JP3143412U - Lens and illuminator - Google Patents

Abstract

Provided are a lens and an electric decorator capable of obtaining a light image close to the shape of a candle flame.
An electrical decorator can selectively switch between a light-off mode, a candle mode, and a full-light mode by operating an operation element attached to the outer periphery of a base 2 to the left and right. A predetermined light image is displayed on the cover 4 detachably attached on the base 2 in the candle mode and the all-lamp mode. The lens for an electrical decoration includes a columnar portion 6a for entering light from one end, and a pointed portion 6b connected to the other end of the columnar portion 6a for emitting light. A light diffusion part is formed on the surface of the part 6b.
[Selection] Figure 3

Description

  The present invention relates to a lens and an electrical decorator.

Conventionally, as an electrical decorator, a plurality of light emitting elements are mounted on a substrate at equal intervals, covered with the substrate, shaped to image a candle flame, a first cover that diffuses and transmits light, There is known one provided with a second cover that is provided outside the cover and diffuses and transmits light at least part or all of the side surfaces (for example, Patent Document 1). The light-emitting element configured in this manner is turned on while changing the brightness in each cycle when power is applied, and the lights that are turned on in each brightness overlap, and further, the first cover and the second A diffused and permeated light at the cover can provide a light close to a candle flame when viewed from outside the second cover.
JP 2004-71376 A

  However, in the electrical ornament described in Patent Document 1, since the light-emitting element is only covered with the dome-shaped first cover, the light image visible from the outside is close to an egg shape and expresses the shape of a candle flame. Was not enough. This is because the shape of the candle flame is rounded at the base end of the flame and pointed at the tip, whereas in the electrical decorator described in Patent Document 1, the light image is rounded up and down as described above. Because.

  The present invention has been made to solve such problems, and an object of the present invention is to provide a lens and an electrical decorator that can obtain a light image close to the shape of a candle flame.

  The invention of claim 1 includes a columnar part for allowing light to enter from one end, and a pointed part for connecting to the other end of the columnar part for emitting light, and the surface of the pointed part Is a lens in which a light diffusing portion is formed.

  The invention according to claim 2 is the lens according to claim 1, wherein the light diffusing portion is formed of a rough surface.

  The invention according to claim 3 is the lens according to claim 1, wherein the light diffusion portion is formed by attaching a diffusion sheet.

  Invention of Claim 4 is a lens as described in any one of Claim 1 to 3, Comprising: The said columnar part is a column shape, The said pointed part is a cone shape, It is characterized by the above-mentioned.

The invention of claim 5
5. The lens according to claim 1, a light-emitting portion for allowing light to enter from the one end of the columnar portion, and a lens for inserting the one end side of the columnar portion to hold the lens in a predetermined state. It is an electrical decoration characterized by providing a receptacle.

The device of claim 6 is the electrical decorator according to claim 5,
A translucent cover portion surrounding at least the outer periphery of the lens is provided.

The device of claim 7 is the electrical decorator according to claim 5 or 6,
The light emitting unit includes three or more light emitting elements. In one mode, at least two light emitting elements among the three or more light emitting elements are separately turned on by the lighting control signal generating unit. The light emission is controlled to repeat light and dark with different periods according to the control signal, and at least one light emitting element among the remaining light emitting elements is generated by a lighting control signal generation unit, and the separate lighting control signals are transmitted at predetermined time intervals. The light emission is controlled by a lighting control signal that is alternately switched.

  According to the first to seventh aspects of the present invention, since a pointed portion having a light diffusing portion formed on the surface thereof is provided, a light image that is rounded at the proximal end side and sharpened at the distal end side can be obtained by the pointed portion. become. As a result, a light image having a shape close to that of a candle flame can be obtained as compared with the prior art.

  According to the invention of claim 7, in one mode, a separate lighting control signal is generated by sequentially switching at predetermined time intervals to a light image formed by a light emitting element controlled to emit light by a separate lighting control signal. Since the light image formed by the light-emitting element whose light emission is controlled by the lighting control signal is added, the entire light image expands and contracts greatly, and the flickering and blinking of the candle can be expressed.

Hereinafter, a lens and an electrical ornament according to an embodiment of the present invention will be described with reference to the drawings.
FIG. 1 is a perspective view of an electrical decorator according to an embodiment of the present invention, FIG. 2 is a perspective view of the electrical decorator of FIG. It is a disassembled perspective view of an electrical decorator.

In the electrical decoration device 1 according to the embodiment of the present invention, by operating the operation element 3 attached to the outer periphery of the base 2 to the left and right, the light-off mode, the candle mode, and the full-light mode can be selectively switched. . A predetermined light image is displayed on the cover 4 detachably attached on the base 2 in the candle mode and the all-lamp mode. Specifically, in the candle mode, the cover part 4 blinks and flickers like a candle flame, and in the full-light mode, it is shaped like a candle flame. A light image with little blinking and fluctuation is projected.
Hereinafter, the detail of this electrical decorator 1 is demonstrated.

  Inside the base 2, a battery (not shown) serving as a power source for the electrical decorator 1 and a light emitting element lighting circuit device 20 (see FIG. 4) are installed. Among these, the light emitting element lighting circuit device 20 will be described in detail later.

Although there is no particular limitation on the upper surface of the base 2, three light emitting elements (LEDs) A, B, and C are provided side by side on the wiring board 10. The three light emitting elements (LEDs) A, B, and C are not particularly limited, but are of a chip type, and the light emission color of the three light emitting elements A, B, and C is, for example, white. Yes.
A lens stand 5 is installed on the upper surface of the base 2. The lens stand 5 is for raising the lens 6. This lens stand 5 has a cylindrical shape, and has a flange portion for facilitating standing at the lower end. The opening diameter of the lens stand 5 is large enough to surround the three light emitting elements A, B, and C.
Here, the whole lens stand 5 has a light shielding property, and is configured such that the three light emitting elements A, B, and C cannot be directly visually recognized from the outside. Note that only a part of the lens stand 5 may have a light shielding property. What is required is to prevent light from the three light emitting elements A, B, and C from leaking directly to the outside.

The lens 6 is not particularly limited, but is made of acrylic resin or glass. The lens 6 is for forming an optical image resembling the shape of a candle flame, and includes a columnar portion 6a and a pointed portion 6b.
The columnar portion 6a of the lens 6 is formed in a cylindrical shape. Although this columnar part 6a is not specifically limited, it is colorless and transparent. The lens 6 is held by the lens stand 5 by inserting the lower end of the columnar portion 6 a into the opening of the lens stand 5.
On the other hand, the pointed portion 6b of the lens 6 is not particularly limited, but is formed in a conical shape. The outer peripheral surface of the pointed portion 6b is a light diffusing surface. As a method of setting the outer peripheral surface of the pointed part 6b as a light diffusion surface, for example, a method of forming irregularities on the outer peripheral surface of the pointed part 6b by sandblasting, Examples thereof include a method of forming streaky irregularities on the outer peripheral surface, a method of attaching a light diffusion film to the outer peripheral surface of the pointed portion 6b, and the like.
The pointed portion 6b is not particularly limited, but is colored with a dye or the like.
The tip of the pointed portion 6b may be sharp, but it may be somewhat rounded or flat. For example, if there is a flat part, the light will escape upward from it, and the height of the optical image will increase.

The cover 4 covers the upper surface of the base 2 and the lens 6 held by the lens stand 5. This cover part 4 is exhibiting the shape which turned the cup upside down. The surface of the cover 4 is ground glass and translucent.
In addition, the cover part 4 should just surround the outer periphery of the lens 6. Moreover, the cover part 4 may be comprised from Japanese paper. Further, the optical image may be projected on a wall or a screen through the projection lens without providing the cover 4.

Next, the light emitting element lighting circuit device 20 will be described with reference to FIG.
The light emitting element lighting circuit device 20 includes a reference signal generation unit 21, a first duty control unit 22, a second duty control unit 23, a switching signal generation unit 24, a drive switching unit 25, and a lighting driver 26. It consists of The configuration of each part of the light emitting element lighting circuit device 20 will be described together with the operation in the candle mode.

The reference signal generator 21 is for generating a reference signal for driving the three light emitting elements A, B, and C. The reference signal is not particularly limited, but an 8.25 Hz square wave signal is generated.
The first duty control unit (lighting signal generation unit) 22 mainly generates a lighting control signal for the light emitting diode A based on the reference signal. The second duty control unit (lighting signal generation unit) 23 is mainly for generating a lighting control signal for the light-emitting diode B based on the reference signal.
Here, the first duty control unit 22 and the second duty control unit 23 are not particularly limited in the duty of the reference signal from the reference signal generation unit 21, but are 98.7% shown in FIG. 5 to 6% shown in FIG. The light emitting elements A and B are caused to emit light so as to repeat light and dark like a sine wave or a triangular wave. However, the cycle of duty change differs between the lighting control signal output from the first duty control unit 22 and the lighting control signal output from the second duty control unit 23. Although not particularly limited, the lighting control signal output from the first duty control unit 22 has a duty cycle of 0.14 Hz, and the lighting control signal output from the second duty control unit 23 has a cycle of 0. 22 Hz.
The switching signal generator 24 is for generating a timing signal for switching the driving of the light emitting element C. The timing signal is not particularly limited, but a 2.85 Hz square wave signal shown in FIG. 7 is generated.
The drive switching unit (lighting signal generation unit) 25 is for generating a lighting control signal for the light emitting element C based on the lighting control signals of the first duty control unit 22 and the second duty control unit 23. Specifically, the drive switching unit 25 includes a lighting control signal output from the first duty control unit 22 and a second duty control unit at the high and low switching timings of the drive switching timing signal from the switching signal generation unit 24. The lighting control signal is generated by alternately switching the lighting control signal output from 23.
The lighting driver 26 inverts the lighting control signal and supplies it to the light emitting elements A, B, and C.
As described above, the light emission of the light-emitting diodes A, B, and C is controlled as shown in FIGS. 8 (A), (B), and (C).

  The operation of each part of the light-emitting element lighting circuit device 20 in the candle mode has been described above. However, in the all-lamp mode, for example, the first duty control unit 22 and the second duty control unit 23 have the reference The duty of the reference signal from the signal generator 21 is not particularly limited, but is fixed to 98.7% shown in FIG.

Next, the operation and effect of the lens 6 according to the embodiment of the present invention will be described.
First, a light image projected on the cover unit 4 when the light emitting element is caused to emit light at a constant current will be seen.
FIG. 9 schematically shows a light image projected on a cover portion 41 (only the shape is different from the cover portion 4 of the above embodiment) when the light emitting element is covered with a milky white cover 40 having a cylindrical shape whose upper surface is rounded. Has been shown. In this case, the light image projected on the cover part 41 is close to an egg shape. That is, the optical image has a rounded shape on both the top and bottom.
In FIG. 10, light projected onto the cover portion 4 (the same reference numerals are used since it is the same as the cover portion in the above embodiment) when the upper outer peripheral surface of the lens 50 having a cylindrical shape and a flat upper surface is used as the diffusion surface. The image is shown schematically. In this case, the optical image has a cylindrical shape.
FIG. 11 schematically shows a light image projected on the cover unit 4 when the lens 6 according to the embodiment is used. In this case, the optical image has a shape in which the lower side is round and the upper side is pointed. The actual candle flame has a bowl shape and is close to a light image when the lens 6 of FIG. 11 is used. Incidentally, when the pointed portion 6b is made shorter than the case of FIG. 11, the height of the optical image is reduced. If it is too small, the height dimension is insufficient with respect to the lateral dimension, and it is far from the shape of the candle flame.

Next, the operation and effect of the electrical decorator 1 according to the embodiment of the present invention will be described.
According to the decorator 1, the light emission states of the two light-emitting elements A and B are alternated on the fluctuation of the light image generated by the combination of the two light-emitting elements A and B that repeat light and dark with different periods. Since the fluctuation of the light image of the light emitting element C is added, the overall structure greatly expands and contracts in the vertical direction, and the brightness also changes greatly.
This is schematically shown in FIG. As a result, it is possible to express how the flame of the candle becomes small and disappears for a moment and then burns vigorously.

As mentioned above, although embodiment of this invention was described, it cannot be overemphasized that this invention is not limited to the said embodiment, In the range which does not deviate from the summary, it can change variously.
For example, in the above embodiment, the columnar columnar portion is provided with the conical pointed portion, but it is needless to say that the pyramid-shaped columnar portion may be provided with a pyramidal pointed portion.
The cross section perpendicular to the length direction of the columnar part and the same direction cross section of the pointed part are the same or similar to each other, but may be different from each other.
Furthermore, although the case where the outer peripheral surface of the columnar part and the outer peripheral surface of the pointed part are continuous has been described, a step may be formed at the boundary between the columnar part and the pointed part.

It is a perspective view of the electrical decorator concerning the embodiment of the present invention. It is a perspective view of the state where a part of cover parts etc. of the electrical decorator of Drawing 1 was cut away. It is a disassembled perspective view of the electrical decorator of FIG. It is a figure which shows the structure of the light emitting element lighting circuit device of the electrical decorator of FIG. It is a figure which shows the LED lighting control waveform of the electrical decorator of FIG. It is a figure which shows the LED lighting control waveform of the electrical decorator of FIG. It is a figure which shows a drive switching waveform. It is a figure which shows the control waveform of light emission of the light emitting diodes A, B, and C. It is a schematic diagram of the structure and optical image of a comparative example. It is a schematic diagram of the structure and optical image of a comparative example. It is a schematic diagram of a lens and an optical image according to the embodiment. It is a schematic diagram of a lens and an optical image change according to the embodiment.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Illuminator 2 Base 3 Operation element 4 Cover part 5 Lens stand 6 Lens 20 Light emitting element lighting circuit device 21 Reference signal generation part 22 1st duty control part (lighting signal generation part)
23 Second duty control unit (lighting signal generation unit)
24 switching signal generator (lighting signal generator)
25 Drive switching unit (lighting signal generator)
26 Lighting driver

Claims (7)

  A columnar part for entering light from one end and a pointed part for emitting light that is connected to the other end of the columnar part, and a light diffusion part is formed on the surface of the pointed part A lens characterized by being made.   The lens according to claim 1, wherein the light diffusing portion is formed of a rough surface.   The lens according to claim 1, wherein the light diffusion portion is formed by attaching a diffusion sheet.   The lens according to any one of claims 1 to 3, wherein the columnar part has a cylindrical shape, and the pointed part has a conical shape.   5. The lens according to claim 1, a light-emitting portion for allowing light to enter from the one end of the columnar portion, and a lens for inserting the one end side of the columnar portion to hold the lens in a predetermined state. An electrical decoration comprising a receiver.   6. The electrical decorator according to claim 5, further comprising a translucent cover that surrounds at least the outer periphery of the lens.   The light emitting unit includes three or more light emitting elements. In one mode, at least two light emitting elements among the three or more light emitting elements are separately turned on by the lighting control signal generating unit. The light emission is controlled to repeat light and dark with different periods according to the control signal, and at least one light emitting element among the remaining light emitting elements is generated by a lighting control signal generation unit, and the separate lighting control signals are transmitted at predetermined time intervals. The electric decoration according to claim 5 or 6, wherein the light emission is controlled by a lighting control signal in a form of switching alternately.

Images