JP4731353B2 - Enclosure for electrical equipment with airtightness sensing function - Google Patents

Description

  The present invention relates to a housing for electrical equipment, and more particularly to a housing with an airtightness sensing function capable of sensing whether the airtightness of an opening edge of a housing body and an opening edge of a lid covering the housing body is secured. .

  Various communication devices such as amplifiers, branching devices, optical transmitters / receivers, mixers for CATV systems, and other electric devices include those for outdoor use and indoor use. Some devices have a housing body and a lid, and when the lid is closed, the opening edge and the opening edge of the housing body are hermetically closed. This type of housing needs to ensure the airtightness of the housing in order to prevent wind and rain and dust from entering the housing. For this reason, it is necessary to detect the presence or absence of airtightness. An airtightness sensing method as shown in FIG.

  The airtightness sensing method shown in FIG. 6 has a push button switch 54 attached to one of the lid 52 and the housing body 53 and a switch push bar 55 attached to the other, and the push button switch 54 is switched by opening and closing the lid 52. It is a mechanical sensing method (mechanism sensing method) that is turned on / off by being pushed by the push bar 55 or released, and senses the airtightness of the casing 51 by turning on / off. is there.

  In the airtightness sensing method shown in FIG. 7, an infrared LED 56 is provided on one of the lid 52 and the casing main body 53, and the infrared sensor 57 receives the light irradiated from the infrared LED 56 and reflected by the inner wall of the casing. This is an infrared reflection type sensing system that constantly monitors the received light level of infrared rays to sense the airtightness of the casing 51. There is also an infrared translucent sensing method in which an infrared LED 56 is provided on one of the lid 52 or the casing body 53 and an infrared sensor 57 is provided on the other, and the infrared sensor 57 receives infrared rays generated from the infrared LED 56.

The mechanical sensing method shown in FIG. 6 has the following problems.
(1) If the processing accuracy and assembly accuracy of the lid, main body, and parts are low, the push button switch 54 cannot be switched on and off smoothly, and the airtightness of the casing 51 cannot be accurately detected. Therefore, accuracy is required for processing and assembly of each part, and skill is also required.
(2) Since the push button type switch 54 has a stroke (play), the lid is not sufficiently tightened and the airtightness is impaired. If the pressing amount of the switch is less than the stroke, the switch 54 may not operate. . In this case, the airtightness is impaired, but it cannot be detected.

The infrared detection method shown in FIG. 7 has the following problems.
(1) If there is a wiring cable or the like that prevents the passage of infrared rays in the infrared passage area in the casing 51, the infrared rays will not hit the infrared sensor 57, or the light reception level at the infrared sensor 57 will be insufficient and the sensor function will be Since it is obstructed, the airtightness of the casing 51 cannot be detected.
(2) Since the detection range of the light reception level is wide, the infrared sensor 57 does not react even if a delicate tightening failure that cannot ensure the airtightness of the housing 51 occurs, and the airtightness failure of the housing 51 cannot be detected.

  The present invention provides a casing with a hermeticity sensing function equipped with a sensing structure that can detect whether or not the casing is airtight and can reliably detect even a small tightening failure.

The housing for an electrical device with an airtightness sensing function of the present application includes a main body and a lid covering the main body, and a packing accommodating groove on the opening edge of the main body, and a packing accommodating groove on the opening edge of the lid. in both or either one housing for electric equipment packing is accommodated, the packing is accommodated in the packing accommodating groove thereon protrudes from the packing accommodating groove, pressure sensitive at the top of the front Symbol packing sensor with Is provided, and when the lid and the main body are sealed with the packing interposed therebetween, they are pressurized and output a voltage.

  The electrical equipment casing with an airtightness sensing function according to the present application is the electrical equipment housing with an airtightness sensing function according to the first aspect of the present invention. The sensor can be housed in the housing recess.

According to a third aspect of the present invention, there is provided a casing for an electrical device having an airtightness sensing function, which includes a main body and a lid covering the main body, a packing receiving groove on the opening edge of the main body, and a packing receiving groove on the opening edge of the lid. in both or either housing for electrical equipment packing is accommodated in one, the packing is accommodated in the packing accommodating groove, the sensor accommodation groove provided in the main body or the lid, the pressure sensor is accommodated in the A protrusion that can pressurize the pressure-sensitive sensor when the lid and the main body are sealed with the packing sandwiched between the casing and the pressure-sensitive sensor. The voltage can be output when the pressure is applied.

  The electrical equipment casing with an airtightness sensing function according to the present application is the electrical equipment housing with an airtightness sensing function according to any one of claims 1 to 3, A detection circuit may be connected to the pressure sensor so that a signal that can be transmitted by wire or wirelessly is output from the detection circuit to the outside.

The case with the airtightness sensing function according to claim 1 of the present application has the following effects.
(1) Since a pressure-sensitive sensor is provided at the opening edge that closes the lid and the main body, when the pressure sensor is pressurized with the lid closed, airtightness is reliably detected, the detection accuracy is improved, and the lid is tightened delicately. Even bad (insufficient closing) can be accurately detected.
(2) Since it is not necessary to provide a push switch, a push rod, an infrared light emitting element, a light receiving element, or the like in the housing, the inside of the housing is not complicated, and wiring, maintenance, and the like are facilitated.

In addition to the above effects, the case with the airtightness sensing function according to claim 2 of the present application has the following effects.
(1) Since the whole or part of the packing is a pressure sensor, the sensitivity is good. When the whole is a pressure sensor, the sensitivity is particularly good, and even subtle tightening defects can be detected reliably, ensuring airtightness. .
(2) When the pressure-sensitive sensor is embedded or stacked in the packing, the packing is not enlarged or complicated, and the inside of the housing is not complicated.

In the case with the airtightness sensing function according to claim 3 of the present application, the packing is accommodated in the packing accommodating groove, the pressure sensor is accommodated in the sensor accommodating groove provided in the main body or the lid, A protrusion that can pressurize the pressure-sensitive sensor is provided at the opening edge facing the pressure sensor when the lid and the main body are sealed with the packing interposed therebetween, and the pressure-sensitive sensor generates a voltage when pressed by the protrusion. Since the output is provided , if the pressure sensor and the pressure sensor are provided in the existing housing as described above, the airtightness of the housing can be detected only by detecting the output from the pressure sensor .

In addition to the above effects, the case with the airtightness sensing function according to claim 4 of the present application has the following effects.
(1) When the detection circuit is connected to the pressure sensor, the indicator lamp is connected to the detection circuit, and the indicator lamp is provided on the main body or the lid, the detection by the pressure sensor is displayed on the indicator lamp through the detector circuit. The airtight state of the housing can be confirmed by visually confirming the lighting state of the indicator lamp.
(2) When a detection circuit is connected to the pressure sensor, an indicator light is connected to the detection circuit, and an indicator light is provided at the monitoring location, the detection by the pressure sensor is confirmed or monitored at a remote monitoring location. It becomes easy to monitor.

The casing with the airtightness sensing function of the present application is connected to the pressure sensitive sensor in the casing with the airtightness sensing function according to any one of claims 1 to 4, as described in claim 5. Since a signal that can be transmitted by wire or wirelessly is output from the detection circuit to the outside, the following effects can be obtained in addition to the above effects.
(1) Since a signal that can be transmitted by wire or wirelessly is output from the detection circuit connected to the pressure sensor, it is possible to check the airtight state in real time on a monitor TV or the like in the center or other remote locations. It is possible to check the housing in which an abnormality has occurred reliably and without going to the housing installation location one by one. This facilitates airtightness management and maintenance.

(Embodiment 1)
An example of an embodiment of a casing with an airtightness sensing function of the present invention will be described with reference to FIGS. In this embodiment, as shown in FIG. 1, a lid 2 for opening the lower surface of the housing 1 and a main body 3 for opening the upper surface are provided. 7, the packing 7 includes a pressure sensor (piezoelectric sensor) 8, and a detection circuit 9 is connected to the pressure sensor 8. A groove 10 is also formed on the entire periphery of the opening edge 4 of the lid 2 so that a shield wire (not shown) can be accommodated therein.

  The housing 1 is used for various outdoor or indoor communication devices such as an amplifier, a branching device, an optical transmitter, an optical receiver, a mixer, a converter, a signal oscillator, and a switching device. Is formed separately, and the lid 2 is connected to the main body 3 so that it can be opened and closed by a hinge or other connecting means.

  The packing 7 is formed in a ring shape with rubber, resin or the like, as in this existing packing, and a plurality of pressure sensors 8 are embedded at predetermined intervals in the ring direction as shown in FIGS. When the lid 2 is put on the main body 3, the packing 7 is sandwiched between the opening edge 4 of the lid 2 and the opening edge 5 of the main body 3 as shown in FIGS. The airtightness of the main body 3 is ensured, and the pressure sensor 8 is pressed (pressurized) to generate a voltage (current). The output voltage (current) is detected by a detection circuit 9 connected thereto, and an unillustrated indicator lamp connected to the detection circuit is turned on, extinguished, blinking, etc. Confirms that the airtightness is maintained by confirming that the light is turned off. An LED, a light bulb, or the like can be used as the indicator lamp.

  The pressure-sensitive sensor 8 in FIG. 3 is embedded in the upper part of the packing 7, and the upper part of the pressure-sensitive sensor 8 in FIG. 4 is exposed on the upper surface of the packing 7. In the case of FIG. 4, the pressure when the lid 2 is closed is directly applied to the pressure-sensitive sensor 8, so the sensing sensitivity is improved as compared with the built-in type of FIG. In the present invention, the entire packing 7 can be used as the pressure-sensitive sensor 8.

(Embodiment 2)
Another embodiment of the case with a hermeticity sensing function of the present invention will be described with reference to FIGS. As shown in FIGS. 5 (a) and 5 (b), the housing 1 of the present embodiment accommodates an airtight packing 7 in a groove 6 formed on the entire circumference of the opening edge 5 of the main body 3, and a lid The shield wire (not shown) can be accommodated in the groove 10 formed in the entire circumference of the two opening edges 4. The opening edge 5 of the main body 3 is formed with a groove 11 for accommodating a pressure sensor, in addition to the groove 6 for accommodating the packing, and a pressure sensor 8 is accommodated inside the lid 2. A protrusion 12 that presses (presses) the pressure-sensitive sensor 8 when the lid 2 is put on the main body 3 is formed. Therefore, when the lid 2 is put on the main body 3, the packing 7 is sandwiched between the opening edge 4 of the lid 2 and the opening edge 5 of the main body 3 as shown in FIG. Airtightness is ensured, and the pressure sensor 8 is pushed (pressed) by the protrusion 12 to generate a voltage (current). In the present embodiment, the airtightness between the lid 2 and the main body 3 is ensured by the packing 7, but the opening edge 5 of the main body 3 and the opening edge 4 of the lid 2 do not completely adhere due to the thickness of the packing 7. Even in this case, the protrusion 12 can press (press) the pressure-sensitive sensor 8.

(Embodiment 3)
The mounting position and mounting structure of the packing 7 and the pressure sensor 8 are not limited to those shown in FIGS. 1 to 5 and may be arbitrary. For example, the packing 7 and the pressure sensor 8 can be attached to the opening edge 4 of the lid 2, or can be attached to both the opening edge 4 of the lid 2 and the opening edge 5 of the main body 3. The packing 7 and the pressure-sensitive sensor 8 can be separately attached to the opening edge 4 of the lid 2 and / or the opening edge 5 of the main body 3.

  The number, size, shape, and the like of the pressure sensitive sensor are not limited to the numbers shown in FIGS. 1 to 4 and may be arbitrary. Moreover, a pressure-sensitive sensor can be provided in the whole packing, or the packing itself can be used as a pressure-sensitive sensor. The packing is not limited to rubber, but may be made of any material as long as it has flexibility and can secure the airtightness between the lid and the main body.

  The case with the airtightness sensing function of the present invention is not limited to the case of communication devices, but can be applied to cases that require airtightness, such as cases for other electrical devices and electronic devices. .

Cross-sectional explanatory drawing which shows an example of embodiment of the housing | casing with an airtightness sensing function of this invention. (A), (b) is expanded sectional explanatory drawing which shows a part of lid | cover of a housing | casing with an airtightness sensing function shown in FIG. 1, and a main body. (A) shows a state where the lid and the main body are separated from each other, and (b) shows a state where the lid is fixed to the main body. The expanded cross-section explanatory drawing of the packing of the housing | casing with an airtightness sensing function shown in FIG. Explanatory sectional explanatory drawing of the packing of another example of embodiment of the housing | casing with an airtightness sensing function of this invention, and a pressure-sensitive sensor. (A), (b) is expanded sectional explanatory drawing which shows another example of embodiment of the housing | casing with an airtightness sensing function of this invention. (A) shows a state where the lid and the main body are separated from each other, and (b) shows a state where the lid is fixed to the main body. Cross-sectional explanatory drawing which shows an example of embodiment of the conventional airtight determination structure for housing | casings. Cross-sectional explanatory drawing which shows another example of embodiment of the conventional airtightness determination structure for housing | casing.

DESCRIPTION OF SYMBOLS 1 Case 2 Lid 3 Main body 4 Opening edge (of lid) 5 Opening edge of (main body) 6 Groove (for packing accommodation) 7 Packing 8 Pressure sensor 9 Detection circuit 10 Groove (for shielding wire accommodation)

Claims (4)

In a housing for an electric device comprising a main body and a lid covering the main body, and packing is accommodated in either or both of the packing accommodating groove on the opening edge of the main body and the packing accommodating groove on the opening edge of the lid,
The upper part of the packing protrudes from the packing housing groove and is housed in the packing housing groove,
Is the pressure sensor provided in an upper portion of the front Symbol packing, pressurized when the lid and the body is sealed by sandwiching the gasket to output a voltage,
A housing for an electrical device with an airtightness sensing function. In the housing | casing for electrical equipment with an airtightness sensing function of Claim 1,
An accommodation recess is provided at the top of the packing,
A pressure-sensitive sensor is housed in the housing recess,
A housing for an electrical device with an airtightness sensing function. In a housing for an electric device comprising a main body and a lid covering the main body, and packing is accommodated in either or both of the packing accommodating groove on the opening edge of the main body and the packing accommodating groove on the opening edge of the lid,
The packing is housed in the packing housing groove;
A pressure sensitive sensor is accommodated in the sensor accommodating groove provided in the main body or the lid,
Wherein the opening edge facing the pressure sensor of the housing, the lid and body the sense of pressure sensors can be pressurized protrusion is provided to be sealed across the packing,
The pressure sensor outputs a voltage when pressed by the protrusion,
A housing for an electrical device with an airtightness sensing function.   4. The electrical equipment housing with an airtightness sensing function according to claim 1, wherein a detection circuit is connected to the pressure sensor, and a signal that can be transmitted from the detection circuit to the outside in a wired or wireless manner. Is a housing for an electric device with an airtightness sensing function.

Images