Safety structure on weight-adjusting dumbbell

Abstract

The utility model relates to the field of fitness equipment, in particular to a safety structure on a weight-adjusting dumbbell, which comprises a base, a dumbbell main body and a plurality of balancing weights, the dumbbell body comprises a grab handle and balance weight units located on the two sides of the grab handle. The counterweight unit comprises a counterweight frame, and a positioning turntable and a plurality of check discs which are arranged in the counterweight frame, the positioning turntable and the plurality of check discs are linked with each other in the circumferential direction and are connected with a driving part, and the check discs can clamp or loosen the counterweight blocks in the rotating process; anti-disengaging teeth are arranged on the edge of the positioning rotary disc in the circumferential direction at intervals, and a disengaging opening is formed between every two adjacent anti-disengaging teeth; an anti-falling hook is arranged on the base, and when the hooking disc and the balancing weight are not completely clamped or loosened, the anti-falling hook is connected with the anti-falling teeth; when the selecting disc and the balancing weight are completely clamped or loosened, the anti-disengaging hook and the anti-disengaging teeth are loosened and can be separated from the disengaging opening. The scheme can ensure the use safety of the dumbbell.

Description

Technical Field

[0001] The utility model relates to the field of fitness equipment, in particular to a safety structure on a weight-adjustable dumbbell. Background Art

[0002] Dumbbells, as an auxiliary equipment for weightlifting and fitness exercises, are simple in structure, easy to use, and can be used to enhance muscle strength training, making them very popular. Dumbbells are mainly of two types in the prior art: fixed-weight dumbbells and adjustable-weight dumbbells. The fixed-weight dumbbells require a set of dumbbells of different weights to meet the needs of the trainee; the adjustable-weight dumbbells are popular among athletes because of their adjustable weight.

[0003] For example, a Chinese utility model patent with the publication number "CN205867408U" describes a weight-adjustable dumbbell, comprising a plurality of dumbbell plates; a base at both ends for accommodating the dumbbell plates in an upright position; a grip portion in the middle, which automatically locks dumbbell plates of different weights to the two ends when rotated to different angles, leaving the remaining dumbbell plates in the base. The dumbbell bar includes a core shaft with a grip portion in the middle; a weight adjustment dial fixed to the end of the core shaft; and a plurality of cams at both ends of the core shaft, which respectively match the shape of each dumbbell plate and rotate with the weight adjustment dial to cause dumbbell plates of corresponding weights to engage their outer edges, thereby locking the dumbbell plates thereto. During use, the dumbbell plates are placed upright in the base, the dumbbell bar is placed on the dumbbell plates, and the weight adjustment dial is rotated, and the dumbbell plates of corresponding weights are locked to the dumbbell bar.

[0004] To ensure safety in use, this solution sets a positioning plate and a positioning button that cooperates with it between the cam plate and the grip. Under normal conditions, the positioning plate is locked by the positioning button so that the positioning plate cannot rotate, and therefore the weight adjustment dial cannot rotate either. When the weight adjustment dial needs to be rotated to adjust the weight, the positioning button is pressed to allow the positioning plate to rotate freely, so the weight adjustment dial can also rotate freely. This ensures that when the dumbbell is used normally, the dumbbell pieces will not fall off due to the malfunction of the weight adjustment dial, which would cause a safety hazard. However, the positioning button in the above solution is set on the crossbeam, which can easily cause the dumbbell to fall off during use due to accidental touch, thus causing a safety accident. Summary of the Invention

[0005] In order to solve the above problems, the purpose of the present invention is to provide a safety structure on a weight-adjustable dumbbell, which can ensure the safety of the dumbbell in use.

[0006] In order to achieve the above-mentioned purpose, the present invention adopts the following technical solutions:

[0007] The safety structure on the weight-adjustable dumbbell includes a base, a dumbbell body and multiple counterweights; storage grooves are constructed on both sides of the upper end surface of the base, and multiple counterweights are placed on the storage grooves of the base; the dumbbell body includes a handle, and a counterweight unit on both sides of the handle; it is characterized in that: the counterweight unit includes a counterweight frame, and a positioning turntable and multiple ticking disks arranged inside the counterweight frame, the positioning turntable and the multiple ticking disks are interconnected in the circumferential direction and connected to the driving component, and the counterweight can be stuck or released during the rotation of the ticking disk; anti-slip teeth are arranged at intervals along the circumferential direction on the edge of the positioning turntable, and a disengagement opening is formed between two adjacent anti-slip teeth; an anti-slip hook is provided on the base, and when the ticking disk and the counterweight are not completely stuck or released, the anti-slip hook engages with the anti-slip teeth; when the ticking disk and the counterweight are completely stuck or released, the anti-slip hook and the anti-slip teeth are released and can be separated from the disengagement opening.

[0008] The utility model adopts the above-mentioned technical solution. The dumbbell body in the safety structure of the weight-adjustable dumbbell includes a handle and counterweight units on both sides thereof, wherein a positioning turntable and a plurality of ticking disks are arranged between the counterweight frames of the counterweight units. The positioning turntable and the plurality of ticking disks are circumferentially linked and driven to rotate by a driving component. The driving component can adopt the weight adjustment turntable described in the background technology solution (CN205867408U), or the handle in the middle of the dumbbell body described below.

[0009] Compared with the solution of the background technology, the present solution is similar to it in that: anti-slip teeth are provided at intervals along the circumference of the edge of the positioning turntable, and a slip opening is formed between two adjacent anti-slip teeth. The innovation of this solution is that: an anti-slip hook is provided on the base, and the anti-slip hook cooperates with the edge structure of the positioning turntable to ensure that the positioning turntable and its linked check disk are adjusted into place (including completely locking or releasing the counterweight block), which can ensure that the check disk is firmly connected to the counterweight block; if it is not adjusted into place, the anti-slip hook engages with the anti-slip teeth to prevent the dumbbell body from detaching from the base.

[0010] Therefore, this solution can ensure the safe use of dumbbells.

[0011] In a further embodiment, the counterweight frame is constructed with a locking assembly for locking or unlocking the positioning dial, and an unlocking component is provided on the upper end surface of the base. When the dumbbell body is placed on the base, the unlocking component acts on the locking assembly to unlock it. In this solution, the locking assembly on the counterweight frame can be used to lock or unlock the positioning dial, thereby controlling the circumferential movement or locking of the positioning dial and its linked check disk. Furthermore, the unlocking component is provided on the upper end surface of the base. This allows the locking assembly to be unlocked and the counterweight to be rotated and adjusted only when the dumbbell body is placed on the base. When the dumbbell body is removed from the base, the positioning dial and its linked check disk are locked.

[0012] In a specific embodiment, the positioning turntable is constructed with a plurality of locking holes along its circumference, and the locking assembly is inserted into any of the locking holes to lock the positioning turntable relative to the inner end disk.

[0013] Preferably, the counterweight frame includes an outer end plate, an inner end plate, and a connecting bridge for connecting the outer and inner end plates. This solution secures the outer and inner end plates together via the connecting bridge, forming a stable counterweight frame. The positioning turntable and multiple checker plates are rotatably disposed between the outer and inner end plates; the locking assembly is fixed to the inner end plate.

[0014] Furthermore, the inner end disc is equipped with an elastic pin assembly, and the positioning dial is also configured with multiple positioning holes along its circumference. As the positioning dial rotates, steel balls on the elastic pin assembly can engage or exit these positioning holes. The elastic pin assembly and the multiple positioning holes provide feedback to the user, as the steel balls engage, confirming that the adjustment is in place.

[0015] In a further solution, a cover is fixedly connected to the end face of the inner end disk facing the positioning turntable, and the locking assembly includes a locking block, an unlocking block and a locking spring in the cover; the locking spring is supported on the locking block, and the locking block is provided with a locking shaft extending from the cover; the unlocking block is slidably provided on the inner end disk and wedge-fits with the locking block. In this solution, only under the action of the locking spring, the locking shaft on the locking block extends out of the cover and clamps the positioning turntable. When an external force acts on the unlocking block, the unlocking block slides and the inclined surface squeezes the locking block to unlock it. In a specific solution, the unlocking component of the base is a protrusion. When the dumbbell body is placed on the base, the protrusion acts on the unlocking block and drives the locking shaft on the locking block to retract by pressing against the inclined surface.

[0016] In a further embodiment, a flange extends outward from the edge of the inner end disc, with the positioning dial positioned inside this flange. In this embodiment, the flange covers the positioning dial, preventing interference with its rotation or positioning. Furthermore, a gear position indicator is provided on the outer wall of the positioning dial, and a gear position hole is provided on the flange of the inner end disc or on the connecting bridge to expose the gear position indicator. During the coordinated rotation of the positioning dial and the checkbox disc, the gear position indicator on the positioning dial can be observed through the gear position hole, thereby indicating the current counterweight weight.

[0017] In a specific embodiment, the flanged lower end surface of the inner end plate is constructed with a through hole for the anti-slip hook and unlocking component on the base to extend into the through hole between the inner end plate and the positioning turntable; when the dumbbell body is placed on the base, the unlocking component on the base extends into the through hole to unlock the locking assembly, and at the same time the anti-slip hook extends into the through hole and hooks or releases the anti-slip teeth on the edge of the positioning turntable.

[0018] In a specific embodiment, the ticking disc has a curved ridge on at least one surface, which is arranged unclosed along the circumference of the disc. A positioning bump protruding from one end of the surface of the counterweight is provided on one side of the disc. When the ticking disc is selected and the positioning bump is positioned above the curved ridge, the ticking disc engages the counterweight. During rotation of the ticking disc, the curved ridge rotates with the disc. When the curved ridge rotates below the positioning bump, the dumbbell body is lifted upward, causing the curved ridge to support the positioning bump, thereby engaging the counterweight. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 The present invention is a schematic diagram of the dumbbell structure involved.

[0020] Figure 2 The present invention is a cross-sectional view of the dumbbell structure involved.

[0021] Figure 3 for Figure 2 Magnified view of part A.

[0022] Figure 4 This is a schematic diagram of the dumbbell body being removed from the base.

[0023] Figure 5 Schematic diagram of the structure of the dumbbell body.

[0024] Figure 6 This is an exploded view of the structure of one side of the dumbbell body.

[0025] Figure 7 Schematic diagram of the assembly of the positioning turntable and the inner end plate Figure 1 .

[0026] Figure 8 Schematic diagram of the assembly of the positioning turntable and the inner end plate Figure 2 .

[0027] Figure 9 Schematic diagram of the structure of the counterweight.

[0028] Figure 10 A schematic diagram of the base structure. DETAILED DESCRIPTION

[0029] The following describes in detail embodiments of the present invention, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to explain the present invention, and should not be construed as limiting the present invention.

[0030] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "clockwise", "counterclockwise" and the like to indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as a limitation on the present invention.

[0031] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature specified as "first" or "second" may explicitly or implicitly include one or more of such features. In the description of this utility model, unless otherwise specified, "plurality" means two or more, unless expressly limited otherwise.

[0032] In this utility model, unless otherwise specified or limited, the terms "installed," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integral connection; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on specific circumstances.

[0033] In the present invention, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features being in contact not directly but through another feature between them. Moreover, a first feature being "above," "above," and "above" a second feature may include the first feature being directly above or obliquely above the second feature, or may simply mean that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature may include the first feature being directly below or obliquely below the second feature, or may simply mean that the first feature is lower in level than the second feature.

[0034] like Figures 1 to 10As shown, this embodiment relates to a safety structure on a weight-adjustable dumbbell, comprising a base 1, a dumbbell body 2 and a plurality of counterweights 3. Receiving grooves 10 are constructed on both sides of the upper end surface of the base 1, and the plurality of counterweights 3 are placed on the receiving grooves 10 of the base 1. The dumbbell body 2 includes a handle 22, and a counterweight unit on both sides of the handle 22. The counterweight unit includes a counterweight frame 23, and a positioning turntable 24 and a plurality of ticking disks 25 arranged inside the counterweight frame 23. The positioning turntable 24 and the plurality of ticking disks 25 are circumferentially linked to each other and connected to the driving component. The ticking disk 25 can clamp or release the counterweight 3 during rotation. As shown Figure 6 and 9 As shown, an arcuate ridge 251 is constructed on at least one surface of the disc body of the ticking disc 25, and the arcuate ridge 251 is not closed along the circumference of the disc body of the ticking disc 25. A positioning protrusion 31 protruding from the end surface is provided on one side surface of the counterweight 3. When the ticking disc 25 is selected so that the positioning protrusion 31 is supported above the arcuate ridge 251, the ticking disc 25 clamps the counterweight 3. During the rotation of the ticking disc 25, the arcuate ridge 251 rotates with the disc body. When the arcuate ridge 251 rotates to below the positioning protrusion 31. Pulling the dumbbell body 2 upwards can make the arcuate ridge 251 support the positioning protrusion 31 upward, so that the ticking disc 25 clamps the counterweight 3.

[0035] The dumbbell body 2 in the safety structure of the weight-adjustable dumbbell includes a handle 22 and weight units on both sides thereof, wherein a positioning turntable 24 and a plurality of ticking disks 25 are provided between the weight frames 23 of the weight units. The positioning turntable 24 and the plurality of ticking disks 25 are circumferentially linked and driven to rotate by a driving component. The driving component can adopt the weight adjustment turntable described in the background technology solution [CN205867408U], or the handle 22 in the middle of the dumbbell body 2 described below. Figure 2 and 6 As shown, the handle 22, the positioning turntable 24 and the multiple ticking disks 25 are all sleeved on the central shaft 21. The handle 22 is circumferentially linked with the positioning turntable 24 and the multiple ticking disks 25. Rotating the handle 22 can control the positioning turntable 24 and the multiple ticking disks 25 to rotate synchronously, thereby achieving the adjustment of the counterweight.

[0036] like Figure 3 and 8As shown in Figure 10, anti-slip teeth 241 are provided at intervals along the circumference on the edge of the positioning turntable 24, and a disengagement opening 242 is formed between two adjacent anti-slip teeth 241. An anti-slip hook 12 is provided on the base 1, and when the selection disk 25 and the counterweight block 3 are not completely stuck or released, the anti-slip hook 12 engages with the anti-slip tooth 241. When the selection disk and the counterweight block 3 are completely stuck or released, the anti-slip hook 12 is released from the anti-slip tooth 241 and can be separated from the disengagement opening 242. Compared with the solution of the background technology, the present solution is similar to it in that: anti-slip teeth 241 are provided at intervals along the circumference on the edge of the positioning turntable 24, and a disengagement opening 242 is formed between two adjacent anti-slip teeth 241. The innovation of this solution lies in the anti-slip hook 12 provided on the base 1. This anti-slip hook 12 cooperates with the edge structure of the positioning dial 24 to ensure that the positioning dial 24 and its linked selector plate 25 are properly adjusted (including fully engaging or releasing the counterweight 3), ensuring that the selector plate 25 is securely connected to the counterweight 3. If the adjustment is not in place, the anti-slip hook 12 engages with the anti-slip teeth 241, preventing the dumbbell body 2 from detaching from the base 1. Therefore, this solution ensures the safety of the dumbbell.

[0037] In such Figure 2 and 3In the embodiments shown in Figures 7 and 8, the counterweight frame 23 is constructed with a locking assembly 4 for locking or unlocking the positioning dial 24, and an unlocking member 13 is provided on the upper end surface of the base 1. When the dumbbell body 2 is placed on the base 1, the unlocking member 13 acts on the locking assembly 4 to unlock it. In this embodiment, the locking assembly 4 on the counterweight frame 23 can be used to lock or unlock the positioning dial 24, thereby controlling the circumferential movement or locking of the positioning dial 24 and its linked selection dial 25. Furthermore, the unlocking member 13 is provided on the upper end surface of the base 1. This allows the locking assembly 4 to be unlocked only when the dumbbell body 2 is placed on the base 1, allowing rotational adjustment of the counterweight. When the dumbbell body 2 is removed from the base 1, the positioning dial 24 and its linked selection dial 25 are locked. In a specific embodiment, the counterweight frame 23 includes an outer end disc 231, an inner end disc 232, and a connecting bridge 233 for connecting the outer and inner end discs 231 and 232. This solution securely connects the outer end disc 231 and the inner end disc 232 via a connecting bridge 233, forming a stable counterweight frame 23. A positioning dial 24 and multiple check discs 25 are rotatably disposed between the outer end disc 231 and the inner end disc 232. The locking assembly 4 is fixed to the inner end disc 232. The positioning dial 24 is formed with multiple locking holes 243 along its circumference. The locking assembly 4 engages any of these locking holes 243 to lock the positioning dial 24 relative to the inner end disc 232. In a further embodiment, a cover 45 is secured to the end face of the inner end disc 232 facing the positioning dial 24. The locking assembly 4 includes a locking block 41, an unlocking block 42, and a locking spring 43 within the cover 45. The locking spring 43 supports the locking block 41, which is provided with a lock shaft 44 extending from the cover 45. The unlocking block 42 slides on the inner end disc 232 and engages with the locking block 41 in a wedge-shaped manner. In this embodiment, only under the action of the locking spring 43 does the locking shaft 44 on the locking block 41 extend from the cover 45 to engage the positioning dial 24. When an external force acts on the unlocking block 42, the unlocking block 42 slides and its inclined surface presses against the locking block 41, unlocking the dumbbell. In this embodiment, the unlocking member 13 of the base 1 is a protrusion. When the dumbbell body 2 is placed on the base 1, the protrusion acts on the unlocking block 42 and, through the inclined surface, drives the locking shaft 44 on the locking block 41 back.

[0038] Furthermore, an elastic pin assembly 5 is provided on the inner end disc 232, and a plurality of positioning holes 244 are formed along the circumference of the positioning dial 24. As the positioning dial 24 rotates, steel balls 51 on the elastic pin assembly 5 can engage or exit the positioning holes 244. The interaction between the elastic pin assembly 5 and the plurality of positioning holes 244 provides feedback to the user, indicating that the adjustment is in place by making the sound of the steel balls 51 engaging with the positioning holes 244.

[0039] like Figure 7 and 8As shown, a flange 234 is constructed extending outward from the edge of the inner end disk 232, and the positioning turntable 24 is located on the inner side of the flange 234. In this solution, the flange 234 is used to cover the positioning turntable 24 to prevent interference with the rotation or positioning of the positioning turntable 24. In addition, a gear mark is provided on the outer wall surface of the positioning turntable 24, and a gear through-hole is constructed on the flange 234 of the inner end disk 232 or on the connecting bridge 233 for the gear mark to be exposed. During the coordinated rotation of the positioning turntable 24 and the check disk 25, the gear mark on the positioning turntable 24 can leak out of the gear through-hole 235 and be observed, thereby indicating the current counterweight weight. In a specific embodiment, the lower end surface of the flange 234 of the inner end disk 232 is constructed with a through-hole 236 for the anti-disconnection hook 12 and the unlocking component 13 on the base 1 to extend into between the inner end disk 232 and the positioning turntable 24. When the dumbbell body 2 is placed on the base 1 , the unlocking component 13 on the base 1 extends into the through hole 236 to unlock the locking assembly 4 , and the anti-slip hook 12 extends into the through hole 236 to hook or release the anti-slip teeth 241 on the edge of the positioning turntable 24 .

[0040] During use of the dumbbell, the locking assembly 4 and unlocking member 13 cooperate to ensure that the dumbbell body 2 can be rotated and adjusted only when it is on the base 1. The anti-slip hook 12 on the base 1 cooperates with the anti-slip teeth 241 on the edge of the positioning dial 24, ensuring that the dumbbell body 2 can only be lifted from the base 1 after the gear is adjusted to the desired position. The elastic pin assembly 5 cooperates with the multiple positioning holes 244 on the positioning dial 24 to provide feedback to the user on whether the current gear has been adjusted to the desired position. This solution ensures the safe use of the dumbbell and prevents accidents.

[0041] Throughout this specification, reference to terms such as "one embodiment," "some embodiments," "examples," "specific examples," or "some examples" means that the specific features, structures, materials, or characteristics described in conjunction with that embodiment or example are included in at least one embodiment or example of the present invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0042] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are illustrative and cannot be understood as limitations on the present invention. Ordinary technicians in this field can change, modify, replace and modify the above embodiments within the scope of the present invention without departing from the principles and purpose of the present invention.

Claims

1. A safety structure on a weight-adjustable dumbbell, comprising a base (1), a dumbbell body (2), and a plurality of counterweights (3); the base (1) is provided with receiving grooves (10) on both sides of an upper end surface, and the plurality of counterweights (3) are placed on the receiving grooves (10) of the base (1); the dumbbell body (2) comprises a handle (22), and counterweight units on both sides of the handle (22); and the structure is characterized in that: The counterweight unit comprises a counterweight frame (23), a positioning turntable (24) and a plurality of ticking disks (25) arranged inside the counterweight frame (23), the positioning turntable (24) and the plurality of ticking disks (25) being circumferentially linked to each other and connected to a driving component, and the ticking disk (25) can clamp or release the counterweight (3) during rotation; anti-slip teeth (241) are arranged at intervals along the circumference on the edge of the positioning turntable (24), and a slip opening (242) is formed between two adjacent anti-slip teeth (241); an anti-slip hook (12) is arranged on the base (1), and when the ticking disk (25) and the counterweight (3) are not completely clamped or released, the anti-slip hook (12) engages with the anti-slip tooth (241); when the ticking disk and the counterweight (3) are completely clamped or released, the anti-slip hook (12) is released from the anti-slip tooth (241) and can be separated from the slip opening (242).

2. The safety structure on the weight-adjustable dumbbell according to claim 1, characterized in that: A locking assembly (4) for locking or unlocking the positioning turntable (24) is constructed on the counterweight frame (23), and an unlocking component (13) is provided on the upper end surface of the base (1); when the dumbbell body (2) is placed on the base (1), the unlocking component (13) acts on the locking assembly (4) to drive the locking assembly (4) to unlock.

3. The safety structure on the weight-adjustable dumbbell according to claim 2, characterized in that: The positioning turntable (24) is constructed with a plurality of locking holes (243) along its circumference, and the locking assembly (4) is engaged in any locking hole (243) to lock the positioning turntable (24) relative to the inner end disk (232).

4. The safety structure on the weight-adjustable dumbbell according to claim 2, characterized in that: The counterweight frame (23) includes an outer end disc (231), an inner end disc (232), and a connecting bridge (233) for connecting the outer end disc (231) and the inner end disc (232); a positioning turntable (24) and a plurality of ticking discs (25) are rotatably arranged between the outer end disc (231) and the inner end disc (232); and the locking assembly (4) is fixed on the inner end disc (232).

5. The safety structure on the weight-adjustable dumbbell according to claim 4, characterized in that: The inner end disc (232) is further provided with an elastic pin assembly (5), and the positioning turntable (24) is further provided with a plurality of positioning holes (244) along its circumference; when the positioning turntable (24) rotates, the steel balls (51) on the elastic pin assembly (5) can be engaged in or withdrawn from the positioning holes (244).

6. The safety structure on the weight-adjustable dumbbell according to claim 4, characterized in that: A cover (45) is fixedly connected to the end surface of the inner end disk (232) facing the positioning rotary disk (24), and the locking assembly (4) includes a locking block (41), an unlocking block (42) and a locking spring (43) in the cover (45); the locking spring (43) is supported on the locking block (41), and the locking block (41) is provided with a locking shaft (44) extending from the cover (45); the unlocking block (42) is slidably provided on the inner end disk (232) and is wedge-matched with the locking block (41); the unlocking component (13) of the base (1) is a convex block, and when the dumbbell body (2) is placed on the base (1), the convex block acts on the unlocking block (42) and drives the locking shaft (44) on the locking block (41) to retract by pressing against the inclined surface.

7. The safety structure on the weight-adjustable dumbbell according to claim 4, characterized in that: A flange (234) is formed on the edge of the inner end disc (232) extending outward, and the positioning turntable (24) is located inside the flange (234); a gear mark is provided on the outer wall surface of the positioning turntable (24), and a gear through hole (235) for exposing the gear mark is formed on the flange (234) of the inner end disc (232) or on the connecting bridge (233).

8. The safety structure on the weight-adjustable dumbbell according to claim 7, characterized in that: The lower end surface of the flange (234) of the inner end disc (232) is formed with a through hole (236) for the anti-slip hook (12) and the unlocking component (13) on the base (1) to extend into between the inner end disc (232) and the positioning turntable (24); when the dumbbell body (2) is placed on the base (1), the unlocking component (13) on the base (1) extends into the through hole (236) to unlock the locking assembly (4), and at the same time, the anti-slip hook (12) extends into the through hole (236) to hook or release the anti-slip teeth (241) on the edge of the positioning turntable (24).

Images