CN220553617U - Banana plug and electrocardio lead wire - Google Patents

Abstract

The application discloses a banana plug and an electrocardio lead wire, wherein the banana plug comprises a shell, a plug main body and an external conductive piece; the shell comprises a fixing hole; the plug main body comprises a fixing part which is fixedly connected in the fixing hole; the fixed part is provided with a limiting surface; wherein, the limit surface and the inner wall surface of the fixed hole interfere with each other in the radial direction of the fixed hole; the external conductive piece is welded with one end of the plug main body, which is provided with the fixing part. Through above-mentioned mode, the banana plug can be fixed to this application to reduce plug main part and shell pivoted condition, thereby make the plug main part be difficult for taking place the fracture with the junction of external conductive piece, reduce the inside bad condition of contact of banana plug, with the reliability that improves the banana plug.

Description

Banana plug and electrocardio lead wire

Technical Field

The application relates to the technical field of plugs, in particular to a banana plug and an electrocardio lead.

Background

Banana plugs can be used in high power equipment devices because of their plug electrode surface pico-drums, because the electrode surface has a large contact area. The banana plug is gradually applied to industries such as industrial instruments, teaching instruments, power tests, radio models, medical instruments and the like by virtue of excellent electrical performance, a simple assembly mode and low-cost finished products.

In recent years, banana plugs are usually connected to an electrocardiograph lead wire matched with an electrocardiograph monitor, but in the use process of the banana plugs, the banana plugs are usually subjected to large external force rotation and plugging, so that internal elements are easy to twist off and shift, and poor contact of the banana plugs is caused.

Disclosure of Invention

The technical problem that this application mainly solves is to provide banana plug and electrocardio lead line, can fix the plug main part to reduce the plug main part relative to shell pivoted condition, thereby make the plug main part difficult emergence fracture with the junction of external conductive piece, reduce the inside poor condition of contact of banana plug, with the structural stability and the reliability that improves the banana plug.

In order to solve the technical problem, a technical scheme that this application adopted is to provide a banana plug, and this plug includes:

the shell comprises a fixing hole;

the plug main body comprises a fixing part which is fixedly connected in the fixing hole. The fixed part is provided with a limiting surface. Wherein, the limit surface and the inner wall surface of the fixed hole interfere with each other in the radial direction of the fixed hole.

And the external conductive piece is welded with one end of the plug main body, which is provided with the fixing part.

In some embodiments, the limiting surface is disposed in a plane, the limiting surface intersecting a radial direction of the fixation hole.

In some embodiments, the number of the limiting surfaces is two, and the two limiting surfaces are opposite and parallel to the axial direction of the fixing hole.

The fixing part comprises two protruding sections. Two ends of each protruding section are connected with two limiting surfaces to form four rotation stopping edges.

The shape of the fixing part is matched with the shape of the fixing hole, so that the shell is matched with the fixing part.

In some embodiments, the fixing portion further includes a first limiting section, a second limiting section, and a third limiting section, the second limiting section is located between the first limiting section and the third limiting section, and connects the first limiting section and the third limiting section. The limiting surface is at least arranged on one of the first limiting section, the second limiting section and the third limiting section.

The second limiting section is sunken or protruding relative to the first limiting section and the third limiting section, and the shell wraps and fits the third limiting section, the second limiting section and part of the first limiting section.

In some embodiments, the second limiting section is recessed relative to the first limiting section and the third limiting section to form a limiting groove, the shell sleeve is further provided with a limiting protrusion protruding inside the fixing hole, and the limiting protrusion is arranged in the limiting groove.

The limiting surface is arranged on the outer peripheral surface of the third limiting section. And one side of the third limiting section, which is opposite to the second limiting section, is connected with an external conductive piece.

In some embodiments, the fixing portion is provided with a welding cup extending toward one end of the fixing hole. The welding cup is provided with a connecting welding groove. The external conductive piece is welded with the welding cup in the connecting welding groove.

In some embodiments, the shell further comprises a receiving cavity connected to the securing aperture. The external conductive piece is arranged in the accommodating cavity and further comprises a resistor and a wire body.

Wherein, the resistor is arranged in the accommodating cavity. The resistor comprises a welding wire which is placed in the connecting welding groove and welded with the welding cup. One end of the wire body is connected with the tail end of the resistor opposite to the fixing part, and the other end extends out of the accommodating cavity.

In some embodiments, the banana plug further includes an insulating protective cap and a dome that fit over the plug body.

Wherein, insulating helmet sets up the terminal with fixed part opposite at the plug main part.

The shell fragment sets up on the plug main part, and is located between fixed part and the insulating helmet.

In some embodiments, the plug main body is provided with a protruding portion protruding at one end far away from the fixing portion, and the insulating protective cap is correspondingly provided with a fixing groove adapted to the protruding portion, and is fixed on the plug main body through the protruding portion and the fixing groove.

In some embodiments, the shell comprises an inner sleeve and an outer sleeve surrounding the inner sleeve, the inner sleeve surrounds the fixing portion, and the surrounding portion is externally connected with the conductive member and is in adaptive contact with the fixing portion.

In order to solve the technical problem, another technical scheme adopted by the application is to provide an electrocardiograph lead, wherein the electrocardiograph lead comprises the banana plug.

The beneficial effects of this application are: in the circumstances of prior art, this application is equipped with the fixed part through being equipped with in the plug main part in banana plug, and the fixed part is provided with spacing face, and the internal face of spacing face and shell's fixed orifices mutually interfere in the radial of fixed orifices, so that the fixed part can't rotate for the shell along the radial of fixed orifices because of the stop of spacing face, thereby fixed plug main part, make the plug main part difficult emergence fracture with the junction part of external electrically conductive piece, thereby reduce banana plug poor contact's condition, in order to improve banana plug's structural stability and reliability.

Drawings

FIG. 1 is a schematic diagram of an embodiment of an electrocardiograph lead of the present application;

FIG. 2 is a schematic cross-sectional view of the embodiment of the cardiac electrical lead shown in FIG. 1, taken along section line A-A;

FIG. 3 is a schematic diagram of a portion of the components of an embodiment of an electrocardiograph lead of the present application;

FIG. 4 is a schematic view of the embodiment of the cardiac electrical lead shown in FIG. 1, taken along section line B-B;

FIG. 5 is an exploded view of a portion of the components of the embodiment of the cardiac electrical lead shown in FIG. 3;

fig. 6 is a schematic view of the structure of a portion of the elements of the embodiment of the cardiac electrical lead shown in fig. 3, taken along section line C-C.

Detailed Description

The following description of the technical solutions in the embodiments of the present application will be made clearly and completely with reference to the accompanying drawings in the embodiments of the present application, and it is apparent that the described embodiments are only some embodiments of the present application, not all embodiments. All other embodiments, which can be made by one of ordinary skill in the art without undue burden from the present disclosure, are within the scope of the present disclosure.

In recent years, the banana plug is usually connected to an electrocardiograph lead wire matched with an electrocardiograph monitor, but in the use process, the banana plug is usually twisted off when being plugged and pulled out by a large external force, so that poor contact occurs to internal elements. In order to solve the above-described problems, the present application proposes the following embodiments.

The following is an exemplary description of an electrocardiograph lead for an electrocardiograph lead embodiment.

As shown, the electrocardiograph lead 1 may include a banana plug 10, the banana plug 10 being configured to be plugged into a receptacle of a corresponding electrocardiograph device so that the electrocardiograph lead 1 can be connected to the corresponding electrocardiograph device.

As shown in fig. 1, banana plug 10 may include a shell 100, a plug body 200, and an external conductor 300, wherein plug body 200 and external conductor 300 are secured to each other and electrically connected inside shell 100. The plug main body 200 is used for being inserted into a jack of a corresponding electrocardiograph or other device, so as to electrically connect the external conductive member 300 with the device to which the plug main body 200 is connected.

As shown in fig. 2, the housing 100 may include a fixing hole 110. The plug main body 200 may include a fixing portion 210, and the fixing portion 210 is fixedly coupled in the fixing hole 110. The external conductive member 300 is welded to the end of the plug main body 200 where the fixing portion 210 is provided. By the form of welding, the external conductive member 300 can be more firmly connected with the plug main body 200, and the electrical connection between the external conductive member 300 and the plug main body 200 can be enhanced. The shell 100 wraps the fixing portion 210 and the welded portion of the external conductive member 300 and the plug main body 200 through the fixing hole 110, so that the external conductive member 300 and the plug main body 200 can be further fixed.

The shell 100 may be made of an insulating material, for example, rubber, plastic, or the like. The shell 100 can be held by a user to manipulate the banana plug 10, thereby increasing the safety of the banana plug 10.

In some embodiments, the shell 100 may include an inner housing 120 and an outer housing 130 surrounding the inner housing 120. The inner sleeve 120 can wrap the fixing portion 210 and the wrapping portion is externally connected to the conductive member 300, and is in contact with the fixing portion 210. The outer sleeve 130 may encapsulate a portion of the inner sleeve 120 and a portion of the external conductive member 300 extending from the inner sleeve 120, so that the outer sleeve 130 may further fix the inner sleeve 120 and the external conductive member 300, so that the external conductive member 300 is not easy to fall off from the inner sleeve 120, and the banana plug 10 is more stable in structure.

In some embodiments, as shown in fig. 2 and 3, an end of the fixing portion 210, which extends toward the fixing hole 110, may be provided with a welding cup 211. The bonding cup 211 may be provided with a connection bonding groove 212. The external conductive member 300 is welded to the bonding cup 211 in the connection groove 212.

Alternatively, the solder cup 211 is disposed in a semicircular shape, and a projection of the solder cup 211 in the extending direction of the plug main body 200 is in a semicircular shape. And the connecting soldering groove 212 is arranged at the center of the semicircular soldering cup 211 for placing the part of the external conductive member 300 which needs to be soldered with the banana plug 10. The semicircular welding cup 211 can increase the contact area between the external conductive piece 300 and the welding cup 211, so that the external conductive piece 300 and the banana plug 10 can be welded conveniently, and the external conductive piece 300 and the banana plug 10 can be welded more firmly.

In some embodiments, as shown in fig. 2 and 3, the shell 100 further includes a receiving cavity 140 connected with the fixing hole 110. The external conductive member 300 is disposed in the accommodating cavity 140, and the external conductive member 300 further includes a resistor 310 and a wire 320.

Wherein, the resistor 310 may be disposed in the accommodating cavity 140. The resistor 310 includes a bonding wire 311, and the bonding wire 311 may be placed in the connection groove 212 and bonded to the bonding cup 211 to increase the bonding strength of the resistor 310 and the bonding cup 211.

One end of the wire 320 may be connected to the end of the resistor 310 opposite to the fixing portion 210, and the other end extends out of the accommodating cavity 140. The wire 320 and the resistor 310 may be connected by welding, so that the wire 320 and the resistor 310 may be further fixed with respect to each other while the wire 320 and the resistor 310 are electrically connected.

Specifically, the inner shell 100 wraps the fixing portion 210, the resistor 310 and the part of the wire body 320, so as to wrap the welding portion between the fixing portion 210 and the resistor 310 and wrap the welding portion between the resistor 310 and the wire body 320, so that the connection structure of the fixing portion 210, the resistor 310 and the part of the wire body 320 can be further stabilized, the two welding portions are not easy to break in the using process of the banana plug 10, poor contact occurs among the fixing portion 210, the resistor 310 and the wire body 320, and the structural stability and the using stability of the banana plug 10 can be improved.

Alternatively, resistor 310 may be a defibrillation resistor to enable the cardiac electrical lead 1 to withstand the energy of a defibrillation pulse from an electrocardiograph device, thereby improving the reliability of the cardiac electrical lead 1.

Alternatively, the shell 100 may be formed by injection molding, so that the shell 100 is attached to the fixing portion 210, the resistor 310, and the portion of the wire body 320, so that the fixing portion 210, the resistor 310, and the portion of the wire body 320 can be better fixed, and the banana plug 10 is more stable.

In some embodiments, as shown in fig. 2 to 3, the fixing portion 210 may be provided with a limiting surface 213. Wherein the limiting surface 213 and the inner wall surface of the fixing hole 110 interfere with each other in the radial direction of the fixing hole 110. The axial direction of the fixing hole 110 is shown by an arrow D in fig. 2 and 3, and the radial direction of the fixing hole 110 is shown by an arrow E in fig. 2 and 3.

The limiting surface 213 is provided, so that the fixing portion 210 can be mutually matched with the shell 100, and the plug main body 200 is prevented from rotating relative to the shell 100 in the radial direction of the fixing hole 110, so that the plug main body 200 is fixed, the situation that the plug main body 200 rotates relative to the resistor 310, and the welding portion between the plug main body 200 and the resistor 310 is broken is reduced, the reliability and the structural stability of the banana plug 10 are improved, and the situation that the banana plug 10 is in poor contact is reduced.

Alternatively, the limiting surface 213 may be disposed in a plane, and the limiting surface 213 intersects with the radial direction of the fixing hole 110. This arrangement can simplify the processing process of the plug body 200, so that the stopper surface 213 is easily formed.

In some embodiments, as shown in fig. 2 to 4, the number of the limiting surfaces 213 may be two, and the two limiting surfaces 213 are opposite and parallel to each other and parallel to the axial direction of the fixing hole 110. The two limiting surfaces 213 are arranged in parallel with the axial direction of the fixing hole 110, so that the two limiting surfaces 213 are perpendicular to the radial direction of the fixing hole 110, and the two limiting surfaces 213 can better interfere with the inner wall surface of the fixing hole 110 in the radial direction of the fixing hole 110, thereby reducing the situation that the plug main body 200 rotates relative to the resistor 310 to break the welding part of the plug main body 200 and the resistor 310, and further improving the stability of the banana plug 10.

Further, the securing portion 210 may also include two raised sections 214. Two ends of each protruding section 214 are connected with two limiting surfaces 213 to form four rotation stopping edges 201. The extending directions of the four rotation stopping ribs 201 may be parallel to the axial direction of the fixing hole 110 as well so as to be perpendicular to the radial direction of the fixing hole 110. The shape of the fixing portion 210 may be adapted to the shape of the fixing hole 110, so that the shell 100 is adapted to fit the fixing portion 210. Thus, the four rotation stop ribs 201 can cooperate with the housing 100 to prevent the plug main body 200 from rotating relative to the housing 100 and the resistor 310 in the radial direction of the fixing hole 110.

Furthermore, the provision of two limiting surfaces 213 to form four stop edges 201 can also increase the stop effect of the fixing portion 210. The two limiting surfaces 213 are disposed opposite and parallel to each other, so that the four rotation stopping edges 201 can be uniformly distributed on the outer peripheral surface of the fixing portion 210, and the stress of the plug main body 200 is more uniform.

In an embodiment, as shown in fig. 2 to 3, the fixing portion 210 may include a first limiting section 216, a second limiting section 217 and a third limiting section 218, and the second limiting section 217 is located between the first limiting section 216 and the third limiting section 218 and connects the first limiting section 216 and the third limiting section 218.

Wherein, the second limiting section 217 is concave or convex relative to the first limiting section 216 and the third limiting section 218, and the shell 100 wraps and attaches the third limiting section 218, the second limiting section 217 and part of the first limiting section 216. By such arrangement, the first limiting section 216, the second limiting section 217 and the third limiting section 218 can cooperate with the shell 100, so that the plug main body 200 is not easy to move or even fall off in the fixing hole 110 on the axis of the fixing hole 110 under the action of external force.

Alternatively, the limiting surface 213 may be disposed at least on one of the first limiting section 216, the second limiting section 217 and the third limiting section 218. In the same way, the protruding section 214 may also be disposed on one of the first limiting section 216, the second limiting section 217 and the third limiting section 218, so that the limiting surface 213 and the protruding section 214 can form the rotation stopping edge 201 in the first limiting section 216, the second limiting section 217 or the third limiting section 218, thereby further preventing the plug main body 200 from rotating relative to the shell 100 and the resistor 310 in the radial direction of the fixing hole 110. By this arrangement, the space of the fixing portion 210 can be saved, and the manufacturing cost of the plug main body 200 can be reduced.

In some embodiments, the first limiting section 216, the second limiting section 217 and the third limiting section 218 may be sequentially ordered along the axial direction of the fixing portion 210, the first limiting section 216 may be connected to the welding cup 211, one end of the first limiting section 216 opposite to the welding cup 211 is connected to the second limiting section 217, and one end of the second limiting section 217 away from the first limiting section 216 is connected to the third limiting section 218.

Optionally, the second limiting section 217 may be recessed with respect to the first limiting section 216 and the third limiting section 218 to form a limiting groove 219, and the shell 100 further includes a limiting protrusion 310 protruding inside the fixing hole 110, where the limiting protrusion 310 is disposed in the limiting groove 219.

Therefore, when the plug body 200 receives the axial force of the fixing hole 110, the limiting protrusion 310 can block the first limiting section 216 and the third limiting section 218 from moving, thereby fixing the plug body 200, so that the plug body 200 is not easy to move relative to the shell 100 and the external conductive member 300.

Alternatively, the limiting surface 213 and the protruding section 214 may be disposed on the outer peripheral surface of the third limiting section 218 together, so as to form the rotation stopping rib 201 on the outer peripheral surface of the third limiting section 218. The third limiting section 218 is connected to the external conductive member 300 at a side opposite to the second limiting section 217. The limiting surface 213 is disposed on the third limiting section 218, so that the plug main body 200 can be conveniently prepared, and the limiting surface 213 can be conveniently formed. On the other hand, the limiting surface 213 is disposed on the third limiting section 218, so that the shell 100 completely wraps the limiting surface 213, and the limiting surface 213 can better play a role in limiting the fixed plug main body 200.

In other embodiments, the fixing portion 210 may be formed in other shapes, for example, a prism shape, a pyramid shape, an irregular shape, etc., and the specific shape of the fixing portion 210 is not limited in this embodiment.

In some embodiments, as shown in fig. 5 to 6, the banana plug 10 may further include an insulation protection cap 400 and a spring piece 500 that are sleeved on the plug body 200, wherein the insulation protection cap 400 is disposed at an end of the plug body 200 opposite to the fixing part 210. The spring piece 500 is disposed on the plug main body 200 and located between the fixing portion 210 and the insulation protection cap 400.

The insulation protective cap 400 is used for protecting the banana plug 10 in use so as to reduce the situation of electric leakage of the banana plug 10 in the misplug position. The insulating protective cap 400 may be a plastic cap, however, in other embodiments, the insulating protective cap 400 may be made of other insulating materials, and the specific limitation of the insulating protective cap 400 is not herein set.

Alternatively, the elastic piece 500 may surround the circumference of the plug body 200 for enabling the plug body 200 to be inserted into a corresponding socket by elastic deformation. The spring 500 is made of conductive material, and is capable of transmitting the electric energy of the plug main body 200 to the device to which the banana plug 10 is connected, for example, the spring 500 may be a copper sheet, a silver sheet, or the like.

Alternatively, the spring 500 may be a lantern spring 500, and the lantern spring 500 can increase the contact area of the plug body 200, so that the banana plug 10 can output high power current. Of course, in other embodiments, the spring 500 may be a diamond-shaped spring 500. The present embodiment is not specifically described herein.

In some embodiments, the plug main body 200 may have a protrusion 220 protruding from an end far from the fixing portion 210, and the insulation protection cap 400 is correspondingly provided with a fixing groove 410 corresponding to the protrusion 220, and the insulation protection cap 400 is fixed to the plug main body 200 through the protrusion 220 and the fixing groove 410. The insulating protective cap 400 may be fixed on the plug main body 200 by injection molding, and the protruding portion 220 and the fixing groove 410 are clamped with each other, so that the insulating protective cap 400 is not easy to fall from the plug main body 200.

In summary, according to the present application, the fixing portion 210 is disposed on the plug main body 200 in the banana plug 10, and the fixing portion 210 is provided with the limiting surface 213, and the limiting surface 213 and the inner wall surface of the fixing hole 110 of the shell 100 interfere with each other in the radial direction of the fixing hole 110, so that the fixing portion 210 cannot rotate relative to the shell 100 along the radial direction of the fixing hole 110 due to the blocking of the limiting surface 213, thereby fixing the plug main body 200, so that the connection portion between the plug main body 200 and the external conductive member 300 is not easy to break, and the poor contact condition of the banana plug 10 is reduced, so as to improve the structural stability and reliability of the banana plug 10.

The foregoing description is only exemplary embodiments of the present application and is not intended to limit the scope of the present application, and all equivalent structures or equivalent processes using the descriptions and the drawings of the present application, or direct or indirect application in other related technical fields are included in the scope of the present application.

Claims (11)

1. A banana plug, comprising:

the shell comprises a fixing hole;

the plug main body comprises a fixing part which is fixedly connected in the fixing hole; the fixed part is provided with a limiting surface; wherein the limiting surface and the inner wall surface of the fixing hole interfere with each other in the radial direction of the fixing hole;

and the external conductive piece is welded with one end of the plug main body, which is provided with the fixing part.

2. Banana plug as claimed in claim 1, characterised in that:

the limiting surface is arranged on a plane, and the limiting surface is intersected with the radial direction of the fixing hole.

3. Banana plug as claimed in claim 1, characterised in that:

the number of the limiting surfaces is two, and the two limiting surfaces are opposite and parallel and are parallel to the axis direction of the fixing hole;

the fixing part comprises two protruding sections; two ends of each protruding section are connected with two limiting surfaces to form four rotation stopping edges;

the shape of the fixing part is matched with the shape of the fixing hole, so that the shell sleeve is matched with the fixing part.

4. A banana plug as claimed in any one of claims 1 to 3, characterised in that:

the fixing part comprises a first limit section, a second limit section and a third limit section, wherein the second limit section is positioned between the first limit section and the third limit section and is connected with the first limit section and the third limit section; the limiting surface is at least arranged on one of the first limiting section, the second limiting section and the third limiting section;

the second limiting section is sunken or protruding relative to the first limiting section and the third limiting section, and the shell wraps and attaches the third limiting section, the second limiting section and part of the first limiting section.

5. Banana plug as claimed in claim 4, wherein:

the second limiting section is sunken relative to the first limiting section and the third limiting section to form a limiting groove, the shell is further provided with a limiting protrusion in a protruding mode in the fixing hole, and the limiting protrusion is arranged in the limiting groove;

the limiting surface is arranged on the outer peripheral surface of the third limiting section; and one side of the third limiting section, which is opposite to the second limiting section, is connected with the external conductive piece.

6. Banana plug as claimed in claim 1, characterised in that: a welding cup extends from one end of the fixing part facing the fixing hole;

the welding cup is provided with a connecting welding groove;

and the external conductive piece is welded with the welding cup in the connecting welding groove.

7. The banana plug as claimed in claim 6, wherein,

the shell also comprises a containing cavity connected with the fixing hole;

the external conductive piece is arranged in the accommodating cavity and further comprises a resistor and a wire body;

wherein the resistor is arranged in the accommodating cavity; the resistor comprises a welding wire which is arranged in the connecting welding groove and welded with the welding cup; one end of the wire body is connected with the tail end of the resistor opposite to the fixing part, and the other end of the wire body extends out of the accommodating cavity.

8. Banana plug as claimed in claim 1, characterised in that: the plug also comprises an insulating protective cap and a spring piece which are sleeved on the plug main body;

wherein the insulating protective cap is arranged at the end of the plug main body opposite to the fixing part;

the elastic sheet is arranged on the plug main body and is positioned between the fixing part and the insulating protective cap.

9. Banana plug as claimed in claim 8, wherein:

the plug main body is provided with a protruding portion in a protruding mode at one end away from the fixing portion, the insulation protective cap is correspondingly provided with a fixing groove corresponding to the protruding portion, and the insulation protective cap is fixed on the plug main body through the protruding portion and the fixing groove.

10. Banana plug as claimed in claim 1, characterised in that:

the shell comprises an inner sleeve body and an outer sleeve body wrapping the inner sleeve body, wherein the inner sleeve body wraps the fixing part, and the wrapping part is externally connected with the conductive piece and is in adaptive contact with the fixing part.

11. An electrocardiograph lead comprising the banana plug of any one of claims 1-10.