Parallel dual-electrode needle

Abstract

The utility model relates to the technical field of electrode needles, in particular to a parallel double-electrode needle which comprises a needle seat, built-in holes are formed in the needle seat and distributed along the two sides of the center of the needle seat, the electrode needles are arranged in the built-in holes in a penetrating and attaching mode, and each electrode needle comprises a plastic shell, a glass tube and a copper core. And the outer ring wall of the plastic shell and the inner wall of the built-in hole are arranged in a sliding and sleeving mode, the outer ring wall of the glass tube and the inner wall of the plastic shell are bonded and fixed through resin glue, a copper core is connected into the glass tube in a penetrating and sleeving mode, and the copper core and the glass tube are fixedly assembled through a screw. Through the needle seat structure, two adjacent electrode needles can be arranged side by side in parallel, and through mutual threaded movement of the threaded knob and the threaded sleeve, the threaded knob can drive the extrusion pad to extrude the plastic shell parts of the electrode needles, so that the position stability of the electrode needles is ensured, and the parallel arrangement position correspondence is ensured.

Description

TECHNICAL FIELD

[0001] The utility model relates to electrode needle technical field especially relates to a parallel double electrode needle. BACKGROUND

[0002] Parallel double electrode needle is a device commonly used in physical, chemical and biological experiments, mainly used for electrochemical measurement, current stimulation, cell injection and other experimental operations.

[0003] It is composed of two parallel arranged slender electrodes, usually these electrodes are metal wires or glass tubes embedded with metal wires, the tip part can be very fine, in order to accurately contact the sample or tissue.

[0004] Its main application fields are:

[0005] Electrochemical measurement: in electrochemical research, parallel double electrode needle can be used to measure the current and voltage in electrolyte solution, so as to study the dynamics and mechanism of electrochemical reaction;

[0006] Current stimulation: in neuroscience and cell biology, current stimulation is carried out using parallel double electrode needle to study the response of cells to electrical signals, such as the excitability of neurons;

[0007] Cell injection: in molecular biology and cell biology experiments, intracellular injection such as DNA, RNA or drug injection is carried out using double electrode needle;

[0008] Microelectrode array: in some advanced biosensors and microfluidic devices, parallel double electrode needle can be used as part of microelectrode array for high-throughput biomolecular detection.

[0009] At present, in some electrode test, generally will adopt double electrode needle structure, most cases double electrode needle is set apart, if using process, need parallel adjustment, simply through two hands operation, it is difficult to reach stable parallel setting, therefore, need to design a parallel structure of double electrode needle, to satisfy the demand of parallel operation. Utility model content

[0010] The utility model relates to a parallel double electrode needle for solving the above-mentioned shortcomings in the prior art.

[0011] In order to realize the above-mentioned purpose, the utility model adopts the following technical scheme:

[0012] The utility model provides a parallel double electrode needle, including the needle holder, the inside of needle holder is provided with built -in hole, and built -in hole is arranged along the both sides of the center position of needle holder, the inside of built -in hole is through the adiaphorous setting of electrode needle, electrode needle includes plastic shell, glass tube and copper core, the outer ring wall of plastic shell is with the inner wall of built -in hole sliding sleeve joint setting, the outer ring wall of glass tube is through resin glue and the inner wall of plastic shell bonding fixed, the inside of glass tube is through the sleeve of copper core, and copper core is fixed assembly through screw and glass tube, the outside of plastic shell is provided with wiring terminal, and wiring terminal is fixed contact setting through plastic shell and glass tube with copper core respectively, the inner wall of built -in hole is through the setting of screw sleeve, and screw sleeve and the link position of needle holder are bonded fixed through resin glue, the inside screw of screw sleeve is provided with screw knob, the other end of screw knob is provided with extrusion pad made of rubber material, and extrusion pad and screw knob are bonded fixed through resin glue, and the other side of extrusion pad is tightly extruded with the outer wall of plastic shell.

[0013] In detail, the upper end of the needle holder is provided with a limiting frame in the middle position, the limiting frame is a T-shaped structure, and the lower ends of the two lateral sides are tightly arranged on the top of the plastic shell.

[0014] In detail, the vertical lower end of the limiting frame is provided with a clamping groove, and the upper end of the needle holder is provided with an elastic clamp which is fixedly assembled with the surface of the needle holder by a screw, and the surface of the elastic clamp is clamped with the inner part of the clamping groove.

[0015] In detail, the shape of the elastic clamp and the shape of the groove are both regular hexagons, and the elastic clamp is made of rubber material.

[0016] In detail, the front and back surfaces of the needle holder are both provided with a thumb ring, and the end part of the thumb ring is an integral structure with the surface of the needle holder.

[0017] In detail, the needle holder and the thumb ring are both made of polyvinyl chloride material, and the surface is covered with a polyurethane coating.

[0018] In detail, the end part of the copper core is a circular arc type, and the shape is a cylindrical copper wire or a thin copper rod structure.

[0019] The design scheme of the utility model has the following beneficial effects in the application process:

[0020] 1. Through the needle holder structure, the two adjacent electrode needles can be arranged in parallel, the threaded movement of the screw knob and the screw sleeve enables the screw knob to extrude the plastic shell part of the electrode needle with the extrusion pad, ensures the position stability of the electrode needle, and ensures the position correspondence of the parallel arrangement.

[0021] 2. By the limiting frame structure, the electrode needle can be limited and supported at one end when arranged in parallel and side by side, so that the end of the electrode needle can be flush. BRIEF DESCRIPTION OF DRAWINGS

[0022] Figure 1 It is a whole structure schematic view of the utility model;

[0023] Figure 2 It is a whole overhead structure schematic view of the utility model;

[0024] Figure 3 It is a front structure schematic view of the utility model;

[0025] Figure 4 It is an enlarged schematic view of a of the utility model;

[0026] Figure 5 It is a thumb ring distribution schematic view of the utility model.

[0027] In the drawing: 10, needle seat; 11, built-in hole; 12, plastic shell; 13, threaded sleeve; 14, threaded knob; 15, extrusion pad; 16, glass tube; 17, copper core; 18, terminal; 20, limiting frame; 21, clamping groove; 22, elastic card; 30, thumb ring. DETAILED DESCRIPTION

[0028] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all the embodiments.

[0029] REFERENCE Figures 1-5The utility model provides a parallel double electrode needle, including needle seat 10, the inside of needle seat 10 is provided with built-in hole 11, and built-in hole 11 is arranged along the both sides of the center position of needle seat 10, and the inside of built-in hole 11 is provided with electrode needle through the fit, and electrode needle includes plastic shell 12, glass tube 16 and copper core 17, the outer circle wall of plastic shell 12 is slidably connected with the inner wall of built-in hole 11, the outer circle wall of glass tube 16 is fixedly connected with the inner wall of plastic shell 12 by resin glue, the inside of glass tube 16 is provided with copper core 17 through the sleeve, and copper core 17 is fixedly assembled with glass tube 16 through screw, the outside of plastic shell 12 is provided with wiring terminal 18, and wiring terminal 18 is fixedly contacted with copper core 17 through plastic shell 12 and glass tube 16 respectively, the inner wall of built-in hole 11 is provided with threaded sleeve 13 through, and threaded sleeve 13 is fixedly connected with the connection position of needle seat 10 by resin glue, the inside of threaded sleeve 13 is provided with screw knob 14 through the thread, and the other end of screw knob 14 is provided with extrusion pad 15 made of rubber material, and extrusion pad 15 is fixedly connected with screw knob 14 through resin glue, and the other side of extrusion pad 15 is tightly extruded with the outer wall of plastic shell 12.

[0030] Further need to explain is that the middle position of the upper end of needle seat 10 is provided with limiting frame 20, limiting frame 20 is T-shaped structure, and the lower end of the lateral both sides is tightly arranged with the top of plastic shell 12 respectively, limiting frame 20 can be positioned when the two electrode needles are arranged in parallel.

[0031] Further need to explain is that the vertical lower end of limiting frame 20 is provided with clamping groove 21, and the upper end of needle seat 10 is provided with elastic card 22, which is fixedly assembled with the surface of needle seat 10 through screw, and the surface of elastic card 22 is clamped with the inside of clamping groove 21, which can facilitate the installation and disassembly of limiting frame 20 and needle seat 10.

[0032] Further need to explain is that the shape of elastic card 22 and the shape of the groove of clamping groove 21 are both regular hexagons, and elastic card 22 is made of rubber material, to ensure the clamping stability of elastic card 22 and clamping groove 21 and the convenience of disassembly.

[0033] Further need to explain is that the front and back of needle seat 10 are provided with thumb ring 30, and the end of thumb ring 30 is an integral structure with the surface of needle seat 10, which can be positioned locally when the thumb penetrates through thumb ring 30 when the fingers hold needle seat 10, to ensure the stability of hand holding.

[0034] Further need to explain is that needle seat 10 and thumb ring 30 are both made of polyvinyl chloride material, and the surface is covered with polyurethane coating, which has good antiskid wear-resistant effect, so that slipping can be avoided when the needle seat 10 is held and operated.

[0035] It is further needed to be explained that the end of the copper core 17 is arc-shaped, and the copper core 17 is in the structure of cylindrical copper wire or thin copper rod, which contacts the sample or tissue and performs precise electric stimulation.

[0036] Working mode: when two electrode needles need to be arranged in parallel, first, the limiting frame 20 is butted against the needle seat 10, the elastic clamps 22 and the clamping grooves 21 are clamped with each other, the fixing of the limiting frame 20 and the needle seat 10 can be realized, then, the ends of the electrode needles are inserted into and penetrate the inside of the built-in hole 11, the ends of the two electrode needles are flush with the surface of the limiting frame 20, then, the threaded knob 14 is rotated, the threaded knob 14 and the threaded sleeve 13 are threadedly moved with each other, the contact of the extrusion pad 15 and the plastic shell 12 can be realized, and the fastening of the position of the electrode needles and the needle seat 10 can be realized.

[0037] The above is only the preferred specific implementation mode of the present application, but the protection scope of the present application is not limited to this, any skilled person in the art can make equivalent replacement or change according to the technical scheme and the inventive concept of the present application within the technical range disclosed by the present application, which should be covered in the protection scope of the present application.

Claims

1. A parallel dual-electrode needle, comprising a needle holder (10), characterized in that: The needle holder (10) has an internal hole (11) inside, and the internal holes (11) are distributed on both sides of the center position of the needle holder (10). An electrode needle is inserted and fitted inside the internal hole (11). The electrode needle includes a plastic shell (12), a glass tube (16), and a copper core (17). The outer ring wall of the plastic shell (12) is slidably sleeved with the inner wall of the internal hole (11). The outer ring wall of the glass tube (16) is bonded and fixed to the inner wall of the plastic shell (12) with resin glue. The copper core (17) is inserted and fitted inside the glass tube (16), and the copper core (17) is fixedly assembled with the glass tube (16) by screws. The outer ring wall of the plastic shell (12) is slidably sleeved with the inner wall of the internal hole (11). The part is provided with a terminal block (18), and the terminal block (18) passes through the plastic shell (12) and the glass tube (16) respectively and is fixedly contacted with the copper core (17). A threaded sleeve (13) is provided through the inner wall of the built-in hole (11), and the connection position of the threaded sleeve (13) and the needle seat (10) is fixed by resin glue. The threaded sleeve (13) is provided with a threaded knob (14) in the internal thread. The other end of the threaded knob (14) is provided with a rubber extrusion pad (15), and the extrusion pad (15) is fixed to the threaded knob (14) by resin glue. The other side of the extrusion pad (15) is pressed tightly against the outer wall of the plastic shell (12).

2. The parallel dual-electrode needle according to claim 1, characterized in that: A limit frame (20) is provided at the middle position of the upper end of the needle holder (10). The limit frame (20) has a T-shaped structure, and the plastic shells (12) on the lower ends of the two sides are respectively attached to the top.

3. A parallel dual-electrode needle according to claim 2, characterized in that: The vertical end of the limiting frame (20) is provided with a slot (21), and the upper end of the needle seat (10) is provided with an elastic clip (22). The elastic clip (22) is fixedly assembled with the surface of the needle seat (10) by screws, and the surface of the elastic clip (22) is engaged with the inside of the slot (21).

4. A parallel dual-electrode needle according to claim 3, characterized in that: The elastic card (22) and the groove (21) are both hexagonal in shape, and the elastic card (22) is made of rubber material.

5. A parallel dual-electrode needle according to claim 1, characterized in that: The needle holder (10) is provided with a thumb ring (30) on both the front and back sides, and the end of the thumb ring (30) is integral with the surface of the needle holder (10).

6. A parallel dual-electrode needle according to claim 5, characterized in that: Both the needle hub (10) and the thumb ring (30) are made of polyvinyl chloride and have a polyurethane coating on their surfaces.

7. A parallel dual-electrode needle according to claim 1, characterized in that: The end of the copper core (17) is arc-shaped, and its shape is a cylindrical copper wire or thin copper rod structure.

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