CN216248150U

CN216248150U - Single-ended contact resistance test pen

Info

Publication number: CN216248150U
Application number: CN202122878283.8U
Authority: CN
Inventors: 张冠男
Original assignee: Sichuan Yonggui Science and Technology Co Ltd
Current assignee: Sichuan Yonggui Science and Technology Co Ltd
Priority date: 2021-11-23
Filing date: 2021-11-23
Publication date: 2022-04-08
Anticipated expiration: 2031-11-23

Abstract

The utility model discloses a single-ended contact resistance test pen which comprises a pen point and a pen body which are separated from each other, wherein the pen point comprises a first conductor and a second conductor which is coaxially and floatingly arranged in the first conductor, an insulator is arranged between the second conductor and the first conductor, the pen body is axially connected with the pen point through a connecting structure, and the first conductor and the second conductor of the connected pen point are respectively in contact connection with a contact end arranged in the pen body. The pen point and the pen body of the test pen can be separated, so that the test can be finished only by replacing the pen point when jacks with different impedances are tested, a floating design mode can be adopted to ensure good contact between the probe and a tested piece when the jacks are plugged, and the pen point is prevented from being damaged by rigid contact.

Description

Single-ended contact resistance test pen

Technical Field

The utility model relates to the field of electrical appliance measurement, in particular to a single-ended contact resistance test pen for measurement in a connector.

Background

The electric connector not only transfers current and signals, but also has good contact, reliable work and convenient maintenance, thus being widely applied to the fields of aviation, aerospace, national defense, high-speed rail, 5G network communication and the like. The contact resistance is an important index for examining the electric connector, and therefore, the contact resistance becomes one of the electric connector overhauling items on some equipment. At present, a common maintenance method is to detach a connector with a wire harness from the whole device, detach a connector housing, and measure a contact resistance between a female terminal of a contact piece and a male terminal of the contact piece. After the inspection, the connector is reassembled, and the connector is assembled on equipment to complete maintenance.

Patent CN108152539A and patent CN110133372A improve the optimization to current detection mode, have realized single-ended measurement, can carry out contact resistance's measurement under the condition that need not dismantle the jack.

SUMMERY OF THE UTILITY MODEL

The utility model aims to improve the prior art, and can realize the separation of the test contact end and the rear end on the basis of realizing single-end test and improve the test accuracy.

In order to realize the scheme, the utility model adopts the following technical scheme:

the utility model provides a single-ended contact resistance test pen, includes looks mutual separation's nib and body, the nib includes first conductor and coaxial floating set up the second conductor in first conductor, is provided with the insulator between second conductor and the first conductor, the body passes through connection structure axial with the nib and is connected, and the first conductor and the second conductor of connecting the back nib are connected with the contact jaw contact that sets up in the body respectively.

In the above technical solution, the insulator includes a first insulator and a second insulator that are sequentially arranged in the axial direction, a first cavity is arranged between the first insulator axially inward and the end face of the second insulator, and the second conductor is axially arranged in the first insulator and the second insulator.

In the above technical solution, an elastic member is disposed in the first cavity, and the elastic member is annularly sleeved on the second conductor.

In the above technical solution, the second insulator is provided with a through hole, one end of the second conductor is disposed in the through hole of the second insulator, and the second conductor can slide in the through hole.

In the above technical solution, the contact end includes a first contact body for contacting with the first conductor and a second contact body for contacting with the second conductor, the second contact body is coaxially disposed in the first contact body, and a third insulator is disposed between the first contact body and the second contact body, and the first contact body and the second contact body are respectively connected with a wire.

In the above technical solution, a second cavity with two through ends is provided in the third insulator, the second contact body is coaxially disposed in the second cavity, and the elastic member is sleeved on the second contact body.

In the above technical solution, the second contact body is movable along the second cavity axis under the action of the elastic member.

In the above technical solution, the contact end and the second conductor are axially slidably inserted.

In the above technical solution, a connection hole is provided along the axial direction of the second conductor on the end surface of the second conductor opposite to the second contact body, and one end of the second contact body extends into the connection hole.

In the above technical solution, a crown spring is provided in the connection hole, and one end of the second contact body is inserted into the crown spring.

In the above technical solution, the contact end includes a first contact body for contacting with the first conductor, and a third insulator coaxially disposed in the first contact body, a second cavity having two ends penetrating through is disposed in the third insulator, and the second conductor and the second cavity are axially symmetrically disposed.

In the above technical solution, the second conductor is connected with a wire, and the wire passes through the second cavity.

In the above technical scheme, the pen body comprises a shell, and the outer wall of the first conductor is axially connected with the inner wall of the shell through threads.

In the above technical scheme, the pen body includes the casing, and shells inner wall is provided with a plurality of recesses along the axial, be provided with the bellying on the first conductor outer wall, bellying and sliding connection.

In the above technical solution, the pen body includes a housing, an end portion of the first conductor is inserted between the first contact and the housing, and the first conductor and the first contact are connected through the metal elastic body.

In the above technical solution, an insulating elastic body is disposed between an outer wall of the first conductor and an inner wall of the housing.

In the above technical solution, the end of the first conductor is inserted between the metal elastic body and the insulating elastic body, and the metal elastic body is annularly sleeved on the outer surface of the first contact body.

In summary, due to the adoption of the technical scheme, the utility model has the beneficial effects that:

the nib and the body of a pen of test pen can separate to only need carry out the change of nib and can accomplish the test when the test has the jack of different impedances, adopt floating design can ensure when pulling out and inserting the good contact of probe and tested piece, avoid rigid contact to damage the nib.

Drawings

The utility model will now be described, by way of example, with reference to the accompanying drawings, in which:

FIG. 1 is a schematic structural view of a first pen tip;

FIG. 2 is a schematic view of the pen body of FIG. 1;

FIG. 3 is a schematic view of the structure of the combination of FIGS. 1 and 2;

FIG. 4 is a schematic structural view of a second pen tip;

FIG. 5 is a schematic view of the pen body structure of FIG. 4;

FIG. 6 is a schematic view of a third nib;

FIG. 7 is a schematic view of the pen body structure of FIG. 4;

FIG. 8 is a snap-fit connection structure of the pen body and the pen head;

wherein: 1 is a second conductor, 1-1 is a connection hole, 1-2 is a crown spring, 2 is a first conductor, 2-1 is a groove, 3 is a first insulator, 4 is a spring, 5 is a second insulator, 6 is a second contact, 7 is a first contact, 7-1 is a metal elastic body, 8 is a third insulator, 9 is a wire, 10 is a case, and 10-1 is an insulating elastic body.

Detailed Description

All of the features disclosed in this specification, or all of the steps in any method or process so disclosed, may be combined in any combination, except combinations of features and/or steps that are mutually exclusive.

Any feature disclosed in this specification (including any accompanying claims, abstract and drawings), may be replaced by alternative features serving equivalent or similar purposes, unless expressly stated otherwise. That is, unless expressly stated otherwise, each feature is only an example of a generic series of equivalent or similar features.

Example one

Fig. 1, 2, and 3 are schematic structural diagrams of an embodiment, where fig. 1 is a schematic structural diagram of a pen nib, and includes a first conductor 2 as a housing and a second conductor 1 disposed in the first conductor 2, the first conductor 2 penetrates along two ends of an axis to form a cavity therein, and the second conductor 1 is disposed in the cavity. An insulator is arranged between the second conductor 1 and the first conductor 2, the insulator sequentially comprises a first insulator 3 and a second insulator 5 along the axial direction, the second insulator 5 is arranged on the end face of the first insulator 3 and forms a first cavity with a cavity in the first insulator 3, a spring 4 is arranged in the first cavity, the spring 4 is sleeved on the second conductor 1, a through hole is arranged on the second insulator 5 along the axial line, and one end of the second conductor 1 penetrates through the through hole in the second insulator 5. On the whole pen head, the second insulator 5 and the first insulator 3 are fixedly connected with the first conductor 2 in a fixed connection mode, and the second conductor 1 is arranged in the insulator in a floating mode through the spring 4.

As shown in fig. 2, the pen body has a through hole with two ends penetrating along the axial direction, an internal thread is arranged in one end of the pen body and connected with the first conductor 2 of the pen head in a threaded connection mode, and a contact end for electrically contacting with the end of the pen head is arranged in the pen body. The contact end comprises an annular first contact body 7, a third insulator 8 is sleeved in the first contact body 7 in a surrounding mode, a second cavity with two through ends is arranged in the third insulator 8, a second contact body 6 and a spring sleeved on the second contact body 6 are arranged in the second cavity. The second contact body 6 can be axially floating by the definition of the second cavity and the spring. The first contact 7 and the second contact 7 are respectively connected with a lead 9 which penetrates out of the other end of the pen body.

As shown in figure 3, after the pen head and the pen body are connected through threads, the first conductor 2 is communicated with the first contact, and the second conductor 1 is communicated with the second contact 6 and is isolated from each other through an insulator. When the test is carried out, the tip part of the second conductor 1 of the pen point is directly inserted into the lower end in the jack, and the first conductor 2 is contacted with the edge of the jack, so that a complete power path is formed between the bottom of the jack and the edge of the end part, and the test is realized.

In the embodiment, no matter the pen head part or the pen body part, the second conductor 1 and the second contact body 6 which are butted with each other are floated by the spring, so that when the contact piece receives rigid contact force, the contact part has shrinkage allowance, and poor contact caused by acting force can be avoided.

Example two

On the basis of the first embodiment, as shown in fig. 4 and 5, the contact end of the pen body and the pen point is changed. The second contact 6 is removed from the contact end of the body and the lead wire 9 connected to the second contact 6 is connected directly to the second conductor 1. After the pen body is butted with the pen head, the measurement can be carried out only by contacting the first conductor 2 with the first contact 7.

EXAMPLE III

On the basis of the first embodiment, as shown in fig. 6 and 7, the contact end of the pen body and the pen point is changed. A connecting hole 1-1 is formed in the contact end of the second conductor 1 of the pen point along the axis, a crown spring 1-2 is axially arranged in the connecting hole 1-1, and one end of a second contact body 6 is inserted into the crown spring 1-2. After the pen body is in butt joint with the pen point, when the second conductor 1 is subjected to external force, the second conductor 1 enables the first contact body 6 to axially slide and be oppositely inserted in the crown spring 1-2 under the action of the spring 4, the contact surface of the opposite insertion is increased, and reliable connection is guaranteed.

In the above three embodiments, the pen point and the pen body have three axial connecting structures, and in the first embodiment and the second embodiment, as can be seen from fig. 1 to 5, a threaded connection mode is adopted, wherein an external thread is arranged on the outer wall of the first conductor 2, an internal thread is arranged on the inner wall of the housing 10, and the connection between the pen body and the pen point is completed through threaded engagement.

In the third embodiment, a connection mode of a push-pull structure is adopted between the pen point and the pen body, as shown in fig. 6, a groove 2-1 is arranged on the connection end portion of the first conductor 2, a groove is also arranged on the corresponding shell 10, an insulating elastic body 10-1 is arranged in the groove, a metal elastic body 7-1 is arranged on the connection end surface of the first contact body 7, the first conductor 2 is directly inserted between the insulating elastic body 10-1 and the metal elastic body 7-1, so that the insulating elastic body 10-1 is clamped into the groove 2-1, a pressing force is applied to the first conductor 2 through the two elastic bodies, and thus the fixing of the pen point is completed, and meanwhile, the metal elastic body 7-1 enables the first contact body 7 to be conducted with the first conductor 2. In order to fix the metal elastic body 7-1, the metal elastic body 7-1 is a spring and is sleeved on the surface of the first contact 7.

The third connection structure is a snap connection, as shown in fig. 8, a plurality of sliding grooves are axially formed in the inner wall of the casing of the pen body, corresponding protrusions are formed in the outer wall of the first conductor of the pen head, and the protrusions and the sliding grooves are matched with each other to achieve the snap connection of the pen body and the pen head.

The utility model is not limited to the foregoing embodiments. The utility model extends to any novel feature or any novel combination of features disclosed in this specification and any novel method or process steps or any novel combination of features disclosed.

Claims

1. The single-ended contact resistance test pen is characterized by comprising a pen point and a pen body which are separated from each other, wherein the pen point comprises a first conductor and a second conductor which is coaxially arranged in the first conductor in a floating mode, an insulator is arranged between the second conductor and the first conductor, the pen body is axially connected with the pen point through a connecting structure, and the first conductor and the second conductor of the connected pen point are respectively in contact connection with a contact end arranged in the pen body.

2. The single-ended contact resistance test pencil of claim 1, wherein the insulator comprises a first insulator and a second insulator axially arranged in sequence, a first cavity is arranged between an inward end face of the first insulator and an end face of the second insulator, and the second conductor is axially arranged in the first insulator and the second insulator.

3. The single-ended contact resistance test pen according to claim 2, wherein an elastic member is disposed in the first cavity, and the elastic member is annularly sleeved on the second conductor.

4. The single-ended contact resistance test pencil of claim 3, wherein the second insulator has a through hole, and the second conductor has one end disposed in the through hole of the second insulator, and is capable of sliding in the through hole.

5. A single-ended contact resistance test pen as claimed in claim 1, wherein the contact end comprises a first contact for contacting the first conductor and a second contact for contacting the second conductor, the second contact being arranged coaxially within the first contact, and a third insulator being arranged between the first and second contacts, the first and second contacts each being connected to a wire.

6. The single-ended contact resistance test pen according to claim 5, wherein the third insulator has a second cavity with two ends penetrating therethrough, the second contact is coaxially disposed in the second cavity, and the elastic member is sleeved on the second contact.

7. The single-ended contact resistance test pen according to claim 6, wherein the second contact is movable along the second cavity axis by the spring.

8. The single-ended contact resistance test pen according to claim 1 or 5, wherein the contact end and the second conductor are axially slidably inserted.

9. The single-ended contact resistance test pen according to claim 8, wherein a connecting hole is provided along the axial direction of the second conductor on an end surface of the second conductor opposite to the second contact, and one end of the second contact protrudes into the connecting hole.

10. The single-ended contact resistance test pencil of claim 9, wherein a crown spring is provided in the connection hole, and one end of the second contact body is inserted into the crown spring.

11. The single-ended contact resistance test pen according to claim 1, wherein the contact end comprises a first contact body for contacting the first conductor, a third insulator coaxially arranged in the first contact body, a second cavity with two through ends is arranged in the third insulator, and the second conductor is axially symmetrical to the second cavity.

12. The single-ended contact resistance test pencil of claim 8, wherein the second conductor is connected to a wire, the wire passing through the second cavity.

13. The single-ended contact resistance test pen according to claim 1, wherein the pen body comprises a housing, and the outer wall of the first conductor is axially connected with the inner wall of the housing through a thread.

14. The single-ended contact resistance test pen according to claim 1, wherein the pen body comprises a housing, a plurality of grooves are axially formed in an inner wall of the housing, and a protrusion is formed on an outer wall of the first conductor and is connected with the first conductor in a sliding manner.

15. The single-ended contact resistance test pen according to claim 8, wherein the pen body comprises a housing, the end of the first conductor is inserted between the first contact and the housing, and the first conductor and the first contact are connected by a metal elastomer.

16. The single-ended contact resistance test pen of claim 15, wherein an insulating elastomer is disposed between the outer wall of the first conductor and the inner wall of the housing.

17. The single-ended contact resistance test pen according to claim 15 or 16, wherein the end of the first conductor is inserted between the metal elastomer and the insulating elastomer, and the metal elastomer ring is sleeved on the outer surface of the first contact body.