Rotating wheel locking mechanism and endoscope

Abstract

The utility model provides a rotating wheel locking mechanism and an endoscope, relates to the technical field of endoscopes, and solves the problem of unreliable locking effect of a hand wheel in the prior art. The rotating wheel locking mechanism is used in the endoscope. In the rotating wheel locking mechanism, a rotating wheel is provided with a contact part, and one end of a wheel shaft is fixedly connected with the rotating wheel and can synchronously rotate with the rotating wheel; the displacement piece is arranged on one side of the rotating wheel in a rotation stopping manner relative to the rotating wheel, is provided with a locking part and can move relative to the rotating wheel to be close to or away from the contact part; when the displacement piece gets close to the rotating wheel, the locking part can be meshed with the contact part to anchor the rotating wheel in a circumferential abutting mode. The rotating wheel and the displacement piece are connected in a tooth groove meshing mode, the rotating wheel is anchored by the displacement piece arranged in a rotation stopping mode through the circumferential abutting relation, and compared with the mode that the rotating wheel is anchored in the mode that damping is directly provided through a spring, the locking effect is more reliable, the rotating wheel is not prone to slipping and shaking due to abrasion, and the service life of the rotating wheel is prolonged. And the effective service life can be ensured sufficiently.

Description

Technical Field

[0001] The utility model relates to the technical field of endoscopes, in particular to a rotating wheel locking mechanism and an endoscope. Background Art

[0002] The working principle of existing endoscopes is to insert the insertion part into the human body through the natural or artificially constructed cavity for inspection or treatment. After the endoscope is inserted into the human body, it is necessary to use the lens and light source system to observe the internal situation, or to introduce liquid (such as saline) for washing through the instrument channel, or to absorb liquid and tissue samples through the suction device.

[0003] To achieve the above functions, it is necessary to ensure that the front-end component on the insertion part can continuously and accurately point to the target area. To ensure that the front-end component points continuously and accurately, it is necessary to rely on manual rotation of the handwheel installed on the operating part to drive the traction wheel to rotate, and then pull the front-end component of the insertion part through the traction rope connected to the traction wheel, and then adjust the direction of the front-end component to the right position. After it is in place, it is necessary to lock the traction wheel and handwheel to stabilize the direction of the front-end component to ensure that the corresponding function is completed as scheduled.

[0004] However, in the related art, a handwheel locking mechanism is often formed by arranging a spring between the handwheel and the housing of the operating part, and the spring directly acts on the handwheel to generate a certain friction resistance to prevent the handwheel from being easily rotated, so as to achieve the purpose of locking the handwheel and the traction wheel. However, this handwheel locking mechanism is easy to wear and has a short effective life, which makes the handwheel easy to slip and shake, and there is a problem of unreliable locking effect. Utility Model Content

[0005] The utility model aims to design a rotary wheel locking mechanism and an endoscope, so as to solve the problem that the locking effect of the hand wheel is unreliable.

[0006] The utility model is realized by the following technical solutions:

[0007] The utility model provides a rotating wheel locking mechanism applied to an endoscope, the rotating wheel locking mechanism comprises a rotating wheel, a wheel shaft and a displacement member; the rotating wheel is provided with a contact portion; one end of the wheel shaft is fixedly connected to the rotating wheel and can rotate synchronously with the rotating wheel, and the other end is used to connect a traction wheel; the displacement member is arranged at one side of the rotating wheel to stop rotation relative to the rotating wheel, the displacement member is provided with a locking portion and can be displaced relative to the rotating wheel to approach or move away from the contact portion; wherein one of the contact portion and the locking portion is arranged as a tooth, and the other is arranged as a groove, and when the displacement member approaches the rotating wheel, the locking portion can mesh with the contact portion and circumferentially abut against each other to anchor the rotating wheel.

[0008] When the above-mentioned setting structure is adopted, in the rotating wheel locking mechanism, when the rotating wheel and the displacement member are in contact with each other, the contact part and the locking part respectively arranged thereon are connected in the form of tooth groove meshing, and the displacement member arranged to prevent rotation anchors the rotating wheel through the circumferential abutment relationship to prevent the rotating wheel from being easily rotated. It can be seen that the rotating wheel locking mechanism abandons the method of directly providing damping by the spring to anchor the rotating wheel, so that the locking effect of the displacement member on the rotating wheel is more reliable, and it is not easy to cause wear on the contact surface to cause the rotating wheel to slip and shake, and the effective life can also be sufficiently guaranteed.

[0009] In order to better realize the present utility model, the following setting structure is particularly adopted: the rotary wheel locking mechanism also includes a rotatable rotary driving member; the rotary driving member is provided with a hand-held portion for a person to grasp to rotate the rotary driving member, and the rotary driving member is axially arranged opposite to the displacement member and constitutes an end face cam mechanism.

[0010] When the above-mentioned arrangement structure is adopted, the rotary driving member can be rotated by the handheld part to convert the rotary motion into the displacement motion of the displacement member to lock the rotating wheel, and the locking operation can be performed more conveniently.

[0011] In order to further better realize the present utility model, the following setting structure is particularly adopted: the rotary driving member includes a rotating sleeve and an end cam disc coaxially sleeved on the wheel axle; the rotating sleeve can rotate around the wheel axle and is connected to the hand-held part, and an annular cavity with an opening at one end facing the contact part is provided in the rotating sleeve, wherein the displacement member is arranged in the annular cavity, and the locking part is axially opposite to the contact part through the opening; the end cam disc is arranged in the annular cavity and can rotate synchronously with the rotating sleeve, wherein the displacement member axially abuts against the cam surface of the end cam disc.

[0012] When the above-mentioned setting structure is adopted, the rotary drive component integrates the end cam plate and the displacement component cooperating with the end cam plate in an annular cavity as a component, and is arranged coaxially with the wheel axle, which can further reduce the difficulty of locking the rotating wheel and simplify the mechanism structure.

[0013] In order to further better realize the present utility model, the following setting structure is particularly adopted: a spring is arranged in the annular cavity, one end of the spring abuts against the wall of the annular cavity, and the other end abuts against the displacement member to press it against the cam surface of the end face cam disk; when the locking portion is disengaged from the contact portion, the displacement member is located in the near rest section of the cam surface of the end face cam disk, and when the locking portion is engaged with the contact portion, the displacement member is located in the far rest section of the cam surface of the end face cam disk.

[0014] When the above-mentioned structure is adopted, the displacement member is pressed against the end cam disc by a spring, so that the displacement action of the displacement member will not be affected by the posture of the endoscope, and the displacement member can be accurately and cleanly engaged or disengaged with the rotating wheel, which has good operability. At the same time, when the spring is introduced, the spring is not installed between the rotating wheel and the displacement member, so that the risk of spring wear is very low, and the effective life of the rotating wheel locking mechanism can be guaranteed. At the same time, when the locking part is engaged with the contact part, the displacement member is located at the far rest section of the cam surface of the end cam disc, and with the help of the spring, the displacement member can be locked with the rotating wheel and positioned, without the need to maintain it by hand all the time, which can conveniently free up hands for other work.

[0015] In order to further better realize the present invention, the following setting structure is particularly adopted: the displacement member includes a locking plate and a pressure plate axially abutted against each other, one end of the locking portion is provided with the locking portion and abuts against the other end of the spring, the other end of the locking portion is pressed against one end of the pressure plate through the spring to press the pressure plate against the cam surface of the end face cam plate, and the pressure plate is non-rotatably arranged in the annular cavity; wherein the contact portion and the locking portion are arranged to be a structure that can guide each other through circumferential surfaces to be axially aligned during the meshing process.

[0016] When the above-mentioned setting structure is adopted, the displacement member is a component formed by the locking disk and the pressure disk being axially pressed against each other under the action of the spring. In this way, under normal circumstances, the locking disk and the pressure disk are anti-rotation bodies that do not rotate relative to each other, which can ensure that the locking disk can be moved to the rotating wheel, and the rotating wheel can be reliably locked by the engagement of the locking portion and the contact portion. Since the contact portion and the locking portion can guide each other to axially align during the engagement process, in some cases, when the locking portion and the contact portion have a certain amount of axial misalignment, and when the rotating wheel is stabilized, the contact portion will apply a tangential force to the locking portion. When the tangential force is sufficient to overcome the friction force on the locking disk, the locking disk can rotate the rotating wheel at a certain angle to axially align the locking portion and the contact portion. In this way, the rotating wheel can always be stopped at a specific position and then engage with the displacement member, which can avoid rotating the rotating wheel to change the adjusted direction of the front end assembly to engage the rotating wheel with the displacement member, which can be more conducive to the endoscope to realize various functions.

[0017] In order to further better realize the utility model, the following setting structure is particularly adopted: the rotating sleeve includes a box body and a cover body; a positioning column is provided at the bottom of the box body, the end face cam plate is provided with a positioning hole and is plugged into the positioning column through the positioning hole to stop rotation, the cover body is detachably fixedly connected to the top opening of the box body, and one end of the spring abuts against the cover body.

[0018] When the above-mentioned setting structure is adopted, the rotating sleeve is set as a structure assembled by a box body and a cover body, which can facilitate the installation of various components in the annular cavity and reduce the difficulty of manufacturing the rotating sleeve.

[0019] In order to further better realize the present utility model, the following setting structure is particularly adopted: a radially protruding stop portion is provided on the circumferential side of the clamping plate, and a radially penetrating window extending along its circumferential direction is opened on the circumferential side of the cover body, wherein the stop portion extends into the window and there is a movable gap with at least one side of the circumferential direction of the window, and the central angle of the rotation center of the rotating sleeve opposite to the window is less than 180°, and when the stop portion abuts against the opposite sides of the window respectively, the displacement member is respectively located at the near rest section and the far rest section.

[0020] When the above-mentioned setting structure is adopted, the anti-rotation clamping plate can limit the rotation angle of the rotary drive component by extending into the stop part in the window, which can avoid excessive squeezing, wear and deformation of the locking part and the contact part due to excessive rotation angle or excessive force, thereby ensuring the reliability of locking.

[0021] In order to better realize the utility model, the following setting structure is particularly adopted: the center of the end face cam disc has an annulus, and the clamping disc is provided with a skirt which is coaxially arranged with the annulus and extends into the annulus. When the end face cam disc drives the clamping disc to displace axially, the skirt is axially displaced relative to the annulus at a position adjacent to the wall of the annulus.

[0022] When the above-mentioned structure is adopted, the clamping plate uses the skirt extending into the annulus to achieve positioning and guiding, which can limit the radial swing of the clamping plate during the lifting process, so as to improve the movement stability of the end face cam plate during the process of lifting the clamping plate.

[0023] In order to better realize the present utility model, the following setting structure is particularly adopted: the rotating wheel locking mechanism also includes a fixed sleeve, the fixed sleeve is used to be fixedly connected to the operating part of the endoscope, the fixed sleeve is sleeved on the wheel axle, the rotating sleeve is rotatably sleeved on the fixed sleeve, and the clamping plate is connected to the fixed sleeve for preventing rotation.

[0024] When the above-mentioned setting structure is adopted, the fixing sleeve with a rotation-stopping arrangement sleeved on the wheel axle is used to rotationally connect the clamping plate and rotationally connect the rotating sleeve, which can protect the wheel axle and facilitate the installation of the clamping plate.

[0025] In order to further better realize the utility model, the following setting structure is particularly adopted: the spring is set as a disc spring or a wave coil spring or a top-to-top wave spring.

[0026] When the above-mentioned setting structure is adopted, the spring can provide a sufficiently large support area and elastic force for the displacement member with a smaller axial size, which can avoid damage to the displacement member due to stress concentration, provide reliable restoring force and locking feel, and is very suitable for being set in an endoscope rotating wheel with a smaller axial size.

[0027] In order to better realize the present invention, the following configuration is particularly adopted: the hand-held portion is configured as a lever extending in a radial direction of the rotating sleeve away from the rotation center of the rotating sleeve.

[0028] When the above-mentioned setting structure is adopted, the lever-shaped hand-held part can make the locking action simple and efficient, and there is an obvious difference between the operation form of the lever-shaped hand-held part and the rotation form of the wheel, which can effectively prevent misoperation.

[0029] In order to further better realize the present utility model, the following setting structure is particularly adopted: the wheel axle is fixedly connected with a traction wheel, wherein the wheel axle is configured as a hollow shaft and is coaxially connected with the shaft holes of the rotating wheel and the traction wheel.

[0030] When the above-mentioned setting structure is adopted, the two ends of the wheel axle are connected with the rotating wheel and the traction wheel, so that another rotating shaft can be inserted into the rotating shaft to realize the double setting of the two rotating wheel locking mechanisms, and two or more rotating wheels with locking function can be easily set on one axis.

[0031] In order to better realize the present invention, the following configuration structure is particularly adopted: the contact portion is configured as an end face gear, and the locking portion is configured as an end face gear meshing with the contact portion.

[0032] The utility model also provides an endoscope, comprising an operating portion and the above-mentioned rotating wheel locking mechanism, wherein the rotating wheel locking mechanism is installed on the operating portion and is used to adjust the direction of the front end component.

[0033] The utility model has the following advantages and beneficial effects:

[0034] In the present invention, in the rotating wheel locking mechanism, when the rotating wheel and the displacement member are in contact with each other, the contact part and the locking part respectively arranged thereon are connected in the form of tooth groove meshing, and the displacement member arranged to stop the rotation anchors the rotating wheel through the circumferential abutment relationship to prevent the rotating wheel from being easily rotated. It can be seen that the rotating wheel locking mechanism abandons the method of directly providing damping by the spring to anchor the rotating wheel, so that the locking effect of the displacement member on the rotating wheel is more reliable, and it is not easy to cause wear on the contact surface to cause the problem of slipping and shaking of the rotating wheel, and the effective life can also be sufficiently guaranteed. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0036] Figure 1 is a schematic diagram of the top structure of the rotary wheel locking mechanism;

[0037] Figure 2 is a schematic diagram of the bottom structure of the rotary wheel locking mechanism;

[0038] Figure 3 It is a schematic diagram of the exploded structure of the rotary wheel locking mechanism;

[0039] Figure 4 is a schematic cross-sectional structural diagram of a rotary wheel locking mechanism;

[0040] Figure 5 Schematic diagram of the bottom structure of the runner;

[0041] Figure 6 The structure of the rotating wheel locking mechanism when the rotating wheel is removed is shown;

[0042] Figure 7 Shown in Figure 6 On this basis, the structure when rotating the sleeve is further removed;

[0043] Figure 8 Shown in Figure 7 The structure when the spring is further removed from the basis;

[0044] Fig. 9 Shown in Figure 8 On this basis, the structure when the locking disc is further removed;

[0045] Fig.10 Shown in Figure 8 On this basis, the structure when the pressing plate is further removed;

[0046] Fig.11 It is an exploded schematic diagram of the hand-held part, the box body and the end cam disc;

[0047] Fig.12 It is an exploded schematic diagram of the axle, fixed sleeve and pressure plate;

[0048] Fig.13 The matching relationship between the stopper of the pressing plate and the window of the cover body is shown;

[0049] Fig.14 The connection relationship between the clamping disc and the fixed sleeve and the positional relationship between the clamping disc and the end cam disc and the locking disc are shown;

[0050] Fig.15 The connecting structure between the box body and the cover body in the rotating sleeve is shown;

[0051] Fig.16 It is a schematic diagram of the structure of an endoscope.

[0052] The markings in the figure are:

[0053] 10. Rotary wheel locking mechanism; 11. Rotary wheel; 111. Contact part; 12. Wheel axle; 13. Displacement member; 131. Locking part; 13a. Locking disk; 13b. Pressure disk; 13b1. Stopper; 13b2. Skirt; 14. Rotary drive member; 141. Rotating sleeve; 141a. Annular cavity; 1411. Box body; 1411a. Positioning column; 1412. Cover body; 1412a. Window; 142. End face cam disk; 142a. Positioning hole; 142b. Annular space; 142c. Near rest section; 142d. Push section; 142e. Far rest section; 143. Hand-held part; 15. Spring; 16. Fixed sleeve; 17. Traction wheel; 20. Operating part; 30. Insertion part. DETAILED DESCRIPTION

[0054] In order to make the purpose, technical solution and advantages of the utility model clearer, the technical solution of the utility model will be described in detail below. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other implementation methods obtained by ordinary technicians in this field without creative work belong to the scope of protection of the utility model.

[0055] In the description of the present utility model, it should be noted that, unless otherwise specified, "multiple" means two or more; the terms "upper", "lower", "left", "right", "inner", "outer", "front end", "rear end", "head", "tail" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, which is only for the convenience of describing the present utility model and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model. In addition, the terms "first", "second", "third" and the like are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0056] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances.

[0057] On the one hand, the present application provides a wheel locking mechanism 10, which has high locking reliability, is not easy to wear and fail, and has a long service life. Figure 1-Figure 16 As shown, it is particularly configured as follows:

[0058] In this embodiment, the rotating wheel locking mechanism 10 has the ability to drive the traction wheel 17 to rotate to pull the traction rope. Figure 1-Figure 4 As shown, the rotating wheel locking mechanism 10 connects the rotating wheel 11 and the axle 12 to each other. One end of the axle 12 is axially fixed to the rotating wheel 11 through a snap ring, and is circumferentially connected to the rotating wheel 11 through a stop snap ring, so that the rotating wheel 11 and the axle 12 are fixed to rotate synchronously. The other end of the axle 12 is used to connect the traction wheel 17. When the rotating wheel 11 and the axle 12 are applied to the operating part of the endoscope, they are in a relatively rotatable relationship with the operating part.

[0059] The rotating wheel locking mechanism 10 also has the ability to lock the rotating wheel 11 and the axle 12. For this purpose, the rotating wheel locking mechanism 10 also includes a displacement member 13. When the displacement member 13 is applied to the operating part of the endoscope, it is in a rotation-stopping relationship with the operating part.

[0060] The rotating wheel 11 and the displacement member 13 are arranged opposite to each other, and the displacement member 13 can be displaced relative to the rotating wheel 11 to be close to or away from the rotating wheel 11. When the displacement member 13 is close to the rotating wheel 11, it can establish a connection relationship with the rotating wheel 11 to lock the rotating wheel 11 and prevent the rotating wheel 11 from being easily rotated.

[0061] The rotating wheel 11 is provided with a contact portion 111 on the side thereof facing the displacement member 13. At the same time, the displacement member 13 is provided with a locking portion 131 cooperating with the contact portion 111 on the side thereof facing the contact portion 111 of the rotating wheel 11. One of the contact portion 111 and the locking portion 131 is provided as a tooth, and the other is provided as a groove. When the displacement member 13 approaches the rotating wheel 11, the locking portion 131 can mesh with the contact portion 111 and form a circumferentially abutting portion at the meshing portion, so that the locking portion 131 can anchor the rotating wheel 11 through the circumferentially abutting portion with the contact portion 111.

[0062] In this embodiment, in the rotating wheel locking mechanism 10, when the rotating wheel 11 and the displacement member 13 are in contact with each other, the contact portion 111 and the locking portion 131 respectively arranged thereon are connected in the form of tooth-groove meshing, and the displacement member 13 arranged to prevent rotation anchors the rotating wheel 11 through the circumferential abutment relationship to prevent the rotating wheel from being easily rotated. It can be seen that the rotating wheel locking mechanism 10 abandons the method of directly providing damping by the spring to anchor the rotating wheel 11, so that the locking effect of the displacement member 13 on the rotating wheel 11 is more reliable, and it is not easy to cause wear on the contact surface to cause the rotating wheel 11 to slip and shake, and the effective life can also be sufficiently guaranteed.

[0063] According to some optional embodiments, the locking method of the rotating wheel 11 is translation locking, and a finger contact portion is provided on the displacement member 13, so that when the displacement member 13 is applied to the operating portion of the endoscope, the finger contact portion is exposed on the surface of the operating portion. At the same time, the displacement member 13 is slidably clamped in a slide groove provided on the operating portion, so that the doctor can push the displacement member 13 linearly with his fingers to make the displacement member 13 approach or move away from the contact portion 111 on the rotating wheel 11.

[0064] According to some optional embodiments, the locking method of the rotating wheel 11 is rotation locking, such as Figure 1-Figure 4 As shown, the rotary wheel locking mechanism 10 further includes a rotary drive member 14. When the rotary drive member 14 is applied to the operating portion of the endoscope, it is in a relatively rotatable relationship with the operating portion.

[0065] The rotary drive member 14 is provided with a hand-held portion 143 for a person to grasp to rotate the rotary drive member 14. The hand-held portion 143 can be a hand wheel similar to the rotating wheel 11 and Fig.16 The knob at the top of the rotating wheel 11 may also be Fig.11 The lever shown in .

[0066] The rotary driving member 14 and the displacement member 13 are axially arranged opposite to each other and form an end cam mechanism, so that the displacement member 13 can be displaced relative to the rotating wheel 11 through the rotation of the rotary driving member 14 .

[0067] In this embodiment, the rotatable rotary driving member 14 can be rotated by the hand-held portion 143 to convert the rotary motion into the displacement motion of the displacement member 13 to lock the rotating wheel 11. This makes the locking operation more convenient than the linear motion method.

[0068] Exemplarily, the rotation axis of the rotary drive member 14 is perpendicular to the rotation axis of the rotating wheel 11, so that the displacement member 13 approaches or moves away from the contact portion 111 from one radial side of the rotating wheel 11. Of course, the rotation axis of the rotary drive member 14 is parallel to or coincides with the rotation axis of the rotating wheel 11, so that the displacement member 13 approaches or moves away from the contact portion 111 from one axial side of the rotating wheel 11.

[0069] According to some optional embodiments, Figure 1-Figure 4 As shown, the rotation axis of the rotary drive member 14 coincides with the rotation axis of the rotating wheel 11 , so that the displacement member 13 moves toward or away from the contact portion 111 from one side in the axial direction of the rotating wheel 11 .

[0070] like Figure 3 and Figure 4 As shown, the rotary drive member 14 includes a rotating sleeve 141 and an end cam plate 142 coaxially sleeved on the wheel shaft 12. The rotating sleeve 141 is connected with a rod-shaped hand-held portion 143, which can coaxially rotate around the wheel shaft 12 under the drive of the hand-held portion 143.

[0071] like Fig.15 As shown, the rotating sleeve 141 is provided with an annular cavity 141a with an opening at one end facing the contact portion 111, wherein the displacement member 13 is disposed in the annular cavity 141a, and the locking portion 131 is exposed at the opening, and as shown in FIG. Figure 4 As shown, the contact portion 111 is axially opposite to the contact portion 111 through the opening. The contact portion 111 on the rotating wheel 11 passes downward through the opening of the active sleeve 141 into the annular cavity 141a, and is arranged close to the displacement member 13, so that the displacement member 13 can engage with the rotating wheel 11 through a shorter axial displacement to lock it.

[0072] like Figure 4 and Fig.13 As shown, the end cam disc 142 is arranged in the annular cavity 141a and installed at the bottom of the annular cavity 141a, so that the end cam disc 142 can rotate synchronously with the rotating sleeve 141. The bottom end of the displacement member 13 axially abuts against the cam surface of the end cam disc 142 at the top end. When the end cam disc 142 rotates synchronously with the rotating sleeve 141, the end cam disc 142 changes the displacement amount of the displacement member 13 through the cam surface, so that the displacement member 13 is close to or away from the contact portion 111 on the rotating wheel 11.

[0073] like Fig.10 and Fig.11 As shown, the cam surface disposed at the top end of the end cam disc 142 includes a near rest segment 142c, a thrust segment 142d and a far rest segment 142e which are continuous in the circumferential direction.

[0074] In this embodiment, the rotary drive member 14 integrates the end cam plate 142 and the displacement member 13 cooperating with the end cam plate 142 in an annular cavity 141a as a component, and is coaxially arranged with the wheel axle 12, which can further reduce the operating difficulty of the locking wheel 11 and simplify the mechanism structure.

[0075] Preferably, Figure 3 , Figure 4 , Figure 6 , Fig.14 and Fig.15 As shown, the rotating sleeve 141 includes a box body 1411 and a cover body 1412, wherein the top end of the box body 1411 is open, and the cover body 1412 is set as a box body structure with an open bottom end, and the peripheral wall of the cover body 1412 and the peripheral wall of the box body 1411 are provided with aligned screw holes. The cover body 1412 covers the top opening of the box body 1411 to reduce the larger top opening of the box body 1411 to a smaller opening, and the peripheral wall extends into the box body 1411 so that the screw holes of the two are aligned, and the screws radially pass through the aligned screw holes to detachably fix the box body 1411 and the cover body 1412. The rotating sleeve 141 is set as a structure in which the box body 1411 and the cover body 1412 are assembled, which can facilitate the installation of various components in the annular cavity 141a and reduce the difficulty of manufacturing the rotating sleeve 141.

[0076] Preferably, Fig.11 As shown, the rotating sleeve 141 is provided with a plurality of axially extending positioning columns 1411a arranged in sequence along the circumferential direction at the bottom of the box body 1411. At the same time, the end cam plate 142 is provided with a positioning hole 142a aligned with the positioning column 1411a at its bottom end. When the end cam plate 142 and the box body 1411 are installed, the positioning column 1411a extends into the corresponding positioning hole 142a to stop the end cam plate 142 and the box body 1411 from rotating.

[0077] Preferably, the bottom end of the displacement member 13 has a cam surface that matches the cam surface of the end cam plate 142 , which can improve the stability of the displacement member 13 during displacement and ensure sufficient contact surface to avoid wear of the displacement member 13 .

[0078] Preferably, the end surface of the end cam disc 142 is provided with a plurality of cam surfaces arranged in sequence and continuously along the circumferential direction, such as Fig.11 The four sections in the cam disc 142 are separated by a stop wall extending axially between the near rest section 142c and the far rest section 142e between the adjacent cam surfaces, and the cam surface at the bottom end of the displacement member 13 is arranged opposite to the cam surface on the end face cam disc 142. In this way, the end face cam disc 142 and the displacement member 13 can have four contact positions evenly distributed in the circumferential direction, which can further prevent the displacement member 13 from being worn.

[0079] According to some optional embodiments, Figure 3 , Figure 4 and Figure 6 As shown, a spring 15 is provided in the annular cavity 141a, the top end of the spring 15 abuts against the wall of the annular cavity 141a, specifically against the cover body 1412, and the other end abuts against the displacement member 13, pressing the displacement member 13 as a whole against the cam surface of the end face cam disk 142.

[0080] During the relative displacement of the displacement member 13 and the rotating wheel 11, when the locking portion 131 is disengaged from the contact portion 111, the displacement member 13 is located at the near rest section 142c of the cam surface of the end cam disk 142; when the locking portion 131 is engaged with the contact portion 111, the displacement member 13 is located at the far rest section 142e of the cam surface of the end cam disk 142.

[0081] Preferably, the top end of the spring 15 directly abuts against the cover body 1412 .

[0082] In this embodiment, the displacement member 13 is pressed against the end cam disc 142 by using the spring 15, so that the displacement action of the displacement member 13 can be not affected by the posture of the endoscope, and the displacement member 13 can be accurately and cleanly engaged or disengaged with the rotating wheel 11, which has good operability. At the same time, when the spring 15 is introduced, the spring 15 is not installed between the rotating wheel 11 and the displacement member 13, so that the risk of wear of the spring 15 is very low, and the effective life of the rotating wheel locking mechanism 10 can be guaranteed. At the same time, when the locking portion 131 is engaged with the contact portion 111, the displacement member 13 is located at the far resting section 142e of the cam surface of the end cam disc 142, and with the help of the spring 15, the displacement member 13 can be locked with the rotating wheel 11 and positioned, without the need to maintain it by hand all the time, which can conveniently free up hands for other work.

[0083] According to some optional embodiments, Figure 3 , Figure 4 , Figure 7-Figure 9 , Fig.14 and Fig.15 As shown, the displacement member 13 includes a locking plate 13a and a pressing plate 13b, which are coaxially arranged and abutted in the axial direction, and are also coaxially arranged with the end cam plate 142. The top end of the locking portion 131 is provided with a locking portion 131, the bottom end of the locking portion 131 abuts on the top end of the pressing plate 13b, and the bottom end of the pressing plate 13b abuts on the cam surface of the end cam plate 142.

[0084] The bottom end of the spring 15 directly abuts against the top of the locking portion 131 at a position avoiding the locking portion 131 , pressing the locking portion 131 against the top of the clamping plate 13 b , and further pressing the clamping plate 13 b against the cam surface of the end face cam plate 142 .

[0085] In the displacement member 13, the locking plate 13a and the pressure plate 13b are integrally arranged in the annular cavity 141a. The pressure plate 13b is arranged to prevent rotation relative to the operating part 20 of the endoscope, while the locking plate 13a is not absolutely arranged to prevent rotation relative to the operating part 20 of the endoscope. Instead, it relies on the pressure provided by the spring 15 so that the locking plate 13a is generally in a relatively non-rotating relationship with the pressure plate 13b.

[0086] Preferably, Figure 3 , Figure 5-Figure 8 , Fig.14 and Fig.15 As shown, the contact portion 111 provided on the rotating wheel 11 is configured as an end face gear, and at the same time, the locking portion 131 provided on the displacement member 13 is configured as an end face gear that can mesh with the contact portion 111 .

[0087] In this embodiment, the contact portion 111 and the locking portion 131 have a guiding function when they are meshed with each other, so that when they are slightly misaligned during the meshing process, they can push against each other through the circumferential surfaces to guide the contact portion 111 and the locking portion 131 to be axially aligned. For example, the contact portion 111 and the locking portion 131 can be configured as follows: Figure 5 and Figure 8 The gear shown in .

[0088] In this embodiment, the displacement member 13 is a component formed by a locking plate 13a and a pressure plate 13b which are axially pressed against each other under the action of a spring 15. In this way, under normal circumstances, the locking plate 13a and the pressure plate 13b are anti-rotation bodies that do not rotate relative to each other, thereby ensuring that the locking plate 13a can be moved to the rotating wheel 11, and the rotating wheel 11 can be reliably locked by the engagement of the locking portion 131 with the contact portion 111. Since the contact portion 111 and the locking portion 131 can guide each other to be axially aligned during the meshing process, in some cases, when the locking portion 131 and the contact portion 111 are axially misaligned to a certain extent, and when the rotating wheel 11 is stabilized, the contact portion 111 will apply a tangential force to the locking portion 131. When the tangential force is sufficient to overcome the friction force on the locking disk 13a, the locking disk 13a can rotate the rotating wheel 11 to a certain angle to axially align the locking portion 131 with the contact portion 111. In this way, the rotating wheel 11 can always be stopped at a specific position and then meshed with the displacement member 13, and it can be avoided that the rotating wheel 11 is rotated to change the adjusted direction of the front end assembly to allow the rotating wheel 11 to mesh with the displacement member 13, which can be more conducive to the endoscope to realize various functions.

[0089] from Figure 6-Figure 11 It can be seen that in the annular cavity 141a of the rotating sleeve 141, along the axial direction of the wheel axle 12, the spring 15, the locking plate 13a, the pressure plate 13b, and the end cam plate 142 are stacked in sequence, and the end cam plate 142 is stacked on the bottom of the box body 1411 of the rotating sleeve 141, and the structure is very compact.

[0090] According to some optional embodiments, Figure 3 and Fig.12 As shown, the circumferential side of the pressing plate 13b is provided with a stopper 13b1 protruding in the radial direction. Figure 3 and Fig.13As shown, a window 1412a is provided on the circumferential side of the cover body 1412 at a position opposite to the stopper 13b1. A notch is formed at the top of the window 1412a, which radially penetrates the wall of the cover body 1412 and extends an arc length along the circumference thereof.

[0091] like Fig.13 As shown, the stop portion 13b1 extends into the window 1412a, and the circumferential arc length of the window 1412a is greater than the axial width of the stop portion 13b1, so that the stop portion 13b1 does not occupy the circumferential space of the window 1412a, but has a movable gap with at least one side of the circumferential direction of the window 1412a.

[0092] When the stopper 13b1 abuts against the opposite sides of the window 1412a, the displacement member 13 is located at the near rest section 142c and the far rest section 142e on the cam surface of the end cam plate 142. The central angle of the rotation center of the rotating sleeve 141 opposite to the window 1412a should be less than 180°, so as to facilitate the control of the rotation angle of the rotary drive member 14, and enable the pressing plate 13b with a rotation-stopping arrangement to limit the rotation angle of the rotary drive member 14 through the stopper 13b1 extending into the window 1412a, so as to avoid excessive compression and wear and deformation of the locking portion 131 and the contact portion 111 due to excessive rotation angle or excessive force, thereby ensuring the reliability of locking.

[0093] According to some optional embodiments, Figure 4 and Fig.14 As shown, an annulus 142b is formed at the center of the end cam disc 142 between the wheel shaft 12 or the fixed sleeve 16, and the axial hole of the pressure disc 13b is provided with a skirt 13b2 extending downward, which is coaxially arranged with the annulus 142b and extends into the annulus 142b. The outer peripheral surface of the skirt 13b2 is arranged adjacent to the axial hole wall of the end cam disc 142, and when the displacement member 13 moves to engage with the contact portion 111 of the rotating wheel 11 through the locking portion 131 to anchor the rotating wheel 11, the skirt 13b2 does not completely withdraw from the annulus 142b. In this way, the pressure disc 13b can achieve positioning and guiding functions by using the skirt 13b2 extending into the annulus 142b. When the end cam plate 142 drives the pressure plate 13b to axially displace, the skirt 13b2 is adjacent to the wall of the annulus 142b and axially displaces relative to the annulus 142b, thereby limiting the radial swing of the pressure plate 13b during the lifting process, thereby improving the movement stability of the pressure plate 13b during the lifting process of the end cam plate 142.

[0094] According to some optional embodiments, Figure 2-Figure 4 , Figure 6-Figure 10 and Figure 12-Figure 15As shown, the rotating wheel locking mechanism 10 is provided with a fixed sleeve 16 on the wheel axle 12. The fixed sleeve 16 is configured as an end flange member with a flange at the bottom end. When applied to the operating part of the endoscope, the fixed sleeve 16 is fixed to the shell of the operating part through the flange to form a rotation-stopping relationship.

[0095] The fixed sleeve 16 is sleeved on the bottom of the wheel axle 12 , and the rotating sleeve 141 is rotatably sleeved on the fixed sleeve 16 and fastened by a locking nut and a retaining ring installed on the fixed sleeve 16 for axial positioning.

[0096] like Fig.12 and Fig.14 As shown, a square shaft is provided at the top of the fixed sleeve 16, and the axial hole of the clamping plate 13b is set as a square shaft. The clamping plate 13b is sleeved on the square shaft at the top of the fixed sleeve 16 to prevent circumferential rotation. The axial length of the square shaft is greater than the axial length of the square hole, so that the clamping plate 13b can be axially displaced along the square shaft under the lifting action of the end face cam plate 142 to drive the locking plate 13a abutting against its top end to approach or move away from the rotating wheel 11.

[0097] In this embodiment, the fixing sleeve 16 with a rotation-stopping arrangement is sleeved on the axle 12 to rotationally connect the clamping plate 13b and rotationally connect the rotating sleeve 141, which can protect the axle 12 and facilitate the installation of the clamping plate 13b.

[0098] According to some optional embodiments, in order to be arranged in a place with a smaller axial dimension and provide sufficient elastic force, the spring 15 can be arranged as a disc spring or a wave coil spring or a top-to-top wave spring. Figure 3 and Figure 7 As shown, it is set as a top-to-top wave spring, and can be further set as a flat-end top-to-top wave spring.

[0099] In this embodiment, after the spring 15 is configured as a top-to-top wave spring, it can provide a sufficiently large supporting area and elastic force for the displacement member 13 with a smaller axial dimension, thereby preventing the displacement member 13 from being damaged due to stress concentration, providing reliable restoring force and locking feel, and is very suitable for being set in an endoscope rotating wheel with a smaller axial dimension.

[0100] According to some optional embodiments, Fig.13 As shown, the hand-held portion 143 is configured as a lever extending in a radial direction of the rotating sleeve 141 in a direction away from the rotation center of the rotating sleeve 141 , and the lever is closer to the bottom end of the axle 12 relative to the rotating wheel 11 .

[0101] Preferably, Fig.11 As shown, the free end of the handle 143 is provided with an end sleeve.

[0102] In this embodiment, the lever-shaped hand-held portion 143 can make the locking action simple and efficient, and the operation mode of the lever-shaped hand-held portion 143 is significantly different from the rotation mode of the wheel 11, which can effectively prevent misoperation.

[0103] According to some optional embodiments, Figure 3 , Figure 4 and Fig.11 As shown, one end of the hand-held part 143 connected to the bottom end of the box body 1411 is provided with a ring, and an axially penetrating screw hole is provided on the ring, and the bottom end of the box body 1411 is provided with an annular groove, and a screw hole is provided in the annular groove to be aligned with the screw hole provided on the hand-held part 143. The ring of the hand-held part 143 is embedded in the annular groove at the bottom end of the box body 1411 and the two are fastened together by screws.

[0104] According to some optional embodiments, Figure 2-Figure 4 and Fig.12 As shown, a traction wheel 17 is fixedly connected to the bottom end of the axle 12. The axle 12 is set as a hollow axle, and the shaft holes of the rotating wheel 11 and the traction wheel 17 are also axially connected. After the two ends of the axle 12 are respectively fixed to the rotating wheel 11 and the traction wheel 17, the center hole of the axle 12 is coaxially connected with the shaft holes of the rotating wheel 11 and the traction wheel 17 to form a through hole. The through hole allows another axle to be inserted into the axle 12, so that two rotating wheel locking mechanisms are arranged in sequence along the axial direction to form a double-linked structure, so that two or more rotating wheels with locking functions can be easily arranged on one axis, which is not only suitable for endoscopes with bidirectional adjustment of the front end assembly, but also suitable for endoscopes with four-way adjustment or more-directional adjustment of the front end assembly.

[0105] Fig.16 There are two rotating wheels installed on the operating part of the endoscope shown in , wherein each rotating wheel can be configured as a rotating wheel locking mechanism 10 .

[0106] Preferably, the traction wheel 17 is integrally formed with the axle 12. Figure 3 A wire groove is arranged on the periphery of the traction wheel 17, and a column for fixing the end of the traction rope is arranged at one place of the wire groove.

[0107] On the other hand, the present application provides an endoscope, particularly adopting the following configuration:

[0108] In this embodiment, Fig.16 As shown, the endoscope includes an operating portion 20, an insertion portion 30 connected to the front end of the operating portion 20, and a rotating wheel locking mechanism 10 installed on the operating portion 20. The rotating wheel locking mechanism 10 adopts the rotating wheel locking mechanism 10 in any of the above embodiments.

[0109] In some optional embodiments, the fixed sleeve 16 in the wheel locking mechanism 10 is fixedly connected to the shell of the operating part 20 by screws, the wheel axle 12 is axially positioned and rotatably inserted in the fixed sleeve 16, and the rotary drive member 14 is axially positioned and rotatably sleeved on the fixed sleeve 16 as a whole.

[0110] The traction wheel 17 can be driven to rotate by rotating the rotating wheel 11 to adjust the direction of the front end assembly. When the direction of the front end assembly is adjusted to the right position, the rotating sleeve 141 and the end cam plate 142 circumferentially positioned with the rotating sleeve 141 are driven to rotate by circumferentially toggling the rod-shaped hand-held portion 143, and the end cam plate 142 rotates relative to the pressure plate 13b, and the locking plate 13a is pushed axially to approach the rotating wheel 11 through the cam surface. When the locking plate 13a is at the far rest section 142e of the cam surface of the end cam plate 142, the contact portion 111 and the locking portion 131, which are end gears, are meshed, so that the rotating wheel 11 is locked and cannot be easily rotated.

[0111] The above description is only a specific implementation of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed by the present invention, which should be included in the protection scope of the present invention.

Claims

1. A rotary wheel locking mechanism, applied to an endoscope, characterized in that: include: A rotating wheel (11) provided with a contact portion (111); A wheel axle (12), one end of which is fixedly connected to the rotating wheel (11) and can rotate synchronously with the rotating wheel (11), and the other end of which is used to be connected to the traction wheel (17); a displacement member (13) arranged on one side of the rotating wheel (11) so as to be rotationally fixed relative to the rotating wheel (11), the displacement member (13) being provided with a locking portion (131) and being capable of displacement relative to the rotating wheel (11) to move closer to or farther from the contact portion (111); One of the contact portion (111) and the locking portion (131) is configured as a tooth, and the other is configured as a groove; when the displacement member (13) is close to the rotating wheel (11), the locking portion (131) can mesh with the contact portion (111) and abut against each other in the circumferential direction to anchor the rotating wheel (11).

2. A rotary wheel locking mechanism according to claim 1, characterized in that: It also comprises a rotatably arranged rotary drive member (14); the rotary drive member (14) is provided with a hand-held portion (143) for a person to grasp to rotate the rotary drive member (14); the rotary drive member (14) and the displacement member (13) are axially arranged opposite to each other and form an end face cam mechanism.

3. A rotating wheel locking mechanism according to claim 2, characterized in that: The rotary drive member (14) comprises a rotating sleeve (141) and an end cam disc (142) coaxially sleeved on the wheel shaft (12); The rotating sleeve (141) is rotatable about the wheel shaft (12) and is connected to the hand-held portion (143); an annular cavity (141a) is provided in the rotating sleeve (141) and has an opening at one end facing the contact portion (111); the displacement member (13) is arranged in the annular cavity (141a); and the locking portion (131) is axially opposite to the contact portion (111) through the opening; The end face cam disc (142) is arranged in the annular cavity (141a) and can rotate synchronously with the rotating sleeve (141), wherein the displacement member (13) axially abuts against the cam surface of the end face cam disc (142).

4. A rotating wheel locking mechanism according to claim 3, characterized in that: A spring (15) is arranged in the annular cavity (141a), one end of the spring (15) abuts against the wall of the annular cavity (141a), and the other end abuts against the displacement member (13) to press it against the cam surface of the end face cam disc (142); When the locking portion (131) is disengaged from the contact portion (111), the displacement member (13) is located at a near resting section (142c) of the cam surface of the end face cam disc (142); when the locking portion (131) is engaged with the contact portion (111), the displacement member (13) is located at a far resting section (142e) of the cam surface of the end face cam disc (142); The contact portion (111) and the locking portion (131) are configured as structures that can guide each other through their respective circumferential surfaces during the meshing process to achieve axial alignment.

5. A rotating wheel locking mechanism according to claim 4, characterized in that: The displacement member (13) comprises a locking plate (13a) and a pressure plate (13b) which are axially abutted against each other. One end of the locking portion (131) is provided with the locking portion (131) and abuts against the other end of the spring (15). The other end of the locking portion (131) is pressed against one end of the pressure plate (13b) through the spring (15) so as to press the pressure plate (13b) against the cam surface of the end face cam plate (142). The pressure plate (13b) is arranged in the annular cavity (141a) to prevent rotation.

6. A rotating wheel locking mechanism according to claim 5, characterized in that: The rotating sleeve (141) comprises a box body (1411) and a cover body (1412); a positioning column (1411a) is provided at the bottom of the box body (1411); the end face cam disc (142) is provided with a positioning hole (142a) and is plugged into the positioning column (1411a) through the positioning hole (142a) to prevent rotation; the cover body (1412) is detachably fixedly connected to the top opening of the box body (1411); one end of the spring (15) abuts against the cover body (1412).

7. A rotating wheel locking mechanism according to claim 6, characterized in that: The circumferential side of the clamping disc (13b) is provided with a radially protruding stopper (13b1), and the circumferential side of the cover body (1412) is provided with a radially penetrating window (1412a) extending in its circumferential direction, wherein the stopper (13b1) extends into the window (1412a), and the central angle of the rotation center of the rotating sleeve (141) opposite to the window (1412a) is less than 180°, and when the stopper (13b1) is respectively in contact with the opposite sides of the window (1412a), the displacement member (13) is respectively located at the near rest section (142c) and the far rest section (142e); And / or, the end face cam disc (142) has an annulus (142b) at its center, the pressure disc (13b) is provided with a skirt (13b2) coaxially arranged with the annulus (142b) and extending into the annulus (142b), and when the end face cam disc (142) drives the pressure disc (13b) to axially displace, the skirt (13b2) is axially displaced relative to the annulus (142b) at a position adjacent to the wall of the annulus (142b).

8. A rotating wheel locking mechanism according to claim 5, characterized in that: It also comprises a fixed sleeve (16), the fixed sleeve (16) being used for being fixedly connected to the operating part of the endoscope, the fixed sleeve (16) being sleeved on the wheel shaft (12), the rotating sleeve (141) being rotatably sleeved on the fixed sleeve (16), and the pressing plate (13b) being non-rotatably connected to the fixed sleeve (16); And / or, the spring (15) is configured as a disc spring, a wave coil spring, or a top-to-top wave spring; And / or, the hand-held portion (143) is configured as a lever extending in a radial direction of the rotating sleeve (141) in a direction away from the rotation center of the rotating sleeve (141).

9. A rotating wheel locking mechanism according to any one of claims 1 to 8, characterized in that: The wheel axle (12) is fixedly connected to a traction wheel (17), wherein the wheel axle (12) is configured as a hollow shaft and is coaxially connected to the shaft holes of the rotating wheel (11) and the traction wheel (17); And / or, the contact portion (111) is configured as an end face gear, and the locking portion (131) is configured as an end face gear meshing with the contact portion (111).

10. An endoscope, characterized in that: It comprises an operating part (20) and a rotating wheel locking mechanism (10) according to any one of claims 1 to 9, wherein the rotating wheel locking mechanism (10) is mounted on the operating part (20) and is used to adjust the direction of the front-end component.

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