Electronics assembly for implantable medical device

Patent metadata

Field	Value
Publication number	US-2021121705-A1
Application number	US-202017071463-A
Country	US
Kind code	A1
Filing date	Oct 15, 2020
Priority date	Oct 29, 2019
Publication date	Apr 29, 2021
Grant date	—

Abstract

In some examples, an implantable medical device includes a battery, an electronics module electrically connected to the battery, and an elongated housing comprising a side wall positioned between the battery and an end cap, wherein the electronics module is positioned within the elongated housing between the battery and the end cap. The implantable medical device also includes an electrical contact assembly comprising a first spring contact and a second spring contact. The electrical contact assembly of the implantable medical device is positioned within the elongated housing between the electronics module and the battery or the end cap.

First claim

What is claimed is:

1 . An implantable medical device comprising:
a battery; an electronics module electrically connected to the battery; an elongated housing comprising a side wall positioned between the battery and an end cap, wherein the electronics module is positioned within the elongated housing between the battery and the end cap; and an electrical contact assembly comprising a first spring contact and a second spring contact, wherein the electrical contact assembly is positioned within the elongated housing between the electronics module and the battery or is positioned within the elongated housing between the electronics module and the end cap.

2 . The device of claim 1 , further comprising a battery header and an electrical feedthrough electrically connected to the battery and extending through the battery header, wherein the electrical contact assembly is positioned between the electronics module and the battery header and electrically connected to the electrical feedthrough and the electronics module.

3 . The device of claim 2 , wherein the electrical contact assembly is a first electrical contact assembly, wherein the electrical feedthrough is a first electrical feedthrough, and further comprising:
a second electrical feedthrough extending through the end cap, and a second electrical contact assembly comprising a third spring contact and a fourth spring contact, wherein the second electrical contact assembly is positioned within the housing between the electronics module and the end cap and electrically connected to the second electrical feedthrough and the electronics module, and wherein at least one of the first, second, third, or fourth spring contacts is permanently attached to the electronics module.

4 . The device of claim 1 , wherein the electrical contact assembly further comprises an insulative backing, wherein the first and second spring contacts are mounted to the insulative backing, and wherein each of the first and second spring contacts comprises a contact arm biased away from the insulative backing.

5 . The device of claim 4 , wherein each of the first and second spring contacts comprise a plurality of contact arms biased away from the insulative backing.

6 . The device of claim 4 , wherein the contact arm comprises an electrically conductive plating.

7 . The device of claim 4 , wherein an end of the contact arm comprises a raised contact surface.

8 . The device of claim 1 , further comprising an electrical feedthrough extending through the end cap, wherein the electrical contact assembly is positioned between the electronics module and the end cap and electrically connected to the electrical feedthrough and the electronics module.

9 . The device of claim 1 ,
wherein the electric contact assembly further comprises a third spring contact and a fourth spring contact, and wherein the first, second, third, and fourth spring contacts are pressed against the electronics module.

10 . The device of claim 1 , further comprising an electrode positioned on an exterior of the device and electrically isolated from the elongated housing,
wherein the first spring contact is electrically connected to the elongated housing, wherein the second spring contact is electrically connected to the electrode, and wherein the first spring contact is electrically isolated from the second spring contact.

11 . The device of claim 1 , further comprising an electrode positioned on an exterior of the device and electrically isolated from the elongated housing,
wherein the first spring contact is electrically connected to the second spring contact, wherein the first spring contact is electrically connected to the electrode, and wherein the first spring contact and the second spring contact are electrically isolated from the elongated housing.

12 . An implantable medical device comprising:
a battery; a battery header; a first feedthrough electrically connected to a pole of the battery and extending through the battery header; an elongated housing comprising a side wall positioned between the battery header and an end cap; an electrical contact assembly mounted to the battery header and comprising a first spring contact and a second spring contact, wherein the first spring contact is electrically connected to the first feedthrough; and an electronics module positioned within the housing between the battery header and the end cap, wherein the electronics module is pressed against the first and second spring contacts of the electrical contact assembly, whereby the electronics module is electrically connected to the battery.

13 . The device of claim 12 , wherein each of the first and second spring contacts comprises a contact arm biased away from the battery header.

14 . The device of claim 13 , wherein the electronics module has a first end facing the battery header and a second end facing the end cap, and wherein the first end comprises a first contact area and a second contact area, wherein the contact arm of the first spring contact is pressed against and in electrical contact with the first contact area, and wherein the contact arm of the second spring contact is pressed against and in electrical contact with the second contact area.

15 . The device of claim 14 , wherein the electronics module further comprises a circuit board with a first edge at the first end of the electronics module and a second edge at the second end of the electronics module, wherein the first contact area comprises a first electrically conductive area of the first edge and the second contact area comprises a second electrically conductive area of the first edge.

16 . The device of claim 13 , wherein the electronics module further comprises an electrically insulative housing mounted to a circuit board, the insulative housing comprising a first end wall facing the battery header and a second end wall facing the end cap, wherein the first contact area comprises a first metalized area of the first end wall and the second contact area comprises a second metalized area of the first end wall.

17 . The device of claim 12 , wherein each of the first and second spring contacts comprises a plurality of contact arms biased away from the battery header.

18 . The device of claim 12 , wherein the contact arm comprises an electrically conductive plating.

19 . The device of claim 12 , wherein an end of the contact arm comprises a raised contact surface.

20 . The device of claim 12 , further comprising a second feedthrough electrically connected to the electronics module and extending through the end cap.

21 . The device of claim 20 , wherein the electrical contact assembly is a first electrical contact assembly, and further comprising a second electrical contact assembly mounted to the end cap and comprising a third spring contact electrically connected to the second feedthrough, wherein the third spring contact is electrically connected to the pole of the battery, and wherein the electronics module is pressed against the third spring contact, whereby the electronics module is electrically connected to the second feedthrough.

22 . The device of claim 21 , wherein the second electrical contact assembly further comprises a fourth spring contact electrically connected to a second pole of the battery and pressed against the electronics module, whereby the electronics module is electrically connected to the second pole of the battery.

23 . T

Assignees

• Medtronic Inc

Inventors

• Ries Andrew J
• Kim Chunho
• Henschel Mark E
• Munoz Robert A
• Kinsey Christopher T
• Voss Jeffrey S

Classifications

• A61N1/39

  Heart defibrillators · CPC title

• A61N1/37518

  Anchoring of the implants, e.g. fixation · CPC title

• A61N1/37512

  Pacemakers · CPC title

• A61N1/372 Primary

  Arrangements in connection with the implantation of stimulators · CPC title

• A61N1/362

  Heart stimulators (heart defibrillators A61N1/39) · CPC title