Eccentric endoscope

Abstract

The eccentric endoscope comprises a lens assembly, a sleeve assembly and a handle assembly, the lens assembly comprises a lens part and a lens tube connected with the lens part, the sleeve assembly comprises a main channel and at least one water injection channel, and the lens tube is eccentrically arranged in the main channel in a penetrating mode. An adjusting mechanism for adjusting rotation of the endoscope tube is arranged on the handle assembly, a rotary supporting hole for supporting the endoscope tube is formed in one end of the sleeve assembly, and the other end of the sleeve assembly is connected with the handle assembly. According to the utility model, the lens part and the sleeve assembly are accommodated, arranged and mounted, and when in use, the lens part is accurately overturned by utilizing the adjusting mechanism and is exposed, and meanwhile, enough instrument operation space and a fluid channel are exposed, so that the examination and treatment efficiency is ensured on the premise of not hurting a patient, the structure is simple and practical, and the operation is convenient and fast.

Description

TECHNICAL FIELD

[0001] The utility model relates to endoscope production technical field, especially a eccentric endoscope. BACKGROUND

[0002] When carrying out uterine examination and treatment, the frequency of using endoscope is very high, but limited to the use environment of small opening of cervical orifice, the lens part of large size will scratch the cervical orifice to form secondary injury, but the outer diameter of the lens part must be maintained in a certain size range, and the smaller size will inevitably make the instrument channel in the instrument tube smaller, the narrow instrument channel will increase the difficulty of operation, reduce the operation efficiency, and also cause the flow efficiency of fluid in the process of water injection and suction, hinder normal examination and treatment. SUMMARY

[0003] In view of the above technical problems of prior art, the utility model wants to solve the technical problem of providing an eccentric endoscope which can guarantee the instrument operation space and is convenient for passing through the cervical orifice.

[0004] To solve the above technical problems, one technical scheme of the utility model is to provide an eccentric endoscope, which comprises a lens assembly, a sleeve assembly and a handle assembly, the lens assembly comprises a lens part and a lens tube connected with the lens part, the sleeve assembly comprises a main channel and at least one water injection channel, the lens tube is eccentrically arranged in the main channel, an adjusting mechanism for adjusting the rotation of the lens tube is arranged on the handle assembly, one end of the sleeve assembly is provided with a rotary support hole for supporting the lens tube, and the other end of the sleeve assembly is connected with the handle assembly; when in use, the adjusting mechanism drives the lens tube to rotate and synchronously drives the lens part to rotate, so as to leave a channel space for the surgical instrument to enter in the position of the main channel.

[0005] By adopting the above structure, the lens part is placed in the corresponding position of the sleeve assembly when not in use, the space occupied by installation is reduced, the cervical orifice is convenient to pass through, after the lens part enters the uterus, the lens tube is driven to rotate by the adjusting mechanism, that is, the lens part is synchronously driven to rotate, at the same time, the space of the corresponding position of the sleeve assembly is exposed, the operation space of the instrument and the flow smoothness of the required fluid are guaranteed, at the same time, water needs to be injected from the water injection channel, and the used water is discharged through the main channel under the action of negative pressure, so that the structure is simple and compact, the moving position precision is high, and the use is flexible.

[0006] In order to simplify the structure and facilitate installation, as a preferred, the water injection channel comprises a water injection pipe, the handle assembly comprises a handle in which the water injection pipe is inserted, and a support pipe assembly which is sleeved with the handle and communicates with the water injection pipe, the support pipe assembly comprises a front fixed seat which is sleeved in the handle, an outer pipe is arranged on the front fixed seat, a rear support seat is arranged in the fixed sleeve, a water containing cavity which communicates with the water injection pipe is formed between the inner walls of the front fixed seat, the rear support seat and the fixed sleeve.

[0007] In order to facilitate the installation of the drain pipe and the lens pipe, as a preferred, the main channel comprises a front support pipe which is inserted in the outer pipe, a front support seat, and a drain pipe which is sequentially inserted through the front support pipe and the front support seat, the sleeve assembly comprises a guide sleeve which is arranged at one end of the front support pipe, a notch is arranged on one side of the guide sleeve, a rotary support hole which penetrates the notch is arranged on the other side, an installation hole which is arranged along the axial direction of the front support seat is arranged on the pipe wall of the front support seat at a position corresponding to the rotary support hole, and a lens pipe which is connected with the lens part is inserted through the rotary support hole, the non-connected end of the lens pipe is sequentially inserted through the installation hole and the rear support seat and out of the handle.

[0008] In order to facilitate the installation, as a preferred, a first through hole is arranged on the rear support seat for the insertion of the lens pipe, and the lens pipe is arranged in a slanting manner with the low front and high rear at the position between the rear support seat and the front support pipe; a second through hole for the insertion of the drain pipe and a third through hole which is fixedly connected with the insertion end of the water injection pipe are arranged.

[0009] In order to simplify the installation structure and facilitate the discharge of waste water, as a preferred, a water outlet sleeve is arranged in the handle corresponding to the position of the end of the drain pipe which is inserted out of the rear support seat, a connecting hole which is sleeved with the drain pipe is arranged at one end of the water outlet sleeve, a taper hole is arranged at the other end, a water suction pipe which communicates with the taper hole is arranged on the water outlet sleeve, an installation sleeve is arranged on the handle corresponding to the position of the water outlet sleeve, and the water outlet sleeve is fixedly sleeved on the installation sleeve; an instrument hole is arranged on the installation sleeve, a sealing support frame is embedded in the taper hole, and a sealing support hole which communicates with the taper hole and the instrument hole is arranged on the support frame.

[0010] In order to facilitate the injection of fluid and maintain the distance from the position of the drain pipe opening, so as to avoid the failure of water injection cleaning, as a preferred, a water passing cavity which communicates with the water containing cavity is formed between the outer side wall of the drain pipe and the inner side wall of the front support pipe, and a water outlet hole which communicates with the water passing cavity is arranged on the front support pipe adjacent to the position of the guide sleeve.

[0011] In order to avoid the use of interference, as a preferred, the lens part is arranged at the position of the notch on the guide sleeve, the outer side wall of the lens part is in a circular arc surface structure, and a certain amount of space is provided on the inner side wall of the notch.

[0012] In order to simplify the structure and effectively control the precision of the overturning position, as preferred, an opening is arranged on the handle, the adjusting mechanism comprises a dial gear arranged in the opening, a socket is arranged on the inner side wall of one side of the opening, a connecting pin is arranged on the dial gear, a fixing cylinder is arranged on the rear support base, the fixing cylinder is sleeved with one end of the connecting pin, and the other end of the connecting pin is connected with the socket; a driven gear is sleeved on the mirror tube at a position corresponding to the dial gear, and the dial gear is connected with the driven gear in meshing.

[0013] In order to simplify the installation structure, as preferred, a sensing device is further arranged in the handle at a position corresponding to the dial gear, the sensing device comprises a sensing rod inserted on the side wall of the dial gear, a proximity switch is arranged on the inner side wall of the handle at a position corresponding to the sensing rod, and the proximity switch is wirelessly connected with the PLC controller.

[0014] In order to prevent fluid leakage, as preferred, a front fixing tube and a rear fixing tube are embedded in the first through hole, a groove structure is formed between the two fixing tubes and the hole wall of the first through hole, a sealing ring is arranged in the groove structure, and the mirror tube is sequentially arranged through the front fixing tube, the sealing ring and the rear fixing tube from front to back.

[0015] Beneficial effects: the lens part and the sleeve assembly are contained and arranged, in use, the lens part is accurately overturned and exposed by using the adjusting mechanism, sufficient instrument operation space and fluid channel are exposed, the efficiency of examination and treatment is ensured without hurting the patient, the structure is simple and practical, and the operation is convenient. BRIEF DESCRIPTION OF DRAWINGS

[0016] The drawings described herein are used to provide further understanding of the present application, and form a part of the present application, the schematic embodiments of the present application and the description thereof are used to explain the present application, and do not constitute improper limitation on the present application. In the drawings:

[0017] Figure 1 It is a structural schematic diagram of the utility model.

[0018] Figure 2 It is Figure 1 It is an enlarged view of A in the figure.

[0019] Figure 3 It is Figure 1 It is an enlarged view of B in the figure.

[0020] Figure 4 It is Figure 1 It is an enlarged view of C in the figure.

[0021] Figure 5 It is a mounting structure schematic diagram of the drain pipe.

[0022] Figure 6It is the sectional stereogram structure schematic view of the front support seat.

[0023] Figure 7 It is the structure schematic view of the guide sleeve.

[0024] Figure 8 It is the structure schematic view of the rear support seat.

[0025] Figure 9 It is the structure schematic view of the gear.

[0026] Figure 10 It is the stereogram structure view of the utility model.

[0027] Figure 11 It is the sectional stereogram structure schematic view of the front support seat. Figure 10

[0028] Figure 12 It is the use state view of the utility model.

[0029] The meaning of each sign in the drawing is as follows:

[0030] Handle-1; front fixed seat-10; fixed sleeve-101; water injection pipe-11; outer pipe-12; front support pipe-121 rear support seat-13; first via hole-131; second via hole-132; third via hole-133; fixed cylinder-134; water containing cavity-14; front support seat-15; mounting hole-151; drain pipe-16; water passing through cavity-161; water outlet hole-162; guide sleeve-17; rotary support hole-171; let position inclined surface-172; mounting sleeve-18; instrument hole-181; sealing support frame-19; sealing support hole-191;

[0031] Lens part-2; mirror tube-20; driven tooth-21; transition inclined surface-22; water outlet sleeve-3; connecting hole-30; water pumping pipe-31; taper hole-32;

[0032] Gear-4; jack plug-40; connecting pin-41; induction rod-5; proximity switch-50; front fixed pipe-51; rear fixed pipe-52; sealing ring-53. DETAILED DESCRIPTION

[0033] By Figures 1 to 12 ​As shown, the utility model discloses a lens assembly, sleeve assembly and handle assembly, the lens assembly includes lens part 2 and with lens part 2 is connected mirror tube 20, the sleeve assembly includes main channel and at least one water injection channel, the mirror tube 20 eccentric wear in main channel, be provided with the adjusting mechanism of adjusting mirror tube 20 rotation on handle assembly, one end of sleeve assembly is provided with the rotary support hole 171 of supporting mirror tube 20, the other end of sleeve assembly is connected with handle assembly, when using, the adjusting mechanism drive mirror tube rotation and drive lens part 2 synchronous rotation, thereby in main channel position gives the channel space of surgical instrument to let in.

[0034] Specifically, the water injection channel includes water injection pipe 11, the handle assembly includes handle 1 with water injection pipe 11 and with handle 1 sleeve and with water injection pipe 11 communication support pipe assembly, the support pipe assembly includes sleeve in handle 1 front fixed base 10 and with front fixed base 10 sleeve fixed sleeve 101, be equipped with outer tube 12 on front fixed base 10, be equipped with rear support base 13 in fixed sleeve 101, the inner wall between front fixed base 10, rear support base 13 and fixed sleeve 101 is enclosed and forms a water cavity 14 with water injection pipe 11 communication;The main channel includes front support pipe 121, front support base 15 in outer tube 12 insert and drainage pipe 16 sequentially wear through front support pipe 121 and front support base 15, the sleeve assembly includes the guide sleeve 17 of communication setting in one end of front support pipe 121, be equipped with notch on one side of guide sleeve 17, the other side is equipped with the rotary support hole 171 with the penetration of notch, be equipped with the mounting hole 151 of communication setting along the axial direction of front support base 15 on the pipe wall of front support base 15 at the position of rotary support hole 171, the mirror tube 20 of being connected with lens part 2 is worn in rotary support hole 171, the non-connection end of mirror tube 20 sequentially wears through mounting hole 151 and rear support base 13 and wears out handle 1 rear.

[0035] Be equipped with first via hole 131 on rear support base 13 for mirror tube 20 wear, and mirror tube 20 is inclined and arranged with low front and high rear at the position between rear support base 13 and front support pipe 121;Front fixed tube 51 and rear fixed tube 52 are embedded in first via hole 131, the hole wall between two fixed tubes and first via hole 131 is enclosed and forms a groove structure, be equipped with sealing ring 53 in the groove structure, the mirror tube 20 sequentially wears through front fixed tube 51, sealing ring 53 and rear fixed tube 52 from front to back;Second via hole 132 for drainage pipe 16 wear is also equipped on rear support base 13.

[0036] A water outlet sleeve 3 is arranged in the handle 1 corresponding to the position where the drain pipe 16 passes through one end of the rear support seat 13, a connecting hole 30 is arranged at one end of the water outlet sleeve 3 and is sleeved with the drain pipe 16, a taper hole 32 is arranged in communication at the other end of the water outlet sleeve 3, a water pumping pipe 31 is arranged in communication with the taper hole 32, an installation sleeve 18 is arranged on the handle 1 corresponding to the position of the water outlet sleeve 3, and the water outlet sleeve 3 is fixedly sleeved on the installation sleeve 18; an instrument hole 181 is arranged on the installation sleeve 18, a sealing support frame 19 is embedded in the taper hole 32, the sealing support frame 19 is preferably made of silicone rubber, a sealing support hole 191 is arranged on the sealing support frame 19 and is in communication with the taper hole 32 and the instrument hole 181, and the sealing support hole 191 is in a closed state when the instrument is not inserted and is in an open state when the instrument is inserted.

[0037] A water passing cavity 161 in communication with the water containing cavity 14 is formed between the outer side wall of the drain pipe 16 and the inner side wall of the front support pipe 121, and a water outlet hole 162 in communication with the water passing cavity 161 is arranged on the front support pipe 121 adjacent to the guide sleeve 17.

[0038] The lens part 2 is located at the notch position of the guide sleeve 17, the outer side wall of the lens part 2 is a circular arc surface structure, and a gap-providing inclined surface 172 is arranged on the inner side wall of the notch.

[0039] An opening is arranged on the handle 1, the adjusting mechanism comprises a dial gear 4 arranged in the opening, an insertion hole 40 is arranged on the inner side wall of one side of the opening, a connecting pin 41 is arranged to pass through the dial gear 4, a fixing cylinder 134 is arranged on the rear support seat 13, the fixing cylinder 134 is sleeved with one end of the connecting pin 41, the other end of the connecting pin 41 is inserted into the insertion hole 40 in a connected mode, a driven gear 21 is sleeved on the mirror tube 20 corresponding to the position of the dial gear 4, and the dial gear 4 is in meshing connection with the driven gear 21.

[0040] The lens part 2 comprises a lens seat, a camera is arranged in the lens seat, a lamp group is arranged on the left side and the right side of the camera respectively, the mirror tube 20 is a hollow circular tube structure, the mirror tube 20 is fixedly sleeved with the eccentric hole of the lens part, the wires of the camera and the lamp group pass through the mirror tube 20 and extend out of the handle 1, and the extending end of the wire is connected with a PLC controller; a transition inclined surface 22 is arranged on one end of the lens seat and faces the rotary support hole 171.

[0041] A sensing device is further arranged in the handle 1 corresponding to the position of the dial gear 4, the sensing device comprises a sensing rod 5 inserted on the side wall of the dial gear 4, and a proximity switch 50 is arranged on the inner side wall of the handle 1 corresponding to the position of the sensing rod 5; and the proximity switch 50 is wirelessly connected with the PLC controller.

[0042] The use principle of the utility model is as follows:

[0043] As Figure 1 , Figure 10 and Figure 11 shown, before use, the whole lens part 2 is located at the gap position of the guide sleeve 17, and blocks part of the cross-sectional position of the rotary support hole 171, at the same time, the outer side wall of the lens seat of the lens part 2 and the outer side wall of the guide sleeve 17 are kept flush to avoid scratching the cervical canal due to the excessive size.

[0044] In use, as Figures 2 to 9 and Figure 12 shown, after the lens part 2 enters the uterus, the pawl 4 is actuated to rotate the meshed driven tooth 21, and the driven tooth 21 is fixedly sleeved with the transmission shaft 20, that is, the transmission shaft 20 also rotates synchronously and drives the connected lens part 2 to rotate out of the gap position of the guide sleeve 17, at this time, the through hole in the middle of the guide sleeve 17 is communicated with the cross-sectional position of the drainage pipe 16, that is, the passage cross section of the drainage pipe 16 is increased, and the setting of the yield inclined surface 172 also avoids the interference of the rotation; then, as the pawl 4 continues to rotate, the lens part 2 also continues to rotate, when the induction rod 5 rotates to the position of the proximity switch 50 (preferably, at this time, the lens part 2 is rotated by 180°, and the pawl 4 is only rotated by 45°), the proximity switch 50 sends a signal to the PLC controller connected wirelessly, and the PLC controller sends a signal in the background at random, and then, according to the received signal, the background automatically flips the imaging picture angle of the camera of the lens part 2 on the system, so as to keep the forward viewing angle picture (similar to flipping the picture to the forward use state), so as to quickly and effectively perform inspection and treatment.

[0045] Then, water is injected at the water injection pipe 11, the water in the injection handle 1 flows into the water passing cavity 161 through the water containing cavity 14, and is discharged into the uterus through the water outlet hole 162, the used wastewater flows into the drainage pipe 16, the water suction pipe 31 is communicated with the negative pressure machine (not marked), the negative pressure machine is started, under the negative pressure in the water suction pipe 31, the wastewater flows into the water outlet sleeve 3 through the drainage pipe 16, and is discharged by the water suction pipe 31; since there is only a rotating action at the position of the first through hole 131, in order to prevent the wastewater from leaking out, the front fixed pipe 51 and the rear fixed pipe 52 are embedded in the first through hole 131, a groove structure is formed between the two fixed pipes and the hole wall of the first through hole 131, a sealing ring 53 is arranged in the groove structure, and the lens tube 20 is sequentially arranged through the front fixed pipe 51, the sealing ring 53 and the rear fixed pipe 52, which ensures the rotation and also ensures the sealing during use.

[0046] It should be noted that, in combination with Figure 2 and Figure 3As shown, the mirror tube 20 is arranged in a low front and high back slope at the position between the rear support seat 13 and the front support tube 15, and the slope position is just located at the position of the water cavity 14, which facilitates the engagement connection between the mirror tube 20 and the gear teeth 4, and forms an angle gap between the mirror tube 20 and the drain pipe 16. Since the mirror tube 20 can rotate on the front support seat 15, the rotation interference is reduced, and the installation space of the sealing ring 53 for the mirror tube 20 on the rear support seat 13 is provided. At the same time, as shown in Figure 7 , the lower part of the rotary support hole 171 is provided with a curved section, which can support the mirror tube 20, and the position also separates the mirror tube 120 from the outer wall of the drain pipe 16, reduces the rotation interference between the lens part 2 and the drain pipe 16, and the rotation of the mirror tube 20 is smoother under the condition of reducing the contact area.

[0047] As shown in Figure 1 and Figure 4 , during use, other instruments used are sequentially arranged through the instrument hole 181, the sealing support hole 191, the drain pipe 16 and the rotary support hole 171 into the uterus, which is convenient for operation and does not occupy too much cross-sectional area of water flow.

[0048] In order to facilitate operation and ensure the rapid inspection, the gear ratio of the gear teeth 4 and the driven teeth 21 is preferably 4:1 to quickly flip the lens part 2. At the same time, the flip angle of the induction rod 5 is also reduced, so that the proximity switch 50 can send a signal in time when the lens part 2 is quickly flipped to the position, and the use angle of the camera is quickly adjusted in the background, so as to ensure the accuracy of the inspection and treatment.

[0049] After use, the gear teeth 4 are moved again to drive the driven teeth 21 to rotate and make the lens part 2 rotate to the gap position of the guide sleeve 17, and then it can be taken out from the uterus.

[0050] It should be noted that the wires of the lens part 2, including the wires of the camera and the lamp group (as shown by the dashed line position in Figure 12 ), are wrapped in the mirror tube 20, that is, the internal arrangement is realized, and the occupied space is reduced. At the same time, the background setting of adjusting the angle of the camera belongs to the prior art, and the operating principle is not described here.

Claims

1. An off-center endoscope, characterized by: The utility model relates to a surgical instrument, which comprises a lens assembly, a sleeve assembly and a handle assembly, the lens assembly comprises a lens part (2) and a lens tube (20) connected with the lens part (2), the sleeve assembly comprises a main channel and at least one water injection channel, the lens tube (20) is eccentrically arranged in the main channel, an adjusting mechanism for adjusting the rotation of the lens tube (20) is arranged on the handle assembly, one end of the sleeve assembly is provided with a rotary support hole (171) for supporting the lens tube (20), and the other end of the sleeve assembly is connected with the handle assembly; during use, the adjusting mechanism drives the lens tube to rotate and synchronously drives the lens part (2) to rotate, so as to leave a channel space for the surgical instrument to extend into the position of the main channel.

2. An off-center endoscope as claimed in claim 1, characterized in that: The water injection channel comprises a water injection pipe (11), the handle assembly comprises a handle (1) in which the water injection pipe (11) is inserted and a support pipe assembly which is sleeved with the handle (1) and is in communication with the water injection pipe (11), the support pipe assembly comprises a front fixed seat (10) sleeved in the handle (1) and a fixed sleeve (101) sleeved with the front fixed seat (10), an outer pipe (12) is arranged on the front fixed seat (10), a rear support seat (13) is arranged in the fixed sleeve (101), and a water containing cavity (14) in communication with the water injection pipe (11) is formed between the inner walls of the front fixed seat (10), the rear support seat (13) and the fixed sleeve (101).

3. An off-center endoscope as claimed in claim 2, characterized in that: The main channel comprises a front support pipe (121) inserted in the outer pipe (12), a front support seat (15) and a drain pipe (16) sequentially arranged through the front support pipe (121) and the front support seat (15), the sleeve assembly comprises a guide sleeve (17) arranged in communication at one end of the front support pipe (121), a notch is arranged on one side of the guide sleeve (17), the other side is provided with a rotary support hole (171) in communication with the notch, a mounting hole (151) in communication along the axial direction of the front support seat (15) is arranged on the pipe wall of the front support seat (15) at a position corresponding to the rotary support hole (171), and the lens tube (20) connected with the lens part (2) is arranged in the rotary support hole (171), the non-connected end of the lens tube (20) sequentially passes through the mounting hole (151) and the rear support seat (13) and is arranged out of the handle (1).

4. An off-centre endoscope according to claim 3, wherein: A first through hole (131) for the lens tube (20) is arranged on the rear support seat (13), and the lens tube (20) is arranged in a slanting manner with the front low and the rear high between the rear support seat (13) and the front support pipe (121); a second through hole (132) for the drain pipe (16) and a third through hole (133) fixedly connected with the insertion end of the water injection pipe (11) are further arranged on the rear support seat (13).

5. An off-center endoscope as claimed in claim 3, characterized in that: A water outlet sleeve (3) is arranged in the handle (1) corresponding to the position where the drain pipe (16) passes through one end of the rear support seat (13), a connecting hole (30) is arranged at one end of the water outlet sleeve (3) and is sleeved with the drain pipe (16), a tapered hole (32) is arranged at the other end and is communicated, a water pumping pipe (31) is arranged on the water outlet sleeve (3) and is communicated with the tapered hole (32), an installation sleeve (18) is arranged on the handle (1) corresponding to the position of the water outlet sleeve (3), and the water outlet sleeve (3) is sleeved and fixed on the installation sleeve (18); an instrument hole (181) is arranged on the installation sleeve (18), a sealing support frame (19) is embedded in the tapered hole (32), and a sealing support hole (191) is arranged on the sealing support frame (19) and is communicated with the tapered hole (32) and the instrument hole (181).

6. An off-center endoscope as claimed in claim 3, characterized in that: A water passing cavity (161) communicated with the water containing cavity (14) is formed between the outer side wall of the drain pipe (16) and the inner side wall of the front support pipe (121), and a water outlet hole (162) communicated with the water passing cavity (161) is arranged on the front support pipe (121) adjacent to the guide sleeve (17).

7. An off-center endoscope as claimed in claim 3, characterized in that: The lens part (2) is located at the notch position on the guide sleeve (17), the outer side wall of the lens part (2) is a circular arc surface structure, and a gap inclined surface (172) is arranged on the inner side wall of the notch.

8. An off-center endoscope as claimed in claim 2, characterized in that: An opening is arranged on the handle (1), the adjusting mechanism comprises a dial gear (4) arranged in the opening, an insertion hole (40) is arranged on the inner side wall of one side of the opening, a connecting pin (41) is arranged on the dial gear (4), a fixing cylinder (134) is arranged on the rear support seat (13), the fixing cylinder (134) is sleeved with one end of the connecting pin (41), the other end of the connecting pin (41) is inserted and connected with the insertion hole (40), and a driven gear (21) is sleeved on the mirror tube (20) corresponding to the position of the dial gear (4).

9. An off-centre endoscope according to claim 8, wherein: A sensing device is further arranged in the handle (1) corresponding to the position of the dial gear (4), the sensing device comprises an induction rod (5) inserted on the side wall of the dial gear (4), a proximity switch (50) is arranged on the inner side wall of the handle (1) corresponding to the position of the induction rod (5), and the proximity switch (50) is wirelessly connected with a PLC controller.

10. An off-center endoscope as claimed in claim 4, characterized in that: A front fixing pipe (51) and a rear fixing pipe (52) are embedded in the first through hole (131), a groove structure is formed between the two fixing pipes and the hole wall of the first through hole (131), a sealing ring (53) is arranged in the groove structure, and the mirror tube (20) passes through the front fixing pipe (51), the sealing ring (53) and the rear fixing pipe (52) in sequence from front to back.

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