CN111529937A - pulse generator - Google Patents

Abstract

The invention relates to a pulse generator, which comprises a fixing component for fixing a wire, wherein the fixing component comprises a fixing block and a fixing piece capable of being locked in the fixing block, at least one accommodating hole for accommodating the wire is formed in the fixing block, the fixing piece comprises a locking part matched with the fixing block to realize the locking of the fixing piece and the fixing block and a pressing part arranged on the locking part, and the pressing part presses the wire in the accommodating hole. The fixing piece for fixing the lead is divided into a locking part for locking the fixing piece and a pressing part for pressing the fixing lead, so that the height of the fixing piece is reduced, the position of the fixing piece can be flush with the surface of the pulse generator, the comfort of the pulse generator when the pulse generator is implanted into a human body is improved, and the pulse generator is simple in structure and attractive.

Description

pulse generator

technical field

The invention relates to the technical field of medical instruments, in particular to a pulse generator.

Background technique

Nerve electrical stimulation is a commonly used method for the treatment of nerve dysfunction and nerve injury rehabilitation. Typically, electrical nerve stimulation systems include pulse generators, leads, and electrodes implanted in the body, and control devices located outside the body. One end of the wire is connected to the pulse generator and the other end is connected to the electrode, so that the pulse generated by the pulse generator is transmitted to the electrode to electrically stimulate the nerve. Since the pulse generator and the lead are implanted into the human body, it must be ensured that the connection between the pulse generator and the lead is tight. The principle of the current nerve stimulation system to fix the lead is: after the lead is inserted into the implantable pulse generator, use a tool to lock the fixed part on the pulse generator, so that the end face of the fixed part presses the lead, so as to fix the lead Location. However, because the bottom end face of the fastening part must be on the upper side of the wire, and the fastening part must have enough threads to ensure the locking strength, the fastening part has a certain height limit. The sealing structure also has a certain height, so the height of the fixed part is always high, and it protrudes from the surface of the pulse generator, which increases the height or thickness of the product and reduces the comfort of the pulse generator implanted in the human body.

SUMMARY OF THE INVENTION

The purpose of the present invention is to provide a pulse generator with a lower height at the wire fixing position, a simple structure, and a beautiful appearance.

In order to achieve the above object, the present invention provides the following technical solutions: a pulse generator, comprising a fixing assembly for fixing a wire, the fixing assembly includes a fixing block and a fixing member that can be locked into the fixing block, the The fixing block is provided with at least one receiving hole for accommodating the wire, the fixing piece includes a locking portion that cooperates with the fixing block to realize the locking of the fixing piece and the fixing block, and a locking portion arranged on the locking portion The pressing part on the upper part, the pressing part presses the wire in the receiving hole.

Further, the fixing member is provided with a force applying portion for applying force by an external force to move the pressing portion relative to the receiving hole.

Further, the force applying portion is a groove formed concavely from the surface of the pressing portion and can be matched with a force applying tool.

Further, the fixing block is provided with a locking hole which is locked and matched with the locking portion.

Further, the locking hole and the locking portion are threaded.

Further, an accommodating cavity for accommodating the pressing portion is formed on the fixing block, the accommodating hole communicates with the accommodating cavity and forms a pressing hole, and the pressing portion blocks the pressing portion. Press the hole.

Further, the accommodating hole and the locking hole are located on the same side of the accommodating cavity.

Further, the pressing portion has a pressing surface for blocking the pressing hole, and the pressing surface is an inclined surface, a flat surface or a curved surface.

Further, the curved surface is an arc surface, and the radius of curvature of the arc surface matches the radius of the wire.

Further, the fixing member further includes a protruding portion provided on the pressing portion, and a sealing ring is provided between the protruding portion and the top surface of the fixing block.

Further, a sealing ring is provided between the pressing portion and the accommodating cavity.

Further, the sealing ring is arranged in a concave ring opened in the pressing portion or in a concave ring opened in the accommodating cavity.

Further, the fixing block includes a first fixing block and a second fixing block that are connected and fixed with each other, the first fixing block and the second fixing block jointly define the receiving hole, and the first fixing block and The second fixing blocks together define an accommodating cavity for accommodating the pressing portion, and a locking hole for locking and matching with the locking portion is defined on the first fixing block.

Further, the accommodating hole communicates with the accommodating cavity and forms a pressing hole, and the pressing portion blocks the pressing hole.

Further, the accommodating hole and the locking hole are located on opposite sides of the accommodating cavity.

Further, the pressing portion is integrally fixed with the locking portion, and the pressing portion is fixed to the locking portion through a connecting block.

Further, the fixing member further includes a protruding portion provided on the locking portion, and a sealing ring is provided between the protruding portion and the top surface of the first fixing block.

Further, the fixing member is provided with a force applying portion for applying force by an external force to move the pressing portion relative to the receiving hole.

Further, the force applying portion includes a groove formed concavely from the surface of the pressing portion and can be matched with the force applying tool, and a concave portion formed concavely from the surface of the locking portion and can be matched with the force applying tool.

The beneficial effect of the present invention is that in the pulse generator provided by the present invention, the fixing member for fixing the wire is divided into a locking portion for locking the fixing member and a pressing portion for pressing and fixing the wire, thereby reducing the fixing member. The height of the fixed piece can be flush with the surface of the pulse generator, thereby improving the comfort of the pulse generator when it is implanted into the human body. The pulse generator has a simple and beautiful structure.

The above description is only an overview of the technical solution of the present invention. In order to understand the technical means of the present invention more clearly, and implement it according to the content of the description, the preferred embodiments of the present invention are described in detail below with the accompanying drawings.

Description of drawings

FIG. 1 is a schematic structural diagram of a fixing assembly according to a first embodiment of the present invention;

FIG. 2 is a schematic structural diagram of a fixing assembly according to a second embodiment of the present invention;

3 is a schematic structural diagram of a fixing assembly according to a third embodiment of the present invention;

FIG. 4 is a schematic structural diagram of a fixing assembly shown in a fourth embodiment of the present invention;

5 is a schematic structural diagram of a fixing assembly shown in a fifth embodiment of the present invention;

6 is a schematic structural diagram of the fixing member in the first direction according to the fifth embodiment of the present invention;

7 is a schematic structural diagram of the fixing member in the second direction according to the fifth embodiment of the present invention;

8 is a schematic structural diagram of a fixing assembly according to a sixth embodiment of the present invention;

9 is a schematic structural diagram of a fixing assembly according to a seventh embodiment of the present invention;

10 is a schematic structural diagram of the fixing member in the first direction according to the seventh embodiment of the present invention;

FIG. 11 is a schematic structural diagram of the fixing member in the second direction according to the seventh embodiment of the present invention.

Detailed ways

The specific embodiments of the present invention will be described in further detail below with reference to the accompanying drawings and embodiments. The following examples are intended to illustrate the present invention, but not to limit the scope of the present invention.

In order for the pulse generator shown in the present invention to be used to treat diseases such as nerve dysfunction and nerve damage in the human body, the pulse generator, the wires connected to the pulse generator, and the electrodes used for electrical stimulation of the nerves need to be implanted together human body. In order to increase the connection stability of the wire on the pulse generator, the pulse generator includes a fixing assembly for fixing the wire. The fixing assembly includes a fixing block and a fixing member that can be locked into the fixing block. The fixing block is provided with a wire receiving At least one receiving hole, the fixing piece includes a locking portion that cooperates with the fixing block to realize the locking of the fixing piece and the fixing block, and a pressing portion arranged on the locking portion, and the pressing portion presses the wire in the receiving hole, pressing the The locking portion and the locking portion are integrally formed, so that the volume of the fixing member can be reduced. In addition, the pressing portion and the locking portion can also be detachably connected and fixed, which is not specifically limited here.

The fixing member is provided with a force applying portion for applying force from external force to make the pressing portion move relative to the receiving hole, and the force applying portion is a groove formed concavely from the surface of the pressing portion and can be matched with a force applying tool. The specific position is selected according to actual needs. The specific structure of the groove is not limited here. It can be a hexagonal groove or a cross groove. The force applying tool can be a screwdriver. It is easy to think that the force applying part can also be used with other tools The matching structure is not limited to screwdrivers.

The fixing block is provided with a locking hole that is locked and matched with the locking portion, and the locking hole and the locking portion are threaded. It is true that in other implementations, the locking method of the locking hole and the locking portion can also be other methods, such as interference fit. etc., no specific limitation is made here. The fixing block is also formed with an accommodating cavity for accommodating the pressing portion, the accommodating hole is arranged on one side of the accommodating cavity, the accommodating hole communicates with the accommodating cavity and forms a pressing hole, and the pressing portion blocks the pressing hole. Wherein, the accommodating hole and the locking hole are located on the same side of the accommodating cavity, the locking hole and the accommodating cavity are arranged in communication with each other, and the accommodating cavity is located above the locking hole.

The pressing portion has a pressing surface that blocks the pressing hole, the pressing surface is formed on the pressing portion, and the pressing surface is an inclined surface or a flat surface or a curved surface. The wire is fully contacted and pressed into the receiving hole. The pressing surface can be set according to the shape of the wire. Because the wire has an arc surface, the curved surface of the pressing surface is an arc surface, and the radius of curvature of the arc surface is the same as that of the arc surface. Wire radii match.

The fixing part further includes a protruding part arranged on the pressing part. The protruding part and the pressing part can be integrally formed, that is, the protruding part is formed by protruding outward from the pressing part. The part and the pressing part can also be detachably fixed, which is not specifically limited here. When the fixing part is locked into the fixing block, a sealing ring is arranged between the protruding part and the top surface of the fixing block, so as to increase the fixing The sealing ring can be arranged in the concave ring opened in the protruding part or in the concave ring opened in the fixing block, and the concave ring is formed on the periphery of the accommodating cavity. In addition, the fixing part is not provided with a protruding part, and when the fixing part is locked into the fixing block, the pressing part is located in the accommodating cavity. A sealing ring may be provided, and the sealing ring is arranged in the concave ring opened in the pressing part or in the concave ring opened in the accommodating cavity. The specific position of the sealing ring is not specifically limited here, and can be set according to actual needs.

The fixing block may be a whole, and may also include a first fixing block and a second fixing block that are connected and fixed with each other, the first fixing block and the second fixing block jointly define the receiving hole, and the first fixing block The block and the second fixing block jointly define an accommodating cavity for accommodating the pressing portion, and the first fixing block is provided with a locking hole for locking and matching with the locking portion. The accommodating hole communicates with the accommodating cavity and forms a pressing hole, and the pressing portion blocks the pressing hole. At this time, the accommodating hole and the locking hole are located on opposite sides of the accommodating cavity, and the locking hole is located above the accommodating cavity. The pressing portion is integrally fixed with the locking portion, and the pressing portion is fixed to the locking portion through a connecting block. The fixing member further includes a protruding portion arranged on the locking portion, and the protruding portion is formed to protrude outward from the locking portion. In other embodiments, the protruding portion and the locking portion can also be detachably fixed. , which is not specifically limited here, a sealing ring is provided between the protruding part and the top surface of the first fixing block, and the sealing ring is arranged in the concave ring on the top surface of the first fixing block or the concave ring of the protruding part. In the ring, there is no specific limitation here. In addition, the fixing member is provided with a force-applying portion for applying external force to make the pressing portion move relative to the receiving hole. The groove for matching the force tool and the concave portion formed concavely from the surface of the locking portion and which can be matched with the force applying tool are used to facilitate the use of the force applying tool to drive the fixing piece to move up and down in the fixing block. It should be noted that, when the fixing block is divided into two parts, the space of the accommodating cavity provided in the fixing block is larger than the size of the pressing portion, so that the pressing portion can move in the accommodating cavity.

The structure of the fixed assembly is described in detail below with specific embodiments:

Example 1

Referring to FIG. 1 , the fixing assembly 1 for fixing a wire shown in this embodiment includes a fixing block 11 and a fixing member 12 that can be locked into the fixing block 11 . The structure of the inner cavity of the generator is set, and the cross section of the fixing block 11 is similar to a U-shaped structure. The fixing block 11 is provided with two accommodating holes 111 for accommodating wires, a locking hole 112 for locking and matching with the locking portion 121 , and a accommodating cavity 113 for accommodating the pressing portion 122 . The cross section is similar to a circle, and the size is set according to the wire to be accommodated. The locking hole 112 is a cylindrical cavity, and the accommodating cavity 113 is a cavity similar to a truncated cone and a cylindrical combination. The two accommodating holes 111 are oppositely arranged in the locking holes. The two sides of 112 communicate with the accommodating cavity 113 and form a pressing hole 1111. The accommodating cavity 113 communicates with the locking hole 112 and is located above the locking hole 112. The locking hole 112 is a threaded hole capable of screwing with the locking portion 121 . In this embodiment, the locking portion 121 and the pressing portion 122 of the fixing member 12 are integrally formed, and the cross-section is a T-shaped structure, wherein the locking portion 121 is a cylindrical structure, and the outer circumference has a threaded fitting with the locking hole 112 threaded, the abutting portion 122 is similar to a truncated cone-shaped structure, and the bottom surface with a smaller area is butted with the locking portion 121, and the abutting portion 122 blocks the pressing hole 1111 to fix the wire in the receiving hole 111. Therefore, the pressing The portion 122 has a pressing surface 1221 that blocks the pressing hole 1111. In this embodiment, the pressing surface 1221 is an inclined surface, and the inclined surface is a connecting surface that connects the upper and lower bottom surfaces in a similar circular truncated structure. The pressing surface 1221 can be a curved surface, and the curved surface can cooperate with the outer surface of the wire to have a larger contact area, so as to better fix the wire in the receiving hole 111 . The force-applying portion 123 is a groove 123 formed concavely from the surface of the pressing portion 122 and can be matched with a screwdriver. The groove 123 is a cross-groove structure.

The method for fixing the wires of the fixing assembly 1 in this embodiment is as follows: firstly insert two wires into one receiving hole 111 respectively, or only one wire can be inserted into the receiving hole 111, and then the T-shaped fixing member 12 is removed from the receiving hole 111. Assemble from top to bottom. Specifically, the screwdriver is clamped in the groove 123, and the screwdriver is rotated. Under the cooperation of the thread on the outer circumference of the locking portion 121 and the thread in the locking hole 112, the locking portion 121 drives the pressing portion 122 to the fixing block. 12, and when the inclined surface of the pressing portion 122 abuts against the wire, continue to rotate the screwdriver until the wire is fixed in the receiving hole 111 and pressed by the pressing portion 122, so as to ensure that the wire cannot be easily moved. , the fixing member 12 completely enters the fixing block 11 . It should be noted that the pressing portion 122 in this embodiment is completely accommodated in the accommodating cavity 113 and does not protrude from the fixing block 11 , so that the position of the fixing wire can be level with the surface of the pulse generator, and the pulse generator can be added. aesthetics and comfort when implanted in the human body.

Embodiment 2

Referring to FIG. 2 , the fixing assembly 2 shown in the second embodiment of the present invention is basically the same as the fixing assembly 1 shown in the first embodiment. The difference is that in this embodiment, the pressing portion 222 in the fixing assembly 2 is The pressing surface 2221 of the pressing wire is a plane, that is, the fixing member 22 is a T-shaped structure in which the pressing portion 222 and the locking portion 221 are integrally formed, and the bottom surface of the pressing portion 222 facing the locking portion 221 serves as the pressing surface 2221 to press against wire.

Embodiment 3

Referring to FIG. 3 , the fixing assembly 3 shown in the third embodiment of the present invention is basically the same as the fixing assembly 1 shown in the first embodiment. The difference is that in this embodiment, the fixing member 32 further includes a locking portion 321 disposed on the locking portion 321 . The protruding portion 324 is formed above the pressing portion 322. The protruding portion 324 is formed to extend outward from the pressing portion 322. The protruding portion 324 and the pressing portion 322 are integrally formed. When the 32 is locked into the fixing block 31 and the wire is pressed, the protruding part 324 does not enter the accommodating cavity 313, but is located above the top surface of the fixing block 31. The top surface of the fixing block 31 is provided with a concave ring 315, which protrudes A sealing ring 314 is disposed between the extending portion 324 and the top surface of the fixing block 31 , and the sealing ring 314 is located in the concave ring 315 , so as to increase the sealing performance between the fixing member 32 and the fixing block 31 . Of course, in other embodiments, the concave ring may be provided on the protrusion.

Embodiment 4

Referring to FIG. 4 , the fixing assembly 4 shown in the fourth embodiment of the present invention is basically the same as the fixing assembly 1 shown in the first embodiment. The difference is that in this embodiment, a sealing ring is arranged between the accommodating cavity 413 and the accommodating cavity 413 . 414 , a concave ring 4221 is formed on the side wall of the pressing portion 422 , and the sealing ring 414 is located in the concave ring 4221 , so as to increase the sealing performance between the fixing member 42 and the fixing block 41 . Of course, in other embodiments, the concave ring may be provided on the fixing block.

Embodiment 5

Referring to FIGS. 5 to 7 , the fixing assembly 5 shown in the fifth embodiment of the present invention is basically the same as the fixing assembly 2 shown in the second embodiment. The difference is that in this embodiment, the fixing member 52 further includes a For the protruding portion 524 on the locking portion 521, the specific structure, position, function, etc. of the protruding portion 524 can be found in the third embodiment, and details are not repeated here. A concave ring 515 is formed on the top surface of the fixing block 51 , a sealing ring 514 is arranged between the protruding portion 524 and the top surface of the fixing block 51 , and the sealing ring 514 is located in the concave ring 515 , thereby increasing the fixing member 52 and the fixing block 51 tightness between.

Embodiment 6

Referring to FIG. 8 , the fixing assembly 6 shown in the sixth embodiment of the present invention is basically the same as the fixing assembly 1 shown in the first embodiment. The difference is that the fixing assembly 6 shown in this embodiment for fixing the wire The fixing block 61 in the middle includes a first fixing block 615 and a second fixing block 616 that are fixedly connected to each other. The receiving hole 611 is formed on the first fixing block 615 and the second fixing block 616. The first fixing block 615 and the first fixing block 615 The two fixing blocks 616 jointly define an accommodating cavity 613 for accommodating the pressing portion 622 , and a locking hole 612 is formed on the first fixing block 615 . From the figure, the locking hole 612 is located above the accommodating cavity 613 . , and the locking hole 612 and the accommodating hole 611 are roughly located on opposite sides of the accommodating cavity 613 respectively; the first fixing block 615 is provided with a number of bumps 6151 at the bottom, and the second fixing block 616 is provided with a corresponding position of the accommodating bump 6151 When the protrusion 6151 is inserted into the receiving groove 6161, the first fixing block 615 and the second fixing block 616 can be relatively fixed relative to each other. It is true that in other embodiments, the connection between the first fixing block and the second fixing block The fixing method can also be other, which is not specifically limited here. In this embodiment, the force applying portion 623 includes a concave portion 623 formed concavely from the surface of the locking portion 621 away from the pressing portion 622 , and a groove 620 formed concavely on the bottom surface of the pressing portion 622 away from the locking portion 621 , The groove 620 is used to lock the fixing member 62 into the first fixing block 615 from the lower part of the first fixing block 615. The groove 620 can be the same as the concave part 623, and it is a hexagonal groove or a cross groove matched with a screwdriver. In the embodiment, the pressing portion may not be provided with a groove, but directly press against the pressing portion to lock the fixing member into the first fixing block. It should be noted that the pressing portion 622 can move in the accommodating cavity 613 , and the space of the accommodating cavity 613 is larger than the size of the pressing portion 622 .

The method for fixing the wire by the fixing assembly 6 in this embodiment is: referring to FIG. 8 , firstly assemble the T-shaped fixing member 62 into the first fixing block 615 from bottom to top, specifically, at the position below the first fixing block 615 At this point, the screwdriver is inserted into the groove 620 and the fixing member 62 is rotated, so that the thread on the outer circumference of the locking portion 621 is matched with the thread in the locking hole 612, so that the fixing member 62 enters the fixing block 61 until the pressing portion 622 completely enters the In the accommodating cavity 613 so that the accommodating hole 611 can be inserted into the wire, the second fixing block 616 is clamped on the first fixing block 615, and when the wire is fixed, the two wires are respectively inserted into one accommodating hole 611. Only one wire can be inserted into the receiving hole 611, the screwdriver can be inserted into the recess 623 on the locking portion 621, and the fixing member 62 can be rotated, so that the inclined surface of the pressing portion 622 can abut the wire, and then continue to rotate the screwdriver until the The wire is fixed in the receiving hole 611 and pressed by the pressing portion 622 .

Embodiment 7

Referring to FIGS. 9 to 11 , the fixing assembly 7 shown in the seventh embodiment of the present invention is basically the same as the fixing assembly 6 shown in the sixth embodiment. The difference is that in this embodiment, the pressing portion 722 and the locking portion 721 is separately fixed and the pressing part 722 is fixed to the locking part 721 through the connecting block 726. The connecting block 726 is a small screw 726, and the pressing part 722 and the locking part 721 are both provided with threads that can be threadedly connected with the small screw 726 A hole (not numbered), wherein the threaded hole on the pressing portion 722 penetrates the pressing portion, and a small screw 726 is inserted from one end of the pressing portion 722 and inserted into the threaded hole of the locking portion 721, so that the pressing portion 722 is inserted into the threaded hole of the locking portion 721. It is fixed to the locking portion 721 . In addition, the fixing member 72 further includes a protruding portion 724 provided on the locking portion 721 , and a sealing ring 714 is provided between the protruding portion 724 and the top surface of the fixing block 71 . The specific structure and function of the protruding portion 724 can be Refer to the third embodiment, which will not be repeated here.

The method for fixing the wire of the fixing assembly 7 in this embodiment is: referring to FIG. 9 , assembling the locking portion 721 into the locking hole 712 of the first fixing block 715 from top to bottom, specifically, from the top of the first fixing block 715 position, and use a screwdriver to insert into the concave portion 723 and rotate the locking portion 721. The thread on the outer circumference of the locking portion 721 cooperates with the thread in the locking hole 712, so that the locking portion 721 enters the fixing block 71 and pushes the pressing portion 722 from the first The lower part of the fixing block 715 is fixed to the locking part 721 with small screws 726, and the second fixing block 716 is clamped on the first fixing block 715. Only one wire can be inserted into the receiving hole 711, the screwdriver can be inserted into the concave part 723 of the locking part 721, and the fixing part 72 can be rotated, so that the inclined surface of the pressing part 722 can abut the wire, and then continue to rotate the screwdriver until the The wire is fixed in the receiving hole 711 and pressed by the pressing portion 722 .

To sum up, in the pulse generator provided by the present invention, the fixing member for fixing the wire is divided into a locking portion for locking the fixing member and a pressing portion for pressing against the fixing wire, thereby reducing the height of the fixing member, so that the The position of the fixing piece can be flush with the surface of the pulse generator, so as to improve the comfort of the pulse generator when implanted in the human body, and the pulse generator has a simple and beautiful structure.

The technical features of the above-described embodiments can be combined arbitrarily. For the sake of brevity, all possible combinations of the technical features in the above-described embodiments are not described. However, as long as there is no contradiction between the combinations of these technical features, All should be regarded as the scope described in this specification.

The above-mentioned embodiments only represent several embodiments of the present invention, and the descriptions thereof are specific and detailed, but should not be construed as a limitation on the scope of the invention patent. It should be pointed out that for those of ordinary skill in the art, without departing from the concept of the present invention, several modifications and improvements can also be made, which all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention should be subject to the appended claims.

Claims (19)

1. A pulse generator, characterized in that the pulse generator comprises a fixing assembly for fixing a wire, and the fixing assembly includes a fixing block and a fixing member that can be locked into the fixing block, and the fixing At least one accommodating hole for accommodating the wire is arranged in the block, and the fixing member includes a locking portion that cooperates with the fixing block to realize the locking between the fixing member and the fixing block, and is arranged on the locking portion. the pressing part, the pressing part presses the wire in the receiving hole. 2 . The pulse generator according to claim 1 , wherein the fixing member is provided with an urging portion for urging an external force to move the pressing portion relative to the receiving hole. 3 . 3 . The pulse generator according to claim 2 , wherein the force applying portion is a groove formed concavely from the surface of the pressing portion and can be matched with a force applying tool. 4 . 4 . The pulse generator according to claim 1 , wherein the fixing block is provided with a locking hole for locking and matching with the locking portion. 5 . 5 . The pulse generator according to claim 4 , wherein the locking hole and the locking portion are threaded. 6 . 6 . The pulse generator according to claim 1 , wherein an accommodating cavity for accommodating the pressing portion is formed on the fixing block, and the accommodating hole communicates with the accommodating cavity and forms a accommodating cavity. 7 . A pressing hole, the pressing portion blocks the pressing hole. 7 . The pulse generator of claim 6 , wherein the receiving hole and the locking hole are located on the same side of the receiving cavity. 8 . 8 . The pulse generator according to claim 7 , wherein the pressing portion has a pressing surface for blocking the pressing hole, and the pressing surface is an inclined surface, a flat surface or a curved surface. 9 . 9 . The pulse generator according to claim 8 , wherein the curved surface is a circular arc surface, and the radius of curvature of the circular arc surface matches the radius of the wire. 10 . 10 . The pulse generator according to claim 1 , wherein the fixing member further comprises a protruding portion disposed on the pressing portion, the protruding portion being located between the top surface of the fixing block and the protruding portion. 11 . A sealing ring is provided between. 11 . The pulse generator according to claim 6 , wherein a sealing ring is provided between the pressing portion and the accommodating cavity. 12 . 12 . The pulse generator according to claim 11 , wherein the sealing ring is disposed in a concave ring formed in the pressing portion or in a concave ring formed in the accommodating cavity. 13 . 13 . The pulse generator according to claim 1 , wherein the fixed block comprises a first fixed block and a second fixed block which are connected and fixed in cooperation with each other, the first fixed block and the second fixed block. 14 . The accommodating hole is jointly defined, the first fixing block and the second fixing block jointly define an accommodating cavity for accommodating the pressing portion, and the first fixing block is provided with the locking portion. Lock the mating locking hole. 14 . The pulse generator of claim 13 , wherein the receiving hole communicates with the receiving cavity to form a pressing hole, and the pressing portion blocks the pressing hole. 15 . 15 . The pulse generator of claim 14 , wherein the receiving hole and the locking hole are located on opposite sides of the receiving cavity. 16 . 16 . The pulse generator of claim 13 , wherein the pressing portion is integrally fixed with the locking portion, and the pressing portion is fixed to the locking portion through a connecting block. 17 . 17. The pulse generator of claim 13, wherein the fixing member further comprises a protruding portion disposed on the locking portion, the protruding portion and the top surface of the first fixing block There is a sealing ring in between. 18 . The pulse generator according to claim 13 , wherein the fixing member is provided with a force applying portion for applying force from an external force to move the pressing portion relative to the receiving hole. 19 . 19 . The pulse generator of claim 18 , wherein the force applying portion comprises a groove formed concavely from the surface of the pressing portion and can be matched with a force applying tool, and a self-locking portion. 20 . A concave portion formed in a concave surface and can be matched with a force-applying tool.

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