WO2019062858A1

WO2019062858A1 - Receiver coil and winding process therefor, and fabrication method for coil body in coil

Info

Publication number: WO2019062858A1
Application number: PCT/CN2018/108344
Authority: WO
Inventors: 魏旦丰
Original assignee: 深圳倍声声学技术有限公司
Priority date: 2017-09-28
Filing date: 2018-09-28
Publication date: 2019-04-04
Also published as: CN107635167A

Abstract

Disclosed in the embodiments of the present application are a receiver coil, a winding process therefor, and a fabrication method for a coil body in the coil. The receiver coil comprises: the coil body and a conductor line, wherein the coil body comprises a skeleton, a first terminal, a second terminal and a yoke; the skeleton comprises a first body, a conductor line winding part and a second body connected in order; the yoke is sleeved on the first body; the conductor line winding part is located between the first body and the second body; the first terminal and the second terminal are symmetrically embedded at two ends of the second body and protrude from the upper and lower surfaces of the second body; the conductor line is wound on the outer surface of the conductor line winding part; and two ends of the conductor line are respectively connected to the first terminal and the second terminal. By means of the described configuration, the embodiments of the present application may improve production efficiency, reduce costs, and improve the quality of a receiver coil.

Description

Receiver coil, winding process thereof and method for manufacturing coil body in coil

Technical field

The embodiments of the present application relate to the field of receivers, and in particular, to a receiver coil, a winding process thereof, and a method of manufacturing a coil body in a coil.

Background technique

As mobile iron receivers are used in large-scale applications in consumer electroacoustic devices, cost control and automation of mass production become more and more important.

The coil is an indispensable component in the receiver and is the heart component in the design of the speaker and receiver. At present, the moving iron receiver is mainly composed of two parts: the main body and the lead wire. Due to the performance requirements of the receiver, the wire diameters of the wires used in the two parts are different, and the wire diameter of the lead wire needs to be thicker than the main body wire. The main body winding is completed on the semi-automatic winding machine, and an auxiliary winding jig is needed. The machine can only make one coil at a time. After the winding is completed, the auxiliary jig needs to be scrapped. The combination of the body and the lead needs to be completed manually under the microscope. The technical solution is: after the body is wound, the wire end of the body wire is wound on the lead for 2-3 turns, and then the solder is used to weld the two together. Manually cut the lead length and solder it to the FPC.

This technical solution is semi-automatic and semi-manual, with low production efficiency, limited production capacity, not suitable for large-scale production, and labor costs are increasing, resulting in high cost of coil finished products; wire bonding is done manually under the microscope, lead wire The diameter needs to be thicker than the bulk line, and it is easy to cause defects during soldering. The tin particles generated during soldering will randomly adhere to the surface of the coil, causing quality hazards.

Summary of the invention

The technical problem to be solved by the embodiments of the present application is to provide a receiver coil, a winding process thereof, and a method for manufacturing a coil body in a coil, which utilizes an integrally formed coil bobbin design and a fully automatic winding method of a wire diameter wire. Increase productivity, reduce costs, and improve the quality of the receiver coils.

In order to solve the above technical problem, a technical solution adopted by the embodiment of the present application is to provide a receiver coil, which includes: a coil body and a wire,

The coil body includes a skeleton, a first terminal, a second terminal, and a yoke;

The skeleton includes a first body, a wire winding portion and a second body that are sequentially connected;

The yoke is sleeved on the first body;

The wire winding portion is located between the first body and the second body,

The first terminal and the second terminal are symmetrically embedded at two ends of the second body and protrude from upper and lower surfaces of the second body;

The wire is wound around an outer surface of the wire winding portion, and two ends of the wire are respectively connected to the first terminal and the second terminal.

The portions of the first terminal and the second terminal protruding from the upper surface of the second body are respectively a starting end of the wire and an end of the wire, and the lower surface of the second body is protruded. The parts are the positive and negative poles of the conductive output.

The height of the conductive output end protruding from the lower surface of the second body is greater than the height of the initial hanging end and the end hanging end extending from the upper surface of the second body.

Wherein, the wire winding portion is two symmetrical small square columns.

Wherein, the middle portion of the first body and the second body respectively define a receiving cavity for placing the vibration piece of the armature.

Wherein, the upper and lower sides of the first body are provided with symmetrical grooves for mounting magnets, and the shape of the grooves is matched with the shape of the magnet.

Wherein all the wires of the wire have the same wire diameter.

The first body includes a fixing portion, a connecting portion and a supporting portion that are sequentially connected.

The fixing portion is an annular structure connected to one end of the wire winding portion;

The yoke is sleeved on the connecting portion, and an inner wall structure of the yoke is adapted to an outer wall structure of the connecting portion.

In order to solve the above technical problem, another technical solution adopted by the embodiment of the present application is to provide a winding process of a receiver coil, which is characterized in that:

Inserting the coil body into the winding carrier;

Along the outer side of the starting hanging end, the wire is wound 4-8 turns from top to bottom at the starting hanging end;

Rotating the winding carrier at a constant speed to wind the wire around the wire winding portion, and making the wire uniform in the winding portion of the wire;

Along the outer side of the end of the hanging wire, the wire is wound 4-8 times from the bottom to the end at the end of the hanging wire end, and then the wire is cut off;

The winding carrier runs to a welding position, and the initial hanging end and the ending hanging end are respectively welded to both ends of the wire.

In order to solve the above technical problem, another technical solution adopted by the embodiment of the present application is to provide a method for manufacturing a coil body as described above, which includes:

Fixing the yoke, the first terminal and the second terminal to a position corresponding to the mold;

The plastic raw rubber is injected on the basis of the inner wall of the yoke, and is cooled and molded.

The beneficial effects of the embodiments of the present application are: different from the prior art, the embodiment of the present application determines the winding mode of the coil by manufacturing the integrally formed coil body, the combination of the coil and the terminal, and fixes the coil by using the terminal hanging wire tension. At the beginning and the end, the coil is not deformed. Only the wire of the same wire diameter is required to complete the winding process. It is not necessary to use the tweezers to wind and weld the coil body wire and the lead under the microscope, thereby avoiding the soldering and welding caused by the manual welding. The ball adheres to the surface of the coil and other quality hazards. It also eliminates the steps of glue coating, manual soldering of leads and FPC. The fully automatic production method also greatly reduces the labor cost and improves the production efficiency.

DRAWINGS

The one or more embodiments are exemplified by the accompanying drawings in the accompanying drawings, and FIG. The figures in the drawings do not constitute a scale limitation unless otherwise stated.

1 is a schematic structural diagram of a receiver coil provided by an embodiment of the present application;

2 is a schematic structural diagram of a receiver coil body according to an embodiment of the present application;

3 is a schematic structural diagram of a receiver frame provided by an embodiment of the present application;

Figure 4 is a front elevational view of Figure 1 provided by an embodiment of the present application;

Figure 5 is a cross-sectional view taken along line A-A of Figure 4 provided by an embodiment of the present application;

6 is a flow chart of a winding process of a receiver coil provided by an embodiment of the present application;

FIG. 7 is a flow chart of a method for manufacturing a coil body according to an embodiment of the present application.

Detailed ways

In order to facilitate the understanding of the present application, the present application will be described in more detail below with reference to the accompanying drawings and specific embodiments. It is to be noted that when an element is described as being "fixed" to another element, it can be directly on the other element or one or more of the elements in the middle. When an element is referred to as "connected" to another element, it can be a <RTI ID=0.0> </ RTI> </ RTI> <RTIgt; The orientation or positional relationship of the terms “vertical”, “horizontal”, “left”, “right”, “upper”, “lower”, “inside”, “outside”, “bottom”, etc. as used in this specification. The orientation and the positional relationship shown in the drawings are merely for the convenience of the description and the description, and are not intended to indicate or imply that the device or component referred to has a specific orientation, is constructed and operated in a specific orientation, and therefore cannot It is understood to be a limitation on the present application. Moreover, the terms "first", "second", etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

Unless otherwise defined, all technical and scientific terms used in the specification are the same meaning The terms used in the specification of the present application are for the purpose of describing the specific embodiments, and are not intended to limit the application. The term "and/or" used in this specification includes any and all combinations of one or more of the associated listed items. Further, the technical features involved in the different embodiments of the present application described below may be combined with each other as long as they do not constitute a conflict with each other.

Referring to FIG. 1, the receiver coil 1 includes a coil body 100 and a wire 200 wound around an outer surface of the wire winding portion 12, and two ends of the wire 200 are connected to the first terminal 20 and the second terminal 30, respectively.

All portions of the wire 200 have the same wire diameter. The coil is an important part of the moving iron receiver. The current coil adopts a semi-manual semi-automatic winding method. After the coil is wound, it needs to be removed. The wire diameter of the coil body and the lead wire are different. The wire diameter of the lead wire needs to be thicker than the body wire, so the combination of the body and the wire needs to be manually completed by the operator under the microscope, and the wire cutting is still required in the subsequent process and the customer input end is required for the external welding. In the embodiment of the present application, the wire 200 of the same wire diameter is used from the starting wire end 21 to the wire winding portion 12 to the end of the wire end 31, and the whole process adopts fully automatic winding and automatic metal welding. In the manner, the tension of the wires wound by the first terminal 20 and the second terminal 30 ensures that the coil body is tight and not loose, and the glue coating of the winding process is omitted.

2 and 3, the coil body 100 includes a skeleton 10, a first terminal 20, a second terminal 30, and a yoke 40. The skeleton 10 includes a first body 11, a wire winding portion 12, and a second body that are sequentially connected. 13. The yoke 40 is sleeved on the first body 11 , and the first terminal 20 and the second terminal 30 are symmetrically embedded at two ends of the second body 13 and protrude from the second body 13 . ,lower surface.

The first body 11 includes a fixing portion 111, a connecting portion 112 and a supporting portion 113 which are sequentially connected. The fixing portion 111 is an annular structure and is connected to one end of the wire winding portion 12, and the yoke 40 is sleeved. Provided in the connecting portion 112, the inner wall structure of the yoke 40 is adapted to the outer wall structure of the connecting portion 112. The structure of the yoke is generally a laminated type and a cast type. The laminated type is first formed by punching to form an annular sheet having a yoke sectional feature, and finally the stacked sheets are connected by a resistance welding method to form a yoke. . In some embodiments, the structure of the yoke can be set according to actual needs.

The wire winding portion 12 is two symmetrical small square columns, and the two square columns are in a parallel relationship. As a frame around which the wire 200 is wound, the shape of the coil is supported, and one end of the wire winding portion 12 is connected to the first body 11 The other end is connected to the second body 13.

When the moving iron receiver works, the alternating current induces an alternating magnetic field through the coil, and the alternating magnetic field magnetizes the armature, and the magnetized armature and the magnet move up and down according to the principle of homosexual reciprocation and opposite attraction. The upper and lower sides of the first body 11 are provided with symmetrical grooves, which are respectively a first body upper groove 114 and a first body lower groove 115. The groove is used for mounting a magnet, and the groove is shaped and shaped. The shape of the magnet is matched, for example, a rectangular sheet having a shape of a magnet of 1.8 mm*0.5 mm*0.25 mm, and the size of the groove is 1.8 mm*0.5 mm*0.25 mm, and the groove is generally larger than the shape of the magnet. A certain margin is left for ease of installation, and it is also possible to reduce the defect of the coil body 100 during automated production within the margin of error. When the magnet is installed, the position of the supporting portion 113 is pushed in parallel corresponding to the groove, and the connection between the magnet and the yoke can be completed by laser welding, or can be fixed by glue and spring steel sheet. The way to bake is connected.

In the moving iron receiver, the armature includes a fixing piece, a vibrating piece, and a connecting portion that connects the fixing piece and the vibrating piece. The fixing piece of the armature is fixedly connected to the yoke, and the vibrating piece of the armature is suspended at a position near the middle of the coil structure, so as to reserve enough free vibration space for the vibrating piece and hang between the two permanent magnets. In the initial state of non-energization, the end of the vibrating piece is connected with one end of the transmission rod, and the vibrating plate and the diaphragm combination are connected with the other end of the transmission rod. When the moving iron receiver is working, the end of the vibrating piece drives the vibrating plate through the transmission rod. The vibration is combined with the diaphragm to make a sound. In this embodiment, a middle portion of the first body 11 and the second body 13 defines a receiving cavity, which is a receiving cavity 110 of the first body, and a receiving cavity 130 of the second body. Place the vibrating piece of the armature. The accommodating cavity 110 of the first body, the accommodating cavity 130 of the second body, and the two symmetrical small square pillars of the wire winding portion 12 are combined to form an internal space for placing the armature The vibrating piece, and since the connecting portion 112 has a certain thickness, provides a space in which the vibrating piece tail portion of the armature freely vibrates.

Referring to FIG. 5, the first terminal 20 and the second terminal 30 are two identical irregularly shaped metal foils, which are generally electrically conductive, strong, corrosion resistant and easy to tin. In order to prevent the terminal from rusting, the material is often plated with a layer of metal such as copper, nickel, silver or gold. In some embodiments, the shape of the first terminal 20 and the second terminal 30 may be inconsistent, for example, the first terminal 20 is a cylindrical rod-shaped structure, and the second terminal 30 may be a rectangular rod shape. Structure, as another example, the first terminal 20 and the second terminal 30 are two completely different irregularly shaped metal foils.

The first terminal 20 and the second terminal 30 are symmetrically embedded in the second body 13 and protrude from the upper and lower surfaces of the second body 13 . The portions of the first terminal 20 and the second terminal 30 that protrude from the upper surface of the second body 13 are respectively the initial hanging end 21 of the wire, the ending hanging end 31, and the second protruding The portions of the lower surface of the body 13 are respectively a conductive output terminal positive electrode 22 and a conductive output terminal negative electrode 32. In the embodiment of the present application, the initial hanging end 21 and the ending hanging end 31 are rectangular sheets of the same height and shape, and the conductive output terminal 22 and the conductive output terminal 32 are provided. a rectangular sheet having a highly uniform shape and the same shape, the width of the positive electrode 22 of the conductive output terminal is greater than the width of the starting wire end 21, and the positive electrode 22 of the conductive output extends beyond the lower surface of the second body 13. The height is greater than a height of the starting hanging end 21 protruding from the upper surface of the second body 13.

It is to be understood that the terms "first", "second", etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance, and embodiments of the present application do not limit the first terminal 20 and the described The relative positional relationship of the second terminal 30, and does not limit the initial hanging end 21 will necessarily correspond to the positive output 22 of the conductive output, which can be adjusted according to the design of the actual coil.

In some embodiments, the heights of the initial hanging end 21 and the ending hanging end 31 may be inconsistent, and different shapes or shaped pieces may be disposed according to requirements. Similarly, the conductive output may be obtained. The heights of the terminal positive electrode 22 and the conductive output terminal negative electrode 32 may be inconsistent, and different shapes or shaped members may be provided as needed. The height of the conductive output terminal positive electrode 22 extending from the lower surface of the second body 13 may be greater than, equal to, or smaller than the height of the starting wire end 21 protruding from the upper surface of the second body 13.

Referring to FIG. 6, FIG. 6 is a winding process of a receiver coil 1 according to an embodiment of the present application, including:

S61: insert the coil body 10 into the winding carrier;

The winding machine can be divided into simple type, semi-automatic type and fully automatic type according to the degree of automation. The electronic control mode has a numerical control type single-chip microcomputer and computer control, and is classified into a desktop type and a floor type according to the installation manner. Wire winding machine adopts PLC system control, man-machine interface parameter input, frequency converter drive, sensor monitoring, can strictly achieve constant line speed, constant tension, easy operation; I-shaped wheel as carrier of coil body, detachable, left and right line The disc can be separated, which is convenient for loading and unloading wires, and is suitable for winding various wires. In the embodiment of the present application, the winding carrier is a multi-axis automatic winding machine, and the wound coil body 100 is placed in the center of the turntable of the winding machine or is set on the rotation of the winding machine. unit.

S62: along the outer side of the starting hanging end 21, the wire 200 is wound 4-8 turns from the top to the bottom at the starting hanging end 21;

Fixing the nozzle of the wire 200 to the starting wire end 21 in the direction from top to bottom is for smoother proceeding to the next step, that is, the wire 200 is uniformly wound around the wire winding portion 12, which One direction is determined by the position of the starting wire end 21 and the wire winding portion 12, which is higher in the vertical direction than the wire winding portion 12. Winding the wire 200 at the starting wire end 21 for 4-8 turns is to ensure that the wire at the starting end is sufficiently fastened.

In some embodiments, in order to facilitate the fixed connection of the wire to the starting wire end 21, two symmetric small notches may be opened at both ends of the starting wire end 21, or at the beginning A small circular hole is opened at a position in the middle of the hanging end 21, and the nozzle of the wire passes through the circular hole before starting the hanging line, and the position of the circular hole can be positioned by using the positioning device of the multi-axis automatic winding machine.

S63: rotating the winding carrier at a constant speed to wind the wire 200 around the wire winding portion 12, and distributing the wire 200 uniformly in the wire winding portion 12;

After the wire is firmly fixed to the initial wire end 21, the wire is wound along the outer walls of the two small square pillars of the wire winding portion 12. The winding carrier can set the rotational speed, and the uniform rotation can ensure that the wound coils are arranged in a tightly uniform manner, so that the wires wound around the wire winding portion 12 are evenly distributed in the wire winding portion 12.

S64: along the outer side of the end hanging end 31, the wire 200 is wound 4-8 times from the bottom to the end of the end hanging end 31, and then the wire is cut;

The wire 200 is wound at the end of the end of the wire end 31 in a downward-to-up direction, which is determined by the position of the end wire end 31 and the wire winding portion 12, the wire winding portion 12 being The position in the vertical direction is lower than the position at which the end hanging end 31 is located. The wire 200 is wound around the end of the wire end 31 for 4-8 turns, and the wire is cut to ensure that the wire at the end is sufficiently fastened.

S65: The winding carrier runs to a welding position, and the starting hanging end 21 and the ending hanging end 31 are respectively welded to both ends of the wire.

After all the windings are completed, the winding mechanism is controlled to move to the welding position through the human-machine interface input parameter, and the starting wire end 21 and the front nozzle of the wire are automatically automatically replaced by a metal welding process. The end nozzles that terminate the hanging end 31 and the wires are welded together.

In the embodiment of the present application, the winding mode of the coil is determined by manufacturing the integrally formed coil body, the combination of the coil and the terminal, and the winding of the terminal is used to fix the coil and the end ensures that the coil is not deformed, and only the same wire diameter is required. The wire completes the whole winding process, and does not need to use the tweezers to entangle and weld the coil body wire and the lead under the microscope, thereby avoiding the quality defects such as the virtual welding caused by the manual welding and the surface of the solder ball attached to the coil, and also eliminating the glue. The steps of coating, hand soldering leads and FPC, fully automatic production methods also greatly reduce labor costs and improve production efficiency.

Referring to FIG. 7, FIG. 7 is a manufacturing method of a coil body 100 according to the embodiment of the present application, which includes:

S71: fixing the yoke, the first terminal and the second terminal to a position corresponding to the mold;

According to the structure of the moving iron receiver coil according to actual needs, a corresponding mold is manufactured, and the yoke, the first terminal and the second terminal are fixed at corresponding positions of the mold.

S72: Injecting plastic raw rubber based on the inner wall of the yoke and cooling and molding.

Since the plastic raw rubber is usually solid in a normal state, the plastic raw rubber needs to be processed before the plastic raw rubber is injected into the mold. Specifically, the plastic raw rubber is heated to plasticize the plastic raw rubber into a molten state, and then molten plastic raw rubber is injected into each of the mold cavities at a predetermined pressure.

Further, before injecting the plastic raw rubber into the mold, each of the molds is locked by a clamping device, and the mold is supplied with a sufficient clamping force, that is, the mold is tightened with a huge mechanical thrust to resist the entry of the molten plastic raw rubber. The cavity pressure generated by the cavity prevents the die from being slit and causes undesirable defects in the product. Specifically, the mold clamping process is completed by a mold clamping device of the injection molding machine, including a mechanical mold clamping device, a hydraulic mold clamping device, and a hydraulic mechanical mold clamping device.

After the plastic raw rubber is injected into each of the molds, each of the molds is subjected to a temperature-lowering treatment to cool the plastic raw rubber in each of the molds, and specifically, the cooling of the plastic raw rubber in the mold is cooled. The system is completed. The cooling system is mainly used to cool the oil temperature. If the oil temperature is too high, various faults will occur, so the oil temperature must be controlled. The position to be cooled is near the feed opening of the injection tube of the injection molding machine, and the lower feed opening is cooled to prevent the plastic raw rubber from melting at the discharge opening, resulting in failure to properly cut. After a period of cooling, the material has been substantially shaped.

After the cooling process is completed, the mold clamping device is released, and each of the molds is opened, and the coil body 100 is taken out, as shown in FIG. Specifically, the mold opening refers to the opening of the mold, corresponding to the mold clamping, and when the molten plastic is injected into the mold cavity and after the cooling is completed, the mold is taken out, and the product is taken out. The mold opening process is also divided into three stages. The first stage slowly opens the mold to prevent the part from tearing in the cavity. The second stage quickly opens the mold to shorten the mold opening time. The third stage slowly opens the mold to reduce the impact and vibration caused by the mold opening inertia. After the mold is opened, the finished product can be formed, that is, the integral injection molding is completed, and the coil body 100 is injection molded.

Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, and are not limited thereto; in the idea of the present application, the technical features in the above embodiments or different embodiments may also be combined. The steps may be carried out in any order, and there are many other variations of the various aspects of the present application as described above, which are not provided in the details for the sake of brevity; although the present application has been described in detail with reference to the foregoing embodiments, The skilled person should understand that the technical solutions described in the foregoing embodiments may be modified, or some of the technical features may be equivalently replaced; and the modifications or substitutions do not deviate from the embodiments of the present application. The scope of the technical solution.

Claims

A receiver coil, comprising: a coil body and a wire,

The coil body includes a skeleton, a first terminal, a second terminal, and a yoke;

The skeleton includes a first body, a wire winding portion and a second body that are sequentially connected;

The yoke is sleeved on the first body;

The wire winding portion is located between the first body and the second body,

The first terminal and the second terminal are symmetrically embedded at two ends of the second body and protrude from upper and lower surfaces of the second body;

The wire is wound around an outer surface of the wire winding portion, and two ends of the wire are respectively connected to the first terminal and the second terminal.
The coil according to claim 1, wherein the portions of the first terminal and the second terminal that protrude from the upper surface of the second body are respectively the starting end of the wire and the end of the wire. And a portion protruding from the lower surface of the second body is a positive and negative electrode of the conductive output end, respectively.
The coil according to claim 2, wherein a height of said conductive output end extending from said lower surface of said second body is greater than said initial hanging end and said ending hanging end extending said second The height of the upper surface of the body.
The coil according to claim 1, wherein said wire winding portion is two symmetrical small square columns.
The coil according to claim 1, wherein each of the intermediate portions of the first body and the second body defines a receiving cavity for arranging a vibrating piece of the armature.
The coil according to claim 1, wherein the upper and lower sides of the first body are provided with symmetrical grooves for mounting magnets, and the shape of the grooves is matched to the shape of the magnet. .
The coil according to claim 1, wherein all portions of said wires have the same wire diameter.
The coil according to claim 1, wherein the first body comprises a fixing portion, a connecting portion and a supporting portion which are sequentially connected;

The fixing portion is an annular structure connected to one end of the wire winding portion;

The yoke is sleeved on the connecting portion, and an inner wall structure of the yoke is adapted to an outer wall structure of the connecting portion.
A winding process for a receiver coil, characterized in that it comprises:

Inserting the coil body into the winding carrier;

Along the outer side of the starting hanging end, the wire is wound 4-8 turns from top to bottom at the starting hanging end;

Rotating the winding carrier at a constant speed to wind the wire around the wire winding portion, and making the wire uniform in the winding portion of the wire;

Along the outer side of the end of the hanging wire, the wire is wound 4-8 times from the bottom to the end at the end of the hanging wire end, and then the wire is cut off;

The winding carrier runs to a welding position, and the initial hanging end and the ending hanging end are respectively welded to both ends of the wire.
A method of manufacturing a coil body according to any of claims 1-8, comprising:

Fixing the yoke, the first terminal and the second terminal to a position corresponding to the mold;

The plastic raw rubber is injected on the basis of the inner wall of the yoke, and is cooled and molded.