A conveniently installed chip mutual inductor and production method

Abstract

The present invention discloses a chip mutual inductor which is easy to install and a production method thereof, which belongs to the technical field of electronic component manufacturing and solves the reliability and service life problems of the chip mutual inductor. The key points of the technical solution include a magnetic core, a coil winding, a retaining spring and a shell. The magnetic core is divided into two symmetrical halves, the half is in an "E" shape and the protrusion in the middle is a plug rod. The coil winding is hollow and sleeved on the plug rod. The plug rods of the two halves are respectively inserted into the hollow ends of the coil winding and closed to each other. The two sides of the half are baffles, and a gap is left between the coil winding and the baffle. The retaining spring includes a buckle edge formed by bending and a "U"-shaped enclosure part. The buckle edge is located at both ends of the enclosure part. The enclosure part extends from the gap and is buckled on the magnetic core through the buckle edge. The outer periphery of the magnetic core is fixed by tape, thereby achieving the effect of improving reliability in use and facilitating assembly and use.

Description

Technical Field

[0001] The present invention relates to the field of electronic component manufacturing, and in particular to a chip mutual inductor that is easy to install and a production method thereof. Background Art

[0002] Currently, the main structure of existing chip transformers includes a magnetic core, coil windings, and a housing. During the manufacturing process, the coil windings are assembled on the magnetic core, and then on the housing. The coil windings are divided into primary and secondary sides, with the primary side having only one turn and the secondary side having more turns. It is known that the current production process of chip transformers is inefficient. Because the coil windings or magnetic core are easily separated from the housing when they are assembled to the housing during the manufacturing process, the coil windings can affect the reliability and service life. Summary of the Invention

[0003] The purpose of the present invention is to address the shortcomings of the existing technology and at least to a certain extent solve the technical problems in the related technology, and provide a patch mutual inductor that is easy to install and a production method, which has the advantages of improving assembly production efficiency and improving product quality reliability.

[0004] In order to solve the above technical problems, the technical solution of the present invention is: a patch mutual inductor that is easy to install, including a magnetic core, a coil winding, a retaining spring, and a shell, the magnetic core is divided into two symmetrical halves, the half is "E"-shaped and the protrusion in the middle is a plug rod, the coil winding is hollow and sleeved on the plug rod, the plug rods of the two halves are respectively inserted into the hollow ends of the coil winding and closed to each other, the two sides of the half are baffles, and a gap is left between the coil winding and the baffle, the retaining spring includes a buckle edge formed by bending, and a "U"-shaped enclosure part, the buckle edge is located at both ends of the enclosure part, the enclosure part extends from the gap and is buckled onto the magnetic core through the buckle edge, the outer periphery of the magnetic core is fixed by tape, the retaining spring and the magnetic core are fixed by glue, the shell surrounds and sleeves on the outer periphery of the magnetic core and fixes the magnetic core, and the retaining spring is cross-fixed.

[0005] Preferably, the enclosure portion of the retaining spring is provided with a plurality of bending structures, and the bending structures are in even number and are symmetrical in structure on the enclosure portion.

[0006] Preferably, a test module is provided in the enclosure portion of the retaining spring, and the test module includes an insulating partition, a conductive support plate, a packaging shell, a rivet, and a thermal bimetallic strip; the packaging shell has a accommodating space, and the conductive support plate is divided into a positive portion and a negative portion, an insulating partition is placed on the conductive support plate, and the insulating partition has a through groove, the insulating partition is placed on the conductive support plate and fixed to each other, and the through groove is positioned for the conductive support plate to fix a fixed contact piece, one end of the thermal bimetallic strip is fixed to the negative portion of the conductive support plate by a rivet, and the lower end of the thermal bimetallic strip is provided with a moving contact piece facing the fixed contact piece, and the packaging shell fixes the conductive support plate, wherein when the packaging shell is heated and the heat is conducted to the thermal bimetallic strip, the positive and negative portions of the conductive support plate are connected.

[0007] Preferably, the packaging shell is made of insulating material and is insulated from the clip and non-conductive. The conductive support plate and the packaging shell have wiring terminals, which are used for connecting conductive and insulating at the wiring ends.

[0008] Preferably, the test modules are provided in plurality and are located on both inner sides and / or the inner side of the top of the retaining spring.

[0009] Preferably, a thermally conductive insulator is provided on the packaging shell, and the thermally conductive insulator includes one or more of thermally conductive silica gel, thermally conductive insulating elastic rubber, and thermally conductive filling glue.

[0010] Preferably, a bellows airbag is provided and connected between the bimetallic strip and the conductive support plate. The bellows airbag is a sealed bellows structure and its elasticity is adjusted by the size of the inflated air pressure.

[0011] A method for producing a conveniently installed chip mutual inductor, according to the conveniently installed chip mutual inductor, is characterized in that it comprises the following steps:

[0012] Step 1: Use an automatic winding machine to wind the enameled wire, use an automatic soldering machine to solder the enameled wire, use ultrasonic cleaning, wrap the coil tape, and form a coil winding;

[0013] Step 2: Install the retaining spring and magnetic core, wrap the magnetic core with tape, and mark the points;

[0014] Step 3: Measure the inductance and use a dispensing machine to glue the retaining spring and the magnetic core.

[0015] Step 4: Bake the product;

[0016] Step 5: Verification and testing, including appearance inspection, turn-to-turn test, voltage test, comprehensive test, projection inspection, and full appearance inspection.

[0017] A method for producing a chip mutual inductor that is easy to install. The chip mutual inductor that is easy to install is characterized in that after the test module is installed, a test wire is passed through, and the coil winding is connected to the pin. When the pin is powered on for testing, the operating temperature is transferred to the test module by heat conduction. An external temperature detector is set in the laboratory and the external temperature data is displayed. The test module adjusts the elastic force of the bellows airbag by the amount of gas passed into the bellows airbag. When the thermal bimetallic strip is deformed by heat and is about to enter a conductive state, the elasticity of the bellows airbag needs to be overcome. The ventilation volume or air pressure value of the bellows airbag when the test module is heated and powered on is set as needed.

[0018] Compared with the background technology, the technical effects of the present invention are mainly reflected in the following aspects:

[0019] 1. The transformer structure uses a magnetic core structure to limit the coil winding, and the retaining spring is used to limit the magnetic core, so that the upper limit value coil winding can be separated from different directions. It is further reinforced by adhesive tape and glue. This makes the assembly efficiency higher and the structural assembly is more reliable. The cross-fixing method of retaining springs improves the assembly firmness and reliability.

[0020] 2. The structure of the circlip can be used as a winding. When the client's robot arm sucks the circlip, it is also picked up by sucking the circlip, which is convenient for installation;

[0021] 3. A test module is added inside to improve the working reliability, which can respond sensitively to temperature and can also be used as a temperature control switch. When in use, after connecting the test module, if the working temperature of the transformer is abnormal, the line connection feedback signal can be sent. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 2. It is a top view of the structure of the chip mutual inductor in the embodiment;

[0023] Figure 2 This is a structural cross-sectional view of the AA surface in the embodiment;

[0024] Figure 3 A schematic diagram of the structural assembly of the iron core in the embodiment;

[0025] Figure 4 It is a structural diagram of the test module;

[0026] Figure 5 It is a structural diagram of the bellows airbag;

[0027] Figure 6 Schematic diagram of the temperature threshold control principle.

[0028] Figure numerals: 1. magnetic core; 11. half body; 12. plug rod; 13. baffle; 2. coil winding; 3. retaining spring; 31. snap edge; 32. bending structure; 33. enclosure; 4. shell; 5. test module; 51. insulating partition; 511. through slot; 52. conductive support plate; 521. positive electrode; 522. negative electrode; 523. fixed contact; 53. packaging shell; 531. thermal insulator; 54. rivet; 55. thermal bimetallic strip; 551. moving contact; 56. bellows airbag; 6. pin. DETAILED DESCRIPTION

[0029] The specific embodiments of the present invention are further described below in conjunction with the accompanying drawings to make the technical solutions of the present invention easier to understand and grasp.

[0030] Example 1:

[0031] A conveniently installed chip mutual inductor includes a magnetic core 1, a coil winding 2, a spring clip 3, and a housing 4. The coil winding 2 is an enameled wire winding structure. The two ends of the spring clip 3 are polished so that they can be welded. The spring clip 3 can be used as a conductor as a coil. The overall structure is shown in Figure 1. Figure 1 shown.

[0032] refer to Figure 3 It can be seen that the magnetic core 1 is divided into two symmetrical halves 11. The half 11 is "E"-shaped and the protruding part in the middle is the plug rod 12. The coil winding 2 is hollow and is sleeved on the plug rod 12. The plug rods 12 of the two half bodies 11 are respectively inserted into the hollow ends of the coil winding 2 and closed to each other. The two sides of the half body 11 are baffles 13, and a gap is left between the coil winding 2 and the baffle 13.

[0033] refer to Figure 2 and Figure 1 Understand, in Figure 2 In the schematic cross-sectional structure, the schematic is Figure 1 The approximate cross-sectional structure at the AA position in the middle. It can be understood in conjunction with the following structural description: the retaining spring 3 includes a snap edge 31 formed by bending, and a "U"-shaped enclosure portion 33. The above-mentioned grinding of the retaining spring 3 is performed on the bottom of the snap edge 31. The snap edges 31 are located at both ends of the enclosure portion 33 and are in a snap-fitting manner, which can compress the coil winding 2. During installation, the enclosure portion 33 extends from the gap and is snapped onto the magnetic core 1 through the snap edges 31. The outer periphery of the magnetic core 1 is fixed by tape and can also be assembled on the outer shell 4. There are pins 6 on the outer shell 4, which are connected to the coil winding 2. The retaining spring 3 and the magnetic core 1 are fixed by glue dripping, and the outer shell 4 is sleeved around the outer periphery of the magnetic core 1 and fixes the magnetic core 1.

[0034] exist Figure 2As can be seen in the figure, the enclosing plate portion 33 of the clamping spring 3 is provided with a plurality of bending structures 32, which are an even number and are symmetrical on the enclosing plate portion 33. There are two bending structures 32.

[0035] Example 2:

[0036] Combine Figure 2 and Figure 4 It is understood that this embodiment is based on embodiment 1. It can be seen that a test module 5 is provided in the enclosure portion 33 of the clamping spring 3. The test module 5 includes an insulating partition 51, a conductive support plate 52, a packaging shell 53, a rivet 54, and a thermal bimetallic strip 55. The packaging shell 53 has a accommodating space, and the conductive support plate 52 is divided into a positive electrode portion 521 and a negative electrode portion 522. An insulating partition 51 is placed on the conductive support plate 52, and the insulating partition 51 has a through groove 511. The insulating partition 51 is placed on the conductive support plate 52 and fixed to each other. The through groove 511 is positioned for the conductive support plate 52 to fix a fixed contact piece 523. One end of the thermal bimetallic strip 55 is fixed to the negative electrode portion 522 of the conductive support plate 52 by a rivet 54. The lower end of the thermal bimetallic strip 55 is provided with a moving contact piece 551 facing the fixed contact piece 523. The packaging shell 53 fixes the conductive support plate 52, and when the packaging shell 53 is heated and the heat is transferred to the thermal bimetallic strip 55, the positive electrode portion 521 and the negative electrode portion 522 of the conductive support plate 52 are connected.

[0037] As we know, the thermal bimetallic strip 55 deforms under high temperatures, specifically bending in one direction, allowing the movable contact 551 to contact the fixed contact 523, thereby connecting the conductive support plate 52. During use, wires are also drawn out, not shown in the accompanying drawings. These wires are connected to external circuits. During testing, the test module 5 can be connected in series with a battery and an indicator light. If the conductive support plate 52 is connected, the indicator light will illuminate; otherwise, the indicator light will remain off, indicating a power outage.

[0038] Test module 5 can test whether the internal operating environment is at a high temperature. This mechanical structure test is very reliable and has a long service life. When detecting high current, it can be used to set the temperature threshold to prevent the temperature from exceeding the upper limit.

[0039] Specifically, the encapsulating housing 53 is made of an insulating material and is insulated from the retaining spring 3. The conductive support plate 52 and the encapsulating housing 53 have terminals for connecting to the conductors and are insulated at the ends. To improve the reliability and comprehensiveness of the sensing, multiple test modules 5 are provided, located on both inner sides and / or the inner top of the retaining spring 3. This eliminates errors in many aspects and improves the reliability of operating temperature detection.

[0040] Specific example: a thermally conductive insulator 531 is provided on the packaging shell 53, and the thermally conductive insulator 531 includes one or more of thermally conductive silica gel, thermally conductive insulating elastic rubber, and thermally conductive filling glue.

[0041] Further, in order to solve the temperature threshold control, refer to Figure 5 and Figure 6 As shown, this solution features a bellows bladder 56 connected between the bimetallic strip and the conductive support plate 52. Bellows bladder 56 is a sealed bellows structure whose elasticity is adjusted by the inflation pressure. The addition of a test module 5 improves operational reliability, providing a sensitive response to temperature and also serving as a temperature-controlled switch. When connected, test module 5 provides a line-connection feedback signal if the transformer's operating temperature is abnormal.

[0042] Example 3:

[0043] Based on Example 2, it can be seen that a production method of a patch mutual inductor that is easy to install is provided. For the patch mutual inductor that is easy to install, the test module 5 is installed and the test lead is passed through. The coil winding 2 is connected to the pin 6. When the pin 6 is powered on for testing, the working temperature is transferred to the test module 5 by heat conduction. An external temperature detector is set in the laboratory and the external temperature data is displayed. The test module 5 adjusts the elastic force of the bellows airbag 56 by the amount of gas passed into the bellows airbag 56. When the thermal bimetallic strip 55 is deformed by heat and is about to become conductive, the elasticity of the bellows airbag 56 needs to be overcome. The ventilation volume or air pressure value of the bellows airbag 56 when the test module 5 is heated and powered on is set as needed.

[0044] The transformer's structure utilizes a magnetic core 1 to position the coil winding 2, while a retaining spring 3 also acts as a retaining force, allowing the coil winding 2 to be disengaged from various directions. The coil winding 2 is then further reinforced with adhesive tape and glue. This results in highly efficient assembly and a secure, reliable structure. The retaining spring 3 acts as a winding, allowing the robot arm to pick it up by gripping it, facilitating installation.

[0045] Example 4:

[0046] A method for producing a conveniently installed chip mutual inductor, based on Embodiment 1 and Embodiment 2, and according to the conveniently installed chip mutual inductor, comprises the following steps:

[0047] Step 1: Wind the enameled wire using an automatic winding machine, solder the enameled wire using an automatic soldering machine, clean it using ultrasonic waves, and wrap the coil with adhesive tape to form a coil winding 2;

[0048] Step 2: Install the retaining spring 3 and the magnetic core 1, wrap the magnetic core 1 with tape, and mark the points;

[0049] Step 3: Measure the inductance and use a glue dispenser to fix the retaining spring 3 and the magnetic core 1;

[0050] Step 4: Bake the product;

[0051] Step 5: Verification and testing, including appearance inspection, turn-to-turn test, voltage test, comprehensive test, projection inspection, and full appearance inspection.

[0052] Of course, the above are only typical examples of the present invention. In addition, the present invention may also have many other specific implementation methods. Any technical solutions formed by equivalent replacement or equivalent transformation fall within the scope of protection required by the present invention.

Claims

1. A chip mutual inductor that is easy to install, comprising a magnetic core (1), a coil winding (2), a retaining spring (3), and a housing (4), wherein: The magnetic core (1) is divided into two symmetrical halves (11). The halves (11) are in an "E" shape and the protruding portion in the middle is a plug rod (12). The coil winding (2) is hollow and sleeved on the plug rod (12). The plug rods (12) of the two halves (11) are respectively inserted into the hollow ends of the coil winding (2) and are closed to each other. The two sides of the halves (11) are baffles (13). A gap is left between the coil winding (2) and the baffle (13). The clip (3) includes a buckle formed by bending. An edge (31) and a U-shaped enclosure portion (33), the snap edges (31) are located at both ends of the enclosure portion (33), the enclosure portion (33) extends from the interval and is snapped onto the magnetic core (1) through the snap edges (31), the outer periphery of the magnetic core (1) is fixed by an adhesive tape, the clamping spring (3) and the magnetic core (1) are fixed by glue dripping, the shell (4) surrounds and is sleeved on the outer periphery of the magnetic core (1) and fixes the magnetic core (1), and the clamping spring (3) is cross-fixed; A test module (5) is provided in the enclosure portion (33) of the clamping spring (3), and the test module (5) comprises an insulating partition (51), a conductive support plate (52), a packaging shell (53), a rivet (54), and a thermal bimetallic strip (55); the packaging shell (53) has a receiving space, the conductive support plate (52) is divided into a positive electrode portion (521) and a negative electrode portion (522), an insulating partition (51) is placed on the conductive support plate (52), the insulating partition (51) has a through slot (511), and the insulating partition (51) is placed on the conductive support plate (52). The conductive support plate (52) and the conductive support plate (52) are fixed to each other, the through slot (511) is positioned for fixing a fixed contact piece (523), one end of the thermal bimetallic strip (55) is fixed to the negative electrode portion (522) of the conductive support plate (52) by a rivet (54), and the lower end of the thermal bimetallic strip (55) is provided with a moving contact piece (551) facing the fixed contact piece (523), and the packaging shell (53) fixes the conductive support plate (52), wherein when the packaging shell (53) is heated and conducts heat to the thermal bimetallic strip (55), the positive electrode portion (521) and the negative electrode portion (522) of the conductive support plate (52) are connected.

2. The easy-to-install chip mutual inductor according to claim 1 is characterized in that: The enclosure portion (33) of the clamping spring (3) is provided with a plurality of bending structures (32), wherein the bending structures (32) are in even number and are symmetrical in structure on the enclosure portion (33).

3. The easy-to-install chip mutual inductor according to claim 2 is characterized in that: The packaging shell (53) is made of insulating material and is insulated from the clip (3) and non-conductive. The conductive support plate (52) and the packaging shell (53) have wiring terminals, which are used for connecting conductive wires and are insulated at the wiring ends.

4. The chip mutual inductor that is easy to install according to claim 3 is characterized in that: The test modules (5) are provided in plurality and are located on both inner sides and / or the inner side of the top of the clamping spring (3).

5. The easy-to-install chip mutual inductor according to claim 2, characterized in that: A heat-conducting insulator (531) is provided on the packaging shell (53), and the heat-conducting insulator (531) comprises one or more of heat-conducting silica gel, heat-conducting insulating elastic rubber, and heat-conducting filling glue.

6. The easy-to-install chip mutual inductor according to claim 2, characterized in that: A bellows airbag (56) is provided and connected between the bimetallic strip and the conductive support plate (52). The bellows airbag (56) is a sealed bellows structure and its elasticity is adjusted by the size of the inflated air pressure.

7. A method for producing a conveniently installed chip mutual inductor, according to any one of claims 1 to 6, characterized in that: The steps include: Step 1: Winding the enameled wire with an automatic winding machine, soldering the enameled wire with an automatic soldering machine, ultrasonic cleaning, and wrapping the coil with a coil tape to form a coil winding (2); Step 2: Install the retaining spring (3) and the magnetic core (1), wrap the magnetic core (1) with tape, and mark the points; Step 3: Measure the inductance and fix the retaining spring (3) and the magnetic core (1) by dispensing glue with a dispensing machine; Step 4: Bake the product; Step 5: Verification and testing, including appearance inspection, turn-to-turn test, voltage test, comprehensive test, projection inspection, and full appearance inspection.

8. A method for producing a chip mutual inductor that is easy to install, the chip mutual inductor that is easy to install according to claim 6, characterized in that: After the test module (5) is installed, a test lead is passed through the coil winding (2) and connected to the pin (6). When the pin (6) is energized for testing, the operating temperature is transferred to the test module (5) by heat conduction. An external temperature detector is set in the laboratory and displays external temperature data. The test module (5) adjusts the elastic force of the bellows airbag (56) by the amount of gas passed into the bellows airbag (56). When the thermal bimetallic strip (55) is deformed by heat and is about to enter a conducting state, it needs to overcome the elasticity of the bellows airbag (56). The ventilation volume or air pressure value of the bellows airbag (56) in the heated and energized state of the test module (5) is set as needed.

Images