Micro-current and voltage sampling device

Abstract

The utility model relates to the field of circuit measurement and control devices, in particular to a micro-current and voltage sampling device, which comprises an upper shell and a lower shell which are symmetrically connected, the sections of the upper shell and the lower shell are U-shaped, and the upper shell and the lower shell are cylindrical after being connected; the front baffle and the rear baffle are symmetrically connected to the two ends of the upper shell and the two ends of the lower shell to jointly form a cavity, and the main control circuit board is arranged in the cavity. An upper connecting plate and a lower connecting plate which protrude towards the interior of the cavity are arranged at the connecting position of the upper shell and the lower shell respectively, buckles are arranged at the two ends of the front baffle and the two ends of the rear baffle respectively, the buckles are clamped on the connecting plates and the lower connecting plate at the same time, and preassembling of the upper shell and the lower shell is achieved. The buckles are arranged on the front baffle and the rear baffle, the upper shell and the lower shell are pre-fixed through connection of the buckles and the upper clamping grooves and the lower clamping grooves when the upper shell and the lower shell are assembled with the front baffle and the rear baffle, the influence of follow-up assembly on the positions of the upper shell and the lower shell is avoided, and then the assembly efficiency and the assembly precision are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of circuit measurement and control devices, in particular to a micro-current and voltage sampling device. Background Art

[0002] In the fields of semiconductor testing equipment, optics, nuclear, electron beam and other high-end instrumentation, it is necessary to accurately measure weak electrical signals. The existing micro-voltage and current sampling devices need to be provided with heat dissipation fins and other structures on the inner side of the upper and lower shells during assembly, and the shells are relatively thin and it is difficult to provide corresponding clamping or locking devices. Therefore, when other parts are assembled after the upper and lower shells are assembled, it is easy to interfere with the upper and lower shells, affecting the relative position of the upper and lower shells, and affecting the subsequent assembly efficiency and assembly accuracy. Therefore, how to improve the assembly accuracy and efficiency of the micro-current and voltage sampling device is a problem that technicians in this field need to consider. Utility Model Content

[0003] The utility model aims to provide a micro-current and voltage sampling device to solve the problems of sampling device assembly accuracy and efficiency in the prior art.

[0004] The technical solution of the utility model is: a micro-current voltage sampling device, comprising an upper shell and a lower shell connected symmetrically, wherein the cross-sections of the upper shell and the lower shell are both U-shaped and are cylindrical after being connected; a front baffle and a rear baffle are symmetrically connected at both ends of the upper shell and the lower shell to form a cavity together, and a main control circuit board is arranged in the cavity;

[0005] An upper connecting plate and a lower connecting plate protruding into the cavity are respectively provided at the connection between the upper shell and the lower shell, and buckles are provided at both ends of the front baffle and the rear baffle. The buckles are clamped on the connecting plate and the lower connecting plate at the same time to realize the pre-installation of the upper shell and the lower shell.

[0006] Preferably, an upper clamping groove and a lower clamping groove are respectively provided on the sides of the upper connecting plate and the lower connecting plate which are away from each other, and when the buckle is connected, the caliper is in the upper clamping groove and the lower clamping groove at the same time.

[0007] Preferably, a first protective plate is connected to a side of the front baffle away from the upper shell and the lower shell, and the first protective plate is connected to the upper shell and the lower shell by a plurality of bolts penetrating the front baffle.

[0008] Preferably, a second protective plate is connected to a side of the rear baffle away from the upper shell and the lower shell, and the second protective plate is connected to the upper shell and the lower shell by a plurality of bolts penetrating the rear baffle.

[0009] Preferably, windows are provided on both the front baffle and the rear baffle, and an input port is provided on the main control circuit board, and the input port extends through the windows.

[0010] Preferably, the upper shell and the lower shell are made of aluminum alloy.

[0011] Compared with the prior art, the advantages of the utility model are:

[0012] (1) By providing buckles on the front baffle and the rear baffle, the upper and lower shells are pre-fixed by connecting the buckles with the upper and lower slots when the upper and lower shells are assembled with the front and rear baffles, thereby avoiding the influence of subsequent assembly on the position of the upper and lower shells, thereby improving the assembly efficiency and assembly accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] The utility model is further described below in conjunction with the accompanying drawings and embodiments:

[0014] Figure 1 This is a structural schematic diagram of the micro-current and voltage sampling device of the utility model;

[0015] Figure 2 This is a schematic diagram of the explosion structure of the micro-current and voltage sampling device of the utility model;

[0016] Figure 3 for Figure 2 A schematic diagram of the enlarged structure at A in the middle;

[0017] Figure 4 for Figure 2 Schematic diagram of the enlarged structure at B.

[0018] Among them: upper shell 1, cavity 1a, upper connecting plate 11, upper card slot 111, lower shell 2, lower connecting plate 21, lower card slot 211, front baffle 3, window 31, rear baffle 4, main control circuit board 5, input port 51, first protective plate 6, second protective plate 7, buckle 8. DETAILED DESCRIPTION

[0019] The following is a further detailed description of the present invention in conjunction with specific embodiments:

[0020] like Figure 1-4As shown, a micro-current voltage sampling device includes an upper shell 1 and a lower shell 2 that are symmetrically connected, and both the upper shell 1 and the lower shell 2 can be made of aluminum alloy. The cross-sections of the upper shell 1 and the lower shell 2 are both U-shaped, and they are cylindrical after being connected; the front baffle 3 and the rear baffle 4 are symmetrically connected at both ends of the upper shell 1 and the lower shell 2 to form a cavity 1a together, and the main control circuit board 5 is arranged in the cavity 1a. A first protective plate 6 is connected to the side of the front baffle 3 away from the upper shell 1 and the lower shell 2, and the first protective plate 6 is connected to the upper shell 1 and the lower shell 2 through a plurality of bolts penetrating the front baffle 3. A second protective plate 7 is connected to the side of the rear baffle 4 away from the upper shell 1 and the lower shell 2, and the second protective plate 7 is connected to the upper shell 1 and the lower shell 2 through a plurality of bolts penetrating the rear baffle 4. In this embodiment, the main control circuit board 5 is installed on the upper shell 1 or the lower shell 2 by screws or other fixing methods; the main control circuit board 5 is connected to multiple input ports 51, such as a power supply interface, a current input port, a voltage input port, etc. The multiple input ports 51 extend out of the cavity 1a through the window 31 set on the front baffle 3 or the rear baffle 4 to facilitate connection with the outside world.

[0021] The connection between the upper shell 1 and the lower shell 2 is respectively provided with an upper connecting plate 11 and a lower connecting plate 21 protruding into the cavity 1a, and buckles 8 are provided at both ends of the front baffle 3 and the rear baffle 4. The buckles 8 are clamped on the upper connecting plate 11 and the lower connecting plate 21 at the same time to realize the pre-installation of the upper shell 1 and the lower shell 2. The upper connecting plate 11 and the lower connecting plate 21 are respectively provided with an upper clamping groove 111 and a lower clamping groove 211 on the side away from each other. When the buckles 8 are connected, the clamps are simultaneously in the upper clamping groove 111 and the lower clamping groove 211. In this embodiment, during assembly, the upper shell 1 and the lower shell 2 are first buckled together, and then the front baffle 3 and the rear baffle 4 are installed; when installing the front baffle 3 and the rear baffle 4, the buckle 8 is pushed inward along the length direction of the upper slot 111 and the lower slot 211, and the buckle 8 is just clamped on the upper slot 111 and the lower slot 211 at the same time, and the temporary fixed installation of the upper shell 1 and the lower shell 2 is completed; then the first protective plate 6 and the second protective plate 7 are installed. During installation, the first protective plate 6 or the second protective plate 7 and the front baffle 3 or the rear baffle 4 are sequentially penetrated by bolts, and finally connected with the upper shell 1 or the lower shell 2 by threads. At this time, the front and rear baffles 4 can be fixed to the upper and lower shells 2, and the input port 51 on the main control circuit board 5 extends out of the window.

[0022] The above embodiments are only for illustrating the technical concept and features of the utility model, and their purpose is to enable people familiar with this technology to understand the content of the utility model and implement it accordingly, and they cannot be used to limit the protection scope of the utility model. For those skilled in the art, it is obvious that the utility model is not limited to the details of the above exemplary embodiments, and the utility model can be implemented in other specific forms without departing from the spirit or basic features of the utility model. Therefore, no matter from which point of view, the embodiments should be regarded as exemplary and non-restrictive. The scope of the utility model is limited by the attached claims rather than the above description, so it is intended to include all changes within the meaning and scope of the equivalent elements of the claims in the utility model.

Claims

1. A micro-current and voltage sampling device, characterized in that: It comprises an upper shell and a lower shell that are symmetrically connected, wherein the cross-sections of the upper shell and the lower shell are both U-shaped and are cylindrical after being connected; a front baffle and a rear baffle are symmetrically connected at both ends of the upper shell and the lower shell to form a cavity together, and a main control circuit board is arranged in the cavity; An upper connecting plate and a lower connecting plate protruding into the cavity are respectively provided at the connection between the upper shell and the lower shell, and buckles are provided at both ends of the front baffle and the rear baffle. The buckles are clamped on the connecting plate and the lower connecting plate at the same time to realize the pre-installation of the upper shell and the lower shell.

2. A micro-current and voltage sampling device according to claim 1, characterized in that: An upper clamping groove and a lower clamping groove are respectively arranged on the sides of the upper connecting plate and the lower connecting plate which are away from each other. When the buckle is connected, the caliper is in the upper clamping groove and the lower clamping groove at the same time.

3. A micro-current and voltage sampling device according to claim 1, characterized in that: A first protective plate is connected to a side of the front baffle away from the upper shell and the lower shell. The first protective plate is connected to the upper shell and the lower shell by a plurality of bolts penetrating the front baffle.

4. A micro-current and voltage sampling device according to claim 3, characterized in that: A second protective plate is connected to a side of the rear baffle away from the upper shell and the lower shell. The second protective plate is connected to the upper shell and the lower shell by a plurality of bolts penetrating the rear baffle.

5. A micro-current and voltage sampling device according to claim 1, characterized in that: The front baffle and the rear baffle are both provided with windows, and the main control circuit board is provided with an input port, which extends through the windows.

6. A micro-current and voltage sampling device according to claim 1, characterized in that: The upper shell and the lower shell are made of aluminum alloy.

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