CN213313137U - Dumbbell with adjustable weight - Google Patents

Abstract

The utility model belongs to the technical field of body-building apparatus technique and specifically relates to a dumbbell with adjustable weight is related to. The utility model provides a dumbbell with adjustable weight, includes base subassembly, two counter weight components and adjusting part, the base subassembly include the bracing piece, the both sides of bracing piece all the interval be provided with inner support and outer support, inner support and outer support between place a counter weight component respectively, counter weight component include a plurality of counter weight pieces that have the accent heavy hole, adjusting part include the outer tube, the outer tube in be provided with and be responsible for, be responsible for in correspond and be provided with upper adjusting rod and lower adjusting rod, upper adjusting rod and lower adjusting rod between be provided with the regulation passageway, one side that is close to the regulation passageway of upper adjusting rod and lower adjusting rod all be provided with the rack, be provided with the gear between two racks, upper adjusting rod on be connected with the slide that is used for driving the upper adjusting rod and removes. The utility model discloses can adjust weight conveniently, the operation is very simple.

Description

Dumbbell with adjustable weight

Technical Field

The utility model belongs to the technical field of body-building apparatus technique and specifically relates to a dumbbell with adjustable weight is related to.

Background

A dumbbell (dumbbell) is an auxiliary device for weight lifting and body building exercises and is used for strengthening muscle strength training. The dumbbell is named because no sound is produced during practice.

The dumbbell on the existing market can be divided into weight fixing and weight adjusting, wherein the dumbbell piece is installed on the dumbbell rod according to the weight requirement in a conventional adjusting mode of the dumbbell with the weight adjusting, the dumbbell piece is locked by the aid of the compression nut, the dumbbell piece is required to be manually and continuously disassembled and assembled in the adjusting mode, and operation is complex.

For example, Chinese patent publication numbers are: CN104415500A, an adjustable dumbbell announced in 3/18/2015, which comprises a dumbbell head and a dumbbell rod, wherein two ends of the dumbbell rod are of a threaded structure, a rectangular compression nut is arranged on the dumbbell rod outside the dumbbell head, threaded holes are formed in the compression nut and the dumbbell head at the same axial height, and screws penetrate through the threaded holes. Although the dumbbell has the advantages that the compression nut and the dumbbell head are connected into a whole through the screw, the dumbbell head is prevented from loosening, so that a user can use the dumbbell more conveniently, the dumbbell is simple in structure and easy to manufacture, the dumbbell can be adjusted by manually and continuously disassembling the dumbbell pieces, and the dumbbell is complex to operate.

Disclosure of Invention

The utility model discloses mainly be to the dumbbell that current weight is adjustable need artificial continuous dismouting dumbbell piece to realize, operate comparatively loaded down with trivial details problem, provide one kind can adjust weight conveniently, operate dumbbell with adjustable weight very simple.

The purpose of the utility model is mainly realized by the following scheme: the utility model provides a dumbbell with adjustable weight, includes base subassembly, two counter weight components and adjusting part, the base subassembly include the bracing piece, the both sides of bracing piece all the interval be provided with inner support and outer support, inner support and outer support between place a counter weight component respectively, counter weight component include a plurality of counter weight pieces that have the accent heavy hole, adjusting part include the outer tube, the outer tube in be provided with and be responsible for, be responsible for in correspond and be provided with accent heavy hole complex upper adjusting rod and lower adjusting rod, upper adjusting rod and lower adjusting rod between be provided with the regulation passageway, upper adjusting rod and lower adjusting rod's one side that is close to the regulation passageway all be provided with the rack, be provided with the gear between two racks, upper adjusting rod on be connected with the slide that is used for driving upper adjusting rod and removes. The base component comprises supporting rods, an inner support and an outer support are arranged on two sides of each supporting rod at intervals, a counterweight component is arranged between the inner support and the outer support respectively, the number of the supporting rods is two, a placing position is formed between the inner support and the outer support, the counterweight component is placed in the placing position and comprises a plurality of counterweight sheets with weight adjusting holes, the adjusting component comprises an outer tube, a main tube is arranged in the outer tube, an upper adjusting rod and a lower adjusting rod which are matched with the weight adjusting holes are correspondingly arranged in the main tube, an adjusting channel is arranged between the upper adjusting rod and the lower adjusting rod, racks are arranged on one sides of the upper adjusting rod and the lower adjusting rod, a gear is arranged between the two racks, a sliding plate for driving the upper adjusting rod to move is connected on the upper adjusting rod, and particularly when the base component is used, the adjusting component is firstly placed between the two inner supports of the, then the user can drive the direction of adjusting the pole toward one side through removing the slide and remove, can drive the pole and remove simultaneously on the slide when removing, thereby drive gear revolve through the rack on the pole of adjusting, can drive down the direction of adjusting the pole toward the opposite side through the rack on the lower adjusting pole during gear revolve, make promptly to adjust the pole and can remove simultaneously toward opposite direction with lower adjusting pole, it can get into in the accent heavy hole on the counter weight piece when removing to go up adjusting pole and lower adjusting pole, thereby the user can select the counter weight piece of suitable quantity through moving up adjusting pole and lower adjusting pole to suitable position, the operation is very simple, can adjust the dumbbell to the weight of needs conveniently.

Preferably, the sliding plate is positioned between the outer pipe and the main pipe, the sliding plate is provided with a sliding button, the outer pipe is provided with an outer sliding chute matched with the sliding plate, and the main pipe is provided with an inner sliding chute matched with the sliding plate. The slide is located the outer tube and is responsible for between, is provided with the slide button on the slide, be provided with on the outer tube with slide matched with outer spout, be responsible for be provided with slide matched with inner spout, slide and outer tube and be responsible for equal sliding connection, when the user promoted the slide button and removes, can drive the slide and remove simultaneously, convenient to use is convenient for adjust the weight of dumbbell.

Preferably, the gear is provided with a positioning shaft which is connected with the side wall of the adjusting channel in a sliding way and penetrates through the main pipe. Be provided with on the gear with the lateral wall sliding connection of regulation passageway and run through to the location axle on being responsible for, the setting of location axle can improve the stability of gear when the atress rotates, can prevent gear skew position to can make and go up the regulation pole and can move simultaneously with lower regulation pole steadily.

Preferably, both ends of the outer tube are provided with protecting covers.

Preferably, the protecting cover is connected with a main balancing weight, the main balancing weight and the balancing weight are respectively provided with a connecting frame, one side of the connecting frame is provided with an embedded groove, and the other side of the connecting frame is provided with an embedded bulge matched with the embedded groove. Be connected with main balancing weight on the protecting cover, the fix with screw is covered on the protecting cover for the main balancing weight, all be provided with the link on main balancing weight and the counter weight piece, one side of link is provided with the embedded groove, the opposite side of link is provided with embedded groove matched with embedding arch, when main balancing weight is placed on base subassembly, embedding arch on the main balancing weight can block in the embedded groove on the adjacent counter weight piece, can realize the axial positioning of counter weight piece, thereby make when last regulation pole and lower regulation pole support the back with corresponding counter weight piece, can make the counter weight piece can not the shift position, security and stability are all very good.

Preferably, the cross sections of the embedded groove and the embedded protrusion are both trapezoidal. The embedded groove all is trapezoidal with the bellied cross section of embedding to make the protruding card of embedding go into behind the embedded groove, can prevent that the counter weight piece that is connected from taking place axial displacement.

Preferably, the upper adjusting rod and the lower adjusting rod are respectively provided with a plurality of positioning grooves at one side far away from each other, positioning springs are respectively arranged in the two protecting covers corresponding to the positioning grooves, and positioning balls matched with the positioning grooves are arranged at one ends, close to the positioning grooves, of the positioning springs. Go up the one side of keeping away from mutually of adjusting the pole and adjusting the pole down and all be provided with a plurality of constant head tanks, it all is provided with positioning spring to correspond the constant head tank in two protecting covers, positioning spring's the one end that is close to the constant head tank is provided with the location pearl with constant head tank matched with, the gear stops is realized through positioning spring with the mode of location pearl, the location pearl can be on the restriction in certain dynamics adjust the removal of pole and adjusting the pole down, the user's perception of being convenient for, each gear corresponds the counter weight piece of different quantity, thereby convenience of customers adjusts the dumbbell to required weight.

Preferably, the two ends of the outer tube are provided with locking assemblies located in the protecting cover, each locking assembly comprises an unlocking block, one side, close to the adjusting channel, of each of the upper adjusting rod and the lower adjusting rod is provided with a plurality of clamping grooves, the two ends of the adjusting channel respectively correspond to the upper adjusting rod and the lower adjusting rod and are respectively provided with a locking key, each locking key is provided with a clamping block matched with the clamping groove, one side, far away from the clamping block, of each locking key is provided with a return pin, one side, close to the return pin, of the protecting cover is provided with a locking seat corresponding to the locking key, each locking seat is provided with a locking spring used for clamping the clamping block into the corresponding clamping groove around the locking key and corresponding to the return pin, one end, far away from the return pin, of the locking key is provided with an unlocking pin, the unlocking block is provided with an unlocking inclined plane matched with the unlocking pin, and the inner support is provided with an unlocking boss, the unlocking block is provided with an unlocking bulge matched with the unlocking boss. The two ends of the outer tube are respectively provided with a locking component positioned in the protecting cover, the locking components respectively comprise an unlocking block, one side of the upper adjusting rod and one side of the lower adjusting rod close to the adjusting channel are respectively provided with a plurality of clamping grooves, the clamping grooves correspond to the gear positions represented by the positioning grooves, the two ends of the adjusting channel respectively correspond to the upper adjusting rod and the lower adjusting rod and are respectively provided with a lock key, the lock key is provided with a clamping block matched with the clamping grooves, one side of the lock key far away from the clamping block is provided with a return pin, one side of the protecting cover close to the return pin is provided with a locking seat corresponding to the lock key, the locking seat surrounds the lock key and is provided with a locking spring used for clamping the clamping block into the corresponding clamping groove corresponding to the return pin, one end of the lock key far away from the return pin is provided with an unlocking pin, the unlocking block is provided with an unlocking inclined plane matched with the unlocking pin, the inner, when the adjusting assembly is placed on the base assembly, the unlocking boss on the inner support can abut against the unlocking protrusion of the unlocking block, so that the unlocking block moves, the unlocking inclined plane can abut against the unlocking pin when the unlocking block moves, the unlocking pin and the key are driven to move after overcoming the spring force of the locking spring, the clamping block is separated from the clamping groove, the unlocking function is realized, and the upper adjusting rod and the lower adjusting rod can move under the action of the sliding plate; when the adjusting component is taken up, the unlocking boss is not abutted to the unlocking protrusion, so that the locking spring enables the lock key to reset under the action of the return pin, the lock key drives the clamping block to move and is clamped into the corresponding clamping groove, the locking function is realized, the upper adjusting rod and the lower adjusting rod can be prevented from moving, and a better safety effect can be achieved.

Preferably, the protecting cover is internally provided with a return block corresponding to the unlocking block, and a return spring is connected between the return block and the unlocking block. The corresponding unlocking block in the protecting cover is provided with a return block, a return spring is connected between the return block and the unlocking block, the return block and the return spring are arranged to enable the unlocking block to be reset through the return spring to the acting force of the unlocking block when the unlocking boss is not abutted to the unlocking protrusion, and therefore the locking function of the key is achieved.

Preferably, the clamping block is provided with a clamping groove, the two sides of the clamping groove are both connected with arc-shaped clamping plates in a sliding mode, and a clamping spring is connected between the two arc-shaped clamping plates. Be provided with the chucking groove on the fixture block, the equal sliding connection in both sides in chucking groove has the arc cardboard, be connected with clamping spring between two arc cardboards, when the fixture block removes and gets into in the draw-in groove, the arc cardboard of both sides can support under clamping spring's effect on the both sides of draw-in groove, thereby make and go up the regulation pole and can realize stable location with lower regulation pole, prevent to remove, improve the security of user when using the dumbbell, and the setting of arc cardboard is convenient for in the fixture block card income draw-in groove, the dead condition of card can not appear.

Preferably, the outer tube is provided with metering characters corresponding to the slide buttons for displaying weight information. The corresponding slide button on the outer tube is provided with the measurement characters that are used for showing weight information, and the user of being convenient for observes to convenience of customers adjusts the dumbbell to suitable weight.

Therefore, the utility model discloses a dumbbell with adjustable weight possesses following advantage: the utility model discloses the operation is very simple, can adjust weight conveniently, and the user can drive through removing smooth button and go up the regulation pole and stretch out or retract with lower regulation pole simultaneously to adjust the dumbbell to required weight, locking Assembly's setting can make the stability and the security of dumbbell when being used high.

Drawings

Fig. 1 is a schematic structural diagram of the present invention.

Fig. 2 is a schematic structural view of the mid-sole assembly of the present invention.

Fig. 3 is a schematic structural diagram of the middle weight component of the present invention.

Fig. 4 is a schematic structural diagram of the adjusting assembly of the present invention.

Fig. 5 is a schematic view of the internal structure of the protecting cover of the present invention.

Fig. 6 is a schematic structural diagram of the middle main tube of the present invention.

Fig. 7 is a schematic view of the structure of fig. 6 with the slide plate and slide button removed.

Fig. 8 is a schematic view of the structure of fig. 7 with the main tube removed.

Fig. 9 is a cross-sectional view of the present invention.

Fig. 10 is a schematic structural diagram of a key of the present invention.

Fig. 11 is a cross-sectional view of a middle clip of the present invention.

Illustration of the drawings: 1-base component, 11-support rod, 12-inner support, 13-outer support, 14-unlocking boss, 2-counterweight component, 21-counterweight piece, 22-weight adjusting hole, 23-connecting frame, 24-embedding bulge, 25-embedding groove, 3-adjusting component, 31-outer tube, 32-metering character, 33-protective cover, 34-main counterweight block, 351-outer chute, 352-sliding plate, 353-sliding button, 354-inner chute, 36-main tube, 41-unlocking block, 411-unlocking bulge, 42-return block, 43-return spring, 44-unlocking slope, 45-unlocking pin, 46-locking key, 47-locking spring, 481-return pin, 482-limiting groove, 49-locking seat, 51-upper adjusting rod, 52-lower adjusting rod, 53-adjusting channel, 541-gear, 542-positioning shaft, 55-positioning groove, 56-positioning spring, 57-positioning ball, 58-clamping groove, 59-rack, 60-clamping block, 61-clamping groove, 62-arc-shaped clamping plate and 63-clamping spring.

Detailed Description

The technical solution of the present invention is further specifically described below by way of examples and with reference to the accompanying drawings.

Example 1:

as shown in fig. 1, 2, 3, 4, 5, 8 and 9, a weight-adjustable dumbbell includes a base assembly 1, two weight assemblies 2 and an adjusting assembly 3, the base assembly 1 includes a support rod 11, an inner support 12 and an outer support 13 are disposed at both sides of the support rod 11 at intervals, one weight assembly 2 is disposed between the inner support 12 and the outer support 13, the number of the support rods 11 is two, a placement position is formed between the inner support 12, the outer support 13 and the support rod 11, the weight assemblies 2 are placed in the placement position, the weight assemblies 2 include a plurality of weight plates 21 having weight adjusting holes 22, the adjusting assembly 3 includes an outer tube 31, a main tube 36 is disposed in the outer tube 31, an upper adjusting rod 51 and a lower adjusting rod 52 which are matched with the weight adjusting holes 22 are correspondingly disposed in the main tube 36, an adjusting channel 53 is disposed between the upper adjusting rod 51 and the lower adjusting rod 52, racks 59 are disposed on both sides of the upper adjusting rod 51 and the lower adjusting rod 52 close to the adjusting channel 53, a gear 541 is arranged between the two racks 59, a sliding plate 352 for driving the upper adjusting rod to move is connected to the upper adjusting rod 51, specifically, when in use, the adjusting assembly 3 is firstly placed between the two inner brackets 12 of the base assembly 1, then, a user can drive the upper adjusting rod 51 to move towards one side direction by moving the sliding plate 352, the sliding plate 352 can drive the upper adjusting rod 51 to move simultaneously when moving, so that the gear 541 is driven to rotate by the rack 59 on the upper adjusting rod, the gear 541 can drive the lower adjusting rod 52 to move towards the other side direction by the rack 59 on the lower adjusting rod 52 when rotating, i.e. the upper adjusting rod 51 and the lower adjusting rod 52 can move simultaneously in opposite directions, the upper adjusting rod 51 and the lower adjusting rod 52 can enter the weight holes 22 on the weight plates 21 when moving, and the user can select a proper number of weight plates 21 by moving the upper adjusting rod 51 and the lower adjusting rod 52 to proper positions, the operation is very simple, can adjust the dumbbell to the weight that needs conveniently.

As shown in fig. 6 and 7, the sliding plate 352 is located between the outer tube 31 and the main tube 36, the sliding plate 352 is provided with a sliding button 353, the outer tube 31 is provided with an outer sliding groove 351 matched with the sliding plate 352, the main tube 36 is provided with an inner sliding groove 354 matched with the sliding plate 352, the outer tube 31 and the main tube 36 are connected in a sliding manner, and when a user pushes the sliding button 353 to move, the sliding plate 352 can be driven to move simultaneously, so that the dumbbell is convenient to use and adjust the weight of the dumbbell.

The gear 541 is provided with a positioning shaft 542 which is slidably connected with the side wall of the adjusting channel 53 and penetrates the main pipe 36, and the positioning shaft 542 can improve the stability of the gear 541 when the gear 541 is forced to rotate, prevent the gear 541 from deviating, and enable the upper adjusting rod 51 and the lower adjusting rod 52 to stably and simultaneously move.

The two ends of the outer tube 31 are respectively provided with a protecting cover 33, the protecting covers 33 are connected with a main balancing weight 34, the main balancing weight 34 is fixed on the protecting covers 33 through screws, the main balancing weight 34 and the counterweight sheets 21 are respectively provided with a connecting frame 23, one side of the connecting frame 23 is provided with an embedded groove 25, the other side of the connecting frame 23 is provided with an embedded bulge 24 matched with the embedded groove 25, when the main balancing weight 34 is placed on the base assembly 1, the embedded bulge 24 on the main balancing weight 34 can be clamped into the embedded groove 25 on the adjacent counterweight sheet 21, the axial positioning of the counterweight sheet 21 can be realized, so that the counterweight sheet 21 can not move after the corresponding counterweight sheet 21 is supported by the upper adjusting rod 51 and the lower adjusting rod 52, and the safety and the stability are very good; the cross sections of the embedded groove 25 and the embedded protrusion 24 are trapezoidal, so that after the embedded protrusion 24 is clamped into the embedded groove 25, the connected weight plates 21 can be prevented from moving axially.

Go up one side of keeping away from mutually of adjusting pole 51 and lower adjusting pole 52 and all be provided with a plurality of constant head tanks 55, it all is provided with positioning spring 56 to correspond constant head tank 55 in two protecting covers 33, positioning spring 56's one end that is close to constant head tank 55 is provided with and positioning ball 57 with constant head tank 55 matched with, the gear stop is realized to the mode that adds positioning ball 57 through positioning spring 56, positioning ball 57 can be on the restriction at a certain dynamics adjust pole 51 and 52 removal down with adjusting pole, be convenient for user perception, each gear corresponds the counter weight piece 21 of different quantity, thereby convenience of customers adjusts the dumbbell to required weight.

As shown in fig. 10, both ends of the outer tube 31 are provided with locking assemblies located in the protecting cover 33, each locking assembly includes an unlocking block 41, one side of each of the upper adjusting rod 51 and the lower adjusting rod 52 close to the adjusting channel 53 is provided with a plurality of slots 58, each slot 58 corresponds to a gear position represented by the positioning slot 55, both ends of the adjusting channel 53 are respectively provided with a key 46 corresponding to each of the upper adjusting rod 51 and the lower adjusting rod 52, the key 46 is provided with a fixture block 60 matched with the slot 58, one side of the key 46 away from the fixture block 60 is provided with a return pin 481, one side of the protecting cover 33 close to the return pin 481 is provided with a locking seat 49 corresponding to the key 46, the locking seat 49 is provided with a locking spring 47 surrounding the key 46 and corresponding to the return pin 481 for clamping the fixture block 60 into the corresponding slot 58, one end of the key 46 away from the return pin 481 is provided with an unlocking pin 45, the unlocking block 41 is provided with an unlocking pin 44 matched with the unlocking pin 45, the inner support 12 is provided with an unlocking boss 14, the unlocking block 41 is provided with an unlocking protrusion 411 matched with the unlocking boss 14, when the adjusting assembly 3 is placed on the base assembly 1, the unlocking boss 14 on the inner support 12 can abut against the unlocking protrusion 411 of the unlocking block 41, so that the unlocking block 41 moves, the unlocking inclined plane 44 of the unlocking block 41 can abut against the unlocking pin 45 when the unlocking block 41 moves, the unlocking pin 45 and the locking key 46 are driven to move after overcoming the spring force of the locking spring 47, the clamping block 60 is separated from the clamping groove 58, the unlocking function is realized, and at the moment, the upper adjusting rod 51 and the lower adjusting rod 52 can move under the action of the sliding plate 352; when the adjusting assembly 3 is taken up, the unlocking boss 14 does not abut against the unlocking protrusion 411, so that the locking spring 47 exerts force on the return pin 481 to reset the key 46, and the key 46 drives the fixture block 60 to move and clamp into the corresponding clamping groove 58, thereby realizing a locking function, preventing the upper adjusting rod 51 and the lower adjusting rod 52 from moving, and playing a better safety role; the corresponding return pin 481 in the protecting cover 33 is provided with a limiting groove 482, and the maximum moving distance of the return pin 481 is limited by the limiting groove 482, so that the stability of the locking assembly is good when the locking assembly works.

The protective cover 33 is internally provided with a return block 42 corresponding to the unlocking block 41, a return spring 43 is connected between the return block 42 and the unlocking block 41, and when the unlocking boss 14 is not abutted to the unlocking protrusion 411, the return block 42 and the return spring are arranged, so that the unlocking block 41 is convenient to return through the acting force of the return spring 43 on the unlocking block 41, and the locking function of the key 46 is convenient to realize.

As shown in fig. 11, be provided with chucking groove 61 on the fixture block 60, the equal sliding connection in both sides of chucking groove 61 has arc cardboard 62, be connected with clamping spring 63 between two arc cardboard 62, when fixture block 60 removed and gets into in the draw-in groove 58, the arc cardboard 62 of both sides can support under clamping spring 63's effect on the both sides of draw-in groove 58, thereby make upper adjusting rod 51 and lower adjusting rod 52 can realize stable location, prevent to remove, improve the security of user when using the dumbbell, and arc cardboard 62's setting is convenient for fixture block 60 card income draw-in groove 58, the dead condition of card can not appear.

The outer tube 31 is provided with a metering character 32 for displaying weight information corresponding to the slide button 353, so that the user can observe the metering character conveniently, and the user can adjust the dumbbell to a proper weight conveniently.

The use method of the weight-adjustable dumbbell comprises the following steps:

firstly, respectively placing two counterweight components 2 between an inner support 12 and an outer support 13 of a base component 1;

step two, the adjusting component 3 is placed between the two inner brackets 12 of the base component 1;

step three, the unlocking boss 14 abuts against the unlocking protrusion 411, so that the unlocking block 41 drives the unlocking pin 45 to move, the fixture block 60 is separated from the clamping groove 58, the unlocking function is realized, and at the moment, the user can move the sliding button 353, so that the upper adjusting rod 51 and the lower adjusting rod 52 are moved to appropriate positions simultaneously;

and step four, lifting the adjusting assembly 3, driving the corresponding weight plate 21 to move by the upper adjusting rod 51 and the lower adjusting rod 52, and enabling the unlocking boss 14 not to abut against the unlocking protrusion 411 at the moment, so that the locking spring 47 applies force to the return pin 481 to reset the key 46, and the key 46 drives the fixture block 60 to move and clamp into the corresponding clamping groove 58, thereby realizing a locking function, preventing the upper adjusting rod 51 and the lower adjusting rod 52 from moving, and enabling a user to exercise later.

It should be understood that this example is for illustrative purposes only and is not intended to limit the scope of the present invention. Furthermore, it should be understood that various changes and modifications of the present invention may be made by those skilled in the art after reading the teachings of the present invention, and these equivalents also fall within the scope of the appended claims.

Claims (10)

1. A dumbbell with adjustable weight is characterized by comprising a base component, two counterweight components and an adjusting component, the base component comprises a supporting rod, an inner support and an outer support are arranged at both sides of the supporting rod at intervals, a counterweight component is respectively arranged between the inner bracket and the outer bracket, the counterweight component comprises a plurality of counterweight sheets with counterweight holes, the adjusting component comprises an outer pipe, a main pipe is arranged in the outer pipe, an upper adjusting rod and a lower adjusting rod which are matched with the weight adjusting holes are correspondingly arranged in the main pipe, an adjusting channel is arranged between the upper adjusting rod and the lower adjusting rod, racks are arranged on one sides, close to the adjusting channel, of the upper adjusting rod and the lower adjusting rod, a gear is arranged between the two racks, and a sliding plate used for driving the upper adjusting rod to move is connected to the upper adjusting rod.

2. The weight-adjustable dumbbell of claim 1, wherein the sliding plate is located between the outer tube and the main tube, the sliding plate is provided with a sliding button, the outer tube is provided with an outer sliding groove matched with the sliding plate, and the main tube is provided with an inner sliding groove matched with the sliding plate.

3. The weight-adjustable dumbbell of claim 1, wherein the gear is provided with a positioning shaft slidably connected with the side wall of the adjusting channel and penetrating the main tube.

4. A weight adjustable dumbbell according to claim 1, 2 or 3, wherein both ends of the outer tube are provided with protective covers.

5. The dumbbell with the adjustable weight of claim 4, wherein the protecting cover is connected with a main balancing weight, the main balancing weight and the balancing weight are both provided with a connecting frame, one side of the connecting frame is provided with an embedded groove, and the other side of the connecting frame is provided with an embedded protrusion matched with the embedded groove.

6. The weight-adjustable dumbbell of claim 5, wherein the cross-sections of the insertion grooves and the insertion protrusions are trapezoidal.

7. The dumbbell of claim 4, wherein the upper and lower adjusting rods are provided with a plurality of positioning grooves on the sides thereof facing away from each other, positioning springs are provided in the two protecting covers corresponding to the positioning grooves, and a positioning ball is provided at the end of each positioning spring adjacent to the positioning groove to engage with the positioning groove.

8. The dumbbell with the adjustable weight according to claim 7, characterized in that both ends of the outer tube are provided with locking assemblies located in a protecting cover, each locking assembly comprises an unlocking block, one side of each of the upper adjusting rod and the lower adjusting rod, which is close to the adjusting channel, is provided with a plurality of clamping grooves, both ends of the adjusting channel are respectively provided with a locking key corresponding to the upper adjusting rod and the lower adjusting rod, the locking key is provided with a clamping block matched with the clamping groove, one side of the locking key, which is far away from the clamping block, is provided with a return pin, one side of the protecting cover, which is close to the return pin, is provided with a locking seat corresponding to the locking key, the locking seat is provided with a locking spring around the locking key and corresponding to the return pin for clamping the clamping block into the corresponding clamping groove, one end of the locking key, which is far away from the return pin, is provided with an unlocking slope matched with the unlocking pin, the inner support is provided with an unlocking boss, and the unlocking block is provided with an unlocking protrusion matched with the unlocking boss.

9. The dumbbell of claim 8, wherein a return block is provided in the cover corresponding to the unlocking block, and a return spring is connected between the return block and the unlocking block.

10. The dumbbell of claim 2, wherein the corresponding slide button on the outer tube is provided with a gauge text for displaying weight information.

Images