JP5103918B2 - projector - Google Patents

Description

  The present invention relates to a projector.

2. Description of the Related Art Conventionally, there is known a projector including a light source device, a light modulation device that modulates a light beam emitted from the light source device according to image information, and a projection optical device that enlarges and projects the light beam modulated by the light modulation device. ing.
Such a projector generally has a configuration in which a plurality of circuit elements are mounted on a printed wiring board, and a power supply device that supplies power to each component (light source device, control board, etc.) inside the projector. I have. Also, in order to effectively cool the printed wiring board and circuit elements, the power supply device often employs a structure in which the printed circuit board and the plurality of circuit elements are covered with a cylindrical member and air is blown into the cylindrical member. (See, for example, Patent Document 1).
In general, when a printed wiring board on which a plurality of circuit elements are mounted is installed on a cylindrical member, a structure in which the printed wiring board and the cylindrical member are fixed with screws is often employed.

JP 2003-215700 A

However, when a conventional fixing structure using screws is employed, when assembling the power supply device or disassembling the power supply device, work for attaching or removing the screws occurs, which is troublesome for the operator. Will be carried out.
For this reason, there is a demand for a technique that allows easy assembly and disassembly of the power supply device.

  An object of the present invention is to provide a projector that can easily assemble and disassemble a power supply device.

The projector of the present invention includes a light source device, a light modulation device that modulates a light beam emitted from the light source device according to image information, a projection optical device that enlarges and projects the light beam modulated by the light modulation device, A power supply device that supplies power to each component, wherein the power supply device includes a plurality of circuit elements, and an electronic circuit module having a printed wiring board on which the plurality of circuit elements are mounted, A power supply housing that houses and arranges the electronic circuit module, wherein the power supply housing is erected so as to face each other from the plate surface of the base and the plate surface of the base, and one surface of the printed wiring board a pair of side wall portions but which the electronic circuit module in a space enabling housing arrangement surrounded by said base and in a state facing the plate surface of the base, a predetermined circuit element near one of the plurality of circuit elements A thermistor fixing part capable of fixing a thermistor for detecting the temperature of the air passing therethrough, the thermistor fixing part projecting from the plate surface of the base part to face each other and circulate in the vicinity of the predetermined circuit element A pair of upright pieces extending along the direction of air flow, and a pair of connecting portions for connecting the respective tip portions of the pair of upright pieces, the pair of upright pieces from the plate surface of the base portion The height dimension is formed so as to decrease toward the downstream side of the air flowing in the vicinity of the predetermined circuit element, and the thermistor is fitted between the pair of connecting portions, and the vicinity of the predetermined circuit element is It is characterized by detecting the temperature of air that is circulated and taken into a cylindrical space surrounded by the base, the pair of upstanding pieces, the pair of connecting portions, and the thermistor .

Here, as the electronic circuit module, a plurality of circuit elements may be mounted on one printed wiring board to constitute the functions of the light source driving circuit board and the power supply circuit board as a single unit, or two printed wiring boards. A plurality of circuit elements may be mounted on the light source driving circuit board and the power circuit board, respectively.
By the way, when detecting the temperature of a predetermined circuit element constituting the electronic circuit module (the temperature of air circulating in the vicinity of the circuit element) and performing a predetermined control according to the detected temperature, It is conceivable to mount a thermistor in the vicinity of the predetermined circuit element. However, it is difficult to mount a plurality of circuit elements and thermistors on the printed wiring board in consideration of the air circulation state around the electronic circuit module, and the degree of freedom in designing the electronic circuit module is reduced.
In the present invention, the power supply housing includes a thermistor fixing portion for fixing the thermistor. This eliminates the need to mount a thermistor on the printed wiring board, and does not reduce the degree of freedom in designing the electronic circuit module.
Further, the thermistor is installed in an inclined state with respect to the flow direction of air flowing in the vicinity of a predetermined circuit element to be detected. For this reason, for example, in a configuration in which the thermistor is fixed substantially parallel to the air flow direction, it is difficult to detect the temperature of the air with the thermistor, and the thermistor is tilted with respect to the air flow direction. Thus, it is possible to satisfactorily detect the air temperature with the thermistor.
In the projector according to the aspect of the invention, the power supply housing may include a support receiving portion that is erected from a plate surface of the base portion and that contacts the one surface of the printed wiring board to support the electronic circuit module. One of the side wall portions is formed with a pair of protrusions that protrude from an end surface facing the other side wall portion and that can be fitted to a side end portion of the printed wiring board. A claw portion that protrudes in a direction substantially orthogonal to the plate surface of the base portion and a tip portion in the protruding direction bends toward the one side wall portion is formed on the other side wall portion of the side wall portions, and the claw portion Is configured such that the proximal end portion is flexible and the distal end portion is close to and separable from the one side wall portion, and the electronic circuit module is accommodated in the power supply housing. Abuts against the other surface of the printed wiring board. It is preferred to regulate the movement in a direction away from the space of the side edge opposite the side edge portion which is fitted to the pair of projections in the printed circuit board.
According to the present invention, in the power supply device constituting the projector, the power supply housing that houses and arranges the electronic circuit module includes a base portion, a pair of side wall portions, and a support receiving portion. And a pair of projection part and a nail | claw part are formed in a pair of side wall part. Thereby, the operator can assemble a power supply device as shown below, for example.
First, the operator inserts the electronic circuit module into a space surrounded by the base and the pair of side wall portions, and fits the side end portions of the printed wiring board constituting the electronic circuit module to the pair of protrusions.
Next, the operator bends the base end portion of the claw portion and moves the tip portion of the claw portion in a direction away from the printed wiring board, and abuts one surface of the printed wiring board against the support receiving portion. And an operator returns the nail | claw part to the initial state (The state which the base end part bent is returned to the original state), and the side which opposes the side edge part fitted by the pair of projection part in a printed wiring board The movement of the end portion in the direction away from the space is restricted by the claw portion. That is, the electronic circuit module is fixed to the power supply housing by the pair of protrusions, the claw portions, and the support receiving portion.
When disassembling the power supply device, the reverse operation is performed.

  As described above, according to the present invention, by forming the pair of protrusions, the claw portion, and the support receiving portion on the power supply housing, the power supply housing can be used without using a fixing member such as a screw as in the prior art. The electronic circuit module can be fixed to the housing, and the power supply device can be easily assembled and disassembled with a simple configuration.

In the projector according to the aspect of the invention, the claw portion may come into contact with the printed wiring board when the electronic circuit module is stored in the space, and the one of the claw portions is gradually set toward the storage direction of the electronic circuit module in the space. It is preferable that an inclined surface inclined so as to be close to the side wall portion is formed.
In the present invention, the claw portion is formed with an inclined surface that is inclined so as to gradually approach one side wall portion as it goes in the storage direction of the electronic circuit module. As a result, the operator can assemble the power supply device as shown below.
That is, the operator, after fitting the side end portions of the printed wiring board constituting the electronic circuit module to the pair of protrusions, the side facing the side end portions fitted to the pair of protrusions on the printed wiring board The end side is brought into contact with the inclined surface of the claw portion. And an operator presses the side edge part side which opposes the side edge part fitted by a pair of projection part in a printed wiring board in a storage direction. Here, since the inclined surface of the claw portion is inclined as described above, the distal end portion moves in the direction away from the printed wiring board while the proximal end portion is bent by being pressed by the printed wiring board. Further, the claw portion returns to the initial state again when the contact state between the inclined surface and the printed wiring board is released as a result of the tip portion moving in a direction away from the printed wiring board.
As described above, by forming an inclined surface on the nail part, the operator can move the tip part of the nail part without touching the nail part simply by pressing the printed circuit board, and attach it to the power supply housing. On the other hand, an electronic circuit module can be installed. For this reason, the work efficiency which assembles a power supply device can be improved more.

  In the projector according to the aspect of the invention, the electronic circuit module includes two units, a light source driving circuit board that drives the light source device, and a power circuit board that supplies power to each component including the light source driving circuit board. The pair of side wall portions, corresponding to the electronic circuit module, are erected from one plate surface of the base portion, and a pair of light source drive circuit side wall portions capable of accommodating and arranging the light source drive circuit board, and the base portion A pair of power supply circuit side walls that are erected from the other plate surface of the power supply circuit board so that the power supply circuit board can be housed and disposed, and the support receiving portion corresponds to the electronic circuit module and corresponds to one of the base portions. A light source drive circuit support receiving portion that stands from a plate surface and supports the light source drive circuit substrate; and a power supply circuit support reception portion that stands from the other plate surface of the base and supports the power supply circuit substrate. Have Masui.

  In the present invention, the electronic circuit module is composed of two bodies, a light source driving circuit board and a power supply circuit board, and a pair of side wall portions and support receiving portions are also provided corresponding to the electronic circuit module. A pair of side wall portions (a pair of light source drive circuit side wall portions, a pair of power supply circuit side wall portions) and a support receiving portion (light source drive circuit support receiving portion, power supply circuit support receiving portion) are provided on each base plate. Each surface is formed. As a result, the light source drive circuit board and the power supply circuit board are installed in the power supply casing in a state where they are stacked with the base portion interposed therebetween. For this reason, it is not necessary to provide two power supply cases corresponding to the light source drive circuit board and the power supply circuit board, and the light source drive circuit board and the power supply circuit board can be accommodated in the single power supply case. Further, since the light source drive circuit board and the power supply circuit board can be housed and disposed in a single power supply housing, the power supply apparatus can be reduced in size.

In the projector according to the aspect of the invention, the power supply casing can fix the cooling fan so as to straddle the side end portion of the base portion, and the air discharged from the cooling fan can be supplied to one plate surface side of the base portion and the other side. It is preferable to provide an air introduction part for introduction to the plate surface side.
According to the present invention, since the power supply housing includes the air introduction portion that can fix the cooling fan so as to straddle the side end portion of the base portion, the air discharged from the cooling fan is supplied to one plate of the base portion. Air can be blown to both the light source drive circuit board disposed on the surface side and the power supply circuit board disposed on the other plate surface side of the base, and the electronic circuit module can be efficiently cooled.

Hereinafter, an embodiment of the present invention will be described with reference to the drawings.
[Schematic configuration of projector]
FIG. 1 is a diagram schematically showing a schematic configuration of the projector 1.
In FIG. 1, for convenience of explanation, the projection direction of the light beam from the projector 1 is a Z axis, and two axes orthogonal to the Z axis are an X axis (horizontal axis) and a Y axis (vertical axis), respectively. The same applies to the following drawings.
The projector 1 modulates a light beam emitted from a light source according to image information to form a color image (image light), and enlarges and projects this color image on a screen (not shown). As shown in FIG. 1, the projector 1 includes a substantially rectangular parallelepiped outer casing 2, a projection lens 3 as a projection optical device, an optical unit 4, a power supply device 5, and the like.
Although not shown in FIG. 1, the components inside the projector 1 are cooled in a space other than the projection lens 3, the optical unit 4, and the power supply device 5 in the exterior housing 2. It is assumed that a cooling unit including a cooling fan and the like, a control device that controls each component in the projector 1, and the like are arranged.

The exterior housing 2 is a synthetic resin product by injection molding or the like, and configures the upper case, the front surface, the back surface, and the side surface of the projector 1, and the bottom surface, the front surface, the back surface, and the side surface of the projector 1, respectively. It consists of a lower case. Each case is fixed to each other with a screw or the like.
The exterior casing 2 is not limited to being made of synthetic resin, but may be formed of other materials, for example, metal.
The projection lens 3 is configured as a combined lens in which a plurality of lenses are combined, and enlarges and projects a color image formed by the optical unit 4 on a screen (not shown).

  As shown in FIG. 1, the optical unit 4 extends along the back surface of the exterior housing 2 and has a substantially L-shape in plan view extending along the side surface of the exterior housing 2. This unit is a unit that optically processes a light beam emitted from a light source under control to form a color image corresponding to image information. As shown in FIG. 1, the optical unit 4 includes a light source device 41, a uniform illumination optical device 42, a color separation optical device 43, a relay optical device 44, an optical device 45, and an optical component casing 46. Is provided.

The light source device 41 is turned on under the control of the control device, and emits a light beam toward the uniform illumination optical device 42. As shown in FIG. 1, the light source device 41 includes a light source device main body 41A having a light source lamp 411 and a reflector 412, a collimating lens 413, and a lamp housing 414 that houses these members 411 to 413 therein. . These members 411 to 413 are housed and arranged in a lamp housing 414 connected to the optical component casing 46, so that a predetermined position with respect to the optical component casing 46 (the central axis of the light beam emitted from the light source device 41) (Position where the illumination optical axis A set in the optical component casing 46 coincides). The radial light beam emitted from the light source lamp 411 is reflected by the reflector 412 and converted into parallel light through the parallelizing lens 413.
In FIG. 1, the reflector 412 is configured as an ellipsoidal reflector. However, the present invention is not limited thereto, and the reflector 412 may be configured as a parabolic reflector that reflects the light beam emitted from the light source lamp 411 as substantially parallel light. In this case, the collimating lens 413 is omitted.

The uniform illumination optical device 42 is an optical system for illuminating a light beam emitted from the light source device 41 substantially uniformly on an image forming area of a liquid crystal panel, which will be described later, constituting the optical device 45. As shown in FIG. 1, the uniform illumination optical device 42 includes a first lens array 421, a second lens array 422, a polarization conversion element 423, and a superimposing lens 424.
The first lens array 421 has a configuration in which first small lenses having a substantially rectangular outline when viewed from the incident optical axis direction are arranged in a matrix in a plane substantially orthogonal to the incident optical axis. . Each first small lens splits the light beam emitted from the light source device 41 into a plurality of partial light beams.
The second lens array 422 has substantially the same configuration as the first lens array 421, and has a configuration in which the second small lenses are arranged in a matrix. The second lens array 422 has a function of forming an image of each first small lens of the first lens array 421 on a liquid crystal panel (to be described later) of the optical device 45 together with the superimposing lens 424.

The polarization conversion element 423 is disposed between the second lens array 422 and the superimposing lens 424, and converts light from the second lens array 422 into substantially one type of polarized light.
Specifically, each partial light converted into approximately one type of polarized light by the polarization conversion element 423 is finally superimposed on a liquid crystal panel (described later) of the optical device 45 by the superimposing lens 424. In a projector using a liquid crystal panel of a type that modulates polarized light, only one type of polarized light can be used, and therefore approximately half of the light from the light source device 41 that emits randomly polarized light cannot be used. For this reason, by using the polarization conversion element 423, the light emitted from the light source device 41 is converted into substantially one type of polarized light, and the light use efficiency in the optical device 45 is increased.

As shown in FIG. 1, the color separation optical device 43 includes two dichroic mirrors 431 and 432 and a reflection mirror 433, and a plurality of partial light beams emitted from the uniform illumination optical device 42 by the dichroic mirrors 431 and 432. Has a function of separating the light into three color lights of red, green, and blue.
As shown in FIG. 1, the relay optical device 44 includes an incident side lens 441, a relay lens 443, and reflection mirrors 442 and 444, and the red light separated by the color separation optical device 43 is converted into red to be described later of the optical device 45. It has the function of leading to the liquid crystal panel for light.

At this time, the dichroic mirror 431 of the color separation optical device 43 reflects the blue light component of the light beam emitted from the uniform illumination optical device 42 and transmits the red light component and the green light component. The blue light reflected by the dichroic mirror 431 is reflected by the reflection mirror 433, passes through the field lens 425, and reaches a later-described blue light liquid crystal panel of the optical device 45.
The field lens 425 converts each partial light beam emitted from the second lens array 422 into a light beam parallel to the central axis (principal ray). The same applies to the field lens 425 provided on the light beam incident side of the other liquid crystal panel for green light and red light.

Of the red light and green light transmitted through the dichroic mirror 431, the green light is reflected by the dichroic mirror 432, passes through the field lens 425, and reaches a later-described green light liquid crystal panel of the optical device 45. On the other hand, the red light passes through the dichroic mirror 432, passes through the relay optical device 44, passes through the field lens 425, and reaches a later-described red light liquid crystal panel of the optical device 45.
The reason why the relay optical device 44 is used for red light is that the length of the optical path of red light is longer than the length of the optical path of other color light, thereby preventing a decrease in light use efficiency due to light divergence or the like. It is to do. That is, this is to transmit the partial light beam incident on the incident side lens 441 to the field lens 425 as it is.

  The optical device 45 modulates an incident light beam according to image information to form image light (color image). As shown in FIG. 1, the optical device 45 includes three liquid crystal panels 451 (red light liquid crystal panel 451R, green light liquid crystal panel 451G, and blue light liquid crystal panel as light modulation devices. 451B), an incident-side polarizing plate 452 and an emitting-side polarizing plate 453 arranged on the light-incident side and light-emitting side of each liquid crystal panel 451, and a cross dichroic prism 454 as a color synthesizing optical device.

The incident-side polarizing plate 452 transmits only polarized light having a polarization direction substantially the same as the polarization direction aligned by the polarization conversion element 423 out of each color light separated by the color separation optical device 43 and transmits other light beams. Although it absorbs and a specific illustration is omitted, a polarizing film is pasted on a translucent substrate.
Although not specifically illustrated, the liquid crystal panel 451 has a configuration in which a liquid crystal as an electro-optical material is hermetically sealed between a pair of transparent glass substrates, and the liquid crystal panel 451 is configured to respond to a drive signal from the control device. Is controlled, and the polarization direction of the polarized light beam emitted from the incident-side polarizing plate 452 is modulated.

The exit-side polarizing plate 453 has the same configuration as that of the incident-side polarizing plate 452, and only the light beam having a polarization direction orthogonal to the transmission axis of the light beam in the incident-side polarizing plate 452 among the light beams emitted from the liquid crystal panel 451. It transmits light and absorbs other light fluxes.
The cross dichroic prism 454 is an optical element that forms image light (color image) by synthesizing modulated light modulated for each color light emitted from the emission-side polarizing plate 453. The cross dichroic prism 454 has a square shape in plan view in which four right-angle prisms are bonded together, and two dielectric multilayer films are formed at the interface where the right-angle prisms are bonded together. These dielectric multilayer films transmit the color light emitted from the liquid crystal panel 451G and pass through the emission-side polarizing plate 453, and reflect the color light emitted from the liquid crystal panels 451R and 451B and passed through the emission-side polarizing plate 453. In this way, the color lights are combined to form a color image. The color image formed by the cross dichroic prism 454 is enlarged and projected onto a screen or the like by the projection lens 3 described above.

  The optical component casing 46 is a housing in which a predetermined illumination optical axis A (FIG. 1) is set, and the optical components 42 to 45 described above are accommodated and disposed at predetermined positions with respect to the illumination optical axis A.

[Configuration of power supply unit]
2 to 6 are diagrams showing the configuration of the power supply device 5. Specifically, FIG. 2 is a view of the power supply device 5 as viewed from the upper rear side. FIG. 3 is a view of the power supply device 5 as viewed from the upper front side. FIG. 4 is a view of the power supply device 5 as viewed from the lower rear side. FIG. 5 is a view of the power supply device 5 as seen from the front lower side. FIG. 6 is a diagram of the power supply device 5 as viewed from the −X axis direction side.
As shown in FIG. 1, the power supply device 5 is disposed in an L-shaped inner portion of the optical unit 4 and supplies power to each component constituting the projector 1. As shown in FIGS. 2 to 6, the power supply device 5 includes an electronic circuit module 5 </ b> A composed of two bodies of a power circuit board 51 and a light source drive circuit board 52 (FIGS. 2, 3, and 6) Housing 53, cooling fan 54 (FIGS. 2, 4, and 5), and thermistor 55 (FIGS. 2, 3, and 6).

  The power supply circuit board 51 receives AC power from a commercial power supply via a power cable (not shown) from the outside, and rectifies and smoothes the AC power to be necessary for each component (light source drive circuit board 52, the control device, etc.). It is converted into DC power of various voltage values and output. As shown in FIG. 4 or FIG. 6, the power supply circuit board 51 has a rectangular shape in plan view on which a plurality of circuit elements 511 such as a transformer, a semiconductor element, a choke coil, and a capacitor are mounted, and a plurality of circuit elements 511 are mounted. And a printed wiring board 512.

The light source drive circuit board 52 drives and drives the light source lamp 411 based on the DC power from the power supply circuit board 51. The light source drive circuit board 52 converts a DC voltage input from the power supply circuit board 51 to an appropriate DC voltage, a down chopper (chopper circuit), and converts a DC current supplied from the down chopper into an AC current having a predetermined frequency. Inverter (full bridge circuit) supplied to the light source lamp 411 and an igniter (boost circuit) for applying a high voltage pulse voltage when the light source lamp 411 is started. The light source driving circuit board 52 includes a plurality of circuit elements 521 including an igniter transformer 521A and a plurality of circuit elements 521, as shown in FIG. 2, FIG. 3, or FIG. And a printed wiring board 522 having a rectangular shape in plan view.
The printed wiring board 522 constituting the light source driving circuit board 52 is formed to have a planar shape smaller than the planar shape of the printed wiring board 512 constituting the power supply circuit board 51 as shown in FIG. .

  The power supply casing 53 is a molded product formed of an insulating material by injection molding or the like, and supports the power supply circuit board 51 and the light source drive circuit board 52 and integrates the boards 51 and 52. Examples of the insulating material constituting the power supply casing 53 include ABS (acrylonitrile-butadiene-styrene copolymer), PC (polycarbonate), PBT (polybutylene terephthalate), PPE (polyphenylene ether) + PS ( Polystyrene) or the like, or a material obtained by adding glass fibers to each of these resins. The thickness of the power supply casing 53 is preferably set in the range of 0.3 mm to 2.0 mm.

As shown in FIGS. 2 to 6, the power supply casing 53 includes a base portion 531, a first support portion 532, a second support portion 533, an air introduction portion 534, and a thermistor fixing portion 535. Prepare.
As shown in FIGS. 2 to 6, the base portion 531 is formed in a rectangular plate shape in plan view extending along the XZ plane. As shown in FIGS. 2 to 6, the base portion 531 has a planar shape larger than the planar shapes of the printed wiring boards 512 and 522 of the substrates 51 and 52.

  As shown in FIG. 2 or 3, the first support portion 532 is provided on the + Y axis direction side of the base portion 531, and supports and fixes the light source drive circuit board 52. More specifically, as shown in FIG. 2 or 3, the first support portion 532 includes a plurality of circuit elements 521 mounted on the printed wiring board 522 positioned in the + Y-axis direction, and the length of the printed wiring board 522 is long. The light source drive circuit board 52 is supported and fixed so that the direction is in the X-axis direction and the short direction is in the Z-axis direction. As shown in FIGS. 2 to 5, the first support portion 532 includes a support portion main body 532A and a lid-like portion 532B.

As shown in FIG. 2 or 3, the support portion main body 532 </ b> A is a portion that stands on the end surface in the + Y-axis direction of the base portion 531 and supports and fixes the light source drive circuit board 52. As shown in FIG. 2, FIG. 3, or FIG. 6, the support portion main body 532 </ b> A includes a first side wall portion 5321, a second side wall portion 5322, a third side wall portion 5323, and a support receiving portion 5324 ( 2 and 6). The second side wall 5322 and the third side wall 5323 correspond to a pair of light source driving circuit side walls according to the present invention. The support receiving portion 5324 corresponds to the light source driving circuit support receiving portion according to the present invention.
As shown in FIG. 2 or 3, the first side wall portion 5321 is formed in a rectangular plate shape in plan view that protrudes in the + Y-axis direction substantially parallel to the YZ plane from the + X-axis direction edge of the base portion 531. . The first side wall portion 5321 has a length dimension in the Z-axis direction set to be substantially the same as a length dimension in the short-side direction of the printed wiring board 522 constituting the light source driving circuit board 52, and the length in the Y-axis direction. The length dimension is set to be larger than the length dimension of the entire light source drive circuit board 52 in the Y-axis direction.

  As shown in FIG. 2 or FIG. 3, the second side wall portion 5322 is formed in a rectangular plate shape in plan view that protrudes in the + Y-axis direction substantially parallel to the XY plane from the −Z-axis direction edge of the base portion 531. Yes. In addition, the second side wall portion 5322 has a + X-axis direction edge connected to a −Z-axis direction edge of the first side wall portion 5321. The second side wall portion 5322 is set to have a length dimension in the X-axis direction substantially the same as a length dimension in the longitudinal direction of the printed wiring board 522 constituting the light source driving circuit board 52, and the length in the Y-axis direction. The dimension is set to be approximately the same as the length dimension of the first side wall portion 5321 in the Y-axis direction.

  In the second side wall portion 5322, on the base end side (near the −Y-axis direction end edge) of the + Z-axis direction end face, as shown in FIG. 3 or FIG. 6, a predetermined interval is provided in the Y-axis direction. A pair of protrusions 5322A protruding in the + Z-axis direction is formed. More specifically, the pair of protrusions 5322A are arranged in parallel in the Y-axis direction with an interval corresponding to a dimension substantially the same as the thickness dimension of the printed wiring board 522. Then, the −Z-axis direction end of the printed wiring board 522 can be fitted into the pair of protrusions 5322A in a loosely fitted state.

As shown in FIG. 2 or FIG. 3, the third side wall portion 5323 has a rectangular plate shape in plan view (when viewed from the Z-axis direction), and the + X-axis direction end edge of the first side wall portion 5321 It is erected on the + Y-axis direction end face of the base portion 531 so as to connect to the + Z-axis direction edge and to face the second side wall portion 5322. Further, the third side wall portion 5323 is formed to have substantially the same planar shape as that of the second side wall portion 5322 (planar shape viewed from the Z-axis direction).
That is, each of the side wall portions 5321 to 5323 has three side edges (+ X-axis direction edge, Z-axis direction edge) of the light source driving circuit board 52 in a state where the light source driving circuit board 52 is disposed with respect to the power supply casing 53. It is formed so as to surround the both end edges in the direction.

In the third side wall portion 5323, on the −Y axis direction side, as shown in FIG. 2 or FIG. 3, an opening having a rectangular shape in a plan view (when viewed from the Z axis direction) on both end sides in the X axis direction. Portions 5323A are respectively formed.
Further, as shown in FIG. 2 or FIG. 3, claw portions 5323B are formed at the edge portions in the + Y-axis direction of these openings 5323A.
As shown in FIG. 2, these claw portions 5323 </ b> B include a protruding portion 5323 </ b> C that protrudes in the −Y-axis direction substantially parallel to the XY plane from the + Y-axis direction edge portion of the opening 5323 </ b> A, and a protruding-direction tip portion of the protruding portion 5323 </ b> C. And a bent portion 5323D that protrudes in the −Z-axis direction substantially parallel to the XZ plane is integrally formed, and is configured in a plate shape having an L shape in plan view (when viewed from the X-axis direction). These claw portions 5323B have the base end portion of the protruding portion 5323C having flexibility due to the rigidity of the material of the power supply casing 53 and the shape described above, and the bent portion 5323D is bent by the bending of the protruding portion 5323C. It can move in the Z-axis direction.

In these claw portions 5323B, as shown in FIG. 2, a pressure receiving portion 5323E is formed on the end portion of the bent portion 5323D on the + Y-axis direction end surface in the L-shaped inner portion of the protruding portion 5323C and the bent portion 5323D.
The press receiving portion 5323E abuts on the printed wiring board 522 of the light source driving circuit board 52 and is pressed from the printed wiring board 522 when the light source driving circuit board 52 is disposed with respect to the power supply casing 53. Part. As shown in FIG. 2, the pressure receiving portion 5323E protrudes in the −Z-axis direction along the bent portion 5323D from the −Z-axis direction end surface of the protruding portion 5323C and extends in parallel with the XY plane. Is formed. Further, as shown in FIG. 2 or FIG. 6, the pressing receiving portion 5323E gradually increases in size in the protruding direction (dimension in the Z-axis direction) toward the −Y axis direction, and has an inclined surface at the tip end in the protruding direction. 5323E1 is included.

As shown in FIG. 2, the support receiving portion 5324 is provided in the vicinity of each claw portion 5323 </ b> B formed on the third side wall portion 5323 in a region surrounded by the side wall portions 5321 to 5323 on the end surface of the base portion 531 in the + Y-axis direction. Each is erected. These support receiving portions 5324 are portions that support the light source drive circuit board 52 from the −Y-axis direction when the light source drive circuit board 52 is disposed with respect to the power supply casing 53.
More specifically, as shown in FIG. 6, these support receiving portions 5324 have a columnar shape with the columnar axis facing the Y-axis direction, the distal end portion 5324A has a smaller diameter than the proximal end portion 5324B, and a step difference. A stepped shape having a portion 5324C is formed. When the light source drive circuit board 52 is disposed in the power supply casing 53, as shown in FIG. 2 or FIG. 6, a pair of circular holes 5221 formed in the printed wiring board 522 (FIG. 2). The tip end portion 5324A of each support receiving portion 5324 is inserted, and the end surface in the −Y-axis direction of the printed wiring board 522 contacts the stepped portion 5324C of each support receiving portion 5324.

As shown in FIG. 2 or 3, the lid-like portion 532 </ b> B is formed in a rectangular plate shape in plan view, and is configured to be detachable at the + Y-axis direction end portions of the side wall portions 5321 to 5323. Then, by attaching the lid-like portion 532B to the + Y-axis direction end portions of the side wall portions 5321 to 5323, the opening portions on the + Y-axis direction side of the side wall portions 5321 to 5323 are closed by the lid-like portion 532B, and the base portion 531 is closed. A space Ar <b> 1 (FIGS. 2, 3, and 6) surrounded by the side wall portions 5321 to 5323 and the lid-like portion 532 </ b> B and having an open side on the −X axis direction side is formed.
In the lid-like portion 532B, a rectifying portion 532B1 protruding in the −Y-axis direction is formed at the corner portion on the + Z-axis direction side and the + X-axis direction side, as shown in FIG.
More specifically, as shown in FIG. 3, the rectifying unit 532B1 is disposed in the space Ar1 in a state in which the lid-like part 532B is attached to the + Y-axis direction ends of the side wall parts 5321 to 5323. As shown in FIG. 3, the rectifying unit 532B1 has a plate shape that is inclined toward the −X axis direction toward the + Z axis direction, and blows air in the + Z axis direction by driving the cooling fan 54. The rectified air is rectified in the −X axis direction.

With the above configuration, the worker installs the light source drive circuit board 52 with respect to the power supply casing 53 (first support portion 532) as described below.
First, the operator moves the −Z-axis direction end portion of the printed wiring board 522 to the + Z direction in a state where the plurality of circuit elements 521 are positioned in the + Y-axis direction and the pair of circular holes 5221 are positioned on the + Z-axis direction side. The light source driving circuit board 52 is inserted into the space Ar1 while being inclined so as to be positioned on the −Y axis direction side with respect to the axial end. Then, the operator aligns the pair of circular holes 5221 in the printed wiring board 522 with each support receiving portion 5324, and sets the −Z-axis direction end portion of the printed wiring board 522 to the pair of protrusions 5322 </ b> A of the second side wall portion 5322. Are fitted in a loosely fitted state. In this state, the printed wiring board 522 is in contact with the inclined surfaces 5323E1 of the pair of claw portions 5323B of the third side wall portion 5323 at the + Z axis direction end portion, and is positioned on the + Y axis direction side of the pair of claw portions 5323B. State.

  Next, the operator presses the + Z-axis direction end portion of the printed wiring board 522 toward the −Y-axis direction side. At this time, the + Z-axis direction end portion of the printed wiring board 522 moves in the −Y-axis direction while being in sliding contact with the inclined surfaces 5323E1 of the pair of claw portions 5323B. That is, the inclined surface 5323E1 is an inclined surface that extends in the −Z-axis direction (the direction close to the second side wall portion 5322) as it goes in the −Y-axis direction (the storage direction of the light source drive circuit board 52 in the space Ar1). Therefore, the pair of claw portions 5323B are pressed by the printed wiring board 522 and the base end portions (protruding portions 5323C) bend as the + Z-axis direction end of the printed wiring board 522 moves in the -Y-axis direction. The distal end portion (bent portion 5323D) gradually moves in the + Z-axis direction.

  When the operator moves the + Z-axis direction end of the printed wiring board 522 further to the −Y-axis direction side, the tip portions (bending portions 5323D) of the pair of claws 5323B further move in the + Z-axis direction, The contact state between the end portion in the + Z-axis direction of the printed wiring board 522 and the inclined surface 5323E1 is released. That is, the pressing state from the printed wiring board 522 to the pair of claw portions 5323B is released. And a pair of nail | claw part 5323B returns to the original bending | deflection of a base end part (protrusion part 5323C), a front-end | tip part (bending part 5323D) moves to a -Z-axis direction, and is set to an initial state.

In this state, the tip end portion 5324A of each support receiving portion 5324 is inserted into the pair of circular holes 5221 of the printed wiring board 522, and the −Y-axis direction end surface of the printed wiring board 522 contacts the stepped portion 5324C of each support receiving portion 5324. Touch. Further, the end surfaces in the −Y-axis direction of the bent portions 5323D of the pair of claw portions 5323B are in contact with the end surfaces in the + Y-axis direction of the printed wiring board 522.
That is, the movement of the light source drive circuit board 52 in the Y-axis direction is restricted by the printed wiring board 522 being sandwiched between the pair of protrusions 5322A and between the step parts 5324C and the bent parts 5323D. Further, the movement of the light source drive circuit board 52 in the XZ plane is restricted by fitting the tip portions 5324A of the support receiving portions 5324 into the pair of circular holes 5221.

  As shown in FIG. 4 or 5, the second support portion 533 is provided on the −Y axis direction side of the base portion 531, and supports and fixes the power supply circuit board 51. More specifically, as shown in FIG. 4 or FIG. 5, the second support portion 533 includes a plurality of circuit elements 511 mounted on the printed wiring board 512 in the + Y-axis direction, and the length of the printed wiring board 512. The power supply circuit board 51 is supported and fixed so that the direction is in the X-axis direction and the short direction is in the Z-axis direction. As shown in FIG. 4 or 5, the second support portion 533 includes a first side wall portion 5331 and a second side wall portion that are substantially the same as the support portion main body 532A of the first support portion 532 described above. 5332, a third side wall portion 5333, and a support receiving portion 5334. Note that the second sidewall portion 5332 and the third sidewall portion 5333 correspond to a pair of power supply circuit sidewall portions according to the present invention. The support receiving portion 5334 corresponds to the power supply circuit support receiving portion according to the present invention.

  As shown in FIG. 4 or FIG. 5, the first side wall portion 5331 is substantially parallel to the YZ plane from the + X-axis direction edge of the base portion 531 so as to be flush with the first side wall portion 5321 described above. -It is formed in a rectangular plate shape in plan view protruding in the Y-axis direction. The first side wall portion 5331 has a length dimension in the Z-axis direction that is set to be substantially the same as a length dimension in the short-side direction of the printed wiring board 512 that constitutes the power supply circuit board 51, and has a length in the Y-axis direction. The dimension is set larger than the length dimension of the entire power circuit board 51 in the Y-axis direction.

  As shown in FIG. 4 or 5, the second side wall portion 5332 is substantially parallel to the XY plane from the −Z axial end edge of the base portion 531 so as to be flush with the second side wall portion 5322 described above. And formed in a rectangular plate shape in plan view protruding in the −Y-axis direction. In addition, the second side wall portion 5322 has a + X-axis direction edge connected to a −Z-axis direction edge of the first side wall portion 5321. The second side wall 5322 has a length dimension in the X-axis direction that is set to be substantially the same as a length dimension in the longitudinal direction of the printed wiring board 512 that constitutes the power supply circuit board 51, and a length dimension in the Y-axis direction. Is set to be substantially the same as the length dimension of the first side wall portion 5331 in the Y-axis direction.

  In the second side wall portion 5332, a pair of ends similar to the above-described pair of protrusions 5322A is formed on the tip end portion (near the −Y-axis direction end edge) of the end surface in the + Z-axis direction, as shown in FIGS. Two sets of protrusions 5332A are formed at predetermined intervals in the X-axis direction. Each pair of protrusions 5332A can be fitted with the −Z-axis direction ends of the printed wiring board 512 in a loosely fitted state.

As shown in FIGS. 2 to 6, the third side wall portion 5333 has a rectangular plate shape in plan view (when viewed from the Z-axis direction), and the + X-axis direction end edge of the first side wall portion 5331. The base portion 531 protrudes in the −Y-axis direction substantially parallel to the XY plane so as to be connected to the + Z-axis direction edge and to face the second side wall portion 5332. The third side wall portion 5333 is formed so as to have substantially the same planar shape as the planar shape (planar shape viewed from the Z-axis direction) of the second side wall portion 5332.
That is, each of the side wall parts 5331 to 5333 has three side edges (+ X-axis direction edge and Z-axis direction both ends) of the power supply circuit board 51 in a state where the power supply circuit board 51 is disposed with respect to the power supply casing 53. Edge).

In the third side wall portion 5333, at the −Y-axis direction edge, as shown in FIG. 4 or FIG. 5, a U-shaped cutout that is cut out toward the + Y-axis direction side at both ends in the X-axis direction. 5333A is formed.
Further, as shown in FIG. 4 or FIG. 5, claw portions 5333B substantially the same as the claw portions 5323B described above are formed at the + Y-axis direction edge portions of these notches 5333A.
More specifically, as shown in FIG. 4 or FIG. 5, these claw portions 5333B include a protruding portion 5333C protruding in the −Y-axis direction substantially parallel to the XY plane from the + Y-axis direction edge portion of the notch 5333A, A bent portion 5333D that protrudes in the −Z-axis direction substantially in parallel to the XZ plane from the protruding portion front end portion of the protruding portion 5333C is integrally formed, and has an L shape in plan view (when viewed from the X-axis direction). It is configured in a plate shape. These claw portions 5333B have the base end portion of the protruding portion 5333C having flexibility due to the rigidity of the material of the power supply casing 53 and the shape described above, and the bent portion 5323D is bent by the bending of the protruding portion 5333C. It can move in the Z-axis direction.

In each bent portion 5333D, the corner portion on the −Y-axis direction side and the −Z-axis direction side is chamfered and has an inclined surface 5333E as shown in FIG. 4 or FIG. ing. More specifically, each inclined surface 5333E is an inclined surface that goes in the −Z-axis direction as it goes in the + Y-axis direction.
Each inclined surface 5333E of each bent portion 5333D abuts on the printed circuit board 512 of the power circuit board 51 when the power circuit board 51 is disposed with respect to the power supply casing 53, and the printed circuit board 512. It is a part pressed from.

Here, as shown in FIG. 5, a rectifying unit 5335 is formed at a connection portion between the first side wall portion 5331 and the third side wall portion 5333.
More specifically, the rectification unit 5335 is surrounded by the base 531, the side wall parts 5331 to 5333, and the power supply circuit board 51 in a state where the power supply circuit board 51 is installed with respect to the power supply casing 531. A cooling fan having a flat rectifying surface (not shown) that faces the space Ar2 (FIGS. 4 to 6) that is open on the direction side and is inclined so as to be directed in the −X axis direction toward the + Z axis direction. By driving 54, air blown in the + Z-axis direction is rectified in the −X-axis direction on the rectifying surface.

As shown in FIG. 4, the support receiving portion 5334 is in the vicinity of each claw portion 5333 </ b> B formed on the third side wall portion 5333 from the region surrounded by the side wall portions 5331 to 5333 on the −Y axial direction end surface of the base portion 531. It is erected for each. These support receiving portions 5334 are portions that support the power supply circuit board 51 from the + Y-axis direction when the power supply circuit board 51 is disposed with respect to the power supply casing 53.
More specifically, as shown in FIG. 6, these support receiving portions 5334 have a columnar shape with the columnar axis facing the Y-axis direction, the distal end portion 5334A is smaller in diameter than the proximal end portion 5334B, and the level difference A stepped shape having a portion 5334C is formed. When the power supply circuit board 51 is disposed with respect to the power supply casing 53, as shown in FIGS. 4 to 6, each support receiving portion is provided in a pair of circular holes 5121 formed in the printed wiring board 512. The front end portion 5334A of 5334 is inserted, and the end surface in the + Y-axis direction of the printed wiring board 512 abuts on the step portion 5334C of each support receiving portion 5334.

With the above configuration, the operator installs the power supply circuit board 51 with respect to the power supply casing 53 (second support portion 533) as shown below.
First, the operator moves the −Z-axis direction end portion of the printed wiring board 512 to the + Z-axis direction with the plurality of circuit elements 511 positioned in the + Y-axis direction and the pair of circular holes 5121 positioned on the + Z-axis direction side. The power supply circuit board 51 is inserted into the space Ar2 while being inclined so as to be positioned on the + Y-axis direction side with respect to the end portion in the axial direction. Then, the operator aligns the pair of circular holes 5121 in the printed wiring board 512 with the respective support receiving parts 5334, and sets the −Z-axis direction end parts of the printed wiring board 512 to the pair of protrusion parts 5332 </ b> A of the second side wall part 5332. Are fitted in a loosely fitted state. In this state, the printed wiring board 512 has an end in the + Z-axis direction in contact with each inclined surface 5333E of the pair of claws 5333B of the third side wall 5333, and is positioned on the −Y-axis direction side of the pair of claws 5333B. It is in the state.

  Next, the operator presses the + Z-axis direction end of the printed wiring board 512 toward the + Y-axis direction. At this time, the end in the + Z-axis direction of the printed wiring board 512 moves in the + Y-axis direction while being in sliding contact with the inclined surfaces 5333E of the pair of claw portions 5333B. That is, the inclined surface 5333E is an inclined surface that extends in the −Z-axis direction (the direction close to the second side wall portion 5332) as it goes in the + Y-axis direction (the storage direction of the power supply circuit board 51 in the space Ar2). Therefore, the pair of claw portions 5333B are pressed by the printed wiring board 512 as the + Z-axis direction end of the printed wiring board 512 moves in the + Y-axis direction, and the base end portion (protruding portion 5333C) is bent and the leading end portion ( The bent portion 5333D) gradually moves in the + Z-axis direction.

  When the operator moves the + Z-axis direction end portion of the printed wiring board 512 further to the + Y-axis direction side, the tip portions (bending portions 5333D) of the pair of claws 5333B further move in the + Z-axis direction, and the print The contact state between the + Z-axis direction end of the wiring board 512 and the inclined surface 5333E is released. That is, the pressing state from the printed wiring board 512 to the pair of claw portions 5333B is released. And a pair of nail | claw part 5333B returns to the deformation | transformation of a base end part (protrusion part 5333C), and a front-end | tip part (bending part 5333D) moves to a -Z-axis direction, and is set to an initial state.

In this state, the tip end portion 5334A of each support receiving portion 5334 is inserted into the pair of circular holes 5121 of the printed wiring board 512, and the + Y axial direction end surface of the printed wiring board 512 abuts on the stepped portion 5334C of each support receiving portion 5334. . In addition, the + Y-axis direction end surface of each bent portion 5333D in the pair of claw portions 5333B is in contact with the −Y-axis direction end surface of the printed wiring board 512.
That is, the movement of the power supply circuit board 51 in the Y-axis direction is restricted by sandwiching the printed wiring board 512 between the pair of protrusions 5332A and between the step parts 5334C and the bent parts 5333D. Further, the movement of the power supply circuit board 51 in the XZ plane is restricted by the fitting of the tip end portion 5334A of each support receiving portion 5334 to the pair of circular holes 5121.

The air introduction portion 534 is formed in each of the second side wall portions 5322 and 5332 described above, and fixes the cooling fan 54 to the power supply casing 53 and introduces air blown from the cooling fan 54 into the spaces Ar1 and Ar2. It is a part to do.
Here, as shown in FIG. 2, FIG. 4, or FIG. 5, the cooling fan 54 is configured by an axial fan that sucks and discharges air along the rotation axis of the fan, and is driven and controlled by the control device. .
As shown in FIG. 2 or 4, the air introduction portion 534 is formed so as to be positioned on the + X axis direction side in each of the second side wall portions 5322 and 5332 and straddle the second side wall portions 5322 and 5332. Has been. More specifically, as shown in FIG. 2 or FIG. 4, the air introduction part 534 includes a circular hole 5341 (FIG. 2) and a fixed frame-like part 5342.

As shown in FIG. 2, the circular hole 5341 is a circular hole that passes through the front and back of each of the second side wall portions 5322 and 5332, and the ventilation port 54 </ b> A through which air passes when air is sucked and discharged from the cooling fan 54. Are formed to have substantially the same planar shape.
As shown in FIG. 2 or 4, the fixed frame-shaped portion 5342 is a portion to which the cooling fan 54 is fixed, and a frame-shaped portion 5342 </ b> A having a circular frame shape protruding in the −Z-axis direction from the peripheral portion of the circular hole 5341. And a pair of fixing portions 5342B that are provided on the frame-like outer surface of the frame-like portion 5342A and fix the cooling fan 54. That is, the cooling fan 54 is brought into contact with the −Z-axis direction end portion of the fixed frame-shaped portion 5342 so that the ventilation opening 54A of the cooling fan 54 extends along the Z-axis direction, and the pair of fixing holes 54B of the cooling fan 54 are interposed. The cooling fan 54 is fixed to the air introduction part 534 by screwing the fixing screw 54C into the fixing part 5342B.

When the cooling fan 54 is driven, the air blown from the cooling fan 54 is guided to the circular hole 5341 by the frame-shaped portion 5342A and introduced into the spaces Ar1 and Ar2 through the circular hole 5341, respectively.
The air introduced into the space Ar1 flows in the + Z-axis direction and is rectified in the −X-axis direction by the rectifying unit 532B1 of the lid-like part 532B. The air introduced into the space Ar1 cools the light source driving circuit board 52 (the plurality of circuit elements 521 and the printed wiring board 522) disposed in the space Ar1 while flowing in the −X axis direction.
Similarly, the air introduced into the space Ar2 flows in the + Z-axis direction and is rectified in the −X-axis direction by the rectification unit 5335. The air introduced into the space Ar2 cools the power supply circuit board 51 (the plurality of circuit elements 511 and the printed wiring board 512) disposed in the space Ar2 while flowing in the −X axis direction.

The thermistor fixing portion 535 is a portion that is formed on the end surface in the + Y-axis direction of the base portion 531 and fixes the thermistor 55 to the power supply casing 53.
Here, the thermistor 55 is a general thermistor, and detects the temperature of the igniter transformer 521A (the temperature of the air flowing in the vicinity of the igniter transformer 521A in the space Ar1), and outputs a signal corresponding to the detected temperature to the control device. Output to.
As shown in FIG. 6, the thermistor fixing portion 535 is formed on the +5 axis direction end face of the base portion 531 at a position where it planarly interferes with a part of the igniter transformer 521 </ b> A when viewed from the X axis direction. . More specifically, as shown in FIG. 2, FIG. 3, or FIG. 6, the thermistor fixing portion 535 includes a pair of upright pieces 5351 and 5352 and a pair of connecting portions 5353 that connect the pair of upright pieces 5351 and 5352. , 5354 are integrally formed.

As shown in FIG. 2, FIG. 3, or FIG. 4, the pair of upright pieces 5351, 5352 are spaced apart by the same dimension as the outer dimension of the thermistor 55 in the Z-axis direction, and in the + Y-axis direction of the base portion 531. It is formed in a plate-like shape standing from the end face so as to be substantially parallel to the XY plane. Also, as shown in FIG. 2, FIG. 3, or FIG. 6, the pair of upright pieces 5351, 5352 gradually decreases in length along the Y-axis direction toward the -X-axis direction, and is viewed from the Z-axis direction. In the case of a plan view.
Of the pair of upright pieces 5351 and 5352, the + Y-axis direction edge of the upright piece 5351 positioned in the −Z-axis direction was cut out toward the −Y-axis direction side as shown in FIG. 2 or FIG. 3. A U-shaped notch 5351A is formed.
Further, as shown in FIG. 2, FIG. 3, or FIG. 6, a claw portion 5351B substantially similar to the claw portions 5323B and 5333B described above is formed at the edge portion in the −Y-axis direction of the notch 5351A.

  As shown in FIG. 6, the claw portion 5351B includes a protruding portion 5351C that protrudes in the + Y-axis direction substantially parallel to the XY plane from the −Y-axis direction edge portion of the notch 5351A, and a protruding-direction tip portion of the protruding portion 5351C. A bent portion 5351D that protrudes substantially orthogonal to the protruding portion 5351C is integrally formed, and is formed in a plate shape having an L shape in plan view (when viewed from the X-axis direction). The claw portion 5351B has a flexible base end portion of the protruding portion 5351C due to the rigidity of the material of the power supply casing 53 and the shape described above, and the bent portion 5351D is bent by the bending of the protruding portion 5351C. It can move in the Z-axis direction.

Further, in the bent portion 5351D, the corner portion on the + Y-axis direction side and the + Z-axis direction side is chamfered and has an inclined surface 5351E as shown in FIG. More specifically, the inclined surface 5351E is an inclined surface that goes in the + Z-axis direction as it goes in the -Y-axis direction.
The inclined surface 5351E of the bent portion 5351D is a portion that comes into contact with and is pressed by the thermistor 55 when the thermistor 55 is disposed with respect to the power supply casing 53.

As shown in FIGS. 2 to 6, the pair of connecting portions 5353 and 5354 are separated from each other by + Y of the pair of standing pieces 5351 and 5352 in a state of being separated by the same dimension as the outer dimension in the X-axis direction of the thermistor 55. The axial ends are connected to each other.
That is, with the above-described shape, the thermistor 55 can be fitted into the + Y-axis direction end portions of the pair of standing pieces 5351 and 5352 and the opening portion 535A as the inclined portion surrounded by the pair of connecting portions 5353 and 5354. .
In each of the pair of connecting portions 5353 and 5354, as shown in FIG. 2 or FIG. 3, the side end portions facing each other are protruded in the + Z-axis direction side and the + Y-axis direction side in directions close to each other. Projecting portions 5353A and 5354A are formed.
Further, in the pair of connecting portions 5353 and 5354, the side end portions facing each other are not specifically illustrated, but are offset in the −Y-axis direction with respect to the first projecting portions 5353A and 5354A. And the 2nd protrusion part which protrudes in the mutually adjacent direction is formed in the -Z-axis direction side from each 1st protrusion part 5353A, 5354A, respectively.

With the above configuration, the operator installs the thermistor 55 on the power supply casing 53 (thermistor fixing portion 535) as shown below.
First, the operator inclines the + Z-axis direction end portion of the thermistor 55 so as to be positioned on the −Y-axis direction side with respect to the −Z-axis direction end portion, and the + Z-axis direction end portion is set to each first protruding portion 5353A. , 5354 </ b> A and the second projecting portion (not shown), and abuts against the −Z-axis direction end face of the upright piece 5352. In this state, the thermistor 55 is in a state where the end portion in the −Z-axis direction is in contact with the inclined surface 5351E of the claw portion 5351B of the standing piece 5351 and is located on the + Y-axis direction side of the claw portion 5351B.

  Next, the operator presses the −Z-axis direction end of the thermistor 55 toward the −Y-axis direction. At this time, the −Z-axis direction end portion of the thermistor 55 moves in the −Y-axis direction while being in sliding contact with the inclined surface 5351E of the claw portion 5351B. That is, since the inclined surface 5351E is an inclined surface that goes in the + Z-axis direction as it goes in the -Y-axis direction, the claw portion 5351B moves along with the movement of the -Z-axis direction end of the thermistor 55 in the -Y-axis direction. When pressed by the thermistor 55, the base end portion (projecting portion 5351C) bends and the distal end portion (bending portion 5351D) gradually moves in the -Z-axis direction.

  When the operator further moves the −Z-axis direction end portion of the thermistor 55 further to the −Y-axis direction side, the tip portion (bending portion 5351D) of the claw portion 5351B further moves in the −Z-axis direction, and the thermistor 55 is moved. The contact state between the end in the −Z-axis direction and the inclined surface 5351E is released. That is, the pressing state from the thermistor 55 to the claw portion 5351B is released. And the nail | claw part 5351B is set to an initial state, when the bending of a base end part (protrusion part 5351C) returns, and a front-end | tip part (bending part 5351D) moves to + Z-axis direction.

In this state, the end surface of the thermistor 55 in the −Y-axis direction comes into contact with each of the second protrusions (not shown). Further, the + Y-axis direction end surface of the thermistor 55 comes into contact with the first projecting portions 5353A and 5354A and the −Y-axis direction end surface of the bent portion 5351D of the claw portion 5351B.
That is, the thermistor 55 is fitted into the opening 535A in a loosely fitted state, and both end surfaces in the Y-axis direction are not shown in the respective second protrusions, the first protrusions 5353A, 5354A, and the claws 5351B. It is clamped and fixed by the bent portion 5351D.
In a state where the thermistor 55 is installed with respect to the power supply casing 53, the opening 535A is closed and surrounded by the base 531, the pair of upright pieces 5351 and 5352, and the thermistor 55, and both sides in the X-axis direction are open. Then, an air flow passage C (FIG. 6) that allows air to flow in the X-axis direction is formed. As described above, the air flowing through the air near the igniter transformer 521A out of the air flowing into the space Ar1 and flowing in the −X-axis direction through the air flow path C when the cooling fan 54 is driven.
Further, in the state where the thermistor 55 is installed with respect to the opening 535A, the thermistor 55 is inclined with respect to the air flow direction (X-axis direction) in the air flow passage C due to the above-described shape of the opening 535A ( -Inclined state in the -Y-axis direction as it goes in the -X-axis direction). The thermistor 55 detects the temperature of the air flowing through the air flow passage C (the temperature of the igniter transformer 521A), and outputs a signal corresponding to the detected temperature to the control device.

The embodiment described above has the following effects.
In the present embodiment, in the power supply device 5, the power supply casing 53 that houses and arranges the electronic circuit module 5 </ b> A includes the base portion 531, the second side wall portions 5322 and 5332, the third side wall portions 5323 and 5333, and a support receiver. Parts 5324 and 5334. A pair of protrusions 5322A and 5332A and claw portions 5323B and 5333B are formed on the second side wall portions 5322 and 5332 and the third side wall portions 5323 and 5333, respectively. Accordingly, the electronic circuit module 5A can be fixed to the power supply casing 53 without using a fixing member such as a screw as in the prior art, and the power supply device 5 can be easily assembled and disassembled with a simple configuration. Can be implemented.

  In addition, the claw portions 5323B and 5333B are formed with inclined surfaces 5323E1 and 5333E that are inclined so as to gradually approach the second side wall portions 5322 and 5332 in the storage direction of the electronic circuit module 5A in the spaces Ar1 and Ar2. Has been. Thus, an operator who assembles the power supply device 5 moves the tip portions of the claw portions 5323B and 5333B without touching the claw portions 5323B and 5333B by simply pressing the printed wiring boards 512 and 522, and the power supply casing 53 is moved. An electronic circuit module 5A can be installed. For this reason, the work efficiency which assembles the power supply device 5 can be improved more.

  Here, the electronic circuit module 5A is composed of two bodies, that is, a power circuit board 51 and a light source drive circuit board 52. Correspondingly, two support portions 532 and 533 are provided in the power supply casing 53. . And each support part 532,533 is each formed in the Y-axis direction both end surface of the base 531, respectively. As a result, the power supply circuit board 51 and the light source drive circuit board 52 are installed in the power supply casing 53 in a state of being stacked with the base portion 531 interposed therebetween. For this reason, it is not necessary to provide two power supply cases corresponding to the power supply circuit board 51 and the light source drive circuit board 52, and the power supply circuit board 51 and the light source drive circuit board 52 are accommodated in a single power supply case 53. Can be placed. Further, since the power supply circuit board 51 and the light source drive circuit board 52 can be housed and disposed in a single power supply casing 53, the power supply device 5 can be reduced in size.

  In addition, since the power supply casing 53 includes the air introduction portion 534 that can fix the cooling fan 54 so as to straddle the side end portion of the base portion 531, the air discharged from the cooling fan 54 is + Y of the base portion 531. Air can be blown to both the light source drive circuit board 52 disposed on the axial direction side and the power supply circuit board 51 disposed on the −Y axial direction side of the base portion 531, and the electronic circuit module 5 </ b> A can be efficiently cooled.

Further, the power supply casing 53 includes a thermistor fixing portion 535 for fixing the thermistor 55. This eliminates the need to mount a thermistor on the printed wiring board 522, and does not reduce the degree of freedom in designing the light source driving circuit board 52. Further, the thermistor fixing portion 535 is formed at a position where the thermistor fixing portion 535 planarly interferes with a part of the igniter transformer 521A when viewed from the X-axis direction on the end surface of the base portion 531 in the + Y-axis direction. Therefore, only the air that circulates in the vicinity of the igniter transformer 521A that is the temperature detection target can be circulated to the thermistor fixing portion 535, so that other air can be prevented from being mixed, and the thermistor 55 Can accurately detect the temperature of the igniter transformer 521A.
Further, the thermistor 55 is disposed in a state inclined with respect to the air flow direction in the air flow passage C with respect to the thermistor fixing portion 535. For this reason, due to the characteristics of the thermistor 55, for example, in the configuration in which the thermistor 55 is fixed substantially parallel to the air flow path C, it becomes difficult to detect the temperature of the air with the thermistor 55. By tilting, the thermistor 55 can satisfactorily detect the air temperature.

It should be noted that the present invention is not limited to the above-described embodiments, and modifications, improvements, and the like within the scope that can achieve the object of the present invention are included in the present invention.
In the above-described embodiment, the electronic circuit module 5A is composed of the power supply circuit board 51 and the light source driving circuit board 52. The functions of the light source drive circuit board and the power supply circuit board may be configured as a single unit.

In the above embodiment, the inclined surfaces 5323E1 and 5333E are formed on the claw portions 5323B and 5333B. However, the present invention is not limited to this, and the inclined surfaces 5323E1 and 5333E may not be formed.
In the embodiment, the power supply circuit board 51 and the light source drive circuit board 52 are configured to be stacked in the thickness direction (Y-axis direction) of the projector 1, but the present invention is not limited thereto, and the plane is orthogonal to the thickness direction. It does not matter as a structure arranged in parallel. In this case, in the power supply housing 53, the first support portion 532 and the second support portion 533 are formed on the same end surface of the base portion 531.

In the embodiment, the light source device 41 is configured as a discharge light-emitting light source device. However, the light source device 41 is not limited to this, and a laser diode, an LED (Light Emitting Diode), an organic EL (Electro Luminescence) element, a silicon light-emitting element, or the like. Various solid-state light emitting devices may be employed.
In the above embodiment, only one light source device 41 is used and the color separation optical device 43 separates the light into three color lights. However, the color separation optical device 43 is omitted, and three color lights are emitted respectively. You may comprise the said solid light emitting element as a light source device.
In the above-described embodiment, the cross dichroic prism 454 is used as the color combining optical device. However, the present invention is not limited to this, and a configuration may be adopted in which each color light is combined by using a plurality of dichroic mirrors.

In the embodiment, the projector 1 is configured by a three-plate projector having three liquid crystal panels 451. However, the projector 1 may be configured by a single-plate projector having one liquid crystal panel. Moreover, you may comprise as a projector provided with two liquid crystal panels, or a projector provided with four or more liquid crystal panels.
In the embodiment, a transmissive liquid crystal panel having a different light incident surface and light emitting surface is used. However, a reflective liquid crystal panel having the same light incident surface and light emitting surface may be used.
In the embodiment, the liquid crystal panel is used as the light modulation device. However, a light modulation device other than liquid crystal, such as a device using a micromirror, may be used. In this case, the polarizing plates 452 and 453 on the light incident side and the light emitting side can be omitted.

  In the above embodiment, only an example of a front type projector that projects from the direction of observing the screen has been described, but the present invention is also applicable to a rear type projector that projects from the side opposite to the direction of observing the screen. Is possible.

Although the best configuration for carrying out the present invention has been disclosed in the above description, the present invention is not limited to this. That is, the invention has been illustrated and described primarily with respect to particular embodiments, but it is not intended to depart from the technical concept and scope of the invention. Various modifications can be made by those skilled in the art in terms of materials, quantity, and other detailed configurations.
Therefore, the description limited to the shape, material, etc. disclosed above is an example for easy understanding of the present invention, and does not limit the present invention. The description by the name of the member which remove | excluded the limitation of one part or all of such restrictions is included in this invention.

  Since the power supply apparatus can be easily assembled and disassembled, the present invention can be used as a power supply apparatus for a projector used in presentations and home theaters.

FIG. 2 is a diagram schematically showing a schematic configuration of a projector in the embodiment. The figure which shows the structure of the power supply device in the said embodiment. The figure which shows the structure of the power supply device in the said embodiment. The figure which shows the structure of the power supply device in the said embodiment. The figure which shows the structure of the power supply device in the said embodiment. The figure which shows the structure of the power supply device in the said embodiment.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 ... Projector, 3 ... Projection lens (projection optical apparatus), 5 ... Power supply device, 5A ... Electronic circuit module, 41 ... Light source device, 51 ... Power supply circuit board, 52 ..Light source drive circuit board, 53... Power supply casing, 54... Cooling fan, 55... Thermistor, 451... Liquid crystal panel (light modulation device), 511, 521. 512, 522 ... Printed wiring board, 531 ... Base, 534 ... Air introduction part, 535 ... Thermistor fixing part, 535A ... Opening (inclined part), 5322 ... Second Side wall portion (side wall portion for light source driving circuit), 5322A, 5332A ... projection, 5323 ... third side wall portion (side wall portion for light source driving circuit), 5323B, 5333B ... claw portion, 5323E1, 5333E ... Inclined surfaces, 324... Support receiving portion (light source driving circuit support receiving portion), 5332... Second side wall portion (power supply circuit side wall portion), 5333... Third side wall portion (power supply circuit side wall portion) , 5334... Support receiving portion (side wall portion for power supply circuit), Ar1, Ar2... Space.

Claims (5)

A light source device, a light modulation device that modulates a light beam emitted from the light source device in accordance with image information, a projection optical device that enlarges and projects the light beam modulated by the light modulation device, and power to each component A projector having a power supply device to supply,
The power supply device
An electronic circuit module having a plurality of circuit elements and a printed wiring board on which the plurality of circuit elements are mounted;
A power supply housing for storing and arranging the electronic circuit module;
The power supply casing is
A plate-like base;
The electronic circuit module can be housed and disposed in a space surrounded by the base portion in a state where one surface of the printed wiring board faces the plate surface of the base portion and is erected from the plate surface of the base portion. A pair of side wall portions,
A thermistor fixing part capable of fixing a thermistor for detecting the temperature of air circulating in the vicinity of a predetermined circuit element among the plurality of circuit elements;
The thermistor fixing part is
A pair of upright pieces projecting from the plate surface of the base so as to face each other and extending along a flow direction of air flowing in the vicinity of the predetermined circuit element;
A pair of connecting portions for connecting the tip portions of the pair of upright pieces,
The pair of upright pieces is
The height dimension from the plate surface of the base is formed so as to decrease toward the downstream side of the air flowing in the vicinity of the predetermined circuit element,
The thermistor is
Fitted between the pair of connecting portions, circulates in the vicinity of the predetermined circuit element, and is taken into a cylindrical space surrounded by the base, the pair of standing pieces, the pair of connecting portions, and the thermistor. A projector characterized by detecting the temperature of the air . The projector according to claim 1, wherein
The power supply casing is
Standing up from the plate surface of the base, comprising a support receiving portion for supporting the electronic circuit module in contact with one surface of the printed wiring board,
One of the pair of side wall portions is formed with a pair of protrusions that protrude from an end surface facing the other side wall portion and that can be fitted with a side end portion of the printed wiring board.
The other side wall portion of the pair of side wall portions is formed with a claw portion that protrudes in a direction substantially orthogonal to the plate surface of the base portion, and a protruding direction front end portion bends toward the one side wall portion,
The claw portion is configured such that a base end portion is flexible and a tip end portion can be separated from and close to the one side wall portion, and the electronic circuit module is accommodated and disposed in the power supply housing. In a state, the side end portion of the printed wiring board that contacts the other surface of the printed wiring board and that is opposed to the side end portion that is fitted to the pair of protrusions moves away from the space. A projector characterized by regulation. The projector according to claim 2 ,
The claw portion comes into contact with the printed wiring board when the electronic circuit module is stored in the space, and gradually approaches the one side wall portion in the storage direction of the electronic circuit module in the space. A projector characterized in that an inclined surface is formed. In the projector according to claim 2 or 3 ,
The electronic circuit module is composed of two bodies: a light source drive circuit board that drives the light source device and a power supply circuit board that supplies power to each component including the light source drive circuit board.
The pair of side wall portions is
Corresponding to the electronic circuit module, a pair of light source driving circuit side walls that can be stowed from one plate surface of the base so that the light source driving circuit board can be housed and disposed, and stand from the other plate surface of the base. And a pair of power supply circuit side walls that can accommodate and arrange the power supply circuit board,
The support receiving portion is
Corresponding to the electronic circuit module, the light source driving circuit support receiving portion that stands upright from one plate surface of the base portion and supports the light source driving circuit substrate, and the power source standing up from the other plate surface of the base portion A power supply circuit support receiving portion for supporting a circuit board. The projector according to claim 4 , wherein
The power supply casing is
A cooling fan can be fixed so as to straddle the side end of the base, and an air introduction part is provided for introducing air discharged from the cooling fan to one plate surface side and the other plate surface side of the base portion. A projector characterized by that.

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