Button latch with integrally molded cantilever springs

Patent metadata

Field	Value
Publication number	US-9464741-B2
Application number	US-97694310-A
Country	US
Kind code	B2
Filing date	Dec 22, 2010
Priority date	Dec 9, 2009
Publication date	Oct 11, 2016
Grant date	Oct 11, 2016

Abstract

An integral button latch is formed for use in a female fluid connector housing. The button latch has a latch plate, a button actuator, and two or more cantilevered leg springs extending from beneath the actuation surface to interface with the connector housing. The latch plate, the button actuator, and the leg springs are all integrally formed. The leg springs bias the latch plate in a locked position and resist depression forces applied to either of the button actuator or the latch plate. By integrally forming the button latch structure, the separate costs associated with purchasing the springs, molding the lock latch, and the ensuing assembly of the three are significantly diminished.

First claim

What is claimed is:

1. A button latch for use in a fluid connector, the button latch comprising:
a button actuator portion for engagement by a user;
a latch plate integrally formed with and extending downwardly and perpendicularly from a proximal edge of the button actuator portion and configured to physically secure a male connector within the button latch; and
a plurality of cantilevered leg springs, each leg spring integrally formed with the button actuator portion and the latch plate and cantilevered from either a bottom surface of the button actuator portion or both an upper portion of the latch plate and the bottom surface of the button actuator portion,
wherein the plurality of cantilevered leg springs comprise:
two leg springs extending symmetrically downward and inward from laterally opposite corners of the button actuator portion to bias the latch plate in a locked position and resist depression forces applied to each of the button actuator portion and the latch plate, and
a rear leg spring extending downward from a bottom of the button actuator portion and curving distally.

2. The button latch of claim 1 , wherein the two leg springs curve symmetrically downward and inward to extend under the latch plate.

3. The button latch of claim 2 , wherein the two leg springs each have an outer shoulder and an inner hollow and a ratio of a radius of curvature of the outer shoulder to a radius of curvature of the inner hollow is between 5.40 and 9.67.

4. The button latch of claim 2 , wherein a ratio of an outer radius of curvature of one of the leg springs to an inner radius of curvature of the one of the leg springs is between 1.06 and 1.22.

5. The button latch of claim 1 , wherein the plurality of leg springs further comprise two leg springs extending downward and angled rearward from laterally opposite sides of the button actuator portion away from the latch plate.

6. The button latch of claim 1 , wherein the two leg springs extend downward in substantially a same plane as the latch plate.

7. The button latch of claim 1 , wherein the plurality of leg springs further comprise two leg springs extending downward from laterally opposite sides of the button actuator portion and further curving forward to extend along a length of the button actuator portion toward the latch plate.

8. The button latch of claim 1 , further comprising a hinge tab extending from a rear edge of the button actuator portion, the hinge tab being configured to engage a bearing surface on a housing of the fluid connector.

9. The button latch of claim 1 , further comprising an alignment post extending downward from a bottom surface of the button actuator portion, the alignment post being configured to engage with a post receiver in the fluid connector.

10. The button latch of claim 9 , wherein the alignment post is positioned along a rear edge of the button actuator portion.

11. The button latch of claim 1 , further comprising a retention tab positioned along a front edge of the button actuator portion and configured to retain the front edge of the button actuator portion within a housing of the fluid connector.

12. A fluid tubing connector, comprising:
a housing defining an aperture in a top surface thereof;
a tube connection portion;
an opening configured to receive a male connector; and
a button latch configured to engage and disengage with the male connector, the button latch further comprising:
a button actuator portion with a top surface exposed within the aperture in the top surface of the housing for engagement by a user;
a latch plate integrally formed with and extending downwardly and perpendicularly from a proximal edge of the button actuator portion and defining a latch aperture substantially aligned with the opening, wherein the latch plate is configured to engage a male connector to secure the fluid tubing connector in a locked position; and
a plurality of cantilevered leg springs, each leg spring integrally formed with the button actuator portion and the latch plate, extending from either a bottom surface of the button actuator portion or both an upper portion of the latch plate and the bottom surface of the button actuator portion, and contacting an inner wall surface of the housing,
wherein the plurality of cantilevered leg springs comprise:
two leg springs extending symmetrically downward and inward from laterally opposite corners of the button actuator portion to bias the latch plate within the housing in the locked position and resist depression forces applied to each of the button actuator portion and the latch plate, and
a rear leg spring extending downward from a bottom of the button actuator portion and curving distally to slidingly engage the inner wall surface of the housing.

13. The fluid tubing connector of claim 12 , wherein a ratio of an outer radius of curvature of the rear leg spring to a radius of curvature of the inner wall surface of the housing is between 6.44 and 8.30.

14. The fluid tubing connector of claim 12 , wherein the plurality of leg springs further comprise two leg springs extending downward and angled rearward from laterally opposite sides of the button actuator portion away from the latch plate to slidingly engage the inner wall surface of the housing.

15. The fluid tubing connector of claim 12 , wherein the two leg springs extend downward in substantially a same plane as the latch plate.

16. The fluid tubing connector of claim 12 , wherein the plurality of leg springs further comprise two leg springs extending downward from laterally opposite sides of the button actuator portion and further curving forward to extend along a length of the button actuator portion toward the latch plate.

17. The fluid tubing connector of claim 12 , further comprising a hinge tab extending from a rear edge of the button actuator portion, the hinge tab being configured to engage a bearing surface on an edge of the housing defining the aperture in the top surface.

18. The fluid tubing connector of claim 17 , wherein:
the housing further defines a channel within which the latch plate translates upward and downward; and
an interface between the button actuator portion and the latch plate is pliable to allow the button actuator portion to bend with respect to the latch plate as the button actuator portion pivots on the hinge tab at the bearing surface when depressed.

19. The fluid tubing connector of claim 12 , further comprising an alignment post extending downward from the bottom surface of the button actuator portion, the alignment post being configured to engage with a post receiver formed on the inner wall surface of the housing.

20. The fluid tubing connector of claim 19 , wherein the alignment post is positioned along a rear edge of the button actuator portion.

21. The fluid tubing connector of claim 12 , further comprising a retention tab positioned along a front edge of the button actuator portion and configured engage an edge of the housing defining the aperture in the top surface to retain the front edge of the button actuator portion within the housing.

22. The fluid tubing connector of claim 12 , further comprising one or more channels formed in the inner wall surface of the housing, the one or more channels being configured to interface with and guide movement of one or more respective ones of the plurality of cantilevered leg springs when the button actuator portion is depressed.

23. The fluid tubing connector of claim 12 , wherein the

Assignees

• Lewis Peter D
• Whitaker Carl T
• Phipps Riley M
• Nordson Corp

Inventors

• Lewis Peter D
• Whitaker Carl T
• Phipps Riley M

Classifications

• A61B5/022

  by applying pressure to close blood vessels, e.g. against the skin; Ophthalmodynamometers · CPC title

• A61M39/1011

  Locking means for securing connection; Additional tamper safeties (A61M39/16 takes precedence) · CPC title

• A61M2039/1088

  having a plurality of male connectors, e.g. Luer connectors · CPC title

• A61M2039/1027

  Quick-acting type connectors · CPC title

• A61M39/105

  Multi-channel connectors or couplings, e.g. for connecting multi-lumen tubes (multi-channel connectors in general F16L37/56) · CPC title