Adjustable exercise device

Abstract

An adjustable dumbbell 2, 3 supported on a receptacle 10, comprising a handle bar 40, 50 having first and second housings 41, 42, 51, 52 for selectively coupling to weight members or rings 20, 21, 30,

Description

ADJUSTABLE EXERCISE DEVICE The invention relates to an adjustable exercise device, such as an adjustable barbell, kettle bell, or dumbbell having an improved structure or configuration for easily and quickly coupling the weight members of the dumbbell together and for preventing the weight members of the adjustable dumbbell from being disengaged or separated from each other, and arranged for allowing the weight or the size or the standard of the weight members or of the adjustable exercise device or the adjustable dumbbell to be suitably increased. Various kinds of typical adjustable barbells, kettle bells, or dumbbells have been developed and provided for conducting various exercise operations, for example, U.S. Patent No. 5,407,413 to Kupferman, U.S. Patent No. 5,839,997 to Roth et al., U.S. Patent No. 6,656,093 to Chen, U.S. Patent No. 7,223,214 to Chen, U.S. Patent No. 7,731,641 to Chen, U.S. Patent No. 7,811,213 to Chen, U.S. Patent No. 9,616,273 to Chen, and U.S. Patent No. 10,343,010 to Chen disclose several of the typical adjustable dumbbells each including a number of weight rings or weight members that may be selectively or adjustably secured together for adjusting the weight of the dumbbells. Normally, in the typical adjustable dumbbells, a single central handle bar is provided to be engaged with or between the weight rings or the weight members, and the weight rings or the weight members are to be disposed and engaged on the end portions of the central handle bar. ‘When the weight rings or the weight members include a relatively smaller weight, such as a weight less than fifty (50) pounds, for example, the weight rings or the weight members may be solidly and stably engaged on the end portions of the central handle bar. However, when the weight rings or the weight members include a relatively greater weight, such as a weight greater than sixty or seventy pounds, for example, the weight rings or the weight members may not be solidly and stably engaged on the end portions of the central handle bar, and may have a good chance to be disengaged or separated from the handle bar, or the user may feel that the weight rings or the weight members may not be solidly and stably held and carried with the central handle bar. It is accordingly an object of the present invention to provide an adjustable barbell, kettle bell, or dumbbell including an improved structure or configuration for easily and quickly coupling the weight members of the dumbbell together and for preventing the weight members of the adjustable dumbbell from being disengaged or separated from each other. The other objective of the invention is to provide an adjustable barbell, kettle bell, or dumbbell arranged for allowing the weight or the size or the standard of the weight members or of the adjustable exercise device or the adjustable dumbbell to be suitably increased. SUMMARY OF THE INVENTION According to the invention there is provided an adjustable dumbbell comprising:- a receptacle including a first passage formed in the receptacle, a first dumbbell including a first weight ring and a second weight ring supported on the receptacle, a handle mechanism including a handle bar having a first housing and a second housing to be coupled to the first and the second weight rings selectively, the first and the second housings each including a chamber formed in the first and the second housings respectively, and a protrusion extended into the chamber of each of the first and the second housings respectively, a first and a second weight members supported on the receptacle and engageable into the chamber of the first housing, the first and the second weight members each including a space formed in the first and the second weight members respectively for receiving and engaging with the protrusion of the first housing, two grooves being formed in each of the first and the second weight members and communicating with the space of the first and the second weight members respectively, two spring biased catches slidably engaged in the grooves of each of the first and the second weight members and either extendible into the space of each of the first and the second weight members or engageable in the grooves of each of the first and the second weight members,two arms being engaged in each of the first and the second weight members and coupled to the spring biased catches respectively for moving the spring biased catches into and out of the space of each of the first and the second weight members, a carrier slidably received and engaged in the receptacle, and including a first pole and a first stud extended from the carrier and extendible upwardly through the first passage of the receptacle for engaging with the arms respectively, the first pole being higher than the first stud, the carrier including a cam member having a first and a second seats, at least one spring biasing member disposed in the receptacle and engaged with the carrier for biasing and forcing the first pole and the first stud to engage with the arms and to disengage the spring biased catches from the space of each of the first and the second weight members, and an actuator engageable with the first and the second seats of the cam member for moving the carrier downwardly relative to the receptacle, and to control an engagement of the first pole and the first stud with the arms. The receptacle includes an upper panel, and the actuator is rotatably connected to the receptacle. The upper panel of the receptacle includes a slot formed in the upper panel, and the actuator includes a projection engaged in the slot of the upper panel for limiting and guiding the actuator to move relative to the receptacle. The receptacle includes a knob secured to the projection for anchoring the actuator to the receptacle. The first and the second weight members each include two compartments formed in the first and the second weight members and communicating with the grooves of each of the first and the second weight members for receiving and engaging with the arms respectively. The compartments of each of the first and the second weight members are communicating with each other at a middle opening, the arms of the first and the second weight members each include a first end portion connected to the spring biased catches, and a second end portion engaged in the opening of each of the first and the second weight members. The receptacle includes a second passage formed in the receptacle, the carrier includes a second pole and a second stud extended from the carrier and extendible upwardly through the second passage of the receptacle, the first dumbbell includes a third and a fourth weight members supported on the receptacle and engageable into the chamber of the second housing, the third and the fourth weight members each include a space formed in the third and the fourth weight members respectively for receiving and engaging with the protrusion of the second housing, two grooves being formed in each of the third and the fourth weight members and communicating with the space of the third and the fourth weight members respectively, two second spring biased catches slidably engaged in the grooves of each of the third and the fourth weight members and either extendible into the space of each of the third and the fourth weight members or engageable in the grooves of each of the third and the fourth weight members, two arms being engaged in each of the third and the fourth weight members and coupled to the spring biased catches for moving the spring biased catches into and out of the space of each of the third and the fourth weight members respectively. A second dumbbell may further be provided and includes a third weight ring and a fourth weight ring supported on the receptacle, the receptacle includes a third passage formed in the receptacle, a second handle mechanism includes a handle bar having a third housing and a fourth housing to be coupled to the third and the fourth weight rings selectively, the third and the fourth housings each include a chamber formed in the third and the fourth housings respectively, and a protrusion is extended into the chamber of each of the third and the fourth housings respectively, a first and a second weight elements are supported on the receptacle and engageable into the chamber of the third housing, the first and the second weight elements each include a space formed in the first and the second weight elements respectively for receiving and engaging with the protrusion of the third housing, two grooves are formed in each of the first and the second weight elements and communicating with the space of the first and the second weight elements respectively, two second spring biased catches are slidably engaged in the grooves of each of the first and the second weight elements and either extendible into the space of each of the first and the second weight elements or engageable in the grooves of each of the first and the second weight elements, two second arms are engaged in each of the first and the second weight elements and coupled to the second spring biased catches respectively for moving the second spring biased catches into and out of the space of each of the first and the second weight elements, the carrier includes a third pole and a third stud extended from the carrier and extendible upwardly through the third passage of the receptacle for engaging with the second arms respectively, the third pole being higher than the third stud. The receptacle includes a fourth passage formed in the receptacle, the carrier includes a fourth pole and a fourth stud extended from the carrier and extendible upwardly through the fourth passage of the receptacle, the second dumbbell includes a third and a fourth weight elements supported on the receptacle and engageable into the chamber of the fourth housing, the third and the fourth weight elements each include a space formed in the third and the fourth weight elements respectively for receiving and engaging with the protrusion of the fourth housing, two grooves being formed in each of the third and the fourth weight elements and communicating with the space of the third and the fourth weight elements respectively, two second spring biased catches slidably engaged in the grooves of each of the third and the fourth weight elements and either extendible into the space of each of the third and the fourth weight elements or engageable in the grooves of each of the third and the fourth weight elements, two arms being engaged in each of the third and the fourth weight elements and coupled to the spring biased catches for moving the spring biased catches into and out of the space of each of the third and the fourth weight elements respectively. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view of an adjustable dumbbell; FIG. 2 is a partial exploded view of the adjustable dumbbell; FIG. 3 is another partial exploded view of the adjustable dumbbell; FIG. 4 is a further partial exploded view of the adjustable dumbbell; FIG. 5 is a side plan schematic view of the adjustable dumbbell, in which the dumbbell is disengaged or separated from the lower supporting base or receptacle; FIG. 6 is a partial cross sectional view of the adjustable dumbbell, taken along lines 6-6 of FIG. 5; FIG. 7 is a partial cross sectional view of the adjustable dumbbell, taken along lines 7-7 of FIG. 5; FIG. 8 is a front plan schematic view of the adjustable dumbbell, in which the dumbbells are disengaged or separated from the lower supporting base or receptacle; FIG. 9 is a partial cross sectional view of the adjustable dumbbell, taken along lines 9-9 of FIG. 8; FIGS. 10, 11 are partial cross sectional views similar to FIG. 9, illustrating the operation of the adjustable dumbbell assembly; FIG. 12 is a partial perspective view of the adjustable dumbbell; and FIGS. 13, 14 are further partial perspective views similar to FIG. 12, illustrating the operation of the adjustable dumbbell assembly. DESCRIPTION OF THE PREFERRED EMBODIMENT Referring to FIGS. 1-4, an adjustable exercise device, such as an adjustable barbell, kettle bell, or dumbbell comprises a supporting base or receptacle 10 including one or more (such as four) compartments or depressions or recesses 11 formed therein for selectively receiving or engaging with four groups of weights 20, 21, 30, 31, such as weight plates or members or elements or weight rings of two dumbbells 2, 3 or first and second dumbbells 2, 3, and including one or more (such as four) seats or depressions 12, 13, 14, 15 formed or provided in the receptacle 10 and arranged or located between the recesses 11 of the receptacle 10 respectively, and / or disposed and arranged or located beside and communicating with the recesses 11 of the receptacle 10 respectively, and / or formed and arranged or located beside the four groups of the weight rings 20, 21, 30, 31, best shown in FIGS. 2 and 3. The receptacle 10 includes one or more (such as four) passages 16 formed therein and communicating with the depressions 12, 13, 14, 15 of the receptacle 10 respectively. The dumbbells 2, 3 each include a handle mechanism 4, 5 to be disposed and engaged between the groups of the weight rings 20, 21; 30, 31, the first and the second handle mechanisms 4, 5 each include a central handle bar 40, 50 having one or more (such as two) end members or end housings 41, 42; 51, 52 disposed or extended radially and outwardly from the end portions thereof respectively. The housings 41, 42; 51, 52 each include a space or chamber 43, 53 formed therein (FIGS. 1-3) for receiving or engaging with one or more (such as two) further weight rings or weight plates or members or elements, such as first and second weight members 60, 61 and first and second weight elements 62, 63, the housings 41, 42; 51, 52 each include a frame or protrusion 44 (FIGS. 6, 7) extended into the chamber 43, 53 thereof respectively, and one or more (such as two) lock notches 45 formed in the respective protrusion 44. One or more (such as four) latches 47 (FIG. 2) are slidably received or engaged in the handle bars 40, 50 and extendible out of the housings 41, 42; 51, 52 and engageable with the weight rings 20, 21; 30, 31, for selectively and detachably or changeably anchoring or retaining or positioning or coupling a required or predetermined number of the weight rings 20, 21; 30, 31, to the housings 41, 42; 51, 52 and the handle bars 40, 50 of the handle mechanism 4, 5. The engagement of the latches 47 with the weight rings 20, 21; 30, 31 is typical and is not related to the invention and will not be described in further details. As shown in FIGS. 2 and 6-7, the weight members 60, 61 and the weight elements 62, 63 each include a cavity or notch or space 64 formed therein, such as formed in the middle or intermediate portion thereof, and each include one or more (such as two) channels or grooves 65 formed therein and communicating with the space 64 of the weight members 60, 61 and the weight elements 62, 63 respectively, and each include one or more (such as two) chambers or compartments 66 formed therein and communicating with the grooves 65 respectively, and the compartments 66 of each of the weight members 60, 61 and the weight elements 62, 63 are intersected or communicating with each other at a middle or intermediate central hole or opening 67. A pair of spring biased latches or tongues or catches 70 are slidably received or engaged in the grooves 65 of the weight members 60, 61 and the weight elements 62, 63 respectively, and biased and forced to be extended or moved into the space 64 of the weight members 60, 61 and the weight elements 62, 63 respectively, and two levers or arms 71 are slidably received or engaged in the compartments 66 of the weight members 60, 61 and the weight elements 62, 63 respectively, and the arms 71 each include one or first end portion 72 pivotally or rotatably connected or coupled to the spring biased catches 70 for pulling or moving the catches 70 into the grooves 65 of the weight members 60, 61 and the weight elements 62, 63 respectively (FIG. 7), and for disengaging the catches 70 from the space 64 of the weight members 60, 61 and the weight elements 62, 63 respectively. The arms 71 each include an other or second end portion 73 extended or located or engaged in the opening 67 of the weight members 60, 61 and the weight elements 62, 63 respectively. As shown in FIG. 7, when the other or second end portions 73 of the arms 71 are forced or moved upwardly into the compartments 66 of the weight members 60, 61 and the weight elements 62, 63, the arms 71 are arranged to force or move the catches 70 into the grooves 65 of the weight members 60, 61 and the weight elements 62, 63 respectively. On the contrary, as shown in FIG. 6, when the other or second end portions 73 of the arms 71 are released or are not forced to move upwardly into the compartments 66 of the weight members 60, 61 and the weight elements 62, 63, the spring biased catches 70 may be biased and forced to move out of the grooves 65 and into the space 64 of the weight members 60, 61 and the weight elements 62, 63 respectively. As shown in FIGS. 3-4, 6-7, and 9-11, a plate or carrier 80 is slidably received or engaged in the receptacle 10, and includes one or more (such as four) poles 81 and one or more (such as four) studs 82 extended upwardly from the carrier 80 and extendible upwardly through the passages 16 and into the depressions 12, 13, 14, 15 of the receptacle 10 respectively for contacting or engaging with the other or second end portions 73 of the arms 71 of the weight members 60, 61 and the weight elements 62, 63 respectively, and one or more spring biasing members 83 are disposed or provided in the receptacle 10 and engaged with the carrier 80 for biasing and forcing the poles 81 and the studs 82 to move into the depressions 12, 13, 14, 15 of the receptacle 10 respectively, in which it is preferable that the poles 81 are higher than the studs 82. The carrier 80 includes one or more (such as three) protrusions or bulges or cam members 84 extended upwardly from the carrier 80 and preferably arranged in a circle, and the cam members 84 each include one or more (such as two) steps or seats 85, 86 formed or provided thereon. Another cam member or actuator 90 is pivotally or rotatably received or engaged in the receptacle 10, and contactable or engageable with the cam members 84 of the carrier 80. For example, as shown in FIG. 3, the receptacle 10 includes an upper plate or panel 17 having the recesses 11 and the depressions 12, 13, 14, 15 and the passages 16 formed therein, and having one or more (such as three) curved channels or grooves or slots 18 formed therein, and the actuator 90 includes one or more (such as three) protrusions or projections 91 extended upwardly therefrom and slidably received or engaged in the slots 18 of the upper panel 17 of the receptacle 10 for limiting and guiding the actuator 90 to pivot or rotate relative to the receptacle 10, and to contact or engage with the cam members 84 of the carrier 80. A knob 92 may be attached or mounted or secured or coupled to the projections 91 for anchoring or retaining or positioning the actuator 90 to the receptacle 10, and for pivoting or rotating the actuator 90 relative to the receptacle 10. The actuator 90 includes one or more (such as three) cams or protuberances 93 for contacting or engaging with the seats 85, 86 of the cam members 84 of the carrier 80 (FIGS. 12-14), In operation, as shown in FIGS. 8-9 and 12, when the protuberances 93 of the actuator 90 are disengaged or separated from the cam members 84, the poles 81 and the studs 82 may be biased and forced to move upwardly to engage with the other or second end portions 73 of the arms 71 of the weight members 60, 61 and the weight elements 62, 63 respectively, and to force or move the catches 70 into the grooves 65 and offset from the space 64 of the weight members 60, 61 and the weight elements 62, 63 respectively. At this moment, as shown in FIG. 7, when the catches 70 are forced to move into the grooves 65 and offset from the space 64 of the weight members 60, 61 and the weight elements 62, 63, the catches 70 are disengaged or separated from the protrusions 44 of the housings 41, 42; 51, 52, such that the weight members 60, 61 and the weight elements 62, 63 may not be engaged with and attached to the housings 41, 42; 51, 52 of the handle mechanisms 4, 5 (FIG. 9). As shown in FIGS. 10 and 13, when the protuberances 93 of the actuator 90 are forced to contact or engage with the cam members 84 of the carrier 80, such as engage with the first seats 85 of the cam members 84, the carrier 80 may be moved downwardly to disengage or separate the studs 82 from the weight members 61 and the weight elements 63, and thus allows the weight members 61 and the weight elements 63 to be attached or mounted or secured or coupled to the housings 41, 42; 51, 52 of the handle mechanisms 4, 5 (FIG. 10). As shown in FIGS. 11 and 14, when the protuberances 93 of the actuator 90 are forced to contact or engage with the cam members 84 of the carrier 80, such as engage with the second seats 86 of the cam members 84, the carrier 80 may further be moved downwardly to disengage or separate both the poles 81 and the studs 82 from the weight members 60, 61 and the weight elements 62, 63, and thus allows the weight members 60, 61 and the weight elements 62, 63 to be attached or mounted or secured or coupled to the housings 41, 42; 51, 52 of the handle mechanisms 4, 5 (FIG. 11). It is only required to pivot or rotate the actuator 90 relative to the receptacle 10, and to engage with and to actuate the cam members 84 of the carrier 80 to move the carrier 80 downwardly relative to the receptacle 10, and to control the engagement of the poles 81 and the studs 82 with the weight members 60, 61 and the weight elements 62, 63. Accordingly, the adjustable dumbbell includes an improved structure or configuration for easily and quickly coupling the weight members of the dumbbell together and for preventing the weight members of the adjustable dumbbell from being disengaged or separated from each other, and arranged for allowing the weight or the size or the standard of the weight members or of the adjustable exercise device or the adjustable dumbbell to be suitably increased.

Claims

CLAIMS:- 1. An adjustable dumbbell comprising: a receptacle including a first passage formed in the receptacle, a first dumbbell including a first weight ring and a second weight ring supported on the receptacle, a handle mechanism including: a handle bar having a first housing and a second housing to be coupled to the first and the second weight rings selectively, the first housing including a chamber formed in the first housing, and a protrusion extended into the chamber of the first housing, a first weight member supported on the receptacle and engageable into the chamber of the first housing, the first weight member including a space formed in the first weight member for receiving and engaging with the protrusion of the first housing, two grooves being formed in the first weight member and communicating with the space of the first weight member, two first spring biased catches slidably engaged in the grooves of the first weight member and either extendible into the space of the first weight member or engageable in the grooves of the first weight member, two first arms being engaged in the first weight member and coupled to the first spring biased catches respectively for moving the first spring biased catches into and out of the space of the first weight member, a carrier slidably received and engaged in the receptacle, and including a first pole extended from the carrier and extendible upwardly through the first passage of the receptacle for engaging with the first arms, the carrier including a cam member, at least one spring biasing member disposed in the receptacle and engaged with the carrier for biasing and forcing the first pole to engage with the first arms and to disengage the first spring biased catches from the space of the first weight member, and an actuator engageable with the cam member for moving the carrier downwardly relative to the receptacle, and to control an engagement of the first pole with the first arms.

2. An adjustable dumbbell as claimed in claim 1, wherein the receptacle includes an upper panel, and the actuator is rotatably connected to the receptacle.

3. An adjustable dumbbell as claimed in claim 2, wherein the upper panel of the receptacle includes a slot formed in the upper panel, and the actuator includes a projection engaged in the slot of the upper panel for limiting and guiding the actuator to move relative to the receptacle.

4. An adjustable dumbbell as claimed in claim 3, wherein the receptacle includes a knob secured to the projection for anchoring the actuator to the receptacle.

5. An adjustable dumbbell as claimed in claim 1, wherein a second weight member is supported on the receptacle and engageable into the chamber of the first housing, the second weight member includes a space formed in the second weight member for receiving and engaging with the protrusion of the first housing, two grooves being formed in the second weight member and communicating with the space of the second weight member, two second spring biased catches slidably engaged in the grooves of the second weight member and either extendible into the space of the second weight member or engageable in the grooves of the second weight member, two second arms are engaged in the second weight member and coupled to the second spring biased catches for moving the second spring biased catches into and out of the space of the second weight member, the carrier includes a first stud extended from the carrier and extendible upwardly through the first passage of the receptacle for engaging with the second arms, the first pole is higher than the first stud, the cam member includes a first and a second seats, and the actuator is engageable with the first and the second seats of the cam member for moving the carrier downwardly relative to the receptacle, and to control an engagement of the first pole and the first stud with the arms.

6. An adjustable dumbbell as claimed in claim 5, wherein the first and the second weight members each include two compartments formed in the first and the second weight members and communicating with the grooves of each of the first and the second weight members for receiving and engaging with the first and the second arms respectively.

7. An adjustable dumbbell as claimed in claim 6, wherein the compartments of each of the first and the second weight members are communicating with each other at a middle opening, the first and the second arms each include a first end portion connected to the first and the second spring biased catches, and a second end portion engaged in the opening of each of the first and the second weight members.

8. An adjustable dumbbell as claimed in claim 1, wherein the receptacle includes a second passage formed in the receptacle, the carrier includes a second pole extended from the carrier and extendible upwardly through the second passage of the receptacle, the second housing includes a chamber formed in the second housing, and a protrusion extended into the chamber of the second housing, the first dumbbell includes a third weight member supported on the receptacle and engageable into the chamber of the second housing, the third weight member includes a space formed in the third weight member for receiving and engaging with the protrusion of the second housing, two grooves being formed in the third weight member and communicating with the space of the third weight member, two third spring biased catches slidably engaged in the grooves of the third weight member and either extendible into the space of the third weight member or engageable in the grooves of the third weight member, two third arms are engaged in the third weight member and coupled to the third spring biased catches for moving the third spring biased catches into and out of the space of the third weight member.

9. An adjustable dumbbell as claimed in claim 8, wherein the carrier includes a second stud extended from the carrier and extendible upwardly through the second passage of the receptacle, the first dumbbell includes a fourth weight member supported on the receptacle and engageable into the chamber of the second housing, the fourth weight member includes a space formed in the fourth weight member for receiving and engaging with the protrusion of the second housing, two grooves are formed in the fourth weight member and communicating with the space of the fourth weight member, two fourth spring biased catches slidably engaged in the grooves of the fourth weight member and either extendible into the space of the fourth weight member or engageable in the grooves of the fourth weight member, two fourth arms are engaged in the fourth weight member and coupled to the fourth spring biased catches for moving the fourth spring biased catches into and out of the space of the fourth weight member 10. An adjustable dumbbell as claimed in claim I further comprising a second dumbbell including a third weight ring and a fourth weight ring supported on the receptacle, the receptacle including a third passage formed in the receptacle, a second handle mechanism including a handle bar having a third housing and a fourth housing to be coupled to the third and the fourth weight rings selectively, the third and the fourth housings each including a chamber formed in the third and the fourth housings respectively, and a protrusion extended into the chamber of each of the third and the fourth housings respectively, a first' weight element supported on the receptacle and engageable into the chamber of the third housing, the first weight element including a space formed in the first weight element for receiving and engaging with the protrusion of the third housing, two grooves being formed in the first weight element and communicating with the space of the first weight element, two fifth spring biased catches slidably engaged in the grooves of the first weight element and either extendible into the space of the first weight element or engageable in the grooves of the first weight element, two fifth arms being engaged in the first weight element and coupled to the fifth spring biased catches for moving the fifth spring biased catches into and out of the space of the first weight element, the carrier including a third pole extended from the carrier and extendible upwardly through the third passage of the receptacle for engaging with the fifth arms.

11. An adjustable dumbbell as claimed in claim 10, wherein a second weight element is supported on the receptacle and engageable into the chamber of the third housing, the second weight element includes a space formed in the second weight element for receiving and engaging with the protrusion of the third housing, two grooves being formed in the second weight element and communicating with the space of the second weight element, two sixth spring biased catches slidably engaged in the grooves of the second weight element and either extendible into the space of the second weight element or engageable in the grooves of the second weight element, two sixth arms are engaged in the second weight element and coupled to the sixth spring biased catches for moving the sixth spring biased catches into and out of the space of the second weight element, the carrier includes a third stud extended from the carrier and extendible upwardly through the third passage of the receptacle for engaging with the sixth arms respectively, the third pole is higher than the third stud.

12. An adjustable dumbbell as claimed in claim 10, wherein the receptacle includes a fourth passage formed in the receptacle, the carrier includes a fourth pole extended from the carrier and extendible upwardly through the fourth passage of the receptacle, the second dumbbell includes a third weight element supported on the receptacle and engageable into the chamber of the fourth housing, the third weight element includes a space formed in the third weight element for receiving and engaging with the protrusion of the fourth housing, two grooves being formed in the third weight element and communicating with the space of the third weight element, two seventh spring biased catches slidably engaged in the grooves of the third weight element and either extendible into the space of the third weight element or engageable in the grooves of the third weight element, two seventh arms are engaged in the third weight element and coupled to the seventh spring biased catches for moving the seventh spring biased catches into and out of the space of the third weight element.

13. An adjustable dumbbell as claimed in claim 12, wherein the second dumbbell includes a fourth weight element supported on the receptacle and engageable into the chamber of the fourth housing, the fourth weight element includes a space formed in the fourth weight element for receiving and engaging with the protrusion of the fourth housing, two grooves are formed in the fourth weight element and communicating with the space of the fourth weight element, two eighth spring biased catches are slidably engaged in the grooves of the fourth weight element and either extendible into the space of the fourth weight element or engageable in the grooves of the fourth weight element, two eighth arms are engaged in the fourth weight element and coupled to the eighth spring biased catches for moving the eighth spring biased catches into and out of the space of the fourth weight element.

14. An adjustable dumbbell as claimed in claim 13, wherein the carrier includes a fourth stud extended from the carrier and extendible upwardly through the fourth passage of the receptacle, the fourth stud is provided for engaging with the eighth arms, the fourth pole is higher than the fourth stud.

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