An adjustable dumbbell

Abstract

The application discloses an adjustable dumbbell, which comprises a set of counterweight dumbbell pieces and an adjusting handle, realizes the setting of the counterweight gear from small to large, cancels the special base and gives up the male and female buckling members on the counterweight dumbbell pieces, and is more compact in the use of the occupied space. The outer circle of the center guide member cooperates with the handle dumbbell support rod, is made of plastic material, so as to avoid the direct contact between the dumbbell support rod and the dumbbell metal, and realizes the anti-wear improvement. The application adopts a safety interlocking extension pin, so that when the gear setting is not in place, the adjusting handle as a whole cannot be moved out of the set of counterweight dumbbell pieces, and safety protection is realized.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of fitness equipment, in particular to an adjustable dumbbell. BACKGROUND

[0002] The existing adjustable dumbbell handle end side of the dumbbell support rod is designed as follows: one, the cross section of the dumbbell support rod is semicircular, and the rotation of the handle is converted into the linear motion of the dumbbell support rod through gear transmission. In order to ensure the strength of the dumbbell support rod, metal material is usually selected, which leads to the gap between the dumbbell support rod and the center hole of the dumbbell becoming larger and larger due to long-term wear and tear. Two, the outer circular surface of the dumbbell support rod is provided with a helical groove, and the helical groove of the dumbbell support rod is driven by the internal thread feature of the handle to realize the linear motion of the dumbbell support rod. The helical groove often occurs jamming phenomenon with the guide feature that prevents the rotation of the dumbbell support rod, resulting in unsmooth rotation of the handle.

[0003] The existing adjustable dumbbell is connected by male and female parts to limit the axial movement and rotational displacement, and the connection relationship is that the handle is matched with the first set of dumbbells, the first set of dumbbells is matched with the second set of dumbbells, and so on. The handle end side of the dumbbell support rod is inserted into the center hole of each dumbbell to limit the normal movement of the dumbbell. Since the male and female parts are used to ensure the close fit of the parts, the gap between the movable dumbbell support rod and the handle body is large, especially when the dumbbell support rod is far away and in cantilever state, the dumbbell support rod is obviously deviated from the center axis of the handle.

[0004] The existing adjustable dumbbell needs to be matched with a special base.

[0005] One of the functions of the special base is to constrain the position of the weight dumbbell set, and the base must be placed on the horizontal working surface, otherwise the position of the remaining weight dumbbell set in the base may be offset after part of the weight dumbbell is taken out by the handle. Once the position of the weight dumbbell set is offset, the weight dumbbell taken out by the handle will not be easily returned to the base.

[0006] The second function of the special base is that the base is matched with the handle to have a locking mechanism. When the handle is located between two gear positions, the base is connected with the handle, and at this time, if the handle is taken out, the handle will take the base and all the weight dumbbell set, so as to prevent misoperation. Only when the handle is rotated to each gear position, the base and the handle are unlocked, and the unlocked handle can take out the corresponding weight dumbbell set.

[0007] The base is an indispensable part of the adjustable dumbbell as a whole, and the base occupies more space. Once the locking of the base fails, the adjustment function of the dumbbell will be lost. SUMMARY

[0008] The adjustable dumbbell has the advantages of simple structure, convenient use, safety and reliability.

[0009] The present application is achieved by the following technical solutions.

[0010] The adjustable dumbbell comprises a weight plate set and an adjusting handle, the weight plate set is composed of a plurality of weight plate pairs, each weight plate pair comprises two weight plates, and a connecting rod is arranged between the two weight plates.

[0011] The weight plate is composed of a plate, a center guide and a plastic frame, the plate has a center hole, the center hole is covered with the plastic center guide, the plate is wrapped with the plastic frame around, and connecting rod holes are arranged on both sides of the plate, a hole is formed in the side wall of the plastic frame to allow the connecting rod hole to pass out, and the two ends of the connecting rod are fixed through the connecting rod holes.

[0012] A protective sleeve is arranged outside the hole in the side wall of the plastic frame, and a connecting rod hole is also arranged on the protective sleeve.

[0013] The adjusting handle comprises two housings, two plate support rods are arranged between the centers of the two housings, a housing connecting rod is arranged between the lower parts of the two housings, an inner thread is arranged in the plate support rod, the two inner threads have opposite rotation directions, a fixed guide strip is arranged on the outer surface of the plate support rod and matches a guide groove in the center hole of the housing, the guide groove restricts the rotational movement of the plate support rod, an axle sleeve mounting seat is arranged on the plate support rod, a limiting axle sleeve is sleeved on the axle sleeve mounting seat, an end cover is arranged on the outer end of the plate support rod, a threaded rod is arranged in the plate support rod, the threaded rod matches the inner thread, that is, the threads on the two sides of the threaded rod have opposite rotation directions, a handle is sleeved on the outer side of the two plate support rods, the limiting axle sleeve is arranged between the plate support rod and the handle, a guide axle sleeve is further arranged between the plate support rod and the handle, the handle comprises a handle metal pipe handle, a pin hole penetrating the center of the threaded rod is arranged in the center part of the threaded rod, a pin shaft passes through the pin hole to connect the threaded rod and the handle metal pipe handle, a plastic handle shell is wrapped on the handle metal pipe handle, a housing axle sleeve base shaft is arranged on the part of the handle metal pipe handle which is not wrapped with the plastic handle shell, a groove is arranged in the center of the plastic handle shell, and a pin shaft cover is arranged in the groove.

[0014] The two ends of the handle are connected with the housings through axle sleeve inserts, the handle is sleeved with a stop ring and a gear position indicator driving gear, a gear position indicator is arranged above the gear position indicator driving gear and engages with the gear position indicator, the gear position indicator is arranged in the housing, a gear position indicator window is arranged on the top surface of the housing and is arranged above the gear position indicator, a stop slide block matching the stop ring is arranged in the housing, an unlocking button is arranged on the inner surface of the housing to restrict the axial rotation of the plate support rod, a guide groove is arranged on the stop slide block, the unlocking button is provided with a step driving the guide groove, and when the unlocking button is pressed down, the step driving the guide groove drives the stop slide block to slide.

[0015] The handle sleeve has a cam, the cam rotates synchronously with the handle; the cam drives the rollers on the slider driving block, so that the slider driving block realizes sliding movement; the slider driving block drives two sliders, the two sliders are on the two sides of the slider driving block; the inner surface of the shell is provided with a transversely arranged groove, and the two sliders are constrained in the movement direction by the groove; the outer side end of each of the two sliders is a safety interlocking extension pin, and a spring is arranged on the safety interlocking extension pin and placed in the groove.

[0016] Further improvement of the present application is that the connecting rod in one pair of counterweight bell pairs is placed at the uppermost position and is the shortest, and the connecting rods in the remaining counterweight bell pairs are arranged in sequence from the lower position and in sequence from the longest to the shortest.

[0017] Compared with the prior art, the present application has the following advantages:

[0018] The present application realizes the setting of the counterweight gear from small to large, cancels the special base and gives up the male and female buckling members on the counterweight bell, and uses a more compact floor space.

[0019] The center guide piece cooperates with the outer circle of the handle bell piece support rod, is made of plastic material, so as to avoid direct contact between the bell piece support rod and the bell piece, realize anti-wear improvement, and improve.

[0020] The present application adopts the safety interlocking extension pin, so that when the gear setting is not in place, the adjusting handle as a whole cannot move out of the counterweight bell piece group, and safety protection is realized.

[0021] The bell piece support rod has a stable extension cantilever structure design, so that the adjusting dumbbell as a whole is more reliable. BRIEF DESCRIPTION OF DRAWINGS

[0022] Fig. 1 is a structural schematic diagram of the present application;

[0023] Fig. 2 is a structural schematic diagram of the counterweight bell piece group;

[0024] Fig. 3 is an exploded view of the counterweight bell pair;

[0025] Figure 4 is an exploded view of the counterweight bell;

[0026] Figure 5 is an exploded view of another embodiment of the counterweight bell;

[0027] Figure 6 is a structural schematic diagram of the adjusting handle;

[0028] Figure 7 is a sectional view of the bell piece support rod sleeved with the handle;

[0029] Figure 8 is an exploded view of the bell piece support rod;

[0030] Figure 9 is a schematic diagram of the internal structure of the adjusting handle;

[0031] Figure 10 is a schematic diagram of the internal structure of the adjusting handle;

[0032] Figure 11 is a schematic diagram of the internal structure of the adjusting handle;

[0033] Figure 12 is a schematic diagram of the internal structure of the adjusting handle;

[0034] Figure 13 is a schematic diagram of the internal structure of the adjusting handle;

[0035] Figure label: 1 - weight bell group, 1-1 - weight bell, 1-1-1 - outer bell, 1-1-2 - center guide, 1-1-3 - inner bell, 1-1-4 - center hole, 1-1-5 - connecting rod hole, 1-1-6 - protective sleeve, 1-1-7 - hole, 1-2 - connecting rod, 2 - adjusting handle, 2-1 - shell, 2-2 - bell support rod, 2-2-1 - internal thread, 2-3 - fixed guide bar, 2-4 - shaft sleeve, 2-5 - end cover, 2-6 - threaded rod, 2-7 - handle, 2-7-1 - metal handle, 2-7-2 - plastic handle shell, 2-7-3 - shell shaft sleeve base shaft, 2-7-4 - pin shaft cover, 2-8 - pin hole, 2-9 - pin shaft, 2-10 - stop ring, 2-11 - gear indicator driving gear, 2-12 - gear indicator, 2-13 - gear indication window, 2-14 - stop block, 2-15 - first spring, 2-16 - unlocking button, 2-17 - shell connecting rod, 2-18 - guide sleeve, 2-19 - sliding drive block, 2-20 - roller, 2-21 - sliding block, 2-22 - groove, 2-23 - safety interlock extension pin, 2-24 - second spring, 2-25 - cam, 2-26 - guide groove, 2-27 - step. DETAILED DESCRIPTION

[0036] In order to make the purpose, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be described clearly and completely below. Obviously, the described embodiments are some of the embodiments of the present application, rather than all the embodiments. The elements and features described in one embodiment of the present application can be combined with the elements and features shown in one or more other embodiments. It should be noted that, for the purpose of clarity, the representations and descriptions of components and processes unrelated to the present application and known to those of ordinary skill in the art are omitted in the description. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative labor fall within the scope of protection of the present application.

[0037] The application is further described below with reference to the drawings:

[0038] An adjustable dumbbell includes a weight plate set 1 and an adjusting handle 2, the weight plate set 1 is composed of a plurality of weight plate pairs, each weight plate pair includes two weight plates 1-1, a connecting rod 1-2 is arranged between the two outer sides of the two weight plates 1-1, a plastic frame 1-1-3 is arranged around the weight plate 1-1-1 to realize damping and guiding, a connecting rod hole 1-1-5 is arranged on the two sides of the weight plate 1-1-1, a hole 1-1-7 is arranged on the side wall of the plastic frame 1-1-3, the hole 1-1-7 is capable of allowing the connecting rod hole 1-1-5 to pass through, and the two ends of the connecting rod 1-2 are fixed through the connecting rod hole 1-1-5. A protective sleeve 1-1-6 is arranged outside the hole on the side wall of the plastic frame 1-1-3, and the protective sleeve 1-1-6 is also provided with a connecting rod hole 1-1-5. The weight plates 1-1 are connected to each other through the connecting rods 1-2, the connecting rods 1-2 are gradually longer from top to bottom, and the weight gears are gradually set from small to large, the special base is cancelled, and the male and female buckling members on the weight plates are abandoned, so that the use occupies more compact space. The connecting rods 1-2 do not contact each other, the weight plates and accessories of each gear do not contact the connecting rods of other gears, the center guide member cooperates with the outer circle of the handle plate support rod to work, the center guide member is made of plastic material to avoid direct contact between the plate support rod and the plate, and wear resistance is improved.

[0039] The adjusting handle 2 includes two housings 2-1, two plate support rods 2-2 are arranged between the centers of the two housings 2-1, a housing connecting rod 2-17 is arranged between the lower parts of the two housings 2-1, an internal thread 2-2-1 is arranged in the plate support rod 2-2, the two internal threads 2-2-1 are opposite in rotation direction, a fixed guide strip 2-3 is arranged on the outer surface of the plate support rod 2-2, and the fixed guide strip 2-3 is matched with a guide groove in the center hole of the housing 2-1, a shaft sleeve mounting seat is arranged on the plate support rod 2-2, a limiting shaft sleeve 2-4 is sleeved on the shaft sleeve mounting seat, an end cover 2-5 is arranged on the outer end of the plate support rod 2-2, a threaded rod 2-6 is arranged in the plate support rod 2-2, the threaded rod 2-6 is matched with the internal thread 2-2-1, that is, the threads on the two sides of the threaded rod 2-6 are opposite in rotation direction, a handle 2-7 is sleeved on the outer side of the two plate support rods 2-2, the limiting shaft sleeve 2-4 is arranged between the plate support rod 2-2 and the handle 2-7, a guide shaft sleeve 2-18 is further arranged between the plate support rod 2-2 and the handle 2-7, the handle 2-7 includes a handle metal pipe handle 2-7-1, a pin hole 2-8 penetrating the center is arranged on the center part of the threaded rod 2-6, and a pin shaft 2-9 passes through the pin hole 2-8 to connect the threaded rod 2-6 and the handle metal pipe handle 2-7-1.

[0040] The inner thread of the bell piece support rod is matched with the threaded rod to realize the movement driving. The bell piece support rod adopts metal base material, and the outer side is wrapped with plastic sheath. The plastic sheath of the bell piece support rod is provided with a guide feature, which is matched with the fixed guide feature (guide groove) on the handle shell to constrain the rotary movement of the bell piece support rod. The outer circular surface of the bell piece support rod is also provided with a shaft sleeve mounting seat feature, which is matched with the inner circular surface of the handle metal pipe grip.

[0041] The threaded rod is provided with a pin hole penetrating the center, which connects the threaded rod with the handle metal pipe grip through the pin shaft, and realizes the movement synchronization of the two.

[0042] The grip is made of metal hollow pipe, and the inner circular surface is matched with the outer circular surface of the bell piece support rod. When the grip is rotated to drive the bell piece support rod to move, the guide shaft sleeve slides axially in the inner circular surface of the grip. The outer circular surface of the handle metal pipe grip can be wrapped with plastic grip shell to improve the hand feeling. The part without plastic wrapping is provided with a shell sleeve base shaft (outer circular surface feature) matched with the sleeve insert in the inner side shell of the handle to make the handle rotate smoothly. The handle metal pipe grip is provided with a limiting sleeve on each side end surface, which fills the gap between the inner circular surface of the handle metal pipe grip and the outer circular surface of the bell piece support rod, and is used for improving the auxiliary support of the bell piece support rod in the cantilever state, so that the bell piece support rod always maintains good coaxiality with the handle center shaft. The limiting sleeve step is constrained by the shell on the end surface of the handle metal pipe grip and cannot move axially, so that the guide shaft sleeve on one side of the outer circular surface of the bell piece support rod can prevent the bell piece support rod from being pulled out of the adjusting handle.

[0043] Both ends of the handle 2-7 are connected to the housing 2-1 via bushing inserts. The handle 2-7 is fitted with a stop ring 2-10 and a gear indicator drive gear 2-11. A gear indicator 2-12 meshes with the gear indicator drive gear 2-11 and is located inside the housing 2-1. A gear indicator window 2-13 is located on the top surface of the housing 2-1, positioned above the gear indicator 2-12. A stop slider 2-14 that matches the stop ring 2-10 is located inside the housing 2-1. An unlocking button 2-16 that restricts the axial rotation of the bell support rod is located on the inner surface of the housing 2-1. A first spring 1 is fitted around the lower part of the unlocking button 2-16. 5. The stop slider 2-14 is provided with a guide groove 2-26, and the unlock button 2-16 is provided with a step 2-27 that drives the guide groove. When the unlock button 2-16 is pressed down, the step 2-27 drives the stop slider 2-14 to slide. The gear indicator drives the gear on the gear indicator through a gear indicator drive gear connected to the grip, so that the gear indication is synchronized with the rotation of the grip. The gear indicator window is located in the center of the top surface of the housing and is made of transparent resin, which can both observe the movement of the handle and prevent foreign objects from entering the housing. The handle is stopped by a stop ring on the grip. When the stop slider matches the stop ring, the stop ring is locked by the slider and cannot rotate. The unlock button is located on one side of the top surface of the housing. When the button is pressed down, the grip can rotate freely to drive the movement of the bell support rod and the gear setting.

[0044] When the button is pressed, the step on the button drives the stop slider to slide; after sliding a certain distance, the stop ring unlocks; after the handle is turned to each position, releasing the button will cause the button and the stop slider to automatically reset under the action of spring force; when the handle is between two positions, the button (the small cylindrical step on the side, which can be a roller or a waist-shaped boss, etc.) is restricted from moving by the guide groove of the stop slider, and the button cannot reset at this time. Only by turning the handle to the next adjacent position can the stop slider and the stop ring lock, and the button can reset.

[0045] A cam 2-25 is fitted onto the handle 2-7, and the cam 2-25 rotates synchronously with the handle 2-7. The cam 2-25 drives the roller 2-20 on the slider drive block 2-19, causing the slider drive block 2-19 to slide. The slider drive block 2-19 drives two sliders 2-21, which are located on both sides of the slider drive block 2-19. The inner surface of the housing 2-1 is provided with a transversely arranged groove 2-22, which constrains the movement direction of the two sliders 2-21. The outer ends of the two sliders 2-21 are both safety interlocking extension pins 2-23, and a second spring 2-24 is provided on the safety interlocking extension pin 2-23. The second spring 2-24 can be set on the upper or lower surface of the safety interlocking extension pin 2-23, or it can be fitted onto the safety interlocking extension pin 2-23 and placed in the groove 2-22.

[0046] Rotating the handle 2-7, the handle 2-7 drives the cam 2-10 to drive the roller 2-12, the roller 2-12 drives the driving slider 2-11 to move, the driving slider 2-11 pushes the slider 2-13 with the safety interlock extension pin 2-15 out of the shell 2-1; the spring 2-16 pushes the slider 2-13 and the safety interlock extension pin 2-15 back into the shell 2-1, the slider 2-13 pushes the driving slider 2-11 to reset, and the roller 2-12 falls into the stroke track feature of the cam 2-10.

[0047] It should be understood, of course, that the foregoing relates to merely illustrative embodiments of the application, but not specifically limited thereto in scope. Various changes might be made in the process, devices, methods, and steps described herein without departing from the spirit and scope of the application as defined by the following claims. In addition, although the application has been described in reference to particular illustrative embodiments thereof, it is to be understood that a wide number of changes, modifications and alterations in the embodiments described and implied therein can be made without departing from the spirit and scope of the application. Accordingly, the scope of the application should be determined by the following claims.

Claims

1. An adjustable dumbbell, comprising a weight plate assembly (1) and an adjusting handle (2), characterized in that: The adjusting handle (2) is placed inside the counterweight bell set (1); the counterweight bell set (1) consists of multiple counterweight bell pairs, each pair including two counterweight bells (1-1), and a connecting rod (1-2) is provided between the two counterweight bells (1-1). The connecting rod (1-2) in one pair of counterweight bell pairs is located at the top and is the shortest. The connecting rods (1-2) in the other pairs of counterweight bell pairs are positioned downwards and increase in length until the connecting rod (1-2) at the bottom is the longest; the counterweight bell (1-1) consists of a bell (1-1-1), a central guide (1-1-2), and a plastic frame (1-1-3). A central hole (1-1-4) is provided, and a plastic central guide (1-1-2) is provided on the central hole (1-1-4). The bell (1-1-1) is surrounded by a plastic frame (1-1-3). Connecting rod holes (1-1-5) are provided on both sides of the bell (1-1-1). The side wall of the plastic frame (1-1-3) has a hole (1-1-7) that allows the connecting rod hole (1-1-5) to pass through. The two ends of the connecting rod (1-2) are fixed through the connecting rod hole (1-1-5). A protective sleeve (1-1-6) is provided on the outside of the hole on the side wall of the plastic frame (1-1-3). The protective sleeve (1-1-6) also has a connecting rod hole (1-1-5). The adjusting handle (2) includes two housings (2-1). Two bell support rods (2-2) are provided between the centers of the two housings (2-1). A housing connecting rod (2-17) is provided between the lower parts of the two housings (2-1). The bell support rods (2-2) are provided with internal threads (2-2-1), and the two internal threads (2-2-1) rotate in opposite directions. The outer surface of the bell support rods (2-2) is provided with a fixed guide strip (2-3), which matches the guide groove of the center hole of the housing (2-1). A bushing mounting seat is provided on the bell support rods (2-2), and a limit bushing (2-4) is fitted on the bushing mounting seat. An end cap (2-5) is provided at the outer end of the bell support rods (2-2). The device includes a threaded rod (2-6) that matches the internal thread (2-2-1), meaning the threads on both sides of the threaded rod (2-6) rotate in opposite directions. A handle (2-7) is fitted around the two bell support rods (2-2). A limiting sleeve (2-4) is positioned between the bell support rods (2-2) and the handle (2-7). A guide sleeve (2-18) is also provided between the bell support rods (2-2) and the handle (2-7). The handle (2-7) includes a metal tube handle (2-7-1), which is covered by a plastic handle shell (2-7-2). The portion of the metal tube handle (2-7-1) not covered by the plastic handle shell has a shell sleeve. The base shaft (2-7-3) and the plastic grip shell (2-7-2) have a groove in the center, and a pin cover (2-7-4) is installed in the groove. The threaded rod (2-6) has a pin hole (2-8) in the center that penetrates the shaft. The pin (2-9) passes through the pin hole (2-8) to connect the threaded rod (2-6) to the metal tube handle (2-7-1). The two ends of the handle (2-7) are connected to the shell (2-1) through bushing inserts. The handle (2-7) is fitted with a stop ring (2-10) and a gear indicator drive gear (2-11). A gear indicator (2-12) that meshes with the gear indicator drive gear (2-11) is provided above it. The gear indicator (2-12) is located in the shell (2-1). Inside, the top surface of the housing (2-1) is provided with a gear position indicator window (2-13), which is located above the gear position indicator (2-12). Inside the housing (2-1), there is a stop slider (2-14) that matches the stop ring (2-10). The inner surface of the housing (2-1) is provided with an unlocking button (2-16) that restricts the axial rotation of the bell support rod. The lower part of the unlocking button (2-16) is fitted with a first spring (15). The stop slider (2-14) is provided with a guide groove (2-26). The unlocking button (2-16) is provided with a step (2-27) that drives the guide groove. When the unlocking button (2-16) is pressed down, the step (2-27) drives the stop slider (2-14) to slide. A cam (2-25) is fitted on the handle (2-7), and the cam (2-25) rotates synchronously with the handle (2-7). The cam (2-25) drives the roller (2-20) on the slider drive block (2-19), so that the slider drive block (2-19) can slide. The slider drive block (2-19) drives two sliders (2-21), which are located on both sides of the slider drive block (2-19). The inner surface of the housing (2-1) is provided with a transversely arranged groove (2-22), and the movement direction of the two sliders (2-21) is constrained by the groove (2-22). The outer ends of the two sliders (2-21) are both safety interlocking extension pins (2-23), and a second spring (2-24) is provided on the safety interlocking extension pin (2-23). ​​The second spring (2-24) is placed in the groove (2-22).

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