Securement for transformer core utilized in a transformer power supply module and method to assemble same

• US 6,359,542 B1
• Filed: 08/25/2000
• Issued: 03/19/2002
• Est. Priority Date: 08/25/2000
• Status: Expired due to Fees

• Current Assignee: Motorola, Inc. (Motorola Solutions, Inc.)
• Original Assignee: Motorola, Inc. (Motorola Solutions, Inc.)
• Inventors: Widmayer, Robert B., Turocy, James W.
• Primary Examiner(s): MAI, ANH T
• Application Number:
  US09/648,311
• Time in Patent Office: 571 Days
• Field of Search: 336/92, 336/210.67, 336/212, 336/83
• US Class Current: 336/67
• CPC Class Codes: H01F 17/041 Means for preventing rotation or displacement of the core
• CPC Class Codes: H01F 27/027 specially adapted for combination of signal type inductors or transformers with electronic circuits, e.g. mounting on printed circuit boards
• CPC Class Codes: H01F 27/266 Fastening or mounting the core on casing or support on coil H01F27/30
• CPC Class Codes: H01F 27/2804 Printed windings

Abstract

An apparatus and method for releasable securement together of a transformer power supply assembly together which includes a stacked arrangement (20) of a first transformer core plate (28) positioned to overlie a circuit board (26), a second transformer core plate (24) positioned to underlie the first transformer core plate (28) and the circuit board (26) and a carrier member (22) positioned beneath the second transformer core plate (24), the first and second transformer core plates (28,24) contact one another through at least one opening positioned in the circuit board (26). The apparatus includes having a body positioned over the first transformer core plate (28) in which the body of the span member (32) extends over a surface of the first transformer core plate (28) and extends from a portion of a peripheral edge of the first transformer core plate (28) to another portion of the peripheral edge of the first transformer core plate (28). A cross member (42) connected to the span member extends in a direction transverse to the span member (32) and is interposed between the span member (32) and the first transformer core plate (28). At least two engagement leg members (38) are provided in which one engagement leg member (38) is connected to the span member (32) and extends in a direction transverse to the span member (32) for extending along a side of the stacked arrangement (20) and another engagement leg member (38) is connected to the span member (32) and is spaced apart from the one engagement leg member (38) and extends transverse to the span member (32) for extending along an opposing side of the stacked arrangement (20). At least two hook members (40) for engaging the carrier (22) in which one hook member (40) is connected to the one engagement leg member (38) and extends in a direction transverse to the one engagement leg (38) member and another hook member (40) is connected to the other engagement leg member (38) and extends in a direction transverse toward the other engagement leg member (38).

Claims

1. A releasable securement apparatus for releasably securing a transformer power supply assembly together which includes a stacked arrangement of a first transformer core plate positioned to overlie a circuit board, a second transformer core plate positioned to underlie the first transformer core plate and the circuit board, and a carrier member positioned beneath the second transformer core plate, the first and second transformer core plates contact one another through at least one opening positioned in the circuit board, comprising:

a span member having a body positioned over the first transformer core plate in which the body of the span member extends over a surface of the first transformer core plate and extends from a portion of a peripheral edge of the first transformer core plate to another portion of the peripheral edge of the first transformer core plate;

a cross member connected to the span member in which the cross member extends in a direction transverse to the span member, the cross member is interposed between the span member and the first transformer core plate;

at least two engagement leg members in which one engagement leg member is connected to the span member and extends in a direction transverse to the span member for extending along a side of the stacked arrangement and another engagement leg member is connected to the span member and is spaced apart from the one engagement member and extends transverse to the span member for extending along an opposing side of the stacked arrangement; and

at least two hook members for engaging the carrier in which one hook member is connected to the one engagement leg member and extends in a direction transverse to the one engagement leg member, another hook member is connected to the other engagement leg member and extends in a direction transverse to the other engagement leg member.

2. The releasable securement apparatus of claim 1 in which the body of the span member is elongated.

3. The releasable securement apparatus of claim 1 in which the portion of the peripheral edge of the first transformer core plate is positioned on one side of the first transformer core plate and the other portion of the peripheral edge of the first transformer core plate is positioned on an opposite side of the first transformer core plate.

4. The releasable securement apparatus of claim 1 in which the body of the span member generally overlies at least one axis of symmetry of the first transformer core plate.

5. The releasable securement apparatus of claim 4 in which the second transformer core plate has another peripheral edge which defines substantially the same dimensions and shape as the peripheral edge of the first transformer core plate.

6. The releasable securement apparatus of claim 4 in which the second transformer core plate has an at least one of another axis of symmetry which underlies and is generally in alignment with the at least one axis of symmetry of the first transformer core plate and the body of the span member.

7. The releasable securement apparatus of claim 1 in which the span member is constructed of a flexible material.

8. The releasable securement apparatus of claim 7 in which one of the two engagement leg members extends in a direction along a line and the other of the two engagement leg members extends in another direction along another line, in which the directions of the one and the other lines are oriented to converge.

9. The releasable securement apparatus of claim 8 in which respective ends of the one and the other hook members are positioned at a distance apart from one another less than the distance between a side of the stacked arrangement.

10. The releasable securement apparatus of claim 9 in which the body of the span member has an end and an opposing end upon which a force is applied to both the end and an opposing end of the span member enabling the span member to flex and increase a distance between the spaced apart one and another engagement leg members and enabling the one and other hook members to separate to a distance to exceed the distance between one side of the stacked arrangement and an opposing side of the stacked arrangement enabling the one and other hook members to have clearance along the side and the opposing side of the stacked arrangement.

11. The releasable securement apparatus of claim 7 including an extension member positioned at the one end of the span member and another extension member positioned on an opposing end of the body of the span member enabling prehensile application of force at the one end and opposing end of the span member for flexing the span member.

12. The releasable securement apparatus of claim 11 including a finger pad secured to the span member between the one and opposing ends of the span member for receiving a fingertip for applying a force to the span member.

13. The releasable securement apparatus of claim 1 in which the cross member is constructed of a flexible material.

14. The releasable securement apparatus of claim 1 in which the cross member includes an elongated body.

15. The releasable securement apparatus of claim 1 in which the cross member extends generally within a plane containing the body of the span member.

16. The releasable securement apparatus of claim 13 in which the cross member has one end positioned spaced apart from the body of the span member and another end spaced apart from the span member in which an one foot member is secured to one end of the cross member and another foot member is secured to the other end of the cross member in which the one foot member and the other foot member each extend in a direction transverse to the cross member for engaging the surface of the first transformer core positioning the span member spaced apart from the surface of the first transformer core plate.

17. The releasable securement apparatus of claim 13 include s at least two cross members spaced apart from each other along the span member and extending generally in the same direction.

18. The releasable securement apparatus of claim 16 in which at least one of the two engagement leg members with the respective hook member secured thereto extends short of the carrier of the stacked arrangement with each of the one and other foot members engaged with the surface of the first transformer core plate and the cross member unflexed relative to the span member.

19. The releasable securement apparatus of claim 18 in which the one and other foot members are biased against the surface of the first transformer plate pushing the first transformer core plate against the second transformer core plate with the at least two hook members engaged to the carrier of the stacked arrangement and the cross member flexed relative to the span member.

20. The releasable securement apparatus of claim 19 in which the distance between the respective ends of the two hook members engaged to the carrier of the stacked arrangement is greater than the distance between the hook members without the span member in an unflexed position biasing the two engagement leg members and hook members toward the stacked arrangement.

21. The releasable securement apparatus of claim 1 in which the span member and the cross member are integrally formed.

22. The releasable securement apparatus of claim 1 in which the at least two engagement leg members are integrally formed with the span member.

23. The releasable securement apparatus of claim 1 in which one of the at least two hook members is integrally formed with one of the at least two engagement leg members and another of the at least two hook members is integrally formed with another of the at least two engagement leg members.

24. A method for releasably securing a transformer power supply assembly together which includes a stacked arrangement of a first transformer core plate positioned to overlie a circuit board, a second transformer core plate positioned to underlie the first transformer core plate and the circuit board, and a carrier member positioned beneath the second transformer core plate, the first and second transformer core plates contact one another through at least one opening positioned in the circuit board, including the steps of:

aligning a releasable securement apparatus with the stacked arrangement including positioning a span member of the apparatus to overlie the first transformer core plate and positioning each of at least two engagement leg members connected to opposing sides of the span member and which are in converging alignment with one another and in which a hook member is secured to each of the leg members in which the distance between the hook members is shorter than the distance between opposing sides of the stacked arrangement;

applying a force to the span member flexing the span member and increasing the distance between the hook members providing clearance of the hook members along the opposing sides of the stacked arrangement;

moving the engagement leg members along opposing sides of the stacked arrangement with at least one foot member secured to at least one cross member which is secured transverse to the span member and in which the at least one foot member is interposed between the span member and the surface of the top core plate member until the at least one foot member is positioned resting on the top core plate and the hook members are positioned short of an engagement position of the carrier; and

applying another force to the span member flexing the cross member relative to the span member moving the leg engagement members further along the opposing sides of the stacked arrangement until the hook members reach the engagement position of the carrier; and

releasing the application of the other force to the span member with the hook members engaging the engagement position of the carrier member maintaining the cross member in a flexed position biasing the at least one foot member against the top core plate and the second core plate with at least one of the leg engagement members biased against at least one of the opposing sides of the stacked arrangement.

25. The method of claim 24 in which the step of applying the force to the span member includes grasping opposing ends of the span member and applying a force to each end moving the opposing ends closer together.

26. The method of claim 25 in which the step of applying the force includes positioning a finger on a mid-portion of the span member to apply a force in an opposite direction than the force applied to the opposing ends of the span member.

27. The method of claim 24 in which the step of applying another force to the span member includes pushing the span member towards the first transformer core plate.

28. The method of claim 24 in which the reapplication of the force to the span member moves the leg engagement members further apart and increases the distance between the hook members allowing the hook members to disengage from the engagement position of the carrier.