CN215575260U

CN215575260U - Holding needle floating adjustable test fixture mechanism

Info

Publication number: CN215575260U
Application number: CN202121491114.2U
Authority: CN
Inventors: 黄杰华
Original assignee: Shenzhen Lihexing Co ltd
Current assignee: Shenzhen Lihexing Co ltd
Priority date: 2021-06-30
Filing date: 2021-06-30
Publication date: 2022-01-18
Anticipated expiration: 2031-06-30

Abstract

The utility model discloses a test fixture mechanism with a holding needle capable of being adjusted in a floating mode, which comprises a mounting plate, a PCB fixedly mounted at the bottom of the mounting plate, a floating plate movably arranged at the top of the mounting plate, and a bearing seat arranged above the floating plate and used for placing a product to be tested; a first jacking mechanism is arranged below the mounting plate and is in driving connection with the floating plate; the floating plate is also provided with a plurality of holding needles, and the bottoms of the holding needles penetrate through the mounting plate and are connected with the PCB; the floating plate is also provided with a plurality of floating adjusting components, and each floating adjusting component and one holding pair are correspondingly arranged. The utility model has reasonable design and compact structure, is provided with the floating adjusting component, can self-adaptively adjust the position of the holding needle through the floating adjusting component when the first jacking mechanism drives the holding needle to be contacted with the product pins, further can avoid the phenomena of dislocation of the holding needle and the pins, unstable contact and the like caused by position tolerance among different pins, and has strong practicability.

Description

Holding needle floating adjustable test fixture mechanism

Technical Field

The utility model relates to the technical field of test fixtures, in particular to a test fixture mechanism with a floatable and adjustable holding needle.

Background

In the field of single board and complete machine testing technology, testing product performance by contacting and conducting a holding pin (probe) with a product pin is the most common testing method, while in a conventional testing fixture, the holding pin and the product are basically in hard contact, which is easy to cause poor contact or damage to the product, and in the process of contacting the holding pin and the pin, because the position of the holding pin cannot be adjusted in a self-adaptive manner, the situation that most pins are clamped and individual pins are not clamped may occur due to position deviation, and therefore, the improvement is needed.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a test fixture mechanism with a holding needle capable of being adjusted in a floating mode, the test fixture mechanism is reasonable in design and compact in structure and is provided with a floating adjusting assembly, when the first jacking mechanism drives the holding needle to be in contact with a product pin, the position of the holding needle can be adjusted in a self-adaptive mode through the floating adjusting assembly, the phenomena that the holding needle is staggered with the pin and the contact is unstable due to position tolerance among different pins can be avoided, the test passing rate of the product can be ensured, and the test fixture mechanism is high in practicability.

In order to realize the purpose, the following technical scheme is adopted:

a test fixture mechanism with a holding needle capable of being adjusted in a floating mode comprises a mounting plate, a PCB fixedly mounted at the bottom of the mounting plate, a floating plate movably arranged at the top of the mounting plate, and a bearing seat arranged above the floating plate and used for placing a product to be tested; a first jacking mechanism is arranged below the mounting plate and is in driving connection with the floating plate; the floating plate is also provided with a plurality of holding needles, and the bottoms of the holding needles penetrate through the mounting plate and are connected with the PCB; the floating plate is also provided with a plurality of floating adjusting components, and each floating adjusting component and one holding pin are correspondingly arranged; the first jacking mechanism is used for driving the floating plate to drive the plurality of embracing needles to ascend, and the floating adjusting assembly is used for adjusting the positions of the embracing needles so that the embracing needles can embrace the pins of the product to be detected when the embracing needles contact the pins of the product to be detected.

Furthermore, a plurality of mounting holes are formed in the floating plate, and two mounting grooves are respectively formed in two ends of each mounting hole; the floating adjusting component comprises a floating spring arranged in the mounting groove and a floating sleeve sleeved on the outer wall of the middle part of the holding needle; each holding needle is inserted in a mounting hole, and the bottoms of the two ends of the floating sleeve on the outer wall of each holding needle are respectively abutted against a floating spring.

Furthermore, a plurality of guide shafts are further arranged between the mounting plate and the bearing seat, and the floating plate is movably sleeved outside the guide shafts.

Furthermore, a plurality of buffer springs are connected between the floating plate and the bearing seat.

Further, the first jacking mechanism comprises a fixed plate arranged below the mounting plate, a plurality of fixed columns connected between the fixed plate and the mounting plate, and a jacking cylinder mounted on the fixed plate; and an output shaft of the jacking cylinder penetrates through the mounting plate and is connected with the bottom of the floating plate.

By adopting the scheme, the utility model has the beneficial effects that:

reasonable in design, compact structure are equipped with unsteady adjusting part, and when first climbing mechanism drive was embraced the needle and is contacted with the product pin, can embrace the position of needle through unsteady adjusting part self-adaptation regulation, and then can avoid leading to embracing needle and pin dislocation and contact unstability etc. phenomenon to take place because of the position tolerance between the different pins, and then can guarantee the test through rate of product, and the practicality is strong.

Drawings

FIG. 1 is a perspective view of the present invention;

FIG. 2 is an exploded view of FIG. 1;

FIG. 3 is an exploded view of the float plate and brooch of the present invention;

wherein the figures identify the description:

1, mounting a plate; 2-PCB board;

3, floating plate; 4-a bearing seat;

5-a first jacking mechanism; 6-a floating adjustment assembly;

7-a guide shaft; 8-a buffer spring;

31-embracing the needle; 51, fixing plates;

52-fixed column; 53-jacking cylinder;

61-a floating spring; 62-floating sleeve.

Detailed Description

The utility model is described in detail below with reference to the figures and the specific embodiments.

Referring to fig. 1 to 3, the utility model provides a test fixture mechanism with a probe capable of being adjusted in a floating manner, which comprises a mounting plate 1, a PCB 2 fixedly mounted at the bottom of the mounting plate 1, a floating plate 3 movably arranged at the top of the mounting plate 1, and a bearing seat 4 arranged above the floating plate 3 and used for placing a product to be tested; a first jacking mechanism 5 is further arranged below the mounting plate 1, and the first jacking mechanism 5 is in driving connection with the floating plate 3; the floating plate 3 is also provided with a plurality of holding needles 31, and the bottoms of the holding needles 31 penetrate through the mounting plate 1 and are connected with the PCB 2; a plurality of floating adjusting components 6 are further arranged on the floating plate 3, and each floating adjusting component 6 is arranged corresponding to one holding needle 31; the first jacking mechanism 5 is used for driving the floating plate 3 to drive the plurality of embracing needles 31 to ascend, and the floating adjusting assembly 6 is used for adjusting the positions of the embracing needles 31 so that the embracing needles 31 embrace the pins of the product to be tested when the embracing needles 31 contact the pins of the product to be tested.

The floating plate 3 is provided with a plurality of mounting holes, and two ends of each mounting hole are respectively provided with a mounting groove; the floating adjusting component 6 comprises a floating spring 61 arranged in the mounting groove and a floating sleeve 62 sleeved on the outer wall of the middle part of the holding needle 31; each holding needle 31 is inserted into a mounting hole, and the bottoms of the two ends of the floating sleeve 62 on the outer wall of each holding needle 31 are respectively abutted against a floating spring 61; a plurality of guide shafts 7 are further arranged between the mounting plate 1 and the bearing seat 4, and the floating plate 3 is movably sleeved outside the guide shafts 7; a plurality of buffer springs 8 are connected between the floating plate 3 and the bearing seat 4; the first jacking mechanism 5 comprises a fixed plate 51 arranged below the mounting plate 1, a plurality of fixed columns 52 connected between the fixed plate 51 and the mounting plate 1, and a jacking cylinder 53 mounted on the fixed plate 51; the output shaft of the jacking cylinder 53 penetrates through the mounting plate 1 and is connected with the bottom of the floating plate 3.

The working principle of the utility model is as follows:

with reference to fig. 1 to 3, in this embodiment, a first limiting groove is further formed in the top of the bearing seat 4, a plurality of through holes are further formed in the first limiting groove at positions corresponding to the plurality of clasping pins 31, a product to be tested is placed in the first limiting groove, and pins of the product to be tested are inserted into the through holes, during testing, the clasping pins 31 are driven by the first jacking mechanism 5, and the top of the clasping pins penetrates through the through holes to clasp the pins of the product to be tested, and the working process of the present invention is as follows:

1) placing a product to be detected in the first limiting groove;

2) the jacking cylinder 53 drives the floating plate 3 to drive the plurality of holding needles 31 to ascend along the guide shaft 7 so that the holding needles 31 are in contact with pins of a product to be tested, and at the moment, the buffer spring 8 is in a compressed state;

3) if the clasping needle 31 and the pin of the product to be tested are deviated, the position of the clasping needle 31 can be adjusted in a self-adaptive manner through the floating spring 61 in the mounting hole, so that the clasping needle 31 clasps the pin of the product to be tested, and the contact stability between the clasping needle 31 and the pin of the product to be tested is further ensured;

4) after the test is finished, the jacking cylinder 53 retracts the output shaft, and the floating plate 3 drives the holding needle 31 to reset under the driving of the restoring force of the buffer spring 8, so that the holding needle 31 is separated from the pin of the product to be tested.

The present invention is not limited to the above preferred embodiments, and any modifications, equivalent substitutions and improvements made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A test fixture mechanism with a floating needle capable of being adjusted is characterized by comprising a mounting plate, a PCB fixedly mounted at the bottom of the mounting plate, a floating plate movably arranged at the top of the mounting plate, and a bearing seat arranged above the floating plate and used for placing a product to be tested; a first jacking mechanism is arranged below the mounting plate and is in driving connection with the floating plate; the floating plate is also provided with a plurality of holding needles, and the bottoms of the holding needles penetrate through the mounting plate and are connected with the PCB; the floating plate is also provided with a plurality of floating adjusting components, and each floating adjusting component and one holding pin are correspondingly arranged; the first jacking mechanism is used for driving the floating plate to drive the plurality of embracing needles to ascend, and the floating adjusting assembly is used for adjusting the positions of the embracing needles so that the embracing needles can embrace the pins of the product to be detected when the embracing needles contact the pins of the product to be detected.

2. The holding needle floating adjustment test fixture mechanism as claimed in claim 1, wherein the floating plate is provided with a plurality of mounting holes, and two mounting grooves are respectively arranged at two ends of each mounting hole; the floating adjusting component comprises a floating spring arranged in the mounting groove and a floating sleeve sleeved on the outer wall of the middle part of the holding needle; each holding needle is inserted in a mounting hole, and the bottoms of the two ends of the floating sleeve on the outer wall of each holding needle are respectively abutted against a floating spring.

3. The holding needle floating adjustable test fixture mechanism as claimed in claim 1, wherein a plurality of guide shafts are further installed between the mounting plate and the bearing seat, and the floating plate is movably sleeved outside the guide shafts.

4. The holding needle floating adjustable test fixture mechanism of claim 3, wherein a plurality of buffer springs are further connected between the floating plate and the bearing seat.

5. The holding needle floating adjustable test fixture mechanism as claimed in claim 1, wherein the first jacking mechanism comprises a fixed plate arranged below the mounting plate, a plurality of fixed columns connected between the fixed plate and the mounting plate, and a jacking cylinder mounted on the fixed plate; and an output shaft of the jacking cylinder penetrates through the mounting plate and is connected with the bottom of the floating plate.