Electronic endoscope zoom mechanism

Abstract

The present application discloses a kind of electronic endoscope zoom mechanism, to provide a kind of electronic endoscope zoom mechanism, which can effectively solve the problem that the pushing force is not transmitted to zoom lens when pushing steel wire, resulting in the problem that zoom lens is not effectively pushed or not pushed to position, so as to ensure the realization of electronic endoscope zoom function.It includes: base;Moving piece;Zoom drive mechanism, which is arranged on the base to drive the moving piece to move;Steel wire, steel wire connects moving piece and zoom lens of electronic endoscope;And steel wire anti-buckling structure.Steel wire anti-buckling structure includes: anti-buckling channel;Capillary tube, capillary tube is extended to anti-buckling channel by moving piece;Flexible pipe, one end of flexible pipe is close to or inserted into anti-buckling channel, the other end of flexible pipe is directly or indirectly connected with zoom lens, steel wire passes through capillary tube, anti-buckling channel and flexible pipe in sequence, and capillary tube is fixed on steel wire.

Description

Technical Field

[0001] This invention relates to an electronic endoscope, and more specifically to an electronic endoscope zoom mechanism. Background Technology

[0002] An electronic endoscope is a medical electronic optical instrument that integrates optical, mechanical, and electronic technologies and can be inserted into the cavities of the human body and organs for direct observation, diagnosis, and treatment. To observe changes in the microstructures of the digestive tract mucosa, such as glandular openings, microvessels, and capillaries, a zoom lens is added to a standard electronic endoscope to achieve optical magnification of the mucosal tissue. This facilitates the determination of the pathological nature of mucosal lesions, clarifies the extent of lesion infiltration, and improves the accuracy of biopsies.

[0003] Currently, existing endoscope zoom adjustment schemes generally employ the following approach: a zoom lens achieves zoom by moving the zoom lens along the optical axis. The operating unit includes a mechanism to control the movement of the zoom lens. This control mechanism can move the zoom lens by electrically or manually pushing and pulling a steel wire, thus switching between wide-angle and telephoto ends. However, this current endoscope zoom adjustment structure, whether using electric or manual methods to push and pull the steel wire, faces the problem that the steel wire is prone to bending when pushed, failing to transmit the pushing force to the zoom lens. This results in ineffective zoom lens movement or incomplete movement, making it difficult to guarantee the expected zoom effect. Summary of the Invention

[0004] The purpose of this invention is to provide an electronic endoscope zoom mechanism that can effectively solve the problem that the zoom lens cannot be effectively driven or cannot be driven in place due to the bending of the steel wire when the steel wire is pushed, thereby ensuring the realization of the zoom function of the electronic endoscope.

[0005] The technical solution of this invention is:

[0006] An electronic endoscope zoom mechanism includes:

[0007] Base;

[0008] Moving parts;

[0009] A zoom drive mechanism, which is mounted on a base to drive moving parts to move;

[0010] Steel wire, the steel wire connecting the moving parts to the zoom lens of the electronic endoscope;

[0011] Steel wire buckling-resistance structure, the steel wire buckling-resistance structure includes:

[0012] Anti-buckling channel;

[0013] Capillary tube, which extends from the moving part to the buckling-resistant channel;

[0014] A flexible tube has one end near or extending into an anti-bending channel, and the other end directly or indirectly connected to a zoom lens. A steel wire passes sequentially through a capillary tube, an anti-bending channel, and a flexible tube, with the capillary tube fixed to the steel wire. Because the steel wire connecting the moving part and the electronic endoscope is sequentially confined within the capillary tube, the anti-bending channel, and the flexible tube, and the capillary tube moves with the steel wire, the section of the steel wire within the capillary tube is reinforced by the capillary tube, preventing bending during thrust. Similarly, the section of the steel wire within the anti-bending channel and the flexible tube is confined by the anti-bending channel and the flexible tube, preventing bending during thrust. Thus, when the steel wire is pushed, bending can be effectively prevented, reliably transmitting the thrust to the zoom lens. This effectively solves the problem of the zoom lens not being effectively pushed or not pushed to its proper position due to steel wire bending, ensuring the realization of the electronic endoscope's zoom function.

[0015] Preferably, the flexible tube is a spring tube, with one end of the spring tube near or extending into the anti-bending channel fixed to the base, and the spring tube is in a taut state. Because the flexible tube is a spring tube and is in a taut state, during actual endoscopy operation, on the one hand, it ensures that the spring tube can be bent as needed, allowing the steel wire to move smoothly within the spring tube; on the other hand, the taut state prevents the steel wire from causing the spring tube to bend when the steel wire is pushed.

[0016] As a preferred option, it also includes:

[0017] The fixing plate is directly or indirectly fixed to the base by bolts, and the fixing plate is provided with fixing sleeve slots;

[0018] A spring tube retaining sleeve is fitted onto the spring tube and fixedly connected to it. The retaining sleeve is positioned near one end of the spring tube and is secured within a retaining slot. This allows for convenient and stable fixation of one end of the spring tube to the base, ensuring the spring tube is under tension.

[0019] Preferably, the system also includes a wide-angle end limiting member and a telephoto end limiting member, with the movable member located between the wide-angle end limiting member and the telephoto end limiting member. By using the wide-angle end limiting member and the telephoto end limiting member to restrict the movement of the movable member, the travel of the wire is limited. This prevents damage to the zoom lens due to excessive wire pulling, and also prevents damage to the zoom lens and unnecessary travel in the zoom drive mechanism due to excessive wire pushing.

[0020] As a preferred option, the telephoto end limiting component includes:

[0021] The positioning seat has mounting screw holes on the side facing the moving part;

[0022] The telephoto end adjustment lever is threadedly connected to the mounting screw hole. This allows the telephoto end adjustment lever to be adjusted to a suitable position, limiting the movement of the component so that it contacts the adjustment lever precisely when the zoom lens reaches its telephoto end. Furthermore, the position of the telephoto end adjustment lever can be adjusted to accommodate the zoom distance requirements of different zoom lenses.

[0023] Preferably, the anti-buckling channel is located on the telephoto end limiting member, and the anti-buckling channel is parallel to the moving direction of the moving member. This facilitates the actual processing and manufacturing of the anti-buckling channel.

[0024] Preferably, the wide-angle end limiting member has an oblong hole, the length direction of which is parallel to the moving direction of the moving member. A bolt is installed inside the oblong hole, and the wide-angle end limiting member is directly or indirectly fixed to the base by the bolt. In this way, by adjusting the position of the wide-angle end limiting member, the moving member can just contact the wide-angle end limiting member when the zoom lens reaches the wide-angle end.

[0025] Preferably, the movable component is provided with a wire mounting hole, and one end of the wire extends into the wire mounting hole and is fixed therein. This facilitates stable and reliable installation of the wire onto the movable component.

[0026] Preferably, one end of the capillary tube is close to or extends into the wire mounting hole, and the other end of the capillary tube is close to or extends into the anti-bending channel. This further prevents the wire from buckling when pushed.

[0027] Preferably, the base is provided with a guide member, and the movable member slides along the guide member. The movable member includes:

[0028] The slider slides along the guide.

[0029] An adjusting column, one end of which is connected to the slider via a thread;

[0030] The adjusting seat slides along the guide member. The adjusting seat is provided with an adjusting column mounting hole. The other end of the adjusting column is inserted into the adjusting column mounting hole. The adjusting seat is also provided with an adjusting column set screw for locking and fixing the adjusting column.

[0031] The beneficial effect of this invention is that it can effectively solve the problem that the zoom lens cannot be effectively pushed or cannot be pushed in place due to the bending of the steel wire when pushing the steel wire, thereby ensuring the realization of the zoom function of the electronic endoscope. Attached Figure Description

[0032] Figure 1 This is a schematic diagram of an assembly structure of the electronic endoscope zoom mechanism of the present invention.

[0033] Figure 2 This is an exploded view of the electronic endoscope zoom mechanism of the present invention.

[0034] Figure 3 This is a partial cross-sectional structural diagram of the electronic endoscope zoom mechanism of the present invention.

[0035] In the picture:

[0036] Base 1;

[0037] Zoom drive mechanism 2;

[0038] Guide component 3, guide groove 3.1;

[0039] Wide-angle end limiting component 4;

[0040] Slider 5;

[0041] Adjusting column 6;

[0042] Adjustment seat 7;

[0043] Moving part 8, wire mounting hole 8.1;

[0044] Telephoto end adjustment lever 9;

[0045] Positioning seat 10;

[0046] Spring tube fixing sleeve 11;

[0047] Fixed plate 12, fixed sleeve snap 12.1;

[0048] Flexible tube 13;

[0049] Zoom lens 14;

[0050] 15 U-shaped steel frame;

[0051] Capillary 16;

[0052] 17 steel wires;

[0053] Anti-buckling channel 18. Detailed Implementation

[0054] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments:

[0055] Specific Implementation Example 1, such as Figure 1 , Figure 2 , Figure 3As shown, an electronic endoscope zoom mechanism includes a base 1, a zoom drive mechanism 2, a moving part 8, a steel wire 17, and a steel wire anti-bending structure. A guide 3 is provided on the base. The moving part slides along the guide. In this embodiment, a guide groove 3.1 is provided on the guide, and the moving part slides along the guide groove. Of course, the guide can also be a guide rail or a guide rod. The zoom drive mechanism 2 is mounted on the base and drives the moving part 8 to move along the guide. The zoom drive mechanism can be electric, pneumatic, or manual. The steel wire 17 connects the moving part 8 to the zoom lens 14 of the electronic endoscope. The specific methods and structures of the zoom drive mechanism and zoom lens are existing technologies, and their specific structures are not the inventive point of this application. Therefore, this application will not elaborate on conventional technical means such as the specific methods and structures of the zoom drive mechanism and zoom lens.

[0056] The steel wire anti-bending structure includes an anti-bending channel 18, a capillary tube 16, and a flexible tube 13. The capillary tube 16 is located between the moving member and the anti-bending channel. The capillary tube extends from the moving member to the anti-bending channel. One end of the flexible tube 13 is close to or extends into the anti-bending channel. The other end of the flexible tube is directly or indirectly connected to the zoom lens; in this embodiment, the other end of the flexible tube is directly connected to the zoom lens. The end of the flexible tube 13 close to or extending into the anti-bending channel is fixed to the base 1. The steel wire 17 passes sequentially through the capillary tube, the anti-bending channel, and the flexible tube, and the capillary tube 16 is fixed to the steel wire 17. In this embodiment, the capillary tube is fixed to the steel wire by welding or bonding. Because the steel wire connecting the moving part and the electronic endoscope is sequentially confined within a capillary tube, an anti-bending channel, and a flexible tube, with the capillary tube fixed to the steel wire and moving with it, the section of the steel wire located within the capillary tube is reinforced by the capillary tube to prevent bending during the pushing process; the section of the steel wire located within the anti-bending channel and the flexible tube is confined by the anti-bending channel and the flexible tube to prevent bending during the pushing process; thus, when the steel wire is pushed, bending of the steel wire can be effectively prevented, and the pushing force can be reliably transmitted to the zoom lens. This effectively solves the problem of the zoom lens not being effectively pushed or not being pushed to the correct position due to the steel wire bending, thus ensuring the realization of the zoom function of the electronic endoscope.

[0057] Specifically, such as Figure 1 , Figure 2 , Figure 3 As shown, an electronic endoscope focusing mechanism further includes a U-shaped channel steel frame 15. The U-shaped channel steel frame is fixed on a base. Guide members are installed in the U-shaped channel of the U-shaped channel steel frame.

[0058] The movable component 8 includes a slider 5, an adjusting column 6, and an adjusting seat 7. The slider slides along the guide groove of the guide component. The adjusting seat slides along the guide groove of the guide component. One end of the adjusting column is threadedly connected to the slider. The adjusting seat has an adjusting column mounting hole. The other end of the adjusting column is inserted into the adjusting column mounting hole. The adjusting seat also has an adjusting column set screw for locking and fixing the adjusting column. The adjusting column set screw locks and fixes the other end of the adjusting column in the adjusting column mounting hole.

[0059] Furthermore, such as Figure 1 , Figure 2 , Figure 3 As shown, the movable component 8 is provided with a wire mounting hole 8.1. One end of the wire extends into the wire mounting hole and is fixed therein. The movable component is provided with a wire set screw, which locks the wire in place within the wire mounting hole. This facilitates stable and reliable installation of the wire onto the movable component.

[0060] In this embodiment, the adjusting column 6 has an inner hole penetrating both ends of the adjusting column. The adjusting seat 7 has an inner hole connecting the bottom end of the wire mounting hole to the outer side of the adjusting seat. The inner hole of the adjusting column and the inner hole of the adjusting seat together constitute the wire mounting hole. A wire set screw is provided on the adjusting column.

[0061] One end of the capillary tube 16 is close to or extends into the wire mounting hole 8.1, and the other end of the capillary tube 16 is close to or extends into the anti-bending channel 18. In this embodiment, one end of the capillary tube extends into the wire mounting hole, and the other end of the capillary tube extends into the anti-bending channel. In this way, buckling of the wire can be further avoided when it is pushed.

[0062] Furthermore, such as Figure 1 , Figure 2 , Figure 3 As shown, the zoom mechanism of the electronic endoscope also includes a wide-angle end limiting member 4 and a telephoto end limiting member. The wide-angle end limiting member and the telephoto end limiting member are directly or indirectly disposed on the base. The moving member is located between the wide-angle end limiting member and the telephoto end limiting member. In this embodiment, the slider faces the wide-angle end limiting member, and the adjusting seat faces the telephoto end limiting member. The wide-angle end limiting member and the telephoto end limiting member restrict the movement of the moving member, thereby limiting the stroke of the wire. This prevents damage to the zoom lens due to excessive wire pulling and also prevents damage to the zoom lens due to excessive wire pushing and invalid stroke of the zoom drive mechanism. In this embodiment, the wide-angle end limiting member 4 is installed in the guide groove of the guide member; the telephoto end limiting member is installed in the U-shaped groove of the U-shaped groove steel frame.

[0063] Furthermore, such as Figure 1 , Figure 2 , Figure 3As shown, the telephoto end limiting component includes a positioning seat 10 and a telephoto end adjusting rod 9. The positioning seat is fixed on the base. A mounting screw hole is provided on the side of the positioning seat facing the moving component. In this embodiment, the axis of the mounting screw hole is parallel to the moving direction of the moving component. The telephoto end adjusting rod is threadedly connected to the mounting screw hole. The telephoto end adjusting rod is parallel to the moving direction of the moving component. Thus, by adjusting the position of the telephoto end adjusting rod, it can be adjusted to a suitable position to limit the moving component, ensuring that the moving component just contacts the telephoto end adjusting rod when the zoom lens reaches the telephoto end. When it is necessary to convert the endoscope image from wide-angle to telephoto, the zoom drive mechanism pushes the moving component along the guide towards the telephoto end adjusting rod until the adjusting seat of the moving component abuts against the end of the telephoto end adjusting rod. During this process, the moving component pushes the zoom lens in the zoom lens as scheduled through the steel wire, and the endoscope image presents a wide-angle effect. Furthermore, the position of the telephoto end adjusting rod can be adjusted to adapt to the zoom distance requirements of different zoom lenses.

[0064] Furthermore, such as Figure 2 , Figure 3 As shown, the anti-buckling channel 18 is disposed on the telephoto end limiting member, and the anti-buckling channel is parallel to the moving direction of the moving member. In this embodiment, the anti-buckling channel is disposed on the positioning seat 10. This facilitates the actual processing and manufacturing of the anti-buckling channel.

[0065] Furthermore, such as Figure 1 , Figure 2 , Figure 3 As shown, the wide-angle end limiting member 4 has an oblong hole. The length direction of the oblong hole is parallel to the moving direction of the moving member. A bolt is installed inside the oblong hole. The wide-angle end limiting member is directly or indirectly fixed to the base by this bolt. In this way, by adjusting the position of the wide-angle end limiting member, the moving member can just contact the wide-angle end limiting member when the zoom lens reaches the wide-angle end. When it is necessary to convert the endoscope image from telephoto to wide-angle, the zoom drive mechanism drives the moving member to move along the guide member towards the wide-angle end limiting member until the slider of the moving member abuts against the wide-angle end limiting member. During this process, the moving member pulls the zoom lens in the zoom lens through the steel wire, and the endoscope image presents a telephoto effect.

[0066] In this second specific embodiment, the remaining structure is the same as in the first specific embodiment, except that...

[0067] like Figure 1 , Figure 2 , Figure 3As shown, the flexible tube 13 is a spring tube. One end of the spring tube, which is close to or extends into the anti-bending channel, is fixed to the base, and the spring tube is in a taut state. In this embodiment, the spring tube being in a taut state means that the spring tube is in a stretched state. Since the flexible tube is a spring tube, and the spring tube is in a taut state, in the actual operation of the endoscope, on the one hand, it can be ensured that the spring tube can be bent as needed, and the steel wire can be pushed and pulled smoothly within the spring tube; on the other hand, the spring tube being in a taut state can prevent the steel wire from causing the spring tube to bend when the steel wire is pushed.

[0068] The electronic endoscope zoom mechanism also includes a fixing plate 12 and a Bourdon tube fixing sleeve 11. The fixing plate is directly or indirectly fixed to the base by bolts. The fixing plate is provided with a fixing sleeve slot 12.1. The Bourdon tube fixing sleeve is fitted onto the Bourdon tube. The Bourdon tube fixing sleeve is fixedly connected to the Bourdon tube. In this embodiment, the Bourdon tube fixing sleeve and the Bourdon tube are fixedly connected by welding or bonding. The Bourdon tube fixing sleeve is located near one end of the Bourdon tube, where one end of the Bourdon tube refers to the end of the Bourdon tube that is close to or extends into the anti-bending channel. The Bourdon tube fixing sleeve 11 is engaged in the fixing sleeve slot 12.1, thereby fixing one end of the Bourdon tube that is close to or extends into the anti-bourdon channel to the base. In this way, one end of the Bourdon tube can be conveniently and stably fixed to the base, so that the Bourdon tube is in a taut state.

[0069] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Any simple modifications, alterations, and equivalent transformations made to the above embodiments based on the technical essence of the present invention shall still fall within the protection scope of the present invention.

Claims

1. An electronic endoscope zoom mechanism, comprising: Base; Moving parts; A zoom drive mechanism, which is mounted on a base to drive moving parts to move; A steel wire, the steel wire connecting the movable component to the zoom lens of an electronic endoscope; characterized in that it further includes a steel wire anti-bending structure, the steel wire anti-bending structure comprising: Anti-buckling channel; Capillary tube, which extends from the moving part to the buckling-resistant channel; A flexible tube, one end of which is close to or extends into the anti-bending channel, and the other end of which is directly or indirectly connected to the zoom lens. The steel wire passes through the capillary tube, the anti-bending channel and the flexible tube in sequence, and the capillary tube is fixed on the steel wire.

2. The electronic endoscope zoom mechanism according to claim 1, characterized in that, The flexible tube is a spring tube, with one end of the spring tube near or extending into the anti-bending channel fixed to the base, and the spring tube is in a taut state.

3. The electronic endoscope zoom mechanism according to claim 2, characterized in that, it further includes... include: The fixing plate is directly or indirectly fixed to the base by bolts, and the fixing plate is provided with fixing sleeve slots; A spring tube fixing sleeve is fitted onto the spring tube and fixedly connected to it. The spring tube fixing sleeve is located near one end of the spring tube and is snapped into the fixing sleeve slot.

4. The electronic endoscope zoom mechanism according to claim 1, 2, or 3, characterized in that, It also includes a wide-angle end limiting member and a telephoto end limiting member, with the moving member located between the wide-angle end limiting member and the telephoto end limiting member.

5. The electronic endoscope zoom mechanism according to claim 4, characterized in that, The telephoto end limiting component includes: The positioning seat has mounting screw holes on the side facing the moving part; The telephoto end adjustment rod is connected to the mounting screw hole via a thread.

6. The electronic endoscope zoom mechanism according to claim 4, characterized in that, The anti-bending channel is set on the long focal length end limiting member, and the anti-bending channel is parallel to the moving direction of the moving member.

7. The electronic endoscope zoom mechanism according to claim 4, characterized in that, The wide-angle end limiting member is provided with a waist-shaped hole, the length direction of which is parallel to the moving direction of the moving member. A bolt is provided in the waist-shaped hole, and the wide-angle end limiting member is directly or indirectly fixed to the base by the bolt.

8. The electronic endoscope zoom mechanism according to claim 1, 2, or 3, characterized in that, The movable component is provided with a wire mounting hole, and one end of the wire extends into the wire mounting hole and is fixed inside the wire mounting hole.

9. The electronic endoscope zoom mechanism according to claim 8, characterized in that, One end of the capillary tube is close to or extends into the wire mounting hole, and the other end of the capillary tube is close to or extends into the anti-bending channel.

10. The electronic endoscope zoom mechanism according to claim 1, 2, or 3, characterized in that, The base is provided with a guide member, and the movable member slides along the guide member. The movable member includes: The slider slides along the guide. An adjusting column, one end of which is connected to the slider via a thread; The adjusting seat slides along the guide member. The adjusting seat is provided with an adjusting column mounting hole. The other end of the adjusting column is inserted into the adjusting column mounting hole. The adjusting seat is also provided with an adjusting column set screw for locking and fixing the adjusting column.

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