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Folds here Folds here

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Ergonomic Design of Treatment Tools for Physical

Therapists

Jungho Daniel Choi

10th Grade

Student

References

Introduction

Design Prototype

(n.d.). Retrieved February 28, 2018, from http://www.massageenvy.com/massage/massage-types/deep-tissue-massage Cicetti, F. (2011, August 16). Do Massages Do Anything Besides Relax You? Retrieved February 28, 2018, from http://www.livescience.com/35821-massages-relaxation-health-benefits.html Infrared Light Therapy. (n.d.). Retrieved February 28, 2018, from http://www.drwhitaker.com/infrared-light-therapy Massage Therapy for Health Purposes. (2017, March 23). Retrieved February 28, 2018, from https://nccih.nih.gov/health/massage/massageintroduction.htm What to Expect From Massage Therapy. (n.d.). Retrieved February 28, 2018, from http://www.catalystsportstherapy.com/expect.html

Results

Future Modifications

Conclusion

Materials & Methods • Clay • Liquid Plastic • Plaster of Paris • Body Filler • Spray Paint • Strong plastic • Massage Wheels • Batteries & Battery Clip • Vibration Motor • Infrared LED • Wires

The electrical phase will include the implementation of electronics into the ergonomic mouse. A motor will be attached to the mouse to massage the patient thoroughly. The motor will be attached inside the mouse. The massaging wheels will be installed onto the plastic mouse base. The infrared LED lights will be hot glued into holes drilled into the mouse base. A power supply will be stored in the mouse to power each circuit with a switch to turn it on and off.

The mechanical phase is the creation of the physical ergonomic mouse. A design must first be created as a clay model. It will be modeled in a way such that it will be able to provide comfort for both hands while delivering the massage treatment. After creating a model, a mold will be created with the clay model using Plaster of Paris. Plaster of Paris will create mold, which will then be used to create a hollow cast that using liquid plastic, a sturdy material that will be able to withstand the pressure from the user. After the cast is created, It will be necessary to smooth the surface using sand paper

• Screws • Hot glue • Drill & Drill bits • Plastic Cutters • Duct tape • Sandpaper / Dremel • Solder / Solder Iron

Two rectangular holes were cut into the plastic base; they were big enough for the wheels to fit in and roll easily. The massaging wheels were originally part of a bigger massaging set. Two wheels and an axel were removed from the set and screwed on the plastic base suspended in the air by a wooden block. Two washers were inserted on the axel as well to separate the wheels from the plastic base and allow for a smooth rolling. The metal sheet attached to the wooden block and mouse is for extra support and sturdiness for the plastic base when pressure is applied. Lubricant is applied between the wheels, washers, and the wooden base for smooth rolling.

Right below the massaging wheels on the plastic base are the installed Infrared LEDs. All are aligned with the positive leads on the south side and the negative leads facing north. The leads are bent in the same direction and soldered together, forming one long parallel circuit of LEDs. Wherever the leads are not long enough, a wire is used as a makeshift jumper to reach the other LED leads. The green LED (as shown on the left) is an indicator LED to show when the circuit is on. Infrared LEDs do not emit visible light, so the green LED will indicate if the circuit is on.

A switch is installed into the side of the massage mouse by drilling a hole and using hot glue to install the switch into it. A circuit between the battery, switch and the vibration motor is created. By soldering the battery’s cathode to the motor’s anode; the motor’s cathode to the switch and the battery’s anode to the switch, a complete circuit is created with a switch that powers the whole circuit. When the switch is turned on, electricity runs from the battery to the motor, powering it on and vibrating the entire mouse.

The prototype is successful in delivering a comfortable

massage. Little to no strain is used on the fingers and more

focused on the biceps/triceps area. The massaging wheels

did an excellent job rolling and massaging. The infrared

lights and motor turn on with the flip of the switch and

function very well. The structure of the mouse however,

didn’t feel comfortable to some users, however. Using right

and left hands felt different one side being more

uncomfortable than the other. The plastic that is used as the

base of the ergonomic mouse is to flimsy and even with the

support of the metal strip across the mouse it is too weak

and feels as if it would collapse into the hollow area.

The vibration motor also is to weak and does not give a

significant impact when delivering a massage treatment.

However, overall, the prototype serves its function very well

and future modifications will certainly be added

The design of the mouse feels uncomfortable and different when using either left or right hands. A redesign of the ergonomic mouse will be necessary. A clay model will be readjusted to fulfill its ergonomic duties. The model should be vertically symmetrical so that left and right hands will feel comfortable and the same when delivering a treatment. Then A mold will be made with Plaster of Paris, and then a plastic cast will be created using the mold to create the new and improved ergonomic mouse

The plastic base that has the massaging wheels and Infrared LEDs installed onto is flimsy, bends easily, and is not sturdy. A stronger plastic should be used as the base of the ergonomic mouse to avoid breaking the mouse. To create this plastic base, an outline of the ergonomic base will be created and will be cut out using a band saw. Using a drill bit and drill all the holes for the screws, wheels and LEDs will be made. Finally all of the components will be attached to the stronger plastic

The vibration of a single motor was not enough to deliver effective treatment. A second motor should be added to the circuit. This can be done simply by de-soldering the motors cathode from the switch and soldering it to another motors anode and the cathode of that motor to the switch. Then hot glue the motor into the mouse. Another solution to this problem would be to apply vibration to the wheels more directly. The motor was glued onto the mouse far from the massaging wheels. Vibration was felt on the mouse, but not on the wheels. This could be solved if the vibration motor was attached to the wheels instead of the mouse

Massages are used to relax tight tissues and muscles in a patient by allowing blood and oxygen to flow to his or her muscles. Deep tissue massages are a specific type of massage treatment that is delivered through applying deep finger pressure and rubbing with the fingers and hands in areas where muscles are tight. This provides many benefits to the patient such as pain relief and psychological relaxation. However, this process may leave the massager in pain from straining one’s fingers. Physical therapists and masseurs use their fingers, forearms and elbows to deliver an effective treatment, however, they do so while enduing pain from awkward positions. Massage sessions can last from forty-five minutes to an hour to help their patients, but at the expense of their own comfort. This ergonomic mouse was created to reduce strain on the fingers and hands and focus more power from the bicep/tricep area, muscles that are meant to exert force and power into an object. A vibration motor installed on the mouse allows the skin tissue to massaged more effectively and Infrared LEDs causes the body to release a healthy gas, nitric oxide, which allows for blood flow to the applied area.

The completed version of this prototype has 3 main components: Mouse model and massage wheels, motor circuit and the LED circuit. The ergonomic mouse has massage wheels screwed onto the plastic base, which provides for the massaging aspect the prototype. A motor circuit is also attached onto the prototype. A switch (switch on the right) controls the flow of power in the motor circuit. It turns on the motor which provides for the vibration of the mouse. The LED circuit, like the motor circuit, is controlled by a switch (switch on the left). This switch controls the flow of power to all the LEDs. When turned on, the prototype emits infrared LEDs. With all three parts of the mouse, the prototype is completed. The massage wheels are the major part of the prototype while the vibration and LEDs provide extra functionality to those that use this prototype. This prototype is able to enhance a massage experience by adding vibration and infrared emissions.

To make a plastic ergonomic mouse, a clay model was first made. Then using Plaster of Paris and the clay model, a mold was created and cut to remove the clay mouse model (left). The mold was reattached and liquid plastic was spread along the sides of the mold until the liquid plastic hardened. Many layers of liquid plastic was added until the hardened plastic was thick and sturdy. The plastic was removed from the mold. Excess clay and plaster was removed with sand paper and dremel. Body filler was used to cover air bubbles in plastic (right). Finally, the mouse was spray painted a gray metallic color.