CN210467528U

CN210467528U - Chip inductor

Info

Publication number: CN210467528U
Application number: CN201921826078.3U
Authority: CN
Inventors: 陈楚彬
Original assignee: Shenzhen Jiangmeng Magnetic Technology Co ltd
Current assignee: Shenzhen Jiangmeng Magnetic Technology Co ltd
Priority date: 2019-10-26
Filing date: 2019-10-26
Publication date: 2020-05-05
Anticipated expiration: 2029-10-26

Abstract

The utility model discloses a chip inductor, which relates to the technical field of inductor application, and the key point of the technical proposal is that the chip inductor comprises a magnetic core and an enameled wire, wherein the magnetic core comprises a connecting column, a wiring disc and a limiting disc, the enameled wire is wound on the outer side surface of the connecting column, and the wiring disc and the limiting disc are respectively arranged at the two ends of the connecting column; be provided with on the terminal surface that the spliced pole was kept away from to the wiring disc and hold the circular slot, two spacing circular slots have been seted up to the tank bottom that holds the circular slot, spacing circular slot installation and enameled wire electric connection's metal pin, metal pin is including installing perpendicularly in the bracing piece of spacing circular slot tank bottom, fixed connection keeps away from the U-shaped pole of wiring disc one end in the bracing piece, and link in the pole of buckling of bracing piece one end is kept away from to the U-shaped pole, spacing circular slot intussuseption is filled with the glue that is used for the fixed support pole, the U-shaped pole is located the coplanar and is on. The enameled wire has the advantages of difficult shedding of the enameled wire and high stability.

Description

Chip inductor

Technical Field

The utility model relates to an inductance application technology field, in particular to paster inductance.

Background

At present, the electronic components commonly used on the PCB include inductors. Commonly used inductors include chip inductors and package inductors. The chip inductor is an electromagnetic induction element formed by winding an insulated enameled wire (such as an enameled wire, a covered yarn, a covered plastic wire and the like) on an insulated framework or a magnetic core, and belongs to a commonly used inductor element. The paster inductance is characterized in that the paster inductance does not have pins and is directly connected with a circuit through the paster arranged on the magnetic core. Compared with the prior art, the plug-in inductor has a long pin and has obvious advantages in cost compared with the chip inductor. However, when the plug-in inductor is used, a lot of manual work is required for the operation of the plug-in.

At present, chinese patent publication No. CN207676758U discloses a novel chip i-inductor, which includes a magnetic core, an enameled wire disposed on the magnetic core, a thermal shrinkage protection sleeve disposed on the magnetic core, and 2 metal pins connected to the magnetic core; every metal pin all includes horizontal support frame and the vertical pole of being connected perpendicularly with horizontal support frame, and 2 vertical poles all are connected with the magnetic core, and 2 horizontal support frames constitute the horizontal stand that can be connected with the PCB circuit board.

Although this kind of paster inductance can change into the paster mode by the plug-in components mode, the enameled wire is direct to be densely wound on metal pin, and horizontal support frame is relative L shape setting, and when it was installed on the circuit, because the focus directly falls on horizontal support frame, easy because vibrations and take place to rock even topple over to both sides, the enameled wire is taking place to drop or contact not well easily at the in-process of rocking, leads to the short circuit and influences the use.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a paster inductance, it supports paster inductance through forming great support face, inlays metal pin and locates spacing circular slot and use glue to fix it, has the enameled wire and is difficult for droing, advantage that stability is high.

The above technical purpose of the present invention can be achieved by the following technical solutions:

a chip inductor comprises a magnetic core and an enameled wire, wherein the magnetic core comprises a connecting column, a wiring disc and a limiting disc, the enameled wire is wound on the outer side surface of the connecting column, and the wiring disc and the limiting disc are respectively arranged at two ends of the connecting column; the utility model discloses a wiring disc, including wiring disc, spliced pole, metal pin, fixed connection, wiring disc, terminal surface, be provided with on the terminal surface of spliced pole and hold the circular slot, two spacing circular slots have been seted up to the tank bottom that holds the circular slot, spacing circular slot installation and enameled wire electric connection's metal pin, metal pin includes that the U-shaped pole of wiring disc one end is kept away from to the bracing piece, fixed connection in the bracing piece of perpendicular installation in spacing circular slot tank bottom and links in the pole of buckling that bracing piece one end was kept away from to the U-shaped pole, spacing circular slot intussuseption is filled with the glue that is used for fixed.

By adopting the technical scheme, the enameled wire is wound on the connecting column, the circles of the enameled wire are mutually insulated, and any current passing through the enameled wire can generate a magnetic field. And magnetic materials are usually filled in the connecting columns, so that the magnetic field generated by the enameled wires can be greatly enhanced, and the magnetic flux of the magnetic field acts on the circuit. The enameled wire is limited between the wiring disc and cannot be separated. The metal pin inserts into spacing circular slot and is fixed by glue, compares in the comparison file, and it is difficult to take place to rock. Two pairs of U-shaped poles and the pole of buckling mutually support and form great support area, and when U-shaped pole and the pole butt of buckling on the PCB board, the focus of its paster inductance falls on this support area, compares in the contrast file the focus of paster inductance and falls on horizontal support frame, and the paster inductance can be more stable, has reduced and has taken place to rock because of vibrations and turn on one's side to lead to the risk of inefficacy.

Further setting: the U-shaped rod comprises two longitudinal rods which are parallel to each other and two ends of the longitudinal rods are connected to the transverse rods of the longitudinal rods respectively, the longitudinal rods are perpendicular to planes where the two support rods are located, the opening directions of the U-shaped rods are the same, and the bending rods bend towards the adjacent bending rods in the direction away from the U-shaped rods.

Further setting: the U-shaped rod comprises two longitudinal rods which are parallel to each other and two ends of the longitudinal rods are connected to the transverse rods of the longitudinal rods respectively, the longitudinal rods are perpendicular to the planes where the two supporting rods are located, the opening directions of the two U-shaped rods are opposite, and the bending rods are bent towards the adjacent bending rods in the direction away from the U-shaped rods.

Through adopting above-mentioned technical scheme, the holding surface that U-shaped pole and the pole of buckling formed is great, and the center of paster inductance falls in the central part of this holding surface, and paster inductance can be more stable, has reduced and has taken place to rock because of vibrations and turn on one's side to lead to the risk of inefficacy.

Further setting: and the positive end and the negative end of the enameled wire are respectively wound and welded on the part of the support rod, which is positioned in the accommodating circular groove, and the accommodating circular groove is filled with glue for fixing the enameled wire and the support rod.

Through adopting above-mentioned technical scheme, great holding circular slot is favorable to the packing of glue, improves the joint force of glue and wiring disc, and the glue of parcel outside the enameled wire can also protect the enameled wire effectively simultaneously, avoids the enameled wire to break off in daily use. The setting of spacing circular slot for the area of contact of bracing piece and glue is bigger, helps strengthening the power of being connected of glue and bracing piece, thereby reduces the short circuit and the risk of opening circuit.

Further setting: the supporting rod is connected with a limiting plate, the end, far away from the U-shaped rod, of the supporting rod is integrally connected with the limiting plate, and a limiting ring groove is formed in the side face of the end portion, connected with the limiting plate, of the supporting rod.

Through adopting above-mentioned technical scheme, the limiting plate is when being lived by the glue parcel, and its both sides all have glue, compare not set up the limiting plate, and the bracing piece is difficult to deviate from glue. Glue will imbed in the spacing annular when the limiting plate is lived to the parcel for the limiting plate contacts with more glue towards one side of bracing piece, and the bracing piece will receive more glue at the ascending hindrance of bracing piece length direction deviating from spacing circular slot.

Further setting: the side wall of the limiting circular groove gradually inclines outwards in the direction departing from the bottom of the limiting circular groove; the side walls of the receiving circular groove are gradually inclined outwards in the direction away from the bottom of the groove.

By adopting the technical scheme, in the production process, the demoulding is more convenient, and the production efficiency is favorably improved. In addition, the larger notch is also beneficial to glue injection operation.

Further setting: and notches for allowing the enameled wires to pass through are oppositely arranged on the side wall of the accommodating circular groove.

Through adopting above-mentioned technical scheme, the enameled wire can get into from the breach and hold the circular slot to make the enameled wire by the tensioning in breach department, the enameled wire that gets into from breach department and hold the circular slot is wrapped up and is fixed by glue, compares in directly from holding the mode that the circular slot was held in winding on the lateral wall of circular slot, can make the enameled wire obtain bigger degree of protection.

Further setting: the glue is single-component epoxy resin or AB glue.

By adopting the technical scheme, the AB glue has high bonding strength, high hardness and high chemical resistance, can effectively enhance the connecting capacity of the enameled wire and the metal pin, and enhances the connecting capacity of the accommodating circular groove and the metal pin.

The single-component epoxy resin has high mechanical property, strong cohesive force, compact chemical structure and excellent bonding property; meanwhile, the curing volume shrinkage rate is small, the linear expansion coefficient is small, and therefore the internal stress is small, and the adhesive is suitable for bonding of metal pins and magnetic cores.

To sum up, the utility model discloses following beneficial effect has:

1. the inductor is changed from a plug-in type to a surface mount type by bending the metal pins, so that the reduction of steps required by production and processing is less, the production speed is high, and the yield is high;

2. the production and the assembly are very convenient, and the wire only needs to be directly wound and welded on the metal pin and then extends into the fixing groove for glue injection.

3. The connecting part of the metal pin and the wire is effectively protected by glue, and the risks of short circuit and open circuit are reduced.

4. The glue and the metal pin, and the glue and the contact block have strong connecting force and are not easy to fall off.

Drawings

FIG. 1 is a cross-sectional view of a first preferred embodiment lower core;

fig. 2 is a top view of a next chip inductor according to the first preferred embodiment;

fig. 3 is a partial cross-sectional view of a next type of chip inductor according to the first preferred embodiment;

fig. 4 is a top view of a second preferred embodiment of a next chip inductor.

In the figure, the position of the upper end of the main shaft,

1. a magnetic core; 11. a wiring disc; 111. an accommodating circular groove; 112. a limiting circular groove; 12. connecting columns; 13. a limiting disc; 14. a notch;

2. enamelled wires;

3. a metal pin; 31. a support bar; 32. a U-shaped rod; 321. a cross bar; 322. a longitudinal bar; 33. a bending rod; 34. a limiting plate; 35. a limiting ring groove;

4. glue; 5. a rubber tube.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

First preferred embodiment:

the utility model provides a chip inductor, refers to fig. 1, includes magnetic core 1 and enameled wire 2, and magnetic core 1 includes spliced pole 12, wiring disc 11 and spacing disc 13, and wherein spliced pole 12 is cylindricly setting and enameled wire 2 twines on spliced pole 12's lateral surface to form a plurality of coils. Wiring disc 11 and spacing disc 13 are installed respectively on the relative terminal surface of spliced pole 12, and wiring disc 11, spacing disc 13 and spliced pole 12 are coaxial setting, and enameled wire 2 is spacing between wiring disc 11 and spacing disc 13.

Referring to fig. 2 and 3, an end face of the wiring disc 11 away from the connecting column 12 is provided with a containing circular groove 111, an opening direction of the containing circular groove 111 deviates from the connecting column 12, and optionally, side walls on two sides of the containing circular groove 111 gradually incline outwards in a direction away from the bottom of the groove. The diameter of the bottom of the receiving circular groove 111 is smaller than the diameter of the wiring disc 11, and the receiving circular groove 111 is coaxially arranged with the wiring disc 11. The bottom of the circular accommodating groove 111 is further provided with two limiting circular grooves 112, and optionally, the side walls on both sides of the limiting circular grooves 112 are gradually inclined outwards in the direction away from the bottom of the groove.

Referring to fig. 2 and 3, the metal pin 3 includes a support bar 31 vertically installed at the bottom of the limiting circular groove 112, a U-shaped bar 32 fixedly connected to an end of the support bar 31 remote from the wiring disc 11, and a bent bar 33 connected to an end of the U-shaped bar 32 remote from the support bar 31. The limit circular groove 112 is filled with glue 4, so that the part of the support rod 31 located in the limit circular groove 112 is fixed with the limit circular groove 112. The positive and negative ends of the enamel wire 2 are respectively wound around portions of the different support rods 31 located in the receiving circular grooves 111 and are connected to the support rods 31 by welding. Glue 4 is filled in the accommodating circular groove 111, and the end face of the glue 4 far away from the bottom of the accommodating circular groove 111 is flush with the end face of the wiring disc 11 far away from the connecting column 12. The type of the glue 4 can be selected according to actual conditions, and the AB glue is preferably selected in the embodiment, has high bonding strength, high hardness and high chemical resistance, and can effectively enhance the connecting capability of the enameled wire 2 and the supporting rod 31, and enhance the connecting capability of the supporting rod 31, the limiting circular groove 112 and the accommodating circular groove 111.

In addition, a limiting plate 34 is connected to one end of the supporting rod 31 located inside the limiting disc 13, optionally, the shape of the limiting plate 34 may be a disc shape, a square shape or other shapes, preferably a disc shape in this embodiment, and the limiting plate 34 is embedded inside the limiting circular groove 112 and surrounded and bonded by the glue 4. The joint of the limit plate 34 and the support rod 31 is further provided with a limit ring groove 35, and the glue 4 is embedded into the limit ring groove 35. Compared with the situation that the limiting plate 34 and the limiting ring groove 35 are not arranged, the contact area of the metal pins 3 and the glue 4 is larger, and the metal pins 3 are hindered by more glue 4 when being separated from the limiting circular groove 112.

The U-shaped bar 32 includes two parallel longitudinal bars 322 and a cross bar 321 having two ends connected to adjacent ends of the longitudinal bars 322. The longitudinal rods 322 are perpendicular to the plane where the two support rods 31 are located, the opening directions of the U-shaped rods 32 are the same, the U-shaped rods 32 and the bending rods 33 are located on the same plane and parallel to the end face of the limiting disc 13, and the bending rods 33 bend towards the adjacent bending rods 33 in the direction away from the U-shaped rods 32.

The side wall of the accommodating circular groove 111 is relatively provided with a notch 14 for the enameled wire 2 to pass through, the enameled wire 2 can enter the accommodating circular groove 111 from the notch 14, so that the enameled wire 2 is tensioned at the notch 14, the enameled wire 2 entering the accommodating circular groove 111 from the notch 14 is wrapped and fixed by the glue 4, and compared with a mode of directly winding the accommodating circular groove 111 from the side wall of the accommodating circular groove 111, the enameled wire 2 can obtain a larger degree of protection.

A rubber tube 5 is sleeved outside the magnetic core 1 and the enameled wire 2, optionally, the rubber tube 5 can be made of UL, PET or PVC, and UL is preferred in this embodiment. Two ends of the rubber tube 5 are respectively tightly wrapped on the wiring disc 11 and the limiting disc 13. The rubber tube 5 can protect the whole enameled wire 2 and prevent the enameled wire 2 from being corroded due to damp.

Second preferred embodiment: the difference from the first preferred embodiment is that, referring to fig. 4, the opening directions of the U-shaped bars 32 on the two metal pins 3 are opposite.

The above-mentioned embodiments are merely illustrative of the present invention, and are not intended to limit the present invention, and those skilled in the art can make modifications of the present embodiments without inventive contribution as required after reading the present specification, but all the embodiments are protected by patent law within the scope of the present invention.

Claims

1. The chip inductor is characterized by comprising a magnetic core (1) and an enameled wire (2), wherein the magnetic core (1) comprises a connecting column (12), a wiring disc (11) and a limiting disc (13), the enameled wire (2) is wound on the outer side surface of the connecting column (12), and the wiring disc (11) and the limiting disc (13) are respectively arranged at two ends of the connecting column (12); be provided with on the terminal surface of spliced pole (12) is kept away from in wiring disc (11) and hold circular slot (111), two spacing circular slots (112) have been seted up to the tank bottom that holds circular slot (111), spacing circular slot (112) installation and enameled wire (2) electric connection's metal pin (3), metal pin (3) are including installing perpendicularly in bracing piece (31) of spacing circular slot (112) tank bottom, U-shaped pole (32) of keeping away from wiring disc (11) one end in bracing piece (31) and even in U-shaped pole (32) the pole of buckling (33) of keeping away from bracing piece (31) one end, spacing circular slot (112) intussuseption is filled with glue (4) that are used for fixed support pole (31), U-shaped pole (32) and pole of buckling (33) are located the coplanar and are on a parallel with the terminal surface of spacing disc (13).

2. A chip inductor according to claim 1, wherein the U-shaped bar (32) comprises two parallel longitudinal bars (322) and a transverse bar (321) connected to the longitudinal bars (322) at two ends, the longitudinal bars (322) are perpendicular to the plane of the two support bars (31), the opening directions of the U-shaped bars (32) are the same, and the bent bars (33) are bent toward the adjacent bent bars (33) in the direction away from the U-shaped bars (32).

3. A chip inductor according to claim 1, wherein the U-shaped bar (32) comprises two parallel longitudinal bars (322) and a transverse bar (321) connected to the longitudinal bars (322) at two ends, the longitudinal bars (322) are perpendicular to a plane in which the two support bars (31) are located, the two U-shaped bars (32) have opposite openings, and the bent bar (33) is bent toward the adjacent bent bar (33) in a direction away from the U-shaped bar (32).

4. A chip inductor according to claim 1, wherein the positive and negative ends of the enameled wire (2) are respectively wound and welded on the portion of the support rod (31) located in the receiving circular groove (111), and the receiving circular groove (111) is filled with glue (4) for fixing the enameled wire (2) and the support rod (31).

5. The chip inductor according to claim 1, wherein a limiting plate (34) is integrally connected to one end of the supporting rod (31) far away from the U-shaped rod (32), and a limiting ring groove (35) is formed in a side surface of an end portion of the supporting rod (31) connected with the limiting plate (34).

6. A patch inductor according to claim 1, wherein the side walls of the circular limit groove (112) are gradually inclined outward from the groove in a direction away from the bottom of the groove; the side walls of the receiving circular groove (111) are inclined gradually outwards in the direction away from the groove bottom.

7. A chip inductor according to claim 1, wherein the side wall of the circular accommodating groove (111) is provided with notches (14) for allowing the enameled wire (2) to pass through.

8. A patch inductor according to claim 1, wherein said glue (4) is a one-component epoxy or an AB glue.