device design with swivel ring

[FraDesign]

Bye to all,

I am designing an electronic device that provides a central fixed body + a silicone rubber ring that allows a control of some functions. to understand, on the model of the volume control unit of the bose companion 5 system, of which I attach a photo.

was a simple volume knob the electronic component would be a simple reostate connected to the knob. the problem of this is instead that the part that turns is only the black ring, but the inner part is fixed, it stands still. and so is my device, which also includes a circular display at the center (which clearly does not have to turn if I turn the ring).

Do you have any idea how such a system is made?? helppppp pleaseee

 

[zeigs]

boh, there can be a thousand ways to realize the object. you can think that they used a ring reostat with the free central part, or the classic potentiometer and an internal/external gear that transmits the bike from the wreath to its tree, a ring with many ears and a photocell (an ad hoc version of the position sensors of the old ball mouse). and I assumed that the knob should rotate completely or almost
Hi.

 

[PaoloColombani]

Bye to all,

I am designing an electronic device that provides a central fixed body + a silicone rubber ring that allows a control of some functions. to understand, on the model of the volume control unit of the bose companion 5 system, of which I attach a photo.

was a simple volume knob the electronic component would be a simple reostate connected to the knob. the problem of this is instead that the part that turns is only the black ring, but the inner part is fixed, it stands still. and so is my device, which also includes a circular display at the center (which clearly does not have to turn if I turn the ring).

Do you have any idea how such a system is made?? helppppp pleaseee

will not be a reostate but a polymer resistor. optical encoders can also be used in less economic digital devices. the rotation of the external ring takes place on a crawling disk while the central part is solid with the base of the device. to be honest I do not see particular problems regarding standard execution with hub (the classic knob to understand).
I can help you, though.

 

[FraDesign]

thanks zeigs and thanks paolo for feedbacks, I also thought of something like...paolo, do you have any links to see how they are made to large lines of polymer resistors or an optical encoder? Thanks.

 

[PaoloColombani]

thanks zeigs and thanks paolo for feedbacks, I also thought of something like... Paolo, do you have any links to see how large lines of polymer resistors or an optical encoder are made? Thanks.

polymer resistors are made as one wants them because they can take any printable form. for the rest I imagine you know how a potentiometer with track and slider is made. the advantage of the use of conductive polymers lies in the linearity of the response and in the maintenance of this characteristic over time at relatively low costs. for optical encoders do not give you any links, it is not for greed, but for the fact that the market is literally invaded; Try to googlare a little and you'll vanish how many manufacturers and suppliers jump out, and also see how they are made. However, the use of these devices is relevant to the type of electronics you intend to use.

a small advice, which is a malizia oramai acquired in the field of product development: usually the existing products are dismantled to see how others have solved some problems ...

 

[FraDesign]

Thank you for the info!
about the advice: Holy words, I practically always do it... except this time for lack of time/materials - hence the request of lumens here on the forum! thanks

polymer resistors are made as one wants them because they can take any printable form. for the rest I imagine you know how a potentiometer with track and slider is made. the advantage of the use of conductive polymers lies in the linearity of the response and in the maintenance of this characteristic over time at relatively low costs. for optical encoders do not give you any links, it is not for greed, but for the fact that the market is literally invaded; Try to googlare a little and you'll vanish how many manufacturers and suppliers jump out, and also see how they are made. However, the use of these devices is relevant to the type of electronics you intend to use.

a small advice, which is a malizia oramai acquired in the field of product development: usually the existing products are dismantled to see how others have solved some problems ...