Electrocardiograph lead wire

Abstract

The utility model provides an electrocardiograph lead wire which comprises an injection-molded wrapping piece, a positioning piece embedded in the wrapping piece and a circuit assembly, the circuit assembly comprises at least two defibrillation resistors, the positioning piece is insulated, the at least two defibrillation resistors are separated by the positioning piece, and the positioning piece is used for fixing the circuit assembly in the injection molding process. According to the electrocardiograph lead wire provided by the utility model, before injection molding, the positioning piece and the circuit assembly are fixed, and during injection molding, the mold strip of the mold is only matched with the positioning piece and does not touch components such as a defibrillation resistor in the circuit assembly, so that the components of the circuit assembly are prevented from being damaged; and the yield of product processing can be improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of medical devices, and particularly relates to an electrocardiograph lead wire. Background Art

[0002] An electrocardiograph can be used to detect the physiological functions of the human heart. By measuring the potential differences at various parts of the human body through chest leads and limb leads, the obtained electrocardiogram waveform reflects the situation of the human heart. This circuit connection method for recording an electrocardiogram is called an electrocardiograph lead. A lead wire is an important component that works with an electrocardiograph and is usually obtained by an injection molding process. However, affected by the injection molding processing conditions during the processing, it is difficult to accurately control the positions of the important components of the lead wire, and the inability to accurately control the positions may cause damage to the functions of the components, resulting in a low yield rate of the product. Summary of the Utility Model

[0003] The technical object of the utility model is to provide an electrocardiograph lead wire, aiming at the problems that it is difficult to accurately control the positions of the electronic components in the lead wire and it is easy to have defective products during the processing.

[0004] To solve the above technical problems, the utility model is realized as follows. An electrocardiograph lead wire includes: an injection-molded coating member, a positioning member embedded in the coating member, and a circuit assembly. The circuit assembly includes at least two defibrillation resistors. The positioning member is insulated, and the at least two defibrillation resistors are separated by the positioning member. The positioning member is used to fix the circuit assembly during the injection molding process and prevent the mold from damaging the circuit assembly.

[0005] Further, the positioning member includes positioning posts extending into the housing body. Positioning holes are formed in the positioning posts and are used for inserting the mold bars of the mold during the injection molding process to achieve positioning.

[0006] Further, the circuit assembly further includes a circuit board fixed in the coating member. Each defibrillation resistor is electrically connected to the circuit board, and the positioning member is in snap-fit connection with the circuit board.

[0007] Further, the positioning member includes a main body portion and a vertical plate connected to the main body portion. Mounting holes adapted to the shape of the vertical plate are formed in the circuit board. The vertical plate passes through the mounting holes to cooperate with and fix the circuit board. The main body portion abuts against the circuit board, and each defibrillation resistor is respectively located on one side of the circuit board away from the main body portion.

[0008] Further, adjacent defibrillation resistors are separated by the corresponding vertical plates.

[0009] Further, the circuit assembly further includes a wire connected to the circuit board. The positioning member is further provided with a positioning groove adapted to the wire, and the wire passes through the positioning groove and extends outside the coating member.

[0010] Further, the wire includes a plurality of cables arranged at intervals, and the positions and quantities of the cables are adapted to the positioning grooves.

[0011] Further, the coating member is a structure formed by multiple injection molding processes.

[0012] Further, a label portion is further provided on the outer peripheral side of the coating member, the outlet of the positioning hole is located on the label portion, and the label portion is used for pasting labels.

[0013] Compared with the prior art, the electrocardiograph lead wire of the present utility model has the beneficial effects that: the positioning member can position and fix the circuit assembly during the injection molding process of the coating member. By separating and fixing the components such as defibrillation resistors in the circuit assembly through the positioning member, precise control of the positions of the components in the lead wire is achieved, which can effectively prevent the defibrillation resistors and other devices from being damaged due to being bumped by the mold, and avoid the circuit from being damaged, thereby effectively improving the yield rate of the production and processing of the lead wire. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 is a schematic diagram of the overall structure of the electrocardiograph lead wire in an embodiment of the present utility model;

[0015] Figure 2 is a schematic diagram of a partial structure of the electrocardiograph lead wire in an embodiment of the present utility model;

[0016] Figure 3 is a schematic diagram of the overall structure of the positioning member in an embodiment of the present utility model;

[0017] Figure 4 is a schematic diagram of the processing flow of the electrocardiograph lead wire in an embodiment of the present utility model.

[0018] In the drawings, each reference numeral represents: 1, coating member; 11, first rubber-coated portion; 12, second rubber-coated portion; 13, label portion; 2, positioning member; 21, main body portion; 22, vertical plate; 23, positioning post; 231, positioning hole; 24, positioning groove; 3, circuit assembly; 31, circuit board; 32, defibrillation resistor; 33, cable. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0019] The embodiments of the present utility model will be described in detail below. The examples of the embodiments are shown in the drawings, wherein the same or similar reference numerals represent the same or similar elements or elements with the same or similar functions from beginning to end. The embodiments described below with reference to the drawings are exemplary and are intended to explain the present utility model, and should not be construed as limiting the present utility model. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without making creative efforts belong to the scope of protection of the present utility model.

[0020] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "circumferential", "radial", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present utility model.

[0021] In addition, the terms "first" and "second" are only used for descriptive purposes and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present utility model, the meaning of "a plurality" is two or more, unless otherwise specifically defined.

[0022] Embodiment:

[0023] As Figures 1-4 shown, in this embodiment, the electrocardiograph lead wire includes: an injection-molded coating member 1, a positioning member 2 embedded in the coating member 1, and a circuit assembly 3. The circuit assembly 3 includes at least two defibrillation resistors 32. The positioning member 2 is insulated, and the at least two defibrillation resistors 32 are separated by the positioning member 2. The positioning member 2 is used to fix the circuit assembly 3 during the injection molding process and prevent the injection mold from damaging components such as the defibrillation resistors 32 in the circuit assembly 3.

[0024] Specifically, the positioning member 2 can position and fix the circuit assembly 3 when the coating member 1 is injection molded. By using the positioning member 2 to separate and fix the easily interfered components such as the defibrillation resistors 32 in the circuit assembly 3, precise control of the positions of the electronic components in the lead wire is achieved. During the processing, only the die bar of the mold cooperates with the positioning member 2 for fixation, which can effectively prevent components such as the defibrillation resistors 32 from being damaged by the mold, thereby effectively improving the yield rate of the production and processing of the lead wire.

[0025] In this embodiment, as Figure 3As shown, the positioning member 2 includes a positioning post 23 extending into the housing. A positioning hole 231 is formed in the positioning post 23 and is used for inserting a mold bar of the mold during the injection molding process to achieve positioning and fixing. The top end of the positioning post 23 passes through the covering member 1 and is exactly flush with the outer side surface of the covering member 1. The outlet of the positioning hole 231 is exposed on the surface of the covering member 1. The positioning member 2 can be set as a shell-shaped skeleton. Before the injection molding process, the circuit assembly 3 as a whole can be fixed to the positioning member 2 first. Multiple positioning posts 23 can be arranged at intervals. For example, four positioning posts 23 can be arranged around the outer periphery of the side of the positioning member 2 facing the circuit assembly 3. During the injection molding process, the mold bars of the mold can be accurately inserted into the corresponding positioning holes 231, thereby avoiding the injection mold from touching components such as the defibrillation resistor 32 and also preventing the mold from damaging the components.

[0026] Furthermore, as Figure 3 and 4 shown, in this embodiment, the top end of the positioning post 23 passes through the covering member 1 and is exactly flush with the outer side surface of the covering member 1. The outlet of the positioning hole 231 is exposed on the surface of the covering member 1. During the injection molding process, the four mold bars of the mold are respectively inserted into the corresponding four positioning holes 231 to be fixed with the positioning holes 231, so as to achieve accurate positioning of the circuit assembly 3 and the positioning member 2. A label portion 13 is also provided on the outer peripheral side of the covering member 1. The outlet of the positioning hole 231 is located on the label portion 13. The label portion 13 is used for pasting a label. When the label is pasted on the label portion 13, the label can exactly cover the positioning hole 231, improving the aesthetics of the lead wire. In some embodiments, the outlet of the positioning hole 231 can be located inside the positioning member 2 (the side for assembling the circuit assembly, as Figure 3 and 4 shown) or outside. Preferably, the outlet of the positioning hole 231 is arranged outside the positioning member 2 (not shown). Such an arrangement can ensure that components such as the circuit assembly 3 are completely wrapped, reduce the risk of damaging the defibrillation resistor 32 during the process, and the subsequent ESD test safety is much higher.

[0027] In this embodiment, the covering member 1 is a structure formed by multiple injection molding processes. That is, the covering member 1 can be obtained by using the processing method of multiple injection molding. In a specific embodiment, the covering member 1 includes a first encapsulation portion 11 and a second encapsulation portion 12. The first encapsulation portion 11 surrounds the outer periphery of the positioning member 2 and fills and cures the gap between the circuit assembly 3 and the positioning member 2, so as to firmly fix the circuit assembly 3 and protect the components in the circuit assembly 3. The second encapsulation portion 12 surrounds the outer periphery of the first encapsulation portion 11, enabling the lead wire to be set into different shapes according to actual needs. As Figure 4As shown, the specific processing of the electrocardiograph lead wire in this embodiment can be roughly carried out by the following steps: Step 1, fix the circuit assembly 3 and the positioning member 2. Step 2, fix the circuit assembly 3 and the positioning member 2 as a whole on the injection molding equipment for the first injection molding process to obtain the first rubber-coated part 11. Step 3, perform the second injection molding process to obtain the second rubber-coated part 12, that is, obtain the desired electrocardiograph lead wire.

[0028] In this embodiment, the circuit assembly 3 further includes a circuit board 31 fixed in the covering member 1, each defibrillation resistor 32 is electrically connected to the circuit board 31, and the positioning member 2 is engaged with the circuit board 31. The positioning member 2 is a shell-shaped frame, and a receiving groove is formed on the positioning member 2. Before the injection molding process, the circuit board 31 can be fixed in the receiving groove, and the positioning column 23 can be arranged on the outer peripheral side of the circuit board 31, so that the circuit board 31 can be accurately fixed to the positioning member 2, and the positioning effect is good.

[0029] Further, in this embodiment, the positioning member 2 includes a main body 21 and a vertical plate 22 connected to the main body 21, a mounting hole matching the shape of the vertical plate 22 is opened on the circuit board 31, the vertical plate 22 passes through the mounting hole and is fixed to the circuit board 31, the main body 21 abuts against the circuit board 31, and each defibrillation resistor 32 is respectively located on a side of the circuit board 31 away from the main body 21. The receiving groove is formed by the main body 21, the vertical plate 22 is connected and fixed to the bottom of the receiving groove, the circuit board 31 passes through the vertical plate 22 and is fixed in the receiving groove, and each defibrillation resistor 32 is respectively connected to a side of the circuit board 31 away from the bottom of the receiving groove.

[0030] In this embodiment, adjacent defibrillation resistors 32 are separated by corresponding vertical plates 22. The height of the vertical plates 22 is greater than the thickness of the circuit board 31. The vertical plates 22 can not only limit the circuit board 31, but also separate the defibrillation resistors 32, thereby preventing the defibrillation resistors 32 from being misplaced, and preventing the defibrillation resistors 32 from contacting each other and damaging the circuit, and making the assembly between the positioning member 2 and the circuit assembly 3 more compact, thereby making the lead wire volume smaller and the appearance more beautiful. Of course, in some other embodiments, the positioning member 2 can also be provided with other separate components to position each defibrillation resistor 32, which is not limited here.

[0031] In this embodiment, the circuit assembly 3 further includes a wire connected to the circuit board 31. The positioning member 2 is further provided with a positioning groove 24 adapted to the wire. The wire passes through the positioning groove 24 and extends outside the covering member 1. The positioning groove 24 communicates with the receiving groove. The wire may include a connecting wire electrically connected to the circuit board 31 and a rubber coating member provided on the outer periphery of the connecting wire. The shape of the positioning groove 24 exactly matches the shape of the rubber coating member. When the circuit assembly 3 is inserted into the receiving groove of the fixing member, the wire can be exactly engaged with the positioning groove 24, so that the position of the wire can be accurately positioned. Further, the wire includes a plurality of cables 33 arranged at intervals. The plurality of cables 33 may be a main cable and a plurality of branch cables respectively. The position and number of the cables 33 are adapted to the positioning groove 24. For example, specifically, 1 main cable and 6 branch cables may be provided according to the usage requirements of the lead wire. The corresponding positioning grooves 24 can evenly separate and fix the cables 33, so that the positions of the cables 33 can be accurately controlled, making the processed lead wire more beautiful. During implementation, the specific number and size of the cables 33 can be determined according to actual requirements and are not limited herein.

[0032] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, and improvements made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. An electrocardiograph lead wire, characterized in that, It includes an injection-molded covering, a positioning member embedded in the covering, and a circuit component, wherein the circuit component includes at least two defibrillation resistors, the positioning member is insulated, and at least two defibrillation resistors are separated by the positioning member. The positioning member is used to fix the circuit component during the injection molding process and prevent the injection mold from damaging the circuit component.

2. The electrocardiograph lead wire according to claim 1, characterized in that, The positioning member comprises a positioning column extending toward the inside of the housing, wherein a positioning hole is formed in the positioning column, and the positioning hole is used for inserting a mold strip of a mold to achieve positioning during the injection molding process.

3. The electrocardiograph lead wire according to claim 1, characterized in that, The circuit assembly also includes a circuit board fixed in the covering member, each of the defibrillation resistors is electrically connected to the circuit board, and the positioning member is engaged with the circuit board.

4. The electrocardiograph lead wire according to claim 3, characterized in that, The positioning member includes a main body and a vertical plate connected to the main body. The circuit board is provided with a mounting hole adapted to the shape of the vertical plate. The vertical plate passes through the mounting hole and is fixed to the circuit board. The main body abuts against the circuit board, and each defibrillation resistor is located on a side of the circuit board away from the main body.

5. The electrocardiograph lead wire according to claim 4, wherein, Adjacent defibrillation resistors are separated by corresponding vertical plates.

6. The electrocardiograph lead wire according to claim 4, characterized in that, The circuit assembly also includes a wire connected to the circuit board, and the positioning member is also provided with a positioning groove adapted to the wire, and the wire passes through the positioning groove and extends to the outside of the covering member.

7. The electrocardiograph lead wire according to claim 6, characterized in that, The conductor includes a plurality of cables arranged at intervals, and the positions and quantities of the cables are adapted to the positioning grooves.

8. The electrocardiograph lead wire according to claim 1, characterized in that, The covering piece is a structure formed by multiple injection molding.

9. The electrocardiograph lead wire according to claim 2, characterized in that, A label portion is also provided on the outer peripheral side of the covering member, an outlet of the positioning hole is located on the label portion, and the label portion is used for attaching a label.

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