JP2011002504A - Projection image display device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a projection image display device easily installed so that an image may be displayed horizontally.SOLUTION: The projector 1 includes a projection lens 3 projecting light for displaying an image, a housing 2 housing the projection lens 3, and two adjusting legs 5 protruding from the housing 2 and supporting the housing 2. By rotating the adjusting legs 5, lengths L of the adjusting legs 5 protruding from the housing 2 can be adjusted. A mark 60 for making the lengths L of the adjusting legs 5 protruding from the housing 2 so that the image may be displayed horizontally correspond to each other is provided on each of the adjusting legs 5.

Description

  The present invention includes an optical component, a housing for housing the optical component, and a plurality of adjusting legs that support the housing, and the length of the adjusting leg protruding from the housing is adjusted by rotating the adjusting leg. The present invention relates to a projection-type image display apparatus that has been made possible.

  As a projection-type image display device that projects light by projecting light, a projector is known that protrudes from a housing that houses optical components and includes a plurality of adjusting legs that support the housing. By rotating, the length by which the adjustment leg protrudes from the housing can be adjusted (see, for example, Patent Document 1).

  Specifically, as shown in FIG. 8, a conventional projector 101 includes a housing 102 that houses at least the projection lens 103, and at least two adjustment legs 105 that protrude from the housing 102 and support the housing 102. I have. By rotating each of the adjusting legs 105, the length L (see FIG. 10) that the adjusting legs 105 protrude from the housing 102 can be independently adjusted.

  If the length L of each of the plurality of adjusting legs 105 protruding from the housing 102 can be adjusted independently, the adjusting legs 105 can be mounted on the housing even when the projector 101 is installed on an inclined surface that is not horizontal. It is possible to adjust the length L protruding from the body 102 so that the image is displayed horizontally as indicated by the solid square in FIG.

  Note that “video is displayed horizontally” means that the video is displayed with the sides forming the outer shape of the video parallel to the horizontal direction. Specifically, as shown in FIG. 9, an image generally projected and displayed on a plane has a rectangular shape with an aspect ratio of 4: 3 or 16: 9, and the outer shape of the image is 4. It consists of two sides E1, E2, E3, E4. Therefore, in the image shown in FIG. 9, “image is displayed horizontally” means that a pair of parallel sides E1 and E3 forming the outer shape of the rectangular image are parallel to the horizontal direction. A video is displayed.

JP 2003-21866 A

  By the way, when the installation surface on which the projector 101 is installed is a horizontal plane, if the lengths L by which the two adjustment legs 105 protrude from the housing 102 are the same, the image is displayed horizontally. However, since the plurality of adjustment legs 105 can independently adjust each of the lengths L protruding from the housing 102, it is complicated to install the projector 101 so that the image is displayed horizontally. was there.

  Specifically, in order for the image to be displayed horizontally when the projector 101 is installed on a horizontal plane, it is necessary to make the lengths L of the adjustment legs 105 protruding from the housing 102 the same. However, as shown in FIG. 10, if the difference between the length L1 from which one adjustment leg 105 protrudes from the housing 102 and the length L2 from which the other adjustment leg 105 protrudes from the housing 102 is small, It is difficult to visually recognize the difference between the lengths L of the adjustment legs 105 protruding from the housing 102. The adjustment leg 105 may be formed with a spiral groove, or may have protrusions or grooves (both not shown) at equal intervals in the direction in which the adjustment leg 105 rotates (so-called circumferential direction). In any case, however, it is difficult to recognize the difference between the lengths L of the adjustment legs 105 protruding from the housing 102 even if these protrusions and grooves are referred to. As a result, when the projector 101 is installed on a horizontal plane in a state where the lengths L of the adjustment legs 105 projecting from the housing 102 are different, as shown by a dashed-dotted rectangle in FIG. A tilted image will be displayed.

  Therefore, a person who installs the projector 101 so that the image is displayed horizontally refers to the image actually displayed on the plane, and the adjustment leg 105 is moved from the housing 102 according to the degree of inclination of the image. The protruding length L can be adjusted. However, since it is necessary to refer to the image at any time in order to finely adjust the length L of the adjustment leg 105 protruding from the housing 102, it is complicated to install the projector 101 so that the image is displayed horizontally. There was a problem.

  The present invention has been made in view of such circumstances, and an object thereof is to provide a projection display apparatus that can be easily installed so that an image is displayed horizontally.

  The invention according to claim 1 includes an optical component that projects light for displaying an image, a housing that houses the optical component, and a plurality of adjustment legs that protrude from the housing and support the housing. , A projection-type image display device in which the length of the adjustment leg protruding from the housing can be adjusted by rotating the adjustment leg, and adjusted so that the image is displayed horizontally on each of the adjustment legs. A mark for making each length which a leg protrudes from a housing | casing respond | correspond is provided.

  According to this configuration, each of the plurality of adjusting legs is provided with a mark for making the lengths of the adjusting legs projecting from the casing correspond to each other so that the image is displayed horizontally. For this reason, a person who intends to install a projection-type image display device refers to a mark provided on each of the adjustment legs so that the adjustment legs protrude from the housing so that the image is displayed horizontally. Can be adjusted. Therefore, it is possible to adjust the length of the adjustment leg protruding from the housing so that the image is displayed horizontally without referring to the actually displayed image, so that the image is displayed horizontally. Thus, it is possible to easily install the projection display apparatus.

  The invention according to claim 2 is the projection display apparatus according to claim 1, wherein when the plurality of adjustment legs protrude from the housing have the same length, the adjustment legs are provided on each of the adjustment legs. The mark is directed in the same direction.

  According to this configuration, when the lengths of the plurality of adjustment legs protruding from the housing are the same, the marks provided on each of the adjustment legs face the same direction. For this reason, a person who rotates the adjustment leg refers to the direction of the mark provided on each of the adjustment legs so that the lengths of the plurality of adjustment legs protruding from the housing are the same. The length protruding from the housing can be adjusted.

  A third aspect of the present invention is the projection display apparatus according to the first or second aspect, wherein the adjusting leg has a diameter compared to the rotating shaft provided with the male screw portion and the rotating shaft. A large-diameter portion, and the mark is a part of the large-diameter portion and is provided on the outer peripheral surface facing the radial direction. The “radial direction” is a direction perpendicular to the axis that is the rotation center of the adjustment leg.

  According to this configuration, the mark provided on each of the adjustment legs is a part of the large-diameter portion having a larger diameter than the rotation shaft, and is provided on the outer peripheral surface facing the radial direction. For this reason, compared with the case where the mark is provided on the rotating shaft, the direction in which the mark is directed can be easily understood.

  A fourth aspect of the present invention is the projection display apparatus according to any one of the first to third aspects, wherein light for displaying an image is projected forward from the casing. Two adjusting legs are provided on the front side of the body.

  According to this configuration, since the two adjustment legs are provided on the front side of the casing (that is, the side on which light for displaying an image is projected), the adjustment legs are fixed by fixing the rear side of the casing. By adjusting the length of the protrusion from the housing, the elevation angle, which is the angle between the horizontal plane and the direction in which the light is projected, can be adjusted.

  A fifth aspect of the present invention is the projection display apparatus according to any one of the first to fourth aspects, wherein the mark is one protrusion formed so as to protrude in the radial direction. It is characterized by that.

  A sixth aspect of the present invention is the projection display apparatus according to any one of the first to fourth aspects, wherein the mark is a single groove formed to be recessed in the radial direction. It is characterized by that.

  According to this configuration, since the mark provided on each of the adjustment legs is a single protrusion or groove, a person who intends to install the projection display apparatus can move the position of the mark when rotating the adjustment leg. Can be known by touch.

  A seventh aspect of the present invention is the projection display apparatus according to any one of the first to sixth aspects, wherein the mark is composed of a color different from the surrounding color of the mark. It is characterized by.

  According to this configuration, the mark provided on each of the adjustment legs is configured by a color different from the surrounding color of the mark, so that the mark can be made conspicuous by color.

  According to the present invention, it is possible to easily install the projection display apparatus so that the image is displayed horizontally.

1 is a perspective view showing an external appearance of a projector according to an embodiment of the invention. The schematic diagram for demonstrating the installation aspect of the projector which concerns on the same embodiment. The schematic diagram which shows the adjustment leg and axial support which concern on the same embodiment. The perspective view of the adjustment leg concerning the embodiment. The front view at the time of seeing the projector concerning the embodiment from the front. The perspective view of the adjustment leg which concerns on the modification of this invention. The perspective view of the adjustment leg which concerns on the other modification of this invention. The perspective view which shows the external appearance of the conventional projector. Explanatory drawing for demonstrating the image | video displayed by projecting light. The front view at the time of seeing the conventional projector from the front.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
The projector 1 according to this embodiment is a projection-type image display device that projects and displays an image by projecting light. Hereinafter, the light of the image projected from the projector 1 to display the image is referred to as image light.

  As shown in FIG. 1, the projector 1 includes a housing 2 that houses optical components and the like for projecting image light, a projection lens 3 provided at the front end of the housing 2, A shaft support portion 4 provided at both ends in the lateral direction and two adjustment legs 5 protruding downward, which is the outside of the housing 2, are provided.

  The horizontal direction is a direction that becomes a horizontal direction when the projector 1 is installed on a horizontal plane. The front-rear direction includes the direction of light projected by the projection lens 3 (that is, the direction of the optical axis) and is a direction perpendicular to the lateral direction. In the present embodiment, the direction in which the image light is projected from the housing 2 is the front in the front-rear direction.

  The housing 2 is a case supported by the adjustment legs 5. In the present embodiment, the housing 2 is supported by the two adjustment legs 5 on the front side of the housing 2, and the rear side of the housing 2 is directly provided on the installation surface. On the front side of the housing 2, two shaft support portions 4 for supporting the adjustment legs 5 are provided at a predetermined interval in the lateral direction.

  As shown in FIG. 2, the projection lens 3 is an optical component that projects image light from the front end of the housing 2 toward the front of the housing 2. By projecting image light by the projection lens 3, an image is displayed on a plane such as a screen or a wall.

  As shown in FIG. 3, the shaft support 4 is a member for supporting the adjustment leg 5, and the shaft support 4 is formed with an insertion hole 41 through which a part of the adjustment leg 5 is inserted. The insertion hole 41 is provided with a threaded portion 41a because a spiral groove is formed. The adjustment leg 5 is attached to the shaft support part 4 by screwing a part of the adjustment leg 5 into the female thread part 41a. Note that the shaft support 4 may be configured as a member different from the housing 2 or may be provided as a part of the housing 2.

  The adjustment leg 5 is a support leg that supports the housing 2 and extends so as to protrude from the housing 2 toward an installation surface on which the projector 1 is installed. The adjustment legs 5 respectively regulate the grounding part 51 in contact with the installation surface on which the projector 1 is installed, the rotating shaft 52 provided connected to the grounding part 51, and the outward movement of the housing 2. The movement restricting portion 53 is provided.

  The substantially cylindrical grounding portion 51 has a tip 51a that has a round shape or a spherical shape or a parabolic shape in cross section, and an outer peripheral surface 51b that faces in the radial direction. The diameter R1 of the grounding portion 51 is larger than the diameter R2 of the rotating shaft 52. The radial direction is a direction perpendicular to the axis that is the rotation center of the rotation shaft 52 (that is, the rotation center of the adjustment leg 5).

  The rotating shaft 52 is a part of the adjusting leg 5 inserted through the insertion hole 41, and the rotating shaft 52 is provided with a male screw portion 52 a in which a spiral groove is formed. The male screw portion 52a is screwed into the female screw portion 41a of the shaft support portion 4, and the screwing amount of the female screw portion 41a and the male screw portion 52a changes as the rotating shaft 52 rotates. Therefore, by rotating the rotating shaft 52 and rotating the adjusting leg 5, the adjusting leg 5 moves in the axial direction, and thus the length L of the adjusting leg 5 protruding from the housing 2 can be adjusted. The axial direction is a direction parallel to the axis that is the rotation center of the rotation shaft 52.

  The movement restricting portion 53 is connected to the rotating shaft 52 on the opposite side of the grounding portion 51 with respect to the shaft support portion 4. The diameter R3 of the movement restricting portion 53 is larger than the diameter R2 of the rotating shaft 52. Therefore, when the movement restricting portion 53 and the shaft support portion 4 come into contact with each other, the rotation of the rotating shaft 52 is prevented and the movement of the adjusting leg 5 to the outside of the housing 2 is restricted. With such a configuration, the adjustment leg 5 is prevented from coming off from the shaft support 4.

  By rotating each of the adjustment legs 5, the length L of the adjustment legs 5 protruding from the housing 2 can be adjusted independently. Therefore, even when the projector 1 is installed on a tilted surface that is not horizontal, the length L that the adjustment leg 5 protrudes from the housing 2 is adjusted so that the image is displayed horizontally. Is possible.

  The two adjusting legs 5 are provided at positions where the video is displayed horizontally when the lengths L of the two adjusting legs 5 protruding from the housing 2 are the same. That is, two adjustment legs 5 are provided at a predetermined interval in the lateral direction, which is a direction perpendicular to the center line (that is, the optical axis) of the light projected by the projection lens 3.

  The direction of the light projected by the horizontal plane and the projection lens 3 (that is, the direction parallel to the optical axis) by rotating the adjustment leg 5 provided on the front side of the housing 2 (that is, the side on which the image light is projected). The elevation angle θ (see FIGS. 1 and 2), which is the angle between Specifically, the elevation angle θ can be increased by increasing the length L of each of the two adjustment legs 5 protruding from the casing 2, and the two adjustment legs 5 protrude from the casing 2. The elevation angle θ can be reduced by shortening each length L.

  Here, in this embodiment, as shown in FIG. 4 and the like, each adjustment leg 5 corresponds to each length L that the adjustment leg 5 protrudes from the housing 2 so that an image is displayed horizontally. A feature is that a mark 60 is provided.

  More specifically, the mark 60 is a mark for aligning the lengths L of the adjustment legs 5 protruding from the housing 2 with the lengths when the image is displayed horizontally. It is a part of the portion 51 and is provided on the outer peripheral surface 51b. The mark 60 provided on the adjustment leg 5 rotates around the axis serving as the rotation center of the adjustment leg 5 as the adjustment leg 5 rotates. Therefore, the direction in which the mark 60 faces from the center of rotation of the adjustment leg 5 changes with the rotation of the adjustment leg 5 when adjusting the length L of the adjustment leg 5 protruding from the housing 2. When the length L which the two adjustment legs 5 protrude from the housing | casing 2 is respectively the same, the mark 60 provided in each of the adjustment legs 5 is comprised so that it may face the same direction.

  That is, the configuration of the spiral groove of the female screw portion 41a is the same in each of the two shaft support portions 4, and the spiral groove of the male screw portion 52a is the same in each of the two adjustment legs 5. The configuration is the same. Then, as shown in FIG. 5, the mark 60 provided on each of the adjustment legs 5 is located at a position facing the same direction when the lengths L of the two adjustment legs 5 projecting from the housing 2 are the same. Is provided. That is, if there is no difference between the length L1 from which one adjustment leg 5 protrudes from the housing 2 and the length L2 from which the other adjustment leg 5 protrudes from the housing 2, the mark 60 is seen from the radial direction. Each of the adjustment legs 5 provided is configured to have the same appearance. In FIG. 5, the mark 60 is directed forward, but since the two shaft support portions 4 and the adjustment legs 5 have the same configuration, the length by which the two adjustment legs 5 protrude from the housing 2 is shown. As long as L is the same, the mark 60 faces in the same direction from the center of rotation of the adjusting leg 5 on which the mark 60 is provided.

  In the present embodiment, the mark 60 is one protrusion 61 formed by projecting the outer peripheral surface 51b in the radial direction, and the protrusion 61 is provided to extend in the axial direction on the outer peripheral surface 51b. Except for the protrusion 61, the outer peripheral surface 51b of the ground contact portion 51 is not provided with a radially protruding portion or a radially recessed portion.

Next, a procedure for adjusting the length L of the adjustment leg 5 protruding from the housing 2 so that the image is displayed horizontally when the projector 1 is installed on a horizontal plane will be described.
First, a person who intends to install the projector 1 adjusts the elevation angle θ by adjusting the lengths L of the adjustment legs 5 protruding from the housing 2. At this time, each length L from which the adjusting leg 5 protrudes from the housing 2 is adjusted so that the length L is substantially the same by visually recognizing the length L.

  Next, at least one of the adjustment legs 5 is rotated to finely adjust the length L of the adjustment legs 5 protruding from the housing 2. That is, referring to the mark 60 provided on the adjustment leg 5, the adjustment leg 5 is rotated so that the mark 60 faces in the same direction, whereby the length L of the adjustment leg 5 protruding from the housing 2 is set. The adjustment legs 5 are adjusted to be the same, and the lengths L of the adjustment legs 5 protruding from the housing 2 are aligned so that the image is displayed horizontally. In this way, the projectors 1 having the same length L that the adjustment legs 5 protrude from the housing 2 are installed on the horizontal plane, so that they are projected by the projector 1 as shown by the solid squares in FIG. The image is displayed horizontally.

According to this embodiment, the following effects can be obtained.
(1) Each of the adjustment legs 5 is provided with a mark 60 for making the lengths of the adjustment legs 5 protruding from the housing 2 correspond to each other so that the image is displayed horizontally. For this reason, a person who intends to install the projector 1 refers to the mark 60 provided on each of the adjustment legs 5 so that the adjustment legs 5 protrude from the housing 2 so that the image is displayed horizontally. The length L can be adjusted. Accordingly, the length L of the adjustment leg 5 protruding from the housing 2 can be adjusted so that the image is displayed horizontally without referring to the actually displayed image. The projector 1 can be easily installed so as to be displayed.

  (2) When the lengths L from which the two adjustment legs 5 protrude from the housing 2 are the same, the marks 60 provided on each of the adjustment legs 5 face the same direction. For this reason, those who rotate the adjusting legs 5 refer to the orientations of the marks 60 provided on each of the adjusting legs 5, and the lengths L at which the plurality of adjusting legs 5 protrude from the housing 2 are the same. As described above, the length L of the adjustment leg 5 protruding from the housing 2 can be adjusted.

  (3) The adjustment leg 5 includes a rotating shaft 52 provided with a male screw portion 52 a and a grounding portion 51 as a large diameter portion having a diameter larger than that of the rotating shaft 52. It is a part of the outer peripheral surface 51b that faces in the radial direction. For this reason, compared with the case where the mark 60 is provided on the rotating shaft 52, for example, the direction in which the mark 60 faces can be easily understood.

  (4) Since the mark 60 is one protrusion 61 formed so as to protrude in the radial direction, a person who intends to install the projector 1 determines the position of the mark 60 by tactile sense when rotating the adjustment leg 5. I can know.

  (5) When a person who intends to install the projector 1 rotates the adjustment leg 5, the protrusion 61, which is the mark 60 provided on the grounding portion 51, can be engaged with the fingertip, and the adjustment leg 5 can be easily operated. Can be rotated.

  In addition, this invention is not limited to the said embodiment, A various design change is possible based on the meaning of this invention, and they are not excluded from the scope of the present invention. For example, the above embodiment may be modified as follows, or the following modifications may be combined.

  In the above embodiment, the mark 60 is one protrusion 61 formed by protruding the outer peripheral surface 51b in the radial direction. However, as shown in FIG. 6, the mark 60 has the outer peripheral surface 51b in the radial direction. It may be one groove 62 formed by being recessed.

  Specifically, the groove 62 shown in FIG. 6 is a mark 60 that extends in the axial direction on the outer peripheral surface 51b. Except for the groove 62, the outer peripheral surface 51 b of the ground contact portion 51 is not provided with a dent in the radial direction or a protrusion that protrudes in the radial direction. Even if it is such a structure, the effect according to said (4) and (5) can be obtained.

  In addition, instead of forming the mark 60 by the protrusion 61 and the groove 62, a part of the colored outer peripheral surface 51b may be formed as the mark 60 as shown in FIG. In this case, the mark 60 is configured by a color different from the surrounding color of the mark 60. According to such a configuration, the mark 60 can be made conspicuous by color.

  The marks 60 such as the protrusions 61 and the grooves 62 may be configured with a color different from the surrounding color. According to such a configuration, the marks 60 such as the protrusions 61 and the grooves 62 can be made conspicuous by color.

  If the adjustment leg 5 is a mark that corresponds to each length L protruding from the housing 2 so that the image is displayed horizontally, the shape and arrangement of the marks 60 such as the protrusions 61 and the grooves 62 You may change a formation aspect suitably.

  If the adjustment leg 5 is a mark that corresponds to each length L protruding from the housing 2 so that the image is displayed horizontally, a protrusion or groove other than the mark 60 (both not shown) You may provide in the surface 51b. Specifically, for example, protrusions (not shown) having shapes different from the marks 60 of the protrusions 61 may be provided on the outer peripheral surface 51b at equal intervals. Further, for example, grooves (not shown) having a shape different from the mark 60 of the groove 62 may be provided on the outer peripheral surface 51b at equal intervals.

  When a plurality of protrusions (not shown) that include the protrusions 61 and have the same configuration as the protrusions 61 are provided at equal intervals on the outer peripheral surface 51b in the circumferential direction, the protrusions are removed from the mark 60. . Similarly, when a plurality of grooves (not shown) including the grooves 62 and having the same configuration as the grooves 62 are provided at equal intervals on the outer peripheral surface 51b in the circumferential direction, the grooves are marked 60. Excluded from.

  In the above embodiment, the lengths L of the adjustment legs 5 projecting from the housing 2 are aligned so that the image is displayed horizontally. The present invention can also be applied to a projector (not shown) that displays images horizontally when they are not the same.

  In the above embodiment, the projector 1 is provided with two adjustment legs 5, but the number of adjustment legs 5 is not limited to two, and is a projector (not shown) including two or more adjustment legs. Also, the present invention can be applied. For example, the projector may include four adjustment legs by providing two adjustment legs on the front side of the casing and providing two adjustment legs on the rear side of the casing. When installing such a projector on a horizontal plane, the length of the two adjustment legs on the front side is aligned with the length of the two adjustment legs on the rear side and the length of protrusion of the two adjustment legs on the rear side is aligned. Can be configured to be displayed horizontally.

  DESCRIPTION OF SYMBOLS 1 ... Projector (projection type image display apparatus), 2 ... Housing | casing, 3 ... Projection lens, 4 ... Shaft support part, 5 ... Support leg, 41 ... Insertion hole, 41a ... Female thread part, 51 ... Grounding part (large diameter part) ), 51a ... tip, 51b ... outer peripheral surface, 52 ... rotating shaft, 52a ... male screw part, 53 ... movement restricting part, 60 ... mark, 61 ... projection, 62 ... groove.

Claims (7)

An optical component that projects light for displaying an image, a housing that houses the optical component, and a plurality of adjustment legs that protrude from the housing and support the housing, and rotate the adjustment legs A projection-type image display device in which the length of the adjustment leg protruding from the housing can be adjusted,
Each of the adjustment legs is provided with a mark for allowing the adjustment legs to correspond to the lengths of the adjustment legs protruding from the casing so that the image is displayed horizontally. Video display device.   2. The projection type according to claim 1, wherein when the plurality of adjustment legs protrude from the housing have the same length, the marks provided on each of the adjustment legs are directed in the same direction. Video display device. The adjustment leg includes a rotating shaft provided with a male screw portion, and a large-diameter portion having a larger diameter than the rotating shaft,
The projection display apparatus according to claim 1, wherein the mark is a part of the large-diameter portion and is provided on an outer peripheral surface facing a radial direction.   The said light for displaying the said image | video is projected ahead from the said housing | casing, The said two adjustment legs are provided in the front side of the said housing | casing, The Claim 1 thru | or 3 characterized by the above-mentioned. The projection display apparatus according to one item.   5. The projection display apparatus according to claim 1, wherein the mark is one protrusion formed so as to protrude in a radial direction. 6.   The projection image display apparatus according to claim 1, wherein the mark is one groove formed to be recessed in a radial direction.   The projection image display apparatus according to any one of claims 1 to 6, wherein the mark is configured by a color different from a color around the mark.

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