Patent Publication Number: US-2022219033-A1

Title: Smith machine capable of angle adjustment and swing

Description:
TECHNICAL FIELD 
     The present invention relates to a Smith machine, and more particularly, to a Smith machine capable of adjusting the movement angle of a barbell manually or using an electric motor and thus performing muscle strength training while a training part is more subdivided. 
     BACKGROUND ART 
     Weight training machines may be classified into upper body training exercise machines and lower body training exercise machines, and these training machines are provided with weight bodies that may appropriately adjust weights according to a user, and thus muscle exercise of an upper body or a lower body of the user is performed by the weight bodies. 
     For example, a lower body exercise machine is an exercise machine that strengthens calf muscles and thigh muscles of the lower body of the user, and an upper body exercise machine is an exercise machine that strengthens back muscles or shoulder muscles of the user or strengthens arm muscles of the user. 
     A so-called Smith machine is present among these exercise machines and includes two support frames located to correspond to both sides thereof, a barbell bar hanging between the two support frames, and disc-shaped weight bodies fitted into ends of the barbell bar. The user exercises after fitting, into the ends of the barbell bar, the disc-shaped weight bodies corresponding to a weight that may be lifted by the user himself/herself. 
     The support frames only serve as a guide so that the barbell bar may be elevated. 
     In barbell exercise, a specific part of muscles may be stimulated according to an angle at which the barbell is lifted up. However, the existing Smith machine has a limitation in stimulating the muscles because the Smith machine is used while the angle thereof is fixed to a single angle. 
     In order to overcome this limitation, the present inventor applied Korean Patent Application No. 10-2016-0149279 titled “Smith machine capable of angle adjustment and swing.” 
     Meanwhile, the related application invention of the present inventor had a disadvantage in that due to the somewhat complicated configuration, the manufacturing costs increased, and the weight thereof was heavy. 
     RELATED ART DOCUMENT 
     Patent Document 
     
         
         Patent Document 1: Korean Patent Application No. 10-2016-0149279 
       
    
     DISCLOSURE 
     Technical Problem 
     The present invention is devised to improve the inventor&#39;s Korean Patent Application No. 10-2016-0149279 and is directed to providing a Smith machine capable of angle adjustment and swing that allows a frame for guiding elevation of a barbell bar to swing so that the effect of exercise may be changed according to a swing angle, and particularly, a Smith machine in which, by replacing a weight with a tensile elastic member, the volume may be reduced, a configuration may be simplified, and the stability may be improved when the swing angle is adjusted in a manual manner, and in addition, since the Smith machine may be used in an electric manner, a user may set the swing angle of the frame without effort, and furthermore, an exercise program that satisfies various exercise purposes may be applied. 
     Technical Solution 
     One aspect of the present invention provides a Smith machine including a frame part including two vertical pillars, a horizontal beam connecting upper ends of the two pillars, and support bases formed below the two pillars and configured to form an exercise space, a swing part formed in the exercise space and including a guide part having both columns hinge-coupled to both of the support bases, a support connecting upper ends of both of the columns, and rack bars formed in the columns, the guide part that is integrally coupled to the swing part to perform a swing operation together so as to guide raising or lowering of a barbell, an angle adjustment part for adjusting an angle of the swing part, and a barbell part coupled to the guide part to be vertically movable along the guide part, wherein the angle adjustment part includes a swing body driven in a manual manner or electrical manner and including an extension panel, which is fixed to an upper end of a shaft member of the swing part and vertically formed downward through a slit of the support base, and a bracket panel formed at a lower end of the extension panel, and a load support part in which a plurality of elastic members connected to the support base and the swing part are formed symmetrically to each other on both sides thereof and which compensates for a load change value and exerts a supporting force to prevent a sudden inclination when a swing angle of the swing part changes. 
     Advantageous Effects 
     According to the present invention, a Smith machine capable of angle adjustment and swing that allows a frame for guiding elevation of a barbell bar to swing so that the effect of exercise can be changed according to a swing angle is provided, and particularly, by replacing a weight with a tensile elastic member, the volume can be reduced, a configuration can be simplified, and the stability can be improved when the swing angle is adjusted in a manual manner, and in addition, since the Smith machine can be used in an electric manner, a user can set the swing angle of the frame without effort, furthermore, an exercise program that satisfies various exercise purposes can be applied. 
    
    
     
       DESCRIPTION OF DRAWINGS 
         FIGS. 1 and 2  are perspective views illustrating a Smith machine according to an embodiment. 
         FIG. 3  is a front view illustrating the Smith machine according to the embodiment. 
         FIG. 4  is a side view illustrating the Smith machine when a “swinging part ( 4 )” is inclined at 90 degrees according to the embodiment. 
         FIG. 5  is a side view illustrating the Smith machine when the “swinging part ( 4 )” is inclined at −25 degrees according to the embodiment. 
         FIG. 4  is a side view illustrating the Smith machine when the “swinging part ( 4 )” is inclined at 115 degrees according to the embodiment. 
         FIG. 7  is a front view illustrating the Smith machine when a “stopper unit” is in a locked state according to the embodiment. 
         FIG. 8  is a front view illustrating the Smith machine when the “stopper unit” is in an unlocked state according to the embodiment. 
         FIG. 9  is a perspective view illustrating the “stopper unit” in the Smith machine according to another embodiment. 
         FIG. 10  is a front view illustrating a locked state of the stopper unit of  FIG. 9 . 
         FIG. 11  is a front view illustrating a unlocked state of the stopper unit of  FIG. 9 . 
         FIG. 12  is a perspective view illustrating a “bar weight compensation unit  5 ” in the Smith machine according to the embodiment. 
         FIG. 13  is a perspective view illustrating a locked state of a “low sensor” in the Smith machine according to the embodiment. 
         FIG. 14  is a perspective view illustrating an unlocked state of the “low sensor” in the Smith machine according to the embodiment  FIG. 15  is a perspective view illustrating an electric Smith machine according to another embodiment. 
         FIGS. 16 and 17  are partially enlarged views of the electric Smith machine illustrated in  FIG. 15 . 
     
    
    
     DESCRIPTION OF REFERENCE NUMERALS 
       
     
       
         
           
               
             
               
                   
               
               
                 [Description of reference numerals] 
               
               
                   
               
             
            
               
                   
               
            
           
           
               
               
            
               
                 2: Left and right vertical frame parts 
                 4: Swing part 
               
               
                 6: Guide part 
                 7: Angle adjustment part 
               
               
                 8: Barbell part 
                 22: Left and right vertical pillars 
               
               
                 24: Beam 
                 26: Support base 
               
               
                 42: Column 
                 44: Rack bar 
               
               
                 72: Swing body 
                 74: Load support part 
               
               
                 C1, C2: Elastic member 
                 5: Bar weight compensation unit 
               
               
                 52: Elastic body 
                 54: Wire 
               
               
                 55: Second pulley 
                 3: Stopper unit 
               
               
                 31: Fixed handle 
                 32: Operation handle 
               
               
                 33: Connection piece 
                 34: First fixing pin 
               
               
                 35: Detection member 
                 36: Low sensor 
               
               
                 37: Rod 
                 39: Second fixing pin 
               
               
                 L1: First link piece 
                 L2: Second link piece 
               
               
                 L3: Third link piece 
                 75: First angle adjustment bracket 
               
               
                 76: Second angle adjustment bracket 
                 M: Brake-type deceleration motor 
               
               
                 110: Solenoid 
                 120: Adjustment pin 
               
               
                 200: Height detection unit 
                 220: Pulley 
               
               
                   
               
            
           
         
       
     
     MODES OF THE INVENTION 
     Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. 
     Prior to the description, terms described below are defined in consideration of functions in the present invention, and it is specified that the terms should be interpreted as concepts consistent with the technical spirit of the present invention and meanings commonly used or generally recognized in the art. 
     Further, when it is determined that a detailed description of a widely known function or configuration related to the present invention may make the subject matter of the present invention unclear, the detailed description will be omitted. 
     Here, in the accompanying drawings, a part is illustrated in an exaggerated or simplified manner for convenience and clarity of description and understanding of a configuration and operation of the technology, and components do not exactly coincide with the actual sizes. 
     As illustrated in  FIGS. 1 to 4 , a Smith machine A 1  capable of angle adjustment and swing according to an embodiment of the present invention includes a frame part  2  that includes two vertical pillars  22 , a horizontal beam  24  connecting upper ends of the two pillars  22 , and support bases  26  formed below the two pillars  22  and forms an exercise space, a swing part  4  which is formed in the exercise space, which performs a swing operation while being hinge-coupled to the support base  26  through a shaft member  41 , and in which a rack bar  44  having a plurality of locking steps  442  is formed so that the height of a barbell bar  100  is adjusted, a guide part  6  which is integrally coupled to the swing part  4  to perform a swinging operation together so as to guide raising or lowering of the barbell bar  100 , an angle adjustment part  7  for adjusting the angle of the swing part  4 , and a barbell bar  100  coupled to the guide part  6  to be vertically movable along the guide part  6 . 
     In the description of the present invention, since the left and right sides of a product are symmetrical to each other, only one side will be described. 
     The frame part  2  may include the two vertical pillars  22  and the horizontal beam  24  connecting the upper ends of the two pillars  22 , and the support base  26  may be mounted in a “┐” shape on both lower sides thereof to provide a supporting force. 
     The swing part  4  includes vertical columns  42  hinge-coupled to both of the support bases  26  through the shaft members  41  and a support  43  for connecting the upper ends of both columns  42 , and the guide part  6  having the rack bar  44  is included in each column  42 . 
     An angle gauge  150  is formed at an end of the shaft member  41 . 
     The angle gauge  150  is formed with a number and an indicator so that the inclination of the swing part  4  may be visually measured. 
     The guide part  6  is integrally coupled to the swing part  4  to perform a swing operation together so as to guide the raising or lowering of the barbell bar  100 . 
     The guide part  6  includes a vertical elevation guide rod  62  parallel to the column  42  and a socket  64  coupled to the elevation guide rod  62  to be vertically elevated, the socket  64  is connected to the barbell bar  100 , a hanger  102  is formed on one side of the barbell bar  100  and is coupled to any one of the plurality of locking steps  442  of the rack bar  44 , and thus the height may be fixed. 
     The shaft member  41  protrudes from one side of the column  42 , is formed horizontally, and is rotatably hinge-coupled to a bearing  412  of the support base  26 . 
     The angle adjustment part  7  includes a swing body  72  including an extension panel  722  that has an upper end fixed to the shaft member  41  formed on one side of the column  42  of the swing part  4  and is formed vertically downward to pass through a slit  260  of the support base  26  and a bracket panel  724  formed at a lower end of the extension panel  722 , and a load support part  74  that compensates for a load change value and exerts the supporting force to prevent a sudden inclination when a swing angle of the swing part  4  changes as a plurality of elastic members C 1  and C 2  connected to the support base  26  and the swing body  72  are formed symmetrically to each other on both sides. 
     In more detail, for convenience of description, the plurality of elastic members C 1  and C 2  are classified into first and second elastic members C 1  and C 2 . 
     According to an example, the first elastic member C 1  has one end fixed to a first holder  741  formed in the support base  26  and the other end fixed to and installed in a second holder  742  formed in the bracket panel  724  of the swing body  72 . 
     The second elastic member C 2  has one end fixed to a third holder  743  formed in the support base  26  and the other end connected to and installed in a fourth holder  744  formed in the bracket panel  724  of the swing body  72 . 
     Thus, elastic forces are applied to the first and second elastic members C 1  and C 2  in directions opposite to each other, and thus complementary forces may be exerted when the angle of the swing part  4  rotates. 
     According to an embodiment, the first and second elastic members C 1  and C 2  are coil springs. 
     The first and second elastic members C 1  and C 2  may be installed so that middle parts thereof are wound around a roller  263  formed in the support base  26  and are thus bent. 
     Due to this bent shape, any one of the first and second elastic members C 1  and C 2  may be installed in an “L” shape or a “⊏” shape. 
     As illustrated in  FIG. 1 , the middle part of the first elastic member C 1  is wound around the roller  263 , and thus the first elastic member C 1  is bent in an “L” shape. 
     The first and second elastic members C 1  and C 2  are not structurally connected to first and second angle adjustment brackets  75  and  76 . 
     Thus, when the swing body  72  is inclined to one side, the elastic member C 1  on the one side is contracted and the elastic member C 2  on the other side is extended. 
     For this reason, a weight is compensated for the inclination of the swing part  4 , and thus the angle may be easily adjusted even with one hand without effort. 
     Meanwhile, a low sensor  36  for detecting the lowest point of the barbell bar  100  is formed. 
     As illustrated in  FIG. 13 , the low sensor  36  includes a shaft  361  which has slots  362   a  and  362   b  formed on upper and lower sides thereof and includes a first operation piece  361   a  longitudinally formed by coupling the upper slot  362   a  and a pin p 1  formed in the column  42  and a second operation piece  361   b  longitudinally formed by coupling the lower slot  362   b  and a pin p 2  formed in the second column  42 , a detection piece  366  which is formed on one side of the second operation piece  361   b  at a right angle and in which the barbell bar  100  is in contact, and a detection member  35  which includes a guide shaft  352  longitudinally formed in a housing  351  mounted on the column  42 , an elastic body  353  coupled to the guide shaft  352 , and a socket  354  supported by the elastic body  353 , coupled to the guide shaft  352  to operate vertically, and coupled to the detection piece  366 . 
     The elastic body  353  of the detection member  35  always pushes the detection piece  366  and the shaft  361  upward. 
     A fitting protrusion  357  is formed outside the socket  354  and coupled to the housing  351 . 
     The socket  354  is provided with a linear bearing  355  therein and coupled to the guide shaft  352 . 
     The housing  351  is coupled to the column  42  in a welding manner, and the socket  354  does not rotate. 
     The elastic body  353  is a compression coil spring and always raises the socket  354  upward. 
     The socket  354  and the detection piece  366  are connected to each other. Thus, the housing  351  is always located at an upper point of the guide shaft  352 . 
     Thus, when the barbell bar  100  is spaced apart from the detection piece  366 , since the first operation piece  361   a  and the second operation piece  361   b  are raised, an upper end of the first operation piece  361   a  overlaps a lower portion of a connection piece  33 , and thus a current state is a locked state. 
     In this locked state, even when an operation handle  32  is pulled, the connection piece  33  is not moved, and thus the swing part  4  may be maintained in a locked state. 
     Meanwhile, as illustrated in  FIG. 14 , when the barbell bar  100  is placed on the detection piece  366 , since the detection piece  366  and the first operation piece  361   a  and the second operation piece  361   b  connected thereto are lowered, the upper end of the first operation piece  361   a  is separated from the connection piece  33 , and thus the current state is an unlocked state. 
     Thus, in the unlocked state, since the connection piece  33  may be operated by pulling the operation handle  32 , the angle of the swing part  4  may be operated. 
     Thus, only when the low sensor  36  detects the barbell bar  100 , is the adjustment of the angle of the swing part  4  permitted, thereby ensuring the safety. 
     The adjustment of the angle of the swing part  4  will be described below. 
     Meanwhile, the Smith machine further includes bar weight compensation units  5  that are formed on both of the columns  42  and generate a load when the barbell bar  100  is raised. 
     As illustrated in  FIG. 12 , the bar weight compensation unit  5  includes an elastic body  52  embedded and mounted inside the column  42  in a longitudinal direction, a first pulley  53  formed at an inner lower end of the column  42  so that a lower portion of the elastic body  52  is wound therearound and the direction is switched to the upper side, a wire  54  connected to an end of the elastic body  52  facing upward, and a second pulley  55  formed in a protrusion (protrusion pipe for fixing an upper part of the elevation guide rod  62 ) of the column  42  so that the wire  54  is wound therearound, wherein the other end of the wire  54  is fixed to the barbell bar  100 . 
     The elastic body  52  may be a coil spring having a predetermined length. 
     Thus, when the barbell bar  100  is raised, the elastic body  52  is contracted, but when the barbell bar  100  is lowered, the elastic body  52  is stretched, and thus the weight of the barbell bar  100  is reduced by half. 
     Alternatively, the elastic body  52  including a spiral spring instead of the coil spring having a predetermined length is mounted at a location of the second pulley  55 , one end of the spiral spring is connected to a part of the barbell bar  100 , and thus the weight of the barbell bar  100  may be simply reduced by half using an elastic rotational force of the spiral spring. 
     Meanwhile, the angle adjustment part  7  includes a stopper unit  3  that fixes or releases the swing part  4  at an inclined angle or a vertical angle so as to set a fixed state or a swingable state of the swing part  4 . 
     As illustrated in  FIG. 7 , the stopper unit  3  includes a first link piece L 1  that includes a fixed handle  31  formed on one side of the column  42 , an operation handle  32  formed on one side of the fixed handle  31 , and a connection piece  33  connected to the operation handle  32  and has one end fixed to the connection piece  33  and a middle portion hinge-coupled to the column  42  through a rotary shaft H 2 , a second link piece L 2  that is coupled to a lower end of the first link piece L 1  through a hinge H, has a middle portion hinge-coupled to the column  42  through a rotary shaft H 3 , and has a first fixing pin  34  formed at a lower end thereof, a rod  37  that has one end hinge-coupled to the first link piece L 1  and is horizontally formed above the frame part  2 , and a third link piece L 3  that is hinge-coupled to the other end of the rod  37 , has a middle portion hinge-coupled to the other column  42  through a rotary shaft H 4 , and has a second fixing pin  39  formed at a lower end thereof. 
     The second link piece L 2  is connected, the rotary shaft H 3  is located in the middle of the second link piece L 2 , the lower end of the second link piece L 2  is connected to a pin end of the first fixing pin  34 , an upper end of the second link piece L 2  is hinge-coupled to the first link piece L 1 , and the rotary shaft H 2  is coupled to the middle portion of the first link piece L 1 , which is like the second link piece L 2 . 
     Further, the first angle adjustment bracket  75  which is formed in a lower portion of the one column  42 , in which a plurality of angle adjustment holes  750  are formed in an arc shape sharing a center with the shaft member  41  and to which the first fixing pin  34  is coupled, is provided. 
     Further, the second angle adjustment bracket  76  which is formed in a lower portion of the other column  42 , in which a plurality of angle adjustment holes  760  are formed in an arc shape sharing a center with the shaft member  41  and to which the second fixing pin  39  is coupled, is provided. 
     A first guide member G 1  having one open side so that the second link piece L 2  is accommodated therein and having a space formed therein is formed on the one column  42 . 
     A second guide member G 2  having one open side so that the third link piece L 3  is accommodated therein and having a space formed therein is formed on the other column  42 . 
     The first and second guide members G 1  and G 2  have openings formed in directions in which the second link piece L 2  and the third link piece L 3  rotate, have the blocked other sides, and thus have “c”-shaped cross sections. 
     Thus, as illustrated in  FIG. 11 , when the operation handle  32  is pulled (in a leftward direction in  FIG. 11 ), the connection piece is pulled, an upper portion of the second link piece L 2  connected to the connection piece  33  rotates in a counterclockwise direction with respect to the drawing, and the first link piece L 1  is interlocked with the second link piece L 2  to rotate in a clockwise direction. 
     The first fixing pin  34  formed at the lower end of the second link piece L 2  is spaced apart from the first angle adjustment bracket  75  and thus is in a free state. 
     At the same time, as the rod  37  interlocks with the clockwise rotation of the first link piece L 1 , the rod  37  moves to the right side, and as the third link piece L 3  rotates in the clockwise direction, the lower second fixing pin  39  is spaced apart from the second angle adjustment bracket  76  and thus is in a free state. 
     In this way, the first fixing pin  34  and the second fixing pin  39  are spaced apart from the first angle adjustment bracket  75  and the second angle adjustment bracket  76 , and thus the current state may be an unlocked state. 
     Meanwhile, when the operation handle  32  is pulled and then released, the operation handle  32  returns to an original location thereof. 
     Thus, the first fixing pin  34  and the second fixing pin  39  are always inserted into the angle adjustment holes  750  and  760  of the first and second angle adjustment brackets  75  and  76 , and thus the angle of the swing part  4  may be fixed. 
     As illustrated in  FIG. 17 , the first fixing pin  34  and the second fixing pin  39  each include a housing  121 , a shaft pin  122  coupled to an inside of the housing  121  and having one end coupled to a solenoid  110 , a coil spring  123  coupled to the shaft pin  122 , and a cover  124  coupled to block the housing  121 . 
     Thus, when the operation handle  32  is pulled or the solenoid  110  is turned on, the shaft pin  122  is retracted and is thus separated from the angle adjustment holes  750  and  760  of the angle adjustment bracket  75  and  76 , and when the operation handle  32  is pulled and then released or the solenoid is turned off, the shaft pin  122  is extracted and is thus inserted into and fixed to the angle adjustment holes  750  and  760  of the angle adjustment bracket  75  and  76 . 
     Meanwhile,  FIGS. 9 to 11  are views illustrating a stopper unit according to another embodiment. 
     A stopper unit  300  according to another embodiment is formed in an upper portion of a frame. 
     As illustrated in  FIG. 9 , the stopper unit  300  according to another embodiment includes a first link piece L 1  that includes the fixed handle  31  formed on one side of the column  42 , the operation handle  32  formed on one side of the fixed handle  31 , and the connection piece  33  connected to the operation handle  32  and has one end fixed to the connection piece  33  and a middle portion hinge-coupled to the column  42  through a rotary shaft  311 , an upper link piece  312  formed horizontally at an upper end of the first link piece  310 , a holder  313  formed at the upper link piece  312  at a right angle, a first fixing pin  314  connected to the holder  313  and formed parallel to the upper link piece  312 , and an angle adjustment bracket  340  which is fixedly installed at upper portions of both vertical pillars  22  of the frame part  2  and in which a plurality of angle adjustment holes  342  are formed so that the first fixing pin  314  is fitted therein. 
     Sine the angle adjustment bracket  340  is fixed to and mounted on an upper portion of the frame part  2 , the Smith machine is firm and has small deformation and tolerance, a load applied to the angle adjustment hole  342  is low, and thus product lifetime is extended. 
     The first fixing pin  314  is inserted into a pin guide  316  so that the horizontal movement thereof is guided, a spring  315  is fitted in an outer circumferential surface of the first fixing pin  314 , both sides of the spring  315  are supported by the pin guide  316  and a fixing bracket  317 , and thus a force for pushing the first fixing pin  314  is applied. 
     Meanwhile, a second angle adjustment bracket  340   b  may be formed by being spaced apart from the angle adjustment bracket  340  at a predetermined interval. 
     The second angle adjustment bracket  340   b  is mounted on the upper portion of the opposite frame part  2 . 
     A rod  370  that has one end hinge-coupled to an upper portion of the first link piece  310  and is horizontally formed on the support  43 , a second link piece  320  that has one end hinge-coupled to the rod  370  and is mounted on the support  43  to be rotatable about a hinge shaft  321 , and a second fixing pin  322  connected to the second link piece  320  are provided, and the second fixing pin  322  is thus fitted and coupled to the angle adjustment hole  342  of the second angle adjustment bracket  340   b , thereby exerting a fixing force. 
     As illustrated in  FIG. 10 , when the locked state is described, the first link piece  310  is in a vertical state in a state in which the operation handle  32  is not operated, and the upper first fixing pin  314  is in a fixed state of being fitted and coupled to the angle adjustment hole  342  of the first angle adjustment bracket  340 . 
     Thereafter, as illustrated in  FIG. 11 , when a release operation is described, when the operation handle  32  is pulled (in a leftward direction), the connection piece  33  is pulled, the first link piece  310  connected to the connection piece  33  rotates about the hinge shaft  311 , and the upper link piece  312  of the first link piece  310  moves rightward. Thus, the first fixing pin  314  connected thereto moves rearward and is separated from the angle adjustment hole  342  of the angle adjustment bracket  340 , and thus the current state is a release state. 
     In addition, when the rod  370  moves rightward with reference to  FIG. 11  to push a lower end of the second link piece  320 , the second link piece  320  rotates about the hinge shaft  321 , the second fixing pin  322  connected to an upper portion of the second link piece  320  is pulled leftward to be separated from the angle adjustment hole  342  of the second angle adjustment bracket  340   b , and thus the current state may be a release state. 
     Meanwhile, according to another embodiment, the load support part may be formed in an electrical manner. 
     As illustrated in  FIG. 15 , a load support part T according to another embodiment A 2  includes a brake-type deceleration motor M connected to the left and right swing parts  4  and mounted on the support base  26  using a bracket  269 , the first and second angle adjustment brackets  75  and  76  in which the angle adjustment holes  750  and  760  corresponding to a plurality of angles are formed, an adjustment pin  120  which is selectively fitted in the angle adjustment holes  750  and  769  and on which the solenoid  110  is mounted, and an encoder (not illustrated) formed inside the brake-type deceleration motor M. 
     Further, the load support part T includes an electric angle adjustment part that identifies a current angle of the swing part  4  by driving the brake-type deceleration motor M and an operation panel  78  that operates a manual and a program. 
     Further, as illustrated in  FIG. 16 , the load support part T includes a clutch unit M- 2  that may selectively connect or separate the brake-type deceleration motor M to or from a lower end of the swing part  4 . 
     The clutch unit M- 2  may be connected or disconnected according to a control signal of the operation panel  78 . 
     Meanwhile, a pulley  220  that is pressed against one of the left and right elevation guide rods  62  that guide the barbell bar  100  when the barbell bar  100  moves upward or downward and rotates when the barbell bar  100  is elevated and a height detection unit  200  including the encoder formed inside the pulley  220  are formed. 
     Thus, the encoder (not illustrated) formed inside the pulley  220  identifies the current height of the barbell bar  100 . 
     When the user sets an electric mode in the operation panel  78 , the clutch unit M- 2  is turned on, and thus the brake-type deceleration motor M is connected to the lower end of the swing part  4 . 
     Thereafter, when the angle is adjusted on the operation panel  78 , the solenoid  110  located behind the adjustment pin  120  is operated. Thus, the adjustment pin  120  is separated from the angle adjustment brackets  75  and  76 , and at the same time, the brake-type deceleration motor M rotates at the corresponding angle. 
     Thereafter, when the angle is adjusted to an appropriate angle, the brake-type deceleration motor M stops, and the solenoid  110  fixedly inserts the adjustment pin  120  into the angle adjustment holes  750  and  760  of the angle adjustment brackets  75  and  76 . 
     The adjustment pin  120  includes the housing  121 , the shaft pin  122  coupled to the inside of the housing  121  and having one end coupled to the solenoid  110 , the coil spring  123  coupled to the shaft pin  122 , and the cover  124  coupled to block the housing  121 . 
     Thus, when the solenoid  110  is turned on, the shaft pin  122  is retracted and is thus separated from the angle adjustment holes  750  and  760  of the angle adjustment brackets  75  and  76 , and when the solenoid  110  is turned off, the shaft pin  122  is extracted and is thus fixedly inserted onto the angle adjustment holes  750  and  760  of the angle adjustment brackets  75  and  76 . 
     The brake-type deceleration motor M has a brake formed therein, and when the brake-type deceleration motor M rotates, the brake does not perform its function, and when the rotation of the brake-type deceleration motor M stops, the brake performs its function to firmly fix the angle of the swing part  4 . 
     When the user uses a program method, the electric angle adjustment part may control the barbell bar  100  to freely move in a C or S shape by changing the angle of the swing part  4  according to a height point of the barbell bar  100  by program control. 
     The user may make, store, and use various programs suitable for the purpose of exercise and may directly make a program. 
     For example, when the user performs a bench press for chest exercise, the angle of the barbell bar  100  may be automatically adjusted from a flat bench angle at a starting point via an incline angle in a middle point and to a decline angle at the highest point. 
     When it is assumed that a rotation angle of the swing part  4  is changed in units of 5 degrees, the rotation angle is initially maintained at 90 degrees, is then reduced to 25 degrees in increments of 5 degrees so that an incline bench press may be performed, and is then increased to 115 degrees so that a decline bench press may be performed. 
     When the angle is changed, the encoder in the brake-type deceleration motor M and the encoder in the pulley  220  pressed against the elevation guide rod  62  identify the angle of the swing part  4  and the height of a barbell, and while the solenoid  110  located behind the adjustment pin  120  maintains the adjustment pin  120  in a separated state, the brake-type deceleration motor M is driven, and thus the swing part  4  rotates as a whole. 
     Meanwhile, after use, the solenoid  110  returns to an original location thereof at a set angle, inserts the adjustment pin  120  into the angle adjustment brackets  75  and  76 , and fixes the angle of the swing part  4 . 
     Meanwhile, the present invention is not limited by the above-described embodiments and the accompanying drawings, and various modifications and applications not exemplified without departing from the technical spirit of the present invention are possible, and components may be substituted and the present invention may be changed to equivalent other embodiments. Thus, it should be interpreted that contents related to modifications and applications of the features of the present invention are included in the scope of the present invention.