A light-weight device for collecting electroencephalogram of rats and mice

Abstract

The utility model belongs to medical mechanical experiment technical field especially is a kind of light rat brain electric acquisition device, including socket, the top of socket is equipped with multiple sockets, the inside of multiple socket is separately provided with elastic sleeve piece, the far side of multiple elastic sleeve piece is fixedly connected with contact lever respectively, the right side of socket front and back two ends is equipped with mounting groove respectively, the inside of two mounting groove is separately provided with fixed component, the bottom of socket front and back two sides is fixedly connected with multiple hexagonal pin respectively, two fixed components include fixed foot respectively, the left side of fixed foot is fixedly connected with limit block. The utility model passes through socket, hexagonal pin, elastic sleeve piece, contact lever, has solved the problem of inconvenient fixation of too small needle foot, and due to enough close winding fixation, can greatly reduce the amount of soldering tin, and non-professional welding personnel can also ensure that short circuit between circuit does not occur.

Description

Technical Field

[0001] This utility model relates to the field of medical mechanical experimental technology, specifically a lightweight electroencephalogram (EEG) acquisition device for mice and rats. Background Technology

[0002] Collecting electroencephalograms (EEGs) data from rats and mice is a common procedure in animal experiments. The electrode interface connected to the electrical signal acquisition device is a crucial component for EEG acquisition. Traditionally, this connection to the cranial screw and the electrical signal acquisition device is achieved by soldering leads using DuPont wire connectors. Currently, commercially available custom-made electrodes are available, but they are expensive and have long lead times, making them inconvenient for experimental use.

[0003] The existing technology has the following defects or problems: The existing technology, with publication number CN215305794U, discloses a device for testing auditory cognition and electroencephalographic activity in mice, belonging to the field of medical experimental technology. This invention directly links abnormal behavior in experimental animals with neuronal electrical activity to deeply explore the neuropathological mechanism of lupus encephalopathy. This invention includes a fixing device and a turntable. The fixing device has one end of a cold-pressed terminal ring fixed to it, and the other end of the cold-pressed terminal ring is embedded in the side of the mouse's head. The mouse is placed on the turntable. Recording electrodes and reference electrodes are also provided inside the mouse's head. The recording electrodes and the reference electrodes are connected to a common connector. The connector is connected to a head-end amplifier, which is connected to an electroencephalogram (EEG) recorder. The EEG recorder is connected to a computer. The computer is also connected to a water supply module, an infrared camera, a photoelectric sensor, and an acoustic-optical control microcontroller. The acoustic-optical control microcontroller is connected to a sound-emitting part and a light-emitting part.

[0004] The aforementioned devices, during use, cannot solve the problem of inconvenient fixation due to excessively small pins, leading to unstable contact, increased signal noise, and reduced EEG data quality. Furthermore, fixing delicate components is time-consuming and labor-intensive, potentially damaging fragile tissues. In some existing EEG acquisition devices for mice and rats, the DuPont wire connectors are relatively large, causing significant foreign body sensation when fixed to the animal's skull, resulting in difficulty in movement and even frequent scratching leading to dislodgement.

[0005] It should be noted that the above content falls within the inventor's technical knowledge and does not necessarily constitute prior art. Utility Model Content

[0006] To address the shortcomings of existing technologies, this invention provides a lightweight electroencephalogram (EEG) acquisition device for mice and rats, solving the current problems.

[0007] To achieve the above objectives, this utility model provides the following technical solution: a lightweight mouse and rat electroencephalogram (EEG) acquisition device, comprising a socket, the top of which has multiple insertion ports, each of which has an elastic sleeve inside, and a contact rod fixedly connected to the opposite side of each of the multiple elastic sleeves. The right side of the socket has mounting grooves at both the front and rear ends, and two mounting grooves have fixing components inside. The bottom ends of the front and rear sides of the socket are fixedly connected to multiple hexagonal pins.

[0008] As a preferred embodiment of this utility model, each of the two fixing components includes a fixing foot, and a limit block is fixedly connected to the left side of the fixing foot.

[0009] As a preferred embodiment of this utility model, the socket is made of polybutylene terephthalate.

[0010] As a preferred embodiment of this invention, the surface of the hexagonal pin is plated with a silver layer.

[0011] As a preferred embodiment of this utility model, the outer surfaces of the plurality of elastic sleeves respectively contact the inner walls of the plurality of sockets, and the bottom ends of the plurality of contact rods respectively contact the top ends of the front and rear sides of the socket.

[0012] As a preferred embodiment of this utility model, the outer left side of the two fixed feet respectively contacts the inner walls of the front and rear ends of the right side of the socket.

[0013] As a preferred embodiment of this utility model, the inner walls of the two limiting blocks are respectively fixedly connected to the outer left side of the two fixing feet, and the left side of the two limiting blocks is in contact with the right side of the socket.

[0014] Compared with the prior art, this utility model provides a lightweight electroencephalogram (EEG) acquisition device for rats and mice, which has the following beneficial effects:

[0015] 1. A lightweight electroencephalogram (EEG) acquisition device for rats and mice, comprising a socket, T-shaped pins, an elastic sleeve, and a contact rod. During electrode insertion, the elastic sleeve deforms due to compression, tightly wrapping the electrode wire to secure it firmly. The electrode wire makes good contact with the contact rod, ensuring smooth transmission of EEG signals. Silver wires are soldered to the four corner T-shaped pins, with the positive and negative terminals diagonally soldered and the ground wire soldered to the other diagonal. In use, the positive and negative silver wires are wound around positive and negative cranial nails, and the ground wire is wound around a grounding cranial nail. Corresponding plugs are used to connect to the positive and negative terminals and the ground wire of the signal acquisition device to achieve signal acquisition. The T-shaped pins facilitate winding the silver wire electrodes, solving the problem of inconvenient fixation due to small pins. Furthermore, the tight winding and fixation greatly reduces the amount of solder used, ensuring that even non-professional soldering personnel will not cause short circuits between circuits.

[0016] 2. A lightweight electroencephalogram (EEG) acquisition device for rats and mice, comprising an installation groove, a fixed foot, and a limiting block. A screw is inserted into the skull through a pre-drilled hole on the right side of the fixed foot and the socket. When the screw is tightened, the fixed foot is pulled outward, but it cannot move further inward due to the obstruction of the limiting block. The left side of the limiting block contacts the outer wall of the right side of the socket, forming a physical limit, thereby preventing the fixed foot from excessively retracting inward and causing the socket to deform. Attached Figure Description

[0017] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0018] Figure 2 This is a schematic diagram of the hexagonal pin structure of this utility model;

[0019] Figure 3 This is a schematic diagram of the elastic sleeve structure of this utility model;

[0020] Figure 4 This is a schematic diagram of the fixed foot structure of this utility model.

[0021] In the diagram: 1. Socket; 2. Outlet; 3. Elastic sleeve; 4. Contact rod; 5. Mounting slot; 6. Hexagonal pin; 7. Fixing foot; 8. Limit block. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0023] Example 1

[0024] Please see Figure 1-4 In this embodiment: a lightweight mouse and rat electroencephalogram (EEG) acquisition device includes a socket 1 made of polybutylene terephthalate (PET). The top of the socket 1 has multiple sockets 2, each with an elastic sleeve 3 inside. The outer surfaces of the elastic sleeves 3 contact the inner walls of the sockets 2. Contact rods 4 are fixedly connected to opposite sides of the elastic sleeves 3. The bottom ends of the contact rods 4 contact the tops of the front and rear sides of the socket 1. Mounting grooves 5 are provided at the front and rear ends of the right side of the socket 1. Fixing components are installed inside the two mounting grooves 5. Multiple hexagonal pins 6 are fixedly connected to the bottom ends of the front and rear sides of the socket 1. The surfaces of the hexagonal pins 6 are plated with a silver layer.

[0025] In this embodiment, firstly, the electrode wire with electrodes is inserted into the socket 2 at the top of the socket 1. During the insertion process, the elastic sleeve 3 will undergo elastic deformation due to compression, tightly wrapping the electrode wire to achieve a firm fixation. The electrode wire makes good contact with the contact rod 4, ensuring that the EEG signal can be transmitted smoothly. Next, the socket 1 is installed in a suitable position on the head of the mouse or rat using the fixing component, so that the electrode is in close contact with the scalp of the mouse or rat brain, ensuring that the weak electrical signals generated by the activity of brain neurons can be effectively collected. The electrical signal is transmitted to the contact rod 4 through the electrode wire, and then conducted to the socket 1 through the contact rod 4. Finally, silver wires are soldered to the four corners of the socket 1 through the hexagonal pins 6. The positive and negative electrodes are soldered diagonally, and the ground wire is soldered to the other diagonal. In use, the positive and negative silver wires are wrapped around the positive and negative cranial nails respectively, and the ground wire is wrapped around the grounding cranial nail. The corresponding plugs are connected to the positive and negative terminals and the ground wire of the signal acquisition device to achieve the purpose of signal acquisition.

[0026] Example 2

[0027] like Figure 1 - Figure 4 As shown, the two fixing components each include a fixing foot 7. The outer left side of the two fixing feet 7 is in contact with the inner wall of the front and rear ends of the right side of the socket 1. The left side of the fixing foot 7 is fixedly connected to a limiting block 8. The inner wall of the two limiting blocks 8 is fixedly connected to the outer left side of the two fixing feet 7. The left side of the two limiting blocks 8 is in contact with the right side of the socket 1.

[0028] In this embodiment, the device is placed at the target position on the animal's head. A screw is screwed into the skull through the pre-drilled holes on the right side of the fixing foot 7 and the socket 1. When the screw is tightened, the fixing foot 7 is pulled outwards, but is blocked by the limiting block 8 and cannot move further inwards. At this time, the left side of the limiting block 8 contacts the outer wall of the right side of the socket 1, forming a physical limit. The limiting block 8, through contact with the outer wall of the socket 1, balances the tension of the screw, preventing the fixing foot 7 from excessively retracting and causing deformation of the socket 1. The fixing foot 7 and the limiting block 8 are made of lightweight, high-strength materials, reducing the overall weight of the device and minimizing interference with the animal's activities.

[0029] The working principle and usage process of this utility model: The device uses a two-row, three-column socket 1, with silver wires soldered to the four corner pins respectively. The positive and negative terminals are soldered diagonally, and the ground wire is soldered to the other diagonal. When in use, the positive and negative silver wires are wrapped around the positive and negative terminal nails respectively, and the ground wire is wrapped around the grounding terminal nail. The corresponding IC plugs are used to connect to the positive and negative terminals and the ground wire of the signal acquisition device to achieve the purpose of signal acquisition. The pins of the socket 1 are cut with a U-shaped groove to facilitate the winding of silver wires. It can be firmly fixed without professional soldering, avoiding short circuits between lines caused by excessive solder joints.

[0030] Finally, it should be noted that the above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A lightweight electroencephalogram (EEG) acquisition device for rats and mice, characterized in that: The socket (1) includes a socket (1) with multiple sockets (2) at its top. Each socket (2) has an elastic sleeve (3) inside. Each elastic sleeve (3) has a contact rod (4) fixedly connected to the opposite side of each elastic sleeve (3). The socket (1) has mounting grooves (5) at its front and rear ends on its right side. Each mounting groove (5) has a fixing component inside. The socket (1) has multiple hexagonal pins (6) fixedly connected to the bottom of its front and rear sides.

2. The lightweight rat and mouse EEG acquisition device according to claim 1, characterized in that: The two fixing components each include a fixing foot (7), and a limit block (8) is fixedly connected to the left side of the fixing foot (7).

3. The lightweight mouse and rat EEG acquisition device according to claim 1, characterized in that: The socket (1) is made of polybutylene terephthalate.

4. The lightweight rat and mouse EEG acquisition device according to claim 1, characterized in that: The surface of the hexagonal pin (6) is plated with a silver layer.

5. A lightweight electroencephalogram (EEG) acquisition device for rats and mice according to claim 1, characterized in that: The outer surfaces of the multiple elastic sleeves (3) respectively contact the inner walls of the multiple sockets (2), and the bottom ends of the multiple contact rods (4) respectively contact the top ends of the front and rear sides of the socket (1).

6. A lightweight electroencephalogram (EEG) acquisition device for rats and mice according to claim 2, characterized in that: The left outer sides of the two fixed feet (7) respectively contact the inner walls of the front and rear ends of the right side of the socket (1).

7. A lightweight electroencephalogram (EEG) acquisition device for rats and mice according to claim 2, characterized in that: The inner walls of the two limiting blocks (8) are respectively fixedly connected to the left outer side of the two fixing feet (7), and the left side of the two limiting blocks (8) is in contact with the right side of the socket (1).

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