FIELD OF THE INVENTION

The invention relates to a bicycle trainer wheel with manual knob adjustable arrangement for positioning the trainer wheel more particularly to avoid physically removing the whole trainer wheel arrangement from the bicycle when not desired in use.

BACKGROUND OF THE INVENTION

A beginner seldom rides the bicycle with proper balancing. The learner depends on somebody to hold the cycle till the beginner can balance the cycle and move on their own. The bicycle has only two wheels front and the rear and thereby it is difficult for the learner to balance the bicycle vertically upright during the learning period. Trainer wheels are additional third and/or fourth wheel mounted generally parallel to the rear wheel of the two wheeled bicycle, so as to make the vehicle balance as if it has four wheels and to develop a sense of balance in the rider. The balance wheels assist the rider when the bicycle Is leaning; otherwise they are not contacting the ground. The trainer wheels allow the rider to learn balance, coordination and agility. The trainer wheels keep the bicycle stable as the rider pedals the vehicle. Hence, the previous inventions were made with support trainer wheel attachments. These will help the rider ride the cycle without falling even if the learner leans to a particular side. The rider psychologically feels unsafe without the support trainer wheel even after spending adequate time in learning; hence they use the support wheel for longer duration. There is no easy method to check the level of learning. They have to physically remove the trainer wheel to evaluate the level of learning. Even after doing so they may expect someone else to follow them. Further it has to be refitted again If the learner fails in the evaluation of the riding skill. Keeping In mind the trainer wheels are temporary as the rider becomes more comfortable the wheels should gradually play less and less of direct contact with ground for stabilization. Finally as a rider can mount the bicycle with confidents and ride in a straight line without wobbling to left or right, the rider may be ready to remote the training wheels entirely.

To physically separate the trainer wheel he /she require hand tools and exertion of physical effort. The learner may not possess / able to exert these at the time of need
and they have to depend on others such as a mechanic to help them. Thus the learner cannot disengage or engage the trainer wheel as and when he/she likes it. Generally the trainer wheel has to be installed for use and removed when not desired. Conventionally nut and screw mechanism is widely prevailing. Firstly, the trainer wheel has to be attached securely to the bicycle and thereafter it has to be fitted according to the measured level of how much of the wheel needs to touch the ground compare to the main wheel of the bicycle. Generally the trainer wheels are pulled up just enough, so that the bicycle can just rock giving the rider some sort of independence of motion and they feel like they are balancing on their own. The procedure to install, remove and reinstall during training period of this trainer wheel from the bicycle is painful, difficult and time consuming.

Some of the prior art which are relevant to this subject matter is detailed below:

The EP 0474361 relates to a retractable support for a bicycle comprises a prop adapted to be coupled to the bicycle to be displaceable from arrest position to an in- use position. The prop comprises an angled arm that terminates at one end in an axially rotatable wheel, the other end of the arm being coupled to the bicycle. A spring urges the prop to the rest position. An abutment is positioned between the ends of the arm, whereby in use, the prop is engage able by the foot of the cyclist to displace the prop against the spring into the in use position where the wheel engages the ground, and downward foot pressure on the abutment holds the prop in use position to stabilize the bicycle. Release of the foot pressure causes the prop to be biased to the rest position. In the cited patent the trainer wheel gives balance to the user on one side only, so it's difficult for an unskilled person to rides the cycle with this trainer wheel as disclosed in this patent.

The US patent 3,746,367 relates to a retractable bicycle training wheels assembly includes an L-shaped bracket is attached to a vertical structural member of a bicycle. Pivotally attached to the bracket is a plate which folds between a raised or a lowered position and latches in either of these two positions. A second embodiment incorporates an adjustable sliding collar which causes a strut to be fixed in either a raised or a lowered position. Auxiliary wheels are mounted on the plate in the first embodiment and at the end of the strut in the second embodiment. A third embodiment of the invention involves a wheel on a bracket which rotates from a lowered position into a raised position. In this patent a detent ball or captured member is fixed on the hole in the attachment plate, this arrangement holds the trainer wheel. This patent has been cited on prior art 6,976,693, its clearly bringing the disadvantage of the patent. The cited patent discloses retractable training wheels having a left and a right retractable mechanism and a left and right training wheel attached to the respective mechanism. The left mechanism is retractable independently from the right mechanism. Accordingly, an unwanted unbalance might occur if one wheel retracts more than another wheel.

The US patent 13, 691, 16 discloses a stabilizing system operated by a hand operated lever action, which is more complicate to perform the operation.

Of the above cited patents as much as these patents offer the advantages of the trainer wheels when affixed onto the bicycle they do not offer easy detachment and reattachment number of times during the training period.

OBJECTIVE OF THE INVENTION
The first objective of the Invention Is to implement the easy engagement and disengagement arrangement of the trainer wheel without physically removing the whole trainer wheel arrangement from the bicycle. While the detachable types of prior art are useful it requires that the rider must actively detach or attach for each removal and fitment of the training wheel onto the bicycle on every single occasion and during each testing of the progress of the riders skill. None of them offer the scope of the trainer wheel being attached to the vehicle but being detached for the purpose of functioning. Once the trainer wheel is fixed onto the bicycle it functions as a trainer wheel all time. The effort of attaching and detaching is thereby manual and highly inconvenient for the rider to repeatedly attach, detach and reattach until the rider achieves the desired level of competency in the riding skill at which point the trainer wheel is detached and permanently discarded by the rider. Therefore It Is desirable in the present situation to develop trainer wheels for a bicycle that has a simple construction and that which can be made to detach easily when not in use without actual physical detachment of the rider wheel from the bicycle.
SUMMARY OF THE INVENTION
The present invention relates to the trainer wheel assembly in bicycle
The present invention makes possible the engagement and disengagement of trainer
wheel without physically removing the whole arrangement from the bicycle.
BRIEF DESCRIPTION OF THE DRAWINGS:
The features, functions aspects and advantages of the present invention will become better understood with regard to the following descriptions and accompanying drawings.

Fig 1 illustrates the exploded detailed drawing of the trainer wheel assembly. DESCRIPTION OF THE INVENTION:
The following is the description of the preferred embodiments of the invention with supporting drawings.
The Retractable trainer wheel mechanisms function as detailed in the figure (Fig 1).
The invention relates to a trainer wheel assembly of a bicycle used to engage and disengage the trainer wheel without physically removing the whole arrangement from the bicycle.
The trainer wheel assembly has outer square block(1), inner square block(2), Push knob(3), trainer wheel (4), top "c" strip/ top Shaft(5), bottom "c" strip/bottom shaft(6), Trainer wheel shaft (7), hole on outer block (8), spring (9), supporting surface (10).
The trainer wheel assembly includes:
It has two square blocks, one is the outer square block and the other is the inner square block which can fit into the outer square block. This outer square block is welded to a "C"-section steel strip which can be mounted on the rear axle. The inner square block is connected to the wheel by means of another "C" -section steel strip. A push knob is connected to the Inner square block by means of trainer wheel shaft and held in position by a compression spring.
By pressing the knob against the spring and rotating it by 90 deg, the trainer wheel can be locked in the disengaged position which is at90 deg to the engaged position. Now the trainer wheel will not touch the ground.
To engage the trainer wheel, the knob is pressed till the inner square block comes out of the outer square block. It is then rotated in the anticlockwise or clockwise direction and the spring is released. In this position the wheel touches or is about to touch the ground. The spring force ensures the inner block is held in place inside the outer block.
While the rider learns he/she can keep the trainer wheel on engaged position. After gaining confidence he/she may keep this on disengaged position and try cycling. If the learner has gained confidence, he/she can continue cycling in the disengaged position else they can push the knob and get back to the engaged position.
As such it is clear that the trainer wheels as described herein provide a simple but challenging mechanism for learning and riding a bicycle which affords stability and provides flexibility to the rider. The rider can make the trainer wheels functional or non-functional without actually detaching the attached trainer wheels. The mechanism is simple and low in cost.
Although the description above contains many embodiments, specifications these should not be construed as limiting the scope of the invention but are merely providing illustrations of some of the presently preferred embodiments of the invention. Thus the scope of the invention should be determined by the appended claims and their legal equivalents rather than by the examples, embodiments and illustrations herein given.
The feature that is exhibited by the bicycle is the attachment of the trainer wheels onto the bicycle. The trainer wheel is so fixed that it can be made functional In one position which is just above the ground and made non-functional when It Is pulled up much above the ground. This being the two positions of the trainer wheel there is no need for the rider learning the bicycle to detach the trainer wheel during training, during testing and thereafter. The training wheel, each of which Is novel in the aspect that there is a bottom shaft (6) terminating fixedly onto the training wheel at one end of the shaft marked as (6a) in the drawing. There is an inner square block (2) fix at its bottom surface marked as (2a) in the drawing to the other end of the bottom shaft. A top shaft (5) terminates on a rear axle at one end of the shaft (5a). A outer square block (1) is fixed to the top surface (1a) and to the other end of the top shaft marked as (5b). Further it is provided with a mounting hole (8) on its side surface marked as (lb) which is closure to the bicycle wheel. A training wheel shaft (7) of the training wheel (4) is fixed at one end marked as (7a) on the side surface (2b) of the inner square box and its other end (7b) is adapted to pass through the hole (8) of the outer box (1). A spring (9) and a push button (3) is also provided such that after the wheel shaft (7) is passed through the hole (6) the spring (9) Is mounted and it is locked with the push button (3). The said outer box has a side surface (Id) which is farthest away from the bicycle wheel and closest to the Inner box as an open surface. It has a front (1c) surface and rear (1e) surface open optionally. It has bottom surface (If) also open. The said side open surface (Id) allows the sliding movement of the inner block (2) into and away from the outer block (1) when the bottom shaft is positioned downwardly towards the supporting surface (10) which is when the training wheel is made functional. The said front surface (1c) and said rear surface (1e) also allow the slideable movement of the inner block (2) into and away from the outer block (1) when the bottom shaft (6) is positioned parallel to the supporting surface (10).
The training wheel (4) is thereby may be positioned into two different position. The first position is locked with push button wherein the inner square block (2) is located in and inside the outer square block (1). The bottom shaft (6) is made to extent downward perpendicular to the ground supporting surface (10) enabling the trainer wheel (4) to contact the supporting surface (10) when the bicycle tilts or wobbles and this position is referred to as operation position. The training wheel is lockable in the second position also. In this position inner block (2) is located (at 90 deg with respect to the operation position) towards and within the outer block (1) and in this position bottom shaft (6) extends parallel to the supporting surface (10) so as to keep the training wheel lifted of the ground and not allowing the training wheel (4) from contacting the supporting surface (10) under any circumstance. This position referred to as retracted position. As illustrated in the drawing, the bottom shaft (6) preferred to be a "C" shaped strip but not limited to this. The top shaft (5) is also preferred to be a "C" shaped strip and this also is not limited to this description. The training wheel shaft (7) is preferred to be a cylindrical shaped shaft. However it may be square, rectangular, it may be hollow or solid. None of these shapes limit the working of the invention.
ADVANTAGE OF THE INVENTION:
1. The trainer wheel is used to reduce the learning time of the cycling.
2. The arrangement of the trainer wheel improves the trainer wheel functional requirements.
3. The trainer wheel arrangement reduces physical effort to engage the wheel position either in vertical or horizontal position.
4. The trainer wheel has a simple and inexpensive construction.
5. The flexibility afforded allows raising and lowering of the trainer wheels very easily without detaching the trainer wheels.

WE CLAIM:
1. A bicycle for moving on a supporting surface provided with plurality of trainer wheels characterized in the said training moveable wheels (4), being mounted at the rear side, wherein each training wheel mounting means is characterized with :
- a bottom shaft (6) terminating fixedly on the training wheel at one end of the shaft (6A)
- an inner square block (2) fixed at its bottom surface (2A) to the other end of the said bottom shaft (6B)
- a top shaft (5) terminating an rear axle at one end of the shaft (5A)
- an outer square block (1) fixed at its top surface (1A) to the other end of the said top shaft (5B) and further provided with a mounting hole (8) on its side surface (1B) closer to the bicycle wheel
- a training wheel shaft (7) of the training wheel (4) is fixed at one end (7A) on the side surface (28) of the inner square box and the other end (7B) is adapted to pass through the hole (8) of the outer box (1)
- a spring (9) and a push button (3) is provided, such that after the wheel shaft (7) passes through the hole (8), the spring (9) is mounted and push bottom (3) is locked
- the said outer box (1) having the side surface (1D) (farthest away from the bicycle wheel) and closet to the inner box open, having front (1C), rear (1E) or both surfaces (1C and 1E) open and having bottom surface (1F) also open, the said side open surface (1D) allows the slideable movement of the inner block (2) into and away from the outer block (1) when the bottom shaft (6) is positioned downwardly towards the supporting surface (10) and the said front (1C) and/or the said rear (1E) open surfaces allow the slideable movement of the inner block (2) into and away from the outer block (1) when the bottom shaft (6) is positioned parallel to the supporting surface (10)
- wherein the training wheel (4) being repositionable between a push button locked first position thereof wherein the inner square block (2) is dislocated away and outside the outer square block(l) and the bottom shaft (6) extending downwardly perpendicular to the supporting surface (10) so as to allow the training wheel (4) to contact the supporting surface (10) referred as operation position and a push button locked second position thereof wherein the inner block (2) is located towards and within the outer block (1) and the bottom shaft (6) extending parallel to the supporting surface (10) so as to lift the training wheel (4) and disallowing the training wheel (4) from contacting the supporting surface (10), referred as retracted position.

2. The mounting means claimed in claim 1 is such that the bottom shaft (6) is preferably a 'c' shaped strip.

3. The mounting means claimed in claim 1 is such that the top shaft (5) is preferably a 'c' shaped strip.

4. The mounting means claimed in claim 1 is such that the training wheel shaft (7) is preferably a cylindrical shaped shaft.

5. The bottom shaft (6) of the mounting means claimed in claim 1 Is such that wherein the bottom shaft (6) may be cylindrical, square, rectangular, hollow, solid or any cross-section.

6. The top shaft (5) of the mounting means claimed in claim 1 Is such that wherein the top shaft (5) may be cylindrical, square, rectangular, hollow, solid or any cross-section.

7. The training wheel shaft (7) of the mounting means claimed in claim 1 is such that wherein the training wheel shaft (7) is may be cylindrical, square, rectangular, hollow, solid or any cross-section.