CN218076160U - Chest-developer - Google Patents

Abstract

The utility model discloses a chest expander, include: the elastic rope has elasticity; the sensor device is arranged at one end of the elastic rope and comprises a power supply part, a circuit board and a strain gauge, the power supply part and the strain gauge are respectively and electrically connected with the circuit board, and the strain gauge comprises a pulling part; one end of one of the plurality of traction assemblies is connected with the pulling part; adjusting device includes the casing, lock piece and wrapping post, is equipped with the button on the casing, lock piece and wrapping post all are located the casing, and lock piece links to each other with the button, and lock piece switches between locking position and unblock position, and the one end of stretch cord penetrates in the casing, and behind the wrapping post was located to the duplex winding, wear out from the casing, and the protective sheath wraps up in the outer peripheral face of stretch cord, and the protective sheath is along with the deformation of stretch cord and deformation, according to the utility model discloses a chest expander has guaranteed measured data's accuracy, can adjust the length of chest expander simultaneously to make the chest expander can adapt to different heights, the user of different demands, improved the application scope of chest expander.

Description

Chest-developer

Technical Field

The utility model belongs to the technical field of the body-building equipment technique and specifically relates to a chest expander is related to.

Background

At present, people live at a fast pace, the working pressure is higher and higher, the body cannot keep up with the requirements of working life, and a lot of people are in sub-health or unhealthy conditions due to lack of proper outdoor exercises, so that people usually can reach the aim of exercise and fitness by means of fitness equipment in a gymnasium or at home.

Among the correlation technique, the chest expander for body-building does not set up the regulator for the stretch cord of chest expander can not adjust length according to user's demand, thereby can not satisfy user's demand better, influences user's use and experiences sense and body-building effect, simultaneously can greatly reduced chest expander's application scope.

In addition, the foil gage of current chest expander is two stress points atress, leads to one of them in two stress points can produce reverse effort in the use of chest expander to can influence chest expander measured data's accuracy, the structural strength of foil gage is relatively poor simultaneously, and the cost of chest expander is higher.

SUMMERY OF THE UTILITY MODEL

The utility model discloses aim at solving one of the technical problem that exists among the prior art at least. Therefore, an object of the utility model is to provide a chest expander accurately reachs the size of applying pulling force through the deformation of pulling the portion, has guaranteed measured data's accuracy, can adjust the length of chest expander simultaneously to make the chest expander can adapt to the user of different heights, different demands, guaranteed that user's use is experienced and body-building effect, improved the application scope of chest expander.

According to the utility model discloses chest expander, include: a bungee cord having elasticity; the sensor device is arranged at one end of the elastic rope and comprises a power supply part, a circuit board and a strain gauge, the power supply part and the strain gauge are respectively and electrically connected with the circuit board, and the strain gauge comprises a pulling part; a plurality of traction assemblies, wherein one end of one of the traction assemblies is connected with the pulling part; the adjusting device comprises a shell, a locking piece, a resetting piece and a winding post, wherein a key is arranged on the shell, part of the key is positioned in the shell, the locking piece and the winding post are both positioned in the shell, the locking piece is connected with the key, the locking piece is switched between a locking position and an unlocking position, one end of the resetting piece is connected with the shell, the other end of the resetting piece is connected with one end, far away from the key, of the locking piece, the resetting piece provides restoring force for switching the locking piece from the unlocking position to the locking position, one end of the elastic rope penetrates into the shell and penetrates out of the shell after being wound on the winding post; when the locking piece is located at the unlocking position, the locking piece compresses the resetting piece and the elastic rope is separated from the locking piece so as to adjust the length of the elastic rope, and when the locking piece is located at the locking position, the elastic rope is clamped on the locking piece.

According to the utility model discloses chest expander through making the foil gage include one and draw the portion of pulling, and draw the portion of pulling and link to each other with the subassembly that pulls, and the lock piece is established in the casing and is linked to each other with the button, and the lock piece can switch between locking position and unblock position. From this, the stress point of the foil gage of chest expander is one to can avoid producing reverse effort at the foil gage during operation, and then can accurately obtain the size of applying pulling force through the deformation of pulling the portion, guarantee measured data's accuracy, can adjust the length of chest expander simultaneously, so that the user of different heights, different demands can be adapted to the chest expander, guaranteed user's use and experienced and body-building effect, improved the application scope of chest expander.

According to some embodiments of the present invention, the casing includes an upper casing and a lower casing that are mutually locked, the upper casing and at least one of the lower casings are formed with at least one first spacing post, the first spacing post extends in the direction of orientation the casing center, the locking piece is located when the locking position, the elastic cord is held between the locking piece and the first spacing post.

According to the utility model discloses a some embodiments, be equipped with on the first spacing post and end portion, end portion along the orientation the direction slope at casing center extends.

According to the utility model discloses a some embodiments, the button is in the edge at the extending direction's of first spacing post both ends is formed with at least one breach, the lock piece is located during the unblock position, the breach with the cooperation of first spacing post.

According to some embodiments of the utility model, be formed with the opening on the casing, the lock is established the opening part, the edge of button is equipped with the boss, the lock is located during the locking position, the boss with the open-ended edge ends.

According to some embodiments of the invention, the strain gauge further comprises: a fixing portion having a through hole formed therein and penetrating therethrough in a thickness direction of the fixing portion; the extension part is arranged in the through hole, two ends of the extension part are respectively connected with the side wall of the through hole, one end of the pull part is connected with the extension part, and the other end of the pull part is spaced from the side wall of the through hole.

According to some embodiments of the present invention, the extension portion includes a first extension section, a second extension section and a third extension section connected to each other, the extension portion is n-shaped, and both ends of the extension portion are connected to the same side wall of the through hole.

According to some embodiments of the present invention, a side surface of the thickness direction of the fixing portion is provided with a protrusion, the protrusion being located adjacent to the fixing portion on one side of the open side of the extension portion.

According to some embodiments of the invention, the chest expander further comprises: the protective sleeve wraps the outer peripheral face of the elastic rope, and deforms along with deformation of the elastic rope.

According to some embodiments of the invention, the chest expander further comprises a first sleeve for securing one end of the protective sleeve with the one end of the bungee cord and a second sleeve for securing the other end of the protective sleeve with the other end of the bungee cord.

According to some embodiments of the invention, the outer peripheral wall of the wrapping post is a rough surface.

According to some embodiments of the present invention, the accommodating cavity of the casing has an installation part, the chest expander further comprises: the separator, the separator is connected the other end periphery of stretch cord just locates in the installation department, the separator will stretch cord the other end with the installation department is spaced apart, so that stretch cord the other end can free rotation.

According to some embodiments of the utility model, the separator is the annular and the cover is established the stretch cord the periphery of the other end.

According to some embodiments of the invention, the other end of the bungee cord has a protrusion, the protrusion extending along a circumferential direction of the bungee cord.

According to some embodiments of the present invention, each of the traction assemblies includes a connection bridge and a hook connected to each other, and one end of the connection bridge of the one of the plurality of traction assemblies is connected to the pulling part; the chest expander still includes wrist area and ankle area, the wrist area with the ankle area is respectively with a plurality of the couple links to each other.

According to some embodiments of the invention, the sensor device further comprises: the shell is provided with an installation cavity, the power supply part, the circuit board and the strain gauge are arranged in the installation cavity, and the circuit board is provided with a control chip; the display screen is arranged on the shell and is in communication connection with the control chip.

According to some embodiments of the invention, the sensor device further comprises: a heart rate sensor disposed within the housing.

According to some embodiments of the invention, the sensor device further comprises: a speaker disposed within the housing.

Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.

Drawings

The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

fig. 1 is a schematic view of a chest expander according to an embodiment of the present invention;

FIG. 2 is a schematic view of the chest expander shown in FIG. 1, with the wrist strap and ankle strap not shown;

FIG. 3 is a schematic view of the lockout member of the adjustment device of the chest expander illustrated in FIG. 1 in a lockout position;

figure 4 is a schematic view of the release member of the adjustment device of the chest expander shown in figure 1 in a locked position;

fig. 5 is a schematic view of a button, a spring member and an upper case of the adjusting device of the chest expander shown in fig. 1;

figure 6 is a schematic view of the locking member of the adjustment device of the chest expander shown in figure 1;

fig. 7 is a partial enlarged view of the chest expander shown in fig. 1;

figure 8 is a schematic view of the chest expander shown in figure 7 with portions of the housing not shown;

FIG. 9 is a schematic view of another angle of the chest expander shown in FIG. 7, with the mounting cover not shown;

figure 10 is a schematic view of the chest expander shown in figure 7 with the housing not shown;

FIG. 11 is a schematic view of a strain gage of the sensor arrangement of the chest expander shown in FIG. 1;

FIG. 12 is a schematic view of another angle of a strain gage of the sensor arrangement of the chest expander shown in FIG. 1;

figure 13 is a schematic view of a sensor assembly and traction assembly of a chest expander according to another embodiment of the present invention;

figure 14 is a schematic view of the protective case and pulling assembly of the chest expander shown in figure 13;

fig. 15 is a schematic view of the protective case of the chest expander shown in fig. 14;

figure 16 is a schematic view of a coupling housing of the chest developer shown in figure 14;

figure 17 is a cross-sectional view of the sensor assembly of the chest expander shown in figure 13;

fig. 18 is an exploded view of a chest expander according to yet another embodiment of the present invention;

fig. 19 is an exploded view of a portion of the construction of the chest expander shown in fig. 18;

FIG. 20 is an enlarged view of portion A circled in FIG. 19;

fig. 21 is an exploded view of another portion of the construction of the chest expander shown in fig. 20.

Reference numerals:

100: a chest expander;

1: an elastic cord; 11: a protrusion; 2: a sensor device; 21: a power supply element; 22: a circuit board; 23: a strain gauge; 231: a pulling part; 2311: mounting holes; 232: a fixed part; 2321: a through hole; 2322: a boss portion;

2323: a first convex section; 2324: a second convex section; 2325: a third convex section; 2326: avoiding the mouth;

233: an extension portion; 2331: a first extension section; 2332: a second extension section; 2333: a third extension segment;

24: a housing; 241: a connecting shell; 2411: a projection; 2412: a limiting groove; 242: a protective shell; 2421: a first chamber; 2422: a second chamber; 2423: supporting ribs; 2424: limiting convex strips; 2425: a trough body;

25: a display screen; 26: a speaker; 27: a control switch; 28: a charging jack; 3: a traction assembly;

31: a connecting bridge; 32: hooking; 4: an adjustment device; 41: a housing; 411: an upper shell; 4111: an installation part;

4112: a first notch; 4113: a first connection section; 4114: a second connection section; 4115: a third connection section;

4116: a winding post; 412: a lower case; 413: a first limit post; 4131: a stopping part; 4132: a guide surface;

414: an opening; 415: a chute; 42: a locking member; 421: a stopper portion; 422: a slider; 423: buckling;

424: a positioning part; 43: a reset member; 44: pressing a key; 441: a second notch; 443: a boss; 45: an anti-slip member;

46: a bayonet; 7: a protective sleeve; 8: a first pipe sleeve; 9: a second pipe sleeve; 10: a separator; 20: a wrist band;

30: an ankle strap.

Detailed Description

A chest expander 100 according to an embodiment of the present invention is described below with reference to fig. 1 to 21.

According to the utility model discloses chest expander 100, including stretch cord 1, sensor device 2, a plurality of traction assembly 3 and adjusting device 4. In the description of the present invention, "a plurality" means two or more.

Specifically, the elastic cord 1 has elasticity, the sensor device 2 is disposed at one end of the elastic cord 1, the sensor device 2 includes a power supply 21, a circuit board 22 and a strain gauge 23, the power supply 21 and the strain gauge 23 are electrically connected to the circuit board 22, respectively, and the strain gauge 23 includes a pulling portion 231. One end of one of the plurality of pulling members 3 is connected to the pulling portion 231.

For example, in the example of fig. 7-12, the strain gage 23 is generally rectangular in shape, with the free end of the pull tab 231 extending in a direction away from the center of the strain gage 23. The center of the strain gauge 23 refers to a position where the center point of the strain gauge 23 is located along the longitudinal direction of the strain gauge 23. The free end of the pulling part 231 can be provided with a mounting hole 2311, the traction assembly 3 can be connected with the strain gauge 23 through the mounting hole 2311, when a user applies pulling force to the traction assembly 3, the free end of the pulling part 231 can deform, the strain gauge 23 can convert the deformation of the strain gauge 23 into a corresponding electric signal and transmit the electric signal to the circuit board 22, the circuit board 22 can correspondingly obtain the size of the applied pulling force through the size of the electric signal generated by the strain gauge 23, the duration of the applied pulling force is correspondingly obtained through the duration of the electric signal generated by the strain gauge 23, and therefore the calculation and analysis of heat are achieved. From this, compare with traditional foil gage 23, the stress point on the foil gage 23 is one to can avoid producing reverse effort at foil gage 23 during operation, and then can accurately obtain the size of applying pulling force through the deformation of pulling the portion 231, guarantee measured data's accuracy.

As shown in fig. 3 to 5, the adjusting device 4 includes a housing 41, a locking member 42, and a winding post 4116, the housing 41 is provided with a key 44, a portion of the key 44 is located in the housing 41, the locking member 42 and the winding post 4116 are both located in the housing 41, the locking member 42 is connected to the key 44, the locking member 42 is switched between a locking position and an unlocking position, and one end of the bungee cord 1 penetrates into the housing 41 and winds around the winding post 4116 and then penetrates out of the housing 41.

For example, in the example of FIGS. 1-5, the adjustment device 4 may be mounted in the middle of the bungee cord 1, the winding posts 4116 are formed on the interior walls of the housing 41, and the winding posts 4116 extend in a direction toward the center of the housing 41. When the locking piece 42 is located the unblock position, the length of bungee cord 1 can be adjusted to the user, specifically, when the user sent part of bungee cord 1 into casing 41, bungee cord 1 can remove for wrapping post 4116, because the space in casing 41 is limited, under the drive of bungee cord 1, another part of bungee cord 1 will be extruded in casing 41, can adjust the distance between the one end of regulator and bungee cord 1 from this, and then adjust the length of chest expander 100, so that chest expander 100 can adapt to different heights, the user of different demands, user's use experience and body-building effect have been guaranteed, chest expander 100's application scope has been improved.

When locking piece 42 was located the locking position, the user can adopt chest expander 100 to carry out the body-building, and when using chest expander 100, two parts of bungee cord 1 received the pulling force respectively, and the pulling force is big more, and the winding force of bungee cord 1 on wrapping post 4116 is big more to can fix a position bungee cord 1, avoid bungee cord 1 to remove for adjusting device 4.

It can be understood that the adjusting device 4 can divide the elastic rope 1 into two parts, wherein one part is from one end of the elastic rope 1 to the adjusting device 4, the sensor device 2 is arranged on the part, when a user trains, the user can pull the sensor device 2 through the traction assembly 3 to apply tension to the elastic rope 1, and meanwhile, the sensor device 2 can detect the magnitude of the tension; the other part is from the other end of the elastic rope 1 to the adjusting device 4, on the part, the elastic rope 1 goes around the fixed pulley assembly of the spring exerciser 100, and the user can apply tension to the elastic rope 1 by pulling the fixed pulley assembly during training.

According to the utility model discloses chest expander 100, through making foil gage 23 include one and draw the portion of pulling 231, and draw portion of pulling 231 and draw subassembly 3 and link to each other, lock 42 establishes in casing 41 and links to each other with button 44, and lock 42 can switch between locking position and unblock position. From this, the stress point of chest expander 100's foil gage 23 is one, thereby can avoid producing reverse effort at foil gage 23 during operation, and then can accurately obtain the size of applying tensile force through the deformation of pulling portion 231, measured data's accuracy has been guaranteed, can adjust chest expander 100's length simultaneously, so that chest expander 100 can adapt to different heights, the user of different demands, user's use experience and body-building effect have been guaranteed, chest expander 100's application scope has been improved.

According to some embodiments of the present invention, as shown in fig. 1 to 4, the locking member 42 is disposed at the periphery of the elastic cord 1, the locking member 42 is connected to the housing 41 through the reset member 43, and the reset member 43 provides a restoring force for switching the locking member 42 from the unlocking position to the locking position. When the locking member 42 is located at the unlocking position, the locking member 42 compresses the resetting member 43 and the elastic rope 1 is separated from the locking member 42 so as to adjust the length of the elastic rope 1, and when the locking member 42 is located at the locking position, the elastic rope 1 is clamped on the locking member 42.

Referring to fig. 3, when the locking member 42 is in the locked position, the bungee cord 1 is compressed against the locking member 42 with the spring member in an uncompressed state (i.e., the initial state) and a user may use the chest expander 100 for exercise. With reference to fig. 4, when pushing the button 44 downwards, the button 44 drives the locking member 42 to move downwards, so that the locking member 42 is switched to the unlocking position from the locking position, the spring member is compressed at this time, the elastic cord 1 is separated from the inner wall of the locking member 42, and the elastic cord 1 can be stretched freely, so that the user can adjust the length of the elastic cord 1 according to the user's requirement, and the user's body-building effect is ensured. After releasing the button 44, the restoring force in the spring member can push the locking member 42 and the button 44 to move upward, so that the locking member 42 is switched from the unlocking position to the locking position, and the button 44 returns to the original state.

Further, the housing 41 includes an upper housing 411 and a lower housing 412 that are engaged with each other, at least one of the upper housing 411 and the lower housing 412 has at least one first position-limiting post 413 formed thereon, the first position-limiting post 413 extends in a direction toward the center of the housing 41, and when the locking member 42 is located at the locking position, the elastic cord 1 is clamped between the locking member 42 and the first position-limiting post 413. As shown in fig. 3 and 5, the inner wall of the housing 41 may be provided with two first limiting posts 413, the two first limiting posts 413 are respectively located at two ends of the locking member 42 in the length direction of the housing 41, and each first limiting post 413 horizontally extends in a direction toward the lower shell 412. When the lock member 42 is in the lock position, the first stopper post 413 cooperates with the lock member 42 to clamp the bungee cord 1 between the lock member 42 and the first stopper post 413 so that the bungee cord 1 can be secured within the housing 41. Therefore, by arranging the first limiting column 413, on one hand, when the locking piece 42 is located at the locking position, the elastic rope 1 can be more firmly clamped between the locking piece 42 and the first limiting column 413, so that the use experience of the chest expander 100 is ensured, and a user can have a good body building effect; on the other hand, the first stopper 413 can ensure the stability of the key 44 in the unlock position.

Two first restraint posts 413 are shown in fig. 3-5 for illustrative purposes, but it is obvious to those skilled in the art after reading the technical solutions of the present application that the solution can be applied to three or more first restraint posts 413, which also falls within the protection scope of the present invention.

Of course, the present invention is not limited thereto, and the first position-limiting column 413 may also be disposed on the lower shell 412 (not shown); alternatively, the upper shell 411 and the lower shell 412 may be provided with first position-limiting columns 413.

Further, the limiting column is provided with a stop part 4131, and the stop part 4131 extends obliquely in a direction toward the center of the housing 41. Referring to fig. 5, the shape of the resisting portion 4131 is substantially triangular, one end of the resisting portion 4131, which is far away from the first limiting column 413, directly contacts with the elastic cord 1 and faces the locking member 42, and the resisting portion 4131 cooperates with the locking member 42 to lock and fix the elastic cord 1, so as to prevent the elastic cord 1 from moving during the use of the chest expander 100, and enhance the use experience of the chest expander 100.

According to some embodiments of the present invention, the key 44 is formed with at least one first notch 4112 at the edge of the two ends of the extending direction of the limiting column, and when the locking member 42 is located at the unlocking position, the first notch 4112 is matched with the first limiting column 413. For example, in the example of fig. 3 and 4, two first notches 4112 are formed at both side edges of the key 44 in the width direction, respectively, and the two first notches 4112 are spaced apart from each other in the length direction of the key 44. When a user needs to adjust the length of the bungee cord 1 of the chest-expander 100, the user can press the button 44 downwards until the first indentation 4112 on the edge of the button 44 is matched with the first limiting column 413, at this time, the locking member 42 is switched from the locking position to the unlocking position, and the user can adjust the length of the bungee cord 1 by pulling. The first notch 4112 and the first limiting post 413 are matched to limit the button 44, so that the button 44 is prevented from being rebounded to the initial position due to the fact that the button 44 is pressed into the housing 41 in too much amount, and meanwhile, through the matching of the first notch 4112 and the first limiting post 413, a user can be reminded that the locking piece 42 is located at the unlocking position, and the user can adjust the length of the bungee 1 at this time.

Further, an opening 414 is formed on the housing 41, the locking member 42 is disposed at the opening 414, a boss 443 is disposed on an edge of the button 44, and when the locking member 42 is located at the locking position, the boss 443 abuts against the edge of the opening 414. As shown in fig. 3, two ends of the key 44 in the length direction are respectively provided with a boss 443, each boss 443 can extend along the circumferential direction of the key 44, and the maximum distance between the two bosses 443 exceeds the length of the opening 414 on the housing 41, so that when the key 44 moves upwards, the bosses 443 stop moving after contacting the inner wall of the opening 414 of the housing 41, and the key 44 is prevented from being separated from the housing 41.

When the button 44 is in the locked position, the button 44 is not depressed and the spring element is in an uncompressed state with the boss 443 in contact with the edge of the opening 414; when the button 44 is depressed to place the button 44 in the unlocked position, the projections 443 clear the edges of the opening 414, and when the button 44 is released, the spring element begins to return to its original shape and pushes the button 44 upwardly, whereupon the projections 443 move upwardly, and when the projections 443 contact and abut the edges of the opening 414, the button 44 returns to the locked position.

According to some embodiments of the present invention, a sliding groove 4204 is formed on one of the inner wall of the housing 41 and the lock member 42, and a sliding block 4305 is provided on the other of the inner wall of the housing 41 and the lock member 42, the sliding block 4305 being slidably fitted in the sliding groove 4204. Referring to fig. 3 and 4, the locking member 42 is provided with a slider 4305, and the inner wall of the housing 41 is provided with a sliding groove 4204, for example, both sides of the locking member 422 in the thickness direction (for example, the front-back direction in fig. 5) of the housing 41 may be provided with sliders 4305, each slider 4305 protrudes in the direction away from the center of the locking member 42, and the inner walls of the upper shell 411 and the lower shell 412 are provided with sliding grooves 4204 at positions opposite to the sliders 4305, respectively. When the button 44 is pressed, the sliding block 4305 on the locking piece 42 moves downwards along the sliding groove 4204; when the button 44 is released, the locking member 42 is reset by the restoring force of the spring member, and the slider 4305 on the locking member 42 moves upward along the sliding slot 4204 until the button 44 returns to the original position. Therefore, the sliding block 4305 and the sliding groove 4204 are arranged, so that the movement of the locking piece 42 is smoother, and the obstruction is reduced.

In some alternative embodiments, the adjustment device 4 further comprises a skid-proof piece 45. Anti-slip member 45 is disposed on locking member 42, and anti-slip member 45 is positioned between locking member 42 and bungee cord 1. As shown in fig. 6, anti-slip member 45 is disposed on a side of locking member 42 adjacent to bungee cord 1, and anti-slip member 45 is adapted to contact bungee cord 1 to generate friction. From this, the setting of antiskid 45 can prevent that stretch cord 1 from sliding when the locking, has strengthened the locking effect to stretch cord 1 to make stretch cord 1 can not take place to remove when chest expander 100 uses, guaranteed chest expander 100's safety in utilization.

According to some embodiments of the utility model, the inner wall of casing 41 has installation department 4111, and installation department 4111 includes first linkage segment 4113, second linkage segment 4114 and third linkage segment 4115 that link to each other, and the one end of spring member links to each other with second linkage segment 4114, and the spring member is located between first linkage segment 4113 and third linkage segment 4115, and the minimum distance between first linkage segment 4113 and third linkage segment 4115 is less than the width of locking piece 42 in the length direction of casing 41. For example, in the example of fig. 6, the mounting portion 4111 is provided on the upper housing 411, the mounting portion 4111 is located on a side of the lock member 42 away from the button 44, the mounting portion 4111 extends in a direction toward the lower housing 412, the mounting portion 4111 is generally U-shaped, an open side of the mounting portion 4111 faces the lock member 42, and the spring member is provided within the mounting portion 4111. Specifically, one side of the second connecting section 4114 adjacent to the spring element is provided with a cylindrical protrusion, and one end of the spring element, which is far away from the locking element 42, is sleeved on the protrusion to fix the spring element on the housing 41. When the locking member 42 is switched to the unlocking position, the locking member 42 abuts against the first connecting section 4113 and the third connecting section 4115 to prevent the spring member from being compressed too much to return to the initial state.

According to some embodiments of the present invention, one of the button 44 and the lock 42 is formed with a bayonet 4306, the other of the button 44 and the lock 42 is formed with a buckle 46, and the buckle 46 fits within the bayonet 4306. Wherein, a bayonet 4306 is formed on the button 44, and a buckle 46 is formed on the locking member 42 (as shown in fig. 6); alternatively, the button 44 may be provided with the catch 46, and the locking member 42 may be provided with the bayonet 4306 (not shown). Through bayonet 4306 and buckle 46's cooperation, can link to each other button 44 with locking piece 42, prevent when pressing button 44, locking piece 42 and button 44 break away from, and the connected mode is simple, and convenient operation can improve assembly efficiency.

According to some embodiments of the present invention, referring to fig. 10 and 11, the strain gauge 23 further includes a fixing portion 232 and an extending portion 233, the fixing portion 232 is formed with a through hole 2321 penetrating along a thickness direction of the fixing portion 232, the extending portion 233 is disposed in the through hole 2321, two ends of the extending portion 233 are respectively connected to a side wall of the through hole 2321, one end of the pulling portion 231 is connected to the extending portion 233, and the other end of the pulling portion 231 is spaced apart from the side wall of the through hole 2321.

For example, in the example of fig. 10 and 11, the extension 233 is located in the through hole 2321 and the outer circumferential side of the extension 233 and the sidewall of the through hole 2321 are spaced apart from each other, the one end of the pull-hook 231 is connected to the sidewall of the extension 233, and the other end of the pull-hook 231 extends in a direction away from the center of the extension 233. When a user applies pulling force to the traction assembly 3, the other end of the pulling part 231 deforms, meanwhile, the pulling part 231 drives the extension part 233 to deform correspondingly, the strain gauge 23 can convert the deformation of the strain gauge into corresponding electric signals and transmit the electric signals to the circuit board 22 of the chest expander 100, the circuit board 22 can correspondingly obtain the magnitude of the applied pulling force through the magnitude of the electric signals generated by the strain gauge 23, and correspondingly obtain the duration of the applied pulling force through the duration of the electric signals generated by the strain gauge 23, so that the calculation and analysis of heat are realized.

Further, the extension 233 includes a first extension 2331, a second extension 2332 and a third extension 2333 connected to each other, the extension 233 is n-shaped, and both ends of the extension 233 are connected to the same sidewall of the through-hole 2321. As shown in fig. 10 and 11, the first and third extensions 2331 and 2333 may each extend in a vertical direction (e.g., front-to-back direction in fig. 10), the second extension 2332 may extend in a horizontal direction (e.g., left-to-right direction in fig. 10), both ends of the second extension 2332 are connected to one ends of the first and third extensions 2331 and 2333, respectively, and the other ends of the first and third extensions 2331 and 2333 are connected to the side walls of the through-hole 2321 opposite to the second extension 2332, respectively. Therefore, the strain gauge 23 has a simple structure, the structural strength of the strain gauge 23 can be improved, and the strain gauge 23 can be prevented from being broken when a tensile force is applied.

Further, the same side wall and the extension 233 together define a mounting cavity, the pulling portion 231 is located in the mounting cavity, and the one end of the pulling portion 231 is connected to the side wall opposite to the same side wall. Referring to fig. 10 and 11, the one end of the pull-catch 231 may be connected to a middle portion of the second extension 2332, and the extension 233 is circumferentially disposed at an outer side of the pull-catch 231. For example, when the strain gauge 23 is applied to the chest expander 100, the pulling portion 231 is connected to the pulling assembly 3, the pulling force acts on the pulling portion 231, so that the other end of the pulling portion 231 is deformed, the extending portion 233 may be provided with a semiconductor material, the resistance of the semiconductor material is changed by the deformation, and a corresponding transformed electrical signal may be generated, and the electrical signal is filtered and amplified by the circuit board 22 to detect the magnitude of the pulling force and the acting time. The other end of the pulling portion 231 and the same side wall are spaced apart from each other. Therefore, when the pulling part 231 is pulled, the interference between the free end of the pulling part 231 and the side wall of the through hole 2321 can be avoided, the user can smoothly pull the traction assembly 3 of the chest expander 100, and the pulling force value can be accurately measured.

In some alternative embodiments, one side surface in the thickness direction of the fixing portion 232 is provided with a protruding portion 2322, and the protruding portion 2322 is located on one side of the fixing portion 232 adjacent to the open side of the extending portion 233. Specifically, referring to fig. 11, boss 2322 is substantially n-shaped, boss 2322 includes a first protruding segment 2323, a second protruding segment 2324 and a third protruding segment 2325 connected to each other, first protruding segment 2323 is parallel to third protruding segment 2325, first extending segment 2331 is parallel to third extending segment 2333, first protruding segment 2323 is opposite to first extending segment 2331, third protruding segment 2325 is opposite to third extending segment 233, and two ends of second protruding segment 2324 are connected to ends of first protruding segment 2323 and third protruding segment 2325 far from second extending segment 2332, respectively. With the arrangement, the structural strength of the strain gauge 23 can be further enhanced, and the strain gauge 23 is prevented from being broken when being subjected to large tensile force.

In some alternative embodiments, an escape opening 2326 for escaping the other end of the pulling portion 231 is formed on a side wall of the through hole 2321. Referring to fig. 10 and 11, the bypass opening 2326 is located between a connection of the first extension 2331 and a sidewall of the through-hole 2321 and a connection of the third extension 2333 and a sidewall of the through-hole 2321, and the bypass opening 2326 is arc-shaped and extends along a circumferential direction of a free end of the pull catch 231. Therefore, the free end of the pulling part 231 is spaced apart from the opposite side wall of the through hole 2321, and the distance between the free end of the pulling part 231 and the side wall is increased, so that the interference between the pulling part 231 and the side wall can be effectively avoided when the pulling part 231 deforms.

According to some embodiments of the present invention, the chest expander 100 further comprises a protection sleeve 7, the protection sleeve 7 wraps the outer peripheral surface of the elastic rope 1, and the protection sleeve 7 deforms along with the deformation of the elastic rope 1. It will be appreciated that when the bungee cord 1 is in a stretched state, the protective sleeve 7 is stretched as the bungee cord 1 is stretched, i.e., the protective sleeve 7 is also in a stretched state. The protective cover 7 may be a cloth having elasticity.

When using chest expander 100, two parts of bungee cord 1 receive the pulling force respectively, and under the effect of pulling force, bungee cord 1 is around establishing on wrapping post 4116, and the pulling force is big more, and the winding force of bungee cord 1 on wrapping post 4116 is big more to relative position is difficult to change between bungee cord 1 and wrapping post 4116, and wrapping post 4116 has the positioning action to bungee cord 1 this moment. It should be noted here that because protective sheath 7 wraps up in the periphery of bungee cord 1, protective sheath 7 is located between bungee cord 1 and wrapping post 4116, and at this moment, protective sheath 7 can increase the frictional force between bungee cord 1 and wrapping post 4116 to can make bungee cord 1 fixed for wrapping post 4116, thereby can promote adjusting device 4's length adjustment's stability, and then can promote chest expander 100's stability.

Further, as shown in fig. 13, the chest expander 100 further comprises a first socket 8 and a second socket 9, wherein the first socket 8 is used for fixing one end of the protecting case 7 with the one end of the elastic cord 1, and the second socket 9 is used for fixing the other end of the protecting case 7 with the other end of the elastic cord 1. In other words, the first sleeve 8 and the second sleeve 9 can be used to keep the relative positions of the bungee cord 1 and the protective sleeve 7 fixed, so that when the bungee cord 1 is stretched, the protective sleeve 7 is also stretched; when the elastic rope 1 is reset, the protective sleeve 7 is reset along with the elastic rope.

To increase the friction between the sock 7 and the bungee cord 1, the outer perimeter of the winding posts 4116 is roughened. Thereby increasing the friction between the sock 7 and the winding post 4116.

In some alternative embodiments, the material of the protective sheath 7 may be spandex and high-elastic polyester, for example, the protective sheath 7 may be made of 40% polyester plus 60% spandex. But is not limited thereto.

According to the utility model discloses a some embodiments, as shown in fig. 5, the wire passing channel has in the casing 41, and the wire passing channel can include the straightway and widen the section, and the straightway extends along the straight line, and the straightway with widen the section intercommunication, widen the minimum width of section and be wider than the maximum width of straightway, in the wide section was located to wrapping post 4116. It should be noted that the straight line segment may define the direction of the elastic cord 1 inside the casing 41; widen the section when the stretch cord 1 is around locating on wrapping post 4116, stretch cord 1 need occupy great space, widen the section and can be used for accommodating stretch cord 1 of winding on wrapping post 4116 to be convenient for adjust the relative position of casing 41 and stretch cord 1. Further, for convenience of adjustment, bungee cord 1 may be wrapped around one turn when bungee cord 1 is wrapped around winding post 4116.

As shown in fig. 2 and 5, to facilitate installation of bungee cord 1 inside housing 41, in some embodiments, housing 41 may include an upper shell 411 and a lower shell 412. One end of the winding post 4116 is connected to the lower housing 412, the upper housing 411 has a positioning groove 424 therein, and the other end of the winding post 4116 is located in the positioning groove 424. It should be noted that, through setting up constant head tank 424 to with wrapping post 4116's free end setting in constant head tank 424, on the one hand, can utilize constant head tank 424 to carry on spacingly to wrapping post 4116, on the other hand, can also utilize the cell wall of constant head tank 424 to support wrapping post 4116, prevent that wrapping post 4116 from appearing phenomenon such as slope, bending when receiving the pulling force of bungee 1.

To facilitate fixing the upper and lower cases 411 and 412 together, in some embodiments, as shown in fig. 5, the lower case 412 has screw posts extending toward the upper case 411, and screws are threaded through the upper case 411 and then coupled with the screw posts, so that the upper and lower cases 411 and 412 can be assembled together. Whereby the upper case 411 and the lower case 412 can be fixed using screws. In order to facilitate the fixing of the screws, screw posts may be provided on the lower case 412, so that the screws may be fixed using the screw posts.

It should be noted that the fixing manner of the upper shell 411 and the lower shell 412 is not limited thereto, as long as the upper shell 411 and the lower shell 412 can be fixedly connected together, for example, in some examples, the upper shell 411 has a first clamping portion, the lower shell 412 has a second clamping portion, the first clamping portion is clamped with the second clamping portion, one of the first clamping portion and the second clamping portion is a clamping groove, and the other is a clamping hook. Further, first joint portion and second joint portion all can be a plurality of, and a plurality of first joint portion 1 and a plurality of second joint portion one-to-one joint.

According to some embodiments of the present invention, as shown in fig. 13, the housing 24 includes a connecting shell 241 and a protective shell 242, the connecting shell 241 is connected to the protective shell 242, the connecting shell 241 is connected to one end of the elastic cord 1, and the circuit board 22, the power supply 21 and the strain gauge 23 are all disposed in the protective shell 242. Therefore, interference between the parts in the connection shell 241 and the inside of the protection shell 242 is avoided, and meanwhile, when the parts in the protection shell 242 are detached and maintained, the parts in the connection shell 241 are not affected, so that the whole service life of the chest expander 100 can be prolonged.

As shown in fig. 17, the protective shell 242 has a first cavity 2421 and a second cavity 2422 therein, the power element 21 and the circuit board 22 are located in the first cavity 2421, the strain gauge 23 is located in the second cavity 2422, and a support rib 2423 is located in the second cavity 2422, and the support rib 2423 is used for supporting the strain gauge 23. Therefore, the assembling stability of the strain gauge 23 can be improved, and the detection accuracy of the strain gauge 23 can be improved.

In order to connect the protective case 242 and the connection case 241 together, in the example shown in fig. 14, the connection case 241 has a protrusion 2411 toward the end of the protective case 242, the protective case 242 has a groove 2425 toward the end of the connection case 241, and when the connection case 241 is rotatably fastened to the protective case 242, the protrusion 2411 is rotatably fastened to the groove 2425 along with the connection case 241. It is understood that the protrusion 2411 may extend in a direction of the rotational fastening of the protective case 242, and when the connection case 241 is mounted to the protective case 242, the protrusion 2411 rotates into the groove 2425 while the connection case 241 rotates with respect to the protective case 242. When the protrusion 2411 is fitted with the groove 2425, the connection case 241 is completely assembled with the protection case 242.

Further, in order to prevent the protrusion 2411 from separating from the groove body 2425, as shown in fig. 15 and 16, the free end of the protrusion 2411 is provided with a limiting groove 2412, the inner bottom wall of the groove body 2425 is provided with a limiting convex strip 2424, and the limiting convex strip 2424 is embedded in the limiting groove 2412. From this, through with spacing sand grip 2424 joint in spacing groove 2412, can inject protrusion 2411 in cell body 2425 steadily to can promote the assembly stability of connecting shell 241 and protective housing 242, prevent to connect shell 241 and protective housing 242 because of unexpected breaking away from.

As shown in fig. 19 to 21, according to some embodiments of the present invention, the housing 41 has a positioning portion 4310 in the accommodating cavity, the chest expander 100 further includes a partition 10, the partition 10 is connected to the periphery of the other end of the elastic cord 1 and is disposed in the positioning portion 4310, and the partition 10 separates the other end of the elastic cord 1 from the positioning portion 4310, so that the other end of the elastic cord 1 can rotate freely. For example, the positioning portion 4310 is disposed in the accommodating cavity, the partition 10 separates one end of the elastic cord 1 from the positioning portion 4310 to ensure that the other end of the elastic cord 1 can rotate freely, and one end of the elastic cord 1 is installed in the sensor device 2. For example, the positioning portion 4310 may be a structure for installation or positioning, or the positioning portion 4310 may be a cavity for accommodating the end of the elastic cord 1, and the like, which is not limited herein.

The adjusting device 4 has a hollow structure for the elastic rope 1 to penetrate through. However, if the elastic rope 1 directly contacts with the adjusting device 4, when a user applies pulling force, the end portion of the elastic rope 1 is stretched, and is easily deformed to thin the end portion, at this time, the end portion of the elastic rope 1 is easily separated from the adjusting device 4 or the end portion of the elastic rope 1 is easily clamped in a hollow-out structure position, and the elastic rope 1 cannot freely rotate under both conditions, so that user experience is affected.

According to the utility model discloses chest expander 100, through setting up separator 10, separator 10 can be spaced apart above-mentioned tip and location portion 4310 of stretch cord 1, when the user uses chest expander 100, separator 10 can not be because of receiving the effort deformation, thereby can not break away from adjusting device 4 or block on adjusting device 4 because of deformation, connect in the one end periphery of stretch cord 1 because of separator 10, under separator 10's effect, can make stretch cord 1 not break away from or block on adjusting device 4 by the tensile attenuation when receiving the effort, with the installation reliability of guaranteeing the above-mentioned tip of stretch cord 1, and can guarantee that the above-mentioned tip of stretch cord 1 can the free rotation, the body-building effect has been guaranteed, user experience has been improved.

Further, as shown in fig. 19, the partitioning member 10 may have a ring shape, and thus, the effect of the partitioning member 10 on the spacing between the elastic cord 1 and the adjusting means 4 may be improved. Here, the ring shape may be a circular ring shape, a square ring shape, or the like, and is not limited thereto. The partition 10 is fitted around the other end of the elastic cord 1. For example, the end of the elastic string 1 may be inserted through the partition 10. The cross-sectional area of the end of the elastic cord 1 extending beyond the partition 10 may be greater than the cross-sectional area of the other end of the elastic cord 1 to ensure that the elastic cord 1 and the partition 10 do not separate when acted upon by an applied force, thereby improving the reliability of the installation of the two, and further ensuring that the elastic cord 1 can rotate freely

In some embodiments, the positioning portion 4310 may be an installation cavity, a second notch 441 is formed on a cavity wall of the installation cavity, the second notch is used for passing through one end of the elastic cord 1, at least one abutting portion 4131 is arranged in the installation cavity, the at least one abutting portion 4131 is arranged at least one end of the second notch 441, and after one end of the elastic cord 1 passes through the second notch 441, the separator 10 abuts against the abutting portion 4131 for limiting. For example, an end of the separator 10 facing the second notch 441 may abut against the abutting portion 4131, or an end of the separator 10 away from the second notch 441 may abut against the abutting portion 4131, which is not limited herein. For example, the abutting portion 4131 may be disposed at an edge of the second notch 441 to enhance the structural reliability of the second notch 441, and the abutting portion 4131 may be an annular structure, which may be a circular ring or a strip, which is not limited herein.

Further, as shown in fig. 20, there may be two stopping portions 4131, and the two stopping portions 4131 may be respectively disposed at two opposite ends of the second notch 441. Thus, the two abutting portions 4131 simultaneously limit the position of the separator 10 at the opposite ends of the second notch 441, thereby preventing the separator 10 from falling off from the second notch 441 and enhancing the stability of the attachment of the separator 10 to the adjustment device 4.

In some alternative embodiments, as shown in fig. 20, each of the abutting portions 4131 may have a guide surface 4132 adapted to engage the partitioning member 10, and the partitioning member 10 may abut on the guide surface 4132. By providing the guide surface 4132, the contact area between the separator 10 and the abutting portion 4131 can be reduced, the friction between the two can be prevented from being large, and the service life of the separator 10 can be improved. Meanwhile, the partitioning member 10 can be prevented from abutting against the guide surface 4132, so that the movement of the partitioning member 10 and the adjusting device 4 is prevented from being large, the friction force therebetween is reduced, the service life is further prolonged, and in addition, the partitioning member 10 is prevented from being removed because the partitioning member 10 is not easily deformed.

Further, the guide surface 4132 is configured as a slope surface extending in a direction toward the end surface of the one end of the elastic cord 1 and gradually inclining from both ends of the second notch 441 to both sides, whereby the one end of the elastic cord 1 can be guided by the guide surface 4132, the installation of the elastic cord 1 and the adjusting device 4 is facilitated, and the partitioning member 10 does not come off. For example, the partitioning member 10 may include a first section and a second section connected in the extending direction of the bungee cord 1, the first section protrudes out of the second section in the circumferential direction of the partitioning member 10, the second section may be connected to a side of the first section facing the second notch 441, the first section may abut against the guide surface 4132, and the second section may be spaced apart from the guide surface 4132 to reduce the contact area of the partitioning member 10 and the abutting portion 4131.

For example, the guide surface 4132 may be configured as a flat surface, or the guide surface 4132 may be configured as a curved surface, but not limited thereto, and the guide surface 4132 may be configured as a curved surface, and the guide surface 4132 may be fitted to the outer circumferential wall of the partitioning member 10.

In some optional embodiments, the partition 10 and the positioning portion 4310 may be in interference fit, so that the partition 10 may be prevented from being blocked on the positioning element and being unable to be reset when a user applies force to the elastic cord 1, thereby facilitating free rotation of the elastic cord 1 and further ensuring a fitness effect.

In some embodiments, the separator 10 is a hard plastic or hard rubber. From this, separator 10 has higher structural strength and rigidity, can effectively guarantee that separator 10 can not be because of receiving effort and deformation to can not break away from adjusting device 4 or block on adjusting device 4 because of deformation, with the tip of guaranteeing elastic cord 1 can the free rotation, with improvement user experience. For example, the separator 10 may be a POM (Polyoxymethylene) member, and the POM member has good structural strength and rigidity and is not easily deformed, so that the POM member may not be easily separated from the adjustment device 4 or clamped on the adjustment device 4, and the elastic cord 1 may be ensured to rotate freely.

According to other embodiments of the present invention, the other end of the bungee cord 1 has protrusions 11, the protrusions 11 extending along the circumference of the bungee cord 1. With this arrangement, the end of the elastic cord 1 can be securely mounted in the positioning portion 4310 in the housing 41, and the end of the elastic cord 1 can be prevented from coming off the housing 41 when the elastic cord 1 is pulled.

According to some embodiments of the present invention, as shown in fig. 2, each of the traction assemblies 3 includes a connection bridge 31 and a hook 32 connected to each other, and one end of the connection bridge 31 of one of the plurality of traction assemblies 3 is connected to the pulling portion 231. The chest expander 100 further comprises a wrist strap 20 and an ankle strap 30, the wrist strap 20 and the ankle strap 30 being connected to a plurality of hooks 32, respectively. Wherein, when the user uses the chest expander 100, the wrist band 20 and the ankle band 30 can be tied up on the hand and the foot of the user, which is convenient for the user to stretch the chest expander 100 and can ensure the body-building effect at the same time.

According to some embodiments of the utility model, sensor device 2 still includes shell 24 and display screen 25, and shell 24 has the installation cavity, and power supply unit 21, circuit board 22 and foil gage 23 all establish in the installation cavity, are equipped with control chip on the circuit board 22. The display screen 25 is arranged on the shell 24, and the display screen 25 is in communication connection with the control chip. Specifically, the control chip may be configured to receive an electrical signal generated by deformation of the strain gauge 23, detect and analyze the received electrical signal, and the display screen 25 may be configured to receive the signal of the control chip and convert the signal into data to be displayed on the display screen 25. For example, a pulling force value, training times, training time, calories consumed, etc. may be displayed on the display screen 25 to enhance the user experience. In addition, the display control function can be realized through the control chip, for example, a key 44 can be arranged on the display screen 25, and a user can realize the functions of clearing data, switching display modes or switching screens by operating the key 44. Or, the display screen 25 may have a touch screen function, and may directly implement functions such as data clearing, display mode switching, or screen switching through touch screen operations.

Further, the sensor device 2 also comprises a heart rate sensor, which is arranged within the housing 24. For example, circuit board 22 can include motion detection circuit, heart rate detection circuit and communication processing circuit, motion detection circuit and heart rate detection circuit can real-time detection current user's motion state and heart rate, and transmit the motion data who detects to communication processing circuit and handle, data after the communication processing circuit handles can be sent to on the display screen 25, the user can see heart-movement induction index through display screen 25, overload motion monitoring, training pressure, fatigue degree, average heart rate, maximum heart rate and low heart rate are reminded etc. can further promote user's experience.

In some alternative embodiments, a bluetooth chip is disposed on the circuit board 22, and the bluetooth chip is used for driving the backlight circuit and supplying power to the display screen 25. With the arrangement, the user can see the display content on the display screen 25 clearly when the user moves at night.

Of course, the present invention is not limited thereto, and in other alternative embodiments, the exercise apparatus is adapted to be communicatively coupled to an external electronic device via a bluetooth chip. The bluetooth chip can send the data that circuit board 22 calculated to user's external electronic equipment to make external electronic equipment update or read data, make things convenient for the user to carry out statistics arrangement to data, so that the user can arrange the motion plan better, realize intelligent motion.

Further, the sensor device 2 further comprises a speaker 26, the speaker 26 being provided within the housing 24. For example, the speaker 26 and the power supply member 21 may be respectively located on both sides in the thickness direction of the circuit board 22. By arranging the loudspeaker 26, corresponding prompt tones can be emitted when the user starts training and finishes training, so that the concentration of the user is improved, and the safety of the user in use is ensured. In addition, when the body builder detects that the heart rate of the user is abnormal, the body builder can send out prompt tones through the loudspeaker 26 so as to achieve the function early warning of the heart rate and effectively guarantee the personal safety of the user.

In some alternative embodiments, the control assembly further includes a vibration motor (not shown) disposed within the housing 24. By arranging the vibration motor, vibration can be generated when the user starts training and finishes training so as to improve the concentration force of the user and further ensure the safety of the user during use. In addition, when the body builder detects that the heart rate of the user is abnormal, the body builder can generate vibration through the vibration motor to achieve the function early warning of the heart rate, and the personal safety of the user can be effectively guaranteed.

According to some embodiments of the present invention, the circuit board 22 is provided with a control switch 27 and a charging socket 28, the control switch 27 is electrically connected to the circuit board 22 and is disposed on one side of the width direction (e.g., the front-back direction in fig. 8) of the circuit board 22, and the control switch 27 is embedded in the housing 24, and the control switch 27 can be used to control the operating state of the circuit board 22. A charging jack 28 may be provided on the other side in the width direction of the circuit board 22, and also the charging jack 28 is embedded in the housing 24, the charging jack 28 being electrically connected to the power supply member 21 for performing a charging operation on the power supply member 21.

Other constructions and operations of the chest expander 100 according to embodiments of the present invention are known to those skilled in the art and will not be described in detail herein.

In the description of the present invention, it is to be understood that the terms "center", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "circumferential", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and to simplify the description, but do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the present invention.

In the description of the present application, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present application can be understood in a specific case by those of ordinary skill in the art.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an illustrative embodiment," "an example," "a specific example," or "some examples" or the like mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example.

While embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims (19)

1. A chest expander, comprising:

a bungee cord having elasticity;

the sensor device is arranged at one end of the elastic rope and comprises a power supply part, a circuit board and a strain gauge, the power supply part and the strain gauge are respectively and electrically connected with the circuit board, and the strain gauge comprises a pulling part;

a plurality of traction assemblies, wherein one end of one of the traction assemblies is connected with the pulling part;

the adjusting device comprises a shell, a locking piece and a winding post, wherein a key is arranged on the shell, part of the key is positioned in the shell, the locking piece and the winding post are both positioned in the shell, the locking piece is connected with the key, the locking piece is switched between a locking position and an unlocking position, one end of the elastic rope penetrates into the shell and winds around the winding post and then penetrates out of the shell;

when the locking piece is located at the unlocking position, the elastic rope can slide relative to the adjusting device so as to adjust the length of the elastic rope, and when the locking piece is located at the locking position, the elastic rope is clamped in the adjusting device.

2. The chest expander of claim 1, wherein said latch member is disposed about said bungee cord, said latch member being coupled to said housing by a reset member, said reset member providing a restoring force for switching said latch member from said unlatched position to said latched position;

when the locking piece is located at the unlocking position, the locking piece compresses the resetting piece and the elastic rope is separated from the locking piece so as to adjust the length of the elastic rope, and when the locking piece is located at the locking position, the elastic rope is clamped on the locking piece.

3. A chest expander according to claim 2, wherein said housing comprises an upper casing and a lower casing which are snap-fitted to each other, at least one of said upper casing and said lower casing having formed thereon at least one first stopper post extending in a direction toward the center of said housing,

when the locking piece is located at the locking position, the elastic rope is clamped between the locking piece and the first limiting column.

4. A chest expander according to claim 3, wherein said first restraint posts are provided with stop portions extending obliquely in a direction toward the center of said housing.

5. A chest expander according to claim 3, wherein said push button is formed with at least one notch at the edge of each end in the extending direction of said first restraint post, said notch engaging said first restraint post when said lock member is in said unlocked position.

6. A chest expander as claimed in claim 5, wherein said housing defines an opening, said locking member is disposed at said opening, and a ledge is disposed on an edge of said button, said ledge abutting an edge of said opening when said locking member is in said locked position.

7. The chest expander of claim 1, wherein said strain gage further comprises:

a fixing portion having a through hole formed therethrough in a thickness direction of the fixing portion;

the extension part is arranged in the through hole, two ends of the extension part are respectively connected with the side wall of the through hole,

one end of the pulling part is connected with the extending part, and the other end of the pulling part is spaced from the side wall of the through hole.

8. The chest expander of claim 7, wherein said extension comprises a first extension segment, a second extension segment and a third extension segment connected to each other, said extension is n-shaped, and both ends of said extension are connected to the same sidewall of said through hole.

9. The chest expander according to claim 7, wherein a thickness direction one side surface of said fixing portion is provided with a convex portion, said convex portion being located on a side of said fixing portion adjacent to an open side of said extending portion.

10. The chest expander of claim 1, further comprising:

the protective sleeve wraps the outer peripheral face of the elastic rope, and deforms along with deformation of the elastic rope.

11. A chest expander as claimed in claim 10 further comprising a first socket for securing one end of said protective sleeve to said one end of said bungee cord and a second socket for securing the other end of said protective sleeve to the other end of said bungee cord.

12. A chest expander according to claim 11, wherein the outer peripheral wall of said winding post is roughened.

13. A chest expander according to claim 1, wherein said housing has a mounting portion in a receiving cavity thereof,

the chest expander further comprises:

the separator, the separator is connected the other end periphery of stretch cord just locates in the installation department, the separator will the stretch cord the other end with the installation department is spaced apart, so that the stretch cord the other end can the free rotation.

14. A chest expander as claimed in claim 13, wherein said spacer is annular and fits around the periphery of said other end of said bungee cord.

15. A chest expander as claimed in claim 1, wherein the other end of said bungee cord has a protrusion extending circumferentially of said bungee cord.

16. A chest expander according to any one of claims 1 to 15, wherein each of said traction assemblies comprises a connecting bridge and a hook connected to each other, one end of said connecting bridge of said one of said plurality of said traction assemblies being connected to said pull catch;

the chest expander still includes wrist area and ankle area, the wrist area with the ankle area is respectively with a plurality of the couple links to each other.

17. A chest expander as claimed in any one of claims 1 to 15, wherein said sensor means further comprises:

the shell is provided with an installation cavity, the power supply part, the circuit board and the strain gauge are arranged in the installation cavity, and the circuit board is provided with a control chip;

the display screen is arranged on the shell and is in communication connection with the control chip.

18. The chest expander of claim 17, wherein said sensor means further comprises:

a heart rate sensor disposed within the housing.

19. The chest expander of claim 17, wherein said sensor means further comprises:

a speaker disposed within the housing.

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