CN104832803B - Inflatable LED bulb - Google Patents

Abstract

The invention relates to an LED bulb. The utility model provides an inflatable LED bulb, which comprises a bulb shell, the stem, LED, lamp holder and LED driver, the gas storage chamber is enclosed into to bulb shell and stem, the stem is equipped with the passageway of aerifing with the gas storage chamber intercommunication, be equipped with the end cap of opening a position jack, the sealed first spring of living the passageway of aerifing of drive end cap, the bolt of pegging graft in opening a position jack, float the room and rely on the pressure effect of the gas in the gas storage chamber and remove and drive the bolt and follow the floating plug of extracting in opening a position jack, the sealed sliding connection of floating plug is in floating the room, the floating plug will float the room and cut apart into sealed chamber and with the opening chamber of gas storage chamber intercommunication, the opening chamber is located. The LED bulb has the advantages of less heat transferred to the core column by the LED, uniform heat dissipation and automatic disconnection when the internal air pressure reaches a set value, and solves the problems that the existing LED bulb is poor in heat dissipation uniformity and the stability of an LED driver is greatly influenced by the dissipated heat.

Description

Inflatable LED Bulb

technical field

The invention relates to LED light bulbs, in particular to an inflatable LED light bulb and a manufacturing method thereof, belonging to the lighting field.

Background technique

Due to the advantages of small size, low power consumption, long service life, high brightness, environmental protection and durability, LEDs are widely used in lamps.

The structural form of the LED bulb is that a heat transfer body (stem) with one end located in the bulb shell is installed on the lamp cap, and an LED is installed on the inner end of the stem.

In the Chinese patent application publication number CN101893180A, a patent document titled "A LED Light Bulb" discloses an LED light bulb. The light bulb in this patent includes a lamp cap, a lamp holder, a lampshade, a radiator, and The driver is provided with an independent small light-emitting area on the bulb. The small light-emitting area is composed of an independent heat sink arranged at the end of the radiator away from the lamp cap, an LED light source assembly and a reflector installed on the independent heat sink. The lampshade is connected to the radiator. and cover all the individual small light-emitting areas together. The independent small light-emitting area in this patent is placed on the top of the bulb and arranged around the periphery, so that the light can irradiate all around, and the radiator is located between the light-emitting area and the lamp cap.

A kind of LED light bulb is also disclosed in the patent literature with the Chinese Patent Authorization Announcement No. CN201636612U titled "New Efficient Heat Dissipation LED Light Bulb". There is a stem whose outer end is connected with the lamp holder. The stem is prism-shaped, and LEDs are installed on each surface of the stem located in the bulb shell. In order to increase the heat dissipation effect, a ceramic block is arranged between the bulb shell and the lamp cap to assist the lamp cap in heat dissipation.

The existing LED light bulbs are all similar to the structures disclosed in the above two patent documents, and have the following disadvantages: the lighting area is the upper front area of the lamp head, and the lamp head of the light bulb is installed upright and requires the light to shine downward. When used in a lamp (such as a floor lamp), it is very dark in a large area around the lamp, that is, the lighting angle is small; heat dissipation is carried out through the lamp cap and stem, and in actual use, the lamp cap is connected to the lamp and located on the The inside of the connecting part of the lamp, that is, the lamp cap is in a fully closed or semi-closed state, the effective area of the heat dissipation part in contact with the air is small, and the air around the heat dissipation part has poor fluidity, resulting in poor heat dissipation capacity of the bulb and long service life. Short, the heat generated by the LED is completely dissipated by the stem, and the heat will affect the stability of the LED driver installed in the lamp holder; the uniformity of heat dissipation is poor; the compactness of the structure is poor.

Contents of the invention

The first object of the present invention is to provide an inflatable LED light bulb and a manufacturing method that transmit less heat to the stem from the LED, uniform heat dissipation, and can be automatically disconnected when the internal air pressure reaches a set value, which solves the problem of existing LED bulbs. The heat dissipation uniformity of the bulb is poor, and the heat emitted has a great impact on the stability of the LED driver.

The second purpose of the invention is to further provide an inflatable LED bulb with a large lighting angle, which solves the problem of the small lighting angle of the existing LED bulbs

The above technical problems are solved by the following technical solutions: an inflatable LED light bulb, comprising a bulb, a stem, an LED, a lamp holder and an LED driver for driving the LED, the bulb and the stem surround an air storage chamber, The LED is suspended in the air storage chamber through the stem, and the stem is provided with an inflation channel communicating with the air storage chamber, a plug with an opening hole, and a driving plug to seal the housing. The first spring of the inflatable channel, the plug inserted into the opening position socket, the floating chamber and the floating plug that moves and drives the plug to be pulled out from the opening position socket by relying on the pressure of the gas in the gas storage chamber , the floating plug is sealed and slidingly connected in the floating chamber, and the floating plug divides the floating chamber into a sealed cavity and an open cavity communicating with the air storage cavity, and the open cavity is located where the floating plug faces the side of the latch. When in use, the heat generated by the LED is mainly dissipated through the cooling gas in the bulb, so the ratio of the heat transferred to the stem and dissipated through the stem is relatively low, thereby reducing the influence of the heat generated by the LED on the LED driver. The heat is dissipated through the gas without a radiator, so that the lamp holder and the bulb can be directly connected together (that is, overlapped together), which lays the foundation for the realization of a compact structure; the gas has good heat dissipation uniformity. When the air pressure of the gas in the bulb reaches the set value during the production process, the plug can automatically close the air charging channel, which is convenient for inflating, and the accuracy of the internal air pressure value is high. The plug can rely on the dead weight of the plug and the floating plug or other forces to be inserted into the open socket.

Preferably, the moving direction of the plug intersects with the extending direction of the inflation channel. The air pressure during inflation has little interference with the closing of the plug, and the plug can cut off the inflation channel more timely and quickly, and the accuracy of the air pressure in the air storage cavity is high when the cut off is timely. Accurate air pressure can make the heat dissipation effect of the bulb more in line with the design requirements.

Preferably, the inflation channel is provided with an annular slot extending along the circumference of the inflation channel into which the plug is inserted, and the slot is sealingly connected with the plug through a side wall. It can more effectively prevent the plug from disengaging and has good reliability.

As a preference, an elastic rubber storage tank is provided inside the card slot, and an annular sealing groove extending along the circumference of the inflation channel is provided on the side wall of the card slot, and the rubber storage tank is provided with the same seal as the sealing groove. Groove connected glue nozzle. When the plug is closed, the plug will squeeze the glue storage tank to make the glue flow into the sealing groove. After the glue in the sealing groove is cured, the plug and the stem are sealed and fixed together. The plug can more reliably block the inflation channel. Prevent air leakage when the state of the light bulb changes or when it receives vibration, which will affect the heat dissipation effect of the light bulb.

Preferably, the sealing groove is located on the outer side wall of the card slot, and the inner side wall of the card slot is provided with a sealing ring. The gas generated when the sealant is cured can be prevented from flowing into the air-filled cavity. If the gas generated during solidification enters the gas storage chamber, the purity of the heat dissipation gas will be affected, and the decrease in the purity of the heat dissipation gas will lead to a decrease in the heat dissipation effect. Therefore, this technical solution can make the heat dissipation stability of the bulb good.

Preferably, when the inflation channel is in an open state, the glue storage tank and the plug are distributed at both ends of the card slot along the moving direction of the plug. It can ensure that the glue does not overflow into the air storage chamber and affect the purity of the cooling gas in the air storage chamber.

Preferably, the float chamber is provided with a second spring that drives the latch to be inserted into the opening position insertion hole. The convenience at the time of production can be improved. If it is inserted by its own weight, the latch and floating plug must be located above the open position jack during production.

The present invention also includes a substrate, the substrate is connected to the inner end of the stem column through a connecting frame, the substrate is disconnected from the stem column, the LED is installed on the substrate, and the surface of the bulb is provided with There is a light diffusion layer, the gas storage cavity is filled with heat dissipation gas, the air pressure in the gas storage cavity is greater than 1 standard atmospheric pressure, and the angle between the centerline of the stem and the centerline of the substrate is less than 15°. The substrate is connected with the stem through the connecting frame, which can avoid the amount of heat transfer from the LED to the stem, and at the same time, the stem does not affect the heat dissipation of the LED. A light diffusion layer is arranged on the surface of the bulb shell, which can improve the lighting angle of the bulb and make the light output soft. The beneficial effect that the included angle between the center line of the stem and the center line of the base plate is less than 15° is: it is convenient to assemble the stem and the bulb together and can make the brightness uniformity of the bulb circumferential direction good.

Preferably, the opening direction line of the inner end of the inflation channel passes through the base plate, and the base plate is provided with a pressure relief hole aligned with the inner end of the inflation channel. It can not only ensure that the center of gravity and the geometric center of the bulb are basically coincident, so as to prevent the twisting force along the lamp cap axis generated when the bulb is connected to the lamp holder, which will cause partial wear of the connecting thread, but also avoid the direct impact of the airflow when the bulb is inflated. Electrical failures and loosening of mechanical connections to the substrate.

A method for making an inflatable LED light bulb, comprising the following steps:

The first step is to connect the LED to the inner end of the stem;

In the second step, the inner end of the stem is inserted into the bulb so that the LED is suspended in the bulb, and the outer end of the stem is sealed and connected with the bulb, and the bulb and the stem enclose an air storage chamber; Before the second step, the plug is inserted into the jack at the opening position so that the plug is located at the opening position, that is, the gas storage chamber communicates with the outer space of the bulb through the inflation channel;

The third step is to evacuate the air storage cavity through the inflatable channel;

The fourth step is to inject heat dissipation gas into the air storage chamber through the air-filling channel. When the pressure in the air storage chamber rises to the set value, the thrust generated by the gas in the air storage chamber on the floating plug will cause the plug to open from the open position. Pull out the middle, the first spring drives the plug to move towards the inflatable channel so that the plug will block the inflatable channel, and the result of the partition is to form a closed cavity for the air storage chamber;

The fifth step is to assemble the LED driver;

The sixth step is to assemble the lamp holder.

The invention has the following advantages: the influence of the heat generated by the LED on the LED driver can be reduced through the heat dissipation of the heat dissipation gas, the heat dissipation uniformity is good, and the air pressure in the air storage chamber can be conveniently set at a set value during the manufacturing process.

Description of drawings

Figure 1 is a schematic diagram of the present invention.

Fig. 2 is a schematic diagram when the stem is connected to an LED.

FIG. 3 is a partially enlarged schematic diagram of B in FIG. 2 .

Fig. 4 is a schematic diagram when the stem is connected to the bulb.

Fig. 5 is a schematic diagram when the air pressure in the air storage cavity reaches a set value.

FIG. 6 is a partially enlarged schematic diagram at point C in FIG. 5 .

Fig. 7 is a schematic diagram when an LED driver is assembled.

In the figure: stem 1, LED driver installation pit 11, wire 12, air-inflating channel 13, outer end 131 of air-inflating channel, inner end 132 of air-inflating channel, card slot 133, sealing ring 134, sealing groove 135, outer flange 14 , plug 15, first spring 151, opening position jack 152, glue storage tank 16, glue nozzle 161, floating chamber 17, sealing cavity 171, opening cavity 172, latch 18, floating plug 181, second spring 182, Substrate 2 , connecting frame 21 , pressure relief hole 22 , LED 23 , bulb 3 , light diffusion layer 31 , sealed cavity 4 , LED driver 5 , lamp holder 6 .

detailed description

The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

Referring to FIG. 1 , an inflatable LED light bulb includes a stem 1 , a substrate 2 , a bulb 3 , an LED driver 5 and a lamp cap 6 .

The stem 1 is made of heat-conducting material. The outer end of the stem 1 is provided with an LED driver installation cavity 11 . Lead wires 12 and air-filling channels 13 are arranged in the LED driver installation cavity 11 . The outer end 131 of the air-filled channel protrudes from the bottom wall of the LED driver installation cavity 11 . The outer end of the stem 1 is provided with an annular outer flange 14 . A plug 15 is provided in the inflation channel 13 . The inflation channel 13 is closed by a plug 15 .

The substrate 2 is made of heat conducting material. The substrate 2 is circular. The included angle between the centerline of the stem 1 and the centerline of the base plate 2 is 0°, that is, parallel, which is coincidence in this embodiment, but of course, as long as it is less than 15°, the requirement can be met. The substrate 2 is disconnected from the stem 1 . One side of the substrate 2 is connected with the inner end of the stem 1 through a connecting frame 21 . In this embodiment, the connecting frame 21 is composed of two rod bodies. The outlet direction line of the inner end 132 of the inflation channel passes through the substrate 2 , and the outlet direction line of the inner end 132 of the inflation channel in this embodiment is the centerline of the stem 1 . The base plate 2 is provided with a pressure relief hole 22 aligned with the inner end 132 of the inflation channel. All the projections of the inner end of the stem 1 along the central line direction, that is, the direction A in the figure, are located on the base plate 2 . The projected area of the inner end of the stem 1 along the direction of the centerline is smaller than the area of the substrate 1 . LED23 is mounted on the side of the substrate 2 away from the stem. LED23 is electrically connected with wire 12.

The outer surface of the bulb 3 is provided with a light diffusing layer 31 . The bulb shell 3 and the outer flange 14 are hermetically connected together to form the air storage cavity 4 . The inner end of the stem 1 is located in the air storage chamber 4 so that the LED 23 is suspended in the air storage chamber 4 . The gas storage chamber 4 is filled with heat dissipation gas with a molecular weight of 28 or less. The air pressure in the air storage chamber 4 is 2 standard atmospheres. As long as the air pressure in the air storage chamber 4 is 1.6 to 2.5 atmospheres, the heat dissipation effect is the best, and the heat dissipation effect will be reduced if the pressure is too large or too small.

The LED driver 5 is located in the LED driver installation cavity 11 . The output terminal of the LED driver 5 is connected with the wire 12 to realize the electrical connection with the LED. The input terminal of the LED driver 5 is connected with the lamp holder 6 together.

Lamp cap 6 is a screw cap. The lamp holder 6 is sleeved on the opening ends of the LED driver 5 and the bulb 3 at the same time. The bulb shell 3 overlaps with the lamp cap 6 and is fixed together.

The concrete method of making the present invention is:

Referring to FIG. 2 , the first step is to manufacture the stem 1 , package the LED 23 on the substrate 2 , and connect the substrate 2 to the inner end of the stem 1 through the connecting frame 21 .

Referring to FIG. 3 , the inflation channel 13 is provided with a card slot 133 . The locking groove 133 is an annular groove extending along the circumference of the inflation channel 13 . An elastic rubber storage tank 16 is disposed in one radial end of the slot 133 . The glue storage tank 16 is provided with a glue outlet 161 . The plug 15 is located at the other radial end of the slot 133 . The plug 15 moves along the left and right directions in the figure. The extending direction of the inflation channel 13 is the up-down direction in the figure. A sealing ring 134 is disposed on the inner sidewall of the slot 133 . The sealing ring 134 extends along the circumference of the inflation channel 13 . A sealing groove 135 is formed on the outer wall of the locking groove 133 . The sealing groove 135 is an annular structure extending along the circumference of the inflation channel 13 . The sealing groove 135 communicates with the glue nozzle 161 .

A floating chamber 17 , a first spring 151 , a latch 18 , a floating plug 181 and a second spring 182 are also provided in the stem 1 . The plug 15 is provided with an open position jack 152 . One end of the latch 18 is inserted in the opening position jack 152 , and the other end is connected with the floating plug 181 . When the latch 18 is inserted in the open position jack 152, the plug 15 is staggered with the inflation passage 13, that is, the inflation passage 13 is opened. The floating plug 181 is sealingly and slidingly connected in the floating chamber 17 . The floating plug 181 divides the floating chamber 17 into a sealed cavity 171 and an open cavity 172 . The opening 172 is in communication with the air storage cavity 4 (see FIG. 1 ). The opening 172 is located on a side of the floating plug 181 facing the pin 18 . The second spring 182 is located in the sealing cavity 171 , and the latch 18 is inserted into the opening position insertion hole 152 driven by the second spring 182 .

Referring to Fig. 4, the second step is to thread the inner end of the core 1 into the bulb shell 3 so that the LED 23 is suspended in the bulb shell 3, and the outer flange 14 is sealed and connected with the bulb shell 3, and the bulb shell 3 and the stem 1 surrounds the gas storage chamber 4.

The third step is to evacuate the gas storage chamber 4 to a set vacuum degree through the gas charging channel 13;

Referring to FIG. 5 , the fourth step is to inject heat dissipation gas into the gas storage cavity 4 through the gas charging channel 13 . When the pressure in the air storage chamber 4 rises above the set value (2 atmospheres in this embodiment)

Referring to Fig. 6, the gas in the gas storage cavity enters the opening 172 and the thrust generated by the floating plug 181 overcomes the elastic force of the second spring 182 so that the latch 18 is pulled out from the opening position socket 152, and the first spring 151 drives the plug 15 toward The inflatable channel 13 is moved and inserted into the slot 133, the plug 15 is sealed and connected with the inner side wall of the slot 133 through the sealing ring 134, and the plug 15 also squeezes the rubber storage tank 16 so that the sealant in the storage tank passes through The glue nozzle 161 flows out into the sealing groove 135. After the sealant in the sealing groove 135 is cured, the plug 15 is sealed and fixed together with the outer wall of the card groove 133, so that the plug 15 cuts off the inflatable channel 13, and the blocked As a result, a closed cavity is formed for the gas storage chamber 4 .

Referring to Fig. 5, the excess portion at the outer end of the air-filling channel 13 is removed.

Referring to FIG. 7 , the fifth step is to install the LED driver 5 into the LED driver installation cavity 11 . The output terminal of the LED driver 5 is connected with the wire 12 to realize the electrical connection with the LED 23 . A light-diffusing glue is coated on the outer surface of the bulb 3 to form a light-diffusing layer 31 .

Referring to FIG. 1 , the sixth step is to sleeve the lamp cap 6 on the open end of the LED driver 5 and the bulb 3 at the same time. The bulb shell 3 is overlapped with the lamp cap 6 and bonded together through the light diffusion layer 31 . The input terminal of the LED driver 5 is connected with the lamp holder 6 together.

Claims (5)

1. An inflatable LED light bulb, comprising a bulb, a stem, an LED, a lamp cap and an LED driver for driving the LED, is characterized in that it also includes a substrate, and the bulb and the stem surround an air storage chamber, so The LED is suspended in the air storage chamber through the stem, and the stem is provided with an inflation channel connected with the air storage chamber, a plug with an opening hole, and a driving plug to seal the The first spring of the inflatable channel, the pin plugged into the opening position jack, the floating chamber and the floating plug that moves and drives the pin to be pulled out from the opening position jack by relying on the pressure of the gas in the gas storage chamber, The floating plug is sealed and slidably connected in the floating chamber, and the floating plug divides the floating chamber into a sealed cavity and an open cavity communicating with the air storage cavity, and the open cavity is located where the floating plug faces the On the plug side, the substrate is connected to the inner end of the stem through a connecting frame, the substrate is disconnected from the stem, the LED is installed on the substrate, and the surface of the bulb is provided with a light Diffusion layer, the gas storage cavity is filled with heat dissipation gas, the air pressure in the gas storage cavity is greater than 1 standard atmospheric pressure, the angle between the center line of the stem and the center line of the substrate is less than 15°, the connection The frame is composed of two rods, the moving direction of the plug intersects with the extension direction of the inflatable channel, and the inflatable channel is provided with an annular slot extending along the circumference of the inflatable channel for the plug to be inserted into. The card slot is sealed and connected with the plug through the side wall, an elastic rubber storage tank is arranged in the card slot, and an annular sealing groove extending along the circumference of the inflation channel is provided on the side wall of the card slot, so The glue storage tank is provided with a glue outlet connected to the sealing groove, and the stem is made of heat-conducting material. 2 . The inflatable LED light bulb according to claim 1 , wherein the sealing groove is located on the outer wall of the locking groove, and the inner wall of the locking groove is provided with a sealing ring. 3. The inflatable LED light bulb according to claim 1 or 2, characterized in that, when the inflatable channel is in an open state, the glue storage tank and the plug are distributed at both ends of the card slot along the moving direction of the plug. 4. The inflatable LED light bulb according to claim 1 or 2, characterized in that, the floating chamber is provided with a second spring that drives the latch to be inserted into the opening position socket. 5. The inflatable LED light bulb according to claim 1 or 2, wherein the opening direction line of the inner end of the inflatable channel passes through the base plate, and the base plate is provided with a pressure relief valve aligned with the inner end of the inflatable channel. hole.