Status visual dumbbell

Abstract

The utility model discloses a state visual dumbbell, including the center tube group of axis opposite telescopic and the handle of movable sleeve setting in the center tube group outside, and the telescopic of center tube group is realized to the control of handle, and the center tube group is equipped with self -locking block, and the self -locking block can be relative to center tube group surface radial telescopic, and button assembly is connected with display mechanism, and the content of its display is associated with the telescopic state of self -locking block, button assembly is connected with self -locking block and display mechanism transmission simultaneously, and the synchronous change of display mechanism display content is realized to the radial telescopic of drive self -locking block of control button assembly simultaneously, and the telescopic state of self -locking block corresponds the axial locking or unlocking of center tube group and disc piece, and then the locking state of user more intuitive, more real -time confirmation dumbbell current and disc piece has been realized, and the security hidden danger that leads to because of locking state is not clear has been effectively avoided.

Description

Technical Field

[0001] This utility model relates to the field of fitness equipment, specifically to a status-visual dumbbell. Background Technology

[0002] In the field of fitness equipment, adjustable dumbbells are widely popular due to their flexibility. A representative example of existing adjustable dumbbells is a novel adjustable dumbbell disclosed in Chinese Patent Publication No. CN212347552U, which includes a dumbbell assembly, a dumbbell seat, and multiple dumbbell plates, and achieves weight adjustment through the cooperation of a handle assembly, a tailstock assembly, and a sliding component.

[0003] The existing technology also uses weight scales engraved on the outside of the handle tube and an indicator groove on the front cover of the tailstock to align the scales and indicate the weight of the dumbbell after adjustment. However, this display mechanism is only limited to weight scale alignment. The display of the weight scale is fixed as the angle of the handle is fixed, and it cannot intuitively show the locked state of the dumbbell. Users cannot intuitively confirm whether the dumbbell has been reliably locked during use. Especially after adjusting the weight, if the locking state is misjudged, safety risks such as the dumbbell plates accidentally falling off may occur, reducing the safety of the dumbbell. Utility Model Content

[0004] The purpose of this utility model is to provide a technical solution for a state-visual dumbbell to address the shortcomings of existing technologies. By setting a control connection between the button assembly and the display mechanism, while the button assembly drives the self-locking block to extend and retract radially to lock or unlock the disc, the locking status associated with the current state of the self-locking block can be directly displayed. This makes it easier to confirm the locking status of the dumbbell more intuitively and in real time, effectively avoiding safety hazards caused by unclear locking status.

[0005] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0006] A state-visual dumbbell includes a central tube assembly that can extend and retract relative to the axis and a handle movably sleeved outside the central tube assembly. The handle has end pivot structures at both ends, and is rotatably positioned between the end pivot structures. Rotating the handle controls the extension and retraction of the central tube assembly. The central tube assembly has a self-locking block that can extend and retract radially relative to the surface of the central tube assembly. The self-locking block is connected to a button assembly for driving its radial extension and retraction. The button assembly is connected to a display mechanism, and the content displayed is related to the extension and retraction state of the self-locking block. The button assembly is simultaneously connected to both the self-locking block and the display mechanism, and operating the button assembly enables the self-locking block to extend and retract radially while the content displayed by the display mechanism changes synchronously.

[0007] By adopting the above technical solution, the relative extension and retraction of the central tube assembly along its axis is used to synchronously increase or decrease the number of plates on both sides, thereby quickly adjusting the weight of the dumbbell. The rotation of the handle controls the extension and retraction of the central tube assembly. The self-locking block set on the central tube assembly extends and retracts radially relative to the surface of the central tube assembly. The radially extending self-locking block can cooperate with the plates to achieve axial locking or unlocking of the central tube assembly and the plates. The button assembly is simultaneously connected to the self-locking block and the display mechanism. Controlling the movement of the button assembly can drive the self-locking block to extend and retract radially relative to the surface of the central tube assembly. At the same time, the button assembly will drive the display mechanism to change the displayed content. The content displayed by the display mechanism is related to the extension and retraction state of the self-locking block. The extension and retraction state of the self-locking block corresponds to the axial locking or unlocking of the central tube assembly and the plates, thus enabling users to more intuitively and in real time confirm the current locking status of the dumbbell and the plates, effectively avoiding safety hazards caused by unclear locking status.

[0008] Furthermore, the display mechanism includes a swing block located within the end pivot structure. The swing block is connected to the button assembly for control, and the reciprocating motion of the button assembly can drive the swing block to swing back and forth accordingly. Each stable swing position of the swing block is associated with the extension and retraction state of the self-locking block.

[0009] Furthermore, the end pivot structure is provided with an arc-shaped groove, and the swing block is movably disposed in the arc-shaped groove. The swing block can swing back and forth along the groove direction of the arc-shaped groove. The swing block is hinged to the button assembly and can swing back and forth with the reciprocating motion of the button assembly.

[0010] Furthermore, the display mechanism includes an observation window, which is opened on the surface of the end pivot structure; the swing block is provided with at least two status information marks, and the size of the observation window corresponds to the status information marks. Whenever the swing block swings to any stable swing position, the observation window can only expose the corresponding status information mark, and the other status information marks are covered by the surface of the end pivot structure.

[0011] Furthermore, the self-locking block is equipped with an unlocking slide handle, which is connected to a button assembly for control. The button assembly can control the unlocking slide handle to make axial displacement. A locking swing arm mechanism is connected between the unlocking slide handle and the self-locking block. The locking swing arm mechanism is connected in transmission between the unlocking slide handle and the self-locking block. The button assembly drives the unlocking slide handle to move, which can drive the locking swing arm mechanism to make mechanical movement, thereby driving the self-locking block to achieve radial extension and retraction through the locking swing arm mechanism.

[0012] Furthermore, the self-locking block is at least a pair of radially opposed self-locking blocks. The locking swing arm mechanism includes a first swing arm and a second swing arm. The ends of the first swing arm and the second swing arm that are far apart from each other are respectively hinged to the two self-locking blocks. The other ends of the first swing arm and the second swing arm are hinged to the unlocking slide handle. The axial displacement of the unlocking slide handle can drive the first swing arm and the second swing arm to swing between the collinear dead point position and the parallel position. When the first swing arm and the second swing arm swing to the collinear dead point position, the axis of the two swing arms is collinear with the radial extension and retraction direction of the two self-locking blocks. In this state, the self-locking block extends out of the surface of the central tube group and the self-locking block will not be squeezed from the outside to cause it to retract.

[0013] Furthermore, the unlocking slide handle is provided with a guide pin, and one end of the unlocking slide handle is provided with a vertical guide groove through which the guide pin moves. The unlocking slide handle is provided with an independent oblique guide groove, which is opened in the central tube assembly, and the guide pin moves through the oblique guide groove. The button assembly is provided with a linkage arm, which is connected between the button assembly and the guide pin. The linkage arm is used to transmit the driving force of the button assembly to the guide pin.

[0014] Furthermore, the central tube assembly includes two shaft tubes with their axes arranged collinearly, and each shaft tube is provided with a sliding key. The inclination angles of the two sliding keys are mirror-symmetrical. The handle is formed with staggered double threads, which mesh with the two sliding keys respectively.

[0015] Furthermore, the end pivot structure is provided with a locking disc that rotates coaxially with the handle. The locking disc has at least one locking groove in the circumferential direction. The button assembly is fixedly connected with a locking pin. During the reciprocating motion of the button assembly, the locking pin can engage with the locking groove. The locking pin engaging with the locking groove can limit the rotation of the locking disc.

[0016] Furthermore, it includes a disc movably connected to the central tube assembly. The disc has an axially formed assembly hole that corresponds to the central tube assembly for insertion. The inner wall of the assembly hole has an inner groove that corresponds to the self-locking block. The inner groove can cooperate with the self-locking block in the extended state to achieve axial positioning of the central tube assembly and the disc.

[0017] This utility model, by adopting the above-mentioned technical solution, has the following beneficial effects:

[0018] 1. This utility model controls the movement of the button assembly to drive the self-locking block to radially extend and retract relative to the surface of the central tube assembly. At the same time, the button assembly drives the display mechanism to change the displayed content. Thus, while the button assembly drives the self-locking block to radially extend and retract to lock or unlock the disc, it can directly display the locking status associated with the current state of the self-locking block, making it easier to confirm the locking status of the dumbbell more intuitively and in real time, and effectively avoiding safety hazards caused by unclear locking status.

[0019] 2. This utility model axially locks the central tube assembly while it loads the discs, replacing the existing tailstock assembly and disc assembly matching method. It can increase the number of discs that can be loaded by extending the length of the central tube assembly, or increase the total weight of the dumbbell by replacing it with a standard disc with a larger diameter and higher density, thus improving the flexibility of expansion.

[0020] 3. This utility model achieves radial extension and retraction by driving the self-locking block through the locking swing arm mechanism. When the two swing arms of the locking swing arm mechanism swing to the collinear dead point position, the mechanism enters a self-stabilizing state. No continuous driving force such as springs or electromagnets is required to maintain the lock. The axes of the two swing arms are collinear with the radial extension and retraction direction of the two self-locking blocks. The self-locking blocks will not be driven inward even when radially squeezed from the outside to the inside. It has excellent anti-interference and locking reliability. Attached image description:

[0021] The present invention will be further described below with reference to the accompanying drawings:

[0022] Figure 1 This is a schematic diagram of the structure of the grip and end pivot of this utility model.

[0023] Figure 2 This is a schematic diagram of the end pivot structure of this utility model;

[0024] Figure 3 This is a structural diagram of the disassembled one-side pivot structure of this utility model;

[0025] Figure 4 This is a schematic diagram of the structure of the end pivot front cover of this utility model;

[0026] Figure 5 This is a schematic diagram of the button assembly of this utility model;

[0027] Figure 6 This is a structural diagram of the disassembled grip and end pivot structure of this utility model;

[0028] Figure 7 This is a schematic diagram of the structure of the central tube assembly of this utility model;

[0029] Figure 8 This is a cross-sectional structural diagram of the central tube assembly of this utility model;

[0030] Figure 9 This is a schematic diagram of the central tube assembly structure after the shaft tube of this utility model has been disassembled;

[0031] Figure 10 This is a schematic diagram of the structure of the shaft tube of this utility model;

[0032] Figure 11 This is a schematic diagram of the unlocking slider of this utility model;

[0033] Figure 12 This is a structural diagram of the unlocking slide handle with the inner tube of the shaft in the present invention.

[0034] Figure 13 This is a schematic diagram of the structure of the locking swing arm mechanism of this utility model in one state;

[0035] Figure 14 This is a schematic diagram of the structure of the locking swing arm mechanism of this utility model in one state;

[0036] Figure 15 This is a schematic diagram of the structure of the self-locking block of this utility model;

[0037] Figure 16 This is a cross-sectional structural diagram of the grip of this utility model;

[0038] Figure 17 This is a schematic diagram of the structure of the disk of this utility model;

[0039] Figure 18 This is a schematic diagram of the structure of the base of this utility model;

[0040] Figure 19 This is a structural schematic diagram of the dumbbell set of this utility model;

[0041] Figure 20 This is a schematic diagram of the inner structure of the end pivot front cover of this utility model from the front view.

[0042] In the diagram: 1-Central tube assembly; 11-Shaft tube; 111-First shaft tube; 112-Second shaft tube; 12-Sliding keyway; 13-Sliding key; 131-Inner shaft tube; 2-Self-locking block; 21-Locking block through hole; 22-Linkage swing arm;

[0043] 3-Unlocking slide handle; 31-Guide pin; 32-Vertical guide groove; 321-Floating seat; 33-Angled guide groove; 34-First return spring; 35-Locking swing arm mechanism; 36-First swing arm; 37-Second swing arm; 38-Swing arm seat; 4-Linkage arm; 43-Transverse slide groove; 5-Button assembly; 51-Top contact; 53-Linkage arm mounting seat; 54-Second return spring; 55-Guide rib;

[0044] 6-End pivot structure; 61-Junior journal; 62-Observation window; 63-Swing block; 64-Drive guide post; 65-Arc groove; 66-End pivot front cover; 67-End pivot rear cover;

[0045] 7-Grip; 71-Sleeve; 72-Locking disc; 73-Locking groove; 74-Locking pin; 75-Thread;

[0046] 8-Disc; 81-Assembly hole; 82-Inner groove; 9-Placement base; 91-Top rod; 92-Disc slot. Detailed Implementation

[0047] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0048] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the protection scope of the present invention.

[0049] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this utility model are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion.

[0050] Example 1

[0051] A state-visual dumbbell includes a central tube assembly 1 that is relatively telescopic along its axis and a handle 7 that is movably sleeved outside the central tube assembly 1. The handle 7 has end pivot structures 6 at both ends, such as... Figure 1 As shown; the handle 7 is rotatably located between the two pivot structures 6. Rotating the handle 7 can control the extension and retraction of the central tube assembly 1.

[0052] The central tube assembly 1 is equipped with a self-locking block 2, which can radially extend and retract relative to the surface of the central tube assembly 1, such as... Figure 7 As shown; the self-locking block 2 is connected to a button assembly 5 for driving it to achieve radial extension and retraction.

[0053] The button assembly 5 is connected to a display mechanism; in this embodiment, the display mechanism is located on the end pivot structure 6, and the content displayed is related to the extension and retraction state of the self-locking block 2.

[0054] Specifically, the self-locking block 2 extends radially to the central tube assembly 1, and its radial extension to the surface of the central tube assembly 1 can lock axially with the disc 8, that is, the dumbbell and the disc 8 are locked together; when the self-locking block 2 retracts radially into the surface of the central tube assembly 1, it releases the axial lock with the disc 8, that is, the dumbbell and the disc 8 are unlocked.

[0055] In this embodiment, the display mechanism shows two states: "locked" and "unlocked," corresponding to the locking and unlocking of the dumbbell and disc 8.

[0056] The button assembly 5 is connected to both the self-locking block 2 and the display mechanism. The control button assembly 5 can drive the self-locking block 2 to extend and retract radially while simultaneously changing the content displayed by the display mechanism.

[0057] The end pivot structure 6 consists of an end pivot front cover 66 and an end pivot rear cover 67, as follows: Figure 3 As shown;

[0058] The end pivot structure 6 is rotatably connected to the handle 7, and the handle 7 has bushings 71 formed at both ends, such as... Figure 3 As shown;

[0059] The connection between the end pivot structure 6 and the handle 7 is provided with a journal 61 that cooperates with the bushing 71 to achieve a stable connection, such as... Figure 2 As shown, journal 61 is formed on one side of end pivot front cover 66;

[0060] When the grip 7 is rotatably connected between the two pivot structures 6, the journal 61 is inserted into and nested in the bushing 71, with a clearance fit between the two; the journal 61 and the bushing 71 can jointly bear the radial load, improving the connection stability between the grip 7 and the end pivot structure 6.

[0061] The central tube assembly 1 includes two collinear shaft tubes 11 that are capable of relative displacement;

[0062] The end pivot structure 6 is located between the handle 7 and the disc 8. The two shaft tubes 11 extend to both ends as the handle 7 rotates, thus engaging with the disc 8 for mounting. The shaft tubes 11 movably pass through the end pivot structure 6, as... Figure 1 As shown.

[0063] The button assembly 5 is located within the end pivot structure 6, and it is capable of radial reciprocating motion within the end pivot structure 6;

[0064] Furthermore, the end pivot structure 6 includes a front end pivot cover 66 and a rear end pivot cover 67, such as... Figure 3 As shown, after the front cover 66 and the rear cover 67 of the end pivot are closed, a cavity space is formed between them, and the button assembly 5 is movably disposed in this cavity space.

[0065] In this embodiment, a guide rib 55 is provided on the inner side wall of the end pivot rear cover 67, such as... Figure 2 , Figure 6 As shown;

[0066] Two guide ribs 55 are symmetrically arranged on the left and right sides, forming a guide rail structure in the cavity space of the end pivot structure 6 that just accommodates the button assembly 5 and restricts its movement trajectory. The button assembly 5 can only make radial reciprocating movements along the range of the guide rail.

[0067] The bottom of the button assembly 5 has a top contact 51, such as Figure 5 As shown;

[0068] The bottom of the end pivot structure 6 has an operation window for operating the button assembly 5. The position and size of the operation window correspond to the top contact 51, such as... Figure 1 As shown;

[0069] Users can touch the top contact 51 through the operation window to push the button assembly 5 upward.

[0070] When the button assembly 5 is pushed upward, it can cause the self-locking block 2 to retract into the shaft tube 11 to unlock the dumbbell and the disc 8; conversely, when the button assembly 5 is dropped, the self-locking block 2 extends radially out of the surface of the shaft tube 11 to lock the dumbbell and the disc 8.

[0071] The display mechanism includes a rocker block 63, which is located within the end pivot structure 6. The rocker block 63 is connected to the button assembly 5 for control purposes. Figure 20 As shown;

[0072] An observation window 62 is provided on the surface of the end pivot structure 6, such as Figure 2 As shown;

[0073] In this embodiment, the upper edge of the pendulum block 63 is an arc-shaped upper edge, and its arc-shaped upper edge surface is provided with two status information indicators, namely "locked" and "unlocked". The size of the observation window 62 corresponds to these two status information indicators respectively. Whenever the pendulum block 63 swings to any stable swing position, the observation window 62 can only expose the corresponding status information indicator, and the other status information indicators are obscured by the surface of the end pivot structure 6. In short, when the pendulum block 63 swings to one side to a stable position, the observation window 62 will only display "locked", and when the pendulum block 63 swings to another stable position, the observation window 62 will only display "unlocked".

[0074] The inner wall of the end pivot front cover 66, corresponding to the position of the observation window 62, has an arc-shaped groove 65, such as... Figure 4 , Figure 20 As shown;

[0075] In this embodiment, the shape of the arc groove 65 is adapted to the arc-shaped upper edge of the swing block 63, and the shape of the arc groove 65 limits the swing block 63 to swing only along the arc trajectory.

[0076] Furthermore, the status information identifier is located on the upper arc-shaped surface of the pendulum block 63;

[0077] The oscillating block 63 is connected to the button assembly 5 for control. Specifically, a drive guide post 64 is formed at the end of the button assembly 5 near the oscillating block 63, such as... Figure 3 As shown, the drive guide post 64 is cylindrical;

[0078] The axial direction of the swing block 63 has an elongated oval groove, such as... Figure 6 , Figure 20 As shown;

[0079] The drive guide post 64 is inserted into the elongated oval slot, and the elongated oval slot has a certain length so that the drive guide post 64 can slide within the slot.

[0080] When the button assembly 5 reciprocates radially, the drive guide post 64 slides in the elongated slot, thereby converting the linear motion of the button assembly 5 into the left and right swing of the swing block 63. The length of the slot allows the drive guide post 64 to generate the necessary displacement during the motion. The arc-shaped trajectory of the arc-shaped slot 65 is used to limit the swing of the swing block 63.

[0081] In actual operation, pushing the button assembly 5 upwards causes the radial linear motion of the button assembly 5 to be converted into the left and right swing of the swing block 63. When the swing block 63 swings to one side until it stabilizes, the status information label with the word "unlocked" on the upper arc surface of the swing block 63 is displayed through the observation window 62. When the button assembly 5 falls down, the swing block 63 swings to the other side until it stabilizes, and the status information label with the word "locked" on the upper arc surface of the swing block 63 is displayed through the observation window 62.

[0082] The radial movement of the control button assembly 5 can drive the self-locking block 2 to extend and retract radially relative to the surface of the central tube assembly 1. At the same time, it will drive the display mechanism to switch between the display of the two status information indicators of "unlocked" and "locked". That is, the locking and unlocking status of the dumbbell and disc 8 can be displayed more intuitively and in real time by the display mechanism, effectively avoiding safety hazards caused by unclear locking status.

[0083] In this embodiment, the central tube assembly 1 includes two axially collinear shaft tubes 11, namely a first shaft tube 111 and a second shaft tube 112, as shown below. Figure 7 As shown; the two shaft tubes 11 are provided with variable stroke for axial relative displacement, that is, the first shaft tube 111 and the second shaft tube 112 can achieve bidirectional synchronous expansion and contraction on the axis.

[0084] An inner tube 131 is fitted inside the shaft tube 11, and a sliding key 13 is formed on the surface of the inner tube 131, such as... Figure 9 , Figure 12 As shown;

[0085] The surface of the shaft tube 11 is provided with a sliding keyway 12 corresponding to the sliding key 13, such as Figure 10 As shown;

[0086] The two are in the following state: the inner tube 131 is fitted inside the tube 11, and the sliding key 13 extends radially from the sliding keyway 12.

[0087] In this embodiment, the inner tube 131 is inside the shaft tube 11, and the two are press-fitted together. The inner tube 131 and the shaft tube 11 move axially synchronously.

[0088] Since the sliding key 13 extends radially from the sliding keyway 12, the limiting of the two further enables the inner tube 131 and the shaft tube 11 to move axially synchronously.

[0089] In this embodiment, the sliding key 13 is integrally formed with the inner tube 131.

[0090] The handle 7 can rotate relative to the end pivot structures 6 at both ends, that is, the end pivot structures 6 at both ends enable the handle 7 to rotate independently.

[0091] The two rotation directions of the handle 7 control the extension and retraction of the two shaft tubes 11, respectively;

[0092] Furthermore, the grip 7 has interlaced double-threaded threads 75 that mesh with the two sliding keys 13 respectively. The threads 75 are evenly distributed within the grip 7, such as... Figure 16 As shown;

[0093] By engaging the thread 75 with the sliding key 13, rotating the handle 7 in one clockwise direction controls the two shaft tubes 11 to extend synchronously to both ends; rotating the handle 7 in the other clockwise direction controls the two shaft tubes 11 to retract synchronously inward.

[0094] In this embodiment, the self-locking block 2 is a pair of radially opposed self-locking blocks 2, such as Figure 8 As shown;

[0095] The surface of the shaft tube 11 is symmetrically provided with locking block through holes 21, such as Figure 10 As shown;

[0096] The self-locking block 2 is movably embedded in the surface of the shaft tube 11, that is, the self-locking block 2 can extend out of the surface of the shaft tube 11 through the locking block through hole 21, or it can be retracted into the shaft tube 11.

[0097] When the first shaft tube 111 and the second shaft tube 112 extend out, they are each mounted with the same number of discs 8 at both ends. The self-locking block 2 is located at the ends of the two shaft tubes 11 that are far apart from each other. The self-locking block 2 located at the outermost end of the shaft tube 11 will cooperate with the outermost disc 8 on the shaft 11 to achieve axial limiting. Since the self-locking block 2 is located at the outermost end of the shaft tube 11, it axially locks with the outermost disc 8, and at the same time, it also axially locks all the discs 8 between the outermost disc 8 and the end pivot structure 6.

[0098] The self-locking block 2 works in conjunction with the disc 8 to achieve axial locking. Compared with existing dumbbells with quick weight adjustment, the requirements for the disc 8 are lower, allowing the use of standard, unnotch-free discs 8, ensuring that the center of mass of the disc 8 is located at the center of the disc 8. At the same time, the design of the self-locking block 2 replaces the tailstock assembly, so the maximum adjustable weight of the dumbbell is no longer limited by the mechanical structure of the tailstock space. The weight of the dumbbell can be expanded simply by replacing the disc 8 on the shaft tube 11 with a larger and heavier one, or by increasing the telescopic length of the shaft tube 11. This design and upgrade are more flexible.

[0099] The self-locking block 2 is equipped with an unlocking slide 3, which is connected to the button assembly 5 for control.

[0100] The button assembly 5 can control the axial displacement of the unlocking slide 3. A locking swing arm mechanism 35 is connected between the unlocking slide 3 and the self-locking block 2. The locking swing arm mechanism is connected in transmission between the unlocking slide 3 and the self-locking block 2. The button assembly 5 drives the unlocking slide 3 to move, which can drive the locking swing arm mechanism 35 to make mechanical movements, and then drive the self-locking block 2 to achieve radial extension and retraction through the locking swing arm mechanism 35.

[0101] The locking arm mechanism 35 includes a first swing arm 36 and a second swing arm 37. The ends of the first swing arm 36 and the second swing arm 37, which are far apart from each other, are respectively hinged to two self-locking blocks 2. The other ends of the first swing arm 36 and the second swing arm 37 are hinged to the unlocking slide handle 3. Figure 12 As shown;

[0102] Furthermore, the end of the unlocking slider 3 is provided with a swing arm seat 38, and the ends of the two swing arms are hinged to the unlocking slider 3 through the swing arm seat 38, such as... Figure 11 As shown;

[0103] An inner tube 131 is fitted inside the shaft tube 11, and the unlocking handle 3 is axially slidably fitted inside the inner tube 131. Figure 12 As shown;

[0104] The self-locking block 2 extends to one side of the inner tube 131, forming a linkage swing arm 22. The self-locking block 2 is hinged to the inner tube 131 via the linkage swing arm 22. Figure 12 As shown;

[0105] Through the cooperation of the locking swing arm mechanism 35, the unlocking slide handle 3, and the self-locking block 2, the axial reciprocating sliding of the unlocking slide handle 3 realizes the control of the extension and retraction of the self-locking block 2. Its specific working principle is as follows:

[0106] The first swing arm 36 and the second swing arm 37 are hinged to the self-locking block 2, converting their own swing into the radial displacement of the self-locking block 2; the first swing arm 36 and the second swing arm 37 are hinged to the unlocking slide 3 through the swing arm seat 38, converting the axial movement of the unlocking slide 3 into the swinging movement of the two swing arms; the hinge between the self-locking block 2 and the inner tube 131 restricts the self-locking block 2 to move only within this stroke range;

[0107] The axial reciprocating motion of the unlocking slider 3 can drive the first swing arm 36 and the second swing arm 37 to swing, causing the first swing arm 36 and the second swing arm 37 to swing between the collinear dead point position and the parallel position, such as Figure 13 , Figure 14 As shown, this causes the self-locking block 2 to reciprocate radially; when the first swing arm 36 and the second swing arm 37 swing to the collinear dead point position under the push of the unlocking slider 3, as shown... Figure 13 As shown, at this time, the self-locking block 2 is fully extended from the surface of the shaft tube 11. In this state, the axes of the two swing arms are collinear with the radial extension and retraction direction of the two self-locking blocks 2. The shaft 11 can be axially locked with the disc 8 and the self-locking block 2 will not be squeezed from the outside and retracted.

[0108] The first swing arm 36 and the second swing arm 37 move to the point where... Figure 13 When the collinear dead point position is shown, the self-locking block 2, which is pushed out of the surface of the shaft tube 11 by the two swing arms, is a geometric locking solution. Compared with existing technologies that require continuous driving force to maintain the locking state, such as locking by spring force or electric drive, the external compressive force applied to the self-locking block 2 will be transmitted along the axis of the swing arm and cannot generate an effective torque to rotate the two swing arms. That is, the locking swing arm mechanism 35 provides a geometric locking solution. Once the two swing arms form a collinear dead point position, the mechanism enters a self-stabilizing state and does not require any continuous driving force such as springs or electromagnets to maintain the lock. This eliminates the possibility of accidental unlocking due to power failure, external vibration or accidental contact from a physical principle. The self-locking block 2 is locked by the two swing arms at the collinear dead point position. Even if the self-locking block 2 is squeezed from the outside to the inside, it will not be driven inward, which has excellent anti-interference and locking reliability.

[0109] The self-locking block 2, which is locked by the collinear dead point position of the first swing arm 36 and the second swing arm 37 and extends out of the shaft tube 11, can only be actively broken by the axial sliding of the unlocking handle 3, causing the two swing arms to swing towards a position approaching parallel. Figure 14 As shown, by releasing the collinear dead point position of the two swing arms, the self-locking block 2 will be driven to retract radially into the shaft tube 11, and the shaft tube 11 and the disc 8 will be axially unlocked.

[0110] The button assembly 5 is provided with a linkage arm 4, which is used to drive the button assembly 5 and the unlocking slider 3.

[0111] In this embodiment, the linkage arm 4 is a long strip structure that connects to both button assemblies 5 simultaneously, such as... Figure 6 , Figure 7 As shown;

[0112] The two button assemblies 5 are respectively connected to the left and right ends of the same linkage arm 4. Only when the two button assemblies 5 move upward at the same time can the linkage arm 4 be effectively controlled to move upward accordingly.

[0113] Located above the top contact 51, the button assembly 5 has a linkage arm mounting base 53, such as Figure 5 As shown;

[0114] In this embodiment, the linkage arm mounting base 53 is a slot structure that mates with the linkage arm 4, such as... Figure 5 As shown; the linkage arm mounting base 53 is interference-fitted with the linkage arm 4.

[0115] The linkage arm 4 moves upward in sync with the button assemblies 5 at both ends, and this action can drive the unlocking slider 3 to slide axially.

[0116] The specific cooperation between the linkage arm 4 and the unlocking slider 3 is as follows:

[0117] The unlocking slider 3 is provided with a vertical guide groove 32, and a guide pin 31 moves horizontally through the vertical guide groove 32, such as... Figure 11 As shown;

[0118] Specifically, the end of the unlocking slider 3 furthest from the swing arm seat 38 is provided with a floating seat 321, such as... Figure 11 As shown, the floating seat 321 is fixedly connected to the end of the unlocking slide handle 3, and the vertical guide groove 32 is opened through the floating seat 321;

[0119] The floating seat 321 is slidably connected to the inner tube 131 of the shaft along with the unlocking slide handle 3. The inner tube 131 of the shaft is fixedly sleeved inside the shaft tube 11. Figure 9 As shown;

[0120] A transversely through-hole oblique guide groove 33 is provided on the shaft tube 11 and the inner shaft tube 131, such as... Figure 9 , Figure 12 As shown;

[0121] The inner tube 131 and the tube 11 are fixed in position, and the two are respectively opened with a through inclined guide groove 33 so that the guide pin 31 can pass through from both sides of the tube 11.

[0122] The vertical guide groove 32 corresponds to the inclined guide groove 33. The guide pin 31 passes through the vertical guide groove 32 and can slide along its slot direction; the guide pin 31 passes through the inclined guide groove 33 and can slide along its slot direction; the guide pin 31 is simultaneously moved through both guide groove structures. By applying an upward driving force to the guide pin 31, the guide pin 31 will slide obliquely upward along the inclined guide groove 33, as... Figure 9 As shown, the guide pin 31 sliding obliquely upward should cause the unlocking slide handle 3 to slide obliquely upward towards the far end of the locking arm mechanism 35. However, the unlocking slide handle 3 is limited by the inner tube 131 and can only slide axially within it. The vertical guide groove 32 provides longitudinal sliding space for the guide pin 31, releasing the longitudinal constraint of the guide pin 31. That is, the guide pin 31 still slides obliquely upward, but its longitudinal traction force will not be transmitted to the unlocking slide handle 3. Instead, it is "gone" through the vertical guide groove 32. In this way, the external force drives the guide pin 31 to slide obliquely upward, which in turn causes the unlocking slide handle 3 to slide away from the self-locking block 2. Conversely, the guide pin 31 slides obliquely downward, causing the unlocking slide handle 3 to slide towards the end closer to the self-locking block 2.

[0123] In this embodiment, the unlocking slider 3 is equipped with a first return spring 34, such as Figure 11 , Figure 12 As shown;

[0124] The first return spring 34 is sleeved on the unlocking slider 3, and one end of it is fixedly connected to the rocker arm seat 38, such as Figure 11 , Figure 12 As shown;

[0125] The other end of the first return spring 34 abuts against the inner tube 131 of the shaft, such as Figure 12 As shown;

[0126] When the unlocking slider 3 is pulled by the guide pin 31 to slide away from the self-locking block 2, the first return spring 34 between the swing arm seat 38 and the inner tube 131 of the shaft will be compressed and accumulate potential energy. When the guide pin 31 loses the continuous upward driving force, the first return spring 34 will rebound to push the swing arm seat 38, so that the unlocking slider 3 slides back towards the end closer to the self-locking block 2. That is, after the first return spring 34 rebounds, it will reset the unlocking slider 3 to the state where the self-locking block 2 extends out of the shaft tube 11, and the two swing arms will be reset to the collinear dead point position.

[0127] The guide pin 31 extends laterally through the inclined guide groove 33, and its two ends extend from both sides of the shaft tube 11 to connect with the linkage arm 4. In this embodiment, the linkage arm 4 is provided on both sides of the shaft tube 11.

[0128] By simultaneously driving the guide pin 31 through the linkage arms 4 on both sides, the stability of the guide pin 31's movement can be improved.

[0129] Each side of the linkage arm 4 is a long strip structure that can connect to the button assemblies 5 at both ends at the same time. Thus, it can be seen that each side of the linkage arm 4 can also be connected to the guide pin 31 set on the first shaft tube 111 and the second shaft tube 112 at the same time.

[0130] Thus, when the button assemblies 5 at both ends move upward simultaneously, they will drive the linkage arms 4 located on both sides of the two shaft tubes 11 to lift upward. The synchronous upward lifting of the linkage arms 4 on both sides can stably control the guide pin 31 to move obliquely upward, and then the guide pin 31 pulls the unlocking slide handle 3 to slide axially away from the self-locking block 2, thereby realizing the control and unlocking of the locking swing arm mechanism 35.

[0131] In this embodiment, the linkage arm 4 is provided with a horizontal translation groove 43, such as... Figure 7 As shown;

[0132] The length of the translation slide 43 is adapted to the displacement stroke length of the shaft tube 11. The guide pin 31 is movably connected in the translation slide 43 and can be displaced along the slot direction of the translation slide 43.

[0133] The guide pin 31 will translate as the shaft tube 11 extends and retracts, so it cannot be fixedly connected to the linkage arm 4. A translational groove 43 adapted to the displacement stroke length of the shaft tube 11 is opened on the linkage arm 4. When the linkage arm 4 is connected to the guide pin 31, the guide pin 31 can translate as the shaft tube 11, ensuring that the extension and retraction of the shaft tube 11 is not constrained by the guide pin 31 and the linkage arm 4.

[0134] In this embodiment, the button assembly 5 is provided with a second reset spring 54;

[0135] Furthermore, a mounting groove for accommodating the second return spring 54 is provided on one side of the button assembly 5. The bottom of the mounting groove is a boss. The second return spring 54 is placed in the mounting groove, and the bottom end of the second return spring 54 abuts against the boss. Figure 3 , Figure 20 As shown;

[0136] The other end of the second return spring 54 can abut against the surface of the shaft tube 11 and compress the second return spring 54 as the button assembly 5 moves upward. When the user controls the button assembly 5 in the two end pivot structures 6 to move upward through the operation window 52, ​​the second return spring 54 abuts against the shaft tube 11 and is compressed and deformed as the button assembly 5 moves upward. When the thrust that drives the button assembly 5 to move upward is released, the second return spring 54 can automatically reset the button assembly 5 by rebounding.

[0137] Since the first reset spring 34 accumulates potential energy to prepare for rebound when the unlocking slider 3 is pulled backward, when the button assembly 5 is released, the first reset spring 34 controls the unlocking slider 3 to return to its original position. Therefore, the button assembly 5 will naturally return to its downward position through the linkage. Thus, in this embodiment, the second reset spring 54 plays the role of further controlling the button assembly 5 to reset.

[0138] Locking discs 72 are fixedly connected to both ends of the handle 7, such as... Figure 3 As shown;

[0139] The locking disc 72 is coaxially rotatably connected to the handle 7, and the locking disc 72 passes through the end pivot front cover 66 and is disposed in the cavity space of the end pivot structure 6.

[0140] The locking disc 72 has six symmetrically arranged locking grooves 73 circumferentially, such as... Figure 3 As shown;

[0141] The center line direction of the locking disc 72 corresponds to that of the push button assembly 5, such as... Figure 3 As shown;

[0142] A locking pin 74 is formed on one side of the button assembly 5, such as... Figure 5 As shown;

[0143] The locking pin 74 corresponds vertically to the locking groove 73; furthermore, only when the button assembly 5 is in the reset state, the locking pin 74 is inserted into the locking groove 73 and circumferentially limited thereto;

[0144] The reset state of button assembly 5 means that button assembly 5 has not moved upward. In application, when button assembly 5 moves upward, it corresponds to the release of the axial lock between the self-locking block 2 retracting shaft tube 11 and the disc 8. Figure 5 The gap below the locking pin 74 shown corresponds to the locking groove 73, meaning the locking pin 74 disengages from the locking groove 73, and the button assembly 5 releases the limiting position on the locking disc 72. Thus, the disc 8 and the grip 7 are simultaneously unlocked. When the button assembly 5 is released, under the action of the linkage system between the button assembly 5 and the self-locking block 2 and the second return spring 54, the button assembly 5 returns to the reset state. At this time, the locking pin 74 is inserted into the locking groove 73 and circumferentially limited thereto. The locking disc 72 cannot rotate circumferentially because the locking disc 72 and the grip 7 are coaxially connected, thereby achieving the effect of axially locking the disc 8 while locking the grip 7 relative to the end pivot structure 6.

[0145] In this embodiment, the disk 8 is axially provided with an assembly hole 81 that corresponds to the central tube assembly 1 for insertion. The inner wall of the assembly hole 81 is formed with an inner groove 82, which corresponds to the self-locking block 2. The inner groove 82 can cooperate with the self-locking block 2 in the extended state to achieve axial positioning of the central tube assembly 1 and the disk 8.

[0146] Furthermore, an assembly hole 81 is provided in the center of the disk 8 shaft, and the cross section of the shaft tube 11 is adapted to the assembly hole 81 so that it can pass through it;

[0147] Furthermore, the mounting hole 81 is a polygonal hole;

[0148] The cross section of the shaft tube 11 matches the shape of the central tube assembly 1, and the shaft tube 11 is inserted into the polygonal mounting hole 81. The polygonal fit naturally restricts the relative rotation between the shaft tube 11 and the mounting hole 81; thus, the disc 8 and the central tube assembly 1 achieve circumferential positioning, avoiding the shaking caused by the rotation of the disc 8 during use.

[0149] In this embodiment, the assembly hole 81 is a quadrilateral hole;

[0150] In this embodiment, an inner groove 82 is formed radially on the inner wall of the assembly hole 81, such as... Figure 17 As shown;

[0151] The inner groove 82 engages with the self-locking block 2 in its extended state to achieve axial locking between the central tube assembly 1 and the disc 8.

[0152] In this embodiment, the dumbbell is equipped with a base 9, such as Figure 18 , Figure 19 As shown;

[0153] The base 9 is provided with a disk slot 92 for placing the disk 8, such as Figure 18 As shown;

[0154] The base 9, corresponding to the position of the operation window, is equipped with a push rod 91 whose length is adapted to the upward displacement stroke of the button assembly 5, such as... Figure 18 As shown;

[0155] When the dumbbell is placed on the base 9, the push rod 91 is inserted into the operation window. Under the push of the push rod, the button assembly 5 moves upward, thereby controlling the self-locking block 2 to retract into the shaft tube 11. The status information displayed in the observation window 62 is marked as "unlocked". At this time, the handle 7 can rotate to adjust the extension and retraction length of the two shaft tubes 11 so that they can be mounted with the corresponding number of discs 8. When the dumbbell is separated from the base 9, the push rod 91 is disengaged from the operation window, the button assembly 5 is reset so that the self-locking block 2 extends and locks with the disc 8. The observation window displays the word "locked" and the handle 7 stops rotating.

[0156] In this embodiment, the disk slots 92 of the base 9 are detachably connected;

[0157] Furthermore, the disc slots 92 are detachably connected by a locking pin and a locking slot, thereby achieving the modularity of the disc slots 92 and allowing for the addition or removal of discs 8 in the dumbbell, thus preparing for future modifications.

[0158] Example 2

[0159] This embodiment differs from Embodiment 1 in that, in this embodiment, there is no inner tube 131 inside the shaft tube 11, and the shaft tube 11 is directly and retractably sleeved inside the shaft tube 11. The linkage swing arm 22 of the extension section of the self-locking block 2 is directly hinged to the inner wall of the shaft tube 1. With this arrangement, the self-locking block 2 is hinged to the inner wall of the shaft tube 11, which can also achieve the purpose of limiting the travel range of the self-locking block 2.

[0160] In this embodiment, the through mounting hole 81 at the center of the disk 8 is a hexagonal hole;

[0161] The shape of the shaft tube 11 corresponds to this. The corresponding self-locking block 2 and button assembly 5 system still adopts radially opposed self-locking blocks 2 and locking swing arm mechanism 35, which can be correspondingly set on any two symmetrical shaft tube 11 surfaces of the hexagonal cross section of the shaft tube 11.

[0162] In this embodiment, the linkage arm mounting base 53 is provided with a clamping structure that can be tightened or loosened, and the linkage arm mounting base 53 is clamped and fixed to the linkage arm 4 through the clamping structure.

[0163] In this embodiment, the locking disc 72 has eight symmetrically arranged locking grooves 73 around its circumference.

[0164] Example 3

[0165] This embodiment differs from Embodiment 1 in that, in this embodiment, the inner tube 131 inside the shaft tube 11 is sleeved on the shaft tube 11, and the two are fitted with a clearance and fixed by a locating pin; this facilitates disassembly and replacement during later maintenance.

[0166] In this embodiment, the locking swing arm mechanism 35 includes two sets of symmetrically arranged swing arms, and the two sets of swing arms are respectively connected to two sets of symmetrical self-locking blocks 2 which are movably embedded on the surface of the shaft tube 11.

[0167] In this embodiment, the assembly hole 81 at the center of the disk 8 is a pentagonal hole; the pentagonal hole corresponds to the shaft tube 11 to realize the circumferential positioning of the disk 8, which does not affect the mutual symmetry of the two sets of self-locking blocks 2 on the shaft tube 11, and the inner groove 82 formed in the assembly hole 81 corresponds to the self-locking block 2.

[0168] In this embodiment, the linkage arm mounting base 53 is provided with a spring pin structure, and the linkage arm mounting base 53 is fixed to the linkage arm 4 by means of the spring pin structure.

[0169] The above are merely specific embodiments of this utility model, but the technical features of this utility model are not limited thereto. Any simple changes, equivalent substitutions, or modifications made based on this utility model to achieve essentially the same technical effect are all covered within the protection scope of this utility model.

Claims

1. A state-visual dumbbell, comprising a central tube assembly (1) that is relatively telescopic along its axis and a handle (7) movably sleeved outside the central tube assembly (1), wherein the handle (7) has end pivot structures (6) at both ends, and the handle (7) is rotatably disposed between the end pivot structures (6), and rotating the handle (7) controls the telescopic movement of the central tube assembly (1), characterized in that: The central tube assembly (1) is provided with a self-locking block (2), which can extend and retract radially relative to the surface of the central tube assembly (1). The self-locking block (2) is connected to a button assembly (5) for driving it to extend and retract radially. The button assembly (5) is connected to a display mechanism, and the content displayed is related to the extension and retraction state of the self-locking block (2). The button assembly (5) is simultaneously connected to the self-locking block (2) and the display mechanism. The operation of the button assembly (5) can drive the self-locking block (2) to extend and retract radially while making the content displayed by the display mechanism change synchronously.

2. The state-visual dumbbell according to claim 1, characterized in that: The display mechanism includes a swing block (63), which is located inside the end pivot structure (6). The swing block (63) is connected to the button assembly (5) and the reciprocating motion of the button assembly (5) can drive the swing block (63) to swing back and forth. Each swing-stable position of the pendulum block (63) is associated with the extension and retraction state of the self-locking block (2).

3. A state-visual dumbbell according to claim 2, characterized in that: The end pivot structure (6) is provided with an arc-shaped groove (65), and the swing block (63) is movably disposed in the arc-shaped groove (65). The swing block (63) can swing back and forth along the groove direction of the arc-shaped groove (65). The swing block (63) is hinged to the button assembly (5) and can swing back and forth with the reciprocating motion of the button assembly (5).

4. A state-visual dumbbell according to any one of claims 2 to 3, characterized in that: The display mechanism includes an observation window (62), which is located on the surface of the end pivot structure (6). The swing block (63) is provided with at least two status information indicators. The size of the observation window (62) corresponds to the status information indicator. Whenever the swing block (63) swings to any stable swing position, the observation window (62) can only expose the corresponding status information indicator, while the other status information indicators are covered by the surface of the end pivot structure (6).

5. A state-visual dumbbell according to claim 1, characterized in that: The self-locking block (2) is provided with an unlocking slide (3), which is controlled by the button assembly (5). The button assembly (5) can control the unlocking slide (3) to make axial displacement. A locking swing arm mechanism (35) is connected between the unlocking slide (3) and the self-locking block (2). The locking swing arm mechanism (35) is connected between the unlocking slide (3) and the self-locking block (2). The button assembly (5) drives the unlocking slide (3) to move, which can drive the locking swing arm mechanism (35) to make mechanical movement, and then drive the self-locking block (2) to achieve radial extension and retraction through the locking swing arm mechanism (35).

6. A state-visual dumbbell according to claim 5, characterized in that: The self-locking block (2) is at least a pair of radially opposed self-locking blocks (2). The locking swing arm mechanism (35) includes a first swing arm (36) and a second swing arm (37). The ends of the first swing arm (36) and the second swing arm (37) that are far apart from each other are respectively hinged to the two self-locking blocks (2). The other ends of the first swing arm (36) and the second swing arm (37) are hinged to the unlocking slide handle (3). The axial displacement of the unlocking slide handle (3) can drive the first swing arm (36) and the second swing arm (37) to swing between the collinear dead point position and the parallel position. When the first swing arm (36) and the second swing arm (37) swing to the collinear dead point position, the axis of the two swing arms is collinear with the radial extension and retraction direction of the two self-locking blocks (2). In this state, the self-locking block (2) extends out of the surface of the central tube assembly (1) and the self-locking block (2) will not be squeezed from the outside and retracted.

7. A state-visual dumbbell according to claim 6, characterized in that: The unlocking slider (3) is provided with a guide pin (31), and one end of the unlocking slider (3) is provided with a vertical guide groove (32). The guide pin (31) is movably passed through the vertical guide groove (32). The unlocking slider (3) is provided with an independent oblique guide groove (33). The oblique guide groove (33) is opened in the central tube group (1). The guide pin (31) is movably passed through the oblique guide groove (33). The button assembly (5) is provided with a linkage arm (4). The linkage arm (4) is connected between the button assembly (5) and the guide pin (31). The linkage arm (4) is used to transmit the driving force of the button assembly (5) to the guide pin (31).

8. A state-visual dumbbell according to claim 1, characterized in that: The central tube assembly (1) includes two shaft tubes (11) with their axes collinear. Each shaft tube (11) is provided with a sliding key (13), and the two sliding keys (13) are mirror-symmetrical in their inclination angles. The grip (7) has a double-threaded thread (75) with interlaced lines, and the thread (75) meshes with the two sliding keys (13).

9. A state-visual dumbbell according to claim 1, characterized in that: The end pivot structure (6) is provided with a locking disc (72) that rotates coaxially with the handle (7). The locking disc (72) has at least one locking groove (73) in the circumferential direction. The button assembly (5) is fixedly connected with a locking pin (74). The locking pin (74) can engage with the locking groove (73) during the reciprocating motion of the button assembly (5). The locking pin (74) engaging with the locking groove (73) can restrict the rotation of the locking disc (72).

10. A state-visual dumbbell according to claim 1, characterized in that: The device includes a disc (8) movably connected to the central tube assembly (1). The disc (8) has an axially formed assembly hole (81) that corresponds to the central tube assembly (1). The inner wall of the assembly hole (81) has an inner groove (82) that corresponds to the self-locking block (2). The inner groove (82) can cooperate with the self-locking block (2) in the extended state to achieve axial positioning of the central tube assembly (1) and the disc (8).

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