A bioelectrode component includes an electrode member. The electrode member includes a metal plate, a coupling bar, and a needle part. The metal plate includes a first surface and a second surface opposite to the first surface, and includes an opening formed in the metal plate. The coupling bar extends inward from an inner wall of the opening. The needle part is arranged at a leading end of the coupling bar and protrudes toward the first surface of the metal plate.

CROSS-REFERENCE TO RELATED APPLICATION

The present application claims priority from Japanese Patent Application No. 2017-219641 filed on Nov. 15, 2017, the entire content of which is incorporated herein by reference.

BACKGROUND

Technical Field

The present disclosure relates to an electrode component for a biological body (hereafter, referred to “bioelectrode component”).

Related Art

In the related art, biosignals such as electrocardiogram and brain wave are measured by bringing an electrode pad into contact with skin of a human body. As the electrode pad, a pad in which particles of Ag and AgCl are mixed with a gel phase resin is used.

Also, a micro needle for hypodermic injection has been developed. In the micro needle, a plurality of small needle parts is provided on a sheet, and a layer of which skin is shallow is pierced with the needle parts, so that a medicinal agent such as vaccine is medicated into the skin and can reach an inside of the body.

Since the electrode pad in which the particles of Ag and AgCl are mixed with the gel phase resin is just contacted to a surface of the skin of the human body, the electrode pad is likely to be influenced due to a noise and cannot be thus applied for a utility for obtaining correct information of the human body.

Also, since the micro needle is required to be fixed to the skin of the human body for a predetermined time period by an adhesive film, the needle parts may separate from the skin by routine movement.

SUMMARY

Exemplary embodiments of the present invention provide a bioelectrode component capable of preventing a needle part of a bioelectrode component piercing a biological surface from separating from the biological surface.

A bioelectrode component according to an exemplary embodiment, comprises:

an electrode member, the electrode member comprising:a metal plate including a first surface and a second surface opposite to the first surface and including an opening formed in the metal plate,a coupling bar extending inward from an inner wall of the opening, anda needle part arranged at a leading end of the coupling bar and protruding toward the first surface of the metal plate.

A manufacturing method of a bioelectrode component, the manufacturing method comprises:

processing a metal plate having a first surface and a second surface opposite to the first surface to form an opening, a coupling bar extending inward from an inner wall of the opening and a needle part coupled to the coupling bar; and

bending the needle part so as to protrude toward the first surface of the metal plate, thereby obtaining an electrode member.

According to the exemplary embodiments, the bioelectrode component includes the electrode member, the electrode member has the opening formed in the metal plate having the first surface and the second surface opposite to the first surface, and the coupling bar extends inward from the inner wall of the opening. Also, the needle part protruding toward the first surface of the metal plate is erected at the leading end of the coupling bar.

The adhesive film of the bioelectrode component is bonded to a biological surface, so that the needle part of the electrode member pierces the biological surface and is fixed thereto. When routine movement is performed with the bioelectrode component being fixed to the biological surface, the metal plate of the electrode member may float and move from the biological surface.

According to the bioelectrode component, since the needle part of the electrode member is coupled to the inner wall of the opening of the metal plate via the coupling bar, stress that is applied to the needle part due to the movement of the metal plate is relieved by the coupling bar.

Thereby, the needle part of the electrode member of the bioelectrode component is prevented from separating from the biological surface, so that it is possible to stably keep the state in which the needle part pierces the biological surface.

DETAILED DESCRIPTION

Hereinafter, exemplary embodiments will be described with reference to the accompanying drawings.

First Exemplary Embodiment

FIG. 1is a perspective view depicting an electrode member of a bioelectrode component of a first exemplary embodiment. As shown inFIG. 1, an electrode member5that is used for a bioelectrode component of the first exemplary embodiment includes a thin plate-shaped metal plate10, and the metal plate10is formed with a plurality of openings10a. The opening10aof the metal plate10is formed to penetrate the metal plate10in a thickness direction.

The metal plate10has a first surface S1and a second surface S2opposite to the first surface. In the example ofFIG. 1, the first surface S1of the metal plate10is an upper surface, and the second surface S2is a lower surface.

As the metal plate10, a metal foil made of titanium (Ti), nickel silver (copper (Cu)/zinc (Zn)/nickel (Ni) alloy) or the like is used. A thickness of the metal plate10is 0.05 mm to 0.1 mm, for example.

Referring to a partially enlarged perspective view ofFIG. 1, the electrode member5includes a coupling bar12extending inward from an inner wall of the opening10aof the metal plate10. The coupling bar12is formed as a part of the metal plate10, and is coupled to the inner wall of the opening10a.

Also, a needle part14protruding toward the first surface S1(the upper surface) of the metal plate10is arranged at a leading end of the coupling bar12. The needle part14is bent from the leading end of the coupling bar12toward the first surface S1(the upper surface) of the metal plate10. The needle part14is formed as a part of the metal plate10, and is erected vertically with being coupled to the leading end of the coupling bar12.

In this way, the needle parts14are respectively arranged in the plurality of openings10aof the metal plate10with being supported by the coupling bars12.

In the example ofFIG. 1, as seen from a side, the needle part14has a triangular shape having a sharp leading end, and a width of a bottom side of the needle part14is set greater than a width of the coupling bar12.

Alternatively, like a needle part14aof a first modified embodiment shown inFIG. 2A, the needle part may have a pentagonal shape having a sharp leading end, as seen from a side.

Also, like a needle part14bof a second modified embodiment shown inFIG. 2B, a width of a base part of the needle part14bmay be set to be the same as the width of the coupling bar12, as seen from a side.

Also, like a needle part14cof a third modified embodiment shown inFIG. 2C, a structure where a part of the leading end of the coupling bar12of the electrode member5shown inFIG. 1is configured as an erection part12aprotruding toward the first surface S1(the upper surface) of the metal plate10may be adopted. The erection part12aof the coupling bar12is coupled to a central portion of the bottom surface of the needle part14c.

As described later, an adhesive film of the bioelectrode component is bonded to a biological surface, so that the needle part14of the electrode member5pierces the biological surface and is fixed thereto. The coupling bar12of the electrode member5is provided so as to relieve stress, which is to be applied to the needle part14due to movement of the metal plate10of the electrode member5, and to thus prevent the needle part14separating from the biological surface.

Since the needle part14aof the first modified embodiment shown inFIG. 2Ahas a volume and a surface area greater than the needle part14ofFIG. 1, a total area to contact the biological surface increases, so that it is possible to stably obtain information of a human body more correctly.

Also, since the width of the needle part14bof the second modified embodiment shown inFIG. 2Bis small, it is possible to reduce an arrangement pitch of the needle parts14b, so that it is possible to configure the electrode member5having the needle parts14bof a high density.

Also, in the example of the electrode member5shown inFIG. 1, the bottom surface of the triangular needle part14and the first surface S1of the metal plate10(the upper surface of the coupling bar12) are arranged at the same height position or at the close height positions. For this reason, when piercing the biological surface with the needle part14of the electrode member5, the needle part14pierces the biological surface up to the position of the bottom surface thereof, and the bottom surface of the needle part14is exposed from the biological surface.

When adopting the needle part14cof the third modified embodiment shown inFIG. 2C, since the needle part14cpierces the biological surface up to the erection part12aof the lower coupling bar12, the bottom surface of the needle part14is embedded in the biological surface.

Therefore, since a part between the needle part14cand the erection part12aof the coupling bar12functions as an anchor, the needle part14ccan be prevented from separating from the biological surface.

Subsequently, a manufacturing method of the electrode member5of the bioelectrode component is described. As shown inFIG. 3A, a metal foil10xhaving a thickness of 0.05 mm to 0.1 mm is first prepared. The metal foil10xhas the first surface S1and the second surface S2opposite to the first surface. The metal foil is an example of the metal plate. For the metal foil10x, a plurality of product regions (not shown) for obtaining the electrode member is demarcated.

Then, the metal foil10xis arranged on a die20of a mold, and the metal foil10xis punched by a punch22of the mold.

Alternatively, as shown inFIG. 3B, the metal foil10xmay be penetrated by laser, instead of the press working.

Thereby, as shown inFIG. 3C, the metal foil10xis formed with the opening10a. Also, at the same time, the coupling bar12extending inward from the inner wall of the opening10aof the metal foil10xand the needle part14coupled to the coupling bar12and having a triangular shape of which the leading end is sharp are formed. At this time, the needle part14is arranged with extending horizontally integrally with the coupling bar12.

For example, a width W of the coupling bar12is set to 0.1 mm to 0.15 mm, and a length L1is set to about 0.2 mm to 0.3 mm. Also, a width W2of the bottom side of the needle part14is set to 0.15 mm to 0.2 mm and a length L2is set to 0.2 mm to 0.3 mm.

FIG. 4Adepicts the metal foil10xtaken along a line X1-X1ofFIG. 3C. As shown inFIG. 4A, the needle part14arranged horizontally together with the coupling bar12in the opening10aof the metal foil10xis bent toward the first surface S1(the upper surface) of the metal foil10xby a punch24of the mold.

In a state where a die50having an opening50ais arranged above the needle part14formed at the metal foil10x, the needle part14is bent toward an upper side of the opening50aby the punch24.

In this way, as shown inFIG. 4B, the needle part14is made to protrude from the leading end of the coupling bar12toward the first surface S1(the upper surface) of the metal foil10x. The needle part14is erected vertically from the leading end of the coupling bar12arranged horizontally.

Also, the metal foil10xis cut so as to obtain each product region. By the above processes, the electrode member5of the bioelectrode component shown inFIG. 1is manufactured.

When forming the needle part14cof the third modified embodiment shown inFIG. 2C, during the press working ofFIGS. 3C to 4B, a central part of the coupling bar12ofFIG. 3Cis bent toward the first surface S1(the upper surface) so that the erection part12aof the coupling bar12and the needle part14care to protrude.

FIG. 5depicts a bioelectrode component1of the first exemplary embodiment for which the electrode member5ofFIG. 1is used. As shown inFIG. 5, the bioelectrode component1of the first exemplary embodiment includes the electrode member5ofFIG. 1and an adhesive film30bonded to the second surface S2(the lower surface) of the metal plate10of the electrode member5.

A size of the adhesive film30is set greater than a size of the electrode member5, and the entire second surface S2(the lower surface) of the metal plate10of the electrode member5is covered with the adhesive film30. A peripheral edge region of the adhesive film30exposed from the electrode member5is configured as an adhesion region AR to be bonded to a biological surface.

The adhesive film30is bonded to the metal plate10of the electrode member5by an adhesive provided on its adhesion surface, and the adhesion region AR is also arranged thereon with the adhesive.

In this way, the adhesive film30has the ring-shaped adhesion region AR exposed from the electrode member5on a surface facing toward the first surface S1(the upper surface) of the metal plate10of the electrode member5.

In a state before the bioelectrode component1is fixed to the biological surface, the bioelectrode component1has a protection film (not shown) bonded to the electrode member5and the adhesion region AR of the adhesive film30. The protection film is peeled off when bonding the bioelectrode component1to the biological surface.

The adhesion region AR of the adhesive film30is bonded to the biological surface, so that the needle part14of the electrode member5pierces the biological surface and is fixed thereto.

Subsequently, a method of fixing the bioelectrode component1of the first exemplary embodiment to the biological surface is described.FIG. 6Ais a partial sectional view taken along a line X2-X2of the bioelectrode component1shown inFIG. 5, in which the coupling bar12and the needle part14arranged in one opening10aof the metal plate10are partially shown.

As shown inFIGS. 6B and 6C, a biological surface6is pierced with the needle part14of the electrode member5of the bioelectrode component. The biological surface6is skin, a mucous membrane or the like of the human body.

At this time, although not particularly shown, the adhesion region AR of the adhesive film30of the bioelectrode component1shown inFIG. 5is bonded to the biological surface6, and the electrode member5is pressed to the biological surface6. Thereby, the electrode member5is fixed to the biological surface6by the adhesive film30with the plurality of needle parts14of the electrode member5piercing the biological surface6at the same time.

When measuring a variety of biosignals by the bioelectrode component1, the electrode member5is connected to a measurement device by an electric wire (not shown). Alternatively, a medicinal agent such as vaccine arranged in the electrode member5may be medicated into the biological surface for a predetermined time period.

At this time, when routine movement is performed with the bioelectrode component1being fixed to the biological surface6, the metal plate10of the electrode member5may float and move from the biological surface6.

According to the electrode member6of the bioelectrode component1of the first exemplary embodiment, since the needle part14is coupled to the inner wall of the opening10aof the metal plate1via the coupling bar12, the stress that is applied to the needle part14due to the movement of the metal plate10is relieved by the coupling bar12.

When the metal plate10of the electrode member5moves in each direction, the coupling bar12configured to support the needle part14is bent, so that the movement of the metal plate10is not directly transmitted to the needle part14. Accordingly, the stress that is applied to the needle part14is relieved.

Thereby, the needle part14of the bioelectrode component1is prevented from separating from the biological surface6, so that it is possible to stably keep the piercing state of the needle part14in the biological surface6.

Unlike the first exemplary embodiment, in a structure where the base part of the needle part is directly coupled to the inner wall of the opening of the metal plate, since the movement of the metal plate is directly transmitted to the needle part, the needle part is likely to separate from the biological surface, in conformity to the movement of the metal plate.

Here, inFIG. 6C, the lower surfaces of the coupling bar12and the needle part14of the electrode member5are bonded to the adhesive film30. For this reason, when the routine movement is performed with the bioelectrode component1being fixed to the biological surface6, the needle part14coupled to the coupling bar12may be likely to separate from the biological surface6, in association with the movement of the adhesive film30.

For this reason, as shown inFIG. 7A, a cover member16may be arranged between the coupling bar12and needle part14and the adhesive film30. The cover member16is made of a cured resin layer, for example, and is obtained by patterning a silicone resin or the like on the adhesion surface of the adhesive film30. The adhesive film30having the cover member16formed on the adhesion surface is positionally aligned and bonded to the electrode member5.

A lower surface of the cover member16is bonded to the adhesive film30, and an upper surface and side surfaces of the cover member16have no adhesiveness.

For this reason, the coupling bar12and the needle part14are just in contact with the cover member16. Therefore, even when the adhesive film30moves, the cover member16bonded to the adhesive film30is separated from the coupling bar12and the needle part14. Therefore, the separation of the needle part14from the biological surface6in association with the movement of the adhesive film30is prevented.

InFIG. 7A, the cover member16is respectively arranged in an island shape on the adhesive film30of parts corresponding to the coupling bar12and the needle part14in each opening10aof the metal plate10. In addition, like a modified embodiment ofFIG. 7B, the cover member16greater than the opening10amay be individually arranged below each opening10aof the metal plate10.

Alternatively, like another modified embodiment ofFIG. 8, the cover member16may be collectively arranged in a region (a region surrounded by the thick dotted line) greater than a collective region in which the plurality of openings10aof the metal plate10is arranged. In this case, only a peripheral edge part of the metal plate10around the cover member16is bonded to the adhesive film30.

Like this, the cover member16is preferably arranged so that the coupling bar12and needle part14of the electrode member5and the adhesive film30are not to be bonded.

In the below, a method of forming the cover member16on the adhesive film30is described. As shown inFIG. 9A, the adhesive film30is first prepared, and an adhesion surface30aof the adhesive film30on which an adhesive is arranged is made to face upward.

Subsequently, a mask layer40having openings40aformed in regions in which the cover members16are to be arranged is prepared. The mask layer40is formed as a release film of which a peeling surface is applied with a release agent and can be thus easily peeled off after being temporarily bonded to the adhesion surface30aof the adhesive film30.

Then, as shown inFIG. 9B, the mask layer40is temporarily bonded to the adhesion surface30aof the adhesive film30.

Also, as shown inFIG. 9C, a resin material16xof liquid phase or paste phase is arranged above the mask layer40, and the resin material16xis laterally moved by a squeegee42. Thereby, as shown inFIG. 10A, the resin material16xis patterned and formed on the adhesive film30through the openings40aof the mask layer40.

Subsequently, as shown inFIG. 10B, the mask layer40is detached and removed from the structure ofFIG. 10A. Since the mask layer40is made of the release film, the mask layer can be peeled off without deteriorating the adhesion surface30aof the adhesive film30.

Also, before or after peeling off the mask layer40, the resin material16xis heated and cured, so that the cover members16are obtained.

As another method of forming the cover member16, a resin film cut into a predetermined size may be bonded to the adhesion surface30aof the adhesive film30. Alternatively, the resin material may be applied in a pattern shape on the adhesion surface30aof the adhesive film30by an inkjet or dispenser.

In the above, the cover member16is formed of the resin. However, a member of which a surface has no adhesiveness may be arranged on the adhesion surface of the adhesive film30, and a metal layer or the like may also be used.

Like this, according to the bioelectrode component1of the first exemplary embodiment, it is possible to stably keep the state in which the biological surface6is pierced with the small needle parts14. For this reason, it is possible to correctly measure the biosignals such as electrocardiogram, brain wave, electromyogram and the like. Also, it is possible to reliably medicate the medicinal agent such as vaccine into the biological body for a predetermined time period.

Second Exemplary Embodiment

FIG. 11is a perspective view depicting an electrode member of a bioelectrode component of a second exemplary embodiment. As shown inFIG. 11, an electrode member5athat is used for the bioelectrode component of the second exemplary embodiment is different from the electrode member5of the first exemplary embodiment shown inFIG. 1, in terms of the shape of the needle part14.

As shown in a partially enlarged perspective view ofFIG. 11, the width W2of the needle part14is set greater than the width W1of the coupling bar12. The needle part14has protrusions P protruding toward the second surface S2(the lower surface) of the metal plate10at both end portions in the width W2direction.

FIG. 12is a sectional view taken along a line X3-X3of the partially enlarged perspective view ofFIG. 11. Referring toFIG. 12, the needle part14has a shape where a triangular shape having a sharp leading end and two rectangular protrusions P formed at both end portions of a bottom surface of the triangular shape are combined each other, as seen from a side.

The two protrusions P formed at the lower part of the needle part14protrude to an outermore position than the second surface S2(the lower surface) of the metal plate10, and lower end faces Sx of the protrusions P are arranged at a lower position than the second surface S2(the lower surface) of the metal plate10.

For example, when a thickness of the metal plate10is 0.1 mm, a protruding length L3of the protrusion P is set to about 0.2 mm, and the lower end face Sx of the protrusion P protrudes by about 0.1 mm from the second surface S2(the lower surface) of the metal plate10.

As described later, when piercing the biological surface with the needle part14of the electrode member5a, if the protrusions P of the needle part14are pushed, the coupling bar12is moved obliquely upward, so that the needle part14pierces the biological surface at an obliquely inclined state. Thereby, the needle part14is difficult to separate from the biological surface.

Subsequently, a method of manufacturing the electrode member5aof the bioelectrode component of the second exemplary embodiment shown inFIG. 11is described. As shown inFIG. 13A, the metal foil10xis punched in the similar method to the process ofFIG. 3Aby the press working, so that the metal foil10xis formed with the opening10a. At the same time, the coupling bar12extending inward from the inner wall of the opening10aof the metal foil10xand the needle part14coupled to the coupling bar12are integrally arranged in the horizontal direction.

The needle part14is coupled to the coupling bar12, and has the triangular part having a sharp leading end and the two protrusions P extending from both end portions of the bottom surface of the triangular part toward the inner wall of the opening10a. The protrusions P of the needle part14are arranged in regions between the coupling bar12and the inner walls of the opening10a.

Alternatively, the metal foil10xmay be perforated by the laser, so that the pattern as shown inFIG. 13Amay be formed on the metal foil10x.

Then, as shown inFIG. 13B, the triangular part of the needle part14ofFIG. 13Ais bent toward the first surface S1(the upper surface) of the metal foil10xin the similar manner to the processes ofFIGS. 4A and 4Bby a punch (not shown).

In this way, the triangular part of the needle part14is made to protrude toward the first surface S1(the upper surface) of the metal foil10x, and the protrusions P of the needle part14are made to protrude toward the second surface S1(the lower surface) of the metal foil10x. By the above processes, the electrode member5aofFIG. 11is manufactured.

FIG. 14depicts a bioelectrode component1aof the second exemplary embodiment for which the electrode member5aofFIG. 11is used. As shown inFIG. 14, like the first exemplary embodiment ofFIG. 5, the adhesive film30is bonded to the second surface S2of the metal plate10of the electrode member5a, so that the bioelectrode component1aof the second exemplary embodiment is configured.

InFIG. 14, the bioelectrode component1ais the same as the bioelectrode component1of the first exemplary embodiment shown inFIG. 5, except that the needle part14of the electrode member5ahas the protrusions P at the lower side thereof.

Subsequently, a method of fixing the bioelectrode component1aof the second exemplary embodiment ofFIG. 14to the biological surface is described.FIG. 15Ais a sectional view taken along a line X4-X4of the bioelectrode component1aofFIG. 14, in which the coupling bar12and the needle part14arranged in one opening10aof the metal plate10are partially shown.

As shown inFIG. 15A, likeFIGS. 6B and 6C, the adhesion region AR of the adhesive film30of the bioelectrode component1aofFIG. 14is bonded to the biological surface6and the electrode member5ais pressed to the biological surface6, so that the biological surface6is pierced with the needle part14.

At this time, according to the bioelectrode component of the second exemplary embodiment, the needle part14has the protrusions P provided at the lower part thereof and protruding to the position lower than the lower surface of the metal plate10. For this reason, as shown inFIG. 15B, when piercing the biological surface6with the needle part14, the protrusions P of the needle part14are pressed to the biological surface6via the adhesive film30.

Accompanied by this, the coupling bar12coupled to the needle part14is moved obliquely upward, so that the needle part14pierces the biological surface6at an obliquely inclined state.

Thereby, as compared to a case where the needle part14pierces vertically the biological surface6, the needle part14is more difficult to separate from the biological surface6. An inclination angle θ relative to a vertical axis of the needle part14is set within a range of 10° to 30°, and is preferably set to 200.

Also, when the protrusions P of the needle parts14are pushed into the biological surface6, the biological surface6can be uniformly and securely pierced up to a predetermined depth with the plurality of needle parts14.

Here, inFIGS. 15A and 15B, when piercing the biological surface6with the needle part14, if the hardness of the adhesive film30is low, the protrusions P of the needle part14may be inserted into the adhesive film30without being sufficiently pressed toward the biological surface6. In this case, since the needle part14is inserted vertically into the biological surface6without being inclined, the sufficient separation preventing effect is not obtained.

For this reason, as shown inFIG. 16A, a cover member16amay be arranged between the protrusions P of the needle part14ofFIG. 15Aand the adhesive film30. The cover member16ashown inFIG. 16Ais formed on the adhesion surface of the adhesive film30in the similar direction to the formation method ofFIGS. 9A to 10B. The cover member16ais preferably formed of a cured resin layer. However, a metal layer or the like may also be used.

As shown inFIG. 16B, the needle part14of the electrode member5ais enabled to pierce the biological surface6with being pressed thereto. At this time, since the rigid cover member16ais arranged below the protrusions P of the needle part14, the protrusions P of the needle part14are securely pressed to the biological surface6by the cover member16a.

Therefore, since there is no probability that the protrusions P of the needle part14will be inserted into the adhesive film30, it is possible to securely pierce the biological surface6with the needle part14at the inclined state.

Also, like the first exemplary embodiment, since the protrusions P of the needle part14and the adhesive film30are separated by the cover member16a, the separation of the needle part14due to the movement of the adhesive film30is prevented.

Also, inFIG. 16A, like the modified embodiment ofFIG. 7A, the cover member16ais respectively arranged in an island shape at a part corresponding to the protrusion P of the needle part14in each opening10aof the metal plate10.

In addition, like the modified embodiment ofFIG. 7B, the cover member16agreater than the opening10amay be individually arranged below each opening10aof the metal plate10.

Alternatively, like the modified embodiment ofFIG. 8, the cover member16amay be collectively arranged in a region (a region surrounded by the thick dotted line) greater than the collective region in which the plurality of openings10aof the metal plate10is arranged.

This disclosure further encompasses various exemplary embodiments, for example, described below.

1. A manufacturing method of a bioelectrode component, the manufacturing method comprising:

processing a metal plate having a first surface and a second surface opposite to the first surface to form an opening, a coupling bar extending inward from an inner wall of the opening and a needle part coupled to the coupling bar; and

bending the needle part so as to protrude toward the first surface of the metal plate, thereby obtaining an electrode member.

2. The manufacturing method of a bioelectrode component according to claim1, wherein in the obtaining the electrode member,

a width of the needle part is set greater than a width of the coupling bar, and

the needle part is formed to have protrusions provided at both end portions thereof and protruding toward the second surface of the metal plate.

3. The manufacturing method of a bioelectrode component according to claim1or2, further comprising:

bonding an adhesive film to the second surface of the metal plate of the electrode member, after the obtaining the electrode member,

wherein the adhesive film has an adhesion region, which is exposed from the electrode member, on a surface facing toward the first surface of the metal plate.

4. The manufacturing method of a bioelectrode component according to claim3, wherein in the bonding the adhesive film, a cover member is arranged between the coupling bar and needle part of the electrode member and the adhesive film.