Biological monitoring device with stable electric conduction

Abstract

The utility model discloses a biological monitoring device with stable electric conduction, which comprises a connecting seat assembly, a base and a spring needle, the connecting seat assembly is provided with a sensing electrode capable of generating electric signals, and the sensing electrode is provided with a first electric conduction area; the base is provided with a printed circuit board for processing electric signals, the printed circuit board is provided with a second electric conduction area, the connecting base assembly is detachably assembled to the base, the spring needle comprises a needle shaft, a spring and a needle tube, the spring is arranged in the needle tube, one end of the needle shaft protrudes out of the needle tube, and the other end of the needle shaft abuts against the spring. The needle shaft can move in the needle tube in a recoverable mode under the action of the spring, and when the connecting base assembly and the base are assembled, the needle shaft makes contact with the first electric conduction area, the needle tube makes contact with the second electric conduction area, and the spring is pressed. According to the biological monitoring device, the electric conduction effect of the biological monitoring device can be enhanced.

Description

Technical Field

[0001] The utility model generally relates to the field of biomedical engineering industry, and in particular to a biological monitoring device with stable electrical conduction. Background Art

[0002] The biological monitoring device can be used to monitor the concentration level of an analyte in the host, such as monitoring the glucose concentration in the human tissue fluid, so as to facilitate the control of the host's physiological level. Generally speaking, the biological monitoring device includes two parts that can be assembled and combined, one of which is provided with a sensing electrode, which is used to be partially implanted subcutaneously to react with the analyte in the host's body fluid to generate an electrical signal; the other part is provided with an electronic module that can be electrically connected to the sensing electrode, and the electrical signal is transmitted to the electronic module for processing and external transmission. When the two parts of the biological monitoring device are combined, the sensing electrode and the electronic module can achieve electrical conduction.

[0003] In the prior art, the sensing electrode and the electronic module can be electrically connected via a conductive column made of a soft material, and the conductive column has a certain elasticity.

[0004] However, before the two parts of the biological monitoring device are combined, the conductive column is first manually assembled into the silicone part. After assembly, the length of the conductive column exposed at both ends of the silicone part needs to be kept consistent, otherwise it will affect the electrical conduction effect between the sensing electrode and the electronic module. In addition, since both the conductive column and the silicone part are soft materials, even if the length of the conductive column exposed at both ends of the silicone part after assembly can be strictly guaranteed to be consistent, during the process of combining the two parts of the biological monitoring device, the conductive column and the silicone part are easily compressed and deformed, which causes the conductive column to easily deviate in the direction of the sensing electrode or the electronic module, which will also affect the electrical conduction effect between the sensing electrode and the electronic module. Summary of the invention

[0005] The utility model is proposed in view of the above situation, and its purpose is to provide a biological monitoring device with stable electrical conduction that can enhance the electrical conduction effect.

[0006] To this end, the utility model provides a device including a connecting seat assembly, a base and a spring needle, wherein the connecting seat assembly is provided with a sensing electrode that can generate an electrical signal and the sensing electrode has a first electrical conduction area, the base is provided with a printed circuit board for processing the electrical signal and the printed circuit board has a second electrical conduction area, the connecting seat assembly can be detachably assembled to the base, the spring needle includes a needle shaft, a spring and a needle tube, the spring is arranged in the needle tube, one end of the needle shaft protrudes from the needle tube and the other end of the needle shaft abuts against the spring, the needle shaft can be restorably moved in the needle tube under the action of the spring, and when the connecting seat assembly is assembled with the base, the needle shaft contacts the first electrical conduction area, the needle tube contacts the second electrical conduction area and the spring is compressed.

[0007] In the utility model, the spring has a stronger recovery tendency after being compressed. At this time, the needle shaft and the needle tube can stably abut the first electrical conduction area and the second electrical conduction area respectively, thereby reducing the risk of the spring needle not contacting the first electrical conduction area or the second electrical conduction area, that is, the electrical conduction effect between the sensing electrode and the printed circuit board can be enhanced.

[0008] In addition, in the biological monitoring device with stable electrical conduction involved in the utility model, optionally, the needle tube is coupled to the second electrical conduction area by welding. In this case, different from the method of manually aligning and contacting the needle tube with the second electrical conduction area to achieve electrical conduction, welding the needle tube with the second electrical conduction area can improve the stability of the electrical conduction between the needle tube and the second electrical conduction area.

[0009] In addition, in the biological monitoring device with stable electrical conduction of the utility model, optionally, the angle between the central axis of the spring needle and the printed circuit board is 90 degrees. In this case, the stability of the needle tube and the second electrical conduction area at the welding point can be improved when the spring needle is compressed, thereby further improving the stability of the electrical conduction between the needle tube and the second electrical conduction area.

[0010] In addition, in the biological monitoring device with stable electrical conduction involved in the utility model, optionally, a fixing piece is wrapped around the periphery of the spring needle, and the fixing piece is fixedly connected to the printed circuit board. In this case, since the welding part is more susceptible to corrosion by water vapor, and the corrosion of the welding part by water vapor will reduce the welding strength between the needle tube and the second electrical conduction area and weaken the electrical conduction effect between the needle tube and the second electrical conduction area, by wrapping the fixing piece fixed to the printed circuit board around the periphery of the spring needle, it is helpful to maintain the welding effect between the needle tube and the second electrical conduction area, and then maintain the stability of the electrical conduction effect between the needle tube and the second electrical conduction area.

[0011] In addition, in the biological monitoring device with stable electrical conduction involved in the utility model, optionally, the connection seat assembly also includes a seal that partially covers the sensing electrode, and the seal has a through hole for the spring pin to pass through to contact the first electrical conduction area. In this case, on the one hand, since the spring pin is restricted by the through hole, even if the coupling between the needle shaft and the second electrical conduction area is not stable enough after long-term use or unexpected external force, the seal can reduce the risk of the spring pin being offset, thereby improving the stability of the electrical conduction between the sensing electrode and the printed circuit board; on the other hand, the seal can play a certain sealing role on the sensing electrode and the spring pin, thereby improving the waterproof performance of the electrical conduction circuit.

[0012] In addition, in the biological monitoring device with stable electrical conduction of the utility model, optionally, the sealing member is made of a silicone material with a hardness of 10 to 65 degrees. In this case, it is beneficial to prevent the sealing member from being too soft or too hard, thereby improving the stability of the assembly of the connecting seat assembly and the base.

[0013] In addition, in the biological monitoring device with stable electrical conduction of the utility model, optionally, the needle shaft has a bottom surface with an acute angle with the printed circuit board. In this case, when the spring is compressed due to the first electrical conduction area abutting the needle shaft, the force deviating from the central axis of the spring needle can be transmitted to the needle shaft through the bottom surface, so that the needle shaft and the needle tube can be more closely attached after the connector assembly and the base are assembled, thereby further enhancing the electrical conduction effect between the sensing electrode and the printed circuit board.

[0014] In addition, in the biological monitoring device with stable electrical conduction involved in the utility model, optionally, the welding method is fillet welding, and the height of the weld on the side close to the bottom surface of the welding point is greater than the height of the weld on the side away from the bottom surface. In this case, when the angle between the bottom surface of the needle shaft and the printed circuit board is an acute angle, the force applied by the spring to the needle shaft is always biased towards the side close to the bottom surface of the welding point. By making the height of the weld on the side close to the bottom surface greater than the height of the weld on the side away from the bottom surface, the welding strength on the side close to the bottom surface of the welding point can be improved, thereby improving the stability of the needle tube and the second electrical conduction area at the welding point, thereby improving the stability of the electrical conduction between the needle tube and the second electrical conduction area.

[0015] In addition, in the biological monitoring device with stable electrical conduction of the utility model, optionally, the needle shaft protrudes from the contact surface between the seal and the sensing electrode. In this case, when the connector assembly is assembled with the base, the spring can be stably compressed, thereby improving the stability of electrical conduction between the spring needle and the first electrical conduction area and the second electrical conduction area.

[0016] In addition, in the biological monitoring device with stable electrical conduction of the utility model, optionally, one end of the through hole close to the welding position has a depression along the aperture direction. In this case, the through hole can better accommodate the spring needle and the welding position of the needle tube and the second electrical conduction area, thereby improving the stability of the welding position of the needle tube and the second electrical conduction area.

[0017] According to the utility model, a biological monitoring device with stable electrical conduction and enhanced electrical conduction effect can be provided. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The present invention will now be explained in further detail by way of example only with reference to the accompanying drawings.

[0019] Figure 1 It is a schematic diagram showing the structure of a biological monitoring device involved in an example of the present utility model.

[0020] Figure 2 It is a schematic diagram showing the structure of the connecting socket assembly involved in the example of the utility model.

[0021] Figure 3 This is a diagram showing the example of the present utility model. Figure 1 A magnified schematic diagram of area a.

[0022] Figure 4 It is a schematic diagram showing the connection between the spring pin involved in the example of the utility model and the printed circuit board.

[0023] Figure 5 The utility model example is shown along the Figure 4 A-A' cross-sectional view.

[0024] Figure 6 This is a diagram showing the example of the present utility model. Figure 5 A magnified schematic diagram of area b.

[0025] Figure 7 It is a schematic diagram showing the structure in which the sealing member involved in the example of the utility model partially covers the sensing electrode. DETAILED DESCRIPTION

[0026] Hereinafter, with reference to the accompanying drawings, the preferred embodiments of the present invention will be described in detail. In the following description, the same symbols are assigned to the same components, and repeated descriptions are omitted. In addition, the accompanying drawings are only schematic diagrams, and the ratio of the dimensions of the components or the shapes of the components may be different from the actual ones.

[0027] It should be noted that the terms "including" and "having" and any variations thereof in the present invention, such as a process, method, system, product or device that includes or has a series of steps or units, are not necessarily limited to those steps or units clearly listed, but may include or have other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0028] The utility model provides a biological monitoring device with stable electrical conduction (hereinafter referred to as a biological monitoring device). In some examples, the biological monitoring device may be a continuous glucose monitor (Continuous Glucose Monitoring). Through the structure involved in the utility model, the biological monitoring device can achieve stable electrical conduction.

[0029] Hereinafter, taking a biological monitoring device as a continuous blood glucose monitor as an example, how the biological monitoring device involved in the present utility model achieves stable electrical conduction is described.

[0030] Figure 1 Schematic diagram showing the structure of a biological monitoring device 10 according to an example of the present utility model. Figure 2 Schematic diagram showing the structure of the connection socket assembly 110 involved in the example of the present utility model. Figure 3 This is a diagram showing the example of the present utility model. Figure 1 A magnified schematic diagram of area a.

[0031] See also Figure 1 In some examples, the biological monitoring device 10 may include a connection base assembly 110, and the connection base assembly 110 may be provided with a sensing electrode 1110 that can generate an electrical signal (see Figure 2 ). In other words, the sensing electrode 1110 can be disposed on the connection base assembly 110 .

[0032] In some examples, the sensing electrodes 1110 can include a counter electrode, a working electrode, and a reference electrode.

[0033] In some examples, sensing electrodes 1110 may be partially implanted subcutaneously of the host.

[0034] In some examples, the sensing electrode 1110 may include a subcutaneous portion implanted below the skin and an supra-body portion in electrical communication with other components.

[0035] In some examples, the sensing electrode 1110 can have a first electrically conductive region. In some examples, the upper body portion can have a first electrically conductive region.

[0036] In some examples, the first electrical conduction region may be a region for electrically conducting the sensing electrode 1110 with other components.

[0037] In some examples, the first electrically conductive region can be three contacts corresponding to the counter electrode, the working electrode, and the reference electrode, respectively.

[0038] In some examples, there may be a preset interval between the three contacts. In this case, when other components are electrically connected to the sensing electrode 1110, the possibility of interference between circuits can be reduced.

[0039] See also Figure 1 In some examples, the biological monitoring device 10 may further include a base 120, on which a printed circuit board 1210 for processing electrical signals may be disposed (see Figure 3 ). In other words, the printed circuit board 1210 can be disposed on the base 120 .

[0040] In some examples, a power supply may be further provided on the base 120 , and the power supply may provide electrical energy to the printed circuit board 1210 .

[0041] In some examples, the power source may be a coin cell battery.

[0042] In some examples, the printed circuit board 1210 may have a second electrical conduction region. In some examples, the second electrical conduction region may be a region for electrically connecting the printed circuit board 1210 to other components.

[0043] In some examples, the position of the second electrically conductive region on the printed circuit board 1210 may correspond to the position of the first electrically conductive region on the sensing electrode 1110, and the range of the second electrically conductive region may be equivalent to the range of the first electrically conductive region. Thus, the convenience of electrically connecting the first electrically conductive region and the second electrically conductive region can be improved.

[0044] In some examples, the base 120 may include a receiving space for receiving the connector assembly 110. In some examples, the shape of the receiving space may be adapted to the shape of the connector assembly 110.

[0045] In some examples, the connector assembly 110 can be detachably assembled with the base 120. In other words, the connector assembly 110 can be detachably assembled to the base 120. In some examples, the connector assembly 110 can be assembled to the receiving space of the base 120.

[0046] See also Figure 3 In some examples, the biological monitoring device 10 may further include a spring pin (also called a Pogo Pin) 130 , which may be used to electrically connect the first electrical conduction area and the second electrical conduction area.

[0047] In some examples, the spring pin 130 may be disposed between the printed circuit board 1210 and the sensing electrode 1110. In some examples, the spring pin 130 may be disposed between the first electrical conduction region and the second electrical conduction region.

[0048] Figure 4 1 is a schematic diagram showing the connection between the spring pin 130 and the printed circuit board 1210 involved in the example of the utility model. Figure 5 The utility model example is shown along the Figure 4 A-A' cross-sectional view. Figure 6 This is a diagram showing the example of the present utility model. Figure 5 A magnified schematic diagram of area b.

[0049] See also Figure 5 In some examples, the spring needle 130 may include a needle shaft 1310 , a spring 1320 , and a needle tube 1330 .

[0050] In some examples, the spring 1320 may be disposed in the needle tube 1330. In some examples, one end of the needle shaft 1310 may protrude from the needle tube 1330 and the other end of the needle shaft 1310 may abut against the spring 1320. In some examples, the needle shaft 1310 may be movable in the needle tube 1330 in a restorable manner under the action of the spring 1320. In this case, when the end of the needle shaft 1310 protruding from the needle tube 1330 is acted upon by an external force, the other end of the needle shaft 1310 may be able to compress the spring 1320 together with the needle tube 1330, thereby making the spring 1320 have a stronger restoring tendency.

[0051] In some examples, pogo pins 130 may be coupled to printed circuit board 1210 .

[0052] See also Figure 4 In some examples, the spring pin 130 can be coupled to the printed circuit board 1210 by welding. In this case, the spring pin 130 can be fixed to the printed circuit board 1210 by means of a placement machine, thereby improving the efficiency of fixing the spring pin 130 to the printed circuit board 1210 in batches.

[0053] In some examples, needle tube 1330 can be coupled to the second electrical conduction area by welding. In this case, unlike the method of manually aligning and contacting needle tube 1330 with the second electrical conduction area to achieve electrical conduction, welding needle tube 1330 with the second electrical conduction area can improve the stability of electrical conduction between needle tube 1330 and the second electrical conduction area.

[0054] In some examples, when the connector assembly 110 is assembled with the base 120, the needle shaft 1310 may contact the first electrical conduction area, the needle tube 1330 may contact the second electrical conduction area, and the spring 1320 may be compressed. In this case, the spring 1320 has a stronger recovery tendency after being compressed, and the needle shaft 1310 and the needle tube 1330 can stably abut the first electrical conduction area and the second electrical conduction area, respectively, thereby reducing the risk of the spring needle 130 not contacting the first electrical conduction area or the second electrical conduction area, that is, the electrical conduction effect between the sensing electrode 1110 and the printed circuit board 1210 can be enhanced.

[0055] See also Figure 4 or Figure 5 In some examples, the angle between the central axis of the spring pin 130 and the printed circuit board 1210 can be 90 degrees. In this case, the stability of the welding point between the needle tube 1330 and the second electrical conduction area can be improved when the spring pin 130 is compressed, thereby further improving the stability of the electrical conduction between the needle tube 1330 and the second electrical conduction area.

[0056] In some other examples, the angle between the central axis of the spring pin 130 and the printed circuit board 1210 may also be less than 90 degrees.

[0057] In some examples, a fixing member may be wrapped around the periphery of the spring pin 130 , and the fixing member may be fixedly connected to the printed circuit board 1210 .

[0058] In some examples, the fixing member can be fixed to the printed circuit board 1210 by bonding, welding or the like.

[0059] In some examples, a fixing piece may be wrapped around the needle tube 1330, and the fixing piece may be fixedly connected to the printed circuit board 1210. In this case, since the welding part is more susceptible to corrosion by water vapor, and the corrosion of the welding part by water vapor will reduce the welding strength between the needle tube 1330 and the second electrical conduction area and weaken the electrical conduction effect between the needle tube 1330 and the second electrical conduction area, by wrapping the fixing piece fixed to the printed circuit board 1210 around the spring pin 130, it is helpful to maintain the welding effect between the needle tube 1330 and the second electrical conduction area, and further maintain the stability of the electrical conduction effect between the needle tube 1330 and the second electrical conduction area.

[0060] In some examples, the fixing member may be made of a soft elastic material, such as silicone and rubber.

[0061] See also Figure 5In some examples, the needle shaft 1310 may have a bottom surface 1311 that is at an acute angle to the printed circuit board 1210. In other words, the bottom surface 1311 may be an inclined surface relative to the printed circuit board 1210. In this case, when the spring 1320 is compressed due to the first electrical conduction area abutting against the needle shaft 1310, a force deviating from the central axis of the spring needle 130 can be transmitted to the needle shaft 1310 through the bottom surface 1311, so that the needle shaft 1310 and the needle tube 1330 can be more closely attached after the connector assembly 110 and the base 120 are assembled, thereby further enhancing the electrical conduction effect between the sensing electrode 1110 and the printed circuit board 1210.

[0062] In some examples, the force points at both ends of the spring 1320 may be located on the central axis of the spring 1320. In this case, when the spring 1320 is compressed, the possibility of the spring 1320 deviating to both sides of its central axis can be reduced.

[0063] In some examples, when the sensing electrode 1110 is electrically connected to the printed circuit board 1210 , current may flow through the needle shaft 1310 , the side wall of the needle tube 1330 , and the bottom of the needle tube 1330 in the spring needle 130 .

[0064] In some examples, the welding method may be flat welding, which is suitable for the case where the bottom of the needle tube 1330 is relatively thin.

[0065] In some examples, the welding method may be fillet welding, which is suitable for the case where the bottom of the needle tube 1330 is thicker or the side wall of the needle tube 1330 is welded to the printed circuit board 1210 .

[0066] See also Figure 6 In some examples, the weld height h on the side of the weld near the bottom surface 1311 may be greater than the weld height h on the side away from the bottom surface 1311. In this case, when the angle between the bottom surface 1311 of the needle shaft 1310 and the printed circuit board 1210 is an acute angle, the force applied by the spring 1320 to the needle shaft 1310 is always biased toward the side of the weld near the bottom surface 1311. By making the weld height h on the side near the bottom surface 1311 greater than the weld height h on the side away from the bottom surface 1311, the welding strength on the side of the weld near the bottom surface 1311 can be improved, thereby improving the stability of the needle tube 1330 and the second electrical conduction area at the weld, thereby improving the stability of the electrical conduction between the needle tube 1330 and the second electrical conduction area.

[0067] It should be noted that in the fillet welding method, the weld height h refers to the distance from the right angle point of the right triangle to the hypotenuse (see Figure 6 ).

[0068] In other examples, the angle between the bottom surface 1311 of the needle shaft 1310 and the printed circuit board 1210 may also be 0 degrees. In other words, the bottom surface 1311 may be a horizontal surface relative to the printed circuit board 1210. In this example, the contact point between the spring 1320 and the bottom surface 1311 of the needle shaft 1310 may deviate from the central axis of the spring needle 130. Thus, the needle shaft 1310 and the needle tube 1330 can be more closely fitted after the connector assembly 110 and the base 120 are assembled.

[0069] See also Figure 2 In some examples, the connector assembly 110 may further include a seal 1120 .

[0070] Figure 7 1 is a schematic diagram showing a structure in which the sealing member 1120 according to an example of the present invention partially covers the sensing electrode 1110. In order to better illustrate the positional relationship between the sealing member 1120 and the sensing electrode 1110, Figure 7 Parts and lines that may cause misunderstanding or affect the description are omitted.

[0071] See also Figure 7 In some examples, the connector assembly 110 may further include a seal 1120 partially covering the sensing electrode 1110 . In other words, the seal 1120 may partially cover the sensing electrode 1110 .

[0072] In some examples, seal 1120 can cover an upper portion of the body of sensor electrode 1110 .

[0073] See also Figure 7 In some examples, the seal 1120 may have a through hole 1121 through which the spring pin 130 passes to contact the first electrical conduction area. In this case, on the one hand, since the spring pin 130 is restricted by the through hole 1121, even if the coupling between the needle shaft 1310 and the second electrical conduction area is not stable enough after long-term use or unexpected external force, the seal 1120 can reduce the risk of the spring pin 130 being offset, thereby improving the stability of the electrical conduction between the sensing electrode 1110 and the printed circuit board 1210; on the other hand, the seal 1120 can play a certain sealing role on the sensing electrode 1110 and the spring pin 130, thereby improving the waterproof performance of the electrical conduction circuit.

[0074] In some examples, the number of spring pins 130 may be equal to the number of contacts, and the number of through holes 1121 may be equal to the number of spring pins 130. For example, when the sensing electrode 1110 includes a counter electrode, a working electrode, and a reference electrode, the number of contacts may be three, and the number of spring pins 130 and through holes 1121 is also three.

[0075] In some examples, the needle shaft 1310 may protrude from the contact surface between the seal 1120 and the sensing electrode 1110. The contact surface may refer to the surface on the seal 1120 that contacts the sensing electrode 1110. In other words, the height of the needle tube 1330 may be less than the depth of the through hole 1121, and the height of the spring needle 130 may be greater than the depth of the through hole 1121. In this case, when the connector assembly 110 is assembled with the base 120, the spring 1320 can be stably compressed, thereby improving the stability of the spring needle 130 being electrically connected to the first electrical conduction area and the second electrical conduction area, respectively.

[0076] See also Figure 7 In some examples, the end of the through hole 1121 near the welding position may have a depression 1122 along the aperture direction. In other words, the aperture of the through hole 1121 may be slightly larger at the end near the welding position. In this case, the through hole 1121 can better accommodate the spring pin 130 and the welding position of the needle tube 1330 and the second electrical conductive area, thereby improving the stability of the welding position of the needle tube 1330 and the second electrical conductive area.

[0077] In some examples, the seal 1120 may be made of a silicone material. The hardness of the silicone material may be 10 to 65 degrees. In this case, it is advantageous to prevent the seal 1120 from being too soft or too hard, thereby improving the stability of the assembly of the connector assembly 110 and the base 120. In the present invention, the hardness may specifically refer to the Shore A hardness.

[0078] In some examples, the hardness of the silicone material may also be less than 10 degrees or greater than 65 degrees.

[0079] In some examples, seal 1120 may also be made of a plastic material.

[0080] Although the utility model is specifically described above in conjunction with the accompanying drawings and examples, it is to be understood that the above description does not limit the utility model in any form. Those skilled in the art can modify and change the utility model as needed without departing from the essential spirit and scope of the utility model, and these modifications and changes all fall within the scope of the utility model.

Claims

1. A biological monitoring device with stable electrical conduction, characterized in that: The invention comprises a connection seat assembly, a base and a spring needle, wherein a sensing electrode capable of generating an electrical signal is arranged on the connection seat assembly and the sensing electrode has a first electrical conduction area, a printed circuit board for processing the electrical signal is arranged on the base and the printed circuit board has a second electrical conduction area, the connection seat assembly can be detachably assembled to the base, the spring needle comprises a needle shaft, a spring and a needle tube, the spring is arranged in the needle tube, one end of the needle shaft protrudes from the needle tube and the other end of the needle shaft abuts against the spring, the needle shaft can be restorably moved on the needle tube under the action of the spring, and when the connection seat assembly is assembled with the base, the needle shaft contacts the first electrical conduction area, the needle tube contacts the second electrical conduction area and the spring is compressed.

2. The biological monitoring device with stable electrical conduction according to claim 1, characterized in that: The needle tube is coupled to the second electrical conductive area by welding.

3. The biological monitoring device with stable electrical conduction according to claim 2, characterized in that: The included angle between the central axis of the spring pin and the printed circuit board is 90 degrees.

4. The biological monitoring device with stable electrical conduction according to claim 3, characterized in that: A fixing piece is wrapped around the periphery of the spring pin, and the fixing piece is fixedly connected to the printed circuit board.

5. The biological monitoring device with stable electrical conduction according to claim 2, characterized in that: The connection base assembly further includes a sealing member partially covering the sensing electrode, wherein the sealing member has a through hole for the spring pin to pass through so as to contact the first electrical conduction area.

6. The biological monitoring device with stable electrical conduction according to claim 5, characterized in that: The sealing member is made of a silicone material having a hardness of 10 to 65 degrees.

7. The biological monitoring device with stable electrical conduction according to claim 3, characterized in that: The needle shaft has a bottom surface which forms an acute angle with the printed circuit board.

8. The biological monitoring device with stable electrical conduction according to claim 7, characterized in that: The welding method is fillet welding, and the height of the weld on the side close to the bottom surface of the welding point is greater than the height of the weld on the side away from the bottom surface.

9. The biological monitoring device with stable electrical conduction according to claim 5, characterized in that: The needle shaft protrudes from the contact surface between the sealing component and the sensing electrode.

10. The biological monitoring device with stable electrical conduction according to claim 5, characterized in that: One end of the through hole close to the welding position has a depression along the hole diameter direction.

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