Optical coupler support frame structure

Abstract

The utility model relates to the technical field of optocoupler supports, in particular to a frame structure of an optocoupler support. Through arranging the hollow groove on the first frame, on the basis of ensuring the fixing effect of the first frame on the optocoupler bracket, the supporting legs of the optocoupler bracket can automatically recover deformation when the optocoupler bracket is packaged and after glue is solidified, so that the reject ratio of the optocoupler bracket caused by the deformation of the supporting legs is reduced, and meanwhile, the yield of the optocoupler bracket is improved in a die bonding and wire welding process. The hollowed-out groove facilitates fixation of a jig during a die bonding and wire welding process and push-pull force detection, in order to guarantee the length of the hollowed-out groove and prevent insufficient fixation strength of the first frame to the optocoupler support, the size related to the hollowed-out groove is set, on one hand, it can be further guaranteed that the supporting feet of the optocoupler support can recover deformation automatically, and on the other hand, the size of the hollowed-out groove is reduced; meanwhile, the fixing effect of the first frame on the optocoupler bracket is ensured; the optical coupler support solves the problem that in the packaging process of an existing optical coupler support, supporting feet are prone to deformation, and consequently products are poor.

Description

Technical Field

[0001] The utility model relates to the technical field of optical coupling brackets, in particular to an optical coupling bracket frame structure. Background Art

[0002] After the optocoupler lead frame is bonded with solder wires, a molding machine is usually used to heat the epoxy resin cake and squeeze it into the mold cavity. In the plastic encapsulation process, the expansion coefficient of the epoxy resin after heating is generally above 2.0, and the molding shrinkage rate is about 0.5. The heated epoxy resin expands and is distributed in each mold cavity. After the mold box is demolded, the colloid quickly encounters cold air and shrinks, causing the optocoupler bracket to warp and deform at its feet. This may cause the entire bracket to bend, resulting in defective products and difficulty in subsequent production operations. The control difficulty is extremely high. Utility Model Content

[0003] In view of the deficiencies in the prior art, the utility model provides a frame structure of an optocoupler bracket, which solves the problem that the legs of the current optocoupler bracket are easily deformed during the packaging process, thereby causing product defects.

[0004] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0005] A frame structure of an optical coupling bracket comprises a plurality of pairs of optical coupling brackets, a U-shaped outer frame as a fixing carrier, and a first frame arranged in the U-shaped outer frame and cooperating with the U-shaped outer frame to fix the plurality of pairs of optical coupling brackets, wherein the first frame is provided with a hollow groove in the same extension direction as the first frame.

[0006] Preferably, the length of the hollow groove along the extension direction of the first frame is less than 70 mm.

[0007] Preferably, the length of the U-shaped outer frame along the extension direction of the first frame is 60 mm to 80 mm.

[0008] Preferably, there are multiple hollow grooves on a single first frame, and the spacing between the hollow grooves is 0.5 mm to 3 mm.

[0009] Preferably, the distance between the hollow groove and the optical coupling bracket is 0.5 mm to 2 mm.

[0010] Preferably, the number of hollow grooves on a single first frame is 2 to 3. Compared with the prior art, the utility model provides an optical coupling bracket frame structure, which has the following beneficial effects:

[0011] 1. By setting a hollow groove on the first frame, on the basis of ensuring the fixing effect of the first frame on the optocoupler bracket, when the optocoupler bracket is packaged, after the glue solidifies, the legs of the optocoupler bracket can restore their deformation by themselves, thereby reducing the defective rate of the optocoupler bracket caused by the deformation of the legs. At the same time, during the die bonding wire process, the hollow groove facilitates the fixation of the jig during the push-pull force detection during the die bonding wire process.

[0012] 2. In order to ensure the length of the hollow groove and prevent the first frame from having insufficient fixing strength on the optical coupling bracket, by setting the dimensions related to the hollow groove, on the one hand, it can further ensure that the legs of the optical coupling bracket can restore their deformation by themselves, while ensuring the fixing effect of the first frame on the optical coupling bracket. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] The drawings described herein are used to provide a further understanding of the present application and constitute a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings:

[0014] Figure 1 It is a schematic diagram of the optical coupling bracket of the utility model;

[0015] Figure 2 It is a partial structural schematic diagram of the optical coupling bracket of the utility model;

[0016] Figure 3 For this utility model Figure 2 Enlarged view of point A in the middle.

[0017] In the figure: 1. Optocoupler bracket; 2. U-shaped outer frame; 3. First frame; 4. Hollow groove. DETAILED DESCRIPTION

[0018] The following will describe the implementation methods of the present application in detail with the help of accompanying drawings and examples, so that the implementation process of how the present application uses technical means to solve technical problems and achieve technical effects can be fully understood and implemented accordingly.

[0019] In order to reduce the product defect rate caused by the deformation of the legs of the optocoupler bracket due to the encapsulation, the utility model provides an optocoupler bracket frame structure, which can release the stress on the optocoupler bracket 1 after the glue solidifies during the encapsulation of the optocoupler bracket 1, thereby reducing the deformation degree of the legs of the optocoupler bracket 1, so as to reduce the product defect rate. Please refer to Figure 1-Figure 3, including several pairs of optical coupling brackets 1, and a U-shaped outer frame 2 as a fixed carrier, and a first frame 3 arranged in the U-shaped outer frame 2 to cooperate with the plurality of pairs of optical coupling brackets 1 to fix the first frame 3, and a hollow groove 4 with the same extension direction as the first frame 3 is opened. The hollow groove 4 is to reduce the rigidity of the first frame 3, so that after the optical coupling bracket 1 is packaged, the legs of the optical coupling bracket 1 can recover part of the deformation under the action of stress. The hollow groove 4 reduces the resistance of the first frame 3 to the deformation recovery process of the legs of the optical coupling bracket 1, thereby improving the yield rate of the optical coupling bracket 1 packaging. At the same time, during the process of solid crystal welding, it is necessary to perform push-pull force detection on the optical coupling bracket 1, and the hollow groove 4 is convenient for fixing the jig during the push-pull force detection during the process of solid crystal welding.

[0020] When the hollow groove 4 is too long, several optocoupler brackets 1 in the middle of the hollow groove 4 may not be fixed, resulting in skewness when placed on the mold. Therefore, it is necessary to ensure the supporting effect of the first frame 3 on several optocoupler brackets 1. The length of the hollow groove 4 along the extension direction of the first frame 3 is less than 70 mm, so that the optocoupler bracket 1 corresponding to the hollow groove 4 can be supported under the action of the first frame 3, while not affecting the deformation recovery ability of the legs of the optocoupler bracket 1 after packaging.

[0021] Since the commonly used size of the packaging mold is limited, in order to ensure that the improved product can be placed in the packaging mold for packaging, the length of the U-shaped outer frame 2 along the extension direction of the first frame 3 is 60mm to 80mm, so that the packaging mold can encapsulate more optocoupler brackets 1 at one time.

[0022] In order to prevent the hollow groove 4 from being too long, which may cause the lack of fixation of several optical coupling brackets 1 in the middle of the hollow groove 4, the number of hollow grooves 4 on a single first frame 3 is multiple, and the spacing between the hollow grooves 4 is 0.5mm to 3mm. Figure 3 As shown in L1, the multiple hollow grooves 4 on the single first frame 3 can be spread throughout the entire first frame 3 as much as possible. At the same time, through the ribs between the two hollow grooves 4, when the first frame 3 is longer, the strength of the first frame 3 can be improved, thereby achieving the fixing effect of the optical coupling bracket 1 located on the first frame 3, and at the same time, the legs of the optical coupling bracket 1 can restore deformation after packaging.

[0023] When the thickness between the hollow groove 4 and the optical coupling bracket 1 is too small, on the one hand, it is not convenient to stamp and form, and it is easy to cause fractures between the hollow groove 4 and the optical coupling bracket 1. On the other hand, it may cause the first frame 3 to have a poor supporting effect on the optical coupling bracket 1. When the thickness between the hollow groove 4 and the optical coupling bracket 1 is too large, it may cause the first frame 3 to have a large resistance to the recovery of the foot of the optical coupling bracket 1. Therefore, the spacing between the hollow groove 4 and the optical coupling bracket 1 is 0.5mm~2mm, such as Figure 3As shown in L2, it can not only ensure the supporting effect of the first frame 3 on the optical coupling bracket 1, but also ensure that the legs of the optical coupling bracket 1 can restore their deformation after packaging.

[0024] Under the current product size, the more hollow grooves 4 there are, the higher the supporting strength of the first frame 3 for the optocoupler bracket 1, and the more difficult it is for the optocoupler bracket 1 to recover from deformation after packaging. The fewer the number of hollow grooves 4, the more likely the position of the optocoupler bracket 1 will be offset. By setting the number of hollow grooves 4 on a single first frame 3 to 2 to 3, the qualified rate of the product after packaging can be maximized.

[0025] It should be noted that, in this article, the terms "comprises", "includes" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or apparatus that includes a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or apparatus.

[0026] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An optical coupling bracket frame structure, comprising a plurality of pairs of optical coupling brackets (1), a U-shaped outer frame (2) as a fixing carrier, and a first frame (3) arranged in the U-shaped outer frame (2) and cooperating with the U-shaped outer frame (2) to fix the plurality of pairs of optical coupling brackets (1), characterized in that: The first frame (3) is provided with a hollow groove (4) extending in the same direction as the first frame (3).

2. The optical coupling bracket frame structure according to claim 1, characterized in that: The length of the hollow groove (4) along the extension direction of the first frame (3) is less than 70 mm.

3. The optical coupling bracket frame structure according to claim 1, characterized in that: The length of the U-shaped outer frame (2) along the extension direction of the first frame (3) is 60 mm to 80 mm.

4. The optical coupling bracket frame structure according to claim 1, characterized in that: The number of hollow grooves (4) on a single first frame (3) is multiple, and the spacing between the hollow grooves (4) is 0.5 mm to 3 mm.

5. The optical coupling bracket frame structure according to claim 1, characterized in that: The distance between the hollow groove (4) and the optical coupling bracket (1) is 0.5 mm to 2 mm.

6. The optical coupling bracket frame structure according to claim 3, characterized in that: The number of hollow grooves (4) on a single first frame (3) is 2 to 3.

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