A connection structure between an endoscope light guide part and a cold light source host and an endoscope

Abstract

The invention discloses a connection structure between an endoscope light guide part and a cold light source host and an endoscope, belonging to the technical field of endoscopes. The connection structure comprises a cold light source host and a light guide part, a plug hole is provided on the host body, and also comprises a locking assembly, the locking assembly comprises a transmission case body, the transmission case body is provided with a channel, and a ball plunger is provided on the hole wall of the channel; it also comprises a worm gear installed on the transmission case body, and a second guide boss is fixed on the worm gear; it also comprises a driving assembly for driving the worm gear to rotate; a groove is provided on the outer wall of the light guide part, and a first guide boss is also provided on the outer wall of the light guide part; it also comprises a baffle plate through a compression spring, and the baffle plate is located in the channel. The endoscope comprises the connection structure, and this scheme can effectively solve the problem of unplanned detachment of the cold light source host and the light guide part during the use of the endoscope, and at the same time has the characteristic of easy use.

Description

Technical Field

[0001] The present invention relates to the technical field of endoscopes, and in particular to a connection structure between an endoscope light guide part and a cold light source host, and an endoscope. Background Art

[0002] An endoscope usually includes a host device and a mirror body connected to the host device. The specific application is that the mirror body enters the body through a natural channel or an incision channel to observe the internal features of the human body. The endoscope is an important medical device. The endoscope cold light source system is an important component of the endoscope. Its main function is to provide a high-brightness, stable light source to ensure that the doctor can clearly observe the details of the patient's body, while reducing the discomfort caused to the patient and avoiding the risk of tissue damage.

[0003] In existing applications, the cold light source system includes a cold light source host and a light guide tube. The light guide tube is connected to the cold light source host through the light guide part at its connection end. The common connection method is plug-in connection, and the connection state of the light guide part on the cold light source host is constrained by an elastic member. During the use of the endoscope, there is a risk of excessive pulling on the endoscope hose (light guide tube) when the operator turns around or makes large movements. Possible problems include causing the endoscope light guide part to fall off from the cold light source host, causing the endoscope to lose image signals and lighting environment during the operation, posing a safety hazard to the safety of the operation. At the same time, as the endoscope serves a longer service life, when the elastic member ages, the connection reliability between the light guide part and the cold light source host will be greatly reduced.

[0004] Based on the connection reliability problem between the light guide part and the cold light source host, the prior art involves patent documents with publication (announcement) numbers CN110403563B, CN109950723B, CN213429973U, and CN113520277A. Among these technical solutions, a technical solution using a magnetic adsorption method to improve the connection reliability between the light guide part and the cold light source host is provided, and a technical solution based on a spring steel ball clip to achieve corresponding connection is provided (CN109950723B).

[0005] Endoscopes are medical instruments widely used in the medical field. Further optimization of endoscopes will undoubtedly promote the development of the medical industry. Summary of the invention

[0006] In order to further optimize the endoscope, the present invention provides a connection structure between the light guide of an endoscope and a cold light source host and an endoscope. This solution can effectively solve the problem of unplanned detachment of the cold light source host and the light guide during the use of the endoscope, and is easy to use.

[0007] In view of the above problems, the present invention provides a connection structure between an endoscope light guide part and a cold light source host and an endoscope to solve the problems through the following technical points: an endoscope light guide part and a cold light source host connection structure, comprising a cold light source host and a light guide part, a host body of the cold light source host is provided with a plug hole for plugging the light guide part, and also includes a locking assembly for locking the light guide part on the cold light source host, the locking assembly includes a transmission box fixed to the host body housing, the transmission box is provided with a channel coaxial with the plug hole, a ball head plunger is provided on the hole wall of the channel, one end of the ball head plunger facing the axis of the channel is a ball head end, and the other end of the ball head plunger is elastically supported on the transmission box;

[0008] It also includes a worm wheel installed on the transmission housing and coaxial with the hole, and a second guide boss protruding to the inner side of the worm wheel is fixed on the worm wheel;

[0009] Also included is a driving assembly mounted on the transmission housing and used to drive the worm gear to rotate around the worm gear axis;

[0010] The outer wall of the light guide portion is provided with a groove for embedding the ball head end, and the outer wall of the light guide portion is also provided with a first guide boss;

[0011] When the light guide is inserted into the hole until the ball end is embedded in the groove, the second guide boss and the first guide boss are located at the same axial position of the hole;

[0012] After the second guide boss rotates with the worm wheel until it is pressed against the first guide boss, the second guide boss pushes the first guide boss through the guide surface thereon, and the light guide portion further penetrates into the hole along with the first guide boss;

[0013] It also includes a baffle supported on the main body or the box cover by a compression spring, and the baffle is located in the channel. When the light guide part further penetrates into the channel, the head end of the light guide part is supported on the baffle, and the baffle forces the compression spring to produce compression deformation under the push of the head end.

[0014] When the present solution is specifically applied to an endoscope, the light guide portion serves as the head end of the light guide tube, that is, the light guide portion is used to realize the connection between the light guide tube and the cold light source host, the plug hole serves as the connection hole for connecting the light guide portion to the host body, specifically, the plug hole is used to accommodate the optical fiber tube extending from the head end of the light guide portion, the channel is used to accommodate the head end of the light guide portion, and the locking assembly serves as a component on the host body for realizing the locking of the light guide portion. In use, taking the plug hole being set at the front end of the host body as an example, the plugging process of the light guide portion and the process of locking the light guide portion by the locking assembly are as follows: at the light guide portion Before the front end of the host body is inserted into the plug-in hole, the ball plunger is supported so that the ball end is located on the insertion path of the light guide. When the light guide is inserted into the hole until the side of the light guide squeezes the ball end, the force of the outer side of the light guide on the ball end forces the ball plunger to retreat relative to the axis of the hole. When the light guide is further inserted until the groove on it faces the ball end, the ball end rebounds to fit into the groove, thereby achieving the initial fixation of the light guide on the locking assembly. At this time, in the circumferential direction of the hole, the second guide boss and the first guide boss remain staggered with each other. Then, the drive assembly works and drives The movable worm wheel rotates, and when the second guide boss rotates with the worm wheel until it is squeezed with the first guide boss, the second guide boss pushes the first guide boss through the guide surface thereon, so that the light guide part goes further into the channel along with the first guide boss, so that the second guide boss pushes the first guide boss to further embed the light guide part into the channel and the plug-in hole. When the depth of the light guide part inserted into the host body reaches the set position, the driving component stops working. At this time, the front end of the light guide part is supported by the second guide boss, and the rear end is supported by the baffle, so that the locking component locks the light guide part. When it is necessary to pull out When the light guide part comes out, the worm gear rotates relative to the light guide part under the action of the driving assembly. When the second guide boss and the first guide boss return to a mutually staggered state, the baffle applies a thrust toward the front end of the main body to the head end of the light guide part under the action of the compression spring, so that the light guide part moves forward relative to the main body. According to the elastic restoring force of the compression spring, the light guide part can be moved forward to the point where the ball head plunger is located in front of the groove, behind the groove or embedded in the groove. At this time, the light guide part can be pulled out by manually providing a pulling force along the axis of the light guide part, or the light guide part can be directly removed from the channel under the elastic restoring force.

[0015] In summary, the above ball head plunger and groove provide a structural basis for the initial fixation of the light guide part on the locking assembly. The worm gear with a first guide boss and the light guide part with a second guide boss provide a structural basis for the light guide part to be further pushed into the plug hole and the channel. The baffle provides clamping force for the guide part after the final pulling is completed, and the driving assembly serves as the power element of the locking assembly.

[0016] Compared with the prior art: This solution provides a structural basis for the process of inserting the light guide part into the host body, including preliminary fixation, further pushing, and final locking, which conforms to the general habit of users inserting the light guide tube on the cold light source host. At the same time, after the preliminary fixation, the light guide part can be further pushed to ensure the quality of the connection between the light guide part and the host body. After the worm gear stops rotating, the elastic support provided by the baffle to the head end of the light guide part can effectively maintain the stability of the worm gear and avoid the misalignment of the second guide boss relative to the first guide boss. When the light guide part is subjected to external traction such as from the light guide tube, the rigid constraint provided by the locking assembly to the light guide part can achieve reliable locking of the light guide part and avoid the unplanned detachment of the light guide tube from the cold light source host.

[0017] As described above, this solution conforms to the habit of general users to plug the light guide tube into the cold light source host. Under the action of the driving component, the plugging quality of the light guide tube can be controlled, which is conducive to ensuring the plugging quality of the light guide tube and the cold light source host. At the same time, this solution has a simple structure and is easy to use.

[0018] At the same time, in the process of the second guide boss pushing the first guide boss, the compression spring is further compressed, but the support provided by the baffle for the head end of the light guide part in this process is elastic support. Therefore, this solution can effectively avoid the damage to the drive assembly, including the second guide boss and the transmission assembly of the first guide boss, the main body itself, etc. caused by the head end being directly squeezed on the main body case; after the light guide part reaches the set position, the elastic restoring force of the compression spring can effectively maintain the relative position of the first guide boss and the second guide boss, avoiding the configuration of other locking mechanisms for the worm gear and the drive assembly, which is beneficial to simplifying the overall design of the connection structure.

[0019] In specific applications, in order to ensure the movement accuracy of the worm wheel, it is preferred to use a first bearing to rotatably mount the worm wheel on the transmission box; in order to facilitate improvements on the existing cold light source host to obtain this solution, it is preferably configured that the transmission box has a box cover at one end connected to the host body box, and a first spring pillar is provided on the back side of the box cover for contacting with the host body, the rear end of the compression spring is supported on the first spring pillar, and the baffle is supported on the front end of the compression spring. In order to facilitate adjustment of the elastic supporting force of the baffle on the head end of the light guide part, in the axial direction of the plug-in hole / channel, it is configured that the supporting position of the first spring pillar on the compression spring is adjustable, and the light source signal receiving board of the host body is arranged in the center of the box cover.

[0020] In specific applications, as a technician in this field, since the light guide part generally has an anti-rotation constraint such as a guide column, a guide hole adapted to the guide column is configured on the main body to match it (it can also be designed as an anti-rotation constraint including a guide groove and a guide edge). Under the constraint of the anti-rotation constraint, the second guide boss can only push the first guide boss for linear motion through the corresponding mating surface. Regarding the specific form of the mating surface, the second guide boss and the first guide boss change from mutual misalignment to mutual extrusion, and from mutual extrusion to mutual misalignment. These two processes can be realized in the same rotation direction of the worm wheel, or in different rotation directions of the worm wheel. When there is a capstan constrained on the worm by a one-way bearing as shown below, and the capstan replaces the function of the driving component by a pull rope wound thereon, in order to avoid the rotation of the capstan interfering with surrounding personnel, endoscope pipelines or other environmental items, the one-way bearing is used to prevent the capstan from rotating during normal use of the connection structure. In this application, it is advisable to adopt a solution in which the above two processes are realized in the same rotation direction of the worm wheel. When the capstan is operated by a pull rope, the capstan drives the worm wheel to rotate in the opposite direction relative to the rotation direction.

[0021] On the other hand, the Pin needle is the interface for signal transmission between the cold light source host and the light guide part. In this solution, the Pin needle is set as a compression spring structure, that is, the Pin needle is a spring needle. There are dozens of Pin needles in this solution, and they also provide a function similar to that of a baffle. Specifically, in the process of inserting the light guide part, the Pin needle will be compressed while squeezing the baffle. Since the Pin needle is elastic, it can be well ensured that the Pin needle always presses the corresponding signal connector on the light guide part to ensure stable signal transmission. As a further technical solution for the connection structure between the endoscope light guide part and the cold light source host:

[0022] As a specific installation method of the ball plunger, it also includes a bushing fixed on the transmission housing, the bushing is an annular structure and is coaxial with the hole;

[0023] The bushing is provided with a plurality of plunger holes, which are arranged at intervals in the circumferential direction of the bushing, and each plunger hole is provided with a ball plunger which can slide along the axis direction of the plunger hole, and one end of each plunger hole close to the axis of the channel is a reduced diameter hole, and the reduced diameter hole is used to constrain the ball plunger in the plunger hole, and the ball end can extend from the reduced diameter hole into the channel, and retract from the reduced diameter hole into the plunger hole, and each plunger hole is provided with a return spring which provides elastic support for the ball plunger;

[0024] Before the side wall of the light guide portion squeezes the ball end, the return spring supports the ball plunger so that the ball end extends into the hole;

[0025] The ball plunger is located at the same axial position of the channel, and the groove is an annular groove located on the side of the light guide portion and coaxial with the light guide portion.

[0026] In this solution, the transmission housing can be provided with a circular ring structure and a cavity structure, the cavity structure is used to install the drive assembly, and the space enclosed by the circular ring structure serves as the installation space for the worm gear, the first bearing and the bushing, that is, the worm gear, the first bearing and the bushing serve as the inner structure of the circular ring structure, and the space inside the inner structure forms the channel. In this solution, the bushing serves as the installation base for the ball plunger and the return spring, that is, the return spring is used to provide the ball plunger with a force toward the axis of the channel, such as one end of the return spring is supported on the inner wall of the circular ring structure, and the other end of the return spring is supported on the ball plunger, and the reduced diameter opening is the end at which the plunger hole is reduced in diameter to prevent the ball plunger from falling out of the inner opening of the plunger hole. When the inner side of the ball plunger is not squeezed, the return spring squeezes the ball plunger to be against the reduced diameter opening. At this time The ball head end extends from the reduced diameter hole into the channel. When the light guide part enters the channel, the ball head end is pushed by the side of the light guide part, and the ball head plunger is squeezed into the plunger hole under the normal force applied to the ball head end. When the light guide part continues to move forward until the groove is directly opposite to the ball head plunger, the return spring pushes the ball head plunger, so that the ball head end is embedded in the groove. At this time, the vibration and sound caused by the ball head end hitting the light guide part, or the resistance of the light guide part to further move forward, can be judged as the light guide part is inserted into a preliminary fixed state.

[0027] The arrangement is such that, through a plurality of plunger holes, a plurality of ball head plungers located at the same axial position of the channel are arranged at different positions in the circumferential direction of the channel, and the groove is an annular groove on the side of the light guide part that is coaxial with the light guide part. In this way, during the process of the light guide part completing the initial fixation, when there are ball head plungers on each side of a pair of opposite sides of the channel, the coaxiality of the light guide column and the channel can be adjusted by supporting the light guide column with ball head plungers in different orientations. At the same time, each ball head plunger can be synchronously embedded in the annular groove, and the locking assembly utilizes the multi-point support provided for the light guide part to maintain the coaxiality of the light guide part under initial fixation, as well as the relative position of the first guide boss and the second guide boss in the axial direction of the channel, which is beneficial to the reliability of the subsequent locking assembly locking the light guide part and ensuring the connection quality of the light guide part on the cold light source host. The groove is realized in the annular groove so that a single annular groove can fit all ball head plungers. Therefore, the present scheme also has the characteristics of convenient processing and preparation.

[0028] In the above scheme, the ball plunger and the return spring are first and then inserted into the plunger hole from the outer opening of the plunger hole, and then the formed assembly is assembled to the inner side of the annular structure to complete the installation of the ball plunger on the transmission housing, so the above structural form is easy to assemble. The reduced diameter opening is located at one end of the plunger hole close to the axis of the channel, which is a preferred scheme for the position adaptation of the reduced diameter opening, and is intended to reduce the shaking of the ball end during use by constraining the side wall of the reduced diameter opening on the side wall of the ball end. When the technicians in this field set the reduced diameter hole on the plunger hole to constrain the ball plunger at other positions of the plunger hole, it should also be considered that the concept is essentially the same as that of this scheme.

[0029] As a specific implementation of the drive assembly, the drive assembly includes a worm installed in the transmission housing and meshing with the worm wheel, and also includes a drive motor for driving the worm to rotate;

[0030] A winch is coaxially mounted on the worm through a one-way bearing, and a pull rope is wound on the winch. When the pull rope is pulled out from the winch, the winch transmits torque to the worm through the one-way bearing.

[0031] In this solution, the worm drives the worm wheel to rotate under the action of the driving motor. According to the misalignment angle of the first guide cam and the second guide cam when the light guide part is inserted, when the second guide cam rotates the first angle, the second guide cam pushes the first guide cam and causes the light guide part to move to the set position. When the second angle is continued to be rotated in the same direction, the second guide cam and the first guide cam are misaligned so that the light guide part can be pulled out. The one-way bearing does not transmit torque to the capstan during the above process to avoid instability caused by the rotation of the capstan. When the driving motor is damaged, the worm is driven to rotate by pulling the cable. The rotation direction of the worm under the action of the capstan is opposite to the rotation direction of the worm under the action of the driving motor, that is, the function of using the pull rope and the capstan to replace the driving motor in an emergency is achieved. In order to facilitate the precise control of the rotation angle of the worm wheel, the driving motor is preferably a servo motor or a stepper motor. In order to ensure the reliability of the capstan function, the pull rope is preferably a wire rope.

[0032] In order to enable the pull rope to be automatically reeled in after the winch performs emergency driving on the worm, a coil spring is also included, one end of which acts on the winch and the other end of which acts on the transmission box.

[0033] In this solution, the coil spring stores energy when the winch rotates. When the pull rope is released, the winch reverses under the action of the coil spring to reel in the pull rope, so as to prepare the winch for the next use and to organize the on-site environment; at the same time, the constraint of the coil spring on the winch can ensure the stability of the winch when it is not in use. Preferably, in order to facilitate the pull rope pulling control and stabilize the state of the winch when reeling in the pull rope, the coil spring is a constant force spring. In specific implementation, the drive motor is fixed to the outside of the transmission housing through the motor mounting plate, the coil spring acts on the transmission housing through the first spring support, and the two ends of the worm are respectively provided with a second bearing and a third bearing for supporting the worm in the transmission housing. The fixing of the one-way bearing on the axis of the worm is achieved by a shaft retaining ring installed on the worm, and the coaxiality of the worm and the winch is maintained by a wider one-way bearing, and can also be achieved by using a one-way bearing and a friction-reducing ring installed between the winch and the worm.

[0034] To prevent the light guide from being skewed relative to the channel / plug hole due to the force of the baffle on the head end of the light guide, the number of baffles is greater than 1, each baffle is equipped with a compression spring, and the baffles are symmetrical relative to the axis of the channel. Specifically, as the light guide part is further inserted into the cold light source host, in the process that the force of the baffle on the light guide part continues to increase, if the effect of the reset spring on the light guide part cannot cope with the skewness of the light guide part well, it may affect the connection quality of the light guide part. In this scheme, baffles are symmetrically arranged relative to the axis of the channel so that the skewness of the head end of each baffle can offset each other, thereby achieving the purpose of ensuring the plug-in quality of the light guide part on the cold light source host. For the scheme in which the first spring pillar can adjust the support position of the compression spring as mentioned above, when applied to this scheme, the first spring pillar can be adjusted, such as the compression spring is supported on the first spring pillar, the axis of the first spring pillar is parallel to the axis of the channel, and the first spring pillar is threadedly connected to the box cover. By rotating the first spring pillar, the support state of the compression spring on the back of each baffle is adapted to adapt the force of the baffle on the head end of the light guide part during the process of the light guide part extending into the channel.

[0035] As a technical solution in which the present invention can automatically perform further pushing action after the light guide part is initially fixed, and the locking assembly can automatically stop the action to lock the light guide part after the light guide part reaches the set position, the present invention also includes a sensor for detecting the insertion depth of the light guide part in the plug hole, and the sensor is data-connected to the control module of the driving assembly;

[0036] When the sensor identifies that the ball plunger is embedded in the groove, the driving assembly drives the worm wheel to rotate under the control of the control module. After the second guide boss rotates with the worm wheel until it is pressed against the first guide boss, the second guide boss pushes the first guide boss through the guide surface thereon, and the light guide part goes further into the hole along with the first guide boss.

[0037] When the sensor identifies that the insertion depth of the light guide portion in the plug hole reaches a set position, the driving assembly stops moving under the control of the control module.

[0038] In the above scheme, the sensor is used to detect the insertion depth of the light guide in the plug-in hole. The sensor transmits the insertion depth detection result to the control module through the data connection with the control module. After the sensor's detection result determines that the initial fixation is completed, the drive component is activated, and the worm gear is used to pull the light guide so that it is further inserted into the plug-in hole; after the sensor recognizes that the set position has been reached, the drive component stops the action, and the baffle and the first guide boss are used to maintain the locking state of the light guide. Furthermore, when the locking component performs the action of releasing the light guide, the corresponding instruction can be provided to the control module of the locking component by operating a button on the light guide, a human-computer interaction screen of the endoscope, or other input devices, and the locking component performs the action of releasing the light guide under the instruction.

[0039] As a sensor implementation method with a simple structure and reliable detection results, the sensor includes a photoelectric sensor and a photoelectric baffle, and the photoelectric sensor obtains different inspection results according to different swing angles of the photoelectric baffle;

[0040] The photoelectric baffle is arranged in the plug-in hole, and the light guide part pushes the photoelectric baffle to swing through the optical fiber tube at the front end thereof.

[0041] In the above scheme, as the insertion depth of the light guide part in the plug hole / channel increases, when the optical fiber tube at the front end of the light guide part pushes on the photoelectric baffle, the photoelectric baffle can be forced to swing a certain angle, and the swing angle increases with the increase of the insertion depth. In this way, the photoelectric baffle is used to adjust the transmission, blocking, reflection or interference of light, etc., and the insertion depth of the light guide part in the plug hole can be obtained by using the relationship between the swing angle and the insertion depth and the different detection results of the photoelectric sensor under different swing angles of the photoelectric baffle. In this scheme, the state of the photoelectric baffle is associated with the insertion depth of the optical fiber tube, which is different from using the optical fiber tube as the only influencing structure of the light field. It is determined by the structure and surface conditions of the head end of the optical fiber tube. During the further insertion of the optical fiber tube, the influence of different insertion depths on the light field may be the same. Therefore, the sensor including only the light emitting end and the receiving end may not be able to reliably measure the change of the light guide part from the initial fixed position to the set position. In this scheme, the photoelectric baffle is used as a light field interference component and is linked with the light guide part, which can effectively solve the above problems under the condition of simple structure.

[0042] In order to obtain multiple action positions on the worm gear for pushing the light guide part to be further inserted into the cold light source main unit, the number of the first guide bosses and the number of the second guide bosses are both greater than 1, and the number of the first guide bosses is equal to the number of the second guide bosses;

[0043] The first guide bosses are located at the same axial position of the light guide portion and are evenly distributed in the circumferential direction of the light guide portion, and the second guide bosses are located at the same axial position of the hole and are evenly distributed in the circumferential direction of the hole;

[0044] During the rotation of the worm gear relative to the light guide part, when the second guide boss rotates to be squeezed against the first guide boss, the first guide boss and the second guide boss cooperate one by one, and each second guide boss pushes the first guide boss that cooperates with it to move in the direction of the plug-in hole, and each first guide boss has the same movement speed.

[0045] In the above scheme, after the light guide part is inserted straight into the hole, as the worm gear drives the first guide boss to rotate, during the rotation process, each first guide boss synchronously interacts with the corresponding second guide boss to form the action position and make the action position evenly distributed in the circumferential direction of the hole, and by evenly pushing the light guide part in the circumferential direction of the hole, the light guide part is forced to further penetrate the hole in a stable posture. As a technician in this field, in order to achieve the same movement speed, the purpose can be achieved by configuring the configuration of the corresponding guide surface. For the convenience of preparation, the shapes of the first guide bosses are the same, and the shapes of the second guide bosses are the same.

[0046] In order to better stabilize the relative position of the first guide boss and the second guide boss so as to maintain the reliability of the locking assembly locking the light guide portion, one of the mating surface on the first guide boss for mating with the second guide boss and the mating surface on the second guide boss for mating with the first guide boss is a continuous curved surface with a depression thereon, and the other is a continuous curved surface with a protrusion thereon;

[0047] The first guide boss and the second guide boss can rotate relative to each other so that the protrusion is embedded in the recess.

[0048] In this solution, the groove can be configured on one of the two, and the protrusion is configured on the other of the two. In specific application, it is set as follows: when the protrusion is embedded in the recess, the light guide part is inserted into the cold light source host to reach the set position. At this time, the mutual limiting effect of the groove and the protrusion under the pushing of the baffle is utilized to increase the resistance to the rotation of the worm gear, thereby achieving the purpose of ensuring the reliability; further, the matching form of the protrusion and the recess will make the worm gear have a load inflection point when rotating, such as the load of the worm gear is reduced when the protrusion enters the groove, and the load of the worm gear is increased when the protrusion escapes from the groove. Therefore, this solution provides a structural basis for determining whether the worm gear has rotated to a suitable angle (at which the light guide part is pushed to the set position) by monitoring the power parameters of the drive motor.

[0049] As a parallel solution, the first guide boss and the second guide boss are both: the two sides are sloped surfaces, the top is a plane, and the plane and the slopes are smoothly transitioned. The relative position detection of the first guide boss and the second guide boss is realized by a Hall element. For example, a permanent magnet is fixed on the worm gear, and a Hall element for detecting the position of the permanent magnet is installed on the box cover. Based on the detection result of the Hall element, it is determined whether the worm gear rotates to the required position ( Figure 5 The Hall element is installed on the curved plate on the lower left side of the middle box cover).

[0050] As a specific application of the endoscope light guide part and cold light source host connection structure, the present solution also relates to an endoscope, which includes the endoscope light guide part and cold light source host connection structure as described in any one of the above items.

[0051] The present invention has the following beneficial effects:

[0052] This solution provides a structural basis for the process of inserting the light guide part into the host body, including preliminary fixation, further pushing, and final locking. It conforms to the general habit of users to insert the light guide tube on the cold light source host. At the same time, after the preliminary fixation, the plug-in quality of the light guide part and the host body can be guaranteed by further pushing the light guide part. After the worm gear stops rotating, the rigid constraint provided by the locking assembly to the light guide part can realize reliable locking of the light guide part, avoiding the unplanned detachment of the light guide tube from the cold light source host.

[0053] At the same time, the present solution can effectively prevent the head end from being directly squeezed onto the main body casing and causing damage to the drive assembly, including the second guide boss and the transmission assembly of the first guide boss, the main body itself, etc.; after the light guide portion reaches the set position, the elastic restoring force of the compression spring can effectively maintain the relative position of the first guide boss and the second guide boss, avoiding the configuration of other locking mechanisms for the worm gear and the drive assembly, which is beneficial to simplifying the overall design of the present connection structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0054] Figure 1 This is a structural schematic diagram reflecting the coordination relationship between the cold light source host and the light guide part in a specific embodiment of the prior art;

[0055] Figure 2 This is a structural schematic diagram reflecting the coordination relationship between the cold light source host and the light guide part in a specific embodiment of the endoscope cold light source assembly described in this solution;

[0056] Figure 3 for Figure 2 A partial enlarged view of the middle A part;

[0057] Figure 4It is a structural schematic diagram of a specific embodiment of the locking assembly described in this solution, in which the viewport is located on the front side of the locking assembly;

[0058] Figure 5 It is a structural schematic diagram of a specific embodiment of the locking assembly described in the present solution, reflecting the structural schematic diagram of the locking assembly structure, in which the viewport is located at the rear side of the locking assembly;

[0059] Figure 6 A cross-sectional view of a specific embodiment of the locking assembly described in this solution;

[0060] Figure 7 This is a structural schematic diagram of a specific embodiment of the connection structure between the light guide part of the endoscope and the cold light source host of the present solution, which is used to show the state where the light guide part is not inserted into the locking assembly;

[0061] Figure 8 This is a structural schematic diagram of a specific embodiment of the connection structure between the light guide part of the endoscope and the cold light source host of the present solution, which is used to show the state in which the light guide part has been initially fixed;

[0062] Fig. 9 This is a schematic structural diagram of a specific embodiment of the connection structure between the light guide part of the endoscope and the cold light source host of the present solution, which is used to show the state when the light guide part reaches the set position;

[0063] Fig.10 A schematic diagram showing the relative positions of the first guide boss and the second wire boss in the circumferential direction of the channel in a specific embodiment of the connection structure between the light guide part of the scope and the cold light source host of the present solution, wherein the light guide part is in a state where it is not locked by the second guide boss;

[0064] Fig.11 A schematic diagram showing the relative positions of the first guide boss and the second wire boss in the circumferential direction of the channel in a specific embodiment of the connection structure between the light guide part of the scope and the cold light source host of the present solution, wherein the light guide part is in a state of being locked by the second guide boss;

[0065] Fig.12 A schematic diagram showing the relative positions of the first guide boss and the second wire boss in the circumferential direction of the channel in a specific embodiment of the connection structure between the light guide part of the scope and the cold light source host of the present solution, wherein the light guide part is in a state of being released by the second guide boss;

[0066] Fig.13 This is a schematic diagram for showing the installation method and principle of the sensor in a specific embodiment of the connection structure between the light guide part of the endoscope and the cold light source host described in this scheme. In this schematic diagram, the optical fiber tube is not in contact with the photoelectric baffle, and at this time, the light guide part has not reached the initial fixed state;

[0067] Fig.14 This is a schematic diagram for showing the installation method and principle of the sensor in a specific embodiment of the connection structure between the light guide part of the endoscope and the cold light source host of the present solution. In the schematic diagram, the optical fiber tube is in contact with the photoelectric baffle. At this time, the light guide part reaches a state of being pushed by the second guide boss;

[0068] Fig.15 for Figure 6 A partial enlarged view of the position of the middle friction reduction ring.

[0069] The reference numerals in the figure are: 1. cold light source host, 101. host body, 10101. photoelectric sensor, 10102. photoelectric baffle, 102. locking assembly, 10201. transmission housing, 10202. housing cover, 10203. bushing, 10204. first bearing, 10205. compression spring, 10206. first spring support, 10207. baffle, 10208. ball plunger, 10209. worm gear, 10210. worm, 10211 , drive motor, 10212, motor mounting plate, 10213, second bearing, 10214, bearing support, 10215, third bearing, 10216, capstan, 10217, second spring support, 10218, anti-friction ring, 10219, one-way bearing, 10220, shaft retaining ring, 10221, coil spring, 10222, pull rope, 10223, second guide boss, 2, light guide part, 201, button, 202, head end, 203, first guide boss. DETAILED DESCRIPTION

[0070] The present invention is further described in detail below in conjunction with embodiments, but the present invention is not limited to the following embodiments:

[0071] Embodiment 1:

[0072] like Figures 1 to 15 As shown, a connection structure between an endoscope light guide and a cold light source host comprises a cold light source host 1 and a light guide 2, wherein a host body 101 of the cold light source host 1 is provided with a plug hole for plugging in the light guide 2, and further comprises a locking assembly 102 for realizing locking of the light guide 2 on the cold light source host 1, wherein the locking assembly 102 comprises a transmission housing 10201 fixed to a housing of the host body 101, wherein the transmission housing 10201 is provided with a channel coaxial with the plug hole, and a ball plunger 10208 is provided on a hole wall of the channel, wherein one end of the ball plunger 10208 facing the axis of the channel is a ball end, and the other end of the ball plunger 10208 is elastically supported on the transmission housing 10201;

[0073] It also includes a worm wheel 10209 installed on the transmission housing 10201 and coaxial with the hole, and a second guide boss 10223 protruding to the inner side of the worm wheel 10209 is fixed on the worm wheel 10209;

[0074] It also includes a driving assembly mounted on the transmission housing 10201 and used to drive the worm gear 10209 to rotate around the axis of the worm gear 10209;

[0075] The outer wall of the light guide portion 2 is provided with a groove for embedding the ball head end, and the outer wall of the light guide portion 2 is also provided with a first guide boss 203;

[0076] When the light guide 2 is inserted into the hole until the ball end is embedded in the groove, the second guide boss 10223 and the first guide boss 203 are located at the same axial position of the hole;

[0077] After the second guide boss 10223 rotates with the worm wheel 10209 until it is pressed against the first guide boss 203, the second guide boss 10223 pushes the first guide boss 203 through the guide surface thereon, and the light guide portion 2 is further inserted into the channel along with the first guide boss 203;

[0078] It also includes a baffle 10207 supported on the main body 101 or the box cover 10202 by a compression spring 10205, and the baffle 10207 is located in the channel. When the light guide part 2 further penetrates into the channel, the head end 202 of the light guide part 2 is supported on the baffle 10207, and the baffle 10207 forces the compression spring 10205 to produce compression deformation under the push of the head end 202.

[0079] When the present solution is specifically applied to an endoscope, the light guide portion 2 serves as the head end of the light guide tube, that is, the light guide portion 2 is used to connect the light guide tube to the cold light source host 1, and the plug hole serves as a connection hole for connecting the light guide portion 2 to the host body 101, specifically, the plug hole is used to accommodate the optical fiber tube extending from the head end 202 of the light guide portion 2, and the channel is used to accommodate the head end 202 of the light guide portion 2. The locking assembly 102 serves as a component on the host body 101 for locking the light guide portion 2. In use, taking the plug hole being provided at the front end of the host body 101 as an example, the plugging process of the light guide portion 2 and the process of locking the light guide portion 2 by the locking assembly 102 are as follows: when the light guide portion 2 is inserted from the front end of the host body 101, the plug hole is inserted into the light guide portion 2 and the plug hole is inserted into the light guide portion 2. Before being inserted into the socket, the ball plunger 10208 is supported so that the ball end is located on the insertion path of the light guide 2. When the light guide 2 is inserted into the hole until the side of the light guide 2 squeezes the ball end, the force exerted by the outer side of the light guide 2 on the ball end forces the ball plunger 10208 to retreat relative to the axis of the hole. When the light guide 2 is further inserted until the groove on it is opposite to the ball end, the ball end rebounds to be embedded in the groove, thereby achieving the initial fixation of the light guide 2 on the locking assembly 102. At this time, in the circumferential direction of the hole, the second guide boss 10223 and the first guide boss 203 remain staggered with each other. Then, the drive assembly works and drives the worm gear 10209 to rotate. When the second guide boss 10223 After the worm wheel 10209 rotates to squeeze the first guide boss 203, the second guide boss 10223 pushes the first guide boss 203 through the guide surface thereon, so that the light guide part 2 goes further into the channel along with the first guide boss 203, and the second guide boss 10223 pushes the first guide boss 203, so that the light guide part 2 is further embedded in the channel and the plug hole. When the depth of the light guide part 2 inserted into the host body 101 reaches the set position, the driving component stops working. At this time, the front end of the light guide part 2 is supported by the second guide boss 10223, and the rear end is supported by the baffle 10207, so that the locking component 102 completes the locking of the light guide part 2. When the light guide part 2 needs to be pulled out, The worm gear 10209 rotates relative to the light guide part 2 under the action of the driving assembly. When the second guide boss 10223 and the first guide boss 203 are restored to a mutually staggered state, the baffle 10207 applies a thrust toward the front end of the host body 101 to the head end 202 of the light guide part 2 under the action of the compression spring 10205, so that the light guide part 2 moves forward relative to the host body 101. According to the elastic restoring force of the compression spring 10205, the light guide part 2 can be moved forward to the point where the ball head plunger 10208 is located in front of the groove, behind the groove or embedded in the groove. At this time, the light guide part 2 can be pulled out by manually providing a pulling force along the axis of the light guide part 2, or the light guide part 2 can be directly removed from the channel under the elastic restoring force.

[0080] In summary, the above ball head plunger 10208 and the groove provide a structural basis for the preliminary fixation of the light guide part 2 on the locking assembly 102. The worm gear 10209 with the first guide boss 203 and the light guide part 2 with the second guide boss 10223 provide a structural basis for the light guide part 2 to be further pushed into the plug hole and the channel. The baffle 10207 provides clamping force for the guide part after the final pulling is completed, and the driving assembly serves as the power element of the locking assembly 102.

[0081] Compared with the prior art: this scheme provides a structural basis for the process of inserting the light guide part 2 into the host body 101, including preliminary fixation, further pushing, and completing final locking, which conforms to the general habit of users to insert the light guide tube on the cold light source host 1. At the same time, after the preliminary fixation, by further pushing the light guide part 2, the plug-in quality of the light guide part 2 and the host body 101 can be guaranteed. After the worm gear 10209 stops rotating, the elastic support provided by the baffle 10207 for the head end 202 of the light guide part 2 can effectively maintain the stability of the worm gear 10209, and avoid the second guide boss 10223 from being misaligned with the first guide boss 203. When the light guide part 2 is subjected to external traction such as from the light guide tube, the rigid constraint provided by the locking assembly 102 for the light guide part 2 can achieve reliable locking of the light guide part 2, and avoid the unplanned detachment of the light guide tube from the cold light source host 1.

[0082] As described above, this solution conforms to the habit of general users to plug the light guide tube into the cold light source host 1. Under the action of the driving component, the plugging quality of the light guide tube can be controlled, which is conducive to ensuring the plugging quality of the light guide tube and the cold light source host 1. At the same time, this solution has a simple structure and is easy to use.

[0083] At the same time, in the process of the second guide boss 10223 pushing the first guide boss 203, the compression spring 10205 is further compressed, but the support provided by the baffle 10207 for the head end 202 of the light guide part 2 in this process is an elastic support. Therefore, this solution can effectively avoid the head end 202 being directly squeezed on the main body 101 box and causing damage to the drive assembly, including the second guide boss 10223 and the transmission assembly of the first guide boss 203, the main body 101 itself, etc.; after the light guide part 2 reaches the set position, the elastic restoring force of the compression spring 10205 can effectively maintain the relative position of the first guide boss 203 and the second guide boss 10223, avoiding the configuration of other locking mechanisms for the worm gear 10209 and the drive assembly, which is beneficial to simplifying the overall design of the present connection structure.

[0084] In specific applications, in order to ensure the movement accuracy of the worm wheel 10209, it is preferred to use the first bearing 10204 to rotatably mount the worm wheel 10209 on the transmission box 10201; in order to facilitate improvements on the existing cold light source host 1 to obtain this solution, it is preferred to set the transmission box 10201 so that one end connected to the box of the host body 101 has a box cover 10202, and a first spring support is set on the back side of the box cover 10202 for contacting with the host body 101. 10206, the rear end of the compression spring 10205 is supported on the first spring support 10206, and the baffle 10207 is supported on the front end of the compression spring 10205. To facilitate the adjustment of the elastic supporting force of the baffle 10207 on the head end 202 of the light guide part 2, the supporting position of the first spring support 10206 on the compression spring 10205 is adjustable in the axial direction of the plug-in hole / channel, and the light source signal receiving board of the host body 101 is set in the center of the box cover 10202.

[0085] In specific applications, as a technician in this field, since the light guide part 2 generally has an anti-rotation constraint such as a guide column, the main body 101 is equipped with a guide hole adapted to the guide column (it can also be designed as an anti-rotation constraint including a guide groove and a guide edge). Under the constraint of the anti-rotation constraint, the second guide boss 10223 can only push the first guide boss 203 for linear motion through the corresponding mating surface. Regarding the specific form of the mating surface, the second guide boss 10223 and the first guide boss 203 are transformed from mutual misalignment to mutual extrusion, and from mutual extrusion to mutual misalignment. These two processes can be realized in the same rotation direction of the worm gear 10209, or in different rotation directions of the worm gear 10209. It is realized in the same rotation direction. When there is a capstan 10216 constrained on the worm 10210 by a one-way bearing 10219 as follows, and the capstan 10216 replaces the function of the driving component by a pull rope 10222 wound thereon, in order to prevent the rotation of the capstan 10216 from interfering with surrounding personnel, endoscope pipelines or other environmental items, the one-way bearing 10219 is used to prevent the capstan 10216 from rotating during normal use of the connection structure. In this application, it is advisable to adopt a solution in which the above two processes are realized in the same rotation direction of the worm wheel 10209. When the capstan 10216 is operated by the pull rope 10222, the capstan 10216 drives the worm wheel 10209 to rotate in the opposite direction relative to the rotation direction.

[0086] Embodiment 2:

[0087] This embodiment is further refined on the basis of embodiment 1:

[0088] As a specific installation method of the ball plunger 10208, it also includes a bushing 10203 fixed on the transmission housing 10201, and the bushing 10203 is an annular structure and is coaxial with the hole;

[0089] A plurality of plunger holes are arranged on the bushing 10203, and the plunger holes are arranged at intervals in the circumferential direction of the bushing 10203. A ball plunger 10208 that can slide along the axis of the plunger hole is arranged in each plunger hole. One end of each plunger hole close to the axis of the channel is a reduced diameter hole, and the reduced diameter hole is used to constrain the ball plunger 10208 in the plunger hole. The ball head end can extend from the reduced diameter hole into the channel and retract from the reduced diameter hole into the plunger hole. A return spring that provides elastic support for the ball plunger 10208 is arranged in each plunger hole.

[0090] Before the side wall of the light guide 2 squeezes the ball end, the return spring supports the ball plunger 10208 so that the ball end extends into the hole;

[0091] The ball plunger 10208 is located at the same axial position of the channel, and the groove is an annular groove located on the side of the light guide part 2 and coaxial with the light guide part 2.

[0092] In this scheme, it can be set that the transmission box 10201 has a circular ring structure and a cavity structure, the cavity structure is used to install the driving component, and the space surrounded by the circular ring structure serves as the installation space of the worm gear 10209, the first bearing 10204 and the bushing 10203, that is, the worm gear 10209, the first bearing 10204 and the bushing 10203 serve as the inner layer structure of the circular ring structure, and the space inside the inner layer structure forms the channel. In this solution, the bushing 10203 serves as the installation base for the ball plunger 10208 and the return spring, that is, the return spring is used to provide the ball plunger 10208 with a force toward the axis of the channel, such as one end of the return spring is supported on the inner wall of the annular structure, and the other end of the return spring is supported on the ball plunger 10208. The reduced diameter opening is the end at which the plunger hole is reduced in diameter to prevent the ball plunger 10208 from escaping from the inner opening of the plunger hole. When the inner side of the ball plunger 10208 is not squeezed, the return spring squeezes the ball plunger 10208 into a position consistent with the reduced diameter. The hole openings are against each other. At this time, the ball head end extends out from the reduced diameter hole opening into the channel. When the light guide part 2 enters the channel, the ball head end is pushed by the side of the light guide part 2, and the ball head plunger 10208 is squeezed into the plunger hole under the normal force exerted on the ball head end. When the light guide part 2 continues to move forward until the groove is opposite to the ball head plunger 10208, the return spring pushes the ball head plunger 10208, so that the ball head end is embedded in the groove. At this time, the vibration and sound caused by the ball head end hitting the light guide part 2, or the resistance to further forward movement of the light guide part 2, can be judged as the light guide part 2 is inserted into a preliminary fixed state.

[0093] It is configured that a plurality of ball head plungers 10208 located at the same axial position of the channel are arranged at different positions in the circumferential direction of the channel through a plurality of plunger holes, and the groove is an annular groove coaxial with the light guide part 2 on the side of the light guide part 2. In this way, during the process of completing the initial fixation of the light guide part 2, when there are ball head plungers 10208 on each side of a pair of opposite sides of the channel, the coaxiality of the light guide column and the channel can be adjusted by supporting the light guide column with ball head plungers 10208 in different orientations, and at the same time, each ball head plunger 10208 can be synchronously embedded In the annular groove, the locking assembly 102 utilizes the multi-point support provided for the light guide part 2 to maintain the coaxiality of the initial fixed light guide part 2, as well as the relative position of the first guide boss 203 and the second guide boss 10223 in the axial direction of the channel, which is beneficial to the reliability of the subsequent locking assembly 102 locking the light guide part 2 and ensuring the connection quality of the light guide part 2 on the cold light source host 1. The groove implementation method of the annular groove enables a single annular groove to adapt to all ball head plungers 10208, so this solution also has the characteristics of convenient processing and preparation.

[0094] In the above scheme, the ball plunger 10208 and the return spring are first and then embedded into the plunger hole from the outer opening of the plunger hole, and then the formed assembly is assembled to the inner side of the annular structure to complete the installation of the ball plunger 10208 on the transmission housing 10201, so the above structural form is easy to assemble. The reduced diameter opening is located at one end of the plunger hole close to the axis of the channel, which is a preferred scheme for the position adaptation of the reduced diameter opening, and is intended to reduce the shaking of the ball end during use by constraining the side wall of the reduced diameter opening on the side wall of the ball end. When the technicians in this field set the reduced diameter hole on the plunger hole to constrain the ball plunger 10208 at other positions of the plunger hole, it should also be considered that the concept is essentially the same as that of this scheme.

[0095] Embodiment 3:

[0096] This embodiment is further refined on the basis of embodiment 1:

[0097] As a specific implementation of the driving assembly, the driving assembly includes a worm 10210 installed in the transmission housing 10201 and meshing with the worm wheel 10209, and also includes a driving motor 10211 for driving the worm 10210 to rotate;

[0098] A capstan 10216 is coaxially mounted on the worm 10210 via a one-way bearing 10219 . A pull rope 10222 is wound around the capstan 10216 . When the pull rope 10222 is pulled out from the capstan 10216 , the capstan 10216 transmits torque to the worm 10210 via the one-way bearing 10219 .

[0099] In this scheme, the worm 10210 drives the worm wheel 10209 to rotate under the action of the driving motor 10211. According to the misalignment angle of the first guide cam and the second guide cam when the light guide part 2 is inserted, when the second guide cam rotates by the first angle, the second guide cam pushes the first guide cam and causes the light guide part 2 to move to the set position. When continuing to rotate in the same direction by the second angle, the second guide cam and the first guide cam are misaligned so that the light guide part 2 can be pulled out. The one-way bearing 10219 does not transmit torque to the capstan 10216 during the above process to avoid instability caused by the rotation of the capstan 10216. When the driving motor 10211 is damaged, the worm 10210 is driven to rotate by pulling the cable. The rotation direction of the worm 10210 under the action of the capstan 10216 is opposite to the rotation direction of the worm 10210 under the action of the driving motor 10211, thereby achieving the function of using the pull rope 10222 and the capstan 10216 to urgently replace the driving motor 10211. In order to facilitate the precise control of the rotation angle of the worm gear 10209, the drive motor 10211 is preferably a servo motor or a stepper motor. In order to ensure the reliability of the function of the winch 10216, the pull rope 10222 is preferably a steel wire rope.

[0100] Embodiment 4:

[0101] This embodiment is further refined on the basis of Embodiment 3:

[0102] In order to enable the pull rope 10222 to be automatically reeled in after the winch 10216 performs emergency driving on the worm 10210, it also includes a coil spring 10221 with one end acting on the winch 10216 and the other end acting on the transmission box 10201.

[0103] In this solution, the coil spring 10221 stores energy when the winch 10216 rotates. When the pull rope 10222 is released, the winch 10216 reverses under the action of the coil spring 10221 to reel in the pull rope 10222, thereby preparing for the next use of the winch 10216 and tidying up the on-site environment; at the same time, the constraint of the coil spring 10221 on the winch 10216 can ensure the stability of the winch 10216 when it is not in use. Preferably, in order to facilitate the pulling control of the pull rope 10222 and stabilize the state of the winch 10216 when reeling in the pull rope 10222, the coil spring 10221 is a constant force spring. In a specific implementation, the driving motor 10211 is fixed to the outside of the transmission housing 10201 through the motor mounting plate 10212, the coil spring 10221 acts on the transmission housing 10201 through the second spring support 10217, and the two ends of the worm 10210 are respectively provided with a second bearing 10213 and a third bearing 10215 for supporting the worm 10210 in the transmission housing 10201, and the one-way bearing 10219 is fixed on the axis of the worm 10210 by a shaft retaining ring 10220 installed on the worm 10210. The above bearings are all equipped with a bearing support 10214, and the coaxiality of the worm 10210 and the capstan 10216 is maintained by a wider one-way bearing 10219, and can also be achieved by using the one-way bearing 10219 and a friction reducing ring 10218 installed between the capstan 10216 and the worm 10210.

[0104] Embodiment 5:

[0105] This embodiment is further refined on the basis of embodiment 1:

[0106] In order to prevent the light guide 2 from being skewed relative to the channel / plug-in hole due to the force of the baffle 10207 on the head end 202 of the light guide 2, the number of the baffles 10207 is greater than 1, and each baffle 10207 is configured with a compression spring 10205, and the baffles 10207 are symmetrical with respect to the axis of the channel. Specifically, as the light guide 2 is further inserted into the cold light source host 1, in the process of the force of the baffle 10207 on the light guide 2 continuing to increase, if the effect of the reset spring on the light guide 2 cannot effectively cope with the skew of the light guide 2, it may affect the connection quality of the light guide 2. In this solution, the baffles 10207 are arranged symmetrically relative to the axis of the channel, so that the skew effects of the baffles 10207 on the head end 202 can offset each other, so as to achieve the purpose of ensuring the plug-in quality of the light guide 2 on the cold light source host 1. As mentioned above, the first spring support 10206 can compress the spring 10205. The scheme for adjusting the support position, when applied to the present scheme, can be achieved by adjusting the first spring support 10206, such as the compression spring 10205 is supported on the first spring support 10206, the axis of the first spring support 10206 is parallel to the axis of the channel, the first spring support 10206 is threadedly connected to the box cover 10202, and by rotating the first spring support 10206, the support state of the compression spring 10205 on the back side of each baffle 10207 can be adapted to adapt to the force exerted by the baffle 10207 on the head end 202 of the light guide part 2 during the process of the light guide part 2 extending into the channel.

[0107] Embodiment 6:

[0108] This embodiment is further refined on the basis of embodiment 1:

[0109] As a technical solution in which after the light guide 2 is initially fixed, the present solution can automatically perform further pushing action, and after the light guide 2 reaches the set position, the locking assembly 102 can automatically stop the action to lock the light guide 2, and also includes a sensor for detecting the insertion depth of the light guide 2 in the plug hole, and the sensor is data-connected with the control module of the drive assembly;

[0110] When the sensor identifies that the ball plunger 10208 is embedded in the groove, the driving assembly drives the worm wheel 10209 to rotate under the control of the control module. After the second guide boss 10223 rotates with the worm wheel 10209 until it is pressed against the first guide boss 203, the second guide boss 10223 pushes the first guide boss 203 through the guide surface thereon, and the light guide portion 2 is further inserted into the channel along with the first guide boss 203.

[0111] When the sensor identifies that the insertion depth of the light guide 2 in the insertion hole reaches a set position, the driving component stops moving under the control of the control module.

[0112] In the above scheme, the sensor is used to detect the insertion depth of the light guide 2 in the plug hole. The sensor transmits the insertion depth detection result to the control module through the data connection with the control module. After the sensor's detection result determines that the initial fixation is completed, the drive component is activated, and the worm gear 10209 is used to pull the light guide 2 so that it is further inserted into the plug hole; after the sensor recognizes that the set position is reached, the drive component stops the action, and the baffle 10207 and the first guide boss 203 are used to maintain the locking state of the light guide 2. Further, when the locking component 102 performs the action of releasing the light guide 2, the corresponding instruction can be provided to the control module of the locking component 102 by operating, for example, the button 201 on the light guide 2, the human-machine interaction screen of the endoscope or other input devices, and the locking component 102 performs the action of releasing the light guide 2 under the instruction.

[0113] Embodiment 7:

[0114] This embodiment is further refined on the basis of Embodiment 6:

[0115] As a sensor implementation method with a simple structure and reliable detection results, the sensor includes a photoelectric sensor 10101 and a photoelectric baffle 10102. The photoelectric sensor 10101 obtains different inspection results according to different swing angles of the photoelectric baffle 10102.

[0116] The photoelectric baffle 10102 is arranged in the plug-in hole, and the light guide part 2 pushes the photoelectric baffle 10102 to swing through the optical fiber tube at its front end.

[0117] In the above scheme, as the insertion depth of the light guide part 2 in the plug-in hole / channel increases, when the optical fiber tube at the front end of the light guide part 2 pushes on the photoelectric baffle 10102, the photoelectric baffle 10102 is forced to swing at a certain angle, and the swing angle increases with the increase of the insertion depth. In this way, the photoelectric baffle 10102 is used to adjust the transmission, blocking, reflection or interference of light, etc., and by utilizing the relationship between the swing angle and the insertion depth, the insertion depth of the light guide part 2 in the plug-in hole can be obtained by using different detection results of the photoelectric sensor 10101 at different swing angles of the photoelectric baffle 10102. In the present solution, the state of the photoelectric baffle 10102 is associated with the insertion depth of the optical fiber tube, which is different from using the optical fiber tube as the only structure affecting the light field. It is determined by the structure and surface condition of the head end of the optical fiber tube. During the further insertion of the optical fiber tube, the effects of different insertion depths on the light field may be the same. Therefore, sensors only including the light emitting end and the light receiving end may not be able to reliably measure the change of the light guide part 2 from the initial fixed position to the set position. In the present solution, the photoelectric baffle 10102 is used as a light field interference component and is linked to the light guide part 2, which can effectively solve the above problem with a simple structure.

[0118] Embodiment 8:

[0119] This embodiment is further refined on the basis of embodiment 1:

[0120] In order to obtain multiple action positions on the worm gear 10209 for pushing the light guide 2 to further insert into the cold light source host 1, the number of the first guide bosses 203 and the second guide bosses 10223 is greater than 1, and the number of the first guide bosses 203 is equal to the number of the second guide bosses 10223;

[0121] The first guide bosses 203 are located at the same axial position of the light guide portion 2 and are evenly distributed in the circumferential direction of the light guide portion 2, and the second guide bosses 10223 are located at the same axial position of the hole and are evenly distributed in the circumferential direction of the hole;

[0122] During the rotation of the worm gear 10209 relative to the light guiding part 2, when the second guide boss 10223 rotates to be squeezed against the first guide boss 203, the first guide boss 203 and the second guide boss 10223 cooperate one by one, and each second guide boss 10223 pushes the first guide boss 203 cooperating with it to move in the direction of the plug-in hole, and each first guide boss 203 has the same movement speed.

[0123] In the above scheme, after the light guide part 2 is inserted straight into the hole, as the worm gear 10209 drives the first guide boss 203 to rotate, during the rotation process, each first guide boss 203 acts synchronously with the corresponding second guide boss 10223 to form the action position and make the action position evenly distributed in the circumferential direction of the hole, and by evenly pushing the light guide part 2 in the circumferential direction of the hole, the light guide part 2 is forced to further penetrate the hole in a stable posture. As a person skilled in the art, in order to achieve the same movement speed, the purpose can be achieved by configuring the configuration of the corresponding guide surface. For the convenience of preparation, the shapes of the first guide bosses 203 and the second guide bosses 10223 are the same.

[0124] Embodiment 9:

[0125] This embodiment is further refined on the basis of Embodiment 8:

[0126] In order to better stabilize the relative position of the first guide boss 203 and the second guide boss 10223 so as to maintain the reliability of the locking assembly 102 locking the light guide portion 2, one of the mating surface on the first guide boss 203 for mating with the second guide boss 10223 and the mating surface on the second guide boss 10223 for mating with the first guide boss 203 is a continuous curved surface with a depression, and the other is a continuous curved surface with a protrusion.

[0127] The first guide boss 203 and the second guide boss 10223 can rotate relative to each other so that the protrusion is embedded in the depression.

[0128] In this scheme, the groove can be arranged on one of the two, and the protrusion is arranged on the other of the two. In specific application, it is set as follows: when the protrusion is embedded in the recess, the light guide part 2 is inserted into the cold light source host 1 to reach the set position. At this time, the mutual limiting effect of the groove and the protrusion under the pushing of the baffle 10207 is utilized to increase the resistance to the rotation of the worm gear 10209, thereby achieving the purpose of ensuring the reliability; further, the matching form of the protrusion and the recess will make the worm gear 10209 have a load inflection point when rotating, such as the load of the worm gear 10209 is reduced when the protrusion enters the groove, and the load of the worm gear 10209 is increased when the protrusion escapes from the groove. Therefore, this scheme provides a structural basis for determining whether the worm gear 10209 is rotated to a suitable angle (at which the light guide part 2 is pushed to the set position) by monitoring the power parameters of the drive motor 10211.

[0129] Embodiment 10:

[0130] Based on Example 1, this embodiment, as a specific application of the connection structure between the endoscope light guide part 2 and the cold light source host 1, also relates to an endoscope, which includes the connection structure between the endoscope light guide part 2 and the cold light source host 1 as described in any one of the above items.

[0131] The above contents are further detailed descriptions of the present invention in combination with specific preferred embodiments, and it cannot be determined that the specific embodiments of the present invention are limited to these descriptions. For ordinary technicians in the technical field to which the present invention belongs, other embodiments obtained without departing from the technical solution of the present invention should be included in the protection scope of the present invention.

Claims

1. A connection structure between an endoscope light guide and a cold light source host, comprising a cold light source host (1) and a light guide (2), wherein a host body (101) of the cold light source host (1) is provided with a plug hole for plugging the light guide (2), and further comprising a locking assembly (102) for locking the light guide (2) on the cold light source host (1), characterized in that: The locking assembly (102) comprises a transmission housing (10201) fixed to a housing of a main body (101), the transmission housing (10201) being provided with a hole coaxial with the plug hole, a ball plunger (10208) being provided on the hole wall of the hole, one end of the ball plunger (10208) facing the axis of the hole being a ball end, and the other end of the ball plunger (10208) being elastically supported on the transmission housing (10201); It also includes a worm wheel (10209) mounted on the transmission housing (10201) and coaxial with the hole, wherein a second guide boss (10223) protruding to the inner side of the worm wheel (10209) is fixed on the worm wheel (10209); Also included is a driving assembly mounted on the transmission housing (10201) and used to drive the worm gear (10209) to rotate around the axis of the worm gear (10209); The outer wall of the light guide portion (2) is provided with a groove for embedding the ball head end, and the outer wall of the light guide portion (2) is also provided with a first guide boss (203); When the light guide portion (2) is inserted into the hole until the ball end is embedded in the groove, the second guide boss (10223) and the first guide boss (203) are located at the same axial position of the hole; After the second guide boss (10223) rotates with the worm wheel (10209) until it is mutually compressed with the first guide boss (203), the second guide boss (10223) pushes the first guide boss (203) via the guide surface thereon, and causes the light guide portion (2) to further penetrate into the hole along with the first guide boss (203); It also includes a baffle (10207) supported on the main body (101) or the box cover (10202) by a compression spring (10205), wherein the baffle (10207) is located in the channel, and when the light guide portion (2) further penetrates into the channel, the head end (202) of the light guide portion (2) is supported on the baffle (10207), and the baffle (10207) forces the compression spring (10205) to produce compression deformation under the push of the head end (202).

2. The connection structure between the light guide part of an endoscope and a cold light source host according to claim 1, characterized in that: It also includes a bushing (10203) fixed on the transmission housing (10201), wherein the bushing (10203) is an annular structure and is coaxial with the hole; A plurality of plunger holes are arranged on the bushing (10203), and the plunger holes are arranged at intervals in the circumferential direction of the bushing (10203). A ball plunger (10208) that can slide along the axis of the plunger hole is arranged in each plunger hole. One end of each plunger hole close to the axis of the channel is a reduced diameter hole, and the reduced diameter hole is used to constrain the ball plunger (10208) in the plunger hole. The ball end can extend from the reduced diameter hole into the channel and retract from the reduced diameter hole into the plunger hole. A return spring that provides elastic support for the ball plunger (10208) is arranged in each plunger hole. Before the side wall of the light guide portion (2) squeezes the ball head end, the return spring supports the ball head plunger (10208) so that the ball head end extends into the hole; The ball head plunger (10208) is located at the same axial position of the channel, and the groove is an annular groove located on the side of the light guide portion (2) and coaxial with the light guide portion (2).

3. The connection structure between the light guide part of an endoscope and a cold light source host according to claim 1, characterized in that: The driving assembly comprises a worm (10210) installed in the transmission housing (10201) and meshing with the worm wheel (10209), and also comprises a driving motor (10211) for driving the worm (10210) to rotate; A capstan (10216) is coaxially mounted on the worm (10210) via a one-way bearing (10219), and a pull rope (10222) is wound around the capstan (10216). When the pull rope (10222) is pulled out from the capstan (10216), the capstan (10216) transmits torque to the worm (10210) via the one-way bearing (10219).

4. The connection structure between the light guide part of an endoscope and a cold light source host according to claim 3, characterized in that: It also includes a coil spring (10221) with one end acting on the capstan (10216) and the other end acting on the transmission housing (10201).

5. The connection structure between the light guide part of an endoscope and a cold light source host according to claim 1, characterized in that: The number of the baffles (10207) is greater than 1, each baffle (10207) is configured with a compression spring (10205), and the baffles (10207) are symmetrical with respect to the axis of the channel.

6. The connection structure between the light guide part of an endoscope and a cold light source host according to any one of claims 1 to 5, characterized in that: It also includes a sensor for detecting the insertion depth of the light guide portion (2) in the plug hole, the sensor being data-connected to a control module of the drive assembly; When the sensor identifies that the ball plunger (10208) is embedded in the groove, the drive assembly drives the worm wheel (10209) to rotate under the control of the control module, and after the second guide boss (10223) rotates with the worm wheel (10209) until it is pressed against the first guide boss (203), the second guide boss (10223) pushes the first guide boss (203) through the guide surface thereon, and causes the light guide portion (2) to further penetrate into the hole along with the first guide boss (203); When the sensor identifies that the insertion depth of the light guide portion (2) in the plug hole reaches a set position, the drive component stops moving under the control of the control module.

7. The connection structure between the light guide part of an endoscope and a cold light source host according to claim 6, characterized in that: The sensor comprises a photoelectric sensor (10101) and a photoelectric baffle (10102), wherein the photoelectric sensor (10101) obtains different inspection results according to different swing angles of the photoelectric baffle (10102); The photoelectric baffle (10102) is arranged in the plug-in hole, and the light guide portion (2) pushes the photoelectric baffle (10102) to swing through the optical fiber tube at its front end.

8. The connection structure between the light guide part of an endoscope and a cold light source host according to claim 1, characterized in that: The number of the first guide bosses (203) and the number of the second guide bosses (10223) are both greater than 1, and the number of the first guide bosses (203) is equal to the number of the second guide bosses (10223); The first guide bosses (203) are located at the same axial position of the light guide portion (2) and are evenly distributed in the circumferential direction of the light guide portion (2), and the second guide bosses (10223) are located at the same axial position of the hole and are evenly distributed in the circumferential direction of the hole; During the rotation of the worm gear (10209) relative to the light guide portion (2), when the second guide bosses (10223) rotate to mutually squeeze the first guide bosses (203), the first guide bosses (203) and the second guide bosses (10223) cooperate one by one, and each second guide boss (10223) pushes the first guide boss (203) that cooperates with it to move in the direction of the plug-in hole, and each first guide boss (203) has the same movement speed.

9. The connection structure between the light guide part of an endoscope and a cold light source host according to claim 8, characterized in that: One of the mating surface on the first guide boss (203) used to match with the second guide boss (10223) and the mating surface on the second guide boss (10223) used to match with the first guide boss (203) is a continuous curved surface with a depression thereon, and the other is a continuous curved surface with a protrusion thereon; The first guide boss (203) and the second guide boss (10223) can rotate relative to each other so that the protrusion is embedded in the recess.

10. An endoscope, characterized in that: It comprises a connection structure between an endoscope light guide part and a cold light source host as described in any one of claims 1 to 9.

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