CN216054223U - Inductor - Google Patents

Abstract

The utility model provides an inductor, which comprises a framework, pins, a coil and an iron core, wherein the framework is provided with a plurality of pins; the framework is injection molded on the pins, so that a part of the pins is embedded into the framework and is tightly wrapped by the framework; an iron core is arranged in the framework; the coil is wound on the framework and is connected with the pins. Compared with the prior art, the inductor has the advantages that the pins are directly embedded into the framework through injection molding, so that the pins and the framework are tightly and firmly combined, the pins are not easy to separate from the framework after the inductor is stressed, the problem of stress disconnection failure of the inductor is effectively solved, and the reliability of a product is effectively improved. Through setting up the area of contact of anti-drop structure increase pin embedding part and skeleton, make to combine closely firmly between pin and the skeleton, further make inductor atress back pin be difficult for breaking away from the skeleton, effectively solve the problem that inductor atress broken string became invalid, further improve product reliability.

Description

Inductor

Technical Field

The utility model relates to the technical field of electronic elements, in particular to an inductor.

Background

The basic functions of the inductor are filtering, oscillation, delay, trapping and the like, the direct current and the alternating current are conducted in an electronic circuit, the inductive coil has the current limiting function on the alternating current, and the inductive coil and a resistor or a capacitor can form a high-pass or low-pass filter, a phase-shifting circuit, a resonant circuit and the like; the transformer can perform alternating current coupling, voltage transformation, current transformation, impedance transformation and the like.

The inductor is also an energy storage element which stores electric energy in a magnetic form, and the inductor is most commonly used in a circuit to form an LC filter circuit together with a capacitor. As is known, a capacitor has a dc resistance and an ac resistance, while an inductor has a dc resistance and an ac resistance. If the direct current with a plurality of interference signals passes through the LC filter circuit, the alternating current interference signals are consumed by the capacitance changing into heat energy; when the purified direct current passes through the inductor, the alternating current interference signals in the inductor are also changed into magnetic induction and heat energy, and the interference signals with higher frequency are most easily resisted by the inductor, so that the interference signals with higher frequency can be inhibited.

The high-frequency communication inductor is widely used in communication circuits, and communication inductors are used for communication of various interaction interfaces and operation terminals of the central air conditioner. The reliability and the service life of the device directly determine the service reliability and the service life of the whole electric appliance product.

In recent years, with the trend of integrated development of communication circuits and power supply circuits, the usage amount of communication inductors is increasing, and the complaints of end users are also increasing, wherein the most prominent problems are that pins of the communication inductors are separated and the pins are broken, and basically, the communication inductors are stressed to be tilted, and the leads inside the inductors are broken. Research shows that the communication inductor cannot be designed in the middle of the mainboard due to the fact that the communication inductor is large, the communication inductor is distributed at the edge of the mainboard, and staff can easily touch the inductor when operating the clamping plate, the separating plate, the turnover and the like in the production process; and the higher and heavier inductance at the edge position is most prominent and is most easily stressed in the installation process, and if the high-altitude falling condition occurs in the after-sale turnover transportation process, the single board edge pin is greatly stressed. Because the communication inductance skeleton is bakelite, the skeleton molding can be only carried out by injection molding, then the bakelite is drilled, and then the copper clad steel PIN PIN is directly punched and embedded, so that the PIN and the skeleton have certain retention force, but the structural device is very easy to be separated from the skeleton due to external force during practical application, and the PIN is separated from the skeleton due to stress, so that the PIN wire is disconnected due to stress.

SUMMERY OF THE UTILITY MODEL

In view of the above-mentioned disadvantages of the prior art that the lead of the inductor is easily taken off the frame and the lead wire is disconnected, the present invention provides an inductor, which has a firm connection between the lead and the frame and can effectively solve the problem that the lead is easily taken off the frame and the lead wire is disconnected.

The utility model provides an inductor, which comprises a framework, pins, a coil and an iron core, wherein the framework is provided with a plurality of pins; the framework is formed on the pins in an injection molding mode, so that a part of the pins is embedded into the framework and is tightly wrapped by the framework; the iron core is arranged on the framework; the coil is wound on the framework and connected with the pins. The pins are directly embedded into the framework through injection molding, so that the pins and the framework are tightly and firmly combined, the pins are not easy to separate from the framework after the inductor is stressed, the problem of failure of stress disconnection of the inductor is effectively solved, and the reliability of a product is effectively improved.

Preferably, the part of the pin embedded in the framework has an anti-falling structure. The contact area of the pin embedding part and the framework is increased by the anti-falling structure, so that the pin and the framework are tightly and firmly combined.

Preferably, the anti-falling structure is an L-shaped structure, a cross-shaped structure, a square T-shaped structure or a round nail-shaped structure arranged on the pin.

Preferably, on the basis that the pin is provided with the anti-falling structures such as the L-shaped structure, the cross-shaped structure, the square T-shaped structure or the round nail-shaped structure, the pin can be further provided with the thread structure or the sawtooth structure to form a double anti-falling structure, so that the pin and the framework are combined more tightly and firmly.

Preferably, the anti-falling structure is a thread structure or a sawtooth structure arranged on the pin.

Preferably, the skeleton is integrally injection-molded from resin. The framework made of resin materials has good flame-retardant effect.

Preferably, the resin is an epoxy resin.

Preferably, the wire of the coil is an enameled wire.

Preferably, the iron core is an EI-shaped silicon steel sheet.

Compared with the prior art, the inductor has the advantages that the pins are directly embedded into the framework through injection molding, so that the pins and the framework are tightly and firmly combined, the pins are not easy to separate from the framework after the inductor is stressed, the problem of stress disconnection failure of the inductor is effectively solved, and the reliability of a product is effectively improved. Through setting up the area of contact of anti-drop structure increase pin embedding part and skeleton, make to combine closely firmly between pin and the skeleton, further make inductor atress back pin be difficult for breaking away from the skeleton, effectively solve the problem that inductor atress broken string became invalid, further improve product reliability.

The features mentioned above can be combined in various suitable ways or replaced by equivalent features as long as the object of the utility model is achieved.

Drawings

The utility model will be described in more detail hereinafter on the basis of non-limiting examples only and with reference to the accompanying drawings. Wherein:

fig. 1 is a schematic structural diagram of a front surface of an inductor according to an embodiment of the present invention;

fig. 2 is a schematic structural diagram of a side surface of an inductor according to an embodiment of the present invention;

fig. 3 is a schematic structural diagram of a frame and a pin assembly according to an embodiment of the present invention;

fig. 4 and 5 are front and top views of a pin having an L-shaped configuration;

fig. 6 and 7 are front and top views of a pin having a cross-shaped configuration;

fig. 8 and 9 are a front view and a top view of a lead having a square T-shaped structure;

fig. 10 and 11 are front and top views of a pin having a round pin type structure.

Description of reference numerals:

1. a framework; 2. a pin; 3. a coil; 4. an iron core; 11. mounting holes; 41. e-shaped silicon steel sheets; 42. i-shaped silicon steel sheet.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention clearer and more complete, the following technical solutions of the present invention will be described in detail, and all other embodiments obtained by a person of ordinary skill in the art without creative efforts based on the specific embodiments of the present invention belong to the protection scope of the present invention.

All terms (including technical or scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this disclosure belongs unless specifically defined otherwise. It will be further understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the relevant art and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein.

As shown in fig. 1 to 3, the inductor includes a bobbin 1, a pin 2, a coil 3, and a core 4. Skeleton 1 injection moulding makes in some embedding skeleton 1 of pin 2 in the skeleton 2, and the part pin 2 of embedding in the skeleton 1 is closely wrapped up by skeleton 1, utilizes pin 2 to make inductor connect external circuit (like the PCB board). An iron core 4 is arranged on the framework 1; coil 3 is around establishing on skeleton 1, and coil 3 is connected with pin 2. Because pin 2 is inside through moulding plastics direct embedding skeleton 1, combine closely firm between pin 2 and the skeleton 1 for pin 2 is difficult for breaking away from skeleton 1 after the inductor atress, thereby effectively solves the problem that inductor atress broken string became invalid, effectively improves product reliability.

The frame 1 is preferably integrally injection-molded from resin; more preferably, the resin is an oxidized resin. Offer the mounting hole 11 that is used for installing iron core 4 on the skeleton 1, the preferred EI type silicon steel sheet of iron core 4, EI type silicon steel sheet includes matched with E word silicon steel sheet 41 and I word silicon steel sheet 42, and the inserted sheet at the middle part of E word silicon steel sheet 41 is inserted in the mounting hole 11 of skeleton 1, later is connected E word silicon steel sheet 41 and I word silicon steel sheet 42 again, forms day word silicon steel sheet. The wire of the coil 3 is preferably enameled wire, and the enameled wire is wound on the framework 1 to form the coil 3.

In order to improve the bonding strength of the pin 2 and the frame 1, the part of the pin 2 embedded in the frame 1 is provided with an anti-falling structure so as to increase the contact area of the embedded part of the pin 2 and the frame 1, and the pin 2 and the frame 1 are combined more tightly and firmly. As shown in fig. 4 to 11, the anti-falling structure may be a first type of anti-falling structure, such as an L-shaped structure, a cross-shaped structure, a square T-shaped structure, or a round pin-shaped structure, provided on the pin 2. After the pin 2 with the L-shaped structure, the cross-shaped structure, the square T-shaped structure or the round nail-shaped structure is embedded into the framework 1, the contact area between the pin 2 and the framework 1 is increased, and the problem of wire breakage caused by the fact that the pin 2 is separated from the framework 1 can be effectively solved by simulating that the pulling-out value of the pin 2 and the framework 1 exceeds 120N through an actual test.

When the framework 1 is manufactured, the pins 2 are directly placed in the framework 1 mould, and then the resin is injected into the integral framework 1 to enable the pins 2 and the framework 1 to be fixed in an injection molding mode. When the enameled wire is wound on the framework 1, a machine can be adopted for automatic winding, and the winding efficiency is high; when the enameled wire is wound on the framework 1, a secondary wire loosening process is adopted to keep the enameled wire to have sufficient tightness allowance; the part of the welding pin 2 adopts the enameled wire part for welding, the paint film at the upper end of the pin 2 close to the framework 1 is not removed, and the lower end of the pin is removed for welding electrical connection. After the winding on the framework 1 is completed, the middle insertion sheet of the E-shaped silicon steel sheet 41 is inserted into the mounting hole 11 of the framework 1, and then the E-shaped silicon steel sheet 41 is connected with the I-shaped silicon steel sheet 42 to form the Japanese-shaped silicon steel sheet.

Preferably: the pin 2 is provided with an L-shaped structure to form an L-shaped pin, the preferred size of the long end of the L-shaped pin is 1.0-1.2 mm, and the preferred size of the short end of the L-shaped pin is 3.0-3.5 mm; the anti-falling structure of the cross structure can be formed by connecting a plurality of cross structures in series, the diameter of the pin 2 is 1.0-1.2 mm, and the size of the cross structure is preferably 1.15-1.35 mm; the pin 2 is provided with a round nail type structure to form a round nail head pin, the diameter of the pin 2 is 1.0 mm-1.2 mm, and the diameter of the round nail head part is preferably 1.3 mm. The pin 2 is provided with a square T-shaped structure to form a square nail head pin, the diameter of the pin 2 is 1.0 mm-1.2 mm, and the diameter of the square nail head part is preferably 1.3 mm.

In some embodiments, the anti-falling structure may also be a second type of anti-falling structure, such as a thread structure or a sawtooth structure provided on the pin 2. In some embodiments, the first anti-drop structure and the second anti-drop structure may be provided at the same time, for example, on the basis that the pin 2 embedded in the frame 1 is provided with the L-shaped structure, the cross-shaped structure, the square T-shaped structure or the circular nail-shaped structure, the pin 2 embedded in the frame 1 may be further provided with a thread structure or a saw-tooth structure to form a dual anti-drop structure, so that the pin 2 and the frame 1 are combined more tightly and firmly.

Finally, it should be noted that: the above embodiments and examples are only used to illustrate the technical solution of the present invention, but not to limit the same; although the present invention has been described in detail with reference to the foregoing embodiments and examples, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments or examples may still be modified, or some of the technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments or examples of the present invention.

Claims (9)

1. An inductor is characterized by comprising a framework, pins, a coil and an iron core; the framework is formed on the pins in an injection molding mode, so that a part of the pins is embedded into the framework and is tightly wrapped by the framework; the iron core is arranged on the framework; the coil is wound on the framework and connected with the pins.

2. The inductor according to claim 1, wherein a portion of the pin embedded in the bobbin has a drop-off prevention structure.

3. The inductor according to claim 2, wherein the anti-falling structure is an L-shaped structure, a cross-shaped structure, a square T-shaped structure or a round pin-type structure provided on the lead.

4. The inductor as claimed in claim 3, wherein the pins are further provided with a thread structure or a saw-tooth structure.

5. The inductor according to claim 2, wherein the anti-falling structure is a screw structure or a saw-tooth structure provided on a pin.

6. The inductor according to any one of claims 1 to 5, wherein the bobbin is integrally injection molded from a resin.

7. The inductor according to claim 6, wherein the resin is an epoxy resin.

8. An inductor according to any one of claims 1-5, characterized in that the wire of the coil is enameled wire.

9. The inductor as claimed in any one of claims 1 to 5, wherein the iron core is an EI-type silicon steel sheet.

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