CN210156125U - Endoscope cable - Google Patents

Abstract

The utility model discloses an endoscope cable. The endoscope cable comprises a plurality of core wires and a protective layer sleeved outside the core wires. Wherein the core wire comprises: signal transmission lines, control lines and power lines; the signal transmission line comprises a first conducting wire and a second conducting wire which are insulated from each other; the second conducting wire is wound on the surface of the first conducting wire to form a plurality of continuous first winding units, and the distance between every two adjacent first winding units is 2-4 times of the width of the single first winding unit. The signal transmission line and the endoscope cable are bent, the actual width of the first winding units is increased based on the bending space, the bending resistance of the wire is effectively improved, and the wire can have a smaller wire diameter.

Description

Endoscope cable

Technical Field

The utility model relates to a wire rod field, in particular to endoscope cable.

Background

Endoscopes are detection devices that are widely used in the fields of medicine, fine industrial product assembly, and the like. It is usually probed through a set length of endoscope tube, down to a specific hole or other internal location.

Generally, the head of the endoscope is provided with various sensors such as an image pickup device to pick up information on the internal cavity. It is often necessary to use a corresponding endoscope cable to perform the functions of controlling and data transmission, etc. of the sensors of the endoscope.

Due to the particularities of the endoscope application, it is always desirable to be able to have as small a size as possible. However, the existing endoscope cables are generally large in size and cannot well meet the size requirement.

In addition, due to the complex environment and the bent pipeline which may exist in the probing process, if the endoscope tube body can have enough bending performance, the range of the probing application can be greatly expanded.

Unfortunately, optical fibers or coaxial cables used for image data transmission are characterized by being inflexible. Thus, it is difficult for an endoscope to be sufficiently flexible to traverse tortuous passages during an investigation.

The patent of application number 201220609213.0 provides a novel superstrong anti kink and tensile conductor wire of breaking, and it is specifically with the copper wire around connecing in the outside of preventing disconnected silk conductor, and the mode of wraparound is the screw thread rotation type wraparound mode.

Although the structure can improve the bending resistance of the conductive wire, the conductive wire can be repeatedly folded and bent more than millions of times. However, in an actual product, the use environment is complex and variable, and the bending mode and the bending frequency are different, so that the bending resistance of the actual product in a real environment has a larger difference from the bending resistance in a test environment.

Therefore, how to apply the structure of the conductive wire to the endoscope cable to improve the bending resistance and ensure the normal use of the endoscope cable is a technical problem that needs to be solved by those skilled in the art at present.

Disclosure of Invention

The utility model aims at providing an endoscope cable can solve one kind or the multiple problem that the endoscope cable exists among the prior art.

In a first aspect, an embodiment of the present invention provides an endoscope cable, which includes a plurality of core wires and a protective layer covering the core wires. Wherein the core wire comprises: signal transmission lines, control lines and power lines;

the signal transmission line comprises a first conducting wire and a second conducting wire which are insulated from each other; the second conducting wire is wound on the surface of the first conducting wire to form a plurality of continuous first winding units, and the distance between every two adjacent first winding units is 2-4 times of the width of the single first winding unit.

Further, the winding angle of the first winding unit is a clamp which forms an angle of 30-60 degrees with the first wire.

Further, the outer surface of the signal transmission line is coated with a protective layer, and the outer surface of the first lead and/or the second lead is coated with an insulating layer.

Further, the signal transmission line and the power line are wound side by side on the surface of the control line to form a plurality of continuous second winding units.

Further, the signal transmission line and the control line are wound side by side on the surface of the power line to form a plurality of continuous third winding units.

Further, the power line and the control line are wound side by side on the surface of the signal transmission line to form a plurality of continuous fourth winding units.

Further, the power line comprises a conductive core material with a set line diameter, an insulating layer coated outside the conductive core material and an isolating layer positioned between the insulating layer and the conductive core material.

Furthermore, the number of the signal transmission lines is 2, and the number of the control lines is 3; the signal transmission lines and the control lines are sequentially staggered and wound on the surface of the power line side by side.

Further, in the second winding unit, the pitch between the control line and the signal transmission line is 0.1-2 times the diameter of the control line.

Furthermore, 2 signal transmission lines and 3 control lines are wound on the surface of the power line for 2 to 3 layers, and the outer surface of each layer is coated with an insulating layer.

An embodiment of the utility model provides an endoscope cable, it uses side by side winding structural style, and is adjacent through control interval isoparametric between the first winding unit for will have sufficient space of buckling between each adjacent first winding unit, it is right when signal transmission line and endoscope cable buckle, will be based on the space of buckling increases the actual width of first winding unit.

In other words, when the signal transmission line and the endoscope cable are subjected to the bending operation, the wires have enough bending margin to offset the width increase requirement of the first winding unit for the bending operation, thereby improving the bending resistance of the wires.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without any creative effort.

Fig. 1 is a schematic structural diagram of a signal transmission line provided in an embodiment of the present invention.

Fig. 2a is a schematic structural view of an endoscope cable according to embodiment 1 of the present invention.

Fig. 2b is a schematic structural view of an endoscope cable according to embodiment 2 of the present invention.

Fig. 2c is a schematic structural view of an endoscope cable according to embodiment 3 of the present invention.

Fig. 3 is a schematic structural view of an endoscope cable according to embodiment 4 of the present invention.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

It is to be understood that the terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used in the specification and the appended claims, the singular forms "a", "an", and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise.

It should be further understood that the term "and/or" as used in the specification and the appended claims refers to any and all possible combinations of one or more of the associated listed items, and includes such combinations.

In an embodiment of the present invention, the endoscope cable is formed by a plurality of core wires and a protective layer covering the core wires.

The endoscope includes a signal transmission line for transmitting an image signal picked up by the endoscope, a control line for transmitting a control signal for controlling the image pickup device of the endoscope, and a power supply line for supplying power to the image pickup device of the endoscope, depending on the function performed by the core wire.

The protective layer is the protective case of parcel in the heart yearn outside, plays the function such as prevent that the heart yearn from haring, avoiding external impurity and moisture to invade. In some embodiments, the protection layer may further include an electromagnetic shielding layer on the inner sidewall to improve stability of internal signal transmission, so as to avoid the influence of electromagnetic interference.

Referring to fig. 1, fig. 1 is a schematic structural diagram of a signal transmission line according to an embodiment of the present invention, and as shown in the figure, the signal transmission line includes a first conductive wire a and a second conductive wire b that are insulated from each other.

The second wires b are wound on the surface of the first wires a to form a plurality of continuous first winding units. Since in this embodiment only one wire is wound side by side at the same angle. Therefore, the first winding unit 10 may be actually understood as a turn of the second wire b wound on the surface of the first wire a.

The spacing (denoted by f in fig. 1) between the first winding units is 2-4 times the width (denoted by e in fig. 1) of a single first winding unit.

In the embodiment of the present invention, the first winding unit is a repeatable minimum unit wound on the surface of the first wire, and the second wire b is wound at the same angle, thereby forming a regular winding body.

In some embodiments, the first conducting wire can be further twisted with an aramid fiber yarn with good elasticity and the like, and then the second conducting wire b is wound on the surface, and the aramid fiber yarn serves as a stress base material, so that the overall bending resistance is improved.

Compared with the prior art, the utility model discloses a core improves the part and lies in: the distance between the adjacent first winding units is 2-4 times of the width of the single first winding unit. So that there will be sufficient bending space between each adjacent first winding unit.

When bending the bending-resistant wire, since there is a large bending space between the adjacent first winding units, the actual width of the first winding units will be increased based on the bending space. In other words, when the signal transmission line is bent, the bending-resistant wire has enough bending margin to offset the requirement of the bending operation for increasing the width of the first winding unit.

In the anti-bending wire, the first winding units are repeated and continuous, and the distance between every two adjacent first winding units is 2-4 times of the width of each first winding unit, so that the whole signal transmission line has better anti-bending performance.

Generally, since the first winding units are formed by winding the second wires b, and the actual size of the wires is very small, the actual size of the first winding units is also very small, so that although the distance between adjacent first winding units is 2-4 times of the width of a single first winding unit, the distance between adjacent first winding units is also very small, and the signal transmission line is very long as a whole relative to the first winding units, so that the finally obtained signal transmission line has one bending space in all places in practice.

This is of great significance for the signal transmission line, which means that the bending-resistant wire as a whole has bending-resistant properties virtually everywhere, and no matter which part of the bending-resistant wire is bent, there is a corresponding bending space to buffer the requirement for the increase in width of the first winding unit.

Specifically, the distance between adjacent first winding units should not be too small, and should not be too large. If the spacing between adjacent first winding units is too small, it provides a small bending space, and the bending resistance may not be achieved. If the interval between the adjacent first winding units is too big, then the first wire itself of being connected between the adjacent first winding units can arrange to the lateral direction and this kind of wire distance overlength of arranging toward the lateral direction, when carrying out the bending operation, the wire of being connected between the adjacent first winding units will have great broken string risk, if this part wire takes place the broken string, also can cause the whole unable transmission signal of anti-bending wire rod, loses signal transmission function.

The utility model discloses through the experiment of the applicant numerous times prove, when interval between adjacent first winding unit is 2 ~ 4 times of first winding unit width, can guarantee to provide great space of buckling, reach anti buckling performance requirement, to the wire between the adjacent first winding unit, it is unlikely to toward the too much angle of transverse inclination simultaneously, and length is unlikely to the overlength, can avoid this part wire to take place the problem of broken string when buckling many times.

In a specific application scenario, the distance between the adjacent first winding units is 3 times of the width of the first winding units, in this case, the bending resistance of the whole wire rod is optimal, and not only can a sufficient bending space be ensured, but also the wire between the adjacent first winding units is not easy to break.

Through the embodiment of the utility model provides a signal transmission line is owing to set up a reasonable interval between adjacent first winding unit for anti bending wire rod is whole everywhere to have anti bending performance, even buckle many times to a certain position of anti bending wire rod, also can not take place the broken string problem, thereby has improved signal transmission line's whole anti bending performance.

Furthermore, the winding angle of the first winding unit and the first wire a form an included angle of 30-60 degrees. Since the first winding unit is formed by winding the second wire b around the first wire a, the winding angle of the first winding unit may also refer to the winding angle of the second wire.

If the first wire is horizontally arranged, when the second wire is wound around the first wire in the first winding unit, the included angle (acute angle) between the second wire and the horizontal line is the included angle with the first wire.

In the present application, the winding angle of the first winding unit should not be too large, nor too small. If the winding angle of the first winding unit is too large, the second conducting wire between the adjacent first winding units is close to the first conducting wire a, the conducting wire connecting the adjacent first winding units inclines to the horizontal direction, the bending resistance of the section of conducting wire is affected, if the winding angle of the first winding unit is too small, the wire of the first winding unit will incline to the horizontal direction, which affects the bending resistance of the wire of the first winding unit, therefore, when the winding angle is set, attention should be paid to the bending resistance of the wire between the first winding units and the bending resistance of the wire between the first winding units, proved by numerous experiments of the applicant, the winding angle is set to form an included angle of 30-60 degrees with the first lead, the wire rod can be ensured to keep better bending resistance on the whole without causing the reduction of the bending resistance of a certain part.

The embodiment of the utility model provides a signal transmission line has adopted the second wire winding on first wire, forms the structural style who accords with the first winding unit of settlement parameter standard, compares with traditional shielding double-wire pair, coaxial cable etc. has apparent advantage in anti bending performance and wire rod are bulky, the use occasion that is applicable to the endoscope that can be fine.

In some embodiments, in addition to adjusting the structure of the signal transmission line, similar modifications can be made to the structure of other core wires within the endoscope cable to further increase the kink resistance of the entire endoscope cable and reduce the wire diameter of the cable.

In addition, when such a structure is adopted, when the outer surface of the first conductor a and/or the second conductor b has an insulating layer (i.e., the first conductor and the second conductor are separated by the insulating layer), the signal transmission line can have an effect similar to a coaxial cable, which is beneficial to the transmission of high-frequency signals. Moreover, the problems that the coaxial cable is not resistant to bending and the diameter of the coaxial cable is thick are solved.

Fig. 2a to 2c are different embodiments of the endoscope cable according to the present invention, respectively. The outer surface of the signal transmission line may be further coated with a protective layer, so that the signal transmission line 101 is independent of the other power lines 103 and the control lines 102. In some embodiments, an electromagnetic shielding layer may be further disposed in the protective layer to ensure stability during signal transmission.

In some embodiments, the power line 103 includes a conductive core material having a predetermined line diameter, an insulating layer coated outside the conductive core material, and an isolation layer between the insulating layer and the conductive core material.

The specific selection of the power supply line 103 to be used may be determined according to the needs of the actual situation. For example, larger wire diameters have better electrical conductivity and reduce electromagnetic interference caused during power transmission through a suitable isolation layer.

Specifically, as shown in fig. 2a, in embodiment 1, the signal transmission line 101 and the power line 103 are wound side by side on the surface of the control line 102 to form a plurality of continuous second winding units. As shown in fig. 2b, in embodiment 2, the signal transmission line 101 and the control line 102 are wound side by side on the surface of the power line 103 to form a plurality of continuous third winding units. As shown in fig. 2c, in embodiment 3, the power line 103 and the control line 102 are wound side by side on the surface of the signal transmission line 101 to form a plurality of continuous fourth winding units.

It should be noted that one or more core wires can be selected and used as the main wire according to the needs of actual conditions, and the rest core wires are wound on the surface of the main wire to form corresponding winding units so as to obtain good bending resistance and reduce the volume of the wire.

Since the structures of the above-mentioned wires are similar, for the sake of convenience of presentation, the structure of the endoscope cable will be described in detail below taking the form shown in fig. 2b as an example. In the embodiment shown in fig. 2b, there are 2 signal transmission lines and 3 control lines.

As shown in fig. 2b, the signal transmission lines 101 and the control lines 102 are sequentially interleaved and wound side by side on the surface of the power line 103 to form a plurality of continuous second winding units 104.

Similar to the structural parameters of the first winding unit disclosed in the above embodiments, three structural parameters, namely the spacing between the second winding units, the winding angle, and the pitch between adjacent wires, need to be adaptively adjusted and controlled.

Among them, as for the pitch f of the adjacent second winding units 104, if the pitch between the adjacent second winding units 104 is too small, the bending space provided by it is small, and the requirement of the bending resistance may not be achieved. If the distance between the adjacent second winding units 104 is too large, the power lines 103 connected between the adjacent second winding units 104 are arranged in the lateral direction themselves and the distance between the wires arranged in the lateral direction is too long.

Thus, when the bending operation is performed, there is a large risk that the power supply line 103 connected between the adjacent second winding units 104 is disconnected, and the endoscope cable loses its intended function.

Experiments of the applicant prove that when the distance f between the adjacent second winding units 104 is 2-4 times of the width e of the second winding unit 104, a larger bending space can be provided to meet the requirement of bending resistance, and meanwhile, for the lead between the adjacent second winding units 104, the lead does not incline to a transverse direction by too much angle, the length of the lead is not too long, and the problem that the lead is broken when the lead is bent for many times can be avoided.

Regarding the winding angle of the second winding unit 104, if the winding angle of the second winding unit 104 is too large, the core wire between the adjacent second winding units 104 is close to the direction of the power supply wire 103, and the power supply wire 103 connecting the adjacent second winding units 104 is inclined to the horizontal direction, which affects the bending resistance of the section of the endoscope cable.

If the winding angle of the second winding unit 104 is too small, the core wire of the second winding unit 104 will incline to the horizontal direction, which affects the bending resistance of the wire of the second winding unit 104 itself, so when setting the winding angle, the bending resistance of the core wire (101,102) of the second winding unit 104 itself should be paid attention to, and the bending resistance of the power supply wire 103 between the second winding units 104 should be ensured.

Experiments of the applicant prove that the winding angle is set to form an included angle of 30-60 degrees with the power line, so that the wire can be guaranteed to keep better bending resistance on the whole, and the bending resistance of a certain part cannot be reduced.

Further, in the above-described embodiment, the spacing between the adjacent second winding units 104 is defined, which can provide the wire with the bending resistance at these places. However, when the wire is bent, the specific bending position is variable, if the pitch between the adjacent core wires (101,102) is small, the first winding unit 102 will start to loosen the wire from the wires at the two ends (due to the bending space between the adjacent second winding units 104), and the wire in the middle of the second winding unit 104 will not loosen the wire in time due to the too small pitch, and still be in the original structure, and the acting force caused by bending cannot be buffered, which may cause the wire in the middle to break,

the embodiment of the present invention needs to optimize the structure of the second winding unit 104. In other words, when the wire is bent, the width of the second wire in the second winding unit 104 is increased, so that the second winding unit 104 itself has certain bending resistance,

in order to achieve the effect, the embodiment of the present invention defines the pitch between the adjacent second wires, specifically, in the second winding unit 104, the pitch between the adjacent core wires (101,102) is 0.1-2 times of the core wire diameter, so that the second winding unit 104 itself has a bending space. That is, when the wire is bent, the second winding unit 104 provides a bending space for the adjacent core wires due to a certain gap between the core wires, so that the second winding unit 104 itself has a certain bending resistance.

Of course, the pitch is not arbitrarily set. Too small a pitch can lead to an inability to buffer timely and effectively, increasing the risk of breakage of the central power cord 103. Too large a pitch may result in too small a winding angle of the core wire, causing the core wire to tilt in the direction of the power cord, which may also lead to an increased risk of breakage.

In the embodiment of the present invention, through numerous experiments by the applicant, the inventive discovery will set the pitch to 0.1-2 times of the core wire diameter, so that the second winding unit 104 has better bending resistance. In a specific application scenario, however, the pitch is set to 1 times the core diameter, which exhibits the best bending resistance.

Since the diameters of the control line and the signal transmission line are usually the same or not much different in practical application. Therefore, the core diameter may be the control wire diameter, the signal transmission line diameter, or the average of the two diameters.

Obviously, the cross section of the wire is usually circular, so the above mentioned pitch is also referred to as diameter, but it is easy to be understood by those skilled in the art that other deformation structures, such as polygonal structure, may be adopted when the cross section of the core wire, or other structures may be adopted according to the needs of the practical application. In the case of a wire cross section with these deformations, the pitch between the adjacent wires (101,102) can be set to 0.1 to 2 times the width of the wires.

Furthermore, the control line and the signal transmission line can be wound with a plurality of layers, and an insulating layer is arranged between adjacent layers.

Specifically, when only one layer is wound, the wire can be ensured to have strong bending resistance as a whole, but the number of signal paths which can be transmitted is limited. If twine the multilayer, then can guarantee to transmit multichannel signal simultaneously, nevertheless inevitably can reduce the holistic anti bending performance of wire rod to the number of piles of winding is more, and anti bending performance descends then more, so in the embodiment of the utility model discloses the wire of twining too many numbers of piles is not recommended, twines 3 layers at most generally, twines 2 layers preferably to guarantee to have sufficient anti bending performance.

When winding a plurality of layers of wires, an insulating layer may be disposed between adjacent layers, so that signal transmission between different layers may not interfere with each other. Specifically, after winding a layer of the multi-bundle conductor, an insulating layer, such as an insulating glue, may be coated on the surface of the layer of the multi-bundle conductor. And then, continuously winding a new plurality of wires on the insulating layer, wherein the winding mode of the second layer is the same as that of the first layer, and the finally obtained winding structure can be completely the same or slightly different according to the requirement, for example, the winding angle can be different, and the winding intercept can be different.

However, in any winding structure, the winding manner is the same, that is, "a plurality of repeated and continuous second winding units 104 are formed, the core wires in the second winding units 104 are wound side by side at the same angle, and the distance between the adjacent second winding units 104 is 2 to 4 times the width of the second winding units 104".

Referring to fig. 3, in embodiment 4 of the present invention, 2 signal transmission lines and 3 control lines are wound on the surface of the power line in two layers, and an isolation insulating layer 105 is disposed between the two layers.

Wherein, 2 signal transmission lines 101 are positioned on the same layer, 3 control lines 103 are positioned on the upper layer of the signal transmission lines, and are wound along the corresponding arrangement and winding modes to obtain the final endoscope cable.

It should be noted that fig. 1 to 3 are only schematic structural diagrams drawn for convenience of description, and in an actual product, each core wire or wire has a very small diameter, so that in the actual product, the widths of the first winding unit and the second winding unit and the distance between the adjacent first winding unit and the second winding unit are very small, so that the wire between the adjacent first winding unit and the adjacent second winding unit does not incline too much toward the core material, and the wire can still be maintained at a preferred winding angle.

The embodiments are described in a progressive manner in the specification, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other. The device disclosed by the embodiment corresponds to the method disclosed by the embodiment, so that the description is simple, and the relevant points can be referred to the method part for description. It should be noted that, for those skilled in the art, without departing from the principle of the present invention, the present invention can be further modified and modified, and such modifications and modifications also fall within the protection scope of the appended claims.

It is further noted that, in the present specification, relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.

Claims (10)

1. The utility model provides an endoscope cable, includes many heart yearns and cover and establishes protective layer outside many heart yearns, its characterized in that, the heart yearn includes: signal transmission lines, control lines and power lines;

the signal transmission line comprises a first conducting wire and a second conducting wire which are insulated from each other; the second conducting wire is wound on the surface of the first conducting wire to form a plurality of continuous first winding units, and the distance between every two adjacent first winding units is 2-4 times of the width of the single first winding unit.

2. The endoscope cable according to claim 1, wherein a winding angle of the first winding unit is an angle of 30 to 60 degrees with respect to the first wire.

3. The endoscope cable of claim 1, wherein an outer surface of the signal transmission line is coated with a protective layer, and an outer surface of the first wire and/or the second wire is coated with an insulating layer.

4. The endoscope cable of claim 3, wherein the signal transmission line and the power supply line are wound side by side on a surface of the control line, forming a plurality of consecutive second winding units.

5. The endoscope cable of claim 3, wherein the signal transmission line and the control line are wound side by side on a surface of the power supply line, forming a plurality of continuous third winding units.

6. The endoscope cable of claim 3, wherein the power supply line and the control line are wound side by side on the surface of the signal transmission line, forming a plurality of consecutive fourth winding units.

7. The endoscope cable of claim 4, wherein the power supply wire comprises a conductive core having a set wire diameter, an insulating layer coated outside the conductive core, and an insulating layer between the insulating layer and the conductive core.

8. The endoscope cable of claim 7, wherein there are 2 signal transmission lines and 3 control lines; the signal transmission lines and the control lines are sequentially staggered and wound on the surface of the power line side by side.

9. The endoscope cable of claim 8, wherein in the second winding unit, a pitch between the control wire and the signal transmission line is 0.1-2 times a diameter of the control wire or the signal transmission line or an average of the diameters of the signal transmission line and the control wire.

10. The endoscope cable of claim 8, wherein 2 signal transmission lines and 3 control lines are wound in 2 to 3 layers on the surface of the power supply line, and an outer surface of each layer is coated with an insulating layer.

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