Chest expander with adjustable resistance value

Abstract

The utility model discloses a chest expander with an adjustable resistance value. The chest expander comprises a handle, an elastic band and a safety lock catch. The handle is provided with a first connecting part and a second connecting part, the first connecting part is provided with a limiting mounting groove, the elastic band is provided with a limiting connector, and the limiting connector is contained in the limiting mounting groove; the safety lock catch is arranged on the outer side of the first connecting part in a sleeving mode and detachably connected with the second connecting part, and the elastic band is detachably locked to the handle through the safety lock catch and the limiting installation groove. The limiting connector is arranged in the limiting mounting groove, the first connecting part is sleeved with the safety lock catch, and when the safety lock catch is detached from the handle, the limiting connector of the elastic band can be taken out of the limiting mounting groove, so that the elastic band is separated from the handle to reduce the resistance value of the chest expander; the resistance value of the chest expander can be adjusted by replacing the elastic band with one resistance value or replacing the elastic band with another resistance value, the single elastic band can be adjusted and replaced respectively, overall adjustment is convenient, and the other elastic bands cannot be affected.

Description

TECHNICAL FIELD

[0001] The utility model relates to body -building equipment technical field especially, a resistance adjustable chest expander. BACKGROUND

[0002] The chest expander is a kind of body-building auxiliary equipment with higher use frequency in body-building equipment, and the chest expander can comprehensively exercise each muscle group of body by stretching and contracting action, such as biceps brachii and triceps brachii of arm, latissimus dorsi of back, pectoral muscle and leg muscle, to enhance the coordination and balance ability of body.In addition, the chest expander also has remarkable effect in slimming and bodybuilding, promotes fat burning by slow stretching action, helps to shape perfect figure.It can also promote bone metabolism, make bone more solid, prevent and treat osteoporosis.Using the chest expander can also improve the coordination of body, increase joint flexibility, enhance reaction ability and relieve stress.

[0003] The resistance of existing chest expander is adjusted by increasing or reducing the number of elastic bands, and the patent document with application No.2016209507459 discloses a five-head chest expander (as shown in Figure 1 Fixed groove 14 is arranged in lower fixed end 13, elastic rope is arranged in fixed groove 14, upper fixed end 6 is buckled with lower fixed end 13, and the elastic rope is fixed.In actual use process, when it is needed to increase or reduce a single elastic rope, the whole upper fixed end 6 and lower fixed end 13 need to be opened, and the operation is inconvenient, and the remaining elastic ropes that do not need to be replaced are also easy to fall off in the whole process, increasing the complexity of replacement. UTILITY MODEL CONTENT

[0004] The utility model provides a resistance adjustable chest expander in view of the above problems.

[0005] The technical scheme adopted by the utility model is as follows:

[0006] The application provides a resistance adjustable chest expander, which comprises a handle, an elastic band and a safety lock buckle.

[0007] The handle is provided with a first connecting part and a second connecting part correspondingly, the first connecting part is provided with a limiting installation slot, the elastic band is provided with a limiting connector, and the limiting connector is accommodated in the limiting installation slot.

[0008] The safety lock buckle is arranged on the outer side of the first connecting part and detachably connected with the second connecting part, and the safety lock buckle and the limiting installation slot detachably lock the elastic band on the handle.

[0009] The limiting connector of the elastic band is arranged in the limiting installation slot, and the safety lock buckle is arranged outside the first connecting part, so that the elastic band is detachably installed on the handle together with the limiting installation slot. When the safety lock buckle is detached from the handle, the limiting connector of the elastic band can be taken out from the limiting installation slot, so that the elastic band is separated from the handle to reduce the resistance value of the tensioner, or another elastic band with a different resistance value is replaced, so that the resistance value of the tensioner is adjusted, and the single elastic band can be adjusted and replaced, so that the overall adjustment is convenient and does not affect the remaining elastic bands.

[0010] Further, the limiting installation slot has a slot body and first and second slot openings connected with the slot body respectively, the slot body is used for accommodating the limiting connector, the first slot opening is used for the body of the elastic band to pass out, and the second slot opening is used for the limiting connector to be taken out from the slot body;

[0011] The inner side wall of the safety lock buckle has a limiting plate, and the limiting plate is used for covering the second slot opening to prevent the limiting connector from being taken out from the slot body;

[0012] When the limiting plate covers the second slot opening, the limiting connector of the elastic band cannot be taken out from the slot body;

[0013] When the safety lock buckle is detached from the handle, the limiting connector of the elastic band can be taken out from the second slot opening.

[0014] By arranging the limiting plate on the safety lock buckle and the second slot opening for the limiting connector of the elastic band to be taken out on the limiting installation slot, and matching the limiting plate with the second slot opening, the locking of the limiting connector is realized, so that the elastic band is replaced. The lock buckle structure provided by the application is simple and firm, and is convenient for the user of the tensioner to replace during use.

[0015] Further, the caliber of the second slot opening is greater than that of the first slot opening, and the outer diameter of the limiting connector is greater than the caliber of the first slot opening when the elastic band is stretched.

[0016] In one embodiment, the limiting connector has a spherical structure.

[0017] Further, the elastic band further comprises a connecting section for connecting the limiting connector and the body of the elastic band, and the radial dimension of the connecting section is smaller than that of the limiting connector. The connecting section of the elastic band is clamped on the first slot opening.

[0018] Further, the handle is provided with a limiting spring, the safety lock buckle is provided with a limiting block, or the handle is provided with a limiting block, and the safety lock buckle is provided with a limiting spring, the limiting spring has a clamping groove, the clamping groove is matched with the limiting block, and the safety lock buckle is clamped on the handle.

[0019] Furthermore, a limiting block is provided on the safety lock, and the limiting block has a first guide slope and a second guide slope. The first guide slope and the second guide slope are arranged opposite to each other, and the first guide slope is provided on the side of the limiting block facing the elastic band, while the second guide slope is provided on the side of the limiting block facing away from the elastic band.

[0020] The limiting spring has a third guide slope and a fourth guide slope. The third guide slope and the fourth guide slope are located on the groove of the slot near the elastic band and are arranged in opposite directions. The third guide slope is located on the side of the limiting spring facing the elastic band, and the fourth guide slope is located on the side of the limiting spring away from the elastic band.

[0021] When the safety lock is installed on the handle, the second guide ramp and the third guide ramp cooperate to move the safety lock to one side of the handle, and the first guide ramp and the fourth guide ramp cooperate to lock the safety lock on the handle.

[0022] When removing the safety lock from the handle, the first guide ramp engages with the fourth guide ramp to help disengage the safety lock from the handle.

[0023] Furthermore, the handle has a plurality of first connecting parts, which are spaced apart from each other, and the plurality of first connecting parts are used to connect to a plurality of elastic bands respectively.

[0024] The training resistance of the resistance band can be adjusted by increasing or decreasing the number of resistance bands or by replacing them with resistance bands of different resistance values.

[0025] Furthermore, the handle includes a housing, a floating plate, and a resilient reset button;

[0026] The housing has an installation space;

[0027] The first connecting portion is formed on the floating plate, and the second connecting portion is formed on the shell.

[0028] The floating plate is set in the installation space, and one end of the elastic reset key is fixed to the housing, while the other end is connected to the floating plate.

[0029] When the floating plate moves away from the installation space under the tension of the elastic band, the elastic reset button is in the stretched state. When the tension of the elastic band is released, the elastic reset button is used to reset the floating plate.

[0030] Furthermore, the floating plate includes a plate body and a support plate connected to the plate body, and the first connecting portion is formed on the support plate;

[0031] The housing includes a housing body and a support shell disposed on the housing body, and the second connecting portion is disposed on the support shell.

[0032] The support shell has a telescopic channel that connects to the installation space.

[0033] The support plate is movably mounted on the telescopic channel, and the first connecting part extends out of the telescopic channel.

[0034] By respectively setting the first connecting part and the second connecting part on the floating plate and the shell, the floating plate moves as the elastic band is stretched and cooperates with the counting component, so that the present application also has a counting function.

[0035] Furthermore, a limiting spring is mounted on the support housing.

[0036] Furthermore, the housing includes an upper shell and a lower shell, which are fastened together to form the aforementioned installation space. Limiting springs are provided on both the upper and lower shells, and limiting blocks are provided on the two opposite sides of the safety lock.

[0037] Furthermore, the floating plate is provided with a limiting hole, and a limiting post is fixed on the shell. The limiting post cooperates with the limiting hole to prevent the floating plate from floating excessively, and there is an movable gap between the limiting post and the limiting hole.

[0038] The limiting hole and limiting post work together to prevent the floating plate from floating excessively as the elastic band stretches, which could cause the detection part on the floating plate to excessively compress the pressing contact, damaging the pressing contact or the counting component. At the same time, the size of the movement gap is adapted to the size of the detection part and the pressing contact.

[0039] Furthermore, it also includes a counting component, wherein the floating plate has a detection unit, which is used to cooperate with the counting component to achieve counting.

[0040] Furthermore, the counting component includes a counting chip and a pressing contact electrically connected to the counting chip;

[0041] The pressing contact is fixed on the housing. When the elastic band is stretched, the floating plate moves closer to the elastic band, and the detection part presses against the pressing contact. When the elastic band is unstretched, the floating plate moves away from the elastic band under the action of the elastic reset key, and the detection part stops pressing against the pressing contact, thus realizing one press count.

[0042] Alternatively, the pressing contact is fixed on the detection unit, and a stop is fixed on the housing. When the elastic band is stretched, the pressing contact moves with the floating plate and cooperates with the stop to realize pressing count.

[0043] Furthermore, the counting component also includes a display screen, which is electrically connected to the counting chip. The display screen is mounted on the housing and is used to display the counting information.

[0044] The beneficial effects of this utility model are:

[0045] (1) In this application, the limiting connector of the elastic band is set in the limiting mounting groove, and a safety buckle is provided on the outside of the first connecting part so that the elastic band can be detachably installed on the handle together with the limiting mounting groove. When the safety buckle is removed from the handle, the limiting connector of the elastic band can be taken out from the limiting mounting groove, so that the elastic band is separated from the handle to reduce the resistance of the tensioner, or a different elastic band with a different resistance value can be replaced, so that the resistance of the tensioner can be adjusted. Moreover, individual elastic bands can be adjusted and replaced separately, and the overall adjustment is convenient and will not affect the other elastic bands.

[0046] (2) By setting a limiting plate on the safety lock and a second slot on the limiting mounting groove for the limiting connector of the elastic band to disengage, and by having the limiting plate cooperate with the second slot, the limiting connector is locked, so as to facilitate the replacement of the elastic band. The lock structure provided in this application is simple and the locking is firm, which facilitates the replacement operation of the tensioner user during use.

[0047] (3) By setting the first connecting part and the second connecting part on the floating plate and the shell respectively, the floating plate moves as the elastic band is stretched and cooperates with the counting component, so that the present application also has a counting function. Attached Figure Description

[0048] Figure 1 This is a schematic diagram of the installation structure of elastic rope in the prior art;

[0049] Figure 2 This is a schematic diagram of the axonal structure of the tensioner according to an embodiment of the present invention (partial exploded view) (a safety lock is hidden);

[0050] Figure 3 yes Figure 2 A magnified schematic diagram of the structure of part A in the diagram;

[0051] Figure 4 yes Figure 2 A magnified schematic diagram of the partial structure of B in the diagram;

[0052] Figure 5 This is a schematic diagram of the axonal structure of the tensioner according to an embodiment of the present invention (concealing a safety lock and lower shell);

[0053] Figure 6 yes Figure 5 A magnified schematic diagram of the structure of C in the middle;

[0054] Figure 7 This is a schematic diagram of the axial structure of the floating plate according to an embodiment of the present invention;

[0055] Figure 8This is a schematic diagram of the axial structure of the lower shell according to an embodiment of the present invention;

[0056] Figure 9 This is a schematic diagram of the axial structure of the safety lock according to an embodiment of the present invention.

[0057] The labels for the attached figures are as follows:

[0058] 10. Handle; 101. First connecting part; 102. Second connecting part; 103. Limiting mounting groove; 1031. Groove body; 1032. First groove opening; 1033. Second groove opening; 104. Limiting spring; 1041. Slot; 1042. Third guide slope; 1043. Fourth guide slope; 105. Retaining ring; 110. Housing; 111. Installation space; 112. Telescopic channel; 113. Support shell; 114. Limiting post; 115. 116. Upper shell; 120. Lower shell; 121. Floating plate; 122. Support plate; 123. Limiting hole; 124. Detection unit; 130. Elastic reset button; 140. Counting component; 141. Counting chip; 142. Pressing contact; 143. Display screen; 20. Elastic band; 210. Limiting connector; 220. Connecting section; 30. Safety lock; 310. Limiting plate; 320. Limiting block; 321. First guide slope; 322. Second guide slope. Detailed Implementation

[0059] The present invention will now be described in detail with reference to the accompanying drawings.

[0060] like Figures 2-9 As shown, this application provides a resistance adjustable tensioner, including a handle 10, an elastic band 20, and a safety lock 30;

[0061] The handle 10 has a first connecting part 101 and a second connecting part 102 respectively. The first connecting part 101 has a limiting mounting groove 103. The elastic band 20 has a limiting connector 210, which is accommodated in the limiting mounting groove 103.

[0062] The safety buckle 30 is sleeved on the outside of the first connecting part 101 and is detachably connected to the second connecting part 102. The safety buckle 30 and the limiting mounting groove 103 together detachably lock the elastic band 20 onto the handle 10.

[0063] In this application, the limiting connector 210 of the elastic band 20 is disposed within the limiting mounting groove 103, and a safety buckle 30 is sleeved on the outside of the first connecting part 101, so that the elastic band 20 is detachably installed on the handle 10 together with the limiting mounting groove 103. When the safety buckle 30 is removed from the handle 10, the limiting connector 210 of the elastic band 20 can be removed from the limiting mounting groove 103, so that the elastic band 20 is disengaged from the handle 10 to reduce the resistance of the tensioner, or a different elastic band 20 with a different resistance value can be replaced, thereby realizing the resistance adjustment of the tensioner. Moreover, individual elastic bands 20 can be adjusted and replaced separately, and the overall adjustment is convenient and will not affect the other elastic bands 20.

[0064] In this embodiment, the limiting installation groove 103 has a groove body 1031 and a first groove 1032 and a second groove 1033 respectively connected to the groove body 1031. The groove body 1031 is used to accommodate the limiting connector 210, the first groove 1032 is used for the body of the elastic band 20 to pass through, and the second groove 1033 is used for the limiting connector 210 to disengage from the groove body 1031.

[0065] The inner wall of the safety latch 30 has a limiting plate 310, which is used to cover the second slot 1033 to prevent the limiting joint 210 from coming out of the slot body 1031;

[0066] When the limiting plate 310 is closed with the second slot 1033, the limiting joint 210 of the elastic band 20 cannot be dislodged from the slot body 1031;

[0067] Remove the safety lock 30 from the handle 10, and the limit connector 210 of the elastic band 20 can be disengaged from the second slot 1033.

[0068] By setting a limiting plate 310 on the safety lock 30 and a second slot 1033 on the limiting mounting groove 103 for the limiting connector 210 of the elastic band 20 to disengage, and by engaging the limiting plate 310 with the second slot 1033, the limiting connector 210 is locked, thus facilitating the replacement of the elastic band 20. The lock structure provided in this application is simple and secure, making it convenient for users of the tensioner to replace the band during use.

[0069] In this embodiment, the diameter of the second slot 1033 is larger than the diameter of the first slot 1032, and the outer diameter of the limiting joint 210 is larger than the diameter of the first slot 1032 when the elastic band 20 is stretched.

[0070] In this embodiment, the limiting joint 210 has a spherical structure.

[0071] In this embodiment, the elastic band 20 further includes a connecting section 220, which is used to connect the limiting joint 210 and the body of the elastic band 20. The radial dimension of the connecting section 220 is smaller than the radial dimension of the limiting joint 210. The connecting section 220 of the elastic band 20 is engaged with the first slot 1032.

[0072] In other embodiments, the first connecting portion 101 and the second connecting portion 102 can be configured as an integral structure. The second connecting portion 102 is located on the outer wall of the first connecting portion 101. The first connecting portion 101 includes multiple spring pieces arranged in a circular pattern and forming a limiting mounting groove 103 inside. The safety lock 30 is screwed onto the outer peripheral side wall of the first connecting portion 101 (i.e., the second connecting portion 102). When the safety lock 30 is tightened, the spring pieces are squeezed, the space of the limiting mounting groove 103 becomes smaller, and the opening of the limiting mounting groove 103 also becomes smaller. The limiting connector 210 is fastened in the limiting mounting groove 103 and cannot be dislodged from the limiting mounting groove 103. When the safety lock 30 is loosened, the space of the limiting mounting groove 103 becomes larger, and the opening of the limiting mounting groove 103 also becomes larger. The limiting connector 210 can be dislodged from the limiting mounting groove 103 through the opening of the limiting mounting groove 103.

[0073] In this embodiment, a limiting spring 104 is provided on the handle 10, and a limiting block 320 is provided on the safety lock 30. The limiting spring 104 has a slot 1041, which cooperates with the limiting block 320 to make the safety lock 30 engage with the handle 10.

[0074] In other embodiments, a limit stop 320 is provided on the handle 10, and a limit spring 104 is provided on the safety lock 30.

[0075] In this embodiment, the second connecting part 102 also has a retaining ring 105, which is used to prevent the safety lock 30 from moving excessively. The retaining ring 105 is the body wall of the slot 1041 away from the elastic band 20.

[0076] In this embodiment, the limiting block 320 is disposed on the safety lock 30. The limiting block 320 has a first guide slope 321 and a second guide slope 322. The first guide slope 321 and the second guide slope 322 are disposed opposite to each other. The first guide slope 321 is disposed on the side of the limiting block 320 facing the elastic band 20, and the second guide slope 322 is disposed on the side of the limiting block 320 away from the elastic band 20.

[0077] The limiting spring 104 has a third guide slope 1042 and a fourth guide slope 1043. The third guide slope 1042 and the fourth guide slope 1043 are located on the groove of the slot 1041 near the elastic band 20 and are arranged in opposite directions. The third guide slope 1042 is located on the side of the limiting spring 104 facing the elastic band 20, and the fourth guide slope 1043 is located on the side of the limiting spring 104 away from the elastic band 20.

[0078] When the safety latch 30 is installed on the handle 10, the second guide ramp 322 and the third guide ramp 1042 cooperate to move the safety latch 30 to one side of the handle 10. During the movement, the limiting spring 104 is pressed inward, thereby making space for the limiting block 320 to pass through and enter the slot 1041. After the limiting block 320 is fully inserted into the slot 1041, the limiting spring 104 is reset under the action of the rebound force, so that the first guide ramp 321 and the fourth guide ramp 1043 cooperate to lock the safety latch 30 on the handle 10, and this contact position is not subjected to force during the use of this tensioner;

[0079] When the safety latch 30 is removed from the handle 10, the first guide ramp 321 is used to cooperate with the fourth guide ramp 1043 to help the safety latch 30 disengage from the handle 10.

[0080] In other embodiments, the limiting block 320 may be configured as a smooth convex structure, and the limiting spring 104 may be configured as a smooth concave structure.

[0081] In this embodiment, the handle 10 has three first connecting parts 101, which are spaced apart from each other, and the three first connecting parts 101 are used to connect three elastic bands 20 respectively.

[0082] In other embodiments, it may also include five elastic bands 20 and five first connecting portions 101. Even other quantities are possible, depending on actual needs.

[0083] The training resistance of the resistance band can be adjusted by increasing or decreasing the number of elastic bands 20 or by replacing them with elastic bands 20 with different resistance values.

[0084] In other embodiments, when the handle 10 has a first connecting part 101, the puller also includes three elastic bands 20 with different resistance values. In actual use, the training resistance value of the puller can also be adjusted by replacing another elastic band 20 with a different resistance value.

[0085] In this embodiment, the handle 10 includes a housing 110, a floating plate 120, and a resilient reset button 130;

[0086] The housing 110 has an installation space 111;

[0087] A first connecting portion 101 is formed on the floating plate 120, and a second connecting portion 102 is formed on the shell 110.

[0088] The floating plate 120 is set in the installation space 111, and one end of the elastic reset key 130 is fixed on the housing 110, and the other end is connected to the floating plate 120.

[0089] When the floating plate 120 moves away from the installation space 111 under the stretching action of the elastic band 20, the elastic reset button 130 is in a stretched state. When the stretching of the elastic band 20 is released, the elastic reset button 130 is used to reset the floating plate 120.

[0090] In this embodiment, the floating plate 120 includes a plate body and a support plate 121 connected to the plate body, and a first connecting portion 101 is formed on the support plate 121.

[0091] The housing 110 includes a housing body and a support shell 113 disposed on the housing body, and the second connecting part 102 is disposed on the support shell 113.

[0092] An expansion joint 112 is formed inside the support shell 113, which is connected to the installation space 111;

[0093] The support plate 121 is movably mounted on the telescopic channel 112, and the first connecting part 101 extends out of the telescopic channel 112.

[0094] By disposing the first connecting part 101 and the second connecting part 102 on the floating plate 120 and the housing 110 respectively, the floating plate 120 moves as the elastic band 20 is stretched and cooperates with the counting component 140, so that the present application also has a counting function.

[0095] In this embodiment, the limiting spring 104 is disposed on the support shell 113.

[0096] In this embodiment, the housing 110 includes an upper housing 115 and a lower housing 116, which are fastened together to form the aforementioned installation space 111. Limiting springs 104 are respectively provided on the upper housing 115 and the lower housing 116, and limiting blocks 320 are respectively provided on the two opposite sides of the safety lock 30.

[0097] In this embodiment, the floating plate 120 is provided with a limiting hole 122, and the housing 110 is fixed with a limiting post 114. The limiting post 114 cooperates with the limiting hole 122 to prevent the floating plate 120 from floating excessively, and there is an active gap between the limiting post 114 and the limiting hole 122.

[0098] The limiting hole 122 and the limiting post 114 cooperate to prevent the floating plate 120 from floating excessively as the elastic band 20 is stretched, and to prevent the detection part 123 on the floating plate 120 from excessively pressing the pressing contact 142, which could damage the pressing contact 142 or the counting component 140. At the same time, the size of the movement gap is adapted to the detection part 123 and the pressing contact 142.

[0099] In this embodiment, the limiting post 114 is disposed in the limiting hole 122, and the inner diameter of the limiting hole 122 is larger than the outer diameter of the limiting post 114.

[0100] In this embodiment, a counting component 140 is also included. The floating plate 120 has a detection part 123, which is used to cooperate with the counting component 140 to realize counting.

[0101] In this embodiment, the counting component 140 includes a counting chip 141 and a pressing contact 142 that is electrically connected to the counting chip 141;

[0102] The pressing contact 142 is fixed on the housing 110. When the elastic band 20 is stretched, the floating plate 120 moves closer to the elastic band 20, and the detection unit 123 presses against the pressing contact 142. When the elastic band 20 is unstretched, the floating plate 120 moves away from the elastic band 20 under the action of the elastic reset button 130, and the detection unit 123 stops pressing against the pressing contact 142, thus realizing one-press counting.

[0103] In other embodiments, the pressing contact 142 is fixed on the detection unit 123, and a stop is fixed on the housing 110. When the elastic band 20 is stretched, the pressing contact 142 moves with the floating plate 120 and cooperates with the stop to realize pressing count.

[0104] In this embodiment, the counting component 140 also includes a display screen 143, which is electrically connected to the counting chip 141. The display screen 143 is mounted on the housing 110 and is used to display counting information.

[0105] The resistance adjustment method for the tensioner provided in this application includes:

[0106] Disassembly: Apply a force to the safety buckle 30 toward the elastic band 20 to disengage the safety buckle 30 from the second connecting part 102, remove the limiting joint 210 of the elastic band 20 from the limiting mounting groove 103, and remove the safety buckle 30 from the elastic band 20.

[0107] Installation: Fit the safety buckle 30 onto the new elastic band 20, place the limiting connector 210 of the new elastic band 20 into the limiting mounting groove 103, apply a force toward the handle 10 to the safety buckle 30, so that the safety buckle 30 is engaged with the second connecting part 102.

[0108] The above description is only a preferred embodiment of the present utility model and does not limit the scope of patent protection of the present utility model. Any equivalent structural transformations made based on the content of the present utility model specification and drawings, whether directly or indirectly applied to other related technical fields, are similarly included within the scope of protection of the present utility model.

Claims

1. A resistance-adjustable chest expander, characterized by comprising: The handle, the elastic band and the safety lock buckle are included; The handle is provided with a first connecting part and a second connecting part correspondingly, the first connecting part is provided with a limiting installation slot, the elastic band is provided with a limiting connector, and the limiting connector is accommodated in the limiting installation slot; The safety lock buckle is arranged outside the first connecting part and detachably connected with the second connecting part, and the safety lock buckle and the limiting installation slot detachably lock the elastic band on the handle.

2. A resistance-adjustable tensioner according to claim 1, wherein The limiting installation slot has a slot body and first and second slot openings connected with the slot body respectively, the slot body is used for accommodating the limiting connector, the first slot opening is used for the body of the elastic band to pass out, and the second slot opening is used for the limiting connector to be taken out of the slot body; The inner side wall of the safety lock buckle is provided with a limiting plate, and the limiting plate is used for covering the second slot opening to prevent the limiting connector from being taken out of the slot body; When the limiting plate covers the second slot opening, the limiting connector of the elastic band cannot be taken out of the slot body; When the safety lock buckle is detached from the handle, the limiting connector of the elastic band can be taken out of the second slot opening.

3. A resistance-adjustable tensioner according to claim 2, wherein The handle is provided with a limiting elastic sheet, the safety lock buckle is provided with a limiting stopper, or the handle is provided with a limiting stopper, and the safety lock buckle is provided with a limiting elastic sheet, the limiting elastic sheet is provided with a clamping groove, the clamping groove cooperates with the limiting stopper, and the safety lock buckle is clamped on the handle.

4. A resistance-adjustable tensioner according to claim 3, wherein The limiting stopper is arranged on the safety lock buckle, the limiting stopper is provided with a first guide inclined surface and a second guide inclined surface, the first guide inclined surface and the second guide inclined surface are oppositely arranged, the first guide inclined surface is arranged on the side of the limiting stopper facing the elastic band, and the second guide inclined surface is arranged on the side of the limiting stopper away from the elastic band; The limiting elastic sheet is provided with a third guide inclined surface and a fourth guide inclined surface, the third guide inclined surface and the fourth guide inclined surface are oppositely arranged on the groove body on the side of the clamping groove close to the elastic band, the third guide inclined surface is arranged on the side of the limiting elastic sheet facing the elastic band, and the fourth guide inclined surface is arranged on the side of the limiting elastic sheet away from the elastic band; When the safety lock buckle is installed on the handle, the second guide inclined surface cooperates with the third guide inclined surface to move the safety lock buckle to the side of the handle, and the first guide inclined surface cooperates with the fourth guide inclined surface to clamp the safety lock buckle on the handle; When the safety lock buckle is detached from the handle, the first guide inclined surface cooperates with the fourth guide inclined surface to help the safety lock buckle to be taken out of the handle.

5. The resistance adjustable tension device of claim 1, wherein, The handle is provided with a plurality of first connecting parts, the first connecting parts are arranged at intervals, and the first connecting parts are used for connecting a plurality of elastic bands respectively.

6. The resistance adjustable tension device of claim 1, wherein, The handle includes a shell, a floating plate and an elastic reset key; The shell has an installation space; The floating plate is formed with the first connecting part, and the shell is formed with the second connecting part, The floating plate is arranged in the installation space, one end of the elastic reset key is fixed on the shell, and the other end is connected with the floating plate; When the floating plate moves to the side away from the installation space under the stretching action of the elastic band, the elastic reset key is in a stretched state, and when the elastic band is cancelled, the elastic reset key is used for resetting the floating plate.

7. A resistance adjustable tension device as defined in claim 6 wherein, The floating plate comprises a plate body and a supporting plate connected with the plate body, and the first connecting part is formed on the supporting plate; The shell comprises a shell body and a supporting shell arranged on the shell body, and the second connecting part is arranged on the supporting shell, An extension channel connected with the mounting space is formed in the supporting shell; The supporting plate is movably arranged on the extension channel, and the first connecting part extends out of the extension channel.

8. A resistance-adjustable tensioner according to claim 7, wherein A limiting hole is arranged on the floating plate, a limiting column is fixed on the shell, the limiting column cooperates with the limiting hole to prevent the floating plate from floating excessively, and an active gap is arranged between the limiting column and the limiting hole.

9. A resistance adjustable tension device as defined in claim 7, wherein, A counting component is further included, the floating plate is provided with a detection part, and the detection part is used for cooperating with the counting component to realize counting.

10. A resistance adjustable tension device as defined in claim 9, wherein, The counting component comprises a counting chip and a pressing contact electrically connected with the counting chip; The pressing contact is fixed on the shell, when the elastic band is stretched, the floating plate moves to the side close to the elastic band, the detection part is pressed against the pressing contact, when the elastic band is not stretched, the floating plate moves to the side away from the elastic band under the action of the elastic reset key, the detection part is not pressed against the pressing contact, and one-time pressing counting is realized. Alternatively, the pressing contact is fixed on the detection part, and a stopper is fixed on the shell, when the elastic band is stretched, the pressing contact moves with the floating plate and cooperates with the stopper to realize pressing counting.

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