Button Structure and Wrist-Worn Device

Abstract

The present invention discloses a button structure and a wrist-worn device. The wrist-worn device includes a housing and an electrocardiogram sensor disposed inside the housing. The button structure includes a bushing, a conductive button, and a conductive elastic sheet. The bushing is inserted through the housing, and the bushing is provided with a shaft hole and a first limiting portion. The conductive button includes a rod portion movably inserted into the shaft hole and a cap portion exposed outside the housing. The conductive button is provided with a second limiting portion. The conductive elastic sheet is disposed in the cavity and electrically connected to the electrocardiogram sensor. Among them, the button structure has a first state in which it is separated from the conductive elastic sheet and a second state in which it is in contact with the conductive elastic sheet. The distance between the cap portion and the housing in the second state is greater than the distance between the cap portion and the housing in the first state. In the second state, the first limiting portion abuts against and limits the second limiting portion, and hinders the cap portion from moving closer to the housing. The button structure proposed by the present invention can improve the accuracy of electrocardiogram data acquisition.

Description

Technical Field

[0001] The present invention relates to the technical field of wearable intelligent devices, and particularly relates to a button structure and a wrist-worn device. Background Art

[0002] Smart wrist-worn devices such as smart watches and smart bracelets have been widely favored in the market at present. The number of users of smart wrist-worn devices is also steadily increasing. To meet the market development trend and the wearing needs of users, the functions related to users' sports health in wrist-worn devices are constantly innovating and iteratively upgrading. More and more smart wrist-worn devices are equipped with electrocardiogram detection functions. The basic principle of electrocardiogram detection is to simultaneously obtain the potential information of the user's right finger and left wrist through the electrocardiogram sensor in the smart wrist-worn device (when the smart wrist-worn device is worn on the user's left wrist), and obtain the electrocardiogram data of the user based on the potential information difference between the user's left arm and right arm.

[0003] In the related art, on the one hand, the electrocardiogram sensor in the smart wrist-worn device obtains the potential information of the user's left arm through the detection electrode at the bottom of the smart wrist-worn device. On the other hand, the electrocardiogram sensor also obtains the potential information of the user's right finger through the metal button in contact with the user's finger. Because the volume of the exposed part of the metal button is small, when the user's finger contacts the metal button, it is very easy to contact the metal shell of the smart wrist-worn device, which will cause the detection result of the electrocardiogram sensor to be inaccurate and even cause the electrocardiogram detection to fail. Summary of the Invention

[0004] The main purpose of the present invention is to propose a button structure and a wrist-worn device, aiming to improve the accuracy of the electrocardiogram data obtained by the wrist-worn device.

[0005] To achieve the above object, the present invention proposes a button structure applied to a wrist-worn device. The wrist-worn device includes a housing having a cavity and an electrocardiogram sensor disposed in the cavity. The housing is provided with a through hole communicating with the cavity. The button structure includes:

[0006] A bushing, the bushing is inserted through the through hole, and the bushing is provided with a shaft hole and a first limiting portion;

[0007] A conductive button, the conductive button includes a rod portion movably inserted through the shaft hole and a cap portion exposed outside the housing, and the conductive button is provided with a second limiting portion; and

[0008] A conductive elastic sheet, the conductive elastic sheet is disposed in the cavity and is electrically connected to the electrocardiogram sensor;

[0009] Wherein, the button structure has a first state of being disengaged from the conductive elastic sheet and a second state of being in contact with the conductive elastic sheet;

[0010] The distance between the cap portion and the outer shell in the second state is greater than the distance between the cap portion and the outer shell in the first state;

[0011] In the second state, the first limiting portion and the second limiting portion are in abutting and limiting contact, and prevent the cap portion from moving closer to the outer shell.

[0012] In an embodiment of the present invention, a cavity is formed by enclosing the bushing, the rod portion, and the cap portion, and the first limiting portion and the second limiting portion are located in the cavity;

[0013] The first limiting portion includes a connecting section connected to the bushing and a limiting section connected to the connecting section. The second limiting portion is provided on the outer peripheral wall of the rod portion, and the second limiting portion has two first guiding surfaces oppositely arranged;

[0014] In the first state, the limiting section is in abutting and limiting contact with one of the first guiding surfaces; in the second state, the limiting section is in abutting and limiting contact with the other first guiding surface.

[0015] In an embodiment of the present invention, the limiting section includes a deformation section and a check section;

[0016] Both ends of the deformation section are respectively connected to the connecting section and the check section. The deformation section extends towards the rod portion, and the check section extends in a direction away from the rod portion;

[0017] In the first state, the side of the deformation section facing away from the check section is in abutting and limiting contact with one of the first guiding surfaces; in the second state, the side of the check section facing away from the deformation section is in abutting and limiting contact with the other first guiding surface.

[0018] In an embodiment of the present invention, the connecting section surrounds the shaft hole, and the first limiting portion includes at least two limiting sections connected to the connecting section;

[0019] In the first state and the second state, one of the limiting sections is in abutting and limiting contact with different first guiding surfaces of the second limiting portion.

[0020] In an embodiment of the present invention, the conductive button further includes a conductive cap sleeved on one end of the rod portion away from the cap portion;

[0021] In the first state, the conductive cap is separated from the conductive elastic sheet;

[0022] In the second state, the conductive cap is in contact with the conductive elastic sheet and is in abutting and limiting contact with the periphery of the through hole.

[0023] In an embodiment of the present invention, an outer wall of the conductive cap is provided with an avoidance opening facing the conductive elastic piece, and a second guiding surface is formed on a side wall of the avoidance opening;

[0024] In the first state, at least a part of the structure of the conductive elastic piece is located in the avoidance opening;

[0025] In the second state, the conductive elastic piece contacts the second guiding surface or a periphery of the avoidance opening.

[0026] In an embodiment of the present invention, the key structure further includes an insulating gasket;

[0027] A limiting groove communicating with the through hole and the cavity is provided on a periphery of the through hole. The insulating gasket is received and limited in the limiting groove. The insulating gasket is provided with an opening, and the rod portion passes through the opening;

[0028] In the second state, the conductive cap abuts against and is limited by the insulating gasket.

[0029] In an embodiment of the present invention, an annular groove is provided on an outer wall of the rod portion, and the key structure further includes a sealing ring disposed in the annular groove. The sealing ring is in sliding abutment with an inner wall of the shaft hole.

[0030] To achieve the above object, the present invention further provides a wrist-worn device, which includes:

[0031] A housing, the housing is provided with a cavity and a through hole communicating with the cavity;

[0032] A wristband portion, the wristband portion is connected to the housing and is used to realize wearing and fixing of the housing; the above key structure, the shaft sleeve is inserted into the through hole; and

[0033] An electrocardiogram sensor, the electrocardiogram sensor is disposed in the cavity and is used to cooperate with the conductive key to realize electrocardiogram detection.

[0034] In an embodiment of the present invention, the wrist-worn device further includes a pressure sensor and a rotation sensor disposed in the cavity;

[0035] The pressure sensor is located on a side of the rod portion facing away from the cap portion and is used to detect a pressing operation of the conductive key;

[0036] The rotation sensor is located on a side of the rod portion facing away from the conductive elastic piece and is used to detect a rotation operation of the conductive key.

[0037] The technical solution of the present invention is to provide a sleeve on the outer shell of the wrist-worn device, and to provide a conductive button that can move along the axial hole of the sleeve in the sleeve, so that the rod of the conductive button is located in the axial hole, and the cap of the conductive button is located outside the outer shell, and a first limit portion is provided on the sleeve, and a second limit portion corresponding to the first limit portion is provided on the conductive button. When the electrocardiogram detection function of the wrist-worn device is not used, the conductive button is in the first state, the rod of the conductive button is separated from the conductive spring in the wrist-worn device, and the conductive button cannot be connected to the electrocardiogram sensor in the wrist-worn device through the conductive spring; when the electrocardiogram detection function of the wrist-worn device needs to be used, the user can turn the cap of the conductive button to move the cap in the direction away from the outer shell and drive the rod to move along the axial hole, at which time the rod directly or indirectly contacts and conducts with the conductive spring, and the conductive button enters the second state. In the second state, when the user's finger contacts the cap, the electrocardiogram sensor in the wrist-worn device can obtain the bioelectric signal transmitted from the user's finger through the conductive button and the conductive spring, and further obtain the corresponding electrocardiogram detection result. The conductive key moves along the shaft hole of the sleeve under the user's toggle operation, so that the conductive key switches between the first state and the second state. Because the second state is obtained by the conductive key moving in the direction away from the housing in the first state, the distance between the cap of the conductive key and the housing in the second state is greater than the distance between the cap and the housing in the first state. Therefore, when the conductive key realizes the electrocardiogram detection function in the second state, the distance between the cap of the conductive key and the housing of the wrist-worn device is larger, and there is a sufficiently wide interval between the cap of the conductive key and the housing of the wrist-worn device, which can effectively avoid the problem that the user puts his finger on the cap to touch the housing of the wrist-worn device during detection, resulting in inaccurate or even failed detection. In addition, in the second state, the first limiting portion on the sleeve also abuts against the second limiting portion on the conductive key, and the first limiting portion and the second limiting portion cooperate to prevent the cap from moving in the direction close to the housing, which allows the user's finger to apply a certain pressing force to the cap when performing electrocardiogram detection, so that the user's finger can be kept in a state of close contact with the cap without causing the conductive key to retract and move, which is conducive to improving the accuracy and reliability of the wrist-worn device during electrocardiogram detection. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0039] Figure 1 This is a schematic diagram of the structure of the key structure of the present invention in the first state;

[0040] Figure 2 Schematic diagram of the button structure of the present invention in the second state;

[0041] Figure 3 is Figure 1 exploded view of the button structure in

[0042] Figure 4 is Figure 1 schematic diagram of the first limiting portion in

[0043] Figure 5 is Figure 1 schematic diagram of the conductive button in

[0044] Figure 6 is Figure 1 schematic diagram of the conductive cap in

[0045] Explanation of the reference numerals in the drawings:

[0046] Label Name Label Name 1 Outer shell 222 Cap part 1a Through hole 223 Second limiting part 1b Limiting groove 2231 First guiding surface 2 Button structure 224 Conductive cap 21 Bushing 224a Avoidance opening 21a Shaft hole 2241 Second guiding surface 211 First limiting part 23 Conductive elastic sheet 2111 Connection section 24 Insulating gasket 2112 Limiting section 24a Opening 2113 Deformation section 25 Sealing ring 2114 Check valve section 2a Cavity 22 Conductive button 3 Pressure sensor 221 Rod part 4 Rotation sensor 221a Circular groove

[0047] The realization, functional features and advantages of the object of the present invention will be further described in conjunction with the embodiments with reference to the accompanying drawings. Detailed implementation manners

[0048] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0049] It should be noted that all the directional indications (such as up, down, left, right, front, back...) in the embodiments of the present invention are only used to explain the relative position relationship and movement conditions between components in a specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indications will also change accordingly.

[0050] In the present invention, unless otherwise clearly defined and limited, the terms "connection", "fixation", etc. shall be understood in a broad sense. For example, "fixation" may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the internal connection of two components or the interaction relationship between two components, unless otherwise clearly limited. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0051] In addition, in the present invention, descriptions such as "first" and "second" are only for descriptive purposes and should not be construed as indicating or implying their relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include at least one such feature. The meanings of "and / or" and "and / or" that appear throughout the text are the same, both indicating the inclusion of three parallel solutions. Taking "A and / or B" as an example, it includes solution A, or solution B, or a solution where both A and B are satisfied simultaneously. In addition, the technical solutions between various embodiments can be combined with each other, but it must be based on the ability of those of ordinary skill in the art to implement. When the combination of technical solutions results in contradictions or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0052] An embodiment of the present invention provides a key structure 2, combined with Figures 1 to 3 As shown, this key structure 2 is applied to wrist-worn devices such as smart watches and smart bracelets. The wrist-worn device includes a housing 1 having a cavity and an electrocardiogram sensor disposed in the cavity. The housing 1 is provided with a through hole 1a communicating with the cavity; the key structure 2 includes a bushing 21, a conductive key 22, and a conductive elastic sheet 23. The bushing 21 is inserted into the through hole 1a. The bushing 21 is provided with a shaft hole 21a and a first limiting portion 211; the conductive key 22 includes a rod portion 221 movably inserted into the shaft hole 21a and a cap portion 222 exposed outside the housing 1. The conductive key 22 is provided with a second limiting portion 223; the conductive elastic sheet 23 is disposed in the cavity and is electrically connected to the electrocardiogram sensor; wherein, the key structure 2 has a first state of being separated from the conductive elastic sheet 23 and a second state of being in contact with the conductive elastic sheet 23; the distance between the cap portion 222 and the housing 1 in the second state is greater than the distance between the cap portion 222 and the housing 1 in the first state; in the second state, the first limiting portion 211 abuts against and limits the second limiting portion 223, and hinders the cap portion 222 from moving closer to the housing 1.

[0053] In this embodiment, this wrist-worn device has an electrocardiogram detection function. An electrode electrically connected to the electrocardiogram sensor inside the housing 1 of the wrist-worn device is provided at the bottom of the housing 1. When the user wears the wrist-worn device on the left wrist, this electrode contacts the skin of the user's left wrist. When performing an electrocardiogram detection, the user's right finger contacts the cap portion 222 of the conductive key 22. The electrocardiogram sensor obtains the potential information of the user's left arm and right finger through the above-mentioned electrode, as well as the rod portion 221 and cap portion 222 of the conductive key 22, and obtains the electrocardiogram data of the user based on the difference between the potential information of the two.

[0054] The bushing 21 is inserted into the through hole 1a of the housing 1 of the wrist-worn device and can be hermetically connected to the housing 1 by screwing, bonding or other means to prevent external dust or moisture from entering the wrist-worn device through the space between the bushing 21 and the inner wall of the through hole 1a. At the same time, the bushing 21 also insulates and isolates the cap portion 222 and the rod portion 221 of the conductive button 22 from the housing 1 to avoid problems such as inaccurate detection results or detection failure when performing electrocardiogram detection through the conductive button 22 due to the contact between the conductive button 22 and the metal housing 1. One end of the bushing 21 is inserted into the through hole 1a, and the other end extends out of the through hole 1a and at least part of the structure is located between the cap portion 222 and the housing 1, separating the cap portion 222 from the housing 1 to prevent the cap portion 222 from contacting the housing 1. A shaft hole 21a is formed in the bushing 21, and the shaft hole 21a can be arranged along the extending direction of the through hole 1a, so that the shaft hole 21a and the through hole 1a have a high coaxiality, reducing the processing and assembly difficulty of the insulating housing 1, the bushing 21 and the conductive button 22, and improving the assembly efficiency of the insulating housing 1, the bushing 21 and the conductive button 22. The material of the bushing 21 can be an insulating material such as polycarbonate or polyvinyl chloride resin.

[0055] The rod portion 221 of the conductive button 22 is inserted into the shaft hole 21a of the bushing 21 and can move along the shaft hole 21a. For example, the rod portion 221 has a clearance fit with the inner wall of the shaft hole 21a; the cap portion 222 of the conductive button 22 is located outside the shaft hole 21a and the housing 1, and the cap portion 222 and the rod portion 221 can be an integrally formed structure, and the conductive button 22 can be made by a two-color injection molding process using two different materials. Exemplarily, the outer wall of the conductive button 22 facing away from the bushing 21 and the housing 1, and the rod core connected to the outer wall are made of conductive materials; while the inner wall of the conductive button 22 facing the bushing 21 and the housing 1 is made of insulating materials; the outer wall and the rod core of the conductive button 22 can transmit the electrical signal on the user's finger to the electrocardiogram sensor, and at the same time, by using the insulating property of the inner wall of the conductive button 22, the insulation isolation between the missile button and the housing 1 and the bushing 21 can be achieved.

[0056] The first limiting part 211 is arranged at one end of the bushing 21 close to the cap part 222, and the second limiting part 223 is arranged on the rod part 221 or the cap part 222 of the conductive button 22 and is used for limiting cooperation with the first limiting part 211. As an example, the first limiting part 211 is an elastic buckle arranged on the bushing 21, and the elastic buckle has a limiting end with a triangular or V-shaped cross-sectional shape. The second limiting part 223 is a V-shaped groove arranged on the outer peripheral wall of the rod part 221 of the conductive button 22. In the above first state, the limiting end of the elastic buckle is separated from the V-shaped groove. In the above second state, the limiting end of the elastic buckle slides into the V-shaped groove and is clamped with the V-shaped groove. The user realizes the switching between the first state and the second state of the above button structure 2 by pulling or pushing the conductive button 22 outwards or inwards to make the limiting end of the elastic buckle be clamped with or separated from the V-shaped groove. As another example, the cap part 222 of the conductive button 22 is provided with the above elastic buckle, and the bushing 21 is provided with the above V-shaped groove. Similarly, by means of the cooperation of the elastic buckle and the V-shaped groove, by pulling or pushing the conductive button 22 outwards or inwards, the switching between the first state and the second state of the button structure 2 can be realized. It can be understood that because the conductive button 22 is separated from the conductive elastic sheet 23 in the first state, the conductive button 22 is not electrically connected to the electrocardiogram sensor. At this time, the wrist-worn device is correspondingly in a non-electrocardiogram detection state. In the second state, the conductive button 22 is in contact with the conductive elastic sheet 23, and the conductive button 22 is electrically connected to the electrocardiogram sensor through the conductive elastic sheet 23. At this time, the wrist-worn device is correspondingly in an electrocardiogram detection state.

[0057] The conductive elastic sheet 23 can be connected to the electrocardiogram sensor through a flexible flat cable, and the conductive elastic sheet 23 can be fixed on the circuit module of this wrist-worn device by means of welding, bonding, etc., such as fixed on a circuit board. The conductive elastic sheet 23 can be arranged on the periphery of the conductive button 22, such as above or below the conductive button 22. By virtue of the deformable characteristic of the conductive elastic sheet 23, the conductive elastic sheet 23 can be pressed against one end of the conductive button 22 located in the cavity when the conductive button 22 moves. In this way, it can be ensured that when performing electrocardiogram detection, the conductive button 22 can be reliably electrically connected to the electrocardiogram sensor through the conductive elastic sheet 23.

[0058] In this embodiment, a sleeve 21 is provided on the housing 1 of the wrist-worn device, and a conductive button 22 is provided in the sleeve 21 so as to be movable along the shaft hole 21a of the sleeve 21, so that the rod portion 221 of the conductive button 22 is located in the shaft hole 21a, and the cap portion 222 of the conductive button 22 is located on the outside of the housing 1, and a first limiting portion 211 is provided on the sleeve 21, and a second limiting portion 223 corresponding to the first limiting portion 211 is provided on the conductive button 22. When the electrocardiogram detection function of the wrist-worn device is not used, the conductive button 22 is in the first state, the rod 221 of the conductive button 22 is separated from the conductive spring 23 in the wrist-worn device, and the conductive button 22 cannot be connected to the electrocardiogram sensor in the wrist-worn device through the conductive spring 23; when the electrocardiogram detection function of the wrist-worn device needs to be used, the user can turn the cap 222 of the conductive button 22 to move the cap 222 away from the housing 1 and drive the rod 221 to move along the shaft hole 21a, at which time the rod 221 directly or indirectly contacts and conducts with the conductive spring 23, and the conductive button 22 enters the second state. In the second state, when the user's finger contacts the cap 222, the electrocardiogram sensor in the wrist-worn device can obtain the bioelectric signal transmitted from the user's finger through the conductive button 22 and the conductive spring 23, and further obtain the corresponding electrocardiogram detection result. The conductive button 22 moves along the axial hole 21a of the sleeve 21 under the user's toggling operation, so that the conductive button 22 switches between the first state and the second state. Because the second state is obtained by the conductive button 22 moving in the direction away from the shell 1 in the first state, the distance between the cap 222 of the conductive button 22 and the shell 1 in the second state is greater than the distance between the cap and the shell 1 in the first state. Therefore, when the conductive button 22 realizes the electrocardiogram detection function in the second state, the distance between the cap 222 of the conductive button 22 and the shell 1 of the wrist-worn device is larger, and there is a sufficiently wide spacing space between the cap 222 of the conductive button 22 and the shell 1 of the wrist-worn device, which can effectively avoid the problem that the user puts his finger on the cap 222 for detection and touches the shell 1 of the wrist-worn device, resulting in inaccurate or even failed detection. In addition, in the second state, the first limit portion 211 on the sleeve 21 also abuts against the second limit portion 223 on the conductive button 22 for limit, and the first limit portion 211 and the second limit portion 223 cooperate to prevent the cap portion 222 from moving toward the direction close to the shell 1. This allows the user's fingers to apply a certain pressing force to the cap portion 222 when performing an electrocardiogram test, allowing the user's fingers to remain in close contact with the cap portion 222 without causing the conductive button 22 to retract and move, which is beneficial to improving the accuracy and reliability of the wrist-worn device when performing an electrocardiogram test.

[0059] In one embodiment of the present invention, Figure 1 , Figure 2 as well as Figure 4As shown, the above-mentioned sleeve 21, rod portion 221 and cap portion 222 enclose a cavity 2a, and the first limiting portion 211 and the second limiting portion 223 are located in the cavity 2a; the first limiting portion 211 includes a connecting section 2111 connected to the sleeve 21 and a limiting section 2112 connected to the connecting section 2111, and the second limiting portion 223 is arranged on the outer peripheral wall of the rod portion 221, and the second limiting portion 223 has two first guide surfaces 2231 arranged opposite to each other; in the first state, the limiting section 2112 abuts against a first guide surface 2231 for limiting; in the second state, the limiting section 2112 abuts against another first guide surface 2231 for limiting.

[0060] In this embodiment, a first groove is provided on the side of the sleeve 21 facing the cap 222, and a second groove is provided on the side of the cap 222 facing the sleeve 21, and the first groove and the second groove are connected to form the above-mentioned cavity 2a; or, only one of the first groove and the second groove is retained, and the other is removed, such as only the first groove is provided on the sleeve 21, and the cap 222 and the inner wall of the first groove are enclosed to form the above-mentioned cavity 2a; the cavity 2a is located on the outside of the housing 1. In this embodiment, by disposing the first limiting portion 211 and the second limiting portion 223 in the cavity 2a, the first limiting portion 211 and the second limiting portion 223 are isolated and protected by the cavity 2a space enclosed by the sleeve 21 and the cap 222, so as to avoid the first limiting portion 211 and the second limiting portion 223 from being damaged or eroded by external water vapor, which is conducive to prolonging the service life of the first limiting portion 211 and the second limiting portion 223.

[0061] The connecting section 2111 and the limiting section 2112 of the first limiting portion 211 may be an integrally formed structure, and the connecting section may be connected to the shaft sleeve 21 by welding or bonding. The limiting section 2112 and the connecting section 2111 may be arranged at an angle, such as a 45 degree angle. The end of the limiting section 2112 away from the connecting section 2111 may be a straight section extending in a straight line, or may be a bent section, which is not limited here.

[0062] The second limiting portion 223 is a protrusion or a groove provided on the rod portion 221. When the second limiting portion 223 is a protrusion, its cross-sectional shape can be a triangle, and the two opposite side surfaces on the outer surface of the second limiting portion 223 are both inclined surfaces, which are the first guide surface 2231 and the second guide surface 2241 mentioned above; when the second limiting portion 223 is a groove, it can be a trapezoidal groove, and the second limiting portion 223 has two inclined side walls arranged opposite to each other, and the wall surfaces of the two inclined side walls are the first guide surface 2231 and the second guide surface 2241 mentioned above. Figure 1 , Figure 2 , Figure 5 as well as Figure 6As shown, in the first state, one side of the limiting section 2112 facing the connecting section 2111 abuts against a first guiding surface 2231 of the second limiting portion 223 (as Figure 1 shown); in the second state, the side of the limiting section 2112 facing away from the connecting section 2111 abuts against another first guiding surface 2231 of the second limiting portion 223 (as Figure 2 shown); when the second limiting portion 223 is a groove, in the first state, the side of the limiting section 2112 facing the connecting section 2111 abuts against the first guiding surface 2231 on the second limiting portion 223 close to the through hole 1a; in the second state, the side of the limiting section 2112 facing away from the connecting section 2111 abuts against the first guiding surface 2231 on the second limiting portion 223 away from the through hole 1a.

[0063] In this embodiment, by providing the first guiding surface 2231 and the second guiding surface 2241 on the second limiting portion 223, and using the guiding and limiting cooperation of the first guiding surface 2231 and the second guiding surface 2241 on the limiting section 2112 of the first limiting portion 211, the tightness and reliability of the cooperation between the first limiting portion 211 and the second limiting portion 223 can be improved, so that the button structure 2 can stably and reliably switch between the first state and the second state. Among them, the first guiding surface 2231 and the second guiding surface 2241 can be arc surfaces in addition to the above-mentioned inclined surfaces.

[0064] In an embodiment of the present invention, in combination with Figure 1 、 Figure 2 and Figure 4 shown, the above-mentioned limiting section 2112 includes a deformation section 2113 and a check section 2114; both ends of the deformation section 2113 are respectively connected to the connecting section 2111 and the check section 2114, the deformation section 2113 extends towards the rod portion 221, and the check section 2114 extends towards the direction away from the rod portion 221; in the first state, the side of the deformation section 2113 facing away from the check section 2114 abuts against and is limited by a first guiding surface 2231; in the second state, the side of the check section 2114 facing away from the deformation section 2113 abuts against and is limited by another first guiding surface 2231.

[0065] In this embodiment, the connecting section 2111, the deformation section 2113, and the check section 2114 can be an integrally formed structure. The deformation section 2113 and the check section 2114 extend in the above-mentioned orientation, so that the extension directions of the deformation section 2113 and the check section 2114 form an angle. At this time, the deformation section 2113 and the check section 2114 cooperate to form a U-shaped or V-shaped structure. In this way, in the second state, the check section 2114 abuts and is limited against the first guiding surface 2231 facing the through hole 1a on the upper surface of the second limiting portion 223, so that the check section 2114 abuts against the first guiding surface 2231, and a resistance is applied to the retraction movement of the rod portion 221 of the conductive button 22 along the shaft hole 21a towards the through cavity. This effectively avoids the problem that when the user's finger touches the cap portion 222 of the conductive button 22 during the electrocardiogram detection, the cap portion 222 is prone to displacement, and the user's finger cannot be closely attached to the cap portion 222, resulting in inaccurate electrocardiogram detection results or detection failure.

[0066] In this embodiment, the length of the deformation section 2113 is greater than the length of the check section 2114, so that the deformation part is more likely to generate elastic deformation, and the check section 2114 is less likely to generate elastic deformation; the connection part between the check section 2114 and the deformation section 2113 is a bent structure, and its structural rigidity is also relatively strong. In this way, when the first limiting portion 211 enables the conductive button 22 to move along the shaft hole 21a through the elastic deformation of the first deformation part, the check portion can slide along the first guiding surface 2231 and the second guiding surface 2241 of the second limiting portion 223 to realize the switching of the button structure 2 between the first state and the second state. In addition, the stronger rigidity of the check section 2114 and the connection part between the check section 2114 and the deformation part is also beneficial to the reliable fixation of the conductive button 22 in the second state, ensuring that the user's finger can be closely attached to the cap portion 222 of the conductive button 22 for electrocardiogram detection, thereby improving the accuracy and reliability of electrocardiogram detection by the wrist-worn device adopting the button structure 2.

[0067] In an embodiment of the present invention, in combination with Figure 1 , Figure 2 and Figure 4 as shown, the above-mentioned connecting section 2111 is arranged around the shaft hole 21a, and the first limiting portion 211 includes at least two limiting sections 2112 connected to the connecting section 2111; in the first state and the second state, a limiting section 2112 abuts and is limited against different first guiding surfaces 2231 of the second limiting portion 223 respectively.

[0068] In this embodiment, the connecting section 2111 can be an annular structure. One end of the shaft sleeve 21 facing the cap portion 222 can be provided with a groove, the shaft hole 21a penetrates the bottom wall of the groove, and the connecting section 2111 can be fixed to the bottom wall of the groove by welding or bonding, etc., and the connecting section 2111 is arranged around the outer periphery of the through hole 1a without blocking the through hole 1a.

[0069] At least two limiting segments 2112 are provided on the side of the connecting portion facing away from the through hole 1a, and each limiting segment 2112 can be integrally formed with the connecting segment 2111. When the number of limiting segments 2112 is two, the two limiting segments 2112 can be symmetrically arranged on the connecting segment 2111; when the number of limiting segments 2112 is multiple, the multiple limiting segments 2112 can be arranged around the through hole 1a. Each limiting segment 2112 can adopt the structure in the previous embodiment, that is, each limiting segment 2112 includes the above-mentioned deformation segment 2113 and the check segment 2114.

[0070] In this embodiment, by providing at least two limiting segments 2112 on the connecting segment 2111, and each limiting segment 2112 is in limiting cooperation with the same second limiting portion 223 on the rod portion 221, when the key structure 2 switches between the first state and the second state, it can more stably and reliably maintain the first state or the second state, thereby improving the reliability of the key structure 2 during use.

[0071] In an embodiment of the present invention, in combination with Figure 1 and Figure 2 as shown, the above-mentioned conductive key 22 further includes a conductive cap 224 sleeved on one end of the rod portion 221 away from the cap portion 222; in the first state, the conductive cap 224 is separated from the conductive elastic sheet 23; in the second state, the conductive cap 224 is in contact with the conductive elastic sheet 23 and abuts against the periphery of the through hole 1a for limiting.

[0072] In this embodiment, the conductive cap 224 can be sleeved on one end of the rod portion 221 extending into the cavity by means of screwing or the like. In the second state, on the one hand, the conductive cap 224 transmits the electrical signal on the rod portion 221 to the conductive elastic sheet 23 and the electrocardiogram sensor to realize the corresponding electrocardiogram detection function; on the other hand, the conductive cap 224 is in limiting cooperation with the periphery of the through hole 1a to prevent the rod portion 221 of the conductive key 22 from slipping out of the shaft hole 21a when moving towards the outside of the housing 1, so as to ensure the reliability of the key structure 2 during use.

[0073] In an embodiment of the present invention, in combination with Figure 1 , Figure 2 and Figure 6 as shown, the outer wall of the above-mentioned conductive cap 224 is provided with an avoidance port 224a with an opening facing the conductive elastic sheet 23, and a second guiding surface 2241 is formed on the side wall of the avoidance port 224a; in the first state, at least part of the structure of the conductive elastic sheet 23 is located in the avoidance port 224a; in the second state, the conductive elastic sheet 23 is in contact with the second guiding surface 2241 or the periphery of the avoidance port 224a.

[0074] In this embodiment, the conductive elastic sheet 23 is located on one side of the conductive cap 224, such as above or below the conductive cap 224. The opening of the avoidance port 224a on the conductive cap 224 faces the missile sheet. In the first state, at least part of the structure of the conductive elastic sheet 23 is located within the avoidance port 224a and does not contact the side wall of the avoidance port 224a. At this time, the conductive cap 224 is separated from the conductive elastic sheet 23, and the conductive button 22 and the conductive elastic sheet 23 are in a non-conductive state. In the second state, because the conductive button 22 moves in a direction away from the cavity, the relative position between the avoidance port 224a and the conductive elastic sheet 23 changes, and the second guiding surface 2241 of the avoidance port 224a gradually approaches and contacts the conductive elastic sheet 23. At this time, the conductive button 22 and the conductive elastic sheet 23 are in a contact and conductive state. In this embodiment, by providing the avoidance port 224a on the conductive cap 224 to accommodate the conductive elastic sheet 23 and cooperate with it in contact or separation, it is beneficial to realize the compact arrangement of the conductive cap 224 and the conductive elastic sheet 23, reduce the volume of the button structure 2, and can reduce the material cost of the conductive cap 224. For the convenience of processing the avoidance port 224a, the avoidance port 224a can also be arranged to extend circumferentially along the outer peripheral wall of the conductive cap 224.

[0075] In an embodiment of the present invention, in combination with Figure 2 and Figure 3 as shown, the above-mentioned button structure 2 further includes an insulating gasket 24; a limiting groove 1b communicating with the through hole 1a and the cavity is provided on the periphery of the through hole 1a. The insulating gasket 24 is accommodated and limited within the limiting groove 1b. The insulating gasket 24 is provided with an opening 24a, and the rod portion 221 passes through the opening 24a; in the second state, the conductive cap 224 abuts and is limited by the insulating gasket 24.

[0076] In this embodiment, the limiting groove 1b is provided on the side wall of the cavity close to the through hole 1a, and the limiting groove 1b is used to accommodate and limit the insulating gasket 24. The insulating gasket 24 is provided with an opening 24a corresponding to the shaft hole 21a of the shaft sleeve 21. The rod portion 221 of the conductive button 22 passes through the opening 24a to be connected to the conductive cap 224. The insulating gasket 24 is used to realize the insulating isolation between the conductive cap 224 and the housing 1. In this embodiment, by providing the insulating gasket 24 on the periphery of the through hole 1a, when the conductive button 22 moves along the shaft hole 21a to make the button structure 2 enter the second state, the conductive cap 224 is isolated by the insulating gasket 24 and will not contact the housing 1. In this way, the problem that the conductive cap 224 is conducted with the metal housing 1, resulting in inaccurate detection results when performing electrocardiogram detection through the conductive button 22, is avoided, so that the wrist-worn device using the button structure 2 can more accurately realize electrocardiogram detection.

[0077] In an embodiment of the present invention, in combination with Figure 1 , Figure 2 and Figure 5As shown, a ring groove 221a is provided on the outer wall of the rod portion 221. The button structure 2 further includes a sealing ring 25 disposed in the ring groove 221a, and the sealing ring 25 is in sliding contact with the inner wall of the shaft hole 21a.

[0078] In this embodiment, the sealing ring 25 is used to achieve a sealed fit between the rod portion 221 of the conductive button 22 and the inner wall of the shaft sleeve 21, so as to prevent external dust or moisture from entering the cavity through the space between the rod portion 221 and the inner wall of the shaft sleeve 21, which may affect the normal operation of the electronic components in this wrist-worn device, thereby improving the safety and reliability of the wrist-worn device using the button structure 2 during operation.

[0079] An embodiment of the present invention also provides a wrist-worn device, which combines Figure 1 and Figure 2 As shown, the wrist-worn device includes a housing 1, a wristband portion, an electrocardiogram sensor, and the button structure 2 in the above embodiment. The housing 1 is provided with a cavity and a through hole 1a communicating with the cavity; the wristband portion is connected to the housing 1 and is used to fix the wearing of the housing 1. For example, when the wrist-worn device is a smart watch, the wristband portion is a watch band; the shaft sleeve 21 is inserted into the through hole 1a, and the electrocardiogram sensor is disposed in the cavity and is used to cooperate with the conductive button 22 to achieve electrocardiogram detection.

[0080] In this embodiment, the wrist-worn device has an electrocardiogram detection function. An electrode electrically connected to the electrocardiogram sensor inside the housing 1 of the wrist-worn device is provided at the bottom of the housing 1. When the user wears the wrist-worn device on the left wrist, the electrode contacts the skin of the user's left wrist. During electrocardiogram detection, the user's right finger contacts the cap portion 222 of the conductive button 22, and the electrocardiogram sensor obtains the potential information of the user's left arm and right finger through the above electrode, the rod portion 221, and the cap portion 222 of the conductive button 22, and obtains the electrocardiogram data of the user based on the difference between the two potential information. The specific structure of the button structure 2 in this embodiment refers to the above embodiment. Since this wrist-worn device adopts all the technical solutions of the above all embodiments, it has at least all the beneficial effects brought by the technical solutions of the above embodiments, which will not be elaborated here one by one.

[0081] In an embodiment of the present invention, the wrist-worn device further includes a pressure sensor 3 and a rotation sensor 4 disposed in the cavity; the pressure sensor 3 is located on the side of the rod portion 221 facing away from the cap portion 222 and is used to detect the pressing operation of the conductive button 22; the rotation sensor 4 is located on the side of the rod portion 221 facing away from the conductive elastic piece 23 and is used to detect the rotation operation of the conductive button 22.

[0082] In this embodiment, when the conductive button 22 is pressed, the conductive button 22 moves along the shaft hole 21a into the cavity, and the rod portion 221 of the conductive button 22 contacts the pressure sensor 3. The pressure sensor 3 is triggered and sends a corresponding electrical signal to the control chip for data processing in the wrist-worn device. The control chip controls the display screen of the wrist-worn device to display corresponding image information based on this electrical signal. When the conductive button 22 is rotated, the rotation sensor 4 detects the angular displacement of the rod portion 221 of the conductive button 22 and sends a corresponding electrical signal to the above-mentioned control chip. The control chip controls the display screen of the wrist-worn device to display corresponding image information based on this electrical signal, thereby realizing the operation interaction function of the physical button of this wrist-worn device. The pressure sensor 3 can be a contact sensor, and the rotation sensor 4 can be an angle sensor or a displacement sensor.

[0083] The above are only the optional embodiments of the present invention, and do not limit the patent scope of the present invention accordingly. Any equivalent structural transformation made under the inventive concept of the present invention by using the content of the specification and drawings of the present invention, or any direct / indirect application in other related technical fields is included in the patent protection scope of the present invention.

Claims

1. A button structure is applied to a wrist-worn device. The wrist-worn device includes a housing having a cavity and an electrocardiogram sensor disposed in the cavity. The housing is provided with a through hole communicating with the cavity. It is characterized in that, The described key structure includes: A bushing, which is inserted into the through hole. The bushing is provided with a shaft hole and a first limiting portion. A conductive key, which includes a rod portion movably inserted into the shaft hole and a cap portion exposed outside the housing. The conductive key is provided with a second limiting portion. And A conductive elastic sheet, which is arranged in the cavity and electrically connected to the electrocardiogram sensor. Wherein, the key structure has a first state of being separated from the conductive elastic sheet and a second state of being in contact with the conductive elastic sheet. The distance between the cap portion and the housing in the second state is greater than the distance between the cap portion and the housing in the first state. In the second state, the first limiting portion abuts against and limits the second limiting portion, and hinders the cap portion from moving closer to the housing.

2. The key structure according to claim 1, characterized in that, The bushing, the rod portion and the cap portion enclose a cavity, and the first limiting portion and the second limiting portion are located in the cavity. The first limiting portion includes a connecting section connected to the bushing and a limiting section connected to the connecting section. The second limiting portion is arranged on the outer peripheral wall of the rod portion, and the second limiting portion has two first guiding surfaces arranged oppositely. In the first state, the limiting section abuts against and limits one of the first guiding surfaces. In the second state, the limiting section abuts against and limits the other first guiding surface.

3. The key structure according to claim 2, characterized in that, The limiting section includes a deformation section and a check section. Both ends of the deformation section are respectively connected to the connecting section and the check section. The deformation section extends towards the rod portion, and the check section extends in a direction away from the rod portion. In the first state, the side of the deformation section facing away from the check section abuts against and limits one of the first guiding surfaces. In the second state, the side of the check section facing away from the deformation section abuts against and limits the other first guiding surface.

4. The key structure according to claim 2, wherein The connecting section surrounds the shaft hole, and the first limiting portion includes at least two limiting sections connected to the connecting section. In the first state and the second state, one of the limiting sections respectively abuts against and limits different first guiding surfaces of the second limiting portion.

5. The key structure according to any one of claims 1 to 4, characterized in that, The conductive key further includes a conductive cap sleeved on one end of the rod portion away from the cap portion. In the first state, the conductive cap is separated from the conductive elastic sheet. In the second state, the conductive cap is in contact with the conductive elastic sheet and abuts against and limits the periphery of the through hole.

6. The key structure according to claim 5, wherein, The outer wall of the conductive cap is provided with an avoidance opening with an opening facing the conductive elastic sheet, and the side wall of the avoidance opening forms a second guiding surface. In the first state, at least part of the structure of the conductive elastic sheet is located in the avoidance opening. In the second state, the conductive elastic sheet is in contact with the second guiding surface or the periphery of the avoidance opening.

7. The key structure according to claim 5, characterized in that The key structure further includes an insulating gasket. A limiting groove communicating with the through hole and the cavity is provided on the periphery of the through hole. The insulating gasket is received and limited in the limiting groove. The insulating gasket is provided with an opening, and the rod portion passes through the opening. In the second state, the conductive cap abuts against and limits the insulating gasket.

8. The key structure according to any one of claims 1 to 4, characterized in that, The outer wall of the rod portion is provided with an annular groove, and the key structure further includes a sealing ring disposed in the annular groove, and the sealing ring is in sliding contact with the inner wall of the shaft hole.

9. A wrist-worn device, characterized in that, The wrist-worn device includes: a housing having a cavity and a through hole communicating with the cavity; a wristband portion connected to the housing and configured to achieve wearing and fixing of the housing; the key structure according to any one of claims 1 to 8, wherein the shaft sleeve is disposed through the through hole; and an electrocardiogram sensor disposed in the cavity and configured to cooperate with the conductive key to achieve electrocardiogram detection.

10. The wrist-worn device according to claim 9, characterized in that, The wrist-worn device further includes a pressure sensor and a rotation sensor disposed in the cavity; the pressure sensor is located on a side of the rod portion facing away from the cap portion and configured to detect a pressing operation of the conductive key; the rotation sensor is located on a side of the rod portion facing away from the conductive elastic piece and configured to detect a rotation operation of the conductive key.

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