JP6264017B2 - Cooling device and projector - Google Patents

Description

  The present invention relates to a cooling device and a projector.

  Conventionally, a projector that modulates light emitted from a light source according to image information and projects the modulated light onto a screen or the like is known. Since the optical components and the like inside the projector generate heat by receiving light from the light source, the projector includes a cooling fan, and the optical components are cooled by air blown from the cooling fan. Therefore, a structure for attaching the cooling fan to the projector has been proposed (see, for example, Patent Document 1).

The projector described in Patent Document 1 includes a main body case that forms an outline of the projector, a centrifugal fan as a cooling fan, a suction-side duct located on the suction port side of the centrifugal fan, and an elastic member. The main body case has a lower case, and the lower case is provided with a positioning and fixing portion. The centrifugal fan is provided with a pair of positioning and fixing portions protruding from the outer peripheral surface. In addition, a pair of support protrusions project from the lower case and the suction duct toward the centrifugal fan, and an elastic member is attached to the front end surfaces of the pair of support protrusions.
The centrifugal fan described in Patent Document 1 is sandwiched between support protrusions having a peripheral edge attached to an elastic member at the tip, and the pair of positioning fixing parts are fixed to the positioning fixing parts of the lower case with screws or the like. It is configured as follows.

JP 2009-53265 A

  However, in the fan mounting structure described in Patent Document 1, although the peripheral portion of the centrifugal fan is supported via an elastic member, the pair of positioning fixing portions of the centrifugal fan is the positioning fixing portion of the lower case. It is conceivable that the vibration of the centrifugal fan is directly transmitted to the lower case through the positioning fixing portions of both members. That is, the fan mounting structure described in Patent Document 1 is an insufficient structure for reducing fan vibration, that is, noise.

  SUMMARY An advantage of some aspects of the invention is to solve at least a part of the problems described above, and the invention can be implemented as the following forms or application examples.

  Application Example 1 A cooling device according to this application example is provided in at least one of a cooling fan that blows cooling air, a holding member that holds the cooling fan, and the cooling fan and the holding member, A protrusion projecting from one side toward the other, and an elastic member partially sandwiched between the protrusion and the other, wherein the cooling fan is attached to the holding member via the elastic member. It is retained.

  According to this configuration, the protrusion is provided on at least one of the cooling fan and the holding member, and a part of the elastic member is sandwiched between the protrusion and the other. The cooling fan is held by the holding member via the elastic member. As a result, the cooling fan and the holding member are not in direct contact with each other, and the cooling fan can be held with a stable force. Therefore, it is possible to provide a cooling device that can suppress the vibration of the holding member due to the driving of the cooling fan and can reduce noise.

  Application Example 2 In the cooling device according to the application example, it is preferable that the elastic member is attached to the protruding portion.

  According to this structure, the worker who assembles the cooling device can attach the elastic member with the protruding portion as a guide. Accordingly, the elastic member can be easily disposed at a predetermined position, and the elastic member can be securely held between one of the cooling fan and the holding member and the protruding portion, and the cooling fan can be held by the holding member. .

  Application Example 3 In the cooling device according to the application example, the cooling device includes a protrusion group in which at least three protrusions are arranged side by side, and the elastic member is formed of the protrusion group in a direction in which the protrusions are arranged in parallel. Preferably, it has a width smaller than the width and is affixed to the protruding portion.

According to this configuration, at least three protrusions are arranged in parallel in the protrusion group, and the elastic member has a width smaller than the width of the protrusion group. Accordingly, an operator who assembles the cooling device can attach the elastic member with reference to the protruding portion located outside in the protruding group, and can securely hold the elastic member between the protruding portions inside the protruding group. Therefore, the elastic member can be easily arranged at a predetermined position, and the cooling fan can be reliably held by the holding member via the elastic member.
Further, since the elastic member is affixed to the plurality of projecting portions, the stress applied to the cooling fan and the holding member can be dispersed and the cooling fan can be held by the holding member. Furthermore, since the contact area between the elastic member and the protruding portion is reduced, vibration transmission from the cooling fan to the holding member can be reduced, and the cooling device can be made quieter.

  Application Example 4 In the cooling device according to the application example described above, the cooling fan includes a first outer surface and a second outer surface along surfaces intersecting a central axis of the rotating blades, the first outer surface, and the second outer surface. The holding member has a first inner surface, a second inner surface, and a third inner surface that respectively face the first outer surface, the second outer surface, and the third outer surface, The protruding portion is provided on one of the third outer surface and the third inner surface, and the elastic member is disposed between the protruding portion and the other of the third outer surface and the third inner surface, and the first outer surface and the first inner surface. It is preferable to be sandwiched between one inner surface and between the second outer surface and the second inner surface.

  According to this configuration, the cooling fan is held by the holding member via the elastic member in the central axis direction and the direction intersecting the central axis. As a result, the cooling fan is more stably held on the holding member, so that the cooling device can be further silenced.

  Application Example 5 In the cooling device according to the application example, the protrusion is provided on the third outer surface, and at least one of the first outer surface and the second outer surface has a shape that follows the shape of the protrusion. The recognition mark is preferably formed.

  According to this configuration, the cooling fan is provided with the protruding portion on the third outer surface, and the recognition mark is formed on at least one of the first outer surface and the second outer surface. As a result, an operator who assembles the cooling device can attach the elastic member with the recognition mark as a guideline, so that the elastic member is securely sandwiched between the protruding portion and the holding member in the central axis direction and the direction intersecting the central axis. The cooling fan can be held by the holding member.

  Application Example 6 In the cooling device according to the application example described above, it is preferable that the cooling fan is a sirocco fan that discharges cooling air taken from the central axis direction of the blades in a rotational tangential direction.

  According to this configuration, since the cooling device includes the sirocco fan as the cooling fan, it can blow cooling air having a higher discharge pressure than the axial fan. As a result, it is possible to provide a cooling device capable of blowing intensive cooling air to the cooling target while reducing the noise.

  Application Example 7 In the cooling device according to the application example described above, the cooling fan covers a region where the blades rotate, and has a case main body portion formed with an intake port for taking in cooling air, and protrudes from the case main body portion. A discharge port forming portion provided with a discharge port through which cooling air is discharged, and further comprising an auxiliary elastic member affixed to an outer peripheral edge of the discharge port forming portion, wherein the holding member includes the auxiliary elastic member It is preferable to have a locking part that locks the affixed discharge port forming part.

  According to this configuration, the auxiliary elastic member is attached to the outer peripheral edge of the discharge port forming portion of the cooling fan, and the above-described locking portion is provided on the holding member. Thereby, the cooling fan can be arranged on the holding member with high accuracy. Therefore, the elastic member can be securely held at a predetermined position between one of the cooling fan and the holding member and the projecting portion, and the cooling air discharged from the cooling fan can be reliably discharged in a predetermined direction. it can. Therefore, the cooling fan can be reliably held by the holding member and the cooling air can be efficiently blown to the object to be cooled.

  Application Example 8 In the cooling device according to the application example, it is preferable that the holding member has a guide portion that guides air discharged from the cooling fan.

  According to this configuration, since the holding member has the guide portion, the cooling air can be guided in a predetermined direction from the vicinity of the discharge port from which the cooling air of the cooling fan is discharged without using other members. it can.

  Application Example 9 A projector according to this application example includes a light source, a light modulation device that modulates light emitted from the light source, a projection optical device that projects light modulated by the light modulation device, and And a cooling device as described above.

  According to this configuration, since the projector includes the above-described cooling device, it is possible to provide a projector capable of reducing the noise while efficiently cooling the object to be cooled.

  Application Example 10 In the projector according to the application example, it is preferable that the cooling device blows cooling air to the light source.

  According to this configuration, since the cooling device blows the cooling air to the light source that is a main heat source in the projector, even if the cooling fan is driven to increase the wind force of the cooling air to be blown, the noise of the cooling device Can be suppressed. Therefore, it is possible to provide a projector capable of efficiently cooling the inside of the projector and reducing noise.

1 is a schematic diagram showing a schematic configuration of a projector according to an embodiment. The perspective view of the cooling device of this embodiment. The disassembled perspective view of the cooling device of this embodiment. The figure which shows the cooling fan of this embodiment. Sectional drawing of the cooling device of this embodiment.

Hereinafter, the projector according to the present embodiment will be described with reference to the drawings.
The projector according to the present embodiment modulates light emitted from a light source according to image information, and enlarges and projects the modulated light onto a projection surface such as a screen.

[Main components of the projector]
FIG. 1 is a schematic diagram illustrating a schematic configuration of a projector 1 according to the present embodiment.
As shown in FIG. 1, the projector 1 supplies electric power to an exterior casing 2 constituting an exterior, a control unit (not shown), an optical unit 3 having a light source device 31, a cooling unit 4, and the light source device 31. A power supply (not shown) is provided.

  Although detailed description is omitted, the exterior casing 2 is composed of a plurality of members such as an upper case that forms an upper part and a lower case that forms a lower part. An exhaust port for exhausting the air to the outside is provided.

  The control unit includes a CPU (Central Processing Unit), a ROM (Read Only Memory), a RAM (Random Access Memory), and the like, and functions as a computer, and is related to control of the operation of the projector 1, for example, image projection. Control and control for driving the cooling unit 4 are performed.

The optical unit 3 optically processes and projects the light emitted from the light source device 31 under the control of the control unit.
As shown in FIG. 1, in addition to the light source device 31, the optical unit 3 includes an integrator illumination optical system 32, a color separation optical system 33, a relay optical system 34, an optical device 35, a projection lens 36 as a projection optical device, and these. The optical component casing 37 is disposed at a predetermined position on the optical path.

  The light source device 31 includes a discharge-type light source 311, such as an ultra-high pressure mercury lamp or a metal halide lamp, a reflector 312, a collimating lens 313, and a light source casing 314. The light source device 31 reflects the light emitted from the light source 311 by the reflector 312, aligns the emission direction by the collimating lens 313, and emits the light toward the integrator illumination optical system 32.

The integrator illumination optical system 32 includes a first lens array 321, a second lens array 322, a polarization conversion element 323, and a superimposing lens 324.
The first lens array 321 includes a plurality of small lenses and divides the light from the light source device 31 into a plurality of partial light beams. The second lens array 322 and the superimposing lens 324 collect a plurality of partial light beams from the first lens array 321 and superimpose them on a light modulation device 351 described later of the optical device 35. The polarization conversion element 323 includes a polarization separation film and a phase difference plate, and aligns light having a random polarization direction emitted from the light source device 31 with polarized light having a predetermined direction.

  The color separation optical system 33 includes two dichroic mirrors 331 and 332, and a reflection mirror 333. The light emitted from the integrator illumination optical system 32 is red light (hereinafter referred to as “R light”), green light (hereinafter referred to as “light”). G light ”) and blue light (hereinafter referred to as“ B light ”).

  The relay optical system 34 includes an incident side lens 341, a relay lens 343, and reflection mirrors 342 and 344, and has a function of guiding the R light separated by the color separation optical system 33 to a liquid crystal panel for R light. The optical unit 3 has a configuration in which the relay optical system 34 guides the R light. However, the configuration is not limited thereto, and may be configured to guide the B light, for example.

The optical device 35 is a light modulation device 351 provided for each color light (the light modulation device for R light is 351R, the light modulation device for G light is 351G, and the light modulation device for B light is 351B), And a cross dichroic prism 352 as a color synthesizing optical device.
Each light modulation device 351 includes a transmissive liquid crystal panel, an incident-side polarizing plate disposed on the light incident side of the liquid crystal panel, and an emission-side polarizing plate disposed on the light emitting side of the liquid crystal panel, and each color light is imaged. Modulate according to information.

  The cross dichroic prism 352 has a substantially square shape in plan view in which four right angle prisms are bonded together, and two dielectric multilayer films are formed on the interface where the right angle prisms are bonded together. In the cross dichroic prism 352, the dielectric multilayer film reflects R light and B light modulated by the light modulation devices 351R and 351B, and transmits G light modulated by the light modulation device 351G. Synthesize modulated light.

  The projection lens 36 includes a plurality of lenses, and enlarges and projects the light combined by the cross dichroic prism 352 on the screen.

The cooling unit 4 includes an intake fan 41, an exhaust fan 42, and a cooling device 5.
The intake fan 41 has a function of taking in external air from an intake port (not shown) of the exterior housing 2, and the air taken in from the outside is optically connected to the optical modulator 351 or the like by a duct member (not shown). The parts are blown.
The cooling device 5 includes a cooling fan 51 and blows cooling air to the light source 311.
The exhaust fan 42 is blown by the intake fan 41 and the cooling fan 51, and cools each member and discharges warm air to the outside from an exhaust port (not shown) of the exterior housing 2.

[Configuration of cooling device]
Here, the cooling device 5 will be described in detail.
FIG. 2 is a perspective view of the cooling device 5, (a) is a view as seen from one side, and (b) is a view as seen from the other side. FIG. 3 is an exploded perspective view of the cooling device 5, (a) is a view seen from one side, and (b) is a view seen from the other side.
As shown in FIGS. 2 and 3, the cooling device 5 includes a holding member 6, a cushion member 7 as an elastic member, and a cushion member 8 as an auxiliary elastic member in addition to the cooling fan 51.

4A and 4B are diagrams showing the cooling fan 51, where FIG. 4A is a view seen from one side, FIG. 4B is a view seen from the other side, and FIG. 4C is a plan view.
As shown in FIG. 4, the cooling fan 51 has a blade (not shown) and a fan case 52 in which the blade is accommodated, and discharges air taken in from the direction of the central axis 51 </ b> S of the rotating blade in the rotational tangential direction. Consists of fans.

The fan case 52 includes a case main body 521 that covers a region where the blades rotate, and a discharge port forming portion 522 that protrudes from the case main body 521 and is provided with a discharge port 52e through which air is discharged.
The case main body 521 is formed in a columnar shape, and has a third curved surface connected to the first outer surface 521A and the second outer surface 521B along the surface intersecting the central axis 51S, and the first outer surface 521A and the second outer surface 521B. And an outer surface 521C.
The first outer surface 521A and the second outer surface 521B are each provided with an intake port 521i for taking in air. That is, the cooling fan 51 is a double-sided intake type sirocco fan.
As shown in FIG. 3B, the discharge port forming part 522 is formed in a rectangular shape in plan view.

As shown in FIG. 4, two protruding groups 5211G are provided on the third outer surface 521C. Each protrusion group 5211G has a plurality of protrusions 5211 extending from the first outer surface 521A side toward the second outer surface 521B side and arranged in parallel at substantially equal intervals.
As shown in FIG. 4C, the two protruding groups 5211 </ b> G are formed on substantially the opposite side of the discharge port forming portion 522 in the case main body portion 521. Specifically, the two protruding groups 5211G are, as viewed from the first outer surface 521A side, the first protruding group 5211a located on the virtual line VL connecting the approximate center of the edge of the discharge port 52e and the central axis 51S, and It has the 2nd protrusion group 5211b located in the same side as the rotation direction (CCW direction in FIG.4 (c)) with respect to the virtual line VL.

In the present embodiment, each of the first protrusion group 5211a and the second protrusion group 5211b includes three protrusion portions 5211. Each protrusion 5211 has, for example, a width dimension of 2.5 to 3 mm and a height dimension (protrusion dimension from the third outer surface 521C) of 1 to 1.5 mm. The interval is formed at 1 to 1.5 mm. Note that the first protrusion group 5211a and the second protrusion group 5211b may be constituted by a number of protrusion parts 5211 other than three, and the shape of the protrusion parts 5211 may be formed with dimensions other than those described above.
In the present embodiment, the protrusion 5211 is provided on the cooling fan 51, but may be provided on the holding member 6. That is, the protrusion 5211 is formed on at least one of the cooling fan 51 and the holding member 6 so as to protrude from one to the other.

Further, as shown in FIG. 4B, the second outer surface 521B is provided with recognition marks Ma respectively corresponding to the first protruding group 5211a and the second protruding group 5211b.
The recognition mark Ma is a mark that serves as a guide when an operator who assembles the cooling device 5 attaches the cushion member 7 to the cooling fan 51, and is formed so as to be a concave portion or a convex portion with respect to the surrounding surface. As shown in FIG. 4 (b), the recognition mark Ma is connected to the straight line portion that is separated from the edge of the second outer surface 521B, and the straight line portion, and each protrusion group (first protrusion group 5211a, second protrusion). The group 5211b) has a straight line portion that follows the two protruding portions 5211 located on the outside.

The holding member 6 is made of synthetic resin and has a function of holding the cooling fan 51 and a function of guiding the cooling air discharged from the cooling fan 51 to the light source casing 314.
As shown in FIG. 3, the holding member 6 includes a first case 61 and a second case 62, and is configured to accommodate the cooling fan 51 therein.
The first case 61 is formed in a box shape having an opening on one side, and has a bottom surface portion 611 having a first inner surface facing the first outer surface 521A of the cooling fan 51, and an upright standing from the bottom surface portion 611. Part 612.

  An opening 611 a is formed in the bottom surface portion 611 at a position corresponding to the air inlet 521 i of the cooling fan 51. As shown in FIG. 3B, the standing part 612 is provided with a notch part 612 a in which the discharge port forming part 522 of the cooling fan 51 is arranged and a plurality of projecting parts 612 c having screw holes 612 b. . As will be described in detail later, the cushion member 8 is attached to the outer peripheral edge of the discharge port forming portion 522. The notch 612a is a part where the discharge port forming part 522 to which the cushion member 8 is affixed is disposed, and has a function of locking the cooling fan 51 in the rotation direction around the central axis 51S. Corresponds to the stop.

The second case 62 is formed so as to be fitted to the first case 61, and has a bottom surface portion 621 having a second inner surface facing the second outer surface 521 </ b> B of the cooling fan 51, and an upright portion 622 along the upright portion 612. doing.
An opening 621 a is formed in the bottom surface portion 621 at a position corresponding to the air inlet 521 i of the cooling fan 51. As shown in FIG. 3A, the standing portion 622 is provided with a notch portion 622a in which the discharge port forming portion 522 of the cooling fan 51 is disposed and a plurality of insertion holes 622b through which screws are inserted. . The plurality of insertion holes 622b are formed at positions corresponding to the plurality of screw holes 612b of the protrusion 612c.

Further, the second case 62 is provided with a bottom surface portion 621 in the vicinity of the notch portion 622a and a guide portion 622c connected to the upright portion 622. The inner surfaces of the standing portions 612 and 622 correspond to the third inner surface of the cooling fan 51 that faces the third outer surface 521C.
As shown in FIG. 2A, the guide portion 622c has an opening 622d on the first case 61 side in the direction along the central axis 51S when the first case 61 and the second case 62 are combined. It is formed to have. That is, the cooling air discharged from the cooling fan 51 is guided by the guide portion 622c, and the direction is changed from the rotational tangent direction of the central axis 51S to the direction along the central axis 51S.

The cushion members 7 and 8 are formed in a sheet shape with, for example, silicon or urethane foam material or rubber material, and an adhesive material is provided on one surface. The cushion members 7 and 8 of this embodiment have a characteristic that the compressive residual strain measured according to JIS-K6401 is about 5%. Moreover, the cushion members 7 and 8 have a thickness of about 1 mm and are formed in an elongated shape having a rectangular shape in plan view.
As shown in FIG. 3, the cushion member 7 is affixed to the first protrusion group 5211 a and the second protrusion group 5211 b, and the cushion member 8 is affixed to the outer peripheral edge of the discharge port forming portion 522. The cushion member 7 attached to the first protrusion group 5211a is referred to as 71, and the cushion member 7 attached to the second protrusion group 5211b is referred to as 72.

The cushion member 71 has a width that is smaller than the width of the first protrusion group 5211a (the width in the direction in which the three protrusions 5211 are arranged side by side) and is longer than the length of the protrusion 5211.
Since the cushion member 71 has a width smaller than that of the first protrusion group 5211a and the recognition mark Ma is provided on the second outer surface 521B, an operator who assembles the cooling device 5 can perform the first protrusion. Of the three protrusions 5211 of the group 5211a, the cushion member 71 is formed on the protrusion 5211, a part of the first outer surface 521A, and a part of the second outer surface 521B, with reference to the protrusion 5211 located outside and the recognition mark Ma. Can be affixed.

  The cushion member 72 is formed in the same manner as the cushion member 71, and is affixed to the second protruding group 5211b, a part of the first outer surface 521A, and a part of the second outer surface 521B, similarly to the cushion member 71.

The cooling fan 51 is incorporated in the first case 61 with the cushion members 7 and 8 attached thereto, and the second case 62 is screwed to the first case 61 so that the cooling fan 51 is held by the holding member 6.
Specifically, a method for assembling the cooling device will be described with reference to FIG.
FIG. 5 is a cross-sectional view of the cooling device 5.
As shown in FIG. 5, in the cooling fan 51 to which the cushion members 7 and 8 are attached, the discharge port forming portion 522 is locked to the notch portion 612 a via the cushion member 8, and the cushion member 7 is connected to the cooling fan 51. The first case 61 is positioned and arranged by the reaction force of the cushion member 7 that is sandwiched between the first case 61 and the first case 61.

  More specifically, part of the cushion members 71 and 72 is sandwiched between the protruding portion 5211 and the inner surface (third inner surface) of the upright portion 612. Although illustration is omitted, a portion of the cushion members 71 and 72 attached to the first outer surface 521A is sandwiched between the first outer surface 521A and the first inner surface of the first case 61. And the site | part affixed on the 2nd outer surface 521B among the cushion members 71 and 72 is clamped between the 2nd outer surface 521B and the 2nd inner surface in the 2nd case 62. As shown in FIG.

Then, with the cooling fan 51 positioned in the first case 61, the notch 622a of the second case 62 is engaged with the discharge port forming part 522 via the cushion member 8, and is inserted into the insertion hole 622b. The screw is inserted into the screw hole 612b and fixed to the first case 61.
As described above, the cooling fan 51 is supported at three locations by the cushion members 7 and 8 being sandwiched between the cooling fan 51 and the holding member 6, and is positioned and held with respect to the holding member 6. Is done. The cooling fan 51 is held by the holding member 6 via the cushion members 7 and 8 in the direction of the central axis 51S and the direction intersecting the central axis 51S. That is, the cooling fan 51 is positioned and held by the holding member 6 without directly contacting the holding member 6.
The integrated cooling device 5 is screwed to a lower case (not shown) in the exterior housing 2. And the cooling fan 51 drives the cooling device 5 based on the instruction | indication of a control part, and blows cooling air from the guide part 622c. Cooling air blown from the cooling device 5 is introduced from an opening (not shown) provided in the light source casing 314 to cool the light source 311.

As described above, according to the present embodiment, the following effects can be obtained.
(1) The cooling fan 51 is provided with a protrusion 5211, and a part of the cushion member 7 is sandwiched between the protrusion 5211 and the holding member 6. The cooling fan 51 is held by the holding member 6 via the cushion members 7 and 8. Thus, the cooling fan 51 can be held with a stable force without the cooling fan 51 and the holding member 6 being in direct contact with each other. Therefore, it is possible to provide the cooling device 5 that can suppress the vibration of the holding member 6 due to the driving of the cooling fan 51 and can reduce noise.
Further, since the cooling device 5 blows cooling air to the light source device 31 that is a main heat source in the projector 1, even if the cooling fan 51 is driven so as to increase the wind force of the cooling air to be blown, the cooling device 5. Noise can be suppressed. Therefore, it is possible to provide a projector capable of efficiently cooling the projector 1 and reducing noise.

(2) Three protrusions 5211 are arranged in parallel in each protrusion group 5211G, and the cushion member 7 has a width smaller than the width of the protrusion group 5211G. Thus, an operator who assembles the cooling device 5 can apply the cushion member 7 with reference to the protruding portion 5211 located outside the protruding group 5211G, and the cushion member 7 can be securely attached by the protruding portion 5211 inside the protruding group 5211G. Can be pinched. Therefore, the cushion member 7 can be easily disposed at a predetermined position, and the cooling fan 51 can be reliably held by the holding member 6 via the cushion member 7.
Further, since the cushion member 7 is affixed to the plurality of protruding portions 5211, the stress applied to the cooling fan 51 and the holding member 6 can be dispersed and the cooling fan 51 can be held by the holding member 6. Furthermore, since the contact area between the cushion member 7 and each protrusion group 5211G is reduced, it is possible to provide a cooling device 5 that can reduce vibration transmission from the cooling fan 51 to the holding member 6 and can be quiet.

  (3) The cooling fan 51 is held by the holding member 6 via the cushion members 7 and 8 in the direction of the central axis 51S and the direction intersecting the central axis 51S. As a result, the cooling fan 51 is more stably held on the holding member 6, so that the cooling device 5 can be further silenced.

  (4) On the second outer surface 521B of the cooling fan 51, a recognition mark Ma having a shape that follows the shape of the protrusion 5211 is formed. As a result, an operator who assembles the cooling device 5 can apply the cushion member 7 using the recognition mark Ma as a guideline. Can do.

  (5) The cooling device 5 includes a sirocco fan having a higher cooling air discharge pressure than the axial fan as the cooling fan 51. Accordingly, it is possible to cool the light source device 31 efficiently by intensively blowing cooling air to the light source device 31 to be cooled while reducing the noise.

  (6) The cooling fan 51 has the cushion member 8 attached to the outer peripheral edge of the discharge port forming portion 522, and the first case 61 has a notch 612a as a locking portion. Thereby, the cooling fan 51 can be arranged on the holding member 6 with high accuracy. Therefore, the cushion member 7 is securely sandwiched between the protruding portion formed on the cooling fan 51 and a predetermined position on the inner surface (third inner surface) of the upright portions 612 and 622 of the holding member 6, and the cooling fan 51. The cooling air discharged from can be reliably discharged in a predetermined direction. Therefore, the cooling fan 51 can be reliably held by the holding member 6 and the cooling air can be efficiently blown to the light source device 31.

  (7) Since the holding member 6 has the guide portion 622c, the cooling air is supplied to the light source casing 314 from the vicinity of the discharge port 52e through which the cooling air of the cooling fan 51 is discharged without using other members. Can lead.

(Modification)
In addition, you may change the said embodiment as follows.
In the above-described embodiment, each protruding group 5211G is configured by arranging three protruding portions 5211 side by side, but may be configured by a number other than three.
Moreover, although each protrusion part 5211 of the said embodiment is connected and formed toward the 2nd outer surface 521B side from the 1st outer surface 521A side, you may form so that it may protrude intermittently.

  The recognition mark Ma is formed on the second outer surface 521B, but may be formed on the first outer surface 521A, or may be formed on both the first outer surface 521A and the second outer surface 521B.

  The cooling fan 51 of the above embodiment is a double-sided intake sirocco fan, but is not limited to this, and may be a single-sided intake sirocco fan or an axial fan.

  The projector 1 of the embodiment uses a transmissive liquid crystal panel as a light modulation device, but may use a reflective liquid crystal panel. Further, a micromirror type light modulation device such as a DMD (Digital Micromirror Device) may be used as the light modulation device.

  The light modulation device of the embodiment employs a so-called three-plate method using three light modulation devices corresponding to R light, G light, and B light, but is not limited to this, and adopts a single plate method. Alternatively, the present invention can be applied to a projector including two or four or more light modulation devices.

  The light source device 31 is not limited to the one using the discharge-type light source 311, and may be configured by other types of light sources, solid-state light sources such as light emitting diodes and lasers.

  DESCRIPTION OF SYMBOLS 1 ... Projector, 2 ... Exterior housing, 3 ... Optical unit, 5 ... Cooling device, 6 ... Holding member, 7, 71, 72 ... Cushion member (elastic member), 8 ... Cushion member (auxiliary elastic member), 31 ... Light source device, 36 ... projection lens (projection optical device), 51 ... cooling fan (sirocco fan), 51S ... central axis, 52 ... fan case, 52e ... discharge port, 521i ... air intake port, 311 ... light source, 351, 351B, 351G, 351R: Light modulation device, 521: Case main body, 521A: First outer surface, 521B ... Second outer surface, 521C ... Third outer surface, 522 ... Discharge port forming portion, 611, 621 ... Bottom surface portion, 612, 622 ... Standing part, 612a, 622a ... Notch part (locking part), 622c ... Guide part, 5211 ... Projection part, 5211G ... Projection group, 5211a ... First projection group, 5211b ... 2 of the projection group, Ma ... recognition mark.

Claims (8)

A cooling fan that blows cooling air;
A holding member for holding the cooling fan;
A protrusion provided on at least one of the cooling fan and the holding member and protruding from the one toward the other;
An elastic member partly sandwiched between the protrusion and the other;
With
The cooling fan is held by the holding member via the elastic member,
The elastic member is affixed to the protruding portion,
The protrusion has a protrusion group in which at least three protrusions are juxtaposed,
The said elastic member has a width | variety smaller than the width | variety of the said protrusion group in the direction in which the said protrusion part was arranged in parallel, and is stuck to the said protrusion part, The cooling device characterized by the above-mentioned. The cooling device according to claim 1,
The cooling fan has a first outer surface and a second outer surface along a surface intersecting a central axis of a rotating blade, and a third outer surface connected to the first outer surface and the second outer surface,
The holding member has a first inner surface, a second inner surface, and a third inner surface that face the first outer surface, the second outer surface, and the third outer surface, respectively.
The protrusion is provided on one of the third outer surface and the third inner surface,
The elastic member is between the third outer surface and the other of the third inner surface and the protrusion, between the first outer surface and the first inner surface, and between the second outer surface and the second inner surface. The cooling device characterized by being clamped by each. The cooling device according to claim 2,
The protrusion is provided on the third outer surface;
A cooling device, wherein a recognition mark having a shape following the shape of the protruding portion is formed on at least one of the first outer surface and the second outer surface. It is a cooling device as described in any one of Claims 1-3, Comprising:
The cooling device according to claim 1, wherein the cooling fan is a sirocco fan that discharges cooling air taken in from a central axis direction of the blades in a rotational tangential direction. The cooling device according to claim 4,
The cooling fan covers a region where the blades rotate and has a case main body portion formed with an intake port for receiving cooling air, and a discharge port provided with a discharge port protruding from the case main body portion and discharging the cooling air. Having an exit forming section,
An auxiliary elastic member attached to the outer peripheral edge of the discharge port forming portion;
The cooling device according to claim 1, wherein the holding member has a locking portion that locks the discharge port forming portion to which the auxiliary elastic member is attached. It is a cooling device as described in any one of Claims 1-5, Comprising:
The cooling device according to claim 1, wherein the holding member has a guide portion that guides air discharged from the cooling fan. A light source;
A light modulation device for modulating light emitted from the light source;
A projection optical device for projecting light modulated by the light modulation device;
The cooling device according to any one of claims 1 to 6,
A projector comprising: The projector according to claim 7, wherein
The cooling device blows cooling air to the light source.

Images