JP4552472B2 - Security detection unit - Google Patents

Description

  The invention of this application relates to a crime prevention detection unit having a transmission / reception integrated configuration that incorporates a transmitter and a receiver, and is useful for an infrared security device that is attached to an exterior fence or the like and detects an intruder.

  2. Description of the Related Art Conventionally, there is known an infrared crime prevention device in which a transmitter and a receiver serving as a beam sensor are arranged to face each other, infrared rays are transmitted and received between them, and when infrared rays are blocked by an intruder.

This infrared security device is, for example, a fence security device that attaches to an external fence installed in a building such as a house and performs notification and intimidation when an infrared ray is blocked by an intruder getting over the external fence etc. It is considered that it can be used. Such infrared security devices are used outdoors, and when rainwater or the like enters the infrared security devices, the transmitter / receiver board with the transmitter and receiver attached gets wet with water, causing a malfunction or malfunction. There was a problem of causing. Therefore, conventionally, various devices have been proposed, such as making the outer case of the infrared security device a double structure, or sealing the case joint surface with a sealing material, a packing material, or the like. Even if rainwater or the like enters the infrared security device, a water drain hole is provided at the bottom of the infrared security device to prevent water from collecting in the infrared security device and prevent malfunctions and malfunctions. Infrared crime prevention devices that can be used (see, for example, Patent Documents 1 and 2) have been proposed.
JP 2001-14569 A JP 2003-296830 A

  However, when the case has a double structure, there is a problem in that the outer dimensions are large and the design is not good, and two cases are required, which increases the cost. Further, when sealing is performed by applying a sealing material, a packing material, or the like, it is difficult to manage the sealing performance, the number of parts increases, and it takes time to assemble. Further, even when a water drain hole is provided at the bottom of the infrared security device, since the water has entered and stayed in the infrared security device, the transmitter / receiver substrate may get wet with water.

  In view of the background as described above, the invention of this application is to provide a security detection unit that is easy to assemble without the transmitter / receiver substrate getting wet even if rainwater or the like enters the infrared security device. Yes.

In order to solve the above problems, the invention of this application is as follows. First, a unit body on one side and a unit body on the opposite side between the transmitter and receiver boards on which the transmitter and the receiver are mounted are arranged. In the security detection unit in which the unit main body is configured in combination, the transmitter / receiver substrate has an outer shape with a gap for drainage between the outer peripheral surface of the transmitter / receiver substrate and the inner wall of the unit main body, There is provided a crime prevention detection unit characterized in that the gap is provided uniformly with respect to the inner wall of the unit body, and a drain hole is provided in the bottom of the unit body.

The second, on the inside of one side of the unit body is provided with projecting a substrate pushing boss, the substrate pushing boss, provided projecting from the inside of the opposite unit body Provided is a crime prevention detection unit characterized in that a transmitter / receiver substrate is sandwiched and fixed between a substrate fixing boss.

  Third, a step is provided behind the tip of the board fixing boss, and the tip of the board fixing boss is inserted into the board fixing hole provided in the transceiver board. A crime prevention detection unit is provided in which the transceiver board is positioned and fixed.

  Fourthly, the crime prevention detection unit is characterized in that the substrate pressing boss and the substrate fixing boss are screw-fixed so that the unit bodies are fixed to each other.

  According to the first invention of this application, even if rainwater or the like enters the unit body, the water transmitted through the unit body inner wall does not get wet with the transmitter / receiver board, and the water is discharged outside the unit body. The substrate can be protected.

  According to the second invention, in addition to the effect of the first invention, the transmitter / receiver board can be fixed without contact between the outer peripheral side surface of the transmitter / receiver board and the inner wall of the unit main body.

  According to the third aspect of the invention, in addition to the effects of the second aspect of the invention, it is possible to assemble and fix the transmitter / receiver substrate by providing the substrate fixing hole in the transmitter / receiver substrate without requiring a dedicated substrate fixing structure. It can be made easier.

  According to the fourth invention, together with the effects of the second and third inventions, the unit bodies can be fixed to each other without requiring a dedicated unit body fixing structure.

  The invention of this application has the characteristics as described above, and the embodiments of the invention will be described in more detail below.

  1 to 3 are an exploded perspective view, a main part front view, and a main part enlarged sectional view for explaining an embodiment of the invention of this application.

  In the present embodiment, as illustrated in FIGS. 1 to 3, a transmission unit as a beam sensor unit is provided on the upper and lower two stages on one side of the security detection unit, and the beam sensor unit is arranged on the upper and lower two stages on the opposite side. As an example, a so-called double beam type transmitter / receiver back-to-back integrated crime prevention detection unit provided with a receiving unit as a unit body (1) is formed by a transmitting unit body (2) and a receiving unit body (3). In the unit body (1), the transmitter / receiver board (4) is built in between the transmitter unit body (2) and the receiver unit body (3). The transmission side unit body (2) and the reception side unit body (3) also serve as a transmission unit cover and a reception unit cover.

  In this case, first, a transmitter (not shown) constituting the transmitter and its circuit (not shown), a receiver (6a) (6b) constituting the receiver and its circuit (not shown), etc. (1) Mounted on the front and back surfaces of a single transmitter / receiver board (4) extending vertically within the board at the corresponding positions on the transmitting side and the receiving side and in the upper and lower two-stage positions. Yes. The transmitter and receiver (6a) (6b) may be any element that can emit infrared light and receive infrared light.

  The outer shape of the transceiver board (4) is such that a drainage gap (5a) is formed between the outer peripheral side surface of the transceiver board (4) and the inner wall of the unit body (1), and the unit body (1 ) A drain hole (5b) is provided at the bottom. The drain gap (5a) is provided uniformly with respect to the inner wall of the unit body (1), and it is optimal to set the gap amount to about 3 mm so that the drain can be smoothly drained.

  In the unit main body (1) as described above, for example, as illustrated in FIG. 2, rainwater or the like enters the unit main body (1) due to deterioration of the seal of the unit main body (1), and the inner wall surface of the unit main body (1). Even if water is transmitted to the transmitter / receiver board, it is discharged without staying in contact with the transmitter / receiver board (4) and drained from the drain hole (5b) at the bottom of the unit body (1). The gap amount is not limited to this as long as water droplets traveling on the inner wall do not stay on the transmitter / receiver substrate (4).

  The transceiver board (4) is housed in the unit body (1) so as to be sandwiched between the transmission side unit body (2) and the reception side unit body (3) from both sides thereof. At this time, the board pressing boss (31) is provided so as to protrude inside the reception side unit body (3), and the board side pressing boss (31) is opposed to the transmission side unit body (2). A board fixing boss (21) protrudes from the inside. The board pressing boss (31) presses the transceiver board (4) against the board fixing boss (21), so that the transceiver board (4) is fixed. The substrate pressing boss (31) and the substrate fixing boss (21) can fix the transmitter / receiver substrate (4), and the transmitter and receiver (6a) (6b) on the transmitter / receiver substrate (4). Or a position where it does not come into contact with the circuit.

  Further, as illustrated in FIG. 3, a step portion (212) is provided behind the tip end portion (211) of the substrate fixing boss (21), and a substrate fixing hole (41) is provided in the transmitter / receiver substrate (4). The tip portion (211) of the substrate fixing boss (21) is inserted into the substrate fixing hole (41), and the step portion (212) provided behind the tip portion (211) is a transmitter / receiver substrate ( The transmitter / receiver substrate (4) may be positioned and fixed at the stepped portion (212) by contacting with 4). The size of the substrate fixing hole (41) is smaller than that of the substrate pressing boss (31), so that the step portion (212) cannot pass therethrough. Further, the setting position of the step portion (212) of the substrate fixing boss (21) is the tip of the substrate fixing boss (21) when the step portion (212) is in contact with the transceiver substrate (4) ( 211) It is considered that the surface is provided behind the tip end portion (211) of the board fixing boss (21) so that the surface is flush with or lower than the transceiver board (4).

  As described above, the transmitter / receiver substrate (4) is positioned and fixed at the stepped portion (212), so that a complicated structure for positioning dedicated to the transmitter / receiver substrate (4) can be obtained. There is no need to separately form 2) or the receiving unit body (3).

  Further, the board pressing boss (31) has a hollow structure, and the fixing screw is inserted from the outside of the receiving side unit body (3) through the screw insertion opening (311) in the board pressing boss (31) to transmit the transmitting side unit. By screwing it into the screw pilot hole (213) in the board fixing boss (21) of the body (2), the transceiver board (4) can be connected to the transmission side unit body (2) and the reception side unit body (3). Screws may be fixed. As a result, the transmitter / receiver substrate (4) is not only fixed between the substrate pressing boss (31) and the substrate fixing boss (21), but the unit bodies are bonded and fixed together. 1) It is not necessary to separately form a screw-fixing structure for joining in the transmission side unit body (2) or the reception side unit body (3).

  The security detection unit assembled in this way has a board pressing boss (31) for fixing the transmitter / receiver board (4) and a board fixing boss (21). Since it also functions as a stop structure, the number of parts is small and simple assembly can be realized.

  It goes without saying that the invention of this application is not limited to the above-described embodiments, and various aspects are possible in detail. For example, in each of the above embodiments, the transmitter and receiver (6a) (6b) are each provided with a double beam system having two upper and lower stages, but the present invention can also be applied to a multibeam system with three or more upper and lower stages. Although the transmitter and receiver (6a) (6b) are arranged back to back, the present invention can also be applied to a case where the transmitter and receiver (6a) (6b) are arranged one above the other on only one side. Furthermore, it is good also as a unit which also incorporated the detection alerting | reporting element.

It is the disassembled perspective view which showed one Embodiment of invention of this application. It is a principal part front view for demonstrating the flow of the water which permeated in the unit body. It is a principal part expanded sectional view which showed the state after an assembly.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Unit main body 2 Transmission side unit body 21 Board fixing boss 211 Tip part 212 Step part 213 Screw lower hole 3 Reception side Ut body 31 Board pressing boss 311 Screw insertion port 4 Transceiver board 41 Board fixing hole 5a Drain gap 5b Drain hole 6a, 6b Receiver

Claims (4)

In a security detection unit in which a unit body is configured by combining a unit body on one side and a unit body on the opposite side with a transmitter / receiver board on which a transmitter and a receiver are mounted, the transceiver board is The outer shape of the transmitter / receiver board and the inner wall of the unit main body have an outer shape, and the drainage gap is provided uniformly with respect to the inner wall of the unit main body. Is a security detection unit characterized by a drain hole. The inner side of the unit body is provided with projecting a substrate pushing boss, the substrate pushing boss, and the board fixing bosses provided in projecting inside the opposite unit body The crime prevention detection unit according to claim 1, wherein the transmitter / receiver board is sandwiched between and fixed. A step is provided behind the tip of the board fixing boss, and the tip of the board fixing boss is inserted into the board fixing hole provided in the board for the transmitter / receiver. The security detection unit according to claim 2, wherein the substrate is positioned and fixed. The security detection unit according to claim 2 or 3, wherein the substrate pressing boss and the substrate fixing boss are fixed by screws to fix the unit bodies to each other.

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