HK1210083A1 - Golf club for teaching or learning golf - Google Patents

Abstract

The invention relates to a golf club for teaching or learning golf, formed by a grip, a tubular shaft and various club heads, having suitable respective measurements. The golf club of the invention is made from very lightweight, low-hardness materials especially designed to prevent the user and/or companions from being injured. The tubular shaft is rigid, has very low malleability and is made from a very lightweight material, such as fibreglass or plastic. A solid heavy metal bar is press-fitted into the lower end of the tubular shaft in order to reinforce the shaft and to provide additional weight or ballast, said shaft being secured in the corresponding club head such that it can be used to play golf under the same conditions as those which apply to adults, to play golf in small spaces, and to teach golf to children, youths, teens (juniors) and the like.

Description

Golf club for helping player learn to play golf

Disclosure of Invention

The invention, as the name implies, is a purpose-made golf club, is used for playing golf in special places, is suitable for golf teaching of children, students, teenagers (teenagers) and the like, and has the design purposes that:

1. to avoid injury to the golfer himself, the ball partner or the accompanying person due to misuse or lack of understanding of how to use, the shaft is generally made of steel or graphite and the head of wood or metal in consideration of hardness and weight of the material (steel or graphite) actually used for the golf club, thus increasing the peripheral weight during play.

2. Facilitating practice of golf sports on special grounds.

3. Due to its technical characteristics and careful design, it is easy for golf beginners to use.

The invention relates to a golf club with technical characteristics and/or corresponding functions, which is beneficial to the formal development of golf (golf ball), in particular, the adopted material is light and has low hardness, the injury to a player, a ball partner or a fellow person caused by accidental knocking can be avoided, and the golf can be developed under the condition of the same as that of an adult.

Background

In fact, club child golf clubs (golf clubs), similar or identical to the clubs used by adults-but of different dimensions-use tubular shafts (shafts) of graphite or wood which are less stiff and less dangerous than steel. Also, the head (club head) is made of cast iron (cast iron) or forged iron (forged iron), and iron clubs (golf clubs) are heavier and more dangerous when accidentally hitting the golfer himself, a ball partner, or a fellow person.

There are other light clubs, which are made of plastic material, the whole tubular club body (club body) is made of plastic material, the club head (club head) is also made of the same material, and no spare parts or balance objects are needed, so the force is not enough when playing the ball. Other clubs have heads with compact foam-in-polyurethane layers with metal balance injected or cast into the head, with neither corresponding designs nor technical features.

In the above-mentioned case, teaching is performed with adult clubs (golf clubs), the accuracy is extremely low, and there are drawbacks in that it is difficult to guarantee passage from one grade to the next. The material special for the child club is used, and is precisely used for entertainment purposes, but has no technical purpose.

The material is applied in the following patents in China:

"Golf club head" invented by Meibiao 5335914, Clairang and Albani Ga.;

U.S. Pat. No. 5672120, "Golf club head" of Lameileis, Stant L.;

U.S. Pat. No. 7713143B 2, D. adjustable weight, Golf club head with customized face angle and adjustable weight and roller face, by Cletton Evans;

"golf club head with slotted socket" of U.S. Pat. No. 2003/0176235A 1, Bruce D. Burois;

"foam core golf club heads" of the invention, mei mark 2008/0318707 a1, mogi, jefferi t., selano, antoni d., jones, and david d.;

"Golf clubs and methods of operation" of the invention, Meibiao 5244211A 1, Lukasevitz and Robert F;

"Golf club head and its manufacturing process" of the invention of Mei Biao 4988104A 1, Shiotani, Tadahiko and Bian;

description of the invention

The invention is composed of a golf club, which is characterized in that a tubular shaft is hard, not easy to break, made of light material, as light as glass fiber (glass fiber) material or plastic material, and the lower end of the tubular shaft is embedded into the club head through a socket or socket of the club head. And, the solid pole that acts as golf club weight spare part of a heavy metal is inlayed through pressure at the lower extreme of tubulose body, is particularly useful for beating, carries out the tubular cover with glass fiber, plastics or other light material, can avoid hindering user and/or its accompanying personnel.

The installation of the pressure embedding heavy metal solid rod is completed through high-strength glue or adhesive, and syrup cyanoacrylate adhesive or similar substances are preferably used for bonding the heavy metal solid rod and the connecting area of the two parts inside the rod body (rod body) when the heavy metal solid rod is completely embedded into the tubular rod body (rod body), so that the heavy metal solid rod and the connecting area of the two parts inside the rod body (rod body) are connected into an integral body which can not be divided.

A solid rod of heavy metal embedded in the lower end of the tubular shaft (shaft) has a telescoping section of approximately the total length 1/4 or 1/3 of the tubular shaft (shaft). The heavy metal solid rod can reach the lower end of the tubular rod body (rod body) in one case, and is level with the tubular rod body; alternatively, a small portion of the upper end is exceeded; there is also a case where a hole of the tubular shaft (shaft) portion is left inside of the tubular shaft (shaft) portion, which is a small portion beyond the lower end of the heavy metal solid rod. The end of the tubular rod body (rod body) exceeds the part of the heavy metal solid rod and is not just stuck in the heavy metal solid rod.

The tubular shaft (shaft) of lightweight material, whether fiberglass or plastic, may be covered or wrapped with a cover, sleeve or flexible thin plastic tube such as rubber or latex, which may be wrapped around the shaft or wrapped around the shaft, in order to better and more effectively protect the user of the golf club or its accompanying person during the accidental striking of the golf club during use.

Each club head (golf club head) is correspondingly arranged at the lower end of the tubular club body, and according to the invention, the club head is embedded and is described as follows:

1. a head made of a stiff rod of light material, for example plastic, reinforced by a special conventional irregular oval design, with longitudinal grooves at the optimal striking position (optimal striking position); a thick rib is provided at the rear (rear) and at the lower front edge (front), typically about one third of its total height, and slopes downwardly towards the lower edge.

The head, its small radius end (the elbow of the club) is inclined further upwards than the other end (the tip) and in the direction of the above-mentioned end, a tubular socket (spigot) is formed for inserting and fixing the tubular end of the lower portion of the tubular shaft (club body). The club has a socket with ribs perpendicular to the socket and tangent ribs for fitting the projected part of the tubular club body to the socket, and the lower end of the club body has side slots and tangent slots for jointing the ribs. At the club head position of the whole club, there is a face angle (loft angle) inclined sixteen degrees toward the vertical axis and the socket direction and a sole angle (sole angle) inclined sixty-three degrees toward the horizontal axis.

2. A head consisting of a shaft made of semi-solid material, for example with a uniform and solid polyurethane coating. The club head is reinforced by a special conventional elliptical design with a right angled upper edge (top edge) and an inwardly bowed front edge (front edge), with a thicker club lower end (club lower end) and rear face (rear face) than the upper edge (top edge), forming a concentric wedge design defined by an unbalanced profile flange, with a longitudinal groove in the front face at the sweet spot (sweet spot), and a face angle (loft) that is inclined forty-six degrees to the vertical axis.

The small radius peak end (the elbow of the rod) is inclined upwards to form a spigot (socket) with a tubular projection than the other end (the tip), the spigot (socket) is provided with a rod base angle (rod base angle) inclined to the horizontal axis by sixty-three degrees, a heavy metal solid rod is embedded into the bottom angle of the rod base angle by pressure to fix one end of the tubular rod body (rod body), and the spigot (socket) is level with one end of the tubular rod body (rod body) or is provided with a section of the solid rod with the light heavy metal projection, so that the firmer rod head enters the junction of the heavy metal solid rod projection from the spigot or just reaches the tubular rod body (rod body) with the rod head during the batting. And glue is coated on the part of the club body inserted into the club head, so that the final club head is fixed more firmly.

3. -a head (head) consisting of a rod made of a semi-compact material, provided with a uniform polyurethane coating and reinforced by a special oval design, consisting of one end with a small radius (the elbow of the rod) smaller than the other end (the tip) and a projecting socket (spigot), eccentric and rising rhomboidally, with an axial reinforcement for embedding and fixing with pressure the lower end of the tubular shaft (shaft) near its solid bar of heavy metal fixed flat with the tubular shaft (shaft) or with a portion of the solid bar above the lower end of the tubular shaft (shaft), in both cases embedded up to the junction with the shaft or head (head), so as to make the head overall more stable during the driving of the ball.

The head (club head) has a face angle (club face angle) of zero degrees from the vertical axis and a sole angle (sole angle) of seventy-one degrees from the horizontal axis. And glue is coated on the part of the club body inserted into the club head, so that the final club head is fixed more firmly.

4. A head consisting of a stiff rod of light material, such as plastic (plastic), reinforced by a special oval and hollow design, designed: the outer layer is divided into two parts almost symmetrically, one part is used as the outer layer, the other part is used as the hole, and the two parts are mutually meshed in a concave-convex mode. Wherein the hole designed on one of its ends (the bend of the shaft) is inclined towards the rising tubular socket (spigot) for the insertion and fixing of the end of a tubular shaft (shaft). The socket, which may be perpendicular or tangential to the ribs on the inside, is a member for mounting a projection of a tubular shaft (shaft) to the socket, and has a side groove and a tangential groove at the lower end of the shaft, respectively, for engaging the ribs. The socket is designed on an insert in the hole and is composed of two parallel walls with different heights, and a tubular rod body (rod body) with a fixed heavy metal solid rod enters the socket.

The portion of the tubular shaft (shaft) entering the socket insert has opposed bores between which is mounted a pin inserted into a recess in the bottom of the socket extension in the bore to prevent the tubular shaft (shaft) from being pulled out of the bore. And, the tubular shaft body (shaft body) can be glued with glue to improve the fastening degree between each part, whether when embedding or when gluing, can prevent to rock. On the extension of the socket inside the hole or insert, on its outside and at the intersection of the socket apex and the hole, there are several reinforcements of the same height but of different lengths and at different angles to it. The bore has at least two recessed elements for engaging the outer layer of the male element, a peripheral flange for internal engagement and a semi-circular groove for mounting the socket on the tubular shank.

The whole assembly (hole/outer layer) may optionally be filled with a polyurethane foam or other material that reinforces and increases the load bearing capacity of the whole assembly (hole/outer layer) to enhance its tightness.

The above has a face angle of zero degrees from the vertical axis (face angle) and a sole angle of seventy-one degrees from the horizontal axis (sole angle).

In the legend:

FIG. 1 is a longitudinal sectional view of a part of a tubular shaft (shaft) of a golf club according to the present invention.

Fig. 2 is a perspective design view of a tubular shaft with a female adapter for mounting to a bayonet.

FIG. 3 is a detail plan view of the above-described recessed adapter for mounting to a bayonet on a shaft (shaft).

Fig. 3.1 is a detail plan view of the head (head) socket with bayonet boss adapter mounted to the tubular shaft (shaft).

Fig. 4 is a perspective design view of a tubular shaft (shaft) with a solid heavy metal rod inside, leaving a hole in the shaft for mounting a mounting adapter with a plug on the shaft.

Fig. 4.1 is the same external view as fig. 4, but with a solid bar of heavy metal flush with the shaft and an adapter with a plug for mounting the two to each other.

Fig. 5 is a perspective detail view of the pressure and adhesive mounting of a solid bar of heavy metal embedded in a tubular shaft (shaft).

Fig. 6 is a perspective design view of the front surface of the plastic head (head) of the iron (iron) club.

Fig. 7 is a plan perspective layout view of the same components as fig. 6.

Fig. 8 is a perspective view of the component of fig. 7 after one hundred and eighty degrees of rotation.

Fig. 9 is a side perspective layout view of the component of fig. 6.

Fig. 10 is a perspective design view of the front face of an iron (iron) urethane foam (urethane foam) head (head).

Fig. 11 is a perspective design view of the back surface (back surface) of an iron (iron) urethane foam (urethane foam) head (head).

Fig. 12 is a plan perspective design view of the club lower end (club lower end) of an iron (iron) urethane foam (urethane foam) head (head).

Fig. 13 is a side and plan perspective layout view of the components of fig. 10, 11 and 12.

Fig. 14 is a side perspective layout view of fig. 13 rotated ninety degrees.

Fig. 15 is an external view similar to fig. 6, with the bayonet adapter mounted to the tubular shaft (shaft) as seen in fig. 6-9, with a solid bar of heavy metal flush with the lower end of the tubular shaft (shaft).

Fig. 16 is an external view similar to fig. 15, with a plastic tubular shaft (shaft) insert bayonet adapter, with a solid heavy metal rod protruding from the lower end of the tubular shaft (shaft).

Fig. 17 is an external view similar to fig. 10, with an adapter and junction at the lower end of a tubular shaft (shaft) near a solid heavy metal pole level with the lower end of the tubular shaft (shaft) and on a polyurethane foam (polyurethane foam) head (head).

Fig. 17.1 is an external view similar to fig. 17, with an adapter and junction of a heavy metal solid bar protruding from the lower end of a tubular shaft (shaft) and on a polyurethane foam (polyurethane foam) head (head).

Fig. 18 is a perspective design view of a side surface of a head (head) of a urethane foam (urethane foam) putter (putter).

FIG. 19 is a side perspective layout view of one end of the component of FIG. 18.

Fig. 20 is a plan external view of the components of fig. 18 and 19.

Fig. 21 is a lower plan external view of the components of fig. 18-20.

Fig. 21.1 is a longitudinal sectional view of the head (club head) of fig. 18-21 with a heavy metal solid club projecting from the lower end of the tubular shaft (club shaft).

Fig. 21.2 is an external view similar to fig. 21.1, with a solid rod of heavy metal flush with the lower end of the tubular shaft (shaft).

FIG. 22 is a front view of the oval hole head (head) of the plastic putter (putter).

Fig. 23 is a front external view on the opposite side of fig. 22.

Fig. 24 is an upper plan external view of the fig. 22 and 23 components.

Fig. 25 is a perspective layout view of one end of fig. 24.

Fig. 26 is a front perspective layout view of the two component apertures and the interior of the outer layer of the kit of fig. 22-25.

Fig. 27 is a plan external view of fig. 26.

Fig. 28 is an external view of a tubular shaft (shaft) with a heavy metal solid bar being cut and mounted on the head (head) of fig. 20 to 27, which is flush with the lower end of the above tubular shaft (shaft).

Fig. 29 is an external view similar to fig. 28, with a tubular shaft (shaft) cut and fitted on the head (head) and with a heavy metal solid rod protruding from the lower end of the tubular shaft (shaft) in the upper view.

Fig. 30 is an external view similar to fig. 28 and 29, with a tubular shaft (shank) installed and cut transversely, and with a solid bar of heavy metal secured over the spigot.

Description of the drawings:

in the illustration, a set of golf clubs (1) includes their handles (grips), shafts (shafts) and heads (heads). The invention is a tubular shaft (shaft) 2 which is hard in texture, not easy to break and made of light material, light in weight as glass fiber (glass fiber) or plastic (plastic), and the lower end of the tubular shaft is embedded with a heavy metal solid rod 3 with pressure, the heavy metal solid rod is used as a weight part of a golf club and a reinforcing part of the tubular shaft (shaft) 2 in the area, so that the golf club is firmer and firmer, especially when playing a ball.

The installation of the pressure embedding heavy metal solid rod (3) is completed through high-strength glue or adhesive (8), and syrup cyanoacrylate adhesive or similar substances are preferably used for bonding the connection areas of the heavy metal solid rod (3) and the two parts inside the tubular rod body (2) when the heavy metal solid rod (3) is completely embedded inside the tubular rod body (2) so as to enable the heavy metal solid rod and the tubular rod body (2) to be connected into an integral body which can not be divided.

The heavy metal solid rod (3) embedded at the lower end of the tubular shaft (shaft) (2) has a telescopic part which is about the total length 1/4 or 1/3 of the tubular shaft (shaft) (2). The heavy metal solid rod (3) can reach the lower end of the tubular rod body (rod body) (2) in one case, and is level with the tubular rod body (rod body) (see figure 2); alternatively, a small portion beyond the lower end (see fig. 17); there is also a case where the solid rod (3) of heavy metal inside is shorter in length, a small portion (20a) cannot reach the tubular portion (see fig. 4) of the tubular shaft (shaft) (2) and a hole is left in the portion of the tubular shaft (shaft) (2). The end of the tubular rod body (rod body) (2) exceeds the part (20a) of the heavy metal solid rod (3) and is not just stuck in the tubular rod body.

The tubular shaft (2) of lightweight material, whether fiberglass or plastic, may be covered or wrapped with a cover, sleeve or flexible thin plastic tube (4) (see fig. 1) such as rubber or latex, which should wrap around the tubular shaft (2) in the proper location or in its entirety, in order to better and more effectively protect the user of the golf club (1) (golf club) or its accompanying personnel during use in the event of an accidental hitting of the club.

Each club head (golf club head) is correspondingly arranged at the lower end of a tubular shaft (shaft body) (2), and according to the invention, the club head is a built-in club head which is described in detail as follows:

1) a head (9) (see fig. 6-9) made of a stiff rod of light material (see fig. 6), such as plastic, reinforced by a special conventional irregular oval design, with longitudinal grooves (10) at the sweet spot (sweet spot); a thick rib (11) (see fig. 8) is provided on the back side (back side) and at the front edge (front edge), typically about one third of its total height, and slopes downwardly towards the lower edge.

The head (9) has one end (elbow of club) with small radius inclined upwards than the other end (tip) and has a tubular socket (90) for inserting and fixing the lower end of the tubular shaft (2). The vertical ribs (30) are arranged in the insertion opening (insertion opening) (90) of the club, are tangent to the insertion opening (insertion opening) and are used as parts for installing the protruding part of a tubular club body (club body) (2) in the insertion opening, and the lower end of the club body is respectively provided with a side groove and a corresponding cutting groove (5) (see figure 2) for jointing the ribs (30).

The whole club head (9) has a face angle (club face angle) inclined by forty-six degrees toward the vertical axis and the direction of the insertion opening (insertion opening) (90), and a sole angle (sole angle) inclined by sixty-three degrees toward the horizontal axis.

2) A head (12) consisting of a rigid shaft made of semi-solid material (see fig. 10 to 14), for example with a uniform and solid polyurethane coating. The club head (12) is reinforced by a special conventional oval design with a right angled upper edge (upper edge) (12a) and an inwardly bowed front edge (front edge) (12b), with a thicker club lower end (club lower end) (15) and rear face (rear face) (14) than the upper edge (upper edge) (12a), forming a concentric wedge design (14a) centered on an unbalanced cross-sectional flange, with a longitudinal groove in the front face at the sweet spot (sweet spot) (10a), and a face angle (loft) that is angled four sixteen degrees toward the vertical axis.

The small radius peak end (the elbow of the rod) is inclined upwards to form a tubular projecting socket (13) than the other end (the rod tip), the small radius peak end (the elbow of the rod) is provided with a rod base angle (rod base angle) inclined to sixty-three degrees towards the horizontal axis direction, a heavy metal solid rod (3) is embedded into the small radius peak angle and fixes the lower end of the tubular rod body (rod body) (2) inside the small radius peak angle by pressure, the small radius peak end is level with the lower end of the tubular rod body (rod body) (2) (see figure 17) or is provided with a section of light heavy metal (31) solid rod (3) (see figure 17.1) projecting from the end of the tubular rod body (rod body) (2), and the heavy metal solid rod enters the junction with the rod head (rod head) (12) through the socket (13), so that the rod head part is.

3) A head (16) (see figures 18 to 21.2) consisting of a rod made of semi-solid material, for example with a uniform polyurethane coating, and reinforced by a special oval design, consisting of one end with a small radius (the bend of the rod) (19) smaller than the other end (the tip) (19a) and a projecting socket (16a), eccentric and rising in a rhomboidal shape, with an axial reinforcement (17) for inserting and fixing, with pressure, the lower end of the tubular shaft (2) near its solid bar (3) of heavy metal fixed flat with the tubular shaft (2) (see figure 21.2), or with a portion of the solid bar (32) (see figure 21.1) above the lower end of the tubular shaft (2), in both cases, is embedded up to the junction with the shaft or head (16) to make the head overall stronger in playing.

The head (head) (14) has a face angle (face angle) of zero degrees from the vertical axis and a sole angle (sole angle) of seventy-one degrees from the horizontal axis.

4) A head (20) made of a stiff rod of light material (fig. 22 to 30), such as plastic (plastic), reinforced by a special oval and hollow design: almost symmetrically divide it into two parts, one part as the outer layer (22) and the other part as the holes (21) (see fig. 26), the two parts are engaged with each other in a concavo-convex manner: a concave part (23) and a convex part (24), wherein a socket (25) is arranged on the hole (21), and a tubular shaft (shaft body) (2) fixed by a plug pin (7) is arranged on the socket; a method for fixing a tubular shaft (shaft) (2) of a head (20) is to mount it in a position eccentrically inclined to one end at a lie angle (lie angle) inclined seventy one degree to a horizontal axis by a rising socket (25).

The insertion opening (insertion opening) (25) is provided with a vertical rib (30) inside, is tangent with the insertion opening (insertion opening) (25), is used as a convex part for installing a tubular rod body (rod body) (2) on the insertion opening, and is provided with a corresponding side and a tangent concave part (5) on the lower end for installing each rib (30).

The portion (20a) (see figure 4) of the tubular shaft (2) entering the socket (25) insert (26) has two opposed bores (6) between which is mounted a pin (7) inserted in the bore or in the recess (23a) of the socket (25) extension (26) in the insert (26) which prevents the tubular shaft (2) from being pulled out of it. The degree of tightening on the insert (26) and on the application thereof is thus prevented from wobbling, in particular when engaging or fitting onto the bayonet.

In the hole or in the insert (21) in the extension (26) of the socket (25), on its outside and at the intersection of the point of the socket (25) with the hole (21), there are several reinforcements (28 and 28a) of the same height but of different lengths and at different angles to the same. The bore (21) has at least two recessed elements (23) for male-female engagement with an outer layer (22) having two further spare male elements (24), a peripheral flange (29) for internal engagement and a semi-circular groove (29a) for mounting a spigot (25) on a tubular shank (2).

The socket (spigot) (25) is designed on an insert (26) in the hole (21) and is composed of two parallel walls with different heights, and the tubular rod body (rod body) (2) with the fixed heavy metal solid rod (3) enters the interior of the socket (spigot) (2) and is flush with the end of the tubular rod body (rod body) (2) (see figure 28), or the heavy metal solid rod (3) just reaches the limit of the plug pin (7) (see figure 30), or the heavy metal solid rod (3) exceeds the lower end of the tubular rod body (rod body) (2) (see figure 29) so as to be embedded and fixed at the end of the tubular rod body (rod body) (2).

The kit (20) (holes (21)/outer layer (22)) may optionally be filled with a polyurethane foam or other material that reinforces and increases the load-bearing capacity of the kit (holes/outer layer) to enhance its tightness. The club head (20) has a face angle that is inclined at zero degrees to the vertical axis.

The club head (20) has a face angle (loft) that is inclined at zero degrees to the vertical axis.

Claims (20)

1. Golf club for teaching or learning golf, consisting of a corresponding tubular shaft (2) and its various golf heads and respective adapters adapted thereto, as well as an adapted grip made of a material which is not very heavy, soft and light, to prevent the user and/or his partners from being injured; characterized in that the golf club (1) has a hard tubular shaft (2) with low ductility, which is made of a light material which is not very heavy, such as glass fiber or plastic, and a solid heavy metal rod (3) is press-fitted at the lower end of the shaft to reinforce the tubular shaft (2) and provide additional weight or weight, and then fixed with the respective golf head.

2. Golf club for teaching or learning golf, made of a corresponding variety of golf heads and adapted as such, characterized in that it is constituted by:

a rigid golf head (9) made of light material such as plastic, reinforced with a special design;

a golf club head (12) comprising a piece of semi-rigid material such as a mass of polyurethane foam covered with a uniform layer, also of special design;

a golf club head (16) made of a semi-tight material, namely a mass of polyurethane foam and a uniform oval layer; and

golf club head (20) having an oval hollow body of lightweight rigid material such as plastic, divided into two almost symmetrical parts, one forming a cover (22) and the other a box (21), and the two parts are joined together by a dovetail joint.

3. The golf club for teaching or learning golf according to claim 1, wherein the press-fitting of the solid heavy metal rod member (3) is ensured by adding an additional super glue or adhesive (8), and the super glue or adhesive (8) is applied to the solid heavy metal rod member (3) and the contact position of the rod member with the tubular shaft (2) before the solid heavy metal rod member (3) is positively fitted into the lower end of the tubular shaft (2).

4. A golf club for teaching or learning golf according to claims 1 and 3, said solid heavy metal rod (3) being fixed to one end of a tubular shaft (2), characterized in that it extends to about 1/4 or 1/3 of the total length of said tubular shaft (2) in such a way that the solid heavy metal rod (3) in one case reaches the lower end of the tubular shaft (2) and is flush with it; in another case, the end of the metal rod is more than a small part; and in yet another case, the tubular body of the tubular shank (2) exceeds the solid heavy metal bar (3) by a small portion (2 a), the interior of said portion of said tubular shank (2) being hollow.

5. The golf club for teaching or learning golf according to claim 3, the portion (20a) of the end of the tubular shaft (2) beyond the solid heavy metal shaft (3) being characterized in that it does not require any glue inside.

6. Golf club for teaching or learning golf according to claim 1, the tubular shaft (2) made of fibreglass or plastic being characterized in that it is optionally coated or wrapped with a cover, shell or sleeve (4) made of soft material such as rubber or latex, fitting or fitting tightly with said tubular shaft (2).

7. Golf club for teaching or learning golf according to claim 1, the tubular shaft (2) being press-fitted with the golf heads (9), (12), (16) and (20), characterised in that it is ensured by the addition of an additional super glue and adhesive substance (8) applied at the point where the shaft comes into contact with the necks (90), (13), (16a) and (25) and/or the inside of the golf heads (9), (12), (16) and (20) before the fitting is established, thus increasing and increasing the strength of the final bond.

8. Golf club for teaching or learning golf according to claim 2, the golf head made of light plastic material being reinforced with a special extra irregular oval design, characterized in that the top of the heel end, whose diameter is smaller than that of its toe end, protrudes upwards towards said end forming a tubular neck (90) to engage and fix the lower tubular end of the tubular shaft (2); the outer part of the hosel (90) consists of vertical ribs (30), is tangent to the hosel (90) and serves as a male bayonet mounting part with the tubular shaft (2), the lower end of the hosel is provided with a lateral opening (5) which is matched with the ribs (30), and the golf head (9) is provided with a longitudinal groove (10) at the optimal hitting position; the thick ribs (11) of the rear and front edges slightly exceed its height 1/3 and decrease at the projection towards said front edge; it has a preferred inclination of 46 ° with respect to the vertical axis and the hosel has a preferred base angle of 63 ° with respect to the horizontal axis.

9. Golf club for teaching or learning golf according to claim 2, the golf head (12) being made of a hard sheet-like semi-rigid material such as a lot of polyurethane and being coated with a uniform and rigid layer, characterized in that the heel of the tip has a smaller diameter than its toe end, extends upwards as a tubular neck (13) and projects in a tubular form with a base angle of preferably 63 ° with respect to the horizontal axis, wherein the end of the tubular shaft (2) is fixed and press fitted with a solid heavy metal rod (3) which is flush with the lower end of the tubular shaft (2) or the solid heavy metal rod (3) projects slightly over a part (31) of the lower end of the tubular shaft (2) and penetrates the neck to be connected inside the body of the golf head (12).

10. Golf club for teaching or learning golf according to claims 2 and 9, the golf head (12) being characterized in that it is likewise reinforced by a special additional oval design with a straight top edge (12a) and an inwardly arched front edge (12b), the bottom edge (15) being thicker than the top edge (12a), the rear side forming an accessible concentric plane (14a) defined by an irregularly contoured flange, its front face presenting a longitudinal groove at the sweet spot (10a) and its inclination being preferably 46 ° with respect to the vertical axis.

11. A golf club for teaching or learning golf according to claim 2, said golf club head (16) being made of a hard sheet-like semi-tight material, such as a large amount of polyurethane, coated with a uniform and tight layer, likewise reinforced with a special oval design, characterized in that the heel end (19) has a smaller diameter than the toe end (19a), the protruding neck (16a) is non-concentric and prismatic upwards, provided with an axial reinforcement (17) to fix and press-fit the solid heavy metal bar (3) at the lower end of said tubular shank (2), the solid heavy metal rod piece is fixed to be flush with the lower end of the tubular rod body (2), or a portion (32) of said solid rod element exceeds the lower end of said tubular shank (2), in both cases the solid rod is inserted down into the internal connection of the golf club head (16).

12. A golf club for teaching or learning golf according to claims 2 and 11, said golf head (16) having an inclination of preferably 0 ° with respect to the vertical axis and a base angle of preferably 71 ° with respect to the horizontal axis.

13. Golf club for teaching or learning golf according to claim 2, said golf head (20) being made of light material, such as plastic, reinforced with a particular oval design, and wherein the hollow is formed in such a way as to be divided into two almost symmetrical parts, characterized in that one part forms the cover (21) and the other part forms the box (22), the two parts being joined together by means of a female dovetail joint (23) and a male dovetail joint (24) comprised, said box (21) having a neck (25) to be fixed to the tubular shaft (2); the tubular neck (25) is directed upwards in a non-concentric position with the (toe) end and is inclined upwards at a base angle of preferably 71 ° relative to the horizontal axis.

14. Golf club for teaching or learning golf according to claims 2 and 13, said neck (25) being characterized in that it extends inside the box (21) in a compartment (26) comprising only two parallel walls of different height for the insertion of the tubular shaft (2) of the rod (3) with the heavy metal fixed inside, the end of said shaft (2) being flush with the rod (3) of the solid heavy metal, or even said solid heavy metal rod (3) reaching the limit of the fastener (7) or beyond said shaft (2).

15. Golf club for teaching or learning golf according to claims 2, 13 and 14, the neck (25) being characterized in that it has an external vertical rib (30) tangential to the neck (25) and serving as a male bayonet mount with the tubular shaft (2) and comprising a female part (5) of the respective end fitting laterally and tangentially to the rib (30).

16. Golf club for teaching or learning golf according to claims 2, 13, 14 and 15, optionally the inner said combination (20) (box 21/cover 22) being characterized in that it is filled with polyurethane foam.

17. Golf club for teaching or learning golf according to claims 2, 13, 14 and 15, the neck (25) of the golf head (20) being characterized in that it has an inclination of preferably 0 ° with respect to the vertical axis and a base angle of preferably 71 ° with respect to the horizontal axis.

18. Golf club for teaching or learning golf according to claims 1 and 5, the portion (20a) of the tubular shaft (2) entering the spacer (26) of the neck (25) being characterized in that it contains two opposite drillings (6) between which are mounted fasteners (7) fixed at the centre (23a) of the female flange located at the extension (26) to prevent the tubular shaft (2) from being pulled out.

19. Golf club for teaching or learning golf according to claims 2 and 13, said extension (26) or spacer of the neck (25) in the whole (20) being characterized in that it is provided on its outside with stiffeners (28 and 28a) of the same height and different length, incorporated in the box (21) and in the vertex of the neck (25).

20. Golf club for teaching or learning golf according to claims 2 and 13, the box (21) being characterized in that it has at least two female parts (23) to cooperate with the cover (22) through a dovetail joint, it also has two further complementary male parts (24) and externally cooperate with a peripheral flange (29) and a semicircular collar to retain the neck (25) when the tubular shaft (2) is mounted.