Surface mount type variable inductor

Abstract

The utility model discloses a patch type variable inductor which comprises a base and a magnetic core, the top of the base is provided with a plane portion used for adsorption, a wrapping post inclined relative to the plane portion and staggered with the plane portion is arranged in the base, a coil is wound on the wrapping post, a threaded hole is formed in the wrapping post in the axial direction of the wrapping post, and the magnetic core is connected into the threaded hole in a threaded mode. According to the inductor, the wrapping post is obliquely arranged, so that a complete plane part can be reserved at the top of the base for adsorption of automatic surface mounting equipment, and the inductor can meet the requirement of automatic surface mounting. And the wrapping posts and the plane parts are arranged in a staggered manner, and the plane parts do not interfere with the wrapping posts and the magnetic core, so that the inductance value can still be adjusted by adjusting the position of the magnetic core after the inductor is assembled to a PCB. Therefore, the inductor can be suitable for automatic surface mounting production on the premise of ensuring that the inductance value is adjustable, so that the assembling efficiency of the inductor is improved, and the yield of surface mounting manufacturing is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of electronic components, in particular to a patch type variable inductor. Background Art

[0002] A variable inductor is an electronic component that changes the inductance value by changing the relative position between the magnetic core and the coil. Most variable inductors in the prior art have the magnetic core mounted on a base, and the magnetic core can rotate and move up and down relative to the base, thereby changing the distance between the magnetic core and the coil to change the inductance of the inductor. In order to ensure that the variable inductor can match the circuit by adjusting the position of the magnetic core after being assembled on the PCB, an open space must be reserved on the top of the base to expose the magnetic core so that tools can be used to fine-tune the position of the magnetic core. Therefore, in most variable inductors in the prior art, the top of the base cannot retain a complete plane, so that automated mounting production cannot be achieved, resulting in reduced assembly efficiency of the inductor, or even if it can be barely used for automated mounting production, the automated mounting equipment cannot reliably adsorb the base, resulting in an increase in the defective rate of patch production. Utility Model Content

[0003] In order to overcome the shortcomings of the prior art, the purpose of the utility model is to provide a chip-type variable inductor, which can be suitable for automated mounting production while ensuring that the inductance is adjustable, thereby improving the efficiency of inductor assembly and improving the yield of chip production.

[0004] In order to solve the above problems, the technical solution adopted by the utility model is as follows: a chip-type variable inductor, including a base and a magnetic core, the top of the base has a flat portion for adsorption, the base has a winding post inclined relative to the flat portion and staggered with the flat portion, a coil is wound on the winding post, the winding post is provided with a threaded hole along its axial direction, and the magnetic core is threadedly connected to the threaded hole.

[0005] Compared with the prior art, the beneficial effect of the utility model is that the winding post of the inductor is tilted, so that a complete flat portion can be retained on the top of the base for adsorption by the automatic patch equipment, so that the inductor can meet the needs of automated placement. In addition, the winding post and the flat portion are staggered, and the flat portion will not interfere with the winding post and the magnetic core, so that after the inductor is assembled to the PCB, the inductance can still be adjusted by adjusting the position of the magnetic core. Therefore, the inductor can be suitable for automated placement production while ensuring that the inductance is adjustable, thereby improving the efficiency of inductor assembly and the yield of patch production.

[0006] In the above-mentioned SMD variable inductor, both sides of the bottom of the base are provided with pin winding parts, and the pin winding parts are used to wind the pins of the coil.

[0007] In the above-mentioned SMD variable inductor, a positioning groove is provided in the base, a mounting seat is slidably connected in the positioning groove, and the winding post is fixedly connected to the mounting seat.

[0008] In the above-mentioned chip variable inductor, the winding post and the mounting seat are integrally formed.

[0009] In the above-mentioned chip variable inductor, along the sliding direction of the mounting seat, the length of the planar portion is smaller than the length of the bottom surface of the base.

[0010] In the above-mentioned chip variable inductor, an adjustment groove is provided on the outer end surface of the magnetic core.

[0011] In the above-mentioned chip variable inductor, the inclination angle of the winding post is 45°.

[0012] In the above-mentioned chip variable inductor, the base is made of phenolic resin.

[0013] The utility model is further described in detail below in conjunction with the accompanying drawings and specific implementation methods. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the overall structure of an inductor according to an embodiment of the utility model;

[0015] Figure 2 for Figure 1 An exploded view of the inductor shown;

[0016] Figure 3 A side view of an inductor according to an embodiment of the present utility model;

[0017] Figure 4 It is a front view of an inductor according to an embodiment of the utility model.

[0018] Description of the accompanying drawings: 100 base, 110 plane portion, 120 positioning groove, 130 pin winding portion, 200 magnetic core, 210 adjustment groove, 300 mounting seat, 310 winding column, 311 threaded hole, 400 coil, 410 pin. DETAILED DESCRIPTION

[0019] The embodiments of the present invention are described in detail below. Figures 1 to 4The embodiment of the utility model provides a patch type variable inductor, including a base 100 and a magnetic core 200. The top of the base 100 has a flat portion 110 for adsorption. The base 100 has a winding post 310 that is inclined relative to the flat portion 110 and staggered with the flat portion 110. A coil 400 is wound on the winding post 310. The winding post 310 has a threaded hole 311 along its axial direction. The magnetic core 200 is threadedly connected in the threaded hole 311. When the inductance of the inductor needs to be changed, the magnetic core 200 is screwed in or out along the threaded hole 311 to change the relative position between the magnetic core 200 and the coil 400. The inductor has the winding post 310 tilted, so that a complete flat portion 110 can be reserved on the top of the base 100 for adsorption by automatic patch equipment, so that the inductor can meet the needs of automated mounting. The winding post 310 and the plane part 110 are staggered, and the plane part 110 does not interfere with the winding post 310 and the magnetic core 200, so that after the inductor is assembled to the PCB, the inductance can still be adjusted by adjusting the position of the magnetic core 200. Therefore, the inductor can be suitable for automatic mounting production while ensuring that the inductance is adjustable, thereby improving the efficiency of inductor assembly and the yield rate of patch production.

[0020] Furthermore, a positioning groove 120 is provided in the base 100, a mounting seat 300 is slidably connected in the positioning groove 120, a winding post 310 is fixedly connected to the mounting seat 300, and the winding post 310 and the mounting seat 300 are integrally formed. When manufacturing the inductor, the coil 400 can be wound on the mounting seat 300 first, and then the mounting seat 300 is slidably connected to the mounting groove, and finally the mounting seat 300 is fixed to the base 100, and then the magnetic core 200 is screwed into the threaded hole 311. Furthermore, pin winding parts 130 are provided on both sides of the bottom of the base 100, and the pin winding parts 130 are used to wind the pins 410 of the coil 400. After the mounting base 300 with the wound coil 400 is slidably inserted into the mounting groove, the pins 410 of the coil 400 are wound around the pin winding parts 130. Not only can the coil 400 be fixed to the base 100, but the copper wire of the coil 400 can also be used as a terminal for assembling the inductor and the PCB circuit patch, thereby simplifying the production and mounting process of the inductor and being more environmentally friendly.

[0021] Furthermore, along the sliding direction of the mounting seat 300, the length of the plane portion 110 is less than the length of the bottom surface of the base 100. Under the premise of ensuring a sufficient patch adsorption area, the length of the plane portion 110 is slightly smaller, so that the plane portion 110 can be avoided as much as possible from interfering with the winding post 310, so that the outer end surface of the magnetic core 200 can be exposed for adjustment. Furthermore, an adjustment groove 210 is provided on the outer end surface of the magnetic core 200. The adjustment groove 210 can be in the shape of a "cross" or a "one", so as to facilitate the use of tools to be inserted into the adjustment groove 210 to adjust the position of the magnetic core 200. Furthermore, the inclination angle of the winding post 310 is 45°, which can facilitate the adjustment of the position of the magnetic core 200 after the patch inductor is assembled on the PCB. Furthermore, the base 100 is made of phenolic resin, which is more in line with the industry's environmental protection standards and international environmental protection trends.

[0022] It should be noted that in the description of the present invention, if there are any orientation descriptions, such as up, down, front, back, left, right, etc., the orientations or positional relationships indicated are all based on the orientations or positional relationships shown in the drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed or operated in a specific orientation, and cannot be understood as a limitation on the present invention.

[0023] In the description of the present utility model, "several" means one or more, "more" means two or more, "greater than", "less than", "exceed" etc. are understood to exclude the number itself, and "above", "below", "within" etc. are understood to include the number itself. If there is a description of "first" or "second", it is only used to distinguish the technical features, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0024] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, connecting, etc. should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention based on the specific content of the technical solution.

[0025] The above-mentioned implementation modes are only preferred implementation modes of the present invention, and cannot be used to limit the protection scope of the present invention. Any non-substantial changes and substitutions made by technicians in this field on the basis of the present invention shall fall within the scope of protection required by the present invention.

Claims

1. A chip variable inductor, characterized in that: The invention comprises a base (100) and a magnetic core (200), wherein the top of the base (100) is provided with a plane portion (110) for adsorption, and the base (100) is provided with a winding post (310) which is inclined relative to the plane portion (110) and arranged staggered with the plane portion (110), a coil (400) is wound on the winding post (310), a threaded hole (311) is provided on the winding post (310) along its axial direction, and the magnetic core (200) is threadedly connected in the threaded hole (311).

2. The chip variable inductor according to claim 1, characterized in that: Both sides of the bottom of the base (100) are provided with pin winding parts (130), and the pin winding parts (130) are used to wind the pins (410) of the coil (400).

3. The chip variable inductor according to claim 1, characterized in that: A positioning groove (120) is provided in the base (100), a mounting seat (300) is slidably connected in the positioning groove (120), and the winding post (310) is fixedly connected to the mounting seat (300).

4. The chip variable inductor according to claim 3, characterized in that: The winding post (310) and the mounting seat (300) are integrally formed.

5. The chip variable inductor according to claim 3, characterized in that: Along the sliding direction of the mounting seat (300), the length of the plane portion (110) is smaller than the length of the bottom surface of the base (100).

6. The chip variable inductor according to claim 1, characterized in that: An adjustment groove (210) is provided on the outer end surface of the magnetic core (200).

7. The chip variable inductor according to claim 1, characterized in that: The inclination angle of the winding pole (310) is 45°.

8. The chip variable inductor according to claim 1, characterized in that: The base (100) is made of phenolic resin.

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