JP3106189U - Structure of remote control receiver - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a structure of a remote control light receiving section which can reduce an opening provided in an electric equipment housing for transmitting a signal light from a remote control apparatus and can reduce design restrictions.
The remote control light receiving unit is provided at a predetermined position inside a housing of an electric device having an opening and receives a signal light from a remote control device through the opening. A rib extending substantially vertically inside the housing from the portion and having reflecting means on the inner wall is provided.

Description

  The present invention relates to remote control-operable electric devices such as various AV devices, lighting devices, and air / temperature control devices, and more particularly to the structure of a remote control light receiving unit disposed in a main body.

  2. Description of the Related Art Conventionally, various AV devices, lighting devices, air / temperature control devices, and the like have a remote control light receiving unit on the main body side in order to enable remote control using a remote control device.

  FIG. 4 is a schematic diagram showing a structure of a remote control light receiving unit of the television receiver. As shown in FIG. 4, the remote control light receiving unit of the television receiver includes a remote control light receiving element 10 that receives a signal light (for example, infrared light) transmitted from the remote control device on a light receiving surface 11 on a printed circuit board 30. Thus, infrared light can be received through an opening 21 provided in a cabinet 20 of the television receiver body.

  An operation switch or the like (not shown) is arranged near the opening 21 of the cabinet 20, and a nameplate (panel sheet) on which an operation switch display or the like is printed is provided at the portion where the opening 21 and the operation switch are arranged. 40 is stuck. The portion 50 corresponding to the opening 21 of the nameplate 40 is configured to be able to transmit infrared light, and is smoke-treated so that the inside cannot be visually recognized in design.

  Here, when the opening 21 provided in the cavit 20 is circular, the radius of the opening 21 is R, the distance from the cabinet 20 to the light receiving surface 11 is D, and the angle of incidence on the light receiving surface 11 is θ2. The radius of the portion 21 is designed so as to satisfy R ≧ D · tan θ2 (see FIG. 6). For example, as shown in FIG. 4, when D = 10 mm and θ2 = 35 °, R ≧ 7 mm should be satisfied. Thus, the size of the opening 21 is determined so that infrared light incident at a predetermined angle can be received.

  Further, as shown in FIG. 5, a separate member provided with a lens 60 is provided in the opening 21 and the incident infrared light is irregularly reflected by the lens 60, thereby receiving infrared light incident from a wider angle. There is also a remote control light receiving structure that can be used.

In addition, a technology has been proposed in which a remote control light receiving element is arranged so as to face the opening so that the viewing angle (the incident angle θ of infrared light) can be increased without increasing the aperture area (Patent Document 1). 1).
JP 2002-372251 A

  However, in the structure of the remote control light receiving section shown in FIG. 4, since the diameter of the opening 21 is 14 mm, the smoke printed on the nameplate is relatively large. For example, when a remote control light-receiving part is provided on the front of the cabinet of a television receiver, it is desirable that the design has a sense of unity without impairing the appearance of the television receiver. Therefore, it is difficult to unify them, and only the remote control light-receiving unit is unnecessarily conspicuous.

  In the structure of the remote control light receiving unit shown in FIG. 5, it is necessary to separately provide a lens member for irregularly reflecting the incident infrared light. Therefore, the cost of the apparatus is increased and a step of attaching the lens member is further required.

  Further, in the prior art, since the lens of the remote control light receiving element is housed in the signal taking-in portion (opening) provided in the outer shell of the housing, the printed circuit board on which the remote control light receiving element is mounted is mounted. The positional relationship with the outer shell of the housing is limited, and the remote control light-receiving element is likely to be visually recognized via the nameplate.

  SUMMARY OF THE INVENTION It is an object of the present invention to provide a structure of a remote control light receiving unit that can reduce the size of an opening provided in an electric device housing for transmitting signal light from a remote control device and reduce design restrictions.

  The present invention provides a remote control light-receiving element that is disposed at a predetermined position inside a housing of an electric device provided with an opening and receives signal light from a remote control device through the opening. In the remote control light-receiving section provided, a rib extending substantially vertically from the opening to the inside of the housing and having a reflection means on an inner wall is provided. Thus, the remote control light-receiving element can receive not only light directly incident from the opening but also light reflected by the inner wall of the rib.

  For example, the reflection means is formed by subjecting the inner wall of the rib to mirror polishing by polishing. Accordingly, incident light can be easily reflected without providing a reflector made of a material having a high reflectance such as stainless steel on the inner wall surface of the rib.

When the opening is circular, the rib is formed in a substantially cylindrical shape, and the radius of the opening is R, the length of the rib in the vertical direction is H, from the opening to the light receiving surface of the remote control light receiving element. Is D, the incident angle of the signal light incident from the opening with respect to the vertical direction of the opening is θ, the opening is:
R ≧ (D · tan θ) / 3
And the rib is
H ≧ 2D / 3
It was formed so that it might satisfy. Thus, the signal light incident at an angle θ with respect to the vertical direction of the opening can be reflected and reach the remote control light receiving element.

  Further, the rib is formed in a tapered shape so that the opening area becomes larger toward the inside of the housing than the opening. Thereby, even if the opening area is the same, the signal light from a wider angle can be received, and when the rib is formed using the mold, it can be easily removed from the mold after molding.

  Further, the structure of the remote control light receiving unit described above can be applied to various remote control operable electric devices such as various AV devices, lighting devices, and air / temperature control devices.

  According to the present invention, in a remote control light receiving unit provided in an electric device that can be operated by a remote controller, a rib that extends substantially vertically from the opening provided in the device housing to the inside of the housing and has a reflecting means on the inner wall is provided. With this configuration, when the signal light incident on the opening at a predetermined incident angle is designed to be able to be received, the opening area can be significantly reduced, and the design restrictions can be reduced. In other words, when the remote control light receiving unit is provided in the device housing, the area of the smoke printed at the position corresponding to the remote control light receiving unit on the nameplate is reduced, and this smoke impairs the uniformity of the external appearance of the entire device. Can be minimized, and an electric device with excellent design can be realized.

  Also, when an opening having the same opening area is provided in the device housing, the signal light entering the opening from a wider angle can be received as compared with the conventional remote control light receiving unit having no rib according to the present invention. Therefore, the range operable by the remote control device can be widened.

  Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings.

  FIG. 1 is an external view of a television receiver to which the structure of the remote control light receiving unit according to the present invention is applied, and FIG. 2 is a cross-sectional view showing the structure of the remote control light receiving unit 4 of the television receiver 1.

  In FIG. 1, a television receiver 1 has a video output unit 5 integrally formed with a cabinet 20, and an AV input / output terminal 2, an operation switch 3, and a remote control light receiving unit 4 provided below a front surface of a cab 20. I have.

  The remote control light receiving unit 4 includes a remote control light receiving element 10 for receiving a signal light (for example, infrared light) transmitted from a remote control device on a light receiving surface 11 on a printed circuit board 30, and a cabinet of the television receiver 1. It is arranged at a predetermined location so that infrared light can be received through an opening 21 provided in 20.

  A nameplate 40 on which the indication of each part is printed is attached to a portion where the AV input / output terminal 2, the operation switch 3, and the remote control light receiving section 4 are arranged. The nameplate 40 is entirely formed of, for example, an acrylic resin having substantially the same color (for example, gray) as the cabinet 20 of the television receiver 1, and has a design internal portion corresponding to the opening 21 of the remote control light-receiving unit 4. Is smoked (for example, black) so as to be invisible. For this reason, when the entire television receiver is gray, only the remote control light-receiving unit 4 is black, and it is desirable that this portion be designed as small as possible.

  In the present embodiment, as shown in FIG. 2, a point different from the conventional structure in that a cylindrical rib 22 extending substantially vertically from the circular opening 21 provided in the cabinet 20 to the inside of the cabinet is provided. . The reflection means is formed on the inner wall 22a of the rib 22 by performing mirror finishing by polishing. It is needless to say that the reflector may be constituted by a reflector made of a material having a high reflectivity such as stainless steel.

  By providing the rib 22 extending inward from the opening 21 in this way, the remote control light receiving element 10 can not only reflect the light directly incident from the opening but also the light reflected by the inner wall 22a of the rib. Light can be received. Therefore, when designing to be able to receive the signal light incident on the opening at a predetermined incident angle, the opening area can be remarkably reduced, so that the design restrictions can be reduced.

  Here, referring to FIG. 3, the dimensions of each part (member) in the remote control light receiving unit 4 will be described. FIG. 3 shows the radius of the opening 21 as R, the vertical length of the rib 22 (the length from the surface of the opening 21) as H, and the distance from the opening 21 to the light receiving surface 11 of the remote control light receiving element 10. D is a schematic diagram of the remote control light-receiving unit 4 when the incident angle of the infrared light L transmitted from the remote control device with respect to the vertical direction is θ.

  First, when it is desired to receive the infrared light L1 incident at an angle θ1 with respect to the vertical direction, the infrared light L1 enters through the end of the opening 21 and is reflected by the rib 22 in FIG. What is necessary is just to be incident on the light receiving surface 11. In FIG. 3, infrared light L enters through the opening 21 and can be directly received by the light receiving surface 11 up to the incident angle θ2.

At this time, from FIG.
D tan θ1 = 3R
Therefore, the radius R of the opening 21 is R ≧ (D · tan θ1) / 3 (1)
Is satisfied, the infrared light L1 can be reflected once by the inner wall 22a of the rib to reach the light receiving surface 11.

On the other hand, the infrared light L1 incident from the opening 21 reaches the light receiving surface 11 when reflected at a point of 2D / 3 from the surface of the opening 21 of the rib 22. Is H ≧ 2D / 3 (2)
Is satisfied, the infrared light can be reflected by the rib 22 and guided to the light receiving surface 11.

  For example, when infrared light incident at 35 ° with respect to the vertical direction of the opening 21 can be received, and the distance D from the opening 21 to the light receiving surface 11 of the remote control light receiving element 10 is 10 mm, Expression (2) Accordingly, the radius of the opening 21 is 2.33 mm or more, and the length of the rib 22 is 6.67 mm or more from Expression (3). Therefore, for example, if R = 3 mm and H = 7 mm, infrared light incident at an angle of at most 35 ° with respect to the vertical direction can be reliably received.

  Further, in the case where the opening area of the opening 21 provided in the device housing is the same, in the structure of the conventional remote control light receiving unit, it is limited to receive infrared light incident at an angle θ2, but in the present embodiment, Infrared light incident at an angle θ1 wider than θ2 can be received. That is, in FIG. 3, when the incident angle of the infrared light is 0 ≦ θ ≦ θ2 with respect to the vertical direction, the light reaches the light receiving surface 11 directly, and when θ2 <θ ≦ θ1 (for example, the infrared light L2), Is reflected by the inner wall 22a and reaches the light receiving surface 11. As described above, according to the remote control light receiving unit according to the present embodiment, the infrared light incident at a wider angle can be received, so that the range operable by the remote control device is significantly larger than that of the related art.

  In addition, since the infrared light L incident from the opening 21 reaches the light receiving surface 11 by one reflection, the intensity of the infrared light L is reduced by the reflection, and the sensitivity of the remote control light receiving unit is hardly reduced.

  As described above, the invention made by the present inventors has been specifically described based on the embodiments. However, the present invention is not limited to the above embodiments, and can be changed without departing from the gist of the invention.

  For example, the inner wall 22a of the rib may be formed in a tapered shape so that the opening area increases from the opening 21 toward the inside of the cabinet. In this case, even if the opening area is the same, signal light from a wider angle can be received, and when the rib is formed using the mold, it can be easily removed from the mold after molding.

  Further, the structure of the remote control light receiving section described above can be applied not only to the television receiver but also to other various remote control operable electric devices such as AV devices, lighting devices, and air / temperature control devices.

1 is an external view of a television receiver to which the structure of a remote control light receiving unit according to the present invention is applied. It is sectional drawing which shows the structure of the remote control light receiving part of a television receiver. It is a schematic diagram which shows the structure of the remote control light receiving part which concerns on this embodiment. It is sectional drawing which shows an example of the structure of the conventional remote control light receiving part. FIG. 9 is a cross-sectional view showing another example of the structure of a conventional remote control light receiving unit. It is a schematic diagram which shows the structure of the conventional remote control light receiving part.

Explanation of reference numerals

10 remote control light receiving element 11 light receiving surface 20 cabinet (equipment housing)
21 Opening 22 Rib 22a Rib inner wall 30 Printed circuit board 40 Nameplate

Claims (6)

In a remote control light receiving unit that is disposed at a predetermined position inside the housing of the electric device provided with the opening and includes a remote control light receiving element that receives a signal light from the remote control device through the opening,
Providing a reflective portion that has been subjected to mirror finishing by polishing on the inner wall of a rib extending substantially vertically from the opening to the inside of the housing,
When the opening is circular, the rib is formed in a tapered shape so that the opening area becomes larger toward the inside of the housing than the opening,
The radius of the opening is R, the vertical length of the rib is H, the distance from the opening to the light receiving surface of the remote control light receiving element is D, and the vertical direction of the opening of the signal light incident from the opening. When the incident angle with respect to the direction is θ,
The opening is
R ≧ (D · tan θ) / 3
The filling,
The rib is
H ≧ 2D / 3
The structure of the remote control light-receiving part characterized by being formed so as to satisfy the following. In a remote control light receiving unit that is disposed at a predetermined position inside the housing of the electric device provided with the opening and includes a remote control light receiving element that receives a signal light from the remote control device through the opening,
A structure of a remote control light receiving unit, wherein a rib extending substantially vertically from the opening to the inside of the housing and having a reflecting means on an inner wall is provided.   The structure of the remote control light-receiving unit according to claim 2, wherein the inner wall of the rib is mirror-finished by polishing. When the opening is circular, the rib is formed in a substantially cylindrical shape,
The radius of the opening is R, the vertical length of the rib is H, the distance from the opening to the light receiving surface of the remote control light receiving element is D, and the vertical direction of the opening of the signal light incident from the opening. When the incident angle with respect to the direction is θ,
The opening is
R ≧ D · tanθ
The filling,
The rib is
H ≧ 2D / 3
The structure of the remote control light receiving unit according to claim 2, wherein the remote control light receiving unit is formed to satisfy the following condition.   The structure of the remote control light receiving unit according to claim 4, wherein the rib is formed in a tapered shape such that an opening area becomes larger toward the inside of the housing than the opening.   An electric device operable by remote control, comprising a remote control light receiving unit having the structure according to claim 2.

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