CN108969974B

CN108969974B - Safety dumbbell set

Info

Publication number: CN108969974B
Application number: CN201710413908.9A
Authority: CN
Inventors: 王罗平
Original assignee: SHUANGYU INDUSTRIAL Co Ltd
Current assignee: SHUANGYU INDUSTRIAL Co Ltd
Priority date: 2017-06-05
Filing date: 2017-06-05
Publication date: 2020-03-27
Anticipated expiration: 2037-06-05
Also published as: CN108969974A

Abstract

The invention discloses a safe dumbbell group, which comprises a containing seat, a dumbbell handle and a counterweight unit, wherein the containing seat is provided with a seat body and a containing area, the containing area is provided with a containing groove, a first fixing part is arranged in the containing groove, the dumbbell handle is provided with a handle and a selection unit, the selection unit is provided with a selection disc, the selection disc is provided with a pressing unit and a release gap, the counterweight unit is provided with a counterweight block, the counterweight block is provided with clamping blocks, a third spring and a connecting rod, a clamping groove is formed between the clamping blocks, a second fixing part is arranged on the outer peripheral surface of the clamping block, when the connecting rod corresponds to the position of the pressing unit, the connecting rod pivots from an inner contraction position to an outer support position, the clamping blocks are clamped to the inner clamping position, the clamping groove is clamped on the handle, the first fixing part is separated from the second fixing part, the counterweight block is clamped on the handle, when the connecting rod corresponds to the position of the release gap, the connecting rod is, the first fixing part is clamped with the second fixing part to separate the balancing weight from the handle and keep the balancing weight on the containing seat, so as to improve the safety.

Description

Safety dumbbell set

Technical Field

The present invention relates to the field of dumbbell technology, and more particularly to a safety dumbbell set.

Background

The dumbbell is a common and simple fitness apparatus, and is mainly used for being gripped and lifted by the hands of a user to strengthen the muscle strength of the arms and peripheral muscles.

Early dumbbells were integrally formed, so the weights could not be changed, and users had to buy many dumbbells with different weights when they wanted to use dumbbells with different weights, which resulted in problems of too many dumbbells to be easily stored and too high money cost.

Therefore, there is a dumbbell set with adjustable weight, which mainly comprises a dumbbell handle, two weight units and a receptacle, wherein each of the two weight units has a plurality of weight blocks, and the weight blocks can be selectively placed on the receptacle or assembled on the dumbbell handle, thereby achieving the purpose of adjusting the weight. However, the fixing structure between the weight block and the dumbbell handle of the dumbbell group is too weak, so that the weight block is easy to loosen with the dumbbell handle when the user lifts and shakes, and further safety concerns exist. Moreover, the weight block placed on the receiving seat is not fixed with the receiving seat, so that the weight block is easily misplaced by a user, and the problem of incorrect weight selection is caused.

Disclosure of Invention

The invention aims to provide a safety dumbbell group with improved safety.

Based on the above, the present invention mainly adopts the following technical means to achieve the above object.

A dumbbell set is composed of a base with multiple parallel slots and the first fixing part in each slot, a dumbbell handle with a handle and two selection units at both ends of handle, multiple selection plates with a pressing unit with at least one pressing block and at least one releasing gap on one side of selection plate, two counterweight units with multiple counterweight blocks with two clamping blocks, a third spring and a connecting rod, two clamping blocks pivoted to each other and able to be clamped and unfolded reciprocally from an internal clamping position to an external expanding position by external force, a slot between two clamping blocks, and a second fixing part on the external surface of two clamping blocks, the third spring is abutted between the two clamping blocks to provide prestress for the two clamping blocks to expand to the outward-expanding position, the connecting rod is pivoted between the two clamping blocks, the middle section of the connecting rod is provided with a pivot point and can be acted by external force to pivot between a retracted position and an outward-expanding position, when the connecting rod of the balancing weight corresponds to the pressing unit position of the dumbbell handle, the pressing unit is abutted to pivot the connecting rod from the retracted position to the outward-expanding position so as to clamp the two clamping blocks to the inward-clamping position, the clamping groove clamps the handle, the first fixing part of the containing seat is separated from the second fixing part of the balancing weight so as to separate the balancing weight from the containing seat and clamp the handle of the dumbbell handle, when the connecting rod of the balancing weight corresponds to the releasing gap position of the dumbbell handle, the pressing unit does not contact with the connecting rod, so that the connecting rod is positioned at the retracted position, and the third spring expands the two clamping blocks to the outward-expanding position, the clamping groove is separated from the grab handle, the first fixing part of the containing seat is clamped with the second fixing part of the balancing weight, and the balancing weight is separated from the grab handle and is kept on the containing seat.

The storage seat is further provided with two support columns which are protruded on the top surface of the seat body, the selection unit of the dumbbell handle is further provided with a brake cover, a rotary table and a positioning group, the brake cover is provided with a protective cover, a brake block and a first spring, the protective cover is sleeved on the grab handle and can rotate relative to the grab handle, the protective cover is provided with a view window, a sliding chute which is positioned on the opposite side of the view window and an acting hole which is communicated with the sliding chute and has the width smaller than the width of the groove of the sliding chute, the brake block is arranged in the sliding chute and can be acted by external force to carry out linear reciprocating sliding between a release position and a brake position, the first spring is abutted between the brake block and the groove wall of the sliding chute so as to provide elastic prestress for the brake block to move to the brake position, the rotary table is fixedly connected on the grab handle and positioned in the protective cover of the brake cover, a plurality of brake grooves and a plurality of weight values are arranged on the circumferential surface of the rotary table at equal angles, the positioning set is arranged between the brake cover and the rotary table to provide a proper rotary resistance between the rotary table and the brake cover, when the dumbbell handle is placed on the top surface of the containing seat, the top column on the containing seat can penetrate through the acting hole, the top column pushes the brake block to move from a braking position to a release position, so that the brake block is released out of the brake groove, and the grab handle, the rotary table and the selection disc can rotate relative to the brake cover.

Furthermore, the positioning set has a plurality of positioning holes disposed on the turntable at equal angles, a positioning groove disposed on the protecting cover of the braking cover, a second spring disposed in the positioning groove, and a bead body pushed by the second spring toward the turntable.

The selection unit further comprises a limiting piece, the limiting piece is fixedly connected to the protecting cover of the brake cover and provided with a plurality of first clamping parts, a limiting groove communicated with the clamping groove is formed between the inner sides of the two clamping blocks of the balancing weight, a second clamping part is arranged on the groove wall of the limiting groove, when the two clamping blocks are located at the inner clamping position, the second clamping part of the balancing weight is clamped with the first clamping part of the limiting piece, and when the two clamping blocks are located at the outer expanding position, the second clamping part of the balancing weight is separated from the first clamping part of the limiting piece.

Furthermore, the first clamping parts are clamping blocks symmetrically positioned on two outer side surfaces of the limiting part, and the second clamping parts are clamping grooves respectively positioned on inner wall surfaces of two sides of the limiting groove.

Furthermore, the dumbbell handle is also provided with an elastic sleeve which is sleeved on the middle section of the grab handle.

Furthermore, the balancing weight is also provided with a bolt which is inserted on the adjacent inner sides of the two clamping blocks so that the two clamping blocks are mutually pivoted.

Furthermore, the connecting rod of the balancing weight is provided with two cranks, a disc, an inner end bolt and an outer end bolt, the inner end bolt is inserted and pivoted in the adjacent inner ends of the disc and the two cranks so that the two cranks can pivot movably, the outer end bolt respectively inserts and pivots the outer end of each crank and each clamping block, and the inner end bolt is used as a pivot point.

Furthermore, the first fixing part of the containing seat is a convex block protruding from the wall surface of the bottom of the containing groove and two fixing grooves positioned on two opposite sides of the convex block, and the second fixing part of the counterweight block of the counterweight unit is a fixing convex block protruding from the inner side end angle of the bottom of each clamping block.

Furthermore, the first fixing part of the containing seat is a convex block which protrudes inwards from the top edges of the two sides of the containing groove, and the second fixing part of the counterweight block of the counterweight unit is a concave groove which is sunk from the outer side edge of each clamping block.

By adopting the technical means, the safe dumbbell group of the invention is characterized in that through the structural design of the containing seat, the dumbbell handle and the counterweight unit, the containing seat is provided with a seat body and two containing areas positioned on the top surface of the seat body, each containing area is provided with a plurality of containing grooves side by side, a first fixing part is arranged in each containing groove, the dumbbell handle is provided with a handle and two selecting units respectively arranged at the two ends of the handle, each selecting unit is provided with a plurality of selecting discs arranged according to a preset interval, one side surface of each selecting disc is provided with a pressing unit and at least one releasing gap, each pressing unit is provided with at least one pressing block, each counterweight unit is provided with a plurality of counterweight blocks, each counterweight block is provided with two clamping blocks, a spring and a connecting rod, the two clamping blocks are mutually pivoted and can be clamped and unfolded back and forth between an inner clamping position and an outer expanding position under the action of external force, a clamping groove is arranged between the two clamping blocks, the outer peripheral surfaces of the two clamping blocks are provided with a second fixing part, the third spring is abutted between the two clamping blocks to provide prestress for the two clamping blocks to expand towards an outward-expanding position, the connecting rod is pivoted between the two clamping blocks, the middle section of the connecting rod is provided with a pivot point and can be pivoted between a retracted position and an outward-supporting position under the action of external force, when the connecting rod of the balancing weight corresponds to the position of the compression unit of the dumbbell handle, the compression unit is abutted to pivot the connecting rod from the retracted position to the outward-supporting position so as to clamp the two clamping blocks to the inward-clamping position, the clamping groove is clamped on the handle, the first fixing part of the containing seat is separated from the second fixing part of the balancing weight, the balancing weight is separated from the containing seat and clamped on the handle of the dumbbell handle, when the connecting rod of the balancing weight corresponds to the position of the release gap of the dumbbell handle, the unit presses the non-contact connecting rod to enable the connecting rod to be positioned at the retracted position, the spring expands the two clamping blocks to the outward expansion position, the clamping groove is separated from the grab handle, the first fixing part of the containing seat is clamped with the second fixing part of the balancing weight, the balancing weight is separated from the grab handle and is kept on the containing seat, and therefore the safety of the dumbbell with the adjustable balancing weight is improved, the safety problem that the balancing weight and a dumbbell handle are easy to loosen and the dumbbell is easy to misplace and place on the containing seat in the prior art is solved.

Drawings

Fig. 1 is an exploded perspective view of a preferred embodiment of the present invention.

Fig. 2 is a perspective assembly view of the embodiment shown in fig. 1.

Fig. 3 is an exploded perspective view of a portion of the components of the embodiment of fig. 1.

Fig. 4 is a perspective assembly view of the partial components of the embodiment of fig. 1.

Fig. 5 is an exploded perspective view of a portion of the components of the embodiment of fig. 1.

Fig. 6 is a perspective assembly view of the partial components of the embodiment of fig. 1.

Fig. 7 to 16 are schematic operation diagrams of the embodiment shown in fig. 1.

Fig. 17 is an exploded perspective view of another embodiment of the present invention.

Fig. 18 and 19 are operation diagrams of the embodiment shown in fig. 17.

[ notation ] to show

Safety dumbbell set 100

Storage seat 10

Top pillar 13 of storage area 12 of seat body 11

First fixing portion 122 of the receiving groove 121

Projection 123 fixing slot 124

Bump 125

Dumbbell handle 20

Selection unit 40 of handle 30

Protecting cover 411 of brake cover 41

Window 414 chute 415

Apply aperture 416 stop block 412

First spring 413 turntable 42

Brake groove 421 weight value 422

Positioning hole 431 of positioning set 43

Positioning groove 432 and second spring 433

Bead 434 selection tray 44

Selection space 441 compression unit 442

Compression block 443 releases void 444

End cap 45 restraint 46

First clamping portion 461 fixture block 462

Elastic sleeve 50

Counterweight unit 60

Clump weight 61 clamping block 62

Clip groove 621 limits groove 622

Second clamping portion 623 and clamping groove 624

Bolt 63 and connecting rod 64

Crank 641 disc 642

Inner end plug 643 and outer end plug 644

Second fixing portion 65 fixing convex portion 651

The recess 652 is a third spring 66.

Detailed Description

To further understand and appreciate the features and characteristics of the present invention, the following embodiments are illustrated in the drawings:

referring to fig. 1 to 16, a safety dumbbell set 100 according to a preferred embodiment of the present invention mainly includes a receptacle 10, a dumbbell handle 20, and two weight units 60, wherein:

referring to fig. 1 and 2, the receiving base 10 has a base 11, two receiving areas 12 and two pillars 13. The base body 11 can be stably placed on a plane (such as the ground or a table top), the two storage areas 12 are located on the top surface of the base body 11 and spaced apart by a predetermined distance, each storage area 12 has a plurality of parallel storage slots 121 and a plurality of first fixing portions 122 respectively disposed on the wall surface of each storage slot 121, and the two top pillars 13 protrude from the top surface of the base body 11 and are respectively located beside each storage area 12.

Referring to fig. 1 to 4, the dumbbell handle 20 has a handle 30, two selection units 40 and an elastic sleeve 50. The two selection units 40 are respectively disposed on two ends of the handle 30, and the elastic sleeve 50 is sleeved on the middle section of the handle 30, since the components of the two selection units 40 and the related connection relationship between the two selection units and the handle 30 are the same, the description of only one selection unit 40 will be omitted for the sake of brevity.

The selector unit 40 has a stopper cover 41, a rotary plate 42, a positioning group 43, a plurality of selector plates 44, an end cover 45, and a restricting member 46. The brake cover 41 has a cover 411, a brake block 412 and a first spring 413, the cover 411 is sleeved on the handle 30 and can rotate relative to the handle 30, the cover 411 has a viewing window 414, a sliding slot 415 located on the opposite side of the viewing window 414 and an acting hole 416 communicating with the sliding slot 415 and having a width smaller than the slot width of the sliding slot 415, the brake block 412 is disposed in the sliding slot 415 and can be acted on a release position to a braking position by an external force to perform a linear reciprocating sliding, the first spring 413 is abutted between the brake block 412 and the slot wall of the sliding slot 415 to provide an elastic pre-force for the brake block 412 to move to the braking position, the turntable 42 is fixedly connected to the handle 30 and located in the cover 411 of the brake cover 41, a plurality of brake slots 421 and a plurality of weight values 422 are provided on the circumferential surface of the turntable 42 at equal angles, the positioning set 43 is disposed between the brake cover 41 and the turntable 42, to provide a proper rotation resistance between the rotary disc 42 and the brake cover 41, the positioning set 43 has a plurality of positioning holes 431 disposed on the rotary disc 42 at equal angles, a positioning slot 432 disposed on the protecting cover 411 of the brake cover 41, a second spring 433 disposed in the positioning slot 432, and a bead 434 pushed by the second spring 433 toward the rotary disc 42, the selection discs 44 are fixed on the handle 30 at equal intervals, so that a selection space 441 is formed at one side of each selection disc 44, each selection disc 44 has a pressing unit 442 on the side surface adjacent to the selection space 441 and at least one releasing gap 444 beside the pressing unit 442, which means that the pressing units 442 on each selection disc 44 are different in shape but have at least one pressing block 443, the end cover 45 is assembled on the outer side surface of the outermost selection disc 44 to seal the end edge of the selection disc 30, the limiting piece 46 is fixed on the protecting cover 411 of the brake cover 41, and is located in the selection space 441, the limiting member 46 has a plurality of first engaging portions 461, and each first engaging portion 461 is a fastening block 462 symmetrically located on two outer side surfaces of the limiting member 46.

Referring to fig. 1 to 6, two weight units 60, each weight unit 60 has a plurality of weights 61, and the number of weights 61 of each weight unit 60 is the same as the number of receiving slots 121 of each receiving area 12 of the receiving seat 10, and also the number of selecting spaces 441 of each selecting unit 40 of the dumbbell handle 20. The counterweight block 61 of each counterweight unit 60 has the same structural configuration, and for avoiding redundant description, only a single counterweight block 61 is described below, where the counterweight block 61 has two clamping blocks 62, a bolt 63, a third spring 66 and a connecting rod 64, the bolt 63 is inserted on adjacent inner sides of the two clamping blocks 62, so that the two clamping blocks 62 are pivoted with each other, the two clamping blocks 62 can be clamped and unfolded reciprocally from an inner clamping position to an outer expanding position under the action of an external force, a clamping groove 621 and a limiting groove 622 communicated with the clamping groove 621 are formed between the inner sides of the two clamping blocks 62, a second clamping portion 623 is formed on a groove wall of the limiting groove 622, the second clamping portion 623 is two clamping grooves 624 respectively located on inner wall surfaces of two sides of the limiting groove 622, the third spring 66 is abutted between the two clamping blocks 62 to provide an elastic pretension force for the two clamping blocks 62 to expand to the outer expanding position, and the connecting rod 64 has two cranks 641, a disc 642, a disc 641, and a connecting rod 64, An inner end pin 643 and an outer end pin 644, the inner end pin 643 is inserted and pivoted in the disc 642 and the adjacent inner end of the two cranks 641, such that the inner end pin 643 serves as a pivot point for the two cranks 641 to pivot, the outer end pin 644 is inserted and pivoted with the outer end of each crank 641 and each clamping block 62, respectively, such that the connecting rod 64 can swing between a retracted position to an extended position under the action of external force, and the outer surface of each weight block 61 is provided with a second fixing portion 65, respectively.

Therefore, the above description is a description of the components and assembly of the safety dumbbell set 100 according to a preferred embodiment of the present invention, and the following description is provided for the features of the safety dumbbell set:

when the user wants to adjust the number of the weight blocks of the weight unit 60 disposed on the handle 20, for example, the user wants to selectively disengage the number of the weight blocks 61 on the handle 20 to reduce the weight.

First, the dumbbell handle 20 is placed on the top surface of the receptacle 10 (as shown in fig. 7), the weights 61 on the dumbbell handle 20 are placed in the receiving grooves 121 of the receptacle 10 (as shown in fig. 8), and at the same time when the weights 61 contact the bottom of the receiving grooves 121, the top pillar 13 of the receptacle 10 passes through the action hole 416 of the dumbbell handle 20, so that the brake block 412 is pushed by the top pillar 13 to move from the braking position to the releasing position (i.e. the brake block 412 originally located at the braking position is pushed by the first spring 413 to be clamped in the braking groove 421 of the rotary disc 42, so that the handle 30, the rotary disc 42 and the selection disc 44 cannot rotate relative to the braking cover 41), but when the brake block 412 is pushed by the top pillar 13 to the releasing position, the stop block 412 is released from the stop groove 421, so that the handle 30, the rotary disc 42 and the selection disc 44 can rotate relative to the stop cover 41.

Then, the user can rotate the handle 30 on the receptacle 10 (as shown in fig. 8) to drive the rotating disc 42 to rotate relative to the braking cover 41, and determine the weight of the counterweight according to the weight value 422 appearing in the window 414, and the selecting plate 44 is driven by the handle 30 to rotate simultaneously while the handle 30 drives the rotating disc 42 to rotate, so as to adjust the relative position between the pressing unit 442 on the selecting plate 44 and the connecting rod 64 on the counterweight 61.

If the user selects the lightest weight, the releasing space 444 of each selecting plate 44 corresponds to the position of the connecting rod 64 of each weight 61, as shown in fig. 9, that is, the pressing block 443 of the pressing unit 442 in each selecting plate 44 does not contact with the connecting rod 64 (i.e., the connecting rod is kept at the retracted position), so that the two clamping blocks 62 of the weight 61 are pushed outward by the third spring 66 to be at the extended position, the clamping groove 621 of the weight 61 is not clamped and clamped with the handle 30, so that when the user takes the handle 30 off the receptacle 10, all the weights 46 are retained in the receiving groove 121 of the receptacle 10 (as shown in fig. 10), thereby achieving the effect of adjusting to the lightest weight.

When the user selects the heaviest weight, the pressing block 443 of the pressing unit 442 in each selecting plate 44 corresponds to the position of the connecting rod 64 of each weight 61, as shown in fig. 11, that is, the pressing block 443 of the pressing unit 442 in each selecting plate 44 presses against the disk 642 at the pivot point between the two cranks 641 of the connecting rod 64 (i.e., the connecting rod swings from the retracted position to the extended position), so that the two clamping blocks 62 of the weight 61 are pushed outward by the two cranks 641 of the connecting rod 64 to be in the clamped position, and the handle 30 is clamped by the clamping groove 621 of the weight 61, so that when the user lifts the handle 30 off the receptacle 10, all the weights 61 are separated from the receptacle 10, and simultaneously lifted by the handle 30 (as shown in fig. 12), so as to achieve the effect of adjusting to the heaviest weight.

When a user wants to leave a part of the weight 61 on the receptacle 10 and combine and hold another part of the weight 61 on the handle 30, some of the pressing blocks 443 of the pressing unit 442 in the selecting plate 44 correspond to the position of the connecting rod 64 of the weight 61, and some of the releasing gaps 444 of the selecting plate 44 correspond to the position of the connecting rod 64 of the weight 61 (as shown in fig. 13), so that some of the weights 61 are located at the inner clamping position, some of the weights are located at the outer expanding position, the weight 61 located at the inner clamping position is carried along with the handle 30, and the weight 61 located at the outer expanding position is left on the receptacle 10 (as shown in fig. 14), thereby achieving the effect of arbitrarily adjusting the weight.

In the above embodiment, the limiting member 46 of the handle 20 has the latch 462 of the first engaging portion 461, and the wall of the limiting groove 622 of the weight 61 has the engaging groove 624 of the second engaging portion 623. Therefore, when the clamping block 62 of the weight 61 is in the outward-extending position and is extended, the engaging groove 624 on the clamping block 62 is separated from the engaging block 462 on the dumbbell handle 20 (as shown in fig. 15), so that the weight 61 is not carried by the dumbbell handle 20 and can be retained on the receptacle 10, and when the clamping block 62 of the weight 61 is in the inward-clamping position and is clamped, the engaging block 462 on the dumbbell handle 20 is engaged with the engaging groove 624 of the weight 61 (as shown in fig. 16), so that the weight 61 can be carried by the dumbbell handle 20 and can serve as a second protection for preventing the weight 61 from falling off from the dumbbell handle 20 by itself (the first protection is that the handle 30 is held by the engaging groove 621 of the weight 61), thereby improving the safety of the present invention.

In the above embodiment, the first fixing portion 122 of the receptacle 10 is a protrusion 123 protruding from the bottom wall of the receiving slot 121, and two fixing slots 124 are disposed on two opposite sides of the protrusion 123, and the second fixing portion 65 of the counterweight block 61 of the counterweight unit 60 is a fixing protrusion 651 protruding from the inner corner of the bottom of each clamping block 62.

Therefore, when the weight 61 is placed in the receiving groove 121 of the receiving seat 10, if the clamping block 62 of the weight 61 is located at the outward-extending position for unfolding, the fixing protrusion 651 of the second fixing portion 65 of the weight 61 is engaged with the fixing groove 124 of the first fixing portion 122 of the receiving seat 10 (as shown in fig. 15), so as to fix the weight 61 on the receiving seat 10, thereby preventing the user from taking or misplacing the weight, and if the clamping block 62 of the weight 61 is located at the inward-clamping position for clamping, the fixing protrusion 651 of the second fixing portion 65 of the weight 61 is disengaged from the fixing groove 124 of the first fixing portion 122 of the receiving seat 10 (as shown in fig. 16), so that the weight 61 can be smoothly carried by the dumbbell handle 20 for use.

In addition, as shown in fig. 17 to 19, the first fixing portion 122 of the receptacle 10 is a protrusion 125 protruding inward from the top edges of the two sides of the receiving groove 121, and the second fixing portion 65 of the weight block 61 of the weight unit 60 is a recess 652 recessed from the outer side of each clamping block 62.

Therefore, when the weight 61 is placed in the receiving slot 121 of the receptacle 10, the groove 652 of the second fixing portion 65 of the weight 61 is engaged with the protrusion 125 of the first fixing portion 122 of the receptacle 10 (as shown in fig. 18) to fix the weight 61 on the receptacle 10 when the clamping block 62 of the weight 61 is in the outward-extending position for extending, so as to prevent the user from taking or misplacing, and when the clamping block 62 of the weight 61 is in the inward-clamping position for clamping, the protrusion 125 of the first fixing portion 122 of the receptacle 10 is separated from the groove 652 of the second fixing portion 65 of the weight 61 (as shown in fig. 19) to enable the weight 61 to be smoothly carried by the dumbbell handle 20 for use.

Therefore, in the present invention, in addition to the clamping by the clamping groove 621 of the weight block 61 and the handle 30, the second clamping portion 623 of the weight block 61 and the first clamping portion 461 of the dumbbell handle 20 can be clamped to maintain the double clamping effect, so as to prevent the weight block 61 from falling off by itself, thereby greatly improving the safety during use. The first fixing portion 123 of the receptacle 10 and the second fixing portion 65 of the weight 61 can lock the weight 61 on the receptacle 10 to prevent the weight from being taken or misplaced. Of course, the present invention can make the counterweight 61 perform a relatively precise and stable motion between the inward clamping position and the outward expanding position by the motion of the pressing block 443 of the pressing unit 442 and the connecting rod 64 (the two cranks 641) in the selecting plate 44, so as to overcome the loose situation between the counterweight 61 and the dumbbell handle 20.

The above disclosure is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the scope of the present invention, and all equivalent variations of the present invention that are obvious to those skilled in the art are also included in the scope of the present invention.

Claims

1. A set of safety dumbbells, characterized in that it essentially comprises:

the storage seat is provided with a seat body and two storage areas positioned on the top surface of the seat body, each storage area is provided with a plurality of parallel storage grooves, and a first fixing part is arranged in each storage groove;

the dumbbell handle is provided with a grab handle and two selection units respectively arranged at two ends of the grab handle, each selection unit is provided with a plurality of selection discs arranged at a preset interval, one side surface of each selection disc is provided with a pressing unit and at least one release gap, and each pressing unit is provided with at least one pressing block;

the counterweight unit comprises a plurality of counterweight blocks, each counterweight block is provided with two clamping blocks, a third spring and a connecting rod, the two clamping blocks are pivoted with each other and can be clamped and unfolded back and forth between an inner clamping position and an outer expanding position under the action of external force, a clamping groove is formed between the two clamping blocks, a second fixing part is arranged on the outer peripheral surface of each clamping block, the third spring is abutted against the space between the two clamping blocks to provide prestress for the two clamping blocks to be unfolded towards the outer expanding position, the connecting rod is pivoted between the two clamping blocks, the middle section of the connecting rod is provided with a pivot point and can be pivoted between an inner contracting position and an outer expanding position under the action of the external force;

when the connecting rod of the balancing weight corresponds to the compression unit of the dumbbell handle, the compression unit is abutted to pivot the connecting rod from the retracted position to the extended position, the two clamping blocks are clamped to the inner clamping position and clamped on the handle by the clamping groove, the first fixing part of the containing seat is separated from the second fixing part of the balancing weight, and the balancing weight is separated from the containing seat and clamped on the handle of the dumbbell handle;

when the connecting rod of the balancing weight corresponds to the releasing gap of the dumbbell handle, the pressing unit does not contact the connecting rod, so that the connecting rod is located at the retracted position, the third spring expands the two clamping blocks towards the expanded position, the clamping groove is separated from the grab handle, the first fixing part of the containing seat is clamped with the second fixing part of the balancing weight, and the balancing weight is separated from the grab handle and is kept on the containing seat.

2. The set of safety dumbbells according to claim 1, wherein: the storage seat is also provided with two top columns which are protruded on the top surface of the seat body, the selection unit of the dumbbell handle is also provided with a brake cover, a rotary table and a positioning group, the brake cover is provided with a protective cover, a brake block and a first spring, the protective cover is sleeved on the grab handle and can rotate relative to the grab handle, the protective cover is provided with a viewing window, a sliding chute which is positioned on the opposite side of the viewing window and an acting hole which is communicated with the sliding chute and has the width smaller than the width of the groove of the sliding chute, the brake block is arranged in the sliding chute and can be acted by external force to linearly and reciprocally slide between a release position and a brake position, the first spring is abutted between the brake block and the groove wall of the sliding chute to provide elastic prestress for the brake block to move to the brake position, the rotary table is fixedly connected on the grab handle and positioned in the protective cover of the brake cover, the circumferential surface of the rotary table is provided with a plurality of brake grooves and a plurality of weight values at equal angles, the positioning set is arranged between the brake cover and the rotary table to provide a proper rotary resistance between the rotary table and the brake cover, when the dumbbell handle is placed on the top surface of the containing seat, the top column on the containing seat can penetrate through the acting hole, the top column pushes the brake block to move from a braking position to a release position, so that the brake block is released out of the brake groove, and the grab handle, the rotary table and the selection disc can rotate relative to the brake cover.

3. A set of safety dumbbells according to claim 2, wherein: the positioning set has a plurality of positioning holes disposed on the rotary plate at equal angles, a positioning groove disposed on the protecting cover of the braking cover, a second spring disposed in the positioning groove, and a bead body pushed by the second spring toward the rotary plate.

4. A set of safety dumbbells according to claim 2, wherein: the selection unit is also provided with a limiting piece which is fixedly connected to the protecting cover of the brake cover and is provided with a plurality of first clamping parts, a limiting groove communicated with the clamping groove is formed between the inner sides of the two clamping blocks of the balancing weight, and a second clamping part is arranged on the groove wall of the limiting groove.

5. The set of safety dumbbells according to claim 4, wherein: the first clamping parts are clamping blocks symmetrically positioned on two outer side surfaces of the limiting part, and the second clamping parts are clamping grooves respectively positioned on inner wall surfaces of two sides of the limiting groove.

6. The set of safety dumbbells according to claim 1, wherein: the dumbbell handle is also provided with an elastic sleeve which is sleeved on the middle section of the handle.

7. The set of safety dumbbells according to claim 1, wherein: the balancing weight is also provided with a bolt which is inserted on the adjacent inner sides of the two clamping blocks so that the two clamping blocks are mutually pivoted.

8. The set of safety dumbbells according to claim 1, wherein: the connecting rod of the balancing weight is provided with two cranks, a disc, an inner end bolt and an outer end bolt, the inner end bolt is inserted and pivoted in the adjacent inner ends of the disc and the two cranks to ensure that the two cranks can movably pivot mutually, the outer end bolt respectively inserts and pivots the outer end of each crank and each clamping block, and the inner end bolt is used as a pivot point.

9. The set of safety dumbbells according to claim 1, wherein: the first fixing part of the containing seat is a convex block protruding from the wall surface of the bottom of the containing groove and two fixing grooves positioned on two opposite sides of the convex block, and the second fixing part of the counterweight block of the counterweight unit is a fixing convex block protruding from the inner side end angle of the bottom of each clamping block.

10. The set of safety dumbbells according to claim 1, wherein: the first fixing part of the containing seat is a convex block which protrudes inwards from the top edges of the two sides of the containing groove, and the second fixing part of the counterweight block of the counterweight unit is a groove which is sunken from the outer side edge of each clamping block.