CN220894455U - PCB veneer high accuracy test fixture - Google Patents

Abstract

The utility model discloses a PCB single board high-precision test fixture, comprising: the base is provided with the locating plate on, still be provided with the support frame on the base, be provided with the fixing base on the support frame, fixing base sliding connection has hold-down mechanism, hold-down mechanism's clamp plate is located the top of locating plate, just the lower surface of clamp plate is provided with the pressure stick. The utility model can use the locating plate to rapidly align the PCB with the net mouth needle plate during the PCB test, and greatly reduces the time required by the manual alignment compared with the prior art, thereby simplifying the process and improving the test efficiency. In addition, compared with the existing mode of directly pressing down by the pressing plate, the pressing rod adopted by the lower surface of the pressing plate can obviously reduce the contact area with the PCB during testing, and can effectively protect devices on the PCB.

Description

PCB veneer high accuracy test fixture

Technical Field

The utility model belongs to the technical field of test equipment, and particularly relates to a high-precision test fixture for a PCB single board.

Background

The high-precision test fixture is used for testing PCB equipment and detecting blank PCB short circuit or open circuit, and testing equipment containing PCB semi-finished products and detecting whether the semi-finished products are normal in function or not, and assembling the semi-finished products into finished products after the normal functions. The existing test fixture is as high-precision test fixture for the PCB disclosed in application number CN107966649A, the contact area is large when the device is tested, the product is easy to damage, the PCB is required to be aligned manually during testing, the operation is complex, the time consumption is long, and certain limitation is brought during actual test operation.

Therefore, in order to achieve the purpose of completing the test in a short time and ensuring the integrity of the product, a high-precision test fixture for the PCB circuit board is required, which can effectively protect the product and is accurate in positioning during the test.

Disclosure of utility model

It is an object of the present utility model to address at least the above problems and/or disadvantages and to provide at least the advantages described below.

To achieve these objects and other advantages and in accordance with the purpose of the utility model, there is provided a PCB single board high precision test fixture comprising:

the base is provided with the locating plate on, still be provided with the support frame on the base, be provided with the fixing base on the support frame, fixing base sliding connection has hold-down mechanism, hold-down mechanism's clamp plate is located the top of locating plate, just the clamp plate is provided with the pressure stick.

Preferably, the structure of the supporting frame includes:

the support columns are provided with cover plates, and the fixing seats are arranged on the cover plates.

Preferably, the structure of the pressing mechanism includes:

the handle is rotationally connected with the fixed seat;

The sliding upright rod is rotationally connected with the fixed seat; the pressing plate is fixedly arranged at the lower end of the sliding vertical rod; a pressing block is fixedly arranged on the lower surface of the pressing plate;

and two ends of the transmission piece are hinged with the handle and the sliding vertical rod.

Preferably, the base is provided with a plurality of shaft rods, and the shaft rods penetrate through the positioning plate and the pressing plate through sliding bearings;

and the triangular fixing plate is fixedly connected to the upper end of the shaft lever.

Preferably, the structure of the base includes:

The bottom plate is provided with a plurality of vertical plates, the vertical plates are provided with panels, the panels are elastically connected with the positioning plates through spring pins, and the panels are provided with net mouth needle plates;

and the bottom plate cover is connected with the bottom plate through a hinge.

The utility model at least comprises the following beneficial effects: the utility model can use the locating plate to rapidly align the PCB with the net mouth needle plate during the PCB test, and greatly reduces the time required by the manual alignment compared with the prior art, thereby simplifying the process and improving the test efficiency. In addition, compared with the existing mode of directly pressing down by the pressing plate, the pressing rod adopted by the lower surface of the pressing plate can obviously reduce the contact area with the PCB during testing, and can effectively protect devices on the PCB.

Additional advantages, objects, and features of the utility model will be set forth in part in the description which follows and in part will become apparent to those having ordinary skill in the art upon examination of the following or may be learned from practice of the utility model.

Description of the drawings:

FIG. 1 is a schematic diagram of the overall structure of a PCB single board high-precision test fixture according to the present utility model;

FIG. 2 is a cross-sectional view of a PCB single board high precision test fixture according to the present utility model;

fig. 3 is a bottom view of a high-precision testing fixture for a PCB board according to the present utility model.

The specific embodiment is as follows:

The present utility model is described in further detail below with reference to the drawings to enable those skilled in the art to practice the utility model by referring to the description.

It will be understood that terms, such as "having," "including," and "comprising," as used herein, do not preclude the presence or addition of one or more other elements or groups thereof.

It should be noted that, in the description of the present utility model, the orientation or positional relationship indicated by the term is based on the orientation or positional relationship shown in the drawings, which are merely for convenience of describing the present utility model and simplifying the description, and are not indicative or implying that the apparatus or element to be referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore 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 relative importance.

In the description of the present utility model, unless explicitly specified and limited otherwise, the terms "mounted," "configured to," "engaged with," "connected to," and the like are to be construed broadly, and for example, "connected" may be a fixed connection, may be a detachable connection, or may be integrally connected, may be mechanically connected, may be electrically connected, may be directly connected, may be indirectly connected through an intermediate medium, may be communication between two members, and may be understood in a specific manner by those skilled in the art.

Furthermore, in the present utility model, unless expressly stated or limited otherwise, a first feature "up" or "down" a second feature may be a direct contact of the first and second features, or an indirect contact of the first and second features through an intervening medium. Moreover, a first feature being "above," "over" and "on" a second feature may be a first feature being directly above or obliquely above the second feature, or simply indicating that the first feature is level higher than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the first feature is less level than the second feature.

As shown in fig. 1 to 3, the high-precision testing jig for a PCB veneer of the present utility model includes: the base 1 is provided with a locating plate 4 thereon, the base 1 is also provided with a support frame 2, the support frame 2 is provided with a fixing seat 10, the fixing seat 10 is in sliding connection with a pressing mechanism, a pressing plate 12 of the pressing mechanism is located above the locating plate 4, and a pressing rod 15 is arranged on the lower surface of the pressing plate 12.

Working principle: when the utility model is used, the hold-down mechanism on the fixed seat 10 is pulled up, then the PCB to be tested is placed in the positioning plate 4, the test point of the PCB can be aligned with the net mouth needle plate 16 on the positioning plate 4 without manual adjustment, then the hold-down mechanism is pressed down, the PCB is pushed by the press bar 15 and the press block 17 arranged on the lower surface of the press plate 12 to move downwards, the test needle on the net mouth needle plate 16 is accurately contacted with the test point on the PCB through the notch 20 below the positioning plate 4, thus data can be transmitted into the test system, then the hold-down mechanism is pulled up, and the positioning plate 4 is reset to finish the test.

In the above technical solution, the structure of the supporting frame 2 includes:

The plurality of support columns 21 are provided with cover plates 7, and the fixing seats 10 are arranged on the cover plates 7.

When the utility model is used, 4 support columns 21 on the base and the cover plate 7 on the support columns 21 can play a role in stabilizing the whole equipment and the pressing mechanism.

In the above technical solution, the structure of the pressing mechanism includes:

A handle 9 rotatably connected to the fixed base 10;

A sliding upright 3 rotatably connected with the fixed seat 10; the pressing plate 12 is fixedly arranged at the lower end of the sliding vertical rod 3; a pressing block 17 is fixedly arranged below the pressing plate 12;

and the two ends of the transmission part 8 are hinged with the handle 9 and the sliding upright 3.

When the utility model is used, when the handle 9 is pulled up or pressed down, the sliding upright 3 and the pressing plate 12 at the lower end of the sliding upright 3 can rise or descend simultaneously along with the handle 9 under the action of the transmission piece 8, and the pressing block 17 and the pressing rod 15 on the lower surface of the pressing plate 12 effectively protect devices on the PCB by reducing the contact area with the PCB.

In the above technical solution, 3 shaft rods 13 are provided on the base 1, and the shaft rods 13 are penetrated through the positioning plate 4 and the pressing plate 12 by sliding bearings 14; and a triangle fixing plate 11 fixedly connected to the upper end of the shaft 13.

When the utility model is used, under the action of the shaft rod 13, the bearing 14 and the triangular positioning plate 11, the pressing mechanism does not shake or deviate caused by uneven hand force when being pulled up and pressed down.

In the above technical solution, the structure of the base 1 includes:

A bottom plate 22, on which a plurality of vertical plates 5 are arranged, wherein a panel 6 is arranged on the vertical plates 5, the panel 6 is elastically connected with the positioning plate 4 through a spring pin 18, and a net mouth needle plate 16 is arranged on the panel 6;

a base plate cover 23 connected to the base plate 22 by a hinge 19.

When the utility model is used, the bottom plate cover 23 is connected with the bottom plate 22 through the hinge 19, so that the maintenance and the replacement are convenient under the condition that the test circuit is aged. The function of the spring pins 18 is to reset the positioning plate 4 after the test is completed.

Although embodiments of the present utility model have been disclosed above, it is not limited to the details and embodiments shown and described, it is well suited to various fields of use for which the utility model would be readily apparent to those skilled in the art, and accordingly, the utility model is not limited to the specific details and illustrations shown and described herein, without departing from the general concepts defined in the claims and their equivalents.

Claims (3)

1. A PCB veneer high accuracy test fixture, its characterized in that includes:

The base is elastically connected with a positioning plate, the base is also provided with a support frame, the support frame is provided with a fixing seat, the fixing seat is slidably connected with a pressing mechanism, a pressing plate of the pressing mechanism is positioned above the positioning plate, and the lower surface of the pressing plate is provided with a pressing rod;

The structure of the support frame comprises:

the plurality of support columns are provided with cover plates, and the fixing seats are arranged on the cover plates;

The base is provided with a plurality of shaft rods, and the shaft rods are arranged on the positioning plate and the pressing plate in a penetrating manner through the sliding bearings;

and the triangular fixing plate is fixedly connected to the upper end of the shaft lever.

2. The PCB board high precision test fixture of claim 1, wherein the structure of the hold down mechanism comprises:

the handle is rotationally connected with the fixed seat;

the sliding upright rod is in sliding connection with the fixed seat; the pressing plate is fixedly arranged at the lower end of the sliding vertical rod; a pressing block is fixedly arranged on the lower surface of the pressing plate;

and two ends of the transmission piece are hinged with the handle and the sliding vertical rod.

3. The PCB board high precision test fixture of claim 1, wherein the structure of the base comprises:

The bottom plate is provided with a plurality of vertical plates, the vertical plates are provided with panels, the panels are elastically connected with the positioning plates through spring pins, and the panels are provided with net mouth needle plates;

and the bottom plate cover is connected with the bottom plate through a hinge.