JP5213987B2 - Sensor display structure - Google Patents

Description

  The present invention relates to a sensor that detects flame and smoke in a monitoring area, and more particularly to a display structure of a sensor that is characterized by a display structure for displaying various states such as a detection state.

  Conventionally, various sensors for detecting flames and smoke in a monitoring area have been proposed. Such a sensor is generally provided with a light source such as an LED (Light Emitting Diode) as a display means for displaying the state of the power supply and the detection state of flame or smoke. Such a light source is disposed so as to be exposed to the outside through an opening provided in the housing of the sensor, and light emitted from the light source can be emitted to the outside of the housing.

  For example, Japanese Utility Model Laid-Open No. 7-3089 discloses a flame detector including a detection unit that detects invisible light rays such as ultraviolet rays and infrared rays emitted from a flame. The flame detector includes a detection unit. An indicator lamp is provided as a light source for displaying the operating state and the like. This indicator lamp is disposed so as to be exposed to the outside from an opening formed in the cover of the flame detector (see, for example, Patent Document 1).

Japanese Utility Model Publication No. 7-3089

  Here, in recent years, it is desired that a sensor installed in a place where it is easy to touch, such as a general house or a commercial facility, to have a high design so as not to make the user feel uncomfortable with the surroundings. However, when an opening is formed in the housing of the sensor as in the prior art, and the light source is exposed to the outside from the opening, the opening and the light source stand out, causing a sense of incongruity. There was a problem that the designability was impaired.

  The present invention has been made in view of the above, and provides a sensor display structure capable of enhancing the design and commercial value of the sensor by arranging the light source without making it conspicuous. With the goal.

In order to solve the above-described problems and achieve the object, the sensor display structure according to claim 1 is a display structure in a sensor that detects a predetermined physical quantity in a monitoring region, and detects the physical quantity. Detecting means for emitting light, a light source arranged so as not to be directly visible from the outside of the sensor, and arranged around the detecting means to protect the detecting means And a protective transmission means for transmitting at least a part of the light emitted from the light source, and the detection means is an ultraviolet detection means for detecting ultraviolet light in a monitoring region, and the protective transmission means Is formed using a material containing a resin having ultraviolet absorptivity, and the protective transmission means is disposed between the light source and the detection means .

The sensor display structure according to claim 2 is the sensor display structure according to claim 1 , wherein the protective transmission means has a planar shape larger than the planar shape of the light source, and the protective transmission means. It characterized that you completely covering the light source by.

According to the first aspect of the present invention , since the light source is not directly visible from the outside of the sensor, the light from the light source is transmitted through the protective transmission means. In addition, since only the protective transmission means is in contact with the human eye and display components such as the light source are not in direct contact with the human eye, the design of the sensor can be improved and its commercial value can be increased. In particular, since the display is performed through the protective transmission means for protecting the detection means, the protection transmission means can be used for the two functions of protection of the detection means and transmission of the display light. Since there is no need to provide special means for illuminating, the sensor can be manufactured more simply and inexpensively. Further, since the detection means is an ultraviolet detection means and the protective transmission means is formed using a material containing a resin having ultraviolet absorptivity, the ultraviolet detection function by the detection means can be maintained.
Further, since the protective transmission means is arranged between the light source and the detection means, the ultraviolet detection function by the detection means can be maintained.

Further, according to the present invention , the planar shape of the protective transmission means is formed larger than the planar shape of the light source, and the light source is completely covered by the protective transmission means, so that the ultraviolet detection function by the detection means is maintained. it can.

It is a front view of the flame detector which concerns on Embodiment 1 of this invention. It is AA arrow sectional drawing of the flame detector of FIG. FIG. 3 is an enlarged view of a main part of FIG. 2. It is a block diagram of an electronic circuit. It is a perspective view of the periphery of UV Tron. 6 is a front view of a flame detector according to Embodiment 2. FIG. It is BB arrow sectional drawing of the flame detector of FIG.

  Hereinafter, embodiments of a display structure of a sensor according to the present invention will be described in detail with reference to the accompanying drawings. [I] First, the basic concept common to each embodiment was explained, then [II] the specific contents of each embodiment were explained, and [III] Finally, modifications to each embodiment were explained. To do. However, the present invention is not limited to each embodiment.

[I] Basic concept common to the embodiments First, the basic concept common to the embodiments will be described. The display structure of the sensor according to each embodiment is a display structure of the sensor that is installed in the monitoring area and detects a predetermined physical quantity. Although this monitoring area is arbitrary, for example, commercial facilities such as ordinary houses and retail stores can be cited. In addition, the physical quantity to be directly detected and the phenomenon to be monitored using this physical quantity are arbitrary. For example, the presence or absence of fire or flame is monitored by detecting infrared rays, ultraviolet rays, smoke, or heat. Alternatively, the presence or absence of an intruder is monitored by detecting infrared rays or heat. In the following description, a flame detector that monitors the presence or absence of a flame by detecting ultraviolet rays will be exemplified.

  One of the features of the display structure of the sensor is that the light source is not exposed directly to the outside of the housing and directly displayed, but the light source is not directly visible from the outside of the sensor. The light from the light source is transmitted through the protective transmission means to perform indirect display. That is, the light source is housed in the housing in an unexposed state, and the light emitted from the light source is emitted to the outside of the housing through the protective transmission means. For this reason, since only the detection means and the protective transmission means are in contact with the human eye and the display components are not in direct contact with the human eye, the design of the sensor can be improved and its commercial value can be increased. In particular, as the protective transmission means, a protection means that has been conventionally used is used to protect the detection means for detecting a physical quantity. Therefore, it is not necessary to provide a special means for guiding the display light, so that the sensor can be manufactured more simply and inexpensively.

[II] Specific contents of each embodiment [Embodiment 1]
Next, specific contents of each embodiment according to the present invention will be described. First, the first embodiment will be described. Here, after describing the outline of the configuration of the flame detector, the details of the display structure will be described. 1 is a front view of the flame detector according to the first embodiment, FIG. 2 is a cross-sectional view of the flame detector of FIG. 1 taken along the line AA, and FIG. 3 is an enlarged view of a main part of FIG. . In the following description, “planar” refers to a state viewed from the front of the flame detector. The flame detector 1 is generally configured by housing an electronic circuit 20 inside a housing 10.

(Outline of the configuration of the flame detector 1)
Among these, the housing | casing 10 is formed in the substantially square shape as a whole by combining the lower base 11 and the upper cover 12 mutually. The upper cover 12 includes a detection opening 12a for allowing ultraviolet rays in the monitoring area to be incident on the inside of the housing 10, and a buzzer for emitting the sound of a buzzer 47 described later to the outside of the housing 10. A hole 12b is formed.

  In addition, the electronic circuit 20 performs control for ultraviolet detection, display output, and the like. FIG. 4 is a block diagram of the electronic circuit 20. The electronic circuit 20 includes a terminal board 30 and a sensor board 40.

  Among these, the terminal board 30 is connected to various wirings (not shown) that reach the external device of the flame detector 1. This wiring includes, for example, a signal line for outputting a transmission signal at the time of flame detection, and a power line for receiving power supply by wire.

  The sensor board 40 includes a power supply unit 41, a CPU (Central Processing Unit) 42, a high voltage generation unit 43, a UV tron 44, a message output unit 45, a buzzer driving unit 46, a buzzer 47, a light emitting LED driving unit 48, A light emitting LED 49 is mounted. Among these, the power supply unit 41 supplies the CPU 42 with power supplied via the terminal board 30 or power supplied from a battery (not shown). The CPU 42 is a control means for controlling each part of the flame detector 1. When receiving power from the power supply unit 41, the CPU 42 outputs a lighting signal to the light emitting LED driving unit 48 to turn on the light emitting LED 49. Blink. In addition, the CPU 42 drives the high voltage generator 43 to apply a high voltage to the UV tron 44 and determines the presence or absence of flame based on the current output from the UV tron 44. Here, the UV tron 44 (ultraviolet photoelectric tube or UV tube) is for detecting ultraviolet rays in the monitoring region, and corresponds to the detection means in the claims. Details of the UV tron 44 will be described later. When the CPU 42 determines that there is a flame, the CPU 42 drives the message output unit 45 to output a message signal to a predetermined external device, and drives the buzzer drive unit 46 to output an alarm sound to the buzzer 47. Further, the light emitting LED 49 is caused to blink by outputting a blinking signal to the light emitting LED driving unit 48. Thus, the light emitting LED 49 emits light and corresponds to the light source in the claims. The light emitting LED driving unit 48 from the CPU 42 drives the light emitting LED 49 based on a signal from the CPU 42, and corresponds to the light source driving means in the claims.

  Next, the UV tron 44 will be described. FIG. 5 is a perspective view around the UV tron 44. As shown in FIGS. 3 and 5, the UV tron 44 is configured by accommodating a pair of an anode 44b and a cathode 44c and enclosing a gas inside a UV transmitting glass tube 44a that transmits ultraviolet rays. Then, when the ultraviolet rays radiated from the flame pass through the UV transmitting glass tube 44a and hit the surface of the cathode 44c, photoelectrons are emitted from the cathode 44c by the photoelectric effect, and when the photoelectrons move to the anode 44b, the enclosed gas And the sealed gas is ionized. When the sealed gas is ionized in this way, the anode 44b and the cathode 44c to which a high voltage is applied are in a discharge state, and a discharge current flows from the anode 44b to the cathode 44c. And the presence or absence of a flame can be determined based on this discharge current.

  Here, a transparent rubber 50 is disposed between the UV tron 44 and the sensor substrate 40. The transparent rubber 50 is disposed around the UV tron 44 to protect the UV tron 44, and transmits at least a part of the light emitted from the light emitting LED 49. It corresponds to the protective transmission means in the range. The permeable rubber 50 is formed in a substantially square shape as a whole, and a concave portion 50a substantially corresponding to the outer shape of the UV tron 44 is formed on the upper surface thereof. Then, by placing the UV tron 44 in the concave portion 50a, the UV tron 44 can be fixed in a state where the lower and side portions of the UV tron 44 are substantially covered with the permeable rubber 50, so that an impact or the like is applied. Even in this case, the impact is absorbed by the elasticity of the permeable rubber 50 and the UV tron 44 is protected. The transmissive rubber 50 is entirely transparent or semi-transparent with a transmissive resin, and transmits at least part of the light emitted from the light emitting LED 49.

(Details of transmission structure using transparent rubber 50)
Next, the transmission structure using the transparent rubber 50 will be described in more detail. As shown in FIG. 3, a light emitting LED 49 is mounted on the electronic circuit 20, a transparent rubber 50 is disposed above (on the left side in the drawing), and a UV tron 44 is placed on the transparent rubber 50. . Further, as shown in FIG. 1, the light emitting LED 49, the transmissive rubber 50, and the UV tron 44 are arranged at a planar position corresponding to the detection opening 12a. Therefore, the light emitted from the light emitting LED 49 is transmitted through the transmissive rubber 50 and emitted through the transmissive rubber 50. The light thus emitted is emitted from the periphery of the UV tron 44 to the outside of the housing 10 through the detection opening 12a. Therefore, the light emitted from the light emitting LED 49 can be emitted to the outside of the flame detector 1, and an alarm or the like can be given when a flame is detected.

  Here, since the planar shape of the transmissive rubber 50 is larger than the planar shape of the light emitting LED 49, the light emitting LED 49 is completely covered by the transmissive rubber 50 when viewed from the front direction as shown in FIG. The LED 49 is not directly exposed to the outside from the detection opening 12a. Thus, since the light emitting LED 49 which is the light emitting means is not exposed to the outside, the design of the flame detector 1 can be improved without giving a sense of discomfort to the surroundings.

  Further, in the first embodiment, a device for uniformly emitting light from the light emitting LED 49 is provided. That is, as long as the light of the light emitting LED 49 is simply transmitted through the transmissive rubber 50, the light emitting LED 49 may be disposed at any position as long as the light of the light emitting LED 49 can enter the transmissive rubber 50. For example, the light emitting LED 49 may be disposed in the vicinity of one side surface of the transmissive rubber 50. However, in such a case, when viewed in a plan view, light emitted from the light emitting LED 49 is strongly incident only on a part of the transmissive rubber 50 and is emitted to the outside of the housing 10 through the transmissive rubber 50. Becomes non-uniform in plan view. For this reason, in the first embodiment, the light emitting LED 49 is positioned at the position facing the UV tron 44 with the transmissive rubber 50 as the center (position on the bottom side of the transmissive rubber 50), and the transmissive rubber 50. Are arranged at positions corresponding to substantially the center position in the plane direction. For this reason, when viewed in plan, the light of the light emitting LED 49 is most strongly incident on the substantially central position of the bottom of the transmissive rubber 50, diffuses substantially uniformly around the transmissive rubber 50, and then is emitted to the outside. Therefore, the light of the light emitting LED 49 can be emitted substantially uniformly.

  In the first embodiment, the UV transmissive glass tube 44a of the UV tron 44 is formed to be transparent. Accordingly, the light emitted from the light emitting LED 49 that has passed through the transmissive rubber 50 transmits not only around the UV tron 44 but also through the UV transmissive glass tube 44 a of the UV tron 44, and from the detection opening 12 a to the outside of the housing 10. Released. Therefore, more light can be emitted to the outside of the housing 10, and display efficiency and display effect can be improved.

  Further, the material of the transparent rubber 50 of the first embodiment is devised so that the light of the light emitting LED 49 does not adversely affect the ultraviolet detection by the UV tron 44. That is, when the light emitted from the light emitting LED 49 contains ultraviolet rays, the ultraviolet rays may enter the UV tron 44 and adversely affect the UV detection of the monitoring area by the UV tron 44. In order to prevent such a situation, the permeable rubber 50 has a functionality that is contained in a resin having an ultraviolet absorptivity, for example, a resin containing an ultraviolet absorber such as 2-ethylhexyl paramethoxycinnamate (octyl). It is formed using resin. Alternatively, by using an LED that emits only light in a non-ultraviolet region (for example, only a visible light component) as the light emitting LED 49, the ultraviolet absorptivity in the transmissive rubber 50 can be omitted. Further, considering that a high voltage is applied to the UV tron 44, it is preferable to use a highly insulating material for the transparent rubber 50.

(Details of light emission driving of the light emitting LED 49)
Next, light emission driving of the light emitting LED 49 by the light emitting LED driving unit 48 will be described in more detail. The light emitting LED driving unit 48 of FIG. 5 turns on the light emitting LED 49 by continuously supplying current and voltage to the light emitting LED 49 based on the lighting signal from the CPU 42 at the time of normal monitoring. The light emitting LED 49 is caused to blink by intermittently supplying current and voltage to the light emitting LED 49 based on the blinking signal.

  Here, when the light emitting LED 49 is turned on during normal monitoring, the light emitting LED drive unit 48 supplies the light emitting LED 49 to the light emitting LED 49 so that the luminance of the light emitted from the light emitting LED 49 changes at 1 / f according to the fluctuation theory. The current to be changed is changed. Such current control can be performed by an arbitrary method. For example, the current can be controlled using a PWM (Pulse Width Modulation) method. As a result, the light emitted through the transmissive rubber 50 can be fluctuated at 1 / f, and a comfortable display for the user can be performed. In particular, a comfortable display is achieved by emitting light at 1 / f only during normal monitoring, and an eye-catching display is provided by flashing light emission not at 1 / f when a flame is detected. The effect can be enhanced.

  As described above, according to the first embodiment, since the light emitting LED 49 is not exposed to the outside, the design of the flame detector 1 can be improved without giving a sense of discomfort to the surroundings. Further, since the light emitted from the light emitting LED 49 is diffused substantially uniformly around the transparent rubber 50 and then emitted to the outside, the light emitted from the light emitting LED 49 can be emitted substantially uniformly. Moreover, display efficiency and a display effect can be improved by transmitting the light of the light emitting LED 49 through the UV transmission glass tube 44a. Further, when the light emitted from the light emitting LED 49 contains ultraviolet light, the ultraviolet ray absorbing function can be provided to the transmissive rubber 50, or the light emitting LED 49 can maintain only the light in the non-ultraviolet region. By using the LED that emits light, the ultraviolet absorptivity in the transmissive rubber 50 can be omitted. Furthermore, the light emitted through the transmissive rubber 50 can be fluctuated at 1 / f, and a comfortable display for the user can be performed. In particular, when a flame is detected, a flashing light emission that does not depend on 1 / f can be performed to display an eye-catching display, thereby enhancing the alarm effect of the flame detector.

[Embodiment 2]
Next, the specific content of Embodiment 2 which concerns on this invention is demonstrated. In the second embodiment, a permeable rubber is extended to the outer surface of the casing. 6 is a front view of the flame sensor according to the second embodiment, and FIG. 7 is a cross-sectional view of the flame sensor of FIG. The configuration of the second embodiment is substantially the same as the configuration of the first embodiment except where otherwise specified, and the same configuration as that of the first embodiment is used in the first embodiment. The same reference numerals are attached as necessary, and the description thereof is omitted.

(Overview of flame detector configuration)
The flame detector 2 is generally configured by housing a UV tron 44, a transmissive rubber 60, and an electronic circuit 20 inside a housing 10. Here, the permeable rubber 60 is extended to the outer surface of the housing 10 from the base 61 through the periphery of the UV tron 44 and the base 61 disposed between the UV tron 44 and the sensor substrate 40. The rising portion 62 is integrally provided. The rising portion 62 is exposed to the outside of the casing 10 through the periphery of the detection opening 12 a formed in the casing 10, and is substantially flush with the outer surface of the casing 10. .

(Details of transmission structure using transparent rubber)
According to such a configuration, the light emitted from the light emitting LED 49 enters the base 61 of the transmissive rubber 60, is guided from the base 61 to the rising portion 62, and the housing is connected via the rising portion 62. Released directly to the outside of the body 10. Therefore, the light emitted from the light emitting LED 49 can be directly emitted to the outside of the flame detector 2 through the transmissive rubber 60, and more effective display can be performed as compared with the first embodiment. In particular, the light-emitting LED 49 is not exposed from the housing 10 as in the conventional case, but the elastic transparent rubber 60 is exposed from the housing 10 and light is emitted substantially uniformly from the entire transparent rubber 60. Therefore, a softer impression than the conventional display means can be given, and the design of the flame detector 2 can be enhanced.

  As described above, according to the second embodiment, a more effective display can be performed as compared with the first embodiment. Moreover, a softer impression than the conventional display means can be given and the design of the flame detector 2 can be enhanced.

[III] Modifications to Embodiments Although the embodiments of the present invention have been described above, the specific configuration and means of the present invention are within the scope of the technical idea of each invention described in the claims. Can be arbitrarily modified and improved. Hereinafter, such a modification will be described.

(About problems to be solved and effects of the invention)
First, the problems to be solved by the invention and the effects of the invention are not limited to the above-described contents, and the present invention solves the problems not described above or has the effects not described above. There are also cases where only some of the described problems are solved or only some of the described effects are achieved. For example, even if the display opening or a part of the light source is exposed to the outside of the sensor, as long as the degree of exposure can be reduced as compared with the conventional case, The problem has been solved.

(About light source)
As the light source, any light source including a laser semiconductor and a small liquid crystal panel can be used in addition to the light emitting LED 49 described above. The light source is not limited to one, and a plurality of light sources may be arranged. For example, a plurality of light sources having different display colors may be arranged on the side and bottom surfaces of the protective transmission means, and the display colors may be switched according to the state of the sensor. Further, as a configuration for disposing the light source so as not to be visible from the outside of the sensor, a dedicated means for covering the light source can be provided in addition to covering with the protective transmission means.

(Protective transmission means)
The protective transmission means can be formed of any material other than resin. Further, it is not necessary to provide the entire protective transmission means with translucency, and the protective transmission means may be configured by combining a translucent member and a non-translucent member. Further, the light transmitted through the protective transmission means may be emitted to the outside of the housing through an opening other than for detection. In addition, not all of the light emitted from the light source but only part of it is transmitted through the protective transmission means and guided to the outside of the housing, and other light is directly passed through the opening as in the conventional case. You may discharge | release to the exterior of a housing | casing.

  The display structure of the sensor according to the present invention is applied to various sensors such as a flame sensor and a smoke sensor, and improves the design and commercial value of the sensor by making the display structure inconspicuous from the overview. It is useful to make it.

(Appendix)
The display structure of the sensor according to appendix 1 is a display structure in a sensor that detects a predetermined physical quantity in a monitoring region, and a detector that detects the physical quantity and emits light, A light source arranged so as not to be directly visible from the outside of the sensor, and arranged around the detection means to protect the detection means, and at least a part of the light emitted from the light source And a protective transmission means that transmits the light.

  Further, the sensor display structure according to appendix 2 is the sensor display structure according to appendix 1, wherein a detection opening for detecting the physical quantity is provided in a housing that houses the detection means and the light source. The light emitted from the light source and transmitted through the protective transmission means can be emitted to the outside of the casing through the detection opening.

  Further, the sensor display structure according to appendix 3 is the sensor display structure according to appendix 1 or 2, wherein at least a part of the protective transmission means is provided in a housing that houses the detection means and the light source. It is exposed outside.

  The sensor display structure according to appendix 4 is the sensor display structure according to any one of appendices 1 to 3, wherein the detection means is emitted from the light source and passes through the protective transmission means. Further, it is possible to further transmit at least part of the obtained light.

  Further, the sensor display structure according to appendix 5 is the sensor display structure according to any one of appendices 1 to 4, wherein the detection means detects ultraviolet rays in the monitoring area. The protective transmission means is an ultraviolet absorption means capable of absorbing ultraviolet rays contained in light emitted from the light source.

  Further, the sensor display structure according to appendix 6 is the sensor display structure according to any one of appendices 1 to 4, wherein the detection means detects ultraviolet rays in the monitoring area. The light source emits only light in a non-ultraviolet region.

  The sensor display structure according to appendix 7 is the sensor display structure according to any one of appendices 1 to 6, wherein the light source faces the detection means with the protective transmission means as a center. It is a position, It is arrange | positioned in the position corresponding to the approximate center position of the planar direction in the said protection permeation | transmission means, It is characterized by the above-mentioned.

The display structure of the sensor according to appendix 8 is the display structure of the sensor according to any one of appendices 1 to 7, further comprising light source driving means for driving the light source, thereby fluctuations change the luminance of light emitted from the light source at 1 / f, characterized by.

  The display structure of the sensor according to the supplementary note prevents the light source from being directly visible from the outside of the sensor, while transmitting the light from the light source through the protective transmission means. Since only the transmitting means is touched by human eyes and display components such as a light source are not directly touched by human eyes, the design of the sensor can be improved and its commercial value can be increased. In particular, since the display is performed through the protective transmission means for protecting the detection means, the protection transmission means can be used for the two functions of protection of the detection means and transmission of the display light. Since there is no need to provide special means for illuminating, the sensor can be manufactured more simply and inexpensively.

  In addition, since the sensor display structure according to the supplementary note allows light to be emitted through a detection opening for detecting a physical quantity, the display opening can be omitted, and the design of the sensor Can improve the product value.

  In addition, the display structure of the sensor according to the supplementary note exposes a part of the protective transmission means to the outside of the housing, so that the light of the light source can be emitted directly to the outside of the sensor through the protective transmission means. More effective display can be performed. In particular, by forming the protective transmission means with resin or the like, it is possible to give a softer impression than the conventional display means, and the design of the sensor can be enhanced.

  In addition, the sensor display structure according to the supplementary note allows light from the light source to be transmitted through the detection means, so that the light can be emitted to the outside without being blocked by the detection means, thereby further improving display efficiency and display effect. it can.

  In the sensor display structure according to the supplementary note, since the detection means is an ultraviolet detection means and the protective transmission means is an ultraviolet absorption means, the ultraviolet detection function by the detection means can be maintained.

  Further, in the sensor display structure according to the supplementary note, since the detection means is an ultraviolet detection means, and the light source emits only light in a non-ultraviolet region, the ultraviolet ray in the transmissive rubber is maintained while maintaining the ultraviolet detection function by the detection means. Absorbability can be omitted.

  Further, in the sensor display structure according to the supplementary note, the light source is disposed at a position facing the detection means with the protective transmission means as the center and corresponding to the substantially central position of the protective transmission means. Is diffused substantially uniformly around the protective transmission means and then emitted to the outside, so that the light from the light source can be emitted substantially uniformly.

  Further, the display structure of the sensor according to the supplementary note can perform a comfortable display for the user by changing the luminance of the light emitted from the light source by 1 / f. In particular, 1 / f is displayed only during normal monitoring, and when an abnormality occurs such as when a flame is detected, a flashing light emission that does not depend on 1 / f is performed to give a noticeable display. Can be increased.

DESCRIPTION OF SYMBOLS 1, 2 Flame detector 10 Case 11 Lower base 12 Upper cover 12a Detection opening 12b Buzzer hole 20 Electronic circuit 30 Terminal board 40 Sensor board 41 Power supply part 42 CPU
43 High Voltage Generation Unit 44 UV Tron 44a UV Transmission Glass Tube 45 Transfer Output Unit 46 Buzzer Drive Unit 47 Buzzer 48 Light-Emitting LED Drive Unit 49 Light-Emitting LED
50 Permeable rubber 50a Recess

Claims (2)

A display structure in a sensor for detecting a predetermined physical quantity in a monitoring area,
Detection means for detecting the physical quantity;
A light source that emits light and is arranged to be invisible directly from the outside of the sensor;
A protective transmission means that is disposed around the detection means and protects the detection means, and transmits at least part of the light emitted from the light source,
The detection means is ultraviolet detection means for detecting ultraviolet light in the monitoring area,
The protective transmission means is formed using a material containing a resin having ultraviolet absorptivity ,
Disposing the protective transmission means between the light source and the detection means;
Sensor display structure characterized by Forming the planar shape of the protective transmission means larger than the planar shape of the light source, and completely covering the light source by the protective transmission means;
The display structure of the sensor according to claim 1.

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