CN113456009B

CN113456009B - Visual expander

Info

Publication number: CN113456009B
Application number: CN202110914371.0A
Authority: CN
Inventors: 魏信鑫; 熊斌; 夏金凤
Original assignee: Hangzhou Weixin Medical Technology Co ltd
Current assignee: Hangzhou Weixin Medical Technology Co ltd
Priority date: 2021-08-10
Filing date: 2021-08-10
Publication date: 2022-08-05
Anticipated expiration: 2041-08-10
Also published as: CN113456009A; WO2023015728A1

Abstract

The invention discloses a visual expander, which comprises an expanding module and a visual module, wherein the expanding module comprises a first expanding structure, the first expanding structure comprises an upper expanding piece and a lower expanding piece, the upper expanding piece and the lower expanding piece are connected and can rotate relatively, the upper expanding piece and the lower expanding piece are switched between an opening state and a basic closing state in the relative rotation process, when the upper expanding piece and the lower expanding piece are in the opening state, an inspection channel is formed between the upper expanding piece and the lower expanding piece, the lower expanding piece is provided with a containing part, one end of the containing part is provided with a closed visual position, the closed visual position is opposite to the inspection channel, the visual module is contained in the containing part, and the visual end of the visual module faces the closed visual position. This application carries out an organic whole to visual module through the portion of holding and holds to through the setting of sealing visual position, seal the protection to the visual end of visual module under the condition that does not influence visual function, avoided visual module directly to expose in inspection channel, make visual module can reuse, and avoided the infection to the vagina.

Description

Visual expander

Technical Field

The invention relates to the technical field of medical instruments, in particular to a visual dilator.

Background

Vaginal dilator is a medical instrument commonly used in gynecological disease screening and diagnosis. In order to improve the visual effect of the doctor in the screening or diagnosis, a light source integrated on the vaginal dilator or a light source and a lens integrated as a visual module is presented. The vaginal dilator belongs to disposable consumables, but the cost of light source and camera lens is higher, if also use as the consumables and can cause the wasting of resources, the problem that the cost is high, however current vaginal dilator integrated light source and camera lens are outer hourglass, and reuse light source and camera lens can increase the infection risk, therefore current vaginal dilator still can not realize the reuse of visual module.

Disclosure of Invention

In order to overcome the defects in the prior art, the invention provides a visual dilator.

The invention discloses a visual dilator, which comprises:

the expansion module comprises a first expansion structure, the first expansion structure comprises an upper expansion piece and a lower expansion piece, the upper expansion piece and the lower expansion piece are connected and can rotate relatively, the upper expansion piece and the lower expansion piece are switched between an open state and a basic closed state in the relative rotation process, when the upper expansion piece and the lower expansion piece are in the open state, an inspection channel is formed between the upper expansion piece and the lower expansion piece, the lower expansion piece is provided with an accommodating part, one end of the accommodating part is provided with a closed visible position, and the closed visible position is opposite to the inspection channel; and

and the visual module is accommodated in the accommodating part, and the visual end of the visual module faces the closed visual position.

According to an embodiment of the present invention, the closed visible position extends into the inspection channel, and the visible end of the visible module is attached to the closed visible position.

According to an embodiment of the present invention, the visual module includes a housing, a light source element and a control element, the housing is disposed in the accommodating portion, the light source element is disposed in the housing and faces the closed visual position, and the control element is disposed in the housing and connected to the light source element.

According to an embodiment of the present invention, the visual module further includes a visual element, the visual element is disposed on the housing and attached to the closed visual field, and the visual element is connected to the control element.

According to an embodiment of the present invention, the light source unit is disposed around the vision unit.

According to an embodiment of the present invention, the visual module further includes a power source disposed in the housing and respectively connected to the light source, the control member and the visual member.

According to an embodiment of the present invention, the lower expansion piece is provided with a fitting limit position, the visual module further includes an elastic fitting piece, the elastic fitting piece is disposed at an end of the housing away from the inspection channel, and when the housing is disposed in the accommodating portion, the elastic fitting piece is clamped at the fitting limit position, so that the visual piece on the housing is tightly fitted to the closed visual position.

According to one embodiment of the invention, the elastic attaching piece comprises an attaching frame body, an attaching elastic part and an attaching limiting part, the attaching frame body is arranged on the shell, one end of the attaching elastic part is connected to the attaching frame body, the attaching limiting part is movably connected to the attaching frame body and connected with the other end of the attaching elastic part, the attaching limiting part is provided with a limiting end which acts on the attaching limiting part to enable the attaching elastic part to deform, when the shell is arranged on the accommodating part, the attaching limiting part is loosened, the attaching elastic part resets and acts on the attaching limiting part to enable the limiting end to be clamped on the attaching limiting position.

According to an embodiment of the invention, the elastic attaching member further comprises an ejecting part, the ejecting part comprises an ejecting frame and an ejector, the attaching frame body is movably arranged on the ejecting frame, one end of the ejector is connected with the ejecting frame, the other end of the ejector is connected with the attaching frame body, and when the limiting end is separated from the attaching limiting position, the ejector acts on the attaching frame body and drives the shell to eject from the accommodating part.

According to an embodiment of the present invention, the lower expanding member includes a lower expanding section and a holding portion, the holding portion has a connecting end, the connecting end is connected to the lower expanding section, the upper expanding member is connected to the connecting end and can rotate relatively, when the lower expanding member is in an expanded state, an inspection channel is formed between the upper expanding member and the lower expanding section, one end of the accommodating portion is communicated with the inside of the holding portion, and the other end of the accommodating portion extends into the connecting end and faces the inspection channel.

According to an embodiment of the present invention, the expansion module further includes a second expansion structure, the second expansion structure includes two side expansion pieces, the two side expansion pieces are respectively rotatably connected to two opposite sides of the lower expansion piece, in a process that the upper expansion piece and the lower expansion piece are relatively opened, one end of each of the two side expansion pieces respectively slides along the upper expansion piece in opposite directions, the other end of each of the two side expansion pieces is relatively opened, an inspection channel is formed between the upper expansion piece, the lower expansion piece and the two side expansion pieces, in a process that the upper expansion piece and the lower expansion piece are relatively closed, one end of each of the two side expansion pieces respectively slides along the upper expansion piece in opposite directions, the other end of each of the two side expansion pieces is relatively closed, and the two side expansion pieces are collected in a containing space formed after the upper expansion piece and the lower expansion piece are closed.

According to an embodiment of the present invention, the expansion module further includes a locking member, the locking member includes a first locking portion and a second locking portion, the first locking portion and the second locking portion are disposed on the upper expansion member and the lower expansion member, the first locking portion and the second locking portion are detachably connected, when the first locking portion is connected to the second locking portion, the upper expansion member and the lower expansion member are in a locked state and act on the upper expansion member, and a connection position of the first locking portion and the second locking portion is changed, so that an angle of relative opening between the upper expansion member and the lower expansion member is changed, and the angle is changed to act on the second locking portion, the first locking portion is detached from the second locking portion, and the upper expansion member and the lower expansion member are changed to an unlocked state.

The beneficial effect of this application lies in: carry out an organic whole through holding portion and hold visual module to through the setting of sealing visual position, seal the protection to the visual end of visual module under the condition that does not influence visual function, avoided visual module directly to expose in the inspection passageway, make visual module can reuse, and avoided the infection to the vagina, thereby avoided visual module to use as the consumptive material, resource utilization is high, and is with low costs.

Drawings

The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the application and together with the description serve to explain the application and not to limit the application. In the drawings:

FIG. 1 is a schematic structural view of the visual dilator in an embodiment in an expanded state;

FIG. 2 is a schematic structural diagram of the visible dilator in a closed state in the embodiment;

FIG. 3 is a cross-sectional view of a visible dilator in an embodiment;

FIG. 4 is a schematic structural diagram of an upper expansion piece in the embodiment;

FIG. 5 is a schematic structural view of a lower expansion piece in the embodiment;

FIG. 6 is an enlarged view of the portion A of FIG. 4 in the example;

FIG. 7 is an enlarged view of the portion B of FIG. 5 in the example;

FIG. 8 is a schematic structural diagram of a visual module according to an embodiment;

FIG. 9 is a schematic structural diagram of an elastic fitting member according to an embodiment;

FIG. 10 is an enlarged view of the portion C of FIG. 3 in the embodiment;

FIG. 11 is a schematic structural diagram of a lower expansion piece and a side expansion piece in the embodiment.

Detailed Description

In the following description, for purposes of explanation, numerous implementation details are set forth in order to provide a thorough understanding of the various embodiments of the present invention. It should be understood, however, that these implementation details are not to be interpreted as limiting the invention. That is, in some embodiments of the invention, such implementation details are not necessary. In addition, some conventional structures and components are shown in simplified schematic form in the drawings.

It should be noted that all the directional indications such as up, down, left, right, front and rear … … in the embodiment of the present invention are only used to explain the relative positional relationship, movement, etc. between the components in a specific posture as shown in the drawings, and if the specific posture is changed, the directional indication is changed accordingly.

In addition, the descriptions related to the first, the second, etc. in the present invention are only used for description purposes, do not particularly refer to an order or sequence, and do not limit the present invention, but only distinguish components or operations described in the same technical terms, and are not understood to indicate or imply relative importance or implicitly indicate the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, technical solutions between various embodiments may be combined with each other, but must be realized by a person skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination should not be considered to exist, and is not within the protection scope of the present invention.

As used herein, the term "substantially closed" and grammatical related terms refer to the relative structural arrangement of two objects: one of the objects is positioned perfectly closed to the other object or one of the objects is positioned in such a way that it is immediately recognizable as closed to the other object although not perfectly closed to the other object. A relative structural arrangement between two objects that is not perfectly closed but immediately recognizable as closed due to acceptable tolerances suitable for manufacturing a device of the type described herein is considered to be positioned substantially closed.

As used herein, the term "substantially circular" and grammatically related terms refer to a perfect circle or a shape that, although not a perfect circle, can be immediately recognized as a circle. A cross-sectional shape that is not perfectly circular but immediately recognizable as circular due to acceptable tolerances suitable for manufacturing devices of the type described herein is considered substantially circular.

As used herein, the term "substantially orthogonal" and grammatically related terms refer to the relative structural arrangement of two objects: one of the objects is positioned perfectly orthogonal to the other or one of the objects is positioned in a manner that, although not perfectly orthogonal to the other, is immediately recognizable as being orthogonal to the other. Relative structural arrangements between two objects that are not perfectly orthogonal, but which can immediately be identified as orthogonal, due to acceptable tolerances suitable for manufacturing devices of the type described herein, are considered to be positioned substantially orthogonally.

For further understanding of the contents, features and effects of the present invention, the following embodiments are enumerated in conjunction with the accompanying drawings, and the following detailed description is given:

example one

Referring to fig. 1 and 3, fig. 1 is a schematic structural view of the visible dilator in the embodiment in an open state, fig. 2 is a schematic structural view of the visible dilator in the embodiment in a closed state, and fig. 3 is a sectional view of the visible dilator in the embodiment. The visual dilator in this embodiment includes a dilation module 1 and a visualization module 2. The expansion module 1 comprises a first expansion structure, the first expansion structure comprises an upper expansion piece 11 and a lower expansion piece 12, the upper expansion piece 11 and the lower expansion piece 12 are connected and can rotate relatively, the upper expansion piece 11 and the lower expansion piece 12 are switched between an open state and a basically closed state in the relative rotation process, when the upper expansion piece and the lower expansion piece are in the open state, an inspection channel is formed between the upper expansion piece 11 and the lower expansion piece 12, the lower expansion piece 12 is provided with an accommodating part 1221, one end of the accommodating part 1221 is provided with a closed visual position 12211, and the closed visual position 12211 is opposite to the inspection channel. The visible module 2 is accommodated in the accommodating portion 1221, and the visible end of the visible module 2 faces the closed visible position 12211. Carry out an organic whole through holding 1221 and hold visual module 2 to through the setting of sealed visual position 12211, seal the protection to visual end of visual module 2 under the condition that does not influence visual function, avoided visual module 2 directly to expose in the inspection passageway, make visual module can reuse, and avoided the infection to the vagina, thereby avoided visual module to use as the consumptive material, resource utilization is high, and is with low costs.

Referring to fig. 4, fig. 4 is a schematic structural diagram of the upper expansion piece in the embodiment. Further, the upper expanding member 11 includes an upper expanding section 111 and an inspecting section 112. The inspection section 112 is connected with the upper expanding section 111, the inspection section 112 is connected with the lower expanding piece 12 and can rotate relatively, an inspection opening 1121 is formed in the inspection section 112, when the inspection section is in an open state, an inspection channel is formed between the upper expanding section 111 and the lower expanding piece 12, and the inspection opening 1121 faces the inspection channel. When the doctor determines to perform a detailed examination further, another medical device, such as a colposcope, may be inserted into the examination opening 1121, and the microscopic end of the other medical device is located in the examination channel to complete the further examination, and the examination opening 1121 is disposed toward the examination channel, so that the other medical device can enter the examination channel to perform an examination operation. Specifically, the cross section of the upper expanding section 111 is arc-shaped, and one surface of the upper expanding section 111, which is back to the lower expanding piece 12, is arc-shaped. Preferably, the cross section of the upper expanding section 111 is arc-shaped in a semicircular shape, and the surface of the upper expanding section 111 facing away from the lower expanding member 12 is a semicircular arc-shaped surface. The arc or semi-circle shape of the surface of the upper dilating segment 111 can avoid the injury to the vagina during dilation. Preferably, the first head portion 1111 is arranged at the tail end of the upper dilating segment 111, the first head portion 1111 is of an arc-shaped structure, the upper dilating segment 111 can conveniently enter the vagina through the arrangement of the first head portion 1111, and the vagina is prevented from being damaged when the upper dilating segment is opened. The first inlet 1111 of the present embodiment is a quarter of an oval sphere or a round sphere, which is adapted to the upper expanding section 111, so that the first inlet is integrally connected to the upper expanding section 111. The inspection section 112 is integrally connected to the upper dilating section 111. Specifically, the inspection section 112 includes a transition plate 1123 and two side plates 1124. One end of the transition plate 1123 is integrally connected with the upper expanding section 111, the two side plates 1124 are respectively connected with the other end of the transition plate 1123, and the transition plate 1123 and the two side plates 1124 are matched to form an inspection opening 1121. The cross section of the end, connected with the upper expansion section 111, of the transition plate 1123 is arc-shaped, so that the transition plate 1123 can be connected with the upper expansion section 111 integrally in a matched manner to form a smooth transition structure, which is convenient for protecting the vaginal opening, the cross section of the other end, away from the upper expansion section 111, of the transition plate 1123 is U-shaped, and the two side plates 1124 are respectively and correspondingly connected to the open ends of the U-shaped transition plate 1123, so that the inspection opening 1121 formed by matching the transition plate 1123 with the two side plates 1124 is also U-shaped. Preferably, a side of the transition plate 1123 facing away from the lower flared piece 12 has a curved portion 11231, the curved portion 11231 is located at an end of the transition plate 1123 adjacent to the upper flared portion 1111, and the curved portion 11231 has an obtuse angle. The curved position 11231 is arranged to facilitate the folding of the upper expanding section 111 and the lower expanding member 12 and form a substantially closed state, and when the upper expanding section 111 and the lower expanding member 12 are opened and form an opened state, the curved position 11231 can enable the upper expanding section 111 to be opened in place, so as to ensure that the inspection channel has enough expanding space to complete the inspection. In addition, when the upper dilating segment 111 and the lower dilating segment 12 are in a basically closed state and enter the vagina, the transition plate 1123 with the arc position 11231 can limit the depth of the upper dilating segment 111 entering the vagina, so as to avoid entering too deep.

Preferably, the upper expanding piece 11 further comprises a pressing portion 113, the pressing portion 113 is disposed on the inspection section 112, and the pressing portion 113 applies a force to the pressing portion 113, so that the pressing portion 113 drives the upper expanding piece 11 and the lower expanding piece 12 to rotate relatively. Through the setting of pressing the portion 113, increased the doctor and controlled and expanded the piece 11 and expand the convenience when 12 relative rotations down, from the formation of the inspection channel of being convenient for, promoted visual expander simple operation nature. Specifically, the pressing portion 113 is located between the two side plates 1124, one end of the pressing portion 113 is connected to the two side plates 1124, and the other end thereof extends away from the transition plate 1123. The pressing portion 113 in this embodiment is plate-shaped, and two side edges of the pressing portion are integrally connected to the two side plates 1124 respectively, so that the transition plate 1123, the two side plates 1124 and the pressing portion 113 cooperate to form an inspection opening 1121. Preferably, an angle of intersection between an extension line of the pressing portion 113 and an opposite extension line of the upper expanding section 111 is an obtuse angle. Preferably, the pressing portion 113 has an anti-slip texture on the surface of the other end away from the transition plate 1123 to increase the friction force when applying force to the pressing portion 113, so as to avoid slipping when applying force to the pressing portion 113 by the doctor. Preferably, the upper expansion section 111 is made of high-transparency plastic, so that the transparency of the upper expansion section 111 is ensured, and the interference to the inspection is avoided. Preferably, the upper expanding section 111, the inspecting section 112 and the pressing section 113 in this embodiment are integrally formed.

Referring to fig. 5, fig. 5 is a schematic structural diagram of the lower expansion piece in the embodiment, further, the lower expansion piece 12 includes a lower expansion section 121 and a holding portion 122, the holding portion 122 has a connecting end 123, the connecting end 123 is connected to the lower expansion section 121, the inspection section 112 is connected to the connecting end 123 and can rotate relatively, when in an open state, an inspection channel is formed between the upper expansion section 111 and the lower expansion section 121, one end of the accommodating portion 1221 having the closed visible position 12211 extends into the connecting end 123 and is opposite to the inspection channel, and the other end of the accommodating portion 1221 is located in the holding portion 122. The holding part 122 is arranged to facilitate the doctor to hold the expansion module 1. The accommodating part 1221 is integrally formed on the holding part 122, and the visible module 2 is integrally accommodated and carried by the accommodating part 1221, so that the visible dilator is integrally designed, and the visible function of the visible module 2 is integrally realized. Specifically, the cross section of the lower expanding section 121 is arc-shaped, and one surface of the lower expanding section 121, which faces away from the upper expanding section 111, is an arc-shaped surface. Preferably, the cross section of the lower expansion segment 121 is curved in a semicircular shape, and the surface of the lower expansion segment 121 facing away from the upper expansion segment 111 is a semicircular curved surface. The arc or semi-circle shape of the surface of the lower dilating segment 121 can avoid the injury to the vagina during dilation. Preferably, the end of the lower dilating segment 121 is provided with a second head 1211, the second head 1211 is of an arc-shaped structure, and the lower dilating segment 121 can enter the vagina conveniently by the arrangement of the second head 1211, and the vagina can be prevented from being injured during dilating. The second inlet 1211 is a quarter of an oval or spherical shell, which is adapted to the lower divergent section 121, and is thus integrally connected to the upper divergent section 111. The lower expanding section 121 and the upper expanding section 111 in this embodiment are adapted to each other, and are in a substantially closed state after being folded, and a receiving space is formed between the two in the substantially closed state, and the cross sections of the two are substantially circular. The substantially circular shape in this embodiment may be a circular shape, an ellipse having a substantially circular shape, or another substantially circular shape. The second inlet 1211 closes in synchronization with the first inlet 1111, and fits into a half-oval or spherical housing. It can be understood that, when the doctor uses the visual dilator, the lower dilating segment 121 and the upper dilating segment 111 are in a substantially closed state, at this time, the second entry head 1211 and the first entry head 1111 which enter the vagina first in a closed state are in a first state, and the second entry head 1211 and the first entry head 1111 are matched to form an oval sphere or spherical shell shape, so that the lower dilating segment 121 and the upper dilating segment 111 in the substantially closed state can smoothly enter the vagina, thereby avoiding vaginal injury and reducing discomfort of the patient during examination. The connection end 123 is integrally connected with the lower expanding section 121. Specifically, the connecting end 123 includes a connecting plate 1231 and two mounting plates 1232, one end of the connecting plate 1231 is integrally connected to the lower expanding section 121, the other end of the connecting plate 1231 is integrally connected to the holding portion 122, a curved arc 12311 is provided in the middle of the connecting plate 1231, and the shape of the lower expanding part 12 is matched with that of the upper expanding part 11 through the arrangement of the curved arc 12311. The two mounting plates 1232 are respectively integrally connected to two opposite sides of the connecting plate 1231, and the two mounting plates 1232 are both close to the holding portion 122. The two side plates 1124 are respectively located at the outer sides of the two mounting plates 1232, and the side plates 1124 and the mounting plates 1232 are in rotating fit through the matching of the rotating shaft and the shaft hole, so that the upper expanding piece 11 and the lower expanding piece 12 are connected and can rotate relatively.

The end of the housing 1221 having the closed viewing position 12211 in this embodiment extends specifically to the space between the two mounting plates 1232 and is opposite to the inspection passage. One end of the accommodating part 1221 is opposite to the inspection channel, so that the visual end of the visual module 2 can be conveniently inspected towards the inspection channel. The one end that the holding part 1221 has the visual position 12211 of closure can adopt high-transparent plastics integrated into one piece, and high-transparent plastics have high permeability, can not influence the realization of the visual function of the visual end of visual module 2, and of course also can adopt other materials that have high permeability to make, and the visual position 12211 of closure can adopt high lens piece in the preferred scheme. The accommodating portion 1221 in this embodiment has one end of the closed visible part 12211 in a more regular polyhedron shape, for example, an approximately rectangular parallelepiped, and the closed visible part 12211 facing the inspection passage is a flat surface or an inclined flat surface. So, seal visual position 12211 and when not influencing the visual function realization of the visual end of visual module 2, still realize the closure protection to the visual end of visual module 2, avoid the visual end of visual module 2 directly to expose in the inspection passageway that carries out the inspection to the vagina to realize the reuse of visual module 2, also avoid visual module 2 to cause the infection to the vagina.

Preferably, the closed visual position 12211 extends into the inspection channel, and the visual end of the visual module 2 is attached to the closed visual position 12211. It can be understood that the examination channel extends from the exterior of the vagina to the interior of the vagina, and the closer the visible end of the visible module 2 extends into the examination channel, the closer it is to the interior of the vagina, the better the visible effect will be, and the faster and more accurate the examination will be. Under the condition that seals visual position 12211 and has stopped the vagina and to the visual end influence of visual module 2, this moment, will seal visual position 12211 by the position between two mounting panels 1232, extend in towards the inspection channel, visual end that can the adaptation of visual module 2 extends in towards the inspection channel to promote visual effect. In addition, if there is a gap between the visible end of the visible module 2 and the closed visible position 12211, the visible effect of the visible end will be affected, and the visible end of the visible module 2 is attached to the closed visible position 12211 to eliminate the gap, thereby ensuring the visible effect of the visible module 2.

Preferably, an opening 12212 is opened at an end of the accommodating portion 1221 away from the closed visual position 12211. The vision module 2 passes through the opening 12212 and is accommodated in the accommodating portion 1221. Through the opening 12212, the convenience of accommodating and withdrawing the accommodating portion 1221 of the visual module 2 is improved. Specifically, the opening 12212 is a notch formed in an end surface of the grip portion 122 at an end remote from the closed visual site 12211. Preferably, the opening 12212 is L-shaped, specifically, an L-shaped notch is formed in the outer wall of the downward-extending section 121 of the holding portion 122 near the end surface of the holding portion 122 having the notch, the L-shaped notch is communicated with the end surface notch to form the opening 12212, and the opening 12212 is shaped to facilitate the receiving and withdrawing of the visual module 2. Preferably, opening 12212 is provided with the elasticity cardboard, and visual module 2 holds back in holding portion 1221 through opening 12212, and the elasticity cardboard can form the joint state with the outer wall of visual module 2, and the fixed visual module 2 of being convenient for holds the state in holding portion 1221, maintains the gesture of visual module 2.

Preferably, the holding portion 122 is provided with a control bit 1222, and the control bit 1222 is connected with the visual module 2. Control position 1222 and lower expansion segment 121 all lie in the same one side of holding portion 122, and control position 1222 sets up the outer wall at holding portion 122, and it is connected with visual module 2 that lies in accommodating portion 1221 through holding portion 122, and when handheld holding portion 122, the finger covers in control position 1222 naturally, acts on control position 1222 through the finger and can realize the convenient control to controllable module 2. Thus, through the setting of the control position 1222, the operation of the visual module 2 by the doctor is more convenient. The control bit 1222 in this embodiment includes a plurality of function buttons, the number of the function buttons may be determined according to actual situations, in a specific application, the control bit 1222 is a leaf spring type button structure, for example, an avoiding gap is opened in the grip portion 122, the control bit 1222 is located in the avoiding gap, one end of the control bit 1222 is connected to the grip portion 122, and the other end of the control bit 1222 is pressed by the finger of the doctor, so as to act on the visible module 2 inside the grip portion 122 for operation, preferably, the surface of the control bit 1222 has a texture, so as to avoid slipping when pressed, and thus, the operation is accurate. Preferably, a control bit protection ring 12221 is disposed on the surface of the grip portion 122, the control bit protection ring 12221 is disposed around the control bit 1222, and the height of the control bit protection ring 12221 is greater than the height of the control bit 1222 along the direction perpendicular to the grip portion 122, so that the control bit 1222 is protected by the control bit protection ring 12221 in a "dam" manner, thereby preventing the control bit 1222 from being contaminated due to outflow of vaginal secretion during detection.

Preferably, the end of the accommodating portion 1221 extending into the connecting end 123 further has a bearing position 12213. Other medical instruments outside can be detachably connected to the bearing position 12213 and pass through the inspection hole 1121. Through bearing position 12213 setting to bear when other medical instrument inspect in the inspection passageway, promoted the inspection convenience. The bearing position 12213 in this embodiment is an end surface of the accommodating portion 1221 at one end between the two mounting plates 1232, which is adjacent to the closed viewing position 12211.

Referring to fig. 6 and 7 together, fig. 6 is an enlarged view of a portion a of fig. 4 in the embodiment, and fig. 7 is an enlarged view of a portion B of fig. 5 in the embodiment. Furthermore, the expansion module 1 further includes a locking member 14, the locking member 14 includes a first locking portion 141 and a second locking portion 142, the first locking portion 141 and the second locking portion 142 are respectively disposed on the upper expansion piece 11 and the lower expansion piece 12, the first locking portion 141 and the second locking portion 142 can be detachably connected, when the first locking portion 141 and the second locking portion 142 are connected, the upper expansion piece 11 and the lower expansion piece 12 are in a locking state and act on the upper expansion piece 11, in this embodiment, the first locking portion acts on the pressing portion 113 of the upper expansion piece 11, the connection position of the first locking portion 141 and the second locking portion 142 is changed, so that the angle of the relative opening between the upper expansion piece 11 and the lower expansion piece 12 is changed, the first locking portion 141 and the second locking portion 142 are separated, and the upper expansion piece 11 and the lower expansion piece 12 are changed into an unlocking state. The upper expanding piece 11 and the lower expanding piece 12 are in an unlocking state, the upper expanding piece 11 and the lower expanding piece 12 can freely rotate relatively, and the upper expanding piece 11 and the lower expanding piece 12 are in a locking state, so that the upper expanding piece 11 and the lower expanding piece 12 are locked and cannot rotate relatively. The upper expanding piece 11 and the lower expanding piece 12 in the opening state are locked by the matching of the first locking part 141 and the second locking part 142, so that the postures of the upper expanding piece 11 and the lower expanding piece 12 in the opening state are unchanged, the inspection channel is maintained, and the smooth inspection is ensured. And the flexible adjustment of the size of the examination channel is realized by operating the pressing part 113 of the upper expanding piece 11 so as to adapt to the examination of different patients. The first locking portion 141 includes a plurality of first locking positions 1411, the plurality of first locking positions 1411 are sequentially arranged on the upper expanding member 11 at intervals along the arc direction, the second locking portion 142 includes a second locking position 1421, the second locking position 1421 is disposed on the lower expanding member 12 and is adapted to the first locking position 1411, the second locking position 1421 and the first locking position 1411 can be detachably connected to act on the upper expanding member 11, so that the second locking position 1421 is separated from a connection state of one first locking position 1411 and is connected to another first locking position 1411. Through the cooperation of the second locking position 1421 and the plurality of first locking positions 1411, multistage locking in the opening process of the upper expanding piece 11 and the lower expanding piece 12 is achieved, that is, multistage locking is achieved for the relative opening angle of the upper expanding piece 11 and the lower expanding piece 12, so that the inspection channel can be locked after being opened for an adaptive angle according to the actual size of the vagina. Specifically, the first locking positions 1411 are disposed on a surface of the side plate 1124 facing the mounting plate 1232, and the second locking positions 1421 are disposed on a surface of the mounting plate 1232 facing the side plate 1124. The plurality of first locking positions 1411 are sequentially arranged at intervals along an arc direction, where the arc direction specifically is: when acting force is applied to the pressing portion 113, the side plate 1124 rotates relative to the mounting plate 1232, and an arc-shaped routing, i.e., the arc direction, is formed in a relative rotation process of the side plate 1124 and the mounting plate 1232 at a certain point of the side plate 1124, so that the plurality of first locking positions 1411 are sequentially arranged at intervals along the arc direction, and after the side plate 1124 rotates relative to the mounting plate 1232, any one of the plurality of first locking positions 1411 can be in adaptive connection with the second locking position 1421 to form locking. In this embodiment, the first locking position 1411 is in the shape of a strip-shaped groove, the second locking position 1421 is in the shape of a strip-shaped block, when a force is applied to the pressing portion 113, the upper expansion section 111 and the lower expansion section 121 are relatively opened, the side plate 1124 rotates relative to the mounting plate 1232, when the second locking position 1421 falls on the first locking position 1411 of the plurality of first locking positions 1411, the first locking position 1411 and the second locking position 1421 form a snap-fit relationship, so as to form a locking state, so that the relative positions of the side plate 1124 and the mounting plate 1232 are fixed, so that the upper expansion section 111 and the lower expansion section 121 maintain the relatively opened state, and the relative opening angle between the upper expansion section 111 and the lower expansion section 121 is fixed, that is, when the size of the inspection channel is fixed, when a force is applied to the pressing portion 113 again, the second locking position 1421 slides out from the first locking position 1141 and can fall on any other subsequent first locking position 1411 of the plurality of first locking positions 1411, therefore, the upper expanding section 111 and the lower expanding section 121 can be maintained at different opening angles, and multi-stage locking is achieved to adapt to expansion detection of different vagina sizes.

Preferably, the second locking portion 142 further includes an elastic plate 1422 and an unlocking frame 1423, one end of the elastic plate 1422 is connected to the lower expanding member 12, and the other end of the elastic plate 1422 can swing relative to the lower expanding member 12, the second locking portion 1421 is disposed on the elastic plate 1422, one end of the unlocking frame 1423 is connected to the elastic plate 1422, the other end of the unlocking frame 1423 extends in a direction away from the lower expanding member 12, and acts on the unlocking frame 1423, and the elastic plate 1422 swings in a direction away from the first locking portion 1411, so that the second locking portion 1421 is separated from the first locking portion 1411. Through the arrangement of the elastic plate 1422, the second locking position 1421 is conveniently transferred between the plurality of first locking positions 1411, and through the cooperation of the elastic plate 1422 and the unlocking frame 1423, the second locking position 1421 is conveniently separated from the first locking position 1411 and maintains the separated state of the two, so that the upper expanding piece 11 and the lower expanding piece 12 are in the unlocked state. Specifically, the elastic notch 12321 is formed in the mounting plate 1232, the elastic plate 1422 is located in the elastic notch 12321, one end of the elastic plate 1422 is connected to the mounting plate 1232, and the other end of the elastic plate 1422 is suspended and arranged, so that the other end of the elastic plate 1422 can deform toward the inner side of the mounting plate 1232. When a force is applied to the pressing portion 113 to separate the second latching portion 1421 from one of the first latching portions 1411, the elastic plate 1422 is slightly deformed, so that the second latching portion 1421 is easily separated, and when the second latching portion 1421 falls into another first latching portion 1411, the deformed state of the elastic plate 1422 is reset, so that the second latching portion 1421 is easily inserted into another first latching portion 1411. Preferably, the unlocking frame 1423 is an L-shaped structure, and the unlocking frame 1423 in this embodiment is an L-shaped plate, which is vertically connected to the elastic plate 1422. The end of the unlocking frame 1423 away from the elastic plate 1422 has an unlocking button 14231, and the unlocking button 14231 is adjacent to the pressing portion 113, so as to facilitate the operation of the unlocking button 14231 by the finger. The force is applied to the unlocking button 14231, the unlocking frame 1423 acts on the elastic plate 1422, so that the elastic plate 1422 deforms to a larger angle toward the inner side of the mounting plate 1232, the second locking position 1421 is separated from the first locking position 1411, and the force applied to the unlocking button 14231 is maintained unchanged, so that the mounting plate 1232 and the side plate 1124 can freely rotate relatively, and the upper expanding section 111 and the lower expanding section 121 can freely open or close relatively, i.e., are in an unlocking state, thereby improving the convenience of taking out the vaginal dilator from the vagina after the examination is completed.

Preferably, the second latching portion 1421 has an inclined surface 14211 and a limiting surface 14212, and when acting on the pressing portion 113 of the upper expanding member 11, the first latching portion 1411 moves over the inclined surface 14211 of the second latching portion 1421, and the limiting surface 14212 limits the movement of the first latching portion 1411. In this embodiment, the inclined surface 14211 and the unlocking button 14231 are disposed on the same side, and the limiting surface 14212 is disposed opposite to the unlocking button 14231, that is, when the upper expanding section 111 and the lower expanding section 121 are opened from the substantially closed state as acting on the pressing portion 113, the first locking position 1411 slides relatively from the inclined surface 14211 of the second locking position 1421, otherwise, if the upper expanding section 111 and the lower expanding section 121 are to be changed from the relatively opened state to the substantially closed state, the first locking position 1411 interacts with the limiting surface 14212 of the second locking position 1421, and the limiting surface 14212 has no relative sliding angle, so as to limit the first locking position 1411. Thus, through the matching arrangement of the inclined surface 14211 and the limiting surface 14212, the first locking position 1411 only passes through the second locking position 1421 from the inclined surface 14211 of the second locking position 1421, but cannot pass through the second locking position 1421 from the limiting surface 14212 of the second locking position 1421, so that when a force is applied to the pressing portion 113, the upper expanding section 111 and the lower expanding section 121 can be relatively opened, and after the force applied by the pressing portion 113 disappears, the opening state of the upper expanding section 111 and the lower expanding section 121 can be still maintained, and the upper expanding section 111 and the lower expanding section 121 cannot be reversely closed, so that the upper expanding section 111 and the lower expanding section 121 can be conveniently opened, and the state that the non-reversely-closed state is stable is maintained, thereby forming the advantages that the inspection channel is conveniently opened, stably maintained, and cannot be reversely reduced. The limiting surface 14212 in this embodiment is a vertical surface of the second locking position 1421 and the elastic plate 1422. In this embodiment, the shape and size of the first locking position 1411 are adapted to the shape and size of the second locking position 1421, specifically, the strip-shaped groove of the first locking position 1411 has an inclined surface and a vertical surface structure adapted to the inclined surface 14211 and the limiting surface 14212 of the second locking position 1421, when the upper expanding section 111 and the lower expanding section 121 are relatively expanded, the inclined surface of the first locking position 1411 and the inclined surface 14211 of the second locking position 1421 stick to slide, otherwise, the vertical surface of the first locking position 1411 and the limiting surface 14212 of the second locking position 1421 are limited to each other, so that convenience when the upper expanding section 111 and the lower expanding section 121 are expanded, and stability of the non-reversible closed state is further improved.

Referring to fig. 8 to 10, fig. 8 is a schematic structural diagram of a visible module in an embodiment, fig. 9 is a schematic structural diagram of an elastic attachment member in an embodiment, and fig. 10 is an enlarged view of a portion C of fig. 3 in an embodiment. Further, the visual module 2 includes a housing 21, a light source 22 and a control member 23. The housing 21 is disposed on the lower expanding member 12, the light source member 22 is disposed on the housing 21 and faces the inspection passage, and the control member 23 is disposed on the housing 21 and connected to the light source member 22. The light source element 22 illuminates towards the inspection channel, increasing the brightness in the inspection channel and thus the visual effect. Specifically, the overall shape of the housing 21 is adapted to the shape of the inner space of the accommodating portion 1221, so that the housing 21 is accommodated in the accommodating portion 1221 in a fitting manner, one end of the housing 21 is located at one end of the accommodating portion 1221 extending to the mounting plate 1232, the light source 22 is disposed in the housing 21 and close to the end of the housing 21, and the light source 22 faces the closed visual position 12211, so that illumination is performed toward the inspection passage through the closed visual position 12211. The light source unit 22 in this embodiment may be a planar light source or an annular light source, for example, a flat lamp or an annular lamp made of LEDs, and the color of the light source may be white or blue to suit different inspection items. The control member 23 is electrically connected to the light source 22, the control member 23 is a PCB board integrated with a control circuit, and has a control button 231 integrated thereon, the control member 23 is fixedly installed in the housing 21, the control button 231 leaks from the housing 21 and is connected to a control bit 1222 on the holding portion 122, and the control button 1231 is operated by pressing the control bit 1222, so as to control the light source 22, for example, to control the on/off of the light source 22, and to control the switching of the light beams of different colors emitted by the light source 22.

Preferably, the visual module 2 further comprises a visual element 24, the visual element 24 is disposed on the housing 21 and attached to the closed visual position 12211, the visual element 24 faces the inspection channel, and the visual element 24 is connected to the control element 23. Through the setting of vision piece 24, realize making a video recording and putting outward the image in the inspection channel to further promote visual effect, the doctor accessible is put the image outward and is carried out the screening judgement of disease. In this embodiment, the vision element 24 is disposed at an end of the housing 21, the vision element 24 faces the closed visual position 12211 and is attached thereto, so that the image is taken through the closed visual position 12211 toward the inspection passage, the light source element 22 is adjacent to the vision element 24, and the light source element 22 provides illumination for the image taking of the vision element 24. Preferably, the light source 22 is disposed around the end surface of the housing 21 and sleeved outside the vision element 24, so that the light source 22 is disposed around the vision element 24, and provides uniform and high-quality illumination for the vision element 24, thereby ensuring the shooting quality. In a specific application, the vision element 24 may be a micro lens, and the light source element 22 may be an annular light source, such as an annular LED lamp. Preferably, the control part 23 is integrated with a wireless transmission module, so that the image shot by the vision part 24 is transmitted to an external display in a wireless transmission mode to be displayed, wired transmission is not needed, the whole vaginal dilator is simpler, and the convenience of a doctor in use is improved. The control of the visual element 24 is also provided with suitable control buttons 231, which are controlled by corresponding control bits 1222. Preferably, one end of the housing 21 is bent toward the inspection passage, and the light source unit 22 and the vision unit 24 are respectively disposed at the end of the housing 21 bent toward the inspection passage. The light source element 22 and the vision element 24 as the visual ends can extend into the detection channel by the structural arrangement that the shell 21 is bent towards the detection channel, so that the visual effect is improved. Seal visual position 12211 and extend to the inspection passageway by the position between two mounting panels 1232 in, make the inner space that the portion 1221 extends to the one end between two mounting panels 1232 form the structure of buckling, buckle the one end of casing 21 towards the inspection passageway, thereby with the inner space looks adaptation of portion 1221, let the setting at the light source spare 22 of casing 21 tip and vision piece 24 can with seal the visual position 12211 and laminate towards the inspection passageway, and stretch into in the inspection passageway, promote visual effect.

Preferably, the visual module 2 further includes a power supply element 25, and the power supply element 25 is disposed in the housing 21 and is connected to the light source element 22, the control element 23 and the visual element 24 respectively. Through the setting of power supply spare 25, for light source spare 22, control 23 and vision piece 24 supply power, realize the inside power supply of visual module 2, need not external power supply power to make visual module 2 become the project organization of integration, need not the power cord, purify the inspection environment, promoted the use convenience that expands the finder. Specifically, the power supply member 25 is disposed inside the housing 21. In a specific application, the power supply unit 25 may be a wired or wireless rechargeable battery, which is not described herein. Of course, in other embodiments, the power supply of the light source 22, the control 23 and the vision element 24 may be realized by an external power source, which is not limited herein.

Preferably, the end of the housing 21 remote from the viewing element 24 is provided with a balancing base 211. Through balanced base 211's setting, can realize that visual module 2's independent balance is placed, be convenient for visual module 2 take up use or assemble in the portion 1221 that holds, simultaneously, when visual module 2 adorns in the portion 1221, also can make expansion module 1 together realize balanced the placing, be convenient for vaginal dilator's placing and operation use. Specifically, the width that the one end of vision piece 24 was kept away from to casing 21 is greater than the width that casing 21 is close to the one end of vision piece 24 for casing 21 is whole to be big end down's result, and the terminal surface that casing 21 kept away from the one end of vision piece 24 sets up to the plane casing, forms balanced base 211, thereby realizes the level of visual module 2 and places. Preferably, the power supply unit 25 with heavier weight is close to the balance base 211, which can move down the overall gravity center of the visual module 2, further improving the stability of the visual module 2 when being placed in balance. The end of the grip portion 122 remote from the lower dilating segment 121 is provided with a balancing foot 1224. The shape of the balance foot 1224 fits the shape of the balance base 211, and the balance foot 1224 communicates with the opening 1222. When the accommodating portion 1221 accommodates the visual module 2, the balance legs 1224 are covered outside the balance base 211, so that the accommodating portion 1221 is further attached to the housing 21, and the overall balance is further improved.

Preferably, the lower expansion piece 12 is provided with a fitting limit position 1223, the visual module 2 further comprises an elastic fitting piece 26, the elastic fitting piece 26 is arranged at one end of the casing 21 far away from the inspection channel, and when the casing 21 is arranged in the accommodating part 1221, the elastic fitting piece 26 is clamped in the fitting limit position 1223, so that the casing 21 is close to one end of the visual piece 24 close to the inspection channel and tightly fits with the closed visual position 12211. It can be understood that, if the gap between the visual part 24 and the closed visual position 12211 is eliminated, the visual part 24 at the end of the casing 21 is required to maintain the close fitting state with the closed visual position 12211, and through the cooperation of the elastic fitting part 26 and the fitting limit position 1223, the end of the casing 21 close to the inspection channel is tightly fitted with the lower expansion part 12, that is, the visual part 24 is tightly fitted with the closed visual position 12211, and the gap is eliminated, so that the shooting quality of the visual part 24 is ensured.

The attachment limiting position 1223 is a notch opened in the holding portion 122. Elastic fitting piece 26 is including laminating support body 261, laminating elastic component 262 and the spacing portion 263 of laminating, casing 21 is located to laminating support body 261, the one end of laminating elastic component 262 is connected in laminating support body 261, the spacing portion 263 swing joint of laminating is in laminating support body 261, and be connected with the other end of laminating elastic component 262, the spacing portion 263 of laminating has spacing end 2631, act on the spacing portion 263 of laminating, make laminating elastic component 262 deformation, when casing 21 locates down expand piece 12, loosen the spacing portion 263 of laminating, laminating elastic component 262 resets and acts on the spacing portion 263 of laminating, make spacing end 2631 block locate laminating restriction position 1223. Through the clamping limit of the limit end 2631 and the limit position 1226, the elastic fitting part 26 can limit the accommodating part 1221 of the lower expanding part 12 in the shell 21, so that the visual part 24 can be tightly attached to the closed visual position 12211. Specifically, the attachment frame 261 is a U-shaped frame, an open end of the U-shaped frame is disposed at an end of the housing 21 away from the inspection channel, and one open end 2611 of the attachment frame 261 extends out of the housing 21. The spacing portion 263 of laminating is located laminating support body 261, its one end carries out the L type and buckles and pass laminating support body 261 and form spacing end 2631, spacing end 2631 and laminating support body 261 sliding connection, thereby can carry on spacingly to the activity direction of the spacing portion 263 of laminating, the other end of the spacing portion 263 of laminating passes behind casing 21 and carries out the L type and buckles and form effect end 2632, effect end 2632 sets up with open end 2611 is relative, the spacing portion 263 of whole laminating is U type structure, casing 21 reserves the breach of dodging that effect end 2632 removed. The attaching elastic portion 262 is a spring, one end of which is connected to the inner wall of the attaching frame body 261, and the other end of which is connected to the attaching limiting portion 263. When installing casing 21 into accommodating part 1221, two fingers act on action end 2632 and open end 2611 relatively, make the spacing portion 263 of laminating extrude laminating elasticity portion 262 and carry out compression deformation, spacing end 2631 is towards the inside removal of laminating support body 261 this moment, when casing 21 is installed into accommodating part 1221 and is in place, when seeing through the laminating visual position 12211 and the laminating of vision piece 24 promptly, loosen action end 2632 this moment, laminating elasticity portion 262 resets, make spacing end 2631 just pass laminating restriction position 1223, and the joint is in restriction position 1223, so form spacing joint to spacing end 2631 through laminating restriction position 1223, thereby make the visual piece 24 and the visual position 12211 of closing of casing 21 tip closely laminate, and maintain the laminating state stable unchangeable. In this embodiment, the elastic attachment member 26 may be disposed on the balance base 211, and in a specific application, the periphery of the balance base 211 protrudes outward to surround the acting end 2632 and the opening end 2611, so as to avoid interference and ensure the balance function.

Preferably, the elastic attaching member 26 further includes an ejecting portion 264, the ejecting portion 264 includes an ejecting frame 2641 and an ejector 2642, the attaching frame 261 is movably disposed on the ejecting frame 2641, one end of the ejector 2642 is connected to the ejecting frame 2641, and the other end is connected to the attaching frame 261, when the limiting end 2631 is separated from the attaching limiting position 1223, the ejector 2642 acts on the attaching frame 261 and drives the housing 21 to eject from the lower expanding member 21. Through the setting of the pop-up portion 264, the housing 21 is conveniently separated from the accommodating portion 1221, so that the separation of the visual module 2 is conveniently realized. Specifically, the pop-up rack 2641 is a U-shaped rack, and an open end thereof is mounted on an end of the housing 21 away from the inspection channel. The attachment frame 261 is slidably coupled within the eject frame 2641. The ejector 2642 includes an ejection spring 26421 and an ejection guide rod 26422, one end of the ejection guide rod 26422 is connected to the attachment frame 261, the other end of the ejection guide rod 26422 passes through the ejection frame 2641 and is in sliding connection with the ejection frame 2641, the ejection spring 26421 is sleeved outside the ejection guide rod 26422 and is respectively abutted against or connected to the ejection frame 2641 and the attachment frame 261, and the ejection guide rod 26422 guides the ejection spring 26421. When the housing 21 is installed in the lower expansion piece 12, the attachment frame body 261 slides in the ejection frame 2641, and compresses the ejection spring 26421, when the limiting end 2631 is clamped with the attachment limiting position 1223, the ejection spring 26421 maintains a compressed state, when the visual module 2 is separated from the accommodating part 1221, two fingers act on the acting end 2632 and the opening end 2611 again relatively, so that the limiting end 2631 is separated from the attachment limiting position 1223, at this time, the ejection spring 26421 resets, reversely ejects the attachment frame body 261, finally, the housing 21 is ejected out of the accommodating part 1221, and quick detachment of the visual module 2 is realized.

The inspection process in this example is as follows: two fingers act on the action end 2632 and the open end 2611 relatively again, the shell 21 is installed in the accommodating part 1221 until the limit end 2631 is clamped into the fit limit position 1223, the visual piece 24 positioned at the end part of the shell 21 is fitted with the closed visual position 12211, the action of installing the visual module 2 in the accommodating part 1221 is completed, then a doctor holds the holding part 122 with hands, the upper expansion section 111 and the lower expansion section 121 in a basically closed state extend into the vagina, then force is applied to the pressing part 113 to enable the upper expansion section 111 and the lower expansion section 121 to be opened relatively, the pressing part 113 is released after the holding part is opened to a proper position, and the upper expansion section 111 and the lower expansion section 121 are matched to form a stable inspection channel. Then, the doctor presses the function button on the control position 1222 to control the light source 22 and the vision element 24 to be turned on, and adjust the light source color of the light source 22 according to the requirement, and then performs the disease examination by observing the image placed outside the vision element 24, and when further examination is needed, passes another medical apparatus, such as a colposcope, through the examination opening 1121, and places the medical apparatus on the bearing position 12213 for examination. And after the examination is finished, the colposcope is withdrawn. The unlock button 14231 is then pressed, disengaging the first and

second locking portions

141, 142, which closes the upper and

lower dilating segments

111, 121 back out of the vagina. Then, two fingers act on the action end 2632 and the opening end 2611 relatively again, so that the limiting end 2631 is separated from the attaching limiting position 1223, the visual module 2 is withdrawn from the accommodating portion 1221 to wait for reuse, and the visual module 1 as a consumable is further processed.

Example two

Referring to fig. 11, fig. 11 is a schematic structural view of the lower expansion piece and the side expansion piece in the embodiment. The visible dilator in this embodiment differs from the first embodiment in that: the expansion module 1 further comprises a second expansion structure, the second expansion structure comprises two side expansion pieces 13, the two side expansion pieces 13 are respectively connected to two opposite sides of the lower expansion piece 12 in a rotating mode, in the process that the upper expansion piece 11 and the lower expansion piece 12 are opened oppositely, one ends of the two side expansion pieces 13 respectively slide along the upper expansion piece 11 in opposite directions, the other ends of the two side expansion pieces 13 are opened oppositely, an inspection channel is formed among the upper expansion piece 11, the lower expansion piece 12 and the two side expansion pieces 13, in the process that the upper expansion piece 11 and the lower expansion piece 12 are closed oppositely, one ends of the two side expansion pieces 13 respectively slide along the upper expansion piece 11 in opposite directions, the other ends of the two side expansion pieces 13 are closed oppositely, and the two side expansion pieces 13 are collected in a containing space formed after the upper expansion piece 11 and the lower expansion piece 12 are closed. When being in the state of opening, on expand piece 11, expand piece 12 and two sides and expand piece 13 cooperation and form four wings expansion structure down for the inspection passageway that forms is bigger, and the cross sectional shape that four wings expansion formed inspection passageway is more convenient for look the inspection in addition, thereby has promoted the convenience of inspection, and whole four wings expansion simple structure, and is with low costs, opens convenient operation, and the convenience when doctor uses is better. In addition, when the expansion module is in a basic closed state, the two side expansion pieces 13 are folded in the accommodating space formed by the upper expansion piece 11 and the lower expansion piece 12 after being closed, so that the volume of the expansion module 1 is small when the expansion module is folded, compared with the traditional two-wing structure, the whole volume of the expansion module 1 is unchanged, and the packing volume of the whole expansion module 1 is unchanged, so that the transportation is facilitated.

The side expanding piece 13 comprises a side expanding section 131, a rotating part 132 and a sliding part 133, the side expanding section 131 is connected with the sliding part 133, the sliding part 133 is connected with the upper expanding piece 11 in a sliding manner, one end of the rotating part 132 is connected with the joint of the side expanding section 131 and the sliding part 133, the other end of the rotating part 132 is connected with the lower expanding piece 12 in a rotating manner, in the relative opening process of the upper expanding piece 11 and the lower expanding piece 12, the two sliding parts 133 slide oppositely along the upper expanding piece 11, the two side expanding sections 131 are relatively opened, an inspection channel is formed among the upper expanding piece 11, the lower expanding piece 12 and the two side expanding sections 131, in the relative closing process of the upper expanding piece 11 and the lower expanding piece 12, the two sliding parts 133 slide oppositely along the upper expanding piece 11, the two side expanding sections 131 are relatively closed, and the two side expanding sections 131 are collected in a containing space formed after the upper expanding piece 11 and the lower expanding piece 12 are closed. In this embodiment, the inspection channel is formed by the cooperation of the upper expanding section 111, the lower expanding section 121 and the two side expanding sections 131. Realize the expansion of four wings through last expansion section 111, lower expansion section 121 and two side expansion sections 131, obtain the inspection passageway of the inspection of being more convenient for, and the side that the cooperation of side expansion section 131, rotation portion 132 and sliding part 133 formed expands simple structure, and the expansion module 1 overall cost that uses as the consumptive material is lower. Specifically, the sliding portion 133 is integrally formed with the side expansion section 131. The one side that two side expansion sections 131 carried on the back mutually is smooth cambered surface, and the one end that sliding part 133 was kept away from to side expansion section 131 is ARC structure, so can avoid side expansion section 131 to open the damage to the vagina when the cooperation forms inspection passageway.

The rotating part 132 includes a rotating shaft 1321 and an elastic catch plate 1322. One end of the rotating shaft 1321 is connected to the connection point between the side expansion section 131 and the sliding portion 133, the elastic clamping plate 1322 is disposed at the other end of the rotating shaft 1321, the two opposite sides of the connection end 123 are respectively provided with a rotation through hole 12321, and the elastic clamping plate 1322 passes through the rotation through hole 12321, so that the rotation through hole 12321 is sleeved outside the rotating shaft 1321 and is rotatably connected with the rotating shaft 1321. Specifically, two rotation through holes 12321 are respectively opened in two mounting plates 1232, elastic clamping plate 1322 is integrally connected with rotation shaft 1321 along the axis direction of rotation shaft 1321, barb structure 13221 is provided on elastic clamping plate 1322, during assembly, rotation shaft 1321 integrally connected with elastic clamping plate 1322 directly passes through rotation through hole 12321, elastic clamping plate 1322 passes through the in-process of rotation through hole 12321, the inner wall of rotation through hole 12321 can act on barb structure 13221, make elastic clamping plate 1322 deform towards the axis direction of rotation shaft 1321, and after elastic clamping plate 1322 passes through rotation through hole 12321, elastic clamping plate 1322 can reset towards the outside of rotation shaft 1321, barb structure 13221 can back-off in rotation through hole 12321 at this moment, form spacing to rotation shaft 1321, make rotation shaft 1321 rotate and connect in rotation through hole 12321. One end of the sliding part 133, which is far away from the side expanding section 131, extends toward the inspection hole 1121 and forms a sliding connection with the side of the pressing part 113, the side of the pressing part 113 is the side when the pressing part 113 cooperates with the transition plate 1123 and the two side plates 1124 to form the inspection hole 1121, when a force is applied to the pressing part 113, the pressing part 113 simultaneously acts on the two sliding parts 133 in the process of opening the upper expanding section 111 and the lower expanding section 121 relatively, slides on the side of the pressing part 113 relatively, so as to drive the two side expanding sections 131 to open relatively, and cooperates with the upper expanding section 111 and the lower expanding section 121 to form an inspection channel, when the upper expanding section 111 and the lower expanding section 121 close relatively, the two sliding parts 133 slide back on the side wall of the pressing part 113, the two side expanding sections 131 close relatively, and the two side expanding sections 131 close first, so as to form a substantially closed state, and then the upper expanding section 111 and the lower expanding section 121 complete a closing action, and forms a substantially closed state, so that the two side expansion segments 131 can be folded in the accommodating space formed after the upper expansion segment 111 and the lower expansion segment 121 are closed.

Preferably, the sliding part 133 has a limiting arc-shaped end 1331, and the limiting arc-shaped end 1331 is in sliding contact with the upper expansion piece 11. The limiting arc-shaped end 1331 is an end part of the sliding part 133 with an arc-shaped structure, and through the arrangement of the limiting arc-shaped end 1331, the sliding part 133 is more adaptive to the side edge of the pressing part 113 of the upper expanding part 11 to form a sliding connection matching relationship, so that the smoothness of sliding matching is ensured. In a specific application, the limiting arc-shaped end 1331 is formed by bending and extending the end of the sliding part 133 in an arc shape toward the inspection hole 1121, and is in sliding contact with the pressing part 113 in a manner of fitting to the end.

Preferably, the side expanding member 13 further includes a reinforcing portion provided at the side expanding section 131 or/and the sliding portion 133. Through the arrangement of the reinforcing part, the strength of the side expanding section 131 and the sliding part 133 is reinforced to ensure the strength when the side expanding section 131 performs the expanding action and the sliding part 133 performs the sliding action, and the strength of the side expanding section 131 and the sliding part 133 after the inspection channel is formed is also ensured, so that the stability of the inspection channel is improved. In a specific application, the reinforcing portion may be a reinforcing rib or a reinforcing block, for example, an i-shaped reinforcing block, and when the reinforcing portion is provided, the reinforcing portion may be provided on the side expanding section 131 or the sliding portion 133 alone, or may be provided on each of the side expanding section 131 and the sliding portion 133. The reinforcing portion in this embodiment is a rib provided along the longitudinal direction of the sliding portion 133 and the side expanding section 131, and is preferably integrally formed with the sliding portion 133 and the side expanding section 131.

Reference is again made to fig. 1, 2, 3, 4, 6, 7 and 11. Furthermore, the upper expanding piece 11 is provided with two limiting parts 114, the two limiting parts 114 are oppositely arranged, in the process that the upper expanding piece 11 and the lower expanding piece 12 are opened or closed relatively, the two side expanding pieces 13 synchronously slide towards or away from each other along the two limiting parts 114, and the two side expanding pieces 13 synchronously open or close relatively. The two limiting parts 114 on the upper expanding piece 11 act on the two side expanding pieces 13 respectively, so that the opening or closing of the side expanding pieces 13 is realized, the expansion linkage between the upper expanding piece 11 and the side expanding pieces 13 is realized by a simple structure, and the structure is simple and the stability is high. Specifically, the two limiting portions 114 are disposed along the side of the pressing portion 113, the side of the pressing portion 113 is the side when the pressing portion 113 is matched with the transition plate 1123 and the two side plates 1124 to form the inspection opening 1121, the two limiting portions 114 are disposed on the side of the pressing portion 113 facing the connecting plate 1231, one end of each of the two limiting portions 114 is close to the inner wall of the corresponding side plate 1124, and the other ends of the two limiting portions 114 extend in opposite directions. Preferably, one ends of the two position-limiting portions 114 are integrally connected to the inner walls of the two side plates 1124, respectively, and the other ends of the two position-limiting portions 114 extend toward each other and face each other. The limiting arc ends 1331 of the two sliding portions 133 are in sliding contact with the two limiting portions 114 respectively. When a force is applied to the pressing portion 113, in the process of driving the upper expansion section 111 and the lower expansion section 121 to open relatively, the pressing portion 113 acts on the limiting arc ends 1331 of the two sliding portions 133 through the two limiting portions 114 synchronously, so that the two sliding portions 133 slide on the two limiting portions 114 respectively in the opposite directions, and thus the two side expansion sections 131 are driven to open relatively, whereas, in the process of closing the upper expansion section 111 and the lower expansion section 121 relatively, the limiting arc ends 1331 of the two sliding portions 133 slide on the two limiting portions 114 respectively in the opposite directions, and the two side expansion sections 131 are closed relatively. The limiting portion 114 in this embodiment may be a sliding block.

Preferably, a clearance 1143 is formed between the two stoppers 114, and one end of the accommodating portion 1221 having the closed visible portion 12211 passes through the clearance 1143. Through the setting of the avoidance position 1143, the end of the accommodating part 1221 having the closed visible position 12211 is avoided, so that the structure of the expansion module 1 is more compact. Preferably, the height of the bearing position 12213 is greater than the height of the limiting part 114, so that the bearing position 12213 at a higher position bears other medical instruments, and the other medical instruments cannot interfere with the limiting part 114 at a lower position, thereby avoiding position and operation interference between the other medical instruments and the expansion module 1, and ensuring smooth use of the visual expander. The avoidance space 1143 in this embodiment is specifically a space between the two limiting portions 114.

Preferably, the stopper 114 is inclined from the outside of the inspection passage to the inside of the inspection passage. In the present embodiment, the stopper 114 is inclined from the outer side of the inspection hole 1121 toward the inner side of the inspection hole 1121. Thus, by the inclined arrangement of the limiting portions 114 from outside to inside, when the pressing portion 113 applies a force, the upper expanding section 111 and the lower expanding section 121 are driven to open relatively, so that the sliding motion of the limiting arc ends 1331 of the two sliding portions 133 synchronously acted by the two limiting portions 114 is smoother. In a specific application, the specific inclination angle of the limiting portion 114 may be set according to actual conditions, and the inclination angle of the limiting portion 114 from the outer side of the inspection hole 1121 to the inner side of the inspection hole 1121 is within 5 degrees.

Preferably, the position-limiting portion 114 has a first surface 1141 and a second surface 1142, the first surface 1141 intersects the second surface 1142, the second surface 1142 has a first end 11421 and a second end 11422, and the second surface 1142 gradually converges toward the first surface 1141 when the second surface 1142 extends from the first end 11421 to the second end 11422. The first surface 1141 in this embodiment is a surface of the limiting portion 114 intersecting with a lateral edge of a surface of the pressing portion 113, wherein the surface of the pressing portion 113 is a surface of the pressing portion 113 facing away from the downward-extending part 12, the second surface 1142 is a surface of the limiting portion 114 intersecting with the first surface 1141, and the second surface 1142 extends approximately along a length direction of the limiting portion 114. The second surface 1142 is slidably connected to the limiting arc-shaped end 1331 of the sliding part 133. In this embodiment, the first end 11421 is an end of the second surface 1142 close to the integral connection between the position-limiting portion 114 and the side plate 1124, and the second end 11422 is another end of the second surface 1142 away from the integral connection between the position-limiting portion 114 and the side plate 1124. It can be understood that when a force is applied to the pressing portion 113, during the process of bringing the upper expansion section 111 and the lower expansion section 121 to open relatively, the second face 1142 of the position-limiting portion 114 is in sliding contact with the position-limiting arc-shaped end 1331 of the sliding portion 133, and the second face 1142 continuously acts on the position-limiting arc-shaped end 1331 of the sliding portion 133, so that the two side expansion sections 131 open relatively to form the examination channel, and during the formation of the examination channel, the vagina is not spontaneously contracted, and acts on the upper expansion section 111, the lower expansion section 121, and the two side expansion sections 131 in the opposite direction, which causes the side expansion sections 131 to act on the two position-limiting arc-shaped ends 1331 in the opposite direction, so that the two position-limiting arc-shaped ends 1331 have a tendency to slide in the opposite direction, and in the actual use, the tendency to counteract the pressing portion 113 by applying a force against the hand, and during the process of defining the second face 1142 extending from the first end 11421 to the second end 11422, after the second face 1142 gradually draws close towards the first face 1141, the action degree of the second face 1142 to the limit arc-shaped end 1331 gradually increases, thereby limiting the reverse sliding trend of the limit arc-shaped end 1331, and along with the process that the second face 1142 gradually draws close towards the first face 1141, the limit angle of the second face 1142 to the limit arc-shaped end 1331 gradually increases, the limit to the reverse sliding trend of the limit arc-shaped end 1331 becomes stronger and stronger, thus, not only the opening process of the two side expansion sections 131 is smooth, but also the limit degree of the limit section 114 to the limit arc-shaped end 1331 is gradually enhanced, so as to resist the reverse action of vaginal contraction, thereby avoiding the reverse sliding of the limit arc-shaped end 1331, ensuring the opening process smoothness of the upper expansion section 111, the lower expansion section 121 and the two side expansion sections 131, and smoothly forming the inspection channel.

Preferably, the upper expanding section 111 and the lower expanding section 121 are in a substantially closed state, the cross sections of the two sections are located on the same substantially circular circumference, and the diameter of the substantially circular shape is gradually increased from the direction away from the inspection hole 1121 to the direction close to the inspection hole 1121. It can be understood that when the expansion module 1 in the substantially closed state enters the vagina, the vagina needs to have a gradual receiving process, otherwise discomfort of a patient can be caused, and by defining the direction from the position far away from the examination opening 1121 to the position close to the examination opening 1121, the diameter of the substantially circular shape is gradually increased, so that when a doctor uses the expansion module 1 to enter the vagina, the doctor firstly enters the end, with the smaller diameter, of the substantially circular shape formed by matching the upper expansion section 111 and the lower expansion section 121, and then gradually increases the diameter of the substantially circular shape, discomfort of the patient can be reduced, and the discomfort of the patient can be more smooth. The substantially circular shape in this embodiment may be a perfect circle, an ellipse with an approximate circle, or another substantially circular shape, and the substantially closed state may be a perfect closing of the upper expanding section 111 and the lower expanding section 121, a gap may exist between the upper expanding section 111 and the lower expanding section 121, or another substantially closed state of the upper expanding section 111 and the lower expanding section 121.

Preferably, when the upper flaring piece 11, the lower flaring piece 12 and the two side flaring pieces 13 are in the flaring state, the cross sections of the upper flaring piece, the lower flaring piece and the two side flaring pieces are positioned on the same circumference of a basic circle, and the diameter of the basic circle is gradually reduced from the direction far away from the microscopic end to the direction close to the microscopic end. In the embodiment, when the upper flaring piece 11, the lower flaring piece 12 and the two side flaring pieces 13 are in the open state, namely, the upper expanding section 111, the lower expanding section 121 and the two side expanding sections 131 are in the expanded state, the cross section of the inspection channel is located on the circumference of the same basic circle, the cross section of the inspection channel is approximately located on the circumference of the same basic circle, the diameter of the basic circle is gradually reduced from the direction far away from the microscopic end to the direction close to the microscopic end, namely from the direction far away from the inspection opening 1121 to the direction close to the inspection opening 1121, namely, the cross section of the inspection channel at the vaginal opening is smaller, and the section of the examination channel is gradually increased along with the extension towards the deep part of the vagina, so that the examination space inside the vagina is enlarged, so can be convenient for the doctor to carry out all-round inspection to vagina inside, avoid the inspection to omit, strengthened the accuracy of inspection. In addition, the end with the larger cross section of the examination channel formed by the upper dilating segment 111, the lower dilating segment 121 and the two side dilating segments 131 is positioned in the deep vagina, and the end with the smaller cross section of the examination channel formed by the upper dilating segment, the lower dilating segment and the two side dilating segments 131 is positioned at the vaginal opening, so that the dilating module 1 is prevented from being pulled out in the detection process.

Preferably, the opening direction between the upper flaring piece 11 and the lower flaring piece 12 is substantially orthogonal to the opening direction between the two side expansion segments 131. In this embodiment, the opening direction between the upper expanding section 111 and the lower expanding section 121 is substantially orthogonal to the opening direction between the two side expanding sections 131. It can be understood that, when the upper dilating segment 111, the lower dilating segment 121 and the two side dilating segments 131 are in the flaring shape, an examination channel is formed, and the cross sections of the four segments are located on the same substantially circular circumference, when the opening direction between the upper dilating segment 111 and the lower dilating segment 121 and the opening direction between the two side dilating segments 131 are in a substantially orthogonal relationship, the opening locus between the upper dilating segment 111 and the lower dilating segment 121 and the opening locus between the two side dilating segments 131 are perpendicular to each other, the cross sections of the four segments are located on four bisectors of the same substantially circular circumference, and the interval between two bisectors is approximately the same, so that the dilating action of the four segments on the inside of the vagina is the same, and the reverse action of the vagina on the four segments is also balanced, and at this time, when the four segments are designed into a smaller-width long segment shape, the dilation on the vagina can still be ensured, and the examination channel can be maintained, not only can reduce the cost, more can reduce the area of contact of four with the vagina inner wall for the more position of vagina inner wall can be by direct observation, thereby has promoted the efficiency and the accuracy of vagina inner wall inspection. The interval between two adjacent bisectors is approximately the same in this embodiment, which means that the interval between two adjacent bisectors is completely the same, or there is a slight error in the interval between two adjacent bisectors, but the influence is considered to be the same.

To sum up, carry out an organic whole through the portion of holding and hold to visual module to through the setting of sealing visual position, seal the protection to the visual end of visual module under the condition that does not influence visual function, avoided visual module directly to expose in the inspection passageway, make visual module can reuse, and avoided the infection to the vagina, thereby avoided visual module to use as the consumptive material, resource utilization is high, and is with low costs.

The above is merely an embodiment of the present invention, and is not intended to limit the present invention. Various modifications and alterations to this invention will become apparent to those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the scope of the claims of the present invention.

Claims

1. A visual dilator, comprising:

the expansion module (1) comprises a first expansion structure, the first expansion structure comprises an upper expansion piece (11) and a lower expansion piece (12), the upper expansion piece (11) is connected with the lower expansion piece (12) and can rotate relatively, the upper expansion piece and the lower expansion piece are switched between an open state and a basically closed state in the relative rotation process, when the upper expansion piece and the lower expansion piece are in the open state, an inspection channel is formed between the upper expansion piece and the lower expansion piece, the lower expansion piece (12) is provided with a containing part (1221), the containing part (1221) is integrally formed on a holding part (122) of the lower expansion piece (12), one end of the containing part (1221) is provided with a closed visual position (12211), and the closed visual position (12211) extends into the inspection channel; and

the visual module (2) is accommodated in the accommodating part (1221), and the visual end of the visual module (2) is attached to the closed visual position (12211);

the lower expanding piece (12) is provided with a joint limiting position (1223), the visual module (2) further comprises an elastic joint piece (26), the elastic joint piece (26) is arranged at one end, away from the inspection channel, of the shell (21), and when the shell (21) is arranged in the accommodating part (1221), the elastic joint piece (26) is clamped at the joint limiting position (1223), so that the visual piece (24) on the shell (21) is tightly jointed with the closed visual position (12211); the elastic fitting piece (26) comprises a fitting frame body (261), a fitting elastic part (262), a fitting limiting part (263) and an ejecting part (264), the attaching frame body (261) is arranged on the shell (21) of the visual module (2), one end of the attaching elastic part (262) is connected to the attaching frame body (261), the attaching limiting part (263) is movably connected with the attaching frame body (261), and is connected with the other end of the joint elastic part (262), the joint limiting part (263) is provided with a limiting end (2631) which acts on the joint limiting part (263) to lead the joint elastic part (262) to deform, when the shell (21) is arranged in the accommodating part (1221), the attaching limiting part (263) is loosened, the joint elastic part (262) resets and acts on the joint limiting part (263), so that the limiting end (2631) is clamped on the attaching limiting position (1223); the ejecting part (264) comprises an ejecting frame (2641) and an ejector (2642), the attaching frame body (261) is movably arranged on the ejecting frame (2641), one end of the ejector (2642) is connected with the ejecting frame (2641), the other end of the ejector is connected with the attaching frame body (261), and when the limiting end (2631) is separated from the attaching limiting position (1223), the ejector (2642) acts on the attaching frame body (261) and drives the shell (21) to eject from the accommodating part (1221); spacing portion of laminating (263) is located laminating support body (261), and its one end carries out the L type and buckles and passes laminating support body (261) and form spacing end (2631), spacing end (2631) and laminating support body (261) sliding connection to can carry out spacingly to the activity direction of the spacing portion of laminating (263), the other end of the spacing portion of laminating (263) passes behind casing (21) and carries out the L type and buckles and form effect end (2632), casing (21) reserve the breach of dodging that has effect end (2632) to remove.

2. A visual expander according to claim 1, wherein said visual module (2) comprises a housing (21), a light source element (22) and a control element (23), said housing (21) being provided in said housing (1221), said light source element (22) being provided in said housing (21) and facing said closed visual position (12211), said control element (23) being provided in said housing (21) and being connected to said light source element (22).

3. A visual dilator according to claim 2, characterised in that said visual module (2) further comprises a visual element (24), said visual element (24) being provided in said housing (21) and abutting against said closed visual position (12211), said visual element (24) being connected to said control element (23).

4. A visual dilator according to claim 3, characterised in that said light source element (22) is annularly arranged to said visual element (24).

5. A visual expander according to claim 3, wherein said visual module (2) further comprises a power supply element (25), said power supply element (25) being arranged inside said casing (21) and being connected to said light source element (22), said control element (23) and said visual element (24), respectively.

6. The visual dilator according to claim 1, wherein said lower dilating element (12) comprises a lower dilating segment (121) and a gripping portion (122), said gripping portion (122) has a connecting end (123), said connecting end (123) is connected to said lower dilating segment (121), said upper dilating element (11) is connected to said connecting end (123) and can rotate relatively, when in an open state, an inspection passage is formed between said upper dilating element (11) and said lower dilating segment (121), one end of said containing portion (1221) is communicated to the inside of said gripping portion (122), and the other end of said containing portion (1221) extends into said connecting end (123) and faces said inspection passage.

7. A visual expander according to any one of claims 1-6, wherein the expanding die set (1) further comprises a second expanding structure, the second expanding structure comprises two side expanding pieces (13), the two side expanding pieces (13) are respectively rotatably connected to two opposite sides of the lower expanding piece (12), during the relative opening of the upper expanding piece (11) and the lower expanding piece (12), one ends of the two side expanding pieces (13) respectively slide along the upper expanding piece (11) in opposite directions, the other ends of the two side expanding pieces (13) are respectively opened in opposite directions, an inspection channel is formed among the upper expanding piece (11), the lower expanding piece (12) and the two side expanding pieces (13), during the relative closing of the upper expanding piece (11) and the lower expanding piece (12), one ends of the two side expanding pieces (13) respectively slide along the upper expanding piece (11) in opposite directions, the other ends of the two side expanding pieces (13) are closed oppositely, and the two side expanding pieces (13) are gathered in an accommodating space formed after the upper expanding piece (11) and the lower expanding piece (12) are closed.

8. The visual expander according to any one of claims 1 to 6, wherein the expanding module (1) further comprises a locking member (14), the locking member (14) comprises a first locking portion (141) and a second locking portion (142), the first locking portion (141) and the second locking portion (142) are respectively disposed on the upper expanding member (11) and the lower expanding member (12), the first locking portion (141) and the second locking portion (142) are detachably connected, when the first locking portion (141) and the second locking portion (142) are connected, the upper expanding member (11) and the lower expanding member (12) are in a locking state and act on the upper expanding member (11), and a connection position of the first locking portion (141) and the second locking portion (142) is changed, so that an angle between the upper expanding member (11) and the lower expanding member (12) is changed, and the first locking part (141) is separated from the second locking part (142) when acting on the second locking part (142), and the upper expanding piece (11) and the lower expanding piece (12) are in an unlocking state.