Watertight welding methods and components

• US 9,849,538 B2
• Filed: 12/24/2014
• Issued: 12/26/2017
• Est. Priority Date: 12/24/2014
• Status: Active Grant

• Current Assignee: Logitech Europe S A (Logitech International SA)
• Original Assignee: Logitech Europe S A (Logitech International SA)
• Inventors: Armstrong, Judd, Duddy, Stephen
• Primary Examiner(s): Sells, James
• Application Number:
  US14/583,084
• Publication Number:
  US 20160184933A1
• Time in Patent Office: 1,098 Days
• Field of Search: 156 731
• CPC Class Codes: B23K 1/0008 specially adapted for particular articles or work
• CPC Class Codes: B23K 11/00 Resistance welding; Severing by resistance heating
• CPC Class Codes: B23K 11/08 Seam welding not restricted to one of the preceding subgroups
• CPC Class Codes: B23K 20/10 making use of vibrations, e.g. ultrasonic welding
• CPC Class Codes: B23K 2103/02 Iron or ferrous alloys
• CPC Class Codes: B23K 2103/08 Non-ferrous metals or alloys
• CPC Class Codes: B23K 2103/42 Plastics B23K2103/16 takes precedence
• CPC Class Codes: B23K 2103/54 Glass
• CPC Class Codes: B23K 26/206 Laser sealing
• CPC Class Codes: B23K 33/004 Filling of continuous seams
• CPC Class Codes: B29C 65/02 by heating, with or without pressure
• CPC Class Codes: B29C 65/08 using ultrasonic vibrations non-plastics element to plastics elements B29C65/645
• CPC Class Codes: B29C 65/16 Laser beams
• CPC Class Codes: B29C 65/7805 the parts to be joined comprising positioning features
• CPC Class Codes: B29C 66/1224 comprising at least a butt joint-segment
• CPC Class Codes: B29C 66/1226 comprising at least one bevelled joint-segment
• CPC Class Codes: B29C 66/12445 having the tongue on the side
• CPC Class Codes: B29C 66/12463 being tapered
• CPC Class Codes: B29C 66/12469 being asymmetric
• CPC Class Codes: B29C 66/21 said joint lines being formed by a single dot or dash or by several dots or dashes, i.e. spot joining or spot welding
• CPC Class Codes: B29C 66/30221 : said melt initiators being point-like
• CPC Class Codes: B29C 66/30223 : said melt initiators being rib-like
• CPC Class Codes: B29C 66/54 : Joining several hollow-preforms, e.g. half-shells, to form hollow articles, e.g. for making balls, containers; Joining several hollow-preforms, e.g. half-cylinders, to form tubular articles
• CPC Class Codes: B29C 66/7392 : characterised by the material of at least one of the parts being a thermoplastic
• CPC Class Codes: B29C 66/7394 : characterised by the material of at least one of the parts being a thermoset
• CPC Class Codes: B29C 66/8322 : Joining or pressing tools reciprocating along one axis
• CPC Class Codes: B29L 2031/3475 : Displays, monitors, TV-sets, computer screens
• CPC Class Codes: B29L 2031/3481 : Housings or casings incorporating or embedding electric or electronic elements

Abstract

A method for watertight welding, and components formed using that welding method, wherein the welding method includes providing a first component half with a groove and a protruding ridge located therein, providing a second component half with a tenon shaped to match the profile of the groove, disposing the tenon inside the groove such that the tenon contacts the protruding ridge, applying an ultrasonic power source near the groove to melt the protruding ridge, and applying opposing vertical force to the first component half relative to the second component half, such that the protruding ridge wedges in a bonding seam between an outside surface of the tenon and an inside surface of the groove.

Claims

1. A method of forming a watertight enclosure for electronic components, comprising:

providing a first component portion comprising a first groove and a protruding ridge located therein, the first groove including a floor, an inside ridge, and an outside ridge, the inside ridge and the outside each extending from the floor and separated from each other in a first direction, wherein

the protruding ridge comprises a bonding material,

the first groove comprises a second groove inside the first groove, and

the second groove and the protruding ridge comprising the bonding material are spaced apart in the first direction;

providing a second component portion comprising a tenon, the tenon shaped to follow a profile of the first groove;

disposing the tenon inside the first groove, such that the tenon contacts the protruding ridge;

applying energy from a power source near the first groove to cause the protruding ridge to melt; and

applying a force to the first component portion relative to the second component portion, such that

a portion of the protruding ridge is disposed in a bonding seam formed between an outside surface of the tenon and an inside surface of the first groove,

the first component portion and the second component portion are brought together to form the enclosure that is configured to allow one or more electronic components to be disposed therein,

a space defined by the second groove is positioned so that the tenon is not disposed within the defined space when the first component portion and the second component portion are brought together to form the enclosure, and

at least a portion of excess bonding material flows inside the second groove when the first component portion and the second component portion are brought together to form the enclosure.

2. The method of claim 1, further comprising aligning the first component portion with the second component portion by bringing an outside lateral edge of the tenon in contact with an inside lateral edge of the first groove.

3. The method of claim 2, further comprising maintaining contact between the outside lateral edge of the tenon and the inside lateral edge of the first groove while sliding the first component portion towards the second component portion.

4. The method of claim 3, wherein the inside ridge protrudes further than the outside ridge relative to the floor of the first groove.

5. The method of claim 1, wherein the applying energy from the power source further comprises providing energy from a source used in a high temperature laser welding, soldering, or resistive welding process.

6. The method of claim 1, wherein the bonding material is metal, glass, thermoplastic, or thermoset.

7. The method of claim 1, further comprising liquefying the bonding material, such that the bonding material flows into the bonding seam.

8. The method of claim 7, further comprising cooling the bonding material, such that the bonding material re-solidifies.

10. The method of claim 1, wherein the applying the power source near the first groove further comprises bonding the first groove to the tenon using ultrasonic welding.

11. The method of claim 1, wherein the bonding material comprises a thermoplastic or thermoset material.

12. The method of claim 1, wherein the protruding ridge contacts the inside ridge of the first groove and the second groove is partially formed by the outside ridge of the first groove.

13. The method of claim 1, wherein

the floor of the first groove has a first end and a second end,

the second groove is located at the first end of the floor, and

the protruding ridge is located at the second end of the floor.

9. A method for bonding a first component portion to a second component portion to form an enclosure for electronic components comprising:

providing one or more electronic components;

forming a first groove located on a first outer edge of the first component portion, the first groove including a floor, an inside ridge, and an outside ridge, the inside ridge and the outside each extending from the floor and separated from each other in a first direction;

forming a protruding ridge located in the first groove, the protruding ridge comprising a bonding material, wherein the first groove comprises a second groove inside the first groove and wherein the second groove and the protruding ridge comprising the bonding material are spaced apart in the first direction;

forming a tenon located on a first outer edge of the second component portion, the tenon shaped to follow a profile of the first groove;

aligning the first outer edge of the first component portion to the first outer edge of the second component portion, the aligning comprising bringing a first outside lateral edge of the tenon in contact with a first inside lateral edge of the first groove such that the tenon slides inside the first groove and contacts the protruding ridge;

maintaining contact between the first outside lateral edge of the tenon and the first inside lateral edge of the first groove while sliding the first component portion towards the second component portion;

deforming the protruding ridge by compressing the protruding ridge against the tenon as the first component portion and the second component portion are brought together to form the enclosure for the one or more electronic components, wherein

a space defined by the second groove is positioned so that the tenon is not disposed within the defined space when the first component portion and the second component portion are brought together to form the enclosure, and

excess bonding material flows inside the second groove when the first component portion and the second component portion are brought together to form the enclosure;

applying energy from a power source to each of the tenon, the protruding ridge, and the first groove, such that the bonding material begins to transition to a liquid state and flow into a seam formed between the tenon and the first groove; and

cooling the bonding material, such that the bonding material transitions back to a solid state sealing the first component portion to the second component portion that forms the enclosure with the one or more electronic components disposed therein.