CN212416671U - Electrode sealing device - Google Patents

Abstract

The utility model relates to an electrode sealing device, which comprises an electrode shell, a clamping block and a waterproof structure; the electrode shell is provided with an inner hole extending axially, one end of the inner hole is opened, and the other end of the inner hole is blocked; the clamping block is arranged in the inner hole and provided with a through hole extending axially, and the through hole is communicated with the inner hole; the waterproof structure is arranged in the inner hole and positioned on at least one side of the clamping block; wherein: the clamping block is configured to deform when subjected to an external force to allow the electrode to be inserted into the electrode shell through the through hole; the clamping block is also configured to clamp the electrode through the through hole after the external force is removed, so that the electrode is fixed relative to the electrode sealing device. The utility model discloses can seal when the electrode near-end buries subcutaneously, and electrode sealing device's simple structure, sealed convenient operation, water-proof effects is good moreover, and the size of whole device is little simultaneously, and the patient uses comfortablely.

Description

Electrode sealing device

Technical Field

The utility model relates to the technical field of medical equipment, in particular to electrode sealing device.

Background

Parkinson's disease is a common nervous system degenerative disease, and is common in the elderly, with an average onset age of about 60 years. The most important pathological change of Parkinson's disease is the degenerative death of mesencephalic nigral Dopamine (DA) neurons, which causes a marked reduction in striatal DA content and causes disease. Parkinson's disease mainly presents with resting tremor, bradykinesia, gait disturbance of posture and the like, which can cause great influence on the life of patients.

With the development of modern medical science and technology, the Parkinson's disease can be effectively improved by stimulating the subthalamic nucleus or the internal nucleus of the globus pallidus by using the electrodes. The Deep Brain Stimulation (DBS) system used is shown in fig. 1 and includes a pulse generator (generally abbreviated as IPG)1, an extension lead 2 and an electrode 3. When a patient has symptoms of resting tremor, gait disturbance, etc. on one side of the body (only the left or right side of the body), it is usually necessary to implant 1 pulse generator, 1 extension lead 2 and 1 electrode 3. If the patient's symptoms appear bilaterally, it is usually necessary to implant 1 pulse generator, 2 extension leads 2 and 2 electrodes 3, as shown in fig. 1. The electrode 3 is generally implanted into the brain by about 10cm, the rest of the electrode is embedded under the skin of the head, the other end of the electrode is placed behind the ear and connected with a subcutaneous extension lead 2, and the extension lead 2 is connected with the pulse generator 1. The pulse generator 1 generates an electrical signal that is transmitted to the electrodes 3 via the subcutaneous extension leads 2 to the target area of the brain.

In the operation process, the confirmation of the brain target point is very critical, and after the electrode 3 is implanted, CT or MR scanning is needed to confirm whether the implantation position of the electrode 3 is accurate. Before scanning, the proximal end (i.e. the end not implanted into the brain) of the electrode 3 needs to be sealed and protected, buried under the scalp, and then the scalp needs to be sutured. The conventional sealing operation is shown in fig. 2 as fig. a to f:

firstly, in fig. 2(a), an electrode protection sleeve 6 is threaded on an electrode 3; then in fig. 2(b), the electrode cap 7 is fitted over the proximal end of the electrode 3; then in fig. 2(c), the electrode cap 7 is locked by using the set screw 8, for example, as shown in fig. 2(f), the electrode cap 7 is provided with a screw fixing block 71 at a position shown by reference numeral 70, and the set screw 8 is locked with the screw fixing block 71; next, in fig. 2(d), the electrode sheath 6 is moved and fitted over the electrode cap 7; finally, in fig. 2(e), the two ends of the electrode sheath 6 are tied using surgical thread 9 to protect and seal the electrode 3.

Then, the above sealing operation has the following problems:

firstly, the parts are various, the operation is complex, and the operation time is prolonged to a certain extent;

secondly, the electrode cap 7 is locked on the electrode 3 by the fastening screw 8, and the fastening screw 8 is made of metal and has higher hardness, so that the electrode 3 can be damaged in the screwing process;

thirdly, the electrode cap 7 needs to be embedded with a thread fixing block 71 in advance, and because the electrode cap 7 is soft in material, the thread fixing block 71 usually rotates along with the set screw 8 in the process of screwing the set screw 8, so that the electrode 3 can be damaged;

fourthly, the two ends of the electrode protective sleeve 6 need to be tightened by the operation wire 9 for water prevention, the wire tying effect completely depends on manual operation, the subjectivity is high, the wire tying reliability is difficult to guarantee, for example, the wire can not play a role in sealing when being too loose, and the wire can damage the electrode 3 when being too tight.

Therefore, there is a need for a new electrode sealing device, which can reduce the number of parts, simplify the sealing operation, reduce the operation time, avoid the damage to the electrode, and improve the waterproof effect.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide an electrode sealing device has simplified the sealed structure of electrode, has also simplified the sealed operation of electrode, has shortened operation time, can avoid damaging the electrode in the operation process moreover, and water-proof effects is also good simultaneously, and the size of whole device is little, and the patient uses comfortablely.

In order to achieve the purpose, the utility model provides an electrode sealing device which comprises an electrode shell, a clamping block and a waterproof structure; the electrode shell is provided with an inner hole extending axially, one end of the inner hole is opened, and the other end of the inner hole is blocked; the clamping block is arranged in the inner hole, the clamping block is provided with a through hole extending axially, and the through hole is communicated with the inner hole; the waterproof structure is arranged in the inner hole and positioned on at least one side of the clamping block;

wherein: the clamping block is configured to deform when subjected to an external force to allow an electrode to be inserted into the electrode shell through the through hole; the clamping block is further configured to clamp the electrode through the through hole after the external force is removed, so that the electrode is fixed relative to the electrode sealing device.

Optionally, the electrode shell includes a body, and a positioning portion is disposed on an outer surface of the body corresponding to the clamping block; when the positioning part is acted by external force, the clamping block is deformed, so that the size of the through hole is enlarged, and the electrode is allowed to pass through the through hole.

Optionally, the clamping block is an elliptical cylinder, and the positioning portions are arranged corresponding to two ends of a long axis of the elliptical cylinder; when the positioning part is acted by external force, the short axis of the elliptic cylinder is increased, so that the size of the through hole is increased.

Optionally, the body of the electrode shell is cylindrical, the positioning portion includes two first planes symmetric with respect to the axis of the electrode shell, and the two first planes are tangential to the body and arranged in parallel.

Optionally, the outer surface of the body is further provided with a second plane, the second plane is adjacent to the two first planes, and the two first planes and the second plane are arranged around the axis of the electrode shell.

Optionally, the second plane is perpendicular to both the first planes, and the second plane is flush with the outer surface of the body.

Optionally, the waterproof structure includes a first waterproof structure disposed between the clamping block and the opening.

Optionally, waterproof construction still includes second waterproof construction and third waterproof construction, press from both sides tight piece setting and be in first waterproof construction with between the second waterproof construction, the second waterproof construction sets up press from both sides tight piece with between the third waterproof construction.

Optionally, the waterproof structure is an annular protrusion formed on an inner surface of the inner hole, and an inner diameter of the annular protrusion is smaller than a diameter of the electrode.

Optionally, a protrusion or a groove is formed on an inner wall of the through hole.

Optionally, the electrode shell is connected with the clamping block through a secondary injection molding process.

Optionally, the length of the clamping block is less than the length of the inner bore, and the clamping block is disposed adjacent to the opening of the inner bore.

Optionally, the clamping block is made of stainless steel, polyether-ether-ketone or polyurethane, and the electrode shell is made of a medical polymer material.

The utility model provides an electrode sealing device has following advantage:

firstly, the electrode sealing device of the utility model only needs to be provided with the electrode shell and the clamping block, and the clamping block is arranged in the electrode shell and realizes the fixation of the electrode relative to the electrode sealing device by a clamping mode, thus the structure is simple, the number of parts is small, the sealing operation of the electrode is simple, and the operation time can be effectively shortened;

secondly, the electrode sealing device of the utility model does not need to adopt a set screw to lock the electrode cap on the electrode, thereby avoiding the damage to the electrode when the set screw is locked in the prior art, in addition, the traditional electrode cap needs to be waterproof by binding the two ends of the electrode protective sleeve through the operation line, the reliability of the binding line is difficult to guarantee, and the electrode can be damaged due to the over-tight binding line, and the electrode sealing device of the utility model uses an internal waterproof structure to prevent water, thereby avoiding the influence of human factors during the sealing operation, therefore, the waterproof reliability is good, and the damage to the electrode can be avoided;

third, the utility model discloses an electrode sealing device processing is convenient, can effectual reduction in production cost and processing cost, and is very special, because waterproof construction set up in the inside of electrode shell and with electrode shell integrated into one piece, reduced electrode sealing device's size, when the electrode near-end was implanted subcutaneously, the patient used comfortablely.

Drawings

Those skilled in the art will appreciate that the drawings are provided for a better understanding of the invention and do not constitute any limitation on the scope of the invention. In the drawings:

FIG. 1 is a schematic view of a prior art DBS system implanted entirely on the cranial crown when the patient's symptoms appear bilateral;

FIG. 2 is a schematic diagram of a prior art sealing operation of an electrode;

FIG. 3 is a schematic view of the structure of the electrode casing of the electrode sealing device according to the preferred embodiment of the present invention;

FIG. 4 is a schematic view of the clamping block of the electrode sealing device according to the preferred embodiment of the present invention;

FIG. 5 is a schematic view of the assembly of the electrode seal assembly in a preferred embodiment of the invention;

fig. 6 is a schematic diagram of the sealing operation of the electrodes in the preferred embodiment of the present invention;

FIG. 7 is a transverse cross-sectional view of a clamping block in a preferred embodiment of the invention, wherein the clamping block has an arcuate protrusion formed on the interior thereof;

FIG. 8 is a transverse cross-sectional view of a clamping block in a preferred embodiment of the invention, wherein the clamping block is formed with wave-shaped protrusions on the inside;

fig. 9 is a schematic diagram of an electrode case with a clamping block embedded therein obtained by secondary injection molding in the preferred embodiment of the present invention.

The same or similar reference numbers in the drawings identify the same or similar elements.

Detailed Description

The following description of the embodiments of the present invention is provided for illustrative purposes, and other advantages and effects of the present invention will be readily apparent to those skilled in the art from the disclosure herein. The present invention can also be implemented or applied through other different specific embodiments, and various details in the present specification can be modified or changed based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that the drawings provided in the present embodiment are only for illustrating the basic idea of the present invention, and the drawings only show the components related to the present invention rather than being drawn according to the number, shape and size of the components in actual implementation, and the form, quantity and proportion of each component in actual implementation may be changed at will, and the layout of the components may be more complicated.

Furthermore, each embodiment described below has one or more technical features, which does not mean that all technical features of any embodiment need to be implemented simultaneously by a person using the present invention, or that all technical features of different embodiments can be implemented separately. In other words, in the implementation of the present invention, based on the disclosure of the present invention, and depending on design specifications or implementation requirements, a person skilled in the art can selectively implement some or all of the technical features of any embodiment, or selectively implement a combination of some or all of the technical features of a plurality of embodiments, thereby increasing the flexibility in implementing the present invention.

To make the objects, advantages and features of the present invention clearer, the present invention will be described in further detail with reference to the accompanying drawings. It should be noted that the drawings are in simplified form and are not to precise scale, and are provided for convenience and clarity in order to facilitate the description of the embodiments of the present invention. As used in this specification, the singular forms "a," "an," and "the" include plural referents unless the content clearly dictates otherwise. As used in this specification, the meaning of "a plurality" generally includes two or more unless the content clearly dictates otherwise. As used in this specification, the term "or" is generally employed in its sense including "and/or" unless the content clearly dictates otherwise. The term "axial" generally refers to a direction parallel to the axis of the electrode cap, and "transverse" generally refers to a direction perpendicular to the axis.

Furthermore, in the following description, numerous specific details are set forth in order to provide a more thorough understanding of the present invention. It will be apparent, however, to one skilled in the art, that the present invention may be practiced without one or more of these specific details. In other instances, well-known features have not been described in order to avoid obscuring the present invention.

The embodiment of the utility model provides an electrode cap, figure 3 is the structure schematic diagram of the electrode shell of electrode sealing device in the preferred embodiment of the utility model, figure 4 is the structure schematic diagram of the tight piece of clamp of electrode sealing device in the preferred embodiment of the utility model, figure 5 is the equipment schematic diagram of the electrode sealing device in the preferred embodiment of the utility model.

As shown in fig. 3 to 5, the present embodiment relates to an electrode sealing device (or electrode cap) which can be used for an implanted extension lead for DBS (deep brain stimulation), or other implanted extension leads, such as spinal nerve stimulation, vagus nerve stimulation, etc.

Specifically, the electrode sealing device comprises an electrode shell 10 and a clamping block 20. The electrode housing 10 has an axially extending inner bore 11, which bore 11 is open at one end for insertion of the electrode 3 (see fig. 6) and closed at the other end for waterproofing, i.e. the inner bore 11 is configured as a blind bore. The clamping block 20 is fixed in the inner bore 11 of the electrode shell 10, and the length (axial dimension) of the clamping block 20 is generally smaller than the length of the inner bore 11, so that the clamping block 20 is arranged in a section of the inner bore 11, the clamping block 20 preferably being arranged adjacent to the opening of the inner bore 11. And the clamping block 20 has an axially extending through bore 21 communicating with the internal bore 11.

Wherein the clamping block 20 is configured to be deformable, thereby changing the size of the through hole 21 (i.e., the minimum size of the through hole), facilitating penetration of the electrode 3 and clamping the electrode 3 after penetration of the electrode 3. More specifically, the clamping block 20 deforms when subjected to an external force to allow the electrode 3 to be inserted into the electrode case 10 through the through hole 21; when the clamping block 20 is released from the external force, the electrode 3 can be clamped again through the through hole 21, so that the electrode 3 is fixed relative to the electrode sealing device. In addition, a waterproof structure is further arranged in the inner hole 11 of the electrode shell 10, is positioned on at least one side of the clamping block 20, and plays a waterproof role in preventing external liquid from entering the electrode shell 10 to influence the electrode 3.

As shown in fig. 4, the clamping block 20 is preferably an elliptical cylinder, i.e. the cross-sectional shape of the clamping block 20 is elliptical (i.e. outer elliptical) and the cross-sectional shape of the through hole 21 is also elliptical (i.e. inner elliptical). The oval-shaped benefit is that the damage to the electrode 3 is little in the clamping process, the deformation direction and the size are easy to control, the clamping operation is convenient, the clamping effect is good, the structure is simple, and the processing is also convenient. In other embodiments, the clamping block 20 may have other regular or irregular shapes, and the cross-sectional shape of the clamping block 20, especially the cross-sectional shape of the through hole 21, is not particularly limited.

Next, assuming that the clamping block 20 is an elliptical cylinder, the use of the electrode sealing device of the present invention will be described in detail, but the present invention should not be limited thereto.

First, as shown in fig. 6 (a), pressure can be manually applied to both sides of the electrode shell 10 (i.e., force F is applied to both sides), so that the clamping block 20 is deformed under the pressure from the oval shape shown in fig. 6 (b) to the circular shape or the nearly circular shape shown in fig. 6 (d); then, as shown in fig. 6 (c), the electrode 3 is inserted into the electrode case 10, and after the electrode 3 is inserted, as shown in fig. 6 (d), the minor axis length of the elliptical through hole 21 is greater than the diameter of the electrode 3, so that the electrode 3 is not clamped; finally, as shown in fig. 6 (e), the pressing is stopped, and the clamping block 20 is returned to the oval shape (as shown in fig. 6 (f)), so as to clamp the electrode 3. It should be appreciated that after the electrode 3 is inserted into the electrode shell 10, the waterproof structure can deform and be in interference fit with the electrode 3 to achieve a waterproof effect.

Therefore, the electrode sealing device of the utility model has simple structure, small number of parts (namely only the electrode shell 10 and the clamping block 20 are configured), simple sealing operation and effectively shortened operation time. And the utility model discloses an electrode sealing device need not adopt holding screw to lock the electrode cap on the electrode, has avoided among the prior art the damage to the electrode when lock solid holding screw. In addition, the traditional electrode cap needs to be waterproof by tightening two ends of the electrode protective sleeve through the surgical thread, the reliability of the binding thread is difficult to guarantee, and the electrode can be damaged due to the over-tightening of the binding thread. And the utility model discloses an electrode sealing device uses inside waterproof construction to carry on waterproofly, the influence of human factor when having avoided sealed operation, consequently, waterproof reliability is good, also can avoid damaging the electrode simultaneously. Furthermore, the utility model discloses an electrode sealing device processing is convenient, can effectual reduction in production cost and processing cost, and is special, with waterproof construction setting in the inside of electrode shell and with the preferred integrated into one piece of electrode shell, reduced electrode sealing device's size, when the electrode near-end was implanted subcutaneously, the patient used comfortablely.

Referring to fig. 5, the waterproof structure preferably includes a first waterproof structure 105 disposed between the clamping block 20 and the opening of the inner bore 11. In this embodiment, the first waterproof structure 105 is an annular protrusion, and is used for being in interference fit with the electrode 3 to achieve a waterproof effect. Further, the waterproof structure further comprises a second waterproof structure 106, and the clamping block 20 is disposed between the first waterproof structure 105 and the second waterproof structure 106. Through setting up second waterproof construction 106, can reach dual waterproof effect, water-proof effects is better. Similar to the first waterproof structure 105, the second waterproof structure 106 is also an annular protrusion, which is used for interference fit with the electrode 3 to achieve the waterproof effect. Furthermore, the waterproof structure further includes a third waterproof structure 107, and the second waterproof structure 106 is disposed between the clamping block 20 and the third waterproof structure 107, so as to further improve the waterproof performance. Similarly, the third waterproof structure 107 is also an annular protrusion, and is also used for being in interference fit with the electrode 3 to achieve the waterproof purpose. In this embodiment, the number of the waterproof structures is not limited to one, two, or three, and may be three or more. Furthermore, it will be appreciated that the electrode 3 is typically a circular electrode, and thus the annular protrusion is typically circular in shape, and further that the electrode 3 is typically 1.3mm in diameter, and correspondingly the annular protrusion has an inner diameter of less than 1.3mm, for example the inner diameter of the annular protrusion may be selected to be 0.8mm to 1.0 mm. Furthermore, the width of the annular bulge along the axial direction of the electrode shell is preferably 0.4-0.6 mm, the size is convenient to process, and the electrode 3 is easy to plug and pull.

As mentioned above, the clamping block 20 is preferably an elliptical cylinder, the length of the major axis of the inner ellipse where the through hole 21 is located is greater than the aperture of the inner hole of the electrode shell, for example, when the diameter of the electrode 3 is 1.3mm, the length of the major axis of the inner ellipse may be selected to be 2.5mm to 4.5mm, and the length of the minor axis of the inner ellipse should be less than the diameter of the electrode, for example, may be selected to be 0.9mm to 1.1 mm. The utility model discloses do not do special restriction to the thickness of clamp block 20, as long as clamp block 20 easily in radial direction deformation can. In this embodiment, the thickness of the clamping block 20 is 0.6mm to 1.0mm, and the size is small, which is beneficial to reducing the size of the electrode cap.

Referring further to fig. 3, the electrode case 10 includes a body 101, and preferably, a positioning portion is provided on an outer surface of the body 101 corresponding to the clamping block 20. In practice, the operator can deform the clamping block 20 by applying pressure to the positioning portion, and the size of the through hole 21 is increased (i.e., the minimum size is increased) to allow the electrode 3 to pass through the through hole 21. More specifically, the clamping block 20 is an elliptical cylinder, and the positioning portions are arranged corresponding to two ends of a long axis of the elliptical cylinder; when the positioning portion is pressed, the minor axis of the elliptical cylinder is increased to enlarge the size of the through hole 21. Here, the major axis of the elliptic cylinder means the major axis of the ellipse on the cross section of the elliptic cylinder.

Preferably, the body 101 is cylindrical, the positioning portion includes two first planes 103 disposed opposite to each other, and the two first planes 103 are preferably tangent to the body 101 and disposed in parallel (i.e., the two first planes 103 are symmetrical with respect to the axis of the body 101), so that a line connecting tangents of the two first planes 103 is a direction of a maximum dimension of the clamping block 20, i.e., a long axis direction of the ellipse. In this way, the operator can ensure that the clamping blocks 20 are deformed in the direction of increasing the size of the through hole 21 by simply applying pressure at the two first planes 103. And the distance between the two first planes 103 is the same as the diameter of the body 101, so that the size of the electrode sealing device can be prevented from being increased, and the comfort of a patient can be ensured. For example, when the diameter of the electrode 3 is 1.3mm, the diameter of the body 101 is preferably 3.0mm to 5.5mm, and it is apparent that the size of the entire electrode sealing device is small, and thus the size of the electrode sealing device embedded under the scalp of a patient is small, and the patient can use the electrode sealing device comfortably. The axial length of the electrode shell 10 is set according to the length of the electrode 3 to be sealed, but the present invention is not limited thereto, for example, in this embodiment, the axial length of the body 101 may be selected to be 31mm to 33 mm.

Further, the outer surface of the body 101 is further provided with a second plane 102, the second plane 102 is adjacent to two first planes 103, and the two first planes 103 and the second plane 102 are arranged around the axis of the electrode shell, i.e. along the circumferential direction of the body 101. Here, the second plane 102 is provided simultaneously with the two first planes 103, which helps the operator to identify the point of application of force more quickly, facilitates the operator to hold and operate the small-sized electrode cap by hand, and also facilitates the insertion of the electrode 3 while applying pressure. Preferably, the second plane 102 is perpendicular to both the first planes 103, and the second plane 102 is flush with the outer surface of the body 101, so that the strength of the whole device can be ensured, and the size of the device can be prevented from being increased.

In this embodiment, the inner hole 11 of the electrode shell 10 is used for inserting the electrode 3, and is in clearance fit with the electrode 3, for example, when the diameter of the electrode 3 is 1.3mm, the inner diameter of the inner hole 11 may be 1.4mm to 1.5mm, which is not too small to affect the assembly of the electrode, but not too large to increase the size of the device. The shape of the inner hole 11 is generally matched with the shape of the electrode 3, which is not limited by the present invention. In addition, the electrode shell 10 is made of a soft material to ensure the comfort of the patient, and the material is usually a medical polymer material, including but not limited to polyurethane, silica gel, etc. The clamping block 20 should have a certain hardness and a certain fatigue resistance, and the material may be a metal material or a non-metal material, such as stainless steel, PEEK (polyether ether ketone), or polyurethane. Preferably, the electrode case 10 and the clamping block 20 are integrally formed, for example, by injection molding or compression molding.

Further, in order to make the electrode clamping more firm, as shown in fig. 7, a protrusion 22 may be formed on the inner wall of the through hole 21 of the clamping block 20, and the shape of the protrusion 22 is preferably an arc-shaped protrusion, which may reduce damage to the electrode 3 during the clamping process. The number and distribution of the protrusions 22 are not required, and may be uniformly distributed or non-uniformly distributed. The protrusions 22 may be distributed at intervals or may be distributed continuously as shown in fig. 8, i.e., the protrusions 22 are formed in a wave shape. In other embodiments, the protrusions 22 may also be saw-tooth shaped protrusions. In an alternative embodiment, a groove may be provided on the inner wall of the through hole 21, which also increases the robustness of the clamping.

Further, the inventor considers that the clamping block 20 has a certain difficulty in positioning in the electrode shell 10, because on one hand, the clamping block 20 has a small size and a large assembling difficulty, and on the other hand, the connection strength between the clamping block 20 and the electrode shell 10 is difficult to ensure (for example, the connection between metal and polymer materials), therefore, the utility model discloses utilize secondary injection molding to process the electrode shell 10 with the clamping block 20 inside.

Specifically, as shown in fig. 9, the clamping block 20 is first positioned in a mold cavity (not shown) in advance, the core rod 60 is inserted into the mold cavity for positioning, and injection molding is performed for the first time to obtain the intermediate structure shown in fig. 9(a), then injection molding is performed for the second time to wrap the clamping block 20 with an injection molding material, and finally the finished structure shown in fig. 9(b) is obtained, that is, the electrode shell 10 is obtained by injection molding for the second time, so that the connection strength between the electrode shell 10 and the clamping block 20 is ensured during the molding process, and the clamping block 20 is ensured not to fall off or shift easily. In addition, the shape of the core rod 60 matches the shape of the inner hole 11 of the electrode shell 10, for example, an annular groove is formed on the core rod 60 to form an annular protrusion.

The preferred embodiment of the present invention is described above, but not limited to the scope disclosed in the above embodiments, for example, in other embodiments, the second plane 102 may be eliminated, and for example, the positioning portion is not limited to the structural form of the first plane 103, and may be a structure with an indication mark or other shapes arranged on the outer surface of the body 101 to indicate the force-receiving position of the clamping block. In addition, the diameter of the electrode 3 that is suitable for is not limited to 1.3mm, the utility model discloses an electrode sealing device also can be applied to the electrode of sealed fixed other sizes, does not limit to this. In addition, the body shape of the electrode case includes, but is not limited to, a cylindrical shape, and here, a cylindrical shape is preferable in view of comfort of a patient when in use. Furthermore, the utility model discloses do not injecing the axial length of clamp block, under the normal conditions, the length of clamp block should not be short and overlength, and the fastness of centre gripping is difficult to guarantee to the short, then is difficult to the plug electrode too big.

The above description is only for the preferred embodiment of the present invention, and not for any limitation of the scope of the present invention, and any modification and modification made by those skilled in the art according to the above disclosure all belong to the protection scope of the present invention.

Claims (13)

1. An electrode sealing device is characterized by comprising an electrode shell, a clamping block and a waterproof structure; the electrode shell is provided with an inner hole extending axially, one end of the inner hole is opened, and the other end of the inner hole is blocked; the clamping block is arranged in the inner hole, the clamping block is provided with a through hole extending axially, and the through hole is communicated with the inner hole; the waterproof structure is arranged in the inner hole and positioned on at least one side of the clamping block;

wherein: the clamping block is configured to deform when subjected to an external force to allow an electrode to be inserted into the electrode shell through the through hole; the clamping block is further configured to clamp the electrode through the through hole after the external force is removed, so that the electrode is fixed relative to the electrode sealing device.

2. The electrode sealing device according to claim 1, wherein the electrode shell comprises a body, and a positioning part is arranged on the outer surface of the body corresponding to the clamping block; when the positioning part is acted by external force, the clamping block is deformed, so that the size of the through hole is enlarged, and the electrode is allowed to pass through the through hole.

3. The electrode sealing device according to claim 2, wherein the clamping block is an elliptical cylinder, and the positioning portions are provided corresponding to both ends of a long axis of the elliptical cylinder; when the positioning part is acted by external force, the short axis of the elliptic cylinder is increased, so that the size of the through hole is increased.

4. The electrode sealing device according to claim 2 or 3, wherein the body of the electrode casing is cylindrical, and the positioning portion includes two first planes that are symmetrical with respect to the axis of the electrode casing, the two first planes being tangential to and parallel to the body.

5. The electrode sealing device according to claim 4, wherein the outer surface of the body is further provided with a second plane, the second plane adjoining two of the first planes, and two of the first planes and one of the second planes being arranged around the axis of the electrode shell.

6. The electrode sealing device according to claim 5, wherein the second plane is perpendicular to both of the first planes and the second plane is flush with an outer surface of the body.

7. The electrode sealing device of claim 1, wherein the water-tight structure comprises a first water-tight structure disposed between the clamping block and the opening.

8. The electrode sealing device of claim 7, wherein the water-proof structure further comprises a second water-proof structure and a third water-proof structure, the clamping block is disposed between the first water-proof structure and the second water-proof structure, and the second water-proof structure is disposed between the clamping block and the third water-proof structure.

9. The electrode seal according to claim 1, wherein the water-proof structure is an annular projection formed on an inner surface of the bore, the annular projection having an inner diameter smaller than a diameter of the electrode.

10. The electrode sealing device according to claim 1, wherein a protrusion or a groove is formed on an inner wall of the through-hole.

11. The electrode sealing device according to claim 1, wherein the electrode shell is coupled to the clamping block by a two-shot molding process.

12. The electrode sealing device of claim 1, wherein the clamping block has a length less than a length of the bore, and the clamping block is disposed adjacent the opening of the bore.

13. The electrode sealing device according to claim 1, wherein the material of the clamping block is stainless steel, polyetheretherketone or polyurethane, and the material of the electrode shell is a medical polymer material.

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