JP2007059571A - Remote control sensor - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a remote control sensor which can surely and easily be mounted on a substrate having a sensor circuit formed thereon and comprises a shield cover which can be miniaturized by suppressing the mounting space on the substrate. <P>SOLUTION: This remote control sensor 11 comprises the substrate 12 having an external connection electrode 21 at the corner thereof, a sensor circuit 13 having a light-receptive function mounted on the substrate 12, a sealing resin body 14 for sealing the sensor circuit 13, and the shield cover 15 for covering the sealing resin body 14 and fixed to the substrate 12. The shield cover 15 is formed to have a lock pawl 25 to be locked with the external connection electrode 21 provided in the recess at the corner of the substrate 12. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a remote control (remote control) sensor built in an electric product such as a television and having a light receiving circuit unit that receives a remote operation command via light such as infrared rays. In particular, a shield cover that covers the light receiving circuit unit is attached. This relates to a remote control sensor.

  Remote control devices often installed in electrical products such as TVs and VCRs are equipped with a receiving unit (remote control sensor) built in the main body of the electrical product, and operating commands from a remote location toward the remote control sensor such as infrared rays. And a transmission unit for sending out. FIG. 4 shows the external shape of a conventional remote control sensor 1 (see Patent Document 1). The remote control sensor 1 includes a substrate 2, a sensor circuit portion (not shown) mounted on the substrate 2, a sealing resin body 3 for sealing the upper portion of the sensor circuit portion, and the sealing resin body. 3 and a shield cover 4 fixed to the substrate 2.

  The sensor circuit section receives a light receiving element such as a phototransistor or a photo IC that receives light in the infrared region, converts light received by the light receiving element into an electric signal, and decodes an operation command to perform an actual operation. It is composed of various integrated circuits (ICs) to be performed, and other resistors and capacitors.

  External connection electrodes (through-hole electrodes) 5 as shown in FIG. 5 are provided at four corners of the substrate 2 where the sensor circuit portion is formed, and locking holes for fixing the shield cover 4 are provided on the side surfaces. 6 is provided. The locking hole 6 is a through hole without an electrode formed together with the through-hole electrode 5 and is provided only for fixing the shield cover 4. Reference numeral 7 denotes a pattern region in which an electrode pattern and a wiring pattern for forming the sensor circuit portion are provided.

The shield cover 4 includes a top plate 4a that covers the top surface of the sealing resin body 3 excluding the window hole 8 that exposes a part of the sensor circuit portion, and the sealing resin body 3 from the outer periphery of the top plate 4a. It is integrally formed with the side plate 4b covering up to the side surface. Further, a leg portion 10 having a locking claw 9 which can be bent toward a locking hole 6 provided in the substrate 2 is provided at a lower end portion of the side plate 4b. The shield cover 4 is formed of a metal material, and has a role of shielding unnecessary electromagnetic waves and the like while protecting the sensor circuit portion.
JP 2003-37276 A

  In the remote control sensor 1, the substrate 2 must be provided with a through-hole serving as the external connection electrode 5 and a through-hole for locking the locking claw 9 provided on the shield cover 4. There is a problem that additional man-hours and costs are required.

  Further, since the wiring pattern for forming the sensor circuit portion is formed on the substrate 2, the locking hole 6 for locking the locking claw 9 is made to avoid the pattern region 7 of the sensor circuit portion. It is necessary to secure a separate space for providing the locking hole 6. For this reason, there is a problem that the size of the substrate 2 is increased, and miniaturization of the remote control sensor 1 is restricted.

  SUMMARY OF THE INVENTION An object of the present invention is to provide a remote control including a shield cover that can be reliably and easily attached to a substrate on which a sensor circuit is formed and can be reduced in size by reducing the space for attachment to the substrate. It is to provide a sensor.

  In order to solve the above problems, a remote control sensor according to the present invention includes a substrate having external connection electrodes at corners, a sensor circuit unit having a light receiving function mounted on the substrate, and sealing the sensor circuit unit. In the remote control sensor provided with a sealing resin body that covers the sealing resin body and is fixed to the substrate, the shield cover includes an external connection electrode provided at a corner of the substrate. A locking claw to be locked is formed.

  According to the remote control sensor of the present invention, the shield cover to be attached to the substrate on which the sensor circuit is formed has a locking claw corresponding to the external connection electrode provided at the corner of the substrate. Therefore, the shield cover can be reliably and easily fixed to the substrate. Further, since it is not necessary to provide a dedicated locking hole for attaching the shield cover, the size of the substrate can be minimized and the entire remote control sensor can be downsized.

  Hereinafter, embodiments of a remote control sensor according to the present invention will be described in detail with reference to the accompanying drawings.

  As shown in FIGS. 1 and 2, the remote control sensor 11 of the present invention includes a substrate 12, a sensor circuit portion 13 formed on the substrate 12, and a sealing resin body 14 that seals the sensor circuit portion 13. And a shield cover 15 having a window hole 26 in a part covering the sealing resin body 14. The remote control sensor 11 is mounted with the surface of the shield cover 15 in which the window hole 26 is formed facing the back side of an operation panel on the front surface of a television or the like.

  As shown in FIG. 3, the substrate 12 is formed in a quadrangular shape using an epoxy resin or the like, and external connection electrodes 21 are provided in the four corners so as to be recessed in an arc shape. The external connection electrode 21 is a through-hole electrode that penetrates from the front surface to the back surface of the substrate 12. On the surface of the substrate 12, an electrode pattern and a wiring pattern (not shown) for mounting the sensor circuit unit 13 including a light receiving element and other electronic components are formed. Reference numeral 18 denotes a pattern area in the sensor circuit unit 13. The sensor circuit unit 13 is an integrated circuit (IC) having a light receiving element composed of a photodiode or a phototransistor and a function for converting light detected by the light receiving element into an electric signal and performing various signal processing. ), Resistors and capacitors. The sensor circuit portion 13 is sealed on the substrate 12 by a sealing resin body 14 formed of an epoxy resin that easily transmits infrared rays. The sealing resin body 14 has a role of protecting the sensor circuit unit 13 from external impact, moisture, and the like.

  The shield cover 15 is formed of a thin metal plate such as phosphor bronze or iron having good conductivity, and as shown in FIG. 2, a rectangular top plate 22 covering the upper surface of the sealing resin body 14, The side plates 23a to 23d that are in close contact with the side surface of the sealing resin body 14 from the periphery of the top plate 22 and the leg portions 24 that extend from the lower ends of the side plates 23a and 23c are integrally formed. The top plate 22 is provided with a window hole 26 for exposing the light receiving region 16 in the sensor circuit portion 13 sealed with the sealing resin body 14. The side plates 23 a to 23 d are in close contact with and cover the four-direction side surfaces of the sealing resin body 14 to shield the sensor circuit portion 13 sealed with the sealing resin body 14. The side plates 23a to 23d are formed by bending downward from the outer peripheral portion of the top plate 22 with a press or the like, or by drawing a single metal plate. The leg portion 24 is provided so as to protrude along the side surface of the substrate 12 from the lower end portions of the side plates 23 a and 23 c corresponding to the external connection electrode 21, and the distal end portion thereof is bent toward the external connection electrode 21. A possible locking claw 25 is provided. The locking claw 25 is fixed by being bent so as to be hooked on a part of the recessed portion of the external connection electrode 21. However, in order to secure the fixing more securely, the engaging claw 25 is bent so as to be closely attached along the recessed portion. Also good. Further, the leg portions 24 may be provided corresponding to all the external connection electrodes 21 formed at the four corners of the substrate 12, but as shown in the present embodiment, they are positioned at least on the diagonal line. What is necessary is just to form so that it may latch on any one pair of external connection electrode 21. FIG. Thus, the fixing to the substrate 12 can be ensured only by providing a pair of the locking claws 25 on the shield cover 15. In the present embodiment, the leg portions 24 are provided on the side plates 23a and 23c. However, the leg portions 24 may be provided on other opposing side plates 23b and 23d.

  As shown in FIG. 2, the shield cover 15 covers the sealing resin body 14 so that the light receiving region 16 of the sensor circuit unit 13 is exposed from the window hole 26, and the side plate 23 is sealed. The resin body 14 is brought into close contact with the side surface. Then, the leg 24 extending from the side plate 23 is brought into close contact with the side surface of the substrate 12, and the latching claw 25 is bent inward to be hooked on the recessed portion of the external connection electrode 21. Since the external connection electrode 21 is a through-hole electrode, it is recessed in an arc shape. However, the external connection electrode 21 is not limited to such an arc shape. For example, the corner portion of the substrate 12 is cut into an acute angle shape. What is necessary is just to have a recessed part which the said latching claw 25 catches like a groove | channel.

  Further, the sensor circuit portion 13 sealed with the sealing resin body 14 is shielded by a shield cover 15 made of a metal plate having good conductivity, except for the upper surface and side surfaces except for the light receiving region 16. It is possible to effectively shield harmful radio waves such as electromagnetic waves that adversely affect the portion 13. Further, the connection with the external connection electrode 21 is achieved through the locking claw 25. In particular, by connecting at least one of the external connection electrodes 21 fixed by the locking claws 25 to a ground line such as a mother board, the shielding effect is further ensured. As a result, it is possible to maintain a stable operation state for a long period of time without lowering the light receiving sensitivity such as infrared rays in the sensor circuit unit 13.

  In the above embodiment, the substrate 12 constituting the sensor circuit unit 13 is formed in a quadrangular shape having through-hole electrodes at the four corners, but is not limited to such a square-shaped substrate, for example, Alternatively, a triangular or polygonal substrate may be used, and concave external connection electrodes or through-hole electrodes may be provided at the corners. The shield cover is formed of a top plate adapted to the various substrate shapes and a side plate closely contacting the side surface of the substrate from the periphery of the top plate, and extends from the side plate toward the external connection electrode or the through-hole electrode. A locking claw is formed at the tip of the leg. In this way, even when the substrate shape constituting the sensor circuit section varies depending on the mounting space of various electronic devices, a small remote control sensor that minimizes the space required for mounting the shield cover is formed. It becomes possible to do.

  As described above, according to the remote control sensor 11 of the present invention, the mounting of the shield cover 15 is hooked and fixed to the external connection electrode 21 in which the corners of the substrate 12 are recessed. And the like, and there is no need to provide a restriction that the electrode pattern and the wiring pattern are routed around the hole. For this reason, it is possible to reduce manufacturing man-hours and manufacturing costs, and to perform stable remote operation without malfunction. Further, since the shield cover 15 is formed of a conductive member, and the locking claw 25 for fixing the shield cover 15 is directly connected to the external connection electrode 21, electrical grounding via the substrate 12 is achieved. It can be done reliably and easily.

It is a perspective view of the remote control sensor which concerns on this invention. It is an assembly perspective view of the remote control sensor. It is a bottom view of the remote control sensor. It is a perspective view of the conventional remote control sensor. It is a bottom view of the conventional remote control sensor.

Explanation of symbols

DESCRIPTION OF SYMBOLS 11 Remote control sensor 12 Board | substrate 13 Sensor circuit part 14 Sealing resin body 15 Shield cover 16 Light reception area | region 18 Pattern area | region 21 External connection electrode 22 Top plate 23 Side plate 24 Leg part 25 Locking claw 26 Window hole

Claims (6)

A substrate having an external connection electrode at a corner, a sensor circuit unit having a light receiving function mounted on the substrate, a sealing resin body for sealing the sensor circuit unit, and covering the sealing resin body, In a remote control sensor comprising a shield cover fixed to the substrate,
The remote control sensor according to claim 1, wherein the shield cover is formed with a locking claw that is locked to an external connection electrode provided at a corner of the substrate. The remote control sensor according to claim 1, wherein the external connection electrodes are formed at four corners of a rectangular substrate, and the locking claws are locked to any pair of external connection electrodes located on a diagonal line. The remote control sensor according to claim 1, wherein the external connection electrode is a through-hole electrode that is recessed in a corner of the substrate. The shield cover includes a top plate that covers the top surface of the sealing resin body, a side plate that covers the side surface of the sealing resin body from the periphery of the top plate, and the locking claws provided at the lower end of the side plate. The remote control sensor according to claim 1 formed. The remote control sensor according to claim 4, wherein the locking claw is formed at a tip end of a leg portion extending from a lower end of the side plate to a side surface of the substrate, and the tip end portion is bent to be locked to the external connection electrode. The remote control sensor according to claim 1, wherein the shield cover is formed of a conductive member and is grounded through the external connection electrode.

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