Liftable high-strength sports parallel bar equipment

Abstract

The invention belongs to the technical field of fitness equipment, and discloses a liftable high-strength sports parallel bar device which comprises a base and further comprises a triangular frame, the triangular frame is fixedly connected to the outer wall of the top end of the base, and a cross beam is arranged on the outer wall of the triangular frame through a fixing mechanism; the check blocks are fixedly connected to the outer wall of the cross beam, a motor is fixedly connected to the inner wall of each check block, a rotating rod is fixedly connected to an output shaft of each motor, a noose disc is arranged on the outer wall of each rotating rod through a transmission module, a noose is wound around the outer wall of each noose disc, and a barbell is fixedly connected to the outer wall of each noose. The outer wall of the base is fixedly connected with a control switch; through cooperation of the motor, the noose and other structures, a user can control the motor to be started by stepping on the control switch, the height of the barbell can be conveniently and rapidly adjusted according to the requirement of the user, the user can be protected, and the situation that the barbell is pressed on the body due to exhaustion, and self rescue cannot be achieved is avoided.

Description

Technical Field

[0001] The invention belongs to the technical field of fitness equipment, in particular to a high-intensity exercise parallel bar equipment that can be raised or lowered. Background Art

[0002] The barbell bench press fitness equipment is a comprehensive training device that uses a barbell as the core weight-bearing equipment, combined with a bench press bench and a protective frame. The user lies on the bench press bench, holds the barbell with both hands, and uses the coordinated force of the chest muscles, triceps, shoulders and other muscle groups to complete the push and lowering of the barbell. It is suitable for strengthening upper limb strength, shaping chest muscle lines and improving core stability.

[0003] In some existing technologies, when performing bench press exercises, the user needs to lie on the bench press bench, and an assistant takes the barbell and places it above the user's chest to perform bench press. The assistant needs to accompany the user throughout the exercise to avoid accidents, and the assistant also needs to take the barbell and place it on the ground after the exercise. It is inconvenient for the user to operate when exercising alone. If the barbell is heavy, it is not convenient for the user to take it to the chest when lying flat. In addition, if exhaustion or other accidents occur during the bench press, the barbell may directly press on the body. If there is no assistant nearby, it may cause injuries and other risks. Therefore, a liftable high-intensity exercise parallel bar equipment is proposed to address the above problems. Summary of the Invention

[0004] In order to solve the problems raised in the above background technology, the present invention provides a high-intensity exercise parallel bar equipment that can be raised and lowered.

[0005] To achieve the above-mentioned object, the present invention provides the following technical solution: a liftable high-intensity exercise parallel bar equipment, comprising a base, and further comprising: a tripod, the tripod being fixedly connected to the top outer wall of the base, the outer wall of the tripod being provided with a crossbeam through a fixing mechanism; a stopper, the stopper being fixedly connected to the outer wall of the crossbeam, the inner wall of the stopper being fixedly connected to a motor, the output shaft of the motor being fixedly connected to a rotating rod, the outer wall of the rotating rod being provided with a winch disc through a transmission module, the outer wall of the winch disc being wound with a noose, the outer wall of the noose being fixedly connected to a barbell, and the outer wall of the base being fixedly connected to a control switch; a stabilizing mechanism, the stabilizing mechanism being provided on the outer wall of the base;

[0006] Wherein, the fixing mechanism includes a fixing block, and a mounting block is detachably mounted on the outer wall of the fixing block by bolts; the stabilizing mechanism includes a support rod, and a hinge rod is hinged on the outer wall of the support rod.

[0007] Preferably, the rotating rod is rotatably connected to the inner wall of the stopper, the rotating rod is transmission-connected to the winch disc through a transmission module, and the winch disc is rotatably connected to the outer wall of the beam.

[0008] Preferably, the inner wall of the mounting block is elastically connected to a trapezoidal block through a return spring, the outer wall of the trapezoidal block is fixedly connected to an extrusion block, the inner wall of the mounting block is slidably connected to a connecting rod, the outer wall of the connecting rod is fixedly connected to an insert block, the outer wall of the beam is fixedly connected to a square block, and the outer wall of the square block is provided with a groove.

[0009] Preferably, one end of the return spring is fixedly connected to the outer wall of the trapezoidal block, and the other end of the return spring is fixedly connected to the inner wall of the mounting block, and the trapezoidal block is slidably connected in the inner wall of the mounting block.

[0010] Preferably, the extrusion block passes through the outer wall of the installation block, the extrusion block contacts the outer wall of the square block, and the installation block and the fixing block both contact the outer wall of the square block.

[0011] Preferably, the connecting rod is slidably connected to the outer wall of the trapezoidal block, and the insert block is slidably connected to the inner wall of the mounting block.

[0012] Preferably, the outer wall of the base is fixedly connected to a connecting block, the outer wall of the base is fixedly connected to a fixed plate, the outer wall of the fixed plate is slidably connected to a moving block, the inner wall of the moving block is elastically connected to an insert rod through an elastic member, and a circular groove is provided on the outer wall of the fixed plate.

[0013] Preferably, the support rod is hinged to the outer wall of the connecting block, and the hinge rod is hinged to the outer wall of the moving block.

[0014] Preferably, one end of the elastic member is fixedly connected to the outer wall of the insertion rod, and the other end of the elastic member is fixedly connected to the inner wall of the moving block.

[0015] Preferably, the insertion rod is slidably connected to the inner wall of the moving block, and the insertion rod is engaged with the circular groove.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] The present invention cooperates with a motor and a noose, and the user can control the motor to start by stepping on a control switch, and the noose disk is driven to rotate through a rotating rod and a transmission module, thereby retracting and releasing the noose, and driving the barbell to move up and down. The height of the barbell can be adjusted conveniently and quickly according to the user's needs, and the user can also be protected from exhaustion and being unable to save himself due to the barbell pressing on his body.

[0018] The present invention provides a structure of a mounting block and an extrusion block. After the square block is placed in the fixing block, the mounting block can be covered on the square block and fixed to the fixing block by bolts and nuts. At this time, the outer wall of the square block will squeeze the extrusion block, and the trapezoidal block drives the two groups of insertion blocks to move toward the middle and insert them into the inner wall of the groove, thereby completing the horizontal fixation of the beam. The fixing effect of the beam can be improved without additional operation.

[0019] The present invention cooperates with structures such as a moving block and a support rod. After the base is installed, the insertion rod can be pulled to move the moving block downward, and the hinged rod and the support rod can be flipped to unfold the stabilizing mechanism. The support rod contacts the ground, which can increase the lateral supporting force of the base and the tripod, thereby further improving the overall stability of the device. In addition, during the transportation of the device, the stabilizing mechanism can be folded up to reduce the occupied space and facilitate transportation. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the main structure of the present invention;

[0021] Figure 2 Schematic diagram of the cross-sectional structure of the stopper of the present invention;

[0022] Figure 3 This is a schematic diagram of the exploded structure of the block section, fixing mechanism, and crossbeam of the present invention;

[0023] Figure 4 This is a cross-section of the mounting block and a schematic diagram of the exploded structure of the tripod of the present invention;

[0024] Figure 5 For the present invention Figure 4 A schematic diagram of the enlarged structure of part A;

[0025] Figure 6 This is a cross-section of the movable block and a schematic diagram of the exploded structure of the base of the present invention.

[0026] In the figure: 1. Base; 2. Tripod; 3. Fixing mechanism; 31. Fixing block; 32. Mounting block; 33. Square block; 34. Groove; 35. Return spring; 36. Trapezoidal block; 37. Extrusion block; 38. Connecting rod; 39. Insert block; 4. Stabilizing mechanism; 41. Connecting block; 42. Support rod; 43. Articulated rod; 44. Moving block; 45. Elastic member; 46. Insert rod; 47. Fixing plate; 48. Circular groove; 5. Crossbeam; 6. Stop block; 7. Noose; 8. Barbell; 9. Control switch; 10. Motor; 11. Transmission module; 12. Turning rod; 13. Noose disc. DETAILED DESCRIPTION

[0027] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0028] like Figures 1 to 6 As shown, the present invention provides a liftable high-intensity parallel bar exercise equipment, including a base 1, and further comprising: a tripod 2, the tripod 2 is fixedly connected to the top outer wall of the base 1, and the outer wall of the tripod 2 is provided with a crossbeam 5 through a fixing mechanism 3; a stopper 6, the stopper 6 is fixedly connected to the outer wall of the crossbeam 5, the inner wall of the stopper 6 is fixedly connected to a motor 10, the output shaft of the motor 10 is fixedly connected to a rotating rod 12, the outer wall of the rotating rod 12 is provided with a winch disc 13 through a transmission module 11, the outer wall of the winch disc 13 is wound with a winch 7, the outer wall of the winch 7 is fixedly connected to a barbell 8, and the outer wall of the base 1 is fixedly connected to a control switch 9; a stabilizing mechanism 4, the stabilizing mechanism 4 is provided on the outer wall of the base 1;

[0029] The fixing mechanism 3 includes a fixing block 31 , and a mounting block 32 is detachably mounted on the outer wall of the fixing block 31 via bolts; the stabilizing mechanism 4 includes a support rod 42 , and a hinge rod 43 is hinged on the outer wall of the support rod 42 .

[0030] The above scheme is adopted: the base 1 is spliced ​​by four groups of steel structures, the base 1 and the tripod 2 are both split, and the connections are detachable to facilitate its transportation, so as to avoid the inability to enter the door or elevator of the place of use due to the overall size after assembly; the barbell 8 is hung on the winch disc 13 on the beam 5 through the noose 7, and the beam 5 must be able to withstand a load of more than 300 kg to meet safety standards; the noose 7 should be made of soft steel wire. In addition to its own gravity, the hard steel wire will generate a reaction force when the user pushes up the barbell, affecting the normal performance of the athlete, and the connection between the noose 7 and the barbell 8 is located on the inside of the barbell 8 clamp to avoid blocking the addition and subtraction of the barbell plates; the motor 10 is electrically connected to the control switch 9, and the control switch 9 is installed near the user's feet so that the user can step on the motor 10 to start the motor to lift the barbell 8, thereby protecting the user.

[0031] like Figures 1 to 3 As shown, the rotating rod 12 is rotatably connected to the inner wall of the stopper 6 , and the rotating rod 12 is transmission-connected to the winch disc 13 through the transmission module 11 , and the winch disc 13 is rotatably connected to the outer wall of the beam 5 .

[0032] The above scheme is adopted: the transmission module 11 includes two groups of sprockets with different diameters, and the two groups of sprockets are respectively fixed on the outer walls of the rotating rod 12 and the winch disk 13. The two groups of sprockets are connected by chain transmission. When the motor 10 starts to drive the rotating rod 12 to rotate, the rotating rod 12 drives one group of sprockets to rotate, and the chain transmission drives the other group of sprockets to rotate the winch disk 13, so that the noose 7 can be wound up or lowered, driving the barbell 8 to move up and down.

[0033] like Figures 3 to 5 As shown, the inner wall of the mounting block 32 is elastically connected to the trapezoidal block 36 through the return spring 35, the outer wall of the trapezoidal block 36 is fixedly connected to the extrusion block 37, the inner wall of the mounting block 32 is slidably connected to the connecting rod 38, the outer wall of the connecting rod 38 is fixedly connected to the insertion block 39, the outer wall of the crossbeam 5 is fixedly connected to the square block 33, and the outer wall of the square block 33 is provided with a groove 34.

[0034] The above scheme is adopted: the square blocks 33 on both sides of the crossbeam 5 can be installed between the fixed block 31 and the mounting block 32, and the fixed block 31 and the mounting block 32 limit the square block 33 from the upper and lower directions, and the two are fixed by bolts to complete the installation of the crossbeam 5; during the installation process, the square block 33 can contact and squeeze the extrusion block 37 to drive the insert block 39 in the fixed block 31 and the mounting block 32 to be inserted into the groove 34, and the square block 33, the fixed block 31 and the mounting block 32 are further fixed to prevent the crossbeam 5 from moving laterally; the fixed block 31 and the mounting block 32 are both provided with a return spring 35, a trapezoidal block 36, an extrusion block 37, a connecting rod 38 and an insert block 39, and the groove 34 is opened on the upper and lower outer walls of the square block 33, with a total of four groups, and the groove 34 is provided with an inclined section and a straight section. After the fixed block 31, the mounting block 32 and the square block 33 are installed, the insert block 39 is engaged with the straight section of the groove 34 to fix the three.

[0035] like Figures 3 to 5 As shown, one end of the return spring 35 is fixedly connected to the outer wall of the trapezoidal block 36, and the other end of the return spring 35 is fixedly connected to the inner wall of the mounting block 32, and the trapezoidal block 36 is slidably connected to the inner wall of the mounting block 32; the extrusion block 37 passes through the outer wall of the mounting block 32, and the extrusion block 37 contacts the outer wall of the square block 33, and the mounting block 32 and the fixed block 31 both contact the outer wall of the square block 33; the connecting rod 38 is slidably connected to the outer wall of the trapezoidal block 36, and the insert block 39 is slidably connected to the inner wall of the mounting block 32.

[0036] Adopting the above solution: Under normal conditions, the return spring 35 keeps the trapezoidal block 36 in a certain position due to its own elastic force. At this time, the extrusion block 37 protrudes from the outer wall of the fixed block 31 and the mounting block 32. Figure 5As shown, the connecting rod 38 contacts the long side inclined surface of the trapezoidal block 36, so that the insert block 39 is located in the inner wall of the fixed block 31 and the mounting block 32; when installing the crossbeam 5, the operator can first place the square block 33 in the fixed block 31, and the fixed block 31 is welded to the outer wall of the tripod 2. The square block 33 will squeeze the protruding extrusion block 37 in the fixed block 31, so that it moves toward the inner wall of the fixed block 31, driving the trapezoidal block 36 to move synchronously and compress the reset spring 35. When the trapezoidal block 36 moves, the inclined surfaces on both sides will drive the connecting rod 38 to move. Since the connecting rod 38 and the insert block 39 can only move horizontally, the insert block will be driven by the connecting rod 38. When moving, the insert block 39 first contacts the inclined section of the groove 34 and gradually moves into the straight section of the groove 34. At this time, the square block 33 is completely in contact with the inner wall of the fixing block 31, and the mounting block 32 can be covered on the square block 33 from above. The outer wall of the square block 33 further squeezes the extrusion block 37 in the inner wall of the mounting block 32, and the insert block 39 in the mounting block 32 is engaged with the straight section of the upper groove 34. When the mounting block 32 and the outer wall of the fixing block 31 are in contact, the two can be fixed by bolts and nuts to complete the installation of the beam 5, which not only fixes the beam 5 vertically, but also ensures its stability in the horizontal position.

[0037] like Figure 6 As shown, the outer wall of the base 1 is fixedly connected to a connecting block 41, the outer wall of the base 1 is fixedly connected to a fixed plate 47, the outer wall of the fixed plate 47 is slidably connected to a moving block 44, the inner wall of the moving block 44 is elastically connected to an insertion rod 46 through an elastic member 45, and the outer wall of the fixed plate 47 is provided with a circular groove 48.

[0038] By adopting the above scheme: the stabilizing mechanism 4 can assist in improving the supporting force of the base 1, and can disperse the stress generated on the base 1, thereby improving the structural strength of the overall support; the movable block 44 can move up and down on the outer wall of the fixed plate 47, and the stabilizing mechanism 4 can be folded or unfolded. When folded, it saves more space, and can be used for support when unfolded, and the operation is relatively convenient and quick; after unfolding the stabilizing mechanism 4, the movable block 44 is at the bottom, the support rod 42 will be in contact with the ground, and the hinged rod 43 provides support force to the support rod 42 from the inclined direction, thereby improving the overall stability; after folding, the support rod 42 and the hinged rod 43 are close to a vertical state, and the movable block 44 is at the top; the circular groove 48 is provided with two groups of upper and lower groups on the fixed plate 47, and the position of the movable block 44 can be fixed by connecting the inserted rod 46 with the circular groove 48.

[0039] like Figure 6 As shown, the support rod 42 is hinged to the outer wall of the connecting block 41, and the hinge rod 43 is hinged to the outer wall of the moving block 44; one end of the elastic member 45 is fixedly connected to the outer wall of the insertion rod 46, and the other end of the elastic member 45 is fixedly connected to the inner wall of the moving block 44; the insertion rod 46 is slidably connected to the inner wall of the moving block 44, and the insertion rod 46 is clamped in the circular groove 48.

[0040] The above scheme is adopted: the insertion rod 46 passes through the outer wall of the moving block 44. Under normal circumstances, the elastic member 45 can keep the insertion rod 46 in a state of being engaged with a group of circular grooves 48 due to its own elastic force, fixing the position of the moving block 44. When the insertion rod 46 is pulled outward, the elastic member 45 will be compressed, and the insertion rod 46 will be disengaged from the group of circular grooves 48. The position of the moving block 44 can be released to move it up and down. During the movement, the hinged rod 43 is flipped, driving the support rod 42 to flip up and down to unfold or fold it. After the support rod 42 is flipped to the appropriate position, the insertion rod 46 corresponds to the position of the circular groove 48. Under the elastic force of the elastic member 45, the insertion rod 46 moves and resets, and the state of the stabilizing mechanism 4 can be fixed.

[0041] The working principle and use process of the present invention:

[0042] The device is initially split. After being transported to the place of use, the four groups of steel structures of the split base 1 can be spliced ​​and fixed by bolts to ensure that the connections are firm. Then the tripod 2 can be installed on the top of the base 1 through a detachable connection method to complete the construction of the basic frame. Then, the square blocks 33 at both ends of the crossbeam 5 are aligned with the fixed blocks 31 on the tripod 2, and lowered so that the square blocks 33 squeeze the extrusion blocks 37 in the fixed blocks 31. After the extrusion blocks 37 are compressed, they drive the trapezoidal blocks 36 to compress the reset spring 35. The inclined surface of the trapezoidal block 36 drives the connecting rod 38 and the insert block 39 to move horizontally. The insert block 39 moves toward the middle and slides into the straight surface section along the inclined surface section of the groove 34 of the square block 33 to achieve preliminary clamping.

[0043] Next, the mounting block 32 covers the square block 33 from above, and the above-mentioned extrusion process is repeated so that the insert block 39 in the mounting block 32 is inserted into the straight section of the groove 34 above the square block 33. Bolts are passed through the fixing block 31 and the mounting block 32, and the two are fixed with nuts at the bottom to complete the installation of the crossbeam 5. The vertical and horizontal fixing effects are both good, and it can withstand a load of more than 300 kg, meeting safety standards.

[0044] Then pull the insertion rod 46 to compress the elastic member 45, so that the insertion rod 46 is disengaged from the circular groove 48 above the fixing plate 47, and the movable block 44 is moved downward. The movable block 44 drives the hinged rod 43 to flip, and pushes the support rod 42 to expand outward around the hinge point of the connecting block 41 to a horizontal state, and fits with the ground. When it reaches the predetermined position below, the insertion rod 46 is clamped into the circular groove 48 below under the action of the elastic member 45, fixing the support angle of the support rod 42 and the hinged rod 43, thereby enhancing the lateral support force and stability of the base 1.

[0045] The user can lie on his back on the bench press bench below the barbell, step on the control switch 9 to start the motor 10, and the rotating rod 12 drives the winch disc 13 to rotate through the transmission module 11, releasing the winch 7, and the barbell 8 slowly drops to a suitable position above the chest, and then the bench press operation can be performed; after completing the bench press action, step on the control switch 9 again, the motor 10 reverses, and the winch disc 13 rotates clockwise to rewind the winch 7, driving the barbell 8 to rise and reset; if exhaustion or abnormality occurs during training, the control switch 9 can be pressed to make the winch disc 13 drive the winch 7 to rewind, and move the barbell 8 upward to avoid danger caused by pressing on the user, thereby achieving a better protection effect.

[0046] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus.

[0047] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A high-intensity exercise parallel bar device that can be raised or lowered, comprising a base (1), characterized in that: Also includes: A tripod (2), the tripod (2) being fixedly connected to the top outer wall of the base (1), and the outer wall of the tripod (2) being provided with a crossbeam (5) via a fixing mechanism (3); A stopper (6), wherein the stopper (6) is fixedly connected to the outer wall of the crossbeam (5), the inner wall of the stopper (6) is fixedly connected to a motor (10), the output shaft of the motor (10) is fixedly connected to a rotating rod (12), the outer wall of the rotating rod (12) is provided with a winch disc (13) through a transmission module (11), a winch (7) is wound around the outer wall of the winch disc (13), a barbell (8) is fixedly connected to the outer wall of the winch (7), and the outer wall of the base (1) is fixedly connected to a control switch (9); A stabilizing mechanism (4), wherein the stabilizing mechanism (4) is arranged on the outer wall of the base (1); The fixing mechanism (3) comprises a fixing block (31), and a mounting block (32) is detachably mounted on the outer wall of the fixing block (31) via bolts; The stabilizing mechanism (4) comprises a support rod (42), and an outer wall of the support rod (42) is hingedly connected to a hinge rod (43).

2. The liftable high-intensity parallel bar equipment according to claim 1, characterized in that: The rotating rod (12) is rotatably connected to the inner wall of the stopper (6), and the rotating rod (12) is transmission-connected to the winch disc (13) through the transmission module (11), and the winch disc (13) is rotatably connected to the outer wall of the crossbeam (5).

3. The liftable high-intensity parallel bar equipment according to claim 1, characterized in that: The inner wall of the mounting block (32) is elastically connected to a trapezoidal block (36) via a return spring (35); the outer wall of the trapezoidal block (36) is fixedly connected to an extrusion block (37); the inner wall of the mounting block (32) is slidably connected to a connecting rod (38); the outer wall of the connecting rod (38) is fixedly connected to an insert block (39); the outer wall of the crossbeam (5) is fixedly connected to a square block (33); and the outer wall of the square block (33) is provided with a groove (34).

4. The high-intensity exercise parallel bar equipment according to claim 3, characterized in that: One end of the return spring (35) is fixedly connected to the outer wall of the trapezoidal block (36), and the other end of the return spring (35) is fixedly connected to the inner wall of the mounting block (32). The trapezoidal block (36) is slidably connected to the inner wall of the mounting block (32).

5. The high-intensity exercise parallel bar equipment that can be raised and lowered according to claim 3, characterized in that: The extrusion block (37) penetrates the outer wall of the installation block (32), the extrusion block (37) contacts the outer wall of the square block (33), and the installation block (32) and the fixing block (31) both contact the outer wall of the square block (33).

6. The liftable high-intensity parallel bar equipment according to claim 3, characterized in that: The connecting rod (38) is slidably connected to the outer wall of the trapezoidal block (36), and the inserting block (39) is slidably connected to the inner wall of the mounting block (32).

7. The liftable high-intensity exercise parallel bar equipment according to claim 1, characterized in that: The outer wall of the base (1) is fixedly connected to a connecting block (41), the outer wall of the base (1) is fixedly connected to a fixing plate (47), the outer wall of the fixing plate (47) is slidably connected to a moving block (44), the inner wall of the moving block (44) is elastically connected to an inserting rod (46) via an elastic member (45), and the outer wall of the fixing plate (47) is provided with a circular groove (48).

8. The high-intensity exercise parallel bar equipment according to claim 7, characterized in that: The support rod (42) is hinged to the outer wall of the connecting block (41), and the hinge rod (43) is hinged to the outer wall of the moving block (44).

9. The high-intensity exercise parallel bar equipment according to claim 7, characterized in that: One end of the elastic member (45) is fixedly connected to the outer wall of the insertion rod (46), and the other end of the elastic member (45) is fixedly connected to the inner wall of the moving block (44).

10. The liftable high-intensity parallel bar equipment according to claim 7, characterized in that: The insertion rod (46) is slidably connected to the inner wall of the moving block (44), and the insertion rod (46) is clamped with the circular groove (48).

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