JP2004343505A - Remote control light receiver - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To obtain a remote control light receiver in which the turning range of a holding member of a remote control photodetector can be set large to some extent without damaging designability. <P>SOLUTION: The remote control light receiver receives a remote controlled light from a predetermined remote control device and is provided with a housing 3 having a light receiving window 3a, a covering member 5 for a window disposed at the light receiving window 3a of the housing 3 to transmit the remote controlled light, the holding member 11 for holding a photodetector 7 for receiving the remote controlled light and disposed in the housing in a freely turnable way while facing the light receiving window 3a of the housing 3, an operating member 13 disposed outside the housing 3, and a turning mechanism 15 disposed in the housing 3 for applying change-direction to the light receiving direction P of the photodetector 7 by turning the holding member 11 by an operation of the operating member 13. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a remote control light receiving device that receives remote control light from a remote control device used in an image projection device such as a liquid crystal projector device.
[0002]
[Prior art]
Generally, the remote control light receiving element of the remote control light receiving device has a light receiving characteristic in which the light receiving sensitivity is highest on the central axis and the light receiving sensitivity decreases as the distance from the central axis decreases, so that the light receiving range is not so wide. Therefore, the light receiving range of the conventional remote control light receiving device is not too wide. For this reason, the conventional remote control light receiving device has a disadvantage that a necessary light receiving range cannot be secured depending on the installation location.
[0003]
As a solution to this drawback, a light-receiving unit provided with a remote control light-receiving element is rotatably disposed in the housing so as to protrude outward from a light-receiving window on the outer surface of the housing, and receives light from outside with a finger. A remote control light receiving device (first prior art) has been proposed in which a light receiving direction of a light receiving unit can be changed by rotating a unit to secure a necessary light receiving range according to an installation location. (Patent Document 1).
[0004]
On the other hand, infrared rays are generally used as remote control light. Infrared rays are included in all ordinary light, and are also included in illumination light having a certain pulse such as a fluorescent lamp. Therefore, when illumination light such as a fluorescent lamp is received by the remote control light receiving device, there is a disadvantage that the remote control light receiving device may malfunction due to being confused with the remote control light.
[0005]
As a solution to this drawback, there has been proposed a remote control light receiving device (second prior art) in which a light shielding member is provided so that illumination light such as a fluorescent lamp is shielded by the light shielding member (Patent Documents 2 and 3). ).
[0006]
[Patent Document 1]
JP-A-6-261004 (FIG. 2)
[Patent Document 2]
JP 2001-294075 A (FIG. 9)
[Patent Document 3]
JP-A-2002-190617 (FIG. 3)
[0007]
[Problems to be solved by the invention]
In the first related art, the rotation range of the light receiving unit needs to be set to a certain extent so that the light receiving direction of the light receiving unit can be changed to an appropriate direction depending on the installation location ( That is, it is necessary to form the light receiving window of the housing to a certain extent. However, when the light-receiving window of the housing is formed large, there is a disadvantage that the interior of the housing is exposed from a gap between the light-receiving window and the light-receiving portion, thereby deteriorating the design.
[0008]
On the other hand, in the second prior art, since the installation angle of the light blocking member cannot be adjusted, depending on the installation location of the remote control light receiving device, the remote control light receiving device malfunctions due to the illumination light because the illumination light cannot be appropriately shielded, There is a disadvantage that the remote control light is blocked by the light blocking member and the remote control light is not received by the remote control light receiving device.
[0009]
SUMMARY OF THE INVENTION The present invention has been made to solve the above-described problems, and a first object is to provide a holding member (a member corresponding to the above-described light receiving unit) for holding a remote control light receiving element without deteriorating design. To obtain a remote control light-receiving device capable of setting a large rotation range of the remote control.
[0010]
The second object is to change the installation angle of the light shielding member with the rotation of the holding member, so that the holding member is rotated according to the installation location, and the light receiving direction of the light receiving element is changed. Even in this case, the present invention provides a remote control light-receiving device that can shield illumination light such as a fluorescent light without appropriately hindering reception of remote control light by a light shielding member.
[0011]
[Means for Solving the Problems]
In order to solve the above problem, an invention according to claim 1 is a remote control light receiving device for receiving remote control light from a predetermined remote control device, wherein the housing has a light receiving window, and the light receiving of the housing is provided. A window cover member disposed on a window and transmitting the remote control light, and a light receiving element for receiving the remote control light are held, and the light receiving element is turned into the housing so as to face the light receiving window of the housing. A holding member movably disposed, an operation member disposed outside the housing, and a rotation member disposed in the housing and rotating the holding member in accordance with an operation of the operation member. A turning mechanism for changing the light receiving direction of the light receiving element.
[0012]
BEST MODE FOR CARRYING OUT THE INVENTION
<Embodiment 1>
The remote control light receiving device 1 of this embodiment receives remote control light (for example, infrared light) from a predetermined remote control device (for example, a remote control device used in an image projection device such as a liquid crystal projector device). As shown in FIG. 2, a housing 3 having a light receiving window 3a, a window cover member 5 disposed in the light receiving window 3a of the housing 3 and transmitting the remote control light, and a light receiving element 7 for receiving the remote control light are held. A holding member 11 rotatably supported by a support member 9 in the housing 3 so that the light receiving element 7 faces the light receiving window 3 a of the housing 3, and rotates outside the housing 3. The light receiving direction P of the light receiving element 7 is changed by rotating the holding member 11 in accordance with the rotation (operation) of the handle (operating member) 13 freely disposed and the handle 13 disposed in the housing 3. Rotating mechanism 15 for changing direction and holding It is disposed timber 11 and a shielding member 17 for limiting the receiving range of the light receiving element 7.
[0013]
The housing 3 is formed of, for example, a rectangular parallelepiped box by a light-shielding member. A light receiving window 3a is formed on the outer surface of the housing 3 (for example, on a surface portion of an appropriate size extending from one side surface (the left side surface in FIG. 1) to the upper surface). On the back surface of the edge portion (for example, upper edge portion) of the light receiving window 3a, a projection 3b that is engaged with a later-described locking claw 5b of the window cover member 5 is formed in a convex shape. On the back surface of the edge of the light receiving window 3a (for example, the left and right side edges), the window cover member protrudes inward of the light receiving window 3a so that the window cover member 5 does not fall into the housing 3. An overhanging portion 3c that supports the edge of the back surface of No. 5 is formed. On the lower surface of the housing 3, feet 3d for placing on a low place such as a table 51 are arranged as shown in FIG. 2, and a ceiling for hanging from a ceiling 53 as shown in FIG. The suspending member 3e is provided so as to be attachable / detachable with screws or double-sided tape.
[0014]
The window cover member 5 is formed in a shape conforming to the shape of the light receiving window 3a (here, in a flat plate shape, the upper portion of which is bent toward the back surface) by a transmissive member that transmits at least the remote control light. On the back surface of the edge (the upper edge in this case) of the window cover member 5, a locking claw 5b to be engaged with the projection 3b of the light receiving window 3a is formed. On the back surface of the edge portion (here, the lower edge portion) of the window cover member 5, a locking piece 5c that is engaged with the back surface of the edge portion of the light receiving window 3a is formed.
[0015]
The window cover member 5 is disposed on the light receiving window 3a of the housing 3 in the following procedure. First, the locking piece 5c at the lower edge of the window cover member 5 is engaged with the back surface of the lower edge of the light receiving window 3a from outside. Then, the locking claw 5b on the upper edge of the window cover member 5 is engaged with the projection 3b on the upper edge of the light receiving window 3a from outside. Along with this, the window cover member 5 is fitted into the light receiving window 3a such that the edge of the back surface of the window cover member 5 is supported by the overhang 3c of the light receiving window 3a. In this way, the window cover member 5 is disposed on the light receiving window 3 a of the housing 3.
[0016]
The holding member 11 is formed, for example, in a box shape with a front opening (left side opening in FIG. 1) and is rotatably supported by a supporting member 9 on its outer surface (here, the center of the rear surface (right side in FIG. 1)). The supporting portion 11a is provided to be formed. Inside the holding member 11, a substrate 23 on which the light receiving element 7 for receiving the remote control light is mounted is housed and arranged such that the light receiving element 7 faces the open front surface of the holding member 11. On the open front surface of the holding member 11, light incident on the light receiving element 7 from a direction within a vertical angular range (an angular range not excessively deviating from the central axis P) θ including the central axis P of the light receiving element 7 is passed, The light blocking member 17 is provided so as to block light incident on the light receiving element 7 from a direction within an angular range α (β) deviating upward (downward) from the angular range θ.
[0017]
The light-shielding member 17 has a plate-shaped light-shielding member main body that closes the open front surface of the holding member 11, and includes a central axis P of the light-receiving element 7 at a position directly in front of the light-receiving element 7 in the light-shielding member main body. An opening 17a for passing only incident light from a direction within the angular range θ is provided and formed. At the edge of the light blocking member 17, a locking claw 17b is provided to be engaged with a locking hole 11b formed on the peripheral side surface of the holding member 11. The locking claws 17b engage with the locking holes 11b of the holding member 11, so that the light blocking member 17 is fixedly disposed on the open front surface of the holding member 11.
[0018]
The rotation mechanism 15 is configured as, for example, a worm gear mechanism. That is, the rotating mechanism 15 has one end protruding outward from the hole 3 f of the housing 3 and the handle 13 connected to one end thereof, and the other end of the rotating shaft 15 a A worm (first gear) 15b is provided, and a worm wheel (second gear) 15c is provided on the holding member 11 so as to mesh with the worm 15b. The worm wheel 15c is disposed on the holding member 11 such that its rotation axis coincides with the rotation axis of the holding member 11 (here, the worm wheel 15c is integrated with the supported portion 11a of the holding member 11). Formed and disposed on the holding member 11).
[0019]
With this configuration, when the handle 13 is rotated by a finger, the rotation of the handle 13 rotates the rotation shaft portion 15a to rotate the worm 15b, and the rotation of the worm 15b rotates the worm wheel 15c to rotate the holding member 11 The light receiving direction P of the light receiving element 7 is changed by the rotation of the holding member 11, and the light shielding member 17 is rotated to change the installation angle of the light shielding member 17. That is, when the handle 13 is rotated, incident light from a direction within the angular range θ including the central axis P of the light receiving element 7 is deviated upward (downward) from the angular range θ without being blocked by the light blocking member 17. The light receiving direction P of the light receiving element 7 is changed so that only the incident light from the direction within the angle range α (β) is blocked.
[0020]
The supporting member 9 supports (1) the holding member 11 rotatably at the supported portion 11a of the holding member 11, and (2) the worm wheel 15c and the rotating shaft portion 15a disposed on the holding member 11. The worm 15b is rotatably supported so that the worm 15b and the worm 15b are engaged with each other. The worm 15b is disposed on the bottom surface of the housing 3 with screws, for example.
[0021]
More specifically, in the above configuration (1), for example, the rotating shaft 11c is disposed on the supported portion 11a of the holding member 11, and the rotating shaft 11c is rotatably supported by the support member 9. Thus, the holding member 11 is rotatably supported by the support member 9. The support member 9 is formed with, for example, an L-shaped rotation restricting portion 9c. The holding member 11 is rotated downward so that the center axis P of the light receiving element 7 is moved in a predetermined direction (for example, on the light receiving window 3a side). (Right side direction of the support member 9), the lower half of the rear surface of the holding member 11 abuts against the rotation restricting portion 9c of the support member 9, and the rotation restricting portion 9c restrains the lower rotation of the holding member 11. .
[0022]
In the above configuration (2), the support member 9 is provided with a pair of upper and lower shaft supports 9b having shaft through holes 9a, and the worms 15b are arranged between the shaft supports 9b. The rotation shaft 15a is rotatably supported by the support member 9 by passing the rotation shaft 15a through the shaft through hole 9a. In this configuration, the rotating shaft portion 15a is axially inserted through the shaft through hole 9a of each shaft supporting portion 9b, so that the rotating shaft portion 15a is positioned and supported in front, rear, left and right. Then, the worm 15b is disposed between the shaft support portions 9b, and the worm 15b is positioned in the vertical direction, whereby the rotary shaft portion 15a is positioned and supported in the vertical direction.
[0023]
Next, the setting of the light receiving direction P of the remote control light according to the installation location of the remote control light receiving device 1 will be described.
[0024]
When installing the remote control light receiving device 1 in a low place (for example, on the table 51), as shown in FIG. 2, the remote control light receiving device 1 is placed on the table 51 with its feet 3d downward. Then, the handle 13 of the remote control light receiving device 1 is rotated to adjust the light receiving direction P of the light receiving element 7 to, for example, the lateral direction. As a result, the remote control light from the direction within the vertical angle range θ including the horizontal direction is appropriately received by the light receiving element 7 of the remote control light receiving device 1, and the remote control light within the angular range α deviated from the angle range θ. Illumination light such as fluorescent light from the direction is blocked by the light blocking member 17 of the remote control light receiving device 1 and is not received. As a result, a necessary lateral light receiving range is secured so that malfunction due to reception of illumination light such as a fluorescent lamp is prevented.
[0025]
On the other hand, when the remote control light receiving device 1 is installed at a high place (for example, the ceiling 53), as shown in FIG. 3, the remote control light receiving device 1 is turned upside down and the ceiling hanging member 3e is used so as to be in a horizontal posture. Hang it from the ceiling 53. Then, the handle 13 of the remote control light receiving device 1 is rotated to adjust the light receiving direction P of the light receiving element 7 to, for example, an obliquely downward direction. As a result, the remote control light from the direction within the vertical angle range θ including the obliquely downward direction is appropriately received by the light receiving element 7 of the remote control light receiving device 1, and the remote control light within the angular range β deviated above the angular range θ. Illumination light such as a fluorescent lamp from the direction is blocked by the light blocking member 17 of the remote control light receiving device 1 and is not received. As a result, a necessary light receiving range in the obliquely downward direction is secured so that malfunction due to reception of the illumination light is prevented.
[0026]
According to the remote control light receiving device 1 configured as described above, since the window cover member 5 is disposed on the light receiving window 3 a of the housing 3, the light receiving window is set so that the rotation range of the holding member 11 is set large. Even if the 3a is formed large, it is possible to prevent the inside of the housing 3 from being exposed from the light receiving window 3a, and thereby it is possible to set a large rotation range of the holding member 11 of the remote control light receiving element 7 without deteriorating the design.
[0027]
A handle 13 is provided outside the housing 3, and a rotatable holding member 11 and a rotation mechanism 15 are provided inside the housing 3, and the rotation (operation) of the handle 13 is performed by the rotation mechanism 15. ), The light receiving direction P of the light receiving element 7 is changed by turning the holding member 11, so that even if the window cover member 5 is disposed on the light receiving window 3a, the rotation of the handle 13 causes the same as the conventional case. In addition, the holding member 11 can be rotated from the outside, and the light receiving direction P of the light receiving element 7 can be changed.
[0028]
In addition, since the holding member 11 is disposed so as to be rotatable up and down so as to be able to change the light receiving direction P of the light receiving element 7 up and down, the light receiving direction of the light receiving element 7 depends on the height of the installation location. The direction of P can be changed up and down, so that the required light receiving range can be ensured even when the remote control light receiving device 1 is installed at a high place such as a ceiling or at a low place such as a tabletop.
[0029]
The rotating mechanism 15 includes a rotating shaft 15a connected to the handle 13, a worm 15b provided on the rotating shaft 15a, and a worm provided on the holding member 11 and rotated by the rotation of the worm 15b. The holding member 11 is rotated by rotating the worm wheel 15c by the rotation of the worm 15b accompanying the rotation of the handle 13 so that the holding member 11 is rotated from the outside by the rotation of the handle 13 by a simple mechanism. Can rotate.
[0030]
Further, since the light shielding member 17 is provided on the holding member 11, the light shielding member 17 can be rotated with the rotation of the holding member 11 (that is, the installation angle of the light shielding member 17 can be changed). Therefore, even when the holding member 11 is rotated in response to the change of the light receiving direction P of the light receiving element 7, the light shielding member 17 can appropriately shield the illumination light such as the fluorescent lamp without hindering the reception of the remote control light.
[0031]
<Embodiment 2>
In the first embodiment, the rotating mechanism 15 is configured as a worm gear mechanism, but is not limited to the worm gear mechanism. For example, the rotating mechanism 15 may be configured as a bevel gear mechanism. In this case, the same effect as in the case of the worm gear mechanism can be obtained.
[0032]
<Embodiment 3>
In the first embodiment, the rotating mechanism 15 is configured using the gears 15b and 15c. However, when the rotating mechanism 15 is configured without using the gear, the rotating mechanism 15 may be replaced with the rotating shaft 11c instead of the above-described configuration. Is extended so that one end of the rotating shaft 11c protrudes outward from a predetermined hole of the housing 3 to connect the handle 13 to one end of the rotating shaft 11c. What is necessary is just to comprise so that the holding member 11 may be rotated by rotating. With this configuration, the rotation mechanism 15 can be configured with a simpler configuration.
[0033]
<Embodiment 4>
In the first embodiment, the holding member 11 is configured to rotate only vertically. However, when the holding member 11 is further configured to rotate left and right, (1) the holding member 11 is further supported. What is necessary is just to have the member 9 rotatably supported in the left and right direction and to have (2) a handle and a rotation mechanism for the left and right rotation. In this case, for example, as a method of supporting the above (1), the support member 9 may be disposed on the bottom surface of the housing 3 so as to be rotatable around the center vertical line of the support member 9. As the rotation mechanism of the above (2), a rotation shaft for left and right rotation is disposed on the support member 9 so as to be positioned on the center vertical line of the support member 9, and one end of this rotation shaft is provided. May be projected from a predetermined hole in the bottom surface of the housing 3 to connect the handle to one end thereof. With these configurations (1) and (2), the rotation shaft for left and right rotation is rotated by the rotation of the handle for left and right rotation, and the rotation of the rotation shaft causes the support member 9 to move vertically to the center of the support member 9. The support member 9 is rotated left and right by the rotation of the support member 9 right and left.
[0034]
【The invention's effect】
According to the first aspect of the present invention, since the window cover member is provided in the light receiving window of the housing, even if the light receiving window is formed large in order to set a large rotation range of the holding member, the light receiving light is received. It is possible to prevent the inside of the housing from being exposed from the window, whereby the rotation range of the holding member of the remote control light receiving element can be set large without impairing the design.
[0035]
An operating member is provided outside the housing, and a rotatable holding member and a rotating mechanism are provided inside the housing, and the holding member is rotated by the rotating mechanism in accordance with the operation of the operating member. As a result, the light receiving direction of the light receiving element is changed, so that even if the window cover member is provided in the light receiving window, the holding member can be rotated from the outside by operating the operating member as in the conventional case, and the light receiving element receives the light. The direction can be changed.
[Brief description of the drawings]
FIG. 1 is a schematic cross-sectional configuration diagram of a remote control light-receiving device according to a first embodiment of the present invention.
FIG. 2 is a diagram illustrating a case where the remote control light-receiving device according to the first embodiment of the present invention is installed on a desk.
FIG. 3 is a diagram illustrating a case where the remote control light-receiving device according to Embodiment 1 of the present invention is installed on a ceiling.
[Explanation of symbols]
REFERENCE SIGNS LIST 1 remote control light receiving device, 3 housing, 3 a light receiving window, 5 window cover member, 7 light receiving element, 9 support member, 11 holding member, 13 handle, 15 rotating mechanism, 15 a rotating shaft portion, 15 b worm, 15 c worm wheel , 17 light blocking member, 51 tabletop, 53 ceiling.

Claims (4)

A remote control light receiving device that receives remote control light from a predetermined remote control device,
A housing having a light receiving window,
A window cover member disposed on the light receiving window of the housing and transmitting the remote control light,
A holding member that holds a light receiving element that receives the remote control light and is rotatably disposed in the housing so that the light receiving element faces the light receiving window of the housing,
An operation member disposed outside the housing,
A rotation mechanism disposed in the housing and configured to change the light receiving direction of the light receiving element by rotating the holding member in accordance with an operation of the operation member;
A remote control light-receiving device comprising: 2. The remote control light receiving device according to claim 1, wherein the holding member is rotatably disposed up and down so as to be able to change the light receiving direction of the light receiving element up and down. 3. A rotating shaft connected to the operating member, a first gear disposed on the rotating shaft, and a rotating mechanism disposed on the holding member and rotated by rotation of the first gear; 3. The apparatus according to claim 1, further comprising a second gear, wherein the holding member is rotated by rotating the second gear by rotation of the first gear in response to operation of the operation member. A remote control light-receiving device according to item 1. The remote control light-receiving device according to any one of claims 1 to 3, wherein a light-blocking member that limits a light-receiving range of the light-receiving element is provided on the holding member.

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