Apparatus and method for dissipating heat from a core module assembly of a retail terminal

• US 5,978,225 A
• Filed: 04/30/1998
• Issued: 11/02/1999
• Est. Priority Date: 04/30/1998
• Status: Expired due to Term

• Current Assignee: NCR Voyix Corporation
• Original Assignee: NCR Corporation (NCR Voyix Corporation)
• Inventors: Kamphuis, Kevin L.
• Primary Examiner(s): Picard, Leo P.
• Assistant Examiner(s): CHERVINSKY, BORIS LEO
• Application Number:
  US09/070,621
• Time in Patent Office: 551 Days
• Field of Search: 361/687, 361/688, 361/690, 361/704, 361/707, 361/709, 361/710, 361/717-722, 257/706, 257/717-719, 257/721, 257/722, 174/16.1-16.3, 165/80.3, 454/184, 29/831, 29/832
• US Class Current: 361/707
• CPC Class Codes: G06F 1/20 Cooling means
• CPC Class Codes: G06F 1/203 for portable computers, e.g. for laptops
• CPC Class Codes: G07G 1/0018 Constructional details, e.g. of drawer, printing means, input means

Abstract

A core module assembly of a retail terminal includes a microprocessor which performs computing functions associated with operation of the retail terminal, whereby heat is generated by the microprocessor during performance of the computing functions. The core module assembly further includes a first heat transfer structure positioned in thermal communication with the microprocessor. The first heat transfer structure has a body portion and a key portion extending from the body portion. The core module assembly also includes a second heat transfer structure having a keying slot defined therein. Relative movement between the first heat transfer structure and the second heat transfer structure is limited when the key portion of the first heat transfer structure is positioned within the keying slot of the second heat transfer structure. The core module assembly includes a fastener for maintaining the key portion of the first heat transfer structure within the keying slot of the second heat transfer structure.

Claims

1. A core module assembly of a retail terminal, comprising:

a microprocessor which performs computing functions associated with operation of said retail terminal, whereby heat is generated by said microprocessor during performance of said computing functions;

a first heat transfer structure positioned in thermal communication with said microprocessor, said first heat transfer structure having (i) a body portion, and (ii) a key portion extending from said body portion;

a housing for containing said microprocessor and said first heat transfer structure therein, said housing including a second heat transfer structure having a keying slot defined therein, wherein (i) relative movement between said first heat transfer structure and said second heat transfer structure is limited when said key portion of said first heat transfer structure is positioned within said keying slot of said second heat transfer structure, and (ii) said second heat transfer structure defines an outer surface of said housing, whereby heat may be transferred from a first location within said housing to a second location outside of said housing via said first heat transfer structure and said second heat transfer structure; and

a fastener for maintaining said key portion of said first heat transfer structure within said keying slot of said second heat transfer structure.

2. The assembly of claim 1, wherein:

said first heat transfer structure has a fastener aperture defined therein, and

rotation of said fastener when said fastener is positioned within said fastener aperture causes said first heat transfer structure to be advanced toward said second heat transfer structure.

4. The assembly of claim 2, further comprising a thermally conductive grease, wherein:

said thermally conductive grease is interposed between said microprocessor and said first heat transfer structure when said key portion of said first heat transfer structure is positioned within said keying slot of said second heat transfer structure.

6. The assembly of claim 1, further comprising a thermally conductive pad, wherein:

said thermally conductive pad is interposed between said first heat transfer structure and said second heat transfer structure when said key portion of said first heat transfer structure is positioned within said keying slot of said second heat transfer structure.

7. The assembly of claim 6, wherein:

said thermally conductive pad is a thermally conductive elastomeric pad, and

rotation of said fastener causes compression of said thermally conductive elastomeric pad.

3. A core module assembly of a retail terminal, comprising:

a microprocessor which performs computing functions associated with operation of said retail terminal, whereby heat is generated by said microprocessor during performance of said computing functions;

a first heat transfer structure positioned in thermal communication with said microprocessor, said first heat transfer structure having (i) a body portion, and (ii) a key portion extending from said body portion;

a second heat transfer structure having a keying slot defined therein, wherein relative movement between said first heat transfer structure and said second heat transfer structure is limited when said key portion of said first heat transfer structure is positioned within said keying slot of said second heat transfer structure; and

a fastener for maintaining said key portion of said first heat transfer structure within said keying slot of said second heat transfer structure,

wherein (i) said first heat transfer structure has a fastener aperture defined therein, and (ii) rotation of said fastener when said fastener is positioned within said fastener aperture causes said first heat transfer structure to be advanced toward said second heat transfer structure, and

wherein (i) said fastener aperture is defined in said key portion of said first heat transfer structure, (ii) said fastener extends through said keying slot of said second heat transfer structure, and (iii) rotation of said fastener when said fastener is positioned within said fastener aperture causes said key portion of said first heat transfer structure to be advanced into said keying slot of said second heat transfer structure.

5. A core module assembly of a retail terminal, comprising:

a microprocessor which performs computing functions associated with operation of said retail terminal, whereby heat is generated by said microprocessor during performance of said computing functions;

a first heat transfer structure positioned in thermal communication with said microprocessor, said first heat transfer structure having (i) a body portion, and (ii) a key portion extending from said body portion;

a second heat transfer structure having a keying slot defined therein, wherein relative movement between said first heat transfer structure and said second heat transfer structure is limited when said key portion of said first heat transfer structure is positioned within said keying slot of said second heat transfer structure; and

a fastener for maintaining said kev portion of said first heat transfer structure within said keying slot of said second heat transfer structure,

wherein (i) said first heat transfer structure has a fastener aperture defined therein, and (ii) rotation of said fastener when said fastener is positioned within said fastener aperture causes said first heat transfer structure to be advanced toward said second heat transfer structure, and

further comprising a thermally conductive grease, wherein said thermally conductive grease is interposed between said microprocessor and said first heat transfer structure when said key portion of said first heat transfer structure is positioned within said keying slot of said second heat transfer structure; and

further comprising a clamp for urging said first heat transfer structure toward said microprocessor, whereby said thermally conductive grease facilitates lateral movement of said first heat transfer structure relative to said microprocessor during rotation of said fastener.

8. A method of securing a first heat transfer structure relative to a second heat transfer structure, wherein (i) the first heat transfer structure has a body portion, and a key portion extending from the body portion, (ii) the second heat transfer structure has a keying slot defined therein, (iii) the second heat transfer structure is part of a housing which contains a microprocessor and the first heat transfer structure, and (iv) the second heat transfer structure defines an outer surface of the housing, comprising the steps of:

positioning the first heat transfer structure in thermal communication with the microprocessor;

advancing the key portion of the first heat transfer structure into the keying slot of the second heat transfer structure; and

transferring heat from a first location within the housing to a second location outside of the housing via the first heat transfer structure and the second heat transfer structure.

9. The method of claim 8, wherein:

a thermally conductive pad is interposed between the first heat transfer structure and the second heat transfer structure, and

the advancing step includes the step of compressing the thermally conductive pad between the first heat transfer structure and the second heat transfer structure.

10. The method of claim 8, wherein:

the first heat transfer structure has a fastener aperture defined therein, and

the advancing step includes the step of rotating a fastener within the fastener aperture so as to cause the first heat transfer structure to be advanced toward the second heat transfer structure.

12. The method of claim 10, wherein:

a thermally conductive grease is interposed between the microprocessor and the first heat transfer structure during the advancing step.

11. A method of securing a first heat transfer structure relative to a second heat transfer structure, wherein (i) the first heat transfer structure has a body portion, and a key portion extending from the body portion, and (ii) the second heat transfer structure has a keying slot defined therein, comprising the steps of:

positioning the first heat transfer structure in thermal communication with a microprocessor; and

advancing the key portion of the first heat transfer structure into the keying slot of the second heat transfer structure,

wherein (i) the first heat transfer structure has a fastener aperture defined therein, and (ii) the advancing step includes the step of rotating a fastener within the fastener aperture so as to cause the first heat transfer structure to be advanced toward the second heat transfer structure, and

wherein (i) the fastener aperture is defined in the key portion of the first heat transfer structure, (ii) the fastener extends through the keying slot of the second heat transfer structure, and (iii) the advancing step further includes the step of rotating the fastener within the fastener aperture so as to cause the key portion of the first heat transfer structure to be advanced into the keying slot of the second heat transfer structure.

13. A method of securing a first heat transfer structure relative to a second heat transfer structure, wherein (i) the first heat transfer structure has a body portion, and a key portion extending from the body portion, and (ii) the second heat transfer structure has a keying slot defined therein, comprising the steps of:

positioning the first heat transfer structure in thermal communication with a microprocessor; and

advancing the key portion of the first heat transfer structure into the keying slot of the second heat transfer structure,

wherein (i) the first heat transfer structure has a fastener aperture defined therein, and (ii) the advancing step includes the step of rotating a fastener within the fastener aperture so as to cause the first heat transfer structure to be advanced toward the second heat transfer structure,

wherein a thermally conductive grease is interposed between the microprocessor and the first heat transfer structure during the advancing step, and

wherein the advancing step further includes the step of urging the first heat transfer structure toward the microprocessor with a clamp, whereby the thermally conductive grease facilitates lateral movement of the first heat transfer structure relative to the microprocessor during the advancing step.

14. A computing device, comprising:

an integrated circuit device which performs computing functions, whereby heat is generated by said integrated circuit device during performance of said computing functions;

a first heat transfer structure positioned in thermal communication with said integrated circuit device, said first heat transfer structure having (i) a body portion, and (ii) a key portion extending from said body portion; and

a housing for containing said microprocessor and said first heat transfer structure therein, said housing including a second heat transfer structure having a keying slot defined therein, wherein (i) relative movement between said first heat transfer structure and said second heat transfer structure is limited when said key portion of said first heat transfer structure is positioned within said keying slot of said second heat transfer structure, and (ii) said second heat transfer structure defines an outer surface of said housing,

whereby heat may be transferred from a first location within said housing to a second location outside of said housing via said first heat transfer structure and said second heat transfer structure.

15. The computing device of claim 14, further comprising:

a fastener for maintaining said key portion of said first heat transfer structure within said keying slot of said second heat transfer structure.

16. The computing device of claim 15, wherein:

said first heat transfer structure has a fastener aperture defined therein, and

rotation of said fastener when said fastener is positioned within said fastener aperture causes said first heat transfer structure to be advanced toward said second heat transfer structure.

18. The computing device of claim 14, further comprising a thermally conductive pad, wherein:

said thermally conductive pad is interposed between said first heat transfer structure and said second heat transfer structure when said key portion of said first heat transfer structure is positioned within said keying slot of said second heat transfer structure.

19. The computing device of claim 14, further comprising a thermally conductive grease, wherein:

said thermally conductive grease is interposed between said microprocessor and said first heat transfer structure when said key portion of said first heat transfer structure is positioned within said keying slot of said second heat transfer structure.

17. A computing device, comprising:

an integrated circuit device which performs computing functions, whereby heat is generated by said integrated circuit device during performance of said computing functions;

a first heat transfer structure positioned in thermal communication with said integrated circuit device, said first heat transfer structure having (i) a body portion, and (ii) a key portion extending from said body portion;

a second heat transfer structure having a keying slot defined therein, wherein relative movement between said first heat transfer structure and said second heat transfer structure is limited when said key portion of said first heat transfer structure is positioned within said keying slot of said second heat transfer structure; and

a fastener for maintaining said key portion of said first heat transfer structure within said keying slot of said second heat transfer structure,

wherein (i) said first heat transfer structure has a fastener aperture defined therein, and (ii) rotation of said fastener when said fastener is positioned within said fastener aperture causes said first heat transfer structure to be advanced toward said second heat transfer structure, and

wherein (i) said fastener aperture is defined in said key portion of said first heat transfer structure, (ii) said fastener extends through said keying slot of said second heat transfer structure, and (iii) rotation of said fastener when said fastener is positioned within said fastener aperture causes said key portion of said first heat transfer structure to be advanced into said keying slot of said second heat transfer structure.