Expansion mechanism and expander

Abstract

The present invention discloses an expansion mechanism and an expander, comprising a carrier, a first expansion member and a second expansion member, wherein the first expansion member and the second expansion member are both rotatably connected to the carrier; wherein the second expansion member is connected to the first expansion member through a first linkage mechanism, and the first expansion member is driven to rotate to drive the second expansion member to rotate. The second expansion member in the expansion mechanism is connected to the first expansion member through the first linkage mechanism, and when the first expansion member is driven to flip, the second expansion member can be driven to flip synchronously, so that the opening angle is larger, and the field of vision is not blocked, so that the doctor can observe more conveniently.

Description

Technical Field

[0001] The present invention relates to the technical field of gynecological examination instruments, and in particular to an expansion mechanism and an expander. Background Art

[0002] Dilators are commonly used medical devices for examining gynecological diseases, and the most commonly used ones are duckbill-shaped vaginal dilators. This type of dilator includes a handle and upper and lower wings and other basic structures. The dilator can be opened by pressing the upper wing. Among them, the lower wing is integrated with the handle. In other words, the opening angle of the lower wing is fixed, so the position of the lower wing and the visual mechanism installed on the handle is relatively fixed, causing the visual mechanism's field of view to deviate to the direction of the lower wing, resulting in poor observation field of view, affecting observation, and causing discomfort to the patient if adjustment is required. Summary of the invention

[0003] In view of the deficiencies of the prior art, the present invention provides an expansion mechanism and an expander.

[0004] The present invention discloses an expansion mechanism, comprising a carrier, a first expansion member and a second expansion member, wherein the first expansion member and the second expansion member are both rotatably connected to the carrier; wherein the second expansion member is connected to the first expansion member through a first linkage mechanism, driving the first expansion member to rotate drives the second expansion member to rotate.

[0005] According to one embodiment of the present invention, the first linkage mechanism includes a first connecting rod member and a second connecting rod member, one end of the first connecting rod member is rotatably connected to the first expansion member, the other end of the first connecting rod member is rotatably connected to one end of the second connecting rod member, the other end of the second connecting rod member is rotatably connected to the second expansion member, and the rotation connection point between the first connecting rod member and the second connecting rod member is movably arranged on the supporting member.

[0006] According to one embodiment of the present invention, a first linkage stroke position is set on the carrier, and the rotation connection point of the first link member and the second link member is movably set in the first linkage stroke position, and the rotation connection point of the first link member and the second link member moves along the first linkage stroke position.

[0007] According to an embodiment of the present invention, the first linkage stroke position is a waist-shaped hole.

[0008] According to an embodiment of the present invention, there are two groups of first linkage mechanisms, and the two groups of first linkage mechanisms are symmetrically arranged.

[0009] According to one embodiment of the present invention, it also includes two side expanders, both of which are rotatably connected to the bearing member, and the two side expanders are respectively connected to the first expander through a second linkage mechanism, driving the first expander to rotate and drive the two side expanders to rotate.

[0010] According to one embodiment of the present invention, the second linkage mechanism includes a first pull rod member and a second pull rod member, one end of the first pull rod member is rotatably connected to the side expansion member on the same side, the other end of the first pull rod member is rotatably connected to one end of the second pull rod member, the first expansion transmission part of the first expansion member is movably provided on the other end of the second pull rod member, and the second pull rod member is movably provided on the supporting member.

[0011] According to one embodiment of the present invention, a guide groove is provided on the bearing member, a guide bar is provided on the second pull rod member, the guide bar is movably disposed in the guide groove, and the guide bar moves along the guide groove.

[0012] According to one embodiment of the present invention, a support bar is provided on the bearing member, and the support bar is used to support the second tie rod member.

[0013] The invention discloses a four-wing expander, which comprises a visual mechanism and the above-mentioned expansion mechanism.

[0014] Compared with the prior art, an expansion mechanism of the present invention has the following advantages:

[0015] The expansion mechanism and expander of the present invention, the second expansion member in the expansion mechanism is connected to the first expansion member through the first linkage mechanism, when the first expansion member is driven to flip, the second expansion member can be driven to flip synchronously, the opening angle is larger, and the field of vision is not blocked, which is convenient for doctors to observe. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The drawings described herein are used to provide a further understanding of the present application and constitute a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings:

[0017] Figure 1 It is a schematic diagram of the structure of the expansion mechanism in the closed state in the embodiment;

[0018] Figure 2 is a structural cross-sectional view of the expansion mechanism in the closed state in the embodiment;

[0019] Figure 3 The structure of the expansion mechanism in the embodiment in the open state is schematically shown. Figure 1 ;

[0020] Figure 4 The structure of the expansion mechanism in the embodiment in the open state is schematically shown. Figure 2 ;

[0021] Figure 5 is a schematic structural diagram of a bearing member in an embodiment;

[0022] Figure 6 is a schematic structural diagram of a first expansion member in an embodiment;

[0023] Figure 7 This is a schematic diagram of the installation of the first linkage mechanism in the embodiment;

[0024] Figure 8 is a schematic structural diagram of a second pull rod in the embodiment;

[0025] Fig. 9 for Figure 2 Enlarged view of area A in the middle;

[0026] Fig.10 for Figure 4 Enlarged view of area B in the middle.

[0027] Description of reference numerals:

[0028] 1. Carrying member; 11. Hand-held part; 111. Hand-held section; 112. Visible section; 1121. Visible area; 113. Mounting cavity; 114. Support bar; 12. Mounting part; 121. First linkage stroke position; 122. Rotating shaft; 123. Guide groove; 13. Stop position; 2. First expansion member; 21. First expansion part; 22. First expansion connecting part; 23. First expansion driving part; 24. First expansion transmission part; 3. Second expansion member; 31. Second expansion part ; 32. Second expansion connection portion; 4. Side expansion member; 41. Side expansion portion; 42. Side expansion connection portion; 5. First linkage mechanism; 51. First connecting rod member; 52. Second connecting rod member; 6. Second linkage mechanism; 61. First pull rod member; 62. Second pull rod member; 621. Guide strip; 622. Second linkage stroke position; 7. Locking mechanism; 71. Locking portion; 711. Locking tooth; 712. Locking drive portion; 72. Locking position; 721. Locking tooth; 8. Visual mechanism. DETAILED DESCRIPTION

[0029] The following will disclose multiple embodiments of the present invention with drawings. For the purpose of clear description, many practical details will be described together in the following description. However, it should be understood that these practical details should not be used to limit the present invention. That is, in some embodiments of the present invention, these practical details are not necessary. In addition, for the purpose of simplifying the drawings, some conventional structures and components will be depicted in a simple schematic manner in the drawings.

[0030] In addition, in the present invention, the descriptions of "first", "second", etc. are only used for descriptive purposes, and do not specifically refer to the order or sequence, nor are they used to limit the present invention. They are only used to distinguish components or operations described with the same technical terms, and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in the field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0031] As used herein, the term "substantially closed" and grammatically related terms refer to a relative structural arrangement of two objects where one object is perfectly positioned to be closed with the other object or where one object is positioned in a manner that is immediately recognizable as being closed with the other object, although not perfectly closed with the other object. A relative structural arrangement between two objects that is not perfectly closed but is immediately recognizable as closed due to acceptable tolerances suitable for manufacturing devices of the type described herein is considered to be substantially closed.

[0032] As used herein, the term "substantially circular" and grammatically related terms refer to a perfect circle or a shape that is not perfectly circular but is immediately recognizable as a circle. A cross-sectional shape that is not perfectly circular but is immediately recognizable as a circle due to acceptable tolerances suitable for manufacturing devices of the type described herein is considered to be substantially circular.

[0033] See also Figure 1-10 An expansion mechanism includes a carrier 1, a first expansion member 2 and a second expansion member 3. The first expansion member 2 and the second expansion member 3 are both rotatably connected to the carrier 1. Driving the first expansion member 2 to rotate drives the second expansion member 3 to rotate. The expansion operation can be completed in one step, achieving synchronous expansion, a larger opening angle, and a better field of view.

[0034] In this embodiment, the carrier 1 is a handle. Figure 5 The carrier 1 includes a hand-held portion 11 and two mounting portions 12 . The two mounting portions 12 are symmetrically arranged on the hand-held portion 11 . The first expansion member 2 and the second expansion member 3 are rotatably connected to the two mounting portions 12 .

[0035] Furthermore, the handheld portion 11 includes a handheld section 111 and a visible section 112, two mounting portions 12 are connected to the handheld section 111, and the two mounting portions 12 are located on both sides of the visible section 112. A visible area 1121 is provided on one end of the visible section 112 away from the handheld section 111, and the visible area 1121 faces the open channel to facilitate observation of the vagina.

[0036] Furthermore, the hand-held portion 11 is also provided with a mounting cavity 113 for placing the visual mechanism 8 , and the mounting cavity 113 penetrates the hand-held section 111 and the visual section 112 .

[0037] See also Figure 6 The first expansion member 2 includes a first expansion portion 21, a first expansion connection portion 22 and a first expansion drive portion 23. The number of the first expansion connection portions 22 is two. The two first expansion connection portions 22 connect the first expansion portion 21 and the first expansion drive portion 23. The two first expansion connection portions 22 are hinged to the two mounting portions 12 one by one. Pressing the first expansion drive portion 23 can drive the first expansion portion 21 to rotate. In addition, the first expansion member 2 also includes two first expansion transmission portions 24. The two first expansion transmission portions 24 are connected to the first expansion drive portion 23 and are used to drive the side expansion member 4.

[0038] The second expansion member 3 and the first expansion member 2 are arranged up and down, and the second expansion member 3 is connected to the first expansion member 2 through the first linkage mechanism 5, and driving the first expansion member 2 to rotate can drive the second expansion member 3 to rotate synchronously. Specifically, the second expansion member 3 includes a second expansion portion 31 and two second expansion connection portions 32, the two second expansion connection portions 32 are symmetrically arranged on the second expansion portion 31, the two second expansion connection portions 32 are hinged to the two mounting portions 12 one by one, and at least one second expansion connection portion 32 is connected to the adjacent first expansion connection portion 22 through the first linkage mechanism 5. Preferably, the number of the first linkage mechanism 5 is two groups, and the two groups of first linkage mechanisms 5 are symmetrically arranged, and the two second expansion connection portions 32 are connected to the two first expansion connection portions 22 through the two groups of first linkage mechanisms 5. The second expansion connection portion 32 is connected to the first expansion connection portion 22 on the same side through the first linkage mechanism 5, thereby improving the linkage stability of the first expansion member 2 and the second expansion member 3.

[0039] Further, see Figure 7 The first linkage mechanism 5 includes a first connecting rod member 51 and a second connecting rod member 52, one end of the first connecting rod member 51 is hinged on the first expansion connection portion 22, the other end of the first connecting rod member 51 is hinged to one end of the second connecting rod member 52, the other end of the second connecting rod member 52 is hinged to the second expansion connection portion 32, and the rotation connection point between the first connecting rod member 51 and the second connecting rod member 52 is movably arranged on the mounting portion 12.

[0040] Furthermore, the mounting portion 12 is provided with a first linkage stroke position 121, and the rotation connection point of the first link member 51 and the second link member 52 is movably arranged in the first linkage stroke position 121, and the rotation connection point of the first link member 51 and the second link member 52 moves along the first linkage stroke position 121. In this embodiment, the first linkage stroke position 121 is a waist-shaped hole.

[0041] The expansion mechanism also includes two side expansion members 4, both of which are rotatably connected to the handpiece 1, and the first expansion member 2 is driven to rotate to drive the two side expansion members 4 to rotate. The two side expansion members 4 are arranged on the left and right, and are located between the first expansion part 21 and the second expansion part 31. The side expansion members 4 are respectively connected to the first expansion member 2 through the second linkage mechanism 6, and driving the first expansion member 2 to rotate can drive the side expansion members 4 to rotate synchronously.

[0042] The two side expansion members 4 correspond to the two mounting portions 12 one by one, and the side expansion members 4 are rotatably connected to the corresponding mounting portions 12. Specifically, the side expansion member 4 includes a side expansion portion 41 and a side expansion connection portion 42, the side expansion connection portion 42 is connected to the side expansion portion 41, and the side expansion connection portion 42 is hinged to the mounting portion 12 on the same side, wherein the mounting portion 12 is respectively provided with a rotation shaft 122, and the side expansion connection portion 42 is rotatably sleeved with the rotation shaft 122 on the same side. At the same time, the side expansion connection portion 42 is connected to the first expansion connection portion 22 on the same side through the second linkage mechanism 6.

[0043] Furthermore, the second linkage mechanism 6 includes a first pull rod member 61 and a second pull rod member 62, one end of the first pull rod member 61 is rotatably connected to the side expansion connection part 42 on the same side, the other end of the first pull rod member 61 is rotatably connected to one end of the second pull rod member 62, the first expansion member is movably arranged on the other end of the second pull rod member 62, and the second pull rod member 62 is movably arranged on the supporting member 1.

[0044] Furthermore, a guide groove 123 is provided on the mounting portion 12 , and a guide bar 621 is provided on the second pull rod 62 . The guide bar 621 is movably disposed in the guide groove 123 , and the guide bar 621 moves along the guide groove 123 to guide the moving direction of the second pull rod 62 .

[0045] Furthermore, support bars 124 are respectively provided on the handle portion 11 facing the mounting portion 12 , and the support bars 124 are used to support the second pull rod member 62 .

[0046] Furthermore, a second linkage stroke position 622 is provided on one end of the second pull rod member 62 away from the first pull rod member 61, and the first expansion transmission part 24 is movably connected with the second linkage stroke position 622. Through the cooperation between the first expansion transmission part 24 and the second linkage stroke position 622, the first expansion member 2 drives the second pull rod member 62 to move.

[0047] Preferably, a limit position 13 is provided between the mounting portion 12 and the visible section 112, and one end of the second pull rod member 62 close to the first pull rod member 61 is movably inserted into the limit position 13, and one end of the second pull rod member 62 away from the first pull rod member 61 cannot pass through the limit position 13, thereby limiting the moving range of the second pull rod member 62 and also limiting the moving direction of the second pull rod member 62.

[0048] In specific application: install the visual mechanism 8 in the installation cavity 113, hold the handheld section 111 of the handheld part 11 and press the first expansion drive part 23, drive the first expansion part 21 to rotate upward through the transmission of the first expansion connection part 22, and the first expansion connection part 22 drives the first connecting rod 51 and the second connecting rod 52 to move, and then drives the second expansion connection part 32 to rotate downward, that is, drives the second expansion part 31 to rotate downward; at the same time, when pressing the first expansion drive part 23, the first expansion transmission part 24 is driven to move, so as to drive the first pull rod 61 and the second pull rod 62 to move, and then drives the side expansion connection part 42 to rotate outward, that is, drives the side expansion part 41 to rotate outward. At this time, the expander is in an open state, and an open channel is formed between the first expansion part 2, the second expansion part 3 and the two side expansion parts 4, and the visual mechanism 8 can observe the vagina through the open channel. On the contrary, the expander can be closed by releasing the first expansion drive part 23.

[0049] In addition, the expansion mechanism further comprises a locking mechanism 7 , through which the position of the first expansion member 2 is relatively fixed, and further the positions of the second expansion member 3 and the two side expansion members 4 are relatively fixed.

[0050] The locking structure includes a locking portion 71 and a locking position 72. One end of the locking portion 71 is arranged on the carrier 1, and the other end of the locking portion 71 is suspended and penetrates the locking position 72. The locking position 72 is arranged on the first expansion member 2, and the locking portion 71 and the locking position 72 are detachably connected.

[0051] Furthermore, a locking tooth 711 is provided on the locking portion 71, and a locking tooth 721 is provided on the locking position 72, and the locking tooth 711 is engaged with the locking tooth 721 to relatively fix the first expansion member 2. The locking portion 71 is arranged along the flipping path of the first expansion member 2, and the number of the locking teeth 711 is multiple, and the multiple locking teeth 711 are arranged along the locking portion 71 to achieve the fixation of multiple opening angles of the expander.

[0052] Furthermore, a locking driving part 712 is provided on one suspended end of the locking part 71 , and pushing the locking driving part 712 can bend the locking part 71 at a certain angle, so that the locking teeth 711 are separated from the locking teeth 721 , and the first expansion member 2 is in an active state.

[0053] A dilator includes a visual mechanism 8 and the above-mentioned dilating mechanism. The visual mechanism 8 is detachably arranged in the installation cavity 113. The visual module of the visual mechanism 8 is opposite to the visual area 1121. The visual mechanism 8 observes the vagina through the visual area 1121.

[0054] In summary, the second expander in the expansion mechanism is connected to the first expander through the first linkage mechanism. When the first expander is driven to flip, the second expander can be driven to flip synchronously, with a larger opening angle and without blocking the field of view, making it easier for doctors to observe.

[0055] The above description is only an embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent substitution, 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. An expansion mechanism, characterized in that: The invention comprises a hand piece (1), a first expansion piece (2) and a second expansion piece (3), wherein the first expansion piece (2) and the second expansion piece (3) are both rotatably connected to the hand piece (1); wherein the second expansion piece (3) is connected to the first expansion piece (2) via a first linkage mechanism (5), and the first expansion piece (2) is driven to rotate, thereby driving the second expansion piece (3) to rotate; It also comprises two side expansion members (4), both of which are rotatably connected to the handpiece (1), and the two side expansion members (4) are respectively connected to the first expansion member (2) via a second linkage mechanism (6), so that the first expansion member (2) is driven to rotate, thereby driving the two side expansion members (4) to rotate; The first linkage mechanism (5) comprises a first link member (51) and a second link member (52), one end of the first link member (51) is rotatably connected to the first expansion member (2), the other end of the first link member (51) is rotatably connected to one end of the second link member (52), the other end of the second link member (52) is rotatably connected to the second expansion member (3), and the rotation connection point between the first link member (51) and the second link member (52) is movably arranged on the handheld member (1); the number of the first linkage mechanism (5) is two groups, and the two groups of the first linkage mechanisms (5) are symmetrically arranged; The second linkage mechanism (6) includes a first pull rod (61) and a second pull rod (62), one end of the first pull rod (61) is rotatably connected to the side expansion member (4) on the same side, the other end of the first pull rod (61) is rotatably connected to one end of the second pull rod (62), the first expansion transmission part (24) of the first expansion member (2) is movably arranged on the other end of the second pull rod (62), and the second pull rod (62) is movably arranged on the handpiece (1).

2. The expansion mechanism according to claim 1, characterized in that: A first linkage stroke position (121) is provided on the hand piece (1), a rotational connection point between the first link member (51) and the second link member (52) is movably arranged in the first linkage stroke position (121), and the rotational connection point between the first link member (51) and the second link member (52) moves along the first linkage stroke position (121).

3. The expansion mechanism according to claim 2, characterized in that: The first linkage stroke position (121) is a waist-shaped hole.

4. The expansion mechanism according to claim 1, characterized in that: The hand piece (1) is provided with a guide groove (123), and the second pull rod (62) is provided with a guide bar (621). The guide bar (621) is movably arranged in the guide groove (123), and the guide bar (621) moves along the guide groove (123).

5. The expansion mechanism according to claim 1, characterized in that: The handheld component (1) is provided with a support bar (124), and the support bar (124) is used to support the second pull rod component (62).

6. A dilator, characterized in that: It comprises a visual mechanism (8) and an expansion mechanism as claimed in any one of claims 1 to 5.

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