JP2002373506A - Night-light - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a night-light, which can enlarge the spread angle of an illuminating range. SOLUTION: The circuit board, which is mounted with two or more light emitting diodes 2, is contained in the lower part of an instrument main part 1. A lens cover 30, which forms some part of the instrument main parts 1, and covers two or more light emitting diodes 2, is arranged in the lower part of the instrument main part 1. Two or more the light emitting diodes 2 are arranged along with the lens cover 30. Two or more the light emitting diodes 2 have arranged so that their light emitting faces may gather on an imaginary convex curved surface, which is swelled to the outside, and may have set up to have the larger opening angles of light axis the father they separate from a central line greatly by making a normal line passing on the point of the imaginary convex curved surface as the central line of a luminous intensity distribution. That is, the two or more light emitting diodes 2 are mounted on the circuit board 50 so that they may have the larger angle, which is formed by the central line and the light axis, the farther they have separated from the central line.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a night light which is arranged on a wall such as a corridor or a stair so as to illuminate a foot at night or the like.

[0002]

2. Description of the Related Art Conventionally, there has been provided a luminaire called a night light which is arranged below a wall facing a corridor or the like so as to illuminate a foot. As this type of night light, for example, as shown in FIG. 13, a rectangular parallelepiped appliance body 1 'in which a plurality of (six in the illustrated example) light emitting diodes 2 for auxiliary lighting are housed, and a plurality of light emitting diodes Diode 2
Lens cover 3 which covers the lens and forms a part of the instrument body 1 '
0 'is provided. put it here,
The plurality of light emitting diodes 2 are arranged on a straight line in the left-right direction at the lower part of the device main body 1 'in FIG. 13, and the direction of the optical axis of each light emitting diode 2 is set as shown in FIG. An illumination range is obtained. In the example shown in FIG. 13, three light emitting diodes 2 arranged on the left side of a center line B ′ along the vertical direction of the appliance main body 1 ′ are connected to each other by the optical axes of the adjacent light emitting diodes 2. It is mounted on a circuit board (not shown) so that the angle formed is 10 °. In addition, three light emitting diodes 2 arranged on the right side of the center line B ′ are mounted such that the angle between the optical axes of the adjacent light emitting diodes 2 is 10 °. The two light emitting diodes 2 closest to the center line B 'are mounted on the circuit board so that their optical axes are parallel to each other.

[0003]

However, in the above-mentioned conventional night light, a plurality of light emitting diodes 2 are provided.
Are arranged in a straight line, so that if the illumination range of the light emitted by the light emitting diodes 2 is to be widened, the number of the light emitting diodes 2 must be increased, which increases the cost and increases the size of the appliance body 1 ′. There was a problem of inviting. Here, it is conceivable to widen the illumination range by changing the direction of the optical axis of the light emitting diodes 2 without increasing the number of the light emitting diodes 2, but in this case, uneven brightness occurs within the illumination range. There was a problem of getting it.

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a night light capable of increasing a spread angle of an illumination range without increasing the number of light emitting diodes as compared with the related art. Is to do.

[0005]

According to the first aspect of the present invention, in order to achieve the above object, a plurality of light emitting diodes for auxiliary lighting are arranged and mounted so as to form a desired illumination range. A circuit board, an appliance body in which the circuit board is stored, and a lens cover that covers the plurality of light emitting diodes and forms a part of the appliance body, wherein the plurality of light emitting diodes are provided outside the appliance body. The emission surface is arranged so as to be aligned on the bulging virtual convex curved surface, and the angle of opening of the optical axis with respect to the center line increases with increasing distance from the center line as the normal line passing through a point on the convex curved surface as the center line of light distribution. This is characterized in that it is enlarged, and the spread angle of the illumination range can be increased without increasing the number of light-emitting diodes as compared with the related art.

According to a second aspect of the present invention, in the first aspect of the present invention, a power supply blade which can be plugged into an outlet of a commercial power supply is provided on the back side of the instrument body, so that the blade is inserted into the outlet of the commercial power supply. Therefore, power is supplied and installed, which facilitates installation and removal.

According to a third aspect of the present invention, in the first or the second aspect of the present invention, the illumination range adjusting cover formed by the lens cover and capable of adjusting the illumination range is mounted on the instrument body. Since the illumination range can be adjusted by the range adjustment cover, the illumination range can be appropriately adjusted according to the installation location, and the increase in manufacturing cost due to the change in the illumination range is reduced.

According to a fourth aspect of the present invention, in the first to third aspects of the present invention, a height is provided between the circuit board and each of the light emitting diodes to make the distance between the circuit board and each of the light emitting diodes uniform. Since the height adjustment spacer has an insertion hole through which the lead of each light emitting diode is inserted, the lead of each light emitting diode is inserted through the insertion hole of the height adjustment spacer. Then, by soldering to the circuit board, the distance between the circuit board and each of the light emitting diodes will be uniform, and the distance between the circuit board and each of the light emitting diodes can be easily made uniform, Assembly work becomes easier.

According to a fifth aspect of the present invention, in the first to fourth aspects of the present invention, a brightness sensor for detecting the ambient illuminance, and each of the light emitting diodes when the ambient illuminance detected by the brightness sensor becomes a specified value or less. Control means for turning on the light emitting diode, it is possible to prevent each of the light emitting diodes from being turned on when the surroundings are bright, it is possible to suppress unnecessary power consumption, and when the surroundings are dark,
Since each of the light emitting diodes is automatically turned on, convenience is improved.

According to a sixth aspect of the present invention, in the first to fourth aspects, a brightness sensor for detecting ambient illuminance, a human sensor for detecting the presence or absence of a person in the detection area,
When the presence of a person in the detection area is detected by the human sensor when the ambient illuminance detected by the brightness sensor is equal to or less than the specified value, each of the light-emitting diodes is turned on. Since it is provided with control means for turning off each of the light emitting diodes later, when a person is detected when the surroundings are dark, each of the light emitting diodes is turned on, and when no person is detected, the light emitting diodes are turned off after a certain time period, which is convenient. Efficiency and wasteful power consumption can be suppressed.

[0011]

(Embodiment 1) A night light according to the present embodiment will be described with reference to FIGS. In the following, the vertical direction is defined using the vertical direction in FIG. 1, the left side in FIG.
The right side in FIG.

The main body 1 of the night light according to the present embodiment.
Is a box-shaped synthetic resin body 10 with an open front,
The body 10 covers most of the opening of the body 10.
And a lens cover 30 disposed to cover a portion of the opening of the body 10 that is not covered by the cover 20. That is, the lens cover 30 is formed of a synthetic resin having a light-transmitting property, and forms a part of the lower part of the instrument body 1. In addition, the outer shape of the body 10 connects the upper ends of two straight lines separated in the left-right direction by a curved curve such that the central portion is convex above the peripheral portion, and the lower ends are closer to the central portion than the peripheral portion. It is formed in a shape connected by a curved curve so as to be convex downward. That is, the appliance body 1 is formed in such a shape that the width in the up-down direction gradually decreases as the distance from the center line B of the appliance body 1 in the up-down direction increases. Further, the cover 20 has a rounded portion formed on the periphery.

The body 10 has a rectangular exposure window 12 opened in the center of the upper half of the back wall, and is used for power supply that can be inserted into an outlet of a commercial power outlet installed on the wall or the like. A blade block 40 provided with a pair of blades 42 is mounted. Here, the blade 40 is a blade 4
2 and 42 are mounted so as to be exposed from the back surface of the body 10 and to be rotatable with respect to the body 10.
The blade block 40 includes a movable body 41 made of a synthetic resin formed in a semi-cylindrical shape, and a pair of shaft pins 43, 43 protruding from both side surfaces of the movable body 41.
A pair of U-shaped guide ribs 13, 1 formed on the periphery of
3. On the guide rib 13,
A guide groove 13a for guiding the shaft pin 43 is formed.
That is, the blade block 40 can rotate around the shaft pins 43, 43, and can change the direction of the movable body 41 with respect to the body 10.

The bases of the pair of blades 42 are connected to both side surfaces of the movable body 41. Further, the body 10 has base portions 15, 15 protruding adjacent to and above the respective guide ribs 13, 13. Each stand 15, 1
5 is formed with a retractable groove 15a capable of retracting the plug blades 42, 42 in a form opened to the back side. Here, the escape groove 15a is formed along the up-down direction of the appliance body 1, and is opened on both sides in the up-down direction, the lower end side communicates with the exposure window 12, and the upper end side is formed in the recess 1 formed on the back surface of the body 10.
It communicates with 6.

The movable body 41 is held by the holding plate 60 with the respective shaft pins 43, 43 inserted along the guide grooves 13a, 13a to predetermined positions of the guide ribs 13, 13.
0. Bosses 17, 17 protrude from the body 10 in the left-right direction adjacent to the guide ribs 13, 13, and the bosses 17, 17 are formed with screw holes 17a, 17a into which mounting screws 81, 81 are screwed. ing. On the other hand, the holding plate 60 is formed in a rectangular shape, and mounting pieces 61, 61 are protrudingly provided at lower ends of both right and left side edges, and mounting screws 81, 81 are inserted into the mounting pieces 61, 61. Insertion holes 61a, 61a are formed. Therefore, by screwing the mounting screws 81, 81 into the screw holes 17a, 17a through the insertion holes 61a, 61a, the pressing plate 6
0 is connected to the body 10. The holding plate 6
0, a shaft pin 4 is provided on the surface facing the bottom surface of the body 10.
A support piece 62 having a holding groove 62a into which the blade 3 is inserted protrudes, and the blade block 40 is held so as to be rotatable. In addition, each plug blade 42, 42
In the state in which the blades are retracted to the positions a and 15a, the distal ends of the blades 42 are retracted into the recesses 16, so that the distal ends of the blades 42 can be touched with a finger. Each of the blades 42 can be easily rotated to a position orthogonal to the back wall of the body 10.

A plurality of (six in the present embodiment) light emitting diodes 2 and a human sensor 3 for detecting presence or absence of a person in a detection area with a heat ray sensor comprising a pyroelectric element are provided in the instrument body 1. And a circuit board 50 composed of a printed circuit board on which a brightness sensor 4 made of CdS for detecting ambient illuminance is mounted, and light receiving surfaces of the human sensor 3 and the brightness sensor 4 (upper surface in FIG. 2). On the side, a lens block 70 having a holding frame 72 holding a light receiving lens (not shown) and a protective cover 71 that protects the light receiving lens by bending the central portion in the left-right direction beyond both end portions. It is provided so as to cover the sense sensor 3 and the brightness sensor 4.

On the front surface of the cover 20, a recess 22 having an opening window 23 for exposing a part of the protection cover 71 is formed at a position corresponding to the protection cover 71, and the upper and lower peripheral edges of the opening window 23 are formed. Are formed with holding pieces 24 that respectively overlap the upper and lower parts of the protective cover 71. Therefore, the heat rays enter the heat sensor of the human sensor 3 through the protective cover 71 and the light receiving lens. The protective cover 71 and the light receiving lens are made of high-density polyethylene resin so that infrared rays can easily pass therethrough. The circuit board 50 and the pair of blades 42, 42
Means two connection plates 58a and 58b made of a conductive material.
Are electrically connected to each other. Each connection plate 58a, 58
b is formed in an L-shape, and one end of the circuit board 50
And the other end is connected to the blades 42, 42.

The above-mentioned plurality of light emitting diodes 2 are arranged on the lower front side of the circuit board 50, and the leads 2b are soldered on the rear side of the circuit board 50. That is, the light emitting surface of the plurality of light emitting diodes 2
It comes to face. Therefore, for example, when inserting the plug blade 42 into the outlet of the outlet installed on the wall surface or the like, if the apparatus main body 1 is installed with the lens cover 30 facing down, the human sensor can be used in darkness such as at night. When the person 3 is detected, the light emitting diode 2 is automatically turned on, and the floor surface can be illuminated by the light of the light emitting diode 2, so that the brightness at the foot can be ensured.

On the front surface of the circuit board 50, a separating spacer 56 for separating a space in which the plurality of light emitting diodes 2 are provided and a space in which other circuit components are provided in the apparatus main body 1 is provided. Standing forward. The separation spacer 56 is formed of a material having a light-shielding property, and has a function as a reflector for reflecting light of the light-emitting diode 2. Therefore, it is possible to prevent the light of the light emitting diode 2 from entering the brightness sensor 4.

A circuit as shown in FIG. 5 is formed on the circuit board 50 described above. That is, on the circuit board 50, in addition to the plurality of light emitting diodes 2, the human sensor 3, and the brightness sensor 4, the lighting circuit 5 for simultaneously lighting the plurality of light emitting diodes 2, and the pair of plug blades 42 are used. A first power supply circuit 6 connected to an AC power supply Vs composed of a commercial power supply to generate an operating power supply for the lighting circuit 5 from the AC power supply Vs, and the lighting circuit 5 based on the outputs of the human sensor 3 and the brightness sensor 4 A control circuit 7 for controlling the control circuit 7 connected to the AC power supply Vs via the pair of blades 42
And a circuit component such as a second power supply circuit 8 for generating an operation power supply. Here, when the human body detection output is input from the human sensor 3, the control circuit 7 determines that the ambient illuminance detected by the brightness sensor 4 is equal to or less than a specified value (that is, the periphery of the appliance body 1 is dark). ), The lighting circuit 5 is controlled so that each light emitting diode 2 is turned on, and when the human body detection output of the human sensor 3 is stopped, the light emitting diode 2 is turned off after a certain time period set in advance by a time constant circuit. The lighting circuit 5 is controlled so as to be turned off. Each of the power supply circuits 6, 8 is supplied with power from the AC power supply Vs by inserting the plug blade 42 into an outlet of an outlet installed on a wall or the like.

Therefore, it is possible to prevent each light emitting diode 2 from lighting when the surroundings are bright, to suppress unnecessary power consumption, and further, when a person is detected when the surroundings are dark, When the light-emitting diode 2 is turned on and no person is detected, the light-emitting diode 2 is turned off after a certain period of time, so that wasteful power consumption can be suppressed and convenience is improved. In the present embodiment, the control means is constituted by the control circuit 7 and the lighting circuit 5. In this embodiment, the human sensor 3 is provided.
May be provided, and the control circuit 7 may control the lighting circuit 5 based on the output of the brightness sensor 4. In this case, the ambient illuminance detected by the brightness sensor 4 is equal to or less than a specified value. Each light emitting diode 2 is lit only during the period.

Incidentally, the above-mentioned lens cover 30 is formed in a curved surface shape bulging outward. Further, the plurality of light emitting diodes 2 described above are arranged along the lens cover 30 as shown in FIG. That is, the plurality of light-emitting diodes 2 are arranged so that the emission surfaces are aligned on a virtual convex surface bulging outwardly of the instrument body 1, and a normal line passing through a point on the convex surface is used for light distribution. The feature is that as the center line (hereinafter, referred to as a reference line) is farther from the reference line, the opening angle of the optical axis with respect to the reference line is set larger. Here, the reference line is in the front-rear direction of the appliance body 1,
The light emitting diodes 2 in this embodiment are set so as to overlap with the center line B along the vertical direction of the device main body 1, and the angle between the reference line and the optical axis increases as the distance from the reference line increases. Mounted on the circuit board 50 as described above. In the example shown in FIG. 1, the angle between each optical axis of each of the leftmost and rightmost light emitting diodes 2 and the above-mentioned reference line is 25 °, and the second light emitting diode 2 from the left and the second light emitting diode 2 from the right. The angle between each optical axis and the reference line is 15 °, and the angle between each optical axis of the remaining two light emitting diodes and the reference line is 5 °. Note that the plurality of light emitting diodes 2 are arranged on one arc.

Thus, in the present embodiment, the divergence angle of the illumination range can be increased without increasing the number of light emitting diodes 2 as compared with the related art. That is, in the present embodiment, it is possible to realize a fan-shaped illumination range having a large spread angle. Moreover, even if the spread angle of the illumination range is increased without increasing the number of light emitting diodes 2 as compared with the related art, it is possible to suppress the occurrence of uneven brightness in the illumination range.

(Embodiment 2) The basic configuration of the night light of this embodiment is substantially the same as that of Embodiment 1, and the illumination range formed by the lens cover 30 can be adjusted as shown in FIGS. It is characterized in that two lens hoods 90, 90 are mounted on the instrument body 1 as a cover for adjusting the illumination range. Each of the lens hoods 90 is formed of a material having a light-shielding property. Embodiment 1
The same components as those described above are denoted by the same reference numerals, and description thereof is omitted.

By the way, each lens hood 90, 90
The lens cover 30 is formed so as to be slidable along the front surface thereof, and is disposed on the front surface side of the lens cover 30 so as to overlap a part of the lens cover 30. That is, the left lens hood 90 is indicated by an arrow A in FIG.
The lens hood 90 on the right side is attached to the instrument body 1 so as to be slidable in the direction of arrow A2 in FIG. In addition, the tool main body 1 has a 9
2 is held between the lens cover 30 and the cover 20.

The right and left lens hoods 90 and 90 respectively have knobs 91 and 91 projecting outward from the right end of the lens hood 90 and the left end of the right lens hood 90, respectively.
1 can be slid to a desired position by operating the button 1.

The illumination range cannot be changed with the night light having the conventional configuration shown in FIG. 13 and the night light according to the first embodiment.
Since the two lens hoods 90, 90 are slidably mounted on the front side of the apparatus main body 1, the illumination range can be adjusted by sliding the lens hoods 90, 90 along the lens cover 30. Therefore, the illumination range can be appropriately adjusted according to the installation location, and the increase in manufacturing cost due to the change in the illumination range is reduced.

(Embodiment 3) The basic configuration of a night light according to the present embodiment is substantially the same as that of Embodiment 2 and, as shown in FIGS. 10 to 12, between a circuit board 50 and each light emitting diode 2. Interposed circuit board 50 and each light emitting diode 2
Is characterized in that a height adjusting spacer 57 is provided to make the distance between them uniform. Here, two leads 2 of each light emitting diode 2 are provided on the height adjusting spacer 57.
Insertion holes (not shown) through which the holes b and 2b (see FIG. 6) are inserted are formed. The height adjusting spacer 57 is continuously and integrally protruded from the rear end edge of the separating spacer 56. The same components as those in the first and second embodiments are denoted by the same reference numerals, and description thereof will be omitted.

By the way, in the night lights of the first and second embodiments, in order to align the light emitting surface of each light emitting diode 2 on the above-mentioned convex curved surface, when mounting each light emitting diode 2 on the circuit board 50, It is necessary to make the protrusion amounts of the leads 2b of each light emitting diode 2 uniform, which is troublesome. However, in the present embodiment, the circuit board 50 and each light emitting diode are interposed between the circuit board 50 and each light emitting diode 2. Since the height adjusting spacer 57 for adjusting the distance between the light emitting diodes 2 is formed, and the height adjusting spacer 57 has an insertion hole through which the lead 2b of each light emitting diode 2 is inserted.
By inserting the lead 2b of each light emitting diode 2 into the insertion hole of the height adjusting spacer 57 and soldering it to the circuit board 50, the distance between the circuit board 50 and each light emitting diode 2 becomes uniform. The distance between the substrate 50 and each of the light emitting diodes 2 can be easily made uniform, and the assembling work becomes easy.

[0030]

According to the first aspect of the present invention, there is provided a circuit board on which a plurality of light emitting diodes for auxiliary lighting are arranged and mounted so as to form a desired illumination range, and an apparatus body containing the circuit board. And a lens cover that covers the plurality of light-emitting diodes and forms a part of the appliance body, and the plurality of light-emitting diodes are aligned on an imaginary convex curved surface bulging outward from the appliance body. Arranged in such a manner, the angle of opening of the optical axis with respect to the center line increases as the distance from the center line increases as the normal line passing through the point on the convex curved surface as the center line of the light distribution. There is an effect that the spread angle of the illumination range can be increased without increasing the number of light emitting diodes.

According to a second aspect of the present invention, in the first aspect of the present invention, a power supply blade which can be plugged into a commercial power outlet is provided on the back side of the instrument main body. As a result, power is supplied and installed, so that installation and removal are facilitated.

According to a third aspect of the present invention, in the first or second aspect of the present invention, the illumination range adjusting cover formed by the lens cover and capable of adjusting the illumination range is mounted on the instrument body. Since the illumination range can be adjusted by the range adjustment cover, the illumination range can be appropriately adjusted according to the installation location, and the increase in manufacturing costs due to the change in the illumination range is reduced. .

According to a fourth aspect of the present invention, in accordance with the first to third aspects of the present invention, a height is provided between the circuit board and each of the light emitting diodes to make the distance between the circuit board and each of the light emitting diodes uniform. Since the height adjustment spacer has an insertion hole through which the lead of each light emitting diode is inserted, the lead of each light emitting diode is inserted through the insertion hole of the height adjustment spacer. Then, by soldering to the circuit board, the distance between the circuit board and each of the light emitting diodes will be uniform, and the distance between the circuit board and each of the light emitting diodes can be easily made uniform, There is an effect that the assembling work is facilitated.

According to a fifth aspect of the present invention, in the first to fourth aspects of the present invention, a brightness sensor for detecting the ambient illuminance, and each of the light emitting diodes when the ambient illuminance detected by the brightness sensor becomes a specified value or less. Control means for turning on the light emitting diode, it is possible to prevent each of the light emitting diodes from being turned on when the surroundings are bright, it is possible to suppress unnecessary power consumption, and when the surroundings are dark,
Since each of the light emitting diodes is automatically turned on, there is an effect that convenience is improved.

According to a sixth aspect of the present invention, in the first to fourth aspects, a brightness sensor for detecting ambient illuminance, a human sensor for detecting the presence or absence of a person in the detection area,
When the presence of a person in the detection area is detected by the human sensor when the ambient illuminance detected by the brightness sensor is equal to or less than the specified value, each of the light-emitting diodes is turned on. Control means for turning off each of the light emitting diodes later is provided, so that when a person is detected when the surroundings are dark, each of the light emitting diodes is turned on, and when no person is detected, the light emitting diodes are turned off after a fixed time period. This has the effect of improving the performance and suppressing unnecessary power consumption.

[Brief description of the drawings]

FIG. 1 is a front view showing a first embodiment.

FIG. 2 is an exploded perspective view of the same.

3A and 3B show the same as above, wherein FIG. 3A is a front view, FIG. 3B is a right side view, and FIG. 3C is a plan view.

FIG. 4 is a rear view of the above.

FIG. 5 is a circuit diagram of the same.

FIG. 6 is an exploded perspective view showing the second embodiment.

7A and 7B show the same as above, wherein FIG. 7A is a front view and FIG. 7B is a right side view.

FIG. 8 is a front view showing the same as above, with a cover and the like removed.

FIG. 9 is a bottom view showing the same as above, with a cover and the like removed.

FIG. 10 is an exploded perspective view showing a third embodiment.

FIG. 11 is a front view of a main part of the above.

FIG. 12 is a side view of a main part of the above.

FIG. 13 is a front view showing a conventional example.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Instrument main body 2 Light emitting diode 2b Lead 3 Human sensor 4 Brightness sensor 5 Lighting circuit 7 Control circuit 10 Body 20 Cover 30 Lens cover 42 Plug blade 50 Circuit board 57 Height adjustment spacer 90 Lens hood

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ Identification code FI Theme coat ゛ (Reference) F21V 23/04 F21W 131: 30 33/00 F21Y 101: 02 // F21W 131: 30 F21S 1/02 T F21Y 101: 02 G (72) Inventor Koji Yokota 856, Kanameki, Noda, Tsu, Mie, Japan F-term (reference) 3K014 AA01 GA03 PB00

Claims (6)

[Claims] 1. A circuit board on which a plurality of light emitting diodes for auxiliary lighting are arranged and mounted so as to form a desired illumination range, a fixture main body containing the circuit board, and the plurality of light emitting diodes. A lens cover that covers the diode and forms a part of the appliance body, wherein the plurality of light emitting diodes are arranged such that the emission surfaces are aligned on a virtual convex curved surface bulging outward of the appliance body, and A night light wherein a normal line passing through a point on the convex curved surface is a center line of light distribution, and an opening angle of an optical axis with respect to the center line increases as the distance from the center line increases. 2. The night light according to claim 1, wherein a power supply blade which can be inserted into an outlet of a commercial power supply is provided on a back side of the appliance main body. 3. An apparatus according to claim 1, wherein an illumination range adjusting cover formed by said lens cover and capable of adjusting an illumination range is mounted on the instrument body.
The described night light. 4. A height adjusting spacer interposed between the circuit board and each of the light emitting diodes for adjusting a distance between the circuit board and each of the light emitting diodes, wherein the height adjusting spacer is 4. The night light according to claim 1, wherein an insertion hole through which a lead of the light emitting diode is inserted is formed. 5. A system according to claim 1, further comprising: a brightness sensor for detecting ambient illuminance; and control means for turning on each of said light emitting diodes when the ambient illuminance detected by said brightness sensor becomes a specified value or less. The night light according to claim 4. 6. A brightness sensor for detecting ambient illuminance, a human sensor for detecting the presence or absence of a person in a detection area, and a human sensor when the ambient illuminance detected by the brightness sensor is equal to or less than a prescribed value. Control means for turning on each of the light emitting diodes when the presence of a person in the detection area is detected, and turning off each of the light emitting diodes after a fixed period of time when no person is detected anymore. 1
The night light according to claim 4.