Browse Prior Art Database

Detachable Insert Molded Earhook

IP.com Disclosure Number: IPCOM000201604D
Original Publication Date: 2010-Nov-16
Included in the Prior Art Database: 2010-Nov-16
Document File: 2 page(s) / 321K

Publishing Venue

Siemens

Related People

Juergen Carstens: CONTACT

Abstract

In current BTE (Behind-The-Ear) hearing instruments, the detachable earhook often comes loose after a few rounds of screwing and tightening to the screw-on connection (SOC). Similar to the self-tapping screw, the assembly hole of the plastic earhook is deformed to create threads when it is screwed onto the SOC. Since deformation of plastic is not consistent, the orientation of the earhook may change upon screwing and tightening. Such earhook cannot offer consistent rigidity and ease of assembly because the assembly method is not standardized. As more plastic material is removed through screwing and unscrewing of the earhook, it cannot be securely fastened to the BTE anymore. Leakage will occur resulting in instability and worsening of the acoustic performance.

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Detachable Insert Molded Earhook

Idea: Phan How Cheng, SG-Singapore; Cheoung Hong Lee, SG-Singapore; Hoong Yih Chan, SG-

Singapore

In current BTE (Behind-The-Ear) hearing instruments, the detachable earhook often comes loose after

a few rounds of screwing and tightening to the screw-on connection (SOC). Similar to the self-tapping

screw, the assembly hole of the plastic earhook is deformed to create threads when it is screwed onto

the SOC. Since deformation of plastic is not consistent, the orientation of the earhook may change

upon screwing and tightening. Such earhook cannot offer consistent rigidity and ease of assembly

because the assembly method is not standardized. As more plastic material is removed through

screwing and unscrewing of the earhook, it cannot be securely fastened to the BTE anymore. Leakage

will occur resulting in instability and worsening of the acoustic performance.

The idea is to create a detachable earhook offering ease of assembly, consistent rigidity and stable

acoustic performance over a long term of usage. In order to achieve this, the surface of the earhook is

designed flat for to provide rotational constraints in the direction of the X-axis (see Figure 1 to 3). A

machine screw thread allows an easy assembly for the screw-on connection. Grooves as retaining

features prevent movements in X-direction.

The novel solution e...