Lead inlaid strip convenient for guiding and positioning
By designing the lead groove and elastic positioning mechanism on the lead insert strip, the problem of difficult lead frame pressing and assembly in the prior art is solved, and a high-precision and efficient pressing process is achieved, reducing the compression phenomenon and labor cost.
Patent Information
- Application Number
- CN202422124309.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-30
- Publication Date
- 2025-06-10
- Estimated Expiration
- 2034-08-30
AI Technical Summary
In existing semiconductor packaging molds, the lead insert structure design is unreasonable, which leads to difficulty in pressing and mounting of artificial lead frames, prone to errors, and tends to press the ribs. In severe cases, the product is scrapped, and in mild cases, it needs to be reworked, which increases labor costs and resource waste.
A lead insert for easy guiding positioning is designed. Several lead grooves and positioning mechanisms are provided on the insert body. The lead groove notch has a 60° chamfer. The positioning mechanism includes elastically movable T-shaped positioning members, elastic members and installation grooves to ensure the fast and accurate pressing of the lead frame.
Through reasonable lead insert design, high-precision and efficient pressing of the lead frame is achieved, reducing the pressing problem caused by the difficulty of pressing and reducing labor costs and resource waste.
Smart Images
Figure CN222966136U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the field of molds, relates to a lead insert, and particularly relates to a lead insert convenient for guiding and positioning. Background Art
[0002] A semiconductor packaging mold is a device used to produce electronic packaging components, and a lead frame is an important part of an electronic packaging component.
[0003] During the production of existing semiconductor packaging molds, due to the unreasonable structural design of the lead insert for installing the lead frame, it is difficult to manually press-fit the lead frame onto the lead insert, and errors are likely to occur. Therefore, burrs on the lead legs are frequently present, the positions are not fixed, and the direction of the ribbing is the same, resulting in ribbing on the lead frame. When the ribbing is severe, the product can only be scrapped, and when the ribbing is slight, it is necessary to rework to remove the burrs, which increases the labor cost and wastes resources. Summary of the Invention
[0004] The purpose of the utility model is to provide a lead insert convenient for guiding and positioning to solve the above problems in view of the above problems existing in the prior art.
[0005] The purpose of the utility model can be achieved by the following technical solutions: A lead insert convenient for guiding and positioning includes an insert body for press-fitting a lead frame. It is characterized in that a plurality of lead grooves convenient for guiding and press-fitting the lead frame are provided on the insert body, and a plurality of positioning mechanisms for positioning and press-fitting the lead frame are provided on the insert body;
[0006] A chamfer is provided at the opening of the lead groove, and the chamfer angle is 60°;
[0007] The lead frame has a positioning groove that cooperates with the positioning mechanism;
[0008] The positioning mechanism includes an elastically movable positioning member, an elastic member for elastic reset of the positioning member, and an installation groove opened on the end face of the insert body;
[0009] The cross-section of the positioning member is arranged in a T-shaped structure and is movably and limitedly connected in the installation groove;
[0010] The elastic member is located in the installation groove. A shaft platform for sleeving the elastic member is provided at the center of the bottom of the installation groove. Both ends of the elastic member respectively abut and are installed on the bottom of the installation groove and the bottom end of the positioning member.
[0011] In the above-mentioned lead insert convenient for guiding and positioning, the width of the lead groove is 0.01 mm wider than the single-side width of the lead leg on the lead frame. The positioning groove is a thin groove and is a positioning point on the lead frame.
[0012] In the above-mentioned lead insert strip facilitating guiding and positioning, a central groove for the elastic member to be limited and abutted against is provided at the center of the lower end of the positioning member, and the positioning member can axially move along the side wall of the installation groove.
[0013] In the above-mentioned lead insert strip facilitating guiding and positioning, the number of the positioning mechanisms is 4, which are respectively located at the four corners of the corresponding end faces of the insert strip body, and 2 of the positioning mechanisms are located on both sides of a plurality of lead grooves.
[0014] Compared with the prior art, the lead insert strip facilitating guiding and positioning has a reasonable structural design. The lead frame can be quickly guided and press-fitted onto the insert strip body through the positioning mechanism, so that the lead legs of the lead frame are quickly press-fitted into the lead grooves of the insert strip body. At the same time, the width of one side of the lead groove is 0.01 mm wider than that of the lead leg, making the manual press-fitting of the lead frame smooth, realizing the process of highly accurate and efficient press-fitting of the lead frame onto the insert strip body, and reducing the problem of ribbing after the lead frame packaging process due to difficult press-fitting. BRIEF DESCRIPTION OF THE DRAWINGS
[0015] Figure 1 is a simple schematic three-dimensional structure diagram of the lead insert strip facilitating guiding and positioning.
[0016] Figure 2 is a simple schematic diagram of the lead groove structure in the lead insert strip facilitating guiding and positioning.
[0017] Figure 3 is a simple schematic diagram of a partial section of the positioning mechanism in the lead insert strip facilitating guiding and positioning.
[0018] In the figure, 1. insert strip body; 2. lead groove; 3. positioning member; 4. elastic member; 5. installation groove; 6. shaft table; 7. central groove. DETAILED DESCRIPTION OF THE EMBODIMENTS
[0019] The following are specific embodiments of the present invention and in combination with the drawings, the technical solutions of the present invention are further described, but the present invention is not limited to these embodiments.
[0020] Such as Figure 1 、 Figure 2 、 Figure 3As shown in the figure, the lead insert strip for facilitating guiding and positioning includes an insert strip body 1 for press-fitting the lead frame. A number of lead grooves 2 for facilitating the guiding and press-fitting of the lead frame are provided on the insert strip body 1. A number of positioning mechanisms for positioning and press-fitting the lead frame are provided on the insert strip body 1. A chamfer is provided at the notch of the lead groove 2, and the chamfer angle is 60°. The lead frame has a positioning groove that cooperates with the positioning mechanism. The positioning mechanism includes an elastically movable positioning member 3, an elastic member 4 for elastic reset of the positioning member 3, and an installation groove 5 opened on the end face of the insert strip body 1. The cross-section of the positioning member 3 is arranged in a T-shaped structure and is movably and limit-connected in the installation groove 5. The elastic member 4 is located in the installation groove 5. A shaft platform 4 for sleeving the elastic member 4 is provided at the center of the bottom of the installation groove 5. Both ends of the elastic member 4 respectively abut and are installed on the bottom of the installation groove 5 and the bottom end of the positioning member 3.
[0021] The above structure is reasonably designed. The lead frame can be quickly guided and press-fitted onto the insert strip body 1 through the positioning mechanism, so that the lead legs of the lead frame are quickly press-fitted into the lead grooves 2 of the insert strip body 1. At the same time, the width of one side of the lead groove 2 is 0.01 mm wider than that of the lead leg, making the manual press-fitting of the lead frame smooth, realizing the process of highly accurate and efficient press-fitting of the lead frame onto the insert strip body 1, and reducing the problem of ribbing after the lead frame encapsulation process due to difficult press-fitting.
[0022] Further elaborating, in order to facilitate the guiding and positioning of the pre-press-fitted lead frame by the positioning member 3, the width of the lead groove 2 is 0.01 mm wider than that of the lead foot on the lead frame. The positioning groove is a thin groove and is the positioning point on the lead frame.
[0023] The positioning member 3 cooperates with the positioning groove for positioning and is manually pressed onto the insert strip body 1 and sent into the encapsulation mold for stamping. Since the elastic member 4 is provided at the bottom of the positioning member 3, elastic reset can be realized. Through the structural design of the axially movable positioning member 3 and the lead groove 2, the lead frame can be quickly pressed onto the insert strip body 1.
[0024] Further elaborating, in order to facilitate the abutting and limiting installation of the elastic member 4, a central groove 7 for the elastic member 4 to abut and be limited is provided at the center of the lower end of the positioning member 3. The positioning member 3 can move axially along the side wall of the installation groove 5.
[0025] Further elaborating, in order to realize the stable and rapid pressing of the lead frame onto the insert strip body 1, the number of the positioning mechanisms is 4, which are respectively located at the four corners of the corresponding end faces of the insert strip body 1, and 2 of the positioning mechanisms are located on both sides of a number of lead grooves 2.
[0026] The specific embodiments described herein are merely illustrative of the spirit of the present utility model. Those skilled in the art to which the present utility model pertains can make various modifications or supplements to the described specific embodiments or use similar ways for substitution, but will not deviate from the spirit of the present utility model or exceed the scope defined by the appended claims.
[0027] Although terms such as insert body 1, lead wire groove 2, positioning member 3, elastic member 4, installation groove 5, shaft platform 4, center groove 7, etc. are used more frequently herein, the possibility of using other terms is not excluded. These terms are only used to more conveniently describe and explain the essence of the present utility model; interpreting them as any additional limitation is contrary to the spirit of the present utility model.
Claims
1. A lead frame insert that facilitates guiding and positioning, comprising a lead frame insert body (1) for press-fitting onto a lead frame, characterized in that: A plurality of lead grooves (2) are provided on the insert body (1) for facilitating the guiding and pressing of the lead frame, and a plurality of positioning mechanisms for positioning and pressing the lead frame are provided on the insert body (1); The notch of the lead groove (2) has a chamfer, and the chamfer angle is 60°; The lead frame is provided with a positioning groove which cooperates with the positioning mechanism; The positioning mechanism comprises an elastically movable positioning member (3), an elastic member (4) used for elastically resetting the positioning member (3), and a mounting groove (5) formed on the end surface of the insert body (1); The positioning member (3) has a T-shaped cross section and is movably limited and connected in the installation groove (5); The elastic member (4) is located in the installation groove (5), and the center of the bottom of the installation groove (5) has a pillow block (6) for the elastic member (4) to be sleeved, and the two ends of the elastic member (4) are respectively mounted against the bottom of the installation groove (5) and the bottom end of the positioning member (3).
2. A lead strip for facilitating guiding and positioning according to claim 1, characterized in that: The width of the lead groove (2) is 0.01 mm relative to the single-side width of the lead pin on the lead frame. The positioning groove is a thin groove and is a positioning point on the lead frame.
3. A lead strip for facilitating guiding and positioning according to claim 1, characterized in that: A central groove (7) for the elastic member (4) to limit and abut against is provided at the center of the lower end of the positioning member (3), and the positioning member (3) can move axially along the side wall of the installation groove (5).
4. A lead strip for facilitating guiding and positioning according to claim 1, characterized in that: There are four positioning mechanisms, which are respectively located at four corners of the corresponding end faces of the insert body (1), and two of the positioning mechanisms are located on both sides of a plurality of lead grooves (2).