Patent Description:
Dumbbells are widely used as fitness equipment, and particularly, weight-adjustable dumbbells are favoured by many fitness enthusiasts. A user needs to frequently adjust different weights or different numbers of dumbbell plates to realize various weight adjustments. But when the user uses an adjustable dumbbell, the user needs to frequently adjust different weights to meet the requirements of exercises. There are gaps between the dumbbell plates and a dumbbell bar assembly. During exercise time, because of inertia, the dumbbell plates and the dumbbell bar assembly move up and down relatively, the dumbbell plates also move left and right when the user does arm lift exercises, so the user feels insecure. Further, the user has to suffer from the impact of movement of the dumbbell plates and always worries about the falling risk of the dumbbell plates. The concentration of exercise is affected.

The present invention aims to provide an adjustable dumbbell to realize no moving and reduce disturbance of movement of dumbbell plates to users when dumbbell plates are connected to a dumbbell bar assembly.

To achieve this goal, the present invention solves the posed problem by the features of claim <NUM>. Accordingly, :
an adjustable dumbbell includes a dumbbell bar assembly and a plurality of dumbbell plates hooked to two sides of the dumbbell bar assembly. Inserting plate assemblies for being inserted into insertion ports of the dumbbell plates and limiting the dumbbell plates to rotate are disposed at two ends of the dumbbell bar assembly. The inserting plate assemblies are provided with damping block mounting holes, and the damping block mounting holes form third open slots at bottoms of the inserting plate assemblies. Damping blocks are installed in the damping block mounting holes. Bottoms of the damping blocks penetrate through the third open slots to abut against bottoms of the insertion ports of the dumbbell plates. The damping blocks can offset relative displacement of the dumbbell plates and the inserting plate assemblies through elastic deformation to reduce movement of the dumbbell plates and resonance between the dumbbell plates and the inserting plate assemblies in the using process, and consequently, user experience can be improved.

Further, the dumbbell bar assembly includes a bearing bar set. A casing is sleeved outside the bearing bar set. An outer wall of the bearing bar set is provided with protruding strips. The protruding strips abut against an inner wall of the casing. On the premise of not impeding sliding of the bearing bar set in the casing, movement of the bearing bar set inside the casing is reduced.

Further, the bearing bar set includes a left rack bearing bar and a right rack bearing bar which are identical in shape and size, and a spur gear shaft. The spur gear shaft is hinged to the interior of the casing. The left rack bearing bar and the right rack bearing bar are meshed with the spur gear shaft for transmission in the casing. A left rack part and a right rack part are respectively arranged on opposite sides of the left rack bearing bar and the right rack bearing bar, and a left bearing part and a right bearing part are respectively arranged on back sides of the left rack bearing bar and the right rack bearing bar. A plurality of protruding strips are arranged and respectively located on surfaces of the left bearing part and the right bearing part.

Further, the left rack part and the right rack part are respectively provided with sliding grooves. The right rack bearing bar is provided with a sliding block corresponding to the sliding groove of the left rack bearing bar. Similarly, the left rack bearing bar is provided with a sliding block corresponding to the sliding groove of the right rack bearing bar. The corresponding sliding blocks slide in the corresponding sliding grooves respectively. It can be ensured that the two rack bearing bars are adjusted smoothly and movements of the bearing bars is reduced.

Further, the inserting plate assemblies include hollow inserting plates, the hollow inserting plates are used to be inserted into the insertion ports of the dumbbell plates, the insertion ports are arranged in a V shape, and correspondingly, cross-sections of the hollow inserting plates are arranged in a V shape matched with the insertion ports in shape and size so that the hollow inserting plates are more closely matched with inner walls of the insertion ports of the dumbbell plates when the hollow inserting plates are inserted into the insertion ports, and gaps between the hollow inserting plates and the insertion ports are reduced. The hollow inserting plates are closely matched with the dumbbell plates to reduce the phenomena of the dumbbell plates moving left and right on the inserting plate assemblies.

Further, tops of the inserting plate assemblies are provided with first open slots communicating with internal parts thereof. The bearing bar set is provided with an adjusting handle. The adjusting handle penetrates through the corresponding first open slot to be fixedly connected with the bearing bar set. Positioning racks are arranged at the first open slots. Each of the positioning racks is provided with a plurality of positioning teeth. Correspondingly, a bottom end of the adjusting handle is provided with a positioning part matched with the positioning racks. When the positioning part is located at tooth roots of the positioning teeth, the adjusting handle is locked.

Further, the adjusting handle includes a hollow adjusting handle housing and a bolt. A nut part of the bolt is installed inside the adjusting handle housing in a limited manner, a screw of the bolt partially penetrates out of a bottom of the adjusting handle housing to be in threaded connection with the bearing bar set. A spring is sleeved on the bolt. One end of the spring abuts against a bottom end of the nut part of the bolt, and the other end of the spring abuts against a bottom side of an inner wall of the adjusting handle housing. Thus, the adjusting handle can automatically fall into a corresponding adjusting position under the action of restoring force of the spring when lifted upwards, thereby preventing the dumbbell plates from falling due to the fact that the adjusting handle gets stuck between two adjusting positions.

Further, the left rack bearing bar, the right rack bearing bar and the spur gear shaft are meshed and installed inside the casing. A tube wall of the casing is respectively provided with communicating ports corresponding to the left bearing part of the left rack bearing bar and the right bearing part of the right rack bearing bar so that the left bearing part and the right bearing part are hooked to the dumbbell plates through the communicating ports.

Further, the dumbbell bar assembly comprises a hollow tube, the hollow tube is sleeved outside the casing, and a rubber grip tube is sleeved on an outer side of the hollow tube. The hollow tube is disposed between the grip tube and the casing to facilitate force control at the grip tube.

Further, grip counterweights are fixedly connected to ends of the two inserting plate assemblies respectively to increase the weight of the dumbbell bar assembly without the dumbbell plates hooked and increase forms of exercise without the dumbbell plates hooked.

Based on the analysis, the present invention discloses an adjustable dumbbell. Protruding strips are disposed inside a dumbbell bar assembly to reduce movement between a bearing bar set and a casing. In addition, inserting plate assemblies are arranged in the same V-shaped structure as that of insertion ports of dumbbell plates to reduce movement between the inserting plate assemblies and the dumbbell plates. Damping blocks are installed in the inserting plate assemblies and abut against bottoms of the insertion ports of the dumbbell plates so that movement of the dumbbell plates and resonance between the dumbbell plates and the inserting plate assemblies are reduced in the using process, thereby reducing fear of the user in the using process and helping the user to focus on the training process.

Drawings constituting a portion of the present application are used for providing a further understanding of the present invention. Schematic embodiments of the present invention and descriptions thereof are intended to explain the present invention and are not construed to unduly limit this invention. In the drawings:.

Brief descriptions of the drawings: <NUM>-dumbbell bar assembly; <NUM>-bearing bar set; <NUM>-left rack bearing bar; <NUM>-left bearing part; <NUM>-left rack part; <NUM>-right rack bearing bar; <NUM>-right bearing part; <NUM>-right rack part; <NUM>-spur gear shaft; <NUM>-adjusting handle; <NUM>-adjusting handle housing; <NUM>-bolt; <NUM>-cover cap; <NUM>-spring; <NUM>-positioning part; <NUM>-sliding groove; <NUM>-sliding block; <NUM>-protruding strips; <NUM>-casing; <NUM>-communicating port; <NUM>-guide slot; <NUM>-inserting plate assembly; <NUM>-hollow inserting plate; <NUM>-baffle; <NUM>-first open slot; <NUM>-centre through hole; <NUM>-second open slot; <NUM>-damping block mounting hole; <NUM>-third open slot; <NUM>-positioning rack; <NUM>-damping block; <NUM>-grip counterweight; <NUM>-end cap; <NUM>-hollow tube; <NUM>-grip tube; <NUM>-dumbbell plate; <NUM>-insertion port; <NUM>-hooking groove; <NUM>-base.

The present invention will be described in detail below regarding the accompanying drawings and examples. Each example is provided by way of an explanation of the present invention, not a limitation of the present invention. In fact, those skilled in the art will recognize that modifications and variations can be made in the present invention without departing from the scope of the invention. For example, features illustrated or described as part of one embodiment can be used on another embodiment to yield a still further embodiment. Therefore, it is intended that the present invention includes such modifications and variations as come within the scope of the appended claims.

In the description of the present invention, the orientations or positional relationships indicated by the terms "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", etc. are based on the orientations or positional relationships shown in the drawings and are only for the convenience of describing the present invention, rather than requiring that the present invention must be constructed and operated in a specific orientation, so they cannot be interpreted as limitations to the present invention. The terms "linked", "connected" and "arranged" used in the present invention should be understood in a broad sense, for example, it can be a fixed connection or a detachable connection, it can be directly connected or indirectly connected through an intermediate component, and it also can be a wired connection, a radio connection, or a wireless communication signal connection. Those of ordinary skill in the art can understand the specific meanings of the above terms in the present invention according to specific situations.

One or more examples of the present invention are illustrated in the accompanying drawings. Like or analogous numerals in the drawings and description have been used to refer to like or analogous parts of the present invention. As used herein, the terms "first", "second", and "third" are used interchangeably to distinguish one element from another, and are not intended to indicate the location or importance of individual elements.

As shown in <FIG>, according to the embodiments of the present invention, an adjustable dumbbell is provided, which includes a dumbbell bar assembly <NUM>, eight dumbbell plates <NUM> used to be hooked to two sides of the dumbbell bar assembly <NUM>, and a base <NUM> used for placing the dumbbell plates <NUM>.

The dumbbell bar assembly <NUM> includes a bearing bar set <NUM>. The bearing bar set <NUM> includes a left rack bearing bar <NUM> and a right rack bearing bar <NUM> which are identical in shape and size, and a spur gear shaft <NUM> which is arranged between the left rack bearing bar <NUM> and the right rack bearing bar <NUM> and is meshed with the left rack bearing bar <NUM> and the right rack bearing bar <NUM> for transmission. A left bearing part <NUM> and a left rack part <NUM> are respectively arranged at two sides of the left rack bearing bar <NUM>. A right bearing part <NUM> and a right rack part <NUM> are respectively arranged at two sides of the right rack bearing bar <NUM>. The spur gear shaft <NUM> is meshed with the left rack part <NUM> and the right rack part <NUM> for transmission separately. When the left rack bearing bar <NUM> slides leftwards or rightwards, the right rack bearing bar <NUM> synchronously slides leftwards or rightwards relative to the left rack bearing bar <NUM>. An adjusting handle <NUM> is fixedly installed at one end of an upper surface of the left rack bearing bar <NUM> and used for manually operating and moving the left rack bearing bar <NUM>. the left rack part <NUM> of the left rack bearing bar <NUM> and the right rack part <NUM> of the right rack bearing bar <NUM> are respectively provided with sliding grooves <NUM>. The right rack bearing bar <NUM> is provided with a sliding block <NUM> corresponding to the sliding groove <NUM> of the left rack bearing bar <NUM>. Similarly, the left rack bearing bar <NUM> is provided with a sliding block <NUM> corresponding to the sliding groove <NUM> of the right rack bearing bar <NUM>. The corresponding sliding blocks <NUM> slide in the sliding grooves <NUM> to ensure that the left rack bearing bar <NUM> and the right rack bearing bar <NUM> are adjusted smoothly and movement between the bearing bars is reduced.

The dumbbell bar assembly <NUM> further includes a casing <NUM>. The left rack bearing bar <NUM>, the right rack bearing bar <NUM> and the spur gear shaft <NUM> are meshed and installed inside the casing <NUM>, and a tube wall of the casing <NUM> is respectively provided with communicating ports <NUM> corresponding to the left bearing part <NUM> of the left rack bearing bar <NUM> and the right bearing part <NUM> of the right rack bearing bar <NUM> so that the left bearing part <NUM> and the right bearing part <NUM> are hooked to the dumbbell plates <NUM> through the communicating ports <NUM>. The tube wall of the casing <NUM> is provided with a guide slot <NUM> corresponding to the position of the adjusting handle <NUM> on the left rack bearing bar <NUM> so that the adjusting handle <NUM> can slide in the guide slot <NUM> along the axial direction of the casing <NUM>.

To reduce movement of the bearing bar set <NUM> in the casing <NUM>, a surface of the left bearing part <NUM> of the left rack bearing bar <NUM> and a surface of the right bearing part <NUM> of the right rack bearing bar <NUM> are respectively provided with three protruding strips <NUM>. The protruding strips <NUM> abut against an inner wall of the casing <NUM>. On the premise of not impeding sliding of the bearing bar set <NUM> in the casing <NUM>, movement of the bearing bar set <NUM> inside the casing <NUM> is reduced.

Open insertion ports <NUM> are formed in the middles of the dumbbell plates <NUM>. A hooking groove <NUM> is formed at one side of each of the insertion ports <NUM>. The bearing bar set <NUM> is inserted through the insertion ports <NUM>. When the left bearing part <NUM> or the right bearing part <NUM> is located in the hooking grooves <NUM>, the bearing bar set <NUM> can hook the corresponding dumbbell plates <NUM>.

Two ends of a combined part of the bearing bar set <NUM> and the casing <NUM> after installation are respectively and fixedly provided with one inserting plate assembly <NUM> used for being inserted into the dumbbell plates <NUM>. Each of the inserting plate assemblies <NUM> includes a hollow inserting plate <NUM>, and baffles <NUM> are respectively arranged at two ends of the hollow inserting plate <NUM>. When the hollow inserting plate <NUM> is inserted through the insertion ports <NUM> of the dumbbell plates <NUM>, the multiple dumbbell plates <NUM> are placed between the two baffles <NUM> on the hollow inserting plate <NUM>. A top of the hollow inserting plate <NUM> is provided with a first open slot <NUM> communicating with internal parts thereof. A centre through hole <NUM> running through the hollow inserting plate <NUM> and the baffles <NUM> at the two ends thereof is formed in a middle position of the hollow inserting plate <NUM>. The centre through hole <NUM> runs through the hollow inserting plate <NUM> to form a second open slot <NUM> in a plate surface of one side of the hollow inserting plate <NUM>. The first open slot <NUM> communicates with the centre through hole <NUM>. The two inserting plate assembles <NUM> are sleeved at the two ends of the combined part of the bearing bar set <NUM> and the casing <NUM> after installation through the centre through holes <NUM>. Opening directions of the second open slots <NUM> of the two inserting plate assemblies <NUM> are opposite at installation time so that the second open slots <NUM> correspond with the communicating ports <NUM> of the casing <NUM>, and the bearing parts of the bearing bar set <NUM> penetrate through the corresponding second open slots <NUM> to hook the dumbbell plates <NUM>. Meanwhile, the guide slot <NUM> of the casing <NUM> corresponds to the first open slot <NUM>, so that the adjusting handle <NUM> adjusts the bearing bar set <NUM> at an outer side of the corresponding inserting plate assembly <NUM> through the first open slot <NUM>. Damping block mounting holes <NUM> running through the hollow inserting plates <NUM> and the baffles <NUM> at the two ends thereof are further formed in positions, located below the centre through holes <NUM>, of the inserting plate assemblies <NUM>. The damping block mounting holes <NUM> form third open slots <NUM> at bottom sides of the hollow inserting plates <NUM>. Damping blocks <NUM> are installed in the damping block mounting holes <NUM>. The damping blocks <NUM> are made of a material with cushioning and vibration-damping effects. When the inserting plate assemblies <NUM> are inserted into the insertion ports <NUM> of the dumbbell plates <NUM>, bottoms of the damping blocks <NUM> abut against bottoms of the insertion ports <NUM> through the third open slots <NUM>. When the dumbbell plates <NUM> and the inserting plate assemblies <NUM> do relative movement under the action of inertia in the using process, the damping blocks <NUM> can offset relative displacement of the dumbbell plates <NUM> and the inserting plate assemblies <NUM> through elastic deformation, thereby reducing movement of the dumbbell plates <NUM> and resonance between the dumbbell plates <NUM> and the inserting plate assemblies <NUM> in the using process, and improving user experience.

To further reduce movement between the inserting plate assemblies <NUM> and the dumbbell plates <NUM>, as shown in <FIG>, the insertion ports <NUM> of the dumbbell plates <NUM> are arranged in a V shape, and correspondingly, cross-sections of the hollow inserting plates <NUM> are arranged in a V shape matched with the insertion ports <NUM> in shape and size so that the hollow inserting plates <NUM> are more closely matched with inner walls of the insertion ports <NUM> of the dumbbell plates <NUM> when the hollow inserting plates <NUM> are inserted into the insertion ports <NUM>, thereby reducing gaps between the hollow inserting plates <NUM> and the insertion ports <NUM>, and reducing phenomena of left-right movement of the dumbbell plates <NUM> on the inserting plate assemblies <NUM>.

To avoid falling when the user uses a dumbbell to exercise, positioning racks <NUM> are arranged at the position of the first open slots <NUM> on the inserting plate assemblies <NUM> and used to lock the corresponding sliding position of the adjusting handle <NUM>. Each positioning rack <NUM> is provided with four teeth corresponding to four adjusting positions. Every time the adjusting handle <NUM> moves by one adjusting position, correspondingly, one hooked dumbbell plate <NUM> is increased or decreased at left and right ends of the bearing bar set <NUM> respectively.

Shown in <FIG>, the adjusting handle <NUM> includes a hollow adjusting handle housing <NUM> and a bolt <NUM>. The bolt <NUM> is installed inside the adjusting handle housing <NUM>. A screw of the bolt <NUM> partially penetrates out of a bottom of the adjusting handle housing <NUM> to be in threaded connection with the left rack bearing bar <NUM>. A cover cap <NUM> is arranged at an upper end of the adjusting handle housing <NUM>. When the cover cap <NUM> is covered at an upper end of the adjusting handle housing <NUM>, a nut part of the bolt <NUM> is limited inside the adjusting handle housing <NUM>, further, a spring <NUM> is sleeved on the bolt <NUM>, one end of the spring <NUM> abuts against a bottom end of the nut part of the bolt <NUM>, and the other end of the spring <NUM> abuts against a bottom side of an inner wall of the adjusting handle housing <NUM>. When the adjusting handle housing <NUM> is lifted, the spring <NUM> is compressed. When the adjusting handle housing <NUM> is loosened, the adjusting handle housing <NUM> moves downwards under the action of restoring force of the spring <NUM>. Further, tops of the four teeth of each positioning rack <NUM> are provided with smooth round corners. A bottom end of an outer side of the adjusting handle housing <NUM> is provided with a positioning part <NUM> matched with the positioning racks <NUM>. When the positioning part <NUM> is located at tooth roots of the positioning teeth, the adjusting handle is locked. Further, a bottom end of the positioning part <NUM> has a round corner so that the adjusting handle <NUM> can slide between adjusting positions on the positioning racks <NUM>. When the adjusting handle <NUM> is lifted up and loosened, the adjusting handle <NUM> automatically falls into the corresponding adjusting position under the action of restoring force of the spring <NUM>, thereby preventing the dumbbell plates <NUM> from falling due to the fact that the adjusting handle <NUM> gets stuck between two adjusting positions.

The dumbbell bar assembly <NUM> further includes a hollow tube <NUM>. The hollow tube <NUM> is sleeved outside the casing <NUM>. A rubber grip tube <NUM> is sleeved on an outer side of the hollow tube <NUM>. The hollow tube <NUM> is arranged between the grip tube <NUM> and the casing <NUM> to facilitate force control at the grip tube <NUM>.

Further, grip counterweights <NUM> are fixedly connected to ends of the two inserting plate assemblies <NUM> respectively to increase the weight of the dumbbell bar assembly <NUM> without the dumbbell plates <NUM> hooked and increase forms of exercise without the dumbbell plates hooked. End caps <NUM> are fixedly connected to ends of the grip counterweights <NUM> and used for concealing cap screws at the ends of the grip counterweights <NUM> so that the dumbbell overall looks more attractive.

The adjustable dumbbell further includes a base <NUM>. The base <NUM> is provided with a plurality of dumbbell plate grooves for placing the multiple dumbbell plates <NUM> to facilitate insertion of the dumbbell bar assembly <NUM> and weight adjustment.

From the above description, it can be seen that the foregoing embodiments of the present invention achieve the following technical effects:.

Compared with the prior art, when the adjustable dumbbell of the present invention is used, movement inside the dumbbell bar assembly and movement at joints between the dumbbell bar assembly and the dumbbell plates are small, and the fear of the user in the using process is reduced, so the user can concentrate on the training process.

Claim 1:
An adjustable dumbbell, comprising a dumbbell bar assembly (<NUM>) and a plurality of dumbbell plates (<NUM>) hooked to two sides of the dumbbell bar assembly (<NUM>), characterized in that, inserting plate assemblies (<NUM>) for being inserted into insertion ports (<NUM>) of the dumbbell plates (<NUM>) and limiting the dumbbell plates (<NUM>) to rotate are disposed at two ends of the dumbbell bar assembly (<NUM>), characterized in that the inserting plate assemblies (<NUM>) are provided with damping block mounting holes (<NUM>), the damping block mounting holes (<NUM>) form third open slots (<NUM>) at bottoms of the inserting plate assemblies (<NUM>), damping blocks (<NUM>) are installed in the damping block mounting holes (<NUM>), and bottoms of the damping blocks (<NUM>) abut against bottoms of the insertion ports (<NUM>) of the dumbbell plates (<NUM>) through the third open slots (<NUM>).