Force switch

• US 9,666,389 B2
• Filed: 09/24/2014
• Issued: 05/30/2017
• Est. Priority Date: 05/19/2006
• Status: Active Grant

• Current Assignee: Ethicon Endo-Surgery, Inc. (Johnson & Johnson)
• Original Assignee: Ethicon Endo-Surgery, Inc. (Johnson & Johnson)
• Inventors: Smith, Kevin W.
• Primary Examiner(s): LEE, KYUNG S
• Application Number:
  US14/495,232
• Publication Number:
  US 20150027864A1
• Time in Patent Office: 979 Days
• Field of Search: 200 6153, 200 6167, 200 6176, 200 16 B, 200532
• CPC Class Codes: A61B 17/00 Surgical instruments, devices or methods, e.g. tourniquets A61B18/00 takes precedence; contraceptive devices, pessaries, or applicators therefor A61F6/00; eye surgery A61F9/007; ear surgery A61F11/00
• CPC Class Codes: A61B 17/068 Surgical staplers , e.g. containing multiple staples or clampsstaplers containing only one staple A61B17/10; magazines or containers for staples A61B17/105; for performing anastomosis A61B17/115; staplers in general B25C5/00
• CPC Class Codes: A61B 17/115 Staplers for performing anastomosis in a single operation
• CPC Class Codes: A61B 17/72 Intramedullary pins, nails or other devices A61B17/744 takes precedence
• CPC Class Codes: A61B 2017/00017 Electrical control of surgical instruments
• CPC Class Codes: A61B 2017/00115 with audible or visual output with imaging means A61B90/37, A61B34/20
• CPC Class Codes: A61B 2017/00398 using powered actuators, e.g. stepper motors, solenoids
• CPC Class Codes: A61B 2090/032 pressure limiting, e.g. hydrostatic
• CPC Class Codes: A61B 2090/064 for measuring force, pressure or mechanical tension
• CPC Class Codes: A61B 2090/0811 for the position of a particular part of an instrument with respect to the rest of the instrument, e.g. position of the anvil of a stapling instrument
• CPC Class Codes: H01H 11/00 Apparatus or processes specially adapted for the manufacture of electric switches processes specially adapted for manufacture of rectilinearly movable switches having a plurality of operating members associated with different sets of contacts, e.g. keyboards, H01H13/88
• CPC Class Codes: H01H 13/14 Operating parts, e.g. push-button
• CPC Class Codes: H01H 13/18 adapted for actuation at a limit or other predetermined position in the path of a body, the relative movement of switch and body being primarily for a purpose other than the actuation of the switch, e.g. door switch, limit switch, floor-levelling switch of a lift
• CPC Class Codes: H01H 2203/00 Form of contacts
• CPC Class Codes: H01H 2235/01 Spiral spring
• CPC Class Codes: H01H 2300/014 Application surgical instrument
• CPC Class Codes: H01H 35/14 Switches operated by change of acceleration, e.g. by shock or vibration, inertia switch wherein the liquid constitutes a contact of the switch H01H29/002
• CPC Class Codes: H01H 9/06 Casing of switch constituted by a handle serving a purpose other than the actuation of the switch, e.g. by the handle of a vacuum cleaner
• CPC Class Codes: Y10T 29/49105 Switch making

Abstract

A switch comprising a switching element, a hollow body defining an interior cavity in which the switching element is movably disposed along a longitudinal device axis to define a first and second positions along the longitudinal device axis, the second position being different from the first position, a biasing element imparting an adjustable biasing force to the switching element to place the switching element in one of the first position and the second position until an external force imparted to the switching element along the longitudinal device axis exceeds the biasing force thereby causing the switching element to move to the other one of the first position and the second position, and an electrically-conductive contact coupled to the switching element and defining a first switching state when the switching element is in the first position and a second switching state when the switching element is in the second position.

Claims

1. A switch of a device having a longitudinal device axis, the switch comprising:

a switching element;

a hollow body defining an interior cavity in which the switching element is movably disposed along the longitudinal device axis to define;

a first position along the longitudinal device axis; and

a second position along the longitudinal axis, the second position being different from the first position;

a biasing element imparting an adjustable biasing force to the switching element to place the switching element in one of the first position and the second position until an external force imparted to the switching element along the longitudinal device axis exceeds the biasing force thereby causing the switching element to move to the other one of the first position and the second position; and

an electrically-conductive contact coupled to the switching element and defining;

a first switching state when the switching element is in the first position; and

a second switching state when the switching element is in the second position.

2. The switch according to claim 1, wherein:

the switching element has a longitudinal switching axis disposed parallel to the longitudinal device axis;

the switching element is movably disposed within the interior cavity of the hollow body and along the switching axis; and

the biasing element imparts a variable longitudinal biasing force to the switching element.

3. The switch according to claim 2, wherein the switching axis is disposed coincident with the device axis.

4. The switch according to claim 1, wherein:

the first position is a switch-making position;

the second position is a switch-breaking position;

the first switching state is a switch-making state; and

the second switching state is a switch-breaking state.

5. The switch according to claim 4, wherein the biasing element imparts the biasing force to place the switching element in the switch-breaking position to create a normally open switch configuration.

6. The switch according to claim 4, wherein the biasing element imparts the biasing force to place the switching element in the switch-making position to create a normally closed switch configuration.

7. The switch according to claim 4, wherein a distance between the switch-making position and the switch-breaking position is between approximately 25 μ

m and approximately 750 μ

m.

8. The switch according to claim 4, wherein a distance between the switch-making position and the switch-breaking position is between approximately 75 μ

m and approximately 200 μ

m.

9. The switch according to claim 1, wherein the switching element is a piston.

10. The switch according to claim 1, wherein the electrically-conductive contact is physically coupled to the switching element and is movable along the longitudinal device axis between the first position and the second position.

11. The switch according to claim 1, further comprising a stop element defining a second interior cavity in which the switching element is movably disposed, the stop element being at least partly disposed in the interior cavity of the hollow body.

12. The switch according to claim 11, wherein:

the switching element further comprises a bias contact; and

the biasing element is disposed about at least a portion of the switching element between the stop element and the bias contact.

13. The switch according to claim 12, wherein a magnitude of the biasing force is dependent upon a longitudinal position of the stop element within the interior cavity of the hollow body.

14. The switch according to claim 12, wherein the biasing element is a compression spring compressed between the bias contact and the stop element around the switching element to bias the switching element in a direction away from the stop element.

15. The switch according to claim 1, wherein the electrically-conductive contact is electrically insulated from the hollow body and the switching element.

16. The switch according to claim 1, further comprising an electric indication circuit:

electrically connected to the switching element and the electrically-conductive contact; and

having an indicator operable to transmit state-change information to signal a user that a state change of the switching element has occurred.

17. A switch, comprising:

a hollow body defining an interior cavity;

a switching element having a switching axis and movably disposed within the interior cavity of the hollow body along the switching axis to define;

a first position along the switching axis; and

a second position along the switching axis, the second position being different from the first position;

a biasing element imparting an adjustable biasing force to the switching element to place the switching element in one of the first position and the second position until an external force imparted to the switching element along the switching axis exceeds the biasing force thereby causing the switching element to move to the other one of the first position and the second position; and

an electrically-conductive contact coupled to the switching element and defining;

a first switching state when the switching element is in the first position; and

a second switching state when the switching element is in the second position.

18. A switch of a device, comprising:

a hollow body defining an interior cavity;

a switching element having a longitudinal switching axis and movably disposed within the interior cavity of the hollow body along the switching axis to define;

a first position along the switching axis; and

a second position along the switching axis, the second position being different from the first position;

a biasing element imparting an adjustable longitudinal biasing force to the switching element to place the switching element in one of the first position and the second position until an external force imparted to the switching element along the switching axis exceeds the biasing force thereby causing the switching element to move to the other one of the first position and the second position; and

an electrically-conductive contact coupled to the switching element and defining;

a first switching state when the switching element is in the first position; and

a second switching state when the switching element is in the second position.

19. The switch according to claim 18, wherein the longitudinal switching axis is disposed parallel to a longitudinal device axis of the device.