Ureter guiding sheath

Abstract

The utility model provides a ureter guiding sheath which comprises an expansion seat, a sheath seat, an expansion tube and a sheath tube, one end of the expansion tube is connected with the expansion seat, one end of the sheath tube is connected with the sheath seat, the expansion tube extends into the sheath tube from one side of the sheath seat, and the sheath seat is detachably connected with the expansion seat; comprising self-locking heads, each self-locking head comprises a hook head and a hook seat, and a sheath seat is connected with an expansion seat through the self-locking heads; the self-locking head further comprises an elastic plate and a warped plate, the warped plate is perpendicularly arranged at one end of the elastic plate, and a hook head is arranged at one end of the warped plate. The self-locking heads are arranged in pairs and are axially symmetrical about the sheath seat and the expansion seat, one end, far away from the warping plate, of the elastic plate is connected with the expansion seat, the plate surface of the elastic plate is axially perpendicular to the expansion seat, and the warping plate is axially parallel to the expansion seat; the hook seat is arranged on the sheath seat; the problems that an expansion base and a sheath base are not tightly matched and are prone to falling off in the operation process, or the expansion base is difficult to take down are solved.

Description

Technical Field

[0001] The utility model relates to the technical field of ureteral catheters, in particular to a ureteral guide sheath. Background Art

[0002] Ureteral guide sheath is used in urological endoscopic examination and surgery to assist endoscopes and surgical instruments in entering the urinary tract, which can improve the success rate of endoscope insertion in patients with ureteral stenosis and narrow lumen. It can protect the ureter during repeated instrument exchange, reduce trauma to it, and protect precision instruments and soft endoscopes from damage.

[0003] There are many varieties of ureteral guide sheath products, but there are still some problems in clinical use. The ureteral guide sheath is composed of an expansion seat, a sheath seat, an expansion tube and a sheath tube. At present, there are problems such as the expansion seat and the sheath seat are not tightly matched, and it is easy to fall off during operation, or the expansion seat is difficult to remove. Utility Model Content

[0004] The utility model aims to provide a ureteral guide sheath, which solves the problems that the expansion seat and the sheath seat are not tightly matched, and are easy to fall off during operation, or the expansion seat is difficult to remove.

[0005] The embodiment of the utility model is realized by the following technical scheme: a ureteral guide sheath, comprising an expansion seat, a sheath seat, an expansion tube and a sheath tube, one end of the expansion tube is connected to the expansion seat, one end of the sheath tube is connected to the sheath seat, the expansion tube extends from one side of the sheath seat into the sheath tube, and the sheath seat is detachably connected to the expansion seat;

[0006] It includes a self-locking head, the self-locking head includes a hook head and a hook seat, and the sheath seat and the expansion seat are connected to each other through a plurality of the self-locking heads;

[0007] The self-locking head also includes an elastic plate and a seesaw, wherein the seesaw is vertically arranged at one end of the elastic plate, and the hook head is arranged at one end of the seesaw.

[0008] Furthermore, the plurality of self-locking heads are arranged in pairs and are symmetrical about the axis of the sheath seat and the expansion seat.

[0009] Furthermore, one end of the elastic plate away from the seesaw is connected to the expansion seat, the plate surface of the elastic plate is perpendicular to the axial direction of the expansion seat, and the seesaw is parallel to the axial direction of the expansion seat;

[0010] The hook seat is arranged on the sheath seat.

[0011] Furthermore, one end of the elastic plate away from the seesaw is connected to the sheath seat, the plate surface of the elastic plate is perpendicular to the axial direction of the sheath seat, and the seesaw is parallel to the axial direction of the sheath seat;

[0012] The hook seat is arranged on the expansion seat.

[0013] Furthermore, it also includes a reinforcing rib plate, wherein two adjacent sides of the reinforcing rib plate are respectively vertically connected to the elastic plate and the seesaw, and the lengths of the two sides of the reinforcing rib plate connected to the elastic plate and the seesaw are respectively smaller than the lengths of the elastic plate and the seesaw.

[0014] Furthermore, an end of the seesaw away from the hook head is provided with anti-slip grooves.

[0015] Furthermore, one end of the seesaw away from the anti-slip pattern is connected to the hook head through an arc-shaped connecting portion, and the arc-shaped connecting portion is close to the hook head and deviates toward a side away from the axis of the expansion seat.

[0016] Furthermore, the hook head includes a limiting groove arranged on the inner side, and a protruding limiting block is arranged on the hook seat, and the limiting block is embedded in the limiting groove.

[0017] The technical solution of the embodiment of the utility model has at least the following advantages and beneficial effects:

[0018] 1. When the sheath seat needs to be connected to the expansion seat, it is only necessary to move the sheath seat and the expansion seat toward each other so that the limit block on the sheath seat engages with the limit groove at the corresponding position. After one side engages accurately, the other side also engages automatically. It should be noted that the distance between the two limit blocks must be greater than the distance between the two limit grooves. In this way, while ensuring that the limit grooves and the limit blocks can engage, the elastic deformation of the elastic plate generates elastic force and then cooperates with the seesaw to make the two hook heads and the two hook seats tightly engage, so that the connection between the sheath seat and the expansion seat will not loosen or move axially, and they are tightly connected together. When the sheath seat and the expansion seat need to be removed, it is only necessary to press the seesaw to disengage the limit grooves of the two hook heads from the limit blocks of the two hook seats, and then pull them out axially.

[0019] 2. The two adjacent sides of the reinforcing rib plate are respectively vertically connected to the elastic plate and the seesaw, and the lengths of the two sides where the reinforcing rib plate is connected to the elastic plate and the seesaw are respectively less than the lengths of the elastic plate and the seesaw; in specific implementation, the reinforcing rib plate is mainly used to protect the elastic plate and enhance the service life of the elastic plate, to avoid excessive pressing on the seesaw during use, causing excessive deformation of the elastic plate, and further causing failure of the elastic plate.

[0020] 3. The arc-shaped connecting part can increase the relative distance between the two hook heads relative to the seesaw. When pinching the two protective patterns, pressing can be achieved at a smaller distance. The closer the distance between the two fingers is, the easier it is to exert force, thereby facilitating the separation of the sheath seat and the expansion seat. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the utility model and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying creative work.

[0022] Figure 1 A schematic diagram of the structure of a ureteral guide sheath provided by the utility model;

[0023] Figure 2 A schematic diagram of the three-dimensional structure of a ureteral guide sheath expansion seat and a sheath seat provided by the utility model;

[0024] Figure 3 A schematic structural diagram of a first embodiment of a ureteral guide sheath provided by the utility model;

[0025] Figure 4 This is a structural schematic diagram of a second embodiment of a ureteral guide sheath provided by the utility model;

[0026] Icons: 1. Expansion seat, 2. Expansion tube, 3. Sheath seat, 4. Sheath tube, 5. Self-locking head, 51. Hook head, 511. Limiting groove, 52. Hook seat, 521. Limiting block, 53. Elastic plate, 54. Rocker, 541. Arc-shaped connecting part, 55. Reinforcing rib plate, 56. Anti-slip pattern. DETAILED DESCRIPTION

[0027] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Generally, the components of the embodiments of the utility model described and shown in the drawings here can be arranged and designed in various different configurations.

[0028] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the present invention to be protected, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0029] Embodiment 1:

[0030] Reference Figures 1 to 3As shown, this embodiment provides a ureteral guide sheath, including an expansion seat 1, a sheath seat 3, an expansion tube 2 and a sheath tube 4, one end of the expansion tube 2 is connected to the expansion seat 1, one end of the sheath tube 4 is connected to the sheath seat 3, the expansion tube 2 extends from one side of the sheath seat 3 into the sheath tube 4, and the sheath seat 3 is detachably connected to the expansion seat 1;

[0031] At the same time, it also includes a self-locking head 5, which includes a hook head 51 and a hook seat 52, and the sheath seat 3 and the expansion seat 1 are connected to each other through a plurality of self-locking heads 5;

[0032] The self-locking head 5 also includes an elastic plate 53 and a seesaw 54, wherein the seesaw 54 is vertically arranged at one end of the elastic plate 53, and a hook head 51 is arranged at one end of the seesaw 54. The hook head 51 includes a limiting groove 511 arranged inside, and a protruding limiting block 521 is arranged on the hook seat 52, and the limiting block 521 is embedded in the limiting groove 511.

[0033] A plurality of self-locking heads 5 are arranged in pairs and are symmetrical about the axis of the sheath seat 3 and the expansion seat 1 . Generally, only one pair of self-locking heads 5 is arranged according to actual needs.

[0034] In specific implementation, one end of the elastic plate 53 away from the seesaw 54 is connected to the expansion seat 1, the plate surface of the elastic plate 53 is perpendicular to the axial direction of the expansion seat 1, and the seesaw 54 is parallel to the axial direction of the expansion seat 1; the hook seat 52 is arranged on the sheath seat 3. When it is necessary to connect the sheath seat 3 with the expansion seat 1, it is only necessary to move the sheath seat 3 and the expansion seat 1 toward each other so that the limit block 521 on the sheath seat 3 engages with the limit groove 511 at the corresponding position. After one side is accurately engaged, the other side also engages automatically. It should be noted that the distance between the two limit blocks 521 is greater than the distance between the two limit grooves 511. In this way, while ensuring that the limit grooves 511 and the limit blocks 521 can engage with each other, the elastic deformation of the elastic plate 53 generates elastic force and then cooperates with the rocker 54 to make the two hook heads 51 and the two hook seats 52 tightly engage with each other, so that the connection between the sheath seat 3 and the expansion seat 1 will not be loose and will not move axially, but will be tightly connected together. When it is necessary to remove the sheath seat 3 and the expansion seat 1, it is only necessary to press the rocker 54 to disengage the limit grooves 511 of the two hook heads 51 from the limit blocks 521 of the two hook seats 52, and then pull them out axially.

[0035] More specifically, Figure 2 and 3 As shown, it also includes a reinforcing rib plate 55, and the two adjacent sides of the reinforcing rib plate 55 are respectively vertically connected to the elastic plate 53 and the seesaw 54, and the lengths of the two sides of the reinforcing rib plate 55 connected to the elastic plate 53 and the seesaw 54 are respectively smaller than the lengths of the elastic plate 53 and the seesaw 54; in specific implementation, the reinforcing rib plate 55 is mainly used to protect the elastic plate 53 and enhance the service life of the elastic plate 53, to avoid excessive pressing of the seesaw 54 during use, resulting in excessive deformation of the elastic plate 53, and then causing the elastic plate 53 to fail.

[0036] More specifically, Figure 2 As shown, an end of the seesaw 54 away from the hook head 51 is provided with an anti-skid pattern 56 to prevent fingers from slipping when pressing the seesaw 54, making it easier to use.

[0037] More specifically, one end of the seesaw 54 away from the anti-slip pattern 56 is connected to the hook head 51 through an arc-shaped connecting portion 541. The arc-shaped connecting portion 541 is close to the hook head 51 and is offset toward the side away from the axis of the expansion seat 1. Therefore, the relative distance between the two hook heads 51 can be increased relative to the seesaw 54 through the arc-shaped connecting portion 541. When pinching the two protective patterns 56, pressing can be achieved at a smaller distance. The closer the distance between the two fingers is, the easier it is to exert force, thereby facilitating the separation of the sheath seat 3 from the expansion seat 1.

[0038] Embodiment 2:

[0039] Based on Example 1, Figure 3 As shown, one end of the elastic plate 53 away from the rocker 54 is connected to the sheath seat 3, the plate surface of the elastic plate 53 is perpendicular to the axial direction of the sheath seat 3, and the rocker 54 is parallel to the axial direction of the sheath seat 3; the hook seat 52 is arranged on the expansion seat 1. During specific implementation, the positions of the hook head 51 and the hook seat 52 in Example 1 are opposite to those in Example 1. When controlling the sheath seat 3 to be separated from the expansion seat 1, it is necessary to press the self-locking head on the sheath seat 3 to achieve this, thereby increasing the usage scenarios.

[0040] The above are only preferred embodiments of the present invention and are 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 replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A ureteral guide sheath, comprising an expansion seat (1), a sheath seat (3), an expansion tube (2) and a sheath tube (4), wherein one end of the expansion tube (2) is connected to the expansion seat (1), one end of the sheath tube (4) is connected to the sheath seat (3), the expansion tube (2) extends from one side of the sheath seat (3) into the sheath tube (4), and the sheath seat (3) is detachably connected to the expansion seat (1); Features: It comprises a self-locking head (5), wherein the self-locking head (5) comprises a hook head (51) and a hook seat (52), and the sheath seat (3) and the expansion seat (1) are connected to each other via a plurality of the self-locking heads (5); The self-locking head (5) further comprises an elastic plate (53) and a seesaw (54); the seesaw (54) is vertically arranged at one end of the elastic plate (53); and the hook head (51) is arranged at one end of the seesaw (54).

2. A ureteral guide sheath according to claim 1, characterized in that: The plurality of self-locking heads (5) are arranged in pairs and are symmetrical about the axis of the sheath seat (3) and the expansion seat (1).

3. A ureteral guide sheath according to claim 2, characterized in that: One end of the elastic plate (53) away from the seesaw (54) is connected to the expansion seat (1), the plate surface of the elastic plate (53) is perpendicular to the axial direction of the expansion seat (1), and the seesaw (54) is parallel to the axial direction of the expansion seat (1); The hook seat (52) is arranged on the sheath seat (3).

4. A ureteral guide sheath according to claim 2, characterized in that: One end of the elastic plate (53) away from the seesaw (54) is connected to the sheath seat (3), the plate surface of the elastic plate (53) is perpendicular to the axial direction of the sheath seat (3), and the seesaw (54) is parallel to the axial direction of the sheath seat (3); The hook seat (52) is arranged on the expansion seat (1).

5. A ureteral guide sheath according to any one of claims 3-4, characterized in that: It also includes a reinforcing rib plate (55), wherein two adjacent sides of the reinforcing rib plate (55) are respectively vertically connected to the elastic plate (53) and the seesaw (54), and the lengths of the two sides of the reinforcing rib plate (55) connected to the elastic plate (53) and the seesaw (54) are respectively smaller than the lengths of the elastic plate (53) and the seesaw (54).

6. A ureteral guide sheath according to claim 5, characterized in that: An end of the seesaw (54) away from the hook head (51) is provided with an anti-slip pattern (56).

7. A ureteral guide sheath according to claim 6, characterized in that: One end of the rocker plate (54) away from the anti-slip pattern (56) is connected to the hook head (51) via an arc-shaped connecting portion (541), and the arc-shaped connecting portion (541) is close to the hook head (51) and deviates toward a side away from the axis of the expansion seat (1).

8. A ureteral guide sheath according to claim 6, characterized in that: The hook head (51) comprises a limiting groove (511) arranged on the inner side, and a protruding limiting block (521) is arranged on the hook seat (52), and the limiting block (521) is embedded in the limiting groove (511).

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