A rotation braking device for an endoscope

Abstract

The application relates to a rotation braking device for an endoscope, which comprises a shell, a rotation device and a braking device; the rotation device comprises a first knob and a second knob; the braking device comprises a first braking knob and a second braking knob; braking structures are arranged between the first braking knob and the first knob and between the second braking knob and the second knob; the braking structure comprises coaxially arranged driving parts and braking parts; the driving parts are provided with driving portions, one side of the braking parts is provided with matched portions matched with the driving portions, and the other side of the braking parts is provided with braking portions; when the first braking knob or the second braking knob rotates, the braking parts and the driving parts relatively rotate, the driving portions on the driving parts drive the matched portions on the braking parts to axially move and make the braking portions on the braking parts press on the first knob or the second knob, so that the first knob or the second knob is braked.

Description

TECHNICAL FIELD

[0001] The present application relates to an endoscope, in particular to a rotating brake device for an endoscope. BACKGROUND

[0002] As an important auxiliary medical instrument for detecting lesions of internal organs of human body, endoscopes are widely used in various surgical operations. Through an endoscope, the lesion site can be clearly and intuitively understood, and the accuracy of diagnosis of the lesion can be improved. A knob device is arranged inside the operating handle of a traditional endoscope, which is used to control the bending of a snake bone in different directions and limit the bending angle of the snake bone. The knob device includes a traction line, a pull line wheel and an angle control knob, etc. The traction line is generally bonded on the pull line wheel by glue or welded on the pull line wheel, which causes the traction line to be easily detached and has a high rejection rate. Meanwhile, the fixing method is difficult and the assembly efficiency is low.

[0003] Therefore, an endoscope is disclosed in the patent application with the publication number CN114176487A. The knob device includes a first pull line wheel and a second pull line wheel rotatably arranged in the shell, and a first knob and a second knob located outside the shell. The first pull line wheel extends out of the shell through the first mounting hole. The first pull line wheel is provided with a first through hole. The second pull line wheel extends out of the shell through the first through hole. The first knob is sleeved on the first pull line wheel. The second knob is stacked on the first knob and sleeved on the second pull line wheel. The brake device includes a first brake assembly and a second brake assembly. The first brake assembly is arranged between the first pull line wheel and the shell and is used to brake the first knob or the first pull line wheel. The second brake assembly is arranged on the side of the second knob away from the first knob and is used to brake the second knob or the second pull line wheel.

[0004] However, the rotating device and the brake device of the above-mentioned endoscope have a complex structure, many parts and a complicated assembly process, which greatly reduces the assembly efficiency and production efficiency of the endoscope. SUMMARY

[0005] The present application aims to overcome the shortcomings of the prior art and provide a rotating brake device for an endoscope. The structure of the rotating brake device is simpler, and the assembly process is further simplified, which is beneficial to improve the assembly efficiency and production efficiency of the endoscope.

[0006] The technical solution of the present application to solve the above technical problems is:

[0007] A rotating brake device for an endoscope, comprising a shell, a rotating device arranged on the shell for driving two groups of pull line wheels to rotate respectively, and a brake device for braking the rotating device, wherein,

[0008] The rotating device comprises a first knob and a second knob, which are respectively installed on the mounting portions of the two groups of pull line wheels and are used to respectively drive the two groups of pull line wheels to rotate independently.

[0009] The braking device comprises a first braking knob and a second braking knob, wherein the first braking knob is used to brake the first knob, and the second braking knob is used to brake the second knob; wherein a braking structure is arranged between the first braking knob and the first knob and between the second braking knob and the second knob, wherein,

[0010] The braking structure comprises a driving member and a braking member arranged coaxially, wherein the driving member is provided with a driving portion, one side of the braking member is provided with a matching portion matched with the driving portion, and the other side of the braking member is provided with a braking portion; when the first braking knob or the second braking knob rotates, the braking member and the driving member rotate relatively, the driving portion on the driving member drives the matching portion on the braking member to move axially and causes the braking portion on the braking member to press tightly on the first knob or the second knob, thereby achieving the braking of the first knob or the second knob.

[0011] Preferably, the braking portion is a rubber ring, which is installed on the braking member.

[0012] Preferably, the braking structure further comprises a reset structure used to drive the braking member to reset, when the first braking knob or the second braking knob is released from braking, the reset structure is used to drive the braking member to reset, so as to cause the matching portion on the braking member to always keep in contact with the driving portion of the driving member, and the braking portion in the braking member is separated from the first knob or the second knob.

[0013] Preferably, the reset structure comprises a sleeve and an elastic member arranged in the sleeve, wherein the sleeve is arranged coaxially with the driving member and the braking member, the lower end of the sleeve is provided with a hook portion for hooking the first knob or the second knob, and the upper end of the sleeve is in contact with the braking portion of the braking member; one end of the elastic member acts on the first knob or the second knob, and the other end of the elastic member acts on the sleeve, and the elastic force of the elastic member causes the sleeve to drive the braking portion of the braking member to separate from the first knob or the second knob.

[0014] Preferably, the matching part comprises a guide part and a limiting part, wherein the guide part is arranged opposite to the driving part of the driving member, and the height of the guide part gradually increases along the circumferential direction of the braking member; the limiting part is arranged at the highest point of the guide part, and is used to limit the driving part of the driving member from continuously rotating on the guide part of the braking member; or the limiting part is arranged at the highest point and the lowest point of the guide part respectively.

[0015] Preferably, the driving part is two groups, and the two groups of driving parts are symmetrically arranged on the driving member; correspondingly, the matching part is also two groups, and the two groups of matching parts are also symmetrically arranged.

[0016] Preferably, the driving member is an integral structure with the first braking knob and the second braking knob respectively.

[0017] Preferably, the two groups of pull wire wheels are a first pull wire wheel and a second pull wire wheel respectively, wherein the pull wire wheel comprises a pull wire part and a mounting part, wherein the mounting part is sequentially provided with a positioning part and a locking part; the first pull wire wheel is provided with a first through hole, and the second pull wire wheel extends out of the shell after passing through the first through hole, and the positioning part and the locking part of the second pull wire wheel are exposed outside the mounting part of the first pull wire wheel; the braking device further comprises a locking member, the locking member comprises a fixed plate and a fixed shaft connected with the fixed plate, wherein the second pull wire wheel is provided with a second through hole; the fixed plate of the locking member is in contact with the pull wire part of the second pull wire wheel, and is fixed in the interior of the shell by a screw; the fixed shaft of the locking member extends out of the second through hole; the second braking knob is mounted on the fixed shaft; the outer side of the second braking knob is provided with a mounting groove, the inner diameter of the mounting groove is greater than the outer diameter of the fixed shaft, a limiting screw is arranged in the mounting groove, the outer diameter of the screw head of the limiting screw is greater than the outer diameter of the fixed shaft, and is less than or equal to the inner diameter of the mounting groove; the limiting screw is mounted on the fixed shaft, and is used to axially limit the second braking knob.

[0018] Preferably, a first guide mechanism is arranged between the sleeve and the first knob or the second knob, the first guide mechanism comprises a first guide part arranged on the outer wall of the sleeve and a first guide groove arranged on the inner wall of the first knob or the second knob, wherein the first guide part and the first guide groove both extend along the axis direction of the sleeve, and the first guide part and the first guide groove are matched.

[0019] Preferably, the brake is respectively provided with a second guide mechanism between the fixed shaft and the shell, the second guide mechanism comprises a second guide part provided on the inner wall of the brake and a second guide groove provided on the outer wall of the shell and the fixed shaft, wherein the second guide part and the second guide groove extend along the axis direction of the locking piece, and the second guide part and the second guide groove are matched.

[0020] Compared with the prior art, the present application has the following beneficial effects:

[0021] 1、The brake structure is arranged in the rotation brake device for endoscopes, when the first brake knob or the second brake knob rotates, the driving part in the driving piece drives the matching part in the brake piece to move axially, so that the brake part in the brake piece is pressed on the first knob or the second knob, and the first knob or the second knob is braked.

[0022] 2、The brake structure is adopted, so that the structure of the rotation brake device for endoscopes is simpler, compared with the existing rotation brake device for endoscope operating handles, the rotation brake device for endoscopes has fewer parts, correspondingly, the manufacturing and assembly costs are lower, the assembly difficulty is further reduced, and the assembly efficiency is significantly improved.

[0023] 3、The rotation brake device for endoscopes has simple structure and low assembly requirement, which is helpful to reduce the labor intensity of assembly workers, improve the assembly speed of the rotation brake device and reduce the labor cost. BRIEF DESCRIPTION OF DRAWINGS

[0024] Figure 1 It is a schematic view of the three-dimensional structure of the rotation brake device for endoscopes.

[0025] Figure 2 It is a sectional view of the rotation brake device for endoscopes.

[0026] Figure 3 It is Figure 2 the local enlarged view of A in the figure.

[0027] Figure 4 and Figure 5 It is a schematic view of the three-dimensional structure of the two different perspectives of the brake device (the second brake knob is hidden).

[0028] Figure 6 and Figure 7 It is a schematic view of the three-dimensional structure of the two different perspectives of the brake piece and the reset structure.

[0029] Figure 8 and Figure 9 are two different perspective views of the first pull line wheel, the first brake knob, the brake structure and the reset structure.

[0030] In the figure: 1 - housing, 2 - first knob; 3 - second knob; 4 - first brake knob; 5 - second brake knob; 6 - brake piece; 601 - guide part; 602 - limiting part; 603 - second guide part; 7 - rubber ring; 8 - limiting screw; 9 - sleeve; 901 - first guide part; 902 - hook part; 10 - elastic piece; 11 - first pull line wheel; 12 - second pull line wheel; 13 - locking piece; 14 - driving part; 15 - hook; 16 - groove. DETAILED DESCRIPTION

[0031] The application will be further described in conjunction with the embodiments and the accompanying drawings, but the embodiments of the application are not limited thereto.

[0032] Referring to Figures 1-9 , the rotating brake device for endoscope of the application comprises a housing 1, a rotating device arranged on the housing 1 for driving two groups of pull line wheels to rotate respectively, and a brake device for braking the rotating device.

[0033] Referring to Figures 1-9 , the two groups of pull line wheels are a first pull line wheel 11 and a second pull line wheel 12, wherein the pull line wheel comprises a pull line part and a mounting part, wherein a positioning part and a locking part are sequentially arranged on the mounting part; a first through hole is arranged through the first pull line wheel 11, the second pull line wheel 12 extends out of the housing 1 after passing through the first through hole, and the positioning part and the locking part of the second pull line wheel 12 are both exposed outside the mounting part of the first pull line wheel 11.

[0034] In the embodiment, the positioning part is a positioning plane arranged on the mounting part, the first knob 2 and the second knob 3 are provided with a positioning groove matched therewith, and the two are matched to drive the first pull line wheel 11 and the second pull line wheel 12 to rotate; the locking part is a collet structure at the end of the mounting part, which is composed of a groove 16 and a hook 15, when the first knob 2 or the second knob 3 is installed on the mounting part, the locking part elastically shrinks inward, so that after the locking part passes through the first knob 2 or the second knob 3, the hook 15 on the locking part hooks the front side of the first knob 2 or the back side of the second knob 3, realizing that the first knob 2 or the second knob 3 is respectively installed on the mounting part of the pull line wheel.

[0035] Referring to Figures 1-9The rotating device comprises a first knob 2 and a second knob 3, the first knob 2 and the second knob 3 are respectively installed on the mounting parts of the two groups of pull line wheels, and are used for driving the two groups of pull line wheels to rotate respectively; wherein the first knob 2 is used for driving the first pull line wheel 11 to rotate, and the second knob 3 is used for driving the second pull line wheel 12 to rotate.

[0036] Referring to Figures 1-9 The braking device comprises a first braking knob 4 and a second braking knob 5, wherein the first braking knob 4 is used for braking the first knob 2, and the second braking knob 5 is used for braking the second knob 3; wherein the first braking knob 4 and the first knob 2, and the second braking knob 5 and the second knob 3 are provided with a braking structure; by setting the braking structure, the first knob 2 and the second knob 3 are braked.

[0037] Referring to Figures 1-9 The braking structure comprises a driving member and a braking member 6 arranged coaxially, wherein the driving member is provided with a driving part 14; one side of the braking member 6 is provided with a matching part matched with the driving part 14, and the other side of the braking member 6 is provided with a braking part; when the first braking knob 4 or the second braking knob 5 rotates, the braking member 6 rotates relative to the driving member, the driving part 14 on the driving member drives the matching part on the braking member 6 to move axially and makes the braking part on the braking member 6 press tightly on the first knob 2 or the second knob 3, so as to brake the first knob 2 or the second knob 3.

[0038] Referring to Figures 1-9 The braking part is a rubber ring 7, and the rubber ring 7 is installed on the braking member 6. By setting the rubber ring 7, the frictional resistance of the first knob 2 or the second knob 3 can be increased, so that the braking is better realized.

[0039] Referring to Figures 1-9 The braking structure further comprises a reset structure for driving the braking member 6 to reset elastically, when the first braking knob 4 or the second braking knob 5 is released from braking, the reset structure is used for driving the braking member 6 to reset elastically, so as to make the matching part on the braking member 6 and the driving part 14 on the driving member always keep in contact, and the braking part in the braking member 6 is separated from the first knob 2 or the second knob 3. By setting the above structure, the purpose is:

[0040] (1), to ensure that the driving member and the brake 6 are in contact state, so that the first brake knob 4 or the second brake knob 5 drives the driving member to rotate, which can drive the brake 6 to move axially, so that the brake part on the brake 6 is in contact with the first knob 2 or the second knob 3, thereby starting to brake; when the first brake knob 4 or the second brake knob 5 drives the driving member to rotate reversely to release the brake, the reset structure drives the brake 6 to reset elastically, so that the matching part on the brake 6 is always in contact with the driving part 14 of the driving member, and at this time, the brake part on the brake 6 is also gradually separated from the first knob 2 and the second knob 3;

[0041] (2), because when the first knob 2 and the second knob 3 are not braked, the first knob 2 and the second knob 3 are not in contact with the brake part in the brake 6, so there is no friction between them, so the rotation of the first knob 2 and the second knob 3 is more smooth.

[0042] Referring to Figures 1-9 , the reset structure includes a sleeve 9 and an elastic member 10 arranged in the sleeve 9, wherein the sleeve 9 is coaxially arranged with the driving member and the brake 6, the lower end of the sleeve 9 is provided with a hook part 902 for hooking the first knob 2 or the second knob 3, which is used to limit the axial displacement of the sleeve 9 (i.e. the moving stroke of the sleeve 9 under the driving of the reset structure), and the upper end is in contact with the brake part of the brake 6; one end of the elastic member 10 acts on the first knob 2 or the second knob 3, and the other end acts on the sleeve 9, the elastic force of the elastic member 10 drives the sleeve 9 to drive the brake part of the brake 6 to separate from the first knob 2 or the second knob 3. In addition, in this embodiment, the elastic member 10 is a spring.

[0043] Referring to Figures 1-9The matching part includes a guide part 601 and a limiting part 602, wherein the guide part 601 is arranged opposite to the driving part 14 of the driving member, and the guide part 601 extends upward along the circumferential direction of the brake member 6; the limiting part 602 is arranged on both sides of the guide part 601, respectively, for limiting the driving part 14 in the driving member from continuing to rotate on the guide part 601 in the brake member 6. While the driving member rotates, the driving part 14 on the driving member moves along the guide part 601 on the brake member 6, and since the height of the guide part 601 gradually increases along the circumferential direction of the brake member 6, the driving member generates downward pressure on the guide part 601, so that the brake member 6 moves axially against the elastic force of the elastic member 10, thereby making the brake part on the brake member 6 contact and press tightly against the first knob 2 or the second knob 3. When the driving part 14 contacts the limiting part 602, the driving member is blocked by the limiting part 602 and cannot continue to rotate, that is, the first brake knob 4 and the second brake knob 5 cannot continue to rotate, at this time, the brake part is pressed tightly against the first knob 2 and the second knob 3. Similarly, when the brake needs to be released, the first brake knob 4 and the second brake knob 5 drive the driving member to rotate in the opposite direction, in this process, the driving part 14 gradually separates from the guide part 601, but due to the action of the reset structure, the brake member 6 starts to reset (in the direction away from the first knob 2 and the second knob 3), so that the guide part 601 is always in contact with the driving part 14, when the driving part 14 contacts the limiting part 602, the driving member is blocked by the limiting part 602 and cannot continue to rotate, that is, the first brake knob 4 and the second brake knob 5 cannot continue to rotate, at this time, the brake part is separated from the first knob 2 or the second knob 3.

[0044] In the embodiment, the driving part 14 is two groups, and the two groups of driving parts 14 are symmetrically arranged on the driving member, and correspondingly, the matching part is also two groups, and the two groups of matching parts are also symmetrically arranged. Through the above arrangement, the pressure received by the two sides of the brake member 6 is the same, the speed of the brake member 6 at each position during axial movement is ensured to be the same, the brake part of the brake member 6 is uniformly pressed against the first knob 2 or the second knob 3, and the braking effect is better.

[0045] Referring to Figures 1-9The driving member is integrally formed with the first brake knob 4 and the second brake knob 5, that is, the driving member is part of the first brake knob 4 and the second brake knob 5. Through the above arrangement, the number of parts can be reduced, the assembly difficulty can be reduced, and the assembly efficiency can be improved.

[0046] Referring to Figures 1-9 The brake device further comprises a locking member 13, the locking member 13 comprises a fixed plate and a fixed shaft connected with the fixed plate, wherein a second through hole is provided through the second pull wire wheel 12; the fixed plate in the locking member 13 is in contact with the pull wire part of the second pull wire wheel 12, and the other side of the first pull wire wheel 11 and the second pull wire wheel 12 is limited by the shell 1, so that the axial movement of the second pull wire wheel 12 and the first pull wire wheel 11 can be limited; and the fixed shaft is fixed in the shell 1 by a screw, so that the fixed shaft cannot rotate; the fixed shaft in the locking member 13 passes out of the second through hole; the second brake knob 5 is installed on the fixed shaft, and the outer side of the second brake knob 5 is provided with a mounting groove, the inner diameter of the mounting groove is greater than the outer diameter of the fixed shaft, and a limiting screw 8 is arranged in the mounting groove, wherein the outer diameter of the screw head of the limiting screw 8 is greater than the outer diameter of the fixed shaft and less than or equal to the inner diameter of the mounting groove; the limiting screw 8 is installed on the fixed shaft, and is used for axially limiting the second brake knob 5, so that the second brake knob 5 cannot move outward under the action of the reset structure.

[0047] Referring to Figures 1-9 A first guide mechanism is arranged between the sleeve 9 and the first knob 2 or the second knob 3, the first guide mechanism comprises a first guide part 901 arranged on the outer wall of the sleeve 9 and a first guide groove arranged on the inner wall of the first knob 2 or the second knob 3, wherein the first guide part 901 and the first guide groove both extend along the axis direction of the sleeve 9, and the first guide part 901 and the first guide groove are matched. Through the arrangement of the first guide mechanism, the rotation of the sleeve 9 can be prevented, and the axial movement of the sleeve 9 can also be guided.

[0048] Referring to Figures 1-9The second guide mechanism is arranged between the brake 6 and the fixed shaft and the shell 1, and comprises a second guide part arranged on the inner wall of the brake 6 and a second guide groove arranged on the outer wall of the fixed shaft and the shell 1, wherein the second guide part and the second guide groove extend along the axis direction of the locking piece 13, and the second guide part and the second guide groove are matched. By arranging the second guide mechanism, the rotation of the driving piece is prevented, and the axial movement of the driving piece is guided.

[0049] Finally, the brake structure between the first brake knob 4 and the first knob 2 in the embodiment and the brake structure between the second brake knob 5 and the second knob 3 are similar in structure and principle, but the installation directions are opposite.

[0050] The above is the preferred embodiment of the application, but the embodiment of the application is not limited by the above, and any change, modification, replacement, combination, simplification made without departing from the spirit and principle of the application shall be an equivalent replacement mode and shall be included in the protection scope of the application.

Claims

1. A rotation braking device for an endoscope, comprising a housing, a rotation device arranged on the housing for driving two groups of pull wire wheels to rotate respectively, and a braking device for braking the rotation device, wherein, the rotation device comprises a first knob and a second knob, which are respectively arranged on the mounting portions of the two groups of pull wire wheels for driving the two groups of pull wire wheels to rotate respectively; the braking device comprises a first braking knob and a second braking knob, wherein the first braking knob is used for braking the first knob, and the second braking knob is used for braking the second knob; wherein a braking structure is arranged between the first braking knob and the first knob and between the second braking knob and the second knob, characterized in that, the braking structure comprises a driving member and a braking member arranged coaxially, wherein the driving member is provided with a driving portion, one side of the braking member is provided with a matching portion matched with the driving portion, and the other side of the braking member is provided with a braking portion; when the first braking knob or the second braking knob rotates, the braking member and the driving member rotate relatively, the driving portion on the driving member drives the matching portion on the braking member to move axially and causes the braking portion on the braking member to press tightly on the first knob or the second knob, thereby achieving the braking of the first knob or the second knob; the braking structure further comprises a reset structure for driving the braking member to reset elastically, when the first braking knob or the second braking knob is released from braking, the reset structure is used for driving the braking member to reset, so as to cause the matching portion on the braking member to always keep in contact with the driving portion of the driving member, and the braking portion in the braking member is separated from the first knob or the second knob; the reset structure comprises a sleeve and an elastic member arranged in the sleeve, wherein the sleeve is arranged coaxially with the driving member and the braking member, the lower end of the sleeve is provided with a hook portion for hooking the first knob or the second knob, and the upper end is in contact with the braking portion of the braking member; one end of the elastic member acts on the first knob or the second knob, and the other end acts on the sleeve, and the elastic force of the elastic member causes the sleeve to drive the braking portion of the braking member to separate from the first knob or the second knob; the braking portion is a rubber ring, which is mounted on the braking member.

2. The rotation brake device for an endoscope according to claim 1, characterized by the matching portion comprises a guide portion and a limiting portion, wherein the guide portion is arranged opposite to the driving portion of the driving member, and the height of the guide portion gradually increases along the circumferential direction of the braking member; the limiting portion is arranged at the highest point of the guide portion for limiting the driving portion in the driving member to continue to rotate on the guide portion in the braking member; or the limiting portions are respectively arranged at the highest point and the lowest point of the guide portion.

3. The rotation brake device for an endoscope according to claim 2, characterized by the driving portions are two groups, which are symmetrically arranged on the driving member, and correspondingly, the matching portions are also two groups, which are also symmetrically arranged.

4. The rotation brake device for an endoscope according to claim 1, characterized by the driving member is an integral structure with the first braking knob and the second braking knob.

5. The rotation brake device for an endoscope according to claim 1, characterized by The two groups of pull wheels are a first pull wheel and a second pull wheel, wherein the pull wheel comprises a pull line part and a mounting part, wherein the mounting part is sequentially provided with a positioning part and a locking part; the first pull wheel is provided with a first through hole, the second pull wheel passes through the first through hole and extends out of the shell, and the positioning part and the locking part of the second pull wheel are exposed outside the mounting part of the first pull wheel; the brake device further comprises a locking piece, the locking piece comprises a fixed plate and a fixed shaft connected with the fixed plate, wherein the second pull wheel is provided with a second through hole; the fixed plate of the locking piece is in contact with the pull line part of the second pull wheel and is fixed in the interior of the shell by a screw, and the fixed shaft of the locking piece passes through the second through hole; the second brake knob is installed on the fixed shaft; the outer side of the second brake knob is provided with a mounting groove, the inner diameter of the mounting groove is greater than the outer diameter of the fixed shaft, a limiting screw is arranged in the mounting groove, the outer diameter of the screw head of the limiting screw is greater than the outer diameter of the fixed shaft and less than or equal to the inner diameter of the mounting groove; the limiting screw is installed on the fixed shaft and is used for axially limiting the second brake knob.

6. The rotation brake device for an endoscope according to claim 1, characterized by The sleeve and the first knob or the second knob are provided with a first guide mechanism, the first guide mechanism comprises a first guide part arranged on the outer wall of the sleeve and a first guide groove arranged on the inner wall of the first knob or the second knob, wherein the first guide part and the first guide groove extend along the axis direction of the sleeve, and the first guide part and the first guide groove are matched.

7. The rotation brake device for an endoscope according to claim 5, characterized by The brake and the fixed shaft and the shell are respectively provided with a second guide mechanism, the second guide mechanism comprises a second guide part arranged on the inner wall of the brake and a second guide groove arranged on the outer wall of the fixed shaft and the shell, wherein the second guide part and the second guide groove extend along the axis direction of the locking piece, and the second guide part and the second guide groove are matched.

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