CN219496479U

CN219496479U - Test pressure stick and test fixture

Info

Publication number: CN219496479U
Application number: CN202320491370.4U
Authority: CN
Inventors: 彭发根
Original assignee: Shenzhen Totest Electronic Co ltd
Current assignee: Shenzhen Totest Electronic Co ltd
Priority date: 2023-03-08
Filing date: 2023-03-08
Publication date: 2023-08-08
Anticipated expiration: 2033-03-08

Abstract

The test press bar comprises a first part and a second part, wherein the first part is rotationally connected with the second part; the first part comprises a table body part and a connecting part, wherein two ends of the table body part are respectively provided with a first end and a second end, and the end face radius of the first end is larger than that of the second end; the second part is provided with an opening close to the first part, the connecting part is inserted into the opening, and the radius of the end face of one end of the second part is equal to that of the end face of the first end; the bench body is PEEK block, and the second part is aluminum rod body. A test fixture comprises the test press rod. The second part of the test pressure bar is an aluminum bar body, has good conductivity and antistatic property, and the table body is a PEEK block, so that stable antistatic property can be kept, the influence of ambient temperature is avoided, the combination of the PEEK block and the test pressure bar has the advantages of the PEEK block and the PEEK block, and the problem that the pressure bar is broken due to PEEK toughness is generally easy to cause can be solved.

Description

Test pressure stick and test fixture

Technical Field

The utility model relates to the technical field of circuit board testing jigs, in particular to a testing pressure bar and a testing jig.

Background

After the PCB board is produced, it is generally required to test the PCB board, for example, whether the circuit is connected, shorted, disconnected, whether each pin is turned on, etc., to determine whether the produced PCB board meets the product requirements.

Most of the existing test pressure bars are integrally arranged, one end of a pointed end is easy to break, the test pressure bars and the test jig are fixedly arranged, the test pressure bars cannot be directly replaced, and the test pressure bars are affected when the circuit board is held.

Disclosure of Invention

The embodiment of the utility model aims to solve the technical problems that most of existing test pressure bars are integrally arranged, one end of a pointed end is easy to break, the test pressure bars and a test jig are fixedly arranged, and the test pressure bars cannot be directly replaced, so that the test pressure bars are affected when a circuit board is pressed.

In order to solve the above problems, the present utility model provides a pressure testing rod and a testing fixture.

In a first aspect, the utility model discloses a test press bar, which comprises a first part and a second part, wherein the first part is rotationally connected with the second part;

the first part comprises a table body part and a connecting part, wherein two ends of the table body part are divided into a first end and a second end, and the end face radius of the first end is larger than that of the second end;

the second part is provided with an opening near the first part, the connecting part is inserted into the opening, and the radius of the end face of one end of the second part is equal to the radius of the end face of the first end;

the table body is a PEEK block, and the second part is an aluminum rod body.

Preferably, the outer surface of the connecting part and the surface of the opening are provided with threads.

Preferably, a jack is disposed at one end of the second portion far away from the first portion, and the jack is connected with the test fixture.

Preferably, the pitch of the threads provided on the surface of the jack is M3 pitch standard.

Preferably, the second portion includes a cylindrical portion and a circular truncated cone portion, the cylindrical portion is connected with the circular truncated cone portion, and the connecting portion is inserted into one end of the circular truncated cone portion away from the cylindrical portion.

A second aspect, a test fixture, comprising an upper needle plate, a carrier plate, and a test press bar according to any one of the above;

the upper needle plate is connected with the carrier plate, the test pressing rod is arranged on the upper needle plate, and the second part faces the carrier plate.

Compared with the prior art, the technical effects achieved by the embodiment of the utility model include:

1. the test pressure stick divides two parts to set up, when first part rupture or damage, can avoid direct change test pressure stick through changing first part, prevent that the test pressure stick of changing from not conforming to current test demand, and the first part of corresponding demand can be prepared in the test to the test pressure stick direct change, under the test scene that corresponds, can be through changing first part, need not to change the test pressure stick.

2. The second part is the aluminium system stick body, has good conductivity and prevents static, and the stage body portion is the PEEK piece, because the characteristic of material, can keep stable antistatic property, avoids receiving ambient temperature's influence, and both combinations can have both advantages concurrently, ensure good antistatic can also avoid because PEEK toughness generally leads to pressing the cracked problem of stick easily.

3. The PCBA circuit board on the carrier plate is held under the pressure of test pressure stick at last faller, can avoid the whole damage of test pressure stick when using, and when first part or second part damaged, can correspond to change corresponding part, avoid whole change, simultaneously, can correspond to change first part, make it adapt to the test environment that corresponds.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings required for the description of the embodiments will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present utility model, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic diagram of a test press bar according to the present utility model;

FIG. 2 is a schematic cross-sectional view of a test press bar according to the present utility model;

fig. 3 is a schematic structural diagram of a test fixture according to the present utility model.

Reference numerals

1. Testing a pressure bar;

11. a first portion; 111. a table body; 1111. a first end; 1112. a second end; 112. a connection part;

12. a second portion; 121. opening holes; 122. a jack; 123. a column portion; 124. a round table part;

100. testing a jig; 2. an upper needle plate; 3. and a carrier plate.

Detailed Description

The technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the drawings in the embodiments of the present utility model, in which like reference numerals represent like components. It will be apparent that the embodiments described below are only some, but not all, embodiments of the utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

It should be understood that the terms "comprises" and "comprising," when used in this specification and the appended claims, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof.

It is also to be understood that the terminology used in the description of the embodiments of the utility model herein is for the purpose of describing particular embodiments only and is not intended to be limiting of embodiments of the utility model. As used in the specification of the embodiments of the utility model and the appended claims, the singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise.

Referring to fig. 1-2, in a first aspect, the present utility model discloses a test press bar 1, which comprises a first portion 11 and a second portion 12, wherein the first portion 11 is rotatably connected with the second portion 12; the first portion 11 includes a platform 111 and a connecting portion 112, two ends of the platform 111 are divided into a first end 1111 and a second end 1112, and an end surface radius of the first end 1111 is larger than an end surface radius of the second end 1112; the second portion 12 is provided with an opening 121 near the first portion 11, the connecting portion 112 is inserted into the opening 121, and an end surface radius of one end of the second portion 12 is equal to an end surface radius of the first end 1111.

Specifically, the test pressure bar 1 is arranged in two parts, when the first part 11 is broken or damaged, the test pressure bar 1 can be prevented from being directly replaced by replacing the first part 11, and the replaced test pressure bar 1 is prevented from not meeting the current test requirement. In addition, the first part 11 of the pressure testing rod 1 is directly replaced, the first part 11 corresponding to the requirement can be prepared during testing, and the pressure testing rod 1 can be replaced without changing the first part 11 under the corresponding testing scene.

The table body 111 is made of bakelite or PEEK (polyetheretherketone). The second portion 12 is an aluminum rod. The antistatic property can be stabilized to the power of 6-7 of 10 through the combination of aluminum and PEEK. Because of the self property of the material, the aluminum has good conductive performance, the PEEK antistatic performance is stable and is not influenced by the environmental temperature, the PEEK antistatic material can normally exert the performance in winter, has good hardness, can reduce the occurrence of self damage, and has good combination of the characteristics of the PEEK and the aluminum for the combination of the first part 11 and the second part 12. The second portion 12 may have good antistatic property, and has enough hardness, and the PEEK of the first portion 11 has stable antistatic property, and has small volume, so that the number of times of occurrence of the problem of damage of the PEEK is reduced, the test pressure bar 1 may have the characteristics of two materials, the antistatic property of the test pressure bar 1 is improved, and the service life of the test pressure bar 1 is prolonged.

The outer surface of the connecting part 112 and the surface of the opening 121 are provided with threads. It will be appreciated that the first portion 11 is rotatably connected to the second portion 12 by a mating threaded arrangement such that the second portion 12 is secured to the first portion 11.

Optionally, the connection portion 112 is provided as a protrusion, the surface of the opening 121 is provided as a groove matched with the connection portion 112, and the connection portion 112 and the opening 121 are clamped stably by clamping the connection portion 112 into the opening 121, so that the connection portion 112 can be pulled out directly during replacement, and the convenience of use is improved.

The end of the second portion 12 far away from the first portion 11 is provided with a jack 122, and the jack 122 is connected with the test fixture 100. Specifically, the pitch of the threads provided on the surface of the jack 122 is M3 pitch standard, the test fixture 100 is provided with a plug matched with the jack 122, and the second portion 12 may be inserted with a corresponding plug.

Alternatively, the insertion hole 122 and the second portion 12 may be bonded by a specific glue, so that the first portion 11 may be more firmly inserted into the second portion 12.

The second portion 12 includes a cylindrical portion 123 and a circular truncated cone portion 124, the cylindrical portion 123 is connected to the circular truncated cone portion 124, and the connecting portion 112 is inserted into an end of the circular truncated cone portion 124 away from the cylindrical portion 123.

Specifically, the round platform portion 124 and the column portion 123 are integrally formed, the jack 122 is correspondingly arranged on the column portion 123, the column portion 123 can be inserted on a plug, the connecting portion 112 is inserted on the round platform portion 124, it can be understood that the second portion 12 is an irregular column, the round platform portion 124 is close to a circuit board to be tested, the contact surface of the round platform portion 124 is smaller than the cross section of the column portion 123, the contact area with the circuit board to be tested can be reduced, the acting force is increased, in addition, as the distance between elements on the circuit board is small, the elements on the circuit board can be prevented from being pressed excessively through reducing the contact area, and damage to the elements on the circuit board can be avoided due to construction.

Referring to fig. 1-3, in a second aspect, the present utility model further provides a test fixture 100, which includes an upper needle board 2, a carrier board 3, and the test press bar 1 of any one of the above-mentioned aspects; the upper needle plate 2 is connected with the carrier plate 3, the pressure testing rod 1 is arranged on the upper needle plate 2, and the second part 12 faces the carrier plate 3.

Specifically, the carrier plate 3 is used for placing a circuit board to be tested, the upper needle plate 2 is provided with a test probe 21, the test probe 21 is used for testing the electrical property of the circuit board, wherein the upper needle plate 2 is provided with a test pressure bar 1, and the test pressure bar 1 can press the circuit board.

It can be understood that the test pressing bar 1 presses the PCBA circuit board on the carrier plate 3 under the pressing of the upper needle plate 2, so that the circuit board is kept in a stable state; when the circuit board is pressed and held by the test pressure bar 1, one end of the test pressure bar 1, which is close to the circuit board to be tested, is set to be made of PEEK, the antistatic performance of the test pressure bar 1 is increased, meanwhile, the hardness of the first part 11 is increased, the whole damage of the test pressure bar 1 can be avoided, when the first part 11 or the second part 12 is damaged, the corresponding part can be correspondingly replaced, the whole replacement is avoided, and meanwhile, the first part 11 can be correspondingly replaced, so that the test pressure bar is suitable for the corresponding test environment.

In the foregoing embodiments, the descriptions of the embodiments are focused on, and for those portions of one embodiment that are not described in detail, reference may be made to the related descriptions of other embodiments.

In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present utility model and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model.

Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present utility model, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.

In the present utility model, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be attached, detached, or integrated, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. 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.

In the present utility model, unless expressly stated or limited otherwise, a first feature "above" or "below" a second feature may include both the first and second features being in direct contact, as well as the first and second features not being in direct contact but being in contact with each other through additional features therebetween. Moreover, a first feature being "above," "over" and "on" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is higher in level than the second feature. The first feature being "under", "below" and "beneath" the second feature includes the first feature being directly under and obliquely below the second feature, or simply means that the first feature is less level than the second feature.

In the description of the present specification, a description referring to terms "one embodiment," "some embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present utility model. In this specification, schematic representations of the above terms should not be understood as necessarily being directed to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, one skilled in the art can combine and combine the different embodiments or examples described in this specification.

It will be apparent to those skilled in the art that various modifications and variations can be made to the present utility model without departing from the spirit or scope of the utility model. Thus, it is intended that the present utility model also include such modifications and alterations insofar as they come within the scope of the appended claims or the equivalents thereof.

While the utility model has been described with reference to certain preferred embodiments, it will be understood by those skilled in the art that various changes and substitutions of equivalents may be made and equivalents will be apparent to those skilled in the art without departing from the scope of the utility model. Therefore, the protection scope of the utility model is subject to the protection scope of the claims.

Claims

1. The test press bar is characterized by comprising a first part and a second part, wherein the first part is rotationally connected with the second part;

the table body is a PEEK block, and the second part is an aluminum rod body.

2. The test press bar of claim 1, wherein the connection portion outer surface is threaded with the bore surface.

3. The test press bar of claim 1, wherein an end of the second portion remote from the first portion is provided with a socket, the socket being connected to a test fixture.

4. A test press bar as claimed in claim 3, wherein the socket surface is provided with a pitch of M3 pitch standard.

5. The test press bar of claim 1, wherein the second portion comprises a cylindrical portion and a frustoconical portion, the cylindrical portion being connected to the frustoconical portion, the connecting portion being inserted into an end of the frustoconical portion distal from the cylindrical portion.

6. A test fixture, comprising an upper needle plate, a carrier plate and a test press bar according to any one of claims 1-5;