Quickly-adjustable dumbbell

Abstract

A gear adjusting mechanism comprises a first shell, a third shell, a sliding piece, a spring and a plurality of gear shifting structures, the sliding piece and the spring are horizontally arranged in the third shell, one end of the spring is sleeved on the sliding piece, and the other end of the spring is fixed in the third shell; each gear shifting structure comprises a gear shifting unit, a button, an ejector rod and a sliding block, the buttons, the ejector rods and the sliding blocks are sequentially fixed from top to bottom, protrusions are arranged on the ejector rods, the sliding blocks are connected with the gear shifting units, diagonal planes for the protrusions to slide are arranged at the positions, corresponding to the protrusions, of the sliding pieces, and horizontal grooves corresponding to the protrusions in size are formed in the lower ends of the diagonal planes. According to the dumbbell, each gear is provided with a gear shifting structure, different gears can be switched by pressing buttons on different gears, the sliding piece and the spring structure do not need to worry about gear disengaging in the using process, and the rapid adjustable function of the dumbbell is achieved.

Description

Technical Field

[0001] The utility model relates to an adjusting dumbbell, in particular to a fast-adjusting dumbbell. Background Art

[0002] The existing quick-adjust dumbbells on the market have varying advantages and disadvantages. The POWERBOLCK is currently the most effective. This type of dumbbell uses a manually drawn pin to adjust the gear. However, the pin is made of plastic and is easily damaged by heavy impact loads during use. Plastic also ages easily, making it less able to withstand heavy loads and causing rapid damage. Furthermore, if a gear breaks, it needs to be replaced, which is inconvenient. Utility Model Content

[0003] In order to overcome the above-mentioned problems, the purpose of the present invention is to provide a quick-adjustable dumbbell. Each gear has a shift structure. Different gears can be switched by pressing buttons on different gears. The gears can be adjusted step by step or directly skipped. The sliding plate and spring structure do not need to worry about gear shifting during use, thereby realizing the quick adjustable function of the dumbbell.

[0004] In order to achieve the above object, the technical solution adopted by the present invention is: a quick-adjustment dumbbell, comprising a handle assembly and a plate assembly, the handle assembly comprising a handle body and an adjustment gear mechanism, the plate assembly comprising a plurality of plate pairs, the adjustment gear mechanism comprising a first housing, a third housing, a sliding plate and a spring horizontally arranged in the third housing, and a plurality of shift structures with the same number of the plate pairs, one end of the spring being sleeved on the sliding plate and the other end being fixed in the third housing; each of the shift structures comprising a shift unit, a button, a push rod and a slider fixed in sequence from top to bottom, the push rod being provided with a protrusion, the slider being connected to the shift unit, the shift units of the plurality of shift structures being arranged vertically spaced one by one, the buttons of the plurality of shift structures being horizontally spaced one by one on the third housing, an oblique surface for the sliding of the protrusion being provided at a position corresponding to each protrusion on the sliding plate, and a horizontal groove corresponding to the size of the protrusion being provided at the lower end of each oblique surface.

[0005] Furthermore, a slide is provided between the protrusions on each of the push rods, and all the slides are arranged horizontally and closely adjacent to each other. The slide is provided in the third shell close to the outer side of the slide, and sliding surfaces for the protrusions to slide are provided on both sides of the slide.

[0006] Furthermore, each of the shifting units includes a sliding assembly, a connecting rod with rotating gears at both ends, and a sliding rack assembly. The rotating gear at one end of the connecting rod is engaged with the sliding rack assembly, and the rotating gear at the other end is fixed to the sliding assembly. All of the sliding assemblies are vertically spaced apart and arranged in the third shell, and all of the sliding rack assemblies are vertically spaced apart and arranged in the first shell. The shifting unit is connected to the slider through the sliding assembly.

[0007] Furthermore, each of the sliding assemblies includes a first horizontal slider and a second horizontal slider, each of the first slider and the second slider is provided with a driving pulley on its proximal end, both sides of the slider are provided with an inclined sliding surface in contact with the driving pulley, and the first slider is provided with an engaging surface on one end proximal to the connecting rod for engaging with the corresponding rotating gear;

[0008] A first protrusion is provided on a side of the first slider, a first limiting groove is provided in the third housing, a first spring is provided in an outward position inside the first limiting groove, the first protrusion is located in an inward position inside the first limiting groove, one end of the first spring is fixed to the first protrusion, and the other end is fixed in the first limiting groove;

[0009] The second slider is provided with a second protrusion on its side, and the third housing is provided with a second limiting groove. A second spring is provided in the outward position within the second limiting groove, and the second protrusion is located in the inward position within the second limiting groove. One end of the second spring is fixed to the second protrusion, and the other end is fixed in the second limiting groove. A first iron insert is provided in the center of each first slider, and a second iron insert is provided in the center of each second slider. The outer surface is integrally injection-molded with a polymer material to ensure the slider's strength and aging resistance.

[0010] Furthermore, each of the sliding rack assemblies includes a first rack and a second rack, the first rack is engaged with the upper part of the corresponding rotating gear, and the second rack is engaged with the lower part of the corresponding rotating gear, and a first track for placing the first rack and a second track for placing the second rack are provided in the first shell.

[0011] Furthermore, a return spring is provided on the upper portion of each push rod, and the lower end of the return spring is fixed to the third housing. The return spring can be provided between the button and the protrusion, or at the lower end of the protrusion.

[0012] Furthermore, the handle body includes two support plates, a main handle positioned between the centers of the two support plates, and four main connecting rods connecting the two support plates and located at the four corners of the support plates. The two support plates, the main handles, and the main connecting rods can be connected by welding or threading to form a strong and stable structure. If the entire dumbbell is subjected to an impact, most of the force on the handle assembly is borne by the support plates.

[0013] Each bell plate pair includes two connecting rods and two bell plates fixed to the connecting rods. The relative position of the connecting rod and the corresponding sliding rack assembly of each bell plate pair is that when the sliding rack assembly moves out of the first shell and the two ends of the sliding rack assembly exceed the connecting rod, the connecting rod is located above the sliding rack assembly. Different sliding rack assemblies extend out of the first shell and set up different connecting rods to obtain different counterweights.

[0014] Furthermore, it also includes a second shell, and the outer end of the first shell is connected to the second shell.

[0015] Furthermore, the bell plate assembly also includes a buffer pad, which is located in the center of each bell plate. The buffer pad is made of a polymer material TPU to prevent the bell plate assembly from colliding with each other to produce noise when it is lowered and in use, and to prevent the surface of the bell plate from being scratched and affecting its appearance.

[0016] Furthermore, a hose is sleeved on the main connecting rod. The hose is provided to prevent the user's wrist from colliding with the main connecting rod during operation, and can play a buffering role when in contact.

[0017] The beneficial effects of the utility model are:

[0018] Each gear of the utility model has a shift structure. By pressing the button on the different gears, different gears can be switched. The gears can be adjusted step by step or directly jumped. The sliding plate and spring structure do not need to worry about the gear being out of gear during use, so the dumbbell can be quickly adjusted.

[0019] The sliding plate provided in the utility model avoids the phenomenon that the push rod is stuck and cannot be restored due to errors in the processing and assembly of the sliding plate during gear shifting;

[0020] The support plate of the utility model is embedded in the first shell and the third shell. If the entire dumbbell encounters an impact, most of the force on the handle assembly is borne by the support plate, which alleviates the problem of being unable to withstand impact loads during use;

[0021] The shifting of the utility model is achieved through a simple mechanical structure, which has the advantages of simple structure, convenient manufacturing and installation, stable operation, low noise, and no failure or damage due to plastic aging.

[0022] The above description is only an overview of the technical solution of the present invention. In order to more clearly understand the technical means of the present invention and to implement it according to the contents of the description, the following is a detailed description of the preferred embodiments of the present invention with the accompanying drawings. The specific implementation methods of the present invention are given in detail in the following embodiments and drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is a schematic structural diagram of Example 1 of the present utility model;

[0024] Figure 2 for Figure 1 A schematic diagram of the structure of the middle handle assembly;

[0025] Figure 3 for Figure 2 A schematic diagram of the structure of the middle handle body;

[0026] Figure 4 for Figure 1 Schematic diagram of the structure of the middle bell plate assembly;

[0027] Figure 5 for Figure 1 Schematic diagram of the structure of the middle adjustment gear mechanism;

[0028] Figure 6 for Figure 5 The structural diagram of the entire shift structure;

[0029] Figure 7 for Figure 5 A schematic diagram showing a portion of the entire shifting structure being disposed in the third housing;

[0030] Figure 8 for Figure 5 A schematic diagram of a gear shift structure;

[0031] Figure 9 for Figure 5 A schematic diagram of a gear shift structure;

[0032] Figure 10 for Figure 1 A schematic diagram of the internal structure of the first slider and the second slider;

[0033] Figure 11 for Figure 1 A schematic diagram of the arrangement of the first slider and the second slider in the third housing;

[0034] Figure 12 This is a partial structural diagram of the adjustment gear mechanism of Example 2 of the present utility model;

[0035] Figure 13This is a schematic diagram showing that part of the entire shift structure in Example 3 of the present utility model is disposed in the third housing;

[0036] Figure 14 This is a partial structural diagram of the adjustment gear mechanism of Example 4 of the present utility model.

[0037] Description of the numbers in the figure:

[0038] 1. Main handle, 2. Support plate, 3. Main connecting rod, 3-1, hose, 4. First shell, 5. Second shell, 6. Third shell, 6-1, First limiting slot, 6-2, Second limiting slot, 7. Button, 8. Slider, 9. Driving pulley, 10. First slider, 10-1, First protrusion, 10-2, First spring, 11. Second slider, 11-1, Second protrusion, 11-2, Second spring, 12. Push rod, 12-1, protrusion, 13. Sliding plate, 13-1, Beveled surface, 13-2, Groove, 14. Spring, 15. Connecting rod, 15-1, Rotating gear, 16-1, First rack, 16-2, Second rack, 17. Return spring, 18, First iron insert, 19, Second iron insert, 20. Connecting rod, 21, Bell plate, 22, Buffer pad, 23, Sliding plate. DETAILED DESCRIPTION

[0039] The present invention will be described in detail below with reference to the accompanying drawings and in combination with embodiments.

[0040] A quick-adjust dumbbell includes a handle assembly and a plate assembly. The handle assembly includes a handle body and an adjustment gear mechanism. The plate assembly includes a plurality of plate pairs. Each plate pair includes two connecting rods 20 and two plates 21 fixed to the connecting rods 20. The adjustment gear mechanism includes a first housing 4, a third housing 6, a sliding plate 13 and a spring 14 horizontally arranged in the third housing 6, and a plurality of shift structures that are the same in number as the plate pairs. One end of the spring 14 is sleeved on the sliding plate 13, and the other end is fixed in the third housing 6. Each shift structure includes The third housing 6 includes a shift unit, a button 7, a push rod 12 and a slider 8 fixed in sequence from top to bottom. The push rod 12 is provided with a protrusion 12-1. The slider 8 is connected to the shift unit. The shift units of the multiple shift structures are arranged vertically and spaced apart one by one. The buttons 7 of the multiple shift structures are arranged horizontally and spaced apart one by one on the third housing 6. At the position corresponding to each protrusion 12-1 on the sliding sheet 13, an oblique surface 13-1 for the protrusion 12-1 to slide is provided, and a horizontal groove 13-2 corresponding to the size of the protrusion 12-1 is provided at the lower end of each oblique surface 13-1.

[0041] The utility model can also be provided with a slide 23 between the protrusions 12-1 on the two push rods 12, and all the slides 23 are arranged horizontally and closely together. The slide 23 is set in the third shell 6 close to the outside of the slide 13, and both sides of the slide 23 are provided with sliding surfaces for the protrusions 12-1 to slide.

[0042] Each shift unit includes a sliding assembly, a connecting rod 15 with a rotating gear 15-1 at both ends, and a sliding rack assembly. The rotating gear 15-1 at one end of the connecting rod 15 is engaged with the sliding rack assembly, and the rotating gear 15-1 at the other end is fixed to the sliding assembly. All the sliding assemblies are vertically spaced and arranged in the third shell 6, and all the sliding rack assemblies are vertically spaced and arranged in the first shell 4.

[0043] Each sliding assembly includes a first horizontal slider 10 and a second slider 11. The first slider 10 and the second slider 11 are both provided with a driving pulley 9 on their proximal ends. Both sides of the slider 8 are provided with inclined sliding surfaces that contact the driving pulley 9. The first slider 10 is provided with an engaging surface on one end close to the connecting rod 15 that engages with the corresponding rotating gear 15-1.

[0044] A first protrusion 10-1 is provided on the side of the first slider 10, a first limiting groove 6-1 is provided in the third housing 6, a first spring 10-2 is provided in the outward position of the first limiting groove 6-1, the first protrusion 10-1 is located in the inward position of the first limiting groove 6-1, one end of the first spring 10-2 is fixed to the first protrusion 10-1, and the other end is fixed in the first limiting groove 6-1;

[0045] A second protrusion 11-1 is provided on the side of the second slider 11, a second limiting groove 6-2 is provided in the third shell 6, a second spring 11-2 is provided at the outward position inside the second limiting groove 6-2, the second protrusion 11-1 is located at the inward position inside the second limiting groove 6-2, one end of the second spring 11-2 is fixed to the second protrusion 11-1, and the other end is fixed in the second limiting groove 6-2.

[0046] The multiple shift structures are recorded as the first shift structure, the second shift structure, the third shift structure, the fourth shift structure...the Nth shift structure, the first shift structure includes a shift unit arranged vertically in the first position at the upper end, a button 7 horizontally arranged at the first position on the left end of the third shell 6, a top rod 12 fixed to the button 7 and a slider 8 connected to the shift unit; the second shift structure includes a shift unit arranged vertically in the second position at the upper end, a button 7 horizontally arranged at the second position on the left end of the third shell 6, a top rod 12 fixed to the button 7 and a slider 8 connected to the shift unit; the third shift structure includes a shift unit arranged vertically in the third position at the upper end, a button 7 horizontally arranged at the third position on the left end of the third shell 6, a top rod 12 fixed to the button 7 and a slider 8 connected to the shift unit; the fourth shift structure includes a shift unit arranged vertically in the fourth position at the upper end Unit, a button 7 horizontally arranged at the fourth position on the left end of the third shell 6, a top rod 12 fixed to the button 7 and a slider 8 connected to the shift unit...The Nth shift structure includes a shift unit vertically arranged at the Nth position on the upper end, a button 7 horizontally arranged at the Nth position on the left end of the third shell 6, a top rod 12 fixed to the button 7 and a slider 8 connected to the shift unit; due to the arrangement structure of the multiple shift units being vertically spaced one by one and the multiple buttons 7 being horizontally arranged one by one, the top rods 12 of the multiple shift structures are horizontally arranged from left to right, and the lengths become longer in sequence, the sliders 8 fixed to the top rod 12 are arranged from left to right in sequence, the driving pulleys 9 on the multiple shift units that cooperate with the sliders 8 are also arranged from left to right, the lengths of the first sliders 10 corresponding to the driving pulleys 9 on the multiple shift units become longer in sequence, and the lengths of the second sliders 11 become shorter in sequence.

[0047] A first iron insert 18 is provided at the center of each first slider 10 , and a second iron insert 19 is provided at the center of each second slider 11 . The outer sides are integrally injection-molded with a polymer material, thereby ensuring the strength and aging resistance of the sliders.

[0048] Each sliding rack assembly includes a first rack 16-1 and a second rack 16-2. The first rack 16-1 is engaged with the upper part of its corresponding rotating gear 15-1, and the second rack 16-2 is engaged with the lower part of its corresponding rotating gear 15-1. A first track for placing the first rack 16-1 and a second track for placing the second rack 16-2 are provided in the first shell 4.

[0049] The utility model can also be provided with a return spring 17 on the upper part of each push rod 12, and the lower end of the return spring 17 is fixed on the third housing 6. The return spring 17 can be arranged between the button 7 and the protrusion 12-1, and can also be arranged at the lower end of the protrusion 12-1.

[0050] The handle body consists of two support plates 2, a main handle 1 positioned between the two support plates 2, and four main connecting rods 3 connecting the two support plates 2 and located at the four corners of the support plates 2. The two support plates 2, the main handle 1, and the main connecting rods 3 can be connected by welding or threading, forming a strong and stable structure. If the entire dumbbell is subjected to an impact, the support plates 2 will bear most of the force on the handle assembly.

[0051] The relative position of the connecting rod 20 and the corresponding sliding rack assembly of each weight plate pair is such that when the sliding rack assembly moves out of the first housing 4 and both ends of the sliding rack assembly exceed the connecting rod 20, the connecting rod 20 is located above the sliding rack assembly. Different sliding rack assemblies extend out of the first housing 4 and set up different connecting rods 20 to obtain different counterweights.

[0052] The present invention may further include a second shell 5 , and the outer end of the first shell 4 is connected to the second shell 5 .

[0053] The present invention can also be provided with a buffer pad 22, which is located at the center of each bell piece 21. The buffer pad is made of a polymer material TPU to prevent the bell piece assembly from colliding with each other to produce noise when it is lowered and in use, and to prevent the surface of the bell piece from being scratched and affecting its appearance.

[0054] The utility model can also be provided with a hose 3-1 on the main connecting rod 3. The setting of the hose is to prevent the user's wrist from hitting the main connecting rod during operation and can play a buffering role when contacting.

[0055] Example 1:

[0056] See also Figures 1-11As shown, a quick-adjustment dumbbell includes a handle assembly and a plate assembly. The handle assembly includes a handle body and an adjustment gear mechanism. The plate assembly includes eight pairs of plates. Each pair of plates includes two connecting rods 20 and two plates 21 fixed to the connecting rods 20. A buffer pad 22 is located at the center of each plate 21. The buffer pad is made of a polymer material TPU to prevent the plate assembly from colliding with iron to produce noise when it is lowered or in use, and to prevent the surface of the plates from being scratched and affecting the appearance. The shift adjustment mechanism includes a first housing 4, a second housing 5, and a third housing 6, a sliding plate 13 and a spring 14 horizontally arranged within the third housing 6, and eight shift structures. One end of the spring 14 is mounted on the sliding plate 13 and the other end is fixed within the third housing 6. Each shift structure includes a shift unit, a button 7 fixed in sequence from top to bottom, a push rod 12, and a slider 8. The push rod 12 is provided with a protrusion 12-1, and the slider 8 is connected to the shift unit. The shift units of the eight shift structures are arranged vertically and spaced apart. The buttons 7 of the eight shift structures are horizontally spaced apart within the third housing 6. A chamfered surface 13-1 is provided at the position corresponding to each protrusion 12-1 on the sliding plate 13, for the protrusion 12-1 to slide. The lower end of each chamfered surface 13-1 is provided with a horizontal groove 13-2 corresponding to the size of the protrusion 12-1. The outer end of the first housing 4 is connected to the second housing 5.

[0057] Each shift unit consists of a sliding assembly, a connecting rod 15 with rotating gears 15-1 at each end, and a sliding rack assembly. All sliding assemblies are vertically spaced apart within the third housing 6, while all sliding rack assemblies are vertically spaced apart within the first housing 4. Each sliding assembly includes a first slider 10 and a second slider 11, each with a drive pulley 9 mounted on its adjacent ends. Both sides of the slider 8 are provided with inclined sliding surfaces that contact the drive pulley 9. The first slider 10, on the end closest to the connecting rod 15, has a meshing surface that meshes with the corresponding rotating gear 15-1.

[0058] A first protrusion 10-1 is provided on the side of the first slider 10, a first limiting groove 6-1 is provided in the third housing 6, a first spring 10-2 is provided in the outward position of the first limiting groove 6-1, the first protrusion 10-1 is located in the inward position of the first limiting groove 6-1, one end of the first spring 10-2 is fixed to the first protrusion 10-1, and the other end is fixed in the first limiting groove 6-1;

[0059] A second protrusion 11-1 is provided on the side of the second slider 11, a second limiting groove 6-2 is provided in the third shell 6, a second spring 11-2 is provided at the outward position inside the second limiting groove 6-2, the second protrusion 11-1 is located at the inward position inside the second limiting groove 6-2, one end of the second spring 11-2 is fixed to the second protrusion 11-1, and the other end is fixed in the second limiting groove 6-2.

[0060] Each first slider 10 is centrally located with a first iron insert 18, while each second slider 11 is centrally located with a second iron insert 19. The outer surfaces are integrally molded from a polymer material, ensuring the sliders' strength and aging resistance. Each sliding rack assembly includes a first rack 16-1 and a second rack 16-2. The first rack 16-1 meshes with the upper portion of its corresponding rotating gear 15-1, while the second rack 16-2 meshes with the lower portion of its corresponding rotating gear 15-1. A first track for the first rack 16-1 and a second track for the second rack 16-2 are located within the first housing 4.

[0061] The handle body includes two support plates 2, a main handle 1 positioned between the centers of the two support plates 2, and four main connecting rods 3 connecting the two support plates 2 and located at the four corners of the support plates 2. The two support plates 2, the main handles 1, and the main connecting rods 3 can be connected by welding or threading to form a strong and stable structure. If the entire dumbbell is subjected to an impact, most of the force on the handle assembly is borne by the support plates 2. The main connecting rods 3 are covered with a hose 3-1. The hose is provided to prevent the user's wrist from colliding with the main connecting rod during operation and to act as a buffer when contact is made.

[0062] The relative position of the connecting rod 20 and the corresponding sliding rack assembly of each weight plate pair is such that when the sliding rack assembly moves out of the first housing 4 and both ends of the sliding rack assembly exceed the connecting rod 20, the connecting rod 20 is located above the sliding rack assembly. Different sliding rack assemblies extend out of the first housing 4 and set up different connecting rods 20 to obtain different counterweights.

[0063] The working process of this utility model is:

[0064] When the button 7 is pressed downward, the push rod 12 fixed to the button 7 moves downward, and the protrusion 12-1 on the push rod 12 moves downward on the beveled surface 13-1 of the sliding plate 13, driving the sliding plate 13 to the left and compressing the spring 14; when the button 7 is pressed to the limit position, the protrusion 12-1 on the push rod 12 moves down into the groove 13-2 of the sliding plate 13, and the spring 14 drives the sliding plate 13 to the right under the action of the elastic force in order to restore, thereby locking the protrusion 12-1 on the push rod 12, realizing the locking function of the gear;

[0065] At the same time, the downward movement of the top rod 12 drives the slider 8 at the lower end to move downward, and the sliding surface of the slider 8 presses the driving pulleys 9 on both sides to respectively drive the first slider 10 and the second slider 11 to move outward, extend out of the third housing 6, and hook the corresponding pair of bell plates. The outward movement of the first slider 10 drives the first protrusion 10-1 to move inward and outward in the first limiting groove 6-1, thereby compressing the first spring 10-2. The outward movement of the second slider 11 drives the second protrusion 11-1 to move inward and outward in the second limiting groove 6-2, thereby compressing the second spring 11-2. At the same time, the movement of the first slider 10 drives the rotating gear 15-1 on the other side to rotate through the rotating gear 15-1 and the connecting rod 15 on the same side, thereby driving the first rack 16-1 and the second rack 16-2 to move out, extend out of the first housing 4, realize the extension function of the gear position, and hook the corresponding pair of bell plates.

[0066] When shifting gears, for example, to the third gear, the button 7 for the third gear is pressed, the push rod 12 of the third gear moves downward, and the protrusion 12-1 of the third gear moves downward on the corresponding beveled surface 13-1 on the sliding plate 13, driving the sliding plate 13 to move left and compressing the spring 14. At this time, the protrusion 12-1 on the push rod 12 of the previous gear leaves the groove 13-2 due to the left movement of the sliding plate 13, and the lock is released. The previously compressed first spring 10-2 and the second spring 11-2 recover and drive the first protrusion 10-1 and the second protrusion 11-1 to move inward, thereby driving the first slider 10 and the second slider 11 inward respectively. The driving pulleys 9 on both sides drive the slider 8 to move upward under the action of the sliding surface, thereby realizing the reset of the top rod 12 and the button 7 of the previous gear. Through the movement of the first slider 10, the first rack 16-1 and the second rack 16-2 are also moved inward and reset, thereby realizing the reset function of the previous gear; when the button 7 of the third gear is pressed to the limit position, the protrusion 12-1 on the top rod 12 of the third gear moves down into the groove 13-2 of the sliding plate 13, and the spring 14 drives the sliding plate 13 to move right under the action of elastic force in order to restore, thereby blocking the protrusion 12-1 on the top rod 12 of the third gear, realizing the gear shifting process;

[0067] At the same time, the downward movement of the top rod 12 of the third gear drives the slider 8 at the lower end to move downward. The sliding surface of the slider 8 presses the corresponding driving pulleys 9 on both sides to drive the first slider 10 of the third gear, and the second slider 11 moves outward respectively, extends out of the third housing 6, and hooks the corresponding bell plate pair. The outward movement of the first slider 10 of the third gear drives the first protrusion 10-1 to move inward and outward in the first limiting groove 6-1, thereby compressing the first spring 10-2 of the third gear. The outward movement of the second slider 11 of the third gear drives the second protrusion 11-1 to move inward and outward in the second limiting groove 6-2, thereby compressing the second spring 11-2 of the third gear; the movement of the first slider 10 of the third gear drives the rotating gear 15-1 on the other side to rotate through the rotating gear 15-1 and the connecting rod 15 on the same side, thereby driving the first rack 16-1 and the second rack 16-2 of the third gear to move out, extend out of the first housing 4, realize the extension function of the gear, hook the corresponding bell plate pair, and realize the gear shifting process.

[0068] Each gear of the present invention has a gear shifting structure. Different gears can be switched by pressing the buttons 7 on different gears. The gears can be adjusted step by step or directly jumped. The sliding piece 13 and the spring 14 structure do not need to worry about the gear being out of gear during use, thereby realizing the quick adjustable function of the dumbbell; the support plate 2 is embedded in the first shell 4 and the third shell 6. If the entire dumbbell encounters an impact, most of the force on the handle assembly is borne by the support plate 2, alleviating the problem of being unable to withstand impact loads during use; the gear shifting is achieved through a simple mechanical structure, the operation is stable, the noise is low, and there is no failure or damage due to plastic aging problems.

[0069] Example 2:

[0070] See also Figure 12 As shown, a quick-adjustable dumbbell is shown. The difference between this embodiment and embodiment 1 is that a slide 23 is provided between the protrusions 12-1 on each pair of push rods 12, and all the slides 23 are arranged horizontally and adjacent to each other. The slide 23 is provided in the third shell 6 near the outer side of the slide 13, and both sides of the slide 23 are provided with sliding surfaces for the protrusions 12-1 to slide.

[0071] The working principle of the slide 23 is:

[0072] When shifting gears, after pressing the button 7 downward, the push rod 12 fixed to the button 7 moves downward, and the protrusion 12-1 on the push rod 12 moves downward on the beveled surface 13-1 of the sliding plate 13. At the same time, the protrusion 12-1 also moves on the sliding surface of the sliding plate 23, causing the sliding plate 23 to move left and right. At this time, if the push rod 12 of the previous gear is stuck due to errors in the processing and assembly of the sliding plate 13, it will be reset due to the lateral squeezing of the sliding plate 23, avoiding the phenomenon that the sliding plate 13 is stuck and cannot be restored due to errors in the processing and assembly of the sliding plate 13 when shifting gears. The sliding plates 23 are arranged closely to each other, so the sliding of one sliding plate 23 will drive all the sliding plates 23 to slide, which can achieve successive adjustment and direct gear skipping.

[0073] Example 3:

[0074] See also Figure 13 As shown, a quick-adjust dumbbell is shown. The difference between this embodiment and embodiment 1 is that a return spring 17 is also provided on the upper part of each push rod 12, the lower end of the return spring 17 is fixed on the third shell 6, and the return spring 17 is provided at the lower end of the protrusion 12-1.

[0075] The working principle of the return spring 17 is:

[0076] After pressing the button 7 downward, the push rod 12 fixed with the button 7 moves downward, and the return spring 17 is compressed; when it is time to shift gears, for example, to the third gear, the button 7 for the third gear is pressed, the push rod 12 for the third gear moves downward, and the return spring 17 for the third gear is compressed, and the protrusion 12-1 for the third gear moves downward on the corresponding beveled surface 13-1 on the sliding plate 13, driving the sliding plate 13 to move left to compress the spring 14. At this time, the push rod 12 of the previous gear is released due to the left movement of the sliding plate 13. The protrusion 12-1 on the upper portion leaves the groove 13-2, and the lock is released. The reset spring 17 of the previous gear needs to be restored to drive the button 7 and the push rod 12 of the previous gear to move upward to achieve reset. The upward movement of the push rod 12 drives the slider 8 to move upward. The driving pulleys 9 on both sides drive the first slider 10 and the second slider 11 to move inward under the action of the sliding surface to achieve reset. Through the movement of the first slider 10, the first rack 16-1 and the second rack 16-2 are also moved inward and reset, thereby realizing the reset function of the previous gear.

[0077] When the first spring 10-2 and the second spring 11-2 cannot be restored after being compressed and cannot drive the button 7 and the push rod 12 to reset, the reset spring 17 makes up for this function, and there is no need to rely solely on the first spring 10-2 and the second spring 11-2 to reset the button 7 and the push rod 12. In this way, the use effect and service life of the utility model will be better.

[0078] Example 4:

[0079] See also Figure 14As shown, a quick-adjust dumbbell is shown. The difference between this embodiment and embodiment 2 is that a return spring 17 is also provided on the upper part of each push rod 12, the lower end of the return spring 17 is fixed on the third shell 6, and the return spring 17 is provided at the lower end of the protrusion 12-1.

[0080] The slide plate 23 and the return spring 17 provided in the present invention not only avoid the phenomenon that the slide plate 13 becomes stuck and cannot be restored due to errors in processing and assembling when shifting, but also no longer rely solely on the first spring 10-2 and the second spring 11-2 to achieve the reset of the button 7 and the push rod 12, and the use effect is more ideal.

[0081] The above implementation methods are only for illustrating the technical concept and features of the utility model. Its purpose is to enable people familiar with this technology to understand the content of the utility model and implement it. It cannot be used to limit the scope of protection of the utility model. Any equivalent changes or modifications made according to the spirit of the utility model should be included in the scope of protection of the utility model.

Claims

1. A quick-adjust dumbbell comprising a handle assembly and a plate assembly, wherein the handle assembly comprises a handle body and an adjustment gear mechanism, and the plate assembly comprises a plurality of plate pairs, characterized in that: The gear adjustment mechanism comprises a first housing (4), a third housing (6), a sliding plate (13) and a spring (14) horizontally arranged in the third housing (6), and a plurality of shifting structures having the same number as the bell plate pairs, wherein one end of the spring (14) is sleeved on the sliding plate (13) and the other end is fixed in the third housing (6); each of the shifting structures comprises a shifting unit, a button (7) fixed in sequence from top to bottom, a push rod (12) and a slider (8), wherein the push rod (12) is provided with a protrusion (12-1) The slider (8) is connected to the shift unit, the shift units of the plurality of shift structures are arranged vertically and spaced apart one by one, the buttons (7) of the plurality of shift structures are arranged horizontally and spaced apart one by one on the third housing (6), and a chamfered surface (13-1) for the projection (12-1) to slide is provided at a position corresponding to each projection (12-1) on the sliding sheet (13), and a horizontal groove (13-2) corresponding to the size of the projection (12-1) is provided at the lower end of each chamfered surface (13-1).

2. The quick-adjust dumbbell according to claim 1, characterized in that: A slide (23) is provided between the protrusions (12-1) on each of the push rods (12), and all the slides (23) are arranged horizontally and closely adjacent to each other. The slides (23) are provided in the third housing (6) close to the outer side of the slide (13), and both sides of the slide (23) are provided with sliding surfaces for the protrusions (12-1) to slide.

3. The quick-adjust dumbbell according to claim 1 or 2, characterized in that: Each of the shifting units comprises a sliding assembly, a connecting rod (15) with rotating gears (15-1) at both ends, and a sliding rack assembly. The rotating gear (15-1) at one end of the connecting rod (15) is meshed with the sliding rack assembly, and the rotating gear (15-1) at the other end is fixed to the sliding assembly. All of the sliding assemblies are arranged vertically and spaced apart in the third housing (6), and all of the sliding rack assemblies are arranged vertically and spaced apart in the first housing (4). The shifting unit is connected to the slider (8) via the sliding assembly.

4. The quick-adjust dumbbell according to claim 3, characterized in that: Each of the sliding assemblies comprises a first horizontal slider (10) and a second slider (11), the first slider (10) and the second slider (11) are both provided with a driving pulley (9) at their adjacent ends, both sides of the slider (8) are provided with an inclined sliding surface in contact with the driving pulley (9), and the first slider (10) is provided with an engaging surface engaged with the corresponding rotating gear (15-1) at one end close to the connecting rod (15); A first protrusion (10-1) is provided on the side of the first slider (10), a first limiting groove (6-1) is provided in the third housing (6), a first spring (10-2) is provided in an outward position inside the first limiting groove (6-1), the first protrusion (10-1) is located in an inward position inside the first limiting groove (6-1), one end of the first spring (10-2) is fixed to the first protrusion (10-1), and the other end is fixed in the first limiting groove (6-1); A second protrusion (11-1) is provided on the side of the second slider (11), a second limiting groove (6-2) is provided in the third housing (6), a second spring (11-2) is provided in an outward position inside the second limiting groove (6-2), the second protrusion (11-1) is located in an inward position inside the second limiting groove (6-2), one end of the second spring (11-2) is fixed to the second protrusion (11-1), and the other end is fixed in the second limiting groove (6-2).

5. The quick-adjust dumbbell according to claim 4, characterized in that: Each of the sliding rack assemblies comprises a first rack (16-1) and a second rack (16-2), wherein the first rack (16-1) is meshed with the upper portion of the corresponding rotating gear (15-1), and the second rack (16-2) is meshed with the lower portion of the corresponding rotating gear (15-1), and a first track for placing the first rack (16-1) and a second track for placing the second rack (16-2) are provided in the first housing (4).

6. The quick-adjust dumbbell according to claim 5, characterized in that: A return spring (17) is also provided on the upper portion of each push rod (12), and the lower end of the return spring (17) is fixed on the third housing (6).

7. The quick-adjust dumbbell according to claim 6, characterized in that: The handle body comprises two support plates (2), a main handle (1) arranged between the centers of the two support plates (2), and four main connecting rods (3) connecting the two support plates (2) and located at the four corners of the support plates (2); Each bell piece pair comprises two connecting rods (20) and two bell pieces (21) fixed to the connecting rods (20); the relative position of the connecting rod (20) and the corresponding sliding rack assembly of each bell piece pair is such that when the sliding rack assembly moves out of the first housing (4) and both ends of the sliding rack assembly exceed the connecting rod (20), the connecting rod (20) is located above the sliding rack assembly.

8. The quick-adjust dumbbell according to claim 7, characterized in that: It also includes a second shell (5), and the outer end of the first shell (4) is connected to the second shell (5).

9. The quick-adjust dumbbell according to claim 8, characterized in that: The bell plate assembly further comprises a buffer pad (22), and the buffer pad (22) is located at the center of each bell plate (21).

10. The quick-adjust dumbbell according to claim 9, characterized in that: A hose (3-1) is sleeved on the main connecting rod (3).

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