Bending control structure and electron mirror

Abstract

The utility model provides a bend control structure and electron mirror relates to endoscope technical field, bend control structure includes shell, runner, binding post and deflector rod, runner includes pull wire mounting disc, pull wire mounting disc is rotatingly connected in the shell, pull wire mounting disc top surface is integratedly molded with rotating shaft and a plurality of fixed groove, pull wire mounting disc top surface is equipped with pull wire mounting disc top surface, pull wire mounting disc bottom surface is equipped with pull wire mounting disc top surface. The binding post is connected in the fixing groove; the rotating shaft penetrates through the top of the shell and is connected with a shifting rod outside the shell, or the shifting rod penetrates into the shell and is connected with the top end of the rotating shaft, and the shifting rod can drive the rotating wheel to rotate. According to the utility model, the number of parts is reduced, and the assembly complexity and failure rate are reduced.

Description

TECHNICAL FIELD

[0001] The utility model belongs to endoscope technical field, especially related to a bending control structure and electronic mirror. BACKGROUND

[0002] The electronic mirror is one kind of endoscope, which is a comprehensive instrument combining modern electronics, mechanical structure and software control technology, used for deepening into the hole, exploring the internal environment of the hole, especially suitable for detecting the human body. Considering that the working end of the electronic mirror deepens into the hole, it is difficult to control the bending of the working end, and the bending control structure arranged at the outer end of the hole is usually used to control the bending of the working end.

[0003] In one control scheme of the electronic mirror, one end of the traction line is connected with the working end of the electronic mirror, and the other end is connected with the bending control structure of the electronic mirror. By tightening or loosening the traction line through the bending control structure, the effect of controlling the bending of the working end of the electronic mirror is achieved.

[0004] The bending control structure of the conventional electronic mirror has a large number of parts, such as the patent with the authorization announcement number CN215777932U, which includes a rotating wheel cover and a rotating wheel disc connected by screws. The rotating wheel structure mentioned in this patent has a large number of parts and a complex structure. The bending control structure of the disposable electronic mirror has poor sealing performance and structural stability, such as the patent with the authorization announcement number CN218899410U, which does not have a sealing function at the connection between the lever and the shell, and cannot meet the low-frequency repeated use of the electronic mirror. How to provide a simple and reliable bending control structure that can be used repeatedly at low frequency is the purpose of our invention. SUMMARY

[0005] In order to solve the defects of the prior art, the utility model provides a bending control structure and an electronic mirror. The problems of the prior art, such as a large number of parts in the bending control structure, a complex structure, or poor sealing performance and structural stability, are solved.

[0006] In the first aspect, the utility model provides a bending control structure.

[0007] The bending control structure comprises a shell, a rotating wheel, a terminal post and a lever. The rotating wheel comprises a traction line mounting disc, which is rotationally connected in the shell. The top surface of the traction line mounting disc is integrally formed with a rotating shaft and a plurality of fixing grooves. The terminal post is connected in the fixing grooves. The rotating shaft penetrates through the top of the shell and is connected with the lever outside the shell, or the lever penetrates into the shell and is connected with the top end of the rotating shaft. The lever can drive the rotating wheel to rotate.

[0008] The bending control structure, the top surface of the traction line mounting disc is integrally formed with a rotating shaft and a plurality of fixing grooves.

[0009] The top surface of the traction line mounting disc is integrally formed with a rotating shaft and a plurality of fixing grooves, and as a specific scheme, the rotating shaft is located at the center of the traction line mounting disc, and the plurality of fixing grooves are arranged around the rotating shaft.

[0010] As a specific scheme, the connecting post is connected in different fixing grooves to adjust the position of the connecting post, that is, to adjust the tightness of the traction line.

[0011] As a specific scheme, one end of the shifting rod is connected with a connecting column, and the connecting column is connected with the top surface of the traction line mounting disc in the shell.

[0012] In the bending control structure, the rotating wheel and the shell are in sealing contact, or the shifting rod and the shell are in sealing contact.

[0013] The sealing contact refers to the sealing effect achieved after the contact connection of two components, and the waterproof and dustproof effect is achieved.

[0014] The sealing contact between the rotating wheel and the shell means that the rotating wheel and the shell can be directly in sealing contact, or the sealing contact can be achieved through an intermediate connecting piece.

[0015] In the bending control structure, the rotating shaft is sleeved with a first sealing ring and a second sealing ring, the first sealing ring is located between the outer wall of the shell and the shifting rod, and the second sealing ring is in sealing contact with the inner wall of the top of the shell.

[0016] The utility model discloses a bending control structure, the pivot is provided with the first sealing ring, the first sealing ring is located between the shell outer wall and the lever, the pivot upper segment is equipped with the shaft shoulder, the pivot upper segment is provided with the second sealing ring, the second sealing ring is located between the shell inner wall and the shaft shoulder, the pivot is provided with the sealing element and the first bearing, the bottom surface of sealing element is equipped with the first recess, the first bearing is arranged in the first recess, and the bottom surface of first bearing and the shaft shoulder contact connection, the top surface of sealing element is equipped with the second recess, the second sealing ring is installed in the second recess, and the top surface of second sealing ring and shell inner wall sealed contact.

[0017] The pivot upper segment is equipped with the shaft shoulder, as a kind of specific scheme, pivot and shaft shoulder are integrally formed, further for pivot and shaft shoulder are integrally formed by injection molding.

[0018] The utility model discloses a bending control structure, the bottom surface of traction line mounting disc is integrally formed with base, the edge of base bottom surface is equipped with the first protruding of arc, the arc-shaped second protruding is equipped on the shell bottom inner wall, the second protruding and first protruding are on the same circumference, and the arc length sum of first protruding and second protruding is less than the circumference length of arc-shaped second protruding circumference, and the both ends of second protruding are connected with the limiting protruding.

[0019] As a kind of specific scheme, the bottom surface of traction line mounting disc is integrally formed with base, and pivot is integrally formed on traction line mounting disc, fixed groove is integrally formed on traction line mounting disc, so that the whole rotating wheel can be made by injection molding once, without secondary processing rotating wheel, reduce manufacturing cost.

[0020] As a kind of specific scheme, the first protruding of base bottom surface is integrally formed with base, and the second protruding on the shell bottom inner wall and the limiting protruding are integrally formed on the shell. Further, the total arc length of first protruding and second protruding is 1 / 2-2 / 3 of the circumference length of the circumference where first protruding and second protruding are located, which further optimizes the bending angle of working end, and the maximum rotation angle of lever can be accurately controlled by designing the size and position of protrusion. When lever rotates to the extreme position of front end and rear end, the one-way bending angle of working end is about 200°, which can accurately control the maximum angle of working end bending, so as to avoid the damage of electronic mirror structure or the discomfort of patient caused by excessive bending of electronic mirror.

[0021] As a kind of specific scheme, the limiting protruding connected to the both ends of second protruding extends towards the outside, and the outside refers to the side away from the center of arc-shaped second protruding.

[0022] The third protrusion is connected to the bottom surface of the base, the third protrusion is integrally formed on the bottom surface of the base.

[0023] As a specific scheme, the third protrusion connected to the bottom surface of the base is integrally formed on the bottom surface of the base.

[0024] As a specific scheme, the height of the first protrusion on the bottom surface of the base, the third protrusion on the bottom surface of the base and the second protrusion on the inner wall of the bottom of the shell is the same, which facilitates mold opening during injection molding and provides a suitable third sealing ring. Further, the third sealing ring is an O-ring with a height (thickness) of 2.5-4mm, the height of the first protrusion, the second protrusion and the third protrusion is 1.5-3mm, and the third sealing ring protrudes the third protrusion by about 1mm after being connected, and the third sealing ring is compressed after the rotating wheel is connected to the shell, forming a frictional damping structure.

[0025] In the bending control structure, a stand is arranged on the inner wall of the bottom of the shell, and the stand is located at the center of the circumferences of the first protrusion and the second protrusion; a coaxial center groove and a stepped groove are arranged on the bottom surface of the base, the base is inserted into the stand through the center groove, and a second bearing is arranged in the stepped groove and sleeved on the stand.

[0026] Preferably, the stand on the inner wall of the bottom of the shell is integrally formed on the shell.

[0027] In the bending control structure, a wire slot is arranged on the side wall of the traction line mounting disc, a notch is arranged on the top surface of the traction line mounting disc and communicates with the wire slot, and the wire slot communicates with all the fixing slots through the notch; two symmetrical groove body devices are arranged on the top surface of the traction line mounting disc, and the end portions of the two groove body devices communicate with each other; each groove body device comprises a plurality of fixing slots, and every two adjacent fixing slots in each groove body device communicate with each other; the terminal post is inserted or clamped in the fixing slot; the fixing slot has a plurality of clamping surfaces, and the outer circumferential surface of the terminal post is in contact with the clamping surfaces; and a wire hole is arranged on the side wall of the terminal post.

[0028] Preferably, only one wire slot is arranged on the side wall of the traction line mounting disc, and compared with the form of multiple wire slots, the present scheme is simpler. One wire slot is arranged on the side wall of the traction line mounting disc, two traction lines enter the wire slot from both sides of the wire slot and enter the groove body device from the notch communicating with the wire slot, and the terminal post can be connected to different fixing slots in the groove body device.

[0029] Preferably, the plug-in or clamping of the terminal post in the fixing groove can facilitate the insertion and extraction of the terminal post, and compared with the scheme of screw connection, the scheme has higher assembly efficiency and is more convenient for adjusting the tightness of the traction line.

[0030] Preferably, each groove device comprises a plurality of fixing grooves, and adjacent fixing grooves are directly communicated, and there is no other connecting groove body, so that the top surface of the traction line mounting disc has more fixing grooves, and the subsequent adjustment of the tightness of the traction line is facilitated.

[0031] Preferably, the fixing groove has a plurality of clamping surfaces, the clamping surfaces are provided in two groups, the two groups of clamping surfaces are oppositely arranged, each group comprises two clamping surfaces of about 80-100 degrees, that is, a total of four clamping surfaces, and the four clamping surfaces are used for fixing the terminal post. The terminal post can be square or circular.

[0032] The bending control structure comprises a housing, a rotating wheel and a driving rod, the housing comprises an upper housing and a lower housing connected with each other, the top end of the rotating wheel penetrates through the top of the upper housing and is connected with the driving rod outside the housing, the bottom of the lower housing is provided with a stand, the rotating wheel is inserted into the stand of the lower housing through the central groove in the bottom, and the rotating wheel can rotate around the stand as the axis, the lower housing is internally provided with an arc-shaped second protrusion, the edge of the bottom surface of the rotating wheel is provided with an arc-shaped first protrusion, the second protrusion and the first protrusion are on the same circumference, and the sum of the arc lengths of the first protrusion and the second protrusion is less than the circumference of the circumference where the first protrusion and the second protrusion are located, the bottom surface of the rotating wheel is connected with a ring-shaped third protrusion, the third protrusion is coaxial with the first protrusion, the outer periphery of the third protrusion is sleeved with a third sealing ring, and the outer periphery of the third sealing ring abuts against the first protrusion.

[0033] In the second aspect, the utility model provides an electronic mirror, and the electronic mirror has the above-mentioned bending control structure.

[0034] Beneficial effects:

[0035] The utility model discloses a traction line mounting disc, which is integrally formed with a rotating shaft and a fixing groove, integrates the cable fixing module, the transmission wheel group and other functions in the traditional scheme into a single rotating part, reduces the number of parts and improves the stability of the rotating wheel structure; the rotating shaft is directly connected with the driving rod, and the traditional worm gear or multi-stage gear transmission is abandoned, so that the number of parts is reduced.

[0036] The utility model adopts a rotating wheel structure, which is simple in structure and reduces the assembly complexity and failure rate of the rotating wheel structure; the straight insertion type cooperation design of the fixing groove and the terminal post replaces the traditional screw fixing and other complex connection modes, thereby reducing the assembly complexity.

[0037] The utility model discloses a sealing contact between the rotating wheel and the shell, or a sealing contact between the lever and the shell, or a sealing contact between the rotating wheel and the shell at the same time, and a sealing contact between the lever and the shell; this design effectively prevents cleaning liquid or disinfectant from penetrating into the shell through the connecting part of the rotating wheel, the lever and the shell, so that the bending control structure can satisfy about 20 times of immersion sterilization and disinfection, and the requirement of low-frequency repeated use of the endoscope is satisfied. BRIEF DESCRIPTION OF DRAWINGS

[0038] Figure 1 It is the structure schematic diagram of the installation and fixation of the bending control structure of the utility model.

[0039] Figure 2 It is the disassembly schematic diagram of the bending control of the utility model.

[0040] Figure 3 It is the structure schematic diagram of the rotating wheel in the bending control of the utility model.

[0041] Figure 4 It is the structure schematic diagram of the bottom of the shell in the bending control of the utility model.

[0042] Figure 5 It is the structure schematic diagram of the rotating wheel and the terminal post in the bending control of the utility model.

[0043] Figure 6 It is the structure schematic diagram of the surface of the traction line mounting disc in the bending control of the utility model.

[0044] Wherein, 1, shell;101, upper shell;102, lower shell;1021, limit protruding;1022, second protruding;1023, stand column;2, rotating wheel;201, traction line mounting disc;2011, fixed groove;2012, notch;2013, wire slot;202, rotating shaft;2021, shaft shoulder;203, base;2031, first protruding;2032, second bearing;2033, center recess;2034, step groove;2035, third protruding;3, terminal post;301, terminal hole;4, lever;5, first sealing ring;6, second sealing ring;7, sealing element;701, first bearing;8, third sealing ring;9, traction line. DETAILED DESCRIPTION

[0045] The utility model will be further explained in connection with the drawings.

[0046] In the description of the utility model, need understanding, if there are terms '' above '' '' below '' '' left '' '' right '' '' top '' '' bottom '' '' inside '' '' outside '' etc. Indicated orientation or position relation is based on the orientation or position relation shown in the drawing, only for the convenience of describing the utility model and simplifying the description, and not indicate or imply the device or element referred to must have a particular orientation, with a particular orientation structure and operation, therefore the position relation of the word in the drawing is only used for example description, can not be understood as the limitation of this patent.

[0047] The utility model aims at providing a kind of bending control structure, the structure basically does not need machining parts, only using common standard parts and mold injection parts, simple and reliable, can effectively reduce the cost of low frequency repetitive use electronic mirror.

[0048] Example 1

[0049] As Figure 1 And Figure 2 As shown in the embodiment, a kind of bending control structure is provided, including shell 1, runner 2, terminal post 3 and lever 4, runner 2 includes traction line mounting disc 201, traction line mounting disc 201 is rotatably connected in shell 1, the top surface of traction line mounting disc 201 integrally forms shaft 202 and several fixed slots 2011, terminal post 3 is connected in fixed slot 2011;Shaft 202 passes through the top of shell 1, and is connected with lever 4 outside shell 1, or lever 4 is inserted into shell 1, and is connected with the top end of shaft 202, lever 4 can drive runner 2 to rotate.

[0050] When needing to control bending, lever 4 is actuated to drive runner 2 to rotate. When runner 2 rotates, it will drive the working end to bend through the traction line connected between terminal post 3 and the working end of electronic mirror. In the embodiment, runner 2 integrates traction line mounting disc 201 and fixed slot 2011, which integrates the functions of scattered cable fixing module, transmission wheel group and other functions in traditional scheme into a single rotating component, reducing the number of parts;Shaft 202 and lever 4 are directly connected, abandoning traditional worm gear or multi-stage gear transmission, reducing the number of parts, reducing assembly complexity and failure rate.

[0051] In the embodiment, terminal post 3 is clamped or inserted in fixed slot 2011, and the assembly method is simple. When assembling, terminal post 3 is directly placed in different fixed slots to adjust the tension of traction line, without complicated adjustment process, shortening the assembly time of bending control structure.

[0052] In the embodiment, sealed contact can be used between runner 2 and shell 1, or between lever 4 and shell 1, or both.

[0053] The rotating wheel 2 and the housing 1 are in a sealed contact state, which effectively prevents the cleaning liquid or disinfectant from seeping into the interior of the housing 1 through the connection between the rotating wheel 2, the lever 4 and the housing 1. This allows the bending control structure to meet the requirements of approximately 20 immersion sterilizations, thus satisfying the requirements of low-frequency repetitive use of the electron microscope.

[0054] Specifically, such as Figures 1 to 2 As shown, the device includes a housing 1, a rotating wheel 2, a terminal block 3, and a lever 4. The housing 1 comprises an upper housing 101 and a lower housing 102, which are joined together and fixed with screws to form the housing 1. The screw-fixed upper housing 101 and lower housing 102 are tightly connected, ensuring the damping effect of the O-ring remains effective. The lower housing 102 has a second protrusion 1022 at its bottom and a pillar 1023 in the center of its bottom.

[0055] The rotating wheel 2 is installed inside the housing 1. The rotating wheel 2 includes a rotating shaft 202, a traction line mounting plate 201 located on the rotating shaft 202, and a base 203 at the lower end of the rotating shaft 202.

[0056] The surface of the traction line mounting plate 201 is provided with several fixing grooves 2011, and the terminal block 3 is inserted into the fixing groove 2011. The top surface of the traction line mounting plate 201 is provided with a notch 2012 and a wire groove 2013 surrounding the side wall. The notch 2012, the wire groove 2013 are connected to the interior of all the fixing grooves 2011. The side wall of the terminal block 3 is provided with a through wiring hole 301.

[0057] The top end of the rotating shaft 202 passes through the top of the upper housing 101 and is connected to the lever 4 outside the housing 1. The lever 4 can drive the rotating wheel 2 to rotate as a whole through the rotating shaft 202. The rotating shaft 202 and the upper housing 101 are in a sealed contact state.

[0058] The lower edge of the base 203 has an arc-shaped first protrusion 2031; the bottom of the base 203 has a central groove 2033, through which the base 203 is inserted into the column 1023 and connected to the bottom of the lower housing 102, and the rotating wheel 2 can rotate around the column 1023 as an axis. A second bearing 2032 is also provided inside the groove, and the second bearing 2032 is sleeved on the column 1023.

[0059] As a specific sealing solution:

[0060] like Figure 1 and Figure 2 As shown, a first sealing ring 5 is fitted on the rotating shaft 202 outside the housing 1. The first sealing ring 5 is located between the outer wall of the upper housing 101 and the lever 4.

[0061] Inside the shell 1, the upper section of the rotating shaft 202 is integrally formed with a shaft shoulder 2021, and the shaft shoulder 2021 is sleeved with a sealing element 7 and a second sealing ring 6. Further, the sealing element 7 is made of hard plastic material, and the top surface (the contact surface between the sealing element 7 and the shell 1) is made of soft plastic or rubber material, which can achieve better sealing effect. The top surface of the sealing element 7 is provided with a second groove, and the second sealing ring 6 is installed in the second groove and in contact with the inner wall of the upper shell 101. The bottom of the sealing element 7 is provided with a first groove, and the first groove is internally provided with a first bearing 701, and the first bearing 701 is sleeved on the rotating shaft 202.

[0062] In the present embodiment, at least one of the first sealing ring 5, the second sealing ring 6 and the sealing element 7 exists, and the first sealing ring 5 and the second sealing ring 6 are both O-shaped sealing rings. Through experiments, when only the first sealing ring 5 exists, the contact sealing between the rotating wheel 2 and the shell 1 can meet 4-6 times of immersion sterilization and disinfection; when only the second sealing ring 6 exists, the contact sealing between the rotating wheel 2 and the shell 1 can meet 4-6 times of immersion sterilization and disinfection; when only the sealing element 7 exists, the contact sealing between the rotating wheel 2 and the shell 1 can meet 8-10 times of immersion sterilization and disinfection. When the first sealing ring 5 and the second sealing ring 6 are used at the same time, the contact sealing between the rotating wheel 2 and the shell 1 can meet 12-15 times of immersion sterilization and disinfection; when the first sealing ring 5 and the sealing element 7 are used at the same time, the contact sealing between the rotating wheel 2 and the shell 1 can meet 15-18 times of immersion sterilization and disinfection; when the second sealing ring 6 and the sealing element 7 are used at the same time, the contact sealing between the rotating wheel 2 and the shell 1 can meet 11-14 times of immersion sterilization and disinfection; when the first sealing ring 5, the second sealing ring 6 and the sealing element 7 are used at the same time, the contact sealing between the rotating wheel 2 and the shell 1 can meet more than 30 times of immersion sterilization and disinfection, so the effect is better when the first sealing ring 5, the second sealing ring 6 and the sealing element 7 are used at the same time.

[0063] As a specific scheme for limiting:

[0064] As shown in Figures 2 to 4 , the first protrusion 2031 at the lower end of the base 203 cooperates with the second protrusion 1022 at the bottom of the lower shell 102 to form a rotating limiting mechanism, and the first protrusion 2031 can abut against the second protrusion 1022 when the rotating wheel 2 rotates by a certain angle, thereby limiting the rotating angle of the rotating wheel 2.

[0065] In the above structure, the first bearing 701 and the second bearing 2032 are arranged to enable the rotating wheel 2 to rotate more smoothly. The O-shaped ring is deformed by extrusion, so that the rotating wheel 2 and the lever 4 can be self-locked. At the same time, the sealing of the first sealing ring 5, the second sealing ring 6 and the sealing element 7 ensures the reliability of the sealing performance, and any two of the first sealing ring 5, the second sealing ring 6 and the sealing element 7 can be appropriately removed.

[0066] In summary, the embodiment adopts a rotating wheel with a specific structure, and the bottom of the rotating wheel and the inner wall of the bottom of the shell are matched through a limiting mechanism. On the one hand, the O-shaped ring can be accommodated to prevent the O-shaped ring from being separated, and on the other hand, the rotation angle can be limited. In addition, the O-shaped ring provides sealing while playing a damping role to achieve self-locking after the rotating wheel rotates. The rotating and rotating sealing structure of the embodiment has high steel traction line connection efficiency, high rotating wheel part assembly efficiency, and is simple and reliable.

[0067] Embodiment 2

[0068] The embodiment is a further description of the bending control structure provided in Embodiment 1, and the repeated parts of the embodiment will not be described.

[0069] In the embodiment, as shown in Figures 2 to 4 the bottom surface of the traction line mounting disc 201 is connected with a base 203, the edge of the bottom surface of the base 203 is provided with an arc-shaped first protrusion 2031, the inner wall of the bottom of the shell 1 is provided with an arc-shaped second protrusion 1022, the second protrusion 1022 and the first protrusion 2031 are on the same circumference, and the arc length sum of the first protrusion 2031 and the second protrusion 1022 is less than the circumference of the circumference where the first protrusion 2031 and the second protrusion 1022 are located.

[0070] In the embodiment, the second protrusion 1022 and the first protrusion 2031 are arranged on the same circumference, and the arc length sum of the first protrusion 2031 and the second protrusion 1022 is less than the circumference of the circumference where the first protrusion 2031 and the second protrusion 1022 are located. This scheme forms a bending limiting structure.

[0071] In the initial state, the lever is in the middle position. When in use, the control lever 4 is rotated clockwise to drive the working end of the electronic mirror to bend in the first direction. During the rotation of the control lever 4, the first protrusion 2031 on the bottom surface of the base 203 moves with the rotating wheel 2. When the control lever 4 is rotated clockwise by a certain angle, the first end of the first protrusion 2031 and the first end of the second protrusion 1022 are in contact, and the second protrusion 1022 limits the continuous rotation of the rotating wheel 2, so that the control lever 4 cannot be rotated, thereby realizing the bending limiting of the working end of the electronic mirror. The control lever 4 is rotated counterclockwise to the middle position, at which time the working end of the electronic mirror is reset. The control lever 4 is continuously rotated counterclockwise to drive the working end of the electronic mirror to bend in the second direction. During the rotation of the control lever 4, the first protrusion 2031 on the bottom surface of the base 203 moves with the rotating wheel 2. When the control lever 4 is rotated counterclockwise by a certain angle, the second end of the first protrusion 2031 and the second end of the second protrusion 1022 are in contact, and the second protrusion 1022 limits the continuous rotation of the rotating wheel 2, so that the control lever 4 cannot be rotated, thereby realizing the bending limiting of the working end of the electronic mirror.

[0072] The first protrusion 2031 and the second protrusion 1022 are mechanically limited on the same circumference, without the need for complex electronic components or ratchet, tab and other limiting structures, reducing the number of parts and the difficulty of assembly. The physical contact of the protrusions forms a limit, avoiding the potential failure risk of sensors or software control, with high reliability. Through the bidirectional limiting design of clockwise and counterclockwise rotation, the working end of the electronic mirror can realize bending control in two directions. The two ends of the first protrusion and the second protrusion are in contact, respectively, to ensure that the rotation range in both directions is accurately limited, improving the flexibility and safety of operation.

[0073] Further, the first protrusion 2031 and the second protrusion 1022 are oppositely arranged, and the distance between the two ends of the first protrusion 2031 and the two ends of the second protrusion 1022 is equal. This design can optimize the bending control, so that the bending angles of the working end of the electronic mirror to both ends are the same. Further, the total arc length of the first protrusion 2031 and the second protrusion 1022 is 1 / 2-2 / 3 of the circumference length of the first protrusion 2031 and the second protrusion 1022. This design further optimizes the bending angle of the working end. By designing the size and position of the protrusion, the maximum rotation angle of the lever can be accurately controlled. When the lever rotates to the front and rear end limit positions, the one-way bending angle of the working end is about 200°. This design can accurately control the maximum rotation angle of the working end, thereby avoiding the damage of the electronic mirror structure or the discomfort of the patient caused by excessive bending of the working end of the electronic mirror.

[0074] Further, as shown in Figure 4 The two ends of the second protrusion 1022 are connected with outwardly extending limiting protrusions 1021. The outwardly extending limiting protrusions 1021 are away from the center of the second protrusion 1022. The outwardly extending limiting protrusions 1021 can effectively block the first protrusion 2031, ensuring the limiting effect of the first protrusion 2031 and preventing the first protrusion 2031 from disengaging from the limit to cause damage to the working end.

[0075] In a further embodiment, the bottom surface of the base 203 is connected with a ring-shaped third protrusion 2035, and the third protrusion 2035 is coaxial with the first protrusion 2031. The third protrusion 2035 is sleeved with a third sealing ring 8, and the outer periphery of the third sealing ring 8 abuts against the first protrusion 2031.

[0076] In the embodiment, the third protrusion 2035 is coaxially arranged with the first protrusion 2031, forming an annular gap space. The third sealing ring 8 is mounted on the outer periphery of the third protrusion 2035 and is in close contact with the inner wall of the first protrusion 2031 through radial compression. Further, the height of the third sealing ring 8 is greater than the height of the third protrusion 2035, the first protrusion 2031 and the second protrusion 1022, which can be the same or different. This design makes the top surface of the third sealing ring 8 contact the bottom surface of the base 203, and the bottom surface of the third sealing ring 8 contact the shell, so that the third sealing ring 8 plays a damping role. When the lever 4 drives the rotating wheel 2 to rotate by a certain angle, the damping effect of the third sealing ring 8 and the damping effect of the first sealing ring 5 cooperate to prevent the position of the rotating wheel 2 from changing under the action of external force, thereby achieving self-locking of the working end of the electronic mirror. In the embodiment, the self-locking of the rotating wheel 2 is achieved by cooperation of the third sealing ring 8 and the first sealing ring 5, that is, the self-locking of the working end of the electronic mirror is achieved, and the structure is simple.

[0077] It is worth noting that the third sealing ring 8 of the embodiment does not need to be provided with an additional fixing structure, and the outer ring of the third sealing ring 8 and the curved limiting structure share the first protrusion 2031 and the second protrusion 1022. The third protrusion 2035 of the inner ring of the third sealing ring 8 is a structure for realizing the rotating function of the rotating wheel 2. This design is simple and reliable, and reduces the number of parts of the curved control structure.

[0078] In a further embodiment, the structure for realizing the rotating function of the rotating wheel 2 includes a stand 1023 provided on the inner wall of the bottom of the shell 1, and the stand 1023 is located at the center of the circumference where the first protrusion 2031 and the second protrusion 1022 are located. The bottom surface of the base 203 is provided with a coaxial center groove 2033 and a stepped groove 2034, the base 203 is inserted into the stand 1023 through the center groove 2033, and the second bearing 2032 is arranged in the stepped groove 2034 and is sleeved on the stand 1023.

[0079] In the embodiment, the stand 1023 is located at the center of the circumference where the first protrusion 2031 and the second protrusion 1022 are located, serving as the rotation center reference axis of the rotating wheel 2. The center groove 2033 of the base 203 is precisely sleeved on the stand 1023, ensuring that the rotation axis of the rotating wheel 2 coincides with the stand 1023, and eliminating the rotation imbalance caused by assembly eccentricity. The inner ring of the second bearing 2032 is fixed on the base 203 through the stepped groove 2034, and the inner ring of the second bearing 2032 is in contact with the stand 1023, forming a radial support and bearing the radial load of the rotating wheel 2, thereby reducing the rotation resistance and ensuring smooth rotation of the rotating wheel 2. The design of the stepped groove 2034 can limit the axial displacement of the second bearing 2032 and prevent the second bearing 2032 from failing.

[0080] In one embodiment, the base 203 is integrally formed on the bottom surface of the traction line mounting disc 201, and the third protrusion 2035 is integrally formed on the bottom surface of the base 203; the limiting protrusion 1021 and the second protrusion 1022 are integrally formed. Through this design, the production process of the runner 2 and the shell is simplified, the runner 2 is manufactured by one-piece injection molding, which is simple and has low production cost.

[0081] Embodiment 3

[0082] This embodiment is a further description of the bending control structure provided in Embodiment 1 and Embodiment 2, and the repeated parts of this embodiment will not be described.

[0083] As shown in Figure 5 and Figure 6 In this embodiment, the side wall of the traction line mounting disc 201 is provided with a wire slot 2013, and the top surface of the traction line mounting disc 201 is provided with a notch 2012 communicating with the wire slot 2013; the wire slot 2013 is communicated with all the fixed slots 2011 through the notch 2012; the side wall of the terminal post 3 is provided with a through terminal hole 301.

[0084] In use, the traction line 9 enters from the side wall wire slot 2013 of the traction line mounting disc 201 and extends along the annular wire slot, ensuring the limiting of the traction line. The traction line 9 enters the fixed slot 2011 from the wire slot 2013 through the top surface notch 2012, and the notch 2012 serves as a bridge to achieve smooth connection between the wire slot 2013 and the fixed slot 2011, avoiding excessive bending of the cable which may cause wear.

[0085] The side wall of the terminal post 3 is provided with a through terminal hole 301, and the traction line 9 passes through the terminal hole 301 of the terminal post 3 to achieve quick fixation of the traction line 9. During installation, the terminal post 3 is clamped in the fixed slot 2011 to achieve quick installation of the terminal post 3.

[0086] In a further embodiment, the top surface of the traction line mounting disc 201 is provided with two groups of symmetrical groove devices, and the end portions of the two groove devices are communicated; each groove device includes a plurality of fixed slots 2011, and adjacent two fixed slots 2011 in each groove device are communicated; the fixed slot 2011 has a plurality of clamping surfaces, and the terminal post 3 is clamped between the plurality of clamping surfaces.

[0087] Further, the clamping surfaces have two groups, and the two groups of clamping surfaces are oppositely arranged, each group including two clamping surfaces of about 80-100°, i.e. a total of four clamping surfaces, and the four clamping surfaces are used to fix the terminal post. The terminal post can be square or circular. By clamping the terminal post 3 between the plurality of clamping surfaces, the position of the terminal post can be adjusted.

[0088] In the embodiment, the two groups of groove bodies are in communication at the ends, allowing the traction line to transition between the symmetric regions and simplifying the wiring of the complex system. The adjacent fixed grooves 2011 in the single groove body device are in direct communication, and the traction line can be continuously extended along the fixed grooves 2011, so that the terminal post 3 can be clamped in any fixed groove 2011. The terminal post 3 is clamped between the multiple clamping surfaces of the fixed groove 2011, and the fixation effect of the terminal post 3 is ensured through the multiple surface contact, preventing the terminal post 3 from coming off the fixed groove 2011.

[0089] In the embodiment, the connection of the traction line can be optimized through the symmetrically arranged groove body device. Two traction lines are provided through two terminal posts in the embodiment, allowing the working end to realize rotation in two directions. The bending control structure of the embodiment is for an electronic mirror with two-direction bending of the working end, and is not applicable to an electronic mirror with four-direction bending of the working end.

[0090] It is worth noting that the rotating wheel 2 structure of the embodiment is integrally injection molded, which saves the production cost of the rotating wheel. Specifically, the traction line mounting disc 201, the rotating shaft 202, and the base 203 in the rotating wheel 2 are integrally injection molded. Further, the fixed grooves 2011, the notches 2012, and the wire grooves 2013 in the traction line mounting disc 201 are integrally injection molded. The shaft shoulder 2021 on the rotating shaft 202 is integrally injection molded, and the first protrusion 2031, the central groove 2033, the stepped groove 2034, and the third protrusion on the base 203 are integrally injection molded.

[0091] Embodiment 4

[0092] Based on the bending control structure of any one of Embodiments 1 to 3, the embodiment provides an assembly method of the bending control structure.

[0093] The difficulty in assembling the bending control structure lies in the adjustment of the tightness of the traction line. As a power transmission member, the traction line is connected between the working end and the rotating wheel, and the rotating wheel 2 rotates to drive the working end to bend through the traction line. Therefore, after the traction line is installed, on the one hand, the traction line needs to be tensioned, and on the other hand, the working end of the electronic mirror cannot be bent. In the conventional method, the tightness of the traction line needs to be repeatedly adjusted to complete the installation of the traction line, which is time-consuming and laborious.

[0094] The assembly method of the bending control structure of the embodiment includes the following steps:

[0095] The first end of the traction line is connected to the working end of the electronic mirror, and the second end passes through the terminal hole 301 of the terminal post 3. A steel pipe is sleeved on the second end of the traction line, and the steel pipe is welded on the second end of the traction line. In this step, the inner diameter of the steel pipe is greater than the inner diameter of the terminal hole 301, and the outer diameter of the steel pipe is greater than the outer diameter of the terminal hole 301. The steel pipe and the second end of the traction line are welded by glue or soldering, which can ensure that the welded steel pipe and the traction line cannot pass through the terminal hole 301.

[0096] The rotating wheel 2 is rotationally connected in the housing 1.

[0097] The terminal 3 is installed in one of the fixed slots 2011 of the traction line mounting disc 201, and the rotating wheel 2 is rotated to determine whether the terminal 3 is installed correctly. The method for determining whether the terminal 3 is installed correctly is as follows: the rotating wheel 2 is rotated, and if the working end of the electronic mirror bends following the rotation of the rotating wheel 2, the terminal 3 is installed correctly; otherwise, the terminal 3 is not installed correctly.

[0098] If the terminal 3 is installed correctly, the terminal 3 is fixed in the fixed slot 2011 by glue, and if the terminal 3 is not installed correctly, the terminal 3 is adjusted to a different fixed slot 2011 until the terminal 3 is installed correctly.

[0099] In the embodiment, the adjustment of the tightness of the traction line is achieved by adjusting the position of the terminal 3, the terminal 3 can be directly disassembled in the form of plugging and unplugging during the position replacement, the correctness of the installation of the terminal is quickly determined through the objective feedback of the rotation of the rotating wheel and the response of the working end, and the dependence on the skills of the operator is reduced. The embodiment avoids the repeated trial-and-error adjustment of the tightness in the traditional method, and the working hours are reduced by more than 50%.

[0100] In a further embodiment, the connection of the traction line can be optimized by the symmetrically arranged slot body device. Specifically, two traction lines with the same length are taken, the connection of the first traction line is completed by using the above method, the terminal 3 of the second traction line is installed in the fixed slot 2011 symmetric to the terminal 3 of the first traction line, and the connection of the second traction line can be quickly achieved.

[0101] In an embodiment, the assembly method of the bending control structure can include the following steps:

[0102] One end of the traction line 9 is fixed to the working end of the electronic mirror, the other end of the traction line 9 passes through the terminal hole 301 of the terminal 3, and the end of the through hole part of the traction line is inserted into the steel pipe and fixed by soldering.

[0103] The second bearing 2032 is sleeved on the column 1023, the third sealing ring 8 is sleeved on the lower end of the base 203, and then the rotating wheel 2 is placed on the column 1023 of the lower housing 102 through the groove at the bottom of the base 203.

[0104] After the traction line with the terminal 3 passes through the line slot 2013 on the side of the traction line mounting disc 201, the appropriate fixed slot 2011 is selected according to the tightness of the traction line 9, and the terminal 3 is installed in the correct fixed slot 2011.

[0105] The first bearing 701 and the sealing member 7 are installed, the second sealing ring 6 is installed, the upper housing 101 is closed, and the upper housing 101 and the lower housing 102 are tightened by screws.

[0106] The part of the rotating shaft 202 exposed to the upper shell 101 is sleeved with the first sealing ring 5, and the rotating rod 4 is screwed on the rotating shaft 202 by means of screws.

[0107] Embodiment 5

[0108] The electronic mirror provided in the embodiment adopts the bending control structure of any one of the embodiments 1 to 3, and can adopt the assembling method provided in the embodiment 4 when assembled.

[0109] The pipe has shown and described the embodiments of the present application, and for those skilled in the art, it can be understood that various changes, modifications, replacements and variations can be made to these embodiments without departing from the principles and spirits of the present application, and the scope of the present application is defined by the appended claims and their equivalents.

Claims

1. A bending control structure, characterized in that, The device includes a housing (1), a rotating wheel (2), a terminal block (3), and a lever (4). The rotating wheel (2) includes a traction wire mounting plate (201), which is rotatably connected inside the housing (1). The top surface of the traction wire mounting plate (201) is integrally formed with a rotating shaft (202) and several fixing grooves (2011). The terminal block (3) is connected in the fixing grooves (2011). The rotating shaft (202) passes through the top of the housing (1) and is connected to the lever (4) outside the housing (1), or the lever (4) passes into the housing (1) and is connected to the top of the rotating shaft (202). The lever (4) can drive the rotating wheel (2) to rotate.

2. The bending control structure according to claim 1, characterized in that, The rotating wheel (2) is in sealed contact with the housing (1), and / or the lever (4) is in sealed contact with the housing (1).

3. The bending control structure according to claim 2, characterized in that, The rotating shaft (202) is fitted with a first sealing ring (5) and a second sealing ring (6). The first sealing ring (5) is located between the outer wall of the housing (1) and the lever (4). The second sealing ring (6) is in sealing contact with the inner wall of the top of the housing (1).

4. The bending control structure according to claim 2, characterized in that, The rotating shaft (202) is fitted with a first sealing ring (5), which is located between the outer wall of the housing (1) and the lever (4). The upper section of the rotating shaft (202) is provided with a shoulder (2021), and the upper section of the rotating shaft (202) is fitted with a second sealing ring (6), which is located between the inner wall of the housing (1) and the shoulder (2021); The rotating shaft (202) is fitted with a seal (7) and a first bearing (701). The bottom surface of the seal (7) is provided with a first groove, and the first bearing (701) is disposed in the first groove. The bottom surface of the first bearing (701) is in contact with the shaft shoulder (2021). The top surface of the seal (7) is provided with a second groove, the second sealing ring (6) is installed in the second groove, and the top surface of the second sealing ring (6) is in sealing contact with the inner wall of the housing (1).

5. The bending control structure according to claim 1, characterized in that, The bottom surface of the traction line mounting plate (201) is integrally formed with a base (203). The bottom edge of the base (203) is provided with an arc-shaped first protrusion (2031). The inner wall of the bottom of the housing (1) is provided with an arc-shaped second protrusion (1022). The second protrusion (1022) and the first protrusion (2031) are on the same circumference, and the sum of the arc lengths of the first protrusion (2031) and the second protrusion (1022) is less than the circumference of the circle on which the arc-shaped second protrusion (1022) is located. The two ends of the second protrusion (1022) are connected to limit protrusions (1021).

6. The bending control structure according to claim 5, characterized in that, The bottom surface of the base (203) is connected to an annular third protrusion (2035), and the third protrusion (2035) and the first protrusion (2031) are coaxial; The third protrusion (2035) is fitted with a third sealing ring (8) on its outer periphery, and the outer periphery of the third sealing ring (8) abuts against the first protrusion (2031); The height of the third sealing ring (8) is greater than the height of the third protrusion (2035), the height of the first protrusion (2031), and the height of the second protrusion (1022).

7. The bending control structure according to claim 5, characterized in that, The bottom inner wall of the housing (1) is provided with a column (1023), and the column (1023) is located at the center of the circumference of the first protrusion (2031) and the second protrusion (1022); The bottom surface of the base (203) is provided with a coaxial central groove (2033) and a stepped groove (2034). The base (203) is inserted into the column (1023) through the central groove (2033). A second bearing (2032) is provided in the stepped groove (2034), and the second bearing (2032) is sleeved on the column (1023).

8. The bending control structure according to claim 1, characterized in that, The side wall of the traction line mounting plate (201) is provided with a wire groove (2013), and the top surface of the traction line mounting plate (201) is provided with a notch (2012) that communicates with the wire groove (2013). The wire groove (2013) communicates with all the fixing grooves (2011) through the notch (2012). The top surface of the traction line mounting plate (201) is provided with two symmetrical groove devices, and the ends of the two groove devices are connected; each groove device includes multiple fixed grooves (2011), and two adjacent fixed grooves (2011) in each groove device are connected. The terminal block (3) is inserted into or snapped into the fixing groove (2011); the fixing groove (2011) has multiple engaging surfaces, and the outer peripheral surface of the terminal block (3) contacts the engaging surfaces; the side wall of the terminal block (3) is provided with a through wiring hole (301).

9. The bending control structure according to claim 1, characterized in that, The housing (1) includes an upper housing (101) and a lower housing (102) connected to each other. The top end of the rotating wheel (2) passes through the top of the upper housing (101) and is connected to the lever (4) outside the housing (1). The bottom of the lower housing (102) is provided with a column (1023), and the rotating wheel (2) is inserted into the column (1023) of the lower housing (102) through the central groove (2033) at the bottom, and the rotating wheel (2) can rotate around the column (1023) as an axis; The lower housing (102) is provided with an arc-shaped second protrusion (1022), and the bottom edge of the rotating wheel (2) is provided with an arc-shaped first protrusion (2031). The second protrusion (1022) and the first protrusion (2031) are on the same circumference, and the sum of the arc lengths of the first protrusion (2031) and the second protrusion (1022) is less than the circumference of the circumference of the first protrusion (2031) and the second protrusion (1022). The bottom surface of the rotating wheel (2) is connected to an annular third protrusion (2035), and the third protrusion (2035) and the first protrusion (2031) are coaxial; The third protrusion (2035) is fitted with a third sealing ring (8) on its outer periphery, and the outer periphery of the third sealing ring (8) abuts against the first protrusion (2031).

10. An electron microscope, characterized in that, Includes the bending control structure as described in any one of claims 1-9.

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