CN218956655U

CN218956655U - Magnetic repulsion type probe

Info

Publication number: CN218956655U
Application number: CN202320178843.5U
Authority: CN
Inventors: 张赟
Original assignee: Yunyang Bafang Engineering Co ltd
Current assignee: Yunyang Bafang Engineering Co ltd
Priority date: 2023-02-10
Filing date: 2023-02-10
Publication date: 2023-05-02
Anticipated expiration: 2033-02-10

Abstract

The utility model relates to the technical field of probes, in particular to a magnetic repulsion type probe. The magnetic repulsion type probe comprises a sleeve, wherein an annular baffle plate and an axial second end opening are arranged at the axial first end of the sleeve; the probe body is inserted into the sleeve, and the head part of the probe body extends out of the inner hole of the annular baffle; the ferromagnetic connecting disc is fixed at the tail end of the probe body, and the cross section size of the ferromagnetic connecting disc is larger than that of the probe body; the first magnet is magnetically attracted to one side of the ferromagnetic connecting disc, which is far away from the probe body; the ferromagnetic cover body is fixed at the axial second end of the sleeve; and the second magnet is magnetically attracted to one side of the ferromagnetic cover body, which is close to the first magnet, and the magnetism of the second magnet is the same as that of the first magnet. Compared with the existing spring type structure, the magnetic repulsion type probe provided by the utility model has longer service life.

Description

Magnetic repulsion type probe

Technical Field

The utility model relates to the technical field of probes, in particular to a magnetic repulsion type probe.

Background

In the semiconductor industry, after the chip is processed, certain specific properties of the chip need to be tested by probes.

The existing probe comprises a sleeve, a probe body and a spring, wherein the axial first end of the sleeve is closed, the axial second end of the sleeve is open, the probe body is arranged in the sleeve, the head part of the probe body extends out of the second end of the sleeve, the spring is pressed between the probe body and the second end of the sleeve, and the elastic force of the spring is transferred to the probe body so that the probe body stretches out and draws back relative to the sleeve, so that the test is completed.

The probe structure has the advantages that the abrasion and the elastic degradation of the spring mechanism can occur along with the accumulation of the service time, the risk of poor conduction or breakage of the probe is caused, the service life of the probe structure is reduced, and the whole probe structure needs to be replaced frequently at regular intervals.

Disclosure of Invention

The utility model provides a magnetic repulsion type probe, which aims to overcome the technical defect that the service life of the probe is reduced due to the fact that a spring of an existing probe structure is easy to age.

The magnetic repulsion type probe provided by the utility model comprises:

the first axial end of the sleeve is provided with an annular baffle, and the second axial end of the sleeve is open;

the probe body is inserted into the sleeve, and the head part of the probe body extends out of the inner hole of the annular baffle;

the ferromagnetic connecting disc is fixed at the tail end of the probe body, and the cross section size of the ferromagnetic connecting disc is larger than that of the probe body;

the first magnet is magnetically attracted to one side of the ferromagnetic connecting disc, which is far away from the probe body;

the ferromagnetic cover body is fixed at the axial second end of the sleeve;

and the second magnet is magnetically attracted to one side of the ferromagnetic cover body, which is close to the first magnet, and the magnetism of the second magnet is the same as that of the first magnet.

Optionally, the first magnet and the ferromagnetic connection pad are the same in shape and size.

Optionally, the second magnet and the sleeve inner cavity have the same shape and are in clearance fit.

Optionally, the first magnet and the second magnet are both permanent magnets.

Optionally, a mounting hole is formed in the center of the ferromagnetic connecting disc, one end, away from the probe body, of the mounting hole is enlarged to form a counter bore, the ferromagnetic connecting disc is fixed to the tail end of the probe body through a bolt penetrating through the mounting hole, the head of the bolt is placed in the counter bore, and the screw rod portion is screwed in the probe body.

Optionally, the ferromagnetic cover is detachably fixed to the axial second end of the sleeve.

Optionally, the ferromagnetic cover is screwed to the axial second end of the sleeve.

Compared with the prior art, the technical scheme provided by the utility model has the following advantages:

the magnetic repulsion type probe provided by the utility model has the advantages that the probe body is telescopic relative to the sleeve through the first magnet and the second magnet which are magnetic, and the service life is longer compared with the existing spring type structure. In addition, the first magnet is fixed relative to the probe body through the ferromagnetic connecting disc fixed on the probe body, the second magnet is fixed relative to the sleeve through the ferromagnetic cover body fixed on the sleeve, the technical problem that the magnet is difficult to fix when the magnetic repulsion structure is applied to the probe is overcome, the fixation is firm, and the use requirement can be better met.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the utility model and together with the description, serve to explain the principles of the utility model.

In order to more clearly illustrate the embodiments of the utility model or the technical solutions of the prior art, the drawings which are used in the description of the embodiments or the prior art will be briefly described, and it will be obvious to a person skilled in the art that other drawings can be obtained from these drawings without inventive effort.

FIG. 1 shows a cross-sectional view of a magnetic-repulsion probe of the present utility model;

fig. 2 shows a partial enlarged view at a in fig. 1.

In the figure:

1. a sleeve; 11. an annular baffle; 2. a probe body; 3. a ferromagnetic land; 31. a central bore; 32. countersink; 4. a first magnet; 5. a ferromagnetic cover; 6. a second magnet; 7. and (5) a bolt.

Detailed Description

In order that the above objects, features and advantages of the utility model will be more clearly understood, a further description of the utility model will be made. It should be noted that, without conflict, the embodiments of the present utility model and features in the embodiments may be combined with each other.

In the description, it should be noted that the terms "first," "second," and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present utility model, but the present utility model may be practiced otherwise than as described herein; it will be apparent that the embodiments in the specification are only some, but not all, embodiments of the utility model.

The utility model or specific embodiments thereof are described in detail below with reference to the accompanying drawings.

In one embodiment, as shown in fig. 1, the magnetically repulsive probe includes a sleeve 1, a probe body 2, a ferromagnetic land 3, a first magnet 4, a ferromagnetic cover 5, and a second magnet 6.

Sleeve 1:

the sleeve 1 is provided with an annular baffle 11 at its axial first end and an axial second end which is open.

Specifically, the cross-sectional shape of the sleeve 1 is not limited, and may be circular or rectangular or polygonal or other common shape.

Specifically, the annular baffle 11 is integrally formed on the sleeve 1. Of course, as an alternative embodiment, the annular baffle 11 may also be fixed to the sleeve 1 at the time by welding or the like.

Probe body 2:

the probe body 2 is inserted into the sleeve 1 and the head protrudes from the inner bore of the annular baffle 11.

It should be noted that the probe body 2 should be fitted with the inner hole of the annular baffle 11, i.e. a small tolerance clearance fit. The reason is that: if the probe body 2 is oversized, the probe body 2 has excessive resistance to telescoping; if the size of the probe body 2 is too small, swing and shake easily occur, and the test accuracy is affected.

Ferromagnetic land 3:

the ferromagnetic connection disc 3 is fixed at the tail end of the probe body 2, and the cross-sectional dimension of the ferromagnetic connection disc 3 is larger than that of the probe body 2.

Specifically, as shown in fig. 2, a mounting hole 31 is formed in the center of the ferromagnetic connection disc 3, and one end of the mounting hole 31 away from the probe body 2 is enlarged to form a counter bore 32, the ferromagnetic connection disc 3 is fixed at the tail end of the probe body 2 by a bolt 7 penetrating through the mounting hole 31, the head of the bolt 7 is placed in the counter bore 32, and the screw portion is screwed in the probe body 2. The fixing is carried out through the bolts 7, so that the fixing is firm and the operation is convenient; and through the setting of counter bore 32, can make first magnet 4 and ferromagnetic connection pad 3 laminate completely, guarantee the magnetic attraction fastness. Of course, as an alternative embodiment, the ferromagnetic connection disc 3 may be fixed to the probe body 2 by gluing, snapping, or the like.

It will be readily appreciated that the ferromagnetic coupling disc 3 has a cross-sectional dimension greater than that of the probe body 2, with the aim of providing a limit function for the ferromagnetic coupling disc 3, cooperating with the annular baffle 11 to prevent the probe body 2 from coming completely out of the inner cavity of the sleeve 1.

It is easy to understand that the ferromagnetic connection disc 3 is a disc-shaped structure made of ferromagnetic materials such as iron, chromium, nickel, etc. In the same way, the ferromagnetic cover 5 mentioned later, i.e. the cover structure made of ferromagnetic materials such as iron, chromium, nickel, etc.

First magnet 4:

the first magnet 4 is magnetically attracted to the ferromagnetic land 3 at a side away from the probe body 2.

Specifically, the first magnet 4 is a permanent magnet, such as a neodymium iron boron magnet. The magnetism is stronger, and the service life is longer. Of course, as an alternative embodiment, the first magnet 4 may be a normal magnet such as an iron oxide magnet.

Ferromagnetic cover 5:

the ferromagnetic cover 5 is fixed at the axial second end of the sleeve 1.

Specifically, the ferromagnetic cover 5 is screwed to the axial second end of the sleeve 1. More specifically, the outer wall of the axial second end of the sleeve 1 is provided with external threads, the ferromagnetic cover body 5 is provided with adapted internal threads, and the external threads and the internal threads are matched to realize the threaded connection of the ferromagnetic cover body 5 on the sleeve 1. Of course, as an alternative embodiment, the ferromagnetic cover 5 may be detachably fixed on the sleeve 1 by a buckle, a bolt, etc., so as to facilitate disassembly, thereby facilitating replacement of the magnet or the probe body 2; the ferromagnetic cover 5 may also be fixed to the sleeve 1 by welding, gluing, or the like, in a non-removable manner.

A second magnet:

the second magnet 6 is magnetically attracted to one side of the ferromagnetic cover 5 near the first magnet 4, and the magnetism of the second magnet 6 is the same as that of the first magnet 4.

Specifically, the second magnet 6 is a permanent magnet, such as a neodymium iron boron magnet. The magnetism is stronger, and the service life is longer. Of course, as an alternative embodiment, the second magnet 6 may be a normal magnet such as an iron oxide magnet.

The magnetic repulsion type probe of the embodiment has the advantages that the probe body 2 stretches and contracts relative to the sleeve 1 through the first magnet 4 and the second magnet 6 which are magnetic, and compared with the existing spring type structure, the service life is longer. In addition, the first magnet 4 is fixed relative to the probe body 2 through the ferromagnetic connecting disc 3 fixed on the probe body 2, the second magnet 6 is fixed relative to the sleeve 1 through the ferromagnetic cover body 5 fixed on the sleeve 1, the technical problem that the magnet is difficult to fix when the magnetic repulsion structure is applied to the probe is overcome, the fixation is firm, and the use requirement can be better met.

In some embodiments, as shown in fig. 1, the first magnet 4 and the ferromagnetic coupling disc 3 are the same shape and size. The first magnet 4 can be completely attached to the ferromagnetic connection disc 3 in the cross section, so that magnetic attraction force can be ensured, and the first magnet 4 is prevented from falling.

In some embodiments, as shown in fig. 1, the second magnet 6 is identical in shape and clearance fit with the interior cavity of the sleeve 1. The term "clearance fit", i.e. the mechanically identical basic dimensions, is used in the case of one of the tolerance bands which do not intersect. The second magnet 6 is identical to the inner cavity of the sleeve 1 in shape and in clearance fit, and can be completely opposite to the first magnet 4, so that the repulsive force between the first magnet 4 and the second magnet 6 is ensured, and the telescoping performance of the probe body 2 is further ensured.

The foregoing is only a specific embodiment of the utility model to enable those skilled in the art to understand or practice the utility model. Although described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the embodiments, and they should be construed as covering the scope of the appended claims.

Claims

1. A magnetically repulsive probe, comprising:

the sleeve (1) is provided with an annular baffle (11) at the axial first end and an axial second end which is open;

the probe body (2) is inserted into the sleeve (1) and the head part of the probe body extends out of the inner hole of the annular baffle plate (11);

the ferromagnetic connecting disc (3) is fixed at the tail end of the probe body (2), and the cross section size of the ferromagnetic connecting disc (3) is larger than that of the probe body (2);

a first magnet (4) magnetically attracted to one side of the ferromagnetic connecting disc (3) away from the probe body (2);

the ferromagnetic cover body (5) is fixed at the axial second end of the sleeve (1);

and the second magnet is magnetically attracted to one side of the ferromagnetic cover body (5) close to the first magnet (4), and the magnetism of the second magnet (6) is the same as that of the first magnet (4).

2. The magnetically repulsive probe according to claim 1, characterized in that the first magnet (4) and the ferromagnetic land (3) are both the same shape and size.

3. The magnetically repulsive probe according to claim 2, characterized in that the second magnet (6) is identical in shape and clearance fit with the inner cavity of the sleeve (1).

4. The magnetically repulsive probe according to claim 1, characterized in that the first magnet (4) and the second magnet (6) are both permanent magnets.

5. The magnetic repulsion probe according to any one of claims 1 to 4, characterized in that a mounting hole (31) is formed in the center of the ferromagnetic connecting disc (3), one end, away from the probe body (2), of the mounting hole (31) is enlarged to form a counter bore (32), the ferromagnetic connecting disc (3) is fixed at the tail end of the probe body (2) through a bolt (7) penetrating through the mounting hole (31), the head of the bolt (7) is placed in the counter bore (32) and a screw portion is screwed in the probe body (2).

6. A magnetically repulsive probe according to any of claims 1-4, characterized in that the ferromagnetic cover (5) is detachably secured to the axial second end of the sleeve (1).

7. The magnetically-repellent probe according to claim 6, characterized in that the ferromagnetic cover (5) is screwed to the axial second end of the sleeve (1).