Flat coil PFC inductor convenient to assemble

Abstract

The utility model belongs to the technical field of PFC (power factor correction) inductors, and particularly relates to a flat coil PFC inductor convenient to assemble, which comprises a square magnetic core, flat coils with the same spiral direction are symmetrically connected in series on the left side and the right side of the square magnetic core, and the bottom of the square magnetic core is connected with an insulating base. A plurality of pin headers are vertically and downwards arranged at the bottom of the insulating base corresponding to the number of end points of the flat coil, vertical slots are formed in the upper sides of the pin headers, the two ends of the flat coil are attached to and connected in series with the vertical slots respectively, a plurality of gluing grooves are formed in the joint, attached to the square-frame-shaped magnetic core, of the insulating base, and the gluing grooves are connected with the square-frame-shaped magnetic core. And the gluing groove is filled with an insulating adhesive layer. According to the utility model, a worker can quickly and stably complete electric connection between the contact pin and the end point of the flat coil by utilizing the design of the vertical slot, and the design of the gluing groove is convenient for the worker to quickly position the gluing position, so that the winding is prevented from being loosened due to leakage of gluing, and the connection stability of each part is ensured.

Description

TECHNICAL FIELD

[0001] The utility model relates to PFC inductance technical field, more particularly to the flat coil PFC inductance convenient to assemble. BACKGROUND

[0002] PFC is the abbreviation of English "Power Factor Correction", which is translated as "power factor correction". It refers to adjusting through circuit structure, generally improving the power factor in the circuit, reducing the reactive power in the circuit, and improving the power conversion effect. In simple terms, it can save more electricity after using PFC circuit.

[0003] PFC circuit improves power factor often uses PFC inductance. For example, in the patent file with the patent number CN202321641539.6 and the name "new PFC inductance structure", the disclosed PFC inductance includes an integrally processed terminal base, which is L-shaped and includes a terminal part connected with the plug-in terminal, and a base part connected with the coil; the plug-in terminal is L-shaped and includes a terminal body, a bending part arranged on the upper part of the terminal body, a limiting part arranged in the middle part of the terminal body, and a clamping jaw part arranged at the bottom of the body; the terminal part is T-shaped and includes a support part connected with the base part, and plug-in parts located on both sides of the top of the support part; the coil is fixed on the arc surface of the base part by the fixing glue.

[0004] The above-mentioned PFC inductance has a ring-shaped magnetic core, which is manually wound along the magnetic core during winding. It has high requirements for the coil, and cannot use aluminum enameled wire with low strength. Therefore, most of them are made of copper wire and manually wound, and the product quality and production speed are greatly affected by human factors such as worker's technical proficiency. In addition, the existing single PFC inductance is mostly used in single parallel or single series mode (such as the above-mentioned patent file which is single series), and cannot select series or parallel working mode as needed. UTILITY MODEL CONTENTS

[0005] In view of the problems that the general PFC inductance is manually wound along the magnetic core during winding, the product quality and production speed are greatly affected by human factors such as worker's technical proficiency, the assembly speed is difficult to improve, and the existing single PFC inductance is mostly used in single parallel or single series mode, and cannot select series or parallel working mode as needed, a flat coil PFC inductance convenient to assemble is provided.

[0006] The utility model provides a flat coil PFC inductance of easy assembly, including the square frame core, the same spiral direction flat coil is connected in series to the left and right sides of square frame core, the bottom of square frame core is connected with insulating base, the bottom of insulating base is provided with a plurality of row pin vertically downward with the end point number of flat coil, the upside of row pin is provided with vertical slot, the both ends of flat coil respectively fit in a vertical slot, a plurality of glue grooves are seted up in the insulating base and the square frame core is fited and connected, and the glue groove is filled with insulating adhesive layer.

[0007] Further, the insulating base is provided with a clamping groove, a plurality of glue grooves are arranged on the clamping groove, and the square frame core is fixedly sleeved in the clamping groove.

[0008] Further, the square frame core is horizontally transversely installed in the clamping groove, and the clamping groove is provided with a clamping block corresponding to the gap between the left and right flat coils.

[0009] Further, a through guide groove is formed in the insulating base corresponding to the side of the row pin, and the both ends of the flat coil pass through the through guide groove to connect the vertical slot.

[0010] Further, the bottom of the square frame core is vertically sleeved in the clamping groove, and a back plate is vertically arranged at the back of the square frame core.

[0011] Further, the outer side of the back plate and the front end of the insulating base are provided with guide grooves, and the both ends of the flat coil are connected to the vertical slot through the guide grooves.

[0012] Further, the bottom of the insulating base is provided with a plurality of vertical sleeves, the top of the row pin is sleeved in the vertical sleeve, and the vertical slot is arranged on the row pin below the vertical sleeve.

[0013] Further, the end point of the flat coil passes through the vertical slot and is wound on the vertical slot, and the outer side of the end point of the flat coil is wrapped with a solder layer.

[0014] Further, the vertical projection area of the insulating base is greater than the vertical projection area of the square frame core with the flat coil installed.

[0015] The utility model has the advantages that:

[0016] 1. The flat coil can improve the inductance performance with the same number of turns, and there is no need for manual winding and calculation of turns during assembly, which is beneficial to improve the production assembly speed and product consistency.

[0017] 2. The vertical slot is arranged on the row pin, and the worker can quickly and stably complete the electrical connection between the row pin and the end point of the flat coil.

[0018] 3、The insulating base is provided with a glue injection groove for positioning, which is convenient for workers to quickly find the appropriate glue injection position and is conducive to automatic matching, thereby avoiding the problem of winding loosening caused by missed glue injection.

[0019] 4、The structure is simple, the assembly steps are few, and the operation and production are convenient. BRIEF DESCRIPTION OF DRAWINGS

[0020] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings needed to be used in the following embodiment or prior art description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can also be obtained by those skilled in the art without creative labor on the basis of these drawings.

[0021] Fig. 1 Structure diagram of the flat coil PFC inductor for convenient assembly;

[0022] Fig. 2 Structure diagram of the rear side of the flat coil PFC inductor for convenient assembly;

[0023] Fig. 3 Exploded structure diagram of the flat coil PFC inductor for convenient assembly;

[0024] Fig. 4 Structure diagram of another embodiment;

[0025] Fig. 5 Structure diagram of the rear side of another embodiment;

[0026] Fig. 6 Exploded structure diagram of another embodiment.

[0027] IDENTIFICATION OF DRAWINGS

[0028] 1, square magnetic core; 2, flat coil; 3, insulating base; 301, glue injection groove; 302, clamping groove; 303, clamping block; 304, vertical sleeve; 305, anti-inclination back plate; 4, pin array; 401, vertical slot; 5, through guide groove; 6, guide groove. DETAILED DESCRIPTION

[0029] Since the general PFC inductor is manually wound along the magnetic core during winding, the product quality and production speed are greatly affected by human factors such as worker skill level, the assembly speed is difficult to improve, and the existing single PFC inductor is mostly used in single parallel or single series during use, which cannot select series or parallel working mode as needed. The flat coil PFC inductor for convenient assembly is provided.

[0030] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme in the embodiments of the utility model will be described clearly and completely in combination with the drawings in the embodiments of the utility model below. Obviously, the described embodiments are part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by the ordinary skilled in the art without making creative labor belong to the scope of protection of the utility model.

[0031] It is to be explained that the terms such as "inner", "middle" and "one" cited in the specification are only for the convenience of clear description, and are not used to limit the scope of the utility model that can be implemented, and the change or adjustment of the relative relationship is also regarded as the scope of the utility model that can be implemented without substantial change of technical content, and it is stated in advance.

[0032] In the description of the utility model, it is to be understood that the orientation or position relationship indicated by the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal" and the like is the orientation or position relationship shown based on the drawings, and is only for the convenience of describing the utility model and simplifying the description, and is not indicative or suggestive of the device or element indicated must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the utility model. In addition, the terms "first", "second" and the like are only for the purpose of description, and cannot be understood as indicative or suggestive of relative importance or implicitly indicate the number of the indicated technical features. Therefore, the features limited by "first", "second" and the like can explicitly or implicitly include one or more of the features. In the description of the utility model, it is to be explained that, unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connection" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be directly connected, or indirectly connected through an intermediate medium, or the communication between two elements inside. For the ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood through specific circumstances. Embodiment one

[0033] As Figs. 1 to 3As shown, the embodiment provides a flat coil PFC inductor which is easy to assemble, including a square frame-shaped magnetic core 1, flat coils 2 with the same spiral direction are symmetrically connected in series on the left and right sides of the square frame-shaped magnetic core 1, an insulating base 3 is connected to the bottom of the square frame-shaped magnetic core 1, a plurality of row pins 4 are vertically arranged on the bottom of the insulating base 3 corresponding to the number of end points of the flat coils 2, vertical slots 401 are arranged on the upper side of the row pins 4, the two ends of the flat coils 2 are respectively fitted into a vertical slot 401, a plurality of glue injection grooves 301 are arranged on the insulating base 3 at the fitting connection position of the square frame-shaped magnetic core 1, and an insulating adhesive layer (not marked in the figure) is filled in the glue injection grooves 301.

[0034] During the production of the inductor, the flat coils 2 with corresponding number of turns are prepared in batches according to the design requirements, and then the flat coils 2 are connected into the square frame-shaped magnetic core 1, and then the insulating adhesive layer is filled in the glue injection grooves 301, and the square frame-shaped magnetic core 1 is pasted on the insulating base 3 through the insulating adhesive layer, and finally the two ends of the flat coils 2 are connected into the vertical slots 401 for electrical connection, so that the assembly process is completed. In the embodiment, since there are two flat coils 2, a total of four row pins 4 are arranged. Since the butt joint position of the row pins 4 and the end points of the flat coils 2 is fixed as the vertical slot 401, and the glue injection position is fixed as the glue injection groove 301, the randomness of the butt joint position of the components can be effectively reduced, the assembly speed is improved, and the product quality consistency is improved.

[0035] The insulating base 3 is provided with a clamping groove 302, a plurality of glue injection grooves 301 are arranged on the clamping groove 302, the square frame-shaped magnetic core 1 is horizontally installed in the clamping groove 302, and a clamping block 303 is arranged in the middle of the clamping groove 302 corresponding to the gap between the left and right flat coils 2. The flatly installed magnetic core winding is convenient to install on the equipment with low height, and the clamping block 303 can clamp the magnetic core winding, further improving the installation stability.

[0036] A through guide groove 5 is arranged on the side of the insulating base 3 corresponding to the row pin 4, and the two ends of the flat coil 2 pass through the through guide groove 5 to connect the vertical slot 401. The through guide groove 5 can provide guidance and protection for the end points of the flat coil 2, avoiding the need for the end points of the flat coil 2 to bypass the insulating base 3 from the outside to butt joint with the row pin 4.

[0037] A plurality of vertical sleeves 304 are arranged on the bottom of the insulating base 3, the top of the row pin 4 is sleeved in the vertical sleeve 304, and the vertical slot 401 is arranged on the row pin 4 below the vertical sleeve 304. The vertical sleeve 304 can effectively fix the row pin 4, avoid loosening under stress, and improve the structural stability.

[0038] It is worth mentioning that the adhesive groove 301, the locking groove 302, the locking protrusion 303, and the vertical sleeve 304 on the insulating base 3 can be integrally injection molded to improve structural consistency and simplify the component manufacturing process.

[0039] The end of the flat coil 2 passes through the vertical slot 401 and is wound around the vertical slot 401. The outer side of the point where the end of the flat coil 2 fits into the vertical slot 401 is covered with a solder layer (not shown in the figure). The winding and soldering design ensures a stable electrical connection.

[0040] The vertical projected area of ​​the insulating base 3 is larger than the vertical projected area of ​​the square magnetic core 1 on which the flat coil 2 is mounted. The larger insulating base 3 can effectively separate the winding from the circuit board, avoiding faults such as leakage caused by contact between the winding and the circuit board. Example 2

[0041] like Figs. 4 to 6 As shown, the difference between this embodiment and Embodiment 1 is that the bottom of the rectangular magnetic core 1 is vertically fitted into the locking groove 302, and an anti-tilting back plate 305 is vertically arranged behind the rectangular magnetic core 1. This vertically arranged magnetic core winding configuration is suitable for products with a small horizontal area but a large vertical space. Therefore, when assembling the circuit board, the flat winding of Embodiment 1 or the vertical winding of Embodiment 2 can be selected as needed, depending on the area of ​​the circuit board.

[0042] The outer side of the anti-tilt back plate 305 and the front end of the insulating base 3 are both provided with guide grooves 6. The two ends of the flat coil 2 are connected to the vertical slot 401 through the guide grooves 6. The guide grooves 6 have a similar function to the through guide grooves 5, which can improve the guiding and protective effect on the end points of the flat coil 2 and facilitate the connection of the end points of the flat coil 2 to the pin header 4.

[0043] The above description is a further detailed explanation of the present utility model in conjunction with specific preferred embodiments. It should not be assumed that the specific implementation of the present utility model is limited to these descriptions. All equivalent changes and modifications made within the scope of this application should still fall within the scope of the present utility model.

Claims

1. A flat coil PFC inductor for ease of assembly, characterized in that, Including the square frame magnetic core, the same spiral direction flat coil is symmetrically connected in series on the left and right sides of the square frame magnetic core, the insulating base is connected to the bottom of the square frame magnetic core, a plurality of row pins are vertically arranged on the bottom of the insulating base corresponding to the number of end points of the flat coil, the upper side of the row pin is provided with a vertical slot, the two ends of the flat coil are respectively fitted into a vertical slot, a plurality of glue grooves are arranged on the insulating base corresponding to the connection position of the square frame magnetic core, and the glue grooves are filled with an insulating adhesive layer.

2. The flat coil PFC inductor of claim 1, wherein, The insulating base is provided with a clamping groove, a plurality of glue grooves are arranged on the clamping groove, and the square frame magnetic core is sleeved in the clamping groove.

3. The flat coil PFC inductor of claim 2, wherein, The square frame magnetic core is horizontally installed in the clamping groove, and the clamping groove is provided with a clamping block corresponding to the gap between the flat coils on the left and right sides.

4. The flat coil PFC inductor of claim 3, wherein, The insulating base is provided with a through guide groove corresponding to the side of the row pin, and the two ends of the flat coil are connected to the vertical slot through the through guide groove.

5. The flat coil PFC inductor of claim 2, wherein, The bottom of the square frame magnetic core is vertically sleeved in the clamping groove, and the back of the square frame magnetic core is vertically provided with an anti-inclination back plate.

6. The flat coil PFC inductor of claim 5, wherein, The outer side of the anti-inclination back plate and the front end of the insulating base are provided with guide grooves, and the two ends of the flat coil are connected to the vertical slot through the guide grooves.

7. The flat coil PFC inductor of claim 1, wherein, The bottom of the insulating base is provided with a plurality of vertical sleeves, the top of the row pin is sleeved in the vertical sleeve, and the vertical slot is arranged on the row pin below the vertical sleeve.

8. The flat coil PFC inductor of claim 1, wherein, The end point of the flat coil passes through the vertical slot and is wound on the vertical slot, and the outer side of the end point of the flat coil is wrapped with a solder layer.

9. The flat coil PFC inductor of claim 1, wherein, The vertical projection area of the insulating base is greater than the vertical projection area of the square frame magnetic core with the flat coil installed.

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