CONTACT PROBE

An embodiment of the present application provides a contact probe, which comprises a tubular structure, an engagement part, a pushing part and an elastic member. The elastic member is received within the tubular structure; the engagement part is arranged within the tubular structure; the pushing part is arranged within the tubular structure and is arranged at the inner wall of the tubular structure opposite to the engagement part; a part of the elastic member is arranged in the tubular structure, and a side surface at a first end of the elastic member is engaged with the engagement part, and the pushing part presses a side surface of the elastic member facing the pushing part, and both the engagement part and the pushing part press the elastic member to make the elastic member in a bent state, and make a part of the elastic member in the tubular structure to abut closely against the inner wall of the tubular structure. In the present embodiment, when using the contact probe, the elastic member can always bend in one direction and contact with a same part of the inner wall of the tubular structure, which can improve the stability of the structures within the contact probe, so as to improve the stability of electrical testing.

TECHNICAL FIELD

The present application relates to the field of electrical testing, specifically to a contact probe.

BACKGROUND

In the production process of electrical components, such as IC (Integrated Circuit) packages, it is necessary to use a relevant test device to test the electrical performance thereof. Such a test device generally includes a socket electrically connected to another electrical component (such as a wiring substrate).

A socket in the related art includes a socket cylinder and a contact probe, wherein a receiving part for receiving a first electrical component is formed on the socket cylinder, and a probe receiving hole is also formed on the socket cylinder, and the contact probe is received in the probe receiving hole. In the process of electrical testing, the first electrical component is placed in the receiving part, one end of the contact probe contacts with the terminal of the first electrical component, and the other end of the contact probe contacts with another electrical component (hereinafter referred to as a second electrical component), thus establishing an electrical connection between the first electrical component and the second electrical component.

In order to ensure the accuracy of the electrical test results, the resistance value of the contact probe is not allowed to exceed an allowable resistance value. According to the different loads applied to the second component by the contact probe during operation (hereinafter referred to as loads), the contact probe can be divided into various types. The inventors of this disclosure found that the resistance value of the contact probe of a type with a relatively small load will increase with the increase of the number of electrical tests. This means that with the increase of the number of electrical tests, the resistance value of the contact probe of the type with a relatively small load will frequently exceed the allowable resistance value, which will adversely affect the accuracy of the electrical test results, thus worsening the reliability of the electrical test.

SUMMARY

The embodiment of the present application provides a contact probe to improve the reliability of electrical test.

The embodiment of the present application provides a contact probe, which comprises a tubular structure, an engagement part, a pushing part and an elastic member. The elastic member is received within the tubular structure; the engagement part is arranged within the tubular structure; the pushing part is arranged within the tubular structure and is arranged at an inner wall of the tubular structure opposite to the engagement part; a part of the elastic member is arranged in the tubular structure, and a side surface at a first end of the elastic member is engaged with the engagement part, and the pushing part presses a side surface of the elastic member facing the pushing part, and both the engagement part and the pushing part press the elastic member to make the elastic member in a bent state, and make a part of the elastic member in the tubular structure to abut closely against the inner wall of the tubular structure.

According to the contact probe in the embodiment of the present application, the engagement part and the pushing part are simultaneously arranged on the inner wall of the tubular structure, and the engagement part and the pushing part are oppositely arranged at two sides of the inner wall of the tubular structure. When the elastic member is assembled within the tubular structure, the side surface at the first end of the elastic member is engaged with the engagement part, and the pushing part presses a side surface of the elastic member facing the pushing part, so that the elastic member can be in a bent state under the pressing of both the engagement part and the pushing part. At this time, the elastic member will abut closely against the inner wall of the tubular structure. In the present embodiment, when the elastic member is installed within the tubular structure, firstly, the elastic member is bent in advance through the joint action of the engagement part and the pushing part, so that the elastic member always bends in one direction when it is bent, and when using the contact probe, the elastic member can always bend in one direction and contact with a same part of the inner wall of the tubular structure, which can improve the stability of the structures within the contact probe, so as to improve the stability of electrical testing.

In some embodiments of the present application, the elastic member comprises tight coil parts at two ends thereof and a loose coil part arranged between the tight coil parts;

the engagement part is engaged with the tight coil part at the first end of the elastic member, and the tight coil part at a second end of the elastic member protrudes out of the tubular structure;

when the elastic member is not compressed, the loose coil part abuts against the inner wall of the tubular structure, and when the elastic member is compressed, a part of the tight coil part protruding out of the tubular structure abuts closely against the inner wall of the tubular structure.

In some embodiments of the present application, the engagement part is clamped into a coil of the tight coil part, and the pushing part presses a side surface of the tight coil part facing the pushing part to make the elastic member in a bent state.

In some embodiments of the present application, the engagement part and the pushing part are integrally formed with the tubular structure.

In some embodiments of the present application, a tube wall of the tubular structure is provided with a first cutting groove, and a part of the tube wall of the tubular structure extends into a receiving cavity along the first cutting groove to form the engagement part.

In some embodiments of the present application, the tube wall of the tubular structure is provided with a second cutting groove, and a part of the tube wall of the tubular structure extends into the receiving cavity along the second cutting groove to form the pushing part.

In some embodiments of the present application, the contact probe further comprises a blocking part, which is arranged within the receiving cavity and fixedly connected to the tubular structure, and an end face at the first end of the elastic member abuts against the blocking part.

In some embodiments of the present application, the blocking part is integrally formed with the tubular structure.

In some embodiments of the present application, the tube wall of the tubular structure is provided with a third cutting groove, and a part of the tube wall of the tubular structure extends into the receiving cavity along the third cutting groove to form the blocking part.

In some embodiments of the present application, an outer wall of the tubular structure is provided with at least one protrusion.

DETAILED DESCRIPTION

The technical solutions of the embodiments of the present application will be below clearly and completely described with reference to the drawings of the embodiments of the present application. Obviously, the described embodiments are only parts of the embodiments of the present application instead of all embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary skilled in the art based on the present application belong to the protection scope of the present application.

As shown inFIGS.1to3, an embodiment of the present application provides a contact probe, which comprises a tubular structure100, an engagement part110, a pushing part120and an elastic member200. The elastic member200is received within the tubular structure100; the engagement part110is arranged within the tubular structure100; the pushing part120is arranged within the tubular structure100and is arranged at the inner wall of the tubular structure100opposite to the engagement part110; a part of the elastic member200is arranged within the tubular structure100, and a side surface at a first end of the elastic member200is engaged with the engagement part110, and the pushing part120presses a side surface of the elastic member200facing the pushing part, and both the engagement part110and the pushing part120press the elastic member200to make the elastic member200in a bent state, and make a part of the elastic member200within the tubular structure100to abut closely against the inner wall of the tubular structure100.

According to the contact probe in the embodiment of the present application, the engagement part110and the pushing part120are simultaneously arranged on the inner wall of the tubular structure100, and the engagement part110and the pushing part120are oppositely arranged at two sides of the inner wall of the tubular structure100. When the elastic member200is assembled within the tubular structure100, the side surface at the first end of the elastic member200is engaged with the engagement part110, and the pushing part120presses the side surface of the elastic member200facing the pushing part, so that the elastic member200can be in a bent state under the pressing of both the engagement part110and the pushing part120. At this time, the elastic member200will abut closely against the inner wall of the tubular structure100. In the present embodiment, when the elastic member200is installed within the tubular structure100, firstly, the elastic member200is bent in advance through the joint action of the engagement part110and the pushing part120, so that the elastic member200always bends in one direction when it is bent, and when using the contact probe, the elastic member200can always bend in one direction and contact with a same part of the inner wall of the tubular structure100, which can improve the stability of the structures within the contact probe, so as to improve the stability of electrical testing.

As shown inFIG.4, in some embodiments of the present application, the elastic member200includes tight coil parts220at two ends thereof and a loose coil part210arranged between the tight coil parts220; the engagement part110is engaged with the tight coil part220at the first end of the elastic member200, and the tight coil part220at the second end of the elastic member200protrudes out of the tubular structure100. When the elastic member200is not compressed, the loose coil part210abuts against the inner wall of the tubular structure100, and when the elastic member200is compressed, the part of the tight coil part220protruding out of the tubular structure100abuts closely against the inner wall of the tubular structure100. In the present embodiment, the elastic member200includes two parts, i.e., the tight coil parts arranged at two ends, and the middle part being the loose coil part. In addition, the loose coil part of the elastic member200is located within the tubular structure100, while the tight coil part at one end is engaged with the engagement part110of the tubular structure100, and the tight coil part at the other end protrudes out of the tubular structure100. It can be understood that the loose coil part is always located within the tubular structure100when using the contact probe, so that the elastic member can always contact with the inner wall at the same side of the tubular structure100, and a detection error caused by the elastic member shaking back and forth can be avoided.

As shown inFIG.5, in some embodiments of the present application, the engagement part110is clamped into a coil of the tight coil part220, and the pushing part120presses a side surface of the tight coil part220facing the pushing part to make the elastic member200in a bent state. In the present embodiment, when the elastic member200is mounted to the tubular structure100, the tight coil part of the elastic member200can be clamped into the coil of the tight coil part, so that the elastic member200can be firmly fixed to the tubular structure100. At this time, the pushing part120presses a side surface of the tight coil part facing the pushing part to bend the elastic member200to one side, so that the elastic member200can bend in one direction, which can improve the stability of the structures within the contact probe.

As shown inFIGS.6and7, in some embodiments of the present application, the engagement part110and the pushing part120are integrally formed with the tubular structure100. In the present embodiment, the engagement part110and the pushing part120can be integrally formed with the tubular structure100. Compared with fixing the engagement part110or the pushing part120on the inner wall of the tubular structure100in other ways, the integral formation in the present embodiment can improve the structural stability of the tubular structure100and the engagement part110or the pushing part120.

In some embodiments of the present application, a tube wall of the tubular structure100is provided with a first cutting groove111, and a part of the tube wall of the tubular structure100extends into the receiving cavity along the first cutting groove111to form the engagement part110. In the present embodiment, the tube wall of the tubular structure100is provided with the first cutting groove111, thus the part of the tube wall of the tubular structure100provided with the first cutting groove111can be pressed toward the inside of the tubular structure100to form the engagement part110. In the present embodiment, the tubular structure100and the engagement part110provided within the tubular structure100are integrally formed, which can save the cost.

In some embodiments of the present application, the tube wall of the tubular structure100is provided with a second cutting groove121, and a part of the tube wall of the tubular structure100extends into the receiving cavity along the second cutting groove121to form the pushing part120. In the present embodiment, the tube wall of the tubular structure100is also provided with the second cutting groove121, thus the part of the tube wall of the tubular structure100provided with the second cutting groove121can be pressed toward the inside of the tubular structure100to form the pushing part120. In the present embodiment, the tubular structure100and the pushing part120provided within the tubular structure100are integrally formed, which can save the cost.

As shown inFIG.8, in some embodiments of the present application, the contact probe further comprises a blocking part130, which is arranged within the receiving cavity and fixedly connected to the tubular structure100, and an end face at the first end of the elastic member200abuts against the blocking part130. In the present embodiment, the blocking part130is further formed within the tubular structure100. When the elastic member200is installed within the tubular structure100, the end face at the first end of the elastic member200abuts against the blocking part130. By providing the blocking part130, the stability of the elastic member200within the tubular structure100can be improved.

In some embodiments of the present application, the blocking part130is integrally formed with the tubular structure100. In the present embodiment, the blocking part130can be integrally formed with the tubular structure100. Compared with fixing the blocking part130on the inner wall of the tubular structure100in other ways, the integral formation in the present embodiment can improve the structural stability of the tubular structure100and the blocking part130.

In some embodiments of the present application, the tube wall of the tubular structure100is provided with a third cutting groove131, and a part of the tube wall of the tubular structure100extends into the receiving cavity along the third cutting groove131to form the blocking part130. In the present embodiment, the tube wall of the tubular structure100is also provided with the third cutting groove131, thus the part of the tube wall of the tubular structure100provided with the third cutting groove131can be pressed toward the inside of the tubular structure100to form the blocking part130. In the present embodiment, the tubular structure100and the blocking part130provided within the tubular structure100are integrally formed, which can save the cost.

In some embodiments of the present application, an outer wall of the tubular structure100is provided with at least one protrusion140. In the present embodiment, a plurality of protrusions are formed on the outer wall of the tubular structure100, which can play a role in anti-slip.

In some embodiments of the present application, the contact probe comprises a tubular structure100, an engagement part110and an elastic member200. The elastic member200is received within the tubular structure100; the engagement part110is arranged within the tubular structure100; a part of the elastic member200is arranged within the tubular structure100, and a first end of the elastic member200is engaged with the engagement part110. The elastic member200abuts closely against an inner wall of the tubular structure100, and a part of the tubular structure100abutting against the elastic member200has at least two contact surfaces300.

In the present embodiments, the elastic member200is arranged within the tubular structure100. During installation, the first end of the elastic member200is engaged with the engagement part110of the tubular structure100. At this time, the elastic member200abuts closely against the inner wall of the tubular structure100, and a part of the tubular structure100abutting against the elastic member200has at least two contact surfaces300. That is to say, the elastic member200has at least three contact points with the tubular structure100, in which the first end of the elastic member200is in contact with the engagement part110, and a side wall of the elastic member200has two contact surfaces300with the inner wall of the tubular structure100, thus forming a stable support with at least three contact points. When using the contact probe, since the elastic member200has stable contact surfaces300with the tubular structure100, the elastic member200, when it is bent, can always contact with at least two contact surfaces300of the tubular structure100, thereby improving the stability of the structures within the contact probe and improving the reliability of electrical testing.

In some embodiments of the present application, the number of contact surfaces300is two. In the present embodiment, after the first end of the elastic member200is engaged with the engagement part110of the tubular structure100, at this time, the elastic member200abuts closely against the inner wall of the tubular structure100, and the part of the tubular structure100abutting against the elastic member200has two contact surfaces300. That is to say, there are three contact points between the elastic member200and tubular structure100, in which the first end of the elastic member200is contacted with the engagement part110, and the side wall of the elastic member200has two contact surfaces300with the inner wall of the tubular structure100, thus forming a stable support with the three contact points. When using the contact probe, since the elastic member200has the stable contact surfaces300with the tubular structure100, the elastic member200, when it is bent, can always contact with at least two contact surfaces300of the tubular structure100, thereby improving the stability of the structures within the contact probe and improving the reliability of electrical testing.

As shown inFIG.9, in some embodiments of the present application, the shape of the cross section of the part of the tubular structure100abutting against the elastic member200is a quasi-parallelogram, and the contact surfaces300are located on two adjacent sides of the quasi-parallelogram. In the present embodiment, the shape of the cross section of the tubular structure100can be substantially a parallelogram, and the elastic member200can be in contact with two adjacent sides of the parallelogram, and four corners of the parallelogram can be transitioned by arcs or chamfers, which is not particularly limited here.

As shown inFIG.10, in some embodiments of the present application, the shape of the cross section of the part of the tubular structure100abutting against the elastic member200is a quasi-pentagon, which includes at least two first straight lines, and the contact surfaces300are located on two adjacent first straight lines. In the present embodiment, the cross section of the tubular structure100can also be a quasi-pentagon, which can be understood as a shape having five sides, wherein the quasi-pentagon includes at least two first straight lines, and the two contact surfaces300of the tubular structure100with the elastic member200are located on the two adjacent first straight lines of the quasi-pentagon. The other three sides of the quasi-pentagon can be curves or straight lines, which is not particularly limited here, and the sizes of the five sides of the quasi-pentagon are also not particularly limited.

As shown inFIG.11, in some embodiments of the present application, the quasi-pentagon further includes one second straight line and two arcs, one end of the second straight line is connected to one of the arcs, the other end of the second straight line is connected to the other one of the arcs, and the ends of the two arcs away from the second straight line are connected to the first straight line respectively. In the present embodiment, the quasi-pentagon also has a second straight line and two arcs, wherein two ends of the second straight line are respectively connected to the two arcs, and the ends of the arcs away from the second straight line are respectively connected to the two first straight lines.

In some embodiments of the present application, the shape of the cross section of the part of the tubular structure100abutting against the elastic member200is substantially a pentagon, and the contact surfaces300are located on any two sides of the pentagon. In the present embodiment, the shape of the cross section of the part of the tubular structure100abutting against the elastic member is substantially a pentagon. In this case, all five sides of the pentagon are straight lines, and the contact surfaces300of the tubular structure100with the elastic member200are located on any two sides of the five sides. The five corners of the pentagon can have circular chamfers to avoid excessively sharp edges and corners.

As shown inFIG.12, in some embodiments of the present application, the shape of the cross section of the part of the tubular structure100abutting against the elastic member200is a quasi-hexagon, which includes at least two straight lines which are arranged at intervals, and the contact surfaces300are located on the two straight lines of the at least two straight lines. In the present embodiment, the cross section of the part of the tubular structure100abutting against the elastic member200is a quasi-hexagon, which has at least two straight lines, and at least two straight lines are included in six sides of the quasi-hexagon, and the two straight lines are arranged at intervals, and the contact surfaces300of the tubular structure100with the elastic member200are located on the two straight lines arranged at intervals.

As shown inFIG.13, in some embodiments of the present application, the shape of the cross section of the part of the tubular structure100abutting against the elastic member200is substantially a regular hexagon, and the contact surfaces300are located on any two adjacent sides of the regular hexagon. In the present embodiment, the shape of the cross section of the part of the tubular structure100abutting against the elastic member200is a regular hexagon, and the lengths of six sides are the same. In the present embodiment, the contact surfaces300of the tubular structure100with the elastic member200are located on any two adjacent sides of the regular hexagon.

In some embodiments of the present application, the number of contact surfaces300is three. In the present embodiment, the contact surfaces300of the tubular structure100with the elastic member200can be three contact surfaces. After the first end of the elastic member200is engaged with the engagement part110of the tubular structure100, the elastic member200abuts closely against the inner wall of the tubular structure100, and the part of the elastic member200abutting against the tubular structure100has three contact surfaces300. That is to say, there are four contact points between the elastic member200and the tubular structure100, wherein the first end of the elastic member200is contacted with the engagement part110, and the side wall of the elastic member200has three contact surfaces300with the inner wall of the tubular structure100, thus forming a stable support with the four contact points. When using the contact probe, since the elastic member200has the stable contact surfaces300with the tubular structure100, the elastic member200, when it is bent, can always contact with at least three contact surfaces300of the tubular structure100, thereby improving the stability of the structures within the contact probe and improving the reliability of electrical testing.

In some embodiments of the present application, the shape of the cross section of the part of the tubular structure100abutting against the elastic member200is a quasi-hexagon, which includes one first arc and two first straight lines, one end of the first arc is connected to one of the first straight lines, the other end of the first arc is connected to the other one of the first straight lines, and the contact surfaces300are located on the first arc and the two first straight lines respectively. In the present embodiment, the shape of the cross section of the part of the tubular structure100abutting against the elastic member200is a quasi-hexagon, which includes six sides including one first arc and two first straight lines. The ends of the first arc are connected to one end of each of the two first straight lines respectively, and three contact surfaces300of the tubular structure100with the elastic member200are located on the first arc and the two first straight lines respectively.

In some embodiments of the present application, the quasi-hexagon further comprises two second arcs and one second straight line, one end of the second straight line is connected to one of the second arcs, the other end of the second straight line is connected to the other one of the second arcs, and the ends of the two second arcs away from the second straight line are connected to the first straight line respectively. In the present embodiment, six sides of the quasi-hexagon include two second arcs and one second straight line, wherein two ends of the second straight line are connected to the two second arcs respectively, and three contact surfaces300of the tubular structure100with the elastic member200are located on the two second arcs and the one first straight line respectively.

It should be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms “comprising”, “including” or any other variation thereof are intended to cover non-exclusive inclusion, so that a process, method, item or device including a series of elements includes not only those elements, but also other elements not explicitly listed or elements inherent to such process, method, item or device. Without further restrictions, an element defined by the phrase “comprising one” does not exclude the existence of other identical elements in the process, method, item or device including the element.

Each embodiment in this description is described in a related manner, and the same and similar parts among these embodiments can be referred to each other, and each embodiment focuses on the differences from other embodiments.

The above are only the preferred embodiments of the present application, and is not intended to limit the protection scope of the present application. Any modification, equivalent replacements, improvement, etc. made within the spirit and principles of the present application are included in the protection scope of the present application.