CN207236761U - Endoscopic procedure handwheel handle locking mechanism - Google Patents

Abstract

The utility model discloses a kind of endoscopic procedure handwheel handle locking mechanism, cover small axis spiral cover admittedly in small shaft, left-right rotation handwheel is set with small axis spiral cover, friction pad is set in the inner cavity of small axis spiral cover, spring and pressing plate are set gradually in friction pad from the bottom up, the top of pressing plate sets inner cover, cam is fixedly installed in the bottom of inner cover, the bottom of the drive block of cam is step-like, the bottom of drive block has low order face, middle terrace and high terrace, middle terrace or the high-order face pressure of drive block is compeled on pressing plate, in the external tooth that the top of interior cover outer wall is equipped with, the external tooth is mutually engaged with the teeth groove on spanner set inner wall.The utility model firmly can still rotate left-right rotation handwheel after being capable of providing effective coupling mechanism force and locking；Turning moment is transmitted reliable；Can utilize small operating force than ever by do not have it is devious in a manner of be securely fixed the turned position of bending operation knob；The operating force of required rotation left-right rotation handwheel is small under releasing orientation, and handwheel is lightly flexible.

Description

Endoscopic procedure handwheel handle locking mechanism

Technical field

The utility model belongs to the field of medical instrument technology, specifically, more particularly to a kind of endoscopic procedure handwheel hand Handle retaining mechanism.

Background technology

Medical stomach endoscopic procedure handle is furnished with bent angle handwheel, for manipulating the flexure operation of endoscope head end, doctor Shield personnel can keep the angle of bend of endoscope head end by handwheel retaining mechanism, so that doctor preferably observes, at the same time Also require in the locked condition medical staff still can rotate handwheel.

At present, the handwheel retaining mechanism that bends right and left in domestic most stomach endoscope products is rubbed using sheet metal clamping The frictional force needed when wiping the mode of component to provide locking.Disclosed in Japan's Unexamined Patent 10-286220 publications In structure, due to using the structure for making its elastic deformation by movable member and fixed component clamping friction component, so, rub Wipe component easily to deteriorate with multiple elastic deformation, there are the following problems for its result：After a number of uses, friction means are opposite In the frictional force of the inner peripheral surface of bending operation knob reduces, i.e. the frictional force of friction means produces deviation.Also, in order to make friction Component elasticity deforms, it is necessary to using larger power by fixed component and movable member clamping friction component, so, there are necessary The problem of securing rod for rotating movable member or hook knob being rotated using larger power.

The existing handwheel retaining mechanism that bends right and left is as shown in Figure 1,1 being inner cover, 2 being spanner set, 3 be pressing plate, 4 being bullet Spring, 5 be handle main shaft, 6 be small shaft, 7 be small axis spiral cover, 8 be left-right rotation handwheel, 16 be plastic mattress, 17 be check plate. Connected between spanner set 2 and inner cover 1 by two or three limit screws, limit screw is stuck in the annular protrusion of inner cover. Inner cover 1 is connected with handle main shaft 5 by screw thread pair, and the rotary motion of inner cover 1 is convertible into up and down motion vertically, so as to squeeze Pressure or release pressing plate 3.Pressing plate 3 is pressed down against compressible plastic pad 16, while spring 4 exerts a force check plate 17, it is transported upwards The dynamic frictional force that so as to extrude plastic mattress 16, thus generation obstruction left-right rotation handwheel 8 rotates.Check plate 17 is started with left/right rotation Wheel 8 rotates at the same time, and pressing plate 3 is limited and cannot be rotated by handle main shaft 5.During rotating spanner set unlocks, inner cover 1 Movement upwards, inner cover 1 reduces the pressure of pressing plate 3 while the elastic force that spring 4 is accumulated reduces, therefore pressing plate 3 and check plate 17 The frictional force that plastic mattress 16 is compressed and produced is gradually reduced.However, in the process, with the upward movement of pressing plate 3, spring 4 recover deformation at the same time, can also extrude check plate 17 and move upwards, and pressing plate 3, plastic mattress 16, check plate 17 still have contact, therefore meeting There is the presence of remaining frictional force, so as to influence flexibility and the lightness of hand wheel rotating.In addition it is to rely on during locking Pressing plate 3 and check plate 17 realize locking effect, after a number of uses, inner cover to the frictional force for compressing generation of plastic mattress 16 1 move downward apart from it is certain when, frictional force between plastic mattress 16 and pressing plate 3, check plate 17 reduces, i.e. plastic mattress 16 Frictional force produces deviation.Also, in order to make plastic mattress 16 produce elastic deformation, it is necessary to pass through 17 He of check plate using larger power Pressing plate 3 clamps plastic mattress 16, and is realized pair by screw thread pair conversion of motion into being axially moved between inner cover 1 and handle main shaft 5 The compression or release of plastic mattress 16, so, there is the problem of larger power must be utilized to rotate the spanner set 2 for rotating inner cover 1. Meanwhile inner cover 1 and the assembling of handle main shaft 5 complete after frictional force it is related with assembling experience, the index that does not quantify instructs Assembling.Connection mode between inner cover 1 and spanner set 2 is also unreliable, in rotation process, is easily produced between spanner set and inner cover It is opposite to slide.

Utility model content

In view of the drawbacks described above of the prior art, the technical problem to be solved by the utility model is to provide peeped in one kind Mirror manipulator's wheel handle retaining mechanism.

The technical solution of the utility model is as follows：A kind of endoscopic procedure handwheel handle locking mechanism, including inner cover, spanner Set, pressing plate, spring, handle main shaft, small shaft, small axis spiral cover and left-right rotation handwheel, the small shaft are rotationally set in On handle main shaft, cover small axis spiral cover admittedly in small shaft, left-right rotation handwheel be set with small axis spiral cover, it is characterised in that：Institute State and friction pad is set in the inner cavity of small axis spiral cover, friction pad is supported by the step surface in small axis spiral cover inner cavity, in the friction pad In set gradually spring and pressing plate from the bottom up, the top of pressing plate sets inner cover, the inner cover can original place be rotationally set in hand On handle main shaft, cam is fixedly installed in the bottom of inner cover, which is made of torus and drive block, is set in the bottom surface of torus At least two drive blocks being distributed by even circumferential are put, which is arc-shaped, and the bottom of drive block is step-like, driving The bottom of block has low order face, middle terrace and high terrace, and the lowermost of the drive block is always positioned in the arcuate socket on pressing plate, Middle terrace or the high-order face pressure of drive block is compeled on pressing plate, and in the external tooth that the top of the interior cover outer wall is equipped with, the external tooth is with pulling Teeth groove on gloves inner wall is mutually engaged.

Using above technical scheme, inner cover can in the circumferential rotate but will not produce displacement on axial.On interior cover outer wall The external tooth in portion is mutually engaged with the teeth groove on spanner set inner wall, when rotary spanner covers, can drive inner cover and cam together Rotate, when the high-order face pressure of cam rotation to drive block compels the upper face of pressing plate, pressing plate is depressed friction pad, friction pad with it is small Locking is realized in the engagement of axis spiral cover, when the scala media face pressure of cam rotation to drive block compels the upper face of pressing plate, under the action of the spring Pressing plate resets upwards, friction pad is separated realization unlock with small axis spiral cover.Compared with traditional screw thread transmits way of torque, inner cover Coordinated by the way of occlusion with spanner set, and using the lift characteristics driving pressing plate of cam, the good reliability of transmission, is being transmitted Be not in the phenomenon of skidding during moment of torsion, and operate more laborsaving.Spring is in same layer with friction pad, is unclamping State when, spring completely can separate pressing plate and friction pad, avoid the presence of remaining frictional force so that releasing orientation When, the operating force of left rotation and right rotation handwheel is small, and the lightness of hand wheel rotating and flexibility are good.

The friction pad is composed of upper strata pad and lower floor's pad, and the side inner wall and side outer wall of upper strata pad are equal For circular conical surface, and the side outer wall of upper strata pad is adapted with the conical surface inner wall of small axis spiral cover inner cavity, and lower floor's pad is circle Ring-type, the internal diameter of lower floor's pad are less than the internal diameter at upper strata pad minimum.The hardness of friction pad upper strata pad is moderate, its natural shape Stable shape can be kept during state, in compressive state can the amount of being deformed and contacted with the conical surface inner wall of small axis spiral cover.Pressure During plate malcompression friction pad, the side outer wall of the upper strata pad of friction pad and the conical surface inner wall of small axis spiral cover have certain interval, this When friction pad can be rotated together with small axis spiral cover；When friction pad is compressed by pressing plate, upper strata pad can the amount of being deformed and Contacted with the conical surface inner wall of small axis spiral cover, while pressure is produced between lower floor's pad and the step surface of small axis spiral cover inner cavity.Firmly Left-right rotation handwheel is rotated, friction pad upper strata pad can be relatively rotated with small axis spiral cover conical surface inner wall, but with the presence of frictional force Hinder the rotation of small axis spiral cover；Meanwhile there is also hinder small axis between friction pad lower floor pad and small axis spiral cover inner cavity step surface The frictional force that spiral cover rotates.Will for locking effect of the frictional force to left-right rotation handwheel is compared with background technology at above-mentioned two It is reliable many.

Even closer in order to be engaged when compressing friction pad with small axis spiral cover, the side outer wall of lower floor's pad is circular cone Face, and the side outer wall of the side outer wall of lower floor's pad and upper strata pad is located on same circular conical surface.

It is more reliable and more stable to friction pad locking effect in order to realize, it is provided with the upper surface of lower floor's pad along circle All equally distributed first end face teeth, the bottom surface of the pressing plate is provided with the second end face that can be mutually engaged with first end face tooth Tooth.

Preferably, the hardness of lower floor's pad is more than the hardness of upper strata pad, lower floor's pad is by resin or modeling Material or metal material are made, and the upper strata pad is made of rubber or plastics.

Upper groove and lower groove are provided with the inner cover, is connected between upper groove and lower groove by step-like via Logical, the inner cover is placed on handle main shaft by via, and is supported by fixed cylinder, and inner cover is spacing by limiting plate upwards, described Limiting plate is by nut check on handle main shaft.The upper groove of above structure one side inner cover is used to house limiting plate and nut, The lower groove of inner cover is used for the torus for being embedded in cam, and such inner cover is tightly combined with periphery member, can ensure that hand-wheel locking mechanism It is compact-sized；On the other hand, axial displacement will not occur for inner cover, and the flexibility circumferentially rotated is good.

In order to prevent spanner set from coming off, direction of the external tooth from free end toward root gradually increases, the lower surface of external tooth For inclined-plane, multiple limit screws are radially equipped with spanner set, the limit screw is stuck on the inclined-plane of external tooth.

Multiple circular holes being distributed by even circumferential are provided with the torus of the cam, trip bolt is through circular hole and stretches Enter on inner cover in corresponding screw hole, cam is fixed together with inner cover.Behaviour is dismounted between above structure inner cover and cam Work is very convenient, and the fixing connected is good.

In the inner cover lower groove cam torus outer rim is caught in equipped with multiple convex blocks by even circumferential distribution, the convex block On in the notch that is correspondingly arranged, can so prevent cam from relatively rotating with inner cover.

In order to avoid card resistance occurs in operation, the number of the drive block is three, the low order of drive block bottom Face and high terrace pass through chamfered transition each parallel to middle terrace between middle terrace and high terrace.

Beneficial effect：The utility model firmly can still rotate left and right after being capable of providing effective coupling mechanism force and locking Rotate handwheel；It is easy to assembly and have quantization instruct；Turning moment is transmitted reliable；Operating force small than ever can be utilized not have The mode of deviation is securely fixed the turned position of bending operation knob；The required behaviour for rotating left-right rotation handwheel under releasing orientation It is small to make power, handwheel is lightly flexible.

Brief description of the drawings

Fig. 1 is the structure diagram of background technology.

Fig. 2 is the structure diagram of the utility model.

Fig. 3 is the structure decomposition figure of the utility model.

Fig. 4 is the scheme of installation of inner cover and cam.

Fig. 5 is the structure diagram for making inner cover.

Fig. 6 is the stereogram of inner cover.

Fig. 7 is the structure diagram of cam.

Fig. 8 is that inner cover is engaged schematic diagram with what spanner covered.

Fig. 9 is the assembling schematic diagram of inner cover.

Figure 10 is the structure diagram of friction pad.

Figure 11 is the release schematic diagram of friction pad.

Figure 12 is the locking schematic diagram of friction pad.

Embodiment

The utility model is described in further detail with reference to the accompanying drawings and examples：

As shown in Figure 2 and Figure 3, small shaft 6 is rotationally set on handle main shaft 5, covers small axis rotation admittedly in small shaft 6 Lid 7, left-right rotation handwheel 8, the tooth between left-right rotation handwheel 8 and small axis spiral cover 7 by being mutually twisted are set with small axis spiral cover 7 It is engaged.Handle main shaft 5, small shaft 6, the set-up mode of small axis spiral cover 7 and left-right rotation handwheel 8 are same as the prior art, This is not repeated.

As shown in Fig. 2, Fig. 3, Figure 10, Figure 11 and Figure 12, friction pad 9, friction pad 9 are set in the inner cavity of small axis spiral cover 7 Supported by the step surface in small 7 inner cavity of axis spiral cover, and by the small annular protrusion radial positioning on step surface.Friction pad 9 is by upper strata Pad 9a and lower floor pad 9b are composed, and the side inner wall and side outer wall of upper strata pad 9a are circular conical surface, and upper strata is padded The side outer wall of body 9a is adapted with the conical surface inner wall of small 7 inner cavity of axis spiral cover.Lower floor pad 9b is annular shape, lower floor pad 9b's Internal diameter is less than the internal diameter at upper strata pad 9a minimums.The side outer wall of lower floor pad 9b is circular conical surface, and the week of lower floor pad 9b The side outer wall of side outer wall and upper strata pad 9a are preferably placed on same circular conical surface.It is of course also possible to the week by lower floor pad 9b Side outer wall and the side outer wall of upper strata pad 9a stagger, and only disclosure satisfy that functional requirement.

As shown in Fig. 2, Fig. 3, Figure 10, Figure 11 and Figure 12, it is provided with the upper surface of lower floor pad 9b and circumferentially uniformly divides The first end face tooth 9c of cloth.The hardness of lower floor pad 9b is more than the hardness of upper strata pad 9a, and lower floor pad 9b is by resin or plastics Or other nonmetallic materials or metal material are made, upper strata pad 9a is by the relatively large rubber of frictional force or plastics or other classes As material be made, upper strata pad 9a and lower floor pad 9b can be combined together by encapsulated technique, upper strata pad 9a and lower floor Pad 9b can also use the similar structure of other principles.

As shown in Fig. 2, Fig. 3, Fig. 4, Figure 11, Figure 12, spring 4 and pressing plate 3 are sequentially placed from the bottom up in friction pad 9, Spring 4 is supported by the step surface in small 7 inner cavity of axis spiral cover, and pressing plate 3 is located in the upper strata pad 9a of friction pad 9, and pressing plate 3 is by bullet Spring 4 supports, and the bottom surface of pressing plate 3 is provided with the second end face tooth that can be mutually engaged with first end face tooth.The moulding of spring 4 with it is existing Technology is identical, and this will not be repeated here.Inner cover 1 is set in the top of pressing plate 3, inner cover 1 is preferably made of aluminium.Certainly, as equivalent Replacement, inner cover 1 can also use other suitable materials.Upper groove 1a and lower groove 1b, fovea superior are provided with inner cover 1 Connected between groove 1a and lower groove 1b by the via 1c opened up along 1 axial line of inner cover, via 1c is up-small and down-big two-part Stepped hole.

As shown in Fig. 2, Fig. 3, Fig. 4, Fig. 5, Fig. 6, Fig. 7, Fig. 8, Fig. 9, inner cover 1 is placed in handle main shaft 5 by via 1c On, and the fixed cylinder 11 by being covered admittedly on handle main shaft 5 supports, inner cover 1 is spacing by limiting plate 12 upwards, and limiting plate 12 is by nut 13 It is locked on handle main shaft 5, limiting plate 12 and nut 13 are respectively positioned in upper groove 1a.Cam is fixedly installed in the bottom of inner cover 1 10, which is made of torus 10a and drive block 10b.Multiple circles being distributed by even circumferential are provided with torus 10a Hole, the number of circular hole is definite according to being actually needed, and the present embodiment is preferably three.Also it is provided with the outer rim of torus 10a multiple The notch 10g being distributed by even circumferential, notch is preferably also three, and notch is preferably rectangular.The torus 10a of cam 10 is embedding In the lower groove 1b for entering inner cover 1, trip bolt 15 is through circular hole on torus 10a and stretches on inner cover 1 screw hole being correspondingly arranged In, cam 10 is fixed together with inner cover 1.Equipped with multiple convex blocks by even circumferential distribution in 1 lower groove 1b of inner cover 1e, convex block 1e are caught in the notch 10g being correspondingly arranged in cam torus outer rim, to prevent cam 10 and inner cover 1 from occurring relatively Rotate.

As shown in Fig. 2, Fig. 3, Fig. 4, Fig. 7, in the bottom surface of torus 10a, fixed setting at least two is distributed by even circumferential Drive block 10b, the number of drive block 10b is preferably three.Drive block 10b is arc-shaped, and the bottom of drive block 10b is platform Scalariform, and the bottom of drive block 10b has low order face 10c, middle terrace 10d and high terrace 10e.Low order face 10c and high terrace 10e Each parallel to middle terrace 10d, pass through inclined-plane 10f transition between middle terrace 10d and high terrace 10e.The lowermost of drive block 10b It is always positioned on pressing plate 3 in the corresponding arcuate socket opened up, the middle terrace 10d or high terraces 10e of drive block 10b is oppressed in pressing plate 3 On.

As shown in Fig. 2, Fig. 3, Fig. 4, Fig. 9, circumferentially equally distributed external tooth has been formed integrally with the top portion in 1 outer wall of inner cover 1d.The number of external tooth 1d is definite according to being actually needed, and directions of the external tooth 1d from free end toward root gradually increases, under external tooth 1d Surface is inclined-plane.Spanner set 2 is set in the top of inner cover 1, and external tooth 1d and the spanner on 1 outer wall top of inner cover cover the tooth on 2 inner walls Groove is mutually engaged, and multiple limit screws 4 being distributed by even circumferential are radially equipped with spanner set 2, and limit screw 4 is stuck in external tooth On the inclined-plane of 1d, spanner set 2 can be prevented to come off.

The operation principle of the utility model is as follows：

Spanner set 2 is connected with inner cover 1 by the tooth-shape structure being mutually twisted, and this kind of drive for transmitting moment of torsion is compared with Fig. 1 It is middle to be threadedly coupled relatively reliable for the mode for transmitting moment of torsion, be not in the phenomenon of skidding during moment of torsion is transmitted.When When rotary spanner set 2, inner cover 1 and cam 10 can be driven to rotate together, cam 10 turns to the high terrace of drive block 10b 10e oppress pressing plate 3 upper face when, pressing plate 3 is depressed friction pad 9, friction pad 9 engage with small axis spiral cover 7 realize lock (see Figure 12), when cam 10 turns to the upper face of middle terrace 10d compressing pressing plates 3 of drive block 10b, the pressing plate under the action of spring 4 3 reset upwards, friction pad 9 is separated realization unlock with small axis spiral cover 7 (see Figure 11).It is specific as follows：

During 3 malcompression friction pad 9 of pressing plate, the side outer wall of the upper strata pad 9a of friction pad 9 and the conical surface of small axis spiral cover 7 Inner wall has certain interval, and friction pad can rotate together with small axis spiral cover 7 at this time；When friction pad is compressed by pressing plate 3, pressing plate The second end face tooth of 3 lower faces is engaged with the first end face tooth 9c on friction pad, upper strata pad 9a can the amount of being deformed and with it is small The conical surface inner wall contact of axis spiral cover 7, while produce pressure between lower floor pad 9b and the step surface of small 7 inner cavity of axis spiral cover.Firmly Left-right rotation handwheel 8 is rotated, friction pad upper strata pad 9a can be relatively rotated with small 7 conical surface inner wall of axis spiral cover, but have frictional force In the presence of the rotation for hindering small axis spiral cover 7；Meanwhile between 7 inner cavity step surface of friction pad lower floor pad 9b and small axis spiral cover there is also The frictional force for hindering small axis spiral cover 7 to rotate.Locking effect of the frictional force to left-right rotation handwheel 8 very may be used at above-mentioned two Lean on.Spring 4 is in same layer with friction pad, and in the state of release, spring 4 completely can separate pressing plate 3 and friction pad, keep away Exempted from the presence of remaining frictional force so that during releasing orientation, the operating force of left rotation and right rotation handwheel is small, the lightness of hand wheel rotating and Flexibility is good.

The preferred embodiment of the utility model described in detail above.It should be appreciated that the ordinary skill people of this area Member according to the present utility model can conceive without creative work makes many modifications and variations.Therefore, all this technology necks Technical staff passes through logic analysis, reasoning or limited reality on the basis of existing technology according to the design of the utility model in domain Available technical solution is tested, all should be in the protection domain being defined in the patent claims.

Claims (10)

1. a kind of endoscopic procedure handwheel handle locking mechanism, including inner cover (1), spanner set (2), pressing plate (3), spring (4), hand Handle main shaft (5), small shaft (6), small axis spiral cover (7) and left-right rotation handwheel (8), the small shaft (6) are rotationally set in On handle main shaft (5), cover small axis spiral cover (7) admittedly in small shaft (6), left-right rotation handwheel (8) be set with small axis spiral cover (7), It is characterized in that：Friction pad (9) is set in the inner cavity of the small axis spiral cover (7), and friction pad (9) is by small axis spiral cover (7) inner cavity In step surface support, set gradually spring (4) and pressing plate (3) from the bottom up in the friction pad (9), pressing plate (3) it is upper Side set inner cover (1), the inner cover (1) can original place be rotationally set on handle main shaft (5), fixed in the bottom of inner cover (1) Cam (10) is set, which is made of torus (10a) and drive block (10b), is set in the bottom surface of torus (10a) At least two by even circumferential distribution drive blocks (10b), the drive block (10b) is arc-shaped, and the bottom of drive block (10b) To be step-like, the bottom of drive block (10b) has low order face (10c), middle terrace (10d) and high terrace (10e), the drive block The lowermost of (10b) is always positioned in the arcuate socket on pressing plate (3), the middle terrace (10d) of drive block (10b) or high terrace (10e) is oppressed on pressing plate (3), in the external tooth (1d) that the top of the inner cover (1) outer wall is equipped with, the external tooth (1d) and spanner set (2) teeth groove on inner wall is mutually engaged.

2. endoscopic procedure handwheel handle locking mechanism as claimed in claim 1, it is characterised in that：The friction pad (9) by Upper strata pad (9a) and lower floor's pad (9b) are composed, and the side inner wall and side outer wall of upper strata pad (9a) are circular cone Face, and the side outer wall of upper strata pad (9a) is adapted with the conical surface inner wall of small axis spiral cover (7) inner cavity, lower floor's pad (9b) For annular shape, the internal diameter of lower floor's pad (9b) is less than the internal diameter at upper strata pad (9a) minimum.

3. endoscopic procedure handwheel handle locking mechanism as claimed in claim 2, it is characterised in that：Lower floor's pad (9b) Side outer wall be circular conical surface, and the side outer wall of the side outer wall of lower floor's pad (9b) and upper strata pad (9a) is located at same circle On the conical surface.

4. endoscopic procedure handwheel handle locking mechanism as claimed in claim 2 or claim 3, it is characterised in that：Padded in the lower floor The upper surface of body (9b) is provided with circumferentially equally distributed first end face tooth (9c), and the bottom surface of the pressing plate (3) is provided with energy Enough second end face teeth being mutually engaged with first end face tooth (9c).

5. endoscopic procedure handwheel handle locking mechanism as claimed in claim 4, it is characterised in that：It is characterized in that：It is described The hardness of lower floor's pad (9b) is more than the hardness of upper strata pad (9a), and lower floor's pad (9b) is by resin or plastics or metal material Material is made, and the upper strata pad (9a) is made of rubber or plastics.

6. the endoscopic procedure handwheel handle locking mechanism as described in claim 1 or 2 or 3 or 5, it is characterised in that：Described Upper groove (1a) and lower groove (1b) are provided with inner cover (1), by step-like between upper groove (1a) and lower groove (1b) Via (1c) connects, and the inner cover (1) is placed on handle main shaft (5) by via (1c), and is supported by fixed cylinder (11), interior Cover (1) is spacing by limiting plate (12) upwards, and the limiting plate (12) is locked on handle main shaft (5) by nut (13).

7. endoscopic procedure handwheel handle locking mechanism as claimed in claim 6, it is characterised in that：The external tooth (1d) is from outstanding The direction of dead end toward root gradually increases, and the lower surface of external tooth (1d) is inclined-plane, is radially equipped with spanner set (2) multiple Limit screw (14), the limit screw (14) are stuck on the inclined-plane of external tooth (1d).

8. endoscopic procedure handwheel handle locking mechanism as claimed in claim 6, it is characterised in that：In the cam (10) Multiple circular holes being distributed by even circumferential are provided with torus (10a), trip bolt (15) is through circular hole and stretches on inner cover (1) In corresponding screw hole, cam (10) is set to be fixed together with inner cover (1).

9. endoscopic procedure handwheel handle locking mechanism as claimed in claim 7 or 8, it is characterised in that：Under the inner cover (1) In groove (1b) cam torus (10a) outer rim is caught in equipped with multiple convex blocks (1e) by even circumferential distribution, the convex block (1e) On in the notch (10g) that is correspondingly arranged.

10. endoscopic procedure handwheel handle locking mechanism as claimed in claim 9, it is characterised in that：The drive block (10b) Number be three, the low order face (10c) of drive block (10b) bottom and high terrace (10e) each parallel to middle terrace (10d), in Pass through inclined-plane (10f) transition between terrace (10d) and high terrace (10e).