JP2006026061A - Putting motion training apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a putting motion training apparatus effectively eliminating the occurrence of a risk of falling down and attaining a smooth swinging effect by a pivot design of a swing rod. <P>SOLUTION: This putting motion training apparatus is provided with an inverse-U shaped fixed frame and a swing rod pivotally mounted to the fixed frame and being swingable in the left/right, a stretch rod is connected to the lower end of the swing rod, a plurality of types and forms of clamping means can be connected to the stretch rod, and the plurality of types of clamping means are served to clamp the putter and served that a user trains the swinging motion of the putter and has safety being stable and hard to fall down. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a golf putt practice mechanism, and more particularly to a put swing motion training apparatus that can be firmly laid on the ground and is less likely to cause danger by tilting.

  FIG. 1 shows a golf putting motion training device described in Patent Document 1. It comprises a block-like base 10 ′ placed on the ground, a frame rod 21 ′ is erected in front of the base 10 ′, an insertion part 221 ′ is connected to the upper part of the frame rod 21 ′, and the insertion part 221 ′ is stretched and bent toward one side to provide a U-shaped bent portion 222 ′, and a rectangular first rod 30 ′ is screwed to the front side of the bent portion 222 ′, and the first rod 30 ′. A second rod 40 ′ is further connected to the lower end of the second rod 40, and a clamping device 3 ′ is pivotally mounted below the second rod 40 ′. The clamping device 3 ′ clamps the putter B. Since this frame rod 21 'is erected at the front end of the base 10', the front end of the frame rod 21 'protrudes forward of the base 10', and the first rod 30 'and the second rod 40' are hung. From this, it can be imagined that the center of gravity of the base 10 'is always in front of the base 10', and if the frame rod 21 'is moved to the center of the base 10', the putter head is in front of the base 10 '. It collides with the wall. In order to prevent the golf putting motion training apparatus from tilting forward in this manner, the trader increases the weight of the base 10 'to balance the gravity before and after the putting motion training apparatus. However, if you have a small child at home, it is quite dangerous. That is, when the clamping device 3 'is pulled downward or subjected to a collision in the opposite direction with respect to the base 10', the base 10 'tilts very easily forward, and the base 10' originally has a balance of gravity before and after it. This is because the weight of the base 10 ′ main body is increased in order to eliminate the risk of crushing the child. Therefore, it is dangerous for use.

  In addition, both proposals of Patent Documents 2 and 3 have the same defects as the structure of FIG.

  In view of this, the present invention provides a putting motion training device that solves the above-mentioned drawbacks of the prior art.

Taiwan Patent Application No. 90221975 US Pat. No. 6,672,974 B1 US Pat. No. 6,595,865B2

  The present invention provides a putting motion training device that can effectively isolate the occurrence of the danger of tilting and can achieve a smooth swing effect by the pivot attachment design of the swing rod.

  In order to achieve this design goal, the present invention is achieved in particular by the following structure. That is, the present invention includes an inverted U-shaped fixed frame, a swing rod swingable to the left and right is pivotally attached to the fixed frame, and an extension rod can be connected to the lower end of the swing rod. The clamping means can be connected and the putter can be clamped, and the design of the fixed frame prevents the center of gravity from being biased outward and tilting.

The invention of claim 1 is a pad motion training apparatus,
Upright pipes are provided at intervals on the left and right, the bottom of each upright pipe is erected on the base, and a fixed frame with a suspension bar connected to the top of the two upright pipes;
Pivoting means passed through the suspension bar and assembled to the suspension bar;
A swing rod whose head is pivotally mounted on the pivoting means and can swing left and right;
A clamping means connected to the swing rod, a clamp capable of clamping the putter is attached to the free end thereof, and the center of gravity of the suspended putter is placed in the two bases peacefully through the suspension rod;
It is a putting motion training device characterized by comprising.
According to a second aspect of the present invention, in the putting motion training apparatus according to the first aspect, a swing rod is joined to the pivot attachment means, and a bearing is provided at the center of the head of the swing rod in the pivot attachment means. The head is pivotally installed in the pivot means, and a sphere is assembled in an annular shape between the swing rod head and the joint surface of the pivot means, and the swing rod is the center bearing, the rear wall sphere, and the front wall. The pat motion training apparatus is characterized in that it is pivotally installed in the pivoting means by three pivotal structures of spheres.
According to a third aspect of the present invention, in the putting motion training apparatus according to the second aspect, the pivoting means is formed by joining two clamping plates, a rotation hole is provided at the center of the swing rod head, and the bearing is in the shaft hole. The convex hole provided in the first clamping plate is inserted and positioned, and the end surface of the convex column is brought into contact with the inner wall surface of the second clamping plate, and is connected to the bearing inner hole. The means penetrates the convex column, joins the two clamping plates, and is provided to pivot the head of the swing rod between the two clamping plates. The concave holes are spaced apart, the spheres are accommodated inside the respective concave holes, an annular groove corresponding to the spheres is provided in the head of the swing rod, and the inner surface of the second clamping plate also has an annular groove centered on the convex column. Provided at the position corresponding to the annular groove of the second clamping plate on the front surface of the swing rod head A plurality of concavities are spaced apart, each recessed hole, characterized in that the sphere is embedded between the annular groove, and the pad work training device.
According to a fourth aspect of the present invention, in the putting motion training apparatus according to the first aspect, the fixed frame includes an upright pipe installed upright on the two bases, and a suspension bar is connected to the upper part of the two upright pipes. The pad motion training device is characterized by constituting an inverted U-shaped frame.
According to a fifth aspect of the present invention, in the putting motion training apparatus according to the fourth aspect, the telescopic rods are respectively inserted above the two upright pipes of the fixed frame, and the joint portions of the telescopic rods and the upright pipes are screwed sideways. A fitting tube fixed by the tightening means and facing the upper part of the two telescopic rods is provided, and the two ends of the suspension rod are inserted into the two fitting tubes, and another tightening means has a diameter from the outside of the fitting tube. The putting motion training device is characterized in that the hanging rod is fixed by being screwed in the direction, and the opposite inner sides of the two bases are connected by a connecting rod.
According to a sixth aspect of the present invention, in the putt motion training apparatus according to the first aspect, a T-shaped groove is provided in a vertical direction at the lower stage of the swing rod, and the extending rod is inserted into the T-shaped groove of the swing rod. The extending rod is provided with a concave and convex corrugated engaging groove that extends in the vertical direction. This engaging groove corresponds to the engaging unit inside the swing rod, and the engaging unit has a screw tube on the rear surface of the swing rod. An elastic body and a bead urged to the elastic body, the bead is locked in the locking groove, the elastic body is pressed by a bolt, and the bolt is screwed into the screw tube,
A tube hole is provided in the front-rear direction of the bottom end in the T-shaped groove of the swing rod. The tube hole is provided for passage of the bolt, and the bolt is screwed with the nut, and is long at a position corresponding to the nut of the extending rod. A through-hole is provided, and this through-hole is used for the passage of a bolt and screwing with a nut, whereby the stretching rod is fixed to the swing rod.

  The pad motion training apparatus of the present invention includes an inverted U-shaped fixed frame, a swing rod pivoted on the fixed frame and capable of swinging left and right, and an extension rod connected to the lower end of the swing rod. A plurality of types of clamping means can be connected to each other, and the plurality of types of clamping means are used for holding the putter, and the user is used for training the swing motion of the putter, so that it is stable and difficult to tilt. It has safety.

  As shown in FIG. 2, the putting motion training apparatus of the present invention includes a fixed frame 10, two upright tubes 20, a pivoting means 3, a swing rod 40, a stretching rod 50, a clamping means 60, and a clamp 70. .

  The fixed frame 10 is a substantially inverted U-shaped frame, and bases 11 are provided on the left and right sides of the bottom, and through grooves 12 communicating upward from the bottom end are provided at positions corresponding to the two bases 11. An insertion hole 13 that is not penetrated downward from the upper end is provided at a rear position corresponding to each other of the two bases 11, and a stopper 131 protrudes from the inner wall of the insertion hole 13. The fitting tube 14 is provided at a position corresponding to each of the two, the connecting rod 15 is jointly passed between the two fitting tubes 14, and the two bases 11 are connected by the connecting rod 15 fixed by the pin 16. The two bases 11 do not wobble when receiving an acting force.

  The two upright tubes 20 have a hollow shape, the bottoms thereof are inserted into the insertion holes 13 on the top of the base 11, and the bolts 21 that are inserted upward from the base 11 are provided in the bottoms of the upright tubes 20. The two upright pipes 20 are erected on the corresponding bases 11 by being screwed into 22, and a downward locking groove 24 is provided below the upright pipes 20 to be combined with the stopper 131 of the base 11, thereby The upright pipe 20 is prevented from rotating. A hollow telescopic rod 23 is fitted above the upright pipe 20, and a radial wall hole 25 is provided at a position where the upper telescopic rod 23 above the upright pipe 20 penetrates. For example, the end of the tensioning means 26 can be connected to or separated from the telescopic rod 23. After the telescopic rod 23 is adjusted to an appropriate height, the telescopic rod 23 is fixed to the upright pipe 20. After that, fitting pipes 232 having openings opposite to each other are provided on the upper portions of the two telescopic rods 23, a horizontal suspension rod 27 is inserted into the two fitting pipes 232, and the outer wall of the fitting pipe 232 is radially arranged. Another tightening means 233 (for example, a bolt) is screwed, and the end of the tightening means 233 can be pressed against the peripheral wall of the suspension rod 27, whereby the suspension rod 27 is fixed to the two telescopic rods 23.

  As shown in FIGS. 2 and 3, the pivoting means 3 is formed by abutting two clamping plates 30 and 300, and these two clamping plates 30 and 300 are laterally distributed equally to the upper butted surfaces. A pivot hole 31 is provided. The pivot hole 31 clamps the suspension rod 27, and three fixing means 32 (for example, bolts) are arranged in the radial direction at the corresponding positions of the two sandwich plates 30, 300 and the suspension rod 27. The fixing means 32 penetrates the suspension rod 27 directly and is fixed by a nut 320, whereby the two clamping plates 30 and 300 and the suspension rod 27 are fixed integrally. A fisheye hole 33 is provided in the center of the back surface of the first clamping plate 30, and a plurality of concave holes 34 are arranged in a ring shape around the fisheye hole 33 on the front surface of the first clamping plate 30. A spherical body 340 (for example, a bead) is disposed inside the concave hole 34, and a convex column 330 is disposed along the position of the fisheye hole 33 on the front surface of the first sandwiching plate 30, and the convex column of the first sandwiching plate 30. 330 and the inner wall surface of the clamping plate 300 are in contact with each other, and a fixed gap is held between the two clamping plates 30 and 300. This gap is slightly larger than the thickness of the swing rod 40 described below. A hexagonal retraction hole 35 is provided at a position corresponding to the fisheye hole 33 of the plate 300, and an annular groove 36 is provided on the inner surface of the second holding plate 300 around the perforation 35.

  The swing rod 40 has a flat rod shape, and its thickness is slightly smaller than the fixed gap of the combination of the two sandwiching plates 30 and 300. The swing rod 40 has a circular head 41 at the upper part thereof, and a rotation hole at the center of the head 41. 411 is provided, the bearing 42 is fitted into the rotation hole 411, the convex column 330 of the first clamping plate 30 is inserted into the inner hole of the bearing 42, and the rotation hole 411 is formed on the rear surface of the head 41. An annular groove 412 is provided at a position corresponding to the sphere 340 of the first clamping plate 30 as the center. In addition, a plurality of concave holes 413 are spaced from each other at positions corresponding to the annular grooves 36 of the second sandwiching plate 300 on the front surface of the head 41, and a sphere 414 (for example, a bead) is provided between each concave hole 413 and the annular grooves 36. ), And then the connecting means 415 (for example, a screw) is inserted into the fisheye hole 33 of the first clamping plate 30 and further placed in the bore 35 with the nut 416 so that the swing rod 40 is pivotally attached. 3, and the swing rod 40 is pivotally attached to the pivot means 3 by three pivotal structures of a center bearing 42, a rear wall sphere 340, and a front wall sphere 414. Thus, a smooth swing rotation action can be obtained. As shown in FIGS. 2 and 4, a T-shaped groove 43 is provided vertically in the lower stage of the swing rod 40, and a tube hole 44 is provided in the front-rear direction of the bottom end in the T-shaped groove 43 of the swing rod 40. The tube hole 44 is used for the passage of the bolt 45 and the bolt 45 is screwed to the nut 53 to be used for fixing the extending rod 50 described later, and is separately locked to the swing rod 40 on the left and right sides of the bottom of the T-shaped groove 43. A unit 46 is provided. A bolt 463 is screwed into a screw tube 461 penetrating in the front-rear direction of the locking unit 46, and an elastic body 464 (for example, a spring) and a bead 465 are provided inside the screw tube 461.

  The extending rod 50 has a T-shaped cross section, is inserted and joined from the bottom end of the T-shaped groove 43, and a concave and convex corrugated locking groove 51 is provided at a longitudinal position corresponding to the bead 465 of the extending rod 50, As shown in FIG. 2 and FIG. 4, the fixed point slide in the T-shaped groove 43 of the swing rod 40 of the extending rod 50 is point-controlled. The elongated rod 50 is provided with a long hole 52 penetrating at a position corresponding to the bolt 45. The long hole 52 is provided for passage from the back of the bolt 45, and the bolt 45 is screwed into the nut 53 on the front. The length of the stretching rod 50 protruding from the swing rod 40 can be adjusted according to the height of the individual by connecting the stretching rod 50 with the swing rod 40 and tightening the nut 53, and below the stretching rod 50. A fitting portion 54 having a downward opening is provided, and a perforation 55 passes through the top and bottom of each fitting portion 54, and a plurality of holding holes 56 are distributed in the vertical direction on both the left and right sides of the stretching rod 50.

  As shown in FIGS. 2 and 4, the clamping means 60 is a substantially L-shaped rod, an upper portion 61 of which is fitted in the fitting portion 54, and two through holes 62 are perforations 55 of the fitting portion 54. Are connected by connecting means 63 (for example, bolts) and fixed by a nut 630 at the other end, the clamping means 60 is fixed to the lower end of the extending rod 50, and a clamp 70 is attached to the other end of the clamping means 60. Is attached.

  As shown in FIGS. 2 and 5, the clamp 70 is composed of a fixed block 71 and a movable block 72, and the fixed block 71 is attached to the clamping means 60, and a pivot hole 73 is installed vertically on one side of the fixed block 71. The pivot hole 73 is joined to the pivot 74 of the movable block 72, and the movable block 72 can be separated from and joined to the fixed block 71 around the pivot hole 73 and the pivot 74. The fixing groove 75 is provided with a bolt 76 passing through the fixing block 71 and the clamping means 60, the bolt 76 is fixed with a nut 760, and the clamp 70 is fixed to the clamping means 60. In addition, it is possible to loosen or fasten the movable block 72 and achieve a longitudinally long holding groove between the joint surfaces of the fixed block 71 and the movable block 72. 7 is provided, as well as clamping hole 78 in the outer end of the clamping groove 77 is provided is provided in the insertion and the clamping fixation of the putter a.

  In use, in the first type of situation, a person stands in the rear position of the pad movement training device, and as shown in FIGS. 2, 6 and 7, depending on the height of the practitioner's body, The protruding length of the telescopic rod 23 is adjusted. At this time, the tightening means 26 outside the two upright tubes 20 are loosened, the ends thereof are separated from the outer wall of the telescopic rod 23, the heights of the two telescopic rods 23 are adjusted, and the two tightening means 26 are tightened again. For example, the suspension rod 27 can be adjusted to the height of the practitioner. Next, the inclination of the swing rod 40 is adjusted according to the forward angle of the practitioner's body. That is, if the two tensioning means 233 at the upper part of the two telescopic rods 23 are loosened, the suspension rod 27 is turned to an appropriate angle, and the tensioning means 233 is further tightened, the swing rod 40 is tilted forward by bending the waist of the human body. It can be adjusted according to the angle.

  Subsequently, as shown in FIGS. 2, 4, 6, and 7, if it is necessary to finely adjust the height of the clamp 70, first, the nut 53 in front of the swing rod 40 is loosened, and the extension rod 50 is pushed up or pulled down. . At this time, the extending rod 50 can achieve a multi-stage fine adjustment positioning function by the elastic locking relationship between the locking grooves 51 distributed on the left and right sides and the beads 465 of the locking unit 46 of the swing rod 40. The nut 53 may be tightened after adjusting to a proper position. At this time, the grip a1 of the putter a can be grasped, and the put swing practice can be performed by the bearing 42 in the combination of the pivoting means 3 and the swing rod 40, the sphere 414 on the front wall, and the sphere 340 on the rear wall.

  FIGS. 2 and 8 show another embodiment of the clamping means 60 of the present invention, which corresponds to the second type of practice situation of the present invention and allows the practitioner to practice while standing on the front side of the base 11. . 6 may be replaced with the holding means 60 shown in FIG. 8 after the holding means 60 shown in FIG. 6 is removed. The holding means 60 is formed into a rod frame which is bent forward and further extended upward. 61 is inserted into the two fitting portions 54 and has two holes (not shown) and is connected to the perforations 55 of the fitting portion 54 by connecting means 63 (for example, bolts) and nuts 630. The clamping means 60 is joined to the lower end of the stretching rod 50, and the other end of the clamping means 60 is connected to a clamp 70. The clamp 70 is used to insert and put the putter a diagonally, thus fixing it. You can put the practitioner on the front side and practice swinging the putter.

  In addition, as shown in FIG. 9, the practitioner can assist the posture of performing the putting motion with both hands by using the clamping means of the triangular frame 80. That is, the clamping means 60 shown in FIG. 2 is removed, and a clamping insertion column (not shown) provided on the bottom two sides of the triangular frame 80 is recessed below the front two sides of the stretching rod 50. If it inserts in 56 and positions it, a practitioner can be made to practice swing by pinching | interposing an arm with the clamping ring 81 of the both sides of the triangular frame 80. FIG.

  Overall, the center of gravity when the hanging rod 27 of the present invention hangs the putter a hangs between the left and right upright pipes 20 of the fixed frame 10, and the two upright pipes 20 are erected on the two bases 11. Therefore, the center of gravity of the suspended putter a is stably in the two bases 11 using either the clamping means 60 shown in FIG. 6 or the clamping means 60 shown in FIG. The occurrence of the risk of forward tilt or rear / back elevation of the structure is provided, and the through groove 12 at the bottom of the base 11 serves as a space for pushing out the ball. Importantly, the swing rod 40 of the present invention is not only swingable to the left and right by the bearing 42, but also the sphere 340 and the sphere 414 are combined as an interface between the swing rod 40 and the two clamping plates 30 and 300. Therefore, the smoothness of the swing can be greatly increased, the stability of the two right and left upright pipes 20 is increased, and the connecting base 15 is caulked and joined between the two bases 11 in the lateral direction. Thus, there is no drawback of easily tilting and causing an accident as in the known technology as shown in FIG. Such structural features are not found in such existing structures and are unique to the present invention, and therefore the present invention has the advantages described above. However, the above embodiments do not limit the scope of the present invention, and any equivalent changes and modifications that can be made based on the description of the scope of the claims of the present invention shall fall within the scope of the claims of the present invention. To do.

It is a side view of patent documents 1. It is a three-dimensional exploded view of the Example of this invention. It is a fragmentary sectional view of the pivot attachment means and swing rod of the present invention. It is a fragmentary sectional view of the swing rod and extending | stretching rod of this invention. It is an enlarged view of the clamp of this invention. It is an Example display figure of this invention. FIG. 7 is a side view of FIG. 6. It is another Example display figure of this invention. It is an example display figure which applied the triangular frame of the present invention.

Explanation of symbols

10 'base 21' frame rod 221 'insertion portion 222' bent portion 30 'first rod 40' second rod 3 'clamping device B putter 10 fixed frame 11 base 12 through groove 13 insertion hole 131 stopper 14 fitting tube 15 articulation Rod 16 Pin 20 Upright tube 21 Bolt 22 Screw hole 23 Telescopic rod 232 Fitting tube 233 Tightening means 24 Locking groove 25 Wall hole 26 Tightening means 27 Hanging rod 3 Pivoting means 30, 300 Pinch plate 31 Pivoting hole 32 Fixing means 33 Fisheye hole 330 Convex column 320 Nut 34 Recessed hole 340 Sphere 35 Punch 36 Annular groove 40 Swing rod 41 Head 411 Rotating hole 412 Annular groove 413 Recessed hole 414 Sphere 415 Connecting means 416 Nut 42 Bearing 43 T-shaped groove 44 Tube hole 45 Bolt 46 Locking unit 461 Screw tube 463 Bolt 464 Elastic body 465 Bead 5 DESCRIPTION OF SYMBOLS 0 Extension rod 51 Locking groove 52 Through-hole 53 Nut 54 Fitting part 55 Drilling 56 Clamping hole 60 Clamping means 61 Upper part 62 Hole 63 Connection means 630 Nut 71 Fixed block 72 Movable block 73 Pivoting hole 74 Axis 75 Fixing groove 76 Bolt 760 Nut 77 Clamping groove 78 Clamping hole 80 Triangle frame 81 Clamping ring a Putter a1 Grip

Claims (6)

In the pad movement training device,
Upright pipes are provided at intervals on the left and right, the bottom of each upright pipe is erected on the base, and a fixed frame with a suspension bar connected to the top of the two upright pipes;
Pivoting means passed through the suspension bar and assembled to the suspension bar;
A swing rod whose head is pivotally mounted on the pivoting means and can swing left and right;
A clamping means connected to the swing rod, a clamp capable of clamping the putter is attached to the free end thereof, and the center of gravity of the suspended putter is placed in the two bases peacefully through the suspension rod;
A pad motion training device characterized by comprising:   2. The putting motion training apparatus according to claim 1, wherein a swing rod is joined in the pivot attachment means, a bearing is provided at the center of the swing rod head in the pivot attachment means, and the swing rod head is pivotally attached. The sphere is assembled in an annular shape between the head of the swing rod and the joint surface of the pivot attachment means, and the three pivots of the bearing, the sphere on the rear wall, and the sphere on the front wall are assembled. A pad motion training device characterized in that the pad motion training device is pivotally installed in the pivot attachment means.   3. The putting motion training apparatus according to claim 2, wherein the pivoting means is formed by joining two clamping plates, a rotation hole is provided at the center of the swing rod head, and a bearing is fitted in the shaft hole. A convex column provided in the first clamping plate is inserted and positioned, the end surface of the convex column is in contact with the inner wall surface of the second clamping plate, and the connecting means penetrates the convex column. The two clamping plates are joined together, and the head of the swing rod is pivoted between the two clamping plates, and a plurality of concave holes are spaced apart from each other around the convex column on the front surface of the first clamping plate, A spherical body is accommodated in each concave hole, an annular groove corresponding to the spherical body is provided in the head of the swing rod, and an annular groove is provided on the inner surface of the second clamping plate around the convex column. A plurality of recessed holes are annularly spaced at positions corresponding to the annular grooves of the second clamping plate on the front surface of the part It is location, characterized in that each recessed hole, spheres between the annular groove is embedded, Pat operation training devices.   2. The pad motion training apparatus according to claim 1, wherein the fixed frame includes an upright pipe installed upright on two bases, and a suspension bar is connected to the upper part of the two upright pipes to form an inverted U-shaped frame. A pad motion training device characterized by the above.   5. The pad motion training apparatus according to claim 4, wherein an extension rod is inserted above each of the two upright pipes of the fixed frame, and a joining portion of the extension rod and the upright pipe is fixed by an elastic means screwed sideways. A fitting tube is provided opposite to the upper part of the two telescopic rods. Two ends of the suspension rod are inserted into these two fitting tubes, and another tensioning means is screwed in the radial direction from the outside of the fitting tube, and the suspension rod The pad motion training device is characterized in that is fixed and the opposing insides of the two bases are connected by a connecting rod. 2. The putting motion training apparatus according to claim 1, wherein a T-shaped groove is provided in a vertical direction at a lower stage of the swing rod, and the extending rod is inserted into the T-shaped groove of the swing rod and is continuously connected in the vertical direction to the extended rod. There is a concave and convex corrugated locking groove that corresponds to the locking unit inside the swing rod, and the locking unit has a threaded tube on the rear surface of the swing rod, and an elastic body inside the screw tube and biasing it The bead is locked in the locking groove, the elastic body is pressed against the bolt, the bolt is screwed into the screw tube,
A tube hole is provided in the front-rear direction of the bottom end in the T-shaped groove of the swing rod. The tube hole is provided for passage of the bolt, and the bolt is screwed with the nut, and is long at a position corresponding to the nut of the extending rod. A putting motion training device, wherein a through hole is provided, and the through hole is used for passing a bolt and screwing with a nut, whereby the extending rod is fixed to the swing rod.

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