Light-emitting diode (LED) filament strip bulb

Abstract

The utility model discloses an LED filament strip bulb which comprises a lamp holder, a driving circuit board, a COB light source board and a plurality of LED filament strips, and is characterized in that a lamp groove is formed in the lamp holder, the driving circuit board is arranged in the lamp groove, the LED filament strips are annularly distributed on the driving circuit board, and the COB light source board is arranged on the COB light source board. The COB light source plate is located at the top end of the LED lamp filament strip ring and electrically connected with the LED lamp filament strips, lamp feet are arranged on the driving circuit board, and the driving circuit board is fixed to the lamp holder through the lamp feet. Through the structure, the advantages of high lumen, simple structure and assembly, easiness in automation, low cost and good heat dissipation are realized.

Description

Technical Field

[0001] The utility model relates to a light bulb, in particular to an LED filament strip light bulb. Background Art

[0002] LED light strips have the advantages of high brightness, low heat, long service life and environmental protection and are widely used in people's lives, including home lighting and decorative lighting.

[0003] Therefore, the current indoor crystal chandelier bulbs also use LED chips as light sources. However, ordinary LED bulbs (models G4, G9) generally use a patch flexible circuit board as a light source, and its installation structure is as follows: it includes a lamp holder, a cylindrical tube is provided on the lamp holder, and the flexible circuit board is bent into a corresponding cylindrical shape and closely attached to the cylindrical tube to form a 360-degree surrounding light source, and the driving circuit board is arranged in the cylindrical tube.

[0004] But the above structure has some disadvantages:

[0005] 1. The brightness is not high enough, because it uses a patch flexible circuit board, so the chip on the flexible circuit board can only emit light to one side, causing partial light loss, so its overall brightness is not high enough;

[0006] 2. The driver circuit board is set in the cylindrical tube. Because the overall structure of the bulb is very small, the space inside the cylindrical tube is small, and the outer surface of the cylindrical tube is also attached with a flexible circuit board, which makes it difficult for the driver circuit board to dissipate heat;

[0007] 3. The above structure is difficult to install. The space inside the cylinder is small, so it is difficult to install the driver circuit board, and the pasting of the flexible circuit board is also time-consuming.

[0008] 4. The driving circuit board is installed in the cylindrical tube, so it can only be connected to the lamp pins through soft wires, which requires manual welding of the wires. This not only increases the difficulty and time of assembly, but also makes it impossible to achieve mechanized assembly and fully automatic assembly line production.

[0009] Therefore, the applicant uses LED filament strips to replace the flexible circuit board of the SMD lamp beads and designs an LED filament strip bulb to solve the above problems. Utility Model Content

[0010] In order to overcome the deficiencies of the prior art, the utility model provides an LED filament strip light bulb.

[0011] The technical solution adopted by the utility model to solve its technical problems is:

[0012] An LED filament strip light bulb comprises a lamp holder, a driving circuit board, a COB light source board and a plurality of LED filament strips, wherein: a lamp slot is provided in the lamp holder, the driving circuit board is arranged in the lamp slot, the LED filament strips are arranged in a ring on the driving circuit board, and the COB light source board is located at the top of the LED filament strip ring and is electrically connected to the LED filament strips, a lamp pin is provided on the driving circuit board, and the driving circuit board is fixed to the lamp holder through the lamp pin.

[0013] The driving circuit board and the COB light source board are both provided with connection holes, the bottom end of the LED filament strip is inserted into the corresponding connection hole so as to be welded and fixed to the driving circuit board, and the top end of the LED filament strip is inserted into the corresponding connection hole so as to be welded and fixed to the COB light source board.

[0014] A pad is arranged in the lamp slot, and the driving circuit board is placed on the pad.

[0015] A lamp head is arranged under the lamp holder, a through hole penetrating the lamp holder and the lamp head is arranged in the lamp groove, and the end of the lamp pin passes through the through hole and is bent to be locked with the lamp head.

[0016] A slot is provided on the side wall of the lamp holder, and the end of the lamp pin can be inserted into the slot.

[0017] The invention also comprises a lampshade, wherein the bottom edge of the lampshade is provided with an inserting edge, the inserting edge can be inserted into the lamp groove, and the bottom edge of the lampshade can be positioned against the groove wall of the lamp groove.

[0018] The opening of the through hole located at the bottom of the lamp trough is a long hole, and the length of the opening gradually shortens from the bottom of the lamp trough to the bottom surface of the lamp holder.

[0019] The beneficial effects of the utility model are as follows: the utility model adopts an LED filament strip as the light source, and no cylindrical tube is required on the lamp holder, and the filament has a large light-emitting range and can realize 360-degree surrounding light emission, so the light loss emitted by the LED filament strip is small and can be fully utilized, and the lumen is high under the same power, and a driving circuit board and a COB light source board are used as connecting components, so that the LED filament strip and the lamp pin can be directly connected to the driving circuit and the COB light source board to form a whole, so the above-mentioned driving circuit board, the COB light source board and the lamp pin can be assembled in a plug-in manner, and are fixed to the lamp holder through the lamp pin, not only the structure and assembly are simple, but also mechanized assembly is easy to realize and the assembly cost is low, and in addition, the space around the LED filament strip and the driving circuit board is large and can fully dissipate the heat, so the overall heat dissipation is good, thereby improving the service life of the bulb. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0021] Figure 1It is the overall structure diagram of the utility model;

[0022] Figure 2 This is the overall structure diagram of the utility model after removing the lampshade;

[0023] Figure 3 It is an exploded structural diagram of the utility model. DETAILED DESCRIPTION

[0024] The advantages and features of the present disclosure and its implementation methods will be explained by the following embodiments described with reference to the accompanying drawings. However, the present disclosure can be embodied in different forms and should not be interpreted as being limited to the embodiments set forth herein. On the contrary, these embodiments are provided so that the present disclosure will be comprehensive and complete, and will fully convey the scope of the present disclosure to those skilled in the art. In addition, the present disclosure is limited only by the scope of the claims.

[0025] The shapes, sizes, ratios, angles and numbers disclosed in the drawings for describing the embodiments of the present disclosure are only examples, and therefore the present disclosure is not limited to the details shown. Throughout this specification, the same reference numerals refer to the same elements. In the following description, when the detailed description of the relevant known functions or configurations is determined to be unnecessary to blur the focus of the present disclosure, the detailed description will be omitted. In the case of using "including", "having" and "comprising" described in this specification, other parts may be added unless "only" is used. Unless otherwise indicated, the terms in the singular may include plural forms.

[0026] When explaining an element, although not explicitly described, the element is understood to include a range of error.

[0027] When describing a positional relationship, for example, when the positional relationship is described as "on," "above," "below," and "adjacent to," unless "immediately" or "directly" is used, one or more parts may be arranged between two other parts.

[0028] When describing a time relationship, for example, when a time sequence is described as “after,” “subsequently,” “next,” and “before,” discontinuous cases may be included unless “just” or “directly” is used.

[0029] It should be understood that although the terms "first", "second", etc. may be used herein to describe various elements, these elements should not be limited by these terms. These terms are only used to distinguish one element from other elements. For example, a first element may be referred to as a second element, and similarly, a second element may be referred to as a first element without departing from the scope of the present disclosure.

[0030] As those skilled in the art can fully understand, the features of the different embodiments of the present disclosure can be coupled or combined with each other in part or in whole, and can cooperate with each other in various ways and be driven technically. The embodiments of the present disclosure can be performed independently of each other, or can be performed together in a mutually dependent relationship.

[0031] Reference Figures 1 to 3 The utility model discloses an LED filament strip bulb, comprising a lamp holder 1, a driving circuit board 6, a COB light source board 5 and a plurality of LED filament strips 2. A lamp trough 3 is arranged in the lamp holder 1. The lamp holder 1 is generally made of ceramic or plastic, which has high hardness and good insulation. The lamp holder 1 of the present application is preferably truncated cone-shaped, so the lamp trough 3 is also a circular trough, because the circular area is the largest under the same circumference. The driving circuit board 6 is arranged in the lamp trough 3. Of course, the shape of the driving circuit board 6 is also a circular plate. The LED filament strips 2 are arranged in a ring on the driving circuit board 6, and the COB light source board 5 is located at the top of the LED filament strip ring 2 and is electrically connected to the LED filament strip 2, so that top light emission is achieved, thereby increasing the light emission range. The LED filament strips 2 of the present application are preferably four, which are evenly arranged in a vertical ring on the driving circuit board 6. The driving circuit board 6 is provided with lamp pins 4, and the lamp pins 4 are made of thicker metal wires. The driving circuit board 6 is fixed to the lamp holder 1 through the lamp pins 4. The above structure achieves the advantages of high lumen, simple structure and assembly, low cost and good heat dissipation. In the above description, the LED filament strip 2 is an existing product, and thus its specific driving circuit is also an existing technology. The driving circuit is not an improvement point of the present application, and thus its circuit structure is not described in detail.

[0032] In the present application, connection holes 12 are provided on the driving circuit board 6 and the COB light source board 5. The bottom end of the LED filament strip 2 is inserted into the corresponding connection hole 12 so as to be welded and fixed to the driving circuit board 6. The top end of the LED filament strip 2 is inserted into the corresponding connection hole 12 so as to be welded and fixed to the COB light source board 5. The above structure realizes the electrical connection between the LED filament strip 2 and the driving circuit board 6, and the upper and lower parts of the LED filament strip 2 can be fixed, so the connection is more reliable.

[0033] As shown in the figure, a pad 7 is provided in the lamp trough 3, and the driving circuit board 6 is located on the pad 7, so that the driving circuit board 6 is not in direct contact with the bottom surface of the lamp trough 3 and there is a gap between them, which is convenient for heat dissipation. In addition, heat dissipation holes are preferably provided on the bottom surface of the lamp trough 3 to further improve the heat dissipation effect. In addition, the diameter of the driving circuit board 6 corresponds to the diameter of the lamp trough 3, so it can be positioned through the lamp trough 3.

[0034] As shown in the figure, a lamp holder 8 is provided under the lamp holder 1, and the lamp holder 8 is convenient for plugging into the socket. The structure of the lamp holder 8 is square and is a plastic or ceramic body integrally formed with the lamp holder 1. A through hole 9 is provided in the lamp trough 3, which passes through the lamp holder 1 and the lamp holder 8. The end of the lamp pin 4 passes through the through hole 9 and is bent into a U shape to be locked with the lamp holder 8. The plug-in installation of the lamp pin 4 is realized through the above structure, and the end of the lamp pin 4 is exposed outside the plug to facilitate electrical connection with the socket. Moreover, the above bending can be automatically realized by a bending machine after the plug-in installation, so it is also the structure for realizing automatic assembly of this product. As a preferred structure, the opening of the through hole 9 located at the bottom of the lamp trough 3 is a long hole, and the length of the opening gradually becomes shorter from the bottom of the lamp trough 3 to the bottom surface of the lamp holder 8. Because the lamp pin 4 of this product is assembled by inserting it from the bottom of the lamp trough 3 and then passing through the bottom surface of the lamp holder 8, the opening at the bottom of the lamp trough 3 is a long hole to facilitate insertion of the opening during assembly, and then guide it to pass through the bottom surface of the lamp holder 8 through the gradual change of the length of the opening.

[0035] As a further structure, a slot 10 is provided on the side wall of the lamp head 8, and the end of the lamp pin 4 can be inserted into the slot 10, so that the lamp pin 4 can be fixed, and then the driving circuit board 6, the LED filament strip 2 and the lamp pin 4 can be assembled and fixed together by cooperating with the driving circuit board 6.

[0036] As shown in the figure, a transparent lampshade 11 is further included. The bottom edge of the lampshade 11 is provided with an insert edge. The insert edge can be inserted into the lamp trough 3 and the bottom edge of the lampshade 11 can be positioned against the trough wall of the lamp trough 3.

[0037] The LED filament strip bulb provided by the embodiment of the utility model is introduced in detail above. Specific examples are used in this article to illustrate the principle and implementation mode of the utility model. The description of the above embodiments is only used to help understand the method and core idea of ​​the utility model. At the same time, for general technicians in this field, according to the idea of ​​the utility model, there will be changes in the specific implementation mode and application scope. In summary, the content of this specification should not be understood as a limitation on the utility model.

Claims

1. An LED filament strip light bulb, comprising a lamp holder, a driving circuit board, a COB light source board and a plurality of LED filament strips, characterized in that: A lamp groove is provided in the lamp holder, the driving circuit board is arranged in the lamp groove, the LED filament strip is arranged in a ring on the driving circuit board, and the COB light source board is located at the top of the LED filament strip ring and is electrically connected to the LED filament strip, and lamp pins are provided on the driving circuit board, and the driving circuit board is fixed to the lamp holder through the lamp pins.

2. The LED filament strip light bulb according to claim 1, characterized in that: The driving circuit board and the COB light source board are both provided with connection holes, the bottom end of the LED filament strip is inserted into the corresponding connection hole so as to be welded and fixed to the driving circuit board, and the top end of the LED filament strip is inserted into the corresponding connection hole so as to be welded and fixed to the COB light source board.

3. The LED filament strip light bulb according to claim 1, characterized in that: A pad is arranged in the lamp slot, and the driving circuit board is placed on the pad.

4. The LED filament strip light bulb according to claim 1, characterized in that: A lamp head is arranged under the lamp holder, a through hole penetrating the lamp holder and the lamp head is arranged in the lamp groove, and the end of the lamp pin passes through the through hole and is bent to be locked with the lamp head.

5. The LED filament strip light bulb according to claim 4, characterized in that: A slot is provided on the side wall of the lamp holder, and the end of the lamp pin can be inserted into the slot.

6. The LED filament strip light bulb according to claim 1, characterized in that: The invention also comprises a lampshade, wherein the bottom edge of the lampshade is provided with an inserting edge, the inserting edge can be inserted into the lamp groove, and the bottom edge of the lampshade can be positioned against the groove wall of the lamp groove.

7. The LED filament strip light bulb according to claim 4, characterized in that: The opening of the through hole located at the bottom of the lamp trough is a long hole, and the length of the opening gradually shortens from the bottom of the lamp trough to the bottom surface of the lamp holder.

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