Watch protection shell for assisting electrocardiogram display

Abstract

A watch protective shell for assisting electrocardiogram display comprises a shell body and a knob piece. A containing cavity for containing a watch body is formed in the shell, a notch protruding out of a detection part is formed in the bottom wall of the containing cavity, and a rotating hole is formed in the side wall of the containing cavity. The knob piece is made of a conductive material, the knob piece is rotationally connected with the rotating hole and can move in the axis direction of the rotating hole, the head end of the knob piece is arranged outside, and the tail end of the knob piece is arranged in the containing cavity, connected with the watch crown in a sleeving mode and attached to the titanium electrode; specifically, the shell has the function of protecting the intelligent watch, and the knob piece is convenient for a user to drive the watch crown to control the intelligent watch; when the electrocardiogram display function is used, the wrist is attached to the detection part to transmit an electric signal, the fingertip is attached to the knob piece to transmit the electric signal, and therefore a loop is formed through the two collection points to record the cardiac electric signal, and use convenience is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of watch accessories, and in particular relates to a watch protective shell for assisting electrocardiogram display. Background Art

[0002] With the development and progress of science and technology, smart watches have gradually become an indispensable electronic product in people's daily life. They have many functions such as remote unlocking, heart rate detection and electrocardiogram display; among them, as shown in the attached Figure 1 As shown, when using the ECG display function, the crown covered with titanium electrodes on the side of the body and the detection area covered with silicon chromium carbon nitride on the bottom of the body are used to detect the electrical signals of the fingertips and wrists respectively. A loop is formed based on the two collection points to record the heart's electrical signals and display the ECG on the touch screen. For users with sinus arrhythmia and atrial fibrillation, it can serve as a warning and risk avoidance tool.

[0003] The body and touch screen of smart watches are easily scratched during use, so watch protective cases have appeared on the market. The watch protective cases can surround the smart watch, thereby relying on the buffering effect to prevent the body and touch screen of the smart watch from being bumped and damaged; referring to the patent application number 2023205699394, it can be seen that the side walls of some watch protective cases will also be provided with corresponding knobs corresponding to the crown to assist users in controlling the smart watch.

[0004] However, in actual use, it was found that the existing knob does not have the function of conducting electricity, and therefore cannot transmit the electrical signals from the user's fingertips to the crown, affecting the formation of the signal circuit, resulting in the electrocardiogram display function of the smart watch being unable to be used normally, causing great inconvenience to the user; therefore, there is an urgent need to design a watch protective case that can be used to assist in the electrocardiogram display. Utility Model Content

[0005] 1. Technical issues to be resolved

[0006] The utility model provides a watch protective case for assisting electrocardiogram display, wherein the knob part of the watch has a conductive function and can transmit the electrical signal of the user's fingertips to the crown to form a signal loop, thereby ensuring the normal use of the electrocardiogram display function of the smart watch.

[0007] (II) Technical solution

[0008] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0009] A watch protective case for assisting electrocardiogram display comprises a shell and a knob; a housing cavity for placing a watch body is provided inside the shell, a notch for protruding a detection part of the body is provided on the bottom wall of the housing cavity, and a rotating hole corresponding to a crown is provided on the side wall of the housing cavity; the knob is made of conductive material, and is rotatably connected to the rotating hole and can move along the axis of the rotating hole, the head end of the knob is placed outside, and the tail end of the knob is placed in the housing cavity to sleeve on the outer periphery of the crown and fit the titanium electrode on the crown.

[0010] Preferably, the knob component includes a wheel button and a crown sleeve; the crown sleeve is placed in the accommodating cavity to sleeve the outer periphery of the crown and fit the titanium electrode of the crown, and the crown sleeve is provided with a shaft rod which is rotatably connected to the rotating hole and can move along the axial direction of the rotating hole; the wheel button is placed outside and connected to the shaft rod to control the rotation and movement of the crown sleeve; the crown sleeve, the shaft rod and the wheel button are all made of conductive materials.

[0011] Preferably, a convex column is provided on the outer wall of the shell, and the rotating hole is coaxially arranged in the convex column; a concave cavity is provided on the wheel button, and the wheel button is coaxially provided with an integrally formed sleeve in the concave cavity, the concave cavity is adapted to the convex column, and the sleeve is sleeved and fixed to the shaft rod.

[0012] Preferably, the knob member further comprises a flexible contact block, which is planar in design and installed in the crown sleeve, and the crown sleeve closely fits the titanium electrode of the crown through the flexible contact block, and the flexible contact block is also made of conductive material.

[0013] Preferably, the crown sleeve, the shaft and the wheel button are all made of metal conductive materials such as copper, iron, 316 stainless steel, etc., and the flexible contact block is made of flexible conductive materials such as conductive foam, conductive glue, conductive cloth, etc.

[0014] Preferably, the knob member also includes an elastomer, the shell is provided with a driving cavity on the inner side of the rotating hole, and the shaft rod can sequentially pass through the driving cavity and the rotating hole; the elastomer is placed in the driving cavity and abuts against the crown sleeve and the top wall of the driving cavity to drive the crown sleeve to fit tightly against the titanium electrode of the crown.

[0015] Preferably, the elastic body is a spring, the spring is sleeved on the shaft, and two ends of the spring respectively abut against the crown sleeve and the top wall of the driving cavity.

[0016] Preferably, the knob member also includes a sealing ring, the shell adopts a sealed and waterproof design, and the shell is provided with a sealing cavity at the outside of the rotating hole, and the shaft rod can pass through the rotating hole and the sealing cavity in sequence; the sealing ring is placed in the sealing cavity and sleeved on the shaft rod, and the sealing ring abuts against the shaft rod and the inner wall of the sealing cavity.

[0017] Preferably, a plurality of anti-slip grooves are provided in a circumferential array on the inner wall of the crown sleeve to closely fit the outer side wall of the crown.

[0018] Preferably, anti-slip grooves are provided on the circumferential side wall of the wheel button.

[0019] Preferably, the knob member further comprises a decorative ring, and the decorative ring is sleeved and mounted on the wheel knob.

[0020] (III) Beneficial effects

[0021] The utility model provides a watch protective case for assisting electrocardiogram display. The case is designed to protect the body and touch screen of a smart watch, so as to prevent the smart watch from being damaged by collision. A notch is designed on the case so that the wrist can fit the detection part to transmit the electrical signal. A knob is designed to drive the crown so that the user can control the smart watch. Since the knob is made of conductive material, the fingertip can transmit the electrical signal to the titanium electrode, so that the two collection points of the smart watch can form a loop to record the heart electrical signal, thereby ensuring that the electrocardiogram display function can be used normally and improving the convenience of use. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0023] Figure 1 A schematic diagram showing the use of the electrocardiogram display function of a smart watch;

[0024] Figure 2 The overall structure schematic diagram of the utility model is shown;

[0025] Figure 3 Shows a partial structural schematic diagram of the utility model Figure 1 ;

[0026] Figure 4 Shows Figure 3 A top view of

[0027] Figure 5 Shows Figure 4 Sectional view AA;

[0028] Figure 6Shows Figure 5 The enlarged view of point A in the middle;

[0029] Figure 7 Shows Figure 3 The main view;

[0030] Figure 8 Shows Figure 7 BB of the cross-sectional view;

[0031] Fig. 9 Shows Figure 8 The enlarged view of point B in the middle;

[0032] Fig.10 Shows Figure 3 Decomposition diagram of Figure 1 ;

[0033] Fig.11 Shows Figure 3 Decomposition diagram of Figure 2 ;

[0034] Fig.12 The exploded schematic diagram of the knob member of the utility model is shown.

[0035] In the figure: 1 shell, 10 accommodating cavity, 11 notch, 12 rotating hole, 13 boss, 14 driving cavity, 15 sealing cavity, 2 knob, 21 wheel button, 211 concave cavity, 212 sleeve, 213 anti-skid pattern, 22 crown sleeve, 220 shaft rod, 221 anti-skid groove, 23 flexible contact block, 24 elastomer, 25 sealing ring, 26 decorative ring, 3 body, 31 detection part, 32 crown, 320 titanium electrode, 33 touch screen. DETAILED DESCRIPTION

[0036] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all of the embodiments. Based on the embodiments of the present application, all other embodiments obtained by ordinary technicians in this field without making creative work belong to the protection scope of the present application. It is understood that the drawings are only provided for reference and illustration, and are not used to limit the present application. The connection relationship shown in the drawings is only for the convenience of clear description and does not limit the connection method.

[0037] It should be noted that when a component is considered to be "connected" to another component, it can be directly connected to the other component, or there may be an intermediate component at the same time. Unless otherwise defined, all technical and scientific terms used in this document have the same meaning as those generally understood by technicians in the technical field to which this application belongs. It should also be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, an electrical connection, or the internal connection of two components. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances. The terms used in this document in the specification of this application are only for the purpose of describing specific embodiments, and are not intended to limit this application.

[0038] It should also be noted that in the description of the present application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first", "second", and "third" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0039] See attached Figure 1 -Attached Fig.10 A watch protective case for assisting electrocardiogram display comprises a shell 1 and a knob 2; a receiving cavity 10 for placing a watch body 3 is provided inside the shell 1, a notch 11 is provided on the bottom wall of the receiving cavity 10 for a detection part 31 of the body 3 to protrude, and a rotating hole 12 corresponding to a crown 32 is provided on the side wall of the receiving cavity 10; the knob 2 is made of a conductive material, and the knob 2 is rotatably connected to the rotating hole 12 and can move along the axial direction of the rotating hole 12, the head end of the knob 2 is placed outside, and the tail end of the knob 2 is placed in the receiving cavity 10 to cover the outer periphery of the crown 32 and fit the titanium electrode 320 on the crown 32.

[0040] Specifically, before use, place the smart watch in the accommodating cavity 10, and make the detection part 31 of the body 3 protrude from the slot 11, and at the same time, connect the tail end of the knob part 2 to the crown 32, and finally use the strap to wear the watch protective case on the wrist so that the detection part 31 fits the wrist.

[0041] Under normal circumstances, the user can drive the crown 32 to rotate / move by turning / pressing the knob 2 to smoothly operate the smart watch; and because the detection part 31 of the body 3 protrudes from the notch 11, the electrical signal on the wrist can be transmitted to the detection part 31, ensuring that the user can use the heart rate detection function of the smart watch normally.

[0042] When using the electrocardiogram display function of the smart watch, the user first opens the relevant software in the smart watch through the touch screen 33, and then presses the fingertips against the front end of the knob part 2. The electrical signal can be normally transmitted to the titanium electrode 320 of the crown 32 through the knob part 2, thereby completing a signal loop between the body, arm and heart, ensuring that the smart watch can detect the heart normally and display the electrocardiogram on the touch screen 33.

[0043] It should be noted that when using the electrocardiogram display function, the user can also press the knob 2 with the fingertips so that the tail end of the knob 2 can fit tightly against the titanium electrode 320 of the crown 32 to ensure detection accuracy; and because the crown 32 of the smart watch itself has a reset function, when the user releases the knob 2, the crown 32 resets and drives the knob 2 back to its initial position.

[0044] In summary, in the utility model, the shell 1 is designed to protect the body 3 and the touch screen 33 of the smart watch to prevent the smart watch from being damaged by bumps; the notch 11 is designed on the shell 1 so that the wrist can fit the detection part 31 to transmit electrical signals; the knob 2 is designed to drive the crown 32 so that the user can control the smart watch, and because the knob 2 is made of conductive material, the fingertips can transmit electrical signals to the titanium electrode 320, so that the two collection points of the smart watch can form a loop to record the heart's electrical signals, ensuring that the electrocardiogram display function can be used normally, thereby improving the convenience of use.

[0045] See attached Figure 7 -Attached Fig.12 The knob part 2 can be a single integrally formed part, but considering that it is difficult to install it on the housing 1, in this embodiment, the knob part 2 includes a wheel knob 21 and a crown sleeve 22; the crown sleeve 22 is placed in the accommodating cavity 10 to sleeve the outer periphery of the crown 32 and fit the titanium electrode 320 of the crown 32, and the crown sleeve 22 is provided with a shaft rod 220 that is rotatably connected to the rotating hole 12 and can move along the axial direction of the rotating hole 12; the wheel knob 21 is placed outside and connected to the shaft rod 220 to control the rotation and movement of the crown sleeve 22; the crown sleeve 22, the shaft rod 220 and the wheel knob 21 are all made of conductive materials.

[0046] Specifically, during installation, first place the crown sleeve 22 in the accommodating cavity 10 and pass the shaft rod 220 through the rotating hole 12, then place the wheel button 21 to connect the shaft rod 220 from the outside, and the entire knob component 2 can be installed on the shell 1; at this time, place the smart watch in the accommodating cavity 10, so that the crown 32 is aligned with the crown sleeve 22, and then push the wheel button 21 to drive the shaft rod 220 to move inward along the axial direction of the rotating hole 12, so that the crown sleeve 22 is sleeved on the outer periphery of the crown 32 and fits the titanium electrode 320 on the crown 32.

[0047] During use, rotating the wheel knob 21 can drive the shaft 220 and the crown sleeve 22, thereby realizing the rotation operation of the crown 32; pressing the wheel knob 21 can drive the shaft 220 and the crown sleeve 22 to move inward, thereby realizing the pressing operation of the crown 32. After releasing the wheel knob 21, the crown 32 is reset and drives the crown sleeve 22 and the shaft 220 to move outward, so that the wheel knob 21 is reset for the next operation; and since the crown sleeve 22, the shaft 220 and the wheel knob 21 are all made of conductive materials, when the fingertip touches the wheel knob 21, the electrical signal can pass through the wheel knob 21, the shaft 220 and the crown sleeve 22 in sequence, and be transmitted to the titanium metal on the crown 32.

[0048] In summary, the coordinated use of the crown sleeve 22, the shaft rod 220 and the wheel knob 21 facilitates the assembly and disassembly of the knob member 2; in addition, in order to prevent the shaft rod 220 from escaping from the rotating hole 12, the diameter of the crown sleeve 22 is larger than the diameter of the rotating hole 12, thereby limiting the actual outward movement range of the shaft rod 220, while the inward movement range of the shaft rod 220 is generally determined by the movable distance of the crown 32 itself.

[0049] See attached Fig. 9 -Attached Fig.11 A convex column 13 is provided on the outer wall of the shell 1, and the rotating hole 12 is coaxially arranged in the convex column 13; a concave cavity 211 is provided on the wheel button 21, and the wheel button 21 is coaxially provided with an integrally formed sleeve 212 in the concave cavity 211, the concave cavity 211 is adapted to the convex column 13, and the sleeve 212 is sleeved and fixed to the shaft rod 220.

[0050] Specifically, the matching design of the protrusion 13 and the cavity 211 can not only reduce the installation space, making the installation of the wheel button 21 more compact, but also limit the displacement of the wheel button 21, thereby improving the installation stability of the wheel button 21; and the matching design of the sleeve 212 and the shaft rod 220 facilitates the connection between the wheel button 21 and the shaft rod 220 for electrical signal transmission; and the sleeve 212 and the shaft rod 220 can also be set to an interference fit to facilitate the installation and disassembly of the wheel button 21 and prevent the wheel button 21 from falling off easily.

[0051] See attached Figure 6 and attached Fig. 9 -Attached Fig.11The knob member 2 also includes a flexible contact block 23, which is planar in design and installed in the crown sleeve 22. The crown sleeve 22 fits tightly with the titanium electrode 320 of the crown 32 through the flexible contact block 23, and the flexible contact block 23 is also made of conductive material. The planar flexible contact block 23 can increase the contact area between the crown sleeve 22 and the titanium electrode 320 of the crown 32, so that the two can fit tightly and improve the conductive efficiency. It can also form a buffer between the crown sleeve 22 and the crown 32 to avoid rigid collision between the two and reduce the possibility of damage to the crown 32.

[0052] See attached Fig. 9 -Attached Fig.12 There are various types of conductive materials, among which the crown sleeve 22, the shaft rod 220 and the wheel button 21 are all made of metal conductive materials such as copper, iron, and 316 stainless steel, so that the crown sleeve 22, the shaft rod 220 and the wheel button 21 have good hardness to ensure structural stability and improve controllability; the flexible contact block 23 is made of flexible conductive materials such as conductive foam, conductive glue, and conductive cloth, so that the flexible contact block 23 has good deformation ability to adapt to the crown 32, ensuring that the crown sleeve 22 and the crown 32 can fit stably, improve the conductive efficiency, and at the same time, the flexible contact block 23 has a certain buffering capacity to avoid rigid collision between the crown sleeve 22 and the crown 32, thereby extending the service life of the crown 32.

[0053] See attached Figure 6 and attached Fig. 9 -Attached Fig.12 Since the crown sleeve 22 and the crown 32 are sleeve-connected, there may be a gap between the inner wall of the crown sleeve 22 and the titanium electrode 320 of the crown 32, and they cannot fit tightly. Therefore, when using the electrocardiogram display function, the user may need to use his fingertips to continuously press the wheel button 21 to drive the crown sleeve 22 to fit tightly with the titanium electrode 320 of the crown 32. The whole process is relatively troublesome to operate, and since it is difficult to control the pressing force, it is easy to drive the crown 32 during pressing, causing the electrocardiogram function software to be forced to exit, affecting normal use. To solve this problem, in the utility model, the knob member 2 also includes an elastomer 24, and the shell 1 is provided with a driving cavity 14 on the inner side of the rotating hole 12, and the shaft rod 220 can pass through the driving cavity 14 and the rotating hole 12 in sequence; the elastomer 24 is placed in the driving cavity 14 and abuts against the crown sleeve 22 and the top wall of the driving cavity 14.

[0054] Specifically, under normal circumstances, the elastomer 24 is in an initial state or a semi-compressed state to continuously provide support for the crown sleeve 22, thereby driving the crown sleeve 22 to continuously and tightly fit the titanium electrode 320 of the crown 32; in this case, the user only needs to fit his fingertips against the button 21 to use the electrocardiogram display function normally, which improves the convenience of operation; and because the elastic force of the elastomer 24 is optional, the manufacturer can provide a fixed supporting force to the crown sleeve 22 by selecting the corresponding elastomer 24, thereby effectively preventing the crown sleeve 22 from being excessively strong and driving the crown 32 to move, thereby ensuring that the electrocardiogram display function of the smart watch can be used normally.

[0055] Among them, during assembly, the elastic member is first placed in the driving cavity 14 or sleeved on the shaft 220, and then the shaft 220 is sequentially passed through the driving cavity 14 and the rotating hole 12, and then the wheel button 21 located on the outside is connected to the shaft 220; and regarding the use status of the elastomer 24, generally speaking, before the smart watch is placed in the shell 1, the elastomer 24 is in an initial state; and in the process of installing the smart watch body 3 in the accommodating cavity 10, under the squeezing of the crown 32, the elastomer 24 will be compressed and store energy until the crown sleeve 22 is aligned and coaxially sleeved on the crown 32, and the elastic member releases energy and returns to the initial state or is in a restored straight semi-compression state, so as to drive the crown sleeve 22 to tightly abut against the titanium electrode 320 of the crown 32.

[0056] It should be noted that, under normal circumstances, the selected elastomer 24 can be directly restored to its original state to support the crown sleeve 22 after the crown sleeve 22 is sleeved with the crown 32; but considering that the elasticity of the elastomer 24 will decrease after long-term use, resulting in a decrease in the supporting force and difficulty in continuing to provide support for the crown sleeve 22, the elastomer 24 can also be set to restore to a semi-compressed state to support the crown sleeve 22 after the crown sleeve 22 is sleeved with the crown 32, thereby extending the usable life of the elastomer 24, but it is necessary to ensure that the supporting force provided by the elastomer 24 in the semi-compressed state is not greater than the elastic force of the crown 32 when it resets itself, so as to avoid the elastomer 24 driving the crown 32 to move through the crown sleeve 22.

[0057] Furthermore, the elastomer 24 can be of various types, for example, a spring, a rubber sleeve, etc. For ease of understanding, the elastomer 24 in this embodiment is a spring, and the spring sleeve is arranged on the shaft 220, and the two ends of the spring respectively abut the crown sleeve 22 and the top wall of the driving cavity 14.

[0058] See attached Fig. 9 -Attached Fig.12 The knob member 2 also includes a sealing ring 25. The housing 1 adopts a sealed and waterproof design, and the housing 1 is provided with a sealing cavity 15 at the outer side of the rotating hole 12. The shaft rod 220 can pass through the rotating hole 12 and the sealing cavity 15 in sequence; the sealing ring 25 is placed in the sealing cavity 15 and sleeved on the shaft rod 220, and the sealing ring 25 abuts against the shaft rod 220 and the inner wall of the sealing cavity 15.

[0059] Specifically, during assembly, the shaft rod 220 is first passed through the rotating hole 12 to the sealing cavity 15, and then the sealing ring 25 is placed in the sealing cavity 15 and on the shaft rod 220, so that the sealing ring 25 abuts against the shaft rod 220 and the inner wall of the sealing cavity 15 to form a seal, thereby effectively preventing external water from extending into the accommodating cavity 10 through the rotating hole 12; therefore, the coordinated use of the sealing cavity 15 and the sealing ring 25 makes the knob member 2 have a waterproof function.

[0060] It should be noted that the watch protective case with waterproof function is an existing product and is relatively conventional in this technical field. Therefore, the present invention does not elaborate on how the shell 1 achieves waterproofness; but regarding the waterproofness of the knob part 2, the solution described in the prior art cannot be applied to this case. Therefore, the waterproofness of the knob part 2 is separately designed and explained in the present invention.

[0061] See attached Fig.12 A plurality of anti-slip grooves 221 are arranged in a circumferential array on the inner wall of the crown sleeve 22 to closely fit the outer side wall of the crown 32. This design can increase the friction between the crown sleeve 22 and the crown 32, making the connection between the crown sleeve 22 and the crown 32 more stable.

[0062] See attached Fig.12 The circumferential side wall of the wheel button 21 is provided with an anti-slip pattern 213 . This design can provide a fulcrum for the wheel button 21 , increase the friction between the wheel button 21 and the finger, and facilitate the user to rotate the wheel button 21 .

[0063] See attached Fig. 9 -Attached Fig.12 The knob member 2 further includes a decorative ring 26, which is sleeved and mounted on the wheel knob 21. The decorative ring 26 can increase the aesthetics, and the user can replace it according to needs, thereby increasing the fun.

[0064] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A watch protective case for assisting electrocardiogram display, characterized in that: include: A housing (1), wherein a housing (1) is provided with a receiving cavity (10) for accommodating a watch body (3), a notch (11) is provided on the bottom wall of the receiving cavity (10) for allowing a detection portion (31) of the body (3) to protrude, and a rotating hole (12) corresponding to a crown (32) is provided on the side wall of the receiving cavity (10); A knob member (2), the knob member (2) is made of a conductive material, and the knob member (2) is rotatably connected to the rotating hole (12) and can move along the axial direction of the rotating hole (12), the head end of the knob member (2) is placed outside, and the tail end of the knob member (2) is placed in the accommodating cavity (10) to be sleeved on the outer periphery of the crown (32) and fit the titanium electrode (320) on the crown (32).

2. A watch protective case for assisting electrocardiogram display according to claim 1, characterized in that: The knob member (2) comprises a wheel button (21) and a crown sleeve (22); the crown sleeve (22) is placed in the accommodating cavity (10) to be sleeved on the outer periphery of the crown (32) and fit the titanium electrode (320) of the crown (32), and the crown sleeve (22) is provided with a shaft (220) which is rotatably connected to the rotating hole (12) and can move along the axial direction of the rotating hole (12); the wheel button (21) is placed outside and connected to the shaft (220) to control the rotation and movement of the crown sleeve (22); the crown sleeve (22), the shaft (220) and the wheel button (21) are all made of conductive materials.

3. A watch protective case for assisting electrocardiogram display according to claim 2, characterized in that: The outer wall of the shell (1) is provided with a convex column (13), and the rotating hole (12) is coaxially arranged in the convex column (13); the wheel button (21) is provided with a concave cavity (211), and the wheel button (21) is coaxially provided with an integrally formed sleeve (212) in the concave cavity (211); the concave cavity (211) is matched with the convex column (13), and the sleeve (212) is sleeved and fixed to the shaft rod (220).

4. A watch protective case for assisting electrocardiogram display according to claim 2, characterized in that: The knob member (2) further comprises a flexible contact block (23), which is designed to be planar and is installed in the crown sleeve (22). The crown sleeve (22) is tightly fitted to the titanium electrode (320) of the crown (32) through the flexible contact block (23), and the flexible contact block (23) is also made of conductive material.

5. A watch protective case for assisting electrocardiogram display according to claim 4, characterized in that: The crown sleeve (22), the shaft (220) and the wheel button (21) are all made of metallic conductive material, and the flexible contact block (23) is made of flexible conductive material.

6. A watch protective case for assisting electrocardiogram display according to claim 2, characterized in that: The knob member (2) further comprises an elastic body (24); the housing (1) is provided with a driving cavity (14) on the inner side of the rotating hole (12); the shaft (220) can sequentially pass through the driving cavity (14) and the rotating hole (12); the elastic body (24) is placed in the driving cavity (14) and abuts against the crown sleeve (22) and the top wall of the driving cavity (14) to drive the crown sleeve (22) to fit tightly against the titanium electrode (320) of the crown (32).

7. A watch protective case for assisting electrocardiogram display according to claim 6, characterized in that: The elastic body (24) is a spring, and the spring is sleeved on the shaft (220), and two ends of the spring respectively abut against the crown sleeve (22) and the top wall of the driving chamber (14).

8. A watch protective case for assisting electrocardiogram display according to claim 2, characterized in that: The knob member (2) further comprises a sealing ring (25); the housing (1) is designed to be sealed and waterproof; and the housing (1) is provided with a sealing cavity (15) at the outer side of the rotating hole (12); the shaft (220) can pass through the rotating hole (12) and the sealing cavity (15) in sequence; the sealing ring (25) is placed in the sealing cavity (15) and sleeved on the shaft (220); and the sealing ring (25) abuts against the shaft (220) and the inner wall of the sealing cavity (15).

9. A watch protective case for assisting electrocardiogram display according to claim 2, characterized in that: A plurality of anti-slip grooves (221) are arranged in a circumferential array on the inner wall of the crown sleeve (22) so as to closely fit the outer side wall of the crown (32).

10. A watch protective case for assisting electrocardiogram display according to claim 2, characterized in that: Anti-slip grooves (213) are provided on the circumferential side wall of the wheel button (21).

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