CN203734873U - Lighting source - Google Patents

Abstract

The utility model discloses a lamp (lighting source) (1), and the lamp (1) is provided with: a power supply part (80) which is used for outputting direct-current power; a light-emitting module (10) which is provided with a module substrate (11) and a light-emitting part (13) disposed on the module substrate (11), wherein the power of the light-emitting module (10) is supplied by the power supply part (80); a housing (60) which is made of metal, wherein the interior of the housing (60) contains the power supply part (80), and the housing (60) is arranged to be adjacent to the light-emitting module (10) and is electrically insulated with the light-emitting module (10); a lamp socket (7) which is installed on the housing (60) and used for supplying power to the power supply part (80) from an external power supply; and a capacitor (80c), wherein one end side of the capacitor (80c) is electrically connected with an output terminal (TL1) of the power supply part (80), and the outer end side of the capacitor (80c) is electrically connected with the housing (60). The capacitor (80c) is used for dividing a voltage applied between the lamp socket (7) and the housing (60) in an insulation voltage endurance test.

Description

Illumination light source

Technical field

The utility model relates to one and has used the illumination light source of LED (light-emitting diode) etc., particularly relates to a kind of for improving the technology of the performance to dielectric voltage withstand test.

Background technology

In the past, proposed to use the lamp (with reference to patent documentation 1) of the bulb type of LED etc.

Figure 10 illustrates an example of the lamp of this bulb-shaped.

Lamp 100 shown in Figure 10 possesses: power supply unit (not shown), and it exports direct current power; Light emitting module 110, it has to overlook observes the multiple LED (illuminating part) 113 that are circular module substrate 111 and configure along the perimembranous of module substrate 111; Base station 120, it is formed as overlooking observing with the roughly the same shape of light emitting module 110 and in upper surface side installs light emitting module 110; And housing 160, it is cylindric that it utilizes metal to be roughly formed as, at inside storage power supply unit, base station 120.In addition, lamp 100 possesses and has the socket of round-ended cylinder shape 170 and lampshade (globe) 130, and this has the socket 170 of round-ended cylinder shape to be configured in the downside of housing 160, and this lampshade 130 is installed on the upside of housing 160 to cover the mode of light emitting module 110.

In addition, on light emitting module 110, possessing the observation overlooked is roughly the first circular reflecting member 140 and is roughly the second reflecting member 150 that has round-ended cylinder shape, this the first reflecting member 140 is configured to cover the top of illuminating part 113, the light that reflection is penetrated from illuminating part 13, this second reflecting member 150 is installed on module substrate 111 in the mode of the interior side opening of overlay module substrate 111.

In this lamp 100, configure multiple illuminating parts 113 along the perimembranous of module substrate 111, realize thus the light distribution characteristic that improves lamp 100.

Patent documentation 1: TOHKEMY 2010-86946 communique

Utility model content

The problem that utility model will solve

In addition, abroad, sometimes use lamp with rated voltage 220V to 277V, during therefore from use, guarantee the viewpoint of fail safe, require the performance to dielectric voltage withstand test between socket 170 and housing 160 to improve.As shown in figure 11, this dielectric voltage withstand test is to make, under the shell 171 of socket 170 and the state of eyelet 172 short circuits, to apply the alternating voltage (for example, frequency 60Hz) of 4kV between socket 170 and housing 160.And in this dielectric voltage withstand test, the target of the performance of requirement is, can insulation breakdown or flashover according to the benchmark in the industry of the standard with reference to EN609687 bar.

But, in the time lamp 100 being carried out to the test of above-mentioned dielectric voltage withstand, sometimes at housing 160 and approach between the illuminating part 113 that housing 160 configures and produce insulation breakdown.Be electrically connected via power supply unit 80 from socket 170 to illuminating part 113, therefore test between the illuminating part 113 and housing 160 that the voltage applying concentrates on electric upper open circuit by dielectric voltage withstand, in the time having applied the voltage that exceedes this insulation breakdown distance, produce insulation breakdown, flashover.

On the other hand, the dielectric voltage withstand (particularly, the dielectric voltage withstand between illuminating part 113 and housing 160) between circuit and the housing 160 of considering to comprise light emitting module 110 by raising is realized the raising of the performance to dielectric voltage withstand test.At this, consideration strengthens module substrate 111 and strengthens the distance between illuminating part 113 and housing 160, or the configuration of change illuminating part 113 makes its central portion near module substrate 111 strengthen the distance between illuminating part 113 and housing 160.

But, in the time strengthening module substrate 111, also have to strengthen for receiving the housing 160 of module substrate 111, cause lamp 100 itself to maximize.On the other hand, in the time that the configuration of change illuminating part 113 makes its central portion near module substrate 111, likely can not get the light distribution characteristic of expecting.

And, in the situation that considering abroad and in Japan dual-purpose module substrate 111, require by make to be equipped on towards the module substrate 111 of external lamp be equipped on the reduction that realizes the manufacturing cost of lamp towards commonization of specification of the module substrate 111 of lamp in Japan.

The utility model completes in view of the above problems, is to provide a kind of illumination light source that position relationship of illuminating part and housing is not changed the raising that just can realize the performance to dielectric voltage withstand test.

For the scheme of dealing with problems

In order to achieve the above object, the related illumination light source of the utility model possesses: power supply unit, its output power; Light emitting module, it has module substrate and is installed on the illuminating part of this module substrate, and this light emitting module is connected with the output of above-mentioned power supply unit and receives and provide from the electric power of above-mentioned power supply unit; Housing, it is formed by conductive material, and this housing receives above-mentioned power supply unit in inside and ground connection adjacent with above-mentioned light emitting module is configured; Socket, it is for providing electric power from external power source to above-mentioned power supply unit; And dividing potential drop element, one is distolateral to be electrically connected with the output of above-mentioned power supply unit and another distolateral and above-mentioned housing is electrically connected, and in the time that dielectric voltage withstand is tested, the voltage being applied between above-mentioned socket and above-mentioned housing is carried out to dividing potential drop.

The effect of utility model

According to this structure, at common light emitting module and the dividing potential drop element of being connected with of output of power supply unit, and dividing potential drop is connected between the output and housing of power supply unit with element.Thus, in the time that dielectric voltage withstand is tested probably applying the voltage being applied between dividing potential drop element two ends between light emitting module and housing, the dielectric voltage withstand test voltage applying being applied between socket and housing carries out the voltage that dividing potential drop obtains, and can reduce thus the voltage being applied between light emitting module and housing.Thus, do not need the position relationship between illuminating part and housing to change to expand the distance between illuminating part and the housing of light emitting module, just can be suppressed between illuminating part and housing and produce insulation breakdown, therefore can realize the raising that maintains and realize the performance to dielectric voltage withstand test of light distribution characteristic.

In addition, according to this structure, along with possessing for electric power being provided parts that the socket of electric power is provided and has the structure identical with the lamp towards in Japan of rated voltage 100V to 120V from external power source, and when the alternating voltage that the lamp towards external that can make rated voltage 220V to 277V meets the performance that requires in dielectric voltage withstand test, apply 4kV between socket and housing, current value is below 100mA, therefore can make, towards lamp in Japan and commonization of component specification towards external lamp, can realize the reduction of manufacturing cost.

And, by testing and suitably select dividing potential drop element according to various dielectric voltage withstands, can realize the raising of the performance to this dielectric voltage withstand test.

In addition, in the related illumination light source of the utility model, can be also, above-mentioned dividing potential drop element be capacitor, resistance or surge absorber.

According to this structure, use more cheap capacitor, resistance as dividing potential drop element, therefore can realize the reduction of component costs, but also can replace them and use the so-called surge absorber such as ZNR, discharging gap.

In addition, in the related illumination light source of the utility model, can be also, also possess linkage unit, this linkage unit be for being electrically connected above-mentioned dividing potential drop with above-mentioned another distolateral and above-mentioned housing of element.

In addition, in the related illumination light source of the utility model, can be also that above-mentioned linkage unit is made up of following part: base station, it is formed as tabular by conductive material, install sealing under the part of a side opening portion for above-mentioned housing and the state that contacts with above-mentioned housing; Screw, it is formed by conductive material, and for above-mentioned light emitting module is fixed on to above-mentioned base station; And lead-in wire, it is an end and above-mentioned another distolateral is electrically connected and the other end is electrically connected and forms with above-mentioned screw of above-mentioned dividing potential drop element.

According to the utility model, be connected this simple method with screw by going between, can improve the performance to dielectric voltage withstand test, therefore can realize the raising of installation exercise.

In addition, in the related illumination light source of the utility model, can be also, above-mentioned linkage unit be made up of following part: housing terminal for connecting, and it is configured on above-mentioned module substrate and with above-mentioned housing and is electrically connected; And lead-in wire, its be an end with above-mentioned dividing potential drop element above-mentioned another distolateral be electrically connected and the other end via going between and above-mentioned housing terminal for connecting is formed by connecting.

In addition, in the related illumination light source of the utility model, can be also, above-mentioned power supply unit comprises flyback converter, and this flyback converter makes to input distolateral and output end electric insulation by transformer and forms.

According to this structure, inputting distolateral and output end carries out electric insulation by transformer and forms, in the time that dielectric voltage withstand is tested, can make voltage drop by transformer thus, therefore in the time that dielectric voltage withstand is tested, can significantly reduce the voltage being applied between illuminating part and housing.

In addition, in the related illumination light source of the utility model, also can be, foregoing circuit substrate be be formed with the primary coil that comprises above-mentioned transformer circuit region and be formed with and between the region of circuit of the secondary coil that comprises above-mentioned transformer, be formed on the slit connecting on thickness direction and form.

According to this structure, in the time that dielectric voltage withstand is tested, the generation of the creeping discharge producing between the circuit that can be suppressed at the circuit that comprises primary coil and comprise secondary coil, therefore can realize the raising of the performance to dielectric voltage withstand test.

In addition, in the related illumination light source of the utility model, can be also, rated voltage be 220V to 277V.

Brief description of the drawings

Fig. 1 is the stereogram of the biopsy cavity marker devices of the related lamp of execution mode.

Fig. 2 is the sectional view of the related lamp of execution mode.

Fig. 3 is the major part sectional view of the related lamp of execution mode.

Fig. 4 is the vertical view of the related lamp of execution mode.

Fig. 5 is the stereogram of the related power supply unit of execution mode.

Fig. 6 is the structure chart of the related power supply unit of execution mode.

Fig. 7 is the action specification figure during the dielectric voltage withstand of the related lamp of execution mode is tested.

Fig. 8 is the vertical view of the related lamp of variation.

Fig. 9 is the exploded perspective view of the related lamp of variation.

Figure 10 is the stereogram of the biopsy cavity marker devices of the related lamp of past case.

Figure 11 is the figure of the method for dielectric voltage withstand test is described.

Embodiment

< execution mode >

The related lamp 1 as illumination light source of present embodiment uses with rated voltage 220V to 277V, according to the benchmark in the industry of the standard with reference to EN609687 bar, between socket 70 and housing 60, apply 4kV alternating voltage dielectric voltage withstand test (with reference to Figure 10) performance, can insulation breakdown or flashover in the time that dielectric voltage withstand is tested.

<1> structure

The structure of the related lamp of present embodiment 1 is described below.

Fig. 1 is the fragmentary perspective cross sectional view of lamp 1.Fig. 2 is the sectional view along the A-A ' line shown in Fig. 1.Fig. 3 is the major part sectional view along the B-B ' line shown in Fig. 1.Fig. 4 is the vertical view taking off under the lampshade 30 of lamp 1 and the state of the second reflecting member 50.In addition,, in Fig. 2, the lamp axle J of a chain-dotted line indication lamp 1 of describing along paper above-below direction, is made as the front that paper top is lamp 1, the rear that paper below is lamp 1.

As depicted in figs. 1 and 2, lamp 1 possesses: light emitting module 10; Base station 20, it is provided with light emitting module 10; Lampshade 30, it covers light emitting module 10; Power supply unit 80, it is for providing electric power to light emitting module 10; Circuit keeper 62, it contains power supply unit 80; Housing 60, it covers circuit keeper 62; Socket 70, it is for the electric power providing from outside source power supply is provided; The first reflecting member 40, it is for making the emergent light diffusion from light emitting module 10; The second reflecting member 50, it is for sealing the opening portion of the first reflecting member 40 inner sides; And capacitor 80c, it is used for the voltage being applied between socket 70 and housing 60 to carry out dividing potential drop in the time that dielectric voltage withstand is tested.

<1-1> light emitting module

Light emitting module 10 possesses module substrate 11 and is disposed at multiple (for example, 16) illuminating part 13 of module substrate 11.Illuminating part 13 uses seal sealing semiconductor light-emitting component to form.At this, semiconductor light-emitting elements is to penetrate the LED of blue light, and seal is made up of the silicones of the fluorophor particle that to have sneaked into blue light wavelength conversion be sodium yellow.And the sealed bulk wave length of a part of the blue light penetrating from semiconductor light-emitting elements is transformed to sodium yellow, thereby penetrate from illuminating part 13 white light being generated by the blend of colors of the sodium yellow the blue light not converting and conversion.In addition, illuminating part 13 for example also can use EL element (electroluminescent cell).

Module substrate 11 is formed as overlooking and is viewed as roughly circularly, has the tongue piece portion 11a extending to the inside from one of inner peripheral.In this tongue piece portion, 11a is provided with power supply terminal 11b, and this power supply terminal 11b is for offering illuminating part 13 by the electric power providing from power supply unit 80.

<1-2> base station

Base station 20 is formed by conductive materials such as the metals taking Al as principal component, has general cylindrical shape shape, and this general cylindrical shape shape has to overlook observes rounded through hole 21.Configure this base station 20 with the cylinder axle posture consistent with lamp axle J (with reference to Fig. 2).Thereby, overlooking observation with the orthogonal front surface 22 of lamp axle J and rear surface and be all roughly toroidal in base station 20.At this, with a part from through hole 21 to the interior outstanding state configuration power supply unit 80 of lampshade 30.In addition, in front surface 22 sides of base station 20, light emitting semiconductor module 10 is installed.In addition, as shown in Figures 2 and 3, be formed with the screw hole 21 for screwing togather screw 86 at base station 20.And, use screw 86 that light emitting module 10 is fastened to base station 20 together with the first reflecting member 40 and fix light emitting module 10.This screw 86 is formed by conductive material.

<1-3> lampshade

Lampshade 30 is normally copied the shape as bulb-shaped A type bulb housing, by the open side end 31 of lampshade 30 being pressed in the front side end 60a of housing 60, under the state in front that covers light emitting module 10 and the first reflecting member 40, be fixed on housing 60.In addition, the shape of lampshade 30 is not limited to copy the shape of A type bulb housing, can be also arbitrary shape.And lamp 1 can be also the structure that does not possess lampshade.In addition, also can use bonding agent etc. that lampshade 30 is fixed on to housing 60.

The light that incides the inner surface 32 of lampshade 30 is fetched to the outside of lampshade 30 after all wall scatterings of lampshade 30 through lampshade 30.

<1-4> keeper

Keeper 62 is the general cylindrical shape shape of both-side opening, is made up of large-diameter portion 63 and minor diameter part 64.Accommodate the more than half of power supply unit 80 at the large-diameter portion 63 that is positioned at front side.On the other hand, socket 70 is outer clamped in the minor diameter part 64 of rear side, seals thus rear side opening 65.Keeper 62 is formed by insulating properties materials such as resins.

The large-diameter portion 63 of keeper 62 is configured in through hole 21 inner sides of base station 20.In addition, in keeper 62, be provided with notch 66 in the position corresponding with the tongue piece portion 11a of light emitting module 10.The front end of tongue piece portion 11a is inserted in keeper 62 via notch 66, thereby the power supply terminal 11b that is configured in tongue piece portion 11a front end is positioned at keeper 62.

<1-5> housing

Housing 60 is formed by conductive materials such as the metals taking Al as principal component, has the drum of both ends open the past direction rear undergauge.In addition, contain the open side end 31 of base station 20 and lampshade 30 in the 60a of the front side end of housing 60, the state that base station 20 contacts with housing 60 with a side face part is fixed on housing 60.Specifically, the shape of the outer peripheral edges of the rear side end of base station 20 and the inner peripheral surface 60b of housing 60 is consistent and be formed as conical in shape.Its taper surface 25 contacts with the inner peripheral surface 60b face of housing 60.Thus, base station 20 is electrically connected with housing 60.

In addition, at this, base station 20 and housing 60 are made as to different members, but also sometimes come one-body molded by the manufacture method such as die casting of having used mould.Thus, can promote from the hot diffusion of light emitting module generation.

<1-7> socket

Socket 70 is the members that receive electric power in the time that lamp 1 is installed on to ligthing paraphernalia and lights for the socket from ligthing paraphernalia.The kind of socket 70 is the E27 socket as Edison's type.Socket 70 possesses shell portion 71 and eyelet portion 73, roughly cylindrical shape of this shell portion 71, and outer peripheral face is external screw thread, this eyelet portion 73 is installed on shell portion 71 via insulation division 72.Between shell portion 71 and housing 60, there is insulating component 74.

<1-8> the first reflecting member

As shown in Figure 3, the first reflecting member 40 possesses the main part 41 of the general cylindrical shape shape that is tubular and both-side opening and seals the installation portion 42 of the roughly circular plate shape of the rear side opening of main part 41.The first reflecting member 40 is formed by resins such as Merlon.

As shown in Figure 3, at the first reflecting member 40, porose portion 43 is set, the outer peripheral edges of installation portion 42 are being positioned under the state of inner peripheral of the module substrate 11 of light emitting module 10, the screw 86 that is inserted into hole portion 43 is screwed togather with the screw hole 26 of base station 20, thus the first reflecting member 40 is fastened to base station 20 together with module substrate 11.In addition, as shown in Figure 4, near the three places border between main part 41 and installation portion 42 arrange porose portion 43.

About main part 41, the external diameter that is front side is greater than external diameter roughly cylindric of rear side, and its axle is consistent with lamp axle J.About the outer peripheral face of main part 41, in the situation that observing front side, lamp axle J is being roughly toroidal from rear side, cover multiple illuminating parts 13 of ring-type configuration on module substrate 11.

As shown in Figure 4, on the first reflecting member 40, on whole main part 41 and installation portion 42 centered by the cylinder axle of main part 41, be provided with multiple peristomes 46 along the Zhou Fangxiang of the outer peripheral face 45 of main part 41 across compartment of terrain.Specifically, 16 peristomes 46 that quantity is identical with the quantity of the illuminating part 13 of light emitting module 10 with man-to-man relation and illuminating part 13 opposite along the Zhou Fangxiang of outer peripheral face 45 across being equally spaced arranged at main part 41.Peristome 46 is overlooked to observe and is roughly square, and the position of overlooking the only about half of cylinder axle side of observing illuminating part 13 is positioned at peristome 46, and the remaining only about half of position with cylinder axle opposition side is covered by main part 41.That is to say, the only about half of of illuminating part 13 exposes and remaining only about half ofly hidden by main part 41 from peristome 46.In addition, as shown in Figure 3, the upper surface of illuminating part 13 (light-emitting face) is opposite with the outer peripheral face 45 of main part 41.And a part for the light penetrating from illuminating part 13 reflects at the outer peripheral face 45 of main part 41.

<1-9> the second reflecting member

As shown in Figure 2, the second reflecting member 50 is made up of main part 50a cylindraceous roughly and the cap 50b that has round-ended cylinder shape that seals the front side opening of main part 50a.The front side of main part 50a in outer peripheral face is formed with flange part 50c on whole side face, and this flange part 50c has from rear forwards the shape of hole enlargement gradually.Thus, main part 50a performance following functions: the light that penetrates from illuminating part 13 is reflected to the direction of intersecting with lamp axle J at outer peripheral face.

<1-10> power supply unit

Power supply unit 80, for lighting illuminating part 13, as shown in Figure 2, has circuit substrate 80a and various electronic unit (circuit element) 80b, and these various electronic units (circuit element) 80b is installed in this circuit substrate 80a.In addition, in the accompanying drawings only to a part of circuit element attached drawings mark.This power supply unit 80 is contained in keeper 62, is fixed on keeper 62 by screw clamp, bonding, engaging etc.

It is tabular that circuit substrate 80a is formed as essentially rectangular, and the posture parallel with lamp axle J with its interarea is configured.The power supply terminal TP1, the TP2 that are arranged at the power supply unit 80 in circuit substrate 80a are connected with an end of lead-in wire 88a, 88b respectively.The other end of lead-in wire 88a is connected by the rear side opening 65 of keeper 62 and the eyelet portion 73 of socket 70.The other end of lead-in wire 88b is by being arranged at the through hole 61 of keeper 62 and the shell portion 71 of socket 70 is connected.

In addition, as shown in Fig. 5 (a), the lead-out terminal TL1, the TL2 that are arranged at the power supply unit 80 in circuit substrate 80a are connected with an end of twisted-pair feeder wiring 82.The other end in this twisted-pair feeder wiring 82 is provided with power-feed connector 82a.This power-feed connector 82a be connected with the power supply terminal 11b that is arranged at light emitting module 10 (with reference to Fig. 4).

In addition, the terminal TE1 being arranged in circuit substrate 80a is connected with an end of lead-in wire 84, in the other end of this lead-in wire 84, crimp type terminal 84a is installed.This crimp type terminal 84a is fixed on the screw 86 (with reference to Fig. 4) screwing togather with the screw hole 26 of base station 20.Thus, terminal TE1 is electrically connected with housing 60 via lead-in wire 84, screw 86 and base station 20.At this, form by lead-in wire 84, screw 86 and base station 20 linkage unit that capacitor 80c is electrically connected with housing 60.

<1-11> capacitor (dividing potential drop element)

As depicted in figs. 1 and 2, capacitor 80c is arranged on the circuit substrate 80a of a part that forms power supply unit 80.In addition, in the related lamp 1 of present embodiment, the capacitor that use static capacity is 3300pF is as this capacitor 80a.This capacitor 80a is electrically connected with terminal TE1 via the wiring pattern being formed on circuit substrate 80a.

<2> circuit structure

At this, the structure of the circuit being made up of power supply unit 80 and capacitor 80c is described with the circuit diagram of the power supply unit shown in Fig. 6.

As shown in Figure 6, power supply unit 80 is made up of rectifier smoothing circuit 81a and flyback converter 81b, this rectifier smoothing circuit 81a carries out rectification to the interchange providing from AC power (not shown) and smoothly exports, and this flyback converter 81b is connected with the output of rectifier smoothing circuit 81a.And, while conventionally use, be provided with for receiving electric power the power supply terminal TP1, the TP2 that provide from AC power and for light emitting module 10 being provided to lead-out terminal TL1, the TL2 of electric power.

<2-1> rectifier smoothing circuit

Rectifier smoothing circuit 81a is configured to and comprises: diode bridge DB, and it is made up of four diode D1, D2, D3, D4; Electrolytic capacitor C1, it is connected between the output of diode bridge DB; And series circuit, it is made up of resistance B1, the F2, B2, coil NF and the capacitor C2 that are connected between the two ends of electrolytic capacitor C1, the voltage between the two ends of rectifier smoothing circuit 81a output capacitor C2.At this, in order to protect flyback converter 81b, Zener diode D5 is connected in parallel on capacitor C2.In addition, in order to prevent that rectifier smoothing circuit 81a is applied to surge voltage, between the input of diode bridge DB, connect surge absorber, this surge absorber is made up of resistance F1 and Zinc-oxide piezoresistor ZNR.

<2-2> flyback converter

Flyback converter 81b is configured to and comprises control circuit IC1, transformer T1 and diode D1.

Control circuit IC1 uses the SSL152x series of NXPSemiconductors company system.This control circuit IC1 possesses 7 terminals, the first terminal is power supply terminal, the second terminal is earthy terminal, the 3rd terminal is the earthy terminal of the oscillator (not shown) in control circuit IC1, the 4th terminal is that the voltage being connected with the reference voltage source (not shown) in control circuit IC1 provides with terminal, Five-terminals is the current detecting terminal being connected with the current detection circuit (not shown) in control circuit IC1, the 6th terminal is the terminal being connected with the source electrode of the switch element (not shown) being made up of N channel-type MOSFET in control circuit IC1, the 8th terminal is the terminal being connected with the drain electrode of this switch element.At this, the series circuit being made up of two resistance R 3, R4 that has capacitor C5 and be connected in parallel with capacitor C5 between the output of the low potential side of the first terminal and rectifier smoothing circuit 81a, this capacitor C5 is for making to be applied to the voltage smoothing of the first terminal.The second terminal is connected with the output of the low potential side of rectifier smoothing circuit 81a.The 3rd terminal is connected with the output of the low potential side of rectifier smoothing circuit 81a via the parallel circuits of resistance R 2 and capacitor C4.The 4th terminal is connected with the tie point of resistance R 3, R4, is transfused to the voltage producing at this tie point.The 6th terminal is connected with the output of the low potential side of rectifier smoothing circuit 81a via resistance R 6A, the R6B of connection parallel with one another.

Transformer T1 is made up of primary coil T11, secondary coil T12 and tertiary coil T13, wherein, the electric power that this secondary coil T12 induces when electric current is flow through to primary coil T11 offers light emitting module 10, and the electric power that this tertiary coil T13 induces when electric current is flow through to primary coil T11 offers the power supply terminal of control circuit IC1.

At this, the output of the hot side of distolateral and a rectifier smoothing circuit 12 of primary coil T11 is connected, and another is distolateral is connected with the 8th terminal of control circuit IC1 via resistance B3.At this, as mentioned above, the 8th terminal of control circuit IC1 is connected with the drain electrode of the switch element that is built in control circuit IC1, therefore connects by this switch element that disconnection is moved and pulsating current flows through primary coil T11.

One of secondary coil T12 is distolaterally connected with the lead-out terminal TL1 of hot side via diode D1.One of tertiary coil T13 is distolaterally connected with the first terminal of control circuit IC1 with resistance R 1 via diode D4, and the output of the low potential side of another distolateral and rectifier smoothing circuit 81a is connected.

The anode of diode D1 is connected with secondary coil, and negative electrode is connected with the lead-out terminal TL2 of low potential side.And, between another of the negative electrode of diode D1 and secondary coil T12 is distolateral, be connected in parallel to capacitor C3, C7 and resistance R 7A, the R7B of level and smooth use.At this, capacitor C3, the C7 smoothing of the smoothed use of pulsating voltage producing between another of the negative electrode of diode D1 and secondary coil T12 is distolateral produce direct voltage thus between lead-out terminal TL1, TL2.

In addition, between the output of the low potential side of another distolateral and rectifier smoothing circuit 81a in secondary coil T12, be connected a distolateral opposition side with the anode of diode D1, be connected with capacitor C6, this capacitor C6 cuts off the circuit that comprises primary coil T11 (below for direct current, be called " primary coil lateral circuit ") 81b1 and the circuit that comprises secondary coil T12 (following, to be called " secondary coil lateral circuit ") 81b2.

And, between lead-out terminal TL1 and terminal TE1, being connected with capacitor C8, terminal TE1 is electrically connected with housing 60.Electronic unit 80c shown in Fig. 1 and Fig. 2 is this capacitor C8.In the time of the common use of lamp 1, export the direct voltage that lead-out terminal TL1 is high potential compared with lead-out terminal TL2, therefore not conducting of this capacitor C8 from lead-out terminal TL1, the TL2 of power supply unit 80.Thereby, maintain the insulation between lead-out terminal TL1 and housing 60.On the other hand, when apply alternating voltage between lead-out terminal TL1 and housing 60 in the time that dielectric voltage withstand is tested time, capacitor C8 brings into play function with resistance as dividing potential drop.

Action specification in the test of <3> dielectric voltage withstand

According to the benchmark in the industry of the standard with reference to EN609687 bar, in the dielectric voltage withstand test (test that the current value flowing through to make to apply under the shell 71 of socket 70 and the state of eyelet 72 short circuits the alternating voltage (frequency: 60Hz) of 4kV between socket 70 and housing 60 time is measured, with reference to Figure 10) in, if insulation breakdown and flashover all do not produce, can be considered as having guaranteed the fail safe as lamp.

(a) of Fig. 7 be between the output of power supply unit 80 and housing 60 insulation, with the dielectric voltage withstand test of the lamp (following, to be called the related lamp of comparative example) that structure was identical in the past in action specification figure.

In the related lamp of comparative example, extreme large compared with the resistance of the resistance between light emitting module 10, particularly illuminating part 13 and housing 60 and power supply unit 80, light emitting module 10 inside.Thereby in dielectric voltage withstand test, when apply the alternating voltage of 4kV between socket 70 and housing 60 time, voltage concentrates between light emitting module 10 and housing 60, causes producing insulation breakdown between illuminating part 13 and housing 60.

(b) of Fig. 7 is the action specification figure being connected between the output of power supply unit 80 and housing 60 in the dielectric voltage withstand test of the lamp 1 that the capacitor C8 of 3300pF forms.

In lamp 1, apply the alternating voltage of 4kV between to socket 70 and housing 60 time, between illuminating part 13 and housing 60, flow through the electric current of 1.5mA.This current value is current value target, that insulation breakdown and flashover all do not produce that can be considered as the fail safe of guaranteeing above-mentioned lamp.That is to say, compared with the lamp related with comparative example, the related lamp 1 of present embodiment significantly improves the performance of dielectric voltage withstand test.

This is due in the related lamp 1 of present embodiment, make to have capacitor C8 between the lead-out terminal TL1 of power supply unit 80 and housing 60, in the time that dielectric voltage withstand is tested, to applying by capacitor C8 the voltage being applied between socket 70 and housing 60 carried out to the voltage that dividing potential drop obtains, reduced thus the voltage being applied between illuminating part 13 and housing 60 between illuminating part 13 and housing 60.Thus, be suppressed at the insulation breakdown producing between illuminating part 13 and housing 60, and can be minimum by the current value control of flowing through housing.Thereby, the position relationship between illuminating part 13 and housing 60 is not changed and just can be reduced in dielectric voltage withstand test and time be applied to the voltage between illuminating part 13 and housing 60, therefore can realize the raising that maintains and realize the performance that dielectric voltage withstand is tested of light distribution characteristic.

In addition, according to lamp 1, there is the structure identical with the lamp towards in Japan of rated voltage 100V to 120V along with possessing for providing the socket 70 of electric power from external power source to power supply unit 80, and the lamp towards external that can make rated voltage 220V to 277V meets the performance requiring in dielectric voltage withstand test, (for example between socket 70 and housing 60, apply the alternating voltage of 4kV, frequency 60Hz) time insulation breakdown and flashover all do not produce this benchmark, therefore the lamp towards in Japan with in external lamp, can make commonization of component specification, therefore can realize the reduction of manufacturing cost.

And, by testing and suitably select capacitor 80c (C8) according to various dielectric voltage withstands, can realize the raising of the performance to this dielectric voltage withstand test.

In addition, in above-mentioned dielectric voltage withstand test, in the case of the capacity of capacitor C8 is made as 3300pF, between its two ends, apply the voltage of about 1.2kV.At this, can roughly ignore the internal resistance of socket 70 and housing 60, therefore between input terminal TP1, the TP2 of power supply unit 80 and lead-out terminal TL1, TL2, apply the voltage of about 2.8kV.And, think that the voltage that is applied to the 2.8kV between input terminal TP1, TP2 and lead-out terminal TL1, the TL2 of power supply unit 80 almost concentrates between the primary coil T11 of the transformer T1 that flyback converter 81b comprises and secondary coil T12 and between the two ends of capacitor C6.That is to say, in power supply unit 80, owing to comprising transformer T1, in the time that dielectric voltage withstand is tested, voltage, because transformer T1 declines to a great extent, therefore can significantly reduce the voltage being applied between illuminating part 13 and housing 60 in the time that dielectric voltage withstand is tested.At this, the capacity of capacitor C8 is made as to 3300pF, but the distance between balance, light emitting module and the housing of impedance when its capacity can be tested according to dielectric voltage withstand and power supply unit is suitably set.For example, in the case of the power supply unit 80 of present embodiment, if the capacity of capacitor C8 is 1000pF, dielectric voltage withstand test is defective, and 2200pF is qualified above if.That is, capacity more dielectric voltage withstand more improves, but this size that is capacitor becomes large direction, and therefore the upper limit of capacity decides according to space configuration, is to 4700pF in the situation that of present embodiment.

And, as mentioned above, in dielectric voltage withstand test, capacitor C8 is applied the 4kV as test voltage is carried out to the voltage that dividing potential drop obtains, therefore need the capacitor that uses proof voltage high.More than proof voltage need to be made as the voltage that is applied to capacitor, therefore if more than the 3300pF of present embodiment selects 1.2kV, preferably selecting proof voltage is as the element more than 4kV of test voltage.

In addition, in the present embodiment capacitor C8 is arranged on circuit substrate 80a, if but can realize in the structure aspects of lamp, do not need to be arranged on circuit substrate, for example can also be configured to double as the wiring that lead-out terminal TL1 is connected with housing 60.Upper by as in the present embodiment capacitor C8 being arranged on to circuit substrate 80a, except can reducing parts number of packages, also there is configuration can make to manufacture time, process simple this advantage.

In addition, as shown in Fig. 5 (b), in lamp 1, be formed with the elongated slit 80a1 extending in the inner side of circuit substrate 80a on the length direction of circuit substrate 80a.This slit 80a1 is being formed with the region of primary coil lateral circuit 81b1 and is being formed with between the region of secondary coil lateral circuit 81b2 on circuit substrate 80a.Thus, prevent between the wiring pattern of a part of formation primary coil lateral circuit and the wiring pattern of a part for formation secondary coil lateral circuit, producing creeping discharge in circuit substrate 80a.Thus, the performance of the dielectric voltage withstand test to lamp 1 further improves.

< variation >

(1) in execution mode, illustrated that capacitor 80c is electrically connected the example of the lamp 1 forming with housing 60 via screw 86, but be not limited thereto.Example as shown in Figure 8, can be to be also electrically connected the lamp 2 forming with housing 60 via power-feed connector 82a.

(a) of Fig. 8 illustrates the vertical view under the state that takes off lampshade 30 and the second reflecting member 50 of the related lamp of this variation 2, and Fig. 8 (b) illustrates major part key diagram.

As shown in Fig. 8 (a), in this variation, on power-feed connector 82a, be connected with twisted-pair feeder wiring 82 and be connected with the lead-in wire 84 being connected with terminal TE1.

At this, as shown in Fig. 8 (b), power-feed connector 82a possesses three grooves.And, about power supply terminal 11b, be connected with the illuminating part 13 of light emitting module 10 corresponding to two sockets of twisted-pair feeder wiring 82, be electrically connected with housing 60 corresponding to the socket of lead-in wire 84.The housing that is welded on housing 60 corresponding to lead-in wire 84 socket and an end of this power supply terminal 11b is connected and is connected with the other end of go between (not shown).At this, connect with going between and form the linkage unit that capacitor 80c is electrically connected with housing 60 with lead-in wire 84, power-feed connector 82a, power supply terminal 11b and housing.

(2) the lead-out terminal TL1 having illustrated in execution mode at power supply unit 80 and and the terminal TE1 that is electrically connected of housing 60 between be connected the example of capacitor C8, but be not limited thereto.For example, also can contact resistance.Or, also can connection metal oxide voltage-sensitive resistance, the surge absorber such as discharging gap.

(3) example of the lamp 1 that possesses the first reflecting member 40 and the second reflecting member 50 being described in execution mode, but being not limited thereto, can be also the lamp that does not possess the first reflecting member 40, the second reflecting member 50.

(4) example that power supply unit 80 comprises flyback converter has been described in execution mode, but has been not limited thereto.For example, can be also that power supply unit 80 comprises the flyback converters such as Buck-Boost converter DC-DC converter in addition.

(5) in execution mode, illustrated that illuminating part 13 has the example of light-emitting diode, but be not limited thereto, also can there is other the light-emitting component such as EL element.

(6) in execution mode, illustrated by the power-actuated light emitting module of direct current and power supply unit thereof, but can be also to there is rectified action in inside respectively and can be by the combination of the power-actuated light emitting module of alternating current and power supply unit thereof.

(7) in execution mode, recorded for example the lamp of bulb-shaped, but as the variation of the shape of lamp, even the such shape of Figure 11, by adopting same structure also can improve dielectric voltage withstand.

Below, key diagram 9.The lamp of Fig. 9 is the lamp using as the pendent lamp of slim shape, does not have such shell, the eyelet of socket 70 of bulb-shaped, but instead has power supply 271,273 and fixed part 270.These power supplies 271,273 play the function relevant with power supply of shell, eyelet, and fixed part 270 plays the function that lamp is fixed on to socket.Power supply 271,273 is connected with power supply unit 280 by wiring, is provided for the light emitting module 210 of plate shape from the output of power supply unit.Light emitting module 210 is accommodated in the housing 260 being made up of metal with power supply unit 280 and reflecting member 240.

In addition, the cover 230 being formed by resin with light transmission etc. is installed in the front of housing 260.And, the light transmission cover 230 penetrating from light emitting module 210 and emit to outside.

In the such lamp of this structure, similarly, need under the state that makes two power supply short circuits, guarantee the dielectric voltage withstand between power supply and housing.If housing 260 is insulating material, can easily guarantee dielectric voltage withstand, in the situation that adopting metal shell due to light emitting module heat radiation, by and execution mode dividing potential drop element is similarly set between the output from power supply unit and metal shell can guarantees dielectric voltage withstand.

Utilizability in industry

It is all that the related lamp of the utility model can extensively be used in lighting use.

Description of reference numerals

1,2: lamp; 10: light emitting module; 11: module substrate; 13: illuminating part; 20: base station; 26: screw hole; 30: lampshade; 40: the first reflecting members; 50: the second reflecting members; 60: housing; 70: socket; 71: shell; 72: insulation division; 73: eyelet; 80: power supply unit; 81a: rectifier smoothing circuit; 81b: flyback converter; 81b1: primary coil lateral circuit; 81b2: secondary coil lateral circuit; 82: twisted-pair feeder wiring; 84,88a, 88b: lead-in wire; 86: screw.

Claims (8)

1. a light source, is characterized in that, possesses:

Power supply unit, its output power;

Light emitting module, it has module substrate and is installed on the illuminating part of this module substrate, and this light emitting module is connected with the output of above-mentioned power supply unit and receives and provide from the electric power of above-mentioned power supply unit;

Housing, it is formed by conductive material, and this housing receives above-mentioned power supply unit in inside and ground connection adjacent with above-mentioned light emitting module is configured;

Socket, its electric power being arranged on from external power source to above-mentioned power supply unit provides path; And

Dividing potential drop element, one is distolateral to be electrically connected with the output of above-mentioned power supply unit and another distolateral and above-mentioned housing is electrically connected, and in the time that dielectric voltage withstand is tested, the voltage being applied between above-mentioned socket and above-mentioned housing is carried out to dividing potential drop.

2. light source according to claim 1, is characterized in that,

Above-mentioned dividing potential drop element is capacitor, resistance or surge absorber.

3. according to the light source described in claim 1 or 2, it is characterized in that,

Also possess linkage unit, this linkage unit is for being electrically connected above-mentioned dividing potential drop with above-mentioned another distolateral and above-mentioned housing of element.

4. light source according to claim 3, is characterized in that,

Above-mentioned linkage unit is made up of following part:

Base station, it is formed as tabular by conductive material, install sealing under the part of a side opening portion for above-mentioned housing and the state that contacts with above-mentioned housing;

Screw, it is formed by conductive material, and for above-mentioned light emitting module is fixed on to above-mentioned base station; And

Lead-in wire, it is an end and above-mentioned another distolateral is electrically connected and the other end is electrically connected and forms with above-mentioned screw of above-mentioned dividing potential drop element.

5. light source according to claim 3, is characterized in that,

Above-mentioned linkage unit is made up of following part:

Terminal, it is configured on above-mentioned module substrate and with above-mentioned housing and is electrically connected; And

Lead-in wire, it is an end and above-mentioned another distolateral is electrically connected and the other end and above-mentioned terminal are formed by connecting of above-mentioned dividing potential drop element.

6. according to the light source described in claim 1 or 2, it is characterized in that,

Above-mentioned power supply unit has circuit substrate, and this circuit substrate comprises that flyback converter forms, and this flyback converter makes to input distolateral and output end electric insulation by transformer and forms.

7. light source according to claim 6, is characterized in that,

Foregoing circuit substrate be be formed with the primary coil that comprises above-mentioned transformer circuit region and be formed with and between the region of circuit of the secondary coil that comprises above-mentioned transformer, be formed on the slit connecting on thickness direction and form.

8. according to the light source described in claim 1 or 2, it is characterized in that,

Rated voltage is 220V to 250V.