Operation unit for medical endoscope and endoscope

Abstract

The application discloses an operating part for a medical endoscope, comprising a driving wheel and at least one pair of traction wires, the driving wheel being used for being connected with the traction wires to drive the traction wires to move and further drive a bending part to bend, an axial end of the driving wheel being provided with a first flange protruding in a radial direction, a proximal end side of the first flange being provided with an axial hole opened in an axial direction, the axial hole being used for the pair of traction wires to pass through, and the pair of traction wires being fixedly connected with each other to form a connecting buckle at the terminal ends of the proximal end side after passing through the axial hole, and the axial hole preventing the connecting buckle from passing through. The technical scheme of the application is less likely to cause reverse bending in use compared with the prior art, even if reverse bending occurs, it is not easy to cause bending, or it is difficult to cause repeated bending at the same position. The application further provides a medical endoscope.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of medical devices, in particular to an operating part for a medical endoscope and the endoscope. BACKGROUND

[0002] A medical endoscope generally comprises an elongated insertion part, an operating part (also known as a handle) arranged at the proximal end side of the insertion part. The insertion part is sequentially provided with a front end part, a bending part and a flexible tube part from the distal end. The proximal end of the pulling wire is connected to the distal end of the bending part, and the operator controls the pulling wire by controlling the operating part, so as to realize the control of the bending of the bending part.

[0003] The housing of the operating part is provided with a traction mechanism for fixing the proximal end of the traction wire. The traction mechanism is connected with the knob outside the housing of the operating part, and moves with the movement of the knob to drive the traction wire to control the bending of the bending part. That is, during the use of the medical endoscope, the traction mechanism is controlled by the knob, the traction wire is controlled by the traction mechanism, and the bending of the bending part is controlled by the traction wire.

[0004] During the use of the medical endoscope, the bending part often needs to be repeatedly controlled, which requires that the fixing mode of the traction mechanism and the traction wire be reliable and durable. SUMMARY

[0005] In the prior art, the traction mechanism comprises a driving wheel, and the proximal end of the traction wire is directly fixed to the periphery of the driving wheel, or the two traction wires are wound around the driving wheel (i.e. overlapping each other in the axial direction of the driving wheel) and then the ends of the traction wires are fixed to the periphery of the driving wheel. The former is prone to reverse bending, and the latter is prone to interference between the traction wires and winding. In order to prevent interference, the latter may need to further set different grooves on the driving wheel to accommodate the traction wires. For the structure of the former, the two traction wires are symmetrically arranged in the housing of the operating part. When the driving wheel is controlled to rotate, one traction wire is pulled, and the other traction wire is relaxed. The bending of the pulled traction wire to one side along the rotation of the driving wheel is defined as positive bending, and the bending of the relaxed traction wire to the other side along the rotation of the driving wheel is defined as reverse bending. Obviously, the part close to the proximal end of the relaxed traction wire will be bent in the opposite direction due to the fixation of the proximal end of the traction wire to the driving wheel. When the rotation angle of the driving wheel is large, the traction wire in the reverse bending state may be bent in the opposite direction. If the same part of the traction wire repeatedly bends in the positive direction and the reverse direction, it is easy to break.

[0006] The present application aims to solve the problem of easy breakage due to repeated positive bending and reverse bending at the same site. The embodiments of the present application provide an operating part for a medical endoscope and an endoscope, which are less likely to cause reverse bending, even if reverse bending occurs, are less likely to cause bending, or are less likely to cause repeated bending at the same site compared with the prior art.

[0007] As understood by those skilled in the art, reverse bending means bending in the opposite direction, and bending is bending with a large bending angle or even plastic deformation.

[0008] To solve the above technical problems, the embodiments of the present application disclose an operating part for a medical endoscope, comprising a driving wheel and at least one pair of traction wires, the driving wheel being used to connect with the traction wires to drive the traction wires to move and in turn drive the bending part to bend, one axial end of the driving wheel being provided with a first flange protruding in the radial direction, the proximal side of the first flange being provided with an axial hole opened in the axial direction, for the pair of traction wires to pass through, the ends of the pair of traction wires on the proximal side after passing through the axial hole being fixedly connected to each other to form a connecting buckle, and the axial hole preventing the connecting buckle from passing through.

[0009] With the above technical solution, when the traction wire on one side of the driving wheel is pulled, the traction wire on the other side will arch due to the shortened path but the unchanged length of the traction wire, but the difference from the prior art is that the force causing the arching will cause the part of the pair of traction wires between the axial hole and the connecting buckle to arch. In other words, the traction wire between the axial hole and the fixed part arches, absorbing part of the travel of the arching traction wire. In the prior art, the force causing the arching is concentrated at the position where the traction wire is fixedly connected with the driving wheel, so the present technical solution is less likely to cause reverse bending, even if reverse bending occurs, is less likely to cause bending, or is less likely to cause repeated bending at the same site compared with the prior art.

[0010] In addition, in the prior art, when assembling a pair of cooperating traction wires, since the pair of traction wires are respectively fixed with the driving wheel, the traction wires need to be adjusted (adjusting the positional relationship between the traction wires and other components such as the bending part which have a connection relationship with the traction wires) and then respectively fixed with the driving wheel. The present technical solution provides that the pair of traction wires are first fixed with each other, i.e., the positional relationship between them is first ensured, which is conducive to ensuring the cooperation between the traction wires constituting the pair and is conducive to rapid assembly.

[0011] The axial hole in the present application means that the hole extends in the axial direction of the driving wheel. The pair of traction wires means that the traction wires are used in pairs in cooperation, and the cooperation means that the two traction wires in the pair control the bending part to bend in opposite directions. For example, when one of the traction wires is pulled by the operating part, the bending part bends to the left; when the other traction wire is pulled, the bending part bends to the right.

[0012] Optionally, the two traction wires are fixedly connected to each other by being pressed together from outside by the pressing member after the ends of the traction wires pass through the axial holes on the side of the proximal end of the driving wheel.

[0013] Optionally, the pressing member is an aluminum buckle, and the axial end of the driving wheel, which is provided with the first flange, is provided with a recess for the aluminum buckle.

[0014] Optionally, two axial holes are provided on the driving wheel and are arranged at intervals along the circumference of the driving wheel, one of the two traction wires passes through the axial hole on the side of the driving wheel which is closer to the other side of the driving wheel after passing around the lateral side of the driving wheel, and the other traction wire passes through the axial hole on the side of the driving wheel which is closer to the lateral side.

[0015] In this way, the two traction wires which are fixedly connected to each other cross each other in the radial direction of the driving wheel at the proximal end of the driving wheel. With the above technical solution, the traction wires can move in the axial direction within a certain range of the axial hole, and although there is a certain idle stroke during traction, such an arrangement has a good effect on preventing the same part from being repeatedly bent in opposite directions or being bent in a folded manner.

[0016] Optionally, the driving wheel is provided with a second flange extending in the axial direction of the driving wheel, the second flange is arranged at the proximal end of the driving wheel, the second flange is provided with a circumferential hole, and the traction wire passes through the circumferential hole before passing into the axial hole.

[0017] Optionally, the operation part further comprises a bridge-shaped member fixed to one axial end, and the part of the traction wire between the axial hole and the pressing member is arranged between one axial end and the bridge-shaped member.

[0018] The arrangement of the bridge-shaped member further finely controls the movement of the traction wire in the axial hole and the circumferential hole.

[0019] Optionally, the space between one axial end and the bridge-shaped member allows the traction wire to move but prevents the pressing member from passing through.

[0020] Optionally, the leg of the bridge-shaped member faces one axial end, and the leg is provided with a clamping groove which is clamped with a clamping plate arranged on one axial end.

[0021] The clamping of the clamping groove and the clamping plate makes the fixing function of the bridge-shaped member more stable.

[0022] Optionally, the operation part further comprises a knob for driving the driving wheel to rotate, the knob drives the driving wheel to rotate through a knob shaft, the end surface of the top end of the knob shaft forms a plane with the end surface of one axial end, and the center of the bridge-shaped member is fixed to the top end of the knob shaft.

[0023] The embodiments of the present application also disclose a medical endoscope comprising the operation part. BRIEF DESCRIPTION OF DRAWINGS

[0024] Figure 1 The composition of the medical endoscope is shown.

[0025] Figure 2 Fig. 1 shows a fixing mode of a traction wire and a driving wheel in the prior art.

[0026] Figure 3 Fig. 2 shows a structure diagram of an operating part according to an embodiment of the present application.

[0027] Figure 4 Fig. 3 shows a structure diagram of the operating part of Fig. 2 from another angle. Figure 3

[0028] Figure 5 Fig. 4 shows a structure diagram of a bridge-type member.

[0029] Figure 6 Fig. 5 shows a structure diagram of the operating part after the bridge-type member is removed according to an embodiment of the present application.

[0030] Figure 7 Fig. 6 shows a structure diagram of the operating part of Fig. 5 from another angle. Figure 6 DETAILED DESCRIPTION

[0031] The present application will now be described in detail below with specific embodiments. Other advantages and effects of the present application can be easily understood by those skilled in the art from the content disclosed in the specification. Although the description of the present application will be introduced in combination with the preferred embodiments, this does not mean that the features of the present application are limited to the embodiments. On the contrary, the purpose of introducing the present application in combination with the embodiments is to cover other options or modifications that can be extended based on the claims of the present application. In order to provide a deep understanding of the present application, many specific details will be included in the following description. The present application can also be implemented without using these details. In addition, in order to avoid confusion or obscure the focus of the present application, some specific details will be omitted in the description. It should be noted that the embodiments in the present application and the features in the embodiments can be combined with each other without conflict.

[0032] It should be noted that in the specification, similar reference numbers and letters represent similar items in the following drawings, so once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0033] In the description of the present embodiment, it should be noted that the terms "upper", "lower", "inner", "bottom", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship when the product of the present application is usually placed, which is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the indicated device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application.

[0034] ​​The terms "first", "second", and the like are used only to distinguish descriptions, and cannot be understood as indicating or implying relative importance.

[0035] In the description of the present embodiment, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set", "connected", "connected" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium, or it can be the communication inside two elements. For those skilled in the art, the specific meaning of the above terms in the present embodiment can be understood according to the specific circumstances.

[0036] In order to make the purpose, technical scheme and advantages of the present application more clear, the embodiments of the present application will be further described in detail below with reference to the drawings.

[0037] As shown in Figure 1 , the medical endoscope generally comprises an elongated insertion part 2, an operation part 1 (also known as a handle) provided at the proximal end side of the insertion part 2. The insertion part 2 is sequentially and continuously provided with a front end part 3, a bending part 4 and a flexible tube part 5 from the distal end. Among them, the traction wire 61 (62) is connected between the operation part 1 and the distal end of the bending part 4, and the operator controls the traction wire 61 (62) by controlling the operation part 1 to realize the control of the bending of the bending part 4.

[0038] As shown in Figure 3 , the housing of the operation part 1 is provided with a traction mechanism for fixing the proximal end part of the traction wire. The traction mechanism is connected with the knob located outside the housing of the operation part 1, and moves with the movement of the knob to drive the traction wire 61 (62) to pull to control the bending of the bending part 4. That is, during the use of the medical endoscope, the traction mechanism is controlled by the knob, the traction wire 61 (62) is controlled by the traction mechanism, and the bending of the bending part 4 is controlled by the traction wire 61 (62).

[0039] As shown in Figure 2As shown, in the prior art, the traction mechanism includes a driving wheel 11, and the proximal end of the traction wire 61 (62) is usually directly fixed to the periphery of the driving wheel 11; or the two traction wires are wound around the driving wheel (i.e. overlapping each other in the axial direction of the driving wheel) and then the end of the traction wire is fixed to the periphery of the driving wheel. The former is prone to reverse bending, and the latter is prone to interference between the traction wires and interference during winding. To prevent interference, the latter may need to further set different grooves on the driving wheel to accommodate the traction wire. For the structure of the former, the two traction wires are symmetrically arranged in the housing of the operating part, and when the driving wheel 11 is controlled to rotate, one traction wire 61 is pulled, and the other traction wire 62 is relaxed. The bending of the pulled traction wire 61 to one side along the rotation of the driving wheel is defined as positive bending, and the bending of the relaxed traction wire 62 to the other side along the rotation of the driving wheel is defined as reverse bending. The part close to the proximal end of the relaxed traction wire 62 will be bent in reverse due to the fixation of the proximal end of the traction wire 62 to the driving wheel 11 and the rotation of the driving wheel 11. When the driving wheel 11 rotates at a large angle, the reverse-bent traction wire 62 will be bent in the opposite direction. If the same part of the traction wire 62 repeatedly bends in the positive direction and bends in the reverse direction, it is prone to breakage.

[0040] As shown, Figure 3 An embodiment of the present application provides an operating part 1 for a medical endoscope, which comprises a driving wheel 11 and at least one pair of traction wires 61 (62), the driving wheel 11 is used to connect with the traction wires 61 (62) to drive the traction wires 61 (62) to move and further drive the bending part 4 to bend, and an axial end 111 of the driving wheel 11 is provided with a first flange 112 protruding in the radial direction (as shown in Figure 4 As shown, the proximal side A' of the first flange 112 is provided with an axial hole 113 opened in the axial direction, which is used for the pair of traction wires 61 (62) to pass through, and the ends of the pair of traction wires 61 (62) on the proximal side after passing through the axial hole 113 are fixedly connected to each other to form a connecting buckle 63, and the axial hole 113 prevents the connecting buckle 63 from passing through.

[0041] It is worth noting that although there are two 113 in the figure, in the above embodiment, the axial hole 113 can be one.

[0042] As shown, Figure 3 The ends of the pair of traction wires 61 (62) on the proximal side after passing through the axial hole 113 are fixedly connected to each other by externally applying force to press the press-fit member 63. The press-fit member 62 is an aluminum buckle, and the axial end 111 of the driving wheel 11 provided with the first flange 112 is provided with a recess (not shown in the figure) for the aluminum buckle to be clamped into.

[0043] As shown, Figure 4As shown, two axial holes 113 are provided, namely axial hole 1131 and axial hole 1132, which are arranged at intervals along the circumference of the driving wheel 11, the traction wire 61 passes through the axial hole 1132 closer to the other side B of the driving wheel 11 after passing around the side B' of the driving wheel 11 from the distal end to the proximal end, and the other traction wire 62 passes through the axial hole 1131 closer to the side B'. Figure 4 As shown, the pair of mutually cooperating traction wires 61 (62) intersect on the outer circumferential surface of the driving wheel 11 at the proximal end A' of the driving wheel 11. The traction wires 61 (62) can move in the axial direction of the hole within a certain range of the axial hole 1132 (1131), although there is a certain free travel when being pulled, but such arrangement has better effect on preventing the same part from being repeatedly bent in opposite directions or appearing to be bent.

[0044] As shown, Figure 4 As shown, the driving wheel 11 is provided with a second flange 115 extending in the axial direction of the driving wheel 11, the second flange 115 is arranged at the proximal end A' of the driving wheel, the second flange 115 is provided with a circumferential hole 1151, and the traction wire 61 (62) passes through the circumferential hole 1151 before passing into the axial hole 1132 (1131).

[0045] Optionally, the operation part 1 provided by the embodiment of the present application further comprises a bridge-shaped member 116 fixed to an axial end 111, and the part of the traction wire 61 (62) between the axial hole 1132 (1131) and the compression member 63 is arranged between the axial end 111 and the bridge-shaped member 116.

[0046] Optionally, the space between the axial end 111 and the bridge-shaped member 116 allows the traction wire 61 (62) to move, but prevents the compression member 63 from passing through. Figure 5 The structure of the bridge-shaped member is shown. As shown, Figure 5 As shown, the leg 1161 of the bridge-shaped member 116 faces the axial end 111, the leg 1161 is provided with a clamping groove 1162, and the clamping groove 1162 is clamped with a clamping plate 117 arranged on the axial end 111. The operation part 1 provided by the embodiment of the present application further comprises a knob 12 for driving the driving wheel 11 to rotate, the knob 12 drives the driving wheel 11 to rotate through a knob shaft 13, the end surface of the top end of the knob shaft 13 and the end surface of the axial end 111 form a plane, and the center of the bridge-shaped member 116 is fixed to the top end of the knob shaft 13.

[0047] Figure 6 、 Figure 7 The structure of the operation part 1 with the bridge-shaped member 116 hidden is shown respectively.

[0048] The embodiment of the present application further provides a medical endoscope comprising the operation part 1.

[0049] While the application has been illustrated and described in connection with certain preferred embodiments thereof, it will be readily apparent to those of ordinary skill in the art that various changes in form and detail can be made therein without departing from the spirit and scope of the application. It is intended to encompass all such changes and alterations in the details thereof.

Claims

1. An operation section for a medical endoscope, comprising a driving wheel for connecting with a pull wire to move the pull wire and in turn to bend a bending section, and at least one pair of pull wires, characterized in that, An axial end of the driving wheel is provided with a first flange protruding radially, a proximal side of the first flange is provided with an axial hole opened axially, for the pair of traction wires to pass through, the ends of the pair of traction wires on the proximal side after passing through the axial hole are fixedly connected to each other to form a connecting buckle, and the axial hole prevents the connecting buckle from passing through.

2. The operating portion according to claim 1, wherein The ends of the pair of traction wires on the proximal side after passing through the axial hole are fixedly connected to each other by external force pressing with a pressing member.

3. The operating portion according to claim 2, wherein The pressing member is an aluminum buckle, and the axial end of the driving wheel provided with the first flange is provided with a recess for the aluminum buckle to be clamped into.

4. The operating portion according to claim 2, wherein The axial hole is provided with two holes, which are arranged at intervals along the circumference of the driving wheel, one of the pair of traction wires passes through the axial hole closer to the other side of the driving wheel after passing around the lateral side of the driving wheel from the distal end to the proximal end, and the other traction wire passes through the axial hole closer to the lateral side.

5. The operating portion according to claim 4, wherein The driving wheel is provided with a second flange extending axially along the driving wheel, the second flange is arranged at the proximal end of the driving wheel, the second flange is provided with a circumferential hole, and the traction wire passes through the circumferential hole before passing through the axial hole.

6. The operating portion according to claim 5, wherein A bridge member is further fixed to the axial end, and the part of the traction wire between the axial hole and the pressing member is arranged between the axial end and the bridge member.

7. The operating portion according to claim 6, wherein The space between the axial end and the bridge member allows the traction wire to move, and prevents the pressing member from passing through.

8. The operating portion according to claim 7, wherein The leg of the bridge member is directed towards the axial end, and the leg is provided with a clamping groove which is clamped with a clamping plate arranged on the axial end.

9. The operating portion according to claim 8, wherein A knob is further arranged to drive the driving wheel to rotate, the knob drives the driving wheel to rotate through a knob shaft, the end surface of the top end of the knob shaft forms a plane with the end surface of the axial end, and the center of the bridge member is fixed to the top end of the knob shaft.

10. A medical endoscope comprising the operating part according to any one of claims 1-9.

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