Linkage structure of a test fixture

Abstract

The present invention discloses a connecting rod structure of a test fixture, comprising: a base, a fixture arranged on the base, a support frame and a lower pressing plate. Two guide columns penetrating the lower pressing plate are respectively arranged on both sides of the fixture. Two rotating blocks are respectively rotatably connected to both ends of the lower pressing plate. A cross bar is inserted between the two rotating blocks. Both ends of the cross bar respectively penetrate the support frame, one end is rotatably connected to the side plate of the support frame, and the other end is fixedly connected to a push-pull handle. A roller and a limiting block are respectively fixed on two inner side surfaces of the side plate of the support frame. A claw portion cooperating with the roller is formed by inward depression of the lower half portion of the rotating block, and a limiting portion cooperating with the limiting block is formed by inward depression of the side surface of the rotating block. The connecting rod design of the present invention is smooth during the process of pressing down the push handle, and there will be no phenomenon of being stuck during pressing down, avoiding the phenomenon that the product on the fixture is damaged due to excessive pressing down stroke.

Description

Technical Field

[0001] The present invention relates to the technical field of electronic industry test equipment, and particularly to a connecting rod structure of a test fixture. Background Art

[0002] When the connecting rod used in the previous test fixture is in use, the following problems will occur: Since the force application points of the previous connecting rod design are on the cross bar, the force on the left and right two force application points on the cross bar is unbalanced. When the right hand presses down, due to the moment, the force on the right force application point is greater than the force on the left force application point. In the long term, it will cause the cross bar to press down unevenly left and right. Due to the unbalanced left and right forces, the structural parts at the left and right two force application points of the cross bar will be severely worn. After the structural parts are severely worn, the process of the connecting rod pressing down will be blocked, and the situation of being unable to press down will occur. Moreover, due to the wear of the structural parts, metal debris will fall below the connecting rod, causing difficulties in maintenance. Summary of the Invention

[0003] The main technical problem to be solved by the present invention is to provide a connecting rod structure of a test fixture, which can keep the left and right forces balanced during the process of the connecting rod pressing down, has less wear at the structural part of the force application point, and the pressing down process is relatively smooth.

[0004] To solve the above technical problem, a technical solution adopted by the present invention is: A connecting rod structure of a test fixture, comprising: a base, a fixture provided on the base, a frame-shaped support frame erected above the base, and a lower pressing plate provided between the support frames. Two guide columns penetrating the lower pressing plate are respectively provided on both sides of the fixture. Two rotating blocks are respectively rotatably connected to both ends of the lower pressing plate. A cross bar is inserted between the two rotating blocks. Both ends of the cross bar respectively penetrate the support frame, one end is rotatably connected to the side plate of the support frame, and the other end is fixedly connected to a push-pull hand. A roller and a limit block are respectively fixed on the two inner side surfaces of the side plate of the support frame. A claw portion cooperating with the roller is formed by the lower half of the rotating block being recessed inward, and a limit portion cooperating with the limit block is formed by the side surface of the rotating block being recessed inward.

[0005] In a preferred embodiment of the present invention, the roller is in contact with the claw portion, and the rotating block can rotate around the roller.

[0006] In a preferred embodiment of the present invention, the roller is fixedly installed on the side plate of the support frame through a bearing.

[0007] In a preferred embodiment of the present invention, both ends of the lower pressing plate are arranged inside the two rotating blocks through a rotating shaft.

[0008] In a preferred embodiment of the present invention, the limit portion is a square notch cooperating with the limit block and is located on the back of the claw portion.

[0009] The beneficial effects of the present invention are as follows: During the process of the linkage mechanism of the present invention driving the lower pressing plate to press down, the wear is relatively small, the movement is relatively smooth, and the phenomenon of jamming during the downward pressing will not occur; The phenomenon that the products fixed on the fixture are damaged on the surface due to excessive downward pressing stroke is avoided; The maintenance efficiency of the fixture is greatly improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings, where:

[0011] Figure 1 is a schematic structural diagram of the linkage structure of a test fixture of the present invention;

[0012] Figure 2 is a side view of the linkage structure of a test fixture of the present invention;

[0013] Figure 3 is a partial structural diagram of the linkage structure of the present invention. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0014] The following will clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only some of the embodiments of the present invention, rather than all of them. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present invention.

[0015] Please refer to Figures 1 - 3 , a linkage structure of a test fixture of the present invention, including: a base 1, a fixture 2 arranged on the base, a frame-shaped support frame 3 erected above the base, and a lower pressing plate 4 arranged between the support frames. A detection probe 5 for detecting products inside the fixture is installed on the lower surface of the lower pressing plate. Two guide columns 12 penetrating the lower pressing plate are respectively arranged on both sides of the fixture. Two rotating blocks 6 are respectively rotatably connected to both ends of the lower pressing plate. Specifically, both ends of the lower pressing plate are installed inside the two rotating blocks through a rotating shaft. The two rotating blocks are respectively arranged on the inner side surfaces of the support frames. A cross bar 7 inserted between the two rotating blocks is connected. Both ends of the cross bar respectively penetrate the side plates 31 of the support frame. One end of the cross bar is rotatably fixed on the side plate of the support frame through a small rotating shaft, and the other end is fixedly connected to a push and pull handle 8. Specifically, the push and pull handle includes a handle fixing block 81. The other end of the cross bar is inserted into the handle fixing block to form a linkage whole with the push and pull handle. A roller 9 and a limit block 10 are respectively fixed on the two inner side surfaces of the side plate 31 of the support frame.

[0016] Furthermore, the lower half of the rotating block 6 is recessed inward to form a claw portion 61 that cooperates with the roller, and the side surface of the rotating block is recessed inward to form a limiting portion 62 that cooperates with the limiting block. Specifically, the limiting portion is a square notch that cooperates with the limiting block and is located on the back of the claw portion. The setting of the limiting portion can prevent the product surface from being damaged due to excessive downward pressing stroke of the lower pressing plate.

[0017] Furthermore, the two rollers 9 are respectively fixedly installed on the side plates of the support frames on both sides through bearings 11. The structure in which the rollers cooperate with the claw portion for sliding can reduce the friction of the contact surface. At the same time, there is a bearing inside the roller, and the balls inside can reduce the friction force. In this way, the wear of the entire mechanism will be reduced a lot, so the lower pressing surface will not get stuck during the downward pressing process.

[0018] During operation, first fix the positions of the rollers and the limiting blocks according to the requirements of the product to be tested. Push the push handle downward. The push handle drives the two rotating blocks to rotate through the cross bar. At this time, the rollers are in contact with the inner side surfaces of the claw portions of the rotating blocks. The two rotating blocks can rotate around the two rollers, and then drive the lower pressing plate connected to the side surface of the rotating block to move downward along the guide post. The connecting rod structure of the present invention makes the force application points concentrated on the rollers on both sides of the connecting rod, rather than on the cross bar. The setting of the rollers can reduce the friction of the contact surface and reduce the wear of the entire mechanism a lot. Therefore, the entire lower pressing plate is not likely to get stuck during the downward pressing process. In addition, the setting of the limiting block can further limit the rotation angle of the rotating block to prevent the operator from applying too much force during the downward pressing stroke and causing damage to the product to be tested.

[0019] The beneficial effects of the connecting rod structure of a test fixture of the present invention are as follows:

[0020] (1) During the process of driving the lower pressing plate to press downward, the connecting rod mechanism of the present invention has less wear, is relatively smooth, and will not get stuck during downward pressing;

[0021] (2) It avoids the phenomenon that the product fixed on the fixture is damaged due to excessive downward pressing stroke;

[0022] (3) Greatly improves the maintenance efficiency of the fixture.

[0023] The above are only the embodiments of the present invention, and thus do not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made by using the content of the specification of the present invention, or directly or indirectly applied in other related technical fields, shall be equally included in the patent protection scope of the present invention.

Claims

1. A connecting rod structure of a test fixture, characterized in that, it includes: a base, a fixture arranged on the base, a frame-shaped support frame erected above the base, and a lower pressing plate arranged between the support frames. Two guide columns penetrating the lower pressing plate are respectively arranged on both sides of the fixture. Two rotating blocks are respectively rotatably connected to both ends of the lower pressing plate. A cross bar is inserted between the two rotating blocks. Both ends of the cross bar respectively penetrate the support frame, one end is rotatably connected to the side plate of the support frame, and the other end is fixedly connected to a push-pull hand. A roller and a limit block are respectively fixed on the two inner side surfaces of the side plate of the support frame. A claw portion cooperating with the roller is formed by inward depression of the lower half of the rotating block, and a limit portion cooperating with the limit block is formed by inward depression of the side surface of the rotating block. The roller is in contact with the claw portion, and the rotating block can rotate around the roller. The roller is fixedly installed on the side plate of the support frame through a bearing. Both ends of the lower pressing plate are arranged inside the two rotating blocks through a rotating shaft.

2. The connecting rod structure of a test fixture according to claim 1, characterized in that, the limit portion is a square notch cooperating with the limit block and is located on the back surface of the claw portion.

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