Radio frequency impedance matching converter

Abstract

The utility model discloses a radio frequency impedance matching converter, which relates to the technical field of converters and comprises a first shell, a first cavity is arranged in the first shell, a plurality of capacitor stators which are distributed at equal intervals are fixedly connected in the first cavity, a rotating shaft is rotatably connected in the first shell, and the first shell is provided with a second cavity. A rotating shaft is fixedly connected to the first shell, a plurality of capacitor moving plates distributed at equal intervals are fixedly connected to the rotating shaft, the capacitor moving plates rotate around the central axis of the rotating shaft to a gap between every two adjacent capacitor fixed plates, a driving part for driving the rotating shaft to rotate is installed on the surface of the first shell, and a mounting base is fixedly connected to the lower portion of the first shell; each capacitor moving plate is fixedly connected to the same rotating shaft, and the position of the capacitor moving plate at the gap between the two adjacent capacitor fixed plates is changed by rotating the rotating shaft subsequently, so that the capacitance of the capacitor can be flexibly changed to match the corresponding radio frequency information.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of converter, in particular to a kind of radio frequency impedance matching converter. BACKGROUND

[0002] Radio frequency impedance matching converter is a kind of equipment for frequency radiation circuit, its main function is to realize impedance matching.In the radio frequency field, when the impedance between signal source, transmission line and load is mismatched, it will cause signal reflection, energy loss and other problems, and radio frequency impedance matching converter can adjust impedance relationship, so that signal can be transmitted from signal source to load efficiently, reduce reflection, improve energy efficiency.By connecting or parallel connecting capacitor, inductor and other components in circuit to change the impedance value of load, similarly, need to combine capacitance to make module adapt to the signal requirement of different frequency, can meet the impedance matching requirement of radio frequency system, therefore there are requirements for the number of layers of capacitor moving piece and capacitor fixed piece, the face and relative angle of capacitor moving piece and capacitor fixed piece when rotating, and the number of turns and diameter of inductor coil, this factor affects the output efficiency of converter.

[0003] The present disclosure patent application No. "CN201921602568.5" is a kind of short wave therapeutic instrument with adjustable capacitor, which discloses that "the middle aluminum sheet in the two groups of fixed aluminum sheet is provided with copper sleeve penetrated on screw rod between the upper and lower adjacent aluminum sheet, ……two groups of movable aluminum sheet, the middle aluminum sheet in each group is provided with copper sleeve penetrated on adjusting rod between the upper and lower adjacent aluminum sheet, the adjusting rod on the uppermost aluminum sheet of the upper group of movable aluminum sheet is sleeved with upper positioning sleeve, the adjusting rod below the lowermost aluminum sheet of the lower group of movable aluminum sheet is sleeved with lower positioning sleeve, and the adjusting rod between the two groups is sleeved with middle positioning sleeve"; wherein, capacitor moving piece is positioned and fixed by copper sleeve and positioning sleeve, but the fixed mode of copper sleeve is not described, and the conventional connection mode leads to angle deviation phenomenon due to loosening or centrifugal force after long time use of capacitor moving piece, thereby affecting the adjustment of capacitance. UTILITY MODEL CONTENTS

[0004] Based on this, it is necessary to provide a radio frequency impedance matching converter, which can flexibly change the capacitance to match the corresponding frequency radiation information

[0005] A radio frequency impedance matching converter, comprising a first shell, the first shell has a first cavity inside, a plurality of equally spaced capacitive fixed pieces are fixedly connected in the first cavity, a rotating shaft is rotatably connected in the first shell, a plurality of equally spaced capacitive moving pieces are fixedly connected on the rotating shaft, the capacitive moving pieces rotate around the central axis of the rotating shaft to the gap between the adjacent two capacitive fixed pieces, a driving member for driving the rotating shaft to rotate is installed on the surface of the first shell, and a mounting seat is fixedly connected below the first shell.

[0006] As a preferred place, the drive includes a hand wheel, the shaft through the first shell after one end with hand wheel connection as a whole.

[0007] As a preferred place, the drive includes a worm gear, worm and the first motor, the shaft through the first shell after one end with worm gear connection as a whole, the first motor is installed on the first shell, the first motor on the shaft is installed with the worm gear meshing worm.

[0008] As a preferred place, the capacitor moving piece and the capacitor fixed piece are both fan-shaped, and the diameter of the capacitor moving piece is smaller than that of the capacitor fixed piece.

[0009] As a preferred place, the shaft is inserted at the center of the capacitor fixed piece, and the capacitor fixed piece is rotatably connected with the shaft, a first through hole is formed in the capacitor fixed piece, a first positioning rod is inserted in the first through hole, and both ends of the first positioning rod are fixedly connected to the inner wall of the first cavity.

[0010] As a preferred place, a second through hole is formed in the capacitor fixed piece, a second positioning rod is inserted in the second through hole, and both ends of the second positioning rod are fixedly connected to the inner wall of the first cavity.

[0011] As a preferred place, a third through hole is formed in the capacitor moving piece, a third positioning rod is inserted in the third through hole, and the third positioning rod is fixedly connected with the capacitor moving piece.

[0012] As a preferred place, a first limiting rod is arranged above the capacitor fixed piece, both ends of the first limiting rod are fixedly connected to the inner wall of the first cavity, and the bottom of the first limiting rod abuts against the capacitor fixed piece.

[0013] The utility model discloses the advantages are:

[0014] Each capacitor moving piece is fixedly connected to the same shaft, and the position of the capacitor moving piece at the gap between the adjacent two capacitor fixed pieces is changed in the mode of rotating the shaft, the capacitor capacity can be flexibly changed to match the corresponding frequency information, and two kinds of drive members are designed to rotate the shaft, so that users can select according to actual needs. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 It is whole structure schematic diagram;

[0016] Figure 2 It is first shell internal structure schematic diagram;

[0017] Figure 3 It is Figure 2 It is A-A section structure schematic diagram;

[0018] Icon: 1, first housing; 101, first cavity; 2, capacitor fixed piece; 201, first via hole; 202, second via hole; 3, first positioning rod; 4, first limiting rod; 5, second positioning rod; 6, third positioning rod; 7, capacitor moving piece; 701, third via hole; 8, rotating shaft; 9, hand wheel; 10, worm gear; 11, worm; 12, first motor; 13, mounting seat. DETAILED DESCRIPTION

[0019] In order to make the above-mentioned purpose, features and advantages of the utility model more apparent, obvious and easy to understand, the specific embodiments of the utility model are described in detail below. In the following description, a large number of specific details are set forth in order to fully understand the utility model. However, the utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without departing from the connotation of the utility model, so the utility model is not limited by the specific embodiments disclosed below.

[0020] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or there can be intervening elements. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or there can be intervening elements. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only and are not intended to be the only implementation.

[0021] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which the utility model belongs. The terms used in the specification of the utility model herein are only for the purpose of describing specific embodiments and are not intended to limit the utility model. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0022] As shown in Figures 1-3 ,

[0023] As an optional embodiment,

[0024] A radio frequency impedance matching converter includes a first housing 1, the first housing 1 has a first cavity 101 inside, a plurality of equally spaced capacitor fixed pieces 2 are fixedly connected in the first cavity 101, a rotating shaft 8 is rotatably connected in the first housing 1, a plurality of equally spaced capacitor moving pieces 7 are fixedly connected on the rotating shaft 8, the capacitor moving pieces 7 rotate around the central axis of the rotating shaft 8 to the gap between the adjacent two capacitor fixed pieces 2, a driving member for driving the rotating shaft 8 to rotate is installed on the surface of the first housing 1, and a mounting seat 13 is fixedly connected below the first housing 1.

[0025] Specifically, the plurality of capacitor fixed pieces 2 are fixedly installed in the first cavity 101, and the rotating shaft 8 is inserted at the center of the plurality of capacitor fixed pieces 2, and both ends of the rotating shaft 8 are connected to the inner wall of the first cavity 101 through the bearing seat, so as to ensure that the rotating shaft 8 can rotate around its own center axis, and one capacitor moving piece 7 is arranged between every two capacitor fixed pieces 2, and each capacitor moving piece 7 is fixedly connected to the same rotating shaft 8 in sequence, and the position of the capacitor moving piece 7 at the gap between the adjacent two capacitor fixed pieces 2 is changed by rotating the rotating shaft 8, so that the capacitance can be flexibly changed to match the corresponding frequency information.

[0026] Based on the above driving member, the following two specific structures are designed:

[0027] The first kind: the driving member includes a hand wheel 9, one end of the rotating shaft 8 is connected to the hand wheel 9 as a whole after penetrating through the first shell 1, and can be manually adjusted, and subsequently only the hand wheel 9 needs to be manually rotated to drive the rotating shaft 8 to rotate in the first shell 1.

[0028] The second kind: the driving member includes a worm gear 10, a worm 11 and a first motor 12, one end of the rotating shaft 8 is connected to the worm gear 10 as a whole after penetrating through the first shell 1, and the first motor 12 is installed on the first shell 1, and the worm 11 meshing with the worm gear 10 is installed on the rotating shaft 8 of the first motor 12.

[0029] Subsequently, only the first motor 12 needs to be controlled to start and stop, the worm 11 is driven to rotate by the first motor 12, and the worm 11 and the worm gear 10 are in meshing state, and subsequently the worm 11 drives the worm gear 10 to rotate, so that the rotating shaft 8 can be rotated in the first shell 1.

[0030] Both of the above two ways can drive the rotating shaft 8 to rotate, and in the rotating process of the rotating shaft 8, the capacitor moving piece 7 is driven to rotate to the position of the gap between the adjacent two capacitor fixed pieces 2, and users can select the two driving members according to actual needs.

[0031] As shown in Figure 3 Further, the capacitor moving piece 7 and the capacitor fixed piece 2 are both fan-shaped, and the diameter of the capacitor moving piece 7 is smaller than that of the capacitor fixed piece 2, and both of the capacitor pieces are fan-shaped. Further, the rotating shaft 8 is inserted at the center of the capacitor fixed piece 2, and the capacitor fixed piece 2 is rotatably connected to the rotating shaft 8, a first through hole 201 is formed in the capacitor fixed piece 2, a first positioning rod 3 is inserted in the first through hole 201, and both ends of the first positioning rod 3 are fixedly connected to the inner wall of the first cavity 101, so as to ensure that the capacitor moving piece 7 can rotate at the gap between the adjacent two capacitor fixed pieces 2 in sequence, and the first positioning rod 3 does not hinder the rotation of the capacitor moving piece 7, and the first positioning rod 3 plays a certain supporting role for the capacitor moving piece 7.

[0032] The second through hole 202 is arranged on the capacitor fixed sheet 2, the second positioning rod 5 is inserted into the second through hole 202, two ends of the second positioning rod 5 are fixedly connected to the inner wall of the first cavity 101, and the second positioning rod 5 can further support the capacitor fixed sheet 2.

[0033] The third through hole 701 is arranged on the capacitor moving sheet 7, the third positioning rod 6 is inserted into the third through hole 701, and the third positioning rod 6 is fixedly connected to the capacitor moving sheet 7; the third positioning rod 6 is arranged and can limit the capacitor moving sheet 7 to rotate to the maximum area of the gap between two adjacent capacitor fixed sheets 2, and when the capacitor moving sheet 7 completely covers the space between the two capacitor fixed sheets 2, the third positioning rod 6 abuts against the capacitor moving sheet 7, and the third positioning rod 6 can connect a plurality of capacitor moving sheets 7 into one, so that the plurality of capacitor moving sheets 7 are kept in linkage.

[0034] The first limiting rod 4 is arranged above the capacitor fixed sheet 2, two ends of the first limiting rod 4 are fixedly connected to the inner wall of the first cavity 101, the bottom of the first limiting rod 4 abuts against the capacitor fixed sheet 2, and the first limiting rod 4 can limit the capacitor moving sheet 7 to rotate to the space between two capacitor fixed sheets 2, then to pass out from the other end and abut against the bottom of the first limiting rod 4.

[0035] The above embodiments only express several implementation manners of the utility model, the description is more specific and detailed, but it cannot be understood as the limitation of the utility model patent range. It should be pointed out that, for ordinary skilled in the art, without departing from the concept of the utility model, a number of modifications and improvements can be made, and these belong to the protection range of the utility model. Therefore, the protection range of the utility model patent should be subject to the appended claims.

Claims

1. A radio frequency impedance matching transformer characterized by, The utility model provides a kind of capacitor, including first shell (1), the first shell (1) inside has first cavity (101), a plurality of equidistant distribution capacitor fixed blades (2) are fixedly connected in the first cavity (101), rotationally connected with rotating shaft (8) in the first shell (1), a plurality of equidistant distribution capacitor moving blades (7) are fixedly connected on the rotating shaft (8), the capacitor moving blade (7) rotates to the gap between adjacent two capacitor fixed blades (2) around the central axis of the rotating shaft (8), the first shell (1) surface is equipped with driving member for driving rotating shaft (8) rotation, the first shell (1) below is fixedly connected with mounting seat (13), the capacitor moving blade (7) and capacitor fixed blade (2) are sector, and the diameter of the capacitor moving blade (7) is less than the diameter of capacitor fixed blade (2).

2. A radio frequency impedance matching transformer according to claim 1, characterised in that, The driving member includes a hand wheel (9), and one end of the rotating shaft (8) penetrates through the first shell (1) and is connected with the hand wheel (9) integrally.

3. A radio frequency impedance matching transformer according to claim 1, characterised in that, The driving member includes a worm wheel (10), a worm (11) and a first motor (12), one end of the rotating shaft (8) penetrates through the first shell (1) and is connected with the worm wheel (10) integrally, the first motor (12) is installed on the first shell (1), and the rotating shaft (8) on the first motor (12) is provided with the worm (11) engaged with the worm wheel (10).

4. A radio frequency impedance matching transformer according to claim 1, characterised in that, The rotating shaft (8) penetrates at the center of the capacitor fixed blade (2), and the capacitor fixed blade (2) is rotationally connected with the rotating shaft (8), the capacitor fixed blade (2) is provided with a first through hole (201), the first through hole (201) is penetrated by a first positioning rod (3), and both ends of the first positioning rod (3) are fixedly connected to the inner wall of the first cavity (101).

5. A radio frequency impedance matching transformer according to claim 1, characterized in that, The capacitor fixed blade (2) is provided with a second through hole (202), the second through hole (202) is penetrated by a second positioning rod (5), and both ends of the second positioning rod (5) are fixedly connected to the inner wall of the first cavity (101).

6. A radio frequency impedance matching transformer according to claim 1, characterized in that, The capacitor moving blade (7) is provided with a third through hole (701), the third through hole (701) is penetrated by a third positioning rod (6), and the third positioning rod (6) is fixedly connected with the capacitor moving blade (7).

7. A radio frequency impedance matching transformer according to claim 1, characterized in that, The capacitor fixed blade (2) is provided with a first limiting rod (4), both ends of the first limiting rod (4) are fixedly connected to the inner wall of the first cavity (101), and the bottom of the first limiting rod (4) abuts on the capacitor fixed blade (2).

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