Dumbbell piece, dumbbell and processing method of dumbbell piece

Abstract

The invention belongs to the technical field of fitness equipment, and particularly relates to a dumbbell piece, a dumbbell and a processing method of the dumbbell piece, the dumbbell piece comprises a flexible main body, the middle of the flexible main body is a through hole, the side edge of the flexible main body is provided with a filling channel, and the filling channel is communicated with an inner cavity of the flexible main body and the outside; the filling channel can be sealed by the plug to form a closed filling space; the filler can enter the filling space through the filling channel; the filling space is not filled with the filler, and the filler can move in the filling space; the inner cavity of the flexible body can be inflated through the filling channel, and the filling space is kept in an expanded state. The invention provides a dumbbell piece which is safe to use and has elasticity, a dumbbell and a processing method of the dumbbell piece.

Description

Technical Field

[0001] The invention belongs to the technical field of fitness equipment, and particularly relates to a dumbbell sheet, a dumbbell and a processing method of the dumbbell. Background Art

[0002] As people's living standards continue to improve, their desire for fitness and strengthening their bodies has also become increasingly strong, and they need to use a variety of fitness equipment. Fitness equipment is often divided into two categories, single-function and comprehensive multi-function, according to the number of training functions. Dumbbells are widely used as a type of fitness equipment. At present, most dumbbells on the market are made of pure metal. Dumbbells are made into different weight specifications to achieve different training requirements. There are also products that change the weight by replacing different dumbbell plates to meet the actual needs of trainers. With the evolution of dumbbell products, in response to actual user needs, some of the current dumbbells are designed with soft materials or cast iron dumbbells are coated with plastic or plastic layers to achieve changes in the soft properties of the appearance. The purpose is to avoid damage to the body or surrounding equipment during exercise, and the internal fillings can be replaced as needed to meet the unique needs of male or female athletes.

[0003] For example, Chinese patent CN202310187472.1 discloses a soft dumbbell, which includes a dumbbell body and a handle. A rigid inner core is provided inside the handle, and a grip is provided around the rigid inner core. A thick-diameter joint is provided at the left and right ends of the grip. The dumbbell body is a hollow airbag structure, and an injection hole is provided on its outer wall. The injection hole is inlaid with an end plug, and an air nozzle module is provided inside the center of the end plug. A through hole is provided in the fixed groove, and the through hole is connected through the air nozzle module. The rigid inner core is combined with the grip by thermoplastic coating, and the anti-slip protrusion is used to prevent the two from slipping after being combined. The dumbbell body is fed to the inside through the end plug, and the injection hole is blocked after feeding, which can realize solid-state support. Furthermore, tapered pull rods are provided on the left and right sides of the rigid inner core to extend to the inside of the dumbbell body. On the premise of ensuring the softness of the outer periphery of the dumbbell body, its internal horizontal axial strength is effectively improved, which can prevent the dumbbell bodies at the left and right ends from sagging and collapsing. This product provides a better flexible dumbbell, giving users a better experience. If the dumbbell accidentally slips and hits the user's feet, it will not cause serious damage, and it can also reduce damage to the ground. However, this product also has certain shortcomings: the weight is limited by the factory, the user cannot adjust the weight of the dumbbell, and the drooping on both sides cannot be solved, the drooping can only be reduced, and the product is not very beautiful. Summary of the invention

[0004] The invention aims to provide a dumbbell plate which is safe to use and has elasticity and a dumbbell thereof.

[0005] The object of the present invention is achieved in that:

[0006] A dumbbell plate includes a flexible body, a through hole in the middle of the flexible body, a perfusion channel arranged on the side of the flexible body, the perfusion channel connecting the inner cavity of the flexible body with the outside; a fixed plug can seal the perfusion channel and form a closed filling space; a filler can enter the filling space through the perfusion channel; the inner cavity of the flexible body can be inflated through the perfusion channel, and the filling space can be kept in an expanded state. The perfusion channel includes a positioning plug, the middle of the positioning plug has a channel for installing the fixed plug, the positioning plug is tightly connected to the flexible body to form a whole; the hardness of the positioning plug is greater than that of the flexible body, and the positioning plug is preferably made of a hard material.

[0007] Preferably, the flexible body is integrally formed with a skirt, the skirt is wrapped around the outside of the positioning plug, the skirt has an opening or a gap, and the filler and gas can pass through the positioning plug and the skirt into the inner cavity of the flexible body.

[0008] Preferably, the fixed plug is a flexible member, and an annular convex edge is provided on the side of the fixed plug. The fixed plug enters the perfusion channel and is in a sealed state, and the annular convex edge is deformed and tightly fitted on the inner wall of the perfusion channel.

[0009] Preferably, a blind hole is provided on the inner side of the fixed plug, which provides space for the fixed plug to deform inward, and the annular convex edge deforms and forces the blind hole to reduce or partially close; the diameter of the annular convex edge is larger than the perfusion channel, and the fixed plug is pushed into the perfusion channel, and the annular convex edge tilts along the entry direction.

[0010] Preferably, the diameter of the lower end of the annular protrusion is larger than the diameter of the upper end of the annular protrusion.

[0011] Preferably, the flexible body is ring-shaped when inflated, and the outer surface of the flexible body is a continuous arc when inflated.

[0012] A dumbbell comprises dumbbell plates and a dumbbell rod, wherein both ends of the dumbbell rod are provided with threaded sections, each threaded section can hold at least two dumbbell plates, an internal thread matched with the threaded section is provided in the middle of a stopper, and the stopper is threadedly connected to the threaded section and abuts against the rear of the dumbbell plate.

[0013] Preferably, in the inflated state, the inner diameter of the middle through hole of the dumbbell piece is larger than the maximum outer diameter of the threaded section; when the stopper is tightened, the dumbbell piece is deformed laterally, the inner diameter of the middle through hole of the dumbbell piece is reduced, and the dumbbell piece abuts against the outer surface of the threaded section. The dumbbell rod is provided with a baffle on the side of the threaded section, and the dumbbell piece abuts against the baffle.

[0014] A dumbbell plate processing method, the dumbbell plate processing steps are as follows: the first step, a core is arranged in the middle of a vinyl mold, a positioning plug is set on the core, a thermoplastic material is placed in the vinyl mold, and is hot-melted and shaped together with the core to form a flexible body;

[0015] The second step is to take out the shaped flexible body, the temperature of which is greater than 50 degrees Celsius, and quickly insert the shaped plug into the positioning plug after the flexible body is taken out from the enamel mold;

[0016] In the third step, after the flexible body is cooled, the shaping plug is pried out, and the filling material is poured into the flexible body through the channel of the positioning plug by the pouring machine;

[0017] The fourth step is to inflate the positioning plug until the flexible body bulges; then push the fixed plug into the positioning plug; the fixed plug and the shaping plug have the same shape and material.

[0018] A through hole is arranged in the middle of the shaped plug.

[0019] Before perfusing the filler, the perfusion channel is punctured with a perfusion needle to ensure that the perfusion channel is unobstructed.

[0020] Compared with the prior art, the present invention has the following outstanding and beneficial technical effects:

[0021] 1. The present invention adopts a flexible body as the main part of the dumbbell plate, fills the flexible body with fillers and inflates the flexible body to form an elastic dumbbell plate. Preferably, the dumbbell plate is annular, and the user can put the dumbbell plate on the dumbbell bar for exercise, or hold the dumbbell plate for load exercise. The entire dumbbell plate is an inflatable flexible part, so its safety is guaranteed. The dumbbell plate will not cause excessive damage to the user's body, feet, etc. when it hits the user from a high place. The user can choose one or more dumbbell plates according to actual needs for moderate exercise, providing more exercise methods.

[0022] 2. The perfusion channel of the present invention is composed of a tightly connected flexible main body skirt and a positioning plug. The skirt is wrapped around the outer edge of the positioning plug. The tightly connected manner prevents air leakage between the positioning plug and the flexible main body. The positioning plug is made of hard material. The positioning plug made of hard material can be directly sealed by a flexible fixed plug. The flexible fixed plug is deformed in the positioning plug and seals the perfusion channel. Preferably, the flexible main body and the positioning plug are integrally formed by a gluing process. The skirt of the flexible main body may seal the channel of the positioning plug in the flexible main body, affecting the entry of the filler into the flexible main body and also affecting the inflation of the flexible main body. Therefore, before the filling is injected, it is necessary to ensure that the perfusion channel is unobstructed by means of insertion, and the perfusion channel can be punctured by means of injection.

[0023] 3. The inner diameter of the middle through hole of the dumbbell plate of the present invention is larger than the outer diameter of the threaded section, so the user can easily put the dumbbell plate on the dumbbell rod. When the user tightens the block, the dumbbell plate is deformed under the push of the block, and the inner diameter of the middle through hole of the dumbbell plate is reduced, so that the dumbbell plate can be effectively placed on the dumbbell rod. The installed dumbbell plate does not shake and has a stable structure.

[0024] 4. After the gluing process is completed, the hot flexible body is taken out and the shaping plug is quickly inserted into the positioning plug, and then the flexible body is waited for natural cooling. Under the action of thermal expansion and contraction, the positioning plug is formed into the best state to cooperate with the shaping plug, so as to wait for the replacement of the fixed plug with the same material and shape. The channel of the positioning plug is pre-shaped by the shaping plug, so that the fixed plug and the positioning plug can achieve effective sealing, and the inflated dumbbell piece can be kept in a filled state for a long time without leaking air or filling. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a schematic diagram of the structure of the dumbbell piece of the present invention;

[0026] Figure 2 It is a schematic diagram of the internal structure of the dumbbell plate of the present invention;

[0027] Figure 3 yes Figure 2 A schematic diagram of the enlarged structure at point A;

[0028] Figure 4 It is a structural schematic diagram of a fixed plug of the present invention;

[0029] Figure 5 It is a schematic diagram of the internal structure of the fixed plug of the present invention;

[0030] Figure 6 It is a schematic diagram of the dumbbell structure of the present invention;

[0031] Figure 7 It is a schematic diagram of the internal structure of a dumbbell in which the dumbbell pieces of the present invention are not squeezed;

[0032] Figure 8 yes Figure 7 A schematic diagram of the enlarged structure at B;

[0033] Fig. 9 It is a schematic diagram of the internal structure of a dumbbell in which the dumbbell pieces of the present invention are squeezed;

[0034] Fig.10 yes Fig. 9 Enlarged structural diagram at C.

[0035] In the figure: 1-flexible body; 1a-filling space; 11-through hole; 12-skirt; 121-gap; 13-positioning plug; 14-infusion channel; 19-filler; 2-fixed plug; 21-annular flange; 22-blind hole; 3-dumbbell rod; 31-blocking piece; 32-threaded section; 4-blocking block; L-gap between dumbbell piece and threaded section. DETAILED DESCRIPTION

[0036] The present invention will be further described below with reference to specific embodiments of the present invention. Figure 1-10 As shown:

[0037] A dumbbell plate includes a flexible body 1, a through hole 11 in the middle of the flexible body 1, and a perfusion channel 14 is arranged on the side of the flexible body 1, and the perfusion channel 14 connects the inner cavity of the flexible body and the outside; a fixed plug 2 can seal the perfusion channel 14 and form a closed filling space 1a; a filler 19 can enter the filling space 1a through the perfusion channel 14; if the filler does not fill the filling space, the dumbbell plate cannot be filled with the filler inside, and once it is filled, the deflexion effect is lost; and if there is too much filler, the flexible body is prone to explosion and damage during the de-inflation process. The filler can be a commonly used counterweight object such as sand, iron sand, rubber, liquid, etc.; the manufacturer can fill the flexible body 1 with fillers 19 of different weights according to actual requirements, and the filler does not need to fill the filling space, and the weight of a single dumbbell plate can be freely controlled within the range of 0.5-5kg. The inner cavity of the flexible body 1 can be inflated through the perfusion channel 14, and the filling space is kept in an expanded state. In the inflated state, the filler in the filling space can flow under the action of gravity. Users can use dumbbells for exercise alone, or assemble them into dumbbells as described below. The specific exercise method is determined by the user. The dumbbells are continuous as a whole, preferably in a ring shape, and the flexible body is in a continuous arc shape when inflated, which provides a good hand-held experience. The soft rubber material also has an anti-slip effect, and the user has a good grip experience. As a user, the dumbbells can be placed on the elastic rope for weight-bearing exercise, and the specific exercise methods are diverse.

[0038] The perfusion channel includes a positioning plug 13, and the middle part of the positioning plug 13 has a channel for installing a fixed plug. The positioning plug 13 is tightly connected with the flexible body 1 to form a whole; the hardness of the positioning plug 13 is greater than that of the flexible body 1. The positioning plug 13 is hard under normal conditions, so the flexible fixed plug 2 can seal the middle channel of the positioning plug. Preferably, the positioning plug 13 and the flexible body 1 have been hot-melted to form a whole during the processing and manufacturing process, and the flexible body is integrally formed with a skirt 12, which is covered on the outside of the positioning plug 13. The skirt 12 has an opening or a gap 121, and the filler and gas can pass through the positioning plug and the skirt to enter the inner cavity of the flexible body.

[0039] The fixed plug 2 is a flexible member, and an annular convex edge 21 is provided on the side of the fixed plug 2. The fixed plug 2 enters the perfusion channel and is in a sealed state. The annular convex edge 21 is deformed and tightly fitted on the inner wall of the perfusion channel 14.

[0040] The fixed plug 2 is provided with a blind hole 22 inside, and the blind hole 22 provides space for the fixed plug to deform inwardly, and the annular convex edge 21 deforms and forces the inner diameter of the blind hole 22 to decrease or partially close; Figure 3 As shown, the diameter of the annular convex edge is larger than the perfusion channel, the fixed plug 2 is pushed into the perfusion channel 14, and the annular convex edge 21 tilts along the entry direction. The tilted annular convex edge has a better sealing effect and prevents the fixed plug from detaching from the perfusion channel.

[0041] The diameter of the lower end of the annular projection is larger than the diameter of the upper end of the annular projection. The purpose of setting this structure is that when the fixed plug is inserted into the perfusion channel, the entire fixed plug enters the perfusion channel. The diameter of the upper end of the annular projection is smaller, and the blind hole at this position will not be completely closed. Workers can insert tools into the blind hole to pry out the plug and replace the fixed plug.

[0042] A dumbbell includes dumbbell plates and a dumbbell rod 3. The two ends of the dumbbell rod 3 are provided with threaded sections 32. Each threaded section 32 can hold at least two dumbbell plates. The middle of the stopper 4 is provided with an internal thread matched with the threaded section 32. The stopper 4 is threadedly connected to the threaded section 32 and abuts against the rear of the dumbbell plate. The user can put an appropriate number of dumbbell plates on the dumbbell rod according to actual needs, so as to achieve the desired exercise effect.

[0043] In the inflated state, the inner diameter of the middle through hole of the dumbbell piece is larger than the maximum outer diameter of the threaded section. Figure 8As shown, when the dumbbell pieces are not squeezed, the gap between the dumbbell pieces is L, and by setting the gap, the user can easily install and remove the dumbbell pieces. The dumbbell rod is provided with a baffle 31 on the side of the threaded section, and the dumbbell pieces abut against the baffle 31. When a dumbbell piece is set on the threaded rod, the block is tightened, the dumbbell piece is pressed between the block and the block, and the dumbbell piece is deformed, the inner diameter of the middle through hole of the dumbbell piece is reduced, and the dumbbell piece is against the outer surface of the threaded section, so the two sides and the through hole position of the flexible dumbbell piece are restricted, the dumbbell piece is stably fixed, and the constrained dumbbell piece will not shake; if two dumbbell pieces are set on the threaded rod, the block is tightened, the two dumbbell pieces are pressed between the block and the block, and the dumbbell pieces and the dumbbell pieces are squeezed against each other, and at the same time, the dumbbell pieces are deformed, the inner diameter of the middle through hole of the dumbbell piece is reduced, and the dumbbell pieces are against the outer surface of the threaded section, the two sides and the through hole position of the two dumbbell pieces are restricted, the dumbbell pieces are stably fixed, and the constrained dumbbell pieces will not shake. Moreover, the dumbbell piece itself is made of flexible material and has a large friction resistance, and the dumbbell under the state of tightening the block has a stable structure. As a preference, the baffle 31 can be a feature integrally formed on the dumbbell bar, or can be an independent component, which is determined by the manufacturer. The flexible body is preferably made of PVC material, but can also be made of other soft materials.

[0044] A method for processing dumbbell plates, the dumbbell plate processing steps are as follows: the first step is to set a core in the middle of the vinyl mold, set a positioning plug on the core, place the thermoplastic material in the vinyl mold, and perform hot melt shaping together with the core to form a flexible body. The vinyl mold is not marked in the attached figure, and the vinyl mold is made by an outsourced mold manufacturer. We need to inform the outsourced manufacturer of the size required by the flexible body 1, and the outsourced manufacturer will make it according to the actual size. The vinyl mold needs to be integrally formed with a core, and the core is preferably located on the peripheral side of the vinyl mold.

[0045] In the second step, the shaped flexible body 1 is taken out. The temperature of the taken out flexible body is greater than 50 degrees Celsius. After the flexible body is taken out from the enamel mold, the shaping plug is quickly inserted into the positioning plug 13; when the flexible body is still in a high temperature state, the worker can easily insert the shaping plug into the positioning plug. After the flexible body is cooled, under the action of thermal expansion and contraction, the positioning plug is formed into the best state to cooperate with the shaping plug. After the positioning plug is physically contracted, it is tightly matched with the shaping plug. When the shaping plug is not subjected to external force, the outer diameter of the shaping plug is larger than the inner diameter of the positioning plug, and the shaping plug is inserted into the positioning plug to maintain a contracted deformation state.

[0046] The third step is to pry out the shaping plug and use the filling machine to pour the filler into the flexible body 1 through the channel of the positioning plug. The filling machine is a non-standard machine and an outsourced equipment. The equipment is not the protection point of this application, so no figure is provided. The equipment is simply understood as a filling device with a weighing function. The worker puts the filler into the storage funnel. A filling needle is provided under the equipment. The filling needle can enter the filling channel. When the filling needle enters the filling channel, the filling channel can be opened, so that the filler can enter the flexible body 1 through the discharge needle. The worker starts the switch of the filling equipment, and a certain amount of filler enters the flexible body.

[0047] The fourth step is to inflate the positioning plug 13 until the flexible body 1 bulges; then push the fixed plug 2 into the positioning plug 13; the fixed plug and the shaping plug have the same shape and material. The positioning plug's channel is used for both inflation and pouring of fillers. Workers need to be careful when inserting the positioning plug's channel and try not to damage the inner wall of the positioning plug's channel. Preferably, the outer wall of the positioning plug is textured, which is conducive to the close connection between the positioning plug and the flexible body during the gluing process; the internal channel of the positioning plug is not smooth, which increases friction and is conducive to the tight fit of the positioning plug and the shaping plug.

[0048] A through hole is provided in the middle of the shaping plug. When the shaping plug is inserted, the entire flexible body still maintains a high temperature state. The inside of the flexible body and the outside world need to be connected through the through hole in the middle of the shaping plug. The flexible body will not expand internally during the cooling process, and the inner side of the flexible body will not deform unevenly, ensuring that the flexible body maintains a ring shape. Of course, if the inner wall of the flexible body is thicker and not easy to deform, the shaping plug may not be provided with a through hole. The manufacturer decides whether to provide a through hole for the shaping plug based on actual conditions, and preferably uses a shaping plug provided with a through hole.

[0049] The above embodiments are only preferred embodiments of the present invention and are not intended to limit the protection scope of the present invention. Therefore, any equivalent changes made based on the structure, shape, and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A dumbbell plate, characterized in that: The invention comprises a flexible body (1), the middle of the flexible body (1) is a through hole, the side of the flexible body (1) is provided with a perfusion channel (14), the perfusion channel connects the inner cavity of the flexible body and the outside; a fixed plug can seal the perfusion channel and form a closed filling space (1a); a filler (19) can enter the filling space (1a) through the perfusion channel (14); the inner cavity of the flexible body (1) is inflated, and the filling space is kept in an expanded state; The perfusion channel (14) comprises a positioning plug (13), the middle part of which has a channel for installing a fixed plug (2), and the positioning plug (13) is tightly connected to the flexible body (1) to form a whole; the hardness of the positioning plug is greater than that of the flexible body (1).

2. The dumbbell plate according to claim 1, characterized in that: The flexible body (1) is integrally formed with a skirt (12), which covers the outer side of the positioning plug (13). The skirt (12) has an opening or a gap (121), and the filler (19) and gas can pass through the positioning plug (13) and the skirt (12) to enter the inner cavity of the flexible body (1).

3. The dumbbell plate according to claim 1 or 2, characterized in that: The fixed plug (2) is a flexible member, and a ring-shaped convex edge (21) is arranged on the side of the fixed plug (2). The fixed plug (2) enters the perfusion channel (14) and is in a sealed state, and the ring-shaped convex edge (21) is deformed and tightly fitted on the inner wall of the perfusion channel (14).

4. The dumbbell plate according to claim 3, characterized in that: A blind hole (22) is provided inside the fixed plug (2), which provides space for the fixed plug to deform inwardly. The annular convex edge deforms and forces the inner diameter of the blind hole to decrease or partially close. The diameter of the annular convex edge is larger than the perfusion channel. When the fixed plug is pushed into the perfusion channel, the annular convex edge tilts along the entry direction.

5. The dumbbell plate according to claim 1, 2 or 4, characterized in that: The flexible body is annular in shape when inflated, and its outer surface is a continuous arc in the inflated state.

6. A dumbbell, characterized in that: The dumbbell plate comprises any one of claims 1, 2 or 4, and also comprises a dumbbell rod (3), wherein both ends of the dumbbell rod (3) are provided with threaded sections (32), each threaded section (32) can hold at least two dumbbell plates, an internal thread matching the threaded section is provided in the middle of a stopper (4), and the stopper (4) can be threadedly connected to the threaded section; a stopper (31) is provided on the side of the threaded section of the dumbbell rod, and the dumbbell plate abuts between the stopper (31) and the stopper (4).

7. The dumbbell according to claim 6, characterized in that: In the inflated state, the inner diameter of the middle through hole of the dumbbell piece is larger than the maximum outer diameter of the threaded section; when the stopper (4) is tightened, the dumbbell piece is deformed laterally, the inner diameter of the middle through hole of the dumbbell piece is reduced, and the dumbbell piece abuts against the outer surface of the threaded section.

8. A method for processing a dumbbell plate, characterized in that: The dumbbell plate processing steps described in any one of claims 1, 2, 4 or 7 are as follows: the first step is to provide a core in the middle of the vinyl mold, to sleeve a positioning plug on the core, to place a thermoplastic material in the vinyl mold and perform hot-melt shaping together with the core to form a flexible body; The second step is to take out the shaped flexible body, the temperature of which is greater than 50 degrees Celsius, and quickly insert the shaped plug into the positioning plug after the flexible body is taken out from the enamel mold; In the third step, after the flexible body is cooled, the shaping plug is pried out, and the filling material is poured into the flexible body through the channel of the positioning plug by the pouring machine; The fourth step is to inflate the positioning plug until the flexible body bulges; then push the fixed plug into the positioning plug; the fixed plug and the shaping plug have the same shape and material.

9. The method for processing dumbbell pieces according to claim 8, characterized in that: A through hole is arranged in the middle of the shaped plug.

10. The method for processing dumbbell pieces according to claim 8, characterized in that: Before injecting the filler, the injection channel is punctured with an injection needle to ensure that the injection channel is unobstructed.

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