CN213366333U

CN213366333U - SMD three-pin inductor

Info

Publication number: CN213366333U
Application number: CN202021623856.1U
Authority: CN
Inventors: 黄锦华
Original assignee: Shenzhen Songdao Technology Co ltd
Current assignee: Shenzhen Songdao Technology Co ltd
Priority date: 2020-08-06
Filing date: 2020-08-06
Publication date: 2021-06-04
Anticipated expiration: 2030-08-06

Abstract

The utility model relates to a SMD tripod inductor, be the magnetic core of I-shaped and around pricking in the winding of magnetic core including the cross-section, public groove has been seted up to the one side of magnetic core to and initial groove and terminal groove based on the mutual symmetry of public groove place axis, two pads are located initial groove and terminal groove, and the both ends of winding are welded respectively in initial groove and terminal groove, and public groove is walked around at the middle part of winding, and initial groove, terminal groove and public groove are provided with the soldering tin layer respectively. This SMD tripod inductor sets up public groove through the middle part at SMD tripod inductor, and initial groove and terminal groove are based on public groove symmetry, and the three forms the parallel state, in the smd paster technical production process, only need increase the step that makes the coil walk the line around public groove, can realize the function of tripod inductor public end, and this SMD tripod inductor is for prior art, and automated production equipment need not to be updated, and the production technology change is little, the automated production of being convenient for, low in production cost.

Description

SMD three-pin inductor

Technical Field

The utility model relates to an inductor technical field especially relates to a SMD tripod inductor.

Background

The three-pin inductor can also be called as an autotransformer, is a transformer with only one winding, and when the three-pin inductor is used as a step-down transformer, a part of wire turns are extracted from the winding to be used as a secondary winding; when used as a step-up transformer, the applied voltage is applied to only a portion of the turns of the winding. The part of the windings belonging to the primary and the secondary are generally called as the common winding, the rest are called as the series windings, and the self-coupled transformer with the same capacity has small size and high efficiency compared with the common transformer, and the larger the transformer capacity is, the higher the voltage is. Therefore, with the development of power systems, the improvement of voltage classes and the increase of transmission capacity, the self-coupling transformer is widely applied due to large capacity, small loss and low manufacturing cost.

Because the three-pin inductor is only used in products such as a water supplement instrument and a sprayer, the application range is small, and the market is small. The two-pin inductor realizes the paster through the smd paster processing technology, and compared with the two-pin inductor, a plurality of public ends of the triangular inductor can not be used for winding and welding end points after welding is started like the two-pin paster inductor is produced. At present, a chip inductor with triangularly distributed soldering tin points is available in the market, the automatic production process and the mechanical action of the chip inductor are complex, new production equipment and production process need to be designed to realize automatic production, and the production cost is high.

SUMMERY OF THE UTILITY MODEL

Therefore, it is necessary to provide a patch type three-pin inductor, which is convenient for automatic production and low in production cost, for solving the problems of complex automatic production process and mechanical action and high production cost of the existing three-pin inductor patch.

A patch type three-pin inductor comprises a magnetic core with an I-shaped cross section and a winding wound on the magnetic core, wherein a common groove, a starting groove and an end groove which are symmetrical based on an axis where the common groove is located are formed in one surface of the magnetic core, a bonding pad is arranged in each of the starting groove and the end groove, two ends of the winding are welded in the starting groove and the end groove respectively, the middle of the winding bypasses the common groove, and a soldering tin layer is arranged in each of the starting groove, the end groove and the common groove.

In one embodiment, the core is a ferrite nickel zinc core.

According to the chip type three-pin inductor, the common groove is formed in the middle of the chip type three-pin inductor, the starting groove and the end groove are symmetrical based on the common groove, the three are in a parallel state, and in the smd chip technology production process, the function of the public end of the three-pin inductor can be realized only by adding the step of enabling the coil to walk around the common groove.

Drawings

Fig. 1 is a schematic structural diagram of a chip three-pin inductor according to an embodiment;

fig. 2 is a top view of a chip three-pin inductor according to an embodiment.

Detailed Description

In order to make the above objects, features and advantages of the present invention more comprehensible, embodiments of the present invention are described in detail below with reference to the accompanying drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. The present invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein, as those skilled in the art will be able to make similar modifications without departing from the spirit and scope of the present invention.

A surface mount type three-leg inductor comprises a magnetic core 1 with an I-shaped cross section and a winding 2 wound on the magnetic core 1, wherein a common groove 11, a starting groove 12 and an end groove 13 which are symmetrical to each other based on the axis of the common groove 11 are formed in one surface of the magnetic core 1, a bonding pad is arranged in each of the starting groove 12 and the end groove 13, two ends of the winding 2 are welded in the bonding pads in the starting groove 12 and the end groove 13 respectively, the common groove 11 is wound by the middle of the winding 2, and a soldering tin layer 3 is arranged in each of the starting groove 12, the end groove 13 and the common groove 11. The magnetic core adopts a ferrite nickel zinc magnetic core. The winding 2 is formed by winding a wire 21. The wires 21 of the winding 2 are located within the solder layer 3. The common groove 11, the starting groove 12 and the ending groove 13 form a cross section of a shape like a Chinese character 'chuan'.

According to the chip type three-pin inductor, the common groove 11 is formed in the middle of the chip type three-pin inductor, the starting groove 12 and the end groove 13 are symmetrical based on the common groove 11, the three are in a parallel state, and in the smd chip technology production process, the function of the public end of the three-pin inductor can be realized only by adding the step of enabling the coil to walk around the common groove 11.

The technical features of the above embodiments can be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the above embodiments are not described, but should be considered as the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only represent some embodiments of the present invention, and the description thereof is specific and detailed, but not to be construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.

Claims

1. A patch type three-pin inductor is characterized by comprising a magnetic core with an I-shaped cross section and a winding wound on the magnetic core, wherein a common groove and a starting groove and an end groove which are symmetrical based on the axis of the common groove are formed in one surface of the magnetic core, a bonding pad is respectively arranged in the starting groove and the end groove, two ends of the winding are respectively welded in the starting groove and the end groove, the common groove is wound by the middle part of the winding, and a soldering tin layer is respectively arranged in the starting groove, the end groove and the common groove.

2. The patch type three-leg inductor according to claim 1, wherein the core is a ferrite nickel zinc core.