Two-stroke calculus removing mesh basket handle

Abstract

The utility model relates to the field of medical instruments, in particular to a two-stroke calculus removing mesh basket handle which comprises a mesh basket assembly, a guide rod assembly, a sliding block and a handle assembly, the mesh basket assembly is composed of a mesh basket head, a core wire, an outer sheath tube and a stress dispersion tube, and the guide rod assembly comprises a guide rod, an elastic piece, a driving block and a front end knob. The driving block and the elastic piece are arranged in the guide rod, and the sliding block is arranged on the guide rod; the guide rod and the outer sheath tube are driven by the sliding block to move, the two-section scutching function of the net basket can be achieved, operation and use can be completed through the sliding block in the using process, a doctor can selectively use the second-section scutching function of the net basket, and only the front end of the sliding block needs to be pressed, so that scutching of the net basket can be achieved. And the limiting lifting block on the sliding block can release limitation on the position of the ejector rod, and the scutching can be continuously increased on the basis of a section of scutching limit size of the mesh basket, so that larger stone fragments can be taken and placed.

Description

Technical Field

[0001] The utility model relates to the field of medical instruments, in particular to a stone-removing net basket handle with two strokes. Background Art

[0002] Human stones are commonly found in the kidneys, ureters, bladders or gallbladders. Worldwide surveys and studies have found that the incidence of stones is about 2% to 20%, and stones can affect patients' normal life and work. Currently, stones can be treated through endoscopic lithotripsy, which provides patients with less pain, fewer postoperative complications and faster recovery. The function of the disposable stone removal basket is to grasp, manipulate and remove stones and other foreign bodies under endoscopy during the diagnosis and treatment of the urinary or digestive system, so as to ensure the normal functioning of human organs.

[0003] Patent CN217285963U discloses a two-stage three-wire variable-range stone-removing basket device, including a core rod, a push rod installed on the outside of the core rod, and a shell installed on the outside of the push rod. The basket can be expanded or retracted by controlling the push rod on the handle. If the first opening width does not meet the stone-removing demand, a larger opening width of the basket can be achieved through a secondary push rod assembly. The structure of this two-stage three-wire variable-range stone-removing basket device can achieve two-stage control of the opening width of the three-wire basket. However, the two-stage opening width function requires the use of components in two different positions to operate. The operating finger has a large movement range. When operating blindly, it is difficult to press the second-stage button in the first time, and two devices are required to complete it. The stability of the second-stage components is insufficient, which increases the failure rate of the device and makes the device composition more complicated. Utility Model Content

[0004] The purpose of the utility model is to provide a two-stage stone-removing basket handle to solve the problem that other patents proposed in the above-mentioned background technology have not solved that extending the opening and closing stroke requires the use of two devices to complete, increases the failure rate of the device and makes the device composition more complicated.

[0005] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0006] A two-stage stone-removing basket handle comprises a basket assembly, a guide rod assembly, a slider 6 and a handle assembly. The basket assembly is composed of a basket head 1, a core wire 12, an outer sheath tube 2 and a stress dispersion tube 3. The guide rod assembly comprises a guide rod 5, an elastic member 9, a drive block 10 and a front knob 4. The drive block 10 and the elastic member 9 are arranged in the guide rod 5. The slider 6 is arranged on the guide rod 5. The handle assembly is composed of a handle housing 7, a tail knob 8, a self-tightening column 13 and a push rod 11. The guide rod 5 cooperates with the handle housing 7, and the basket assembly cooperates with the guide rod 5. The slider 6 on the guide rod 5 is exposed through a long slot on the handle housing 7, and the slider 6 drives the guide rod 5 to move in the housing handle 7.

[0007] The slider 6 is connected with the guide rod 5; after mutual cooperation, the slider 6 can be pressed on the guide rod 5; the two driving blocks 10 are respectively arranged at both ends of the elastic member 9, the driving blocks 10 and the elastic member 9 are both arranged in the guide rod 5, and the guide rod 5 is arranged in the handle housing 7.

[0008] The slider 6 is provided with a pressing portion 60 and a pushing portion 62, a sliding arm 63 is provided below the pressing portion 60, a limit block 61 is provided below the pushing portion 62, a rotating shaft clamp hole 64 is provided in the middle of the boundary between the pressing portion 60 and the pushing portion 62, the slider 6 is connected with the rotating shaft 51 on the guide rod 5 through the rotating shaft clamp hole 64, and the slider 6 can rotate around the rotating shaft 51 on the guide rod 5 after mutual cooperation, and a plurality of anti-slip protrusions are provided on the surface of the slider 6. The limit block 61 restricts the push rod 11 when the slider 6 is not pressed down, and after the pressing portion 60 of the slider 6 is pressed, the limit block 11 is lifted, and the restriction on the push rod is cancelled, and the slider 6 can be pushed to the handle end to start the second stroke.

[0009] A stopper 101 is protruding from the surface of the driving block 10, and a through hole 102 is opened inside. The stopper 101 contacts with the sliding arm 63 to form a sliding pair. When the pressing part 60 is pressed, the sliding arm 63 pushes the stopper 101, so that the driving block 10 moves linearly in the inner cavity of the guide rod 5 and compresses the elastic part 9 to accumulate elastic potential energy; when the pressing part 60 is released, the elastic part 9 releases the elastic potential energy and pushes the driving block 10 to reset, thereby driving the pressing part 60 to bounce back to its original position.

[0010] The elastic member 9 is a spring, a spring sheet or other elastic objects suitable for use.

[0011] The core wire 12 is placed in the outer sheath tube 2, one end of the outer sheath tube 2 is fixedly connected to the basket head 1, and the other end is fixedly connected to the stress dispersion tube 3. The flange part of the stress dispersion tube 3 is installed in the front end knob 4 of the guide rod 5, and the front end knob 4 and the guide rod 5 are tightened by threads to fix the flange part of the stress dispersion tube.

[0012] The outer surface of one end of the core wire 12 is sleeved with a push rod 11, which is arranged in the handle housing 7. The self-tightening column 13 and the tail knob 8 are arranged at the end of the handle housing 7, and the tail knob 8 cooperates with the self-tightening column 13 to fix the core wire 12.

[0013] Compared with the prior art, the utility model has the following beneficial effects:

[0014] The utility model drives the guide rod and the two sections of the outer sheath tube to move by a slider, so as to realize the function of opening the two sections of the net basket. When in use, the operation can be completed by a slider. The doctor can selectively use the function of opening the second section of the net basket. It only needs to press the front end of the slider, and the limit lifting block on the slider can release the restriction on the position of the push rod. The opening width can continue to be increased on the basis of the maximum size of the opening width of the first section of the net basket to grab larger stone fragments. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0016] Figure 2 This is a schematic diagram of the split structure of the utility model;

[0017] Figure 3 It is a schematic diagram of the overall cross-sectional structure of the utility model;

[0018] Figure 4 This is a schematic diagram of the fixing structure of the guide rod and the slider of the utility model;

[0019] Figure 5 This is a schematic diagram of the slider structure of the utility model;

[0020] Figure 6 This is a schematic diagram of the structure of the drive block of the utility model;

[0021] Figure 7 This is a schematic diagram of the guide rod slider structure of Example 2 of the utility model.

[0022] In the figure: 1. basket head; 2. outer sheath; 3. stress dispersion tube; 4. front end spiral; 5. guide rod; 50. limit protrusion; 51. rotating shaft; 6. slider; 60. pressing part; 61. limit block; 62. pushing part; 63. sliding arm; 64. rotating shaft clamping hole 7. handle shell; 8. tail knob; 9. elastic part; 10. driving block; 11. push rod; 12. core wire; 13. self-tightening column. DETAILED DESCRIPTION

[0023] In order to clarify the technical problems, technical solutions, implementation processes and performance demonstrations, the utility model is further described in detail below in conjunction with the embodiments. It should be understood that the specific embodiments described herein are for explanation only. The utility model is not intended to limit the utility model. Various exemplary embodiments, features and aspects of the present disclosure will be described in detail below with reference to the accompanying drawings. The same figure numbers in the drawings represent elements with the same or similar functions. Although various aspects of the embodiments are shown in the drawings, the drawings do not have to be drawn to scale unless otherwise specified.

[0024] The word “exemplary” is used exclusively herein to mean “serving as an example, example, or illustration.” Any embodiment described herein as “exemplary” is not necessarily to be construed as preferred or advantageous over other embodiments.

[0025] In addition, in order to better illustrate the present disclosure, numerous specific details are given in the following specific embodiments. It should be understood by those skilled in the art that the present disclosure can also be implemented without certain specific details. In some examples, methods, means, components and circuits well known to those skilled in the art are not described in detail in order to highlight the main purpose of the present disclosure.

[0026] Example 1

[0027] like Figure 1-Figure 7 As shown, a two-stage stone-removing basket handle comprises a basket assembly, a guide rod assembly, a slider 6 and a handle assembly. The basket assembly comprises a basket head 1, a core wire 12, an outer sheath tube 2 and a stress dispersion tube 3. The guide rod assembly comprises a guide rod 5, an elastic member 9, a drive block 10 and a front knob 4. The drive block 10 and the elastic member 9 are arranged in the guide rod 5. The slider 6 is arranged on the guide rod 5. The handle assembly comprises a handle housing 7, a tail knob 8, a self-tightening column 13 and a push rod 11. The guide rod 5 cooperates with the handle housing 7, and the basket assembly cooperates with the guide rod 5. The slider 6 on the guide rod 5 is exposed through the long slot on the handle housing 7, and the slider 6 drives the guide rod 5 to move in the housing handle 7.

[0028] The slider 6 is connected with the guide rod 5; after mutual cooperation, the slider 6 can be pressed on the guide rod 5; the two driving blocks 10 are respectively arranged at both ends of the elastic member 9, the driving blocks 10 and the elastic member 9 are both arranged in the guide rod 5, and the guide rod 5 is arranged in the handle housing 7.

[0029] The slider 6 is provided with a pressing portion 60 and a pushing portion 62, a sliding arm 63 is provided below the pressing portion 60, a limiting block 61 is provided below the pushing portion 62, a rotating shaft clamping hole 64 is provided in the middle of the boundary between the pressing portion 60 and the pushing portion 62, the slider 6 is connected with the rotating shaft 51 on the guide rod 5 through the rotating shaft clamping hole 64, and the slider 6 can rotate around the rotating shaft 51 on the guide rod 5 after mutual cooperation, and a plurality of anti-slip protrusions are provided on the surface of the slider 6. The limiting block 61 restricts the push rod 11 when the slider 6 is not pressed down, and after the pressing portion 60 of the slider 6 is pressed, the limiting block 11 is lifted, canceling the restriction on the push rod, and the slider 6 can be pushed toward the handle end again to start the second stroke.

[0030] A stopper 101 is protruded from the surface of the driving block 10, and a through hole 102 is opened inside. When the pressing part 60 is pressed, the sliding arm 63 pushes the stopper 101, so that the driving block 10 moves linearly in the inner cavity of the guide rod 5 and compresses the elastic part 9 to accumulate elastic potential energy; when the pressing part 60 is released, the elastic part 9 releases the elastic potential energy and pushes the driving block 10 to reset, thereby driving the pressing part 60 to bounce back to its original position.

[0031] The guide rod 5 is provided with an L-shaped limiting protrusion 50 on the side thereof, and the limiting protrusion 50 plays a supporting role.

[0032] The elastic member 9 is a spring, a spring sheet or other elastic objects suitable for use.

[0033] The core wire 12 is placed in the outer sheath tube 2, one end of the outer sheath tube 2 is fixedly connected to the basket head 1, and the other end is fixedly connected to the stress dispersion tube 3. The flange part of the stress dispersion tube 3 is installed in the front end knob 4 of the guide rod 5, and the front end knob 4 and the guide rod 5 are tightened by threads to fix the flange part of the stress dispersion tube.

[0034] The outer surface of one end of the core wire 12 is sleeved with a push rod 11, which is arranged in the handle housing 7. The self-tightening column 13 and the tail knob 8 are arranged at the end of the handle housing 7, and the tail knob 8 cooperates with the self-tightening column 13 to fix the core wire 12.

[0035] When in use, when the limit block 61 is not lifted, the slider 6 can be moved, and the slider 6 drives the guide rod 5 and the driving block 10 to move toward the handle end. When the end of the guide rod 5 is fitted with the push rod, the limit block 61 blocks the hole at the end of the guide rod 5, and the hole of the guide rod 5 cannot pass through the push rod 11, thereby limiting the movement of the slider 6 and the guide rod 5. At this time, the opening size of one section of the basket reaches the limit; after the slider 6 is pressed downward at the front end, the second section of the stroke is started, and the limit block 61 at the rear end is lifted, and the hole at the end of the guide rod 5 can pass through the push rod 11, The rod 11 fits with the driving block 10 arranged at one end of the elastic member 9. When the slider 6 moves toward the handle end again, the driving block 10 near the handle end is supported by the push rod 11, and the slider 6 drives the guide rod to continue to move toward the handle end. At the same time, the driving block 10 away from the handle end compresses the elastic member 9. The hole at the end of the guide rod 5 passes through the push rod 11, so that a part of the push rod 11 is located in the internal cavity of the guide rod to resist the elastic member 9. When the elastic member 9 is compressed and can no longer be compressed, the slider 6 moves to the maximum, and the size of the second section of the basket reaches the limit. When it is necessary to grab stone fragments, that is, when the basket head 1 needs to be contracted, the slider 6 can slide toward the basket head.

[0036] Example 2

[0037] A two-stage stone-removing basket handle comprises a basket assembly, a guide rod assembly, a slider 6 and a handle assembly. The basket assembly is composed of a basket head 1, a core wire 12, an outer sheath tube 2 and a stress dispersion tube 3. The guide rod assembly comprises a guide rod 5, an elastic member 9, a drive block 10 and a front knob 4. The drive block 10 and the elastic member 9 are arranged in the guide rod 5. The slider 6 is arranged on the guide rod 5. The handle assembly is composed of a handle housing 7, a tail knob 8, a self-tightening column 13 and a push rod 11. The guide rod 5 cooperates with the handle housing 7, and the basket assembly cooperates with the guide rod 5. The slider 6 on the guide rod 5 is exposed through a long slot on the handle housing 7, and the slider 6 drives the guide rod 5 to move in the housing handle 7.

[0038] The slider 6 is connected with the guide rod 5; after mutual cooperation, the slider 6 can be pressed on the guide rod 5; the two driving blocks 10 are respectively arranged at both ends of the elastic member 9, the driving blocks 10 and the elastic member 9 are both arranged in the guide rod 5, and the guide rod 5 is arranged in the handle housing 7.

[0039] The L-shaped limit protrusion 50 provided on the side of the guide rod 5 transforms the L-shaped limit protrusion 50 into a 7-shaped limit protrusion. After the slider is assembled, the 7-shaped limit protrusion 50 is in the groove between the sliding arm 63 and the slider body. The limit protrusion 50 limits the movement of the sliding arm, thereby limiting the slider 6 from pressing down to start the second stroke. At this time, there is no need to install the drive block 10 and the elastic member 9. It is used for the installation of a one-stage basket and is used for known smaller stones.

[0040] The above shows and describes the basic principle, main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions are only preferred examples of the utility model and are not used to limit the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of the utility model to be protected. The scope of protection of the utility model is defined by the attached claims and their equivalents.

Claims

1. A two-stage stone basket handle, characterized in that: The invention comprises a basket assembly, a guide rod assembly, a slider (6) and a handle assembly, wherein the basket assembly comprises a basket head (1), a core wire (12), an outer sheath tube (2) and a stress dispersion tube (3), the guide rod assembly comprises a guide rod (5), an elastic member (9), a drive block (10) and a front end knob (4), the drive block (10) and the elastic member (9) are arranged in the guide rod (5), the slider (6) is arranged on the guide rod (5), and the handle assembly comprises a handle housing (7), a tail knob (8), a self-tightening column (13) and a push rod (11); the guide rod (5) cooperates with the handle housing (7), and the basket assembly cooperates with the guide rod (5); The slider (6) is connected to the guide rod (5) in a cooperative manner; after the two sliders (6) are cooperatively connected, they can be pressed on the guide rod (5); the two driving blocks (10) are respectively arranged at two ends of the elastic member (9), the driving blocks (10) and the elastic member (9) are both arranged in the guide rod (5), and the guide rod (5) is arranged in the handle housing (7).

2. The two-stage stone-removing basket handle according to claim 1, characterized in that: The slider (6) is provided with a pressing portion (60) and a pushing portion (62); a sliding arm (63) is provided below the pressing portion (60); a limiting block (61) is provided below the pushing portion (62); a rotating shaft clamping hole (64) is provided in the middle of the boundary between the pressing portion (60) and the pushing portion (62); the slider (6) is connected to the rotating shaft (51) on the guide rod (5) through the rotating shaft clamping hole (64); after the slider (6) and the pushing portion (62) are connected, the slider (6) can rotate on the guide rod (5) around the rotating shaft (51); the limiting block (61) blocks the inner cavity of the guide rod (5); and a plurality of anti-slip protrusions are provided on the surface of the slider (6).

3. The two-stage stone-removing basket handle according to claim 2, characterized in that: The driving block (10) has a stopper (101) protruding from its surface and a through hole (102) opened inside. The stopper (101) contacts with the sliding arm (63) to form a sliding pair.

4. The two-stage stone-removing basket handle according to claim 2, characterized in that: The elastic member (9) is a spring or a spring sheet.

5. The two-stage stone-removing basket handle according to claim 1, characterized in that: The core wire (12) is placed in the outer sheath tube (2); one end of the outer sheath tube (2) is fixedly connected to the basket head (1), and the other end is fixedly connected to the stress dispersion tube (3); the flange portion of the stress dispersion tube (3) is installed in the front end knob (4) of the guide rod (5); the front end knob (4) and the guide rod (5) are screwed together by threads to fix the flange portion of the stress dispersion tube (3).

6. The two-stage stone-removing basket handle according to claim 1, characterized in that: A push rod (11) is sleeved on the outer surface of one end of the core wire (12), and the push rod (11) is arranged in the handle housing (7). A self-tightening column (13) and a tail knob (8) are arranged at the end of the handle housing (7), and the tail knob (8) cooperates with the self-tightening column (13) to fix the core wire (12).

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