Intelligent wearable equipment for health management

By designing a detachable strap structure and a combination of multiple mechanisms in a smart watch, the problem of difficulty in disassembling and assembly of existing smart watch straps is solved, and stable connection and convenient disassembly are achieved, reducing costs.

CN119969702AInactive Publication Date: 2025-05-13SHANGHAI YIKANGLIAN DIGITAL TECHNOLOGY CO LTD
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Patent Information

Application Number
CN202510146650.5
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2025-02-10
Publication Date
2025-05-13
Estimated Expiration
Not applicable · inactive patent

AI Technical Summary

Technical Problem

The existing smart watch straps are difficult to disassemble and assemble, and the connection structure is complex and costly.

Method used

A health management smart wearable device is designed, adopting a detachable strap structure, and the stable connection and convenient disassembly between the strap and the watch body are achieved through the combination of positioning mechanism, installation mechanism, pressing mechanism, lifting mechanism and limiting mechanism.

Benefits of technology

The stable connection between the watch strap and the watch body is achieved, the disassembly process is simplified, and the assembly complexity and cost are reduced.

✦ Generated by Eureka AI based on patent content.

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Abstract

The invention discloses an intelligent wearable device for health management, and belongs to the technical field of intelligent wearable devices, the intelligent wearable device for health management comprises a watch body, a watchband is detachably mounted in the watch body, a positioning mechanism is fixedly mounted on the surface of the watch body, one end of the watchband is rotatably connected with a mounting mechanism, and the other end of the watchband is rotatably connected with the positioning mechanism. A pressing mechanism, a lifting mechanism and a limiting mechanism are slidably connected to the interior of the watch body, and when the watchband is inserted into the watch body, the watchband is fixed through a positioning mechanism; the pressing mechanism presses one abutting block on the surface of the mounting plate, and the lifting mechanism presses the other abutting block on the surface of the mounting plate, so that the two abutting blocks are attached to the two baffles more tightly, the stability of the watchband in the watch body is further improved, the pressing mechanism presses one abutting block on the surface of the mounting plate, and the lifting mechanism presses the other abutting block on the surface of the mounting plate.
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Description

Technical Field

[0001] The present invention belongs to the technical field of smart wearable devices, and in particular relates to a health management smart wearable device. Background Art

[0002] Smart wearable devices realize user information interaction, human health monitoring, healthy relaxation, life entertainment and other functions through built-in sensors, wireless communication, integrated chips, multimedia technology, etc. It has five basic characteristics: wearability, mobility, sustainability, interactivity and simple operability. As one of the smart wearable devices, smart watches not only have the basic function of displaying time, but also have various functions such as receiving reminders, making and receiving calls, monitoring physical indicators, and recording exercise processes, and are deeply favored by users.

[0003] Smart watches generally include a watch body and a strap connected to the watch body. The watch body is used to provide display and interactive functions and is worn on the user's wrist through the strap. Since common smart watch straps are made of rubber, they are not convenient to fold like the metal straps of traditional watches. Therefore, the existing smart watch straps are generally separated from the watch body by at least one end to achieve the wearing and taking off of the watch. In the prior art, it is difficult to disassemble and assemble the watch body and the strap, and the connection structure is not only complicated to assemble, but also costly.

[0004] Therefore, there is an urgent need to provide a health management smart wearable device to solve the above problems. Summary of the invention

[0005] The technical problem to be solved by the present invention is to overcome the shortcomings of the above-mentioned prior art and provide a health management smart wearable device.

[0006] The technical solution adopted to solve the above technical problems is: to provide a health management smart wearable device, including a watch body, a watch strap is detachably installed inside the watch body, a positioning mechanism is fixedly installed on the surface of the watch body, and also includes:

[0007] One end of the watch strap is rotatably connected with a mounting mechanism, the interior of the watch body is slidably connected with a pressing mechanism, the interior of the watch body is slidably connected with a lifting mechanism, and the interior of the watch body is slidably connected with a limiting mechanism.

[0008] The present invention is further configured as follows: a mounting groove is provided on one side of the meter body, a symmetrical stopper is fixedly installed inside the mounting groove, a plug hole is provided inside the stopper, and a protrusion is fixedly installed inside the mounting groove.

[0009] Through the above technical solution, the mounting groove is used for inserting the watch strap, and the two ends of the mounting plate are respectively in contact with two blocks, which block the mounting plate to prevent the mounting plate from moving out of the mounting groove, thereby forming a connection between the watch strap and the watch body. The setting of the jack facilitates the insertion of the insertion rod to prevent the watch strap from shifting inside the watch body, and the setting of the protrusion facilitates the limiting mechanism to limit the lifting plate.

[0010] The present invention is further configured as follows: an insertion rod is fixedly installed at one end of the strap, and the insertion rod is movably inserted into the socket; a symmetrical connecting plate is fixedly installed at one end of the strap, and the connecting plate is movably inserted into the installation groove; and a positioning hole is opened on the surface of the insertion rod.

[0011] Through the above technical solution, when the strap is inserted into the installation groove, the insertion rod is simultaneously inserted into the socket to prevent the strap from being offset. The connecting plate supports the installation mechanism to achieve the connection between the strap and the watch body. The positioning column and the positioning hole are coordinated to make the strap more stable inside the watch body.

[0012] The present invention is further configured as follows: the positioning mechanism includes a positioning column, the positioning column is slidably connected to the inside of the watch body, the positioning column is movably inserted into the positioning hole, a positioning groove is opened inside the watch body, a positioning ring is fixedly installed on the surface of the positioning column, the positioning column and the positioning ring are slidably connected to the inside of the positioning groove, a first spring is fixedly installed on the surface of the positioning ring, the other end of the first spring is fixedly connected to the inner wall of the positioning groove, and the positioning column passes through the inside of the first spring.

[0013] Through the above technical solution, before the watch strap is inserted into the watch body, the positioning column is moved out from the installation groove. After the watch strap is inserted into the watch body, the insertion rod is aligned with the insertion hole and inserted. The positioning hole and the positioning column are in the same vertical plane. At this time, the positioning column is loosened, and with the cooperation of the first spring and the positioning ring, the positioning column can be stably inserted into the positioning hole, thereby fixing the watch strap inside the installation groove.

[0014] The present invention is further configured as follows: the mounting mechanism includes a mounting plate, the mounting plate is rotatably connected between two connecting plates, abutment blocks are fixedly installed at both ends of the mounting plate, the abutment block is movably fitted with one side of the stop block, a rotating shaft is fixedly installed inside the mounting plate, torsion springs are fixedly installed on both sides of the mounting plate, one end of the torsion spring is fixedly connected to the inner wall of the connecting plate, and both ends of the rotating shaft are rotatably connected to the inner wall of the mounting plate.

[0015] Through the above technical solution, when the watch strap is inserted into the mounting groove, the mounting plate is first in a right-angle state. When the mounting plate is completely inserted into the mounting groove, the mounting plate rotates under the action of the torsion spring and the rotating shaft, so that the two ends of the mounting plate are in the same vertical plane, and the abutment block and the baffle are in contact with each other to prevent the watch strap from detaching from the mounting groove.

[0016] The present invention is further configured as follows: the pressing mechanism includes a pressing plate, the pressing plate is movably fitted with an abutment block, a second spring is fixedly installed on the surface of the pressing plate, a pressing groove is opened inside the watch body, the other end of the second spring is fixedly connected to the inner wall of the pressing groove, and the pressing plate is slidably connected inside the pressing groove.

[0017] Through the above technical solution, the pressing plate presses the abutment block at one end of the mounting plate so that the abutment block can fit tightly with the baffle plate. The pressing groove provides a movable space for the pressing plate. The second spring applies pressure to the pressing plate to improve the stability between the abutment block and the pressing plate and the baffle plate.

[0018] The present invention is further configured as follows: the lifting mechanism includes a lifting plate, the lifting plate is movably fitted with another abutment block, a third spring is fixedly installed on the surface of the lifting plate, a lifting groove is opened inside the table body, the other end of the third spring is fixedly connected to the inner wall of the lifting groove, and the lifting plate is slidably connected inside the lifting groove.

[0019] Through the above technical solution, the lifting plate is initially located inside the lifting groove, the third spring is in a squeezed state, the other abutment block contacts the surface of the lifting plate and is located at the angle between the lifting plate and the baffle plate, the lifting groove provides a movable space for the lifting plate, and the third spring lifts the lifting plate to improve the stability between the abutment block and the lifting plate and the baffle plate.

[0020] The present invention is further configured as follows: the limiting mechanism includes a limiting plate, the limiting plate is L-shaped, a fixing column is fixedly installed at one end of the limiting plate, the fixing column is movably fitted with another abutment block, the other end of the limiting plate is movably fitted with the surface of the lifting plate, a fourth spring is fixedly installed on one side of the limiting plate, a limiting groove is provided on the surface of the protrusion, the other end of the fourth spring is fixedly connected to the inner wall of the limiting groove, and the limiting plate is slidably connected inside the limiting groove.

[0021] Through the above technical solution, the limiting plate limits the lifting plate. When the watch strap and the watch body need to be removed, the watch strap is continuously inserted into the watch body. At this time, the bottom of the mounting plate is squeezed by the protrusion to rotate, and the lower abutment block moves to the right until it contacts the fixed column, further driving the limiting plate to move inside the limiting groove. After the limiting plate moves to the right, it moves away from the surface of the lifting plate. At this time, the third spring rebounds to lift the lifting plate, and the upper surfaces of the baffle plate, the lifting plate and the protrusion are in the same horizontal plane. The watch strap is pulled out again, and the lower abutment block moves from the baffle plate, the lifting plate and the protrusion surface to the outside of the watch body, making it convenient for the watch strap to be taken out as a whole later.

[0022] The beneficial effects of the present invention are as follows:

[0023] 1. The present invention is provided with a positioning mechanism. When the watch strap is inserted into the watch body, the positioning mechanism is used to fix the watch strap. A mounting mechanism is provided. By rotating the mounting plate, the abutment block can contact and abut with the two baffles, further improving the stability of the watch strap inside the watch body, thereby achieving a stable connection and making it more convenient to disassemble.

[0024] 2. The present invention is provided with a pressing mechanism and a lifting mechanism. The pressing mechanism presses one abutment block on the surface of the mounting plate, and the lifting mechanism presses another abutment block on the surface of the mounting plate, thereby making the fit between the two abutment blocks and the two baffles tighter, further improving the stability between the watch strap and the watch body. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention;

[0026] Figure 2 It is a schematic diagram of the cross-sectional structure of the present invention;

[0027] Figure 3 It is a front structural schematic diagram of the present invention;

[0028] Figure 4 It is a schematic diagram of the structure of the watchband of the present invention;

[0029] Figure 5 It is a schematic diagram of the structure of the meter body of the present invention;

[0030] Figure 6 for Figure 3 Enlarged view of point A in the middle;

[0031] Figure 7 for Figure 5 Enlarged view of point B in the middle.

[0032] 1. watch body; 11. mounting groove; 12. stopper; 13. socket; 14. projection; 2. watch strap; 21. insertion rod; 22. connecting plate; 23. positioning hole; 3. positioning mechanism; 31. positioning column; 32. positioning groove; 33. positioning ring; 34. first spring; 4. mounting mechanism; 41. mounting plate; 42. abutment block; 43. rotating shaft; 44. torsion spring; 5. pressing mechanism; 51. pressing plate; 52. second spring; 53. pressing groove; 6. lifting mechanism; 61. lifting plate; 62. third spring; 63. lifting groove; 7. limiting mechanism; 71. limiting plate; 72. fixing column; 73. fourth spring; 74. limiting groove. DETAILED DESCRIPTION

[0033] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0034] See also Figure 1-Figure 7 The present application provides a health management smart wearable device, including a watch body 1, a watch strap 2 is detachably installed inside the watch body 1, and a positioning mechanism 3 is fixedly installed on the surface of the watch body 1.

[0035] like Figure 2 and Figure 5 As shown, a mounting groove 11 is provided on one side of the meter body 1 , a symmetrical stopper 12 is fixedly installed inside the mounting groove 11 , a plug hole 13 is provided inside the stopper 12 , and a protrusion 14 is fixedly installed inside the mounting groove 11 .

[0036] Furthermore, in this embodiment, the mounting groove 11 is used for inserting the watch strap 2, and the two ends of the mounting plate 41 are respectively in contact with two blocks 12. The two blocks 12 block the mounting plate 41 to prevent the mounting plate 41 from moving out of the mounting groove 11, thereby forming a connection between the watch strap 2 and the watch body 1. The setting of the jack 13 facilitates the insertion of the insertion rod 21 to prevent the watch strap 2 from shifting inside the watch body 1, and the setting of the protrusion 14 facilitates the limiting mechanism 7 to limit the lifting plate 61.

[0037] like Figure 2 and Figure 3 As shown, an insertion rod 21 is fixedly installed at one end of the strap 2, and the insertion rod 21 is movably inserted into the socket 13. A symmetrical connecting plate 22 is fixedly installed at one end of the strap 2, and the connecting plate 22 is movably inserted into the installation groove 11. A positioning hole 23 is opened on the surface of the insertion rod 21.

[0038] Furthermore, in this embodiment, when the strap 2 is inserted into the installation groove 11, the insertion rod 21 is simultaneously inserted into the insertion hole 13 to prevent the strap 2 from shifting. The connecting plate 22 supports the installation mechanism 4 to achieve the connection between the strap 2 and the watch body 1. The positioning column 31 and the positioning hole 23 are coordinated to make the strap 2 more stable inside the watch body 1.

[0039] like Figure 6 As shown, the positioning mechanism 3 includes a positioning column 31, which is slidably connected to the inside of the meter body 1, and the positioning column 31 is movably inserted into the positioning hole 23. A positioning groove 32 is opened inside the meter body 1, and a positioning ring 33 is fixedly installed on the surface of the positioning column 31. The positioning column 31 and the positioning ring 33 are slidably connected to the inside of the positioning groove 32. A first spring 34 is fixedly installed on the surface of the positioning ring 33, and the other end of the first spring 34 is fixedly connected to the inner wall of the positioning groove 32, and the positioning column 31 runs through the inside of the first spring 34.

[0040] Furthermore, in this embodiment, before the watch strap 2 is inserted into the watch body 1, the positioning column 31 is moved out from the inside of the installation groove 11. After the watch strap 2 is inserted into the watch body 1, the insertion rod 21 is aligned with the insertion hole 13 and inserted. The positioning hole 23 and the positioning column 31 are in the same vertical plane. At this time, the positioning column 31 is loosened, and with the cooperation of the first spring 34 and the positioning ring 33, the positioning column 31 can be stably inserted into the positioning hole 23, thereby fixing the watch strap 2 inside the installation groove 11.

[0041] One end of the watch strap 2 is rotatably connected to a mounting mechanism 4 , the inside of the watch body 1 is slidably connected to a pressing mechanism 5 , the inside of the watch body 1 is slidably connected to a lifting mechanism 6 , and the inside of the watch body 1 is slidably connected to a limiting mechanism 7 .

[0042] like Figure 2 and Figure 4 As shown, the mounting mechanism 4 includes a mounting plate 41, which is rotatably connected between the two connecting plates 22, and abutment blocks 42 are fixedly installed at both ends of the mounting plate 41, and the abutment block 42 is movably fitted with one side of the stopper 12, and a rotating shaft 43 is fixedly installed inside the mounting plate 41, and torsion springs 44 are fixedly installed on both sides of the mounting plate 41, one end of the torsion spring 44 is fixedly connected to the inner wall of the connecting plate 22, and both ends of the rotating shaft 43 are rotatably connected to the inner wall of the mounting plate 41.

[0043] Furthermore, in this embodiment, when the watch strap 2 is inserted into the mounting groove 11, the mounting plate 41 is first in a right-angle state. After the mounting plate 41 is completely inserted into the mounting groove 11, the mounting plate 41 rotates under the action of the torsion spring 44 and the rotating shaft 43, so that the two ends of the mounting plate 41 are in the same vertical plane, and the abutment block 42 and the stop block 12 are in abutment with each other, thereby preventing the watch strap 2 from detaching from the mounting groove 11.

[0044] like Figure 2 and Figure 7 As shown, the pressing mechanism 5 includes a pressing plate 51, which is movably fitted with an abutment block 42, a second spring 52 is fixedly installed on the surface of the pressing plate 51, a pressing groove 53 is opened inside the watch body 1, the other end of the second spring 52 is fixedly connected to the inner wall of the pressing groove 53, and the pressing plate 51 is slidably connected inside the pressing groove 53.

[0045] In this embodiment, the pressing plate 51 presses the abutment block 42 at one end of the mounting plate 41 so that the abutment block 42 can fit tightly with the stop block 12. The pressing groove 53 provides a movable space for the pressing plate 51. The second spring 52 applies pressure to the pressing plate 51 to improve the stability between the abutment block 42 and the pressing plate 51 and the stop block 12.

[0046] like Figure 2 and Figure 6As shown, the lifting mechanism 6 includes a lifting plate 61, which is movably fitted with another abutment block 42, a third spring 62 is fixedly installed on the surface of the lifting plate 61, a lifting groove 63 is opened inside the watch body 1, the other end of the third spring 62 is fixedly connected to the inner wall of the lifting groove 63, and the lifting plate 61 is slidably connected inside the lifting groove 63.

[0047] Furthermore, in this embodiment, the lifting plate 61 is initially located inside the lifting groove 63, the third spring 62 is in a squeezed state, the other abutment block 42 is in contact with the surface of the lifting plate 61 and is located at the angle between the lifting plate 61 and the stop block 12, the lifting groove 63 provides a movable space for the lifting plate 61, and the third spring 62 lifts the lifting plate 61 to improve the stability between the abutment block 42 and the lifting plate 61 and the stop block 12.

[0048] like Figure 2 and Figure 6 As shown, the limiting mechanism 7 includes a limiting plate 71, which is L-shaped. A fixing column 72 is fixedly installed at one end of the limiting plate 71. The fixing column 72 is movably fitted with another abutment block 42. The other end of the limiting plate 71 is movably fitted with the surface of the lifting plate 61. A fourth spring 73 is fixedly installed on one side of the limiting plate 71. A limiting groove 74 is provided on the surface of the protrusion 14. The other end of the fourth spring 73 is fixedly connected to the inner wall of the limiting groove 74. The limiting plate 71 is slidably connected inside the limiting groove 74.

[0049] The present embodiment further has the limit plate 71 limiting the lifting plate 61. When the watch band 2 and the watch body 1 need to be removed, the watch band 2 is continuously inserted into the watch body 1. At this time, the lower part of the mounting plate 41 is squeezed by the protrusion 14 to realize rotation. The lower abutment block 42 moves to the right until it contacts the fixing column 72, further driving the limit plate 71 to move inside the limit groove 74. After the limit plate 71 moves to the right, it moves away from the surface of the lifting plate 61. At this time, the third spring 62 rebounds to lift the lifting plate 61. The upper surfaces of the stop block 12, the lifting plate 61 and the protrusion 14 are in the same horizontal plane. The watch band 2 is pulled out again, and the lower abutment block 42 moves from the surfaces of the stop block 12, the lifting plate 61 and the protrusion 14 to the outside of the watch body 1, so as to facilitate the subsequent removal of the watch band 2 as a whole.

[0050] When the watch band 2 and the watch body 1 need to be installed, the positioning column 31 is pulled upwards, and the mounting plate 41 is inserted into the mounting groove 11 at a right angle. At this time, the insertion rod 21 is aligned with the insertion hole 13 and inserted. When the positioning hole 23 and the positioning column 31 are in the same vertical plane, the positioning column 31 is loosened, and the positioning column 31 can be stably inserted into the positioning hole 23 under the cooperation of the first spring 34 and the positioning ring 33, so that the watch band 2 is fixed in the mounting groove 11. After the mounting plate 41 moves to the inside of the mounting groove 11, it rotates under the action of the torsion spring 44, and the two abutment blocks 42 are fitted with the stopper 12 to form an abutment, thereby realizing the connection between the watch band 2 and the watch body 1. When it is necessary to separate the strap 2 from the watch body 1, continue to insert the strap 2 into the watch body 1. At this time, the bottom of the mounting plate 41 is squeezed by the protrusion 14 to rotate, and the lower abutment block 42 moves to the right until it contacts the fixing column 72, further driving the limit plate 71 to move inside the limit groove 74. After the limit plate 71 moves to the right, it moves away from the surface of the lifting plate 61. At this time, the third spring 62 rebounds to lift the lifting plate 61, and the upper surfaces of the stop block 12, the lifting plate 61 and the protrusion 14 are in the same horizontal plane. The strap 2 is pulled out again, and the lower abutment block 42 moves from the surface of the stop block 12, the lifting plate 61 and the protrusion 14 to the outside of the watch body 1, making it convenient for the strap 2 to be taken out as a whole later.

[0051] The above description is only a preferred embodiment of the present invention and is not intended to limit the protection scope of the present invention.

Claims

1. A health management smart wearable device, comprising a watch body (1), characterized in that: A watch strap (2) is detachably mounted inside the watch body (1), a positioning mechanism (3) is fixedly mounted on the surface of the watch body (1), and further comprises: One end of the watch strap (2) is rotatably connected to a mounting mechanism (4), the watch body (1) is slidably connected to a pressing mechanism (5), the watch body (1) is slidably connected to a lifting mechanism (6), and the watch body (1) is slidably connected to a limiting mechanism (7).

2. A health management smart wearable device according to claim 1, characterized in that: A mounting groove (11) is provided on one side of the meter body (1), a symmetrical stopper (12) is fixedly installed inside the mounting groove (11), a plug hole (13) is provided inside the stopper (12), and a protrusion (14) is fixedly installed inside the mounting groove (11).

3. A health management smart wearable device according to claim 2, characterized in that: An insertion rod (21) is fixedly mounted on one end of the watch strap (2), and the insertion rod (21) is movably inserted into the insertion hole (13). A symmetrical connecting plate (22) is fixedly mounted on one end of the watch strap (2), and the connecting plate (22) is movably inserted into the installation groove (11). A positioning hole (23) is provided on the surface of the insertion rod (21).

4. A health management smart wearable device according to claim 3, characterized in that: The positioning mechanism (3) comprises a positioning column (31), the positioning column (31) is slidably connected to the inside of the meter body (1), the positioning column (31) is movably inserted into the inside of the positioning hole (23), a positioning groove (32) is provided inside the meter body (1), a positioning ring (33) is fixedly installed on the surface of the positioning column (31), the positioning column (31) and the positioning ring (33) are slidably connected to the inside of the positioning groove (32), a first spring (34) is fixedly installed on the surface of the positioning ring (33), the other end of the first spring (34) is fixedly connected to the inner wall of the positioning groove (32), and the positioning column (31) passes through the inside of the first spring (34).

5. The health management smart wearable device according to claim 3, characterized in that: The mounting mechanism (4) comprises a mounting plate (41), the mounting plate (41) being rotatably connected between two connecting plates (22), abutment blocks (42) being fixedly mounted at both ends of the mounting plate (41), the abutment blocks (42) being movably fitted with one side of the stopper (12), a rotating shaft (43) being fixedly mounted inside the mounting plate (41), torsion springs (44) being fixedly mounted on both sides of the mounting plate (41), one end of the torsion spring (44) being fixedly connected to the inner wall of the connecting plate (22), and both ends of the rotating shaft (43) being rotatably connected to the inner wall of the mounting plate (41).

6. A health management smart wearable device according to claim 1, characterized in that: The pressing mechanism (5) comprises a pressing plate (51), the pressing plate (51) is movably fitted with an abutment block (42), a second spring (52) is fixedly mounted on the surface of the pressing plate (51), a pressing groove (53) is provided inside the watch body (1), the other end of the second spring (52) is fixedly connected to the inner wall of the pressing groove (53), and the pressing plate (51) is slidably connected inside the pressing groove (53).

7. The health management smart wearable device according to claim 5, characterized in that: The lifting mechanism (6) comprises a lifting plate (61), the lifting plate (61) is movably fitted with another abutment block (42), a third spring (62) is fixedly mounted on the surface of the lifting plate (61), a lifting groove (63) is provided inside the watch body (1), the other end of the third spring (62) is fixedly connected to the inner wall of the lifting groove (63), and the lifting plate (61) is slidably connected inside the lifting groove (63).

8. A health management smart wearable device according to claim 7, characterized in that: The limiting mechanism (7) comprises a limiting plate (71), the limiting plate (71) is L-shaped, a fixing column (72) is fixedly installed at one end of the limiting plate (71), the fixing column (72) is movably fitted with another abutting block (42), the other end of the limiting plate (71) is movably fitted with the surface of the lifting plate (61), a fourth spring (73) is fixedly installed on one side of the limiting plate (71), a limiting groove (74) is provided on the surface of the protrusion (14), the other end of the fourth spring (73) is fixedly connected to the inner wall of the limiting groove (74), and the limiting plate (71) is slidably connected inside the limiting groove (74).