A semi-automatic weight-adjustable lady dumbbell

Abstract

The present application relates to a kind of semi-automatic adjustment weight lady dumbbell, including handle and the counterweight disc group being arranged at the both ends of handle, counterweight disc group includes waist-shaped pull rod and several coaxially stackable connection counterweight disc, the end surface of handle is opened with the pull rod connection slot for waist-shaped pull rod movable insertion or removal, waist-shaped pull rod is movably inserted in pull rod connection slot, and it is connected or separated from handle by locking assembly, locking assembly includes rotating chuck and the rotating sleeve for driving rotating chuck rotation;The present application adopts rotating chuck to realize the circumferential multidirectional locking of counterweight disc group, improves locking strength, improves reliability, when unlocking, rotating sleeve needs to be manually pushed, so that rotating sleeve moves axially and separates from first locking groove, then rotating sleeve is rotated, the action of rotating chuck moves to unlocking position, only then can unlocking operation be completed, unlocking operation is convenient, and accidental unlocking situation can be prevented from occurring by preventing misoperation, improve the use safety of dumbbell.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of fitness equipment, in particular to a semi-automatic weight-adjustable women's dumbbell. BACKGROUND

[0002] Dumbbells are a kind of auxiliary equipment for weight lifting and fitness exercises, mainly a simple device for muscle strength training. There are two kinds of dumbbells with fixed weight and adjustable weight. Among them, the adjustable weight dumbbell usually uses a fixed nut to fasten the dumbbell pieces on both sides. When women use dumbbells, due to their own small strength, the fastening force of the fixed nut is small, which is easy to loosen, which may cause the dumbbell pieces to fall off and injure the user or other things, causing safety hazards to the user during use.

[0003] The Chinese invention patent with publication number CN213192299U provides a semi-automatic adjustable women's dumbbell. The women's dumbbell includes a handle and a dumbbell piece. The handle is a hollow structure, and the handle is connected with a flange plate at both ends. The flange plate is provided with an annular ring on the plane outer edge away from the handle. The flange plate is provided with a square hole in the center. The flange plate is provided with a button buckle slot, and the button buckle slot is installed with a button buckle. The button buckle is connected with a spring, and the other end of the spring is connected with the annular ring in the flange plate. The slider of the button buckle can move in the limiting slot of the button buckle slot. The center of the button buckle is provided with a rectangular hole, and the long side of the rectangular hole is parallel to the long side of the button buckle. An arc buckle is arranged at the short side of the rectangular hole close to the spring. The arc buckle is connected with the buckle slot on the square pull rod in the center of the bearing disc. The women's dumbbell adopts a pull buckle structure, which is convenient and fast for adjusting the weight of the dumbbell.

[0004] However, the above-mentioned women's dumbbell still has some defects:

[0005] The women's dumbbell is only provided with a button buckle on one side of the flange plate, and only one side of the dumbbell piece is locked, which has low locking strength and poor reliability.

[0006] The button buckle only needs to be pressed to be unlocked, and the dumbbell is easy to be misoperated and unlocked during use, which has low safety.

[0007] Therefore, the present application provides a semi-automatic weight-adjustable women's dumbbell to solve the above-mentioned problems. SUMMARY

[0008] The technical problem to be solved by the present application is to provide a semi-automatic weight-adjustable women's dumbbell, which realizes multi-directional locking, improves the locking strength and reliability, and can conveniently unlock and effectively prevent unlocking, thereby improving the safety.

[0009] To solve the above technical problems, the technical scheme of the present application is as follows: a semi-automatic weight-adjustable lady dumbbell, which is characterized by comprising a handle and a counterweight disc set arranged at both ends of the handle, the counterweight disc set comprising a waist-shaped pull rod and a plurality of coaxially stackable counterweight discs, the waist-shaped pull rod being provided with a plurality of counterweight disc stations, each counterweight disc being movably sleeved on the waist-shaped pull rod at the corresponding counterweight disc station, the end surface of the handle being provided with a pull rod connecting groove for the waist-shaped pull rod to be movably inserted or removed, the waist-shaped pull rod being movably inserted in the pull rod connecting groove and being connected to or separated from the handle through a locking assembly.

[0010] The locking assembly comprises a rotating chuck and a rotating sleeve for driving the rotating chuck to rotate, the rotating chuck being rotatably coaxially mounted on the handle, the rotating sleeve being rotatably and axially movably coaxially sleeved on the outside of the handle, the rotating sleeve being always connected with the rotating chuck, the rotating chuck having a locking position and an unlocking position in the rotating direction, the handle being provided with a first locking groove and a second locking groove for the rotating sleeve to axially move in or out, the first locking groove and the second locking groove corresponding to the locking position and the unlocking position respectively, the locking assembly having three working states, namely

[0011] the first working state: locking state, the rotating chuck being located at the locking position, the waist-shaped pull rod being connected with the handle, the rotating sleeve being locked in the first locking groove;

[0012] the second working state: unlocking state, the rotating chuck being located at the unlocking position, the waist-shaped pull rod being separated from the handle, the rotating sleeve being locked in the second locking groove;

[0013] the third working state: state switching, the rotating sleeve being axially moved out of the first locking groove or the second locking groove, the rotating sleeve being rotated, the rotating sleeve driving the rotating chuck to rotate between the locking position and the unlocking position for state switching.

[0014] Further, each counterweight disc is provided with an expansion bolt, the counterweight disc being provided with a first limiting through groove for mounting the expansion bolt, the first limiting through groove having an axis parallel to the axis of the counterweight disc, the expansion bolt being mounted in the first limiting through groove, the expansion bolt being provided with a second limiting groove for the end of the expansion bolt of the adjacent counterweight disc to be inserted, the end of the expansion bolt of the adjacent counterweight disc being inserted in the second limiting groove.

[0015] Further, flanges are mounted on both sides of the handle, the flanges being arranged between the rotating sleeve and the counterweight disc set, the rotating chuck being rotatably mounted in the flanges, the end surface of the rotating sleeve extending outward in the axial direction and being provided with a connecting plate, the rotating chuck being provided with a connecting groove for the connecting plate to pass through, the connecting plate passing through the flanges and being movably arranged in the connecting groove.

[0016] Further, the flange plate is movably sleeved outside the handle, the flange plate is provided with a radial limiting block, the side surface of the handle is provided with a first limiting groove for axially inserting the radial limiting block, the radial limiting block is inserted into the first limiting groove, the side of the handle, on which the flange plate is located, close to the rotating sleeve is provided with an axial limiting step, the side of the handle, on which the flange plate is located, away from the rotating sleeve is provided with an axial limiting snap spring, the side surface of the handle is provided with an annular snap spring groove, and the axial limiting snap spring is installed in the annular snap spring groove.

[0017] Further, the rotating chuck is provided with two clamping plates at opposite positions, the end surface of the handle is provided with a second limiting groove for axially inserting and rotating the clamping plate, the clamping plate is movably arranged in the second limiting groove, a chuck limiting flange is arranged between the rotating chuck and the axial limiting snap spring, the chuck limiting flange is bolted on the flange plate and cooperates with the flange plate to form a cavity for accommodating the rotating chuck, and the rotating chuck is arranged in the cavity.

[0018] Further, the side of the axial limiting snap spring, away from the chuck limiting flange, is provided with a flange plate end cover, and the flange plate end cover is bolted on the flange plate.

[0019] Further, the side of the rotating sleeve, close to the flange plate, is provided with a reset spring, the flange plate and the handle are cooperatively provided with a spring mounting groove for accommodating the reset spring, the reset spring is placed in the spring mounting groove, one end of the reset spring is connected with the flange plate, and the other end of the reset spring is in contact with the end surface of the rotating sleeve.

[0020] Further, the side surface of the waist-shaped pull rod is composed of two opposite arc-shaped curved surfaces and two opposite planes, the side surface of the waist-shaped pull rod is provided with two locking grooves for rotating the clamping plate, the locking grooves are arranged at the junctions of the adjacent arc-shaped curved surfaces and planes, the clamping plate is arranged in the locking groove at the arc-shaped curved surface in the locking state, and the clamping plate is arranged at the corresponding plane and is separated from the locking groove in the unlocking state.

[0021] Further, the two sides of the handle in the axial direction are provided with two annular bosses, a non-slip sleeve is arranged between the two annular bosses, the rotating sleeve is arranged on the side of the annular boss away from the non-slip sleeve, and the first locking groove and the second locking groove are arranged on the end surface of the annular boss close to the rotating sleeve.

[0022] Further, the arc-shaped side surface of the rotating sleeve is provided with a bidirectional arrow switch mark for indicating the corresponding rotating directions of the locking position and the unlocking position.

[0023] The present application has the following advantages:

[0024] The application adopts a rotating chuck to realize circumferential multi-direction locking of the counterweight disc set, improves the locking strength and reliability, when unlocking, the rotating sleeve needs to be manually pushed to move axially out of the first locking groove, then the rotating sleeve is rotated to move the rotating chuck to the unlocking position, so that the unlocking operation can be completed, the unlocking operation is convenient and can prevent accidental unlocking, and the use safety of the dumbbell is improved.

[0025] The application can double-position the counterweight disc by the shape structure of the waist-shaped pull rod and the expansion bolt, accurately align the outer edge surface of each counterweight disc, improve the dumbbell aesthetics, and the expansion bolt is simple in machining operation and low in production cost, which is beneficial to reducing the production cost of the dumbbell.

[0026] The dumbbell of the application only needs to align the radial limiting block of the flange plate with the first limiting groove on the handle rod, and install the axial limiting spring on the handle rod to cooperate with the axial limiting step on the handle rod to complete the flange plate fixing, which is simple in operation and convenient in assembly.

[0027] The dumbbell piece of the application limits the rotating chuck in the flange plate by the chuck limiting flange to realize detachable installation of the rotating chuck, which is convenient for installation and disassembly of the rotating chuck.

[0028] The application sets the reset spring, when the rotating chuck is in the locking position or the unlocking position, the rotating sleeve can automatically enter the first locking groove or the second locking groove under the elastic force of the reset spring, which is convenient for operation and avoids automatic disengagement of the rotating sleeve from the first locking groove or the second locking groove to cause safety hazards. BRIEF DESCRIPTION OF DRAWINGS

[0029] The application will be further described in detail below in combination with the drawings and specific embodiments.

[0030] Figure 1 The application is a structure schematic view of a semi-automatic weight-adjustable dumbbell for women.

[0031] Figure 2 The application is an axial cross-sectional view of the semi-automatic weight-adjustable dumbbell for women.

[0032] Figure 3 The application is a structure schematic view of the waist-shaped pull rod.

[0033] Figure 4 The application is a radial cross-sectional view of the locking groove of the waist-shaped pull rod.

[0034] Figure 5 The application is a structure schematic view of the counterweight disc.

[0035] Figure 6 Structure diagram of the expansion bolt of the present application.

[0036] Figure 7 Connection diagram of the flange plate and the limiting flange of the chuck of the present application.

[0037] Figure 8 Connection diagram of the flange plate, the rotary chuck and the axial limiting coil spring of the present application.

[0038] Figure 9 Structure diagram of the rotary chuck of the present application.

[0039] Figure 10 Structure diagram of the flange plate of the present application.

[0040] Figure 11 Partial structure diagram of the handle of the present application.

[0041] Figure 12 Structure diagram of the rotary sleeve of the present application.

[0042] Figure 13 Structure diagram of the flange plate and the flange plate end cover of the present application.

[0043] Figure 14 Connection diagram of the handle, the flange plate and the return spring of the present application. Embodiment

[0044] The following examples can make the skilled in the art more fully understand the present application, but the present application is not limited in the scope of the described examples.

[0045] As Figures 1-14 shown, the present application provides a kind of semi-automatic adjustment weight's lady dumbbell, including handle 1 and the counterweight disc group 2 being arranged at the both ends of handle 1, counterweight disc group 2 includes waist-shaped pull rod 201 and a plurality of coaxial stackable connection counterweight disc 202, waist-shaped pull rod 201 has a plurality of counterweight disc workstations, each counterweight disc 202 is movably sleeved on waist-shaped pull rod 1 at corresponding counterweight disc workstation, the end surface of handle 1 is opened with the pull rod connecting groove 101 for waist-shaped pull rod 201 mobile insertion or removal, waist-shaped pull rod 201 is movably arranged in pull rod connecting groove 101, and connection or disengagement handle 1 is realized by locking assembly.

[0046] The flange plate 102 is arranged on the two sides of the handle 1, the fixed plate 203 is arranged on the side of the waist-shaped pull rod 201 away from the flange plate 102, the space between the fixed plate 203 and the flange plate 102 is used for arranging the counterweight plate set 2, two expansion bolts 2021 are arranged at the opposite positions on each counterweight plate 202, the first limiting through slot for arranging the expansion bolts 2021 is arranged on the counterweight plate 202, the axis of the first limiting through slot is parallel to the axis of the counterweight plate 202, the expansion bolts 2021 are arranged in the first limiting through slot, the second limiting slot 20211 is arranged on the nut of the expansion bolt 2021, the end of the expansion bolt of the adjacent counterweight plate is inserted into the second limiting slot 20211, and the screw end of the expansion bolt of the adjacent counterweight plate is arranged in the second limiting slot 20211; when the counterweight plate 202 is arranged, the waist-shaped pull rod and the expansion bolt 2021 are used for double positioning, so that the outer edge surface of each counterweight plate is accurately aligned.

[0047] The locking assembly comprises the rotating chuck 301 and the rotating sleeve 302 for driving the rotating chuck 301 to rotate, the rotating chuck 301 is rotatably coaxially arranged on the handle 1 through the flange plate 102, the rotating sleeve 302 is rotatably and axially movably coaxially arranged on the outer side of the handle 1, the flange plate 102 is arranged between the rotating sleeve 302 and the counterweight plate set 2, the rotating chuck 301 is rotatably arranged in the flange plate 102, the connecting plate 3021 is outwardly extended on the end face of the rotating sleeve 302 in the axial direction, the connecting slot 3011 is arranged on the rotating chuck 301 and used for the connecting plate 3021 to pass through, the connecting plate 3021 passes through the flange plate 102 and is movably arranged in the connecting slot 3011, so that the rotating sleeve 302 is always connected with the rotating chuck 301 during the movement.

[0048] In the embodiment, the flange plate 102 is movably arranged on the outer side of the handle 1, the two radial limiting blocks 1021 are arranged at the opposite positions on the inner side wall of the flange plate 102, the first limiting slot 103 is arranged on the side of the handle 1 and used for the radial limiting block 1021 to axially move and insert, the radial limiting block 1021 is arranged in the corresponding first limiting slot 103, the flange plate 102 is radially limited, so that the flange plate is prevented from rotating relative to the handle, the axial limiting step 104 is arranged on the side of the handle 1 close to the rotating sleeve, the axial limiting snap spring 105 is arranged on the side of the flange plate 102 away from the rotating sleeve 302, the annular snap spring slot 1051 is arranged on the side of the handle 1, the axial limiting snap spring 105 is arranged in the annular snap spring slot 1051, the flange plate is axially limited through the cooperation of the axial limiting step 104 and the axial limiting snap spring 105, and the flange plate is prevented from axially moving relative to the handle.

[0049] The relative position of the rotating chuck 301 has two clamping plates 3012, which are in the shape of a 7, and connecting grooves 3011 are respectively arranged on the two clamping plates 3012. The end surface of the handle 1 is provided with a second limiting groove 106 for the axial movement and rotation of the clamping plate 3012. The clamping plate 3012 is movably arranged in the second limiting groove 106. The rotating chuck 301 is provided with a chuck limiting flange 107 between the rotating chuck 301 and the axial limiting clamping spring 105. The chuck limiting flange 107 is connected to the flange plate 102 by bolts and cooperates with the flange plate 102 to form a cavity for accommodating the rotating chuck 301. The rotating chuck 301 is arranged in the cavity. The side of the axial limiting clamping spring 105 away from the chuck limiting flange 107 is provided with a flange plate end cover 108 which is connected to the flange plate 102 by bolts. The flange plate end cover 108 protects the accessories installed in the flange plate. The flange plate end cover 108 is provided with a groove 1081 for the screw end of the expansion bolt of the adjacent counterweight disc to enter, so that the counterweight disc can be installed to be flush with the end surface of the flange plate end cover and the installation angle of the counterweight disc is limited.

[0050] The side of the rotating sleeve 302 close to the flange plate 102 is provided with a reset spring 4. The flange plate 102 and the handle 1 are provided with a spring mounting groove 401 for accommodating the reset spring 4. The reset spring 4 is placed in the spring mounting groove 401. One end of the reset spring 4 is connected to the flange plate 102, and the other end of the reset spring 4 is in contact with the end surface of the rotating sleeve 302. In order to improve the uniformity of the stress of the rotating sleeve 302, two reset springs 4 are provided and symmetrically arranged about the central axis of the handle 1. The central axis of the reset spring 4 is parallel to the central axis of the handle 1. When the rotating chuck is in the locked position or the unlocked position, the rotating sleeve can automatically enter the first locking groove or the second locking groove under the elastic force of the reset spring 4, which is convenient for operation and avoids the safety hazard of the rotating sleeve automatically separating from the first locking groove or the second locking groove.

[0051] The rotating chuck 301 has a locked position and an unlocked position in the rotation direction. The handle 1 has a first locking groove 501 and a second locking groove 502 for the axial movement of the rotating sleeve 302 into or out of the handle 1. The first locking groove 501 and the second locking groove 502 correspond to the locked position and the unlocked position, respectively. The handle 1 has two annular bosses 109 on both sides in the axial direction. The two annular bosses 109 are provided with a non-slip sleeve 110, which facilitates the operator to hold the dumbbell and avoids the palm from slipping, thereby improving safety. The rotating sleeve 302 is arranged on the side of the annular boss 109 away from the non-slip sleeve 110. The first locking groove 501 and the second locking groove 502 are arranged on the end surface of the annular boss 109 close to the rotating sleeve 302. The end surface of the rotating sleeve 302 has a protrusion 3022 which is clamped into the first locking groove 501 or the second locking groove 502.

[0052] In this embodiment, the side surface of the waist-shaped pull rod 201 is composed of two opposite arc surfaces and two opposite planes, and two locking grooves 2011 for the rotation of the clamping plates 3012 are formed in the side surface of the waist-shaped pull rod 201, and the locking grooves 2011 are formed at the junction of the adjacent arc surfaces and planes.

[0053] The locking assembly has three working states, which are

[0054] The first working state is the locking state, the rotating chuck 301 is located at the locking position, that is, the clamping plate 3012 is located in the locking groove 2011 at the arc surface of the waist-shaped pull rod 201, the waist-shaped pull rod 201 is connected with the handle 1, and the protrusion 3022 of the rotating sleeve 302 is located in the first locking groove 501 for locking;

[0055] The second working state is the unlocking state, the rotating chuck 301 is located at the unlocking position, that is, the clamping plate 3012 is located at the plane and is separated from the locking groove 2011, the waist-shaped pull rod 201 is disconnected with the handle 1, and the protrusion 3022 of the rotating sleeve 302 is located in the second locking groove 502 for locking;

[0056] The third working state is the state switching, the rotating sleeve 302 is manually pushed to move axially, the protrusion 3022 of the rotating sleeve 302 is moved out of the first locking groove 501 or the second locking groove 502, the rotating sleeve 302 is manually rotated, and the rotating sleeve 302 drives the rotating chuck 301 to rotate between the locking position and the unlocking position to switch the state.

[0057] In order to facilitate the operation of people, the arc side surface of the rotating sleeve 302 has a bidirectional arrow switch mark 3023 for indicating the corresponding rotating direction of the locking position and the unlocking position, and people can operate the locking and unlocking according to the direction indicated by the arrow.

[0058] The dumbbell of the present application adopts the rotating chuck to realize the circumferential multi-directional locking of the weight disc set, improves the locking strength and reliability, and when unlocking, the rotating sleeve needs to be manually pushed to move axially and be separated from the first locking groove, and then the rotating sleeve is rotated to move the rotating chuck to the unlocking position, so that the unlocking operation can be completed, which is convenient and can prevent accidental unlocking from occurring, thereby improving the use safety of the dumbbell.

[0059] In addition, when the components of the dumbbell are produced and assembled, the rotating sleeve is first installed on the handle, the rotating chuck is installed on the flange in advance, the chuck limiting flange is installed to limit the rotating chuck, the flange with the installed rotating chuck and the chuck limiting flange is installed on the handle, the return spring is installed, the axial limiting clasp is installed, the flange end cover is installed, then a corresponding number of weight discs are sleeved on the waist-shaped pull rod, and finally the waist-shaped pull rod locking operation is performed, which is convenient and reduces the production cost.

[0060] Those skilled in the art should understand that the present application is not limited by the above-mentioned embodiments, the above-mentioned embodiments and descriptions in the specification are only to illustrate the principles of the present application, and various changes and improvements can be made to the present application without departing from the spirit and scope of the present application, and these changes and improvements all fall within the scope of the claimed present application. The scope of protection of the present application is defined by the appended claims and their equivalents.

Claims

1. A semi-automatic weight-adjustable women's dumbbell, characterized in that: The handle bar comprises a handle bar and a counterweight disc set arranged at both ends of the handle bar, the counterweight disc set comprises a waist-shaped pull rod and a plurality of coaxially stackable counterweight discs, the waist-shaped pull rod is provided with a plurality of counterweight disc positions, each counterweight disc is movably sleeved on the waist-shaped pull rod at the corresponding counterweight disc position, and an end surface of the handle bar is provided with a pull rod connecting groove for movably inserting or removing the waist-shaped pull rod, the waist-shaped pull rod is movably arranged in the pull rod connecting groove, and the waist-shaped pull rod is connected with or separated from the handle bar through a locking assembly; The locking assembly comprises a rotating chuck and a rotating sleeve for driving the rotating chuck to rotate, the rotating chuck is coaxially and rotatably arranged on the handle bar, the rotating sleeve is coaxially and rotatably arranged on the outer side of the handle bar, the rotating sleeve is always connected with the rotating chuck, the rotating chuck has a locking position and an unlocking position in the rotating direction, the handle bar is provided with a first locking groove and a second locking groove for axially moving the rotating sleeve into or out of the handle bar, the first locking groove and the second locking groove correspond to the locking position and the unlocking position respectively, and the locking assembly has three working states, namely a first working state: a locking state, the rotating chuck is located at the locking position, the waist-shaped pull rod is connected with the handle bar, and the rotating sleeve is locked in the first locking groove; a second working state: an unlocking state, the rotating chuck is located at the unlocking position, the waist-shaped pull rod is separated from the handle bar, and the rotating sleeve is locked in the second locking groove; a third working state: state switching, the rotating sleeve is axially moved out of the first locking groove or the second locking groove, the rotating sleeve is rotated, the rotating sleeve drives the rotating chuck to rotate between the locking position and the unlocking position to switch the state; The handle bar is provided with a flange plate on both sides, the flange plate is arranged between the rotating sleeve and the counterweight disc set, the rotating chuck is rotatably arranged in the flange plate, the end surface of the rotating sleeve outwardly extends in the axial direction and has a connecting plate, the rotating chuck is provided with a connecting groove for the connecting plate to pass through, and the connecting plate passes through the flange plate and is movably arranged in the connecting groove; The flange plate is movably sleeved on the outer side of the handle bar, the flange plate is provided with a radial limiting block, the side surface of the handle bar is provided with a first limiting groove for axially moving and inserting the radial limiting block, the radial limiting block is arranged in the first limiting groove, the side of the handle bar, on which the flange plate is located, close to the rotating sleeve is provided with an axial limiting step, the side of the handle bar, on which the flange plate is located, away from the rotating sleeve is provided with an axial limiting snap spring, and the side surface of the handle bar is provided with an annular snap spring groove, the axial limiting snap spring is arranged in the annular snap spring groove; The rotating chuck is provided with two clamping plates at opposite positions, the end surface of the handle bar is provided with a second limiting groove for axially moving and rotating the clamping plates, the clamping plates are movably arranged in the second limiting groove, a chuck limiting flange is arranged between the rotating chuck and the axial limiting snap spring, the chuck limiting flange is bolted on the flange plate and cooperates with the flange plate to form a cavity for accommodating the rotating chuck, and the rotating chuck is arranged in the cavity; The side of the rotating sleeve, close to the flange plate, is provided with a reset spring, the flange plate and the handle bar are cooperatively provided with a spring mounting groove for accommodating the reset spring, the reset spring is arranged in the spring mounting groove, one end of the reset spring is connected with the flange plate, and the other end of the reset spring is in contact with the end surface of the rotating sleeve. The side of the waist-shaped pull rod is composed of two opposite arc-shaped curved surfaces and two opposite planes, two locking grooves for the rotation of the clamping plates are formed in the side of the waist-shaped pull rod, the locking grooves are formed at the joint of the adjacent arc-shaped curved surface and plane, the clamping plate is in the locking groove at the arc-shaped curved surface in the locking state, and the clamping plate is at the corresponding plane and separated from the locking groove in the unlocking state.

2. The semi-automatic adjustable weight ladies dumbbell as claimed in claim 1 wherein: The expansion bolts are arranged on each counterweight disc, the first limiting through groove for mounting the expansion bolts is formed in the counterweight disc, the axis of the first limiting through groove is parallel to the axis of the counterweight disc, the expansion bolts are mounted in the first limiting through groove, the second limiting groove for inserting the end of the expansion bolt of the adjacent counterweight disc is arranged on the expansion bolt, and the end of the expansion bolt of the adjacent counterweight disc is inserted into the second limiting groove.

3. The semi-automatic adjustable weight ladies dumbbell as claimed in claim 1 wherein: The flange end cover is arranged on the side, away from the chuck limiting flange, of the axial limiting clasp spring, and the flange end cover is bolted to the flange.

4. The semi-automatic adjustable weight ladies dumbbell as claimed in claim 1 wherein: The two annular bosses are arranged on the two sides of the axial direction of the handle rod, the anti-skid sleeve is arranged between the two annular bosses, the rotating sleeve is arranged on the side, away from the anti-skid sleeve, of the annular boss, and the first locking groove and the second locking groove are formed in the end face of the annular boss, close to the rotating sleeve.

5. The semi-automatic adjustable weight ladies dumbbell as claimed in claim 1 wherein: The arc-shaped side of the rotating sleeve is provided with a bidirectional arrow switch mark for indicating the corresponding rotating directions of the locking position and the unlocking position.

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