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Criterion of a good fingertip mouse -- ideas?

post #1 of 6
Thread Starter 
Digging through my PM inbox I found this message I made a while back:
Quote:
Hi, really appreciate your reply!

I have yet to purchase either of the DM1 or 2, as I am an extreme fingertip user and have personally tried the Sensei shape before, which has a slightly wider butt than I would have liked.

However, I am already hooked to your brand seeing that you guys are not shy from recreating great shapes that the community love! I am definitely eyeing your product lines very, very closely biggrin.gif

The shape which extreme fingertip users like us look for must fit these criteria in the following order (which very few mice on the market currently manages):

1. a slim butt in which total flexion of the fingers would not cause the rear of the mouse to come in contact (only Logitech Mini Optical and Zowie MiCo satisfies this, G100s require holding it slightly rearward to achieve this, which really disrupts the balance for FPS)

2. a sharply vertical and smoothly contoured side profile that extends all the way to the butt, or alternatively if the butt is to be vertically rounded, the vertex line must align with the center of the side strip. The former requirement is so that pushing the mouse around with fingertips will have exactly horizontal force components, while the latter is so that total extension of the fingers allows an additional range limit by letting the mouse roll on the thumb.

Pretty much every single mice on the market has a downward slope at the butt, which means that pushing the extension limit tends to nudge the palm upward. One example of this is the Zowie ZA13 whose dimension almost makes it a perfect fingertip mouse but failed in this respect.

3. A short front-to-back length so that its angular moment of inertia is reduced, i.e. when lifting the mouse with only two pivot points of the fingertip it would not tilt forward or backward so readily. The G100s suffers from this slightly.

The following ergonomic points are also quite important in order, but not as urgently critical as the previous three:

4. the button profile should be as horizontal as the design allows. This is so that depressing the button would not cause the mouse to shift rearwards due to the slanted force components. The G100s is one example that comes close to perfection but flawed in this respect.

5. A short side-vertex-to-scrollwheel distance. Because us fingertip users will pretty much always hold the mouse at around the side vertex, most mice have the scrollwheel located too far from the side vertex, requiring extreme and unnatural extension of the finger to firmly middle click without scrolling. Prime examples include G100s and G303. Interesting to note for the G303 is that the scrollwheel-to-rear distance is actually designed to be smaller than typical, which is one good way of reducing the effective front-to-back mouse length, but then they completely negates this good design decision by making the side vertex way too far back.

6. the contact height of the buttons with respect to the fingertips should not be too high. Us fingertip-users hold the mouse such that it mimics the shape of the hand when resting all five fingers on the table (as opposed to palmers who rest with their hand tilted outward such that the thumb does not contact the flat surface at all).
Try it -- rest your palm and all 5 fingers on the flat surface with natural curl. Now, the stress on the fingers from button height of the mouse is represented by lifting your index and middle finger. The buttons are too high when the base joints are close to flat with the back of your hand

7. the sensor y-position should align with the side-vertex axis

Thank you once again for being so appreciative, please do not hesitate to ask if I were not clear on any of the points. I could provide diagrams and photographs to aid the explanation if you wish.

Regards,

I can't recall immediately off the top of my head a few other key points that I thought of afterwards that were also quite important, though I would first like to hear from the like-minded folks here what other ideas I might have missed.
post #2 of 6
I personally hate indents on the buttons.
post #3 of 6
I'm not 100% sure what you mean by some of these, but I'll add a few:

1. The buttons need to be long, or else you can't hold the mouse far enough back. You need to be able to hold the mouse far back so that a) you get more vertical range of motion, b) your thumb can push the mouse forward, and c) you don't have the back end of the mouse hanging out way far away from where you have any control. This is a big part of why the Ninox Aurora shape fails for me, and why I don't get along with the WMO; I can't hold either of them far enough back and still press the buttons.

2. The overall size has to be small, or you lose too much range of motion. As a general rule of thumb, if palm grip users aren't raging, you haven't made the mouse small enough yet. In particular, the front-to-back length of the mouse must be short, so that you get enough Y range.

3. No gradual downward slope at the back. The part of the mouse that extends behind where your thumb rests is counterproductive; it adds awkwardly-located mass and friction without increasing control at all. Instead of trying to come up with a shape that allows the back of the mouse to be tucked under the palm during downwards motion, just eliminate that part of the mouse altogether.

4. The sensor has to lie at the midpoint of where your fingers contact the mouse. This should also be the position of the mouse's center of mass, and the center of its friction. This configuration maximizes the physical control that the user has over the mouse.

5. Sides need a )_( shape, not \_/ or /_\. With fingertip grip, there's no downward pressure to speak of on the mouse, so \_/ tilts or even lifts the mouse during fast motions; yet, at the same time, the limited range of motion means that lifting off is often necessary, so /_\ is not acceptable either.

6. The sides need to be tall enough that you can grip the mouse by them.
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post #4 of 6
would not having a wheel be a dealbreaker?
what if it's 28g? biggrin.gif
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main
(15 items)
 
old
(14 items)
 
 
CPUMotherboardGraphicsRAM
4770k maximus vii impact nvidia gtx 970 crucial ballistix tactical 16gb 
Hard DriveCoolingOSMonitor
crucial mx100 noctua nh-c14 windows 7 ultimate sony cpd-g520 
KeyboardPowerCaseMouse
kbp v80 matias quiet silverstone sx500-lg ncase m1 v3 logitech g100s with mcu replaced by teensy2.0 
Mouse PadAudioAudio
allsop raindrop xl chord mojo hifiman re-600 
CPUMotherboardGraphicsRAM
i7 920 evga x58 sli le galaxy gtx 460 crucial something 3x1gb 
Hard DriveCoolingOSMonitor
intel 330 180gb scythe kotetsu windows 8.1 pro sony cpd-g520 
KeyboardPowerCaseMouse
logitech k120 silverstone st75f-gs nxzt h440 evga torq x5 
Mouse PadAudio
allsop raindrop mobo 
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post #5 of 6
I also vote for Kana/Kinzu shape, ) ( along the mouse body helps in vertical movement alot.
post #6 of 6
along the mouse body helps in vertical movement alot.7.gif
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