Adjustable mid-chuck inductor with cheap heat dissipation
By using a brass central shaft and bellows design, the problems of electromagnetic interference and poor heat dissipation during the adjustment of intermediate frequency inductors are solved, enabling convenient multi-directional adjustment and efficient heat dissipation, and improving the adjustment accuracy and power performance of the inductor.
Patent Information
- Application Number
- CN202522080997.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-09-28
- Publication Date
- 2026-08-25
- Estimated Expiration
- 2035-09-28
AI Technical Summary
Existing intermediate frequency inductors are susceptible to electromagnetic interference from steel tools during adjustment, making adjustment inconvenient and heat dissipation poor, thus affecting adjustment accuracy and power.
Featuring a central pivot and bellows design made of brass, combined with a ring-shaped telescopic bellows and a centering hexagonal groove, it is compatible with various tools for adjustment and improves heat dissipation through the thermal conductivity of brass.
It enables convenient multi-directional adjustment, reduces electromagnetic interference, improves adjustment accuracy and heat dissipation, thereby enhancing the power performance of the intermediate frequency inductor.
Smart Images
Figure CN224682905U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of adjustable inductor technology, specifically relating to an adjustable intermediate frequency inductor. Background Technology
[0002] An intermediate frequency transformer, also called an intermediate frequency resonant coil or an intermediate frequency inductor, is a type of transformer with a fixed resonant circuit. The resonant circuit can be finely adjusted within a certain range to achieve a stable resonant frequency after being connected to the circuit. It is used in intermediate frequency amplifier circuits for impedance matching and in oscillation circuits to generate oscillation frequencies. Existing intermediate frequency transformers typically employ a knob-type inductor, comprising: a metal housing, a magnetic core, an inductor coil and adjustment mechanism, a central shaft, and a top knob. The central shaft is fitted onto the top of the metal housing in the middle, with its lower end extending into the inner cavity of the metal housing and connecting to the adjustment mechanism. The upper end connects to the top knob, and the inductance parameters are adjusted by rotating the top knob, which in turn drives the adjustment mechanism via the central shaft. In this type of structure, the top knob usually has a long, narrow groove or a cross-shaped groove. A flat or cross-shaped screwdriver can be inserted to adjust the mechanism. However, because the top knob is close to the magnetic core, there is a strict requirement that the screwdriver material be non-magnetic. Since most commonly used screwdrivers are made of steel, steel will generate electromagnetic induction when it comes into contact with the magnetic core (like in a microwave oven), interfering with the inductance adjustment parameters and affecting the adjustment accuracy. Furthermore, the long, narrow groove or cross-shaped groove of the top knob is only suitable for vertical adjustment, not horizontal or lateral adjustment, making adjustment inconvenient. The enclosed metal housing also makes it difficult to install the heat sink, affecting heat dissipation. Utility Model Content
[0003] To address the shortcomings of existing technologies, this invention provides an adjustable intermediate frequency inductor that is easy to adjust, has minimal adjustment interference, and offers good heat dissipation.
[0004] The specific solution of this utility model is as follows: an inexpensive and heat-dissipating adjustable intermediate frequency inductor, comprising: an adjustment knob, a bellows, a central rotating shaft, a metal housing, an adjustment mechanism, a magnetic core, and an inductor coil; the middle section of the central rotating shaft is sleeved on the top of the metal housing, the lower end extends into the inner cavity of the metal housing and connects to the adjustment mechanism, and the upper end is connected to the lower end of the bellows; the upper end of the bellows is connected to the bottom of the adjustment knob; the magnetic core and the inductor coil are located in the inner cavity of the metal housing, below the adjustment mechanism.
[0005] The upper side of the adjustment knob is provided with a centering hexagonal groove, the bottom of which is provided with a cross-shaped groove, and the outer edge is a flat hexagonal shape parallel to the six sides of the hexagonal groove. The bottom is connected to a corrugated pipe.
[0006] The corrugated pipe is an annular telescopic corrugated pipe made of brass; The central pivot is made of brass.
[0007] Compared with existing adjustable intermediate frequency inductors, this invention has the following advantages: This invention offers convenient adjustment: the adjustment knob has a centering hexagonal groove on its upper side, compatible with L-shaped hexagonal wrenches, which are suitable for both longitudinal and lateral adjustment; the bottom of the hexagonal groove has a cross-shaped groove, compatible with both Phillips screwdrivers and flathead screwdrivers; the outer edge is a flat hexagonal square, suitable for clamping and adjusting various workpieces such as small wrenches, tweezers, and needle-nose pliers; it has strong adaptability to operating tools; the bellows is a ring-shaped telescopic bellows, which can act as a flexible shaft, allowing rotation in a bent state (such as in a flexible shaft pipe cleaning machine), achieving eccentric adjustment and facilitating the movement of operating tools away from circuit components.
[0008] This invention features minimal interference during adjustment: The bellows in this invention is an annular telescopic bellows, which can freely extend and retract to adjust the distance between the adjustment knob and the magnetic core, significantly reducing electromagnetic induction in steel tools and effectively minimizing adjustment interference, making tool selection more convenient.
[0009] This invention has good heat dissipation: the lower end of the central rotating shaft extends into the inner cavity of the metal shell, and the upper end is connected to a bellows. The central rotating shaft and the bellows are made of brass, which takes into account both support rigidity and heat dissipation. The central rotating shaft conducts the heat of the inner cavity of the metal shell to the bellows. The bellows has a large unfolded area and acts as a heat dissipation pipe.
[0010] This invention can improve the power of intermediate frequency transformer (IF) inductors: This invention has good heat dissipation, which can increase the operating current of the IF inductor, thereby increasing the power of the IF inductor.
[0011] The utility model has strong adaptability: the corrugated pipe of the utility model can freely extend and bend (such as the drain pipe of a washing machine), which can fully give way to circuit components; the adjustment knob is highly adaptable to operating tools, and can not only be adjusted horizontally and vertically, but also eccentrically, making it easy for operating tools to give way to circuit components; effectively increasing the installation space and adjustment space of the utility model. Attached Figure Description
[0012] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 This is a top view of the present invention. Detailed Implementation
[0013] like Figure 1 , Figure 2As shown, an inexpensive and heat-dissipating adjustable intermediate frequency inductor includes: an adjustment knob 1, a bellows 2, a central shaft 3, a metal housing 4, an adjustment mechanism 5, a magnetic core 6, and an inductor coil 7; the middle section of the central shaft 3 is sleeved on the top of the metal housing 4, the lower end extends into the inner cavity of the metal housing 4 and connects to the adjustment mechanism 5, and the upper end is connected to the lower end of the bellows 2; the upper end of the bellows 2 is connected to the bottom of the adjustment knob 1; the magnetic core 6 and the inductor coil 7 are located in the inner cavity of the metal housing 4, below the adjustment mechanism 5.
[0014] The upper side of the adjustment knob 1 is provided with a centering internal hexagonal groove, the bottom of the internal hexagonal groove is provided with a cross-shaped groove, the outer edge is an external hexagonal flat square parallel to the six sides of the internal hexagonal groove, and the bottom is connected to the corrugated pipe 2.
[0015] The bellows 2 is an annular telescopic bellows made of brass; it can act as a flexible shaft and also adjust the height and angle of the adjustment knob 1.
[0016] The central rotating shaft 3 is made of brass.
Claims
1. A low-cost, thermally efficient tunable mid-chuck inductor, comprising: The device comprises an adjustment knob, a bellows, a central rotating shaft, a metal housing, an adjustment mechanism, a magnetic core, and an inductor coil. The central rotating shaft is fitted onto the top of the metal housing in the middle section, and its lower end extends into the inner cavity of the metal housing to connect with the adjustment mechanism. The magnetic core and inductor coil are located in the inner cavity of the metal housing, below the adjustment mechanism. The device is characterized in that the upper end of the central rotating shaft is connected to the lower end of the bellows, and the upper end of the bellows is connected to the bottom of the adjustment knob.
2. The tunable mid-chuck inductor of claim 1, wherein: The upper side of the adjustment knob is provided with a centering hexagonal groove, the bottom of which is provided with a cross-shaped groove, and the outer edge is an outer hexagonal flat square parallel to the six sides of the inner hexagonal groove.
3. An inexpensive heat-sinkable tunable inductance according to claim 1 or 2, characterized in that: The corrugated pipe is an annular telescopic corrugated pipe.