Endoscope zoom mechanism and endoscope

Abstract

The utility model relates to the technical field of medical instruments, and particularly discloses an endoscope zoom mechanism, comprising: a mounting lens barrel comprising a main body part and a mounting part, the main body part having an inner cavity and being provided with an avoiding groove communicating with the inner cavity; the movable lens cone comprises a lens cone main body and a connecting part, the lens cone main body is slidably arranged in the inner cavity, one end of the connecting part is connected with the lens cone main body, and the other end extends out of the inner cavity through the avoiding groove; the linear motor is arranged on the mounting part, and an output shaft of the linear motor is fixedly connected with one end, extending out of the avoiding groove, of the connecting part so as to drive the movable lens cone to move in the axial direction. The endoscope zooming mechanism is higher in precision, good coaxiality can be provided, the risk that the movable lens cone inclines and deviates in the moving process is reduced, the zooming process is smoother, and the image quality is more stable. The utility model further discloses an endoscope which also has the above technical effects.

Description

Technical Field

[0001] The present application relates to the technical field of medical devices, and more specifically, to an endoscope zoom mechanism and an endoscope. Background Art

[0002] Optical magnification endoscopes can observe the location of lesions more intuitively. The magnification function can be used to observe details that cannot be observed by conventional endoscopes, such as the surface mucosal morphology. In conventional mode, doctors use low magnification to find the location of the lesion, and then use optical zoom to magnify the image, which is more conducive to diagnosing the disease. Optical magnification endoscopes mainly use a zoom mechanism to move the zoom lens in the objective optical system relative to the fixed lens along the optical axis to achieve optical zoom.

[0003] Common zoom mechanisms include wire rope traction mechanisms and cam zoom mechanisms. The wire rope traction mechanism is prone to tilting the moving barrel during zooming, which can cause jamming or stuck. The cam zoom mechanism drives the camshaft to rotate through the rotation of the motor, and the rotation of the camshaft drives the moving barrel to move along the optical axis. It reduces the probability of the moving barrel jamming to a certain extent, but because the motor is located on the operating handle of the endoscope and the motor is connected to the camshaft through a torsion spring, the structure is complex and the driving force transmission distance is long, resulting in a loss of transmission efficiency. After the insertion part of the mirror body is bent, the resistance to the driving force transmission increases, and the uncontrollable factors in the body increase, which may cause zoom failure and other situations, thereby affecting the image quality. Utility Model Content

[0004] In view of this, the purpose of the present application is to provide an endoscope zoom mechanism and an endoscope, the structural design of which can effectively solve the problem of unstable image quality caused by the endoscope zoom mechanism.

[0005] In order to achieve the above objectives, this application provides the following technical solutions:

[0006] An endoscope zoom mechanism, comprising:

[0007] The mounting lens barrel comprises a main body and a mounting portion arranged parallel to the main body, wherein the main body has an inner cavity, and a relief groove is provided on one side of the main body connected to the mounting portion to connect the inner cavity with the outside thereof;

[0008] The movable lens barrel comprises a lens barrel body and a connecting part, wherein the lens barrel body is slidably arranged in the inner cavity, one end of the connecting part is connected to the lens barrel body, and the other end extends out of the inner cavity through the avoidance groove;

[0009] A linear motor is arranged on the mounting portion, and an output shaft of the linear motor is fixedly connected to an end of the connecting portion extending out of the avoidance groove, so as to drive the movable lens barrel to move axially.

[0010] Optionally, the above-mentioned endoscope zoom mechanism further includes a guide shaft arranged along the axial direction and fixedly connected to the output shaft, and the output shaft is fixedly connected to an end of the connecting part extending out of the avoidance groove through the guide shaft.

[0011] Optionally, the above-mentioned endoscope zoom mechanism also includes a guide bushing, which is arranged on the main body, and the guide bushing is provided with a guide hole coaxially arranged with the guide shaft. The guide shaft passes through the guide hole and can move axially along the guide hole under the drive of the output shaft.

[0012] Optionally, the above-mentioned endoscope zoom mechanism also includes a guide bushing, which is arranged on the main body, and the guide bushing is provided with a guide hole coaxially arranged with the output shaft, and the output shaft passes through the guide hole and can move axially along the guide hole.

[0013] Optionally, in the above-mentioned endoscope zoom mechanism, the guide bushing is arranged at one end of the main body away from the mounting portion, and the connecting portion is located between the guide bushing and the mounting portion.

[0014] Optionally, in the above-mentioned endoscope zoom mechanism, a first step surface is formed in the axial direction at one end of the main body away from the mounting portion, and the guide bushing includes a bushing body and a protrusion formed by radially extending from the outer circumferential surface of the bushing body, and the bushing body is sleeved on the outside of the end of the main body away from the mounting portion and abuts against the first step surface, and the guide hole is provided on the protrusion.

[0015] Optionally, in the above-mentioned endoscope zoom mechanism, there is an installation space connected to the outside between the protrusion and the mounting portion, and the endoscope zoom mechanism also includes a protective cover, which is arranged outside the guide bushing and the mounting portion, and the edge of the protective cover is sealed and connected to the guide bushing, the main body and the mounting portion to seal the installation space.

[0016] Optionally, in the above-mentioned endoscope zoom mechanism, the protective cover is U-shaped, and two second step surfaces are axially provided on the main body, the two second step surfaces are located on both sides of the avoidance groove and the mounting portion, and the two side edges of the protective cover are respectively abutted against the second step surfaces and sealed by glue.

[0017] Optionally, in the above endoscope zoom mechanism, a notch is provided on the first end surface of the guide bushing at a position where it intersects with the second step surface, and the notch is used for dispensing glue to seal the protective cover to the main body;

[0018] And / or, the second end face of the guide bushing is flush with the end of the protective cover, and the second end face is provided with a bushing chamfer at the edge connected to the protective cover, and the bushing chamfer is used for dispensing to make the guide bushing and the protective cover sealed;

[0019] The first end surface is the end surface of the guide bushing facing the mounting portion, and the second end surface is the end surface of the guide bushing away from the mounting portion.

[0020] The endoscope zoom mechanism provided by the present application includes a mounting barrel, a movable barrel and a linear motor. The mounting barrel includes a main body and a mounting part arranged in parallel with the main body, the main body has an inner cavity, and the main body is provided with a avoidance groove connecting the inner cavity with the outside of the main body on one side connected to the mounting part; the movable barrel includes a barrel body and a connecting part, the barrel body is slidably arranged in the inner cavity, one end of the connecting part is connected to the barrel body, and the other end extends out of the inner cavity through the avoidance groove; the linear motor is arranged in the mounting part, and the output shaft of the linear motor is fixedly connected to one end of the connecting part extending out of the avoidance groove, so as to drive the movable barrel to move axially.

[0021] The endoscope zoom mechanism provided by the present application is applied, the mounting barrel is provided with a mounting portion, the moving barrel is provided with a connecting portion, and the linear motor is provided at the mounting portion, and its output shaft is connected to the connecting portion, so that the moving barrel can be driven to move axially to achieve zooming. The linear motor drive is adopted, and the linear motor is provided at the mounting barrel, which eliminates the motion form conversion of structures such as cams and lead screws, reduces the intermediate matching, and has higher precision. In addition, since the output shaft of the linear motor is a rigid body, the parallelism of the output shaft and the optical axis is ensured during assembly, which can provide good coaxiality, reduce the risk of tilting and offsetting of the moving barrel during movement, and the zooming process will be smoother and the image quality will be more stable.

[0022] In order to achieve the above object, the present application also provides an endoscope, which includes any of the above endoscope zoom mechanisms. Since the above endoscope zoom mechanism has the above technical effects, the endoscope having the endoscope zoom mechanism should also have corresponding technical effects. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the embodiments of the present application 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 present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0024] Figure 1 This is a structural schematic diagram of an endoscope zoom mechanism according to a specific embodiment of the present application;

[0025] Figure 2 for Figure 1 The exploded structural diagram of the endoscope zoom mechanism shown;

[0026] Figure 3 for Figure 1 The cross-sectional structure diagram of the movable lens barrel in the endoscope zoom mechanism shown is located at the first zoom position;

[0027] Figure 4 for Figure 1 The cross-sectional structure diagram of the movable lens barrel in the endoscope zoom mechanism shown is located at the second zoom position;

[0028] Figure 5 for Figure 2 The schematic diagram of the structure of the mounting lens barrel in the endoscope zoom mechanism is shown.

[0029] The following are marked in the accompanying drawings:

[0030] Install the lens barrel 100, move the lens barrel 200, the linear motor 300, the guide shaft 400, the guide bushing 500, the protective cover 600, the front lens barrel 700, the rear lens barrel 800, the lens base 900, and the sensor 910;

[0031] Main body 110, mounting portion 120, inner cavity 111, avoidance groove 112, first step surface 113, second step surface 114, first mounting hole 121, second mounting hole 122, third step surface 123;

[0032] The lens barrel body 210, the connecting portion 220, and the receiving hole 221;

[0033] Output shaft 310;

[0034] Guide shaft glue dispensing groove 410;

[0035] Guide hole 501, bushing body 510, protrusion 520, notch 502, bushing chamfer 503;

[0036] Front lens barrel flange 710, front lens barrel glue dispensing groove 720;

[0037] Rear lens barrel flange 810, rear lens barrel glue dispensing groove 820;

[0038] Mirror base chamfer 901. DETAILED DESCRIPTION

[0039] The embodiment of the present application discloses an endoscope zoom mechanism and an endoscope to improve the smoothness during the zooming process and improve the stability of the image quality.

[0040] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0041] In the zooming process of the endoscope zoom mechanism, the driving device drives the movable lens barrel to move axially in the mounting lens barrel, so as to change the axial distance between the lens on the movable lens barrel (i.e., the movable lens) and the lens on the fixed lens barrel (i.e., the fixed lens) to achieve zooming. The fixed lens barrel can be fixedly arranged in the mounting lens barrel, such as fixedly arranged at the front and rear ends of the mounting lens barrel, that is, the movable lens barrel is located between the fixed lens barrels at both ends. Alternatively, a fixed lens can also be arranged in the mounting lens barrel, that is, the mounting lens barrel can also serve as a fixed lens barrel. The number of fixed lenses can be set as needed, and is not specifically limited here. The conventional driving device is arranged in the operating handle of the endoscope, and drives the movable lens barrel to move through the conversion of motion forms such as cams and screws. The driving force transmission distance is long and the reliability is low. In the present application, a linear motor is adopted and directly arranged in the mounting lens barrel to reduce intermediate coordination, shorten the transmission distance, and improve reliability.

[0042] In a specific embodiment, see Figure 1-Figure 2The endoscope zoom mechanism provided by the present application includes a mounting barrel 100, a movable barrel 200 and a linear motor 300. Among them, the mounting barrel 100 is used to install the linear motor 300 and the movable barrel 200, and includes a main body 110 and a mounting portion 120, the mounting portion 120 is parallel to the main body 110, the main body 110 has an inner cavity 111, and the main body 110 is provided with a avoidance groove 112 that connects the inner cavity 111 with the outside of the inner cavity 111 on one side connected to the mounting portion 120. It can be understood that the main body 110 and the mounting portion 120 can be either an integrally formed structure or a split structure that is fixedly connected or detachably connected. While the mounting portion 120 provides an installation position for the linear motor 300, the overall space occupied by the mounting barrel 100 is small, which is conducive to the layout at the end of the endoscope head. Exemplarily, the mounting portion 120 can be radially protruded from the outer peripheral surface of one end of the main body 110. The movable lens barrel 200 comprises a lens barrel body 210 and a connecting portion 220, wherein the lens barrel body 210 is slidably arranged in the inner cavity 111, one end of the connecting portion 220 is connected to the lens barrel body 210, and the other end extends out of the inner cavity 111 through the avoidance groove 112. It is understandable that the lens barrel body 210 and the connecting portion 220 can be an integrally formed structure, or a split structure that is fixedly connected or detachably connected. The lens barrel body 210 is provided with a lens, and the lens barrel body 210 can slide in the inner cavity 111. The connecting portion 220 is mainly used to cooperate with the linear motor 300 to realize traction and limit. The linear motor 300 is arranged in the mounting portion 120, and the output shaft 310 of the linear motor 300 is connected to one end of the connecting portion 220 extending out of the avoidance groove 112 to drive the movable lens barrel 200 to move axially. That is, the axial movement of the output shaft 310 of the linear motor 300 drives the connecting portion 220 to drive the movable lens barrel 200 to move axially as a whole, thereby realizing zooming.

[0043] The endoscope zoom mechanism provided by the present application is applied, the mounting barrel 100 is provided with a mounting portion 120, and the mobile barrel 200 is provided with a connecting portion 220. By arranging the linear motor 300 at the mounting portion 120, the output shaft 310 thereof is connected with the connecting portion 220, so that the mobile barrel 200 can be driven to move along the axial direction to achieve zooming. The linear motor 300 is arranged at the mounting barrel 100, and the motion form conversion of structures such as cams and lead screws is omitted, thereby reducing the transmission loss of the force in the zooming process, the utilization rate of the force is higher, and the structure is simpler. And the linear motor 300 is used to drive the mobile barrel 200, which reduces the intermediate matching and has higher precision. In addition, since the output shaft 310 of the linear motor 300 is a rigid body, and it is installed at the mounting barrel 100, the output shaft 310 of the linear motor 300 is ensured to be parallel to the optical axis during assembly, so that good coaxiality can be provided, and the risk of tilting and offsetting of the mobile barrel 200 during movement is reduced, and the zooming process will be smoother and the image quality will be more stable.

[0044] In some embodiments, there is a gap between the outer diameter of the lens barrel body 210 of the movable lens barrel 200 and the inner diameter of the inner cavity 111 to ensure coaxiality while ensuring smooth zooming to avoid jamming during sliding.

[0045] In some embodiments, the zoom mechanism further includes a guide shaft 400, which is arranged along the axial direction and fixedly connected to the output shaft 310, and the output shaft 310 is fixedly connected to one end of the connecting portion 220 extending out of the avoidance groove 112 through the guide shaft 400. That is, in this embodiment, the output shaft 310 is indirectly connected to the connecting portion 220 through the guide shaft 400, and the guide shaft 400 acts as an intermediate bridge. Compared with the direct connection of the output shaft 310 to the connecting portion 220, the setting of the guide shaft 400 reduces the impact on the motor output shaft 310 during the operation, so as to avoid the occurrence of subsequent unsmooth movement and the like. Indirect connection through the guide shaft 400 can also facilitate the assembly of the overall structure, and help to make full use of the moving stroke of the output shaft 310.

[0046] Specifically, Figure 2 As shown in FIG. 3 , a receiving hole 221 is provided on the connecting portion 220, and the guide shaft 400 is fixedly arranged in the receiving hole 221 (that is, the connecting portion 220 is sleeved outside the guide shaft 400), and an inner hole is provided at one end of the guide shaft 400 facing the mounting portion 120, and the output shaft 310 can be fixedly connected to the inner hole through hole-shaft matching. It can be understood that the types of the receiving hole 221 and the inner hole can be set according to actual needs. Exemplarily, a blind hole is provided at one end of the guide shaft 400 facing the mounting portion 120, and the end of the output shaft 310 is fixedly arranged in the blind hole, wherein the output shaft 310 and the blind hole of the guide shaft 400 can be bonded, such as being fixed in the blind hole by glue.

[0047] Furthermore, a guide shaft glue dispensing groove 410 is provided on the outer circumference of the guide shaft 400, and the guide shaft glue dispensing groove 410 is used for dispensing glue to fix the outer circumference of the guide shaft 400 with the inner wall surface of the accommodating hole 221. By providing the guide shaft glue dispensing groove 410, a space for accommodating glue is provided, and glue can be dispensed in the guide shaft glue dispensing groove 410 in advance before the guide shaft 400 and the movable lens barrel 200 are assembled, and then the guide shaft 400 is assembled into the accommodating hole 221 of the movable lens barrel 200, and then the glue is cured to achieve a reliable connection between the guide shaft 400 and the movable lens barrel 200.

[0048] Further, in some embodiments, the zoom mechanism can also include a guide bushing 500, which is arranged on the main body 110, and the guide bushing 500 is provided with a guide hole 501 coaxially arranged with the guide shaft 400, and the guide shaft 400 is penetrated in the guide hole 501 and can move axially along the guide hole 501 under the drive of the output shaft 310. It can be understood that the guide bushing 500 can be an independent component independent of the installation barrel 100, and can also be used as a part of the installation barrel 100. Adopting the linear motor 300 drive, the straightness of the output shaft 310 has a direct impact on the coaxiality of the zoom mechanism. By setting the guide bushing 500, the guide bushing 500 is provided with a guide hole 501 to cooperate with the guide shaft 400, and the guide hole 501 can play a guiding and limiting role on the guide shaft 400, so that the guide shaft 400 always moves in the hole guide hole 501 during the focusing process, and will not be separated, so as to ensure the straightness of the output shaft 310 during the movement. Specifically, the guide hole 501 and the guide shaft 400 are clearance-matched to avoid problems such as friction and chipping during sliding, thereby affecting image quality.

[0049] In some embodiments, the zoom mechanism further includes a guide bushing 500, which is disposed on the main body 110. The guide bushing 500 is provided with a guide hole 501 coaxially disposed with the output shaft 310. The output shaft is inserted into the guide hole 501 and can move axially along the guide hole 501. The difference between this embodiment and the above embodiment is that the guide hole 501 on the guide bushing 500 in the above embodiment cooperates with the guide shaft 400, and in this embodiment, the guide hole 501 on the guide bushing 500 cooperates with the output shaft 310. Then the guide hole 501 can guide and limit the output shaft 310, so that the output shaft 310 always moves in the hole guide hole 501 during the focusing process and will not be separated, so as to ensure the straightness of the output shaft 310 during the movement. It can be understood that in this embodiment, the output shaft 310 can be directly connected to the connecting portion 220, or indirectly connected to the connecting portion 220 through the guide shaft 400.

[0050] In some embodiments, the guide bushing 500 is arranged at one end of the main body 110 away from the mounting portion 120, and the connecting portion 220 is located between the guide bushing 500 and the mounting portion 120. The guide bushing 500 is arranged at the end away from the mounting portion 120, so that the end of the output shaft 310 and / or the guide shaft 400 that cooperates with the guide hole 501 can be effectively supported and limited, and the straightness of the movement can be better maintained. In other embodiments, the guide bushing 500 can also be arranged at one end close to the mounting portion 120, that is, the guide bushing 500 is located between the connecting portion 220 and the mounting portion 120.

[0051] In some embodiments, see Figure 2 and Figure 5The end of the main body 110 away from the mounting portion 120 is formed with a first step surface 113 in the axial direction. The guide bushing 500 includes a bushing body 510 and a protrusion 520 formed by radially extending from the outer peripheral surface of the bushing body 510. The bushing body 510 is sleeved outside the end of the main body 110 away from the mounting portion 120 and abuts against the first step surface 113. The guide hole 501 is provided in the protrusion 520. It can be understood that the bushing body 510 and the protrusion 520 can be either an integral structure or a split structure that is fixedly connected or detachably connected. The end of the main body 110 away from the mounting portion 120 has a head end whose outer diameter is reduced relative to the outer diameter of its main body, and a first step surface 113 is formed between the head end and the main body of the main body 110. The guide bushing 500 and the head end axial hole of the main body 110 cooperate, and the specific bushing body 510 can be sleeved outside the head end of the mounting lens barrel 100 to provide a reliable connection, and the protrusion 520 provides space for the guide hole 501, and the end face of the protrusion 520 can be used to abut against the connecting part 220 to limit the position. The bushing body 510 set as above takes up little space as a whole, which is conducive to layout on the head end of the endoscope. In addition, through the setting of the first step surface 113, the positioning of the guide bushing 500 can be achieved, which is convenient for its installation, and also avoids increasing the radial size of the endoscope zoom mechanism.

[0052] In some embodiments, see Figure 1 and Figure 2 , there is an installation space (or open installation space) communicated with the outside between the protrusion 520 and the mounting portion 120, and the endoscope zoom mechanism also includes a protective cover 600, the protective cover 600 is arranged outside the guide bushing 500 and the mounting portion 120, and the edge of the protective cover 600 is sealed and connected with the guide bushing 500, the main body 110 and the mounting portion 120 to seal the installation space. By arranging this open installation space, it is convenient to assemble the movable lens barrel 200 with the output shaft 310 and / or the guide shaft 400. By arranging the protective cover 600, its edge is sealed and connected with the guide bushing 500, the main body 110 and the mounting portion 120, so that the matching position of the output shaft 310 of the linear motor 300 and the movable lens barrel 200 and the matching position of the movable lens barrel 200 and the mounting lens barrel 100 are sealed to prevent water vapor from entering the interior of the objective lens, further improving the imaging quality.

[0053] In other embodiments, the protective cover 600 and the mounting barrel 100 are an integrated structure, that is, the mounting barrel 100 may also include two inner cavities parallel to each other, one inner cavity (as the inner cavity 111 of the main body 110) is used to install the movable barrel 200, and the other inner cavity (as the mounting portion 120) is used to install the linear motor 300, and the two inner cavities are connected through a avoidance groove, and the connecting portion 220 of the movable barrel 200 extends into the inner cavity where the linear motor 300 is located through the avoidance groove and is directly or indirectly connected to the output shaft 310 of the linear motor 300.

[0054] In some embodiments, the protective cover 600 is U-shaped, and two second step surfaces 114 are axially arranged on the main body 110. The two second step surfaces 114 are located on both sides of the avoidance groove 112 and the mounting portion 120. The edges on both sides of the protective cover 600 are respectively against the second step surfaces 114 and sealed by glue. During installation, the protective cover 600 is placed outside the guide bushing 500, the connecting portion 220 and the mounting portion 120, and the edges on both sides are respectively against the second step surfaces 114 on both sides. The second step surfaces 114 can limit the protective cover 600 and facilitate glue dispensing, so that the protective cover 600 is better sealed and connected with the mounting lens barrel 100 and the guide bushing 500.

[0055] In some embodiments, a first end surface of the guide bushing 500 (i.e., the end surface of the guide bushing 500 facing the mounting portion 120) is provided with a notch 502 at a position intersecting with the second step surface 114, and the notch 502 is used for dispensing glue to seal the protective cover 600 with the main body 110. By providing the notch 502, it is convenient to fill the glue, so as to better seal the protective cover 600 with the mounting lens barrel 100 and the guide bushing 500. Specifically, the end surface of the guide bushing 500 that abuts against the first step surface 113 is provided with a notch 502 at a position intersecting with the second step surface 114.

[0056] In some embodiments, the second end face of the guide bushing 500 (i.e., the end face of the guide bushing 500 away from the mounting portion 120) is flush with the end of the protective cover 600, and the second end face is provided with a bushing chamfer 503 at the edge connected to the protective cover 600, and the bushing chamfer 503 is used for dispensing glue to make the guide bushing 500 and the protective cover 600 sealed and connected. During installation, the end of the protective cover 600 away from the mounting portion 120 is made flush with the second end face of the guide bushing 500, and the bushing chamfer 503 is provided on the guide bushing 500, so as to facilitate filling glue to strengthen the seal, thereby better sealing the guide bushing 500 and the protective cover 600. It is understandable that, if the thickness or processing of the protective cover 600 allows, a circle of chamfers can also be provided on the edges of the protective cover 600, and dispensing glue on the chamfers of the protective cover 600 can also facilitate dispensing glue.

[0057] In some embodiments, the mounting portion 120 is disposed at one end of the main body 110, and the mounting portion 120 is provided with a first mounting hole 121 and a second mounting hole 122 that are connected to each other, the aperture of the first mounting hole 121 is larger than the aperture of the second mounting hole 122 to form a third step surface 123, the linear motor 300 is disposed in the first mounting hole 121 and abuts against the third step surface 123, and the output shaft 310 is passed through the second mounting hole 122. That is, the mounting portion 120 is provided with a sink hole, which includes the first mounting hole 121 and the second mounting hole 122, and the third step surface 123 formed therebetween can limit the linear motor 300, thereby facilitating the installation of the linear motor 300 and ensuring its coaxiality with the moving lens barrel 200. The output shaft 310 is passed through the second mounting hole 122 to connect with the moving lens barrel 200 and drive it to move axially.

[0058] In some embodiments, see Figure 1-4 The endoscope zoom mechanism also includes a front lens barrel 700 and / or a rear lens barrel 800. The outer circumferential surface of the front lens barrel 700 is provided with a front lens barrel flange 710, which abuts against the end surface of the mounting lens barrel 100, and the outer circumferential surface of the front lens barrel 700 is provided with a front lens barrel glue dispensing groove 720, which is used for dispensing glue to fix the front lens barrel 700 with the mounting lens barrel 100; the outer circumferential surface of the rear lens barrel 800 is provided with a rear lens barrel flange 810, which abuts against the other end of the mounting lens barrel 100, and the outer circumferential surface of the rear lens barrel 800 is provided with a rear lens barrel glue dispensing groove 820, which is used for dispensing glue to fix the rear lens barrel 800 with the mounting lens barrel 100. It is understandable that the front lens barrel 700 and the rear lens barrel 800 are respectively provided with lenses to cooperate with the lenses on the mobile lens barrel 200 for imaging, and the distance between the lenses is changed by the axial movement of the mobile lens barrel 200 to achieve zooming. The front lens barrel 700 and the rear lens barrel 800 cooperate with the main body 110 of the mounting lens barrel 100 through the axial hole, and by arranging the front lens barrel flange 710 on the outer peripheral surface of the front lens barrel 700, it can be against the front end surface of the mounting lens barrel 100 for positioning, which is convenient for assembly. The front lens barrel glue dispensing groove 720 is provided on the outer peripheral surface of the front lens barrel 700 to provide a storage space for glue, and glue can be dispensed in the front lens barrel glue dispensing groove 720 before the front lens barrel 700 is assembled with the mounting lens barrel 100, and then the front lens barrel 700 is assembled to the inner cavity 111 of the mounting lens barrel 100, and then the glue is cured to achieve a reliable connection between the front lens barrel 700 and the mounting lens barrel 100. The assembly method of the rear lens barrel 800 and the mounting lens barrel 100 is the same as that of the rear lens barrel 800 and will not be described in detail here.

[0059] In some embodiments, the endoscope zoom mechanism further comprises a lens holder 900, which is arranged at the rear end of the rear lens barrel 800. The inner hole of the lens holder 900 and the outer diameter of the main body 110 of the lens barrel 100 are matched with each other so that the lens holder 900 is sleeved outside the main body 110 of the lens barrel 100. A slot is arranged at a position corresponding to the mounting portion 120 of the lens barrel 100 on the lens holder 900 to avoid the position. A gap is left between the inner hole of the lens holder 900 and the outer peripheral surface of the lens barrel 100 for image transmission debugging. The end face of the lens holder 900 facing the front lens barrel 700 is provided with a lens holder chamfer 901, which is convenient for filling glue at the chamfer position of the lens holder 900 after the image transmission debugging is completed, so that the lens holder 900 is sealed and fixedly connected with the main body 110. Further, a sensor 910 is provided on the lens holder 900, which is specifically installed on the step surface at the rear end of the lens holder 900.

[0060] In some embodiments, when the movable lens barrel 200 moves to the point where the connecting portion 220 abuts against the end surface of the guide bushing 500 facing the mounting portion 120, the movable lens barrel 200 is limited to the first zoom position, and when the movable lens barrel 200 moves to the point where the connecting portion 220 abuts against the end surface of the mounting portion 120 facing the guide bushing 500, the movable lens barrel 200 is limited to the second zoom position. When the movable lens barrel 200 axially moves between the first zoom position and the second zoom position, the guide shaft 400 is always located in the guide hole 501 and can axially move along the guide hole 501, so that the guide shaft 400 can always play a guiding role during the zooming process to ensure straightness. In order to facilitate the control of the first zoom position and the second zoom position of the movable lens barrel 200, a limiting surface cooperating with the movable lens barrel 200 is provided in this embodiment, and the limiting surface is also the sinking surface acting on the movable lens barrel 200 during the zooming process. Specifically, the end surface of the guide bushing 500 facing the movable lens barrel 200 can be used as the limiting surface at one end, and the end surface of the mounting portion 120 facing the movable lens barrel 200 can be used as the limiting surface at the other end. Then, when the output shaft 310 of the linear motor 300 drives the movable lens barrel 200 to move axially until the connecting portion 220 abuts against the end surface of the guide bushing 500, the movable lens barrel 200 moves to the first zoom position, such as Figure 3 When the output shaft 310 of the linear motor 300 drives the movable lens barrel 200 to move axially until the end surface of the connecting portion 220 abuts against the end surface of the mounting portion 120, the movable lens barrel 200 moves to the second zoom position, as shown in FIG. Figure 4As shown. Among them, one of the first zoom position and the second zoom position can be a wide-angle position, or a position called ordinary observation, and the other can be an enlarged position. The limiting surface is set on the guide bushing 500 and the mounting portion 120, which can better cooperate with the output shaft 310 of the linear motor 300, and the coaxiality of the mobile lens barrel 200 is better, and it is not easy to tilt during the zooming process. In other embodiments, it is also possible to respectively set a protruding first limiting portion and a second limiting portion in the inner cavity 111, so that when the mobile lens barrel 200 moves axially to the lens barrel body 210 and the first limiting portion and the second limiting portion respectively abut, the mobile lens barrel 200 is displaced to the first zoom position and the second zoom position respectively. In other embodiments, the two side end faces of the mobile lens barrel 200 can also be limited with the sinking surface of the front lens barrel or the rear lens barrel.

[0061] Based on the endoscope zoom mechanism provided in the above embodiments, the present application further provides an endoscope, which includes any one of the endoscope zoom mechanisms in the above embodiments. Since the endoscope adopts the endoscope zoom mechanism in the above embodiments, please refer to the above embodiments for the beneficial effects of the endoscope.

[0062] The various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referenced to each other.

[0063] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present application. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. An endoscope zoom mechanism, characterized in that: include: The mounting lens barrel (100) comprises a main body (110) and a mounting portion (120) arranged parallel to the main body (110), the main body (110) having an inner cavity (111), and a relief groove (112) for connecting the inner cavity (111) with the outside of the main body (110) is provided on one side of the main body (110) connected to the mounting portion (120); A movable lens barrel (200) comprises a lens barrel body (210) and a connecting portion (220), wherein the lens barrel body (210) is slidably disposed in the inner cavity (111), one end of the connecting portion (220) is connected to the lens barrel body (210), and the other end extends out of the inner cavity (111) through the avoidance groove (112); A linear motor (300) is arranged on the mounting portion (120), and an output shaft (310) of the linear motor (300) is fixedly connected to an end of the connecting portion (220) extending out of the avoidance groove (112) to drive the movable lens barrel (200) to move axially.

2. The endoscope zoom mechanism according to claim 1, characterized in that: It also includes a guide shaft (400) arranged along the axial direction and fixedly connected to the output shaft (310); the output shaft (310) is fixedly connected to one end of the connecting portion (220) extending out of the avoidance groove (112) through the guide shaft (400).

3. The endoscope zoom mechanism according to claim 2, characterized in that: It also includes a guide bushing (500) disposed on the main body (110), wherein the guide bushing (500) is provided with a guide hole (501) coaxially arranged with the guide shaft (400), and the guide shaft (400) is inserted into the guide hole (501) and can move axially along the guide hole (501) driven by the output shaft (310).

4. The endoscope zoom mechanism according to claim 1, characterized in that: It also includes a guide bushing (500) disposed on the main body (110), wherein the guide bushing (500) is provided with a guide hole (501) coaxially arranged with the output shaft (310), and the output shaft (310) is inserted into the guide hole (501) and can move axially along the guide hole (501).

5. The endoscope zoom mechanism according to claim 3 or 4, characterized in that: The guide bushing (500) is arranged at one end of the main body (110) away from the mounting portion (120), and the connecting portion (220) is located between the guide bushing (500) and the mounting portion (120).

6. The endoscope zoom mechanism according to claim 5, characterized in that: A first step surface (113) is formed in the axial direction at one end of the main body (110) away from the mounting portion (120); the guide bushing (500) comprises a bushing body (510) and a protrusion (520) radially extending from the outer peripheral surface of the bushing body (510); the bushing body (510) is sleeved outside the end of the main body (110) away from the mounting portion (120) and abuts against the first step surface (113); and the guide hole (501) is provided in the protrusion (520).

7. The endoscope zoom mechanism according to claim 6, characterized in that: An installation space connected to the outside is provided between the protruding portion (520) and the mounting portion (120), and the endoscope zoom mechanism also includes a protective cover (600), which is arranged outside the guide bushing (500) and the mounting portion (120), and the edge of the protective cover (600) is sealed and connected to the guide bushing (500), the main body (110) and the mounting portion (120) to seal the installation space.

8. The endoscope zoom mechanism according to claim 7, characterized in that: The protective cover (600) is U-shaped, and two second step surfaces (114) are axially arranged on the main body (110), the two second step surfaces (114) are located on both sides of the avoidance groove (112) and the mounting portion (120), and the two side edges of the protective cover (600) are respectively abutted against the second step surfaces (114) and sealed by glue.

9. The endoscope zoom mechanism according to claim 8, characterized in that: A notch (502) is provided on the first end surface of the guide bushing (500) at a position where it intersects with the second step surface (114), and the notch (502) is used for dispensing glue to seal the protective cover (600) and the main body (110); And / or, the second end face of the guide bushing (500) is flush with the end of the protective cover (600), and the second end face is provided with a bushing chamfer (503) at the edge connected to the protective cover (600), and the bushing chamfer (503) is used for dispensing glue to seal the guide bushing (500) and the protective cover (600); The first end surface is the end surface of the guide bushing (500) facing the mounting portion (120), and the second end surface is the end surface of the guide bushing (500) away from the mounting portion (120).

10. An endoscope, characterized in that: It comprises an endoscope zoom mechanism as described in any one of claims 1 to 9.

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