JP4873234B2 - Color wheel unit and projector - Google Patents

Description

  The present invention relates to a color wheel unit and a projector incorporating the color wheel unit.

Today, video projectors are widely used as image projection apparatuses that project personal computer screens and video images onto a screen.
This projector uses a high-intensity light source, and a lamp unit in which a concave reflecting mirror as a reflector is attached to a small high-intensity discharge lamp such as a metal highland lamp or an ultra-high pressure mercury lamp is incorporated in the projector as a projector light source device. There are many cases.

  In this lamp unit, a rotating parabolic reflector or a rotating ellipsoidal reflector is often used. A high-intensity discharge lamp is installed at the elliptical focal point of the reflector and emitted toward the front and rear. The reflected light is reflected by the rotating parabola or the ellipsoidal reflector and condensed on the light tunnel or light guide rod.

  Then, light from a light source device incorporating a high-intensity discharge lamp such as an ultra-high pressure mercury lamp was colored by passing through a filter in the color wheel unit, and the colored light was passed through a light guide rod or the like. After that, a color image is displayed on the screen by the amount of light in an on state that is focused on a micromirror display element generally called DMD by a lens or mirror and reflected toward the projection port of the projector device by this display element. It is something to be made.

  The color wheel unit of such a projector is formed of a color wheel having a red filter, a green filter, and a blue filter, and a wheel motor that rotates the color wheel at a rotation speed of about 120 times per second. Since this color wheel has a central portion connected to a wheel motor and is rotated by the rotation of the wheel motor, the connection needs to be strong. Therefore, various proposals have been made regarding the connection between the color wheel and the wheel motor.

  For example, in Japanese Patent Application Laid-Open No. 2005-326678 (Patent Document 1), a color wheel in which a fan-shaped color filter is bonded to a frame provided with a light transmission path and a hub for connection with a wheel motor is formed at the center is used as a wheel. There have been proposals for fixing by screwing to a motor.

  In the proposal of Patent Document 1, a plurality of fan-shaped color filters are bonded to a frame formed of metal or the like, and a hub formed at the center of the frame is screwed to the wheel motor, whereby the color wheel is connected to the wheel motor. Can be firmly fixed.

  In JP-A-2005-181957 (Patent Document 2), a center shaft, a first support member having a first coupling portion, a second support member having a second coupling portion that engages with the first coupling portion, and A color wheel comprising a color filter comprising at least one filter piece, and engaging a protrusion provided on the first or second support surface with a hole in the color wheel before the first support. An invention is proposed in which the color wheel is sandwiched between the first support member and the second support member and is tightly fixed by screwing the first connection portion of the member and the second connection portion of the second support member. Has been.

In the proposal of Patent Document 2, it is possible to prevent the color wheel from spinning due to the engagement of the opening of the color wheel and the protrusion provided on the support surface, and the first support member and the second support. It can fix firmly by fixing between members.
JP 2005-326678 A JP 2005-181957 A

  In the conventional technology as described above, when a color filter formed of glass is bonded and fixed to a metal or the like, there is a problem that the color filter is detached because the adhesion peels off during high-speed rotation of the color wheel. It was.

  In addition, since the color filter is made of glass, there is a problem in that it is damaged when excessive pressure is applied when firmly fixing. Further, in order to prevent the color filter from being damaged, there is a problem that when the pressure is weakened and the color filter is fixed, the color wheel is detached from the wheel motor during rotation of the color wheel.

  Therefore, an object of the present invention is to provide a color wheel unit that can prevent the color wheel from being damaged and can be firmly fixed to the wheel motor, and a projector that incorporates the color wheel unit.

According to a first aspect of the present invention, a color wheel unit includes a color wheel having filters of different colors, a ring-shaped fixed hub that rotates together with a rotor of a wheel motor, and a color protruding from a peripheral edge of a circular plate-shaped hub body plate. A tightening hub having a peripheral edge restraining portion in contact with a wheel; and a pressing screw for compressing and fixing the tightening hub to the fixed hub, the fixed hub having a ring-shaped hub main body having an opening in the center; A wheel fixing portion formed so as to protrude from the inner peripheral edge of the hub body portion with the central axis of the hub body portion as an axis, and having a diameter on the outer periphery substantially the same as the diameter of the fixing opening of the color wheel, A screw hole in which the pressing screw is located is formed at the center of the hub body plate of the clamping hub, and the pressing screw is positioned at the center of the wheel fixing portion. To screw holes are formed, the above-fitted through the wheel fixing portion of the fixing hub in the fixing opening portion of the color wheel, the clamping hub body plate and front Symbol inner periphery and the front SL clamping hub of the fixed hub In the state where a space surrounded by the peripheral edge restraining portion of the hub is formed , the fastening hub is formed by the screw hole formed in the fastening hub and the screw screw inserted in the screw hole formed in the wheel fixing portion. And the fixing hub is screwed , and the color wheel is pressed and fixed to the fixing hub by a peripheral edge restraining portion of the fastening hub.

A color wheel unit according to a second aspect of the invention is a color wheel in which filters of different colors are arranged, a ring-shaped fixed hub that rotates together with a rotor of a wheel motor, and a color wheel that protrudes from the peripheral edge of a circular plate-shaped hub body plate. A fastening hub having a peripheral edge holding portion in contact with the ring, and the fixed hub includes a ring-shaped hub body portion having an opening in the center, and an inner peripheral edge of the hub body portion with the central axis of the hub body portion as an axis. A cylindrical wheel fixing portion formed so as to protrude and having an outer peripheral diameter substantially the same as the diameter of the fixing opening portion of the color wheel, and the fastening hub has a certain distance from the peripheral edge restraining portion. Oita further has a high fitting tube than the height of the peripheral pressing section in position, the wheel fixing portion of the fixing hub in the fixing opening of the color wheel is fitted through The fitting tube may be fitted and fixed to the inner surface of the wheel fixing portion, the space between the fitting tube of said wheel fixing portion of the distal end portion of the stationary hub and the hub body plate of the clamping hub fastening hub while forming and is characterized characterized in that presses fix the color wheel by the peripheral pressing section of the fastening hub to the fixed hub.
A color wheel unit according to the invention 請 Motomeko 3 is the invention according to claim 2, wherein the inner periphery lower portion of the wheel fixing portion of the fastening hub is formed a step in the hub body portion projects It is characterized by this.
According to a fourth aspect of the present invention, there is provided a color wheel unit including a color wheel having filters of different colors, a ring-shaped fixed hub that rotates together with a rotor of a wheel motor, and a color protruding from a peripheral edge of a circular plate-shaped hub body plate. A fastening hub having a peripheral edge restraining portion in contact with the wheel, and the fixed hub includes a ring-shaped hub main body having an opening in the center, and an inner peripheral edge of the hub main body about the central axis of the hub main body A wheel fixing portion formed so as to protrude from the outer periphery and having a diameter of the outer periphery that is substantially the same as the diameter of the fixing opening of the color wheel, and the wheel fixing portion of the fixing hub is formed in a cylindrical shape, on the inner peripheral edge extension line of the tip of the wheel fixing portion, clamping the diameter of the outer circumference has a cylindrical caulking portion the diameter approximately the same caulking the opening of the hub, the oak The lower the front end of the wheel fixing portion of the part and a step is formed, the above-fitted through the wheel fixing portion of the fixing hub in the fixing opening portion of the color wheel, the clamping hub body plate and front Stories hub tightening state of forming a peripheral restraining portion and the space surrounded by the wheel fixing portion of the front Symbol fixed hub of the hub, the caulking portion is caulked be the tip front side of the hub fastening through the caulking openings It is characterized by being fixed by.

A projector according to the invention of claim 5 includes a light source device, a color wheel unit, a light source side optical system, a display element, a projection side optical system, a cooling fan, a lamp power supply circuit and a projector control means, The color wheel unit includes a color wheel in which filters of different colors are arranged, a ring-shaped fixed hub that rotates together with the rotor of the wheel motor, and a peripheral edge restraining portion that protrudes from the peripheral edge of the circular plate-shaped hub main body plate and contacts the color wheel. A fixing hub, and a pressing screw for compressing and fixing the fastening hub to the fixed hub, the fixed hub having a ring-shaped hub main body having an opening in the center, and a central axis of the hub main body Is formed so as to protrude from the inner peripheral edge of the hub body, and the outer diameter is substantially the same as the diameter of the fixing opening of the color wheel. And a screw hole in which the pressing screw is positioned at the center of the hub main body plate of the tightening hub, and the screw in which the pressing screw is positioned in the center of the wheel fixing portion. holes are formed, the above-fitted through the wheel fixing portion of the fixing said fixing hub in the opening of the color wheel, the inner peripheral portion and the front SL clamping hub body plate and pre SL clamping hub hub of the fixed hub In a state where a space surrounded by the peripheral edge restraining portion is formed , the fastening hub and the screw are formed by the screw hole formed in the fastening hub and the screw screw inserted in the screw hole formed in the wheel fixing portion. By screwing the fixing hub, the color wheel is pressed and fixed to the fixing hub by the peripheral holding portion of the tightening hub .

A projector according to the invention of claim 6 includes a light source device, a color wheel unit, a light source side optical system, a display element, a projection side optical system, a cooling fan, a lamp power supply circuit and a projector control means, The color wheel unit includes a color wheel in which filters of different colors are arranged, a ring-shaped fixed hub that rotates together with the rotor of the wheel motor, and a peripheral edge restraining portion that protrudes from the peripheral edge of the circular plate-shaped hub main body plate and contacts the color wheel. The fixing hub is formed so as to protrude from the inner peripheral edge of the hub body with the central axis of the hub body as an axis. has been the diameter of the outer periphery and a cylindrical wheel fixing portion is substantially the same diameter of the fixing opening and of the color wheel, the clamping hub The peripheral restraining portion from further has a high fitting tube than the height of the peripheral restraining portion in a position at a certain distance, the wheel fixing portion of the fixing hub in the fixing opening of the color wheel is fitted through the The fitting cylinder is fitted and fixed to the inner surface of the wheel fixing portion, and a space is provided between the tip of the wheel fixing portion of the fixing hub, the hub main body plate of the clamping hub, and the fitting cylinder of the clamping hub. In the formed state, the color wheel is pressed and fixed to the fixed hub by the peripheral edge restraining portion of the clamping hub.
A projector according to a seventh aspect of the present invention is the projector according to the sixth aspect , wherein the hub body protrudes from the lower portion of the inner peripheral edge of the wheel fixing portion of the fixed hub to form a step. It is what.
A projector according to the invention of claim 8 includes a light source device, a color wheel unit, a light source side optical system, a display element, a projection side optical system, a cooling fan, a lamp power supply circuit and a projector control means, The color wheel unit includes a color wheel in which filters of different colors are arranged, a ring-shaped fixed hub that rotates together with the rotor of the wheel motor, and a peripheral edge restraining portion that protrudes from the peripheral edge of the circular plate-shaped hub main body plate and contacts the color wheel. The fixing hub is formed so as to protrude from the inner peripheral edge of the hub body with the central axis of the hub body as an axis. has been the diameter of the outer circumference and a wheel fixing portion has a diameter substantially the same fixed opening of the color wheel, wheel hardness of the fixing hub Parts are formed in a cylindrical shape, the wheel fixing portion on the inner peripheral edge extension line of the tip has a diameter and a cylindrical caulking portion is substantially the same caulking openings of clamping the diameter of the outer hub, A step is formed at the lower portion of the crimping portion and the tip of the wheel fixing portion, and the wheel fixing portion of the fixing hub is inserted into the fixing opening of the color wheel, and the hub main body plate of the tightening hub and before Symbol clamping state of forming a peripheral restraining portion and the space surrounded by the wheel fixing portion of the front Symbol fixed hub of the hub, the caulking portion is caulked tip front side of the hub fastening through the caulking openings It is characterized by being fixed by.

  According to the present invention, it is possible to provide a color wheel unit that can prevent the color wheel from being damaged and can be securely fixed to the wheel motor, and a projector that incorporates the color wheel unit.

  The projector 100 of the best mode for carrying out the present invention includes a light source device 210, a color wheel unit 230, a light source side optical system 220, a display element 229, a projection side optical system 252, a cooling fan 190, A lamp power supply circuit 187 and projector control means 181 are provided.

This color wheel unit 230 is a thin disk shape in which a coating film is formed on a glass plate so as to form filters with different fan-shaped colors in the circumferential direction, and a color having a circular fixing opening 234 in the center. A wheel motor 232 having a wheel 231, a motor main body 235, and a rotor 236, and a wheel motor attachment portion 233 for attaching the color wheel 231 to the wheel motor 232, the wheel motor attachment portion 233 has a bottom surface portion of the rotor 236. A fixing hub 239 that is bonded and fixed to the fixing hub 239, and a clamping hub 240 that holds the color wheel 231 between the fixing hub 239, and a space 247 is formed between the fixing hub 239 and the clamping hub 240. Is.

  The fixed hub 239 is a ring-shaped hub body 242 having an opening in the center, and is positioned on the upper surface of the hub body 242. The inner peripheral edge of the hub body 242 is centered on the central axis of the hub body 242. It has a wheel fixing part 243 protruding from the vicinity, the diameter of the outer periphery of the wheel fixing part 243 is substantially the same as the diameter of the fixing opening 234 of the color wheel, and the fastening hub 240 is made of metal with elasticity. A disk-shaped hub main body plate 245 and a peripheral edge restraining portion 246 formed at the lower peripheral edge of the hub main body plate 245 that presses the color wheel 231. A wheel of the fixed hub 239 is provided in the fixing opening 234 of the color wheel 231. The fixing portion 243 penetrates, and the peripheral edge suppressing portion 246 of the fastening hub 240 presses and fixes the color wheel 231 between the fixing hub 239 from above.

  The wheel motor mounting portion 233 has a pressing screw 241 for crimping and fixing the fixing hub 239 and the clamping hub 240, and has a screw hole 244 through which the pressing screw 241 penetrates in the center of the fixing hub 239 and the clamping hub 240. The space surrounded by the inner peripheral edge of the fixed hub 239 such as the wheel fixing portion 243, the hub body plate 245 of the fastening hub 240, and the peripheral edge restraining portion 246 is defined as an elastic space 247, and the pressing screw 241 is screwed. Thus, the color wheel 231 is fixed by crimping the fastening hub 240 and the fixing hub 239.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. The projector according to the present invention has a built-in microcomputer as a projector control means, and has a projection port 123 having a lens cover 121 on the front panel 120 of a case that is a substantially rectangular parallelepiped as shown in FIG. On the top panel 110 of the case are keys and indicators such as a power switch 111, manual image quality adjustment key 113, automatic image quality adjustment key 114, power lamp indicator 112, light source lamp indicator 115, overheat indicator 116, and speaker inside. It has a loudspeaker hole 118 and an open / close lid 119, and a back panel (not shown) has various signal input terminals such as a power connector, a USB terminal connected to a personal computer, a video terminal for inputting image signals, and a mini D-sub terminal. A projector 100 having

  The upper lid 119 has subkeys for fine adjustment of image quality and image and various operation settings of the projector 100. The left side panel 150 of the case has an inlet and the right side panel 140 has an inlet. An exhaust port 145 is provided and has a cooling fan inside.

  In addition, the front panel 170 has a forefoot member 170 that can adjust the amount of protrusion at the front of the bottom panel, and a fixed rear foot member 175 at the rear left and right of the bottom panel. By changing the front height of the projector 100, it is possible to project an image according to the height of the screen.

  As shown in FIG. 2, the projector 100 has a light source device 210 including a discharge lamp 211 such as an ultrahigh pressure mercury lamp, a color wheel unit 230, and a light guide rod as a light source side optical system 220. 224, a plurality of light source side lens groups 226, and a single mirror 228.

  Further, an image is displayed by controlling the reflection of incident light by arranging a plurality of pixels in a matrix in a row direction and a column direction, and a circuit board 180 on which a lamp power supply circuit 187 and a projector control means 181 are attached. The display element 229 is further incorporated with a fixed lens group 253 and a movable lens group 255 which are projection-side optical systems 252 for projecting light emitted from the display element 229 onto a projection surface such as a screen.

The color wheel 231 is formed by depositing red, green, and blue film layers in a fan shape on the surface of a disk-shaped optical glass, for sequentially coloring the light emitted from the light source device 210. A color filter is formed on a plane.
The light guide rod 224 is for making the intensity distribution of the light emitted from the light source device 210 uniform, and the light source side lens group 226 does not diffuse the light transmitted through the light guide rod 224, but the display element 229. For irradiating.

  The circuit board 180 is provided with projector control means 181 using a microcomputer. The control means 181 controls the operation of each circuit in the projector, and the light source device 210 is turned on when the power switch 111 is turned on. The discharge lamp 211 is turned on, and the cooling fan 190 is driven at a rated speed according to the output of the discharge lamp 211, the fan shape and arrangement of the cooling fan 190, and outside air is taken in from the intake port 155 of the left side panel 150, The projector 100 is put into a standby state while air inside is exhausted from the exhaust port 145 of the right side panel 140.

  When the temperature of the discharge lamp 211 rises to a predetermined temperature and the light emission is stabilized, an image can be projected by inputting an image signal. When the power switch 111 is turned off, the discharge lamp 211 is turned off. At the same time, control is performed such that the operation of the cooling fan 190 is continued for a predetermined time of about several minutes by a timer to stop all operations after the inside of the projector 100 is cooled.

  The display element 229 does not include a means for coloring incident light like a color filter, and in this embodiment, a micromirror display element (Digital Micromirror Device) generally abbreviated as DMD is used. .

  The micromirror display element is configured to convert light incident from an incident direction tilted in one direction with respect to the front direction into front-state on-state rays and oblique off-state rays by switching the tilt directions of the plurality of micromirrors. The light is incident on the micromirror tilted in one tilt direction and is turned into an on-state light beam reflected in the front direction by the micromirror, and is reflected in the other tilt direction. The light incident on the tilted micromirror is reflected by the micromirror in an oblique direction to form an off-state light beam, and the off-state light beam is absorbed by the light-absorbing plate. An image is displayed by dark display by reflection on the screen.

  The light source device 210 includes a discharge lamp 211 inside, and an elliptical spherical reflector whose inner surface is a reflecting surface, and an explosion-proof surface is installed in front of the reflector so as to close the opening in front of the reflector. The discharge lamp 211 is connected by a conductive wire so that power can be supplied from the lamp power supply circuit 187, and the discharge lamp 211 emits light and is reflected by the reflecting surface of the reflector to irradiate light in front of the light source device 210. .

  As shown in FIG. 3, the color wheel unit 230 according to this embodiment includes a color wheel 231, a wheel motor 232, and a wheel motor attachment portion 233 that attaches the color wheel 231 to the wheel motor 232.

The color wheel 231 has a thin disk shape in which a plurality of fan-shaped colored and white filters are arranged in the circumferential direction. As shown in FIG. 4, a wheel fixing portion 243 of a fixing hub 239 described later is provided at the center portion. It has a circular fixing opening 234 that penetrates.
The wheel motor 232 includes a motor main body 235 and a rotor 236 that is exposed and rotated in front of the motor main body 235, and is fixed to the motor mounting plate 238 by a motor fixing member 237.

  The wheel motor mounting portion 233 includes a fixing hub 239 for bonding and fixing the bottom surface portion to the rotor 236, a clamping hub 240 for holding the color wheel 231 between the fixing hub 239, a fixing hub 239, and the clamping hub 240. And a pressing screw 241 for pressing and fixing.

  The fixed hub 239 projects from the ring-shaped hub main body part 242 having an opening in the center, and in the vicinity of the inner peripheral edge of the hub main body part 242 so that the central axis of the hub main body part 242 and the central axis thereof are the same. A wheel fixing portion 243 is provided, and an upper portion of the wheel fixing portion 243 is a flat surface and a screw hole 244 in which the pressing screw 241 is located is formed in the center. The diameter of the wheel fixing portion 243 is substantially the same as the diameter of the fixing opening 234 included in the color wheel 231.

  The fastening hub 240 is made of a metal having elasticity, and is a disc-shaped hub body plate 245 having a screw hole 244 in which the pressing screw 241 is located at the center, and a thick tube at the lower periphery of the hub body plate 245. And a peripheral edge restraining portion 246 that presses the color wheel 231 formed in a shape.

  The color wheel unit 230 is configured such that the bottom surface portion of the hub main body portion 242 of the fixed hub 239 is bonded and fixed to the upper portion of the rotor 236 of the wheel motor 232, and the fixing opening of the color wheel 231 is fixed to the wheel fixing portion 243 of the fixed hub 239. 234 is inserted, and the color wheel 231 is adhered and fixed to the upper surface of the hub main body 242 of the fixed hub 239. The fastening hub 240 is covered from the upper part, and the peripheral edge restraining part 246 of the fastening hub 240 presses the color wheel 231. The color wheel 231 is sandwiched between the fixing hub 239 and the fastening hub 240 by being screwed into the screw hole 244 of the fixing hub 239 from the upper part of the fastening hub 240 with the pressing screw 241.

  At this time, an elastic space 247 that is a space surrounded by the hub body plate 245 of the fastening hub 240, the peripheral edge restraining portion 246, and the wheel fixing portion 243 of the fixing hub 239 is formed. When 239 and the fastening hub 240 are compressed, the hub body plate 245 of the fastening hub 240 can be elastically deformed by the space of the elastic space 247.

  The color wheel unit 230 is arranged in the housing of the projector so that a part of the filter of the color wheel 231 in the circumferential direction is interposed in the optical path of the emitted light from the light source device 210.

  The light guide rod 224 is disposed at a position where the incident surface faces the exit side of the color wheel 231 and guides the light incident from the incident surface while being reflected by the reflective film on the inner peripheral surface of the rod, and is uniform from the exit surface. The light is emitted as intensity distribution light.

  The mirror 228 of the light source side optical system 220 reflects the light emitted from the light source device 210 and transmitted through the light guide rod 224, the color wheel 231 and the light source side lens group 226 toward the display element 229. Light is projected onto the display element 229 from a direction inclined in one direction with respect to the front direction.

  The projection-side optical system 252 includes a fixed lens barrel that includes a fixed lens group 253, and a movable lens group 255 that is engaged with the fixed lens barrel and that can move forward and backward in the axial direction by a rotating operation. The projection-side optical system 252 includes a lens barrel and forms a zoom lens by a combination of a plurality of lenses incorporated in these lens barrels.

  Thus, the projector 100 sequentially emits light from the light source device 210 through the color wheel 231 by emitting light in one direction and rotating the color wheel 231 at a high speed of about 120 times per second. Then, the light incident on the light source side optical system 220 can be projected toward the display element 229 by the lens and the mirror 228 as the light source side optical system 220 with the intensity distribution made uniform by the light guide rod 224. .

  When a predetermined time elapses after the power is turned on and the light from the light source device 210 is stabilized, the monochromatic image of each color is displayed on the display element 229 in synchronization with the projection period of each color light transmitted through the color wheel. By sequentially writing data, a single-color image of each color is sequentially formed on the display element 229 by the on-state light beam reflected in the front direction of the display element 229, and single-color image light of each color sequentially emitted from the display element 229 is projected on the projection side. The image is enlarged by the lens groups 253 and 255 of the optical system 252 and projected onto a projection surface, and a full-color image in which three color single-color images are superimposed is displayed on the projection surface.

  According to the present invention, the fixing hub 239 and the fastening hub 240 are used as the wheel motor mounting portion 233 for fixing the color wheel 231 to the wheel motor 232, and the color wheel 231 is sandwiched between the fixing hub 239 and the fastening hub 240. By adopting the shape, the color wheel 231 can be firmly fixed as compared with the case where the color wheel 231 is fixed only by adhesion, and the color wheel 231 is prevented from being detached from the wheel motor 232 during the high-speed rotation of the color wheel 231. it can.

  Further, the fastening hub 240 is formed of a metal having elasticity, and further, the elastic space 247 is formed between the fastening hub 240 and the fixing hub 239, so that the fixing hub 239 and the fastening hub 240 are strengthened by the pressing screw 241. Even when screwed, the tightening hub 240 can be elastically deformed by the space of the elastic space 247 to absorb the pressure applied to the color wheel 231, and the color wheel 231 can be prevented from being damaged.

  Furthermore, since the peripheral edge restraining portion 246 that presses the color wheel 231 has a thick cylindrical shape, the force can be distributed and applied without applying force to one place of the color wheel 231. Can be prevented from being damaged.

  In the past, the color wheel 231 may be detached from the wheel motor 232 during high-speed rotation. However, since the color wheel 231 can be securely and firmly fixed, the color wheel 231 can be prevented from coming off. The projector 100 can be provided that can prevent the color wheel 231 from being damaged even when it is strongly fixed to prevent the wheel motor 232 from coming off, and the assembly is facilitated.

  Next, a modified example of the color wheel unit 230 used in this embodiment will be described. As shown in FIG. 5, the color wheel unit 230 includes a color wheel 231, a wheel motor 232, and a wheel motor attachment portion 233 that attaches the color wheel 231 to the wheel motor 232. Since the configuration of the color wheel 231 and the wheel motor 232 is the same as that described above, a detailed description thereof will be omitted.

  The wheel motor mounting portion 233 of the present modification includes a fixing hub 239 for bonding and fixing the bottom surface portion to the rotor 236, and a tightening hub 240 for tightening and fixing the color wheel 231 between the fixing hub 239.

  The fixed hub 239 has a ring-shaped hub main body 242 having an opening in the center, and a cylindrical wheel fixed around the central axis of the hub main body 242 that protrudes from the upper surface of the hub main body 242 near the inner periphery. Part 243. The diameter of the outer periphery of the wheel fixing portion 243 is formed to be substantially the same as the diameter of the fixing opening 234 included in the color wheel 231. Further, the hub main body portion 242 projects inward from the inner peripheral edge of the wheel fixing portion 243, and a step is formed between the wheel fixing portion 243 and the hub main body portion 242. The inner peripheral surface of the opening of the hub main body 242 and the inner peripheral surface of the wheel fixing portion 243 may be formed as the same surface without forming the step.

  The fastening hub 240 is made of a metal having elasticity, and has a disk-shaped hub main body plate 245 and a thick-walled cylindrical peripheral member formed at the lower portion of the outer peripheral edge of the hub main body plate 245 that presses the color wheel 231. Part 246. In addition, a thin cylindrical fitting cylinder 248 that is higher than the height of the circumferential edge restraining part 246 is provided at a certain distance from the inner circumferential edge of the circumferential edge restraining part 246, and the diameter of the outer periphery of the fitting cylinder 248 is the wheel fixing part. The diameter of the inner periphery of 243 is substantially the same as that of the inner periphery of the wheel fixing portion 243.

  In the color wheel unit 230, the hub body 242 of the fixed hub 239 is bonded and fixed to the upper part of the rotor 236 of the wheel motor 232, and the fixing opening 234 of the color wheel 231 is passed through the wheel fixing part 243 of the fixed hub 239. The color wheel 231 is bonded and fixed to the hub main body 242 of the fixed hub 239, and the tightening hub 240 is arranged on the upper portion thereof, and the color wheel 231 is interposed between the peripheral edge restraining portion 246 and the hub main body 242 of the fixed hub 239. The hub body plate 245 of the clamping hub 240 is pressed from above, and the fitting cylinder 248 of the clamping hub 240 is fitted and fixed to the wheel fixing portion 243 of the fixing hub 239.

  At this time, the hub body plate 245 of the fastening hub 240 and the inner surface of the fitting cylinder 248 are covered, and further, the hub body plate 245 of the fastening hub 240 and the fitting cylinder 248, and the tip of the wheel fixing portion 243 of the fixing hub 239. A space surrounded by the portion is formed as an elastic space 247.

  According to this modification, the fastening hub 240 is formed of a metal having elasticity, and further, the elastic space 247 covered with the inner surface of the hub body plate 245 and the fitting cylinder 248 of the fastening hub 240, and the fastening hub 240 By forming the space covered by the hub body plate 245, the fitting cylinder 248, and the tip of the wheel fixing portion 243 of the fixed hub 239, the color wheel 231 can be firmly held by pressing the fastening hub 240. In addition, since the tightening hub 240 is elastically deformed by the elastic space 247 and the space to reduce the pressure applied to the color wheel 231, it is possible to prevent the color wheel 231 from being damaged.

  Still another modification of the color wheel unit 230 will be described. As shown in FIG. 6, the color wheel unit 230 includes a color wheel 231, a wheel motor 232, and a wheel motor attachment portion 233 that attaches the color wheel 231 to the wheel motor 232. Since the configuration of the color wheel 231 and the wheel motor 232 is the same as that described above, a detailed description thereof will be omitted.

  The wheel motor mounting portion 233 of the present modification includes a fixing hub 239 that bonds and fixes the bottom surface to the rotor 236, and a tightening hub 240 that fastens and fixes the color wheel 231 between the fixing hub 239. Yes.

  The fixed hub 239 has a ring-shaped hub main body portion 242 having an opening in the center, and a thick cylindrical shape that is located on an extension line of the inner peripheral surface of the opening of the hub main body portion 242 and has the same inner peripheral surface. A wheel fixing portion 243 and a thin cylindrical caulking portion 249 that is positioned above the wheel fixing portion 243 and has the same inner peripheral surface as the wheel fixing portion 243 are provided. The diameter of the outer periphery of the wheel fixing portion 243 is substantially the same as the diameter of the fixing opening 234 of the color wheel 231 and the outer diameter of the caulking portion 249 is substantially the same as the diameter of the opening of the fastening hub 240 described later. Is formed.

  The fastening hub 240 is made of metal having elasticity, and presses the color wheel 231 and the hub main body plate 245 having a caulking opening 250 through which the caulking portion 249 of the fixed hub 239 penetrates in the center. And a peripheral edge restraining portion 246 formed at a lower portion of the outer peripheral edge of the hub body plate 245 to form an elastic space 247 surrounded by the circumferential edge restraining portion 246 and the hub body plate 245.

  In the color wheel unit 230, the hub body 242 of the fixed hub 239 is bonded and fixed to the upper part of the rotor 236 of the wheel motor 232, and the fixing opening 234 of the color wheel 231 is passed through the wheel fixing part 243 of the fixed hub 239. The fastening hub 240 is disposed so that the caulking portion 249 penetrates the caulking opening 250 of the fastening hub 240 while being bonded and fixed to the hub body 242 of the fixing hub 239.

  Then, the hub body plate 245 of the tightening hub 240 is pressed from above so that the color wheel 231 is sandwiched between the peripheral edge holding portion 246 and the hub body portion 242 of the fixed hub 239, and the caulking portion 249 of the fixed hub 239 is pressed. The shape is fixed by pushing the tip wide and caulking.

  Further, the height of the wheel fixing portion 243 of the fixing hub 239 is formed to be larger than the thickness of the color wheel 231 and lower than the total value of the thickness of the color wheel 231 and the height of the peripheral edge restraining portion 246 of the fastening hub 240. It is.

  At this time, an elastic space 247 surrounded by the hub body plate 245 of the fastening hub 240, the peripheral edge restraining portion 246, and the wheel fixing portion 243 of the fixing hub 239 is formed, and when the fastening hub 240 is pressed, the color wheel 231 can be firmly fixed.

According to this modified example, the fastening hub 240 is formed of a metal having elasticity, and further, the elastic space 247 is formed in the fastening hub 240, whereby the crimping portion 249 of the fixed hub 239 is crimped, thereby the color wheel 231. The clamping hub 240 can be deformed by the space of the elastic space 247 to reduce the pressure applied to the color wheel 231 and prevent the color wheel 231 from being damaged.
In addition, this invention is not limited to the form of the above Example, A change and improvement are possible freely in the range which does not deviate from the summary of invention.

1 is a perspective view of a projector according to an embodiment of the invention. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a simplified perspective view with a top surface of a projector according to an embodiment of the present invention removed. The figure showing the positional relationship of the wheel unit which concerns on the Example of this invention. Sectional drawing of the wheel unit which concerns on the Example of this invention. Sectional drawing of the other wheel unit which concerns on the Example of this invention. Sectional drawing of another wheel unit which concerns on the Example of this invention.

Explanation of symbols

100 Projector 110 Top panel
111 Power switch 112 Power lamp indicator
113 Manual image quality adjustment key 114 Automatic image quality adjustment key
115 Light source lamp indicator 116 Overheat indicator
118 Loudspeaker 119 Open / close lid
120 Front panel 121 Lens cover
123 Projection port 140 Right side panel
145 Exhaust port 150 Left side panel
155 Air intake 170 Forefoot member
175 Rear foot member 180 Circuit board
181 Projector control means 187 Lamp power circuit
190 Cooling fan 210 Light source device
211 Discharge lamp 220 Light source side optical system
224 Light guide rod 226 Light source side lens group
228 Mirror 229 Display element
230 Color wheel unit 231 Color wheel
232 Wheel motor 233 Wheel motor mounting
234 Fixing opening 235 Motor body
236 Rotor 237 Motor fixing member
238 Motor mounting plate 239 Fixed hub
240 Tightening hub 241 Pressing screw
242 Hub body 243 Wheel fixing part
244 Screw hole 245 Hub body plate
246 Perimeter restraint 247 Elastic space
248 Mating cylinder 249 Caulking section
250 Caulking opening 252 Projection side optical system
253 Fixed lens group 255 Movable lens group

Claims (8)

A color wheel with filters of different colors,
A ring-shaped fixed hub that rotates with the rotor of the wheel motor;
A tightening hub provided with a peripheral edge restraining portion that protrudes from the peripheral edge of the circular plate-shaped hub body plate and contacts the color wheel;
A pressing screw for compressing and fixing the fastening hub to the fixing hub;
Have
The fixed hub has a ring-shaped hub body having an opening in the center, and is formed so as to protrude from the inner periphery of the hub body with the central axis of the hub body as an axis. A wheel fixing portion that is substantially the same as the diameter of the opening for use,
A screw hole in which the pressing screw is located is formed at the center of the hub body plate of the fastening hub,
A screw hole in which the pressing screw is located is formed at the center of the wheel fixing portion,
A space surrounded by an inner peripheral edge of the fixed hub, a hub body plate of the tightening hub, and a peripheral edge restraining part of the tightening hub, the wheel fixing portion of the fixed hub penetrating the fixing opening of the color wheel. while forming, by screwing the fastening hub and the clamping hub by said fastening the pressing screw which is inserted into the threaded terminal holes formed in the screw hole and the wheel fixing portion formed in the hub, The color wheel unit, wherein the color wheel is pressed and fixed to the fixed hub by a peripheral edge holding portion of the tightening hub. A color wheel with filters of different colors,
A ring-shaped fixed hub that rotates with the rotor of the wheel motor;
A tightening hub having a peripheral edge restraining portion that protrudes from the peripheral edge of the circular plate-shaped hub main body plate and contacts the color wheel;
The fixed hub has a ring-shaped hub body having an opening in the center, and is formed so as to protrude from the inner periphery of the hub body with the central axis of the hub body as an axis. A cylindrical wheel fixing portion that is substantially the same as the diameter of the opening for use,
The tightening hub further includes a fitting cylinder higher than the height of the peripheral edge restraining portion at a certain distance from the peripheral edge restraining portion, and the wheel fixing portion of the fixing hub is disposed in the fixing opening of the color wheel. Is inserted, and the fitting cylinder is fitted and fixed to the inner surface of the wheel fixing portion,
In a state where a space is formed between the distal end portion of the wheel fixing portion of the fixing hub, the hub main body plate of the clamping hub, and the fitting tube of the clamping hub, the color wheel is inserted into the collar wheel by a peripheral edge restraining portion of the clamping hub. A color wheel unit characterized by being pressed and fixed to a fixed hub.   The color wheel unit according to claim 2, wherein the hub main body protrudes from the inner peripheral lower portion of the wheel fixing portion of the fixed hub to form a step. A color wheel with filters of different colors,
A ring-shaped fixed hub that rotates with the rotor of the wheel motor;
A tightening hub having a peripheral edge restraining portion that protrudes from the peripheral edge of the circular plate-shaped hub main body plate and contacts the color wheel;
The fixed hub has a ring-shaped hub body having an opening in the center, and is formed so as to protrude from the inner periphery of the hub body with the central axis of the hub body as an axis. A wheel fixing portion that is substantially the same as the diameter of the opening for use,
The wheel fixing portion of the fixing hub is formed in a cylindrical shape, and the diameter of the outer periphery is substantially the same as the diameter of the caulking opening of the tightening hub on the inner peripheral extension line at the tip of the wheel fixing portion. A step is formed at a lower portion of the crimping portion and a tip of the wheel fixing portion, and the wheel fixing portion of the fixing hub is inserted into the fixing opening of the color wheel, and the tightening is performed. The caulking portion is formed by caulking the tip penetrating the caulking opening in a state where a space surrounded by the hub body plate of the hub, the peripheral edge restraining portion of the fastening hub, and the wheel fixing portion of the fixing hub is formed. A color wheel unit , wherein a fastening hub is fixed and the color wheel is pressed and fixed by a peripheral edge restraining portion of the fastening hub . A light source device;
A color wheel unit,
A light source side optical system;
A display element;
A projection-side optical system;
A cooling fan,
Lamp power circuit and projector control means,
The color wheel unit is
A color wheel with filters of different colors,
A ring-shaped fixed hub that rotates with the rotor of the wheel motor;
A tightening hub provided with a peripheral edge restraining portion that protrudes from the peripheral edge of the circular plate-shaped hub body plate and contacts the color wheel;
A pressing screw for compressing and fixing the fastening hub to the fixing hub,
The fixed hub has a ring-shaped hub body having an opening in the center, and is formed so as to protrude from the inner periphery of the hub body with the central axis of the hub body as an axis. A wheel fixing portion that is substantially the same as the diameter of the opening for use,
A screw hole in which the pressing screw is located is formed at the center of the hub body plate of the fastening hub,
A screw hole in which the pressing screw is located is formed at the center of the wheel fixing portion,
A space surrounded by an inner peripheral edge of the fixed hub, a hub body plate of the tightening hub, and a peripheral edge restraining part of the tightening hub, the wheel fixing portion of the fixed hub penetrating the fixing opening of the color wheel. while forming, by screwing the fastening hub and the clamping hub by said fastening the pressing screw which is inserted into the threaded terminal holes formed in the screw hole and the wheel fixing portion formed in the hub, A projector characterized in that the color wheel is pressed and fixed to a fixed hub by a peripheral edge holding portion of the tightening hub. A light source device;
A color wheel unit,
A light source side optical system;
A display element;
A projection-side optical system;
A cooling fan,
Lamp power circuit and projector control means,
The color wheel unit is
A color wheel with filters of different colors,
A ring-shaped fixed hub that rotates with the rotor of the wheel motor;
A tightening hub provided with a peripheral edge restraining portion that protrudes from the peripheral edge of the circular plate-shaped hub body plate and contacts the color wheel;
Have
The fixed hub has a ring-shaped hub body having an opening in the center, and is formed so as to protrude from the inner periphery of the hub body with the central axis of the hub body as an axis. A cylindrical wheel fixing portion that is substantially the same as the diameter of the opening for use,
The tightening hub further has a fitting cylinder higher than the height of the peripheral edge restraining part at a certain distance from the peripheral edge restraining part,
A wheel fixing portion of the fixing hub is inserted through the fixing opening of the color wheel, and the fitting cylinder is fitted and fixed to the inner surface of the wheel fixing portion,
The color wheel is fixed by the peripheral edge restraining portion of the clamping hub in a state where a space is formed between the tip of the wheel fixing portion of the fixing hub, the hub body plate of the clamping hub, and the fitting cylinder of the clamping hub. A projector characterized by being pressed and fixed to a hub.   The projector according to claim 6, wherein the hub body protrudes from the inner peripheral lower portion of the wheel fixing portion of the fixed hub to form a step. A light source device;
A color wheel unit,
A light source side optical system;
A display element;
A projection-side optical system;
A cooling fan,
Lamp power circuit and projector control means,
The color wheel unit is
A color wheel with filters of different colors,
A ring-shaped fixed hub that rotates with the rotor of the wheel motor;
A tightening hub having a peripheral edge restraining portion that protrudes from the peripheral edge of the circular plate-shaped hub main body plate and contacts the color wheel;
The fixed hub has a ring-shaped hub body having an opening in the center, and is formed so as to protrude from the inner periphery of the hub body with the central axis of the hub body as an axis. A wheel fixing portion that is substantially the same as the diameter of the opening for use,
The wheel fixing portion of the fixing hub is formed in a cylindrical shape, and the diameter of the outer periphery is substantially the same as the diameter of the caulking opening of the tightening hub on the inner peripheral extension line at the tip of the wheel fixing portion. There is a caulking part, and a step is formed at the lower part of the caulking part and the tip of the wheel fixing part,
A space surrounded by a hub body plate of the clamping hub, a peripheral edge restraining part of the clamping hub, and a wheel fixing part of the fixing hub, the wheel fixing part of the fixing hub penetrating the fixing opening of the color wheel. In the state in which the caulking portion is formed, the crimping hub fixes the fastening hub by caulking the tip penetrating through the caulking opening, and the color wheel is pressed and fixed by the peripheral pressing portion of the fastening hub. Projector.

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