CN219328853U

CN219328853U - Inductance test fixture of ferrite toroidal core

Info

Publication number: CN219328853U
Application number: CN202320026912.0U
Authority: CN
Inventors: 刘娜; 吕海波; 高喜英; 张静
Original assignee: Beijing Seven Star Flight Electronic Co ltd
Current assignee: Beijing Seven Star Flight Electronic Co ltd
Priority date: 2023-01-05
Filing date: 2023-01-05
Publication date: 2023-07-11
Anticipated expiration: 2033-01-05

Abstract

The utility model relates to the technical field of inductance testing, in particular to an inductance testing tool for a ferrite toroidal core. The paired conductive plates are correspondingly and electrically connected with the input end and the output end of the measuring instrument in a one-to-one correspondence manner; the paired conductive plates are arranged on the insulating plate in a separated way; the closed loop fork is capable of electrically connecting the pair of conductive plates. The pair of conductive plates can be manually communicated through the closed loop fork, so that the inductance test tool forms a closed loop, and inductance measurement can be performed on the ferrite toroidal core. The inductance testing tool is matched with the measuring instrument, the connection and disconnection of the inductance testing tool can be manually realized through the closed loop fork, the fixture does not need to be repeatedly disassembled like a traditional measuring mode, the quick measurement of the inductance of the ferrite toroidal core can be realized, and the inductance testing tool is suitable for the inductance measurement of a large number of ferrite toroidal cores.

Description

Inductance test fixture of ferrite toroidal core

Technical Field

The utility model relates to the technical field of inductance testing, in particular to an inductance testing tool for a ferrite toroidal core.

Background

The ferrite toroidal core is a soft magnetic material, is produced by adopting a ceramic process, is easy to magnetize and demagnetize, is a magnetic material with the largest application and use amount in the electronic information and household electrical appliance industry, and is mostly used for manufacturing various inductors, so that the ferrite toroidal core has higher requirement on the consistency of inductance.

In actual production, the inductance of the ring ferrite cores produced in batch is scattered, because the ring ferrite cores are sintered in a lamination sintering mode in the sintering process, and the sintering environments of the ring ferrite cores at different heights and different positions are different, so that the inductance of the ring ferrite cores is different, and the ring ferrite cores generally require a smaller scattered range design, so that the cores need to be screened, and the inductance can be measured by using an inductance test fixture.

The existing inductance testing tool for the annular ferrite core mostly adopts an LCR measuring instrument, an enameled wire at the output end of the measuring instrument is led out and passes through a central hole of the annular ferrite core, and finally is communicated with the enameled wire at the input end of the measuring instrument to form a closed loop so as to test the inductance of the core. The enameled wire between the output end and the input end of the measuring instrument is usually provided with a clamp, and the clamp can enable the enameled wire between the output end and the input end of the measuring instrument to be detachably connected, so that testing is conducted. The measuring method needs to repeatedly disassemble the clamp, and needs a certain operation step and time, so that the testing efficiency is low, and the measuring method is not suitable for detecting the annular ferrite cores in a large batch.

Disclosure of Invention

First, the technical problem to be solved

In view of the above-mentioned shortcomings and drawbacks of the prior art, the present utility model provides an inductance testing tool for a ferrite toroidal core, which solves the technical problem of low testing efficiency of the inductance testing tool for the existing toroidal ferrite core.

(II) technical scheme

In order to achieve the above object, the inductance test fixture of the ferrite toroidal core of the present utility model includes:

the paired conductive plates are correspondingly and electrically connected with the input end and the output end of the measuring instrument in a one-to-one correspondence manner;

the insulating plates are arranged on the conductive plates in pairs in a separated mode;

a closed loop fork capable of electrically connecting the pair of conductive plates.

Optionally, the closed loop fork comprises a grip and a pair of fork legs connected to the grip; the fork feet in the pair can be connected with the conductive plates in the pair in a one-to-one correspondence.

Optionally, the prongs are provided with a bent angle to enable the prongs to pass through the ferrite toroidal core and then electrically connect with the conductive plate.

Optionally, an insulating sleeve is arranged on the holding rod.

Optionally, the conductive plate and the insulating plate are adhered by epoxy resin.

Optionally, the inductance test fixture further includes a plurality of quick-release units, and the lead wires at the input end and the output end of the measuring instrument are respectively provided with one quick-release unit, so that the measuring instrument is detachably connected with the paired conductive plates.

Optionally, the quick-release unit comprises a sleeve and a threaded rod which are in threaded connection; the sleeve is arranged on the outgoing line of the measuring instrument, and the threaded rod is arranged on the outgoing line of the conducting plate.

Optionally, the quick-release unit includes a plurality of clamping jaws; the clamping jaw is arranged on the lead-out wire of the measuring instrument; the clamping jaw clamps the outgoing line of the conducting plate.

(III) beneficial effects

The beneficial effects of the utility model are as follows: the paired conducting plates are arranged on the insulating plate, the paired conducting plates are arranged separately, and the inductance test fixture is disconnected. The pair of conductive plates can be manually communicated through the closed loop fork, so that the inductance test tool forms a closed loop, and inductance measurement can be performed on the ferrite toroidal core. The inductance testing tool is matched with the measuring instrument, the connection and disconnection of the inductance testing tool can be manually realized through the closed loop fork, the fixture does not need to be repeatedly disassembled like a traditional measuring mode, the quick measurement of the inductance of the ferrite toroidal core can be realized, and the inductance testing tool is suitable for the inductance measurement of a large number of ferrite toroidal cores.

Drawings

Fig. 1 is a schematic structural diagram of an inductance testing tool for a ferrite toroidal core of the present utility model.

[ reference numerals description ]

1: a measuring instrument; 2: a quick-dismantling unit; 3: a ferrite toroidal core; 4: a conductive plate; 5: an insulating plate; 6: a grip; 7: fork legs.

Detailed Description

The utility model will be better explained by the following detailed description of the embodiments with reference to the drawings.

It should be noted that all directional indicators (such as up, down, left, right, front, and rear … …) in the embodiments of the present utility model are merely used to explain the relative positional relationship, movement, etc. between the components in a particular posture (as shown in the drawings), and if the particular posture is changed, the directional indicator is changed accordingly.

Furthermore, descriptions such as those referred to as "first," "second," and the like, are provided for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implying an order of magnitude of the indicated technical features in the present disclosure. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present utility model, the meaning of "plurality" means at least two, for example, two, three, etc., unless specifically defined otherwise.

In the present utility model, unless specifically stated and limited otherwise, the terms "connected," "affixed," and the like are to be construed broadly, and for example, "affixed" may be a fixed connection, a removable connection, or an integral body; "coupled" may be mechanical or electrical; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.

Referring to fig. 1, the utility model provides an inductance test fixture for a ferrite toroidal core, which comprises a pair of conductive plates 4, insulating plates 5 and a closed loop fork. The paired conductive plates 4 are correspondingly and electrically connected with the input end and the output end of the measuring instrument 1 in a one-to-one correspondence manner, and the measuring instrument 1 in the embodiment adopts an LCR measuring instrument; the paired conductive plates 4 are arranged on the insulating plate 5 in a separated manner; the closed loop fork is able to electrically connect the pairs of conductive plates 4.

The paired conducting plates 4 are arranged on the insulating plate 5, the paired conducting plates 4 are arranged separately, and the inductance test fixture is disconnected. The pair of conductive plates 4 can be manually connected through the closed loop fork, so that the inductance test fixture forms a closed loop, and inductance measurement can be performed on the ferrite toroidal core 3. The inductance test tool is matched with the measuring instrument 1, the connection and disconnection of the inductance test tool can be manually realized through the closed loop fork, the fixture does not need to be repeatedly disassembled like a traditional measuring mode, the quick measurement of the inductance of the ferrite toroidal core 3 can be realized, and the inductance test tool is suitable for the inductance measurement of a large number of ferrite toroidal cores 3.

Of course, the inductance test tool of the present utility model is not limited to the inductance test of the ferrite toroidal core 3, and may be used to measure the electrical properties such as Q value and impedance, and to replace the measuring instrument 1.

Further, the closed loop fork comprises a grip lever 6 and a pair of fork legs 7 connected with the grip lever 6; the pair of prongs 7 can be connected in one-to-one correspondence with the pair of conductive plates 4. In this embodiment, holding rod 6 is Y shape setting with fork foot 7 in pairs, and fork foot 7 in pairs all is connected with holding rod 6, and the fork foot 7 in pairs can be connected with the current conducting plate 4 in pairs one-to-one, can be with fork foot 7 electrical communication in pairs, makes inductance test fixture form closed loop, and then can carry out the measurement of inductance. The fork leg 7 is an enameled wire, and one end of the fork leg, which is abutted against the conducting plate 4, is exposed; the enameled wire can bear certain deformation, so that the closed loop fork is very flexible to use, the distance between the fork legs 7 of the pair can be correspondingly adjusted according to different sizes of the ferrite toroidal core 3 to be measured, the electric connection with the conductive plate 4 is completed, the closed loop fork is simple, convenient and quick to adjust, and one closed loop fork can flexibly adapt to the measurement of the ferrite toroidal core 3 with various sizes.

Next, the prongs 7 are provided with bent angles so that the prongs 7 can pass through the ferrite toroidal core 3 to be electrically connected with the conductive plate 4. In this embodiment, the fork leg 7 is L-shaped, and one end of the fork leg 7 abutting against the conductive plate 4 is vertically disposed, so that the fork leg 7 can pass through the ferrite toroidal core 3 and then abut against the conductive plate 4, thereby effectively avoiding interference with the ferrite toroidal core 3 during closed loop fork test. The fork legs 7 are flexible and changeable in shape, and the size and length of the fork legs 7 can be set according to actual requirements.

In addition, an insulating sleeve is provided on the grip lever 6. The insulation sleeve is mainly used for insulating the user from the fork pin 7 so as to avoid the conduction of a circuit between the user and the fork pin 7 and effectively ensure the measurement accuracy of the inductance test tool. Of course, the grip lever 6 may be provided as an insulating member directly, as long as the electrical communication of the pair of fork legs 7 is ensured.

Further, the conductive plates 4 and the insulating plates 5 may be bonded by epoxy resin, or may be bonded by other non-conductive materials, such as non-conductive glue, solder, etc., so as to ensure that the paired conductive plates 4 are disconnected.

Secondly, the inductance test fixture further comprises a plurality of quick-dismantling units 2, and the quick-dismantling units 2 are arranged on the lead-out wires of the input end and the output end of the measuring instrument 1, so that the measuring instrument 1 is detachably connected with the paired conducting plates 4. The quick-dismantling unit 2 enables the inductance test tool and the measuring instrument 1 to be easily dismantled and replaced, and is convenient for measuring various electrical properties of the ferrite toroidal core 3.

In one embodiment, the quick release unit 2 comprises a sleeve and a threaded rod in threaded connection; the sleeve is arranged on the outgoing line of the measuring instrument 1, and the threaded rod is arranged on the outgoing line of the conducting plate 4. Specifically, be provided with the internal thread in the sleeve, the threaded rod can be screwed into in the sleeve, realizes dismantling the connection, connects firmly, and threaded rod and sleeve all electrically conduct, and threaded connection's mode has sufficient area of contact, can guarantee the electric conductivity between sleeve and the threaded rod.

In another embodiment, the quick release unit 2 comprises a plurality of jaws; the lead-out wire of the measuring instrument 1 is provided with a clamping jaw; the clamping jaw clamps the outgoing line of the conducting plate 4. The clamping jaw is used for clamping the outgoing line of the conducting plate 4, after the clamping jaw is opened, the outgoing line of the conducting plate 4 is wound on the clamping jaw for 4-5 circles and then clamped, and the outgoing line is clamped inside the clamping jaw, so that the communication of a circuit is realized.

When the inductance test is performed, the corresponding measuring instrument 1 is selected, and quick assembly and disassembly are realized through the quick assembly and disassembly unit 2. Then placing the ferrite toroidal core 3 on the paired conductive plates 4, manually taking the closed loop fork, enabling one fork pin 7 of the closed loop fork to penetrate through the ferrite toroidal core 3, enabling the other fork pin 7 to be positioned outside the ferrite toroidal core 3, correspondingly abutting the paired fork pins 7 with the paired conductive plates 4, forming a closed loop by a circuit, and reading the measured value displayed on the measuring instrument 1 after the instrument indication is stable. After completion the product is removed and the next ferrite toroidal core 3 is tested in the same way.

It should be understood that the above description of the specific embodiments of the present utility model is only for illustrating the technical route and features of the present utility model, and is for enabling those skilled in the art to understand the present utility model and implement it accordingly, but the present utility model is not limited to the above-described specific embodiments. All changes or modifications that come within the scope of the appended claims are intended to be embraced therein.

Claims

1. An inductance test fixture for a ferrite toroidal core, the inductance test fixture comprising:

the pair of conductive plates (4) are electrically connected with the input end and the output end of the measuring instrument (1) correspondingly in a one-to-one correspondence manner;

an insulating plate (5), wherein the paired conductive plates (4) are arranged on the insulating plate (5) in a separated manner;

-a closed loop fork capable of electrically connecting pairs of said conductive plates (4).

2. The inductance testing fixture of a ferrite toroidal core according to claim 1, characterized in that the closed loop fork comprises a grip (6) and a pair of fork legs (7) connected to the grip (6); the fork feet (7) in the pair can be connected with the conductive plates (4) in the pair in a one-to-one correspondence.

3. Inductance test fixture for ferrite toroidal cores according to claim 2, characterized in that the prongs (7) are provided with bent angles so that the prongs (7) can pass through the ferrite toroidal core (3) and then be electrically connected with the conductive plate (4).

4. Inductance testing fixture for ferrite toroidal cores according to claim 2, characterized in that the grip (6) is provided with an insulating sleeve.

5. Inductance testing fixture of ferrite toroidal core according to claim 1, characterized in that the conductive plate (4) and the insulating plate (5) are bonded by epoxy resin.

6. The inductance testing fixture of a ferrite toroidal core according to claim 1, further comprising a plurality of quick-release units (2), wherein the quick-release units (2) are provided on both the input and output leads of the measuring instrument (1) to detachably connect the measuring instrument (1) to the pair of conductive plates (4).

7. The inductance test fixture of a ferrite toroidal core according to claim 6, wherein the quick release unit (2) comprises a sleeve and a threaded rod in threaded connection; the sleeve is arranged on a lead-out wire of the measuring instrument (1), and the threaded rod is arranged on a lead-out wire of the conducting plate (4).

8. Inductance test fixture of ferrite toroidal cores according to claim 6, characterized in that said quick-release unit (2) comprises a plurality of clamping jaws; the clamping jaw is arranged on the lead-out wire of the measuring instrument (1); the clamping jaw clamps the outgoing line of the conducting plate (4).