TWI754022B - LED lamp electrode connection structure - Google Patents

Abstract

A LED lamp tube electrode connection structure is composed of a plurality of LEDs that are electrically connected to each other and arranged on a long strip main circuit board to form a light bar, and two ends of the main circuit board are respectively corresponding to the two phases of the LEDs that are electrically connected. One of the different electrodes is provided with a single electrode end, and another light-transmitting lamp tube is sleeved on the outer peripheral side of the light bar, and two ends of the lamp tube are sleeved and fixed respectively with a conductive the electrode cap, and respectively use an elastic conductive element with an electrical contact plane at one end to elastically contact the inside of the electrode cap and/or between the individual electrode ends, so that the electrode cap and the individual electrode end can be These elastic conductive elements can achieve the combination characteristics of single-surface contact, avoid the combination direction being restricted by the corresponding plurality of electrodes, simplify the processing, and also have the elastic conductive connection that the electrical contact relationship is not easy to dislocate/loose, so that the Conducive to the reduction of processing costs and the improvement of yield.

Description

LED lamp electrode connection structure

The present invention relates to an electrode connection structure of an LED lamp tube, in particular to a lamp tube structure which is easy to assemble, and can ensure that the electrode cap and the lamp tube sleeved on the two ends of the lamp tube can be electrically connected with the main circuit board inside.

As the related application technologies of LEDs gradually mature, various lamp products using LEDs as light sources are also popularized in the market; in the patent publication No. M503516 of the Republic of China "LED light bar structure with lens cover", it is disclosed that A disclosed lamp tube product structure that can be applied in traditional fields mainly includes: a flip-chip circuit board, a plurality of LED chips and a lens cover; a plurality of metal conductors are arranged on one surface of the flip-chip circuit board, and each LED chip is provided with a plurality of metal conductors. It is electrically connected to any two adjacent metal conductors. The lens cover is arranged on the flip-chip circuit board and shields the LED chips. A plurality of continuously connected convex structures are distributed on the inner surface of the lens cover. The outer peripheral side of the crystal circuit board is covered with a transparent tubular lampshade, and one end cap is respectively combined with the two ends of the lampshade. The two end caps are used to directly connect the external power supply, or the conductive contacts are arranged on each end cap. The conductive contacts are connected to the external power supply, which can provide the electric energy required for each LED chip to emit light.

However, in the above structure, the connection between the end cover (or the conductive contact) and the flip chip circuit board is more common by soldering two wires between the end cover (or the conductive contact) and the flip chip Between circuit boards; in this processing method, because the flip-chip circuit board extends into the tubular lampshade, and the two end caps cover the two ends of the tubular lampshade, now, due to the processing technology of LED strips With continuous improvement, the tube diameter of the lampshade has been miniaturized to less than 2mm, which makes it very time-consuming and labor-intensive to connect the wires between the two ends of the circuit board within the small tube diameter and the end cap, which is not conducive to production efficiency. promote.

In addition, the length of the lampshade is designed to be shortened, so that the two ends of the flip-chip circuit board can protrude from the edge of the lampshade, and two or more protruding parts of the flip-chip circuit board protruding from the edge of the lampshade are respectively provided. When the two-end cap covers the two ends of the lampshade, and can simultaneously contact the plurality of conductive parts of the flip-chip circuit board at the two ends of the circuit board to form a conduction; but in the process of implementation, due to the various components (covered The deviation of the machining accuracy of the chip circuit board, lampshade, end cap) and the difficulty of assembly may cause the multiple electrodes of the two end caps to fail to correspond accurately and stably with the conductive parts of the flip chip circuit board. The contact is conducted, and even after the correct assembly is completed, the lamp product is extremely susceptible to external force during use, which causes displacement between the plurality of electrodes of the two end caps and the plurality of conductive parts of the flip-chip circuit board. , resulting in poor local correspondence or loosening and loss of function, resulting in serious defects in application.

Prior to this, there are still elastic elements (such as ROC Patent Publication No. M490543) between the electrodes at both ends of the LED substrate and the end caps to reduce the problem of loosening between the electrodes. At times, it is difficult to correspond, and the corresponding relationship between electrodes is easily displaced due to external force or vibration during use, resulting in poor contact and other problems, which need to be further overcome.

In view of the above-mentioned shortcomings of the conventional LED lamp tube structure in application, the inventors have studied and improved the way of these shortcomings, and finally the present invention has been produced.

The main purpose of the present invention is to provide an electrode connection structure for an LED lamp tube, wherein a plurality of LEDs are arranged on an elongated main circuit board, and the LEDs are connected through a plurality of electrical conductors, and are connected at both ends of the main circuit board. A single electric conductor is used to form a separate electrode end corresponding to one of the two electrodes of the LED, and a light-transmitting lamp tube is sleeved on the outer peripheral side of the light bar, and the two ends of the lamp tube are sleeved. A conductive electrode cap is fixed together, and a conductive elastic sheet is used for elastic surface contact between the inside of the electrode cap and at least one of the two separate electrode ends, so that the overall assembly is extremely simple, and the electrode can be Between the cap and the single electrode end, the elastic surface pressure contact connection is maintained, and it is no longer limited by the combination direction and multi-polar correspondence during assembly, and even if it is offset by external force or vibration, it will not be loose. Or the polarity correspondence is not good, which can effectively improve the yield rate of electrical conductivity after assembly, and reduce the probability of poor contact during use.

Another object of the present invention is to provide an electrode connection structure for an LED lamp, which can effectively adapt to the tolerance of processing among the components by utilizing the elastic and conductive element's telescopic characteristics, reduce the precision requirement of each product component, and further greatly Save the production cost of the overall product to enhance the market competitiveness of the product.

In order to achieve the above objects and effects, the technical means adopted by the present invention include: a light bar, which is composed of a long strip-shaped main circuit board and a plurality of LEDs that are electrically connected to each other, and is located at two ends of the main circuit board. , which are respectively provided with single-pole individual electrode terminals electrically connected with the different electrodes of the LEDs; a light-transmitting lamp tube is sleeved on the outer peripheral side of the light bar, and sleeved at the two ends of the lamp tube respectively A conductive electrode cap is fixed together; at least one elastic conductive element is elastically pressed to contact between the inside of the at least one electrode cap and the individual electrode end of at least one of the ends.

According to the above structure, wherein the elastic conductive element has a specific elastic direction under force and extension, one end in the elastic direction under force and extension is in contact with an inner end surface of the electrode cap, and the other end in the elastic direction under force is in contact with The single electrode end at one end, and at least one end of the elastic conductive element, forms surface contact with the inner end face of the electrode cap or the single electrode end of the main circuit board, so as to reduce the poor contact caused by offset between each other or the possibility of disengagement.

According to the above structure, the elastic conductive element is connected between the two electrical contact ends and is in the form of a sheet body that is repeatedly bent, and at least one of the two electrical contact ends forms a contact surface facing the electrical contact direction.

According to the above structure, the elastic conductive element is connected between the two electrical contact ends and is a spring-like conductor bent in a spiral shape, and at least one of the two electrical contact ends forms a contact surface facing the electrical contact direction.

According to the above structure, the inner peripheral surface of the lamp tube is coated with at least one layer of fluorescent agent.

According to the above structure, the inner peripheral surface of the lamp tube is coated with multiple layers of fluorescent agents with different colors.

In order to obtain a more specific understanding of the above-mentioned objects, effects and features of the present invention, the following descriptions are given in accordance with the following drawings:

Referring to Figures 1 to 3, it can be seen that the structure of the first embodiment of the present invention includes: a light bar 1, a light tube 2, an elastic conductive element 3 and other parts, wherein the light bar 1 is composed of a long strip-shaped main circuit A board 11 and a plurality of LEDs 12 are formed, at least one surface side of the main circuit board 11 is provided with a plurality of electrical conductors 121 to electrically connect the LEDs 12, and two ends of the main circuit board 11 are respectively provided with a single and the One of the two different electrodes of the LED 12 is a single-pole individual electrode terminal 13 , 14 corresponding to each other and electrically connected, and the two separate electrode terminals 13 , 14 can further form electrical contact surfaces 131 , 141 toward the elastic conductive element 3 .

The lamp tube 2 is a light-transmitting tubular body with at least one end open, which is sleeved on the outer peripheral side of the light bar 1 , and a conductive electrode cap is sleeved and fixed at at least one end of the lamp tube 2 21, 22, the inner ends of the two electrode caps 21, 22 are formed with inner end faces 211, 221.

At least one elastic conductive element 3 has two electrical contact ends 31, 32, and is disposed between the corresponding at least one electrode cap 21 (22) and a single electrode end 13 (14); the elastic conductive element 3 has a The force between its two ends produces elastic expansion and contraction. One of the electrical contact ends 31 that is elastically stretched under the force is in contact with the inner end surfaces 211 and 221 of one of the electrode caps 21 and 22. The other electrical contact end 32 in the direction of elastic expansion and contraction is in contact with one of the two individual electrode ends 13 and 14, so that the inside of the at least one of the electrode caps 21 and 22 and the individual electrode ends 13 and 14 can be connected to each other. A contact state of elastic pressing is formed between the elastic conductive element 3 respectively, so that the electrode caps 21 and 22 and the two individual electrode ends 13 and 14 can be indirectly maintained through the elastic conductive element 3 and not easily loosened. The elastic contact is connected to the conductive state for stable connection to the external power supply.

In addition, in the present embodiment, the elastic conductive element 3 can be a sheet-like body that is repeatedly bent between the two electrical contact ends 31 and 32, and at least one of the two electrical contact ends 31 and 32, The system is formed to form surface contact with the individual electrode ends 13, 14 or the inner end faces 211, 221 of the electrode cap in the form of contact surfaces; in this way, during assembly, the light bar 1 can be extended into the Inside the lamp tube 2, the elastic conductive element 3 is placed in an electrode cap 21 (22) and between the individual electrode ends 13 (14), and the electrode caps 21 and 22 are sleeved on the two ends of the lamp tube 2, In this way, one electrical contact end 31 of the elastic conductive element 3 can directly contact the inner end faces 211 and 221 of the corresponding electrode caps 21 (22), and the other electrical contact end 32 can directly contact a single electrode end 13 (14), and form a state of being elastically compressed; thereby, the main circuit board 11, the lamp tube 2 or the small manufacturing tolerances of the electrode caps 21 ( 22 ) themselves can be effectively accommodated, so that the main circuit board 11 and the electrode caps 21 Between , 22, it can maintain stable and good electrical conduction effect in normal state of anti-loosening.

Please refer to Fig. 4 and Fig. 5, when the two ends of the main circuit board 11 of the present invention only have single electrode terminals 13, 14 of a single pole, the combination with the electrode caps 21, 22 is changed. It is extremely easy and does not need to carefully correspond to the polarity, and especially the electrical contact between the individual electrode ends 13, 14, the electrode caps 21, 22 and the elastic conductive element 3 is achieved in the form of a contact surface. Further, under the action of external force, the contact positions of each other produce lateral displacement (offset) or mutual rotation (as shown in the imaginary line in the figure), they can still maintain good electrical contact.

In a feasible embodiment, the inner peripheral surface of the lamp tube 2 can be coated with a layer of fluorescent agent (or multiple layers of fluorescent agents with different colors) as required, so as to form a more uniform light from the LED that originally generated direct light. Diffusion to achieve anti-glare effect.

Referring to FIG. 6, it can be seen that the structure of the second embodiment of the present invention includes: at least one elastic conductive element 4, and the same parts as the light bar 1 and the light tube 2 as in the first embodiment, wherein the light bar 1 and the lamp tube 2 are combined in the same way, and the elastic conductive element 4 is a spring-like conductor that is helically bent between its two electrical contact ends 41 and 42. The two elastic conductive elements 4 (Conductive spring) one of the electrical contact ends 41 directly contacts the inner end faces 211 and 221 of the electrode caps 21 and 22, and the other electrical contact end 42 directly contacts the two separate electrode ends 13 and 14 and forms an elastically compressed state; Therefore, when the electrical contact between them also adopts the above contact surface form, the same stable electrical connection effect as the aforementioned first embodiment can still be achieved.

Based on the above, the LED lamp electrode connection structure of the present invention can achieve low cost, easy assembly, and can ensure that the electrode cap sleeved on at least one end of the lamp tube is in close contact with the main circuit board inside the lamp tube. For a novel and progressive invention, it is required to apply for an invention patent in accordance with the law; however, the content of the above description is only a description of the preferred embodiment of the present invention, including any changes and modifications extended by the technical means and scope of the present invention. , changes or equivalent replacements shall also fall within the scope of the patent application of the present invention.

1‧‧‧Light bar

11‧‧‧Main circuit board

12‧‧‧LED

121‧‧‧Plural electrical conductors

13, 14‧‧‧Separate electrode terminal

131, 141‧‧‧Electrical contact surface

2‧‧‧Lights

21, 22‧‧‧Electrode cap

211, 221‧‧‧Inner end face

3. 4‧‧‧Elastic conductive element

31, 32, 41, 42‧‧‧ electrical contacts

FIG. 1 is an exploded structural view of the first embodiment of the present invention.

FIG. 2 is a schematic diagram of the overall combined structure of the first embodiment of the present invention.

FIG. 3 is an overall combined cross-sectional view of the first embodiment of the present invention.

Figure 4 is a schematic diagram of the combination relationship between the electric shock cap and the elastic conductive element of the present invention.

Fig. 5 is a schematic diagram of the combined relationship between the individual electrode ends and the elastic conductive element of the present invention.

FIG. 6 is an overall combined cross-sectional view of the second embodiment of the present invention.

1‧‧‧Light bar

11‧‧‧Main circuit board

12‧‧‧LED

121‧‧‧Plural electrical conductors

13, 14‧‧‧Separate electrode terminal

131, 141‧‧‧Electrical contact surface

2‧‧‧Lights

21, 22‧‧‧Electrode cap

211, 221‧‧‧Inner end face

3‧‧‧Elastic conductive element

31, 32‧‧‧Electrical contact terminal

Claims (10)

An electrode connection structure for an LED lamp tube, at least comprising: a light bar, which is composed of a long strip-shaped main circuit board and a plurality of LEDs that are electrically connected to each other, and two ends of the main circuit board are respectively provided with the One electrode of the two different electrodes of the LED is a single electrode end of a single electrode corresponding to each other and electrically connected; a light-transmitting lamp tube is sleeved on the outer peripheral side of the light bar and sleeved at at least one end of the lamp tube A conductive electrode cap is fixed; at least one elastic conductive element is elastically pressed and contacted between the inside of the corresponding electrode cap and the single electrode end. The electrode connection structure of the LED lamp as described in claim 1, wherein the elastic conductive element has the function of elastic expansion and contraction under force, and an electrical contact end that is elastically stretched under the force is in contact with the inner surface of the electrode cap. The end portion, and the other electrical contact end that is under the action of elastic expansion and contraction under force is in contact with an individual electrode end of the light bar. The electrode connection structure of the LED lamp as described in claim 2, wherein the elastic conductive element is a sheet-shaped body that is repeatedly bent between its two electrical contact ends, and at least one of the two electrical contact ends is a sheet-like body. First, form surface contact with at least one of the single electrode end and the inside of the electrode cap. The electrode connection structure of the LED lamp as described in claim 3, wherein the single electrode end faces the elastic conductive element to form an electrical contact surface, and the corresponding electrical contact end of the elastic conductive element forms a contact surface. The electrode connecting structure of the LED lamp as described in claim 2, wherein the elastic conductive element is a spring-like coil that is helically bent between its two electrical contact ends A conductor, and at least one of the two electrical contact ends is in surface contact with at least one of the individual electrode end and the inside of the electrode cap. The electrode connection structure of the LED lamp as described in claim 5, wherein the individual electrode ends face the elastic conductive element to form an electrical contact surface, and the corresponding electrical contact end of the elastic conductive element forms a contact surface. According to the electrode connection structure of the LED lamp described in the claim 1 or 2 or 3 or 4 or 5 or 6, the individual electrode ends of the main circuit board are respectively set at the two ends of the main circuit board, and the transparent The two ends of the optical lamp tube are provided with openings, and the electrode caps are sleeved and fixed respectively. Between each of the electrode caps and the single electrode end, the elastic conductive element is elastically pressed and assembled. The electrode connection structure of the LED lamp as described in the claim 1 or 2 or 3 or 4 or 5 or 6, wherein the inner peripheral surface of the lamp is coated with at least one layer of fluorescent agent. The electrode connection structure of the LED lamp tube as described in claim 7, wherein the inner peripheral side surface of the lamp tube is coated with at least one layer of fluorescent agent. The electrode connection structure of the LED lamp tube as described in claim 8, wherein the inner peripheral surface of the lamp tube is coated with multiple layers of fluorescent agents with different colors.

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