / close lid 100 is closed, the micro switch 321 serving as the lid open / close detection unit 320 is turned “ON”. The signal is input to the open / close determination unit 310 included in the control unit 300. When the opening / closing determination unit 310 determines that the opening / closing lid 100 is closed, the signal is output to the power operation control unit 315. Based on the signal from the open / close determination unit 310, the power operation control unit 315 performs processing so as to be in a state of accepting an operation on the operation unit 30 for turning on the lamp 211. Accordingly, when an operation input for lighting the lamp 211 is performed by the operation unit 30, the power operation control unit 315 starts supplying power for lighting the lamp 211 to the power source unit 330 based on the signal. Outputs a signal to

  When the opening / closing lid 100 is opened, the micro switch 321 serving as the lid opening / closing detection unit 320 is turned “OFF”. The signal is input to the open / close determination unit 310 included in the control unit 300. When the opening / closing determination unit 310 determines that the opening / closing lid 100 is opened, the signal is output to the power operation control unit 315. Based on the signal from the open / close determination unit 310, the power operation control unit 315 performs processing so as not to accept an operation on the operation unit 30 for turning on the lamp 211. In addition, the power operation control unit 315 outputs a signal for causing the power supply unit 330 to stop supplying power for turning on the lamp 211. As a result, even if an operation input for lighting the lamp 211 is performed by the operation unit 30, the power operation control unit 315 does not accept the signal, and a signal for supplying power for lighting the lamp 211 is also received. Do not output.

  With the above operation, when the user discharges the power cable 20 from the exhaust duct 150 and connects the plug 21 to the outlet, or closes the open / close lid 100, the operation signal for lighting the lamp 211 is used. The lighting of the lamp 211 can be started. In addition, when the opening / closing lid 100 is open, even if an operation for lighting the lamp 211 is performed, the lighting of the lamp 211 cannot be started. Further, when the opening / closing lid 100 is accidentally opened while the projector 1 is in use, the lighting of the lamp 211 is stopped.

  FIG. 4 is a view showing an open / close lid slidably installed on the projector, FIG. 4 (a) is a perspective view showing a state in which the open / close lid is opened, and FIG. 4 (b) is an open / close lid. It is a side view which shows the state by which the lid | cover was obstruct | occluded. The configuration and operation of the opening / closing lid 100 will be described with reference to FIG.

  The opening / closing lid 100 has a substantially rectangular shape, and a hooking portion 120 for hooking is formed on the tip side with a claw 121. Further, a pressing portion 130 for operating the microswitch 321 is formed so as to protrude to the tip side. Further, the sliding portions 110a and 110b for holding the opening / closing lid 100 by being held by the groove portions 11b and 12b (see FIG. 2C) formed in the housing 10 are sectional shapes of the groove portions 11b and 12b. Accordingly, the upper and lower edges of the opening / closing lid 100 are formed to project. In addition, when the power cable 20 is accommodated in the exhaust duct 150, a notch 140 serving as a relief groove of the power cable 20 is formed in a substantially circular shape at the tip of the opening / closing lid 100 according to the cable diameter of the power cable 20. Forming. In addition, a gripping portion 145 for a user to grip when opening / closing the lid 100 slides is formed on the side surface of the opening / closing lid 100 so as to have a planar elliptical uneven shape.

  The upper case 11 and the lower case 12 constituting the housing 10 are respectively formed with openings 11c and 12c to form an opening 15 serving as an entrance when the power cable 20 is accommodated. Moreover, as shown in FIG.2 (c), the groove parts 11b and 12b used as the guide groove for sliding the opening-and-closing lid | cover 100 are formed. A micro switch 321 is disposed on the inner surface of the upper case 11. On the inner surface side of the lower case 12, a hooked portion 12 d for hooking a claw 121 of the hooking portion 120 formed on the opening / closing lid 100 and fixing the opening / closing lid 100 is formed. Here, the micro switch 321 has a main body 321a and a cylindrical movable shaft 321b, and outputs an “ON” or “OFF” signal when the movable shaft 321b moves relative to the main body 321a.

With the above configuration, the opening / closing lid 100 can slide with respect to the housing 10.
An operation until the opening / closing lid 100 is opened, the power cable 20 is accommodated, and the opening / closing lid 100 is closed will be described.
First, the grasping portion 145 is grasped, and a certain amount of force is applied in the opening direction to slide the opening / closing lid 100. Thereby, the nail | claw 121 of the hook part 120 remove | deviates from the to-be-hooked part 12d, and the opening-and-closing lid 100 opens. Then, the power cable 20 is housed in the exhaust duct 150 from the opening 15. Next, the cable of the power cable 20 is set in accordance with the notch portion 140, the grip portion 145 is gripped, a force is applied in a direction to close the open / close lid 100, and the open / close lid 100 is slid. Thereby, the nail | claw 121 of the hook part 120 is hooked on the to-be-hooked part 12d, is latched, and the opening-and-closing lid 100 is obstruct | occluded. When the power cable 20 is discharged from the inside of the exhaust duct 150, the opening / closing lid 100 is similarly slid to be opened, and after the power cable 20 is discharged, it is similarly slid to be closed.

  When closing the opening / closing lid 100, as shown in FIG. 4B, the opening / closing lid 100 is attached to the housing 10 by the hook 121 being hooked on the hooked portion 12 d and being locked. Fixed. At the same time, the tip 131 of the pressing part 130 presses the tip of the movable shaft 321b of the micro switch 321 and pushes it into the main body 321a by the movement amount A. As a result, the micro switch 321 changes from “OFF” to “ON” and outputs an “ON” signal. When the opening / closing lid 100 is opened, the micro switch 321 changes from “ON” to “OFF” and outputs an “OFF” signal.

  Note that the opening / closing lid 100 functions as the exhaust duct 150 by being closed. Specifically, when the opening / closing lid 100 is closed and the opening 15 is closed, outside air (exhaust) having heat transferred from the lamp 211 flows through the inside of the exhaust duct 150 without leaking from the opening 15. Then, the air can be exhausted from the exhaust unit 170 to the outside of the projector 1.

According to the first embodiment described above, the following effects can be obtained.
(1) According to the present embodiment, the projector 1 can be carried by accommodating the power cable 20 in the exhaust duct 150 having the slidable opening / closing lid 100. Therefore, it is not necessary to carry the power cable separately from the projector as in the prior art. Further, since the power cable 20 is accommodated in the space inside the exhaust duct 150, an area for accommodating the power cable 20 is newly provided in the projector 1. Since it can be realized by maintaining the current size of the projector, it is possible to improve the portability and convenience of the projector.

  (2) According to the present embodiment, since the lid opening / closing detection unit 320, the opening / closing determination unit 310, and the power operation control unit 315 are included, the case where the opening / closing lid 100 is open and the case where it is closed Then, the operation for projecting the image on the projector 1 and the power supply are controlled. As a result, it is possible to confirm the discharge of the power cable 20 accommodated in the exhaust duct 150 from the exhaust duct 150. In addition, the opening / closing lid 100 can function as a part constituting the exhaust duct 150 and the safety of the projector 1 can be ensured.

  Specifically, when the open / close lid 100 is closed, the power operation control unit 315 performs an operation for projecting an image and a control for starting the supply of power. When the open / close lid 100 is open, the power operation control unit 315 performs an operation for projecting an image and a control for stopping the supply of power. Thus, the projector 1 is operated when the power cable 20 accommodated in the exhaust duct 150 is not completely discharged or when the exhaust lid leaks from the open / close lid 100 without being completely closed. It is possible to prevent heating of the power cable 20 due to exhaust heat that may occur when the projector 1 is operated and projected, and malfunction of the projector 1 due to exhaust failure. Further, even if the opening / closing lid 100 is opened, it is possible to prevent malfunction of the projector 1 due to exhaust failure that may occur when the projector 1 continues to project images.

(Second Embodiment)
Next, 2nd Embodiment of this invention is described based on drawing.

  FIG. 5 is a cross-sectional view showing an opening / closing lid that has a portion that is rotatably connected to the projector according to the second embodiment of the present invention and that is installed to be openable and closable. FIG. 5B is a diagram illustrating a state in which the opening / closing lid is opened, and FIG. 5C is a diagram illustrating a state in which the opening / closing lid is closed. It is sectional drawing which shows an opening / closing detection part. The configuration and operation of the opening / closing lid 500 will be described with reference to FIG. Note that components similar to those in the first embodiment are denoted by symbols similar to those in the first embodiment.

  As shown in FIGS. 5A and 5B, the opening / closing lid 500 has a substantially rectangular shape like the opening / closing lid 100, and one end is an inner surface of the housing 10 (upper case 11 and lower case 12). At the position of the concave portion 16 formed on the side, a rotation portion 510 serving as a portion that is rotatably connected around the rotation shaft 511 is formed. At the other end, a locking portion 520 having a substantially U-shaped cross section has a claw 521 and a grip portion 522, and is formed at one location in the center of the end surface of the opening / closing lid 500. In addition, a protrusion 530 protruding from the opening / closing lid 500 is formed on the inner surface side of the opening / closing lid 500. Although not shown, like the opening / closing lid 100, when the power cable 20 is accommodated in the exhaust duct 150, a notch that becomes a relief groove of the power cable 20 is matched to the cable diameter of the power cable 20, The end face of the opening / closing lid 500 is formed in a substantially circular shape. Further, as shown in FIG. 5C, the opening / closing lid 500 is formed with a pressing portion 540 for operating the microswitch 322 protruding.

  The upper case 11 and the lower case 12 constituting the housing 10 are respectively formed with recesses 16, 17, and 18 formed without buffering with the rotating portion 510, the locking portion 520, and the protruding portion 530 of the opening / closing lid 500. , Each constitutes an opening 19 serving as an entrance when the power cable 20 is accommodated. Further, a buffer member 700 for preventing exhaust leakage due to the generation of a gap between the tip of the opening 19 and the opening / closing lid 500 when the opening / closing lid 500 is closed is provided at the tip of the opening 19. It is attached. In addition, a micro switch 322 is installed in the concave portion 18 at a position facing the pressing portion 540. Similar to the first embodiment, the micro switch 322 includes a main body 322a and a columnar movable shaft 322b, and the movable shaft 322b is moved with respect to the main body 322a to be “ON” or “OFF”. Output a signal.

With the above-described configuration, the opening / closing lid 500 is pivotally connected to the housing 10 about the rotation shaft 511, and can be opened and closed.
The operation until the opening / closing lid 500 is opened, the power cable 20 is accommodated, and the opening / closing lid 500 is closed will be described.
First, by gripping the gripping portion 522 formed on the locking portion 520 and moving it in the direction shown by the arrow, the locking portion 520 is distorted and the claw 521 is displaced from the opposite position of the concave portion 17. Then, the opening / closing lid 500 is opened. Then, the power cable 20 is housed in the exhaust duct 150 from the opening 19. Next, the cable of the power cable 20 is set in accordance with the notch, the opening / closing lid 500 is rotated around the rotation shaft 511, and the claw 521 of the locking portion 520 is positioned on the opposing surface of the recess 17. At this time, by applying a force in the direction of closing the opening / closing lid 500, the locking portion 520 is distorted, and the claw 521 is positioned on the opposing inner surface of the concave portion 17 and locked. Thereby, the opening / closing lid 500 is closed and fixed to the housing 10. At this time, the inner surface portion of the opening / closing lid 500 is fixed in a state where the buffer member 700 attached to the opening portion 19 is pressed. In this embodiment, a rubber cushion material is used as the buffer member 700. When the power cable 20 is discharged from the inside of the exhaust duct 150, the opening / closing lid 500 is similarly opened, and after the power cable 20 is discharged, it is similarly closed.

  When closing the opening / closing lid 500, as shown in FIG. 5C, the opening / closing lid 500 is fixed to the housing 10 by being locked to the housing 10 by the claw 521 of the locking portion 520. . At the same time, the distal end 541 of the pressing portion 540 presses the distal end of the movable shaft 322b of the micro switch 322, and pushes it into the main body 322a by the movement amount B. As a result, the micro switch 322 changes from “OFF” to “ON” and outputs an “ON” signal. When the opening / closing lid 500 is opened, the micro switch 322 changes from “ON” to “OFF” and outputs an “OFF” signal.

  The opening / closing lid 500 functions as the exhaust duct 150 by closing. Specifically, the open / close lid 500 is closed and the buffer member 700 of the opening 19 is pressed and closed, so that the outside air (exhaust) having heat transferred from the lamp 211 does not leak from the opening 19. The exhaust duct 150 can be circulated and exhausted from the exhaust unit 170 to the outside of the projector 1.

  Further, when the power cable 20 is accommodated inside the exhaust duct 150 by the protrusion 530 formed on the inner surface side of the opening / closing lid 500 and the opening / closing lid 500 is closed, the protrusion 530 accommodates the power cable 20 accommodated therein. Press. As a result, the power cable 20 is sandwiched between the partition wall 11a of the upper case 11 and the partition wall 12a of the lower case 12 and the protrusions 530 constituting the exhaust duct 150, and there is no backlash inside the exhaust duct 150.

  Further, a protrusion 530 formed on the inner surface side of the opening / closing lid 500 is formed so as to protrude by an amount equivalent to the amount of protrusion of the recesses 16, 17, 18 constituting the opening 19 into the exhaust duct 150. Therefore, the occurrence of turbulent flow of the outside air flowing through the exhaust duct 150 is prevented by eliminating asperities on the inner surface side periphery of the open / close lid 500 as much as possible, as shown by arrows (two-dot chain lines) in FIG. In addition, rectification is performed.

According to the second embodiment described above, the effects (1) and (2) of the first embodiment can be obtained in the same manner, and the following effects can be obtained.
(1) According to the second embodiment, when the power cable 20 is accommodated inside the exhaust duct 150 by forming the protrusion 530 on the opening / closing lid 500, the power cable 20 is pressed by the protrusion 530. Thus, rattling of the power cable 20 inside the exhaust duct 150 can be prevented. Thereby, storage, carrying, movement, and transportation of the projector 1 can be performed stably.

  (2) According to the second embodiment, when the opening / closing lid 500 is installed to rectify the outside air (exhaust gas) flowing on the inner surface side of the opening / closing lid 500 by forming the protrusion 530 on the opening / closing lid 500. Therefore, it is possible to prevent the turbulent flow of the exhaust gas from being easily generated, and to improve the exhaust efficiency.

(Third embodiment)
Next, 3rd Embodiment of this invention is described based on drawing.

  FIG. 6 is a view showing an opening / closing lid that is detachably installed in a projector according to a third embodiment of the present invention, and FIG. 6A is a sectional view showing a state in which the opening / closing lid is closed. FIG. 6B is a perspective view showing a state where the opening / closing lid is opened, and FIG. 6C is a cross-sectional view showing the lid opening / closing detection unit in a state where the opening / closing lid is closed. The configuration and operation of the opening / closing lid 600 will be described with reference to FIG. Note that components similar to those in the first embodiment are denoted by symbols similar to those in the first embodiment.

  As shown in FIGS. 6A and 6B, the opening / closing lid 600 has a substantially rectangular shape, like the opening / closing lid 100, and has hooking portions 610 for hooking and holding at both ends in the longitudinal direction. , 611 are formed with claws 610a, 611a. In addition, a grip portion 620 that is gripped when the opening / closing lid 600 is attached / detached is formed at the center of the four sides of the opening / closing lid 600. The holding part 620 has a shape obtained by cutting a dome shape. In addition, a protrusion 630 protruding from the opening / closing lid 600 is formed on the inner surface side of the opening / closing lid 600. Further, a pressing portion 640 for operating the micro switch 323 is formed so as to protrude. Further, similarly to the opening / closing lid 100, a notch 650 is formed.

  Openings 41 and 42 are formed in the upper case 11 and the lower case 12 constituting the housing 10 to form an opening 40 serving as an entrance when the power cable 20 is accommodated. Further, hooked portions 43 and 44 for hooking the claws 610a and 611a of the hook portions 610 and 611 are formed on the inner surface side of the housing 10 corresponding to the hook portions 610 and 611. A receiving portion 45 for installing the microswitch 323 is formed in the upper case 11. Here, the micro switch 323 has a main body 323a and a columnar movable shaft 323b, and outputs an “ON” or “OFF” signal when the movable shaft 323b moves relative to the main body 323a.

With the above configuration, the opening / closing lid 600 is detachable from the housing 10.
An operation until the opening / closing lid 600 is opened, the power cable 20 is accommodated, and the opening / closing lid 600 is closed will be described.
First, one of the grip portions 620 formed on the four sides of the opening / closing lid 600 is gripped and pulled toward the outside of the projector 1. Accordingly, the claws 610a and 611a of the hooking portions 610 and 611 of the opening and closing lid 600 are detached from the hooked portions 43 and 44, and the opening and closing lid 600 is detached (opened) from the projector 1. Then, the power cable 20 is accommodated in the exhaust duct 150 from the opening 40. Next, the power cable 20 is set in accordance with the notch 650, the grip 620 is gripped, a force is applied in the direction in which the open / close lid 600 is attached, and the open / close lid 600 is inserted from the opening 40. As a result, the claws 610a and 611a of the hooking portions 610 and 611 are hooked on the hooked portions 43 and 44 and locked, and the opening / closing lid 600 is attached (closed). When the power cable 20 is discharged from the inside of the exhaust duct 150, the opening / closing lid 600 is similarly opened, and after the power cable 20 is discharged, it is similarly closed.

  When closing the opening / closing lid 600, as shown in FIG. 6C, the claws 610a, 611a of the hooking portions 610, 611 are hooked on the hooked portions 43, 44 and are locked, thereby opening and closing the lid. 600 is fixed to the housing 10. At the same time, the tip 641 of the pressing portion 640 presses the tip of the movable shaft 323b of the micro switch 323 and pushes it into the main body 323a by the movement amount C. As a result, the micro switch 323 changes from “OFF” to “ON” and outputs an “ON” signal. When the opening / closing lid 600 is opened, the micro switch 323 changes from “ON” to “OFF” and outputs an “OFF” signal.

  The opening / closing lid 600 functions as the exhaust duct 150 by being closed. Specifically, when the opening / closing lid 600 is closed and the opening 40 is closed, the outside air (exhaust) having heat transferred from the lamp 211 flows through the inside of the exhaust duct 150 without leaking from the opening 40. Then, the air can be exhausted from the exhaust unit 170 to the outside of the projector 1.

  Further, when the power cable 20 is accommodated inside the exhaust duct 150 by the protrusion 630 formed on the inner surface side of the opening / closing lid 600 and the opening / closing lid 600 is closed, the protrusion 630 receives the power cable 20 accommodated therein. Press. As a result, the power cable 20 is sandwiched between the partition wall 11a of the upper case 11 and the partition wall 12a of the lower case 12 and the protrusions 630 constituting the exhaust duct 150, and there is no backlash inside the exhaust duct 150.

  In addition, since the protrusion 630 formed on the inner surface side of the opening / closing lid 600 is formed so as to project an amount equivalent to the amount of the hooked portions 43 and 44 projecting into the exhaust duct 150, the opening / closing lid 600. As a result, the turbulent flow of the outside air flowing through the exhaust duct 150 is prevented, and the rectification occurs as shown by the arrows (two-dot chain lines) in FIG. I am doing so.

  According to the third embodiment described above, the effects (1) and (2) in the first embodiment and the effects (1) and (2) in the second embodiment can be obtained similarly. Further, according to the first to third embodiments, the slidable opening / closing lid 100, the opening / closing lid 500, and the detachable opening / closing lid 600 can be provided. Depending on the configuration of the exhaust duct 150 and the like, the structure of the opening / closing lid can be appropriately selected, and the degree of freedom in designing the opening / closing lid in the projector 1 can be improved.

  In addition, this invention is not limited to embodiment mentioned above, A various change, improvement, etc. can be added. A modification will be described below.

  (Modification 1) In the embodiment, the power operation control unit 315 performs an operation for projecting an image and a control for starting the supply of power when the opening / closing lids 100, 500, and 600 are closed. When it is open, an operation for projecting an image and a control for stopping the supply of power are performed. At this time, the projector 1 may be provided with a display unit composed of a liquid crystal panel or the like to display the contents of control. Thereby, it is possible to make the user confirm the current situation and to take appropriate measures. Further, the current status may be notified to the user by lighting or blinking by the LED 32 or by notifying through a speaker (not shown) installed in the projector 1.

  (Modification 2) In the above-described embodiment, the projection 530 formed on the opening / closing lid 500 and the projection 630 formed on the opening / closing lid 600 have both functions of pressing the power cable 20 and rectifying the exhaust. ing. However, it is also possible to have one of these functions.

  (Modification 3) In the above embodiment, the notch 140 is formed in the opening / closing lid, and the power cable 20 is guided when the opening / closing lid is closed. However, the present invention is not limited to this, and a notch may be formed in the housing 10. In addition, the hooks 120, 610, 611 and the locking portions 520 for fixing the opening / closing lids 100, 500, 600 to the housing 10 have various fixing structures in addition to the structure employed in the present embodiment. It is good to adopt. For example, a slide portion provided with a slide mechanism may slide on the open / close lid to fix the open / close lid, or may be fixed using magnetism.

  (Modification 4) The projector 1 in the above embodiment is a transmissive liquid crystal projector. However, the present invention is not limited to this, and a projector adopting a DLP (registered trademark) (Digital Light Processing) method, a LCOS (Liquid Crystal On Silicon) method that is a reflective liquid crystal method, or the like may be used.

FIG. 1 is a schematic perspective view of a projector according to a first embodiment of the present invention, FIG. 1A is a schematic perspective view in a usable state of the projector, and FIG. 1B is an unused state of the projector. FIG. FIG. 2A is a schematic plan sectional view of the projector, FIG. 2A is a schematic plan sectional view in a usable state, and FIG. 2B is a schematic plan sectional view in an unused state. FIG. 2C is a cross-sectional view taken along line AA in FIG. It is a block diagram which shows the electric constitution of a projector. FIG. 4A is a perspective view showing a state in which the open / close lid is opened, and FIG. 4B is a view in which the open / close lid is closed. It is a side view which shows the state. FIG. 5A is a cross-sectional view showing an opening / closing lid that is pivotally connected to a projector according to a second embodiment of the present invention and that is openably / closably installed. FIG. 5 (b) is a diagram illustrating a state in which the opening / closing lid is opened, and FIG. 5 (c) is a diagram illustrating the lid opening / closing detection unit in a state in which the opening / closing lid is closed. It is sectional drawing shown. FIG. 6A is a view showing an opening / closing lid that is detachably installed in a projector according to a third embodiment of the present invention, and FIG. 6A is a sectional view showing a state in which the opening / closing lid is closed; FIG. 6B is a perspective view illustrating a state in which the opening / closing lid is opened, and FIG. 6C is a cross-sectional view illustrating the lid opening / closing detection unit in a state in which the opening / closing lid is closed.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Projector, 10 ... Housing | casing, 11 ... Upper case, 11a ... Partition, 11b ... Groove, 12 ... Lower case, 12a ... Partition, 12b ... Groove, 12d ... Hook part, 13 ... Front case, 15 ... Opening , 16 to 18: recess, 19 ... opening, 20 ... power cable, 21 ... plug, 30 ... operation part, 31 ... alarm hole, 32 ... LED, 33 ... remote control light receiving part, 34 ... air inlet, 40 ... Opening, 43, 44 ... Hook, 45 ... Receiving, 100, 500, 600 ... Opening / closing lid, 110a ... Sliding part, 120, 610, 611 ... Hook, 130 ... Pressing part, 140 ... Notch 145 ... gripping part, 150 ... exhaust duct, 160 ... cooling fan, 170 ... exhaust part, 200 ... optical engine unit, 210 ... light source, 211 ... lamp, 220 ... optical conversion part, 250 ... liquid crystal light valve, 280 ... Throw Optical system 281 Projection lens 300 Control unit 310 Open / close determination unit 315 Power operation control unit 320 Cover open / close detection unit 321-323 Micro switch 330 Power supply unit 340 Signal conversion unit 345: Image input terminal, 350: Image processing unit, 360: Liquid crystal light valve driving unit, 370 ... Remote control unit, 380 ... Lamp driving unit, 390 ... Fan driving unit, 400 ... Circuit block, 510 ... Rotating unit, 511 ... Rotating shaft, 520 ... Locking part, 522 ... Grip part, 530 ... Projection part, 540 ... Pressing part, 620 ... Gripping part, 630 ... Projection part, 640 ... Pressing part, 650 ... Notch part, 700 ... Buffer Member, 800 ... remote control.

Claims (9)

A projector for projecting images,
Exhaust duct having an open / close lid that constitutes a casing that is an exterior of the projector and that can be opened and closed while exhausting heat generated inside the projector main body to the outside of the projector main body,
A power cable that is connected and fixed to the projector and supplies power to the projector;
The projector according to claim 1, wherein the power cable is accommodated in the exhaust duct with the opening / closing lid open. The projector according to claim 1,
A lid opening / closing detector for detecting opening / closing information of opening and closing of the opening / closing lid;
An open / close determination unit that determines whether the open / close lid is open or closed based on the open / close information detected by the lid open / close detection unit;
A projector comprising: a power operation control unit that controls an operation for projecting an image on the projector and power supply based on a determination result of the open / close determination unit. The projector according to claim 2,
Based on the opening / closing information detected by the lid opening / closing detection unit, when the opening / closing determination unit determines that the cover is closed, the power operation control unit starts an operation for projecting an image and supply of power. A projector characterized by controlling the above. The projector according to claim 2,
Based on the opening / closing information detected by the lid opening / closing detection unit, when the opening / closing determination unit determines that it is open, the power operation control unit stops the operation for projecting the image and the supply of power. A projector characterized by controlling the above. The projector according to any one of claims 1 to 4, wherein
The projector is characterized in that the opening / closing lid is slidably installed with respect to the casing. The projector according to any one of claims 1 to 4, wherein
The projector is characterized in that the opening / closing lid has a portion that is rotatably connected to the casing, and is installed to be opened and closed. The projector according to any one of claims 1 to 4, wherein
The projector is characterized in that the opening / closing lid is detachably installed on the casing. The projector according to claim 6 or 7, wherein
The projector according to claim 1, wherein the opening / closing lid has a protrusion that presses the power cable housed in the exhaust duct. The projector according to claim 6 or 7, wherein
The projector according to claim 1, wherein the opening / closing lid has a protrusion that rectifies the exhaust flowing on the inner surface side of the opening / closing lid.

Images