CN214906697U

CN214906697U - Electric vaginal dilator

Info

Publication number: CN214906697U
Application number: CN202120180861.8U
Authority: CN
Inventors: 张锦平; 李石磊; 姚进
Original assignee: Sichuan University
Current assignee: Sichuan University
Priority date: 2021-01-22
Filing date: 2021-01-22
Publication date: 2021-11-30
Anticipated expiration: 2031-01-22

Abstract

The utility model relates to the technical field of medical appliances, in particular to an electric vaginal dilator which is convenient to connect and disassemble, has small volume and can adapt to the vaginal shape to be propped open; comprises an upper expanding sheet (1), a lower expanding sheet (2), a multi-rod transmission mechanism, a power source and a control device; wherein the upper expansion piece (1) and the lower expansion piece (2) enter the vagina and are contacted with the skin, the power source and the control device are used for providing power, assisting a doctor to hold and switch, automatically controlling and the like, and the multi-rod transmission mechanism is used for converting the power into the direction to act on the upper expansion piece (1) and the lower expansion piece (2); has the advantages of convenient connection and disassembly, small volume, capability of adapting to the vaginal shape to be propped open, safety and the like.

Description

Electric vaginal dilator

Technical Field

The utility model relates to the technical field of medical equipment, in particular to an electric vaginal dilator which is convenient to connect and disassemble, has small volume and can adapt to the vaginal shape to be propped open.

Background

In examination and operation of gynecological diseases, the vaginal dilator is used to open the vagina, open the visual field, manipulate and treat the passage. The common vaginal dilator consists of a duckbill-shaped upper dilating tablet, a duckbill-shaped lower dilating tablet, a handle, an adjusting mechanism and the like, wherein the relative motion of the upper dilating tablet and the lower dilating tablet comprises relative rotation and relative movement.

ZL201520377271.9 discloses an electronic fine setting expands external genitals, and the device includes duckbilled epitheca, duckbilled inferior valve, handheld fine setting ware, utilizes motor, drive gear etc. to realize expanding the automatic of external genitals and struts. The disadvantages of this device are: the handheld fine adjuster is connected with the duckbill upper shell and the duckbill lower shell, and during operation or observation, the handheld fine adjuster may influence an observation space or an operation space.

ZL202010312111.1 discloses a disposable touch-free induction type vaginal dilator device, which comprises an upper dilator sheet and a lower dilator sheet, wherein the upper dilator sheet and the lower dilator sheet are driven to rotate relatively by an electric motor and an elastic contraction band. The disadvantages of this device are: the upper expansion sheet and the lower expansion sheet only rotate relatively, the shapes of the upper expansion sheet and the lower expansion sheet are possibly not suitable for the expansion characteristic of the vagina, so that the vagina is not completely expanded, and the driving device is left on the upper expansion sheet and the lower expansion sheet, so that the observation space or the operation space can be influenced.

SUMMERY OF THE UTILITY MODEL

The utility model discloses stay on expanding the external genitals to electronic expanding external genitals electrical equipment and obstruct observation, operation problem and electronic expanding external genitals and expand the piece motion ability under and not enough lead to the vagina to expand insufficient problem down, provide a convenient electronic external genitals that expands that dismantles, small, can adapt to the vagina shape and strut.

The utility model provides an electric vaginal dilator which comprises an upper dilating blade (1), a lower dilating blade (2), a multi-rod transmission mechanism, a power source and a control device; wherein the upper expansion piece (1) and the lower expansion piece (2) enter the vagina to be contacted with the skin, the power source and the control device are used for providing power, assisting a doctor to hold and switch, automatically controlling and the like, and the multi-rod transmission mechanism is used for converting the power into the direction to act on the upper expansion piece (1) and the lower expansion piece (2).

The multi-lever transmission mechanism includes: a lower expansion piece connecting rod (3), a screw rod 1 (4), a nut 1 (5), a slide block (6), an upper expansion piece connecting rod (7), a screw rod 2 (9) and a nut 2 (10). The power source and control device includes: the bevel gear steering gear comprises a bevel gear steering gear 1 (8), a bevel gear steering gear 2 (11), a clamping groove (12), a spring (13), a base (15), a bevel gear 1 (16), a bevel gear 2 (17), a sensor 1 (18), a sensor 2 (19), a button (20), a motor 1 (21), a motor 2 (22), a control chip (23), a battery (24), a power source and control box (25), an unlocking device (14) or an electromagnet (26) and a handle (27).

Go up and expand piece (1) and last expand between piece connecting rod (7) can be through quick, firm connection of groove and boss, expand under and also can be through quick, firm connection of groove and boss between piece (2) and the expansion piece connecting rod (3) down.

The multi-rod transmission mechanism and the power source and control device can realize connection and power transmission by inserting the boss of the lower expansion piece connecting rod (3) into the groove of the clamping groove (12), inserting the boss of the screw rod 1 (4) into the groove of the bevel gear steering gear 1 (8) and inserting the boss of the screw rod 2 (9) into the groove of the bevel gear steering gear 2 (11), and rotating the unlocking device (14) anticlockwise to enable the clamping groove (12) to move downwards, so that the multi-rod transmission mechanism and the power source and control device can be conveniently installed and detached, after the vagina is expanded, only the upper expansion piece (1), the lower expansion piece (2) and the multi-rod transmission mechanism are left on a patient body, and the observation and operation space can be enlarged; and the multi-rod transmission mechanism adopts a screw nut, and can be self-locked after the power source and the control device are taken away.

In the multi-rod transmission mechanism, a screw rod 1 (4) and a screw rod 2 (9) are driving members, the power of the screw rod 1 (4) is transmitted by a motor 1 (21) through a sensor 1 (18), a bevel gear 1 (16) and a bevel gear steering device 1 (8), and the power of the screw rod 2 (9) is transmitted by the motor 2 (22) through a sensor 2 (19), a bevel gear 2 (17) and a bevel gear steering device 2 (11).

The screw rod 1 (4) and the nut 1 (5) form a screw pair, and when the screw rod 1 (4) rotates, the nut 1 (5) moves up and down; the screw rod 2 (9) and the nut 2 (10) form a screw pair, and when the screw rod 2 (9) rotates, the nut 2 (10) moves up and down; the upper expansion piece connecting rod (7) and the sliding block (6) form a moving pair, the sliding block (6) is hinged with the nut 1 (5), and the upper expansion piece connecting rod (7) is hinged with the nut 2 (10), so that when the screw rod 1 (4) and the screw rod 2 (9) rotate, the upper expansion piece connecting rod (7) can ascend, descend and rotate relative to the lower expansion piece connecting rod (3) to better adapt to the expansion characteristics of the vagina of different patients.

The control chip (23) receives signals from the sensors 1 (18) and 2 (19), can control the motors 1 (21) and 2 (22) to rotate, and can analyze the rotation resistance of the screw rods 1 (4) and 2 (9) according to the signals, so as to analyze the difficulty of expanding the inner side and the outer side of the vagina and the limit of expanding the inner side and the outer side of the vagina, so that the vaginal dilator can sufficiently expand the outer side and the inner side of the vagina, and the force applied to the tissues can be kept in a safe range, and meanwhile, the judgment of experience of doctors can be replaced, and the vagina can be expanded more accurately and conveniently.

The utility model has the advantages that: 1) the electric dilator for the vagina can realize electric distraction, the upper dilating sheet (1) and the lower dilating sheet (2) have the capabilities of adjusting the distance and the angle, the vagina can be fully dilated, and the vagina dilating effect is ensured while the labor intensity of doctors is reduced. 2) The distance and the angle between the upper expansion sheet (1) and the lower expansion sheet (2) of the vaginal dilator can be adjusted according to data such as torque measured by a sensor, so that the vaginal dilator adapts to the situation of the vagina of different patients, the pain of the patients can be relieved while the vagina is fully expanded, and the vaginal dilator is safer. 3) Whether the vagina of the patient is fully expanded or not can be automatically checked according to data such as torque measured by the sensor, the expansion process of the vaginal dilator does not need to be controlled by a doctor in person, only the pneumatic vaginal dilator is needed, and the like, so that the automation degree is higher. 4) The power source and the control device can be conveniently connected with the multi-rod transmission mechanism to realize power transmission, after the vagina is expanded, the unlocking device (14) is rotated anticlockwise to enable the clamping groove (12) to move downwards, so that the power source and the control device are rapidly separated, the multi-rod transmission mechanism can be kept in an open state by means of self-locking of the screw rod nut, the device is smaller, and more spaces are reserved for observation and operation.

Drawings

Fig. 1 is an overall configuration diagram of the electric vaginal speculum.

Fig. 2 is a connection diagram of the multi-lever transmission mechanism and the power source and control device.

Fig. 3 is a schematic diagram of a multi-rod mechanism of the four-rod vaginal dilator.

Fig. 4 is a force-bearing schematic diagram of the multi-rod mechanism.

Fig. 5 is a schematic view of the large opening of the vaginal dilator.

Fig. 6 is a schematic view of the small opening of the vaginal dilator.

FIG. 7 is a structural view of embodiment 2.

Description of the main symbols: 1. the bevel gear steering gear comprises an upper expansion sheet, a lower expansion sheet connecting rod, a lead screw 1, a nut 5, a sliding block 6, an upper expansion sheet connecting rod 7, a bevel gear steering gear 1, a bevel gear steering gear 9, a lead screw 2, a lead screw 10, a nut 2, a bevel gear steering gear 11, a bevel gear steering gear 2, a bevel gear 12, a clamping groove 13, a spring 14, an unlocking device 15, a base, a bevel gear 1, a bevel gear 17, a bevel gear 2, a bevel gear 18, a sensor 1, a sensor 19, a sensor 2, a button 20, a motor 1, a motor 22, a motor 2, a motor 23, a control chip 24, a battery, a power source and control box 25, an electromagnet 26, a handle 27 and a handle.

Detailed Description

The following describes in detail embodiments of the present invention with reference to the accompanying drawings.

Fig. 1 is an embodiment of the present invention, and an electric vaginal dilator comprises an upper dilator blade (1), a lower dilator blade (2), a multi-rod transmission mechanism, a power source and a control device; wherein the upper expansion piece (1) and the lower expansion piece (2) enter the vagina to be contacted with the skin, the power source and the control device are used for providing power, assisting a doctor to hold and switch, automatically controlling and the like, and the multi-rod transmission mechanism is used for converting the power into the direction to act on the upper expansion piece (1) and the lower expansion piece (2).

One end of each of the upper expansion piece (1) and the lower expansion piece (2) is provided with a groove with an opening towards the center line, the specific form is that the opening of the groove of the upper expansion piece (1) is downward, the opening of the groove of the lower expansion piece (2) is upward, and the upper expansion piece (1) and the lower expansion piece (2) are disposable.

The multi-lever transmission mechanism includes: a lower expansion piece connecting rod (3), a screw rod 1 (4), a nut 1 (5), a slide block (6), an upper expansion piece connecting rod (7), a screw rod 2 (9) and a nut 2 (10). The lower expansion piece connecting rod (3) forms a revolute pair with the screw rod 1 (4) and the screw rod 2 (9) respectively, and the screw rod 1 (4) and the screw rod 2 (9) can rotate around the central line of the screw rod; the lower expansion piece connecting rod (3) is provided with three bosses, one of which can be inserted into the groove of the lower expansion piece (2), and the other two bosses can be inserted into the two grooves of the clamping groove (12). The screw rod 1 (4) and the nut 1 (5) form a screw pair, the upper end of the screw rod 1 (4) is provided with a boss which can be inserted into a groove of the bevel gear steering gear 1 (8), so that the power transmission from the bevel gear steering gear 1 (8) to the screw rod 1 (4) is realized. The sliding block (6) and the upper expansion piece connecting rod (7) form a moving pair, the sliding block (6) can move on the upper expansion piece connecting rod (7), and the sliding block (6) is hinged with the nut 1 (5). The screw rod 2 (9) and the nut 2 (10) form a screw pair, the upper end of the screw rod 2 (9) is provided with a boss which can be inserted into a groove of the bevel gear steering gear 2 (11), so that the power transmission from the bevel gear steering gear 2 (11) to the screw rod 2 (9) is realized. The upper expansion piece connecting rod (7) is hinged with the nut 2 (10), the upper expansion piece connecting rod (7) is provided with a boss, and the boss can be inserted into the groove of the upper expansion piece (1).

The power source and control device includes: the bevel gear steering gear comprises a bevel gear steering gear 1 (8), a bevel gear steering gear 2 (11), a clamping groove (12), a spring (13), an unlocking device (14), a base (15), a bevel gear 1 (16), a bevel gear 2 (17), a sensor 1 (18), a sensor 2 (19), a button (20), a motor 1 (21), a motor 2 (22), a control chip (23), a battery (24), a power source and a control box (25). The bevel gear redirector 1 (8) is provided with a bevel gear and a groove, the bevel gear redirector 1 (8) and the base (15) form a rotating pair, the bevel gear redirector 1 (8) can rotate around the central line of the bevel gear, and the bevel gear redirector 1 (8) is meshed with the bevel gear 1 (16). The bevel gear redirector 2 (11) is provided with a bevel gear and a groove, the bevel gear redirector 2 (11) and the base (15) form a rotating pair, the bevel gear redirector 2 (11) can rotate around the central line of the bevel gear, and the bevel gear redirector 2 (11) is meshed with the bevel gear 2 (17). The base (15) and the bevel gears 1 (16) and 2 (17) respectively form a revolute pair, the base (15) is fixedly connected with the power source and the control box (25), the base (15) is hinged with the unlocking device (14), the base (15) and the clamping groove (12) form a moving pair, and the clamping groove (12) can slide up and down. The clamping groove (12) is provided with two grooves, and a spring (13) is arranged between the clamping groove (12) and the base (15) to enable the clamping groove (12) to move upwards. The unlocking device (14) can be in contact with the upper end of the clamping groove (12), and the unlocking device (14) is rotated anticlockwise to push the clamping groove (12) to move downwards. The motor 1 (21) is fixed in the power source and control box (25), the output shaft of the motor 1 (21) is connected with the sensor 1 (18), the sensor 1 (18) is fixed in the power source and control box (25), and the other end of the sensor 1 (18) is connected with the bevel gear 1 (16). The motor 2 (22) is fixed in the power source and control box (25), the output shaft of the motor 2 (22) is connected with the sensor 2 (19), the sensor 2 (19) is fixed in the power source and control box (25), and the other end of the sensor 2 (19) is connected with the bevel gear 2 (17). The button (20) is arranged on the power source and control box (25). The control chip (23) and the battery (24) are respectively fixed in the power source and the control box (25), the control chip (23) receives signals from the sensors 1 (18) and 2 (19) and can control the motors 1 (21) and 2 (22), and the battery (24) provides electric energy for the device.

The upper expanding sheet (1), the lower expanding sheet (2), the multi-rod transmission mechanism, the power source and the control device can be quickly and firmly connected. Go up and expand piece (1) and last expand between piece connecting rod (7) can be through quick, firm connection of groove and boss, expand under and also can be through quick, firm connection of groove and boss between piece (2) and the expansion piece connecting rod (3) down. As shown in fig. 2, the multi-rod transmission mechanism and the power source and control device can realize connection and power transmission by inserting the boss of the lower expansion piece connecting rod (3) into the groove of the clamping groove (12), inserting the boss of the screw rod 1 (4) into the groove of the bevel gear steering gear 1 (8), and inserting the boss of the screw rod 2 (9) into the groove of the bevel gear steering gear 2 (11), and rotating the unlocking device (14) counterclockwise can make the clamping groove (12) move downward, so as to facilitate the installation and disassembly of the multi-rod transmission mechanism and the power source and control device, after the vagina is expanded, only the upper expansion piece (1), the lower expansion piece (2) and the multi-rod transmission mechanism are left on the body of the patient, so that the observation and operation space can be enlarged; and the multi-rod transmission mechanism adopts a screw nut, and can be self-locked after the power source and the control device are taken away.

FIG. 3 is a schematic view of a multi-rod mechanism of a four-rod uterus dilator, wherein a screw rod 1 (4) and a screw rod 2 (9) are driving elements which can rotate; the screw rod 1 (4) and the nut 1 (5) form a screw pair, and when the screw rod 1 (4) rotates, the nut 1 (5) moves up and down; the screw rod 2 (9) and the nut 2 (10) form a screw pair, and when the screw rod 2 (9) rotates, the nut 2 (10) moves up and down; the upper expansion piece connecting rod (7) and the sliding block (6) form a moving pair, the sliding block (6) is hinged with the nut 1 (5), and the upper expansion piece connecting rod (7) is hinged with the nut 2 (10), so that when the screw rod 1 (4) and the screw rod 2 (9) rotate, the upper expansion piece connecting rod (7) can ascend, descend and rotate relative to the lower expansion piece connecting rod (3), and the upper expansion piece (1) and the lower expansion piece (2) are driven to move and rotate relative to each other, so that the vaginal expansion characteristics of different patients can be better adapted.

The stress situation of the multi-rod mechanism can be simplified into the situation shown in fig. 4: the upper expansion sheet (1) is subjected to a downward force F1 from the vagina, which is distributed over most of the area of the upper expansion sheet (1); the lower expansion flap (2) is subjected to an upward force F2 from the vagina, which is distributed over a substantial area of the lower expansion flap (2); the pressure T1 is present on the spindle 1 (4) and the pressure T2 is present on the spindle 2 (9).

The vaginal dilation and the shape of the vaginal dilator are affected by the dilation capacities of the inner side and the outer side of the vagina of different patients, and when the vaginal dilator dilates the vagina, the safety of the patients must be ensured, namely, the vaginal laceration caused by too large vaginal dilation is avoided; as shown in fig. 5, if the distance allowed to expand outside the vagina is small, the included angle between the upper expansion piece (1) and the lower expansion piece (2) is larger, and as shown in fig. 6, if the distance allowed to expand outside the vagina is large, the included angle between the upper expansion piece (1) and the lower expansion piece (2) is smaller. The pressure T1 and T2 on the screw rod 1 (4) and the screw rod 2 (9) can be calculated through parameters such as torque measured by the sensors 1 (18) and 2 (19), the size and the pressure of the screw rod 1 (4) and the screw rod 2 (9) can be used for calculating the resultant force and the position of the vagina on the upper expansion sheet (1) and the lower expansion sheet (2) respectively, if the resultant force is close to the outer side of the vagina, the outer side of the vagina is subjected to a larger force, and if the resultant force is close to the inner side of the vagina, the inner side of the vagina is subjected to a larger force; therefore, the stress conditions of the inner side and the outer side of the vagina can be accurately estimated by combining the magnitude and the position of the resultant force of the vagina to the upper expansion sheet (1) and the lower expansion sheet (2). The control chip (23) receives signals from the sensors 1 (18) and 2 (19), can control the motors 1 (21) and 2 (22) to rotate, and can analyze the rotation resistance of the screw rods 1 (4) and 2 (9) according to the signals, so as to analyze the difficulty of expanding the inner side and the outer side of the vagina and the limit of expanding the inner side and the outer side of the vagina, so that the vaginal dilator can sufficiently expand the outer side and the inner side of the vagina, and the force applied to the tissues can be kept in a safe range, and meanwhile, the judgment of experience of doctors can be replaced, and the vagina can be expanded more accurately and conveniently.

The working process of the device is as follows: 1) the doctor connects the upper expansion sheet (1) and the lower expansion sheet (2) with an upper expansion sheet connecting rod (7) and a lower expansion sheet connecting rod (3) of the multi-rod transmission mechanism respectively through a groove and a boss; 2) a doctor holds the power source and control box (25), rotates the unlocking device (14) anticlockwise, inserts the boss of the lower expansion piece connecting rod (3) into the groove of the clamping groove (12), inserts the boss of the screw rod (1), (4) into the groove of the bevel gear steering gear (1), (8), and inserts the boss of the screw rod (2), (9) into the groove of the bevel gear steering gear (2), (11) to realize connection and power transmission; 3) put into patient's vagina with last expansion piece (1), lower expansion piece (2), start the external genitals that expands through button (20), wait to expand after the end, anticlockwise rotation unlocker (14), take power supply and controlling means away.

Fig. 7 shows a second embodiment of the present invention, in which the pushing manner of the card slot (12), the holding position of the doctor, the mounting positions of the button (20), the control chip (23) and the battery (24) are changed compared with the first embodiment. As shown in fig. 7, an electromagnet (26) is mounted on the base (15), the electromagnet (26) can push the card slot (12) to move downwards, and the action of the electromagnet (26) is controlled by a button (20) instead of the unlocking device (14) in the first embodiment. As shown in fig. 7, the button (20), the control chip (23) and the battery (24) are respectively installed on the handle (27), the handle (27) is hinged with the base (15), and the rest devices except the handle (27), the button (20), the control chip (23) and the battery (24) are balanced with respect to the hinge point by gravity moment.

The operation of the device of the second embodiment is slightly modified with respect to the operation of the device of the first embodiment, including the use of a hand-held handle (27) by the doctor, and the actuation of the card slot (12) by an electromagnet (26).

The present embodiment addresses the problems of: the physician holds the device described in the first embodiment, and under the influence of the gravity of the device and the external holding force of the physician, the interaction forces between the upper and lower dilation pieces (1, 2) and the vagina will contain additional components to balance the gravity of the device and the external holding force of the physician, which will influence the calculation of the dilation inside and outside the vagina.

The working principle of the embodiment is as follows: 1) the reasonable position of a hinge point of the handle (27) and the base (15) is utilized, and the hinge point is used as a fulcrum, so that the vaginal dilator is balanced left and right, and the influence of the gravity of the dilator is reduced; 2) the doctor holds the handle (27), and the handle (27) is hinged with the base (15), so that the influence of external holding force of the doctor can be reduced.

The advantages of this embodiment are: the influence of the gravity of the device and the external force held by a doctor on the vaginal expansion is reduced, the control chip (23) analyzes the expansion difficulty of the inner side and the outer side of the vagina and the result of the limit of the expansion of the inner side and the outer side of the vagina is more accurate, and the electric vaginal dilator is safer and more reliable.

Claims

1. The utility model provides an electronic external genitals that expands, includes expansion piece (1), expansion piece (2) down, multi-bar drive mechanism, power supply and controlling means, its characterized in that: the multi-rod transmission mechanism comprises a lower expansion sheet connecting rod (3), a screw rod 1 (4), a nut 1 (5), a sliding block (6), an upper expansion sheet connecting rod (7), a screw rod 2 (9) and a nut 2 (10), and the power source and control device comprises: the bevel gear steering gear comprises a bevel gear steering gear 1 (8), a bevel gear steering gear 2 (11), a clamping groove (12), a spring (13), a base (15), a bevel gear 1 (16), a bevel gear 2 (17), a sensor 1 (18), a sensor 2 (19), a button (20), a motor 1 (21), a motor 2 (22), a control chip (23), a battery (24), a power source and control box (25), an unlocking device (14) or an electromagnet (26) and a handle (27); the upper expansion piece connecting rod (7) and the upper expansion piece (1) can be conveniently connected and detached, and the lower expansion piece connecting rod (3) and the lower expansion piece (2) can be conveniently connected and detached; the lower expansion piece connecting rod (3) forms a revolute pair with the screw rod 1 (4) and the screw rod 2 (9) respectively, the screw rod 1 (4) and the screw rod 2 (9) can rotate around the central line of the screw rod, the screw rod 1 (4) and the nut 1 (5) form a screw pair, the sliding block (6) and the upper expansion piece connecting rod (7) form a moving pair, the sliding block (6) can move on the upper expansion piece connecting rod (7), the sliding block (6) is hinged with the nut 1 (5), the screw rod 2 (9) and the nut 2 (10) form a screw pair, and the upper expansion piece connecting rod (7) is hinged with the nut 2 (10); the lower expansion piece connecting rod (3) and the clamping groove (12) can be conveniently connected and detached, the screw rod 1 (4) and the bevel gear steering gear 1 (8) can be conveniently connected and detached, and the screw rod 2 (9) and the bevel gear steering gear 2 (11) can be conveniently connected and detached; the bevel gear redirector 1 (8) and the base (15) form a rotating pair, the bevel gear redirector 1 (8) can rotate around the bevel gear center line, the bevel gear redirector 1 (8) is meshed with the bevel gear 1 (16), the bevel gear 1 (16) and the base (15) form a rotating pair, the bevel gear redirector 2 (11) can rotate around the bevel gear center line, the bevel gear redirector 2 (11) is meshed with the bevel gear 2 (17), the bevel gear 2 (17) and the base (15) form a rotating pair, the base (15) and the clamping groove (12) form a moving pair, the clamping groove (12) can slide up and down, a spring (13) is arranged between the clamping groove (12) and the base (15) to enable the clamping groove (12) to move upwards, the base (15) is fixedly connected with the power source and the control box (25), and the sensor 1 (18), The sensor 2 (19), the button (20), the motor 1 (21) and the motor 2 (22) are arranged in a power source and control box (25); an output shaft of the motor 1 (21) is connected with the sensor 1 (18), the other end of the sensor 1 (18) is connected with the bevel gear 1 (16), the bevel gear 1 (16) drives the screw rod 1 (4) to rotate, an output shaft of the motor 2 (22) is connected with the sensor 2 (19), the other end of the sensor 2 (19) is connected with the bevel gear 2 (17), and the bevel gear 2 (17) drives the screw rod 2 (9) to rotate.

2. The motorized vaginal dilator of claim 1, wherein: one end of each of the upper expansion piece (1) and the lower expansion piece (2) is provided with a groove with an opening towards the central line, the specific form is that the opening of the groove of the upper expansion piece (1) is downward, the opening of the groove of the lower expansion piece (2) is upward, the upper expansion piece (1) and the lower expansion piece (2) are disposable, the lower expansion piece connecting rod (3) is provided with three bosses, the upper expansion piece connecting rod (7) is provided with one boss, the bevel gear steering gear 1 (8) is provided with a bevel gear and a groove, the bevel gear steering gear 2 (11) is provided with a bevel gear and a groove, the clamping groove (12) is provided with two grooves, and the upper ends of the screw rod 1 (4) and the screw rod 2 (9) are respectively provided with one boss; the upper expansion piece (1) and the lower expansion piece (2) can be respectively connected with the upper expansion piece connecting rod (7) and the lower expansion piece connecting rod (3) in a boss inserting groove mode, the upper expansion piece connecting rod (7) and the lower expansion piece connecting rod (3) can be connected with the clamping groove (12) in a boss inserting groove mode, and the screw rods 1 (4) and 2 (9) can be respectively connected with the bevel gear steering gear 1 (8) and the bevel gear steering gear 2 (11) in a boss inserting groove mode.

3. The motorized vaginal dilator of claim 1, wherein: the unlocking device (14) is hinged with the base (15), the clamping groove (12) can be pushed to move downwards by rotating the unlocking device (14) anticlockwise, and the control chip (23) and the battery (24) are installed in the power source and the control box (25).

4. The motorized vaginal dilator of claim 1, wherein: the electromagnet (26) is installed on the base (15), the electromagnet (26) can push the clamping groove (12) to move downwards, the action of the electromagnet (26) is controlled by the button (20), the control chip (23) and the battery (24) are installed on the handle (27) respectively, the handle (27) is hinged with the base (15), and the rest devices except the handle (27), the button (20), the control chip (23) and the battery (24) are balanced with respect to the hinge point by gravity moment.

5. The motorized vaginal speculum of claim 2 or 3, wherein: the control chip (23) receives signals from the sensors 1 (18) and 2 (19), can control the motors 1 (21) and 2 (22) to rotate, and can analyze the rotation resistance of the screw rods 1 (4) and 2 (9) according to the signals, thereby analyzing the difficulty of expansion of the inner side and the outer side of the vagina and the limits of expansion of the inner side and the outer side, so that the vaginal dilator can fully expand the outer side and the inner side of the vagina, and the force applied to tissues can be kept in a safe range.