Four-direction adjusting endoscope

Abstract

The invention provides a four-direction adjusting endoscope which comprises a machine body, a mounting cavity is formed in the middle of the machine body, the four-direction adjusting endoscope further comprises an adjusting mechanism, the adjusting mechanism comprises a hemisphere arranged on the lower portion of the mounting cavity in a limited mode, the outer end of the hemisphere is in transmission connection with a probe part through a set of traction ropes, and an operating rod extending out of the machine body is integrally arranged in the middle of the hemisphere; the locking mechanism comprises a limiting column arranged on the lower portion of the installation cavity, a limiting magnetic block opposite to the hemisphere is arranged on the limiting column in a sliding mode, and an electromagnetic block for controlling the limiting magnetic block to move linearly is arranged at the bottom of the limiting column. Through the locking mechanism, the connecting state of the two conductive blocks is controlled through the thumb pushing the operation rod, then the contact state between the limiting magnetic block and the hemispheroid is controlled, an operator can conveniently control limitation on the hemispheroid with one hand, namely, the direction of the probe part is controlled, and operation is easy and convenient.

Description

Technical Field

[0001] The present invention relates to the field of endoscopes, and more particularly to a four-way adjustable endoscope. Background Art

[0002] Industrial endoscopes are mainly used for automobiles, aero-engines, pipelines, mechanical parts, etc., and can achieve non-destructive testing without disassembling or damaging the assembly and without the equipment stopping operation; currently, the industrial endoscopes on the market mainly adjust the direction of the probe by pushing the operating rod with the hand. Based on two technologies of guide wire traction and snake bone structure, through the traction of several guide wires passing through the probe insertion tube, the operator adjusts the tightness of different wires by pushing the operating rod, thereby controlling the bending of the probe guide joint in different directions and realizing the rotation of the probe in different directions. In the actual application process, when adjusting the direction of the endoscope probe, it is mostly a single-handed operation, that is, the operator holds the handle of the industrial endoscope with one hand, and at the same time uses the thumb of this hand to push the operating rod to adjust the tightness of the corresponding wire to realize the turning of the probe. However, when the probe needs to stay and observe, that is, when the direction of the probe remains static, the operator's hand needs to maintain a hand posture of pushing the operating rod. The operator's hand is easily fatigued, which is inconvenient for the continuous detection process. At the same time, it is easy for the operating rod to loosen due to the tremor of the operator's hand, resulting in a deviation in the probe direction and affecting the observation efficiency. Therefore, we make improvements to this and propose a four-way adjustable endoscope. Summary of the Invention

[0003] The purpose of the present invention is to address the problem that when adjusting the direction of the endoscope probe, it is mostly a single-handed operation, that is, the operator holds the handle of the industrial endoscope with one hand, and at the same time uses the thumb of this hand to push the operating rod to adjust the tightness of the corresponding wire to realize the turning of the probe. However, when the probe needs to stay and observe, that is, when the direction of the probe remains static, the operator's hand needs to maintain a hand posture of pushing the operating rod. The operator's hand is easily fatigued, which is inconvenient for the continuous detection process. At the same time, it is easy for the operating rod to loosen due to the tremor of the operator's hand, resulting in a deviation in the probe direction and affecting the observation efficiency.

[0004] In order to achieve the above-mentioned invention purpose, the present invention provides the following four-way adjustable endoscope to improve the above problems.

[0005] Specifically, this application is as follows: Four-way adjustable endoscope, including a body. The middle part of the body has an installation cavity, and the bottom end of the middle part of the body is a probe head. It also includes an adjustment mechanism for controlling the direction of the probe head, including a hemispherical body limitedly arranged at the lower part of the installation cavity. The outer end of the hemispherical body is connected and driven to the probe head through a set of traction ropes. The middle part of the hemispherical body is integrally provided with an operating rod extending outside the body; and a locking mechanism for limiting the state of the hemispherical body, including a limiting column arranged at the lower part of the installation cavity. The hemispherical body is limited to rotate on the top of the limiting column. A limiting magnetic block opposite to the hemispherical body is slidably arranged on the limiting column. An electromagnetic block for controlling the linear movement of the limiting magnetic block is arranged at the bottom of the limiting column. A pair of parallel connecting plates are slidably arranged on the operating rod. Opposite conductive blocks are respectively arranged on the two connecting plates. A closed circuit is electrically connected through wires among the two conductive blocks, the electromagnetic block and the built-in power supply module of the body. When the two conductive blocks are connected, the electromagnetic block generates a magnetic force to adsorb the limiting magnetic block to move downward to release the restriction on the hemispherical body. A downward pressure control component for controlling the relative movement of the two connecting plates is arranged on the operating rod. The downward pressure control component includes a finger pressure block elastically arranged at the top of the operating rod.

[0006] As a preferred technical solution of the present application, a support plate is detachably installed at the lower part of the installation cavity. A space for the traction rope to pass through and move is left between the support plate and the bottom of the installation cavity. A set of connection holes for the traction rope to pass through are opened on the support plate. The limiting column is detachably installed in the middle of the support plate.

[0007] As a preferred technical solution of the present application, the top end of the limiting column has a first concave arc surface adapted to the hemispherical body. The middle part of the limiting column has a through limiting cavity. The limiting magnetic block is inserted and slidably arranged at the top of the limiting cavity. A first spring is installed between the bottom end of the limiting magnetic block and the inner wall of the limiting cavity. The electromagnetic block is installed at the bottom of the limiting cavity and is located directly below the limiting magnetic block. A wire groove for the wire to pass through is opened on one side of the bottom end of the limiting column.

[0008] As a preferred technical solution of the present application, the upper opening of the limiting cavity is located within the first concave arc surface. The top of the limiting magnetic block is provided with a second concave arc surface. When the electromagnetic block is in a power-off state, the second concave arc surface is docked with the first concave arc surface and is adapted to abut against the spherical surface of the hemispherical body. Among them, anti-slip lines for restricting the rotation of the hemispherical body are opened in the second concave arc surface.

[0009] As a preferred technical solution of the present application, the top end of the installation cavity has an upper limiting port for the operating rod to pass through and move in four directions. An arc-shaped turntable is fixedly sleeved on the middle part of the operating rod. The arc-shaped turntable covers the upper limiting port and its outer arc surface is slidably connected to the inner side of the upper limiting port.

[0010] As a preferred technical solution of the present application, the connecting plate located at the lower part is integrally fixed on the hemisphere, and the periphery of the connecting plate is arranged in a circular array with four sockets for clamping and fixing the inner end of the traction rope, one of the conductive blocks is installed at the upper peripheral position of the connecting plate and its bottom end is electrically connected to the connecting end of the electromagnetic block through a wire.

[0011] As a preferred technical solution of the present application, a second spring is arranged between the two connecting plates, the connecting plate located at the upper part is slidably sleeved on the operating rod and the movement is controlled by a downward pressure control component, the downward pressure control component includes a driving ring rotatably sleeved on the operating rod and a driven ring fixed on the connecting plate, the driving ring is transmission-connected to the finger pressure block through an intermittent rotation structure, and the opposite ends of the driving ring and the driven ring are both annularly and equidistantly provided with a group of arc-shaped protrusions, and the two groups of arc-shaped protrusions are relatively slidably connected, wherein the conductive block located on the connecting plate, the connecting end of the electromagnetic block and the built-in power supply of the machine body are respectively electrically connected through wires.

[0012] As a preferred technical solution of the present application, the intermittent rotation structure includes a driving sleeve integrated in the middle part of the driving ring, and the inner wall of the driving sleeve is provided with a group of linear grooves and arc-shaped oblique grooves, and the linear grooves and the arc-shaped oblique grooves are spaced in sequence and connected end to end, wherein the bottom end groove depth of the arc-shaped oblique groove is greater than the bottom end groove depth of the linear groove, and the middle part of the operating rod has an operating cavity, and a downward pressure column is arranged in the operating cavity through a third spring, and the outer end of the downward pressure column is fixed to the finger pressure block, and a slider compatible with the linear groove and the arc-shaped oblique groove is elastically arranged in the middle part of the downward pressure column, and a movable groove for the elastic slider to pass through and move is opened on the operating rod.

[0013] As a preferred technical solution of the present application, the distance between the bottom end of the pressure column and the operating cavity and the length of the pressure column extending out of the operating rod are both greater than the length of the linear groove, and a finger pressure groove is provided on the finger pressure block.

[0014] As a preferred technical solution of the present application, the bottom of the operating rod has a stepped surface, the arc-surface turntable has a turntable sleeve adapted to the operating rod, and the drive sleeve is sleeved between the turntable sleeve and the stepped surface.

[0015] Compared with the prior art, the present invention has the following beneficial effects: In the scheme of this application: The present application sets up a locking mechanism, and uses the thumb of the pushing operating lever to control the connection state of the two conductive blocks, thereby controlling the contact state between the limit magnetic block and the hemisphere, making it convenient for the operator to control the restriction of the hemisphere with one hand, that is, to control the direction of the probe part, and the operation is simple and convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1Front view of the four-way adjustable endoscope provided by this application; Figure 2 For the four-way adjustable endoscope provided by this application Figure 1 Partial side sectional view at the middle hemisphere; Figure 3 Schematic diagram of the structural separation inside the installation cavity of the four-way adjustable endoscope provided by this application; Figure 4 Schematic diagram of the structure of the locking mechanism of the four-way adjustable endoscope provided by this application; Figure 5 Schematic diagram of the structure of the hemisphere, limiting magnet block and electromagnetic block of the four-way adjustable endoscope provided by this application; Figure 6 Schematic diagram of the separated structure of the pressing column and the driving ring of the four-way adjustable endoscope provided by this application; Figure 7 For the four-way adjustable endoscope provided by this application Figure 6 Enlarged view at position A.

[0017] Labels in the figure: 100, body; 101, installation cavity; 102, probe head; 103, support disc; 104, connection hole; 105, upper limit port; 200, hemisphere; 201, traction rope; 202, operating rod; 203, arc-shaped turntable; 204, card seat; 205, operating cavity; 206, third spring; 207, pressing column; 208, slider; 209, movable notch; 210, turntable sleeve; 300, limit post; 301, limiting magnet block; 302, electromagnetic block; 303, first concave arc surface; 304, limiting cavity; 305, first spring; 306, wire groove; 307, second concave arc surface; 400, connecting plate; 401, conductive block; 402, wire; 403, second spring; 500, finger pressing block; 501, driving ring; 502, driven ring; 503, arc-shaped convex block; 504, driving sleeve; 505, linear groove; 506, arc-shaped inclined groove. Detailed implementation manners

[0018] In order to enable those skilled in the art to better understand the solution of the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0019] The present invention will be further described below in conjunction with embodiments.

[0020] Embodiment: Refer to Figures 1 to 2 , a four-way adjustable endoscope, including a body 100, the body 100 is a conventional endoscope structure in the prior art, with an installation cavity 101 in the middle, a tube part at the bottom of the middle part, and a probe head 102 at the bottom of the tube part. It also includes an adjustment mechanism for controlling the direction of the probe head 102, including a hemispherical body 200 limitedly arranged at the lower part of the installation cavity 101. The outer end of the hemispherical body 200 is connected and driven to the probe head 102 through a set of traction ropes 201. An operating rod 202 extending outside the body 100 is integrally formed in the middle of the hemispherical body 200. The above-provided endoscope structure and the adjustment of the corresponding turning of the probe head 102 through the rotation of the hemispherical body 200 and the traction of the traction rope 201 are all mature technical means in the existing industrial endoscopes and will not be elaborated here; In order to solve the problem that when the existing working endoscope maintains the direction of the probe head 102, the operator's hand still needs to maintain a hand posture of pushing the operating rod 202. The operator's hand is prone to fatigue and inconvenient for continuous detection. At the same time, it is easy for the operating rod 202 to loosen due to the tremor of the operator's hand, resulting in a deviation in the probe direction and affecting the observation efficiency. A locking mechanism is provided in this application; Specifically, refer to Figures 2 to 7 , the locking mechanism is used to limit the state of the hemispherical body 200, and it includes a limiting column 300 arranged at the lower part of the installation cavity 101. The hemispherical body 200 is limited to rotate on the top of the limiting column 300. A limiting magnet 301 opposite to the hemispherical body 200 is slidably arranged on the limiting column 300. An electromagnetic block 302 for controlling the linear movement of the limiting magnet 301 is arranged at the bottom of the limiting column 300. A pair of parallel connecting plates 400 are slidably arranged on the operating rod 202. Opposite conductive blocks 401 are respectively arranged on the two connecting plates 400. A closed circuit is electrically connected between the two conductive blocks 401, the electromagnetic block 302, and the built-in power supply module of the body 100 through a wire 402. When the two conductive blocks 401 are connected, the electromagnetic block 302 generates a magnetic force to adsorb the limiting magnet 301 to move downward to release the restriction on the hemispherical body 200. A downward pressure control component for controlling the relative movement of the two connecting plates 400 is arranged on the operating rod 202. The downward pressure control component includes a finger pressure block 500 elastically arranged at the top of the operating rod 202; By utilizing the contact state between the electromagnetic block 302 and the control limit magnetic block 301 and the hemispherical body 200, when the limit magnetic block 301 abuts against the hemispherical body 200, it plays a role in fixing and limiting the hemispherical body 200. Specifically, when the electromagnetic block 302 is energized, it generates a magnetic force on the limit magnetic block 301, causing the limit magnetic block 301 to separate from the hemispherical body 200. Furthermore, the operating rod 202 can be flexibly controlled to control the self-rotation of the hemispherical body 200, achieving the purpose of adjusting the direction of the probe head 102. Among them, two conductive blocks 401 are respectively arranged on two connecting plates 400 and move synchronously with the operating rod 202, and whether they are connected is controlled by a finger pressure block 500 arranged on the operating rod 202, enabling the operator to quickly control the limiting state of the hemispherical body 200 during operation, making it more convenient to use.

[0021] Specifically, a support disk 103 is detachably installed at the lower part of the installation cavity 101. There is a space for the traction rope 201 to pass through and move between the support disk 103 and the bottom of the installation cavity 101. A set of connection holes 104 for the traction rope 201 to pass through are opened on the support disk 103. The limit post 300 is detachably installed in the middle of the support disk 103, and the support disk 103 provides a supporting and fixing function for the limit post 300 to facilitate the self-rotation of the hemispherical body 200.

[0022] Specifically, the top end of the limit post 300 has a first concave arc surface 303 adapted to the hemispherical body 200, providing support and four-way self-rotation limiting for the self-rotation of the hemispherical body 200. The middle part of the limit post 300 has a through limit cavity 304. The limit magnetic block 301 is inserted and slidably arranged at the top of the limit cavity 304, and a first spring 305 is installed between its bottom end and the inner wall of the limit cavity 304, enabling the limit magnetic block 301 to be opposite to the middle part of the hemispherical body 200, making the self-rotation range of the hemispherical body 200 wider. The electromagnetic block 302 is installed at the bottom of the limit cavity 304 and directly below the limit magnetic block 301. A wire groove 306 for the wire 402 to pass through is opened on one side of the bottom end of the limit post 300.

[0023] Specifically, the upper opening of the limit cavity 304 is located within the first concave arc surface 303. The top of the limit magnetic block 301 is provided with a second concave arc surface 307, increasing the contact area between the limit magnetic block 301 and the hemispherical body 200, making the limiting and fixing effect on the hemispherical body 200 better. When the electromagnetic block 302 is in the power-off state, the second concave arc surface 307 is butted against the first concave arc surface 303 under the action of the first spring 305 and is adapted to abut against the spherical surface of the hemispherical body 200. Among them, anti-slip lines for restricting the rotation of the hemispherical body 200 are opened in the second concave arc surface 307, increasing the friction between the limit magnetic block 301 and the hemispherical body 200, further enhancing the limiting and fixing effect on the hemispherical body 200 and improving the fixing effect on the direction of the probe head 102.

[0024] Specifically, the top end of the installation cavity 101 has an upper limit port 105 through which the operating rod 202 passes and can move in four directions. A curved surface turntable 203 is fixedly sleeved in the middle of the operating rod 202. The curved surface turntable 203 covers the upper limit port 105 and its outer curved surface is slidably connected to the inner side of the upper limit port 105. Through the setting of the curved surface turntable 203, during assembly, the hemispherical body 200 is located in the first concave arc surface 303 at the top end of the limit post 300, and the curved surface turntable 203 is slidably connected to the inner side of the upper limit port 105, enabling the hemispherical body 200 to rotate stably within the first concave arc surface 303. Preferably, the curved surface turntable 203 and the operating rod 202 can be fixed by means of thread fitting, facilitating the disassembly, assembly, and combination of the overall structure.

[0025] Specifically, the lower connecting plate 400 is integrally fixed to the hemispherical body 200. Four card seats 204 for clamping and fixing the inner ends of the traction ropes 201 are arranged in a circular array around the periphery of the connecting plate 400. One of the conductive blocks 401 is installed at the outer peripheral position on the upper side of the connecting plate 400, and its bottom end is electrically connected to the connecting end of the electromagnetic block 302 through a wire 402. The conductive block 401 also has a raised enclosure. The bottom end of the other conductive block 401 is located within the enclosure, which plays a role in dust prevention for the connection of the two conductive blocks 401. Correspondingly, through the setting of the wire 402, when the conductive block 401 moves in any direction along with the hemispherical body 200 and the connecting plate 400, it can maintain the connection state with the electromagnetic block 302.

[0026] Specifically, a second spring 403 is provided between the two connecting plates 400. The connecting plate 400 located at the upper part is sleeved and slidably mounted on the operating rod 202 and its movement is controlled by a downward pressure control assembly. The downward pressure control assembly includes a driving ring 501 rotatably sleeved on the operating rod 202 and a driven ring 502 fixed on the connecting plate 400. The driving ring 501 is transmission-connected to the finger-pressing block 500 through an intermittent rotation structure. The opposite ends of the driving ring 501 and the driven ring 502 are both annularly and equidistantly provided with a group of arc-shaped protrusions 503. The two groups of arc-shaped protrusions 503 are relatively slidably connected. The conductive block 401 located on the connecting plate 400 and the connecting end of the electromagnetic block 302 are electrically connected to the built-in power supply of the body 100 through the wire 402 respectively. By setting a driving ring 501 and a driven ring 502, when the driving ring 501 rotates, the arc-shaped protrusion 503 on the driving ring 501 squeezes the arc-shaped protrusion 503 on the driven ring 502, causing it to move downward, thereby connecting the conductive blocks 401 on the two connecting plates 400, thereby making the electromagnetic block 302 in an energized state and generating a magnetic force on the limiting magnetic block 301, thereby releasing the restriction on the hemispherical body 200. Correspondingly, when the two arc-shaped protrusions 503 are misaligned, under the action of the second spring 403, the two conductive blocks 401 are separated, the magnetic force of the electromagnetic block 302 on the limiting magnetic block 301 disappears, and the limiting magnetic block 301 is reset under the action of the first spring 305, thereby restoring the limiting effect on the hemispherical body 200.

[0027] Specifically, the intermittent rotation structure includes a driving sleeve 504 integrated in the middle of the driving ring 501, and the inner wall of the driving sleeve 504 is provided with a group of linear grooves 505 and arc-shaped oblique grooves 506, the linear grooves 505 and the arc-shaped oblique grooves 506 are sequentially spaced and connected end to end, wherein the bottom end groove depth of the arc-shaped oblique groove 506 is greater than the bottom groove depth of the linear groove 505, and the middle part of the operating rod 202 is provided with an operating cavity 205, and a downward pressure is arranged in the operating cavity 205 through the third spring 206. Column 207, the outer end of the lower pressure column 207 is fixed to the finger pressure block 500, and a slider 208 adapted to the linear groove 505 and the arc-shaped inclined groove 506 is elastically provided in the middle of the lower pressure column 207. The slider 208 here is plugged into the lower pressure column 207 and the inner end is fixed by a spring (not shown in the figure). The operating rod 202 is provided with a movable notch 209 for the elastic slider 208 to pass through and move. In the initial state, the slider 208 is located in the top of the linear groove 505; In specific use, the operator presses the thumb on the finger pressure block 500, first presses the finger pressure block 500 downward. The finger pressure block 500 drives the downward pressure rod and the slider 208 to move downward synchronously. When the slider 208 is at the bottom end of the linear groove 505 (that is, when the finger pressure block 500 cannot be pressed any further), release the finger pressure block 500 to make it reset. In this state, the slider 208 enters the arc-shaped inclined groove 506 and starts to squeeze the arc-shaped inclined groove 506, causing the driving ring 501 to start rotating. The arc-shaped convex block 503 on the driving ring 501 squeezes the arc-shaped convex block 503 on the driven ring 502 in this state, making the two conductive blocks 401 electrically connected. Correspondingly, by repeating the above operations of pressing and releasing the finger pressure block 500, the driving ring 501 can rotate another unit, and then the two arc-shaped convex blocks 503 are misaligned, causing the two conductive blocks 401 to be powered off. With the cooperation of the above structure, by using the thumb that pushes the operating lever 202 to control the connection state of the two conductive blocks 401, it is convenient for the operator to control the restriction of the hemispherical body 200 with one hand, that is, to control the direction of the probe head 102. At the same time, by using the setting of the linear groove 505, when the operator's thumb is placed on the finger pressure block 500 and the operating lever 202 rotates with the hemispherical body 200, as long as the finger pressure block 500 is not pressed to the bottom and released, the rotation of the driven ring 502 will not be driven, maintaining the practicality of controlling the operating lever 202.

[0028] Specifically, the distance between the bottom end of the downward pressure column 207 and the operating cavity 205 and the length of the downward pressure column 207 extending out of the operating lever 202 are both greater than the groove length of the linear groove 505, leaving space for the movement of the slider 208 on the downward pressure column 207. The finger pressure block 500 is provided with a finger pressure groove, which is convenient for the finger pressure block 500 to drive the operating lever 202 and the hemispherical body 200 to rotate under force.

[0029] Specifically, the bottom of the operating lever 202 has a stepped surface. The arc-shaped turntable 203 has a turntable sleeve 210 adapted to the operating lever 202. The driving sleeve 504 is sleeved between the turntable sleeve 210 and the stepped surface. By using the limitation of the stepped surface and the turntable sleeve 210, space for the rotation of the driving ring 501 is provided, facilitating the installation of the driving ring 501.

[0030] In the present invention, unless otherwise clearly specified and limited, terms such as "installation", "connection", "connection", "fixation" and other terms should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection, an electrical connection or communication with each other; it can be directly connected, or indirectly connected through an intermediate medium, and can be the internal communication of two components or the interaction relationship between two components, unless otherwise clearly limited. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0031] Obviously, the embodiments described above are only a part of the embodiments of the present invention, rather than all of them. The preferred embodiments of the present invention are shown in the drawings, but they do not limit the patent scope of the present invention. The present invention can be implemented in many different forms. On the contrary, the purpose of providing these embodiments is to make the understanding of the disclosed content of the present invention more thorough and comprehensive. Although the present invention has been described in detail with reference to the foregoing embodiments, for those skilled in the art, they can still modify the technical solutions recorded in the foregoing specific embodiments, or perform equivalent replacements on some of the technical features. Any equivalent structure that makes use of the content of the specification and drawings of the present invention, directly or indirectly applied in other related technical fields, is equally within the scope of the patent protection of the present invention.

Claims

1. A four-way adjustable endoscope, comprising a body (100), wherein the middle portion of the body (100) has a mounting cavity (101), and a probe portion (102) at the bottom end of the middle portion of the body (100), characterized in that: include: An adjustment mechanism, used for controlling the direction of the probe portion (102), comprising a hemispherical body (200) limitedly arranged at the lower part of the installation cavity (101), the outer end of the hemispherical body (200) being connected to the probe portion (102) for transmission via a set of traction ropes (201), and the middle part of the hemispherical body (200) being integrally provided with an operating rod (202) extending to the outside of the body (100); The locking mechanism is used to limit the state of the hemispherical body (200), comprising a limiting column (300) arranged at the lower part of the installation cavity (101), the hemispherical body (200) is limited to rotate at the top of the limiting column (300), a limiting magnetic block (301) opposite to the hemispherical body (200) is slidably arranged on the limiting column (300), an electromagnetic block (302) for controlling the linear movement of the limiting magnetic block (301) is arranged at the bottom of the limiting column (300), a pair of parallel connecting plates (400) are slidably arranged on the operating rod (202), and the two connecting plates (400) are respectively provided with There are conductive blocks (401) facing each other. The two conductive blocks (401), the electromagnetic block (302) and the built-in power module of the machine body (100) are electrically connected via a wire (402) to form a closed loop. When the two conductive blocks (401) are connected, the electromagnetic block (302) generates magnetic force to attract the limit magnetic block (301) to move downward to release the restriction on the hemispherical body (200). The operating rod (202) is provided with a downward pressure control component for controlling the relative movement of the two connecting plates (400). The downward pressure control component includes a finger pressure block (500) elastically arranged on the top of the operating rod (202).

2. The four-way adjustable endoscope according to claim 1, characterized in that: A support plate (103) is detachably mounted at the bottom of the installation cavity (101); a space for a traction rope (201) to pass through is reserved between the support plate (103) and the bottom of the installation cavity (101); a group of connection holes (104) for the traction rope (201) to pass through are provided on the support plate (103); and the limiting column (300) is detachably mounted at the middle of the support plate (103).

3. The four-way adjustable endoscope according to claim 2, characterized in that: The top of the limiting column (300) has a first concave arc surface (303) adapted to the hemisphere (200), the middle of the limiting column (300) has a penetrating limiting cavity (304), the limiting magnetic block (301) is inserted and slidably arranged at the top of the limiting cavity (304), and a first spring (305) is installed between its bottom end and the inner wall of the limiting cavity (304), the electromagnetic block (302) is installed at the bottom of the limiting cavity (304) and is located directly below the limiting magnetic block (301), and a wire groove (306) for the wire (402) to pass through is opened on one side of the bottom end of the limiting column (300).

4. The four-way adjustable endoscope according to claim 3, characterized in that: The upper opening of the limiting cavity (304) is located in the first concave arc surface (303), and a second concave arc surface (307) is provided on the top of the limiting magnetic block (301). When the electromagnetic block (302) is powered off, the second concave arc surface (307) is butted against the first concave arc surface (303) and is adapted to abut against the spherical surface of the hemisphere (200), wherein the second concave arc surface (307) is provided with an anti-slip pattern for limiting the rotation of the hemisphere (200).

5. The four-way adjustable endoscope according to claim 4, characterized in that: The top end of the installation cavity (101) has an upper limit opening (105) for the operating rod (202) to pass through and is movable in four directions. The middle fixed sleeve of the operating rod (202) is provided with an arc-surface rotating disk (203). The arc-surface rotating disk (203) covers the upper limit opening and its outer arc surface is slidably connected to the inner side of the upper limit opening (105).

6. The four-way adjustable endoscope according to claim 5, characterized in that: The connecting plate (400) located at the bottom is integrally fixed on the hemispherical body (200), and four clamping seats (204) for clamping and fixing the inner end of the traction rope (201) are arranged in a circular array on the periphery of the connecting plate (400), wherein one of the conductive blocks (401) is installed at the upper peripheral position of the connecting plate (400) and its bottom end is electrically connected to the connection end of the electromagnetic block (302) through a wire (402).

7. The four-way adjustable endoscope according to claim 6, characterized in that: A second spring (403) is arranged between the two connecting plates (400); the connecting plate (400) located at the upper part is sleeved and slidably mounted on the operating rod (202) and is controlled to move by a downward pressure control assembly; the downward pressure control assembly comprises a driving ring (501) rotatably sleeved on the operating rod (202) and a driven ring (502) fixed on the connecting plate (400); the driving ring (501) is transmission-connected to the finger-pressing block (500) through an intermittent rotation structure; opposite ends of the driving ring (501) and the driven ring (502) are both provided with a group of arc-shaped protrusions (503) at equal intervals in an annular shape; the two groups of arc-shaped protrusions (503) are relatively slidably connected; wherein the connecting ends of the conductive block (401) and the electromagnetic block (302) located on the connecting plate (400) and a power source built into the machine body (100) are electrically connected respectively through wires (402).

8. The four-way adjustable endoscope according to claim 7, characterized in that: The intermittent rotation structure comprises a driving sleeve (504) integrally formed in the middle of the driving ring (501), the inner wall of the driving sleeve (504) is provided with a group of linear grooves (505) and arc-shaped oblique grooves (506), the linear grooves (505) and the arc-shaped oblique grooves (506) are spaced in sequence and connected end to end, wherein the bottom end groove depth of the arc-shaped oblique groove (506) is greater than the bottom end groove depth of the linear groove (505), and the middle part of the operating rod (202) has an operating The operating cavity (205) is provided with a pressing column (207) via a third spring (206), the outer end of the pressing column (207) is fixed to the finger pressure block (500), the middle part of the pressing column (207) is elastically provided with a slider (208) adapted to the linear groove (505) and the arc-shaped inclined groove (506), and the operating rod (202) is provided with a movable notch (209) for the elastic slider (208) to pass through and move.

9. The four-way adjustable endoscope according to claim 8, characterized in that: The distance between the bottom end of the pressing column (207) and the operating chamber (205) and the length of the pressing column (207) extending out of the operating rod (202) are both greater than the length of the linear groove (505), and a finger pressing groove is provided on the finger pressing block (500).

10. The four-way adjustable endoscope according to claim 9, characterized in that: The bottom of the operating rod (202) has a stepped surface, the arc-surface turntable (203) has a turntable sleeve (210) adapted to the operating rod (202), and the drive sleeve (504) is sleeved between the turntable sleeve (210) and the stepped surface.

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