Title of the invention: -
Pen gripper with phase change material Field of the invention: -
The present invention relates to the field of pen and particular relates to the pen gripper embedded with phase change material (PCM)for long time writing without strain to the holder.
Prior art to the invention: -
A patent document with application number "201743038325", titled with "A sterile protective cover comprising adevice for ophthalmic delivery", describes, "Described herein does a sterile protective cover comprise an intracameral therapeutic agentdelivery device in the form of a pen-injector comprising a cartridge container for dispensing multiple doses of a medicament, coupled to an actuation assembly within a housing. A needle assembly is coupled to the distal end of the cartridge container, provided with a removable cap received within the housing will be in optional pre-sterile or no-sterile condition. Use of such device for the prevention or treatment of ocular conditions or diseases is also disclosed.A sterile protective cover comprising ophthalmic device, wherein the sterile protective cover is made of plastic, polythene, polyethylene, resin, rubber, polystyrene, polypropylene, polycarbonate, nylon, or combination thereof.More, particularly the present invention relates to a novel ophthalmic device of reduced length and diameter in the form of a pen-injector for precise and controlled delivery of different doses of a therapeutic agent by introducing a unique "Pen grip "for the device. The present invention also depicts a novel ophthalmic device comprising a multimode power on-off button that would also work with a "Pulse mode" to deliver a fixed quantity of medicament and also double up as a speed control to control the rate of injection".
A patent document with application number "201821947541.5", titled with "Multi-finger pencil grip", describes, 'The utility model provides a multi-finger pen holder, and belongs to the technical field of stationery. The problem that an existing pencil grip is poor in correction effect is solved. The multi-finger pen holder comprises a sleeve body, a pen hole penetrating through the sleeve body in the axial direction of the sleeve body is formed in the sleeve body. An index finger sleeve is fixedly connectedto the outer side wall of the sleeve body; the outer side wall of the glove body is also fixedly connected with a thumb sleeve; the pen grip further comprises a straight-rod-shaped grip body and a semi-annular middle finger ring, one end of the grip body is fixedly connected with the sleeve body, the other end of the grip body extends outwards and is bent to form a bent portion, one end of the middle finger ring is fixedly connected with the sleeve body, the other end of the middle finger ring is fixedly connected with the grip body, and an embedded notch is formed between the bent portion and the middle finger ring. The multi-finger pen holder has the advantage of being good in correction effect".
wherein, the present invention providesthe pen grip with phase change material for long term writing without strain to the hands.

Objects of the invention: -
The primary object of the present invention is to provide pen grip which is strain free for long hours writing.
Summary of the invention: -
The usage of writing pen is still in existence, even though many advanced digital technologies is dominating the globe. Many offline exams are still conducted all over world, which are extended for about 3 hours. During this kind long term usage of pen provides strain to the hands. So, the present invention focuses on designing the grip without any strain to the hand's even in the case of long hours of usage of pen.
Brief description of diagram: -
Figure 1 is theschematic representation of pen gripper with PCM

Detailed description: -
The following specification particularly describes the invention and the manner in which it is to be performed as pen gripper for effective long hours writing.
The writing pen is part of everyone's life which is being used since it is invented. The are various forms of pen that used based on the ink type and method of revealing the refill of the pen. The digital technology is getting advanced day by day, leads to the usage of digital pen in this world. All the other technologies growing parallel still usage of pen is not completely eradicated. It occupies considerable position in the world, particularly when using it for long time it gives strain to the user because the pen grip is solid.
Embodiment comprises of apen (l)and agrip with PCM (2) to make the present invention effective to write for long hours without any strain to the hand. The user holds the pen (1) in the grip. The grip made with Phase Change Material (PCM) which comprises of wax beads and addition of some carbon. These two combinedly made the out as grip. The manufacturing difficulty may raise to get the shape and.other related equipment. In that case, it can be converted to addition of some polymer materials. When user starts writing by holding the grip, the heat generated in our body through the hand transmitted the grip of the pen (1). The grip with PCM (2) absorbs the heat and started melting. Once the PCM is melted to limited extend, it won't become liquid. The state conversion is from solid to semi¬solid state, based on this criterion only the material for PCM is chosen.lt starts melt in around 24 degree Celsius and stay in semi-solid state till 60 degree Celsius. So, the complete melting doesn't occur in this case. In this semi-solid the grip is strain-less to hold and become flexible gripper. The hard-solid grip became semi-solid for better comfort even which is used for hours together. The grip become solid when the user is not using the pen by liberating the heat to the atmosphere.

Claims:-
1) We claim,
A pen gripper with phase change material: comprises of,
A pen (1): and
A grip with PCM (2);
wherein, the pen (1) embedded the grip with PCM (2) provides long hours of writing effectively.
2) The pen gripper with phase change materialas claimed in claim 1, wherein,the pen's grip
is completely strain-free for the user for long hours because of the gripper is made out of
PCM which absorb the heat and gets melted and became flexible.