Focusing mechanism and endoscope with buffer
By introducing a combination of slider and elastic member into the focus mechanism of the electronic endoscope, the problem of insufficient tensile strength at the connection between the focus wire and the moving lens barrel is solved, and a higher service life and a lower maintenance cost are achieved.
Patent Information
- Application Number
- CN202420181323.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-01-24
- Publication Date
- 2025-04-08
- Estimated Expiration
- 2034-01-24
AI Technical Summary
In existing electronic endoscopes, the area where the focus wire and the moving lens barrel are cemented or welded is very small, resulting in a low tensile strength at the connection, which is prone to degumming or desoldering, causing the zoom function to fail.
A focusing mechanism with buffering is designed, including a slider and an elastic member, which moves in the first direction to pull the focusing wire. The elastic member is arranged on the slider movement path to provide resistance to share the tension of the slider and reduce the tension of the focusing wire.
By sharing the tension force by elastic parts, the risk of degumming or desoldering at the connection between the focus wire and the moving lens barrel is reduced, the service life of the focus mechanism is improved and the maintenance cost is reduced.
Smart Images
Figure CN222734338U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of endoscopes, in particular to a focusing mechanism with a buffer and an endoscope. Background Art
[0002] An electronic endoscope is an electronic optical instrument that can be inserted into the cavity of industrial equipment or the human body cavity and organ cavity for direct observation, diagnosis, and treatment. It integrates advanced technologies such as optics, mechanics, and electricity. Electronic endoscopes usually include a camera module with a manual zoom function. A lens is required in the camera module to be able to move back and forth. This movable lens is called a mobile lens. The mobile lens is fixedly connected to the mobile lens barrel, and the mobile lens barrel and the focusing wire are generally fixed together by bonding or welding. When the zoom lever is operated to rotate clockwise by a certain angle, the movable lens barrel can be driven to move linearly in a first direction through the transmission assembly and the focusing wire, thereby driving the mobile lens to move; when the zoom lever is operated to rotate counterclockwise by a certain angle, the movable lens barrel can be driven to move linearly in a direction opposite to the first direction through the transmission assembly and the focusing wire, thereby driving the mobile lens to move, thereby realizing the zoom function.
[0003] However, the internal space of the electronic endoscope is compact, so the focusing wire should not be thicker, and the size of the moving lens barrel should not be larger. Therefore, the bonding or welding area between the focusing wire and the moving lens barrel is very small, resulting in low tensile strength at the joint. When the tension of the focusing wire is large or it has been used many times, the probability of debonding or desoldering between the focusing wire and the moving lens barrel is high, causing the zoom function to fail.
[0004] In view of the above-mentioned shortcomings, it is necessary to design a focusing mechanism and an endoscope with a buffer. Utility Model Content
[0005] Therefore, the technical problem to be solved by the utility model is that in the existing electronic endoscope, the area of mutual bonding or welding between the focusing wire and the movable lens barrel is very small, and the probability of debonding or desoldering at the connection between the focusing wire and the movable lens barrel is relatively high, so a focusing mechanism and endoscope with a buffer are provided.
[0006] In order to solve the above technical problems, the technical solution of the utility model is as follows:
[0007] A focusing mechanism with a buffer, the focusing mechanism comprising:
[0008] A slider, the slider moves in a first direction to pull the focusing wire to move along the first direction;
[0009] An elastic member is disposed on a path along which the slider moves in the first direction, and generates resistance to the movement of the slider in the first direction.
[0010] Further, in the first direction, the elastic member is arranged in front of the slider, and when the slider moves along the first direction, the slider presses the elastic member; or,
[0011] In the first direction, the elastic member is disposed behind the slider, and when the slider moves along the first direction, the elastic member pulls back the slider.
[0012] Furthermore, it also includes a push rod, a first end of which enters into a slide groove in the slider, and a second end is connected to the focusing wire, the elastic member is arranged on the first end of the push rod, and the end of the elastic member away from the second end is restricted from moving, and a protrusion is formed on the slider protruding into the slide groove, and when the slider moves along the first direction, the protrusion pushes the free end of the elastic member to drive the push rod and the focusing wire to move along the first direction.
[0013] Furthermore, a limiting sleeve is mounted on the first end, and the elastic member is pre-compressed and disposed between the limiting sleeve and the protruding portion.
[0014] Furthermore, a boss is provided at the second end, and when the slider moves along a second direction opposite to the first direction, the slider abuts against the boss.
[0015] Furthermore, a limiting structure is included. In the second direction, the limiting structure is located in front of the push rod to limit the distance that the push rod is pushed by the slider and moves along the second direction.
[0016] Furthermore, it also includes a limiting structure seat, and the limiting structure is installed on the limiting structure seat. Preferably, the position of the limiting structure on the limiting structure seat is adjustable.
[0017] Furthermore, it also includes a guide tube, a protective tube is fixedly sleeved on the outside of the focusing steel wire, the guide tube is fixedly sleeved on the outside of the protective tube, the protective tube is fixed to the outside of the focusing steel wire, a guide groove is opened on the limiting structure, and the guide tube is gap-inserted into the guide groove to guide the movement of the focusing steel wire.
[0018] Furthermore, it also includes a fastener, which passes through the push rod and presses against the protection tube to fix the focusing wire and the push rod.
[0019] Furthermore, it also includes a base plate and a slider seat, wherein the slider seat is fixed on the base plate, and a slider groove for slidably accommodating the slider is provided in the slider seat; and / or,
[0020] It also includes a zoom lever, a first rotating seat, a crank, a second rotating seat, and a connecting rod. The zoom lever is fixedly connected to the first rotating seat, the first rotating seat is fixedly connected to the second rotating seat coaxially, the crank is fixedly installed on the second rotating seat, one end of the connecting rod is hinged to the crank, and the other end is hinged to the slider.
[0021] The technical solution of the utility model has the following advantages:
[0022] 1. The utility model provides a focusing mechanism with a buffer, comprising a slider and an elastic member, the slider moves in a first direction to pull the focusing wire to move along the first direction; the elastic member is arranged on a path where the slider moves in the first direction, and the elastic member generates resistance to the movement of the slider in the first direction. In this way, whether the slider continues to move briefly in the first direction after the moving lens barrel is adjusted to a position and does not move, or the slider moves in the first direction to pull the focusing wire and the moving lens barrel during the entire process, the elastic member will always share a part of the pulling force from the slider, thereby reducing the pulling force on the focusing wire, continuously ensuring the connection performance of the connection between the focusing wire and the moving lens barrel, reducing the risk of debonding or desoldering at the connection between the focusing wire and the moving lens barrel due to excessive pulling force of the slider on the focusing wire through the push rod, thereby increasing the service life of the focusing mechanism and reducing the maintenance cost.
[0023] 2. The buffered focusing mechanism provided by the utility model also includes a push rod, a first end of the push rod enters into a slide groove in the slider, and a second end is connected to a focusing wire. An elastic member is arranged on the first end of the push rod, and an end of the elastic member away from the second end is restricted from moving. A protrusion is formed on the slider protruding into the slide groove. When the slider moves along a first direction, the protrusion pushes the free end of the elastic member to drive the push rod and the focusing wire to move along the first direction. In this way, the compression of the elastic member can be guided and protected by the push rod, so that the direction of the force exerted by the elastic member on the slider is stable.
[0024] 3. The buffered focusing mechanism provided by the utility model has a limiting sleeve installed on the first end, and the elastic member is pre-compressed and arranged between the limiting sleeve and the protruding portion to prevent the slider from generating an empty stroke when moving along the first direction.
[0025] 4. The utility model provides a focusing mechanism with a buffer, and a boss is provided at the second end. When the slider moves in a second direction opposite to the first direction, the slider abuts against the boss. In this way, the push rod can not only be used to install the elastic member, but also can be used by the slider as a force transmission element to drive the focusing wire to move in the second direction, thereby simplifying the design of the force transmission structure.
[0026] 5. The buffered focusing mechanism provided by the utility model also includes a limiting structure. In the second direction, the limiting structure is located in front of the push rod to limit the distance that the push rod is pushed by the slider and moves along the second direction, so as to avoid adverse effects caused by excessive movement of the focusing wire. For example, if the focusing wire moves too far in the second direction, the focusing wire will be exposed too much from the limiting structure seat and will be collided and bent, thereby being unable to move in the first direction, making the focusing function invalid.
[0027] 6. The buffered focusing mechanism provided by the utility model also includes a limiting structure seat, on which the limiting structure is mounted, and the position of the limiting structure on the limiting structure seat is adjustable to meet the travel required for different focusing operations.
[0028] 7. The buffered focusing mechanism provided by the utility model further comprises a fastener, which passes through the push rod and is pressed against the protective tube to fix the focusing wire to the push rod, thereby preventing the focusing wire from loosening from the push rod.
[0029] An endoscope comprises the aforementioned focusing mechanism with buffer.
[0030] The technical solution of the utility model has the following advantages:
[0031] The endoscope provided by the utility model has all the advantages of the aforementioned focusing mechanism with buffer. BRIEF DESCRIPTION OF THE DRAWINGS
[0032] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.
[0033] Figure 1 It is a side view of the endoscope (mainly with a buffered focusing mechanism) in the embodiment of the utility model;
[0034] Figure 2 It is a cross-sectional schematic diagram of an endoscope (mainly a focusing mechanism with a buffer) when the slider in the embodiment of the utility model is in the initial state;
[0035] Figure 3 It is a partially enlarged cross-sectional schematic diagram of an endoscope (mainly a focusing mechanism with a buffer) when the slider in the embodiment of the utility model is in the initial state;
[0036] Figure 4 It is a cross-sectional schematic diagram of the endoscope (mainly a focusing mechanism with a buffer) when the slider in the embodiment of the utility model moves toward the first direction;
[0037] Figure 5 It is a partially enlarged cross-sectional schematic diagram of the endoscope (mainly a focusing mechanism with a buffer) when the slider in the embodiment of the utility model moves toward the first direction;
[0038] Figure 6 for Figure 4 Enlarged schematic diagram of the dotted line part.
[0039] Description of reference numerals:
[0040] 1. Base plate; 21. Slider seat; 22. Slider; 221. Slide groove; 222. Protrusion; 31. Push rod; 311. First end; 312. Second end; 313. Boss; 32. Elastic member; 33. Limit sleeve; 41. Limit structure seat; 42. Limit structure; 421. Guide groove; 51. Focus wire; 52. Protection tube; 53. Guide tube; 61. Zoom lever; 62. First rotating seat; 63. Second rotating seat; 64. Crank; 65. Connecting rod. DETAILED DESCRIPTION
[0041] The technical solution of the utility model will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.
[0042] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying 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 limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.
[0043] In the description of the present invention, it should be noted 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 it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.
[0044] In addition, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.
[0045] like Figures 1 to 6 As shown, this embodiment provides an endoscope, which includes a focusing mechanism with a buffer (hereinafter referred to as the focusing mechanism), a movable lens barrel (not shown) fixedly connected to the focusing wire 51, and a movable lens (not shown) mounted on the movable lens barrel. The focusing mechanism includes a substrate 1, a slider seat 21, a slider 22, a limiting structure seat 41, a limiting structure 42, a push rod 31, an elastic member 32, a focusing wire 51, a protective tube 52, and a guide tube 53. Among them, the slider seat 21 and the limiting structure seat 41 are both fixedly mounted on the substrate 1.
[0046] The slider seat 21 has a slider slot (not marked). The slider 22 is slidably mounted in the slider slot. The slider 22 moves along a first direction (such as Figure 4 When the push rod 31 slides, a pulling force is generated on the focusing wire 51 through the push rod 31.
[0047] The elastic member 32 is disposed on the path of the slider 22 moving along the first direction, and the elastic member 32 generates resistance to the movement of the slider 22 along the first direction. In this embodiment, the elastic member 32 is a spring.
[0048] The elastic member 32 is sleeved on the first end 311 of the push rod 31. The elastic member 32 is guided and protected by the push rod 31, so that the direction of the force exerted by the elastic member 32 on the slider 22 is stable. A limit sleeve 33 is provided on the first end 311, and the limit sleeve 33 limits the left end of the elastic member 32. The first end 311 of the push rod 31 enters the slide groove 221 in the slider 22, and the second end 312 is connected to the focusing wire 51. A protrusion 222 is formed on the slider 22 protruding into the slide groove 221. The elastic member 32 is pre-compressed and arranged between the limit sleeve 33 and the protrusion 222. When the slider 22 moves in the slider groove along a first direction, the protrusion 222 pushes the free end of the elastic member 32 opposite to the limit end, so as to drive the push rod 31 and the focusing wire 51 to move in the first direction. The second end 312 of the push rod 31 is provided with a boss 313. When the slider 22 moves in the slider groove along a second direction (such as Figure 4 When the push rod 31 and the focusing wire 51 move in the second direction, the slider 22 abuts against the boss 313 to push the push rod 31 and the focusing wire 51 to move in the second direction.
[0049] In this embodiment, due to the setting of the elastic member 32, no matter when the movable lens barrel is adjusted into position and does not move, and accordingly, the push rod 31 does not move, and the slider 22 briefly continues to move along the first direction, or during the entire process that the slider 22 moves along the first direction and pulls the focusing wire 51 and the movable lens barrel, the elastic member 32 will share a part of the pulling force from the slider 22, so that the pulling force on the focusing wire 51 is reduced, and the connection performance of the connection between the focusing wire 51 and the movable lens barrel is continuously guaranteed, and the risk of debonding or desoldering at the connection between the focusing wire 51 and the movable lens barrel due to excessive pulling force on the focusing wire 51 is reduced, so as to make the focusing function ineffective, thereby increasing the service life of the focusing mechanism and reducing the maintenance cost.
[0050] The limiting structure 42 is installed on the limiting structure seat 41. Preferably, the position of the limiting structure 42 on the limiting structure seat 41 is adjustable to meet the travel required for different focusing. In the second direction, the limiting structure 42 is located in front of the push rod 31 to limit the moving distance of the push rod 31 pushed by the slider 22 along the second direction to avoid the adverse effects caused by excessive movement. For example, if the focusing wire 51 moves too far in the second direction, the focusing wire 51 will be exposed too much from the limiting structure seat 41 and will be collided and bent, thereby being unable to move in the first direction. In addition, the limiting structure 42 is also provided with a guide groove 421 coaxially arranged with the focusing wire 51.
[0051] The protective tube 52 is sleeved on the outside of the focusing wire 51 and welded to the focusing wire 51, and the guide tube 53 is fixedly sleeved on the outside of the protective tube 52. The focusing wire 51, the protective tube 52, and one end of the guide tube 53 adjacent to the push rod 31 are all fixedly connected to the push rod 31. Specifically, a fastener (not shown) passes through the push rod 31 and abuts against the protective tube 52 to fix the focusing wire 51 to the push rod 31 and prevent the focusing wire 51 from loosening from the push rod 31. The guide tube 53 is inserted into the guide groove 421 with a gap. The dual guiding effect of the guide tube 53 and the limiting structure 42, and the protective tube 52 and the guide tube 53 can ensure that the motion guide is always effective, prevent the motion failure caused by the bending of the focusing wire 51 due to eccentricity, and improve the motion reliability of the focusing mechanism.
[0052] In this embodiment, the focus adjustment mechanism further includes a zoom lever 61, a first rotating seat 62, a second rotating seat 63, a crank 64, and a connecting rod 65. The zoom lever 61 is fixedly connected to the first rotating seat 62, the first rotating seat 62 is fixedly connected to the second rotating seat 63 coaxially, the crank 64 is fixedly mounted on the second rotating seat 63, one end of the connecting rod 65 is hinged to the crank 64, and the other end is hinged to the slider 22. When the zoom lever 61 is toggled, the first rotating seat 62, the second rotating seat 63, and the crank 64 can be driven to rotate to a certain extent, thereby driving the connecting rod 65 to swing, and finally driving the slider 22 to slide along the sliding groove.
[0053] The following describes how the focusing mechanism with buffer in this embodiment realizes the focusing function:
[0054] In the initial state, the protrusion 222 of the slider 22 is connected to the boss 313 of the push rod 31, and the elastic member 32 is limited between the protrusion 222 and the limiting sleeve 33 and is in a pre-compressed state;
[0055] The zoom lever 61 is turned counterclockwise to drive the first rotating seat 62 and the second rotating seat 63 to rotate, thereby driving the crank 64 to swing. The crank 64 drives the slider 22 to move in the first direction (i.e., backward) through the connecting rod 65. The protrusion 222 on the slider 22 abuts against the free end of the elastic member 32, and the elastic member 32 is limited between the limiting sleeve 33 on the first end 311 of the push rod 31 and the protrusion 222 of the slider 22. Therefore, when the slider 22 moves, it can drive the push rod 31 and the focus wire 51 to move backward to adjust the focus.
[0056] The zoom lever 61 is turned counterclockwise to drive the slider 22 to move in the second direction (i.e., forward) through the crank 64 and the connecting rod 65. The slider 22 abuts against the boss 313 on the push rod 31, driving the push rod 31 and the focusing wire 51 to move forward together until the second end 312 of the push rod 31 abuts against the left end of the limiting structure seat 41, and the push rod 31 cannot move. During the movement of the focusing wire 51, the guide tube 53 slides along the guide groove 421 on the limiting structure 42 to guide the movement of the focusing wire 51 for focusing.
[0057] In other embodiments, in the first direction, the elastic member 32 is disposed in front of the slider 22 . When the slider 22 moves along the first direction, the slider 22 squeezes the elastic member 32 , and the elastic member 32 reacts on the slider 22 to prevent the slider 22 from moving backward.
[0058] In other embodiments, in the first direction, the elastic member 32 is disposed behind the slider 22 , and when the slider 22 moves along the first direction, the elastic member 32 pulls back the slider 22 to prevent the slider 22 from moving backward.
[0059] Furthermore, the push rod 31 in this embodiment can not only be used to protect and guide the elastic member 32, but can also be used by the slider 22 as a force transmission element to drive the focusing wire 51 to move along the second direction, thereby simplifying the design of the force transmission structure.
[0060] Obviously, the above embodiments are merely examples for the purpose of clear explanation, and are not intended to limit the implementation methods. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived therefrom are still within the scope of protection of the invention of the utility model.
Claims
1. A focusing mechanism with a buffer, characterized in that: The focusing mechanism comprises: A slider (22), wherein the slider (22) moves along a first direction to pull the focusing wire (51) to move along the first direction; An elastic member (32), wherein the elastic member (32) is arranged on a path along which the slider (22) moves in the first direction, and the elastic member (32) generates resistance to the movement of the slider (22) in the first direction.
2. The focusing mechanism with buffer according to claim 1, characterized in that: In the first direction, the elastic member (32) is arranged in front of the slider (22), and when the slider (22) moves along the first direction, the slider (22) presses the elastic member (32); or, In the first direction, the elastic member (32) is arranged behind the slider (22); when the slider (22) moves along the first direction, the elastic member (32) pulls back the slider (22).
3. The focusing mechanism with buffer according to claim 1, characterized in that: The invention also comprises a push rod (31), wherein the first end (311) of the push rod (31) enters into a slide groove (221) in the slider (22), and the second end (312) is suitable for connecting to the focus adjusting wire (51); the elastic member (32) is arranged on the first end of the push rod (31), and the end of the elastic member (32) away from the second end (312) is restricted from moving; the slider (22) is provided with a protruding portion (222) protruding into the slide groove (221); when the slider (22) moves along a first direction, the protruding portion (222) pushes the free end of the elastic member (32) to drive the push rod (31) and the focus adjusting wire (51) to move along the first direction.
4. The focusing mechanism with buffer according to claim 3, characterized in that: A limiting sleeve (33) is mounted on the first end (311), and the elastic member (32) is pre-compressed and disposed between the limiting sleeve (33) and the protruding portion (222).
5. The focusing mechanism with buffer according to claim 3, characterized in that: The second end (312) is provided with a boss (313), and when the slider (22) moves along a second direction opposite to the first direction, the slider (22) abuts against the boss (313).
6. The focusing mechanism with buffer according to claim 5, characterized in that: It also includes a limiting structure (42), which is located in front of the push rod (31) in the second direction to limit the distance that the push rod (31) moves along the second direction when pushed by the slider (22).
7. The focusing mechanism with buffer according to claim 6, characterized in that: It also comprises a limiting structure seat (41), the limiting structure (42) being mounted on the limiting structure seat (41), and the position of the limiting structure (42) on the limiting structure seat (41) being adjustable.
8. The focusing mechanism with buffer according to claim 7, characterized in that: The invention also comprises a guide tube (53), wherein the guide tube (53) is fixedly sleeved on the outside of the protection tube (52), and the protection tube (52) is fixed on the outside of the focusing steel wire (51). A guide groove (421) is provided on the limiting structure (42), and the guide tube (53) is inserted into the guide groove (421) with a gap to guide the movement of the focusing steel wire (51).
9. The focusing mechanism with buffer according to claim 8, characterized in that: It also comprises a fastener, which passes through the push rod (31) and is pressed against the protection tube (52) to fix the focusing steel wire (51) and the push rod (31).
10. The focusing mechanism with buffer according to any one of claims 1 to 9, characterized in that: It also comprises a base plate (1) and a slider seat (21), wherein the slider seat (21) is fixed on the base plate (1), and a slider groove for slidably accommodating the slider (22) is provided in the slider seat (21); and / or, It also includes a zoom lever (61), a first rotating seat (62), a second rotating seat (63), a crank (64), and a connecting rod (65), wherein the zoom lever (61) is fixedly connected to the first rotating seat (62), the first rotating seat (62) and the second rotating seat (63) are fixedly connected coaxially, the crank (64) is fixedly mounted on the second rotating seat (63), and one end of the connecting rod (65) is hinged to the crank (64), and the other end is hinged to the slider (22).
11. An endoscope, characterized in that: The invention comprises a focusing mechanism with a buffer as described in any one of claims 1 to 9.