JP2000137291A - Exhaust guide and projector provided with the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an exhaust guide capable of arbitrarily changing an exhausting direction in either direction of the front side, the rear side, the upper side or the lower side of a housing so that hot air does not dash against peripheral equipments, operators and auditors directly and to provide a projector which is provided with the exhaust guide. SOLUTION: This guide is an exhaist guide 12 which is provided by covering the exhaust port formed on the side face of a housing 10 and is provided attachably and detachably to the side face of the housing 10. In the exhaust guide, many exhaust guide holes 12d are provided roughly in parallel by being inclined so as to form a prescribed angle with respect to the side face and they are made to be restrainable at arbitrary rotated positions in the side face of this housing with respect to the housing 10.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an exhaust guide which is provided in a housing of an apparatus and which exhausts the housing to suppress a rise in temperature inside the housing, and an exhaust guide provided with the exhaust guide. It relates to a projector.

[0002]

2. Description of the Related Art Conventionally, in a device such as a projector, a lamp house as a light source and a projection lens are positioned diagonally in a rectangular parallelepiped housing, and the lamp house is arranged behind a set. It has become. By the way, in such a projector, since a large amount of heat is generated in the lamp house and this heat may have an adverse effect on the internal equipment, the exhaust ports for exhausting the hot air in the housing are provided on the left and right side surfaces of the housing. Either is provided. And, due to the infrared and ultraviolet rays generated by the lamp, the vicinity of the lamp house is very hot, and thus the exhaust from the housing is heated quite hot. By the way, the side of the housing is often provided with an operator or a peripheral device or an auditory seat. Therefore, the hot air discharged from the exhaust port of the housing causes the peripheral device, the operator, or the observer There is a problem that it hits directly. In order to improve this problem, for example, a technique disclosed in Japanese Patent Application Laid-Open No. 9-133967 has been proposed. This technique is described in FIGS.
As shown in FIG. 1, a lamp house 2 which is a light source installed in a housing 1 is arranged in parallel with a projection lens 3 and the lamp house 2 and the projection lens 3 are arranged in parallel.
Is disposed near the front surface (the right surface in the figure) of the housing 1, and an exhaust fan 4 for exhausting heated air in the lamp house 2 is provided in front of the lamp house 2.
Further, an exhaust port 5 is formed in a front portion of the housing 1 facing the exhaust fan 4. In FIG. 6, reference numeral 6 denotes a reflection type panel, and a dichroic prism 7 and a plano-convex lens 8 are provided in front of the reflection type panel.
A plurality of reflection mirrors 9 for guiding light emitted from the lamp house 2 to the reflection type panel 6 are provided.

[0003]

However, in the above-described front exhaust by arranging the lamp house 2 and the exhaust port 5 in front, the exhaust direction is determined by the arrangement of the lamp house 2, so that the exhaust direction is restricted to one direction. Will be done. In addition, the arrangement of the lamp house 2 is restricted on the same side as the emission direction of the projection lens 3, so that the internal configuration of the set and the arrangement of the optical system are restricted. Further, as described above, the lamp house 2 as the light source is connected to the projection lens 3.
When arranged on the same side as the projection direction, the optical axis of the light emitted from the lamp house and the emission direction of the projection lens 3 become parallel. However, as shown in FIG. When the projection angle α is set, the lamp in the lamp house 2 is maintained in a state of being inclined with respect to the horizontal plane. Problem.

[0004] The present invention has been made in view of such a conventional problem, and in order to prevent hot air from directly shining on peripheral devices, an operator, and a viewer, the exhaust direction is set to the front side of the housing and the rear side. A first object is to provide an exhaust guide that can be arbitrarily changed in any of the side, upper, and lower directions, and a projector provided with the exhaust guide. It is another object of the present invention to provide a projector capable of maintaining a stable lamp performance by eliminating the inclination of the lamp even when the projection angle of the projector is set.

[0005]

According to a first aspect of the present invention, there is provided an exhaust guide provided to cover an exhaust port formed on a side surface of a housing in order to achieve the above-mentioned object. A large number of exhaust guide holes are provided on the side surface of the housing so as to be detachable and inclined at a predetermined angle with respect to the side surface of the housing. In which it can be locked at the turning position. An exhaust guide according to a second aspect of the present invention is characterized in that the exhaust guide is rotatable at intervals of 90 ° within the side surface of the housing according to the first aspect. According to a third aspect of the present invention, in the exhaust guide, an inner peripheral shape of the exhaust port according to any one of the first and second aspects, and a mounting portion of the exhaust guide with the exhaust port is substantially square. It is characterized by being formed in a shape. According to a fourth aspect of the present invention, the exhaust guide according to the third aspect has a first locking portion to which a side edge portion of the exhaust port is fitted, and a position opposed to the first locking portion. And a second locking portion to which a side edge portion of the exhaust port is fitted, and one of the first locking portion and the second locking portion is connected to the exhaust port. Is configured to be elastically deformable so as to allow engagement and disengagement with the side edge portion. Claim 5 of the present invention
The projector according to any one of claims 1 to 4,
The exhaust guide according to any one of the above. A projector according to a sixth aspect of the invention is characterized in that an exhaust fan is provided at a position facing the exhaust guide according to the fifth aspect. A projector according to a seventh aspect of the invention is characterized in that a light source is installed near the exhaust fan according to the sixth aspect. The projector according to claim 8 of the present invention is configured such that the optical axis of the light source according to claim 7 is set horizontally, and a projection lens that emits light emitted from the light source to the outside includes a light source of the light source. It is characterized by being installed at a position substantially orthogonal to the axis and separated from the optical axis.

According to the exhaust guide according to any one of the first to fourth aspects of the present invention, the exhaust guide hole is formed at a predetermined angle with respect to the side surface of the housing, so that the exhaust is formed in the housing. By being evacuated at a predetermined angle with respect to the housing and being capable of being locked at an arbitrary rotation position within the side surface of the housing, the rotation locking position can be set arbitrarily. The exhaust direction can be set arbitrarily. By setting the rotation guide position of the exhaust guide at every 90 °, the exhaust direction can be changed in four directions, that is, forward, rearward, upward, and downward of the housing. It is possible to set the direction and easily avoid the direction in which the user does not want to exhaust. Further, as in the third aspect of the present invention, the attachment portion between the exhaust port and the exhaust guide is formed in a substantially square shape, so that the attachment to the exhaust port when the direction of the exhaust guide is changed is simplified. Can be. As in the invention as set forth in claim 4, a first locking portion to which a side edge portion of the exhaust port is fitted, and a position facing the first locking portion, wherein the first locking portion is formed at a position opposite to the first locking portion. The second side edge is fitted
And one of the first locking portion and the second locking portion can be elastically deformed so as to allow engagement and disengagement with the side edge of the exhaust port. By doing
The attachment and detachment of the exhaust guide can be performed easily and reliably. According to the invention described in claim 5 of the present invention, it is possible to obtain a projector capable of exhausting heated air in the inside in any direction. By providing an exhaust fan at a position facing the exhaust guide, the air in the housing is smoothly guided to the exhaust guide, and a rise in the temperature in the housing is smoothly suppressed. By bringing the exhaust fan and the light source close to each other as in the invention according to claim 7,
By positively exhausting the air in the heat generating portion, a rise in the temperature inside the housing can be effectively suppressed. According to the invention described in claim 8, the optical axis of the light source is set horizontally, and the projection lens that emits light emitted from the light source to the outside is substantially orthogonal to the optical axis of the light source. In addition, by installing the lens at a position away from the optical axis, the optical axis of the light source can be moved in parallel in the horizontal direction even when the projection lens is moved up and down to change the projection angle. This makes it possible to eliminate the inclination of the light source with respect to the horizontal direction, thereby suppressing deterioration of the lamp and deterioration in performance.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to FIGS. In the following description, the right side in FIGS. 1, 3, and 5 is referred to as the front, and the left side is referred to as the rear.

1 and 2 show a projector according to this embodiment. In FIG. 1, reference numeral 10 denotes a housing. As shown in FIG. 3, an exhaust port 11 is formed at a rear position on one side of the housing 10, and an exhaust guide 12 is detachably attached so as to cover the exhaust port 11. These exhaust port 11 and exhaust guide 1
2 is formed in a square shape as a whole, and the exhaust guide 12 includes a contact piece 12 whose peripheral edge is brought into contact with the outer surface of the housing 10 at the peripheral edge of the exhaust port 11.
In addition, a pair of engagement pieces 12b are provided on one side of the periphery of the exhaust port 11 so as to be in contact with the inner surface of the housing 10. Further, on the side of the exhaust guide 12 opposite to the side on which the engagement piece 12b is provided, a hook 12c is formed at the periphery of the exhaust port 11 so as to be in contact with the inner surface of the housing 10. The hook 12 is elastically deformable toward the center of the exhaust guide 12, and the hook 12 moves over the peripheral edge of the exhaust port 11 by elastic deformation toward the center of the exhaust guide 12. In the present embodiment, the pair of engagement pieces 12b and a part of the contact pieces 12a
The hook 12c and the contact piece 12a
And a part of the second locking portion. Also,
On the inside of the contact piece 12a of the exhaust guide 12, a large number of exhaust guide holes 12d are formed in parallel with each other at a predetermined angle with respect to the surface of the exhaust guide 12, as shown in FIG. Have been. In the present embodiment, the inclination of the exhaust guide hole 12d is set so that the exhaust guide direction is directed to the hook 12c.

On the other hand, as shown in FIG. 3, an exhaust fan 13 for feeding internal air toward the exhaust port 11 is provided at a rear corner of the housing 10 opposite to the exhaust port 11. Is provided, and the exhaust fan 13
Inside, a lamp house 14 serving as a light source is provided. The lamp house 14 is installed so that its optical axis is horizontal and substantially parallel to the rear end surface of the housing 10.

Also, the lamp house 1 of the housing 10
A projection lens 15 for projecting the light emitted from the lamp house 14 to the outside is provided at a corner diagonally opposite to the corner where the light source 4 is provided. It is installed so as to be orthogonal to the optical axis.

The lamp house 14 and the projection lens 1
5, a reflection type panel 16 is installed so as to be substantially coaxial with the projection lens 15, and a dichroic prism 17 and a plano-convex lens 18 are provided in front of the reflection type panel 16,
A plurality of reflection mirrors 19 for guiding the light emitted from the lamp house 2 to the reflection type panel 16 are provided between these and the lamp house 14.

In the exhaust guide 12 and the projector according to the present embodiment configured as described above, the exhaust guide 1
2 as shown in FIG. 1 and FIG.
When the exhaust fan 13 is operated and the exhaust is started by attaching the exhaust port 11 to the exhaust port 11 so as to be downward, the exhaust is discharged to the outside through an exhaust guide hole 12 d formed in the exhaust guide 12. Since the exhaust guide holes 12d are set downward, the exhaust is discharged downward of the housing 10 as shown by the arrow in FIG. Since the exhaust fan 13 is provided in the vicinity of the lamp house 14 and is provided to face the exhaust port 11, the air in the hottest part is quickly discharged to the outside.

On the other hand, once the exhaust guide 12 is
After removal from 0, as shown in FIGS. 4 and 5,
From the state where the engagement piece 12b is engaged with the inside of the rear edge of the exhaust port 11, the hook 12c is elastically deformed while the exhaust port 11 is
And the hook 12c is engaged with the inside of the front edge of the exhaust port 11, whereby the exhaust guide hole 12d of the exhaust guide 12 can be directed forward of the housing 10. As a result, the exhaust direction is changed to the front of the housing 10. Therefore, in this embodiment,
By changing the mounting state of the exhaust guide 12,
The exhaust direction can be changed to four directions, that is, the front, rear, upper, and lower sides of the housing 10, and according to the positional relationship between the position where the projector is installed and the operator, peripheral devices, or observers. It is possible to easily change the exhaust direction, and it is possible to prevent hot air from hitting the operator, peripheral devices, observers, and the like.

In this embodiment, the optical axis of the light emitted from the lamp house 14 is set in the horizontal direction,
Further, since the projection direction of the projection lens 15 is orthogonal to the optical axis, even if the projection angle is changed, the optical axis of the light emitted from the lamp house 14 is always kept in a horizontal state, It is possible to prevent the lamp from being deteriorated due to the inclination.

Note that the shapes, dimensions, and the like of each component shown in the above embodiment are merely examples, and can be variously changed based on design requirements and the like. For example, in the above-described embodiment, an example has been described in which the shape of the exhaust guide 12 is square, but a circular shape may be used instead. With such a shape, the rotation position of the exhaust guide 12 is not restricted, and a wider range of exhaust directions can be set.

[0016]

As described above, according to any one of the first to fourth aspects of the present invention, the exhaust guide hole inclined at a predetermined angle with respect to the side surface of the housing is formed. Thereby, the exhaust is exhausted at a predetermined angle with respect to the housing, and with respect to the housing,
By being able to be locked at an arbitrary rotation position in the side surface, the exhaust direction can be arbitrarily set by setting the rotation locking position arbitrarily.
With this, it is possible to easily change the exhaust direction according to the positional relationship between the position where the housing is installed and the operator, peripheral devices or observers, etc., and hot air is blown to the operator, peripheral devices or observers. Hitting can be prevented. By setting the rotation locking position of the exhaust guide at every 90 ° as in the second aspect of the invention,
The exhaust direction can be set to four directions, that is, the front, rear, upper, and lower sides of the housing, and the direction in which exhaust is not desired can be easily avoided. Further, as in the third aspect of the present invention, the attachment portion between the exhaust port and the exhaust guide is formed in a substantially square shape, so that the attachment to the exhaust port when the direction of the exhaust guide is changed is simplified. Can be. As in the invention as set forth in claim 4, a first locking portion to which a side edge portion of the exhaust port is fitted, and a position facing the first locking portion, wherein the first locking portion is formed at a position opposite to the first locking portion. A second locking portion to which a side edge portion is fitted;
Either the locking portion or the second locking portion is configured to be elastically deformable so as to allow engagement and disengagement with the side edge of the exhaust port, so that the exhaust guide can be easily attached and detached. It can be performed reliably. According to the invention described in claim 5 of the present invention, it is possible to obtain a projector capable of exhausting heated air in the inside in any direction. By providing an exhaust fan at a position facing the exhaust guide, as in the invention according to claim 6,
The air in the housing can be smoothly guided to the exhaust guide, and the temperature rise in the housing can be suppressed smoothly. By bringing the exhaust fan and the light source close to each other as in the invention according to claim 7, the heat can be reduced. By positively exhausting the air in the portion where the airflow occurs, the temperature rise in the housing can be effectively suppressed. According to the invention described in claim 8, the optical axis of the light source is set horizontally, and the projection lens that emits light emitted from the light source to the outside is substantially orthogonal to the optical axis of the light source. In addition, by installing the lens at a position away from the optical axis, the optical axis of the light source can be moved in parallel in the horizontal direction even when the projection lens is moved up and down to change the projection angle. This makes it possible to eliminate the inclination of the light source with respect to the horizontal direction, thereby suppressing deterioration of the lamp and deterioration in performance.

[Brief description of the drawings]

FIG. 1 is a side view showing an embodiment of the present invention.

FIG. 2 is a sectional view taken along line AA of FIG.

FIG. 3 is a sectional view taken along line CC of FIG. 1;

FIG. 4 is a side view for explaining the function of the present invention.

FIG. 5 is a sectional view taken along line BB of FIG. 4;

FIG. 6 is a transverse sectional view of a projector showing one conventional example.

FIG. 7 is a schematic side view of a projector showing a conventional example.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Housing 2 Lamp house (light source) 3 Projection lens 4 Exhaust fan 5 Exhaust port 6 Reflective panel 7 Dichroic prism 8 Plano-convex lens 9 Reflection mirror 10 Housing 11 Exhaust port 12 Exhaust guide 12a Contact piece 12b Engagement piece (first) 12c Hook (second engaging portion) 12d Exhaust guide hole 13 Exhaust fan 14 Lamp house 15 Projection lens 16 Reflective panel 17 Dichroic prism 18 Plano-convex lens 19 Reflection mirror α Projection angle

Claims (8)

[Claims] An exhaust guide provided to cover an exhaust port formed on a side surface of a housing, the exhaust guide being detachably provided on a side surface of the housing, and being inclined at a predetermined angle with respect to the side surface of the housing. A plurality of exhaust guide holes provided substantially in parallel with each other, and the exhaust guide can be locked to an arbitrary rotation position within a side surface of the housing. 2. The housing according to claim 1, wherein the housing is rotatable at every 90 ° in a side surface thereof.
Exhaust guide described in. 3. The exhaust port according to claim 1, wherein an inner peripheral shape of the exhaust port and a mounting portion of the exhaust guide to the exhaust port are formed in a substantially square shape. Exhaust guide described in. 4. A first locking portion to which a side edge of the exhaust port is fitted, and a position formed opposite to the first locking portion, wherein the side edge of the exhaust port is fitted. A second locking portion to be engaged, and either one of the first locking portion and the second locking portion allows engagement and disengagement with the side edge of the exhaust port. The exhaust guide according to claim 3, wherein the exhaust guide is configured to be elastically deformable. 5. A projector comprising the exhaust guide according to claim 1. 6. The projector according to claim 5, wherein an exhaust fan is provided at a position facing the exhaust guide. 7. The projector according to claim 6, wherein a light source is provided near the exhaust fan. 8. An optical axis of the light source is set horizontally, and a projection lens that emits light emitted from the light source to the outside is substantially orthogonal to an optical axis of the light source, and a projection lens extends from the optical axis. The projector provided with the exhaust guide according to claim 7, wherein the projector is installed at a separated position.