Pulley assembly, traction mechanism, endoscope and traction rope tensioning method

Abstract

The present invention discloses a thumbwheel assembly, a traction mechanism, an endoscope and a traction rope tensioning method, and relates to the technical field of medical devices. The thumbwheel assembly of the present invention comprises a first wheel disc and a second wheel disc, the first wheel disc is used to fix the first traction rope of the traction mechanism, the second wheel disc is used to fix the second traction rope of the traction mechanism, and the thumbwheel assembly also comprises a fastener, the fastener is used to connect the first wheel disc and the second wheel disc, the fastener has at least a first state and a second state, when the fastener is in the first state, the first wheel disc and the second wheel disc are rotatably connected, when the fastener is in the second state, the first wheel disc and the second wheel disc are fixedly connected. The thumbwheel assembly of the present invention is conducive to improving the consistency of the tensioning degree of the first traction rope and the second traction rope.

Description

Technical Field

[0001] The present invention relates to the technical field of medical devices, and in particular to a thumbwheel assembly, a traction mechanism, an endoscope and a traction rope tensioning method. Background Art

[0002] An endoscope is a commonly used medical device that can directly enter the human body for examination and provide doctors with sufficient diagnostic information. An endoscope usually includes: an insertion part for inserting into the human body, a handle for controlling the bending of the front end of the insertion part, and a display device for displaying the internal environment of the human body's natural cavity; the endoscope can realize the internal observation of the human body, the exploration of lesions, and the treatment of lesions through the cooperation of the above three parts.

[0003] After the insertion part is inserted into the human body, the camera module at the far end of the insertion part provides the doctor with diagnostic information. If necessary, a treatment instrument can be inserted into the endoscope to complete sampling or treatment of the lesion, or a negative pressure source can be attached to collect tissue samples from the lesion. To perform the above operations, the direction of the distal component needs to be adjusted at any time to align the camera module and the instrument tube port with the lesion.

[0004] The distal end of the insertion portion of the endoscope in the related art is an active bending section, and two traction ropes are arranged in the handle. The distal ends of the traction ropes are connected to the active bending section, and the proximal ends are fixed on the dial wheel. In the natural state, the two traction ropes are in a taut state. By turning the dial rod, the two traction ropes can be moved synchronously in different directions, so that the active bending section of the insertion portion is bent. In the related art, the tensioning of the two traction ropes is achieved by connecting the matching male connector and the female connector. However, the inventor found that this tensioning method has the problem of poor consistency of the tensioning force of the two traction ropes, which causes the active bending section of the endoscope to bend to the side with greater tensioning force of the traction rope in the initial state, affecting the production quality of the endoscope.

[0005] Therefore, providing a traction mechanism that can improve the consistency of the tensioning force of two traction ropes is a technical problem that needs to be solved urgently by those skilled in the art. Summary of the invention

[0006] The invention discloses a thumbwheel assembly, a traction mechanism, an endoscope and a traction rope tensioning method, so as to solve the technical problem in the related art that when the traction ropes are tensioned, the tensioning force consistency of two traction ropes is poor.

[0007] In order to solve the above problems, the present invention adopts the following technical solutions:

[0008] A first aspect of the present invention provides a thumbwheel assembly.

[0009] The thumbwheel assembly of the present invention is used on a traction mechanism, and the thumbwheel assembly includes a first wheel disc and a second wheel disc, the first wheel disc is used to fix the first traction rope of the traction mechanism, and the second wheel disc is used to fix the second traction rope of the traction mechanism, and the thumbwheel assembly also includes a fastener, and the fastener is used to connect the first wheel disc and the second wheel disc, and the fastener has at least a first state and a second state, when the fastener is in the first state, the first wheel disc and the second wheel disc are rotatably connected, and when the fastener is in the second state, the first wheel disc and the second wheel disc are fixedly connected.

[0010] According to an optional embodiment, a first fixing portion is provided on the first wheel disc, the first fixing portion is used to fix the first traction rope, and the first fixing portion protrudes from the side wall of the first wheel disc; a second fixing portion is provided on the second wheel disc, the second fixing portion is used to fix the second traction rope, and the second fixing portion protrudes from the side wall of the second wheel disc.

[0011] According to an optional embodiment, the distance between the first fixing portion and the second fixing portion satisfies: L 1 <1 / 3L 2 , where L 1 is the sum of the arc lengths of the first wheel disc and the second wheel disc between the first fixing portion and the second fixing portion, L 2 is the circumference of the disk where the first wheel disk or the second wheel disk is located.

[0012] According to an optional embodiment, one of the first wheel disc and the second wheel disc is further provided with a protrusion, the protrusion protrudes from the side wall of the first wheel disc or the second wheel disc, and the distance between the protrusion and the first fixing portion or the second fixing portion satisfies: L 3 <1 / 3L 2 , where L 2 is the circumference of the disk where the first wheel disk or the second wheel disk is located, L 3 It is the sum of the arc lengths of the first wheel disc and / or the second wheel disc between the protruding portion and the first fixing portion or the second fixing portion.

[0013] According to an optional embodiment, the first wheel disc and the second wheel disc overlap each other; or one of the first wheel disc and the second wheel disc is provided with a receiving groove, and the other of the first wheel disc and the second wheel disc is embedded in the receiving groove, so that the first wheel disc and the second wheel disc form a nested structure.

[0014] According to an optional embodiment, one of the first wheel disc and the second wheel disc having the accommodating groove is also provided with a sliding groove, and the other is provided with a first mounting hole, the sliding groove and the first mounting hole are connected to each other, and the sliding groove and the first mounting hole are used to install the fastener; the sliding groove is an arc-shaped structure, and the projection of the sliding groove in the direction of the second wheel disc is at least partially located on the second wheel disc.

[0015] According to an optional embodiment, a second mounting hole is provided on the first wheel disc, a third mounting hole is provided on the second wheel disc, and the second mounting hole and the third mounting hole are coaxially arranged.

[0016] A second aspect of the present invention provides a traction mechanism.

[0017] The traction mechanism of the present invention is used on an endoscope, and the traction mechanism includes a thumbwheel assembly, and the thumbwheel assembly is the thumbwheel assembly described in any technical solution of the present invention; the traction mechanism also includes a first traction rope and a second traction rope, the distal end of the first traction rope is fixed to the distal end of the active bending section of the insertion part, and the proximal end is fixed to the first wheel disc of the thumbwheel assembly, and the distal end of the second traction rope is fixed to the distal end of the active bending section of the insertion part, and the proximal end is fixed to the second wheel disc of the thumbwheel assembly.

[0018] A third aspect of the present invention provides an endoscope.

[0019] The endoscope of the present invention comprises a handle and an insertion portion, wherein the handle is connected to the insertion portion, and the handle comprises a traction mechanism, which is the traction mechanism described in any one of the technical solutions of the present invention.

[0020] A fourth aspect of the present invention provides a traction rope tensioning method.

[0021] The traction rope tensioning method of the thumbwheel assembly based on any one of the technical solutions in the present invention comprises the following steps: fixing the distal end of the first traction rope of the traction mechanism to the distal end of the active bending section of the insertion part, and fixing the proximal end to the first wheel disc; fixing the distal end of the second traction rope of the traction mechanism to the distal end of the active bending section of the insertion part, and fixing the proximal end to the second wheel disc; controlling the fastener to be in the first state; controlling the first wheel disc and the second wheel disc to rotate, and making the first traction rope and the second traction rope in a tensioned state; controlling the fastener to be in the second state.

[0022] The technical solution adopted by the present invention can achieve the following beneficial effects:

[0023] The dial assembly of the present invention can firstly put the fastener in the first state during the process of tensioning the first traction rope and the second traction rope, and the first wheel disc and the second wheel disc are rotatably connected. The operator can control the first wheel disc and the second wheel disc to rotate towards each other at the same time with one hand, so that the proximal end of the first traction rope and the proximal end of the second traction rope are close to each other, thereby achieving the tensioning of the first traction rope and the second traction rope; after the first traction rope and the second traction rope are tensioned, the fastener is controlled to be in the second state, and the first wheel disc and the second wheel disc are fixedly connected, and the positions of the first traction rope and the second traction rope are fixed, and when force is applied to the dial member, the first wheel disc and the second wheel disc can be rotated at the same time.

[0024] It can be seen that, in the process of tensioning the first traction rope and the second traction rope, the thumbwheel assembly of the present invention only needs one hand to control the first wheel disc and the second wheel disc to rotate towards each other at the same time, which can improve the consistency of the force applied to the first wheel disc and the second wheel disc, thereby improving the consistency of the tensioning degree of the first traction rope and the second traction rope, and solves the problem of poor consistency in the tensioning force of the two traction ropes when the traction ropes are tensioned in the related art.

[0025] On the other hand, when the thumbwheel assembly of the present invention needs to re-tighten the first traction rope and the second traction rope, it is only necessary to switch the fastener from the second state to the first state, adjust the rotation angle of the first wheel disc and the second wheel disc again, and then switch the fastener to the second state again. Compared with the method of re-tightening the first traction rope and the second traction rope in the prior art, it has the advantages of simple process and easy operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0027] Figure 1 is a schematic diagram of an endoscope implemented in the present application;

[0028] Figure 2 is a schematic diagram of the cooperation between the thumbwheel assembly and the toggle member in the embodiment of the present application;

[0029] Figure 3 is a first schematic diagram of a thumbwheel assembly according to an embodiment of the present application;

[0030] Figure 4 is a second schematic diagram of a thumbwheel assembly according to an embodiment of the present application;

[0031] Figure 5 is a third schematic diagram of the thumbwheel assembly of the embodiment of the present application;

[0032] Figure 6 is a schematic diagram of the first roulette wheel of an embodiment of the present application;

[0033] Figure 7 is a schematic diagram of the second wheel of the embodiment of the present application;

[0034] Figure 8 It is a schematic diagram of a fixed shaft according to an embodiment of the present application.

[0035] In the figure: 100, dial assembly; 110, first wheel disc; 111, first fixing portion; 112, accommodating groove; 113, sliding groove; 114, second mounting hole; 120, second wheel disc; 121, second fixing portion; 122, protruding portion; 123, first mounting hole; 124, third mounting hole; 130, fastener; 131, bolt; 132, nut; 200, traction mechanism; 210, first traction rope; 220, second traction rope; 230, fixed shaft; 240, toggle member; 300, handle; 400, insertion portion; 410, active bending section; 420, passive bending section. DETAILED DESCRIPTION

[0036] To make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be described in detail below. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other implementation methods obtained by ordinary technicians in this field without creative work belong to the scope of protection of the present invention.

[0037] The terms "first", "second", etc. in the specification and claims of the present application are used to distinguish similar objects, and are not used to describe a specific order or sequence. It should be understood that the data used in this way can be interchangeable under appropriate circumstances, so that the embodiments of the present application can be implemented in an order other than those illustrated or described here, and the objects distinguished by "first", "second", etc. are generally of one type, and the number of objects is not limited. For example, the first object can be one or more. In addition, "and / or" in the specification and claims represents at least one of the connected objects, and the character " / " generally indicates that the objects associated with each other are in an "or" relationship.

[0038] In each embodiment of the present application, "proximal end" and "distal end" refer to the position of each component relative to the user in the use environment, wherein the end closer to the user is designated as the "proximal end" and the end farther from the user is designated as the "distal end".

[0039] When the traction rope in the related art is tensioned, the distal ends of the first traction rope and the second traction rope are fixedly connected to the distal end of the active bending section, the proximal end of the first traction rope is fixedly connected to the male connector, and the proximal end of the second traction rope is fixedly connected to the female connector. The male connector is fixedly connected to the female connector by threaded connection. After the male connector and the female connector are fixed, the tension of the first traction rope and the second traction rope can be achieved.

[0040] However, the inventors found that: when the male connector and the female connector are matched, the male connector and the female connector need to be rotated. After the male connector and the female connector are rotated to a certain extent, the rotation of the male connector and the female connector will cause the first traction rope and the second traction rope to twist; when the male connector and the female connector are rotated into place, the torsional force of the first traction rope and the second traction rope may cause the male connector and the female connector to reverse, causing the male connector and the female connector to loosen. Usually in the related art, after the male connector and the female connector are rotated into place, a glue dispensing operation is also performed between the male connector and the female connector, and the torsional force of the first traction rope and the second traction rope is overcome by the bonding effect of the glue.

[0041] On the other hand, in the process of rotating the male joint and the female joint, the male joint and the female joint are controlled by different hands of the operator, which may cause the male joint and the female joint to be subjected to inconsistent forces, thereby causing the first traction rope and the second traction rope to be inconsistently tensioned. Usually, the first traction rope and the second traction rope need to be re-tensioned at this time. Since the glue between the male joint and the female joint has been solidified, if you want to re-tension the first traction rope and the second traction rope again, it is not only complicated in process, but also difficult.

[0042] Furthermore, when the operator is in the process of tensioning the first traction rope and the second traction rope, it is usually difficult to determine whether the tension of the first traction rope and the second traction rope is consistent. The specific reason is that when the operator is in the process of tensioning the first traction rope and the second traction rope, the active bending section is fixed on the fixed tool and kept in a straight state. Even if the tension of the first traction rope and the second traction rope is inconsistent, the active bending section is still kept in a straight state under the action of the fixed tool, which makes it difficult for the operator to determine whether the tension of the first traction rope and the second traction rope is consistent.

[0043] To this end, the present application provides a thumbwheel assembly, which has a first wheel disc and a second wheel disc, and the first wheel disc and the second wheel disc are rotatably connected. During the process of tensioning the first traction rope and the second traction rope, the operator can control the first wheel disc and the second wheel disc to rotate towards each other at the same time with one hand, which can improve the consistency of the force applied to the first wheel disc and the second wheel disc, thereby improving the consistency of the tensioning degree of the first traction rope and the second traction rope; after the first traction rope and the second traction rope are tensioned, the first wheel disc and the second wheel disc are fixedly connected, and when force is applied to the thumbwheel member 240, the first wheel disc and the second wheel disc can be rotated at the same time.

[0044] The following is combined with Figures 1 to 8 , the thumbwheel assembly, traction mechanism, endoscope and traction rope tensioning method provided in the present application are described in detail through specific embodiments and their application scenarios.

[0045] The first aspect of this embodiment provides a detailed description of the thumbwheel assembly.

[0046] The thumbwheel assembly of this embodiment is used on the traction mechanism 200 of the endoscope. Figure 1 The endoscope includes a handle 300 and an insertion portion 400. The handle 300 is provided with an operating member for the convenience of the doctor's operation. The insertion portion 400 is used to be inserted into the cavity. Figure 1 The insertion part 400 has an active bending section 410 at its distal end, and a camera module and other structures are provided on the distal end surface of the active bending section 410. Figure 1 The traction mechanism 200 is located on the handle 300 and comprises a first traction rope 210 and a second traction rope 220. By controlling the first traction rope 210 and the second traction rope 220 to move synchronously and in opposite directions, the active bending section 410 can be bent.

[0047] The thumbwheel assembly of this embodiment includes a first wheel disc 110 and a second wheel disc 120. Figure 2~Figure 4 The first wheel disc 110 and the second wheel disc 120 are the installation bases of the first traction rope 210 and the second traction rope 220. Exemplarily, the distal end of the first traction rope 210 is fixed to the distal end of the active bending section 410, and the proximal end of the first traction rope 210 is fixed to the first wheel disc 110, as shown in FIG. Figure 3 As shown. Exemplarily, the distal end of the second traction rope 220 is fixed to the distal end of the active bending section 410, and the proximal end of the second traction rope 220 is fixed to the second wheel 120, as shown. Figure 3 As shown. Exemplarily, the fixing of the distal ends and proximal ends of the first traction rope 210 and the second traction rope 220 can be achieved by welding or bonding.

[0048] In some embodiments, the thumbwheel assembly further includes a fastener 130, and the fastener 130 is used to connect the first wheel disc 110 and the second wheel disc 120. Figure 2~Figure 4 Preferably, the fastener 130 has at least a first state and a second state, when the fastener 130 is in the first state, the first wheel disc 110 and the second wheel disc 120 are rotatably connected; when the fastener 130 is in the second state, the first wheel disc 110 and the second wheel disc 120 are fixedly connected.

[0049] Specifically, when the fastener 130 is in the first state, the first wheel disc 110 and the second wheel disc 120 are rotatably connected, so that the first wheel disc 110 and the second wheel disc 120 can rotate relative to each other under the condition of force. When the fastener 130 is in the second state, the first wheel disc 110 and the second wheel disc 120 are fixedly connected, so that the first wheel disc 110 and the second wheel disc 120 cannot rotate relative to each other under the condition of force; however, the first wheel disc 110 and the second wheel disc 120 can rotate synchronously under the condition of force, that is, when the first wheel disc 110 rotates, it can drive the second wheel disc 120 to rotate, or when the second wheel disc 120 rotates, it can drive the first wheel disc 110 to rotate.

[0050] The thumbwheel assembly of this embodiment has at least two states of the fastener 130 for connecting the first wheel disc 110 and the second wheel disc 120. For example, in the process of realizing the tensioning of the first traction rope 210 and the second traction rope 220, the fastener 130 can be firstly placed in the first state, at which time the first wheel disc 110 and the second wheel disc 120 are rotatably connected, and the operator can control the first wheel disc 110 and the second wheel disc 120 to rotate towards each other at the same time with one hand (rotating towards each other means that one of the first wheel disc 110 and the second wheel disc 120 rotates clockwise and the other rotates clockwise). One rotates counterclockwise), so that the proximal end of the first traction rope 210 and the proximal end of the second traction rope 220 are close to each other, thereby realizing the tensioning of the first traction rope 210 and the second traction rope 220; after the first traction rope 210 and the second traction rope 220 are tensioned, the fastener 130 is controlled to be in the second state, at this time, the first wheel 110 and the second wheel 120 are fixedly connected, the positions of the first traction rope 210 and the second traction rope 220 are fixed, and when force is applied to the toggle member 240, the first wheel 110 and the second wheel 120 can be rotated at the same time.

[0051] For example, when controlling the first wheel disc 110 and the second wheel disc 120 to rotate toward each other, the operator may apply force to the second wheel disc 120 through the thumb, and apply force to the first wheel disc 110 through the index finger or the middle finger.

[0052] It can be seen that the thumbwheel assembly of the present embodiment can control the first wheel disc 110 and the second wheel disc 120 to rotate towards each other simultaneously with only one hand during the process of tensioning the first traction rope 210 and the second traction rope 220, thereby improving the consistency of the forces applied to the first wheel disc 110 and the second wheel disc 120, thereby improving the consistency of the tensioning degree of the first traction rope 210 and the second traction rope 220, thereby solving the problem of poor consistency in the tensioning force of the two traction ropes when tensioning the traction ropes in the related art.

[0053] On the other hand, when the thumbwheel assembly of this embodiment needs to re-tighten the first traction rope 210 and the second traction rope 220, it is only necessary to switch the fastener 130 from the second state to the first state, adjust the rotation angle of the first wheel disc 110 and the second wheel disc 120 again, and then switch the fastener 130 to the second state again. Compared with the method of re-tightening the first traction rope 210 and the second traction rope 220 in the prior art, it has the advantages of simple process and easy operation.

[0054] In some embodiments, the first wheel disc 110 is provided with a first fixing portion 111, the first fixing portion 111 is used to fix the first traction rope 210, and the first fixing portion 111 protrudes from the side wall of the first wheel disc 110, such as Figure 6 The second wheel disc 120 is provided with a second fixing portion 121, which is used to fix the second traction rope 220, and the second fixing portion 121 protrudes from the side wall of the second wheel disc 120, as shown. Figure 7 shown.

[0055] In the solution of this embodiment, the first traction rope 210 is fixed to the first fixing portion 111, and the second traction rope 220 is fixed to the second fixing portion 121. The first fixing portion 111 protrudes from the side wall of the first wheel disc 110, and the second fixing portion 121 protrudes from the side wall of the second wheel disc 120, which has the advantage of convenient installation and fixing of the first traction rope 210 and the second traction rope 220; on the other hand, in the process of controlling the first wheel disc 110 and the second wheel disc 120 to rotate toward each other, the first fixing portion 111 and the second fixing portion 121 can be used as the force fulcrum of the operator. For example, the thumb of one hand of the operator applies force to the second fixing portion 121, and the middle finger or index finger applies force to the first fixing portion 111, and then the first fixing portion 111 and the second fixing portion 121 are pinched together, so that the operator can control the first wheel disc 110 and the second wheel disc 120 to rotate toward each other at the same time with one hand.

[0056] In some embodiments, the distance between the first fixing portion 111 and the second fixing portion 121 satisfies: L 1 <1 / 3L 2 Preferably, the distance between the first fixing portion 111 and the second fixing portion 121 satisfies: L 1 <1 / 4L 2 .L 1 is the sum of the arc lengths of the first wheel disc 110 and the second wheel disc 120 between the first fixing portion 111 and the second fixing portion 121, L 2 is the circumference of the disk where the first wheel 110 or the second wheel 120 is located.

[0057] It can be known that the sum of the arc lengths of the first wheel 110 and the second wheel 120 is sufficient for calculating the arc length of the first wheel 110 or the second wheel 120 for the overlapping portion of the first wheel 110 and the second wheel 120 .

[0058] In the solution of this embodiment, controlling the distance between the first fixing portion 111 and the second fixing portion 121 can facilitate the operator to apply force to the first fixing portion 111 and the second fixing portion 121, so that the first wheel disc 110 or the second wheel disc 120 rotates towards each other.

[0059] In some embodiments, one of the first wheel disc 110 and the second wheel disc 120 is further provided with a protrusion 122, the protrusion 122 protrudes from the side wall of the first wheel disc 110 or the second wheel disc 120, and the distance between the protrusion 122 and the first fixing portion 111 or the second fixing portion 121 satisfies: L 3 <1 / 3L 2 . Figure 7 FIG. 1 is a schematic diagram showing a protrusion 122 provided on the second wheel disc 120. Preferably, the distance between the protrusion 122 and the first fixing portion 111 or the second fixing portion 121 satisfies: L 3 <1 / 4L 2 .L 2 is the circumference of the disk where the first wheel 110 or the second wheel 120 is located, L 3 It is the sum of the arc lengths of the first wheel disc 110 and / or the second wheel disc 120 between the protruding portion 122 and the first fixing portion 111 or the second fixing portion 121 .

[0060] In the solution of this embodiment, when the arc length distance between the first fixing portion 111 and the second fixing portion 121 is large, a protrusion 122 is further provided on the first wheel disc 110 or the second wheel disc 120. The protrusion 122 serves as a force application point for the operator, which makes it convenient for the operator to apply force to the first fixing portion 111 and the second fixing portion 121.

[0061] In some embodiments, the first wheel disc 110 and the second wheel disc 120 overlap each other. Exemplarily, the sizes of the first wheel disc 110 and the second wheel disc 120 may be the same or different. In the solution of this embodiment, the first wheel disc 110 and the second wheel disc 120 are in a structure that overlaps each other, which not only enables the first wheel disc 110 and the second wheel disc 120 to rotate toward each other, but also helps to improve the compactness of the thumbwheel assembly structure.

[0062] In some embodiments, one of the first wheel disc 110 and the second wheel disc 120 is provided with a receiving groove 112, and the other of the first wheel disc 110 and the second wheel disc 120 is embedded in the receiving groove 112, so that the first wheel disc 110 and the second wheel disc 120 form a nested structure, such as Figure 2~Figure 6 As shown. For example, Figure 6As shown, the first wheel disc 110 is provided with a receiving groove 112, and the second wheel disc 120 is embedded in the receiving groove 112, so that the first wheel disc 110 and the second wheel disc 120 form a nested structure. Not limited to this, the receiving groove 112 can also be provided on the second wheel disc 120, and then the first wheel disc 110 is embedded in the receiving groove 112 of the second wheel disc 120.

[0063] Exemplarily, the first wheel disc 110 is provided with a receiving groove 112, and the second wheel disc 120 is embedded in the receiving groove 112. At this time, the size of the receiving groove 112 is greater than or equal to the size of the second wheel disc 120, so as to provide sufficient escape space for the rotation of the first wheel disc 110 and the second wheel disc 120. Exemplarily, the second wheel disc 120 can be a disc of the same size as the first wheel disc 110; or the area of ​​the second wheel disc 120 is smaller than that of the first wheel disc 110.

[0064] Exemplarily, after the second wheel disc 120 is embedded in the accommodating groove 112, the two side walls of the second wheel disc 120 do not contact the first wheel disc 110, that is, there is a certain gap between the two side walls of the second wheel disc 120 and the first wheel disc 110, thereby reducing the friction force when the first wheel disc 110 is embedded in the second wheel disc 120 and rotates towards each other.

[0065] In the solution of this embodiment, the first wheel disc 110 and the second wheel disc 120 form a nested structure through the receiving groove 112, which not only enables the first wheel disc 110 and the second wheel disc 120 to rotate toward each other, but also helps to improve the compactness of the dial assembly structure. On the other hand, the first wheel disc 110 and the second wheel disc 120 form a nested structure. When the first wheel disc 110 and the second wheel disc 120 rotate toward each other, the receiving groove 112 can be used to limit the first wheel disc 110 or the second wheel disc 120 embedded in the receiving groove 112, so as to reduce the hidden danger of the first wheel disc 110 or the second wheel disc 120 deviating in its axial direction, thereby improving the consistency of the circumferential movement of the first wheel disc 110 and the second wheel disc 120, so as to further improve the consistency of the tension of the first traction rope 210 and the second traction rope 220.

[0066] In some embodiments, one of the first wheel disc 110 and the second wheel disc 120 having the receiving groove 112 is further provided with a slide groove 113, and the other is provided with a first mounting hole 123. Figure 2~Figure 7 The slide groove 113 and the first mounting hole 123 are connected to each other, and the slide groove 113 and the first mounting hole 123 are used to install the fastener 130, as shown in FIG. Figure 2~Figure 7 As shown. For example, the first wheel disc 110 is provided with a slide groove 113, and the second wheel disc 120 is provided with a first mounting hole 123. Figure 2~Figure 7As shown. Exemplarily, the fastener 130 includes a bolt 131 and a nut 132. After the bolt 131 is installed in the slide groove 113 and the first installation hole 123, the bolt 131 can pass through the first wheel disc 110 and the second wheel disc 120, and then the nut 132 is installed on the bolt 131 to fix the first wheel disc 110 and the second wheel disc 120.

[0067] Exemplarily, when the fastener 130 is in the first state, the bolt 131 and the nut 132 are in a loosened state, so that the first wheel disc 110 and the second wheel disc 120 are movable; when the fastener 130 is in the second state, the bolt 131 and the nut 132 are in a tightened state, so that the first wheel disc 110 and the second wheel disc 120 are fixedly connected.

[0068] In some embodiments, the slide groove 113 is an arc-shaped structure, and the projection of the slide groove 113 in the direction of the second wheel disc 120 is at least partially located on the second wheel disc 120, such as Figure 2~Figure 6 As shown. The slide groove 113 of this embodiment is an arc structure, so that the arc structure can provide space for the sliding of the fastener 130. Before the first wheel disc 110 and the second wheel disc 120 rotate towards each other, the first wheel disc 110 and the second wheel disc 120 can be initially fixed by the fastener 130 to reduce the hidden danger of the first wheel disc 110 or the second wheel disc 120 being offset, thereby further improving the consistency of the movement of the first wheel disc 110 and the second wheel disc 120, and further improving the consistency of the tension of the first traction rope 210 and the second traction rope 220.

[0069] In some embodiments, the first wheel disc 110 is provided with a second mounting hole 114, and the second wheel disc 120 is provided with a third mounting hole 124. The second mounting hole 114 and the third mounting hole 124 are coaxially arranged. Figure 2~Figure 7 In the solution of this embodiment, the second mounting hole 114 and the third mounting hole 124 are coaxially arranged, which can further improve the consistency of the rotation of the first wheel disc 110 and the second wheel disc 120, so as to further improve the consistency of the tension of the first traction rope 210 and the second traction rope 220.

[0070] In some embodiments, one of the second mounting hole 114 and the third mounting hole 124 is fixedly connected to the fixed shaft 230 of the traction mechanism 200, and the other is rotatably connected to the fixed shaft 230. Exemplarily, the second mounting hole 114 is fixedly connected to the fixed shaft 230 of the traction mechanism 200, and the third mounting hole 124 is rotatably connected to the fixed shaft 230. For example, the second mounting hole 114 and the fixed shaft 230 are provided with racks meshing with each other, so that the first wheel 110 is fixedly connected to the fixed shaft 230, such as Figure 6 and Figure 8As shown. Exemplarily, the second mounting hole 114 is partially or completely meshed with the fixed shaft 230. The surface of the third mounting hole 124 is a smooth structure, and the third mounting hole 124 cooperates with the smooth part of the surface of the fixed shaft 230, so that the second wheel 120 is rotatably connected to the fixed shaft 230.

[0071] In some embodiments, the second mounting hole 114 and the third mounting hole 124 are both fixedly connected to the fixed shaft 230 of the traction mechanism 200. Exemplarily, the second mounting hole 114 and the third mounting hole 124 are both engaged with the fixed shaft 230, so that the first wheel disc 110 and the second wheel disc 120 are fixedly connected to the fixed shaft 230.

[0072] It can be known that after the first traction rope 210 and the second traction rope 220 are tightened, the first wheel disc 110 and the second wheel disc 120 are matched with the fixed shaft 230 to prevent the first wheel disc 110 and the second wheel disc 120 from being blocked by the fixed shaft 230 during rotation.

[0073] The second aspect of this embodiment describes the traction mechanism in detail.

[0074] The traction mechanism of this embodiment is used on an endoscope. Specifically, the traction mechanism is used to adjust the curvature of the active curvature section 410 of the endoscope.

[0075] The traction mechanism of this embodiment includes a thumbwheel assembly 100, and the thumbwheel assembly 100 is a thumbwheel assembly of any technical solution in this embodiment, such as Figure 2 The traction mechanism further includes a first traction rope 210 and a second traction rope 220. The distal end of the first traction rope 210 is fixed to the distal end of the active bending section 410 of the insertion part 400, and the proximal end is fixed to the first wheel disc 110 of the thumbwheel assembly 100. The distal end of the second traction rope 220 is fixed to the distal end of the active bending section 410 of the insertion part 400, and the proximal end is fixed to the second wheel disc 120 of the thumbwheel assembly 100.

[0076] As can be known, the traction mechanism further includes a fixed shaft 230 and a toggle member 240. Figure 2 As shown. The fixed shaft 230 is installed in the second mounting hole 114 and the third mounting hole 124. The toggle member 240 is fixedly connected to the fixed shaft 230. The toggle member 240 is a toggle rod or a knob. The toggle member 240 is located outside the endoscope handle 300, so that the toggle member 240 can be controlled to drive the thumbwheel assembly 100 to rotate, thereby driving the first traction rope 210 and the second traction rope 220 to move, thereby realizing the control of the bending angle of the active bending section 410.

[0077] The traction mechanism of this embodiment has the thumbwheel assembly 100 of any one of the embodiments of this embodiment. During the process of tensioning the first traction rope 210 and the second traction rope 220, the consistency of the tensioning degree of the first traction rope 210 and the second traction rope 220 can be improved; on the other hand, when the first traction rope 210 and the second traction rope 220 need to be re-tensioned, it also has the advantages of simple process and easy operation.

[0078] The third aspect of this embodiment describes the endoscope in detail.

[0079] The endoscope of this embodiment includes a handle 300 and an insertion portion 400, and the handle 300 and the insertion portion 400 are connected. Figure 1 The handle 300 includes a traction mechanism 200, which is a traction mechanism of any technical solution in this embodiment. The insertion portion 400 includes an active bending section 410 and a passive bending section 420 connected to each other, as shown in FIG. Figure 1 The structure of the inserting part 400 may be the same as that of the prior art, and will not be described in detail herein.

[0080] The endoscope of this embodiment can be a bronchoscope, a pyeloscope, an esophagoscope, a gastroscope, a colonoscope, an otoscope, a rhinoscope, a stomatoscope, a laryngoscope, a colposcope, a laparoscope, an arthroscope, etc. This embodiment does not specifically limit the type of the endoscope.

[0081] The endoscope of this embodiment has a traction mechanism of any one of the technical solutions of this embodiment in the handle 300, which can improve the consistency of the tensioning degree of the first traction rope 210 and the second traction rope 220; when the first traction rope 210 and the second traction rope 220 need to be re-tensioned, it also has the advantages of simple process and easy operation.

[0082] The fourth aspect of this embodiment provides a detailed description of the traction rope tensioning method.

[0083] The traction rope tensioning method of this embodiment is implemented based on the thumbwheel assembly of any technical solution of this embodiment. In some embodiments, the traction rope tensioning method of this embodiment includes the following steps:

[0084] Step S100 : fix the distal end of the first traction rope 210 of the traction mechanism 200 to the distal end of the active bending section 410 of the insertion portion 400 , and fix the proximal end to the first wheel 110 .

[0085] Step S200 : fix the distal end of the second traction rope 220 of the traction mechanism 200 to the distal end of the active bending section 410 of the insertion portion 400 , and fix the proximal end to the second wheel 120 .

[0086] Step S300: Control the fastener 130 to be in the first state. Specifically, control the fastener 130 to be in the loosened state, so that the first wheel disc 110 and the second wheel disc 120 can be rotatably connected.

[0087] Step S400: Control the first wheel disc 110 and the second wheel disc 120 to rotate, and put the first traction rope 210 and the second traction rope 220 in a tensioned state. Specifically, before controlling the first wheel disc 110 and the second wheel disc 120 to rotate, pre-tighten the first traction rope 210 and the second traction rope 220, so that the first traction rope 210 and the second traction rope 220 initially maintain approximately the same tension state; then control the first wheel disc 110 and the second wheel disc 120 to rotate towards each other, so that the first traction rope 210 and the second traction rope 220 are in a tensioned state.

[0088] Step S500: Control the fastener 130 to be in the second state. Specifically, control the fastener 130 to be in the fastened state, so as to fix the first wheel disc 110 and the second wheel disc 120 together.

[0089] In some embodiments, when the consistency of the tensioning degree of the first traction rope 210 and the second traction rope 220 does not meet the requirements and the first traction rope 210 and the second traction rope 220 need to be re-tensioned, it is only necessary to switch the fastener 130 to the first state, and then re-control the rotation of the first wheel 110 and the second wheel 120; after the first traction rope 210 and the second traction rope 220 are tensioned, the fastener 130 is switched to the second state again.

[0090] The traction rope tensioning method of this embodiment can improve the consistency of the tensioning degree of the first traction rope 210 and the second traction rope 220; and when the first traction rope 210 and the second traction rope 220 need to be re-tensioned, it also has the advantages of simple process and easy operation.

[0091] It should be noted that, in this article, the terms "include", "comprises" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, an element defined by the sentence "comprises a ..." does not exclude the existence of other identical elements in the process, method, article or device including the element.

[0092] In addition, it should be noted that the scope of the methods and devices in the embodiments of the present application is not limited to performing functions in the order shown or discussed, and may also include performing functions in a substantially simultaneous manner or in a reverse order according to the functions involved. For example, the described methods may be performed in an order different from that described, and various steps may be added, omitted, or combined. In addition, features described with reference to certain examples may be combined in other examples.

[0093] The above description is only a specific implementation mode of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A thumbwheel assembly, used on a traction mechanism (200), characterized in that: The thumbwheel assembly comprises a first wheel disc (110) and a second wheel disc (120), the first wheel disc (110) being used to fix the proximal end of a first traction rope (210) of the traction mechanism (200), the distal end of the first traction rope (210) being fixed to the distal end of an active bending section (410) of an insertion portion (400), the second wheel disc (120) being used to fix the proximal end of a second traction rope (220) of the traction mechanism (200), the distal end of the second traction rope (220) being fixed to the distal end of an active bending section (410) of an insertion portion (400), and, The thumbwheel assembly further comprises a fastener (130), wherein the fastener (130) is used to connect the first wheel disc (110) and the second wheel disc (120), and the fastener (130) has at least a first state and a second state. When the fastener (130) is in the first state, the first wheel disc (110) and the second wheel disc (120) are rotatably connected, and when the fastener (130) is in the second state, the first wheel disc (110) and the second wheel disc (120) are fixedly connected.

2. The thumbwheel assembly according to claim 1, characterized in that: The first wheel disc (110) is provided with a first fixing portion (111), the first fixing portion (111) being used to fix the first traction rope (210), and the first fixing portion (111) protrudes from a side wall of the first wheel disc (110); The second wheel disc (120) is provided with a second fixing portion (121), the second fixing portion (121) being used to fix the second traction rope (220), and the second fixing portion (121) protrudes from the side wall of the second wheel disc (120).

3. The thumbwheel assembly according to claim 2, characterized in that: The distance between the first fixing portion (111) and the second fixing portion (121) satisfies: L1<1 / 3L2, Wherein, L1 is the sum of the arc lengths of the first wheel disc (110) and the second wheel disc (120) between the first fixing portion (111) and the second fixing portion (121), L2 is the circumference of the disk where the first wheel disk (110) or the second wheel disk (120) is located.

4. The thumbwheel assembly according to claim 2, characterized in that: A protruding portion (122) is further provided on one of the first wheel disc (110) and the second wheel disc (120), wherein the protruding portion (122) protrudes from a side wall of the first wheel disc (110) or the second wheel disc (120), and a distance between the protruding portion (122) and the first fixing portion (111) or the second fixing portion (121) satisfies: L3<1 / 3L2, Wherein, L2 is the circumference of the disk where the first wheel disk (110) or the second wheel disk (120) is located, L3 is the sum of the arc lengths of the first wheel disc (110) and / or the second wheel disc (120) between the protruding portion (122) and the first fixing portion (111) or the second fixing portion (121).

5. The thumbwheel assembly according to any one of claims 1 to 4, characterized in that: The first wheel disc (110) and the second wheel disc (120) overlap each other; or, One of the first wheel disc (110) and the second wheel disc (120) is provided with a receiving groove (112), and the other of the first wheel disc (110) and the second wheel disc (120) is embedded in the receiving groove (112), so that the first wheel disc (110) and the second wheel disc (120) form a nested structure.

6. The thumbwheel assembly according to claim 5, characterized in that: One of the first wheel disc (110) and the second wheel disc (120) having the receiving groove (112) is also provided with a slide groove (113), and the other is provided with a first mounting hole (123); the slide groove (113) and the first mounting hole (123) are connected to each other, and the slide groove (113) and the first mounting hole (123) are used to install the fastener (130); The slide groove (113) is an arc-shaped structure, and a projection of the slide groove (113) in the direction of the second wheel disc (120) is at least partially located on the second wheel disc (120).

7. The thumbwheel assembly according to any one of claims 1 to 4, characterized in that: The first wheel disc (110) is provided with a second mounting hole (114), the second wheel disc (120) is provided with a third mounting hole (124), and the second mounting hole (114) and the third mounting hole (124) are coaxially arranged.

8. A traction mechanism, used on an endoscope, characterized in that: The traction mechanism comprises a thumbwheel assembly (100), and the thumbwheel assembly (100) is the thumbwheel assembly according to any one of claims 1 to 7; The traction mechanism further comprises a first traction rope (210) and a second traction rope (220); the distal end of the first traction rope (210) is fixed to the distal end of the active bending section (410) of the insertion portion (400), and the proximal end is fixed to the first wheel disc (110) of the thumbwheel assembly (100). The distal end of the second traction rope (220) is fixed to the distal end of the active bending section (410) of the insertion portion (400), and the proximal end is fixed to the second wheel disc (120) of the thumbwheel assembly (100).

9. An endoscope, characterized in that: The invention comprises a handle (300) and an insertion part (400), wherein the handle (300) and the insertion part (400) are connected, and the handle (300) comprises a traction mechanism (200), and the traction mechanism (200) is the traction mechanism according to claim 8.

10. A traction rope tensioning method based on the thumbwheel assembly according to any one of claims 1 to 7, characterized in that: The steps include: The distal end of the first traction rope (210) of the traction mechanism (200) is fixed to the distal end of the active bending section (410) of the insertion portion (400), and the proximal end is fixed to the first wheel (110); The distal end of the second traction rope (220) of the traction mechanism (200) is fixed to the distal end of the active bending section (410) of the insertion portion (400), and the proximal end is fixed to the second wheel disc (120); Controlling the fastener (130) to be in a first state; Controlling the first wheel disc (110) and the second wheel disc (120) to rotate, and placing the first traction rope (210) and the second traction rope (220) in a tensioned state; The fastener (130) is controlled to be in a second state.

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