Auto focus lens mount and endoscope apparatus

Abstract

The utility model relates to medical instrument technical field especially, more particularly to a kind of automatic focusing lens mount and endoscope equipment, the automatic focusing lens mount includes: lens barrel, fixed focus lens group and focusing lens group are separately provided in lens barrel inside along the axial direction of lens barrel;Drive module, drive module includes motor and drive circuit, motor is used to drive focusing lens group and move along the axial direction of lens barrel, to make focusing lens group close or away from fixed focus lens group;Drive circuit is connected with camera mainframe and motor respectively, drive circuit is used to receive focusing signal sent by camera mainframe, and focusing signal is converted into drive signal transmission to motor and drives.Compared with the existing need user manual adjustment focusing lens mount to complete focusing, the utility model can be focused by motor, and user experience is improved.

Description

Technical Field

[0001] This utility model relates to the field of medical device technology, and in particular to an autofocus lens mount and endoscope device. Background Technology

[0002] Endoscopic technology is widely used in medical diagnosis and minimally invasive surgery, and one of its core functions is to provide clear medical images. To achieve this, endoscopic devices are typically equipped with focusing capabilities to ensure clear images are obtained at different depths and angles.

[0003] Existing endoscopic equipment generally includes an endoscope, a camera, and a camera host. The endoscope and the camera are connected by a focusing lens mount. Users can achieve focus by manually adjusting the focusing lens mount, which results in a poor user experience. Utility Model Content

[0004] The main purpose of this utility model is to provide an autofocus lens mount and endoscope device, which aims to solve the technical problem that the user needs to manually adjust the focusing lens mount to achieve focusing in the prior art, resulting in a poor user experience.

[0005] To achieve the above objectives, this utility model proposes an autofocus lens mount, which includes:

[0006] The lens barrel has a fixed-focus lens group and a focusing lens group spaced apart along the axial direction inside the lens barrel.

[0007] The drive module includes a motor and a drive circuit. The motor drives the focusing lens group to move along the axial direction of the lens barrel so that the focusing lens group moves closer to or away from the fixed-focus lens group. The drive circuit is connected to both the camera host and the motor. The drive circuit receives the focusing signal sent by the camera host and converts the focusing signal into a drive signal, which is then transmitted to the motor for driving.

[0008] In one embodiment, the motor is disposed outside the lens barrel, and the drive module further includes a lead screw and a lead screw nut. The lead screw is driven to the output shaft of the motor, and the lead screw nut is sleeved on the lead screw and connected to the focusing lens assembly.

[0009] In one embodiment, the driving circuit includes: a first driving board interface, a motor driving chip, and a motor interface;

[0010] The first driver board interface is connected to the camera host and the motor driver chip. The first driver board interface is used to transmit the focus signal sent by the camera host to the motor driver chip.

[0011] The motor driver chip is connected to the motor through the motor interface. The motor driver chip is used to convert the focus signal into a drive signal and transmit it to the motor through the motor interface for driving.

[0012] In one embodiment, the driving circuit further includes: a first power supply module;

[0013] The first power supply module is connected to the first driver board interface and the motor driver chip. The first power supply module is used to transmit the first power received by the first driver board interface to the motor driver chip for power supply.

[0014] In one embodiment, the first power supply module includes: a first inductor, a second inductor, and a first capacitor to a third capacitor;

[0015] The first terminal of the first capacitor is connected to the first driver board interface, the first terminal of the first inductor, and the first terminal of the second inductor, respectively. The second terminal of the first capacitor is grounded. The second terminal of the first inductor is connected to the second terminal of the second capacitor and the first power supply terminal of the motor driver chip, respectively. The second terminal of the second capacitor is grounded. The second terminal of the second inductor is connected to the first terminal of the third capacitor and the second power supply terminal of the motor driver chip, respectively. The second terminal of the third capacitor is grounded.

[0016] In one embodiment, the autofocus lens mount further includes: an encoder and a feedback circuit;

[0017] The encoder is connected to the feedback circuit. The encoder is used to acquire the rotational position of the motor and transmit the generated feedback signal to the feedback circuit.

[0018] The feedback circuit is connected to the camera host and is used to transmit the feedback signal to the camera host so that the camera host generates an adjustment signal based on the feedback signal and transmits it to the drive circuit.

[0019] The drive circuit is also used to convert the adjustment signal into the drive signal and transmit it to the motor for driving.

[0020] In one embodiment, the feedback circuit includes: an encoder interface and a second driver board interface;

[0021] The encoder interface is connected to the encoder and the second driver board interface. The encoder interface is used to receive the feedback signal sent by the encoder and transmit the feedback signal to the second driver board interface.

[0022] The second driver board interface is connected to the camera host, and the second driver board interface is used to transmit the feedback signal to the camera host.

[0023] In one embodiment, the feedback circuit further includes: a second power supply module;

[0024] The second power supply module is connected to the second drive board interface and the second drive board interface. The second power supply module is used to transmit the second power received by the second drive board interface to the encoder for power supply.

[0025] In one embodiment, the second power supply module includes: a fourth capacitor and a third inductor;

[0026] The first end of the fourth capacitor is connected to the second driver board interface and the first end of the third inductor, respectively. The second end of the fourth capacitor is grounded, and the second end of the third inductor is connected to the power supply terminal of the second driver board interface.

[0027] In addition, to achieve the above objectives, this utility model also proposes an endoscope device, which includes: an endoscope, a camera, a camera host, and an autofocus lens mount as described above.

[0028] The endoscope is detachably connected to the camera via the autofocus lens mount.

[0029] The camera is connected to the camera host via a cable.

[0030] This invention discloses an autofocus lens mount and an endoscope device. The autofocus lens mount includes: a lens barrel, inside which a fixed-focus lens group and a focusing lens group are spaced apart along the axial direction; a drive module, which includes a motor and a drive circuit. The motor drives the focusing lens group to move along the axial direction of the lens barrel, so that the focusing lens group moves closer to or away from the fixed-focus lens group. The drive circuit is connected to both the camera host and the motor. The drive circuit receives a focusing signal sent by the camera host and converts the focusing signal into a drive signal, which is then transmitted to the motor for driving. Because the autofocus lens mount of this invention can be equipped with a drive module that drives the focusing lens group closer to or away from the fixed-focus lens group, and the motor is connected to the camera host via the drive circuit, the drive circuit converts the focusing signal sent by the camera host into a drive signal and transmits it to the motor, thereby enabling the motor to control the focusing lens group to move closer to or away from the fixed-focus lens group to complete focusing. Compared to existing lenses that require users to manually adjust the focus mount, this invention uses a motor for focusing, thus improving the user experience. Attached Figure Description

[0031] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0032] Figure 1 This is a schematic diagram of the structure of the first embodiment of the autofocus lens mount proposed in this utility model.

[0033] Figure 2 This is a schematic diagram of the autofocus process in the first embodiment of the autofocus lens mount proposed in this utility model.

[0034] Figure 3 This is a structural block diagram of the drive circuit in the second embodiment of the autofocus lens mount proposed in this utility model.

[0035] Figure 4 This is a circuit diagram of the first drive board interface in the second embodiment of the autofocus lens mount proposed in this utility model.

[0036] Figure 5 The circuit diagram of the motor drive chip and the first power supply module in the second embodiment of the autofocus lens mount proposed in this utility model embodiment is shown.

[0037] Figure 6 This is a circuit diagram of the motor interface in the second embodiment of the autofocus lens mount proposed in this utility model.

[0038] Figure 7 This is a structural block diagram of the feedback circuit in the third embodiment of the autofocus lens mount proposed in this utility model.

[0039] Figure 8 The circuit diagram of the second drive interface and encoder interface in the third embodiment of the autofocus lens mount proposed in this utility model embodiment;

[0040] Figure 9 The circuit diagram of the second power supply module in the third embodiment of the autofocus lens mount proposed in this utility model embodiment;

[0041] Figure 10 This is a circuit diagram of the pull-up module in the third embodiment of the autofocus lens mount proposed in this utility model.

[0042] Explanation of icon numbers:

[0043]

[0044]

[0045] The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0046] It should be understood that the specific embodiments described herein are merely illustrative of the present invention and are not intended to limit the present invention.

[0047] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0048] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in this utility model embodiment are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.

[0049] Furthermore, the use of terms such as "first" and "second" in this utility model is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the technical solutions of the various embodiments can be combined with each other, but only on the basis of being achievable by those skilled in the art. If the combination of technical solutions is contradictory or impossible to implement, the user should consider such a combination of technical solutions to be non-existent and not within the scope of protection claimed by this utility model.

[0050] It should be noted that endoscopic technology is widely used in medical diagnosis and minimally invasive surgery, and one of its core functions is to provide clear medical images. To achieve this, endoscopic devices are typically equipped with focusing capabilities to ensure clear images are obtained at different depths and angles.

[0051] Existing endoscopic equipment generally includes an endoscope, a camera, and a camera host. The endoscope and the camera are connected by a focusing lens mount. Users can achieve focus by manually adjusting the focusing lens mount, which results in a poor user experience.

[0052] To address the aforementioned technical issues, this embodiment provides an autofocus lens mount. This autofocus lens mount may include a drive module that drives the focusing lens group to move closer to or further away from the fixed-focus lens group. A drive circuit connects a motor to the camera host, converting the focusing signal sent by the camera host into a drive signal and transmitting it to the motor. This allows the motor to control the focusing lens group to move closer to or further away from the fixed-focus lens group to achieve focusing. Compared to existing lens mounts that require manual adjustment by the user, this embodiment uses a motor for focusing, improving the user experience.

[0053] For ease of understanding, the following is combined with Figures 1 to 10 The autofocus lens mount provided in the embodiments of this application will be described in detail.

[0054] Reference Figure 1 , Figure 1 This is a schematic diagram of the structure of the first embodiment of the autofocus lens mount proposed in this utility model.

[0055] like Figure 1 As shown, in this embodiment, the autofocus lens mount may include: a housing 1, a lens mount 2, and a camera mount 3.

[0056] It should be noted that the aforementioned endoscope body bayonet 2 and camera bayonet 3 can be respectively disposed on both sides of the housing 1. The endoscope body bayonet 2 can be detachably connected to the endoscope sight glass, and its structure can match the connection point of the endoscope sight glass, for example, it may include multiple flanges and grooves. A locking mechanism can also be provided at the endoscope body. Figure 1 (Not shown in the image) For example, a spiral buckle, quick-release plate, or pin can be used to fix the lens body through the locking mechanism to ensure a firm connection between the lens body and the lens body bayonet 2.

[0057] In this embodiment, the camera mount 3 can be used for detachable connection with the camera 10, and the structure of the camera mount 3 can be matched with the interface specifications of the camera 10. A fixing screw can also be provided at the camera mount 3. Figure 1 (Not shown in the figure) is used to fix the camera 10 and the camera mount 3. Of course, detachable connection can also be achieved in other ways, and this embodiment does not limit this.

[0058] It should also be noted that the autofocus lens mount in this embodiment may further include: a lens barrel 4, wherein a fixed-focus lens group 5 and a focusing lens group 6 are provided at intervals along the axial direction of the lens barrel 4.

[0059] Continue as Figure 1As shown, the lens barrel 4 can be disposed within the housing 1, and a fixed-focus lens group 5 and a focusing lens group 6 can be spaced apart along the axial direction of the lens barrel 4 inside the lens barrel 4. The fixed-focus lens group 5 can be a stationary optical component in this embodiment, used to form a clear image at a specific focal length. The focusing lens group 6 can be movable along the axial direction of the lens barrel 4 in this embodiment to adjust the focal length. In this embodiment, both the fixed-focus lens group 5 and the focusing lens group 6 can contain several lenses; the specific structure can be set according to the actual usage scenario, and this embodiment does not impose any limitations on this.

[0060] It should be emphasized that in this embodiment, the fixed-focus lens group 5 can be disposed inside the lens barrel 4 near the lens mount 2, and the focusing lens group 6 can be disposed inside the lens barrel 4 near the camera mount 3. Furthermore, in this embodiment, to improve the imaging effect, the following... Figure 1 As shown, the focusing lens group 6 may include a first focusing module 61 and a second focusing module 62. The first focusing module 61 and the second focusing module 62 are both arranged at intervals along the axial direction of the lens barrel 4 inside the lens barrel 4, and the first focusing module 61 is disposed between the fixed-focus lens group 5 and the second focusing module 62. The specific internal lens structure is not limited in this embodiment.

[0061] Furthermore, continue as Figure 1 As shown, in this embodiment, the autofocus lens mount may further include: a light sensor 7 and a protective glass 8;

[0062] The aforementioned light sensor 7 can be disposed on one side of the housing 1 where the camera mount 3 is installed. The light sensor 7 can be disposed close to the camera 10, that is, a second focusing module 62 can be disposed at intervals on one side of the light sensor 7, and the camera 10 can be disposed on the other side. The light sensor 7 can collect the brightness information of the current image captured by the camera 10. The aforementioned protective glass 8 can be disposed on one side of the housing 1 where the lens mount 2 is installed, specifically between the fixed-focus lens group 5 and the lens mount 2. It can be used to protect the lens inside the lens barrel 4 from physical damage, and the protective glass 8 can be transparent, so as to transmit the current image captured by the camera 10.

[0063] Furthermore, continue as Figure 1 As shown, in order to achieve autofocus, the aforementioned autofocus lens mount may also include:

[0064] Drive module 9, the drive module 9 includes a motor 93 and a drive circuit 91 ( Figure 1 (Not shown), the motor 93 drives the focusing lens group 6 to move along the axial direction of the lens barrel 4, so that the focusing lens group 6 moves closer to or further away from the fixed-focus lens group 5;

[0065] The drive circuit 91 is connected to both the camera host and the motor 93. The drive circuit 91 is used to receive the focus signal sent by the camera host and convert the focus signal into a drive signal to be transmitted to the motor 93 for driving.

[0066] It should also be emphasized that, in this embodiment, the drive module 9 can be disposed within the aforementioned housing 1. Figure 1 The motor 93 can be located at the top of the lens barrel 4 inside the outer casing 1. In this embodiment, the motor 93 can be located at any position that can drive the focusing lens group 6 to move along the axial direction of the lens barrel 4, and for ease of control, the motor 93 in this embodiment can be a stepper motor.

[0067] It should be understood that, in order to connect the drive circuit 91 to the camera host, the autofocus lens mount in this embodiment is also provided with an interface, and the camera host can be provided with an interface, so that the interface on the autofocus lens mount can be connected to the interface on the camera host to achieve electrical connection.

[0068] It should be noted that the aforementioned focusing signal can be a signal indicating that focusing is required. The aforementioned driving signal can be a signal that drives the aforementioned motor 93 to rotate. In this embodiment, a focusing button (e.g., a focus increase button and a focus decrease button) can be provided on the camera host. This focusing button can be connected to the aforementioned driving circuit 91. When the user presses the focusing button, a focusing signal is generated and transmitted to the driving circuit 91. The driving circuit 91 then converts the focusing signal into a driving signal and transmits it to the motor 93. The motor 93 rotates, causing the focusing lens group 6 to move closer to or further away from the fixed-focus lens group 5 along the lens barrel 4 axis, thus completing focusing. This eliminates the need for the user to manually adjust the focusing lens mount, improving the user experience.

[0069] However, as another implementation, to achieve automatic focusing, the camera host in this embodiment can also generate a focusing signal based on the quality of the current image captured by the camera 10 and transmit it to the drive circuit 91. Specifically, the camera host in this embodiment can be equipped with an image signal processing unit. First, the light signal of the external light of the camera 10 can be captured by the aforementioned light sensor 7, and the light signal is converted into an electrical signal and transmitted to the image signal processing unit in the camera host. The image signal processing unit then performs image processing operations on the electrical signal to obtain a frame of the current image in the video currently captured by the camera 10, and transmits the current image to the monitor connected to the camera host for display. Next, the image signal processing unit can evaluate the clarity of the current image through a preset image clarity evaluation index, and determine whether focusing is needed based on the clarity evaluation result, thereby generating the aforementioned focusing signal and transmitting it to the drive circuit 91. The drive circuit 91 then converts the focusing signal into a drive signal and transmits it to the electrodes for driving, thereby completing automatic focusing. Compared with the existing method where users need to constantly manually adjust the focus, this embodiment can automatically complete focusing, improving work efficiency, reducing the user's operational burden, and improving surgical safety.

[0070] It is understood that the aforementioned preset sharpness evaluation indicators can be set according to actual conditions, such as gradient modulus, Laplacian operator, and wavelet transform indicators, etc., and this embodiment does not impose any restrictions on them. Specifically, to facilitate understanding of the above autofocus process, refer to... Figure 2 , Figure 2 This is a schematic diagram illustrating the autofocus process in the first embodiment of the autofocus lens mount proposed in this utility model. Figure 2 As shown, users can start the autofocus process by pressing the focus button on the camera unit or by other means (i.e., Figure 2 (The focus is initiated by triggering the camera), and then the image signal processing unit in the camera host can acquire the video currently being captured by the camera 10 (i.e., the video). Figure 2 (Acquire video from the camera), extract the image of the current frame from the captured video as the aforementioned current image (i.e. Figure 2 The current frame image is used to calculate the focus value (i.e., the focus value is calculated based on the current image). Figure 2 The focus value is calculated to determine the focus value of the current image, and based on this focus value, it is determined whether the focus is at its peak, i.e., whether the focus peak has been reached. Figure 2 The focus peak is determined by checking if the focus point is at its peak. If so, it indicates that the current sharpness is good enough, and further focusing is unnecessary. Figure 2 (Focusing ends in the middle); if not, it indicates insufficient sharpness, and the camera host generates a focus signal and transmits it to the drive circuit 91 to drive the motor 93 (i.e., ... Figure 2 The lens focuses, the control motor moves, and continues to search for the focus peak, and then reacquires the current image to calculate the focus value;

[0071] Simultaneously, when the focus value reaches the focus peak, the sharpness state can be determined using the aforementioned preset sharpness evaluation indicators (i.e., Figure 2 The system evaluates and judges the blur level of the current frame, and determines whether refocusing is needed based on whether the current sharpness reaches a preset sharpness level. Figure 2 (Whether refocusing is needed); if the sharpness does not reach the preset sharpness level, refocusing can begin; if the sharpness reaches the preset sharpness level, focusing can end.

[0072] It should be emphasized in this embodiment that the above-mentioned evaluation of the sharpness state based on the current image using a preset sharpness evaluation index to generate a focus signal is existing technology, and this embodiment will not elaborate on it. Of course, other methods can also be used to generate a focus signal representing the focusing requirements based on the current image, and this embodiment does not limit this.

[0073] Furthermore, in order to enable the motor 93 to drive the focusing lens group 6 to move, in this embodiment, the motor 93 is located outside the lens barrel 4, and the drive module 9 also includes a lead screw 94 and a lead screw nut 95. The lead screw 94 is connected to the output shaft of the motor 93, and the lead screw nut 95 is sleeved on the lead screw 94 and connected to the focusing lens group 6.

[0074] It should be understood that the motor 93 in this embodiment can be located at any position on the outside of the lens barrel 4. Specifically, as one implementation method, such as Figure 1 In this embodiment, the motor 93 can be fixedly mounted on the top of the outer side of the inner lens barrel 4 of the housing 1, and is correspondingly arranged with the focusing lens group 6. It should be noted that... Figure 1 The motor 93 in the figure is only used as a positional indication and its installation structure and size are not specified.

[0075] It should also be understood that, in this embodiment, the lead screw 94 and lead screw nut 95 can be disposed on the top of the focusing lens assembly 6, and the lead screw 94 can be disposed along the axial direction of the lens barrel 4. Specifically, in order to facilitate driving the focusing lens assembly 6, an opening along the length direction of the lead screw 94 can be opened at the top of the lens barrel corresponding to the focusing lens assembly 6, and the bottom of the lead screw nut 95 can be fixedly connected to the top of the focusing lens assembly 6 through the opening. Then, when the motor 93 rotates, since the lead screw 94 is driven to the output shaft of the motor 93, the rotation of the motor 93 can drive the lead screw 94 to rotate, and the lead screw nut 95, which cooperates with it, can move linearly along the axial direction of the lead screw 94 due to the interaction. Since the focusing lens assembly 6 is fixedly connected to the lead screw nut 95, the focusing lens assembly 6 can be driven to move along the axial direction of the lead screw 94, that is, the axial direction of the lens barrel 4, thereby moving closer to or away from the fixed focal length lens assembly 5 to complete focusing.

[0076] It should be emphasized that when the focusing lens group 6 moves, the distance between the first focusing module 61 and the second focusing module 62 in this embodiment does not change, only the distance between the first focusing module 61 and the fixed-focus lens group 5 changes, that is, the first focusing module 61 and the second focusing module 62 move together.

[0077] It should also be emphasized that other structures can be used in this embodiment to make the focusing lens group 6 close to or far from the fixed-focus lens group 5, and this embodiment does not limit this.

[0078] In actual installation, the glued fixed-focus lens group 5, the first focusing module 61 and the second focusing module 62 can be installed inside the lens barrel 4 to ensure that the focusing lens group 6 can slide smoothly inside the lens barrel 4. Then, the protective glass 8 is installed and fixed on the end of the lens barrel 4 near the camera host. The lens barrel 4 is then assembled with the drive module 9. At this time, the motor 93 in the drive module 9 can drive the focusing lens group 6 to move to change the position of the focusing lens group 6. Finally, the entire assembly is installed inside the housing 1 and connected to the camera 10.

[0079] In this embodiment, the autofocus lens mount may be equipped with a drive module 9 that drives the focusing lens group 6 to move closer to or further away from the fixed-focus lens group 5. A drive circuit 91 connects the motor 93 to the camera host. The drive circuit 91 converts the focusing signal sent by the camera host into a drive signal and transmits it to the motor, thereby enabling the motor 93 to control the focusing lens group 6 to move closer to or further away from the fixed-focus lens group 5 to complete focusing. Compared to existing methods that require manual adjustment of the focusing lens mount by the user, this embodiment allows focusing via the motor 93, improving the user experience.

[0080] Furthermore, since this embodiment uses a motor 93 for driving, the accuracy of focus adjustment is higher compared to the existing manual adjustment method.

[0081] Reference Figure 3 , Figure 3 This is a structural block diagram of the drive circuit 91 in the second embodiment of the autofocus lens mount proposed in this utility model.

[0082] Based on the above embodiments, a second embodiment of this utility model is proposed. For example... Figure 3 As shown, in this embodiment, the driving circuit 91 includes: a first driving board interface CON1, a motor driving chip U1, and a motor interface CON2;

[0083] The first driver board interface CON1 is connected to the camera host and the motor driver chip U1. The first driver board interface CON1 is used to transmit the focus signal sent by the camera host to the motor driver chip U1.

[0084] The motor driver chip U1 is connected to the motor 93 through the motor interface CON2. The motor driver chip U1 is used to convert the focus signal into a drive signal and transmit it to the motor 93 through the motor interface CON2 for driving.

[0085] It should be noted that the driving circuit 91 in this embodiment can be mounted on a driving board, which can be in the form of a circuit board, and is disposed within the aforementioned driving module 9. The aforementioned first driving board interface CON1 can be electrically connected to the camera host, specifically to the image signal processing unit in the camera host. In this embodiment, the image signal processing unit can be any unit that processes and displays the light signal collected by the camera 10, and the image processing unit can also generate a focus signal based on the current image. Furthermore, a motherboard interface can be provided on the camera host, through which the image signal processing unit can be connected to the first driving board interface CON1.

[0086] It is understood that the aforementioned first drive board interface CON1 can be an interface for transmitting focus signals, and the aforementioned motor interface CON2 can be an interface adapted to the aforementioned motor 93 to transmit drive signals.

[0087] In a specific implementation, the image signal processing unit in the camera host can transmit the generated focus signal to the motor drive chip U1 through the first drive board interface CON1. ​​The motor drive chip U1 can convert the focus signal into a drive signal and transmit it to the motor 93 through the motor interface CON2 for driving.

[0088] Furthermore, in order to supply power to the motor driver chip U1, continue as follows Figure 3 As shown, in this embodiment, the driving circuit 91 further includes a first power supply module;

[0089] The first power supply module is connected to the first driver board interface CON1 and the motor driver chip U1. The first power supply module is used to transmit the first power received by the first driver board interface CON1 to the motor driver chip U1 for power supply.

[0090] It should be understood that the aforementioned first power supply can be a power supply used to enable the motor drive chip U1 to work normally, such as a 5V power supply, and this embodiment does not limit this. At the same time, in order to improve the stability of the first power supply, in this embodiment, inductors and capacitors can be set in the first power supply module to filter the first power supply, and the filtered first power supply is transmitted to the motor drive chip U1 for power supply.

[0091] In actual use, the first driver board interface CON1 can also receive the first power supply transmitted from the camera host to the first power supply module. The first power supply module filters the first power supply and transmits the filtered first power supply to the motor drive chip U1 for power supply.

[0092] Furthermore, referring to Figure 4 , Figure 4 The circuit diagram of the first drive board interface CON1 in the second embodiment of the autofocus lens mount proposed in this utility model is shown.

[0093] like Figure 4 As shown, in this embodiment, the power supply terminal (i.e., the first pin of the first driver board interface CON1) of the first driver board interface CON1 can be connected to the camera host and the first power supply module, the transmission terminal (i.e., the second pin to the fifth pin of the first driver board interface CON1) of the first driver board interface CON1 is connected to the image signal processing unit and the motor drive chip U1, and the ground terminal (i.e., the seventh pin of the first driver board interface CON1) of the first driver board is grounded.

[0094] It should be noted that the power supply terminal of the aforementioned first driver board interface CON1 can supply the first power provided by the camera host (i.e., Figure 4 The image signal processing unit can transmit the VCC_5V signal to the first power supply module; the transmission end of the first driver board interface CON1 can transmit the focus signal generated by the image signal processing unit (i.e., VCC_5V) to the first power supply module; Figure 4 The data (AIN1 / APHASE, AIN2 / AENBL, BIN1 / BPHASE, and BIN2 / BENBL) are transmitted to the motor driver chip U1.

[0095] It should also be emphasized that, since the motor driver chip U1 used in this embodiment is model DRV8835, which has a mode selection function, the first driver board interface CON1 in this embodiment can also be configured with a mode selection terminal (i.e., the sixth pin of the first driver board interface CON1). Furthermore, the camera host can also transmit the generated mode selection signal (i.e., ...) Figure 4 The mode (MODE) is transmitted to the motor drive chip U1 through the mode selection terminal of the first driver board interface CON1 for mode selection. The specific mode is not limited in this embodiment.

[0096] Furthermore, referring to Figure 5 , Figure 5 The circuit diagram of the motor drive chip U1 and the first power supply module in the second embodiment of the autofocus lens mount proposed in this utility model is shown.

[0097] like Figure 5As shown, in this embodiment, the first power supply module includes: a first inductor L1, a second inductor L2, and first capacitors C1 to third capacitors C3;

[0098] The first terminal of the first capacitor C1 is connected to the first driver board interface CON1, the first terminal of the first inductor L1, and the first terminal of the second inductor L2, respectively. The second terminal of the first capacitor C1 is grounded. The second terminal of the first inductor L1 is connected to the second terminal of the second capacitor C2 and the first power supply terminal of the motor driver chip U1, respectively. The second terminal of the second capacitor C2 is grounded. The second terminal of the second inductor L2 is connected to the first terminal of the third capacitor C3 and the second power supply terminal of the motor driver chip U1, respectively. The second terminal of the third capacitor C3 is grounded.

[0099] It is understood that the motor driver chip U1 used in this embodiment is model DRV8835. Furthermore, in this embodiment, the first power supply terminal of the motor driver chip U1 can be pin 12 of the motor driver chip U1, and the second power supply terminal of the motor driver chip U1 can be pin 1 of the motor driver chip U1.

[0100] It should be understood that the first terminal of the aforementioned first capacitor C1 can be connected to the power supply terminal of the first driver board interface CON1. ​​In actual use, the power supply terminal of the first driver board interface CON1 will connect to the first power supply (i.e., Figure 5 The first power supply module transmits VCC_5V to the first power supply module. After filtering by the first inductor L1, the second inductor L2, and the first capacitors C1 to C3, the first power supply module obtains two filtered first power supplies. The first filtered first power supply (i.e., VCC_5V) is then used to filter the first power supply. Figure 5 The DRV (Dual Voltage Transmission) is transmitted to the first power supply terminal of the motor driver chip U1, and the second filtered first power supply (i.e., Figure 5 The data is transmitted from the VM to the second power supply terminal of the motor drive chip U1.

[0101] Furthermore, continue as Figure 5 As shown, in this embodiment, the receiving end of the motor driver chip U1 (i.e., pins 7 to 10 of the motor driver chip U1) is connected to the transmitting end of the first driver board interface CON1. ​​Specifically, pin 10 of the motor driver chip U1 can be connected to pin 2 of the first driver board interface CON1, pin 9 of the motor driver chip U1 can be connected to pin 3 of the first driver board interface CON1, pin 8 of the motor driver chip U1 can be connected to pin 4 of the first driver board interface CON1, and pin 7 of the motor driver chip U1 can be connected to pin 5 of the first driver board interface CON1.

[0102] Furthermore, the transmission end of the first driver board interface CON1 can transmit the focus signal (i.e. Figure 5 The signals (AIN1 / APHASE, AIN2 / AENBL, BIN1 / BPHASE, and BIN2 / BENBL) are transmitted to the receiving end of the motor drive chip U1.

[0103] Meanwhile, the mode selection terminal of the motor driver chip U1 (i.e., pin eleven of the motor driver chip U1) can be connected to the mode selection terminal of the first driver board interface CON1 to receive the aforementioned mode selection signal (i.e., Figure 5 Select the mode using MODE).

[0104] It should also be noted that the first ground terminal of the motor driver chip U1 (i.e., the thirteenth pin of the motor driver chip U1) is connected to the second ground terminal of the motor driver chip U1 (i.e., the sixth pin of the motor driver chip U1), and the first ground terminal of the motor driver chip U1 is also grounded.

[0105] It is also understandable that the output terminals of motor driver chip U1 (i.e., pins 2 to 5 of motor driver chip U1) are connected to motor interface CON2. In actual use, after receiving the focus signal, motor driver chip U1 can generate a drive signal (i.e., ... Figure 5 AOUT1, AOUT2, BOUT1, and BOUT2 are transmitted to the motor interface CON2 through the output of the motor driver chip U1, and then to the motor 93 through the motor interface CON2 for driving.

[0106] Furthermore, referring to Figure 6 , Figure 6 This is a circuit diagram of the motor interface CON2 in the second embodiment of the autofocus lens mount proposed in this utility model.

[0107] like Figure 6 As shown, in this embodiment, the transmission terminals of motor interface CON2 (i.e., the first pin to the fourth pin of motor interface CON2) are all connected to the output terminal of motor driver chip U1 and motor 93. Specifically, the first pin of motor interface CON2 can be connected to the second pin of motor driver chip U1 and motor 93, the second pin of motor interface CON2 can be connected to the third pin of motor driver chip U1 and motor 93, the third pin of motor interface CON2 can be connected to the fourth pin of motor driver chip U1 and motor 93, and the fourth cathode of motor interface CON2 can be connected to the fifth pin of motor driver chip U1 and motor 93.

[0108] In practical use, the transmission end of the motor interface CON2 can transmit the drive signal (i.e., Figure 6The signals from AOUT1, AOUT2, BOUT1, and BOUT2 are transmitted to motor 93 for driving.

[0109] Reference Figure 7 , Figure 7 This is a structural block diagram of the feedback circuit 92 in the third embodiment of the autofocus lens mount proposed in this utility model.

[0110] Based on the above embodiments, a third embodiment of this utility model is proposed. For example... Figure 7 As shown, in this embodiment, in order to detect whether the motor 93 has rotated to the corresponding position, the autofocus lens mount further includes: an encoder and a feedback circuit 92;

[0111] The encoder is connected to the feedback circuit 92. The encoder is used to collect the rotation position of the motor 93 and transmit the generated feedback signal to the feedback circuit 92.

[0112] The feedback circuit 92 is connected to the camera host and is used to transmit the feedback signal to the camera host so that the camera host generates an adjustment signal based on the feedback signal and transmits it to the drive circuit 91.

[0113] The drive circuit 91 is also used to convert the adjustment signal into the drive signal and transmit it to the motor 93 for driving.

[0114] It should be noted that the encoder in this embodiment can be set at a location where the rotational position of the motor 93 can be acquired, such as at the drive shaft of the motor 93. The specific location can be set according to the actual situation, and this embodiment does not impose any limitations on this. The aforementioned rotational position can be the position of the drive shaft of the motor 93. Furthermore, the feedback circuit 92 in this embodiment can also be set on the aforementioned drive board.

[0115] It should also be noted that the feedback circuit 92 in this embodiment can be connected to the image signal processing unit in the camera host, and the feedback circuit 92 can also be connected to the first drive board interface CON1. ​​In actual use, the encoder can collect the rotation position of the motor 93 in real time and transmit the generated feedback signal to the image signal processing unit through the feedback circuit 92. The image signal processing unit can determine whether the motor 93 has rotated to the corresponding position, i.e., whether it has rotated to the position corresponding to the focus signal when focusing, based on the feedback signal. If so, it means that the motor 93 has rotated to the correct position and no adjustment is needed; if not, it can generate a corresponding adjustment signal based on the feedback signal and transmit the adjustment signal to the motor drive chip U1 through the first drive board interface CON1, so that the motor drive chip U1 generates a corresponding drive signal based on the adjustment signal and transmits it to the motor 93 for driving. This completes closed-loop control, ensures that the motor 93 rotates to the correct position, and improves the accuracy of focusing.

[0116] Furthermore, continue as Figure 7 As shown, in this embodiment, the feedback circuit 92 includes: encoder interface CON4 and second driver board interface CON3;

[0117] The encoder interface CON4 is connected to the encoder and the second driver board interface CON3. The encoder interface CON4 is used to receive the feedback signal sent by the encoder and transmit the feedback signal to the second driver board interface CON3.

[0118] The second driver board interface CON3 is connected to the camera host, and the second driver board interface CON3 is used to transmit the feedback signal to the camera host.

[0119] Understandably, the encoder interface CON4 mentioned above can be an interface used to transmit feedback signals generated by the encoder. The second driver board interface CON3 mentioned above can be an interface used to transmit feedback signals. The second driver board interface CON3 mentioned above can be connected to the image signal processing unit in the camera host, that is, the image signal processing unit can also be connected to the second driver board interface CON2 through the motherboard interface mentioned above.

[0120] In actual use, the feedback signal generated by the encoder can be transmitted to the first driver board interface CON1 through the encoder interface CON4, and then transmitted to the image signal processing unit of the camera host through the first driver board interface CON1, so that the image signal processing unit can generate an adjustment signal based on the feedback signal.

[0121] Furthermore, in order to power the encoder, continue as follows Figure 7 As shown, in this embodiment, the feedback circuit 92 further includes: a second power supply module;

[0122] The second power supply module is connected to the second drive board interface CON3 and the second drive board interface CON3. The second power supply module is used to transmit the second power received by the second drive board interface CON3 to the encoder for power supply.

[0123] It should be understood that the aforementioned second power supply can be a power supply used to enable the encoder to work normally, such as 3.3V, etc., and this embodiment does not limit it. At the same time, in order to improve the stability of the second power supply, in this embodiment, inductors and capacitors can be set in the second power supply module to filter the second power supply, and the filtered second power supply is transmitted to the encoder through the encoder interface CON4 to power the encoder.

[0124] In actual use, the second driver board interface CON3 can transmit the second power supply provided by the image signal processing unit to the second power supply module. The second power supply module filters the second power supply and transmits the filtered second power supply to the encoder through the encoder interface CON4 for power supply.

[0125] Furthermore, referring to Figure 8 , Figure 8 The circuit diagram of the second drive interface and encoder interface CON4 in the third embodiment of the autofocus lens mount proposed in this utility model is shown.

[0126] like Figure 8 As shown, in this embodiment, the power supply terminal (i.e., the first pin of the encoder interface CON4) of the encoder interface CON4 is connected to the encoder and the second power supply module, the transmission terminal (i.e., the second pin and the third pin of the encoder interface CON4) of the encoder interface CON4 is connected to the encoder and the second driver board interface CON3, and the ground terminal (i.e., the fourth pin of the encoder) of the encoder interface CON4 is grounded.

[0127] It should be noted that the power supply terminal of the encoder interface CON4 can receive a second power supply after filtering by the second power supply module (i.e., Figure 8 The second power supply (VCC_COD) is filtered and transmitted to the encoder for power supply; the transmission end of the encoder interface CON4 can receive the feedback signal output by the encoder (i.e., VCC_COD). Figure 8 The SDA and SCL are transmitted to the second driver board interface CON3.

[0128] Furthermore, continue as Figure 8 As shown, the power supply terminal (i.e., the first pin of the second driver board interface CON3) of the second driver board interface CON3 can be connected to the camera host and the second power supply module. The transmission terminal (i.e., the second pin and the third pin of the second driver board) of the second driver board interface CON3 is connected to the image signal processing unit and the encoder interface CON4. The ground terminal (i.e., the fourth pin of the second driver board interface CON3) of the second driver board interface CON3 is grounded.

[0129] It should be noted that the power supply terminal of the aforementioned second driver board interface CON3 can supply the second power source (i.e., the camera host) Figure 8 The signal (VCC_3V3) is transmitted to the second power supply module; the transmission end of the second driver board interface CON3 can receive the feedback signal transmitted by the encoder interface CON4 (i.e., Figure 8The SDA and SCL signals are transmitted to the image signal processing unit. Specifically, in this embodiment, the second pin of the second driver board interface CON3 can be connected to the second pin of the encoder interface CON4, and the third pin of the second driver board can be connected to the third pin of the encoder interface CON4.

[0130] Furthermore, in order to power the encoder, refer to Figure 9 , Figure 9 This is a circuit diagram of the second power supply module in the third embodiment of the autofocus lens mount proposed in this utility model. Figure 9 As shown, in this embodiment, the second power supply module includes: a fourth capacitor C4 and a third inductor L3;

[0131] The first end of the fourth capacitor C4 is connected to the second driver board interface CON3 and the first end of the third inductor L3, respectively. The second end of the fourth capacitor C4 is grounded, and the second end of the third inductor L3 is connected to the power supply terminal of the second driver board interface CON3.

[0132] It should be noted that, in this embodiment, the first end of the fourth capacitor C4 can be connected to the power supply terminal of the second driver board interface CON3, and the second end of the third inductor L3 can be connected to the power supply terminal of the encoder interface CON4.

[0133] In practical use, the camera host can be powered by a second power source (i.e., Figure 9 The power supply (VCC_3V3) is transmitted to the second power supply module through the power terminal of the second driver board interface CON3. The second power supply module filters the second power supply through the fourth capacitor C4 and the third inductor L3, and then transmits the filtered second power supply (i.e., VCC_3V3) to the second power supply module. Figure 9 The VCC_COD signal is transmitted to the encoder via the encoder's power supply terminal for power supply.

[0134] Furthermore, in order to improve the quality of the feedback signal, in this embodiment, the feedback circuit 92 further includes a pull-up module;

[0135] The pull-up module is connected to the encoder interface CON4 and the second driver board interface CON3. The pull-up module is used to pull up the feedback signal and transmit the pulled-up feedback signal to the camera host through the second driver board interface CON3.

[0136] It should be noted that the aforementioned pull-up module can be a module that pulls the feedback signal to a high level. In this embodiment, the power supply for the pull-up module can be provided by a second power supply module, which can then transmit filtered second power to the pull-up module, so that the pull-up module pulls up the feedback signal through the filtered second power.

[0137] Furthermore, referring to Figure 10 , Figure 10 This is a circuit diagram of the pull-up module in the third embodiment of the autofocus lens mount proposed in this utility model.

[0138] like Figure 10 As shown, in this embodiment, the pull-up module includes: a first resistor R1 and a second resistor R2;

[0139] The first end of the first resistor R1 is connected to the second power supply module and the first end of the second resistor R2 respectively. The second end of the first resistor R1 is connected to the encoder interface CON4. The second end of the second resistor R2 is connected to the encoder interface CON4.

[0140] It should be noted that in this embodiment, the first end of the first resistor R1 can be connected to the second end of the third inductor L3 in the second power supply module, the second end of the first resistor R1 can be connected to the third pin of the encoder interface CON4, and the second end of the second resistor R2 can be connected to the second pin of the encoder interface CON4.

[0141] Therefore, in actual use, after the encoder interface CON4 outputs a feedback signal, it can be transmitted through a filtered second power supply (i.e., Figure 10 VCC_COD) on the feedback signal (i.e. Figure 10 The SDA and SCL are pulled up, and the feedback signal after the pull-up is transmitted to the transmission end of the second driver board interface CON3. Then, it is transmitted to the image signal processing unit through the second driver board interface CON3, so that the image signal processing unit can generate an adjustment signal based on the feedback signal after the pull-up.

[0142] In addition, to achieve the above objectives, this embodiment also provides an endoscope device, which includes: an endoscope, a camera 10, a camera host, and an autofocus lens mount as described above;

[0143] The endoscope is detachably connected to the camera 10 via the autofocus lens mount.

[0144] The camera 10 is connected to the camera host via a cable.

[0145] The specific structures of the endoscope, camera host, camera 10, and autofocus lens mount can all refer to the above embodiments. Since this endoscope device adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought about by the technical solutions of the above embodiments, and will not be described in detail here.

[0146] The above are merely preferred embodiments of this utility model and do not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made based on the description and drawings of this utility model, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. An auto focus lens mount, characterized by, The autofocus lens mount includes: The lens barrel has a fixed-focus lens group and a focusing lens group spaced apart along the axial direction inside the lens barrel. The drive module includes a motor and a drive circuit. The motor drives the focusing lens group to move along the axial direction of the lens barrel so that the focusing lens group moves closer to or away from the fixed-focus lens group. The drive circuit is connected to both the camera host and the motor. The drive circuit receives the focusing signal sent by the camera host and converts the focusing signal into a drive signal, which is then transmitted to the motor for driving.

2. The auto focus lens mount of claim 1, wherein, The motor is located on the outside of the lens barrel. The drive module also includes a lead screw and a lead screw nut. The lead screw is connected to the output shaft of the motor, and the lead screw nut is sleeved on the lead screw and connected to the focusing lens group.

3. The auto focus lens mount of claim 1, wherein, The drive circuit includes: a first drive board interface, a motor drive chip, and a motor interface; The first driver board interface is connected to the camera host and the motor driver chip. The first driver board interface is used to transmit the focus signal sent by the camera host to the motor driver chip. The motor driver chip is connected to the motor through the motor interface. The motor driver chip is used to convert the focus signal into a drive signal and transmit it to the motor through the motor interface for driving.

4. The auto focus lens mount of claim 3, wherein, The driving circuit further includes: a first power supply module; The first power supply module is connected to the first driver board interface and the motor driver chip. The first power supply module is used to transmit the first power received by the first driver board interface to the motor driver chip for power supply.

5. The auto focus lens mount of claim 4, wherein, The first power supply module includes: a first inductor, a second inductor, and a first capacitor to a third capacitor; The first terminal of the first capacitor is connected to the first driver board interface, the first terminal of the first inductor, and the first terminal of the second inductor, respectively. The second terminal of the first capacitor is grounded. The second terminal of the first inductor is connected to the second terminal of the second capacitor and the first power supply terminal of the motor driver chip, respectively. The second terminal of the second capacitor is grounded. The second terminal of the second inductor is connected to the first terminal of the third capacitor and the second power supply terminal of the motor driver chip, respectively. The second terminal of the third capacitor is grounded.

6. The auto focus lens mount of claim 1, wherein, The autofocus lens mount also includes: an encoder and a feedback circuit; The encoder is connected to the feedback circuit. The encoder is used to acquire the rotational position of the motor and transmit the generated feedback signal to the feedback circuit. The feedback circuit is connected to the camera host and is used to transmit the feedback signal to the camera host so that the camera host generates an adjustment signal based on the feedback signal and transmits it to the drive circuit. The drive circuit is also used to convert the adjustment signal into the drive signal and transmit it to the motor for driving.

7. The auto focus lens mount of claim 6, wherein, The feedback circuit includes: an encoder interface and a second driver board interface; The encoder interface is connected to the encoder and the second driver board interface. The encoder interface is used to receive the feedback signal sent by the encoder and transmit the feedback signal to the second driver board interface. The second driver board interface is connected to the camera host, and the second driver board interface is used to transmit the feedback signal to the camera host.

8. The auto focus lens mount of claim 7, wherein, The feedback circuit also includes: a second power supply module; The second power supply module is connected to the second drive board interface and the second drive board interface. The second power supply module is used to transmit the second power received by the second drive board interface to the encoder for power supply.

9. The auto focus lens mount of claim 8, wherein, The second power supply module includes: a fourth capacitor and a third inductor; The first end of the fourth capacitor is connected to the second driver board interface and the first end of the third inductor, respectively. The second end of the fourth capacitor is grounded, and the second end of the third inductor is connected to the power supply terminal of the second driver board interface.

10. An endoscope apparatus characterized by comprising: The endoscopic device includes: an endoscope, a camera, a camera host, and an autofocus lens mount as described in any one of claims 1 to 9; The endoscope is detachably connected to the camera via the autofocus lens mount. The camera is connected to the camera host via a cable.

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