CN110732083A - Medical connector and pulse generator for connecting medical instruments - Google Patents

Abstract

The invention discloses a medical connector for connecting medical instruments, comprising a connector body, the connector body is provided with a threading through hole for extending wires to pass through, and the connector body is provided with an elastic contact part and a deformation The deformation channel is communicated with the threading through hole, and the elastic contact part has a protruding abutting part; The outgoing abutting portion protrudes into the threading through hole along the deformation channel; after the extending wire is inserted into the threading through hole, the extending wire presses the elastic contact portion, and the protruding abutting portion abuts the conductive ring of the extending wire, The protruding abutting portion retracts from the threading through hole toward the deformation channel. The medical connector of the present invention can stably and reliably fix the extension wire, realize good conduction performance between the extension wire and the pulse generator, and can reduce the straightness requirement for the extension wire after use.

Description

Medical connectors and pulse generators for connecting medical devices

technical field

The invention relates to a medical connector for connecting medical instruments, and also relates to a pulse generator used in an implantable nerve electrical stimulation system.

Background technique

The electrical nerve stimulation system plays an important role in the treatment of nerve dysfunction and the rehabilitation of nerve injury. The implantable electrical nerve stimulation system releases high-frequency electrical stimulation by implanting electrodes at specific nerves in the human body, such as motor nerves and sensory nerves, to stimulate specific nerves, thereby restoring human body functions to a normal operating state. At present, implantable electrical nerve stimulation systems mainly include implantable deep brain stimulation (DBS), implantable cerebral cortex stimulation (CNS), implantable spinal cord stimulation system (SCS), implantable sacral nerve stimulation System (SNS), Implantable Vagus Nerve Stimulation System (VNS), etc.

Known implantable electrical nerve stimulation systems include a pulse generator, electrodes and extension leads implanted in the body, and a controller located outside the body. The connecting head of the pulse generator has a connecting block, the pulse generator is connected to the extension wire through the connection block, and the extension wire is connected to the electrode, so that the pulse generated by the pulse generator is transmitted to the electrode to electrically stimulate the nerve .

For the connection between the connection block and the extension wire (or extension wire), the known implantable electrical nerve stimulation system usually adopts the screw fixation method. A threaded hole through which the hole is penetrated, a screw is screwed into the threaded hole, and the end plane of the screw presses the conductive ring of the extending wire, so as to realize contact conduction. This fixing method of the extension wire has the following defects: (1) The tightness of the screw will cause the change of the contact impedance, thereby affecting the conduction performance between the pulse generator and the extension wire, and affecting the normal use of the product; (2) ) The screw has the risk of loosening under the influence of long-term vibration factors, which will lead to open circuit and make the product fail; (3) There is a single-point contact between the screw and the extension wire, and when the straightness of the conductive ring of the extension wire is not good, the Affect the conduction performance of the extension wire; (4) Over-tightening of the screw will cause the extension wire to be deformed under pressure, resulting in damage to the product.

SUMMARY OF THE INVENTION

The technical problem to be solved by the present invention is to provide a medical connector for connecting medical instruments, which can connect the extension wire stably and reliably, realize good conduction performance between the extension wire and the pulse generator, and reduce the impact on the extension wire after use. Straightness requirements.

In order to solve the above technical problems, the present invention provides a medical connector for connecting medical instruments, including a connector body, the connector body is provided with a threading through hole for extending the wire to pass through, and the connector body is provided with an elastic contact part and a deformation channel, the deformation channel communicates with the threading through hole, and a protruding abutment part is arranged on the elastic contact part;

Before the extending wire is inserted into the threading through hole, the elastic contact portion is in a natural state or is compressed, and the protruding abutting portion extends into the threading through hole along the deformation channel;

After the extension wire is inserted into the threading through hole, the extension wire presses the elastic contact portion, the protruding abutting portion abuts the conductive ring of the extending wire, and the protruding abutting portion goes from the threading through hole to the deformation channel direction retraction.

In a preferred embodiment of the present invention, it further includes that the connector body is provided with at least two elastic contact parts around the through hole.

In a preferred embodiment of the present invention, it further includes that the deformation channel is provided with a one-way stopper, and the one-way stopper limits the movement of the protruding abutting part from the deformation channel to the threading through hole. , so that part of the protruding abutting portion extends into the threading through hole.

In a preferred embodiment of the present invention, it further includes that the diameter of the passage where the deformation passage communicates with the threading through hole is smaller than the maximum outer diameter of the protruding abutting portion.

In a preferred embodiment of the present invention, it further includes that one end of the elastic contact portion is fixed on the connector body, the other end extends freely, and the protruding abutting portion is fixed on the freely extending end of the elastic contact portion; The protruding abutting portion is a spherical body structure.

In a preferred embodiment of the present invention, it further includes that both ends of the elastic contact portion are fixed on the connector body, and the body of the elastic contact portion has the protruding abutting portion.

In a preferred embodiment of the present invention, it further includes that the protruding abutting portion has an end portion for abutting against the conductive ring, and the end portion has a profiling structure matching the outer shape structure of the conductive ring.

In a preferred embodiment of the present invention, it further includes that the connector body is provided with a cavity on the outer side of the threading through hole, the cavity is provided with a connecting arm, and the connecting arm divides the cavity into a plurality of accommodating cavity, the elastic contact part is arranged in the accommodating cavity.

In a preferred embodiment of the present invention, the accommodating cavity is further provided with a guide sleeve, the guide sleeve has a central through hole penetrating in the axial direction, and the extension direction of the central through hole is the same as that of the threading through hole. The radial directions are the same, and the elastic contact portion is penetrated in the central through hole.

In order to solve the above technical problems, the present invention also provides a pulse generator for an implantable electrical nerve stimulation system, including the medical connector of the above structure for connecting to a medical device.

The medical connector for connecting medical instruments of the present invention can connect the extension wire stably and reliably, realize good conduction performance between the extension wire and the pulse generator, and can reduce the straightness requirement for the extension wire after use.

Description of drawings

Fig. 1 is the structure schematic diagram of extension wire;

Figure 2 is a schematic three-dimensional structure diagram of a medical connector in a preferred embodiment of the present invention;

Fig. 3 is the top-view structure schematic diagram of the medical connector in Fig. 2;

Fig. 4 is the sectional structure schematic diagram of A-A direction in Fig. 3;

Fig. 5 is the partial enlarged schematic diagram of B part in Fig. 4;

6 is a schematic structural diagram of an elastic contact portion in a second embodiment of the present invention;

FIG. 7 is a schematic structural diagram of using the medical connector in the preferred embodiment of the present invention to connect the extension lead to the pulse generator.

Among them: 1-connection block, 3-screw;

2-connector body, 4-extension wire, 6-through hole, 8-elastic contact part, 10-protruding abutment part, 12-conductive ring, 14-deformation channel, 16-accommodating cavity, 18-orifice , 20-pulse generator body, 22-connector, 24-connecting arm.

Detailed ways

The present invention will be further described below with reference to the accompanying drawings and specific embodiments, so that those skilled in the art can better understand the present invention and implement it, but the embodiments are not intended to limit the present invention.

Example 1

FIG. 1 shows a schematic structural diagram of the extension wire 4 to be connected with the pulse generator. The extension wire 4 has a conductive ring 12 forming a conductive terminal.

As shown in Figures 2-5, this embodiment discloses a medical connector for connecting medical instruments, which is used to connect the extension wire 4 shown in Figure 1 to the connector of the pulse generator, which includes a connector body 2, the above-mentioned connector body 2 is provided with a threading through hole 6 for extending the wire 4 to penetrate, the above-mentioned connector body 2 is provided with an elastic contact portion 8 and a deformation channel 14, and the above-mentioned deformation channel 14 is communicated with the threading through hole 6, The above-mentioned elastic contact portion 8 has a protruding abutment portion 10 .

In the technical solution of this embodiment, one end of the above-mentioned elastic contact portion 8 is fixed on the connector body 2, and the protruding abutting portion 10 is fixed on the other end of the elastic contact portion 8. In the technical solution of this embodiment, the above-mentioned elastic contact portion 8 Preferably but not limited to a coil spring, one end of the coil spring is welded and fixed on the connector body 2 , and the protruding abutting portion 10 is welded and fixed on the other end of the connector body 2 .

It should be noted here that the abutting portion 10 may be a part of the elastic contact portion 8 , or may be provided separately from the elastic contact portion 8 and fixed on the elastic contact portion 8 . In the technical solution of this embodiment, the preferred solution is: the abutting part 10 is provided separately from the elastic contact part 8 , preferably but not limited to a spherical body structure, and the abutting part 10 of the spherical body structure is fixed on the elastic contact part 8 .

Before the above-mentioned extension wire 4 penetrates into the threading through hole 6: the above-mentioned elastic contact portion 8 is in a natural state or is compressed, and the above-mentioned protruding abutting portion 10 extends into the threading through hole 6 along the deformation channel 14;

After the extension wire 4 is inserted into the threading through hole 6: the extension wire 4 presses the elastic contact part 8, the protruding abutting part 10 abuts the conductive ring 12 of the extension wire 4, and the protruding abutting part 10 is self-penetrating The hole 6 is retracted in the direction of the deformation channel 14 . The protruding abutting portion 10 retracts to compress or compresses the elastic contact portion 8 again. The protruding abutting portion 10 abuts against and compresses the conductive ring 12 under the action of the reverse pressing force of the elastic contact portion 8 , and conducts electrical conduction with the conductive ring 12 . Pass.

The elastic contact portion 8 elastically contacts the conductive ring 12 of the extending wire 4 , which can effectively ensure a reliable electrical connection between the protruding abutting portion 10 and the conductive ring for a long time compared with the conventional rigid contact.

In the technical solution of this embodiment, the above-mentioned elastic contact parts 8 have at least two arranged around the above-mentioned threading through holes 6. As shown in FIG. 2, there are but not limited to four elastic contact parts 8 with the same structure. After entering the threading hole 6, the protruding abutting parts 10 of the four elastic contact parts 8 all wrap around the extending wire 4 to abut and press the conductive ring 12, and form multi-point contact with the conductive ring 12, forming a multi-point contact with the conductive ring 12. Conduction is more stable and reliable than single-point contact; at the same time, the design of multi-point contact can reduce the straightness requirements for the extension wire, even if the straightness of the extension wire is not good, or the surface is concave The pit can also be contacted and turned on. In particular, the plurality of elastic contact portions 8 are symmetrically arranged around the axis of the threading through hole 6, that is, the plurality of elastic contact portions 8 are arranged symmetrically around the extending wire 4 at the periphery thereof, and a plurality of protruding contact portions abut against each other. The symmetrical distribution of the parts 10 can balance the abutting force on the extension wires 4 , and the protruding abutting parts 10 can more stably contact the conductive ring 12 .

In order to adjust the elastic force of the coil spring, according to the actual elastic force requirements, the pitch of the coil spring can be designed to be the same, or gradually decrease or increase in a certain direction.

The above-mentioned protruding abutting portion 10 is preferably, but not limited to, a spherical structure made of metal. In order to abut the conductive ring 12 more closely, the above-mentioned protruding abutting portion 10 has an end portion for abutting the conductive ring 12 . The above-mentioned end portion has a profiling structure that matches the outer shape of the conductive ring 12 . For example, a profiling groove is provided on the end, and when the conductive ring 12 is contacted, the profiling groove embraces the conductive ring 12; The profiled protrusion is surrounded by the wire groove.

Specifically, the connector body 2 is provided with a cavity on the outer side of the threading through hole 6, and the cavity is provided with a connecting arm 24, the connecting arm 24 divides the cavity into a plurality of accommodating cavities 16, and the elastic contact portion The elastic contact part 8 is arranged in the accommodating cavity 16, one end of the elastic contact part 8 is welded on the cavity wall of the accommodating cavity 16, the other end of the elastic contact part 8 extends freely, and the protruding abutting part 10 is welded to the freely extending end. Of course, when correspondingly accommodating a plurality of elastic contact parts 8 , the connector body 2 is provided with a plurality of accommodating cavities 16 around the threading through hole 6 , and the plurality of the elastic contact parts 8 are arranged in the accommodating cavity 16 in a one-to-one correspondence. .

As a further improvement of the present invention, the deformation channel 14 is provided with a one-way stopper, and the one-way stopper limits the movement of the protruding abutting portion 10 from the deformation channel 14 to the threading through hole 6, so that Part of the above-mentioned protruding abutting portion 10 extends into the threading through hole 6 . The one-way limiter has one-way limitability: the protruding abutting part 10 moves from the deformation channel 14 to the threading through hole 6 to limit the movement, while the movement from the threading through hole 6 to the deformation channel 14 does not limit the movement, ensuring that Only part of the protruding abutting portion 10 extends into the threading through hole 6 before the extension wire penetrates into the threading through hole 6 , and the protruding abutting portion 10 can compress the elastic contact portion without restriction under the action of the extrusion force of the extending wire 4 8. In this way, it is possible to prevent the protruding abutting portion 10 from fully protruding into the threading through hole 6 . Once the protruding abutting portion 10 is completely inserted into the threading through hole 6 , the protruding abutting portion 10 cannot be reset smoothly after the extension wire 4 is inserted.

In the technical solution of this embodiment, a preferred but not limited implementation solution of the one-way stopper is: as shown in FIG. Maximum outer diameter.

Of course, according to the actual needs of use, the one-way limiting part can also be other technical solutions: the deformation channel 14 is a straight channel with the same inner diameter, and the elastic contact part 8 is designed to protrude from the abutment part 10 in a natural state only partially extends into the threading In the through hole 6 , the extension wire 4 can also be smoothly reset after passing through the through hole.

In order to constrain the deformation trajectory of the elastic contact portion 8, a guide sleeve (not shown) is provided in the accommodating cavity 16. The guide sleeve has a central through hole penetrating in the axial direction. The radial directions are the same, and the elastic contact portion 8 is penetrated in the central through hole. The elastic contact portion 8 is constrained from radially reciprocating linear movement along the threading through hole 6 by means of the guide sleeve.

Embodiment 2

This embodiment discloses a medical connector for connecting medical instruments. Another implementation of the elastic contact portion 8 is shown in this embodiment. As shown in FIG. 6 , the elastic contact portion 8 is preferably, but not limited to, elastic contact portions. In the structure of the plate and the elastic piece, both ends of the elastic contact portion 8 are fixed on the connector body 2 , and the body of the elastic contact portion 8 has the protruding abutting portion 10 .

Of course, one end of the elastic contact portion 8 can also be designed to be fixed on the connector body 2 while the other end is free, and the body of the elastic contact portion 8 is provided with a protruding abutting portion 10 .

Embodiment 3

As shown in FIG. 7, an embodiment of a pulse generator for an implantable electrical nerve stimulation system is disclosed, including a pulse generator body 20, an extension lead 4 and a connector 22 of the above structure, one end of the above-mentioned extension lead 4 It is fixed on the pulse generator body 20 through the connector 22, and the other end is connected to the electrode.

Corresponding to the extension wire 4 shown in FIG. 1 , four or more connectors 22 are used to connect and conduct the four conductive rings 12 of the extension wire 4 respectively. 1 is fixed, the connection block 1 is provided with a through hole for the extension wire 4 to pass through, and the connection block 1 is also provided with a threaded hole with a communication hole. Fix the limit to prevent the extension wire from moving in the axial direction.

After using the connector in the first embodiment or the second embodiment to connect the extension wire 4, after connecting to the pulse generator body 20, the extension wire 4 can be connected to the pulse generator body stably and reliably, so as to realize the electrode and the pulse generator. The good conduction performance between them can reduce the straightness requirements for the extended wires after use.

The above-mentioned embodiments are only preferred embodiments for fully illustrating the present invention, and the protection scope of the present invention is not limited thereto. Equivalent substitutions or transformations made by those skilled in the art on the basis of the present invention are all within the protection scope of the present invention. The protection scope of the present invention is subject to the claims.

Claims (10)

1. A medical connector for connecting medical instruments, comprising a connector body, the connector body is provided with a threading through hole for extending wires to pass through, and it is characterized in that: the connector body is provided with an elastic contact portion and a deformation channel, the deformation channel communicates with the threading through hole, and the elastic contact portion is provided with a protruding abutting portion; Before the extending wire is inserted into the threading through hole, the elastic contact portion is in a natural state or is compressed, and the protruding abutting portion extends into the threading through hole along the deformation channel; After the extension wire is inserted into the threading through hole, the extension wire presses the elastic contact portion, the protruding abutting portion abuts the conductive ring of the extending wire, and the protruding abutting portion goes from the threading through hole to the deformation channel direction retraction. 2 . The medical connector for connecting medical instruments according to claim 1 , wherein the connector body is provided with at least two elastic contact parts around the threading through hole. 3 . 3 . The medical connector for connecting medical instruments according to claim 1 , wherein a one-way stopper is provided in the deformation channel, and the one-way stopper is self-deforming to the protruding abutting part. 4 . The movement in the direction of the threading through hole is limited, so that part of the protruding abutting part extends into the threading through hole. 4 . The medical connector for connecting medical devices according to claim 3 , wherein the diameter of the passage where the deformation passage communicates with the threading through hole is smaller than the maximum outer diameter of the protruding abutting portion. 5 . 5 . The medical connector for connecting medical instruments according to claim 1 , wherein one end of the elastic contact portion is fixed on the connector body, the other end extends freely, and the protruding abutting portion is fixed on the connector body. 6 . on the freely extending end of the elastic contact portion; the protruding abutting portion is a spherical body structure. 6 . The medical connector of claim 1 , wherein both ends of the elastic contact portion are fixed on the connector body, and the body of the elastic contact portion has the protrusions. 7 . abutment. 7 . The medical connector of claim 5 , wherein the protruding abutting portion has an end portion for abutting the conductive ring, and the end portion has an outer shape matching the conductive ring. 8 . copy structure. 8 . The medical connector for connecting medical instruments according to claim 5 , wherein the connector body is provided with a cavity at the outer side of the threading through hole, and a connecting arm is provided in the cavity. 9 . The connecting arm divides the cavity into a plurality of accommodating cavities, and the elastic contact portion is arranged in the accommodating cavities. 9 . The medical connector for connecting medical instruments according to claim 8 , wherein a guide sleeve is arranged in the accommodating cavity, and the guide sleeve has a central through hole penetrating in the axial direction, and the center The extending direction of the through hole is the same as the radial direction of the threading through hole, and the elastic contact portion is penetrated in the central through hole. 10. A pulse generator for an implantable electrical nerve stimulation system, characterized in that it comprises a medical connector for connecting a medical device according to any one of claims 1-9.

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