JP3823763B2 - Electronic device casing and projector including the electronic device casing - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an electronic device casing and a projector including the electronic device casing.
[0002]
[Background]
Conventionally, projectors are frequently used as presentations at conferences, academic conferences, exhibitions, and the like. Such a projector is composed of a housing and a projector main body housed in the housing, and the projector main body responds to image information captured from outside through various optical components with a light beam emitted from a light source. Then, an optical image is formed by modulation, and the optical image is enlarged and projected on a screen or the like.
For this reason, the projector main body is provided with a circuit board on which circuit components such as a CPU (Central Processing Unit) and an image processing unit for capturing image information and performing arithmetic processing and the like are mounted.
[0003]
Here, in such a projector main body, in order to project an optical image according to image information, the processing capability of the CPU or the like has a great influence, so that the CPU or the like is required to be speeded up. Therefore, if the processing capacity of the CPU or the like is increased, strong electromagnetic waves are generated from the oscillation circuits of these circuit components. For this reason, generally, a projector is provided with an EMI (electromagnetic interference) countermeasure.
Measures against EMI are performed by depositing a metal such as aluminum on the inside of a resin-made electronic device casing and ensuring electrical continuity between the metal and the circuit board. That is, the projector main body including the circuit board is enclosed and housed in an electronic device casing on which metal is deposited in a state where electrical continuity with the metal is ensured.
[0004]
However, since such an electronic device casing is formed as a composite material of resin and metal, it is difficult to separate the resin and the metal, and only the metal portion used in the electronic device casing is taken out. In addition, there is a problem that it is difficult to carry out resin recycling by melting the remaining resin portion.
[0005]
Therefore, a configuration is adopted in which the projector is provided with a metal shield member independently inside the resin-made electronic device casing so that the resin portion and the metal portion can be separated.
Here, the assembly work of the projector having such a configuration will be described. First, the shield member on the lower housing side is attached to the lower housing in the electronic device housing composed of the upper housing and the lower housing. Secure with screws. Thereafter, the projector main body is installed on the shield member on the lower housing side, and the shield member on the lower housing side and the metal portion of the projector main body are fixed with screws or the like to ensure electrical continuity between them. Next, a shield member on the upper housing side is attached on the projector body, and a contact portion between the upper and lower shield members is fixed with a screw or the like. Finally, the projector body is assembled by covering the projector body with the upper housing and joining the upper and lower housings together.
[0006]
[Problems to be solved by the invention]
However, in such an assembly procedure, in order to ensure electrical continuity, the projector body and the upper and lower shield members must be screwed and fixed, and this screwing work becomes complicated, and the projector is manufactured. There is a problem that leads to cost increase. Further, increasing the number of locations to be screwed in this way causes not only a complicated manufacturing operation but also an increase in the number of parts.
Such a problem is not limited to the projector housing, but is also the same in other electronic device housings.
[0007]
SUMMARY OF THE INVENTION An object of the present invention is to provide an electronic device casing and a projector that can reduce the number of screwing points, reduce the burden during manufacturing work, reduce manufacturing costs, and improve recyclability. There is.
[0008]
[Means for Solving the Problems]
An electronic device casing according to the present invention is an electronic device casing formed with a shield structure that shields noise generated from circuit components constituting an electronic device main body housed therein, and is at least engaged with each other. In addition to the casing member, a shield member that covers the circuit component is provided independently on the inner side of the one casing member, and the other casing member is provided on the inner side of the one casing member. Another shield member that contacts the one shield member is independently provided on the inner side of the body member, and the shield structure includes the one shield member and the other shield member. The one shield member is deformed into the other shield member, and a deforming means for ensuring electrical continuity between the one shield member and the other shield member is provided, and the deforming means includes: The one housing part A ridge formed in one direction on the inner surface of the ridge and projecting toward the inner side; formed on the outer surface of the other casing member; and the one casing member and the other casing member are attached. The protrusion is slidably fitted in one direction, and the length of the protrusion in one direction is larger than the length of the groove in one direction. It is characterized by being.
[0009]
Here, since the one casing member, the other casing member, the one shield member, and the other shield member are separated from each other, the one casing member and the other casing member are made of resin. One shield member and the other shield member can be made of metal such as aluminum. For example, one housing member is a resin upper case disposed on the upper side, and the other housing member is a metal lower case disposed on the lower side of the upper case, and one shielding member Can be a metal top member disposed on the inner side of the upper case, and the other shield member can be a metal bottom member disposed on the inner side of the lower case.
If comprised in this way, since a lower case is resin, the metal part of a lower surface member will not be exposed to the exterior side of the housing | casing for electronic devices. For this reason, for example, an electronic device having a light source such as a projector can be used for a long time, and the housing surface can be prevented from overheating even if it is overheated.
Further, in such a case, the present invention provides the deforming means, so that when one casing member and the other casing member are attached, one end portion of the protruding portion is directed toward the inner side. Projecting. The protruding portion deforms the one shield member and the other shield member to the inner side, thereby ensuring electrical continuity between the one shield member and the other shield member. Therefore, it is possible to ensure electrical continuity between one shield member and another shield member without performing screwing work as in the past, and to reduce the burden during the manufacturing work of the housing for electronic equipment, Cost can be reduced.
In addition, since the one casing member, the other casing member, the one shield member, and the other shield member are separated from each other as described above, when the electronic device casing is disassembled, the resin member and the metal member are separated. It can be easily disassembled into a member, and the recyclability of the electronic device casing can be improved.
[0010]
Here, it is preferable that the deformation means is configured as an engaging portion for engaging two housing members.
In this way, since the deforming means also serves as the engaging portion between the casing members, the inner surface shape of the casing member can be simplified as compared with the configuration in which the engaging portion and the deforming means are separated. For this reason, a housing member can be manufactured easily and manufacturing cost can be held down.
[0012]
Further, a boss is formed on the inner side of at least one of the casing members, and an insertion hole into which the boss is inserted is formed in the shield member disposed inside the casing member. A claw that engages with the boss is preferably formed around the periphery.
In such a case, when the insertion hole of the shield member is inserted into the boss of the housing member, the claw and the boss formed around the insertion hole are engaged, and the shield member is formed on the inner side of the housing member. Is fixed. Thereby, since it is not necessary to bother to fix the housing member and the shield member with screws or the like, it is possible to simplify the attaching operation of the housing member and the shield member and reduce the number of members to be used.
[0013]
At least one of the shield members is formed with a cut and raised piece cut and raised on the electronic device main body side accommodated therein, and the metal member of the electronic device main body may come into contact with the cut and raised piece. preferable.
Here, when the cut and raised pieces are formed only on the other shield members, for example, even if the electronic device main body is slightly shifted to the side opposite to the other shield members, the cut and raised pieces are cut on the electronic device main body side. Since it is raised, the state in which the metal part of the electronic device body and the cut and raised piece are in contact can be maintained, and electrical conduction between the metal part of the electronic device body and the shield member can be reliably ensured.
[0014]
When the cut and raised pieces are formed on the shield member as described above, a flange portion is formed on the outer peripheral portion of one of the two shield members, and the outer periphery of the other shield member. It is preferable that a notch groove into which the collar portion is inserted is formed in the portion.
In such a case, the two shield members are electrically connected via the cut and raised pieces as described above by inserting the collar portion into the notch groove and engaging the collar portion and the notch groove. In addition, since electrical continuity is ensured in each outer peripheral portion, electrical continuity between the two shield members can be ensured.
[0015]
Preferably, the circuit component has a noise generation source such as an oscillation circuit, and the shield structure is formed so as to cover at least the noise generation source.
In such a case, if the shield structure is formed so as to cover only the noise generation source, noise radiated to the outside can be suppressed, and the amount of the material forming the shield member can be reduced, resulting in cost reduction. Can be suppressed.
[0016]
A projector according to the present invention includes the electronic device casing.
According to the present invention as described above, it is possible to achieve the same effects as the effects in the electronic device casing, and it is possible to reliably drive according to the specifications.
[0017]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, an embodiment of the present invention will be described with reference to the drawings.
[1. (Main projector configuration)
1 is an overall perspective view of the projector 1 according to the present embodiment as seen from above, FIG. 2 is an overall perspective view of the projector 1 as seen from below, and FIGS. 3 to 5 are perspective views showing the inside of the projector 1. is there. 3 is a diagram in which the upper case 21 of the projector 1 is removed from the state of FIG. 1, and FIG. 4 is a rear view of the shield member 80, the driver board 90, and the upper light guide 472 removed from the state of FIG. FIG. 5 is a view in which the optical unit 4 is removed from the state of FIG.
[0018]
1 to 4, a projector 1 includes an exterior case 2 as a casing for an electronic device, a power supply unit 3 accommodated in the exterior case 2, and a planar U-shaped optical unit that is also disposed in the exterior case 2. 4 and has an overall substantially rectangular parallelepiped shape.
[0019]
The exterior case 2 is made of ABS resin, and includes an upper case 21 as one casing member and a lower case 23 as another casing member. These cases 21 and 23 are fixed to each other with screws.
The configuration on the inner side of the outer case 2 will be described in detail later, and here, the configuration on the outer side of the outer case 2 will be described.
[0020]
The upper case 21 includes an upper surface portion 211, a side surface portion 212 provided around the upper surface portion 211, a back surface portion 213, and a front surface portion 214.
On the front side of the upper surface portion 211, a lamp cover 24 is fitted and detachably attached. Further, in the upper surface portion 211, a notch portion 211A where the upper surface portion of the projection lens 46 is exposed is provided on the side of the lamp cover 24 so that the zoom operation and the focus operation of the projection lens 46 can be performed manually via a lever. It has become. An operation panel 25 is provided on the rear side of the notch 211A.
[0021]
The front part 214 includes a round hole opening 212A continuous with the cutout part 211A of the upper case 21, and a projection lens 46 is disposed corresponding to the round hole opening 212A. In the front part 214, an exhaust port 212B located on the front side of the internal power supply unit 3 is provided on the side opposite to the round hole opening 212A, and cooling air is removed from the image projection area in the exhaust port 212B. An exhaust louver 26 is provided that exhausts in the direction, that is, the left side in FIG. 1 and also serves as a light shield (the exhaust louver 26 is actually attached to the lower case 23).
[0022]
The lower case 23 is formed of a bottom surface portion 231, a side surface portion 232, a back surface portion 233, and a front surface portion 234 provided around the bottom surface portion 231.
A position adjustment mechanism 27 that adjusts the inclination of the entire projector 1 and aligns the projected image is provided on the front side of the bottom surface portion 231. Further, another position adjusting mechanism 28 for adjusting the inclination of the projector 1 in another direction is provided at one corner on the rear side of the bottom surface portion 231, and a rear foot 231 </ b> A is provided at the other corner. However, the position of the rear foot 231A cannot be adjusted. Further, the bottom surface portion 231 is provided with an intake port 231B for cooling air. One side surface portion 232 is provided with an attachment portion 232A for rotatably attaching the U-shaped handle 29.
[0023]
On one side of the exterior case 2, a side foot 2 A that serves as a foot when the projector 1 is stood with the handle 29 on the side portions 212 and 232 of the upper case 21 and the lower case 23. (FIG. 2) is provided.
Further, on the back side of the exterior case 2, an interface portion 2B is provided that opens across the back portion 213 of the upper case 21 and the back portion 233 of the lower case 23, and an interface board fixing member 85 is provided in the interface portion 2 B. (FIG. 11) is provided.
Further, on both the left and right sides of the interface portion 2B, speaker holes 2C and intake ports 2D are provided across the back surface portions 213 and 233, respectively. Of these, the air inlet 2 </ b> D is located on the rear side of the internal power supply unit 3.
[0024]
As shown in FIG. 4, the power supply unit 3 includes a power supply 31 and a lamp driving circuit (ballast) 32 disposed on the side of the power supply 31.
The power supply 31 supplies the power supplied through the power cable to the lamp drive circuit 32, the L-shaped driver board 90 (FIG. 3), etc., and an inlet connector 33 (FIG. 2) into which the power cable is inserted. Is provided.
The lamp driving circuit 32 supplies power to the light source lamp 411 (FIG. 7) of the optical unit 4.
[0025]
The optical unit 4 is a unit that optically processes the light beam emitted from the light source lamp 411 to form an optical image corresponding to image information, as shown in FIGS. 41, a color separation optical system 42, a relay optical system 43, an electro-optical device 44, a cross dichroic prism 45 (FIG. 7) as a color synthesis optical system, and a projection lens 46 as a projection optical system.
[0026]
[2. Detailed configuration of optical system)
4 and 7, the integrator illumination optical system 41 forms an image of three liquid crystal panels 441 (respectively indicated as liquid crystal panels 441R, 441G, and 441B for red, green, and blue color lights) constituting the electro-optical device 44, respectively. An optical system for illuminating the region substantially uniformly, a light source device 413, a first lens array 418, a second lens array 414 including a UV filter, a polarization conversion element 415, a first condenser lens 416, A reflection mirror 424 and a second condenser lens 419 are provided.
[0027]
Among these, the light source device 413 includes a light source lamp 411 as a radiation light source that emits a radial light beam, and a reflector 412 that reflects the radiation light emitted from the light source lamp 411. As the light source lamp 411, a halogen lamp, a metal halide lamp, or a high-pressure mercury lamp is often used. A parabolic mirror is used as the reflector 412. In addition to a parabolic mirror, an ellipsoidal mirror may be used together with a collimating lens (concave lens).
[0028]
The first lens array 418 has a configuration in which small lenses having a substantially rectangular outline when viewed from the optical axis direction are arranged in a matrix. Each small lens splits the light beam emitted from the light source lamp 411 into a plurality of partial light beams. The contour shape of each small lens is set so as to be almost similar to the shape of the image forming area of the liquid crystal panel 441. For example, if the aspect ratio (ratio of horizontal and vertical dimensions) of the image forming area of the liquid crystal panel 441 is 4: 3, the aspect ratio of each small lens is also set to 4: 3.
[0029]
The second lens array 414 has substantially the same configuration as the first lens array 418, and has a configuration in which small lenses are arranged in a matrix. The second lens array 414 has a function of forming an image of each small lens of the first lens array 418 on the liquid crystal panel 441 together with the first condenser lens 416 and the second condenser lens 419.
[0030]
The polarization conversion element 415 is disposed between the second lens array 414 and the first condenser lens 416 and is unitized with the second lens array 414. Such a polarization conversion element 415 converts the light from the second lens array 414 into a single type of polarized light, thereby improving the light use efficiency in the electro-optical device 44.
[0031]
Specifically, each partial light converted into one type of polarized light by the polarization conversion element 415 is finally liquid crystal panels 441R, 441G, 441B of the electro-optical device 44 by the first condenser lens 416 and the second condenser lens 419. It is almost superimposed on the top. In the projector 1 (electro-optical device 44) of the present embodiment using the liquid crystal panel 441 of the type that modulates polarized light, only one type of polarized light can be used. Almost half of the light is not used.
Therefore, by using the polarization conversion element 415, all the light emitted from the light source lamp 411 is converted into one type of polarized light, and the light use efficiency in the electro-optical device 44 is enhanced.
[0032]
The color separation optical system 42 includes two dichroic mirrors 421 and 422 and a reflection mirror 423, and a plurality of partial light beams emitted from the integrator illumination optical system 41 by the dichroic mirrors 421 and 422 are red, green, and blue. It has a function of separating into three color lights.
[0033]
The relay optical system 43 includes an incident side lens 431, a relay lens 433, and reflection mirrors 432 and 434, and has a function of guiding the color light and blue light separated by the color separation optical system 42 to the liquid crystal panel 441B.
[0034]
At this time, the dichroic mirror 421 of the color separation optical system 42 transmits the blue light component and the green light component of the light beam emitted from the integrator illumination optical system 41 and reflects the red light component. The red light reflected by the dichroic mirror 421 is reflected by the reflecting mirror 423, passes through the field lens 417, and reaches the red liquid crystal panel 441R. The field lens 417 converts each partial light beam emitted from the second lens array 414 into a light beam parallel to the central axis (principal ray). The same applies to the field lens 417 provided on the light incident side of the other liquid crystal panels 441G and 441B.
[0035]
Of the blue light and green light transmitted through the dichroic mirror 421, the green light is reflected by the dichroic mirror 422, passes through the field lens 417, and reaches the green liquid crystal panel 441G. On the other hand, the blue light passes through the dichroic mirror 422, passes through the relay optical system 43, passes through the field lens 417, and reaches the liquid crystal panel 441B for blue light. The reason why the relay optical system 43 is used for blue light is that the optical path length of the blue light is longer than the optical path lengths of the other color lights, thereby preventing a reduction in light use efficiency due to light diffusion or the like. Because. That is, this is to transmit the partial light beam incident on the incident side lens 431 to the field lens 417 as it is.
[0036]
The electro-optical device 44 includes liquid crystal panels 441R, 441G, and 441B as three light modulation devices, which use, for example, polysilicon TFTs as switching elements and are separated by the color separation optical system 42. Each color light is modulated by these three liquid crystal panels 441R, 441G, and 441B in accordance with image information to form an optical image.
[0037]
The cross dichroic prism 45 forms a color image by combining images modulated for each color light emitted from the three liquid crystal panels 441R, 441G, and 441B. In the cross dichroic prism 45, a dielectric multilayer film that reflects red light and a dielectric multilayer film that reflects blue light are formed in a substantially X shape along the interface of four right-angle prisms. Three color lights are synthesized by the dielectric multilayer film. The color image synthesized by the cross dichroic prism 45 is emitted from the projection lens 46 and enlarged and projected on the screen.
[0038]
Each of the optical systems 41 to 45 described above is housed in a light guide 47 made of synthetic resin as a housing for optical components, as shown in FIGS.
The light guide 47 includes a lower light guide 471 provided with grooves for fitting the above-described optical components 414 to 419, 421 to 423, 431 to 434 from above, and an upper opening of the lower light guide 471. The upper light guide 472 has a lid shape that closes the side.
A head portion 49 is formed on the light exit side of the light guide 47. The projection lens 46 is fixed to the front side of the head portion 49, and the cross dichroic prism 45 to which the liquid crystal panels 441R, 441G, 441B are attached is fixed to the rear side.
[0039]
[3. (Cooling structure)
In the projector 1 of this embodiment, the panel cooling system A that mainly cools the liquid crystal panels 441R, 441G, and 441B, the lamp cooling system B that mainly cools the light source lamp 411, and the power source cooling system that mainly cools the power source 31. C.
[0040]
2, 4, and 5, the panel cooling system A uses a pair of sirocco fans 51 and 52 disposed on both sides of the projection lens 46. The cooling air sucked from the lower surface intake port 231B by the sirocco fans 51, 52 cools the liquid crystal panels 441R, 441G, 441B from below to above, and then cools the lower surface of the driver board 90 (FIG. 3). It is brought closer to the axial exhaust fan 53 side at the front corner and exhausted from the front side exhaust port 212B.
[0041]
4 to 6, in the lamp cooling system B, a sirocco fan 54 provided on the lower surface of the optical unit 4 is used. Cooling air in the projector 1 attracted by the sirocco fan 54 enters the light guide 47 through an opening (not shown) provided in the upper light guide 472, and between the united second lens array 414 and the polarization conversion element 415. After these are cooled, they exit from the exhaust side opening 471A of the lower light guide 471 and are sucked into the sirocco fan 54 and discharged. The discharged cooling air enters the light guide 47 again from the intake side opening 471B of the lower light guide 471, enters the light source device 413, cools the light source lamp 411, and then exits the light guide 47 to The air is exhausted from the exhaust port 212B by the axial exhaust fan 53.
[0042]
In FIG. 4, the power supply cooling system C uses an axial flow intake fan 55 provided behind the power supply 31. The cooling air sucked from the rear side intake port 2D by the axial flow intake fan 55 cools the power source 31 and the lamp drive circuit 32, and then is exhausted by the axial flow exhaust fan 53 in the same manner as the other cooling systems A and B. The air is exhausted from the port 212B.
[0043]
[4. (Structure on the inner side of the outer case)
Next, the internal structure of the exterior case 2 will be described with reference to FIGS.
FIG. 8 shows the inner side of the upper case 21. As shown in FIG. 8, in the upper case 21, a protrusion 214 </ b> X protruding inward is formed on the inner surface of the front portion 214 in the vertical direction. Further, a convex portion 211X having a rectangular cross section that protrudes inward (downward) is formed on the inner surface of the upper surface portion 211. The convex portion 211X presses the shield member 80 toward the inner side (downward).
[0044]
FIG. 9 shows the inner side of the lower case 23 to which the bottom member 82 that is a part of the shield member 80 is attached. As shown in FIG. 9, a cylindrical boss 231 </ b> X that protrudes to the inner side (upward) is formed on the back side of the inner surface of the bottom surface portion 231 of the lower case 23. Although hidden in FIG. 9, a boss having the same shape as the boss 231 </ b> X is also formed on the right side of the inner surface of the bottom surface portion 231 of the lower case 23.
[0045]
Further, a groove portion 234X into which the protruding portion 214X is slidably fitted from above is formed on the outer surface of the front portion 234 of the lower case 23. Therefore, when the upper case 21 and the lower case 23 are attached, the tip of the protrusion 214X and the groove 234X are engaged. For this reason, this part becomes an engaging part shown in claim 2. Here, since the length in the vertical direction of the protrusion 214X is formed to be larger than the length in the vertical direction of the groove 234X, the upper case 21 and the lower case 23 are attached. In this case, the upper portion of the protrusion 214X protrudes toward the inner side.
[0046]
The bottom surface portion 231 protrudes to the inner side (upward) and has a screw hole and a protrusion at the upper end portion in order to ensure the joining with the bottom surface member 82 which is the lower portion of the shield member 80. A plurality of screwing portions provided as a set are formed. In these screwing portions, two on the back side of the bottom surface portion 231 are screwing portions 231P for fixing the interface board fixing member 85 described later, and two on the left side are screwing portions for fixing the lamp driving circuit fixing member 84 described later. 231Q, two on the left side of the center are screwing portions 231R for fixing the power supply fixing member 86, and two on the right side of the center are screwing portions 231S for fixing the central member 832 of the circuit board fixing member 83 described later.
[0047]
[5. (Shield structure)
Next, the structure of the shield member 80 will be described.
As shown in FIGS. 10 and 11, the shield member 80 is attached to the inside of the exterior case 2 and includes a top member 81 as one shield member and a bottom member 82 as another shield member. These top member 81 and bottom member 82 are formed by sheet metal processing a punching metal plate in which a plurality of holes are formed in a metal plate.
[0048]
Further, the shield member 80 includes a circuit board fixing member 83, a lamp driving circuit fixing member 84, an interface board fixing member 85, a power supply fixing member 86, and a driver board board fixing member 87. These fixing members 83 to 87 are provided between the upper surface member 81 and the bottom surface member 82, respectively.
[0049]
As shown in FIG. 12, the upper surface member 81 is formed according to the shape of each part 211 to 214 of the upper case 21, and is a member in which a plurality of punching holes 81 </ b> A for internal cooling are formed. And left and right side surface portions 812, a back surface portion 813, and a front surface portion 814 that are formed vertically from the periphery of the upper surface portion 811.
[0050]
A rectangular opening 811A for exposing the upper surface portion of the light source device 413 is formed on the front side of the upper surface portion 811 when the light source device 413 is replaced.
The right side surface 812R of the left and right side surfaces 812 is bent into a side L shape, and a rib 812R1 projecting outward is formed at the L-shaped tip. In addition, a rib 812L1 projecting outward is formed at the tip of the left side surface portion 812L as well as the rib 812R1.
[0051]
One screw hole is formed in the back surface portion 813, and the upper surface member 81 and the upper case 21 are separated by screwing between the screw hole and the screw hole of the back surface portion 213 of the upper case 21. Secured so that there is no. Further, the back portion of the interface board fixing member 85 is also fixed at this portion.
Since the upper surface member 81 is disposed on the lower surface member 82, such screwing is not necessarily required, but it may be possible that these may come off and cause a malfunction in the device. It has stopped.
[0052]
As shown in FIG. 9, the bottom surface member 82 is formed according to the shape of the bottom surface portion 231 and the like of the lower case 23, and the bottom surface portion 821 and the left and right side surface portions 822 (vertically formed from the periphery of the bottom surface portion 821). 10), a back surface portion 823, and a front surface portion 824.
[0053]
In the bottom surface portion 821, a right side portion thereof is cut out in accordance with the air inlet 231B of the bottom surface portion 231, and cut and raised pieces 821A and 821B cut and raised upward are formed in the left side portion. Further, a substantially rectangular opening 821C for allowing the sirocco fan 54 (FIG. 5) to communicate with the inside is formed at the center.
[0054]
Furthermore, bottom ribs 821P to 821S that are cut and raised to the inner side so as to cover the upper ends of the screwing portions 231P to 231S formed on the bottom surface 231 of the lower case 23 are formed on the bottom surface 821. . The bottom ribs 821P to 821S correspond to the convex portions formed on the bottom ribs 821P to 821S in order to determine the positions corresponding to the screw holes of the screwing portions 231P to 231S and the positions of the screwing portions 231P to 231S. A hole is formed at the position to be.
[0055]
Here, as shown in FIG. 13, a power supply fixing member 86 in which the power source 31 is accommodated is installed on the cut and raised piece 821A, and the bottom member 82 and the power supply fixed member 86 are connected via the cut and raised piece 821A. Electrical continuity is ensured. In addition, a lamp driving circuit fixing member 84 in which the lamp driving circuit 32 is accommodated is placed on the cut and raised piece 821B, and the bottom member 82 and the lamp driving circuit fixing member 84 are electrically connected to each other via the cut and raised piece 821A. Continuity is ensured.
[0056]
Ribs 86R and 84Q projecting outward from the main body are formed on the lower portions of the power supply fixing member 86 and the lamp driving circuit fixing member 84, respectively, and screwed portions 231R are formed on these ribs 86R and 84Q. , 231Q screw holes and two holes corresponding to the protrusions are formed.
[0057]
Here, when the screwing portion 231Q, the bottom rib 821Q, and the rib 84Q are screwed, and similarly, when the screwing portion 231R, the bottom rib 821R, and the rib 86R are screwed, the fastening force of the bottom member 82 is obtained by the tightening force. 821A and 821B are energized, and the state which contact | abutted to the lower surface of the lamp drive circuit fixing member 84 and the power supply fixing member 86 is maintained. Thereby, electrical conduction is ensured. On the other hand, electrical continuity is ensured even by screwing the ribs 86R and 84Q.
In summary, the power supply fixing member 86, the lamp driving circuit fixing member 84, and the bottom surface member 82 can be electrically connected even by screwing the ribs 86R and 84Q in addition to the urging of the cut and raised pieces 821A and 821B. ing.
[0058]
Returning to FIG. 9, a circular insertion hole 825 for inserting the cylindrical boss 231 </ b> X of the lower case 23 is formed on the back surface side of the bottom surface portion 821 of the bottom surface member 82. A claw 825X extending toward the center of the insertion hole 825 is formed.
[0059]
The outer diameter of the boss 231X is slightly smaller than the inner diameter of the insertion hole 825. The extension dimension of the claw 825X is larger than the difference between the inner diameter dimension of the insertion hole 825 and the outer diameter dimension of the boss 231X. Therefore, when the insertion hole 825 is inserted into the boss 231X, the claw 825X that is a sheet metal is deformed in the insertion direction, and the claw 825X is caught on the side surface of the boss 231X. As a result, the bottom member 82 is locked to the lower case 23.
[0060]
The thickness and shape of the claw 825X may be determined so that the claw 825X bends and engages with the boss 231X when the boss 231X is inserted into the insertion hole 825, and the shape and the like are not particularly limited.
[0061]
A boss similar to the boss 231X is also formed on the right side of the bottom surface portion 231 of the lower case 23, while an insertion hole and a claw corresponding to these bosses are also formed in the bottom surface member 82. For this reason, the bottom member 82 is also locked to the lower case 23 in this portion.
[0062]
Further, the back surface portion 823 is formed with a rib 823A in which the tip of the bent portion is further bent outward so as to cover the upper side of the step formed on the bottom surface portion 231 of the lower case 23. The rib 823A has an interface on the rib 823A. The board fixing member 85 is placed (FIGS. 11 and 13), and electrical contact between the rib 823A and the rib 851A bent inward at the bottom surface portion of the interface board fixing member 85 is performed. Continuity is ensured.
[0063]
As shown in FIG. 10, the circuit board fixing member 83 is a metal member for supporting the driver board 90 inside the upper surface portion 811 of the upper surface member 81, and supports the right end portion 90 </ b> R of the driver board 90. A right member 831 disposed in the vicinity of the inner surface of the right side surface portion 822R, a center member 832 that supports the center end portion 90C of the driver board 90 and is fixed to the right side of the front surface portion 814 of the upper surface member 81; Is provided.
[0064]
The right member 831 is a member in which a rib portion is formed. The right end portion 90R of the driver board 90 is sandwiched between the upper rib portion of the right member 831 and the upper surface portion 811 of the upper surface member 81, and the right member 831 and the upper surface portion 811 are sandwiched between the driver board 90. Are screwed to fix the driver board 90 in the shield member 80. The right member 831 is formed with a rib projecting to the outside in order to make contact with the bottom surface member 82.
[0065]
The central member 832 is also a member in which a rib portion is formed. A central end portion 90C of the driver board 90 is sandwiched between the upper rib portion of the central member 832 and the upper surface portion 811 of the upper surface member 81, and the central member 832 and the upper surface portion 811 are sandwiched between the driver board 90. And the driver board 90 is fixed in the shield member 80. The left end 90L of the driver board 90 is disposed on the lamp driving circuit fixing member 84.
[0066]
As shown in FIGS. 11 and 13, the interface board fixing member 85 is a member arranged on the inner side of the back surface part 233 of the lower case 23, and a main body 851 for fixing the interface board 91 on which various connectors are mounted. And a slit portion 852 that extends from the main body 851 and is located on the inner side of the left rear corner of the lower case 23 and in which a slit corresponding to the air inlet 2D is formed.
[0067]
Two ribs 851A projecting toward the inner side are formed on the lower portion of the main body 851, and these ribs 851A are screwed together with the bottom ribs 821P and the screwing portions 231P. Here, a driver board substrate fixing member 87 is installed on the back side of the driver board 90, and the upper surface member 81 and the driver board 90 are screwed to the driver board substrate fixing member 87. Further, the interface fixing member 85 and the driver board substrate fixing member 87 are also screwed. Thereby, electrical conduction between the upper surface member 81 and the bottom surface member 82 is ensured through the interface fixing member 85 and the driver board substrate fixing member 87.
[0068]
As shown in FIGS. 11 and 13, the lamp driving circuit fixing member 84 is formed of a cylindrical body obtained by bending a metal plate, and the lamp driving circuit 32 is fixed between an upper end surface 841 and a lower end surface 842 thereof. Yes. The upper end surface 841 is in contact with the rib 812L1 of the left side surface portion 812L of the upper surface member 81, and the lower end surface 842 is in contact with the cut and raised piece 821B of the bottom surface member 82. Thereby, electrical conduction between the upper surface member 81 and the bottom surface member 82 is ensured via the lamp driving circuit fixing member 84.
[0069]
As shown in FIG. 13, the power supply fixing member 86 is formed of a cylindrical body obtained by bending a metal plate, and the power supply 31 is fixed between an upper end surface 861 and a lower end surface 862 thereof. The upper end surface 861 is in contact with the upper surface member 81, and the lower end surface 862 is in contact with the cut and raised piece 821 </ b> A of the bottom surface member 82. Thereby, electrical conduction between the top surface member 81 and the bottom surface member 82 is ensured through the power supply fixing member 86.
[0070]
As described above, the lamp driving circuit fixing member 84 and the power source fixing member 86 are formed of a cylindrical body obtained by bending a metal plate, and the cylindrical end portions are opened. For this reason, when the cooling air passes through these openings, the internal lamp driving circuit 32, the power source 31 and the like are cooled.
[0071]
[6. (Assembly procedure of projector)
Next, a procedure for assembling the projector 1 will be described with reference to FIG. 14 in addition to FIGS. Here, only the portion related to the shield member 80 will be described, and the description of the arrangement of members such as the optical unit 4 will be omitted.
[0072]
First, by inserting the insertion hole 825 of the bottom surface member 82 into the boss 231X of the lower case 23 and engaging the claw 825X around the insertion hole 825 with the side surface of the boss 231X, the bottom surface member 82 is lowered. Attach to case 23.
[0073]
Next, in a state where the lamp driving circuit fixing member 84 and the power source fixing member 86 are connected, they are arranged on the cut and raised pieces 821A and 821B.
The rib 86R and the bottom surface rib 821R of the bottom surface member 82 are brought into contact with each other, and the rib 84Q and the bottom surface rib 821Q of the bottom surface member 82 are brought into contact with each other, so that the lamp driving circuit fixing member 84, the power source fixing member 86 and the bottom surface member are brought into contact. 82 and screw. Thereby, the lamp drive circuit fixing member 84 and the power source fixing member 86 are fixed to the lower case 23.
[0074]
Subsequently, as illustrated in FIG. 11, the interface board fixing member 85 is disposed on the upper end portion of the back surface portion 823 of the bottom surface member 82 while being attached to the lamp driving circuit fixing member 84. At this time, the rib portion of the interface board fixing member 85 and the bottom rib 821P of the bottom face member 82 are brought into contact with each other, and the interface board fixing member 85 and the bottom face member 82 are screwed together. As a result, the interface board fixing member 85 is fixed to the lower case 23.
[0075]
Then, as shown in FIG. 10, the right member 831 of the circuit board fixing member 83 and the right side surface portion 822R of the bottom surface member 82 are fixed by the rib portions. Further, the center member 832 of the circuit board fixing member 83 and the right side portion of the front portion 824 of the bottom surface member 82 are fixed.
[0076]
In the above state, as shown in FIG. 14, the lamp driving circuit fixing member 84, the power source fixing member 86, the interface board fixing member 85, and the circuit board fixing member 83 (the right member 831 and the central member 832, see FIG. 10). The driver board 90 on which the driver board substrate fixing member 87 is installed is placed on the board.
[0077]
Subsequently, the upper surface member 81 is disposed so as to cover the driver board 90.
At this time, as shown in FIGS. 10 and 11, the end portions of the front portions 814 and 824 are brought into contact with each other on the top member 81 and the bottom member 82. Further, in the side surface portion 812 of the upper surface member 81, the rib 812R1 of the right side surface portion 812R and the rib portion of the right member 831 of the circuit board fixing member 83 are brought into contact with each other, and the rib 812L1 of the left side surface portion 812L and the lamp driving circuit fixing member 84 is brought into contact with the upper end surface 841. Further, the interface board fixing member 85 and the back surface portion 813 of the upper surface member 81 are connected via the driver board board fixing member 87.
[0078]
Thereby, the upper surface member 81, the bottom surface member 82, the circuit board fixing member 83, the lamp driving circuit fixing member 84, the interface board fixing member 85, the power source fixing member 86, and the driver board board fixing member 87 constituting the shield member 80 are arranged. The electrical continuity between the shield member 80 and the driver board 90 (ground) is also ensured.
In particular, a noise generation source including an oscillation circuit is provided on the upper surface of the driver board 90, but the upper surface portion of the driver board 90 is entirely covered with an upper surface member 81.
[0079]
Finally, the upper case 21 is covered, and the upper case 21 and the lower case 23 are screwed to complete the projector 1.
[0080]
When the upper case 21 and the lower case 23 are attached in this manner, as shown in FIG. 15, the protrusions 214 </ b> X engage with the grooves 234 </ b> X of the lower case 23, and the front portions of the top surface member 81 and the bottom surface member 82. The 814 and 824 are deformed to the inner side and are brought into contact with each other, whereby electrical conduction between the top member 81 and the bottom member 82 is ensured. Accordingly, the protrusion 214X serves both as a function as an engaging portion between the upper case 21 and the lower case 23 and as a function for deforming the upper surface member 81 and the bottom surface member 82 inward. .
[0081]
According to this embodiment, there are the following effects.
(1) Since the upper surface member 81 and the bottom surface member 82 are deformed to the inner side by the protrusion 214X of the upper case 21, the upper surface member 81 and the bottom surface member 82 are brought into contact with each other. Even if the bottom member 81 and the bottom member 82 are not screwed, the electrical connection between the top member 81 and the bottom member 82 can be secured, the burden during the manufacturing operation of the projector 1 can be reduced, and the manufacturing cost can be reduced. it can.
[0082]
(2) Further, the protrusion 214X of the upper case 21 relates to the function as a deformation means for deforming the upper surface member 81 and the bottom surface member 82 to the inner side as described above, and the upper case 21 and the lower case 23. It also serves as a mating engagement part. For this reason, compared with the structure which made the engaging part and the deformation | transformation means separate, the inner surface shape of the exterior case 2 can be simplified, Therefore The exterior case 2 can be manufactured easily and manufacturing cost can be held down.
[0083]
(3) Since the ABS resin upper case 21 and the lower case 23 and the shield member 80 are separated from each other, when the projector 1 is disassembled, it is easily disassembled into an ABS resin member and a metal member. Thus, the recyclability of the resin part in the projector 1 can be improved.
[0084]
(4) Since the entire exterior case 2 including the lower case 23 is made of ABS resin, the metal portion is not exposed to the outside of the projector 1. For this reason, even if the projector 1 is used for a long time and the internal optical unit 4 and the like are overheated, the surface of the outer case 2 is less likely to overheat.
[0085]
(5) Since the lower case 23 and the bottom surface member 82 are attached by engaging the boss 231X and the claw 825X of the insertion hole 825, the number of screwing points between the lower case 23 and the bottom surface member 82 can be minimized. Therefore, the attaching operation between the lower case 23 and the bottom member 82 can be simplified and the number of members used can be reduced.
[0086]
(6) The bottom member 82 is formed with cut and raised pieces 821A and 821B cut and raised toward the power supply fixing member 86 and the lamp drive circuit fixing member 84 (upward). The cut and raised pieces 821A and 821B 86 and the lamp driving circuit fixing member 84 and the bottom surface member 82 are in contact with each other. Thus, since the cut and raised pieces 821A and 821B are cut and raised upward, it is possible to restrict the vertical movement (positional deviation) of the power supply fixing member 86 and the lamp drive circuit fixing member 84, and the power supply fixing member 86 and the lamp driving circuit fixing member 84 and the cut and raised pieces 821A and 821B can be maintained in contact with each other. For this reason, electrical conduction between the power source fixing member 86 and the lamp driving circuit fixing member 84 and the bottom surface member 82 can be reliably ensured.
[0087]
(7) The driver board 90 has a noise generation source such as an oscillation circuit. In the present embodiment, the upper surface member 81 is shaped so as to cover the entire driver board 90 but not part of the light source device, etc., and the upper surface member 81 is formed of a necessary minimum amount of material. For this reason, the noise radiated from the driver board 90 to the outside can be suppressed, and the amount of the material forming the upper surface member 81 can be reduced, thereby reducing the cost.
[0088]
(8) In the shield member 80, the outer peripheral side is electrically connected to the upper surface member 81, the bottom surface member 82, the lamp driving circuit fixing member 84, and the interface board fixing member 85, and the inner side thereof is Electrical continuity is ensured by contact of the circuit board fixing member 83, the power supply fixing member 86, and the driver board 90. Thus, since electrical continuity is ensured on both sides of the outer peripheral side and the inner side, the electrical continuity of the shield member 80 can be ensured.
[0089]
(9) Since the convex portion 211X of the upper surface portion 211 of the upper case 21 presses the shield member 80 toward the inner side (downward), the electricity in the vertical direction between the members 81 to 86 constituting the shield member 80 The electrical continuity can be further ensured.
[0090]
In addition, this invention is not limited to the said embodiment, Including other structures etc. which can achieve the objective of this invention, the deformation | transformation etc. which are shown below are also contained in this invention.
In the embodiment, the upper surface member 81 and the bottom surface member 82 are joined by forming rib portions on both the upper surface member 81 and the bottom surface member 82 and bringing these rib portions into contact with each other. However, the present invention is not limited to this, and the following configuration may be used.
That is, as shown in FIG. 16, for example, a notch groove 82X in which a collar portion 81X is formed on the right side surface portion 812R of the upper surface member 81 and a collar portion 81X is inserted in the right side surface portion 822R of the bottom surface member 82. Form. At this time, the right side surface portion 822R is formed such that the upper portion 82X1 and the lower portion 82X2 of the notch groove 82X are shifted by the thickness dimension of the upper surface member 81.
For this reason, the upper surface member 81 and the bottom surface member 82 can be easily joined only by inserting the collar part 81X into the notch groove 82X. At this time, since the upper portion 82X1 and the lower portion 82X2 of the notch groove 82X are formed so as to be shifted, the collar portion 81X can be easily inserted into the notch groove 82X, and the right side surface portion 812R and the right side surface portion 822R are flush with each other. Can be.
Such a configuration is not limited to the engagement portion between the right side surface portion 812R of the top surface member 81 and the right side surface portion 822R of the bottom surface member 82, but can also be employed for the engagement of other portions such as the front surface portion and the back surface portion. .
[0091]
In the above-described embodiment, the lower case 23 and the bottom surface member 82 are fixed by the engagement of the boss 231X and the claw 825X, but the same configuration as this is provided between the upper case 21 and the top surface member 81. Can also be adopted.
[0092]
In the above-described embodiment, the cut and raised pieces 821A and 821B are formed on the bottom surface member 82. However, if the electrical continuity is reliably ensured, it may not be formed. On the contrary, the upper surface member 81 may be formed with cut and raised pieces similar to the cut and raised pieces 821A and 821B.
[0093]
In the above-described embodiment, the lower case 23 and the bottom surface member 82 are formed as separate bodies. However, the present invention is not limited to this, and may be formed integrally with metal. However, the embodiment has an advantage that the surface of the outer case 2 is less likely to overheat because the metal portion is not exposed to the outside of the projector 1.
[0094]
In the above embodiment, the claw 825X is formed around the insertion hole 825 and engaged with the boss 231X. Conversely, the claw is formed on the side surface of the boss 231X to You may make it engage. Further, the shape and quantity of the boss 231X are not particularly limited. In short, as long as the shield member 80 can be fixed to the exterior case 2 without using screws or the like, these shapes, structures, quantities, and the like are not particularly limited.
[0095]
In the above-described embodiment, the upper surface member 81 has a shape covering the entire upper surface portion of the driver board 90. However, the present invention is not limited to this, and for example, the upper surface member 81 may be formed so as to cover only a portion that becomes a noise generation source. Alternatively, a part of the light source device may be covered. In short, the shape of the shield member 80 including the upper surface member 81 is not particularly limited as long as it is formed so as to cover at least the noise generation source.
[0096]
Moreover, in the said embodiment, although the exterior case 2 was made from ABS resin, it is not restricted to this, You may make it from other resin.
Furthermore, although the shield member 80 is made of metal, various metals such as aluminum, stainless steel, and magnesium can be used as this metal.
[0097]
In the embodiment, the outer case 2 is used for the projector 1, but the present invention is not limited to this and can be used for other electronic devices such as game machines.
[0098]
【The invention's effect】
As described above, according to the present invention, it is possible to reduce the number of screwing points, reduce the burden during manufacturing work, reduce the manufacturing cost, and improve the recyclability. is there.
[Brief description of the drawings]
FIG. 1 is an overall perspective view of a projector according to an embodiment of the present invention as viewed from above.
FIG. 2 is an overall perspective view of the projector as viewed from below.
FIG. 3 is a perspective view showing the inside of the projector, and more specifically, is a view in which the upper case of the projector is removed from the state of FIG.
4 is a perspective view showing the inside of the projector, specifically, a view seen from the rear side with the shield member, the driver board, and the upper light guide removed from the state of FIG. 3. FIG.
FIG. 5 is a perspective view showing the inside of the projector, specifically, a view in which an optical unit is removed from the state of FIG.
FIG. 6 is a perspective view of the optical unit as viewed from below.
FIG. 7 is a plan view schematically showing an optical system of the projector.
FIG. 8 is a perspective view showing an inner side of the upper case.
FIG. 9 is a perspective view showing an inner side of a lower case to which a bottom member constituting the shield member is attached.
FIG. 10 is a perspective view of the shield member as viewed from the front side.
FIG. 11 is a perspective view of the shield member as viewed from the rear side.
FIG. 12 is a perspective view showing an upper surface member constituting the upper case and the shield member.
13 is a perspective view showing a state in which a lamp driving circuit fixing member, a power source fixing member, and an interface board fixing member are attached to FIG. 9. FIG.
14 is a perspective view showing a state in which the driver board and the upper surface member are attached to FIG.
FIG. 15 is an enlarged longitudinal sectional view showing a front side of the projector.
FIG. 16 is a view showing a modification of the contact portion between the upper surface member and the bottom surface member.
[Explanation of symbols]
1 Projector
2 Exterior case as a housing for electronic equipment
3 Power supply unit as electronic equipment
21 Upper case as one housing member
23 Lower case as other housing member
80 Shield member as shield structure
81 Upper surface member as one shield member
82 Bottom member as another shield member
90 Driver board as a circuit component
214X Projection part which is a deformation means and constitutes an engagement part
231X Boss
234X Groove part constituting the engaging part
821A, 821B Cut and raised pieces
825 insertion hole
825X nails

Claims (7)

A casing for electronic equipment in which a shield structure that shields noise generated from circuit components constituting the electronic equipment main body housed therein is formed,
Comprising at least two housing members engaged with each other;
In addition to the casing member, a single shield member that covers the circuit component is independently provided on the inner side of the one casing member.
On the inner side of the other casing member, another shield member that contacts the one shield member is independently provided,
The shield structure includes the one shield member and the other shield member.
Deformation means is provided for deforming the one shield member into the other shield member to ensure electrical continuity between the one shield member and the other shield member,
The deformation means includes
A ridge formed in one direction on the inner surface of the one housing member and projecting toward the inner side;
Formed on the outer surface of the other casing member, and when the one casing member and the other casing member are attached, the protrusion includes a groove portion that is slidably fitted in one direction,
The length for the one direction in the said protrusion part is formed so that it may become larger than the length dimension to the one direction in the said groove part, The housing | casing for electronic devices characterized by the above-mentioned.   2. The electronic device casing according to claim 1, wherein the deforming unit is configured as an engaging portion that engages two housing members. 3.   3. The electronic device casing according to claim 1, wherein a boss is formed on an inner side of at least one of the casing members, and the shield member disposed inside the casing member includes An electronic device housing, wherein an insertion hole into which a boss is inserted is formed, and a claw that engages with the boss is formed around the insertion hole.   The electronic device casing according to any one of claims 1 to 3, wherein at least one of the shield members is formed with a cut and raised piece cut and raised on the electronic device main body side accommodated therein. An electronic device casing, wherein the metal member of the electronic device main body abuts on the cut and raised piece.   5. The electronic device casing according to claim 4, wherein a flange portion is formed on an outer peripheral portion of one of the two shield members, and an outer peripheral portion of the other shield member is A housing for electronic equipment, wherein a notch groove into which the collar portion is inserted is formed.   6. The electronic device casing according to claim 1, wherein the circuit component includes a noise generation source such as an oscillation circuit, and the shield structure covers at least the noise generation source. A housing for electronic equipment, characterized by being formed.   A projector comprising the casing for an electronic device according to any one of claims 1 to 6.

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