Cam type lifting self-locking device

Abstract

A cam type lifting self-locking device belongs to the technical field of tool clamps, and comprises a probe plate, a guide rod, a connecting rod, a cam self-locking arm and a hinge seat, the left end and the right end of the probe plate are symmetrically punched and provided with linear bearings, the periphery of the guide rod is sleeved with a reset spring, and the guide rod penetrates through the linear bearings and extends out of the probe plate; hinge holes are formed in the cam self-locking arms and the hinge seats, hinge shafts penetrate through the hinge holes to connect the cam self-locking arms and the hinge seats, the two symmetrical cam self-locking arms are arranged, and the connecting rods are fixed between the two cam self-locking arms through the connecting rod holes; a screw penetrates through a counter bore in the bottom plate to fix the hinge seat on the vertical face of the tool clamp, the guide rod is installed on the plane of the tool clamp through a threaded installation hole in the bottom of the guide rod, and the probe plate is located below the hinge seat. The device can simplify the step of fixing the probe board, improve the detection efficiency of the circuit board, and improve the production efficiency of an enterprise.

Description

Technical Field

[0001] The utility model belongs to the technical field of tooling fixtures, and in particular relates to a cam type lifting self-locking device. Background Art

[0002] Generally, before batch production of electronic equipment, a batch of tooling and fixtures matching the electronic equipment to be produced will be made to test the electronic equipment circuit boards before assembly. Circuit board tooling and fixtures mostly appear in the form of plugs, probes, etc. The probe-shaped process tooling and fixtures need to first fix the circuit board to be tested, and then move the probe board to make the probes on the probe board effectively contact the test points on the circuit board one by one. After effective contact, the probe board needs to be fixed before power can be turned on for testing to detect whether the circuit board is a qualified product.

[0003] Common ways to fix the probe board in the process tooling fixture are clips or rotating sliders. These fixing methods require manual lowering of the probe board to effectively contact the circuit board, and then manual use of the clips or rotating sliders to fix the probe board in effective contact with the circuit board before power-on testing can be performed. After the test is completed, the clips or rotating sliders need to be manually opened and the probe board needs to be raised to remove the tested circuit board. The entire testing process is relatively time-consuming, and when the number of circuit boards to be tested is large, production efficiency is seriously affected. Utility Model Content

[0004] In order to simplify the fixing method of the probe plate and improve the detection efficiency of the circuit board, the utility model proposes a cam type lifting self-locking device.

[0005] A cam-type lifting self-locking device, characterized in that it includes a probe plate, a guide rod, a connecting rod, a cam self-locking arm and a hinge seat, the left and right ends of the probe plate have symmetrical openings and linear bearings are arranged in the openings, a reset spring is sleeved on the outer periphery of the guide rod, a mounting thread is arranged at the bottom of the guide rod, the top of the guide rod passes through the linear bearing and extends to the probe plate, and the probe plate can slide up and down along the guide rod; the cam self-locking arm is composed of a cam head and an arm handle, the arm handle is tilted downward after being connected to the cam head, and a plurality of connecting rod holes are opened at the tail of the arm handle, the outer side surface of the cam head is an arc surface, and transitions to a plane at the bottom surface, and a hinge hole is opened at the top of the cam head The articulated seat is composed of a base plate and an articulated plate. A hinge hole identical to that on the top of the arm head is provided on the articulated seat. The articulated plate is fixed at the center line of the base plate and is perpendicular to the base plate. Countersunk holes are symmetrically provided on the base plate along the articulated plate. The articulated shaft passes through the cam self-locking arm and the articulated seat articulated hole to connect the two. Two symmetrical cam self-locking arms are provided, and the connecting rod is fixed between the two cam self-locking arms through the connecting rod hole. The articulated seat is fixed to the vertical surface of the fixture by screws passing through the countersunk holes on the base plate, and the guide rod is installed on the plane of the fixture through the mounting threads at its bottom, and the probe plate is located below the articulated seat.

[0006] Further, the number of the connecting rods is two.

[0007] The beneficial effects of the present utility model are as follows: when the connecting rod is stressed downward, it drives the cam self-locking arm to rotate around the hinge shaft, and the sliding of the probe board is realized through the variable-diameter cam of the cam self-locking arm. After the cam arc surface ends, the plane at the end of the cam arc surface contacts and coincides with the upper surface of the probe board. At the same time, the return spring provides a vertically upward force to realize the position self-locking of the probe board. After the detection is completed, an upward force is provided to the connecting rod to realize the upward sliding of the probe board to reset the device. This device can simplify the steps of fixing the probe board, improve the detection efficiency of the circuit board, and improve the production efficiency of the enterprise. Description of the Drawings

[0008] Figure 1 It is an exploded view of the structure of a cam-type lifting self-locking device.

[0009] Figure 2 It is an initial state diagram of a cam-type lifting self-locking device.

[0010] Figure 3 It is a state diagram when a cam-type lifting self-locking device is in use.

[0011] Figure 4 It is a schematic diagram of the structure of the cam self-locking arm.

[0012] Wherein: guide rod 1, return spring 2, probe board 3, linear bearing 4, hinge shaft 5, hinge seat 6, connecting rod 7, cam self-locking arm 8, cam head 81, arm handle 82, hinge hole 83. Detailed Embodiments

[0013] Embodiment 1: A cam-type lifting self-locking device is installed on an L-shaped mounting plate provided on a tooling fixture for detecting circuit boards. The device includes a probe board 3, a guide rod 1, a connecting rod 7, a cam self-locking arm 8, and a hinge seat 6. The left and right ends of the probe board 3 are symmetrically drilled and linear bearings 3 are provided in the drilled holes. Probes for detecting circuit boards are installed on the bottom surface of the probe board 3. A return spring 2 is sleeved on the outer periphery of the guide rod 1. The bottom of the guide rod 1 is provided with mounting threads. The top of the guide rod 1 passes through the linear bearing 4 and extends above the probe board 3. The probe board 3 can slide up and down along the guide rod 1 and is limited by the return spring 2. The cam self-locking arm 8 is composed of a cam head 81 and an arm handle 82. The arm handle 82 is connected to the cam head 81 and slopes downward. Two connecting rod holes are spaced apart at the tail of the arm handle 82. The outer side surface of the cam head 81 is an arc surface and transitions to a plane at the bottom surface. A hinge hole 83 is opened at the top of the cam head 81. The hinge seat 6 is composed of a bottom plate and a hinge plate. The hinge plate is fixed at the midline of the bottom plate and is perpendicular to the bottom plate. A hinge hole is opened on the hinge plate. Counterbores are symmetrically opened on the bottom plate along the hinge plate. A hinge shaft 5 passes through the hinge holes on the cam self-locking arm 8 and the hinge seat 6 to connect the two. Two symmetric cam self-locking arms 8 are provided, and the connecting rod 7 is fixed between the two cam self-locking arms 8 through the connecting rod holes. A total of two connecting rods 7 are provided. The hinge seat is fixed on the vertical surface of the mounting plate of the tooling fixture by screws passing through the counterbores on the bottom plate, and the guide rod 1 is fixed on the plane of the mounting plate by its bottom mounting threads, and the probe board 3 is located below the hinge seat 6.

Claims

1. A cam-type lifting self-locking device, characterized in that: It includes a probe board, a guide rod, a connecting rod, a cam self-locking arm and a hinge seat. Symmetrical holes are opened at the left and right ends of the probe board, and linear bearings are arranged in the holes. A return spring is sleeved on the outer periphery of the guide rod. An installation thread is provided at the bottom of the guide rod. The top of the guide rod passes through the linear bearing and extends above the probe board. The probe board can slide up and down along the guide rod. The cam self-locking arm consists of a cam head and an arm handle. The arm handle is connected to the cam head and slopes downward. A number of connecting rod holes are opened at the tail of the arm handle. The outer side surface of the cam head is an arc surface and transitions to a plane at the bottom surface. A hinge hole is opened at the top of the cam head. The hinge seat consists of a bottom plate and a hinge plate. A hinge hole identical to the top of the arm head is opened on the hinge seat. The hinge plate is fixed at the midline of the bottom plate and is perpendicular to the bottom plate. Counterbored holes are symmetrically opened on the bottom plate along the hinge plate. A hinge shaft passes through the hinge holes on the cam self-locking arm and the hinge seat to connect the two. Two symmetrical cam self-locking arms are provided, and the connecting rod is fixed between the two cam self-locking arms through the connecting rod holes. The hinge seat is fixed on the vertical surface of the tooling fixture by screwing a screw through the counterbored hole on the bottom plate, and the guide rod is installed on the plane of the tooling fixture through the installation thread at its bottom, and the probe board is located below the hinge seat.

2. The cam-type lifting self-locking device according to claim 1, characterized in that The number of the connecting rods provided is two.

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