Dispensing jig for low-leakage-inductance plastic package type driver transformer

Abstract

A low leakage inductance plastic package type driver transformer dispensing jig comprises a lead frame fixing base and a lead frame fixing cover plate, the upper surface of the lead frame fixing base is provided with a plurality of limiting blocks and a plurality of limiting grooves, the limiting blocks are symmetrically arranged on the side edges of the limiting grooves, and the lower end of the lead frame fixing cover plate is provided with a plurality of through grooves. The lead frame fixing base and the lead frame fixing cover plate are assembled through embedding of the limiting blocks and the through grooves. Through the design of the limiting block and the limiting groove, the device is suitable for the application scene that the low-leakage-inductance plastic package type driving transformer is small in size, large in pin number and small in pin distance, envelope wires in the low-leakage-inductance plastic package type driving transformer can be effectively controlled not to be scattered, the low-leakage-inductance plastic package type driving transformer is controlled to be subjected to dispensing operation in the limiting groove, meanwhile, the dispensing position is fixed, and the dispensing efficiency is improved. The consistency of products can be guaranteed, and the production efficiency of the products is improved.

Description

Technical Field

[0001] This utility model belongs to the field of dispensing fixture technology, and in particular relates to a low-leakage plastic-encapsulated drive transformer dispensing fixture. Background Technology

[0002] As the electronics industry rapidly develops towards miniaturization, integration, high frequency, and high reliability, higher requirements are being placed on the electronic components used. For low-power pulse transformers, not only are low leakage inductance, low overshoot, and short rise time required, but also small size, strong common-mode rejection capability, good frequency characteristics, long service life, and high reliability.

[0003] The manufacturing process of low-leakage inductance encapsulated drive transformers relies heavily on the coil dispensing and fixing process. The main purpose of dispensing is to secure the coil windings, preventing them from becoming tangled, and then complete the encapsulation process using a lead frame. The internal electrode electrical properties are then brought out through the leads on the lead frame. Because these low-leakage inductance encapsulated drive transformers are small in size and have a large number of leads, resulting in close lead spacing, fixing the internal coils during manufacturing is extremely difficult, easily leading to poor consistency in internal electrical parameters. Furthermore, existing dispensing fixtures are not suitable for dispensing the internal coils of low-leakage inductance encapsulated drive transformers.

[0004] For example, patent document CN215030745U discloses a dispensing fixture for flat-wire flat-plate transformers, including a flat plate body. A first fixing block is fixedly connected to the middle of the flat plate body, and second fixing blocks are symmetrically fixedly connected to both ends of the flat plate body. Movable clamping blocks are slidably connected between the first and second fixing blocks. A sliding plate is symmetrically fixedly connected to the side of each movable clamping block facing the flat plate body. The other end of the sliding plate extends into the interior of the flat plate body, and a first sliding groove is provided at the connection between the sliding plate and the surface of the flat plate body. The engagement between the locking block and the fixing through hole is controlled by a button, thus controlling the fixation and movement of the movable clamping blocks. The engagement between the locking block and the fixing through hole is ensured by the contraction of a tension spring. This prior art is suitable for dispensing flat-wire flat-plate transformers, but not for low-leakage inductance encapsulated drive transformers.

[0005] Therefore, it is necessary to design a fixture suitable for dispensing low-leakage inductance encapsulated drive transformers, which can effectively prevent the internal windings of low-leakage inductance encapsulated drive transformers from becoming scattered, ensure product consistency, and improve dispensing efficiency. Utility Model Content

[0006] To address the problems existing in the prior art, this utility model provides a low-leakage inductance encapsulated drive transformer dispensing fixture.

[0007] This utility model is implemented as follows: a low-leakage inductance plastic-encapsulated drive transformer dispensing fixture includes a lead frame fixing base and a lead frame fixing cover plate. The upper surface of the lead frame fixing base is provided with multiple limiting blocks and multiple limiting grooves. The limiting blocks are symmetrically arranged on the sides of the limiting grooves. The lower end of the lead frame fixing cover plate is provided with multiple through grooves. The lead frame fixing base and the lead frame fixing cover plate are assembled by the fitting of the limiting blocks and the through grooves.

[0008] Furthermore, the limiting groove is a through groove in the width direction of the upper surface of the lead frame fixing base.

[0009] Furthermore, the limiting grooves are set at the same intervals on the upper surface of the lead frame fixing base.

[0010] Furthermore, the number of limit slots is 6.

[0011] Furthermore, the limiting block is an upwardly protruding cuboid, and the length of the limiting block is less than the width of the lead frame fixing base.

[0012] Furthermore, the limiting block is set on the center line of the horizontal direction of the lead frame fixing base.

[0013] Furthermore, the limiting blocks are alternately set at two different intervals on the upper surface of the lead frame fixing base.

[0014] Furthermore, the spacing between the limit blocks is alternately set at 6mm and 8mm, and the spacing between the limit blocks set on both sides of the limit groove is 6mm.

[0015] Furthermore, the depth of the through groove is greater than or equal to the height of the limiting block, and the width of the through groove is greater than or equal to the total width between the limiting blocks on both sides of the limiting groove.

[0016] Furthermore, the spacing of the through slots corresponds to the spacing of the limiting blocks.

[0017] In summary, the beneficial effects of this utility model are as follows: through the design of the limiting block and the limiting groove, it is suitable for application scenarios where the low leakage inductance encapsulated drive transformer is small in size, has a large number of pins, and results in a small pin spacing. It can effectively control the internal winding of the low leakage inductance encapsulated drive transformer to prevent it from becoming scattered, and control it to perform the dispensing operation within the limiting groove. At the same time, the dispensing position is fixed, which can ensure product consistency and improve product production efficiency. Attached Figure Description

[0018] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings used in the description of the embodiments will be briefly introduced below.

[0019] Figure 1 This is a top view of the lead frame fixing base provided by this utility model;

[0020] Figure 2This is a cross-sectional view of section AA of the lead frame fixing base provided by this utility model;

[0021] Figure 3 This is a left view of the lead frame fixing base provided by this utility model;

[0022] Figure 4 This is a front view of the lead frame fixing cover plate provided by this utility model;

[0023] Figure 5 This is a top view of the lead frame fixing cover plate provided by this utility model;

[0024] Figure 6 This is a left view of the lead frame fixing cover plate provided by this utility model;

[0025] Figure 7 This is an overall structural diagram of the low-leakage inductance encapsulated drive transformer dispensing fixture provided by this utility model;

[0026] The reference numerals are as follows: 1-lead frame fixing base, 2-limiting block, 3-limiting groove, 4-lead frame fixing cover plate, 5-through groove. Detailed Implementation

[0027] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0028] like Figures 1-7 As shown in the figure, this utility model embodiment provides a low-leakage inductance encapsulated drive transformer dispensing fixture, including a lead frame fixing base 1 and a lead frame fixing cover plate 4. The upper surface of the lead frame fixing base 1 is provided with multiple limiting blocks 2 and multiple limiting grooves 3. The limiting blocks 2 are symmetrically arranged on the sides of the limiting grooves 3. The lower end of the lead frame fixing cover plate 4 is provided with multiple through grooves 5. The lead frame fixing base 1 and the lead frame fixing cover plate 4 are assembled by the fitting of the limiting blocks 2 and the through grooves 5. The setting of the limiting blocks 2 and the limiting grooves 3 provides support and limiting fixation during dispensing of the drive transformer coil, improving the efficiency and accuracy of dispensing and ensuring product consistency.

[0029] In this embodiment, the limiting groove 3 is a through groove in the width direction of the upper surface of the lead frame fixing base 1. It is used to place the transformer wire during dispensing and also serves as a limiting groove.

[0030] In this embodiment, the limiting grooves 3 are arranged at equal intervals on the upper surface of the lead frame fixing base 1. This allows for multiple dispensing operations to be performed simultaneously without interfering with each other.

[0031] In this embodiment, six limiting grooves 3 are provided, allowing for six dispensing operations to be performed simultaneously.

[0032] In this embodiment, the limiting block 2 is an upwardly protruding cuboid, and the length of the limiting block 2 is less than the width of the lead frame fixing base 1. It serves to limit and support, confining the part to be glued within the limiting groove 3, preventing the transformer wire from shifting outside the glued area during the glued process.

[0033] In this embodiment, the limiting block 2 is set on the center line of the horizontal direction of the lead frame fixing base 1. It serves to limit and position the adhesive dispensing point, fixing it on the center line of the low leakage inductance plastic-encapsulated drive transformer dispensing fixture, ensuring the consistency of the dispensing position.

[0034] In this embodiment, the limiting blocks 2 are alternately arranged at two different intervals on the upper surface of the lead frame fixing base 1. This allows multiple dispensing points to be applied simultaneously without interfering with each other.

[0035] In this embodiment, the spacing between the limiting blocks 2 is alternately arranged as 6mm and 8mm, and the spacing between the limiting blocks 2 arranged on both sides of the limiting groove 3 is 6mm.

[0036] In this embodiment, the depth of the through groove 5 is greater than or equal to the height of the limiting block 2, and the width of the through groove 5 is greater than or equal to the total width between the limiting blocks 2 on both sides of the limiting groove 3. This enables the lead frame fixing base 1 and the lead frame fixing cover plate 4 to be assembled by fitting the limiting block 2 into the through groove 5. The width of the through groove 5 is just enough to embed the limiting groove 3 and the limiting blocks 2 on both sides of the limiting groove 3 into the groove of the through groove 5.

[0037] In this embodiment, the spacing of the through slots 5 corresponds to the spacing of the limiting blocks 2. This enables the fitting and assembly of the lead frame fixing base 1 and the lead frame fixing cover plate 4.

[0038] In this embodiment, the lead frame fixing base 1 is a cuboid with external dimensions of 96mm in length, 30mm in width, and 7mm in height.

[0039] The lead frame fixing cover 4 is a cuboid with external dimensions of 96mm in length, 25mm in width, and 8mm in height.

[0040] The limiting block 2 is 5.52mm long, 1.2mm wide, and 2.916mm high.

[0041] The limiting groove 3 is 30mm long, 5.16mm wide, and 3.12mm deep.

[0042] The above description is only a preferred embodiment of the present utility model and does not limit the patent scope of the present utility model. All equivalent structural transformations made under the concept of the present utility model and using the contents of the present utility model specification and drawings, or direct / indirect applications in other related technical fields, are included in the patent protection scope of the present utility model.

Claims

1. A dispensing fixture for a low-leakage inductance encapsulated drive transformer, characterized in that: It includes a lead frame fixing base (1) and a lead frame fixing cover plate (4). The upper surface of the lead frame fixing base (1) is provided with multiple limiting blocks (2) and multiple limiting grooves (3). The limiting blocks (2) are symmetrically arranged on the side of the limiting grooves (3). The lower end of the lead frame fixing cover plate (4) is provided with multiple through grooves (5). The lead frame fixing base (1) and the lead frame fixing cover plate (4) are assembled by the fitting of the limiting blocks (2) and the through grooves (5).

2. The low-leakage inductance encapsulated drive transformer dispensing fixture as described in claim 1, characterized in that: The limiting groove (3) is a through groove in the width direction of the upper surface of the lead frame fixing base (1).

3. The low-leakage inductance encapsulated drive transformer dispensing fixture as described in claim 2, characterized in that: Limiting grooves (3) are set at the same intervals on the upper surface of the lead frame fixing base (1).

4. The low-leakage inductance encapsulated drive transformer dispensing fixture as described in claim 3, characterized in that: The number of limit slots (3) is 6.

5. The dispensing fixture for the low-leakage inductance encapsulated drive transformer as described in claim 1, characterized in that: The limiting block (2) is an upwardly protruding cuboid, and the length of the limiting block (2) is less than the width of the lead frame fixing base (1).

6. The dispensing fixture for the low-leakage inductance encapsulated drive transformer as described in claim 5, characterized in that: The limiting block (2) is set on the center line of the horizontal direction of the lead frame fixing base (1).

7. The low-leakage inductance encapsulated drive transformer dispensing fixture as described in claim 6, characterized in that: The limiting block (2) is alternately set at two different intervals on the upper surface of the lead frame fixing base (1).

8. The low-leakage inductance encapsulated drive transformer dispensing fixture as described in claim 7, characterized in that: The spacing between the limit blocks (2) is 6mm and 8mm, and the spacing between the limit blocks (2) on both sides of the limit groove (3) is 6mm.

9. The dispensing fixture for the low-leakage inductance encapsulated drive transformer as described in claim 1, characterized in that: The depth of the through groove (5) is greater than or equal to the height of the limiting block (2), and the width of the through groove (5) is greater than or equal to the total width between the limiting blocks (2) on both sides of the limiting groove (3).

10. The dispensing fixture for the low-leakage inductance encapsulated drive transformer as described in claim 9, characterized in that: The spacing of the through slot (5) corresponds to the spacing of the limiting block (2).

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