Three-in-one fitness device

Abstract

The present invention proposes a three-in-one fitness device, including a weight box with a box-shaped structure and capable of containing a weight body inside. One end of the weight box has a first installation position for installing a handle, so that the fitness device can be used as a kettlebell; the bottom center position of the weight box has a second installation position for connecting a rod-shaped grip, so that the fitness device can be used as a dumbbell or a barbell; the present invention adopts the weight box as a basic component, and a handle, a short rod or a long rod can be installed according to user needs to facilitate fitness activities with kettlebells, dumbbells or barbells. It has the advantage of diverse functions and adopts a locking device to achieve rapid assembly of the box body and the box base, which can facilitate users to quickly disassemble and assemble the box body and the box base, and improve the assembly speed when the dumbbell or barbell is converted into a kettlebell.

Description

Technical Field

[0001] The present invention relates to the technical field of fitness equipment, and in particular to a three-in-one fitness device. Background Art

[0002] Dumbbells, kettlebells, and barbells are all common fitness equipment. Long-term use can effectively strengthen arm and chest muscles, making them popular among fitness enthusiasts. However, individual dumbbells, kettlebells, or barbells currently have problems such as fixed appearance and structure, single function, incompatibility of components, and inability to adjust weight.

[0003] In order to solve the above technical problems, the prior art also appears to assemble dumbbells, kettlebells and barbells in different ways to meet their respective fitness needs. For example, Chinese utility model patent application number 201921294793.7 discloses a non-cast, assembleable multi-purpose kettlebell. However, in this solution, when dumbbells or barbells are needed for fitness, the spherical devices at both ends are in a constant weight state and the weight cannot be adjusted according to demand, resulting in the inability to meet the user's fitness needs for different weights. For another example, Chinese utility model patent application number 201120551185.7 discloses a multifunctional combination kettlebell, which also uses a combination method to assemble different equipment. However, when the kettlebell is converted into a dumbbell, the two hemispheres on the outside of the kettlebell need to be disassembled, resulting in long assembly time and complicated disassembly and assembly, which is very inconvenient. Summary of the Invention

[0004] The present invention proposes a three-in-one fitness device to solve the problems of the existing fitness equipment mentioned in the above background art, such as single function, inconvenient assembly and disassembly, and complicated weight adjustment.

[0005] The technical solution of the present invention is achieved as follows:

[0006] A three-in-one fitness device includes a weight box with a box-like structure and capable of containing a weight body. One end of the weight box has a first mounting position for mounting a handle, so that the fitness device can be used as a kettlebell; the center position of the bottom of the weight box has a second mounting position for connecting a rod-shaped grip, so that the fitness device can be used as a dumbbell or a barbell.

[0007] Preferably, the counterweight box includes a box body and a box base that are detachably connected, a threaded rod is provided at the center position of the box base, the upper end of the threaded rod extends to a position above the box body, and a locking device is provided on the box body that can connect the threaded rod to lock the box body and the box base.

[0008] Preferably, the locking device includes a lock tongue arranged around the threaded rod, which can rotate around the center of the threaded rod and can move horizontally. The lock tongue is connected to the box body, and an annular groove is opened at the outer diameter position of the threaded rod. The end of the lock tongue can be inserted into the annular groove to realize the connection between the box body and the threaded rod.

[0009] Preferably, the locking device also includes a knob for driving the lock tongue to rotate around the center of the threaded rod. The knob is located above the box body and is threadedly connected to the box body. A limit plate connected to the knob is provided inside the box body. A lock body is installed between the limit plate and the knob. The lock tongue is slidably installed inside the lock body. When the knob is rotated, the lock tongue can be driven to rotate around the center of the threaded rod.

[0010] Preferably, the middle position of the upper end of the box body has an inwardly recessed step portion, the knob is located at the step portion and is connected to the internal thread on the step portion, and a downwardly protruding limiting ridge is provided below the step portion, the limiting ridge has a force-applying end tangent to the inner diameter of the step portion, and a force-releasing end away from the center hole of the step portion, and the force-applying end and the force-releasing end have a smooth transition, and the lock tongue can contact the force-applying end and the force-releasing end of the limiting ridge in sequence during the rotation around the center of the box body, thereby realizing the horizontal movement of the lock tongue.

[0011] Preferably, the locking tongue has a driving end in contact with the limiting ridge and a locking end away from the driving end, and the locking end can be clamped into the annular groove at the upper end of the threaded rod when it moves horizontally to the extreme position close to the center line of the box body.

[0012] Preferably, the box base includes a base lower cover and a base upper cover, the base lower cover and the base upper cover are connected by screws, the bottom of the threaded rod is connected to a positioning plate, the positioning plate is located between the base lower cover and the base upper cover, and the threaded rod is set through the base upper cover.

[0013] Preferably, the first installation position is a screw hole provided on both sides of the counterweight box.

[0014] Preferably, the second installation position is a connection hole opened in the center of the lower cover of the base, and the connection hole is a threaded hole.

[0015] Preferably, the rod-shaped holding member is a short rod, including a connecting rod, both ends of the connecting rod have limit heads that can be inserted into the limit holes inside the threaded rod to achieve synchronous rotation, both ends of the connecting rod have grooves arranged in a ring shape, and both ends of the connecting rod are equipped with rotatable locking nuts, and limit screws are installed in the radial position of the locking nut, and the limit screws extend into the groove. The locking nut is installed at the second installation position at the bottom of the counterweight box by a threaded connection. A holding rod is sleeved on the middle position of the connecting rod, and a center rod is installed at the center position of the connecting rod. Both ends of the center rod extend to the center position of the threaded rod.

[0016] Preferably, the rod-shaped gripping member further includes an extension rod connected to the short rod.

[0017] By adopting the above technical solution, the beneficial effects of the present invention are:

[0018] (1) The present invention uses a counterweight box as a basic component, and can be installed with a handle, a short rod or a long rod according to user needs to facilitate fitness activities with kettlebells, dumbbells or barbells, and has the advantage of diverse functions.

[0019] (2) The present invention adopts a locking device to realize the rapid assembly of the box body and the box base, which can facilitate users to quickly realize the disassembly and assembly of the box body and the box base. On the one hand, when converting from a dumbbell or a barbell to a kettlebell, the kettlebell can be quickly assembled, saving time. On the other hand, when used as a dumbbell or a barbell, the box body can be quickly disassembled according to user needs, which has the advantage of convenient disassembly and assembly, and satisfies the user's need to eliminate the structure of the box body when performing dumbbell or barbell activities.

[0020] (3) The present invention sets the counterweight body on the threaded rod, which makes it easy for users to replace the number of counterweights and meet the user's fitness needs for different counterweights. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 The three-dimensional weight box of the present invention Figure 1 ;

[0022] Figure 2 The three-dimensional weight box of the present invention Figure 2 ;

[0023] Figure 3 This is an exploded view of the weight box of the present invention;

[0024] Figure 4 is a cross-sectional view of the counterweight box of the present invention;

[0025] Figure 5 The three-dimensional box body of the present invention Figure 1 ;

[0026] Figure 6 The three-dimensional box body of the present invention Figure 2 ;

[0027] Figure 7 The explosion diagram of the locking device of the present invention is as follows: Figure 1 ;

[0028] Figure 8 The explosion diagram of the locking device of the present invention is as follows: Figure 2 ;

[0029] Figure 9The explosion of the box base of the present invention Figure 1 ;

[0030] Figure 10 The explosion of the box base of the present invention Figure 2 ;

[0031] Figure 11 A three-dimensional diagram of the threaded rod of the present invention

[0032] Figure 12 A three-dimensional cross-sectional view of the threaded rod of the present invention

[0033] Figure 13 A perspective view of the present invention in use as a kettlebell;

[0034] Figure 14 A perspective view of the present invention used as a dumbbell;

[0035] Figure 15 A perspective view of the present invention used as a barbell;

[0036] Figure 16 It is an exploded view of the short rod of the present invention.

[0037] in:

[0038] 1. Base cover; 101. Connecting hole; 2. Threaded rod; 201. Positioning plate; 2011. Slot; 202. Ring groove; 203. Limiting hole; 3. Base cover; 301. Groove; 302. Threaded column; 4. Counterweight; 5. Nut 1; 6. Nut 2; 601. Screw hole; 7. Box body; 701. Step; 702. Internal thread; 703. Limiting ridge; 7031. Force-applying end; 7032. Release end; 8. Limit Position plate; 9. Spring; 10. Lock tongue; 1001. Drive end; 1002. Locking end; 11. Lock body; 1101. Baffle; 12. Knob; 1201. Upper shell; 1202. Lower shell; 13. Handle; 14. Short rod; 1401. Connecting rod; 1402. Groove; 1403. Limit head; 1404. Center rod; 1405. Lock nut; 1406. Limit screw; 1407. Grip; 15. Extension rod. Implementation Method

[0039] The embodiments of the present invention will be further described below with reference to the accompanying drawings:

[0040] like Figure 1-16As shown, a three-in-one fitness device includes a weight box with a box-like structure and capable of containing a weight body 4 therein. One end of the weight box has a first mounting position for mounting a handle 13, so that the fitness device can be used as a kettlebell; specifically, the first mounting position is a screw hole 601 provided on both sides of the weight box. In this example, nuts 6 are fixed on both sides of the inside of the weight box, and the handle 13 can be mounted to the screw hole 601 on the nut 6 by bolts, thereby mounting the handle 13 on the weight box and using it as a kettlebell for fitness.

[0041] The center of the bottom of the weight box has a second mounting position that can be connected to a rod-shaped grip so that the fitness device can be used as a dumbbell or a barbell, wherein the second mounting position is a connecting hole 101 opened in the center of the base lower cover 1, and the connecting hole 101 is a threaded hole.

[0042] Specifically, the counterweight box includes a box body 7, a box base, a threaded rod 2 and a locking device. The box body 7 is located above the box base, and the threaded rod 2 is installed on the box base and the upper end extends above the box body 7. The counterweight body 4 can be sleeved on the outside of the threaded rod 2 and locked by a nut 15. By changing the number of counterweight bodies 4, the overall counterweight of the fitness device can be changed. The counterweight body 4 is locked by a nut 15, and there is a rubber pad between the nut 15 and the topmost counterweight body 4 to avoid the counterweight body 4 from shaking inside the box body 7. The locking device is located at the upper end of the box body 7 and is connected to the threaded rod 2 to realize the connection between the box body 7 and the box base; more specifically, one side surface of the counterweight body 4 has a raised cylindrical protrusion, and the other side surface has a concave groove corresponding to the cylindrical protrusion. The cylindrical protrusion can be inserted into the groove, which can avoid the problem of relative rotation between two adjacent counterweight bodies 4 and further improve the assembly stability of the counterweight 4.

[0043] Specifically, the box base includes a base lower cover 1 and a base upper cover 3, the base lower cover 1 and the base upper cover 3 are connected by screws, and the bottom of the threaded rod 2 is connected to a positioning plate 201, which is located between the base lower cover 1 and the base upper cover 3, and the threaded rod 2 is arranged through the base upper cover 3. More specifically, the threaded rod 2 is integrally connected with the positioning plate 201 below, and the positioning plate 201 can be placed in a groove 301 at the center position below the base upper cover 3, and a threaded column 302 for connecting the base lower cover 1 is provided at the edge position of the groove 301, and a card groove 2011 matching the threaded column 302 is provided at the edge position of the positioning plate 201, and the card groove 2011 is limited to the rotation of the positioning plate 201 relative to the base upper cover 3, so that the threaded rod 2 only has the freedom of axial movement in the groove 301, and the threaded rod 2 can be fixed after the base lower cover 1 and the base upper cover 3 are connected with screws.

[0044] Specifically, the locking device includes a knob 12 located above the box body 7, and the knob 12 includes an upper shell 1201 and a lower shell 1202. The upper shell 1201 and the lower shell 1202 are synchronously rotated and connected. The lower end of the knob 12 is connected to the lock body 11. In this example, the lock body 11 is integrally connected to the bottom of the lower shell 1202. A lock tongue 10 that can move in the horizontal direction is provided in the lock body 11. In this example, the number of the lock body 11 and the lock tongue 10 are both two, and they are evenly distributed around the center of the knob 12 to improve the working performance when locking; the knob 12 The lower end is also connected to a limit plate 8, which is located inside the box body 7. More specifically, a baffle 1101 is provided on one side of the lock body 11. After the lock tongue 10 is placed inside the lock body 11, a spring 9 is provided between the baffle 1101 and the lock tongue 10. One end of the spring 9 contacts the step in the middle of the lock tongue 10, and the other end abuts against the inner side surface of the baffle 1101. The inner end of the lock tongue 10 passes through the small hole on the baffle 1101 and can be inserted into the annular groove 202 of the threaded rod 2. When the lock tongue 10 is in a free state, the spring 9 drives the lock tongue 10 to the external limit position.

[0045] Specifically, the middle position of the upper end of the box body 7 has an inwardly concave step portion 701, the edge of the step portion 701 is provided with an internal thread 702 connected to the knob 12 (upper shell 1201), and a downwardly protruding limiting ridge 703 is provided below the step portion 701. The limiting ridge 703 has a force-applying end 7031 tangent to the inner diameter of the step portion 701 and a loosening end 7032 away from the center hole of the step portion 701. The force-applying end 7031 and the loosening end 7032 have a smooth transition, and the lock tongue 1 During the rotation around the center of the box body 7, the force-applying end 7031 and the force-releasing end 7032 of the limiting ridge 703 can be contacted in sequence, thereby realizing the horizontal movement of the lock tongue 10. The lock tongue 10 has a driving end 1001 in contact with the limiting ridge 703 and a locking end 1002 away from the driving end 1001. When the locking end 1002 moves horizontally to the extreme position close to the center line of the box body 7, it can be stuck in the annular groove 202 at the upper end of the threaded rod 2, thereby achieving the locking effect of the threaded rod 2.

[0046] Among them, the limiting plate 8 is connected to the knob 12 by bolts. Specifically, the limiting plate 8, the lower shell 1202 and the upper shell 1201 are connected by bolts to achieve synchronous rotation connection of the three. The limiting plate 8 is located below the step portion 701, which can further prevent the lock body 11 and the lock tongue 10 from moving in the vertical direction, and also prevent the knob 12 from detaching from the box body 7. When the knob 12 is rotated, on the one hand, the knob 12 cooperates with the internal thread 702 to achieve the connection between the knob 12 and the box body 7, and on the other hand, drives the lock body 11, the lock tongue 10 and the limiting plate 8 to rotate. During the rotation process, the driving end 1001 of the lock tongue 10 gradually approaches the force-applying end 7031 of the limiting ridge 703, thereby making The lock tongue 10 moves horizontally toward the center of the box body 7. When it reaches the extreme position, the locking end 1002 of the lock tongue 10 can be stuck in the annular groove 202 on the threaded rod 2, thereby locking the threaded rod 2 and completing the connection between the box body 7 and the box base. When rotated in the opposite direction, the knob 12 cooperates with the internal thread 702 to separate from the box body 7. On the other hand, under the action of the spring 9, the lock tongue 10 makes the driving end 1001 gradually approach the loose end 7032 of the limiting ridge 703, so that the locking end 1002 of the lock tongue 10 is disengaged from the annular groove 202 on the threaded rod 2. At this time, the box body 7 is separated from the box base, and the user can replace the counterweight 4.

[0047] Specifically, the rod-shaped gripping piece is a short rod 14, including a connecting rod 1401. Both ends of the connecting rod 1401 have a limiting head 1403 that can be inserted into the limiting hole 203 inside the threaded rod 2 to achieve synchronous rotation. The limiting head 1403 of the connecting rod 1401 and the limiting hole 203 on the threaded rod 2 both have a regular polyhedron structure in cross-section. More specifically, a regular octahedron is used in this example to avoid the problem of relative rotation of the connecting rod 1401 when inserted into the threaded rod 2.

[0048] Both ends of the connecting rod 1401 have an annular groove 1402, and both ends of the connecting rod 1401 are installed with a rotatable locking nut 1405. The locking nut 1405 is radially installed with a limit screw 1406, and the limit screw 1406 extends into the groove 1402. The locking nut 1405 is installed at the second installation position at the bottom of the counterweight box by a threaded connection. Such an arrangement allows the locking nut 1405 to only have the freedom to rotate relative to the connecting rod 1401. When the locking nut 1405 is connected to the second installation position at the bottom of the counterweight box, the connecting rod 1401 and the counterweight box can be connected. 101) is provided with a rubber ring at the root position, which allows the locking nut 1405 to fit tightly against the rubber ring during the locking process, thereby ensuring a firm connection and preventing shaking; a grip rod 1407 is sleeved on the middle position of the connecting rod 1401, and a center rod 1404 is installed at the center position of the connecting rod 1401. Both ends of the center rod 1404 extend to the center position of the threaded rod 2. The center rod 1404 and the grip rod 1407 can be connected to the connecting rod 1401 in a fixed connection manner. The center rod 1404 serves to further guide and reinforce the short rod 14, and the grip rod 1407 protects the center rod 1404 and can be replaced after a period of use.

[0049] Specifically, the rod-shaped gripping member further includes an extension rod 15 connected to the short rod 14. The extension rod 15 is connected to the short rod 14 in a threaded manner, thereby further increasing the overall length of the rod-shaped gripping member, so that the fitness device can be used as a barbell.

[0050] This three-in-one fitness device has three functions:

[0051] (1) When used as a kettlebell, handles 13 are installed on both sides of the weight box by bolt connection, and the user can perform kettlebell fitness exercises by holding the handles 13;

[0052] (2) When used as a dumbbell, the handle 13 can be removed or not, and the dumbbell can be assembled by connecting a short rod 14 between two weight boxes. The user can hold the short rod 14 to perform dumbbell fitness. In addition, according to user needs, the box body 7 can be removed, and only the box base can be retained to expose the weight body 4 to meet user needs.

[0053] (3) When used as a barbell, the handle 13 can be removed or not removed, or the box body 7 can be removed or not removed. The length of the rod-shaped grip can be increased by adding an extension rod 15 between the two short rods 14 to perform barbell fitness exercises.

[0054] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A three-in-one fitness device, characterized by: The invention comprises a weight box having a box-like structure and capable of containing a weight body (4) therein, wherein one end of the weight box has a first mounting position capable of mounting a handle (13), so that the fitness device can be used as a kettlebell; and a second mounting position capable of connecting a rod-shaped gripping member is provided at the center of the bottom of the weight box, so that the fitness device can be used as a dumbbell or a barbell; The counterweight box comprises a detachably connected box body (7) and a box base, a threaded rod (2) being provided at the center of the box base, the upper end of the threaded rod (2) extending to a position above the box body (7), and a locking device being provided on the box body (7) capable of connecting the threaded rod (2) to lock the box body (7) and the box base; The locking device comprises a locking tongue (10) arranged around the threaded rod (2), rotatable around the center of the threaded rod (2) and capable of horizontal movement, the locking tongue (10) being connected to the box body (7), and an annular groove (202) being provided at the outer diameter position of the threaded rod (2), the end of the locking tongue (10) being capable of being inserted into the annular groove (202) to achieve connection between the box body (7) and the threaded rod (2); The locking device further comprises a knob (12) for driving the locking tongue (10) to rotate around the center of the threaded rod (2); the knob (12) is located above the box body (7) and is threadedly connected to the box body (7).

2. The three-in-one fitness device according to claim 1, characterized in that: A limit plate (8) connected to a knob (12) is provided inside the box body (7), a lock body (11) is installed between the limit plate (8) and the knob (12), and a lock tongue (10) is slidably installed inside the lock body (11). When the knob (12) is rotated, the lock tongue (10) can be driven to rotate around the center of the threaded rod (2).

3. The three-in-one fitness device according to claim 1, characterized in that: The middle position of the upper end of the box body (7) is provided with an inwardly recessed step portion (701), the knob (12) is located at the step portion (701) and is connected to the internal thread (702) on the step portion (701), and a downwardly protruding limiting ridge (703) is provided below the step portion (701), the limiting ridge (703) has a force-applying end (7031) tangent to the inner diameter of the step portion (701), and a force-releasing end (7032) away from the center hole of the step portion (701), the force-applying end (7031) and the force-releasing end (7032) transitioning smoothly, and the lock tongue (10) can sequentially contact the force-applying end (7031) and the force-releasing end (7032) of the limit ridge (703) during the process of rotating around the center of the box body (7), thereby realizing the movement of the lock tongue (10) in the horizontal direction.

4. The three-in-one fitness device according to claim 1, characterized in that: The locking tongue (10) has a driving end (1001) in contact with the limiting ridge (703) and a locking end (1002) away from the driving end (1001). When the locking end (1002) moves horizontally to a limit position close to the center line of the box body (7), it can be clamped into the annular groove (202) at the upper end of the threaded rod (2).

5. The three-in-one fitness device according to claim 1, characterized in that: The box base comprises a base lower cover (1) and a base upper cover (3), wherein the base lower cover (1) and the base upper cover (3) are connected by screws, and a positioning plate (201) is connected to the bottom of the threaded rod (2), and the positioning plate (201) is located between the base lower cover (1) and the base upper cover (3), and the threaded rod (2) is arranged to pass through the base upper cover (3).

6. The three-in-one fitness device according to claim 1, characterized in that: The first mounting position is a screw hole (601) provided on both sides of the counterweight box, and the second mounting position is a connection hole (101) provided in the center of the base lower cover (1), and the connection hole (101) is a threaded hole.

7. The three-in-one fitness device according to claim 1, characterized in that: The rod-shaped gripping member is a short rod (14) comprising a connecting rod (1401). Both ends of the connecting rod (1401) are provided with limiting heads (1403) capable of being inserted into the limiting holes (203) inside the threaded rod (2) to achieve synchronous rotation. Both ends of the connecting rod (1401) are provided with rotatable locking nuts (1405). The locking nuts (1405) are installed at the second installation position at the bottom of the counterweight box by means of a threaded connection.

8. The three-in-one fitness device according to claim 1, characterized in that: The rod-shaped gripping member further includes an extension rod (15) connected to the short rod (14).

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