Fine adjustment device of circuit board test frame

Abstract

The utility model discloses a fine tuning device of a circuit board test rack, comprising a fixed pedestal, the outer side of which is provided with a plurality of threading ports; the probe plate is connected to the inner side of the fixed base in a sliding mode, a plurality of detachable probes are fixedly installed on the inner side of the probe plate, the bottom ends of the probes are connected with lines, and the lines are led out from the threading openings; the pressure sensing assembly is arranged between the fixed base and the probe plate; the placing frame assembly is arranged at the top end of the fixed base; the circuit board is placed on the inner side of the top end of the placing frame assembly; the supporting frame is fixedly connected to the top end of the fixed base, and the supporting frame is in an L shape and is divided into a vertical plate and a horizontal plate; and the downward pressing assembly is arranged at the top end of the horizontal plate of the supporting frame. Compared with the prior art, the utility model has the advantages that the pressure when the probe is in contact with the circuit board can be monitored and adjusted, the probe is prevented from being damaged, and stable connection is kept.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of circuit board test, concretely to a fine adjustment device of circuit board test frame. BACKGROUND

[0002] Circuit board test frame is used to test the open short circuit condition of circuit board, all PCBs need to be tested after production to ensure 100% yield, and the circuit board needs to be contacted with the probe after positioning and installing on the placing plate for electrical test.

[0003] However, the patent under the prior art has the following shortcomings:

[0004] (1) The fine adjustment device of the existing utility model circuit board test frame lacks a pressure sensing component, and the probe is very easy to damage when contacting the circuit board due to unstable pressure adjustment, which requires frequent replacement of the probe and reduces the test efficiency. UTILITY MODEL CONTENTS

[0005] The technical problem to be solved by the utility model is to overcome the above technical defects, and provide a fine adjustment device of circuit board test frame which can monitor and adjust the pressure when the probe contacts the circuit board.

[0006] In order to solve the above problems, the technical scheme of the utility model is as follows: a fine adjustment device of circuit board test frame, comprising:

[0007] A fixed base is provided with a plurality of threading openings on the outside;

[0008] A probe plate is slidably connected to the inside of the fixed base, a plurality of detachable probes are fixedly installed on the inside of the probe plate, and the bottom end of the probe is connected with a wire which is led out from the threading opening;

[0009] A pressure sensing component is arranged between the fixed base and the probe plate, and the pressure sensing component comprises a pressure sensor, a connecting rod, a connecting ring, a supporting rod and a spring one, the pressure sensor is fixedly connected to the inside bottom end of the fixed base, the connecting rod is fixedly connected between the pressure sensors, the connecting ring is slidably connected to the outside of the connecting rod, the supporting rod is rotatably connected between the top end of the connecting ring and the bottom end of the probe plate, the spring one is sleeved on the outside of the connecting rod and fixedly connected between the connecting ring and the pressure sensor, the spring one is provided with a damper, and the damper can slow down the reciprocating rebound of the spring one;

[0010] A placing rack assembly is arranged at the top end of the fixed base;

[0011] A circuit board is placed on the inside of the top end of the placing rack assembly;

[0012] A support frame is fixedly connected to the top end of the fixed base, and the support frame is L-shaped and divided into a vertical plate and a horizontal plate;

[0013] A pressing assembly is arranged at the top end of the horizontal plate of the support frame.

[0014] Further, the placing rack assembly comprises:

[0015] A limiting shaft one is fixedly connected to the inner side of the limiting groove at the top end of the fixed base;

[0016] A connecting pipe is slidingly connected to the inner side of the limiting groove;

[0017] A spring two is sleeved on the outer side of the limiting shaft one and fixedly connected between the connecting pipe and the limiting groove, the spring two is provided with a damper, and the damper can slow down the reciprocating rebound of the spring two;

[0018] A placing rack is fixedly connected to the top end of the connecting pipe.

[0019] Further, the pressing assembly comprises:

[0020] A dust cover is fixedly connected to the top end of the horizontal plate of the support frame;

[0021] A motor is fixedly installed on the inner side of the dust cover, and a conical gear one is fixedly connected to one end of a motor drive shaft;

[0022] A conical gear two is rotatably connected to the inner side of a rotating groove arranged at the top end of the horizontal plate of the support frame, and a lead screw is fixedly connected to the bottom end of the conical gear two.

[0023] A limiting shaft two is fixedly connected to the bottom end of the horizontal plate of the support frame;

[0024] A lifting frame is slidingly connected to the outer side of the limiting shaft two, and the lifting frame is threadedly connected with the lead screw, and a rubber contact is fixedly connected to the bottom end of the lifting frame.

[0025] The utility model has the advantages that compared with the prior art, the utility model has the advantages that:

[0026] (1) The fine adjustment device of the circuit board test rack of the utility model is provided with a pressure sensing assembly, which can monitor the pressure when the probe contacts the circuit board and adjust it, so that the appropriate pressure between the probe and the circuit board is maintained, the probe is prevented from being damaged, the stability during electrical connection is ensured, subsequent testing is facilitated, and the testing efficiency is improved. BRIEF DESCRIPTION OF DRAWINGS

[0027] Figure 1The utility model relates to a kind of stereoscopic microadjustment device of circuit board test rack Figure 1 .

[0028] Figure 2 The utility model relates to a kind of sectional view of microadjustment device of circuit board test rack Figure 1 .

[0029] Figure 3 The utility model relates to a kind of sectional view of microadjustment device of circuit board test rack Figure 2 .

[0030] As shown in the figure: 1, fixed base; 2, probe plate; 3, probe; 4, pressure sensing assembly; 401, pressure sensor; 402, connecting rod; 403, connecting ring; 404, support rod; 405, spring one; 5, placing rack assembly; 501, limit slot; 502, limit shaft one; 503, connecting pipe; 504, spring two; 505, placing rack; 6, circuit board; 7, support frame; 8, pressing assembly; 801, dust cover; 802, motor; 803, conical gear one; 804, rotary groove; 805, conical gear two; 806, lead screw; 807, limit shaft two; 808, lifting frame; 809, rubber contact. DETAILED DESCRIPTION

[0031] The exemplary embodiments will be described in detail hereinbelow with reference to the drawings. In the following description, the same numbers refer to the same or similar elements throughout the drawings. The embodiments described in the following exemplary embodiments do not represent all the embodiments consistent with the present disclosure. Rather, they are merely examples of apparatuses consistent with some aspects of the present disclosure as detailed in the appended claims.

[0032] The technical solutions in the embodiments of the utility model will be described clearly and completely below with reference to the drawings in the embodiments of the utility model. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor belong to the scope of protection of the utility model.

[0033] Embodiment 1:

[0034] As Figures 1 to 3As shown, a fine adjustment device of a circuit board test rack comprises a fixed base 1, a plurality of threading openings are formed on the outer side of the fixed base 1; a probe plate 2 is slidably connected to the inner side of the fixed base 1, a plurality of detachable probes 3 are fixedly installed on the inner side of the probe plate 2, and the bottom end of each probe 3 is connected with a circuit which is led out from the threading opening; a pressure sensing assembly 4 is arranged between the fixed base 1 and the probe plate 2; a placing rack assembly 5 is arranged at the top end of the fixed base 1; a circuit board 6 is placed on the inner side of the top end of the placing rack assembly 5; a support frame 7 is fixedly connected to the top end of the fixed base 1, and the support frame 7 is L-shaped and comprises a vertical plate and a horizontal plate; and a pressing assembly 8 is arranged at the top end of the horizontal plate of the support frame 7.

[0035] The placing rack assembly 5 comprises a limiting shaft one 502, a connecting pipe 503, a spring two 504 and a placing rack 505, a limiting groove 501 is formed at the top end of the fixed base 1, the limiting shaft one 502 is fixedly connected to the inner side of the limiting groove 501, the connecting pipe 503 is slidably connected to the inner side of the limiting groove 501, the spring two 504 is sleeved on the outer side of the limiting shaft one 502 and is fixedly connected between the connecting pipe 503 and the limiting groove 501, the spring two 504 is provided with a damper, the damper can slow down the reciprocating rebound of the spring two 504, and the placing rack 505 is fixedly connected to the top end of the connecting pipe 503.

[0036] The circuit board 6 to be tested is placed on the top end of the placing rack 505, and the test is ready to be performed.

[0037] The pressing assembly 8 comprises a dust cover 801, a motor 802, a conical gear two 805, a limiting shaft two 807 and a lifting frame 808, the dust cover 801 is fixedly connected to the top end of the horizontal plate of the support frame 7, the motor 802 is fixedly installed on the inner side of the dust cover 801, one end of the driving shaft of the motor 802 is fixedly connected with the conical gear one 803, a rotating groove 804 is formed on the top end of the horizontal plate of the support frame 7, the conical gear two 805 is rotatably connected to the inner side of the rotating groove 804, the limiting shaft two 807 is fixedly connected to the bottom end of the horizontal plate of the support frame 7, the lifting frame 808 is slidably connected to the outer side of the limiting shaft two 807, the lifting frame 808 is threadedly connected with the lead screw 806, and the rubber contact 809 is fixedly connected to the bottom end of the lifting frame 808.

[0038] The motor 802 is started to drive the conical gear one 803 to rotate through the driving shaft of the motor 802, the conical gear one 803 drives the conical gear two 805 to rotate, the lead screw 806 is rotated, the lifting frame 808 which is limited by the limiting shaft two 807 is driven to descend, the lifting frame 808 drives the rubber contact to press and contact the circuit board 6, and the circuit board 6 drives the placing rack 505 to move downward.

[0039] The pressure sensing assembly 4 comprises a pressure sensor 401, a connecting rod 402, a connecting ring 403, a supporting rod 404 and a spring 405, the pressure sensor 401 is fixedly connected to the inner bottom end of the fixed base 1, the connecting rod 402 is fixedly connected between the pressure sensors 401, the connecting ring 403 is slidingly connected to the outer side of the connecting rod 402, the supporting rod 404 is rotatably connected between the top end of the connecting ring 403 and the bottom end of the probe plate 2, the spring 405 is sleeved on the outer side of the connecting rod 402 and fixedly connected between the connecting ring 403 and the pressure sensor 401, the spring 405 is provided with a damper, and the damper can slow down the reciprocating rebound of the spring 405.

[0040] The circuit board 6 continuously moves downward and contacts the probe 3 used for testing, drives the probe 3 and the probe plate 2 to move downward, the probe plate 2 moves downward to drive the supporting rod 404 to rotate, push the connecting ring 403 to slide on the outer side of the connecting rod 402, and extrude the spring 405, and the spring 405 transmits the pressure to the pressure sensor 401, when the pressure sensor 401 monitors the target pressure value, the pressure sensor 401 controls the motor 802 to be locked, so that the moderate pressure between the probe 3 and the tested circuit board 6 is maintained, the probe 3 is prevented from being damaged, and the stable connection of the probe is ensured, and the electrical test is facilitated.

[0041] After the test is completed, the motor 802 is started in reverse, the lifting frame 808 is raised and reset, the spring 405 and the spring 504 rebound, so that the probe plate 2 and the placing frame 505 are reset, and the spring 405 and the spring 504 are both provided with dampers, so that the spring 405 and the spring 504 rebound more stably, and the vibration of the placing frame 505 and the probe plate 2 during resetting is reduced.

[0042] The pressure sensor is a product on the market, and the connection mode and the control method are prior art, which will not be described here.

[0043] The electrical elements appearing in the text are all connected with the main controller and 220V mains electricity, and the main controller can be a conventional known device such as a computer, and the detailed description of the known functions and known components is omitted in the specific embodiment of the disclosure, in order to ensure the compatibility of the device, the operation means adopted is consistent with the parameters of the equipment on the market.

[0044] Although the embodiments of the utility model have been shown and described, it can be understood by those skilled in the art that various changes, modifications, replacements and variations can be made to these embodiments without departing from the principles and spirits of the utility model, and the scope of the utility model is defined by the appended claims and their equivalents.

Claims

1. A fine adjustment device for a circuit board test fixture, comprising: Include: Fixed base (1), the fixed base (1) outside is provided with multiple threading openings; Probe plate (2), the probe plate (2) is slidably connected to the inner side of the fixed base (1), a plurality of detachable probes (3) are fixedly installed on the inner side of the probe plate (2), and the probe (3) is connected with a line at the bottom end and the line is led out from the threading opening; Pressure sensing assembly (4), the pressure sensing assembly (4) is arranged between the fixed base (1) and the probe plate (2), the pressure sensing assembly (4) comprises: a pressure sensor (401), a connecting rod (402), a connecting ring (403), a supporting rod (404) and a spring (405), the pressure sensor (401) is fixedly connected to the inner bottom end of the fixed base (1), the connecting rod (402) is fixedly connected between the pressure sensor (401), the connecting ring (403) is slidably connected to the outer side of the connecting rod (402), the supporting rod (404) is rotatably connected between the top end of the connecting ring (403) and the bottom end of the probe plate (2), the spring (405) is sleeved on the outer side of the connecting rod (402) and fixedly connected between the connecting ring (403) and the pressure sensor (401), the spring (405) is provided with a damper, and the damper can slow down the reciprocating rebound of the spring (405); Placing rack assembly (5), the placing rack assembly (5) is arranged at the top end of the fixed base (1); Circuit board (6), the circuit board (6) is placed on the inner side of the top end of the placing rack assembly (5); Support frame (7), the support frame (7) is fixedly connected to the top end of the fixed base (1), and the support frame (7) is L-shaped and divided into a vertical plate and a horizontal plate; Downward pressing assembly (8), the downward pressing assembly (8) is arranged at the top end of the horizontal plate of the support frame (7).

2. The fine adjustment device of a circuit board test fixture according to claim 1, wherein: The placing rack assembly (5) comprises: Limiting shaft one (502), the fixed base (1) is provided with a limiting groove (501) at the top end of the four corners, and the limiting shaft one (502) is fixedly connected to the inner side of the limiting groove (501); Connecting pipe (503), the connecting pipe (503) is slidably connected to the inner side of the limiting groove (501); Spring two (504), the spring two (504) is sleeved on the outer side of the limiting shaft one (502) and fixedly connected between the connecting pipe (503) and the limiting groove (501), the spring two (504) is provided with a damper, and the damper can slow down the reciprocating rebound of the spring two (504); Placing rack (505), the placing rack (505) is fixedly connected to the top end of the connecting pipe (503).

3. The fine adjustment device of a circuit board test fixture according to claim 1, wherein: The downward pressing assembly (8) comprises: Dust cover (801), the dust cover (801) is fixedly connected to the top end of the horizontal plate of the support frame (7); Motor (802), the motor (802) is fixedly installed on the inner side of the dust cover (801), and one end of the motor (802) drive shaft is fixedly connected with a bevel gear one (803); Bevel gear two (805), the support frame (7) horizontal plate top is equipped with rotating groove (804), bevel gear two (805) is rotatably connected to the inner side of rotating groove (804), bevel gear two (805) bottom end is fixedly connected with lead screw (806); Limiting shaft two (807), the limiting shaft two (807) is fixedly connected to the bottom end of the horizontal plate of support frame (7); Lifting frame (808), the lifting frame (808) is slidably connected to the outer side of limiting shaft two (807), the lifting frame (808) is screwed with lead screw (806), and the bottom end of the lifting frame (808) is fixedly connected with a rubber contact.

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