Tensioning assembly for adjusting tensioning force of silk thread, operating handle and endoscope

Abstract

The utility model relates to a tensioning assembly for adjusting the tensioning force of a silk thread, an operating handle and an endoscope, and the tensioning assembly comprises a stroke wheel which is wound with the silk thread; the fine adjustment unit is connected with the silk thread, and the fine adjustment unit is separated from the travel wheel in the first state, can freely rotate and tension the silk thread and is used for adjusting the tension force of the silk thread; and the fine adjustment unit is mutually locked with the travel wheel in the second state, and is used for maintaining the tensioning force of the silk thread on the travel wheel after being adjusted by the fine adjustment unit. The fine adjustment unit and the travel wheel can have a first state in a fixedly connected assembly relation and a second state in which the fine adjustment unit and the travel wheel are separated from each other and are not connected with each other, so that the tensioning force of a silk thread can be conveniently adjusted; and the silk thread with the adjusted tensile force can be locked so as to maintain the adjusted tensile force of the silk thread on the travel wheel. The device is simple in structure and convenient to adjust.

Description

Technical Field

[0001] The utility model relates to the technical field of endoscopes, in particular to a tensioning assembly for adjusting the tension of a wire, an operating handle and an endoscope. Background Art

[0002] Endoscopes are commonly used instruments in minimally invasive surgery. Their insertion portion can enter the human body through natural orifices or small surgical incisions for observation of pathological changes in internal organs, such as ulcers or tumors in the stomach or intestines. The bending angle of the insertion portion is determined by the traction stroke of the wire rope, and the accuracy of the traction stroke of the wire rope is determined by the tension of the wire rope. Therefore, when assembling the wire rope, one end is fixed to the end of the insertion portion near the insertion end, while the other end is tensioned by being wound around a travel wheel. Due to the inherent elasticity of the wire rope, after being tightened around the travel wheel, a certain amount of rebound occurs, resulting in slack. Tensioning the wire rope solely by rotating the travel wheel is difficult, and it is difficult to ensure that the wire rope is in a tensioned state so that the initial position of the travel wheel is at zero. This results in asymmetric swing angles of the insertion portion. Moreover, since the preload of the wire rope decreases with the number of reciprocating motions driven by the travel wheel, the bending angle of the insertion portion cannot be optimized, making it difficult to meet the doctor's observation angle requirements. Utility Model Content

[0003] (1) Technical problems to be solved

[0004] The utility model provides a tensioning assembly, an operating handle and an endoscope for adjusting the tension of a wire. By utilizing the free assembly structure between the fine-tuning unit and the travel wheel, the fine-tuning unit and the travel wheel can be in a first state of a mutually locked assembly relationship and a second state of being disengaged and not connected to each other, so that the tension of the wire can be adjusted to meet the needs of use, and the wire after the tension has been adjusted can be locked to maintain the adjusted tension of the wire on the travel wheel. Not only is the structure simple, but the adjustment is also convenient.

[0005] (2) Technical solution

[0006] In the first aspect, an embodiment of the present invention proposes a tensioning assembly for adjusting the tension of a wire, comprising a travel wheel, wound with the wire; and a fine-tuning unit, connected to the wire. In a first state, the fine-tuning unit is disengaged from the travel wheel and can rotate freely and tension the wire to adjust the tension of the wire; in a second state, the fine-tuning unit and the travel wheel are locked with each other to maintain the tension of the wire on the travel wheel after being adjusted by the fine-tuning unit.

[0007] Furthermore, the fine-tuning unit includes a first adjusting wheel and a second adjusting wheel, the first adjusting wheel and the second adjusting wheel are fixedly connected to the wire, and the first adjusting wheel and the second adjusting wheel are disengaged from each other with the travel wheel in the first state, and can freely rotate and tension the wire under the action of external rotational force, and the first adjusting wheel and the second adjusting wheel are locked with the travel wheel in the second state.

[0008] Furthermore, the first adjusting wheel is evenly provided with first tooth blocks along its circumference, the second adjusting wheel is evenly provided with second tooth blocks along its circumference, and the travel wheel is provided with a first tooth groove interlocked with the first tooth block and a second tooth groove interlocked with the second tooth block.

[0009] Furthermore, the wire is provided with a first connecting block fixedly connected to the first adjusting wheel and a second connecting block fixedly connected to the second adjusting wheel.

[0010] Furthermore, the silk thread includes a first silk thread segment, a second silk thread segment and a third silk thread segment respectively connected to the first silk thread segment and the second silk thread segment, the third silk thread segment is wound on the travel wheel, the first silk thread segment is wound on the first adjusting wheel, and the second silk thread segment is wound on the second adjusting wheel.

[0011] Furthermore, the travel wheel is provided with a first groove for winding the third wire segment, the first adjustment wheel is provided with a second groove for winding the first wire segment, and the second adjustment wheel is provided with a third groove for winding the second wire segment.

[0012] Furthermore, the first wire segment and the second wire segment are both provided with protective covers.

[0013] Furthermore, the travel wheel is provided with a lever for driving the travel wheel to rotate, the first adjusting wheel is provided with a first lug, and the second adjusting wheel is provided with a second lug.

[0014] In a second aspect, an embodiment of the present invention further provides an operating handle, comprising a handle housing, in which the tensioning assembly for adjusting the tension of the wire as described in the first aspect is installed.

[0015] In a third aspect, an embodiment of the present invention further proposes an endoscope, comprising the operating handle described in the second aspect, and a data transmission cable and an insertion portion respectively connected to both ends of the handle housing, wherein both ends of the wire are respectively connected to the insertion portion.

[0016] (3) Beneficial effects

[0017] In summary, the utility model, through the free assembly structure between the fine-tuning unit and the travel wheel, can enable the fine-tuning unit and the travel wheel to have a first state in a mutually locked assembly relationship and a second state in which they are disengaged and not connected to each other. The fine-tuning unit and the travel wheel are in the disengaged state in the second state, and the external rotational force is used to rotate the fine-tuning unit, so as to straighten and tighten the tension of the wire and then adjust the tension to meet the needs of use. At the same time, the mutual locking state between the fine-tuning unit and the travel wheel in the first state is used to lock the wire after the tension has been adjusted by the fine-tuning unit to maintain the tension of the wire on the travel wheel. It is not only simple in structure but also easy to adjust.

[0018] The utility model provides two first adjusting wheels and a second adjusting wheel with the same structure and independent of each other, so that external force can be applied to the first adjusting wheel and the second adjusting wheel respectively to adjust the tension of the wire thread, which not only improves the flexibility and convenience of adjusting the tension of the wire thread, but also enhances the adaptability of adjusting the tension of the wire thread. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for use in the embodiments of the present invention. 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 any creative work.

[0020] Figure 1 It is a structural schematic diagram of the tensioning assembly of the utility model.

[0021] Figure 2 This is another structural schematic diagram of the tensioning assembly of the utility model.

[0022] Figure 3 It is a structural schematic diagram of the travel wheel of the utility model.

[0023] Figure 4 It is a schematic diagram of the cross-sectional structure of the travel wheel of the utility model.

[0024] Figure 5 It is a structural schematic diagram of the first adjusting wheel and the second adjusting wheel of the utility model.

[0025] Figure 6 It is a schematic cross-sectional structure diagram of the first adjusting wheel and the second adjusting wheel of the utility model.

[0026] Figure 7 It is a structural schematic diagram of the silk thread of the utility model.

[0027] Figure 8 It is a structural diagram of the operating handle of the utility model.

[0028] Figure 9 It is a structural schematic diagram of the endoscope of the present utility model.

[0029] In the picture:

[0030] 1-travel wheel; 10-shift lever; 11-first tooth groove; 12-second tooth groove; 13-notch; 14-threaded hole; 15-first hole groove; 16-second hole groove; 17-first groove;

[0031] 2-wire; 20-protective cover; 21-first connecting block; 22-second connecting block; 23-first wire segment; 24-second wire segment; 25-third wire segment;

[0032] 3-first adjustment wheel; 30-handle housing; 31-first locking hole; 32-second groove; 33-first tooth block; 34-first support ear;

[0033] 4 - second adjustment wheel; 40 - data transmission cable; 41 - second locking hole; 42 - third groove; 43 - second tooth block; 44 - second lug;

[0034] 5-screw; 50-insertion part; 501-snake bone; 502-endoscope lens. DETAILED DESCRIPTION

[0035] The following is a further detailed description of the embodiments of the present invention in conjunction with the accompanying drawings and examples. The detailed description of the following examples and the accompanying drawings are intended to illustrate the principles of the present invention, but are not intended to limit the scope of the present invention. That is, the present invention is not limited to the described embodiments and covers any modifications, replacements, and improvements to the parts, components, and connection methods without departing from the spirit of the present invention.

[0036] It should be noted that, in the absence of conflict, the embodiments and features of the embodiments in this application can be combined with each other. The present application will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0037] First, as Figure 1 and Figure 2 As shown, the utility model relates to a tensioning assembly for adjusting the tension of a wire, comprising a travel wheel 1 around which the wire 2 is wound, and a fine-tuning unit fixedly connected to the wire 2. In a first state, the fine-tuning unit is disengaged from the travel wheel 1 and can rotate freely and tension the wire 2, so as to adjust the tension of the wire 2; and in a second state, the fine-tuning unit is fixedly connected to the travel wheel 1, so as to maintain the tension of the wire 2 on the travel wheel 1 after being adjusted by the fine-tuning unit.

[0038] The utility model uses a free assembly structure between the fine-tuning unit and the travel wheel to enable the fine-tuning unit and the travel wheel to have a first state in a mutually locked assembly relationship and a second state in which they are disengaged and not connected to each other. The fine-tuning unit and the travel wheel are in the disengaged state in the second state, and the fine-tuning unit is rotated by external force to straighten and tighten the wire, thereby adjusting the tension of the wire to meet the needs of use. At the same time, the fine-tuning unit and the travel wheel are in the mutually locked state in the first state to lock the wire after the tension is adjusted by the fine-tuning unit to maintain the tension of the wire on the travel wheel. Not only is the structure simple, but also the adjustment is convenient.

[0039] As a preferred embodiment, Figure 1 and Figure 2 As shown, the fine-tuning unit includes a first adjusting wheel 3 and a second adjusting wheel 4, both of which are fixedly connected to the wire 2. In a first state, the first adjusting wheel 3 and the second adjusting wheel 4 are disengaged from the travel wheel 1 and can freely rotate and tension the wire 2 under the action of an external rotational force. Specifically, the external rotational force can be manually driven by the first lug 34 on the first adjusting wheel 3 and the second lug 44 on the second adjusting wheel 4 to rotate the wire 2 fixedly connected to the first adjusting wheel 3 and the second adjusting wheel 4 to tension the wire 2. In the second state, the first adjusting wheel 3 and the second adjusting wheel 4 are locked with the travel wheel 1. By providing two first and second adjusting wheels with identical structures and independent of each other, external forces can be applied to the first and second adjusting wheels separately to adjust the wire tension, which not only improves the flexibility and convenience of adjusting the wire tension, but also enhances the adaptability of adjusting the wire tension.

[0040] As another preferred embodiment, Figures 3 to 6 As shown, the first adjusting wheel 3 is evenly provided with first tooth blocks 33 along its circumference, and the second adjusting wheel 4 is evenly provided with second tooth blocks 43 along its circumference, the travel wheel 1 is provided with a first tooth groove 11 that is mutually locked with the first tooth block 33 and a second tooth groove 12 that is mutually locked with the second tooth block 43, the travel wheel 1 is provided with a first hole groove 15 for installing the first adjusting wheel 3 and a second hole groove 16 for installing the second adjusting wheel 4, the travel wheel 1 is provided with two notches 13 for the wire 2 to pass through, and the wire 2 passes through the two notches 13 and is fixedly connected to the first adjusting wheel 3 and the second adjusting wheel 4 respectively.

[0041] As another optional implementation.

[0042] Preferably, if Figure 1 、 Figure 6 and Figure 7As shown, the wire 2 is provided with a first connecting block 21 fixedly connected to the first adjusting wheel 3 and a second connecting block 22 fixedly connected to the second adjusting wheel 4. The first connecting block 21 and the second connecting block 22 are respectively inserted into the first locking hole 31 of the first adjusting wheel 3 and the second locking hole 41 on the second adjusting wheel 4. The first connecting block 21 and the first locking hole 31 and the second connecting block 22 and the second locking hole 41 can be assembled by means of interference fit or welding.

[0043] Preferably, if Figure 1 、 Figure 6 and Figure 7 As shown, the wire 2 includes a first wire segment 23 and a second wire segment 24 and a third wire segment 25 connected to the first wire segment 23 and the second wire segment 24 respectively. The third wire segment 25 is wound around the travel wheel 1, and the first wire segment 23 is wound around the first adjusting wheel 3. Specifically, part of the first wire segment 23 is wound around the first adjusting wheel 3, and the second wire segment 24 is wound around the second adjusting wheel 4. Specifically, part of the second wire segment 24 is wound around the second adjusting wheel 4. The first connecting block 21 can be connected to the first wire segment 23, and can also be connected to the third wire segment 25. The three wire segments 25 are connected or connected together with the first wire segment 23 and the third wire segment 25. Specifically, the first connecting block 21 is connected to the connection between the first wire segment 23 and the third wire segment 25. The second connecting block 22 can be connected to the second wire segment 24, or can be connected to the third wire segment 25, or can be connected together with the second wire segment 24 and the third wire segment 25. Specifically, the second connecting block 22 is connected to the connection between the second wire segment 24 and the third wire segment 25, and the first connecting block 21 and the second connecting block 22 are symmetrically arranged on both sides of the travel wheel 1. By winding part of the first wire segment 23 around the first adjusting wheel 3 and part of the second wire segment 24 around the second adjusting wheel 4, it is convenient for external rotational force to drive the first adjusting wheel 3 and the second adjusting wheel 4 to tension the first wire segment 23 and the second wire segment 24 respectively, thereby ensuring the tension of the entire wire 2.

[0044] Preferably, if Figure 4 、 Figure 6 and Figure 7 As shown, the travel wheel 1 is provided with a first groove 17 for winding the third wire segment 25 , the first adjusting wheel 3 is provided with a second groove 32 for winding the first wire segment 23 , and the second adjusting wheel 4 is provided with a third groove 42 for winding the second wire segment 24 .

[0045] Preferably, if Figure 7 As shown, a protective cover 20 is provided on each of the first wire segment 23 and the second wire segment 24 to isolate the first wire segment 23 and the second wire segment 24 and prevent the two from contacting each other due to the staggered arrangement.

[0046] Preferably, if Figure 2 、 Figure 5 and Figure 6 As shown, the travel wheel 1 is provided with a lever 10 for driving the rotation thereof, the first adjusting wheel 3 is provided with a first lug 34, and the second adjusting wheel 4 is provided with a second lug 44. By respectively providing the first lug 34 and the second lug 44 for external force driving on the first adjusting wheel 3 and the second adjusting wheel 4, the first adjusting wheel 3 and the second adjusting wheel 4 can rotate freely under external force to straighten and tension the wire 2.

[0047] Second, as Figure 2 、 Figure 3 and Figure 8 As shown, the utility model also provides an operating handle, including a handle shell 30, in which the tensioning assembly of the first aspect is installed, and the travel wheel 1 is fixedly mounted on the handle shell 30 by four screws 5. Specifically, the travel wheel 1 is provided with four threaded holes 14 for cooperating with the four screws 5 for threaded connection.

[0048] Thirdly, as Figure 1 and Figure 9 As shown, the utility model also provides an endoscope, including the operating handle of the second aspect, and a data transmission cable 40 and an insertion part 50 respectively connected to the two ends of the handle shell 30, the two ends of the wire 2 are respectively connected to the insertion part 50, and the insertion part 50 swings along its axial direction under the drive of the wire 2 driven by the rotation of the travel wheel 1, and the insertion part 50 includes a snake bone 501 connected to the handle shell 30 and an endoscope lens 502 connected to the end of the snake bone 501 away from the handle shell 30.

[0049] It should be noted that the various embodiments in this specification are described in a progressive manner. References to the same or similar parts between the various embodiments are sufficient. Each embodiment focuses on the differences from the other embodiments. The present invention is not limited to the specific steps and structures described above and shown in the figures. Furthermore, for the sake of brevity, detailed descriptions of known methods and techniques are omitted here.

[0050] The foregoing is merely an embodiment of the present application and is not intended to limit the present application. Various modifications and variations are possible for those skilled in the art without departing from the scope of the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present application shall be included within the scope of the claims of the present application.

Claims

1. A tensioning assembly for adjusting the tension of a wire, characterized in that: include A travel wheel (1) having the silk thread (2) wound therearound; A fine-tuning unit, connected to the silk thread (2), In a first state, the fine-tuning unit and the travel wheel (1) are separated from each other and can rotate freely and tension the wire (2), so as to adjust the tension of the wire (2); In the second state, the fine-tuning unit and the travel wheel (1) are locked with each other, so as to maintain the tension of the wire (2) on the travel wheel (1) adjusted by the fine-tuning unit.

2. The tensioning assembly for adjusting the tension of a wire according to claim 1, characterized in that: The fine-tuning unit comprises a first adjusting wheel (3) and a second adjusting wheel (4); the first adjusting wheel (3) and the second adjusting wheel (4) are both fixedly connected to the wire (2); and the first adjusting wheel (3) and the second adjusting wheel (4) are both disengaged from the travel wheel (1) in the first state, and can both rotate freely and tension the wire (2) under the action of an external rotational force; and the first adjusting wheel (3) and the second adjusting wheel (4) are both locked with the travel wheel (1) in the second state.

3. The tensioning assembly for adjusting the tension of a wire according to claim 2, characterized in that: The first adjusting wheel (3) is evenly provided with first tooth blocks (33) along its circumference, the second adjusting wheel (4) is evenly provided with second tooth blocks (43) along its circumference, and the travel wheel (1) is provided with a first tooth groove (11) interlocked with the first tooth block (33) and a second tooth groove (12) interlocked with the second tooth block (43).

4. The tensioning assembly for adjusting the tension of a wire according to claim 2, characterized in that: The silk thread (2) is provided with a first connecting block (21) fixedly connected to the first adjusting wheel (3) and a second connecting block (22) fixedly connected to the second adjusting wheel (4).

5. The tensioning assembly for adjusting the tension of a wire according to claim 2, characterized in that: The silk thread (2) comprises a first silk thread segment (23), a second silk thread segment (24), and a third silk thread segment (25) respectively connected to the first silk thread segment (23) and the second silk thread segment (24); the third silk thread segment (25) is wound around the travel wheel (1); the first silk thread segment (23) is wound around the first adjusting wheel (3); and the second silk thread segment (24) is wound around the second adjusting wheel (4).

6. The tensioning assembly for adjusting the tension of a wire according to claim 5, characterized in that: The travel wheel (1) is provided with a first groove (17) for winding the third wire segment (25), the first adjusting wheel (3) is provided with a second groove (32) for winding the first wire segment (23), and the second adjusting wheel (4) is provided with a third groove (42) for winding the second wire segment (24).

7. The tensioning assembly for adjusting the tension of a wire according to claim 5, characterized in that: The first wire segment (23) and the second wire segment (24) are both provided with a protective cover (20).

8. The tensioning assembly for adjusting the tension of a wire according to claim 2, characterized in that: The travel wheel (1) is provided with a lever (10) for driving the travel wheel (1) to rotate, the first adjustment wheel (3) is provided with a first lug (34), and the second adjustment wheel (4) is provided with a second lug (44).

9. An operating handle, characterized in that: It comprises a handle shell (30), in which a tensioning assembly for adjusting the tension of a wire as claimed in any one of claims 1 to 8 is installed.

10. An endoscope, characterized in that: It comprises the operating handle as claimed in claim 9, and a data transmission cable (40) and an insertion part (50) respectively connected to both ends of the handle housing (30), and both ends of the wire (2) are respectively connected to the insertion part (50).

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