CN219630444U - Connection structure of implantable pulse generator and implantable pulse generator - Google Patents

Abstract

The utility model discloses a connection structure of an implantable pulse generator and the implantable pulse generator, wherein the connection structure is formed between a feed-through wire and a charging coil, the charging coil is provided with a charging coil leading-out end, the diameter of the feed-through wire is 1.5-5 times that of the charging coil leading-out end, and the charging coil leading-out end is stacked on the feed-through wire along the length direction of the feed-through wire and is fixedly connected with at least one part of the feed-through wire. The utility model realizes the technical effects of improving the connection stability of the feed-through wire and the lead-out end of the charging coil without additionally arranging a connecting piece and reducing the possibility of falling off of the feed-through wire and the lead-out end of the charging coil in the using process, thereby solving the problems of unstable connection and easy falling off of the charging coil of the implantable pulse generator and the feed-through wire in the related technology.

Description

Connection structure of implantable pulse generator and implantable pulse generator

Technical Field

The utility model relates to the technical field of implantable medical equipment, in particular to a connecting structure of an implantable pulse generator and the implantable pulse generator.

Background

Deep brain stimulators, vagus nerve stimulators, spinal cord nerve stimulators, sacral nerve stimulators, and the like contain a pulse generator and electrode leads. The pulse generator mainly comprises a top cover, a titanium shell and the like, wherein an electric contact piece, a sealing plug, an end sealing ring, a charging coil, an antenna, a screw and the like are arranged in the top cover. The electric contact piece is connected with the electrode wire, the antenna is used for receiving signals, and the charging coil is used for wirelessly charging the pulse generator. The antenna and the charging coil are arranged in the top cover, so that the influence of the titanium shell on signals and charging can be avoided. The charging coil, electrical contacts and antenna need to be electrically connected to the circuit board, typically through a feedthrough wire transition.

The diameters of the charging coil and the feed-through wire are very small, generally 0.1mm-0.5mm, so that the formed connection structure is unstable and easy to fall off.

Disclosure of Invention

The utility model mainly aims to provide a connecting structure of an implantable pulse generator, which is used for solving the problems that a charging coil of the implantable pulse generator is unstable in connection with a feed-through wire and easy to fall off in the related art.

In order to achieve the above object, the present utility model provides a connection structure of an implantable pulse generator, the connection structure is formed between a feed-through wire and a charging coil, the charging coil has a charging coil lead-out end, the feed-through wire has a diameter 1.5-5 times that of the charging coil lead-out end, and the charging coil lead-out end is stacked on the feed-through wire along the length direction of the feed-through wire and is connected with the feed-through wire by at least one laser spot welding.

Further, the charging coil lead-out end is wound on the feed-through wire and is connected with the feed-through wire through at least one laser spot welding.

Further, the head of the charging coil lead-out end is connected with the feed-through wire through laser spot welding, and/or the head of the feed-through wire is connected with the charging coil lead-out end through laser spot welding.

Further, the charging coil lead-out terminal is wound on the feed-through wire in a spiral manner.

Further, the head of the feed-through wire is bent 180 degrees to form a feed-through wire bent portion, and the feed-through wire bent portion is pressed on the charging coil leading-out end and is connected with the feed-through wire non-bent portion through laser spot welding.

Further, a first bending section is arranged between the bending part of the feed-through wire and the non-bending part of the feed-through wire, the bending part of the feed-through wire and the non-bending part of the feed-through wire are connected through laser spot welding at least two positions, and two formed welding spots are respectively positioned at two ends of the spiral part of the leading-out end of the charging coil.

Further, the laser spot welding positions are coated with implantation grade glue to prevent welding spots from falling off.

Further, the coating area of the implant glue comprises the position of a welding spot and the overlapped part of the feed-through wire and the lead-out end of the charging coil.

Further, the implant-grade glue is implant-grade liquid silicone rubber or epoxy resin.

According to another aspect of the present utility model, there is provided an implantable pulse generator, wherein a charging coil is disposed in a top cover of the pulse generator, the charging coil is electrically connected to a circuit board through a feed-through wire, and the connection structure of the implantable pulse generator is formed between the charging coil and the feed-through wire.

In the embodiment of the utility model, the diameter of the feed-through wire is 1.5-5 times of the diameter of the leading-out end of the charging coil, the leading-out end of the charging coil is overlapped on the feed-through wire along the length direction of the feed-through wire and is connected with the feed-through wire through at least one laser spot welding, so that the aim of connecting the feed-through wire with the leading-out end of the charging coil in a mode of overlapping the laser spot welding and increasing the contact area of the feed-through wire and the leading-out end of the charging coil is fulfilled, the connection stability of the feed-through wire and the leading-out end of the charging coil is improved under the condition that a connecting piece is not additionally arranged, the technical effect of reducing the possibility of falling off of the feed-through wire and the charging coil of the implantable pulse generator in the related art is further solved.

Drawings

The accompanying drawings, which are included to provide a further understanding of the utility model, are incorporated in and constitute a part of this specification. The drawings and their description are illustrative of the utility model and are not to be construed as unduly limiting the utility model. In the drawings:

FIG. 1 is a schematic diagram of a connection structure according to an embodiment of the present utility model;

FIG. 2 is a schematic diagram of another connection structure according to an embodiment of the present utility model;

FIG. 3 is an assembled schematic view of another connection structure according to an embodiment of the present utility model;

FIG. 4 is an exploded schematic view of yet another connection structure according to an embodiment of the present utility model;

FIG. 5 is a schematic diagram of yet another connection structure according to an embodiment of the present utility model;

the device comprises a charging coil lead-out end 1, a spiral part 11, an implantation grade glue 2, a welding spot 3, a feed-through wire 4, a feed-through wire non-bending part 401, a feed-through wire bending part 402, a first bending section 403, a metal sleeve 41, a wire body 42 and a 5-shaped rod.

Detailed Description

In order that those skilled in the art will better understand the present utility model, a technical solution in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in which it is apparent that the described embodiments are only some embodiments of the present utility model, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the present utility model without making any inventive effort, shall fall within the scope of the present utility model.

It should be noted that the terms "first," "second," and the like in the description and the claims of the present utility model and the above figures are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged where appropriate in order to describe the embodiments of the utility model herein.

In the present utility model, the azimuth or positional relationship indicated by the terms "upper", "lower", "inner", and the like are based on the azimuth or positional relationship shown in the drawings. These terms are only used to better describe the present utility model and its embodiments and are not intended to limit the scope of the indicated devices, elements or components to the particular orientations or to configure and operate in the particular orientations.

Also, some of the terms described above may be used to indicate other meanings in addition to orientation or positional relationships, for example, the term "upper" may also be used to indicate some sort of attachment or connection in some cases. The specific meaning of these terms in the present utility model will be understood by those of ordinary skill in the art according to the specific circumstances.

Furthermore, the terms "disposed," "configured," "connected," "secured," and the like are to be construed broadly. For example, "connected" may be in a fixed connection, a removable connection, or a unitary construction; may be a mechanical connection, or an electrical connection; may be directly connected, or indirectly connected through intervening media, or may be in internal communication between two devices, elements, or components. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.

In addition, the term "plurality" shall mean two as well as more than two.

It should be noted that, without conflict, the embodiments of the present utility model and features of the embodiments may be combined with each other. The utility model will be described in detail below with reference to the drawings in connection with embodiments.

The pulse generator mainly comprises a top cover, a titanium shell and the like, wherein an electric contact piece, a sealing plug, an end sealing ring, a charging coil, an antenna, a screw and the like are arranged in the top cover. The electric contact piece is connected with the electrode wire, the antenna is used for receiving signals, and the charging coil is used for wirelessly charging the pulse generator. The charging coil, electrical contacts and antenna need to be electrically connected to the circuit board, typically through a feedthrough wire transition. The diameters of the charging coil and the feed-through wire are very small, generally 0.1mm-0.5mm, so that the formed connecting structure is unstable and easy to fall off.

In order to solve the above technical problems, the embodiments of the present utility model provide a connection structure of an implantable pulse generator, where the connection structure is formed between a feed-through wire 4 and a charging coil, the charging coil has a charging coil lead-out terminal 1, the diameter of the feed-through wire 4 is 1.5-5 times that of the charging coil lead-out terminal, and the charging coil lead-out terminal 1 is stacked on the feed-through wire 4 along the length direction of the feed-through wire 4 and is connected with the feed-through wire 4 by at least one laser spot welding. The implantable pulse generator may be a cardiac pacemaker, a defibrillator, and/or a neuromodulation device. In this embodiment, the diameter of the feed-through wire 4 is designed to be 1.5-5 times of the wire diameter of the charging coil lead-out terminal 1, so that the charging coil lead-out terminal 1 can be conveniently stacked on the side surface of the feed-through wire 4 on the basis of meeting the strength requirement of the charging coil lead-out terminal 1, thereby facilitating the subsequent welding operation and the stable formation of welding spots.

Specifically, the charging coil lead-out terminal 1 is stacked on the feed-through wire 4 along the length direction of the feed-through wire 4, and the axial direction of the charging coil lead-out terminal may be parallel to the axial direction of the feed-through wire. It should be understood that the present utility model proposes various configurations of the charging coil terminal 1, including: a straight-line structure as shown in fig. 1, a spiral structure as shown in fig. 2-5, etc. Here, the axial direction of the charging coil terminal 1 is understood to be the axial direction of the overall shape thereof, for example, the wire axial direction of the linear charging coil terminal, the spiral center axial direction of the spiral charging coil terminal, and the like, corresponding to the charging coil terminals 1 of different shapes. The material of the feed-through wire 4 is a metal material such as platinum iridium alloy or niobium, and the material of the charging coil is a metal material such as gold, copper or gold-clad copper (copper-plated), gold-plated copper, silver-clad copper, or platinum. The feed-through wire 4 is used as a connection base of the charging coil, and in order to enable the feed-through wire 4 to provide a sufficient connection area, the diameter of the feed-through wire 4 is set to be larger than the wire diameter of the charging coil lead-out terminal 1 in this embodiment, specifically, the diameter of the feed-through wire 4 is 1.5-5 times the wire diameter of the charging coil lead-out terminal 1. For example, the diameter of the lead wire of the charging coil terminal 1 is about 0.1mm, and the diameter of the feed-through lead wire 4 is 0.15 to 0.5mm, preferably 0.4mm.

After the feed-through wire 4 and the charging coil terminal 1 are formed in a stacked structure, both have a certain overlap length in the axial direction of the feed-through wire 4, and the overlap length may be 2 to 10mm, preferably 3 to 6mm. The sufficient overlapping length enables sufficient contact between the feed-through wire 4 and the charging coil lead-out terminal 1, so that the operation of performing laser spot welding fixed connection on the charging coil lead-out terminal 1 and the feed-through wire 4 in a small assembly space is facilitated.

Taking the linear charging coil lead-out terminal 1 as shown in fig. 1 as an example, the welding position may be one or more, and when one welding position is selected, it is preferable to weld the head of the charging coil lead-out terminal 1 with the feed-through wire 4; when a plurality of welding positions are selected, it is preferable that at least the head of the charging coil lead-out terminal 1 and the feed-through wire 4 and the head of the feed-through wire 4 and the charging coil lead-out terminal 1 are welded, so that welding spots 3 are formed at both ends of the overlapping portions of the two, so that the feed-through wire 4 and the charging coil lead-out terminal 1 have a stable connection; meanwhile, for more welding positions, at least one welding position can be selected to form a welding spot 3 at the middle part where the two welding positions overlap on the basis of the two welding positions.

Compared with the mode of direct butt connection between the head of the feed-through wire and the leading-out end of the charging coil in the related art, the connecting structure of the feed-through wire 4 and the leading-out end of the charging coil 1 in the embodiment can better resist axial and radial tensile force, effectively improve the stability of the connecting structure and better prevent the feed-through wire 4 and the leading-out end of the charging coil 1 from falling off.

On the basis of the connection structure mentioned in the above embodiment, this embodiment provides another more specific connection structure.

As shown in fig. 2, in the present embodiment, the charging coil lead-out terminal 1 is wound around the feed-through wire 4 and is connected to the feed-through wire 4 by at least one laser spot welding. The charging coil lead-out terminal 1 is connected with the feed-through wire 4 in a winding manner, and compared with the structure that the linear charging coil lead-out terminal 1 is axially and parallelly stacked on the feed-through wire 4 as shown in fig. 1, the spiral charging coil lead-out terminal 1 can further prevent the charging coil lead-out terminal 1 from being separated from the feed-through wire 4, and even if a welding spot is separated, the charging coil lead-out terminal 1 wound on the feed-through wire 4 can be kept connected/contacted with the feed-through wire 4 without causing failure. In the present embodiment, the welding position of the feed-through wire 4 and the charging coil terminal 1 may be the welding position described in the above embodiment.

The way the charging coil terminal 1 is wound on the feed-through wire 4 will affect the connection strength of the two. In this embodiment, the charging coil lead-out terminal 1 is in a spiral shape; specifically, as shown in fig. 2, the charging coil lead-out terminal 1 has a spiral portion 11, the spiral portion 11 is spirally wound around the feed-through wire 4, and the charging coil lead-out terminal 1 may be spirally wound around the feed-through wire 4 from bottom to top and laser spot-welded to the feed-through wire 4 at the head of the charging coil lead-out terminal 1. Of course, after the head of the charging coil lead-out terminal 1 and the feed-through wire 4 are fixed by laser spot welding, the charging coil lead-out terminal 1 may be wound around the feed-through wire 4 in a spiral manner from bottom to top. This has the advantage that if the connection is subjected to external forces, the forces do not directly act on the solder joint 3, so that the solder joint 3 is prevented from falling off and failing. Alternatively, in addition to the welding of the head of the charging coil lead-out terminal 1 with the feed-through wire 4, as shown in fig. 2, the charging coil lead-out terminal 1 may be welded with the head of the feed-through wire 4, thereby forming two welding spots 3 distributed at the upper and lower ends of the spiral portion 11, and the winding of the charging coil lead-out terminal 1 can be prevented from being scattered.

In addition to the manner in which the charging coil lead-out terminal 1 is directly spirally wound around the feed-through wire 4 from bottom to top, as shown in fig. 3, the charging coil lead-out terminal 1 may be spirally wound around the shaping rod 5 to be pre-shaped, thereby forming the spiral portion 11. The shaping bar 5 may be a metal bar with a diameter that is the same as or slightly larger than the diameter of the feed-through wire 4. The shaped charging coil lead-out terminal 1 can be directly sleeved on the feed-through wire 4 and welded with the feed-through wire 4 at least at the head of the charging coil lead-out terminal 1. By using the shaped bars 5, no winding on the feed-through wire 4 is necessary, and damage to the feed-through of the device or the feed-through wire 4 by the winding operation can be avoided.

The present embodiment provides still another connection structure on the basis that the charging coil lead-out terminal 1 is wound around the feed-through wire 4.

As shown in fig. 4, in this embodiment, the feed-through wire 4 is composed of two parts, one part is a metal sleeve 41, the other part is a wire body 42, the charging coil lead-out terminal 1 is wound on the metal sleeve 41 in a spiral manner, the winding manner is the same as that of the charging coil lead-out terminal 1 and the feed-through wire 4 in the above embodiment, the head of the charging coil lead-out terminal 1 is fixed with the metal sleeve 41 by laser spot welding, and then the metal sleeve 41 wound with the charging coil lead-out terminal 1 is sleeved on the wire body 42. The metal sleeve 41 may be provided in a hollow cylindrical shape with an inner diameter the same as or slightly larger than the outer diameter of the wire body. When the metal sleeve 41 is sleeved on the wire body 42, the metal sleeve 41 and the wire body 42 can be closely contacted, and finally the metal sleeve 41 and the wire body 42 are connected through laser spot welding. In another embodiment, in addition to the welding of the head of the charging coil lead-out terminal with the metal sleeve 41, the charging coil lead-out terminal 1 may be welded with the head of the metal sleeve 41 or the head of the wire body 42, thereby forming two welding spots 3 distributed at the upper and lower ends of the winding portion (the spiral portion 11), and the winding of the charging coil lead-out terminal 1 can be prevented from being scattered.

On the basis that the charging coil lead-out terminal 1 is wound on the feed-through wire 4, in order to further improve the connection strength between the charging coil lead-out terminal 1 and the feed-through wire 4, the present embodiment provides a further connection structure.

As shown in fig. 5, in this embodiment, the charging coil lead-out terminal 1 is wound on the feed-through wire 4 in a spiral manner, the head of the feed-through wire 4 extends from the spiral portion 11 of the charging coil lead-out terminal 1 by a length, the head of the charging coil lead-out terminal 1 is connected to the feed-through wire 4 by laser spot welding, the portion of the feed-through wire 4 extending from the spiral portion 11 is bent 180 ° and then pressed against the charging coil lead-out terminal 1, and the bent portion 402 of the feed-through wire is connected to the non-bent portion 401 of the feed-through wire by laser spot welding. In this embodiment, the charge coil lead-out terminal 1 is pressed by the bent portion 402 of the feed-through wire, so that the charge coil lead-out terminal 1 wound on the feed-through wire 4 can be further prevented from being scattered, and the bent portion 402 of the feed-through wire and the non-bent portion 401 of the feed-through wire are welded and fixed, so that the bent portion 402 of the feed-through wire can be prevented from rebounding, and the connection stability between the charge coil lead-out terminal 1 and the feed-through wire 4 can be further improved. In the present embodiment, the solder 3 does not need to be provided at the upper end of the body of the screw 11, but the charging coil lead-out terminal 1 is prevented from being scattered by the wire bent portion 402 pressing the charging coil lead-out terminal 1. The advantage of doing so is, when avoiding charging coil leading-out end 1 to scatter, also can improve charging coil leading-out end 1's ductility through the connection mode to charging coil leading-out end 1 upper end relative flexibility to reduce charging coil leading-out end 1 and take place the fracture possibility in the upper end of its body. Since the resilience of the bent portion of the feed-through wire is provided by the first bending section 403 at the upper end of the feed-through wire 4, in order to better avoid the rebound after bending the feed-through wire 4, at least two welding spots 3 are formed between the bent portion 402 of the feed-through wire and the non-bent portion 401 of the feed-through wire in the present embodiment. The formed welding spots 3 are at least respectively positioned at two ends of the spiral part 11 of the charging coil leading-out terminal 1, one welding spot 3 is relatively close to the first bending section 403, and the other welding spot 3 is relatively far away from the first bending section 403. Therefore, the bent part 402 of the feed-through wire between the two welding spots 3 can be tightly sleeved outside the spiral part 11 of the charging coil lead-out terminal 1 of the non-bent part 401 of the feed-through wire, so that the charging coil lead-out terminal 1 is prevented from being scattered, and external force is better overcome.

On the basis of the above connection structures of the feed-through wires 4 and the charging coil lead-out terminals 1, in order to further improve the connection strength of the feed-through wires and the charging coil lead-out terminals, the position of the welding spot 3 is further coated with the implantation grade glue 2 to prevent the welding spot 3 from falling off. Further, the implant-grade glue 2 is implant-grade liquid silicone rubber or epoxy resin.

The present embodiment provides still another connection structure. As shown in fig. 1, besides the laser spot welding fixed connection is performed on the head of the charging coil lead-out terminal 1 and the feed-through wire 4 to form the welding spot 3, the implantation grade glue 2 is coated to enable the charging coil lead-out terminal 1 and the feed-through wire 4 to be additionally fixed in an adhesive manner on the basis of welding. The coated area of the implant glue comprises the overlapping portion of the feed-through wire 4 and the charging coil outlet 1. In this embodiment, the solder joint 3 is not required to be disposed at the upper end of the body of the charging coil lead-out terminal, but is fixed by implantation of the glue. The advantage of doing so is, when strengthening connection structure fixed strength, also can improve connection structure's ductility through the connection mode to charging coil leading-out end 1 upper end relative flexibility to reduce the external force that directly acts on solder joint 3.

According to another aspect of the present utility model, there is provided an implantable pulse generator comprising the connection structure of the implantable pulse generator described above.

The above description is only of the preferred embodiments of the present utility model and is not intended to limit the present utility model, but various modifications and variations can be made to the present utility model by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model should be included in the protection scope of the present utility model.

Claims (10)

1. The connecting structure of the implantable pulse generator is formed between a feed-through wire and a charging coil, and is characterized in that the charging coil is provided with a charging coil leading-out end, the diameter of the feed-through wire is 1.5-5 times that of the charging coil leading-out end, and the charging coil leading-out end is stacked on the feed-through wire along the length direction of the feed-through wire and is fixedly connected with at least one position of the feed-through wire.

2. The connection structure of an implantable pulse generator according to claim 1, wherein the charging coil lead-out terminal is wound around the feed-through wire and is connected to the feed-through wire by at least one laser spot welding.

3. The connection structure of an implantable pulse generator according to claim 2, wherein a head of the charging coil lead-out terminal is connected to the feed-through wire by laser spot welding, and/or a head of the feed-through wire is connected to the charging coil lead-out terminal by laser spot welding.

4. The connection structure of an implantable pulse generator according to claim 2, wherein the charging coil lead-out terminal is spirally wound on the feed-through wire.

5. The connection structure of an implantable pulse generator according to any one of claims 2 to 4, wherein a bent portion of the feed-through wire is formed by bending a head portion of the feed-through wire 180 ° and pressed against the charging coil lead-out terminal and is connected to an unflexed portion of the feed-through wire by laser spot welding.

6. The connection structure of an implantable pulse generator according to claim 5, wherein a first bending section is provided between the bent portion of the feed-through wire and the non-bent portion of the feed-through wire, the bent portion of the feed-through wire and the non-bent portion of the feed-through wire are connected by laser spot welding at least two positions, and two welding spots are formed at two ends of the spiral portion of the charging coil lead-out terminal, respectively.

7. The connection structure of an implantable pulse generator according to claim 2 or 6, wherein the laser spot-welded position is coated with an implant-grade glue to prevent the welding spot from falling off.

8. The connection structure of an implantable pulse generator of claim 7, wherein the coating area of the implant-grade glue includes a location of a solder joint and an overlapping portion of the feedthrough wire and the charging coil lead-out.

9. The connection structure of an implantable pulse generator of claim 8, wherein the implant-grade glue is an implant-grade liquid silicone rubber or an epoxy.

10. An implantable pulse generator, characterized in that a charging coil is arranged in a top cover of the pulse generator, the charging coil is electrically connected with a circuit board through a feed-through wire, and a connecting structure of the implantable pulse generator as claimed in any one of claims 1 to 9 is formed between the charging coil and the feed-through wire.