JP2011003398A - Lamp with base and lighting fixture - Google Patents

Abstract

Provided are a lamp with a cap and a lighting fixture capable of disabling a lighting device when the temperature of electronic components constituting a light emitting element and the lighting device exceeds a predetermined reference value.
A light-emitting element; and a heat-conducting body having a support portion for disposing the light-emitting element at one end and a housing recess at the other end; and a lighting circuit for the light-emitting element. A lighting device B having a circuit board 13 on which an electronic component to be mounted is mounted and disposed in a housing recess of the main body; and mounted on a position close to the light emitting element of the circuit board to detect the temperature of a predetermined electronic component A lamp with a base comprising: an operation stop means 15 for disabling the lighting device when the temperature exceeds a predetermined reference value; and a base member 16 provided at the other end of the main body and connected to the lighting device. 10 is configured.
[Selection] Figure 1

Description

  The present invention relates to a lamp with a cap and a lighting fixture using a light emitting element such as a light emitting diode as a light source.

  In recent years, lamps with caps such as bulb-type LED lamps that use light-emitting diodes, which are semiconductor light-emitting elements with long life and low power consumption, have been adopted as light sources for various lighting fixtures, instead of filament bulbs. It is coming.

  On the other hand, the light emitting diode has to emit heat because its luminous efficiency decreases with increasing temperature. In addition, the lighting circuit component of the light emitting diode may deteriorate due to a temperature rise, and the reliability of the component may be reduced. For this reason, for example, as disclosed in Patent Document 1, heat generated by the light emitting diode is radiated and heat generated by the electronic component is also radiated. That is, paragraph number [0022] includes a light source module on which a plurality of white LEDs are mounted, a dome-shaped translucent part that covers the light source module, a heat radiating part for radiating heat generated by the light source module, and a light source module Illuminating device including a drive circuit unit having a plurality of drive circuit components for driving the power supply unit and a base unit electrically connected to the drive circuit unit is shown. It has been shown that it is possible to dissipate not only the heat of the light source module having a plurality of LEDs but also the heat of the drive circuit section.

JP 2009-4130 A

  According to Patent Document 1, the heat of the light emitting diode and the electronic component can be radiated. However, when the electronic component is abnormal, for example, when the transistor is destroyed and the collector-emitter terminals are short-circuited, the light emitting diode or the like Overcurrent flows, and it is not possible to suppress the temperature rise only by heat radiation from the heat radiating part.If it continues to be used as it is, the temperature of the electronic parts rises, causing deterioration and damage of the parts, There is a risk of melting of resin parts. In particular, when a synthetic resin glove is provided, there is a problem that the glove is deformed or discolored.

  The present invention has been made in view of the above problems, and a base capable of disabling the lighting device when the temperature of the electronic components constituting the light emitting element and the lighting device exceeds a predetermined reference value. It intends to provide an attached lamp and a lighting fixture.

  The invention of the lamp with a cap according to claim 1 includes: a light emitting element; a main body having thermal conductivity in which a support part for disposing the light emitting element is formed at one end and a housing recess is formed at the other end; A lighting device disposed in a housing recess of a main body having a circuit board on which electronic components constituting an element lighting circuit are mounted; and a predetermined electronic component mounted on a position close to the light emitting element of the circuit board An operation stop means for detecting the temperature and disabling the lighting device when the temperature exceeds a predetermined reference value; a base member provided at the other end of the main body and connected to the lighting device; It is characterized by being. According to the present invention, when the temperature of the electronic components constituting the light emitting element and the lighting device exceeds a predetermined reference value, the lighting device can be deactivated by the operation stopping means.

  In the present invention, the lamp with cap is configured in a light bulb shape (A shape), a reflex shape (R shape), a ball shape (G shape), a cylindrical shape (T shape) or the like that approximates the shape of a general incandescent light bulb. Also good. Furthermore, it may constitute a globeless lamp with a base. The present invention is not limited to a lamp with a cap approximated to the shape of a general incandescent bulb, but can be applied to lamps with a cap having various other external shapes and uses.

  As the light emitting element, a light emitting element using a semiconductor or the like as a light source, such as a light emitting diode, an organic EL, or a semiconductor laser, is allowed. It is preferable that a plurality of light emitting elements are formed, but the necessary number is selected according to the use of illumination. For example, about four element groups are formed, and one or a plurality of groups are formed. You may comprise. Further, it may be composed of one light emitting element.

  Even if the light-emitting elements are composed of SMD type (Surface Mount Device), using COB (Chip on board) technology, some or all of them are arranged in a regular and regular order such as matrix, staggered or radial. And may be implemented. The light emitting element is preferably configured to emit white light, but may be configured to be red, blue, green, or a combination of various colors depending on the application of the lighting fixture used.

  The main body is preferably formed of a metal including at least one of aluminum (Al), copper (Cu), iron (Fe), and nickel (Ni) having good thermal conductivity. In addition, it may be made of an industrial material such as aluminum nitride (AlN) or silicone carbide (SiC), or may be made of a synthetic resin such as a high thermal conductive resin. Appearance shape can be formed in a shape that approximates the silhouette of the neck part of a general incandescent bulb so that the diameter gradually decreases from one end to the other. Although it is preferable to improve, here, it is not a condition to approximate a general incandescent lamp, and it is not limited to a limited specific external shape.

  Even if the circuit board on which the electronic components constituting the lighting circuit of the light emitting element are mounted is made of a non-metallic material such as a glass epoxy material, a paper phenol material, a glass composite, etc. You may be comprised with the metal with favorable heat conductivity. Further, it may be made of ceramics. In order to achieve downsizing, it is preferable that the circuit board of the lighting device is disposed vertically in the housing recess substantially along the central axis direction of the main body. May be good. The internal state in which the circuit board of the lighting device is disposed in the housing recess of the main body is airtight so as to prevent the intrusion of dust and the like. You may communicate.

  As the lighting device, for example, one that constitutes a lighting circuit that converts an AC voltage of 100 V into a DC voltage of 24 V and supplies the converted voltage to the light emitting element is allowed. Further, the lighting device may have a light control circuit for dimming the light emitting element. The lighting device may be entirely housed and disposed in the housing recess of the main body, or may be partially housed in a base member provided at the other end of the main body.

  An operation stop means that is mounted near the light emitting element of the circuit board, detects the temperature of a predetermined electronic component, and deactivates the lighting device when the temperature exceeds a predetermined reference value, for example, a temperature fuse Although it is preferable to simplify the configuration, it is preferable that the lighting device is configured to be simpler, but the lighting device is more reliably disabled. In order to operate, a temperature sensor that detects the temperature of an electronic component detects an abnormal state when the temperature exceeds a predetermined reference value, and this detection signal is sent to a control unit configured by a microcomputer or IC of a lighting device. Then, the control unit may generate a stop signal for the lighting circuit based on the transmitted detection signal, stop the operation of the lighting device, and forcibly enter the astigmatic mode.

 These operation stop means are located on the back side of the transistor mounted on the circuit board so as to detect the temperature of the electronic component that particularly generates heat, for example, the transistor that controls the lighting of the light emitting diode, and the transistor and the operation stop means The circuit board may be disposed between them, or may be disposed in contact with the outer surface of the transistor. Furthermore, the temperature of the electronic component is not directly detected, but the ambient temperature around the electronic component, in other words, the ambient temperature in the housing recess of the main body in which the lighting device is disposed is detected. You may comprise so that temperature may be detected indirectly.

  The operation stop means is arranged close to the electronic component that detects the temperature, and is also arranged close to the light emitting element so that the temperature of the light emitting element can be detected, and the temperature of both the electronic component and the light emitting element is detected. It is preferable to arrange them as possible.

  As the base member, all bases that can be attached to a socket to which a general incandescent light bulb is attached are allowed, but generally, the most widely used bases such as Edison type E26 type and E17 type are suitable. In addition, even if the material is a metal base as a whole, the electrical connection part is made of a metal such as a copper plate, and the other part is a plastic base made of a synthetic resin. It may be a base having a pin-shaped terminal used for a fluorescent lamp or a base having an L-shaped terminal used for hook sealing, and is not limited to a specific base.

  According to a second aspect of the present invention, in the lamp with a cap according to the first aspect, the operation stop means is disposed in contact with an electronic component. According to the present invention, when the temperature of the electronic components constituting the light emitting element and the lighting device exceeds a predetermined reference value, the lighting device can be more reliably deactivated.

  In the present invention, the operation stopping means is preferably disposed so as to contact the temperature of the electronic component so as to be detected with priority, but may be disposed so as to be able to detect the temperature of the light emitting element with priority. Further, the priority may be eliminated, and the operation stopping means may be arranged with a thermal equal distance from the electronic component and the light emitting element. The operation stopping means may be disposed in direct contact with the electronic component, or may be disposed in contact with an adhesive or sheet having good thermal conductivity.

  According to a third aspect of the present invention, in the lamp with a cap according to the first or second aspect, the electronic component is thermally connected to the surface of the housing recess of the main body through a heat conducting member. . According to the present invention, it is possible to effectively dissipate heat from the electronic component, and when the temperature of the electronic component constituting the light emitting element or the lighting device exceeds a predetermined reference value, the lighting device is deactivated. It becomes possible to do.

  In the present invention, the heat conductive member is made of, for example, a heat-resistant silicone resin having good heat conductivity and electrical insulation, a synthetic resin such as an epoxy resin or a urethane resin, and these resins are mounted on a circuit board. It is preferable to fill and thermally connect between the electronic component and the surface of the housing recess of the main body, but the material is not limited to these synthetic resins, but a metal plate with good thermal conductivity such as aluminum or copper, etc. The electronic component and the surface of the housing recess of the main body may be interposed and connected, or further, these metals and a synthetic resin may be combined and connected. Further, the heat conduction member covers the entire electronic component including the operation stopping means, in other words, covers almost the entire circuit board and fills it with the housing recess, or particularly generates an electronic component. Alternatively, for example, only the transistor or the vicinity of the transistor including the vicinity of the cover may be filled with the surface of the housing recess. The operation stopping means is preferably covered with the heat conducting member, but may not be covered.

  Furthermore, the thermal connection between the electronic component and the surface of the storage recess by the heat conducting member is performed by, for example, forming a protrusion on the surface of the storage recess, forming a protrusion on the circuit board, and further, Even if the distance between the electronic component and the surface of the storage recess is closer to each other by means such as forming protrusions on both surfaces of the storage recess, the thermal conductivity may be further increased. Good. You may make it increase the contact area with a heat conductive member by forming the surface in these protrusion parts in a concave shape, or forming an uneven | corrugated | grooved part.

  The invention of the lighting fixture according to claim 4 comprises: a fixture main body provided with a socket; and a lamp with a cap according to any one of claims 1 to 3 attached to the socket of the fixture main body. It is characterized by that. According to the lighting fixture of the present invention, when the temperature of the light emitting element of the lamp with cap that serves as the light source of the fixture or the electronic components constituting the lighting device exceeds a predetermined reference value, the lighting device is deactivated. Is possible.

  In the present invention, the lighting fixture may be directly attached to the ceiling, suspended from the ceiling, or mounted on the wall, or a ceiling-embedded downlight. Even if a glove, a shade, a reflector or the like is attached to the instrument body as a light control body, a lamp with a cap may be exposed. Further, the lighting fixture is not limited to one having a lamp with a base attached to the fixture body, and a plurality of lighting fixtures may be attached. Furthermore, you may comprise large luminaires for facilities and business, such as offices.

  According to the first aspect of the present invention, the base capable of disabling the lighting device when the temperature of the electronic components constituting the light emitting element and the lighting device exceeds a predetermined reference value by the operation stop means. An attached lamp can be provided.

  According to the invention of claim 2, the operation stopping means is disposed in contact with the electronic component, so that when the temperature of the electronic component constituting the light emitting element or the lighting device exceeds a predetermined reference value, the lighting is stopped. It is possible to provide a lamp with a base that can more reliably deactivate the device.

  According to the invention of claim 3, since the electronic component is thermally connected to the surface of the housing recess of the main body through the heat conducting member, the electronic component can be effectively radiated and light emitted. When the temperature of the electronic component which comprises an element and a lighting device exceeds predetermined reference value, the lamp | ramp with a nozzle | cap | die which can make a lighting device non-operation can be provided.

  According to a fourth aspect of the present invention, there is provided an electronic device that constitutes a light emitting element or a lighting device of a cap-attached lamp serving as a light source of the fixture by the lamp with a cap attached to the socket of the fixture body. When the temperature of a component exceeds a predetermined reference value, it is possible to configure a safe lighting fixture that can reliably deactivate the lighting device.

The lamp | ramp with a nozzle | cap | die which is embodiment of this invention is shown, (a) is a longitudinal cross-sectional view, (b) is sectional drawing which shows the principal part seen from the right (R) direction in (a) figure. The circuit diagram which similarly shows the lighting circuit of a lighting device. Sectional drawing which shows schematically the state which installed the lighting fixture which similarly equipped with the lamp | cap | die with a nozzle | cap | die on a ceiling surface. Similarly, the 1st modification of a lamp | ramp with a nozzle | cap | die is shown, (a) is a longitudinal cross-sectional view, (b) is sectional drawing which shows the principal part seen from the right (R) direction in (a) figure. The circuit diagram which shows the 2nd modification of a lamp | ramp with a base similarly, and shows the lighting circuit of a lighting device. Similarly, the 3rd modification of a lamp | ramp with a nozzle | cap | die is shown, (a) is a longitudinal cross-sectional view, (b) is sectional drawing which expands and shows the A section in (a) figure.

  Hereinafter, an embodiment of a lamp with a cap and a lighting fixture according to the present invention will be described.

  As shown in FIG. 1, this embodiment constitutes a light bulb-shaped lamp 10 with a base, a light emitting element 11, a main body 12 having a light emitting element disposed at one end, and an electronic component constituting a lighting circuit of the light emitting element. Has a circuit board 13 mounted thereon, a lighting device B provided in the main body, an insulating case 14 provided so as to be interposed between the circuit board and the main body, and an operation stopping means 15 for detecting the temperature of the electronic component. The base member 16 is provided at the other end of the main body.

  The light emitting element 11 is composed of a semiconductor light emitting element, in this embodiment a light emitting diode (hereinafter referred to as “LED”), and a plurality of LEDs 11 having the same performance, in this embodiment, four LEDs 11 are prepared. In this embodiment, the LED comprises a blue LED chip and a high-intensity, high-power SMD LED that emits white light by a yellow phosphor excited by the blue LED chip, and further, in one direction, that is, along the optical axis of the LED. Light rays are mainly emitted. Here, the optical axis is substantially perpendicular to the surface of the light emitting unit circuit board 11a on which the LEDs 11 are mounted.

  The light emitting element 11 is configured to be mounted on the light emitting unit circuit board 11a. The light-emitting portion circuit board is made of a metal having good thermal conductivity, which is a flat, substantially disk-shaped aluminum in this embodiment, and an electric insulating layer such as a silicone resin on its surface (upper surface in FIG. 1). A wiring pattern made of copper foil is formed on the wiring pattern, and the four LEDs 11 are mounted and arranged on the wiring pattern at substantially equal intervals so as to form a substantially concentric circle. Each LED 11 is connected in series by a wiring pattern.

  Further, the light emitting unit circuit board 11a is formed with a through hole 11b penetrating the wiring pattern and the electrical insulating layer. The through hole is a through hole through which the electric wire w for supplying power to the LED 11 is inserted from the back surface to the front surface of the light emitting unit circuit board and connected to the electrical connecting unit 11c, and the central axis xx is the light emitting unit. The circuit board 11a is formed so as to be separated from the center of the circuit board 11a (the central axis yy of the main body 12) by a dimension t1 at a position displaced in the outer peripheral direction on the surface of the light emitting unit circuit board. An electrical insulating layer is formed on the back surface of the light emitting unit circuit board 11a. Instead of this insulating layer, an insulating sheet may be attached as necessary.

  The LED 11 mounted on the light emitting unit circuit board 11 a as described above is disposed at one end of the main body 12. The main body 12 is made of a metal having good thermal conductivity, which is aluminum in this embodiment, has a substantially circular cross section, an opening 12a having a large diameter at one end, and an opening 12b having a small diameter at the other end. Is formed integrally with the storage recess 12c, and the outer peripheral surface has a substantially conical tapered surface with a diameter gradually decreasing from one end to the other end, so that the appearance approximates the silhouette of the neck portion of a general incandescent bulb. Configure in shape. A large number of heat dissipating fins 12d projecting radially from the one end to the other end about the central axis yy are integrally formed on the outer peripheral surface. These main bodies 12 are configured as main bodies having a predetermined heat capacity with a thickness of aluminum which is processed by, for example, casting, forging or cutting.

  The opening 12a at one end of the main body 12 is integrally formed with a support portion 12f having a smooth surface so that a recess 12e is formed, and a light emitting portion circuit board 11a in which the LED 11 is mounted in the recess. Arranged. That is, the back surface side of the light emitting circuit board is closely attached to the smooth support portion 12f via an insulating sheet or adhesive made of a silicone resin having thermal conductivity and electrical insulation, and supported by fixing means such as screws. To do. Thereby, the optical axis zz of the light source body composed of the LED 11 and the light emitting unit circuit board 11a substantially coincides with the central axis yy of the main body 12, and the light source unit A having a substantially circular light emitting surface as a whole in plan view. Is configured.

  Further, an insertion hole 12g is formed through the power supply wire w penetrating substantially along the central axis yy direction from the center portion of the support portion 12f toward the opening portion 12b at the lower end portion. The insertion hole has a center axis xx (a center axis xx of the through hole 11b) that is concentrically connected to the through hole 11b formed in the light emitting circuit board 11a. -Y is formed at a position displaced in the outer circumferential direction by a dimension t1.

  The housing recess 12c formed integrally with the other end of the main body 12 is a recess for disposing the lighting device B having the circuit board 13 therein, and the cross section is centered on the central axis yy of the main body 12 The insertion hole 12g mentioned above is penetrated in the bottom face 12c1 (surface located in the upper part in the figure) of the recess. An insulating case 14 is fitted in the housing recess 12c in order to achieve electrical insulation between the circuit board 13 of the lighting device B and the main body 12 made of aluminum.

  The insulating case 14 is made of a heat-resistant and electrically insulating synthetic resin such as PBT (polybutylene terephthalate), and has an opening 14a at one end (lower end in the figure) and the other end (upper end in the figure). Part 14) is formed in a cylindrical shape with both ends open, which substantially matches the shape of the inner surface of the housing recess 12c of the main body 12.

  The insulating case 14 is integrally formed with a locking portion 14c that is positioned substantially in the middle of the outer peripheral surface and protrudes so as to form a ring-shaped ridge. A portion that protrudes first (downward in the drawing) from the locking portion is formed integrally with a base attaching portion 14d having a stepped outer periphery. A guide groove 14e is integrally formed on the inner surface of the insulating case 14 along the axial direction of the cylinder, and a flat circuit board 13 is formed in the guide groove in the vertical direction, that is, substantially in the central axis yy of the main body 12. It is fitted and supported along the parallel. The guide groove 14e is formed so as to be offset from the axis of the insulating case 14 that forms a cylinder, in other words, from the central axis yy of the main body 12 to the side of the insertion hole 12g and the through hole 11b through which the electric wire w is inserted. Then, the circuit board 13 is inserted and fitted in the guide groove 14e formed so as to be offset.

  The circuit board 13 constitutes the lighting device B on which electronic components constituting the lighting circuit 19 of the LED 11 are mounted. A relatively large component 13a such as an electrolytic capacitor made of a glass epoxy material is provided on one side (right side in the figure). A small chip component, a component 13b that generates heat relatively, such as a transistor 13b1, is mounted on the other surface (left side in the figure). When the circuit board 13 on which these electronic components are mounted is inserted into the guide groove 14e of the insulating case 14 in the vertical direction, the chip component or the chip component or the like is placed in a narrow space, that is, a space on the side where the insertion hole 12g and the through hole 11b are present. The part 13b with relatively heat generation is positioned in the transistor 13b1 and the like, and the large part 13a is positioned in the other wide space and inserted and fitted. When the electronic component is mounted on the circuit board 13, the component 13b that generates heat relatively in the transistor 13b1 or the like is mounted in advance so as to face the side having the insertion hole 12g and the through hole 11b.

  In the figure, reference numeral 15 denotes an operation stop means which is mounted at a position close to the LED 11 on the circuit board 19 to detect the temperature of a predetermined electronic component and deactivate the lighting device B when the temperature exceeds a predetermined reference value. In this embodiment, as shown in the lighting circuit 19 in FIG. 2, the temperature fuse is blown when the detected temperature exceeds a predetermined reference value, and the operation of the lighting device B is stopped to forcibly operate the astigmatism mode. To.

  As schematically shown in FIG. 2, the lighting circuit 19 rectifies and smoothes the AC voltage 100 V of the commercial power source E by the diode bridge DB and the smoothing capacitor C <b> 1, converts it to a DC voltage 24 V, and supplies it to each LED 11. R1 is a chip resistor that sets the current flowing through each LED 11, 13b1 is a transistor for controlling the lighting of the LED 11, and the base potential of this transistor 13b1 is set by a chip resistor R2 and a Zener diode D. Further, 15 is a temperature fuse, and F is a current fuse.

  Thereby, when the power is supplied from the commercial power source E, the AC voltage 100V is converted to the DC voltage 24V by the diode bridge DB and the smoothing capacitor C1, and the voltage set by the chip resistor R2 and the Zener diode D is applied to each LED11. Then, when the current controlled by the transistor 13b1 flows to each LED 11, each LED lights up and emits light. At the same time, the temperature fuse 15 constantly senses and detects the temperature of the transistor 13b1 and the LED 11, and blows when the detected temperature exceeds a predetermined reference value, shuts off the circuit on the input side of the LED 11, and Stop operation.

  Further, the thermal fuse 15 is arranged close to the electronic component as follows. That is, as shown in FIG. 1, the electronic component that generates heat particularly, in this embodiment, is mounted facing the narrow side of the circuit board 13 so as to sense and detect the temperature of the transistor 13b1 that controls the lighting of each LED 11. The thermal fuse is mounted and arranged above the circuit board so that the circuit board 13 is interposed between the transistor and the thermal fuse 15 and is located on the back side of the transistor 13b1. Thus, the thermal fuse 15 is mounted so as to face the wide space side of the circuit board 13 and is disposed so as to sense the temperature of the transistor 13b1 via the circuit board 13. Further, the thermal fuse 15 is arranged on the circuit board 13 so that a part of the upper end portion 15a is slightly protruded from the opening portion 14b of the other end portion (upper end portion in the figure) of the insulating case 14.

  Thus, when the circuit board 13 is vertically accommodated in the insulating case 14, the insulating case provides electrical insulation between the body 12 made of aluminum and the circuit board 13, and at the same time, the thermal fuse 15 is automatically insulated. The upper end portion 15a is positioned so as to face and approach the bottom surface 12c1 of the housing recess 12c of the main body 12. In this embodiment, the upper end portion 15a of the thermal fuse 15 is substantially positioned on the central axis yy of the main body 12, and the gap dimension t2 between the upper end portion 15a and the bottom surface 12c1 of the housing recess 12c is set to about 7 mm. did. As a result, the thermal fuse 15 is mounted at a position close to the LED 11 on the circuit board 13 and can be attached to a location where the temperature of the transistor 13b1 and the temperature of the LED 11 can be sensed at the shortest distance. The temperature can be detected, and the temperature of the LED 11 can also be detected from the support portion 12f of the main body 12 made of aluminum through the bottom surface 12c1 of the housing recess 12c.

  Further, between the electronic components, in particular, the heat generating component 13b including the transistor 13b1 and the thermal fuse 15, and the upper inner surface of the housing recess 12c of the main body 12, an electrical insulation made of a heat conductive member, in this embodiment, a silicone resin. The heat-resistant adhesive 17 having the property is filled. The adhesive 17 is filled so as to embed the space portion s formed by the bottom surface 12c1 of the storage recess 12c and the opening portion 14b of the insulating case 14 and its periphery. As a result, the heat-generating component 13b and the thermal fuse 15 including the transistor 13b1 are electrically insulated from the aluminum main body 12 and the circuit board 13 by the adhesive 17 made of silicone resin having good thermal conductivity, and the main body. The circuit board 13 itself is fixed to the insulating case 14 by the adhesive 17, and the insulating case 14 is firmly fixed to the main body 12. The output terminal of the circuit board 13 is connected to an electric wire w for power supply to the LED, and the input terminal is connected to an input line (not shown) connected to the base member 16.

  The insulating case 14 is further fitted with a base member 16 on the outer peripheral surface of the base attaching part 14d protruding from the opening 12b at the other end of the main body 12, and a heat-resistant adhesive such as caulking or silicone resin or epoxy resin. Use to fix. Thereby, the external shape of the outer peripheral surface extending from the main body 12 to the base member 16 is configured to approximate a neck silhouette in a general incandescent lamp.

  The base member 16 is an Edison type E26 type, and includes a cylindrical shell portion 16a having a thread and an eyelet portion 16c provided on the top of the lower end of the shell portion via an insulating portion 16b. The opening portion of the shell portion 16a is fitted into the base attaching portion 14d of the insulating case 14 and is fixed by adhesion or caulking. As a result, the main body 12 made of aluminum and the base member 16 are electrically insulated. An input line derived from an input terminal of the circuit board 13 is connected to the shell portion 16 a and the eyelet portion 16 c of the base member 16.

  In addition, 14f in FIG. 1 is a pair of protrusions integrally formed on the inner side surface of the insulating case 14, and engages with the engaging groove 12c2 formed on the inner side surface of the storage recess 12c. The cap member 16 is prevented from dropping from the housing recess 12c.

  In the figure, reference numeral 18 denotes a glove that constitutes the translucent cover member. For example, the glove is made of a material such as thin glass or synthetic resin, and is made of milky white polycarbonate such as milky white having transparency or light diffusibility. A smooth curved surface approximated to the silhouette of a ball portion of a general incandescent bulb having an opening 18a at one end is formed.

  The globe 18 has a protrusion 18a1 formed at the opening end of the opening 18a so as to cover the light emitting surface of the light source part A of the main body 12, and a step 12j formed around the support 12f of the main body 12. The fitting groove 12j1 is fitted and engaged, and fixed with an adhesive such as silicone resin or epoxy resin, for example. Thereby, while LED11 and its charging part are covered and protected, the outer peripheral surface shape of the main body 12 becomes an external shape which is substantially continuous integrally with the outer peripheral surface shape of the globe 18, and as a general shape, the entire general incandescent bulb It is comprised as the lamp | ramp 10 with a bulb | ball shape of the bulb | ball shape of the shape approximated to this silhouette.

  Next, an assembling procedure of the bulb-type cap-equipped lamp 10 configured as described above will be described. First, the insulating case 14 is fitted into the housing recess 12 c of the main body 12, and the protrusion 14 f of the insulating case 14 is engaged with the engaging groove 12 c 2 of the housing recess 12 and fixed. At this time, a space portion s is automatically formed between the opening portion 14b of the insulating case 14 and the bottom surface 12c1 of the housing recess 12c.

  Next, the circuit board 13 is inserted vertically into the insulating case 14 while passing the electric wire w pre-connected to the output terminal of the circuit board 13 from the opening 14b of the insulating case 14 toward the insertion hole 12g of the main body 12. The guide groove 14e is fitted and supported. At this time, the circuit board 13 is inserted so that the heat generating component 13b faces the insertion hole 12g side of the main body 12. At this time, a gap dimension t2 is automatically formed between the upper end portion 15a of the thermal fuse 15 and the bottom surface 12c1 of the housing recess 12c. The tip of the electric wire w is drawn out from the through hole 11b of the light emitting circuit board 11a on which the LED 11 is mounted.

  Next, the circuit board 13 of the lighting device B is supported in the insulating case 14 and is formed between the opening 14b of the insulating case 14 and the bottom surface 12c1 of the housing recess 12c with the gap dimension t2 formed. The adhesive 17 is injected and filled so as to fill the space portion s and its periphery. Thus, the heat generating component 13b and the thermal fuse 15 including the transistor 13b1 mounted on the circuit board 13 and the inner surface including the bottom surface 12c1 of the housing recess 12c of the main body 12 are connected by the adhesive 17, and the heat conduction path Is formed.

  Next, the light emitting unit circuit board 11a on which the LED 11 is mounted is placed on and closely attached to the support unit 12f of the main body 12, and about four places from the upper surface side (front surface side) are fixed using fixing means such as screws. . At this time, the through hole 11b of the light emitting circuit board 11a and the insertion hole 12g of the main body 12 are aligned and fixed. Thereby, the back surface of the light emitting unit circuit board 11a and the smooth surface of the support unit 12f are in close contact and thermally connected and fixed.

  Next, the electric wire w with one end pulled out from the through hole 11b of the light emitting unit circuit board 11a is bent toward the center of the light emitting unit circuit board and connected to the electric wire connecting part 11c.

  Next, an input line (not shown) derived from the input terminal of the circuit board 13 of the lighting device B is connected to the shell portion 16a and the eyelet portion 16c of the base member 16, and the opening of the shell portion 16a is connected in a connected state. The part is fitted into the base attaching part 14d of the insulating case 14 and fixed with an adhesive.

  Next, a glove 18 is prepared, and the projection 18a1 of the glove opening 18a is fitted into the engagement groove 12j1 formed in the support part 12f of the main body 12 so as to cover the light source part A of the main body 12, and bonded. Fix with an agent. As a result, a lamp having a bulb-shaped cap 10 having a globe at one end and an E26-shaped cap at the other end and having an overall appearance similar to a silhouette of a general incandescent bulb is formed.

  Next, the structure of the lighting fixture which used as a light source the lamp | ramp 10 with a bulb | ball-shaped cap comprised as mentioned above is demonstrated. As shown in FIG. 3, reference numeral 20 denotes an existing downlight-type lighting fixture that is embedded in a ceiling surface X of a store or the like and uses a general incandescent bulb having an E26-type base as a light source, and has an opening 21a on the lower surface. It is composed of a metal case-shaped main body case 21, a metal reflector 22 fitted into the opening 21a, and a socket 23 into which an E26-shaped base of a general incandescent bulb can be screwed. . The reflector 22 is made of, for example, a metal plate such as stainless steel, and a socket 23 is installed at the center of the top plate of the reflector 22.

  In the existing lighting fixture 20 for a general incandescent light bulb configured as described above, a light bulb-shaped lamp with a cap 10 using the above-described LED as a light source is used instead of the incandescent light bulb in order to save energy and prolong the life. That is, since the bulb-shaped lamp with the cap has the cap member 16 formed in the E26 shape, it can be directly inserted into the socket 23 for a general incandescent bulb of the lighting fixture. At this time, the main body 12 of the bulb-shaped lamp with cap 10 has a substantially conical tapered surface, and the appearance is configured to approximate the silhouette of the neck portion of the incandescent bulb. It can be smoothly inserted without hitting the reflector 22 and the like around the socket, and the application rate of the light bulb-shaped lamp with cap 10 to the existing lighting fixture is improved. As a result, an energy saving downlight in which a light bulb-shaped lamp with a base using an LED as a light source is installed.

 Next, the operation of the downlight using the lamp with the cap configured as described above as a light source will be described. When power is applied to the downlight configured as described above, commercial power E is supplied from the socket 23 through the base member 16 of the bulb-shaped lamp with cap 10. As shown in the lighting circuit 19 in FIG. 100V is rectified and smoothed by the diode bridge DB and the smoothing capacitor C1 to be converted into a DC voltage of 24V. A voltage set by the chip resistor R2 and the Zener diode D is applied to each LED 11, and the current controlled by the transistor 13b1 is changed. By flowing to each LED 11, all the LEDs 11 are turned on simultaneously, and white light is emitted.

  At this time, since the four LEDs 11 are mounted on the surface of the light emitting unit circuit board 11a at substantially equal intervals so as to be substantially concentric, the light emitted from each LED 11 is transmitted over the entire inner surface of the globe 18. The light is diffused almost uniformly toward the light, and the light is diffused by the milky white glove, so that illumination having light distribution characteristics similar to those of a general incandescent bulb can be performed.

  In particular, when the light distribution of the bulb-shaped lamp with cap 10 serving as the light source approaches the light distribution of a general incandescent light bulb, the amount of light irradiated to the reflector 22 in the vicinity of the socket 23 arranged in the lighting fixture 20 increases. In addition, it is possible to obtain substantially the appliance characteristics as the optical design of the reflector 22 configured for a general incandescent bulb.

  When the bulb-shaped lamp with cap 10 is turned on, the electronic components of the lighting circuit 19, particularly the heat generating component 13b such as a transistor, generates heat. The generated heat is transmitted to the inner surface of the housing recess 12c via the adhesive 17, and is radiated from the thick main body 12 made of aluminum to the outside air via the radiation fins 12d. At this time, since the heat generating component 13b is connected by the adhesive 17 made of a silicone resin having good thermal conductivity, it is possible to effectively dissipate heat with less heat conduction loss. At the same time, the heat of the circuit board 13 whose temperature rises due to the heat of these heat-generating components is also transmitted to the storage recess 12c through the adhesive 17. Further, the heat generated in the insulating case 14 is transmitted to the housing recess 12c and also to the base member 16 to be radiated.

 At the same time, the temperature of each LED 11 rises and heat is generated. The heat is transmitted from the disc-shaped light emitting unit circuit board 11a to the support unit 12f to which the light emitting unit circuit board 11a is adhered and fixed, and is radiated from the main body 12 to the outside air through the radiation fins 12d. At this time, since the light emitting circuit board 11a and the main body 12 are made of aluminum having good thermal conductivity, the heat generated by the LED 11 can be effectively radiated with less heat conduction loss. Thereby, the temperature rise and temperature nonuniformity of each LED11 are prevented, the fall of luminous efficiency is suppressed, and the fall of the illumination intensity by the light beam fall can be prevented.

  At the same time, since the thermal fuse 15 is disposed close to the transistor 13b1 and the LED 11, the temperature of the transistor 13b1 and the LED 11 is always sensed and detected. Here, for example, if a short circuit accident (for example, BC short circuit) occurs in the transistor 13b1, which is a heat-generating component, over many years of use, a current that is not controlled by the transistor 13b1 continues to flow through each LED 11 and the transistor temperature increases. To rise. When the temperature of the transistor 13b1 rises, the temperature fuse 15 disposed on the back side of the transistor senses and detects the temperature rise, and the temperature exceeds a predetermined reference value, which is 128 ° C. in this embodiment. In such a case, the lighting circuit 19 is cut off and the operation of the lighting device B is stopped.

  Further, when an abnormality occurs on the LED side and the temperature of the LED 11 rises, in this embodiment, the gap dimension t2 between the upper end portion 15a of the thermal fuse 15 and the bottom surface 12c1 of the housing recess 12c is set to about 7 mm. The thermal fuse 15 is positioned so as to face and close to the housing recess 12c of the main body 12, and the thermal fuse 15 and the bottom surface 12c1 of the housing recess 12c are thermally connected by the heat conductive adhesive 17; It is comprised so that the temperature of LED11 which is a light emitting element can also be detected.

  Therefore, when the temperature of the LED 11 rises, the heat is lost from the support portion 12f of the main body 12 made of aluminum to the thermal fuse 15 via the heat conductive adhesive 17 through the bottom surface 12c1 of the housing recess 12c. Good transmission. When the transmitted temperature reaches a predetermined reference value, which is 128 ° C. or higher in this embodiment, the LED is in an abnormal state exceeding the normal lighting temperature (about 80 to 100 ° C.). Detecting, detecting and fusing, the operation of the lighting device B is stopped as described above.

  In this embodiment, the predetermined reference value 128 ° C. for the temperature at which the thermal fuse 15 is blown is set as follows. That is, as shown in Table 1 below, first, the temperature of the transistor, that is, the thermal fuse at the time of BC short-circuiting (when the base-collector is short-circuited) during normal lighting and when abnormal, the vicinity of the LED 11 and the resin component, etc. Experiments were carried out to see the temperature state of each part.

  As the lamp with the cap to be tested, the lamp with cap 10 of the above-described embodiment was used. The temperature measurement locations indicated by a to e in Table 1 correspond to the portions indicated by a to e in FIG. 1, the measurement location a is the solder surface (junction portion) of the LED 11, and the measurement location b is the body 12. The joint portion of the support portion 12f with the globe 18, the measurement location c is the substantially central portion of the bottom surface 12c1 of the storage recess 12c inside the main body 12, the measurement location d is the central portion of the outer surface of the thermal fuse 15, and the measurement location e is a transistor. 13b1 is a solder surface.

  Three types of test voltages of 90V, 100V, and 110V (two types of 90V and 100V in the case of BC short-circuit) are supplied to the lighting circuit 19, and the measurement points a to at the time of normal lighting and BC short-circuit at each voltage The temperature of e was measured. The results are shown in Table 1.

As apparent from Table 1, the surface temperature of the thermal fuse 15 and the transistor 13b1 when the BC of the transistor 13b1 is short-circuited is 128.0 ° C. Further, this temperature of 128 ° C. is higher than the temperature (97.6 to 114.0 ° C.) at the maximum voltage of 110 V in each part of a to e during normal lighting, particularly the temperature of the transistor 13b1 of 114.0 ° C. Can be reliably detected, and the temperature of the LED 11 when the BC is short-circuited is lower than 138.0 ° C., and can be thermally protected, and the melting temperature of the resin (about 130 ° C.) In the present embodiment, this temperature of 128 ° C. was set to a predetermined reference value.

  As a result, the short circuit of the transistor 13b1 which is a heat-generating component and the abnormality on the LED side can be reliably detected, and the lighting device B can be stopped at a temperature lower than the melting temperature of the resin such as the insulating case 14 and the globe 18. It was confirmed that deformation, discoloration, melting, etc. of parts were prevented.

  Incidentally, when the temperature rises above the predetermined reference value (128 ° C.), the temperature of the circuit board 13 and the electronic parts also rises, and the parts are damaged. There is a risk of melting and the like. Moreover, when the temperature of each LED11 rises, the fall of illumination intensity will arise by the fall of luminous efficiency. Moreover, there exists a possibility that the deformation | transformation and discoloration of the globe 18 which consists of resin may arise with the temperature rise of LED.

  As described above, according to this embodiment, when the transistor 13b1 and the LED 11 are abnormal, the lighting device B can be stopped by the temperature fuse 15 serving as the operation stop means, so that no component damage occurs and the melting temperature of the resin component Since the resin component is stopped at a lower temperature, deformation, discoloration, melting and the like of the resin parts do not occur, so that no abnormality is observed in appearance and safety can be improved.

  In particular, since the thermal fuse 15 is located close to the back surface of the transistor 13b1, the temperature rise of the transistor can be reliably detected, and the lighting device B can be reliably stopped. Further, the thermal fuse 15 has a gap t2 between the upper end portion 15a and the bottom surface 12c1 of the housing recess 12c set to about 7 mm, and the operation stopping means 15 is connected to the housing recess 12c of the main body 12, in other words, to the LED 11. Since they are arranged so as to face each other and close to each other, an abnormal state of both the heat-generating component and the LED can be detected by one common temperature fuse, and a lamp with a cap that is advantageous in terms of cost is provided. be able to. In addition, since the thermal fuse 15 is arranged close to the transistor 13b1 and close to the LED 11, the thermal fuse can be attached to a location where the temperature sensing of the transistor and the LED can respond sensitively, and the reaction speed can be increased. The lighting device can be reliably stopped when an abnormality occurs on the transistor and LED sides. Further, since the thermal fuse 15 and the bottom surface 12c1 of the housing recess 12c are thermally connected by the heat conductive adhesive 17, it is possible to transfer the heat on the LED side to the thermal fuse 15 without any heat conduction loss. It is possible to reliably stop the lighting device B even when an abnormality occurs on the LED side. At the same time, the circuit board 13 itself is also fixed to the insulating case 14 by the adhesive 17, and the insulating case 14 is firmly fixed to the main body 12.

  In the thermal fuse 15, the insulating case 14 is fitted into the housing recess 12c of the main body 12, and the circuit board 13 is fitted into the insulating case 14, so that the gap t2 between the upper end 15a and the bottom surface 12c1 of the housing recess 12c is automatically set. And can be disposed so as to be in close proximity to the housing recess 12c of the main body 12, that is, to face the LED 11. For this reason, an assembling operation can be facilitated, the manufacturing cost can be reduced, and a lamp with a cap that is advantageous in terms of cost can be provided. At the same time, it is not necessary to prepare special dedicated parts, the assembly work can be simplified, and a lamp with a cap suitable for mass production can be provided.

  Also, there is a means to detect abnormal states of electronic components and LEDs by devising the circuit configuration in the lighting circuit, but the number of electronic components increases by that amount, making it impossible to mount on the circuit board, and as a result The circuit board must be enlarged, and it becomes difficult to achieve downsizing of the entire lamp. On the other hand, in this embodiment, since the abnormal state of the electronic component or LED is detected by one thermal fuse 15, all the electronic components including the thermal fuse are mounted on a small circuit board, and the lamp Overall miniaturization can be achieved.

  Further, even during normal lighting, heat generated from heat-generating components such as transistors is transferred to the inner surface of the housing recess 12c through the adhesive 17 which is a heat conducting member, and the heat dissipating fin 12d from the thick main body 12 made of aluminum. The heat can be radiated to the outside through the air, the temperature of the components can be lowered, the cause of the circuit failure is eliminated, the reliability is improved, and the lamp with the cap and the lighting fixture in which the reduction of the life is suppressed can be provided. . At the same time, heat generated from each LED 11 is also transmitted from the disc-shaped light emitting unit circuit board 11a made of aluminum to the support unit 12f to which the light emitting unit circuit board is adhered and fixed, and from the main body 12 made of aluminum. Heat is dissipated to the outside air through the radiation fins 12d, temperature rise and temperature unevenness of each LED 11 can be prevented, light emission efficiency can be prevented from being reduced, and illuminance can be prevented from being reduced due to a decrease in luminous flux, while at the same time extending the life of the LED Can be achieved. Moreover, it can be reduced in weight by aluminum and does not become heavy as a light bulb.

  In addition, since the adhesive 17 is filled in the space portion s and connects the heat generating component, the thermal fuse, and the housing recess 12c, it can be reliably transmitted to the main body 12 side with reduced heat conduction loss. The amount of the adhesive 17 such as an expensive silicone resin can be reduced, which is advantageous in terms of cost. Further, the circuit board 13 itself is also fixed to the insulating case 14 by the adhesive 17, and the insulating case 14 is firmly fixed to the main body 12 to improve workability, which is further advantageous in terms of cost.

  As described above, in this embodiment, the thermal fuse 15 serving as the operation stop means is disposed on the back side of the transistor 13b1, but as shown in FIG. 4, it may be disposed in contact with the outer surface of the transistor. Good. In this case, the transistor 13b1 is mounted facing the wide side (right side in the figure) of the circuit board 13, and the thermal fuse 15 is directly overlapped and disposed so as to cover the outer surface of the transistor. At this time, the outer surface of the transistor and the thermal fuse 15 may be placed in contact with each other via an adhesive or sheet having good thermal conductivity such as silicone resin. According to this, temperature sensing of the transistor 13b1, which is a heat generating component, can be handled more sensitively, and the reaction speed can be further increased.

  The adhesive 17 made of silicone resin or the like, which is a heat conductive member, is filled between the heat generating component and the thermal fuse and the housing recess of the main body. The adhesive 17 may be filled throughout. Further, the inside of the base member 16 may be filled. According to this, the heat of the circuit board and each electronic component can be more reliably transmitted to the main body 12 and further transmitted to the base member made of metal, and can be radiated more effectively. Moreover, although the light emission part circuit board 11a which mounts LED was comprised with aluminum, even if comprised with nonmetallic materials, such as a glass epoxy material, a paper phenol material, and a glass composite, further, it comprised with ceramics. Also good.

  In the present embodiment, the operation stopping means is constituted by a thermal fuse, but it may be constituted by a temperature sensor and a controller as shown in the lighting circuit 19 of FIG. The temperature sensor 15 detects an abnormal state of the light emitting element or the electronic component when the detected temperature exceeds a predetermined reference value. This detection signal is transmitted to the control unit 19a of the lighting circuit 19. The control unit 19a includes a switching driver 1C for the transistor 13b1, and receives power from the resistor R3 by supplying power to the lighting circuit 19, and supplies a base current to the transistor 13b1 at a predetermined frequency to perform constant current control. When the detection signal is transmitted from the temperature sensor 15 to the control unit 19a, the control unit 19a stops supplying the base current to stop the switching of the transistor 13b1, stops the operation of the lighting device B, and forcibly disables the operation. Switch to point mode.

 As described above, the temperature sensor 15 constantly detects the temperatures of the transistor 13b1 and the LED 11, detects an abnormal state when the detected temperature exceeds a predetermined reference value, and transmits a detection signal to the control unit 19a. Thus, the operation of the lighting circuit 19 is stopped. The temperature sensor 15 having the above-described configuration is disposed in the vicinity of the transistor 13b1 that is an electronic component and in the vicinity of the LED 11 in the same manner as the above-described temperature fuse.

  Moreover, as shown in FIG. 6, the insertion hole 12g of the main body 12 for inserting the electric wire w connecting the output terminal of the lighting device B and the light emitting unit circuit board 11a has a large electrical connection part 11c side (surface side). A tapered through hole is formed so as to have a diameter of the circle, and a circular through hole 11b matching the large diameter circle is formed in the light emitting circuit board 11a, and the protective insertion tube is formed in the tapered insertion hole 12g. You may comprise by inserting P. FIG. The taper angle is preferably about 2 to 6 °.

  According to this configuration, when the electric wire w is pulled out to the front surface side of the light emitting unit circuit board 11a through the insertion hole 12g and the through hole 11b and bent toward the electric connection unit 11c, the electric wire w is bent. Since the inner portion hits the corner via the protective tube P without directly hitting the corner of the through hole 11b, it is possible to prevent the electric wire from being damaged or disconnected. Incidentally, the light emitting unit circuit board 11a is formed of a thin metal plate, and it is difficult to form a chamfer for protection in the through-hole. is there.

  The protective tube P has a cylindrical shape with both ends opened, and is made of a flexible synthetic resin such as transparent or translucent nylon or synthetic rubber. One end of the protective tube P is inserted through the through hole 11b. It is inserted into the hole 12g and fixed by frictional engagement with the tapered surface of the insertion hole 12. As a result, the protective tube P can be shortened, and no means are required for fixing, thereby simplifying the configuration. In addition, it fixes so that the front-end | tip of the protection tube P may protrude a little from the through-hole 11c. As a result, the bent inner portion of the electric wire w can be reliably protected without hitting the corner of the through hole 11b.

  4 to 6 showing the modified examples described above, the same reference numerals are given to the same portions as those in FIGS. 1 to 3, and a detailed description thereof is omitted. Although the preferred embodiments of the present invention have been described above, the present invention is not limited to the above-described embodiments, and various design changes can be made without departing from the scope of the present invention.

DESCRIPTION OF SYMBOLS 10 Lamp with base 11 Light emitting element 12 Main body 12f Support part 12c Housing recessed part 13 Circuit board 13a, 13b, 13b1 Electronic component 14 Insulation case 15 Operation stop means 16 Base member 17 Heat conduction member 18 Translucent cover member 19 Lighting circuit 20 Illumination Appliance 21 Appliance body 23 Socket A Light source B B Lighting device

Claims (4)

A light emitting element;
A thermally conductive main body having a support portion for disposing the light emitting element at one end and a storage recess at the other end;
A lighting device having a circuit board on which electronic components constituting a lighting circuit of the light emitting element are mounted and disposed in a housing recess;
An operation stop means mounted on a position close to the light emitting element of the circuit board to detect the temperature of a predetermined electronic component and to deactivate the lighting device when the temperature exceeds a predetermined reference value;
A base member provided at the other end of the main body and connected to the lighting device;
A lamp with a base, characterized by comprising: 2. The lamp with cap according to claim 1, wherein the operation stopping means is disposed in contact with an electronic component. The lamp with cap according to claim 1 or 2, wherein the electronic component is thermally connected to the surface of the housing recess of the main body via a heat conducting member. An instrument body provided with a socket;
A lamp with a cap according to any one of claims 1 to 3, which is mounted on a socket of the instrument body;
The lighting fixture characterized by comprising.