Method for manufacturing a wrist strap with multiple sets of embedded electrode sheets

Abstract

The present invention discloses a method for manufacturing a wrist strap with multiple groups of embedded electrode sheets. The method comprises the following steps: firstly, placing the multiple electrode sheets in corresponding mold cavities and injecting liquid silicone. The liquid silicone forms a strap main body after cooling. Then, multiple conducting pins provided on an FPC assembly are embedded into holes at the rear end of the electrode sheets. The FPC assembly is naturally bent and fits the outer side surface of the strap main body. Finally, the strap main body, electrode sheets and FPC assembly connected as one are placed in another corresponding mold cavity. Liquid silicone is injected for a second time. The liquid silicone injected for the second time forms a sealing belt after cooling, thereby completing the manufacture of the wrist strap. The present invention provides a method for manufacturing a strap that can take into account both metal electrodes and silicone electrodes, thereby ensuring that the electrodes are firm and do not fall off when worn. Each electrode is closely attached to the skin through the electrode strap, thereby effectively preventing the wires from being entangled or broken, thereby extending the life of the wires. At the same time, a quick installation connection between the electrodes and the host is achieved, and the interface after the strap and the host are assembled is ensured to be waterproof.

Description

Technical Field

[0001] The present invention relates to the technical field of medical devices, and in particular to a method for manufacturing a wrist strap with multiple groups of electrode sheets embedded therein. Background Art

[0002] Biomedical electrodes are generally divided into detection electrodes and electrical stimulation electrodes. Physical and chemical changes within the body cause uneven distribution of positive and negative charges across the organism, resulting in varying electrical potentials within different parts of the body, or within and outside cells. To measure the electrical potential at different sites, electrodes are used to direct the potential at those sites to a potential measuring instrument for measurement. These electrodes are called detection electrodes. Detection electrodes are sensitive components used to measure biopotentials, such as electrocardiogram (ECG) electrodes.

[0003] Stimulating electrodes are electrodes used to apply current or voltage to a living organism. They are actuators used in three main areas: 1. To study the conduction and response patterns of excitable tissue; 2. To introduce external current into a living organism to treat a disease; and 3. To control or replace certain functions of a living organism, such as electrodes used clinically to treat neuropathology.

[0004] In existing wearable medical devices, particularly wrist-worn devices, electrodes are typically embedded in the bottom of the device, typically accommodating only one or two electrodes. Devices requiring multiple electrodes typically require external wiring, limiting the space available and hindering component placement. Externally connecting electrodes via wiring harnesses is time-consuming and inconvenient, requiring cleaning after each use, creating a negative user experience.

[0005] Electrode pads are generally consumables and need to be replaced regularly. For wrist-worn medical devices that require multiple electrode pads to work together, being able to integrate the electrode pads into one through mature manufacturing processes and being able to quickly disassemble and install them with the host has become an urgent problem that needs to be solved for wrist-worn medical devices. Summary of the Invention

[0006] The object of the present invention is to provide a method for manufacturing a wristband with multiple sets of embedded electrode sheets, which solves the problems in the above-mentioned background technology.

[0007] To achieve the above object, the present invention provides the following technical solution: a method for manufacturing a wrist strap with multiple sets of embedded electrode sheets, wherein the wrist strap comprises electrode sheets, a strap body, an FPC assembly and a sealing tape.

[0008] S1: Select an electrode sheet, which can be a metal electrode sheet or a silicone electrode sheet;

[0009] S2: placing multiple electrode sheets in corresponding mold cavities and injecting liquid silicone into the mold. After the liquid silicone cools, it forms a belt body. The peripheral sides of the multiple electrode sheets are all covered and fixed by the belt body, and the contact surfaces of the multiple electrode sheets are slightly raised on the inner side of the belt body.

[0010] S3: The FPC assembly includes an FPC flexible cable and an upper cover plate. The starting end of the FPC flexible cable is adapted to the upper cover plate, and the upper cover plate is covered on the FPC flexible cable. A boss is provided on each side of the upper surface of the upper cover plate. Both bosses are provided with multiple mounting holes. Each mounting hole is provided with a plug-in type PIN needle, and the plug-in type PIN needle passes through the upper cover plate. The starting end of the FPC flexible cable is provided with an insertion hole adapted to the plug-in type PIN needle. The tail ends of the multiple plug-in type PIN needles are respectively inserted into the multiple insertion holes and fixed by welding. The inner side of the FPC flexible cable is provided with solder pads corresponding to the number of electrode sheets, and each solder pad is welded with two conduction pins;

[0011] S4: Two holes adapted for the conducting pins are retained on the back side of each electrode sheet, and the two conducting pins are embedded in the multiple holes in a one-to-one correspondence, and the FPC assembly is naturally bent and fits the outer side of the strap body;

[0012] S5: Place the integrated strap body, electrode sheet and FPC assembly in another corresponding mold cavity, and inject liquid silicone for the second time. The liquid silicone injected for the second time forms a sealing tape after cooling. The sealing tape and the strap body cover the FPC assembly. The sealing tape has two openings adapted to the bosses. The two bosses pass through the two openings in a one-to-one correspondence. The fitting surfaces of the multiple electrode sheets are slightly raised on the inner side of the strap body, completing the production of the wrist strap.

[0013] In the present invention, the upper cover plate is provided with a mold opening, an identification ID chip is embedded in the mold opening, and the identification ID chip is electrically connected to the FPC flexible cable.

[0014] In the present invention, each boss is provided with two magnet mounting holes, which are respectively located on both sides of the plug-in PIN pin. The bottom of the magnet mounting hole is glued with glue and then a magnet is embedded therein, and the upper surface of the magnet is flush with the upper surface of the sealing tape.

[0015] In the present invention, the electrode sheet is a metal electrode sheet, which includes a conductive metal sheet and a rubber coating layer. A plurality of small holes are provided on the circumference of the conductive metal sheet. After the conductive metal sheet is placed in a special mold cavity, liquid glue is injected. The liquid glue can flow into the small holes. After cooling, the conductive metal sheet and the rubber coating layer can be firmly connected. The rubber coating layer has a hole position adapted for the conductive needle. After the conductive needle is buckled into the hole position of the rubber coating layer, it is elastically contacted and connected with the conductive metal sheet.

[0016] In the present invention, the electrode sheet is a silicone electrode sheet. Hot-melt silicone mixed with electroplated graphite is injected into a special mold cavity. After the hot-melt silicone is cooled, a silicone electrode sheet is formed. The silicone electrode sheet has a hole that is compatible with the conductive needle, and the diameter of the hole is slightly smaller than the diameter of the conductive needle. After the conductive needle is buckled into the hole of the silicone electrode sheet, an interference fit is formed to fix it.

[0017] In the present invention, the fitting surface of the electrode sheet can be a curved surface or a flat surface, and the fitting surface can be set according to ergonomics, wherein the curvature of the fitting surface is set according to the portion in contact with the user.

[0018] In the present invention, a circle of raised portions is provided on the upper surface of the sealing belt. The raised portions are in an annular closed shape and surround the two bosses.

[0019] In the present invention, the plug-in type PIN pin and the conducting pin for the metal electrode sheet are pogopin spring guide pins.

[0020] In the present invention, the conducting needle used for the silicone electrode sheet is a non-spring conducting needle.

[0021] Compared with the prior art, the present invention has the following beneficial effects:

[0022] 1. The present invention places the electrode sheet in the corresponding mold cavity and injects liquid silicone. After the liquid silicone cools, it forms a belt body, so that the electrode sheet and the belt body are tightly connected. After the FPC component is installed and fixed on the outer side of the belt body, it is placed in another corresponding mold cavity and liquid silicone is injected a second time to form a sealing belt. The sealing belt is connected to the belt body and covers the FPC component. The boss and the plug-in PIN needle and magnet on the boss are located on the upper surface of the sealing belt. The two boss sides are tightly connected to the sealing belt. Through secondary injection molding, the FPC component and the electrode sheet achieve a better packaging effect.

[0023] 2. When the present invention uses a metal electrode sheet, a rubber coating layer is provided to cover the outside of the conductive metal sheet to solve the problem that the metal sheet and the liquid silicone cannot be well bonded during injection, so that the connection between the electrode sheet and the strap body is more firmly connected, thereby improving the service life.

[0024] 3. The present invention uses the conductive needle to elastically contact the conductive metal sheet to reduce welding and achieve stable electrical conduction.

[0025] 4. The present invention reduces welding and achieves stable electrical conduction by using interference fit and covering connection between the conducting needle and the hole of the conductive silicone sheet.

[0026] 5. The present invention provides a raised portion, and an annular groove is provided at the bottom of the fixed host used in conjunction with the wrist strap. The raised portion is embedded in the annular groove, which can effectively improve the waterproof effect after the wrist strap and the fixed host are assembled. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a schematic diagram of the decomposition structure of the present invention;

[0028] Figure 2 It is a structural schematic diagram of the present invention;

[0029] Figure 3 Schematic diagram of the exploded structure of the FPC assembly of the present invention;

[0030] Figure 4 Schematic diagram of the exploded structure of the metal electrode sheet of the present invention;

[0031] Figure 5 is a cross-sectional view of the present invention;

[0032] Figure 6 This is the assembly diagram of the present invention fixing the host and the wrist strap

[0033] Figure 7 for Figure 6 Partial cross-sectional view of . DETAILED DESCRIPTION

[0034] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0035] See also Figures 1 to 5 , which is an embodiment of the present invention, a method for manufacturing a wristband with multiple sets of embedded electrode sheets, comprising:

[0036] S1: Select an electrode sheet 1, which can be a metal electrode sheet or a silicone electrode sheet;

[0037] S2: placing multiple electrode sheets 1 in corresponding mold cavities and injecting liquid silicone into the mold. After the liquid silicone cools, it forms a belt body 2. The peripheral sides of the multiple electrode sheets 1 are all covered and fixed by the belt body 2, and the contact surfaces of the multiple electrode sheets 1 are slightly raised on the inner side of the belt body 2, so that the multiple electrode sheets 1 are connected to the belt body 2 as a whole, preventing a gap from being generated at the connection part between the electrode sheets 1 and the belt body 2, thereby improving the packaging effect.

[0038] S3: The FPC assembly 3 includes an FPC flexible cable 31 and an upper cover 32. The starting end of the FPC flexible cable 31 is adapted to the upper cover 32, and the upper cover 32 covers the FPC flexible cable 31. Two bosses 33 are provided on the upper cover 32, and a plurality of mounting holes are provided on the two bosses 33. In this embodiment, each boss 33 is provided with seven mounting holes, and each mounting hole is provided with a plug-in type PIN pin 35. The plug-in type PIN pin 35 passes through the upper cover 32. The starting end of the FPC flexible cable 31 is provided with an insertion hole 36 adapted to the plug-in type PIN pin 35. The tail ends of the multiple plug-in type PIN pins 35 are respectively inserted into the multiple insertion holes 36 and are welded and fixed to fix the FPC flexible cable 31 to the upper cover 32. The inner side of the FPC flexible cable 31 is provided with solder pads corresponding to the number of electrode sheets 1, and each solder pad is welded with two conducting pins 37;

[0039] S4: Two holes adapted for the conducting pins 37 are retained on the rear end surface of each electrode sheet 1, and the conducting pins 37 are embedded in the holes. The FPC flexible cable 31 is attached to the outer surface of the strap body 2;

[0040] S5: Place the integrated strap body 2, electrode sheet 1 and FPC assembly 3 in another corresponding mold cavity, and inject liquid silicone for the second time. The liquid silicone injected for the second time forms a sealing tape 4 after cooling. The sealing tape 4 and the strap body 2 cover the FPC assembly 3. The sealing tape 4 has two openings that are compatible with the boss 33. The two bosses 33 pass through the two openings, and the plug-in PIN needle 35 is left on the upper surface of the sealing tape 4, which is convenient for connection with the fixed host 10 and prevents the boss 33 from generating a gap at the connection part with the sealing tape 4, thereby improving the packaging effect. The fitting surfaces of the multiple electrode sheets 1 are slightly raised on the inner side of the strap body 2, and the production of the wrist strap is completed.

[0041] Among them, the molding temperature of the above-mentioned liquid silicone is below 120 degrees Celsius, while the heat resistance of the FPC component 3 is higher than 200 degrees Celsius. The molding temperature of the liquid silicone is much lower than the heat resistance temperature of the FPC component 3. When the liquid silicone is injected for the second time, the temperature of the liquid silicone cannot dissolve the FPC component 3, ensuring the normal use of the wrist strap after assembly.

[0042] In the present invention, the upper cover 32 is provided with a mold opening 38, and an identification ID chip 39 is embedded in the mold opening 38. The identification ID chip 39 is electrically connected to the FPC soft cable 31. When the fixed host 10 is electrically connected to the wrist strap, the fixed host 10 can detect the independent ID number in the identification ID chip 39 and obtain parameters such as conduction information to ensure that the wrist strap used by the user is compatible with the fixed host 10.

[0043] In the present invention, each 33 boss is provided with two magnet mounting holes 40, and the two magnet mounting holes 40 are respectively located on both sides of the plug-in type PIN needle 35. The bottom of the magnet mounting hole 40 is glued with glue and a magnet 41 is embedded therein. The upper surface of the magnet 41 is flush with the upper surface of the sealing tape 4. The bottom of the fixed host 10 is also provided with a second magnet adapted to the multiple magnets 41 and a plurality of connecting holes adapted to the plug-in type PIN needle 35. The plug-in type PIN needle 35 is inserted into the connecting hole and is connected to the second magnet by adsorption of the magnet 41, thereby realizing rapid disassembly and assembly of the wrist strap and the fixed host, and the wrist strap and the fixed host are electrically connected to the plug-in type PIN needle 35 through the connecting hole, thereby indirectly realizing the electrical connection between the fixed host 10 and the electrode sheet 1.

[0044] Furthermore, the plug-in type PIN needle 35 is a pogopin spring guide needle. The pogopin spring guide needle is a spring-type probe formed by three basic components: a needle shaft, a spring, and a needle tube, which are pre-stressed by riveting with a precision instrument. There is a precision spring structure inside it. When the pogopin spring guide needle is inserted into the connecting hole, its elastic effect can ensure that the plug-in type PIN needle 35 maintains an elastic contact connection with the contact PIN point in the connecting hole, preventing the fixed host 10 from being disconnected from the wrist strap, thereby improving the stability of electrotherapy.

[0045] Furthermore, a circle of raised portions 42 is provided on the upper surface of the sealing belt 4. The raised portions 42 are secondary liquid silicone injection molded and are in an annular closed shape. The raised portions 42 implemented in this embodiment are rectangular, and the micro-raised portions 42 surround the two bosses. An annular groove is provided at the bottom of the fixed host 10. The annular groove surrounds the connecting hole and the second magnet. The shape and size of the annular groove are adapted to the raised portion 42. The raised portion 42 is embedded in the annular groove. The raised portion 42 is tightly sealed with the annular groove, thereby achieving waterproofing between the fixed host 10 and the wrist strap, and can effectively improve the waterproofing effect after the wrist strap and the fixed host 10 are assembled.

[0046] In the present invention, when the electrode sheet 1 is a metal electrode sheet, the metal electrode sheet includes a conductive metal sheet 11 and a rubber coating 12, and a plurality of small holes 13 are provided on the side of the conductive metal sheet 11. After the conductive metal sheet 11 is placed in a special mold cavity, liquid plastic is injected. The liquid plastic can flow into the small holes 13. After cooling, the conductive metal sheet 11 and the rubber coating 12 can be firmly connected. The conductive metal sheet 11 and the rubber coating 12 are completely fitted together. The rubber coating 12 has a hole position adapted to the conductive pin 37, wherein the conductive pin 37 is a plug-in PIN pin 35 with an elastic contact. The tail of the conductive pin 37 is inserted into the FPC soft cable 31 for welding and fixing. After the conductive pin 37 is buckled into the hole position of the rubber coating 12, it is elastically contacted with the inner surface of the conductive metal sheet 11 to ensure the electrical connection between the FPC soft cable 31 and the electrode sheet 1. The conductive metal sheet 11 of this embodiment is made of copper, and a layer of gold or silver chloride is electroplated on the bonding surface of the conductive metal sheet 11. Gold plating or silver plating can increase the conductivity, wear resistance and corrosion resistance, and can be in contact with the skin for a long time, thereby improving parameter performance and service life.

[0047] In the present invention, the electrode sheet 1 is a silicone electrode sheet. Hot-melt silicone mixed with electroplated graphite is injected into a specially designed mold cavity. After the hot-melt silicone cools, the silicone electrode sheet is formed. The silicone electrode sheet has a hole that is compatible with the conductive pin 37, and the diameter of the hole is slightly smaller than that of the conductive pin 37. The conductive pin 37 is inserted into the hole of the silicone electrode sheet to form an interference fit, thereby connecting the FPC flexible cable 31 to the electrode sheet 1. The conductive pin 37 used in the silicone electrode sheet is a non-spring guide pin, that is, a guide pin without an internal spring structure. The silicone electrode sheet of this embodiment has a resistance of less than 5Ω, which effectively ensures good electrical conductivity between the conductive pin 37 and the silicone electrode sheet, achieving an optimal electrotherapy effect. The molding temperature of the silicone electrode sheet is higher than that of liquid silicone, which prevents the silicone electrode sheet from dissolving during liquid silicone injection molding.

[0048] The fitting surface of the electrode sheet 1 can be a curved surface or a flat surface, and the fitting surface can be set according to ergonomics, wherein the curvature of the fitting surface is set according to the part in contact with the user. In this embodiment, three electrode sheets 1 are evenly arranged on the FPC soft cable 31, wherein the fitting surface of the electrode sheet 1 located under the upper cover plate 32 is a flat surface, and the fitting surfaces of the other two electrode sheets 1 are curved surfaces, and the two electrode sheets 1 with curved surfaces are set according to the curvature of the part in contact with the human body, so that the electrode sheet 1 can perfectly fit the user's skin and cooperate with the electrotherapy device for electrotherapy to achieve the best electrotherapy effect.

[0049] The fitting surface of the electrode sheet 1 is used to contact the user's skin, and the corresponding stimulation current is output to the electrode sheet 1 through the fixed host 10 to achieve an electrotherapy effect.

[0050] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above and that the invention can be embodied in other specific forms without departing from the spirit or essential characteristics of the invention. Therefore, the embodiments should be considered in all respects as illustrative and non-restrictive, and the scope of the invention is defined by the appended claims, not the foregoing description, and all variations within the meaning and range of equivalents of the claims are intended to be included therein. Any reference sign in a claim should not be construed as limiting the claim to which it relates.

Claims

1. A method for manufacturing a wristband with multiple embedded electrode sheets, the wristband comprising electrode sheets, a band body, an FPC assembly, and a sealing tape, characterized in that: S1: Select an electrode sheet, which can be a metal electrode sheet or a silicone electrode sheet; S2: placing multiple electrode sheets in corresponding mold cavities and injecting liquid silicone into the mold. After the liquid silicone cools, it forms a belt body. The peripheral sides of the multiple electrode sheets are all covered and fixed by the belt body, and the contact surfaces of the multiple electrode sheets are slightly raised on the inner side of the belt body. S3: The FPC assembly includes an FPC flexible cable and an upper cover plate. The starting end of the FPC flexible cable is adapted to the upper cover plate, and the upper cover plate is covered on the FPC flexible cable. A boss is provided on each side of the upper surface of the upper cover plate. Both bosses are provided with multiple mounting holes. Each mounting hole is provided with a plug-in type PIN needle, and the plug-in type PIN needle passes through the upper cover plate. The starting end of the FPC flexible cable is provided with an insertion hole adapted to the plug-in type PIN needle. The tail ends of the multiple plug-in type PIN needles are respectively inserted into the multiple insertion holes and fixed by welding. The inner side of the FPC flexible cable is provided with solder pads corresponding to the number of electrode sheets, and each solder pad is welded with two conduction pins; S4: Two holes adapted for the conducting pins are retained on the back side of each electrode sheet, and the two conducting pins are embedded in the multiple holes in a one-to-one correspondence, and the FPC assembly is naturally bent and fits the outer side of the strap body; S5: Place the integrated strap body, electrode sheet and FPC assembly in another corresponding mold cavity, and inject liquid silicone for the second time. The liquid silicone injected for the second time forms a sealing tape after cooling. The sealing tape and the strap body cover the FPC assembly. The sealing tape has two openings adapted to the bosses. The two bosses pass through the two openings in a one-to-one correspondence. The fitting surfaces of the multiple electrode sheets are slightly raised on the inner side of the strap body, completing the production of the wrist strap.

2. The method for manufacturing a wristband with multiple embedded electrode pads according to claim 1, characterized in that: The upper cover plate is provided with a mold opening, an identification ID chip is embedded in the mold opening, and the identification ID chip is electrically connected to the FPC flexible cable.

3. The method for manufacturing a wristband with multiple embedded electrode pads according to claim 1 or 2, characterized in that: Each of the bosses is provided with two magnet mounting holes, which are respectively located on both sides of the plug-in PIN pin. The bottom of the magnet mounting hole is glued with glue and then a magnet is embedded therein, and the upper surface of the magnet is flush with the upper surface of the sealing tape.

4. The method for manufacturing a wristband with multiple embedded electrode pads according to claim 1, characterized in that: The electrode sheet is a metal electrode sheet, which includes a conductive metal sheet and a rubber coating layer. A plurality of small holes are provided on the circumference of the conductive metal sheet. After the conductive metal sheet is placed in a special mold cavity, liquid glue is injected. The liquid glue can flow into the small holes. After cooling, the conductive metal sheet and the rubber coating layer can be firmly connected. The rubber coating layer has a hole position adapted for the conducting needle. After the conducting needle is inserted into the hole position, it elastically contacts and connects with the conductive metal sheet.

5. The method for manufacturing a wristband with multiple embedded electrode pads according to claim 1, characterized in that: The electrode sheet is a silicone electrode sheet. Hot-melt silicone mixed with electroplated graphite is injected into a special mold cavity. After the hot-melt silicone cools down, a silicone electrode sheet is formed. The silicone electrode sheet has a hole that is compatible with the conductive needle, and the diameter of the hole is slightly smaller than the diameter of the conductive needle. After the conductive needle is buckled into the hole of the silicone electrode sheet, an interference fit is formed to fix it.

6. A method for manufacturing a wristband with multiple embedded electrode pads according to any one of claims 1, 4 or 5, characterized in that: The fitting surface of the electrode sheet may be a curved surface or a flat surface, and the fitting surface may be set according to ergonomics, wherein the curvature of the fitting surface is set according to the portion in contact with the user.

7. The method for manufacturing a wristband with multiple embedded electrode pads according to claim 1, characterized in that: A circle of raised parts is provided on the upper surface of the sealing belt. The raised parts are in an annular closed shape and surround the two bosses.

8. The method for manufacturing a wristband with multiple embedded electrode groups according to any one of claims 1, 4 or 5, characterized in that: The plug-in type PIN needle and the conducting needle for the metal electrode sheet are pogopin spring guide needles.

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