Magnetic glue inductor

Abstract

A magnetic rubber inductor is sequentially provided with a magnetic core lower hem, a magnetic core middle column and a magnetic core upper hem which are all magnets, and further comprises a winding wound on the periphery of the magnetic core middle column. Grooves are formed in the two ends of the magnetic core lower hem, and the two ends of the winding are welded in the grooves respectively; wherein the length T1, the width T2 and the height T3 of the inductor are 4 * 4 * 1.8 mm, the depth T4 of the groove is 0.12-0.15 mm, and the width of the groove is 0.45-0.55 mm. The pulse spot welding process is adopted, the width range of the magnetic core wire hanging groove is 0.45-0.55 mm, the preferable depth range is 0.12-0.15 mm, the depth of the groove is small, a spot welding head can make contact with a paint film layer on the surface of a copper wire easily during spot welding, and therefore the spot welding effect is achieved.

Description

TECHNICAL FIELD

[0001] The utility model relates to electronic component field especially relates to a magnetic glue inductor. BACKGROUND

[0002] The magnetic glue inductor is a kind of circuit passive component, is the component that can store up the magnetic energy converted from electric energy.Inductor mainly plays the role of filtering, oscillation, delay, wave-trapping in circuit, also has the effects such as screening signal, filtering noise, stabilizing current and inhibiting electromagnetic wave interference.Usually it is composed of magnetic core, copper wire, glue and other materials.

[0003] At present, after winding, the product needs to be immersed in flux in high-temperature conditions for soldering operation, the enamel film on the surface of copper wire in the magnetic core hanging slot is removed and filled with tin, and the flux and tin beads, tin slag remaining on the product body are also cleaned with ultrasonic wave and cleaning agent and clean water, otherwise the customer end will occur empty welding and short-circuit abnormality when SMT Reflow, and the waste gas, waste residue and energy consumption generated in the soldering process are more.

[0004] At present, the whole inductance industry, magnetic glue inductor manufacturing process is winding+soldering+gluing+cleaning+measuring package, and the product after winding usually adopts soldering mode, and soldering operation is carried out under high-temperature conditions with flux, so as to remove the enamel film on the surface of copper wire in the magnetic core hanging slot to meet the requirement of SMT patch.

[0005] The above content will have some problems:

[0006] 1, soldering temperature is too high, causing the copper wire in the wire package to be damaged, causing product short-circuit abnormality;

[0007] 2, soldering temperature is too high, and after the product is subjected to heat shock, the body will have the risk of dark crack;

[0008] 3, flux is used in soldering process, if residual in wire package after cleaning, high-temperature thermal expansion will also cause product short-circuit abnormality. UTILITY MODEL CONTENT

[0009] To solve the above problems, the technical scheme provides a magnetic glue inductor, and the newly designed inductor is easy to contact the enamel film layer on the surface of copper wire during spot welding by recess cooperation pulse spot welding process, so as to achieve the effect of spot welding.

[0010] To achieve the above purpose, the technical scheme is as follows:

[0011] A magnetic glue inductor, which is sequentially provided with a magnetic core lower swing, a magnetic core middle column and a magnetic core upper swing, all of which are magnetic bodies, further comprising a winding wound around the outer periphery of the magnetic core middle column;

[0012] The two ends of the lower end of the magnetic core are provided with grooves, and the two ends of the winding are welded in the grooves respectively.

[0013] The length T1, the width T2 and the height T3 of the inductor are 4*4*1.8mm, the depth T4 of the groove is between 0.12-0.15mm, and the width is between 0.45-0.55mm.

[0014] In some embodiments, the cross section of the groove is U-shaped and gradually expands from the upper end to the lower end.

[0015] In some embodiments, the inner wall surface of the outer end of the groove is designed to be inclined.

[0016] In some embodiments, the groove is provided with a tin plating layer.

[0017] The application has the following beneficial effects:

[0018] The application uses the pulse spot welding process, and the width of the magnetic core wire hanging groove is 0.45-0.55mm, and the depth is preferably 0.12-0.15mm. The depth of the groove is relatively shallow, so that the spot welding head can easily contact the paint film layer on the surface of the copper wire during spot welding, thereby achieving the effect of spot welding. BRIEF DESCRIPTION OF DRAWINGS

[0019] In order to more clearly illustrate the technical scheme in the embodiments of the present application, the drawings needed in the embodiment description will be briefly introduced as follows.

[0020] Figure 1 is a structural schematic diagram of the embodiment of the present application Figure One ;

[0021] Figure 2 is a structural schematic diagram of the embodiment of the present application Figure Two ;

[0022] Figure 3 is a structural schematic diagram of the embodiment of the present application Figure Three ;

[0023] Figure 4 is a structural schematic diagram of the embodiment of the present application Figure Four . DETAILED DESCRIPTION

[0024] In order to make the technical problems, technical schemes and beneficial effects solved by the present application more clearly understood, the present application will be further described in detail below with reference to the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and do not limit the present application.

[0025] Please refer to Figures 1-4As shown, a magnetic glue inductance is provided with a magnetic core lower swing 1, a magnetic core middle column 2 and a magnetic core upper swing 3 which are all magnetic bodies, and further comprises a winding 4 wound around the outer periphery of the magnetic core middle column 2;

[0026] The magnetic core lower swing 1 is provided with grooves 5 at both ends, and both ends of the winding 4 are welded in the grooves 5 respectively;

[0027] The length T1, the width T2 and the height T3 of the inductance are 4*4*1.8mm, the depth T4 of the groove 5 is between 0.12-0.15mm, and the width is between 0.45-0.55mm;

[0028] To solve the above problems, a new manufacturing process is developed based on the soldering method. The pulse spot welding process is used, and the width range of the groove of the magnetic core hanging wire is 0.45-0.55mm, and the depth range is preferably 0.12-0.15mm. The shallow depth of the groove makes the spot welding head easy to contact the copper wire surface paint film layer during spot welding, thereby achieving the effect of spot welding.

[0029] The pulse spot welding process is used, and the spot welding time is adjusted according to the diameter of the copper wire to damage and attach the copper wire paint film on the groove of the magnetic core to achieve the conduction and fixation of the two ends of the winding. During the spot welding process, there will be no tin beads, tin slag and flux generated as in the current soldering process, so the soldering, cleaning and other processes are directly omitted, thereby avoiding the waste gas generated during the product soldering operation and the waste water after cleaning, reducing the pollution to the environment, greatly improving the product quality and production efficiency, and reducing the labor and comprehensive cost.

[0030] The product size is length (T1) x width (T2) x height (T3) = 4.0 x 4.0 x 1.8mm, the depth range of the groove (5) is preferably 0.12-0.15mm (the numerical range of T4), and the width is 0.45-0.55mm (the numerical range of T5), so that the groove (5) is shallow in depth, making the spot welding head easy to contact the copper wire surface paint film layer during spot welding, thereby achieving the effect of spot welding.

[0031] Operation steps:

[0032] Step 1: Put the magnetic core into the vibration disc on the automatic winding machine for winding operation. After winding, perform wire straightening, cutting and other operations.

[0033] Step 2: After cutting the wire, the corresponding winding ends are welded to the tin-plated groove inside through pulse spot welding, so that the two ends of the winding are combined together with the tin-plated.

[0034] Step 3: The semi-finished product after pulse spot welding is subjected to glue coating operation.

[0035] Step 4: The product after glue coating is subjected to appearance inspection.

[0036] Step 5: The products are tested, unqualified products are removed, and then the products are subjected to external inspection and shipment.

[0037] Step 6: The finished product is obtained, and the production of the magnetic glue inductor is completed.

[0038] In the embodiment, the groove 5 is in a U-shaped cross section and gradually expands from the upper end to the lower end, so that the spot welding head is more convenient to spot the copper wire, and is limited from extending in after reaching a certain depth.

[0039] In the embodiment, the inner wall surface of the outer end of the groove 5 is designed to be inclined, so that the spot welding head has a guiding effect and can accurately spot the copper wire, and the solder paste can also be more gathered in the middle part.

[0040] In the embodiment, the groove 5 is provided with a tin plating layer.

[0041] The above only describes the preferred embodiments of the present application, and is not intended to limit the scope of the present application. Other embodiments having the same or similar principles and basic structures as the present application are within the scope of the present application.

Claims

1. A magnetic glue inductor, characterized by, The magnetic core lower hem (1), the magnetic core middle column (2) and the magnetic core upper hem (3) are sequentially provided with magnets, and further include a winding (4) wound on the outer periphery of the magnetic core middle column (2); Both ends of the magnetic core lower hem (1) are provided with grooves (5), and both ends of the winding (4) are respectively welded in the grooves (5); The length T1, the width T2 and the height T3 of the inductor are 4*4*1.8mm, the depth T4 of the groove (5) is between 0.12-0.15mm, and the width is between 0.45-0.55mm.

2. A magnetic glue inductor according to claim 1, characterized in that: The cross section of the groove (5) is U-shaped, and gradually expands from the upper end to the lower end.

3. A magnetic glue inductor according to claim 1, characterized in that: The inner wall surface of the outer end of the groove (5) is designed to be inclined.

4. The magnetic glue inductor of claim 1, wherein: The groove (5) is provided with a tin plating layer.

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