Rotary limiting device of hysteroscope

Abstract

The utility model discloses a rotation limiting device of a hysteroscope. The rotation limiting device comprises an operation knob used for rotation, a water pipe plug capable of rotating along with the operation knob and a water pipe seat. The operation knob is connected with the water pipe plug, the water pipe plug is connected with the water pipe base, a first limiting block is arranged on the operation knob, a second limiting block is arranged at one end of the water pipe plug, a third limiting block is arranged at the other end of the water pipe plug, and a fourth limiting piece is arranged on the water pipe base. In the first state, the first limiting block rotates relative to the second limiting block; in the second state, the first limiting block abuts against the second limiting block, and the first limiting block drives the water pipe plug to rotate; in the third state, the third limiting block abuts against the fourth limiting piece, and the third limiting block drives the fourth limiting piece to slide. According to the utility model, rotation of more than 360 degrees can be realized, so that the visual angle range of the connected lens is wider.

Description

Technical Field

[0001] The utility model relates to the field of hysteroscopes, in particular to a rotation limiting device for hysteroscopes. Background Art

[0002] Hysteroscopy is used for intrauterine examination and treatment. During use, the hysteroscope's lens allows for magnified observation of the uterine cavity. Surgical instruments can be passed through the hysteroscope to perform surgical procedures. From an examination perspective, hysteroscopy is the preferred diagnostic tool for gynecological bleeding disorders and intrauterine pathologies.

[0003] Hysteroscopy systems used clinically often utilize rigid hysteroscopes, whose primary components are the sheath and speculum. Depending on the angle of the tip of the hysteroscope, it can be categorized into 0-degree, 12-degree, 20-degree, 30-degree, and 45-degree angles, with a 30-degree angle commonly used clinically. However, blind spots can occur during examinations, making it difficult to observe or reach the lesion. This can lead to missed diagnoses, misdiagnoses, and even surgical complications such as uterine perforation. Utility Model Content

[0004] In view of the deficiencies of the prior art, the present invention provides a rotation limiting device for a disposable hysteroscope, which can achieve a rotation of more than 360 degrees, so that the viewing angle range of the connected lens is wider.

[0005] The utility model is achieved through the following technical solutions:

[0006] A rotation limiting device for a hysteroscope, comprising an operating knob for rotation, a water pipe plug that can rotate along with the operating knob, and a water pipe seat;

[0007] The operating knob is connected to the water pipe plug, which is connected to the water pipe seat. A first limit block is provided on the operating knob, a second limit block is provided at one end of the water pipe plug and a third limit block is provided at the other end, and a fourth limit piece is provided on the water pipe seat. Turn the operating knob. In the first state, the first limit block rotates relative to the second limit block. In the second state, the first limit block abuts against the second limit block, and the first limit block drives the water pipe plug to rotate. In the third state, the third limit block abuts against the fourth limit piece, and the third limit block drives the fourth limit piece to slide.

[0008] Furthermore, in the first state, the rotation angle of the first limit block is α, and in the second state, the first limit block abuts the second limit block, the water pipe plug and the operating knob are relatively stationary, the first limit block drives the water pipe plug to rotate, and the third limit block can rotate relative to the fourth limit block, and the rotation angle of the third limit block is β.

[0009] Furthermore, the sum of the rotation angle α of the first limiting block and the rotation angle β of the third limiting block is greater than 360 degrees.

[0010] Furthermore, in the third state, the third limit block abuts against the fourth limit piece, the third limit block and the fourth limit piece are relatively stationary, the third limit block drives the fourth limit piece to slide, the fourth limit piece can move relative to the water pipe seat, and the movement angle of the fourth limit piece is γ.

[0011] Furthermore, the sum of the rotation angle β of the third limiting block and the movement angle γ of the fourth limiting member is greater than 360 degrees.

[0012] Furthermore, the fourth limiting member is movably arranged on the first end surface of the water pipe seat.

[0013] Furthermore, a fourth limiting groove in the shape of an arc is formed on the first end surface, and the fourth limiting member is accommodated in the fourth limiting groove and slides along the fourth limiting groove.

[0014] Furthermore, two fixing blocks are connected to the first end surface, a limiting space is formed between the two fixing blocks, and the fourth limiting member swings in the limiting space.

[0015] Furthermore, a groove is provided on the second end face of the water pipe seat, and the fourth limiting member is a columnar structure with one end bent. The bent portion of the fourth limiting member can be rotatably accommodated in the groove and cooperate with the groove, and the other end of the fourth limiting member is accommodated in the limiting space and swings in the limiting space.

[0016] Compared with the prior art, the advantages of the present invention are:

[0017] 1. By using the first state and the second state in combination, the rotation angle α of the first limit block and the rotation angle β of the third limit block are superimposed to achieve a rotation greater than 360 degrees, thereby expanding the viewing angle and avoiding the generation of blind spots.

[0018] 2. By using the second state and the third state in combination, the rotation angle β of the third limit block and the rotation angle γ of the fourth limit member are superimposed to achieve a rotation greater than 360 degrees, thereby expanding the viewing angle and avoiding the generation of blind spots.

[0019] 2. By setting a rotation limit device on the hysteroscope itself, more than 360-degree observation can be achieved without changing the endoscope at different angles, which is safer and saves costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a three-dimensional assembly diagram of a rotation limiting device of a hysteroscope according to one embodiment of the utility model;

[0021] Figure 2 This is a right side view of a rotation limiting device for a hysteroscope according to one embodiment of the utility model;

[0022] Figure 3 for Figure 2 Cross-sectional view along AA;

[0023] Figure 4 This is an exploded view of a rotation limiting device of a hysteroscope according to the present invention;

[0024] Figure 5 This is another exploded view of a rotation limiting device for a hysteroscope according to the present invention;

[0025] Figure 6 This is a three-dimensional assembly diagram of a rotation limiting device for a hysteroscope according to the present invention;

[0026] Figure 7 This is another partial three-dimensional assembly diagram of a rotation limiting device of a hysteroscope according to the present invention;

[0027] Figure 8 This is another partial three-dimensional assembly diagram of a rotation limiting device for a hysteroscope according to one embodiment of the utility model;

[0028] Figure 9 The rotation angle superposition diagram of the first state and the second state;

[0029] Figure 10 The rotation angle superposition diagram for the second state and the third state;

[0030] Figure 11 This is an exploded view of a rotation limiting device for a hysteroscope according to another embodiment of the utility model;

[0031] Figure 12 This is a three-dimensional assembly diagram of a rotation limiting device for a hysteroscope according to another embodiment of the present utility model;

[0032] Figure 13 This is another partial three-dimensional assembly diagram of a rotation limiting device for a hysteroscope according to another embodiment of the present utility model;

[0033] Explanation of reference numbers: 11. Sealing valve body; 12. Operating knob; 122. First limiting block; 123. First limiting groove; 13. Pipe plug; 132. Second limiting block; 133. Second limiting groove; 134. Third limiting block; 135. Third limiting groove; 14. Pipe seat; 138. Fourth through hole; 142. Fourth limiting member; 143. Fourth limiting groove; 146. Fixing block; 147. Groove; 148. Bending portion; 149. First end face; 150. Second end face; 151. Limiting space; 155. Fifth through hole; 2. Insertion portion; 20. Insertion tube; 204. Lens; 21. Instrument channel tube; 4. Straight line. DETAILED DESCRIPTION

[0034] The following is a further non-restrictive detailed description of the technical solution of the utility model in conjunction with the preferred embodiments and the accompanying drawings. In the description of the utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" can explicitly or implicitly include at least one of the features. In the description of the utility model, the meaning of "multiple" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the utility model, and cannot be understood as limiting the utility model.

[0035] like Figures 1 to 3 As shown, a rotation limiting device for a hysteroscope according to one embodiment of the present invention includes a sealing valve body 11, an operating knob 12, a water pipe plug 13, and a water pipe seat 14, which are arranged in a handle 3. The front end of the operating knob 12 is accommodated in the sealing valve body 11 and connected to the sealing valve body 11; the sealing valve body 11 is accommodated in the fourth through hole 138 of the water pipe plug 13 and connected to the water pipe plug 13; and the front end of the water pipe plug 13 is accommodated in the fifth through hole 155 of the water pipe seat 14 and connected to the water pipe seat 14. The operating knob 11 is used to drive the water pipe plug 13 to rotate in the water pipe seat 14. The rotation limiting device also includes an insertion tube 20 and an instrument channel tube 21. One end of the insertion tube 20 is connected to the water pipe seat 14, and the other end is used to extend into the uterine cavity. One end of the instrument channel tube 21 is accommodated in the insertion tube 20, and the other end is accommodated in the water pipe plug 13 and connected to the water pipe plug 13.

[0036] like Figures 4 to 8As shown, the operating knob 12 is provided with a first limiting block 122 and a first limiting groove 123, and the rear end of the water pipe plug 13 is provided with a second limiting block 132 and a second limiting groove 133. The top of the first limiting block 122 abuts the bottom of the second limiting groove 133, and the first limiting block 122 can slide within the second limiting groove 133 until it abuts the second limiting block 132. The top of the second limiting block 132 abuts the bottom of the first limiting groove 123, and the second limiting block 132 can slide within the first limiting groove 123 until it abuts the first limiting block 122. The front end of the water pipe plug 13 is provided with a third limiting block 134 and a third limiting groove 135, and the rear end of the water pipe seat 14 is provided with a fourth limiting member 142. The top of the fourth limiting member 142 abuts against the bottom of the third limiting groove 135 , and the third limiting groove 135 can reciprocate along the axis of the water pipe plug 13 until the fourth limiting member 142 abuts against the third limiting block 134 .

[0037] like Figure 5 and Figure 8 As shown, a fourth limiting groove 143 is formed on the first end surface 149 of the water pipe seat 14 , wherein the fourth limiting member 142 is slidably received in the fourth limiting groove 143 and reciprocates in the fourth limiting groove 143 .

[0038] In the first state, the top of the first limit block 122 abuts the bottom of the second limit slot 133, allowing the first limit block 122 to slide within the second limit slot 133. The rotation angle of the first limit block 122 is α, where α is greater than 180 degrees and less than 360 degrees. In the second state, the first limit block 122 abuts the second limit block 132, the operating knob 12 and the water pipe plug 13 remain relatively stationary, the operating knob 12 drives the water pipe plug 13 to rotate, and the third limit block 134 rotates relative to the fourth limit member 142. The rotation angle of the third limit block 134 is β, where β is greater than 180 degrees and less than 360 degrees. In the third state, the third limit block 134 abuts the fourth limit member 142, driving the fourth limit member 142 to slide. The movement angle of the fourth limit member 142 is γ, where γ is greater than 180 degrees and less than 360 degrees.

[0039] like Figure 9 and Figure 10 As shown, when the first state and the second state are superimposed, the sum of the rotation angle α of the first limit block and the rotation angle β of the third limit block is greater than 360 degrees; when the second state and the third state are superimposed, the sum of the rotation angle β of the third limit block and the rotation angle γ of the fourth limit block is greater than 360 degrees.

[0040] During operation, the doctor rotates the operating knob 12. When the first limit block 122 on the operating knob 12 abuts against the second limit block 132 provided at the rear end of the water pipe plug 13, the limiting function is completed. The operating knob 12 and the water pipe plug 13 rotate simultaneously, and the water pipe plug 13 drives the instrument channel tube 21 to rotate simultaneously. The instrument channel tube 21 drives the insertion tube 20 and the lens 204 fixed to the end of the insertion tube 20 extending into the uterine cavity to complete the rotation. When the water pipe plug 13 rotates to a certain angle, the third limit block 134 at the front end abuts against the fourth limit piece 142 at the rear end of the water pipe seat 14. At this time, the rotation in one direction stops, and the rotation in the opposite direction is carried out in the same way. The rotation between the operating knob 12 and the water pipe plug 13 has a rotation range, and the rotation between the water pipe plug 13 and the water pipe seat 14 has a rotation range. The sum of the two rotation ranges is greater than 360 degrees.

[0041] With the operating handle 12 and the water pipe plug 13 positioned and fixed, and the two parts unable to rotate, the doctor rotates the operating knob 12, which is equivalent to directly driving the water pipe plug 13 until the third stopper 134 at the front end of the water pipe plug 13 abuts the fourth stopper 142 at the rear end of the water pipe seat 14, and then drives the fourth stopper 142 to slide in the fourth stopper groove 143 of the water pipe seat 14 until the fourth stopper 142 abuts the other end of the fourth stopper groove 143. The rotation in this direction is completed, and the same principle is used for the reverse rotation. The total rotation angle is the angle of movement of the third stopper 134 of the water pipe plug 13 plus the angle of movement of the fourth stopper 142 of the water pipe seat 14 in the fourth stopper groove 143, which is greater than 360 degrees, so that the viewing angle of the front end of the insertion tube 20 can be expanded 360 degrees.

[0042] Another embodiment, such as Figures 11 to 13 As shown, the first end surface 149 of the water pipe seat 14 is sealedly connected to the two fixing blocks 146 via a seal, forming a limiting space 151 between the two fixing blocks 146. A groove 147 is defined on the side of the second end surface 150 of the water pipe seat 14. The fourth limiting member 142 is a columnar structure with one end bent. The bent portion 148 of the fourth limiting member 142 is rotatably received in the groove 147 and engages with the groove 147. The other end of the fourth limiting member 142 is received in the limiting space 151.

[0043] A rotation limit device of a hysteroscope according to one embodiment of the present invention is used in conjunction with the first state and the second state, and the rotation angle α of the first limit block 122 and the rotation angle β of the third limit block 134 are superimposed to achieve a rotation greater than 360 degrees. By using the second state and the third state in conjunction with the rotation angle β of the third limit block 134 and the rotation angle γ of the fourth limit member 142, a rotation greater than 360 degrees is achieved, so that the rotation angle of the front end lens 204 is greater than 360 degrees, the viewing angle range is expanded, infinite rotation is achieved, and the generation of blind spots in the field of view is avoided. By setting a rotation limit device in the hysteroscope itself to complete observation greater than 360 degrees, there is no need to replace the endoscope at different angles, which is safer and saves costs.

[0044] The above embodiments merely illustrate several implementations of the present invention. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the present invention. It should be noted that a person skilled in the art would be able to make numerous variations and improvements without departing from the concept of the present invention, all of which fall within the scope of protection of the present invention. Therefore, the scope of protection of the present invention shall be determined by the appended claims.

Claims

1. A rotation limiting device for a hysteroscope, comprising an operating knob (12) for rotation, a water pipe plug (13) that can rotate with the operating knob (12), and a water pipe seat (14); It is characterized by: The operating knob (12) is connected to the water pipe plug (13), and the water pipe plug (13) is connected to the water pipe seat (14). A first limiting block (122) is provided on the operating knob (12), a second limiting block (132) is provided at one end of the water pipe plug (13), and a third limiting block (134) is provided at the other end. A fourth limiting piece (142) is provided on the water pipe seat (14). When the operating knob (12) is rotated, in a first state, the first limiting block (122) rotates relative to the second limiting block (132). In a second state, the first limiting block (122) abuts against the second limiting block (132), and the first limiting block (122) drives the water pipe plug (13) to rotate. In a third state, the third limiting block (134) abuts against the fourth limiting piece (142), and the third limiting block (134) drives the fourth limiting piece (142) to slide.

2. The rotation limiting device of the hysteroscope according to claim 1, characterized in that: In a first state, the rotation angle of the first limit block (122) is α. In a second state, the first limit block (122) abuts against the second limit block (132), the water pipe plug (13) and the operating knob (12) are relatively stationary, the first limit block (122) drives the water pipe plug (13) to rotate, and the third limit block (134) can rotate relative to the fourth limit member (142). The rotation angle of the third limit block (134) is β.

3. The rotation limiting device of the hysteroscope according to claim 2, characterized in that: The sum of the rotation angle α of the first limiting block (122) and the rotation angle β of the third limiting block (134) is greater than 360 degrees.

4. The rotation limiting device of the hysteroscope according to claim 2, characterized in that: In the third state, the third limiting block (134) abuts against the fourth limiting member (142), the third limiting block (134) and the fourth limiting member (142) are relatively stationary, the third limiting block (134) drives the fourth limiting member (142) to slide, and the fourth limiting member (142) can move relative to the water pipe seat (14), and the movement angle of the fourth limiting member (142) is γ.

5. The rotation limiting device of the hysteroscope according to claim 4, characterized in that: The sum of the rotation angle β of the third limiting block (134) and the movement angle γ of the fourth limiting member (142) is greater than 360 degrees.

6. The rotation limiting device of the hysteroscope according to claim 5, characterized in that: The fourth position-limiting member (142) is movably arranged on the first end surface (149) of the water pipe seat (14).

7. The rotation limiting device of the hysteroscope according to claim 6, characterized in that: A fourth limiting groove (143) in the shape of an arc is provided on the first end surface (149), and the fourth limiting member (142) is accommodated in the fourth limiting groove (143) and slides along the fourth limiting groove (143).

8. The rotation limiting device of the hysteroscope according to claim 6, characterized in that: Two fixing blocks (146) are connected to the first end surface (149), a limiting space (151) is formed between the two fixing blocks (146), and the fourth limiting member (142) swings in the limiting space (151).

9. The rotation limiting device of the hysteroscope according to claim 8, characterized in that: The second end surface (150) of the water pipe seat (14) is provided with a groove (147); the fourth limiting member (142) is a columnar structure with one end bent; the bent portion (148) of the fourth limiting member (142) is rotatably accommodated in the groove (147) and cooperates with the groove (147); the other end of the fourth limiting member (142) is accommodated in the limiting space (151) and swings in the limiting space (151).

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