Medical handle and medical lithotriptor

Abstract

The application provides a medical handle. The medical handle comprises a handle body, a rack, a driving mechanism, a matching assembly configured to engage with the rack and to respond to the driving mechanism and to generate an engagement force on the rack capable of pushing the rack to move, and a reversing mechanism operatively associated with the matching assembly to realize engagement or disengagement of the matching assembly with the rack, which has three working states. In the first working state, the first matching member and the second matching member are engaged with the rack respectively to lock the rack. In the second working state, the first matching member responds to the handle body and pushes the rack to move forward. In the third working state, the second matching member responds to the handle body and pushes the rack to move backward. The medical handle of the application can move in two directions and will not move due to the reaction force during the reversing process, and has simple structure and strong operability.

Description

Technical Field

[0001] This invention relates to a medical handle and a medical lithotripter. Background Technology

[0002] In some surgeries, internal lithotripsy is required. During lithotripsy, the stone site needs to be repeatedly compressed to gradually break it up. Therefore, significant force is required, and the direction of the lithotripter needs to be frequently changed. This necessitates the use of a lithotripsy handle, which controls the direction of the moving rod. However, in current lithotripsy handles, the moving rod is in a free state when changing direction, and the reaction force during this process can cause the rod to wobble, posing a safety hazard and hindering the operation and control by medical personnel. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to provide a medical handle that can achieve bidirectional drive and will not sway due to reaction force during the reversal process.

[0004] To achieve the above objectives, the technical solution adopted by the present invention is as follows:

[0005] A medical handle includes a housing; a rack slidably disposed on the housing, with teeth distributed on opposite sides of the rack; a drive mechanism including a handle body movably disposed on the housing; a mating assembly including a first mating member and a second mating member configured to engage with opposite sides of the rack, the first and second mating members responding to the handle body and generating a meshing force on the rack capable of pushing the rack to move, the direction of the meshing force of the first mating member on the rack being opposite to the direction of the meshing force of the second mating member on the rack; and a reversing mechanism operable with the mating assembly. The components are operatively associated to enable engagement or disengagement between the mating components and the rack; the medical handle has three operating states: in the first operating state, the first mating component and the second mating component are respectively engaged with the rack to lock the rack; in the second operating state, the first mating component is engaged with the rack and the second mating component is disengaged from the rack, and the first mating component responds to the handle body and pushes the rack forward; in the third operating state, the second mating component is engaged with the rack and the first mating component is disengaged from the rack, and the second mating component responds to the handle body and pushes the rack backward.

[0006] Preferably, the first mating member and the second mating member are rotatably disposed on the handle body, such that the first mating member and the second mating member can both rotate and slide relative to the housing.

[0007] Preferably, the first and second mating parts are pawls, the pawls having claw portions that can extend into the teeth of the rack, and when the pawls respond to the handle body, the pawls rotate and slide relative to the housing, causing the claw portions to push the rack to move along the axial direction of the rack.

[0008] More preferably, a first torsion spring and a second torsion spring are respectively provided on the rotating shafts of the first mating member and the second mating member. One end of the first torsion spring is pressed onto the first mating member, and the other end is provided on the handle body, so that the first mating member responds to the handle body; one end of the second torsion spring is pressed onto the second mating member, and the other end is provided on the handle body, so that the second mating member responds to the handle body.

[0009] Preferably, the first mating member and the second mating member are arranged facing each other or facing away from each other.

[0010] According to some preferred embodiments, the mating assembly further includes a third mating member and a fourth mating member rotatably disposed on the housing. The third mating member and the fourth mating member are configured to engage with opposite sides of the rack, respectively. The third mating member and the first mating member are arranged in the same direction, and the third mating member and the first mating member simultaneously engage with or disengage from the rack. The fourth mating member and the second mating member are arranged in the same direction, and the fourth mating member and the second mating member simultaneously engage with or disengage from the rack.

[0011] More preferably, the third mating component and the fourth mating component are ratchet pawls.

[0012] More preferably, a third torsion spring and a fourth torsion spring are respectively provided on the rotating shafts of the third mating member and the fourth mating member. One end of the third torsion spring is pressed onto the third mating member, and the other end is provided on the housing, so that the third mating member can rotate relative to the housing in response to the rack; one end of the fourth torsion spring is pressed onto the fourth mating member, and the other end is provided on the housing, so that the fourth mating member can rotate relative to the housing in response to the rack.

[0013] Preferably, the reversing mechanism includes an operating member, an eccentric member having a central input shaft and an eccentric output shaft, and a sliding member. The operating member is drivenly connected to the central input shaft of the eccentric member. The sliding member has a guide groove, and the eccentric output shaft of the eccentric member is inserted into the guide groove, so that the sliding member can slide along a first direction and push the mating assembly, thereby disengaging the mating assembly from the rack.

[0014] More preferably, the slider has an extension that can contact the mating assembly. The slider has a first through hole and a second through hole respectively along a second direction and a third direction. The first direction, the second direction, and the third direction are perpendicular to each other. The rack passes through the first through hole and is partially disposed within the first through hole. The operating member passes through the second through hole and is partially disposed within the second through hole. The first through hole and the second through hole extend along the first direction. By rotating the operating member, the slider can move along the first direction and push the mating assembly.

[0015] More preferably, one side portion of the mating component protrudes from the rack and extends outward, the extension being located between one side portions of the mating components on opposite sides.

[0016] Preferably, the rotation angle of the operating element is 0°~90° or -90°~0°.

[0017] More preferably, the rotation angle of the operating element is 0°~45° or -45°~0°.

[0018] More preferably, the rotation angle of the operating element is 0°~30° or -30°~0°.

[0019] Preferably, the operating member passes through the eccentric member and its two ends protrude from both sides of the housing and are exposed. The two ends of the operating member are provided with rotating rods to facilitate rotational operation.

[0020] Preferably, the handle body is rotatably mounted on the housing around a first rotation axis, and an elastic return member is provided at the rotation axis of the handle body, so that the handle body has a tendency to open.

[0021] More preferably, the elastic return element is a torsion spring, with one end arm of the torsion spring located on the handle body and the other end arm passing through the housing and slidably connected to the housing.

[0022] Preferably, the housing includes a first outer shell and a second outer shell, with a receiving chamber between the first outer shell and the second outer shell, and a portion of the rack, the mating assembly, and a portion of the reversing mechanism are disposed in the receiving chamber.

[0023] Preferably, the medical handle further includes a shock-absorbing component disposed within the housing and elastically connected to the rack, the shock-absorbing component being used to prevent the rack from shifting.

[0024] Preferably, the medical handle further includes a connecting seat connected to one end of the rack, and one or more of a balloon inflator and a lithotripsy basket can be connected to the connecting seat.

[0025] The present invention also provides a medical lithotripter, which includes the above-mentioned medical handle.

[0026] Due to the application of the above technical solution, the present invention has the following advantages compared with the prior art:

[0027] The medical handle of the present invention can move in both directions and will not shift due to reaction force during the reversal process. It has a simple structure and is highly operable. Attached Figure Description

[0028] Figure 1 This is a schematic diagram of the structure of the medical handle in Embodiment 1 of the present invention;

[0029] Figure 2 This is a front view of the medical handle in Embodiment 1 of the present invention;

[0030] Figure 3 This is a rear view of the medical handle in Embodiment 1 of the present invention;

[0031] Figure 4 This is a top view of the medical handle in Embodiment 1 of the present invention;

[0032] Figure 5 for Figure 4 A sectional view along the AA direction;

[0033] Figure 6 This is a schematic diagram of the structure of the medical handle (excluding the second shell and drive mechanism) in Embodiment 1 of the present invention;

[0034] Figure 7 This is a schematic diagram of the structure of the medical handle (excluding the first outer shell and drive mechanism) in Embodiment 1 of the present invention;

[0035] Figure 8 This is a schematic diagram of the structure of the medical handle (excluding the first outer shell) in Embodiment 1 of the present invention;

[0036] Figure 9 This is a front view of the medical handle (excluding the first outer shell and drive mechanism) in the first working state according to Embodiment 1 of the present invention;

[0037] Figure 10 This is a rear view of the medical handle (excluding the first outer shell and drive mechanism) in the first working state according to Embodiment 1 of the present invention;

[0038] Figure 11 This is a front view of the medical handle (excluding the first shell and drive mechanism) in Embodiment 1 of the present invention when it is in the second working state;

[0039] Figure 12This is a front view of the medical handle (excluding the first outer shell and drive mechanism) in Embodiment 1 of the present invention when it is in the third working state;

[0040] Figure 13 This is a schematic diagram of the reversing mechanism and rack in Embodiment 1 of the present invention;

[0041] Figure 14 This is a schematic diagram of the structure of the medical handle in Embodiment 2 of the present invention;

[0042] Wherein, 1 is the shell; 11 is the first outer shell; 12 is the second outer shell;

[0043] 2. Rack; 21. Tooth;

[0044] 3. Drive mechanism; 31. Handle body; 32. Elastic return component;

[0045] 4. Mating components; 41. First mating part; 411. Claw portion of the first mating part; 42. Second mating part; 421. Claw portion of the second mating part; 43. Third mating part; 431. Claw portion of the third mating part; 44. Fourth mating part; 441. Claw portion of the fourth mating part; 45. First torsion spring; 46. Second torsion spring; 47. Third torsion spring; 48. Fourth torsion spring;

[0046] 5. Reversing mechanism; 51. Operating component; 52. Eccentric component; 53. Sliding component; 531. Extension; 532. First through hole; 54. Rotating rod; 55. Operating component;

[0047] 6. Connecting base;

[0048] 7. Connectors;

[0049] 8. Vibration damping components;

[0050] a, rotation angle; x, first direction; y, second direction; z, third direction; r, first rotation axis. Detailed Implementation

[0051] The present invention will be further described below with reference to embodiments. However, the present invention is not limited to the following embodiments. The implementation conditions used in the embodiments can be further adjusted according to different requirements of specific applications, and the implementation conditions not specified are conventional conditions in the industry. The technical features involved in the various embodiments of the present invention can be combined with each other as long as they do not conflict with each other.

[0052] In the following description, only certain exemplary embodiments are briefly described. As those skilled in the art will recognize, the described embodiments can be modified in various ways without departing from the spirit or scope of the embodiments of the invention. Therefore, the drawings and description are considered to be exemplary in nature and not restrictive.

[0053] In the description of the embodiments of the present invention, it should be understood that the terms "front", "back", "left", "right", etc., indicate the orientation or positional relationship based on the direction or positional relationship observed by the operator when the medical handle is in normal use and the operator holds the medical handle. They are only for the convenience of describing the embodiments of the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of the present invention.

[0054] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of embodiments of the present invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0055] The following disclosure provides many different implementations or examples for carrying out different structures of the embodiments of the present invention. To simplify the disclosure of the embodiments of the present invention, specific examples of components and arrangements are described below. Of course, these are merely examples and are not intended to limit the embodiments of the present invention. Furthermore, reference numerals and / or reference letters may be repeated in different examples of the embodiments of the present invention; such repetition is for simplification and clarity and does not in itself indicate a relationship between the various implementations and / or arrangements discussed.

[0056] Example 1

[0057] A medical handle includes a housing 1, a rack 2 slidably disposed on the housing 1, a drive mechanism 3 movably disposed on the housing 1, a mating assembly 4 configured to engage with the rack 2 and respond to the drive mechanism 3 to generate a mating force on the rack 2 capable of pushing the rack 2 to move, and a reversing mechanism 5 operably associated with the mating assembly 4 to realize engagement or disengagement between the mating assembly 4 and the rack 2.

[0058] See Figures 1 to 4 The rack 2 has teeth 21 distributed on both sides of its opposite sides. In this invention, the opposite sides refer to the upper and lower sides or the left and right sides. In this embodiment, the rack 2 has teeth 21 distributed on both the upper and lower sides of its opposite sides. The rack 2 is slidably disposed on the housing 1 in the front-back direction and can move forward or backward in response to the drive mechanism 3.

[0059] See Figure 5The mating assembly 4 includes a first mating member 41 and a second mating member 42 configured to mesh with opposite sides of the rack 2 respectively. The first mating member 41 and the second mating member 42 respond to the drive mechanism 3 and generate a meshing force on the rack 2 that can push the rack 2 to move. The direction of the meshing force of the first mating member 41 on the rack 2 is opposite to the direction of the meshing force of the second mating member 42 on the rack 2.

[0060] The medical handle has three working states. In the first working state, the first mating part 41 and the second mating part 42 engage with the rack 2 to lock the rack 2. In the second working state, the first mating part 41 engages with the rack 2 and the second mating part 42 disengages from the rack 2. The first mating part 41 responds to the drive mechanism 3 and pushes the rack 2 forward. In the third working state, the second mating part 42 engages with the rack 2 and the first mating part 41 disengages from the rack 2. The second mating part 42 responds to the drive mechanism 3 and pushes the rack 2 backward. In this embodiment, when the first mating part 41 and the second mating part 42 are simultaneously engaged with the rack 2 (first working state), the meshing force of the first mating part 41 on the rack 2 is equal to the meshing force of the second mating part 42 on the rack 2, thereby limiting the axial movement of the rack 2. This design avoids axial movement of the rack 2 due to reaction force when switching the direction of movement.

[0061] The first mating member 41 and the second mating member 42 are rotatably mounted on the drive mechanism 3, such that the first mating member 41 and the second mating member 42 can both rotate and slide relative to the housing 1. The rotation axes of the first mating member 41 and the second mating member 42 are parallel and extend in the left-right direction.

[0062] Specifically, the first mating part 41 and the second mating part 42 are pawls, each having a claw portion capable of extending into the spaces between the teeth 21 of the rack 2. See also Figure 9 , Figure 10 When the medical handle is in its first working state, the claw portion 411 of the first mating member and the claw portion 421 of the second mating member respectively extend into the spaces between the teeth 21 on opposite sides of the rack 2, locking the rack 2; see also Figure 11 When the medical handle is in the second working state and the first mating member 41 responds to the drive mechanism 3, the first mating member 41 rotates and slides relative to the housing 1, causing the claw portion 411 of the first mating member to push the rack 2 forward along the axial direction of the rack 2; see also Figure 12 When the second mating member 42 responds to the drive mechanism 3, the second mating member 42 rotates and slides relative to the housing 1, causing the claw portion 421 of the second mating member to push the rack 2 to move backward along the axial direction of the rack 2.

[0063] Further, see Figures 5 to 7A first torsion spring 45 and a second torsion spring 46 are respectively provided on the rotating shafts of the first mating member 41 and the second mating member 42. One end of the first torsion spring 45 is pressed on the first mating member 41, and the other end is provided on the driving mechanism 3, so that the first mating member 41 responds to the driving mechanism 3; one end of the second torsion spring 46 is pressed on the second mating member 42, and the other end is provided on the driving mechanism 3, so that the second mating member 42 responds to the driving mechanism 3.

[0064] In this embodiment, the mating assembly 4 further includes a third mating member 43 and a fourth mating member 44 rotatably disposed on the housing 1. The third mating member 43 and the fourth mating member 44 are configured to mesh with opposite sides of the rack 2, respectively. The rotation axes of the third mating member 43 and the fourth mating member 44 are parallel and extend in the left-right direction. The third mating member 43 and the first mating member 41 are arranged in the same direction, and the third mating member 43 and the first mating member 41 simultaneously mesh with or disengage from the rack 2. The fourth mating member 44 and the second mating member 42 are arranged in the same direction, and the fourth mating member 44 and the second mating member 42 simultaneously mesh with or disengage from the rack 2. Taking the third mating part 43 as an example, when the first mating part 41 responds to the drive mechanism 3 and generates a forward pushing force on the rack 2, the rack 2 moves forward and drives the third mating part 43 to rotate; while when the first mating part 41 responds to the drive mechanism 3 and generates a backward pushing force on the rack 2, the third mating part 43 meshes with the rack 2, making the rack 2 unable to move backward, thus realizing the one-way self-locking of the rack 2.

[0065] Specifically, see Figure 5 , Figure 7 , Figures 9 to 12 The third mating component 43 and the fourth mating component 44 are pawls, each with a claw portion capable of extending between the teeth 21 of the rack 2. When the third mating component 43 and the fourth mating component 44 are respectively engaged with the rack 2, the claw portion 431 of the third mating component and the claw portion 441 of the fourth mating component extend between the teeth 21 on both sides of the rack 2. The mating assembly 4 also includes a third torsion spring 47 and a fourth torsion spring 48 respectively disposed on the rotating shafts of the third mating component 43 and the fourth mating component 44. One end of the third torsion spring 47 is pressed against the third mating component 43, and the other end is disposed on the housing 1, causing the third mating component 43 to rotate relative to the housing 1 in response to the rack 2; one end of the fourth torsion spring 48 is pressed against the fourth mating component 44, and the other end is disposed on the housing 1, causing the fourth mating component 44 to rotate relative to the housing 1 in response to the rack 2.

[0066] The reversing mechanism 5 includes an operating member 51, an eccentric member 52 having a central input shaft and an eccentric output shaft, and a sliding member 53.

[0067] See Figure 13The operating element 51 is drivenly connected to the central input shaft of the eccentric element 52. The sliding element 53 has a guide groove (not shown in the figure), and the eccentric output shaft of the eccentric element 52 (not shown in the figure) is inserted into the guide groove, so that the sliding element 53 can slide along the first direction x (up and down direction) and push the mating component 4 located on the upper side of the rack 2 or the mating component 4 located on the lower side of the rack 2, so that the mating component 4 located on the upper side of the rack 2 or the mating component 4 located on the lower side of the rack 2 disengages from the rack 2. In this embodiment, the central input shaft and the eccentric output shaft are parallel and extend along the left and right direction.

[0068] Specifically, the slider 53 has an extension 531 that can contact the mating component 4. The slider 53 has a first through hole 532 and a second through hole (not shown in the figure) along the second direction y (front-back direction) and the third direction z (left-right direction), respectively. The first direction x, the second direction y, and the third direction z are perpendicular to each other. The rack 2 passes through the first through hole 532 and is partially disposed within it. The operating member 51 passes through the second through hole and is partially disposed within it. The first through hole 532 and the second through hole extend along the first direction x, respectively. Operating the operating member 51 causes it to rotate around the third direction z, moving the slider 53 along the first direction x. The rotation angle α of the operating member 51 is 0°~90° or -90°~0°. In this embodiment, see... Figure 11 The operating member 51 can be rotated 30° clockwise, causing the sliding member 53 to move downward, thereby disengaging the mating components 4 (second mating member 42 and fourth mating member 44) located below the rack 2 from the rack 2; the operating member 51 can also be rotated 30° counterclockwise (i.e., rotated -30°), causing the sliding member 53 to move upward, thereby disengaging the mating components 4 (first mating member 41 and third mating member 43) located above the rack 2 from the rack 2.

[0069] Further, see Figure 6 One side of each of the mating components 4 (first mating member 41, second mating member 42, third mating member 43, and fourth mating member 44) protrudes outward from the rack 2, and the extension 531 is located between the side portions of the mating members on opposite sides. In this way, the first mating member 41 and the second mating member 42, or the third mating member 43 and the fourth mating member 44 and the rack 2 can be simultaneously engaged or disengaged.

[0070] In this embodiment, the operating member 51 passes through the eccentric member 52 and its two ends protrude from both sides of the housing 1 and are exposed. In order to facilitate the rotation of the operating member 51, a rotating rod 54 is provided at both ends of the operating member 51. The axis of the rotating rod 54 is perpendicular to the axis of the operating member 51, and an operating part 55 is sleeved on the outer side of the rotating rod 54.

[0071] The drive mechanism 3 includes a handle body 31 rotatably mounted on the housing 1 about a first rotation axis r, and an elastic return member 32 disposed at the pivot of the handle body 31, giving the handle body 31 a tendency to open. In this embodiment, the first rotation axis r passes through the rack 2 and extends in the left-right direction.

[0072] See Figure 5 and Figure 8 The elastic return element 32 is a torsion spring, with one end arm of the torsion spring located on the handle body 31 and the other end arm passing through the housing 1 and slidably connected to the housing 1. The first mating part 41 and the second mating part 42 are respectively rotatably mounted on the handle body 31.

[0073] The housing 1 includes a first outer shell 11 and a second outer shell 12, with a receiving chamber between the first outer shell 11 and the second outer shell 12, and a portion of the rack 2, the mating assembly 4 and a portion of the reversing mechanism 5 are disposed in the receiving chamber.

[0074] In this embodiment, the medical handle also includes a shock-absorbing component 8 disposed within the housing 1 and elastically connected to the rack 2. The shock-absorbing component 8 is used to prevent the rack 2 from shifting. Specifically, one end of the shock-absorbing component 8 abuts against the first housing 11 and the second housing 12, and the other end abuts against the rack 2. The shock-absorbing component 8 is located at the rear end of the rack 2.

[0075] In this embodiment, the medical handle also includes a connecting seat 6 connected to the rear end of the rack.

[0076] Example 2

[0077] join Figure 14 This embodiment is basically the same as Embodiment 1, except that the medical handle in this embodiment also includes a connector 7. The connector 7 is disposed on the housing 1, and its rear end is connected to the connecting seat 6. The connector 7 includes, but is not limited to, a balloon inflator and a lithotripsy basket. The structure of the balloon inflator and the lithotripsy basket refers to the prior art, and this invention does not impose specific limitations. For example, when used with a balloon inflator, it can pressurize and inflate the balloon by moving forward and de-vacuum the balloon by moving backward; as another example, when used with a lithotripsy basket, it can crush stones by moving forward and open the basket by moving backward. Of course, the connector can also be used with various instruments that require bidirectional movement and self-locking, such as snares. Here, this invention does not impose specific limitations. In this invention, the connector 7 itself is an independent medical device that can be installed on the medical handle at any time and removed at any time.

[0078] Example 3

[0079] This embodiment provides a medical lithotripter, which includes the medical handle of Embodiment 1. A lithotripsy needle (not shown in the figure) is connected to the end of the rack 2 away from the connecting seat 6 on the medical handle. The connecting part 7 of the medical handle is a lithotripsy basket. The structure of the lithotripsy needle and the lithotripsy basket is in accordance with the prior art.

[0080] Working principle:

[0081] The medical handpiece is normally in its first working state, see [link / reference]. Figure 9 and Figure 10 In this working state, the first mating part 41, the second mating part 42, the third mating part 43 and the fourth mating part 44 respectively mesh with the rack 2, and the rack 2 is locked.

[0082] When switching to the second working state, rotate the operating part 55 clockwise to move the sliding member 53 downward. The extension 531 on the sliding member 53 pushes the second mating member 42 and the fourth mating member 44 downward, so that the second mating member 42 and the fourth mating member 44 disengage from the rack 2. Operate the handle body 31 to rotate counterclockwise around the first rotation axis r, which drives the first mating member 41 to rotate and slide and push the rack 2, so that the rack 2 moves forward along the axial direction of the rack 2. The third mating member 43 follows the rotation of the rack 2. When the handle body 31 is reset, the first mating member 41 is reset, and the third mating member 43 engages with the rack 2 to prevent the rack 2 from moving backward under the reaction force.

[0083] When switching to the third working state is required, rotate the operating part 55 counterclockwise. The medical handle switches to the first working state. Continue to rotate the operating part 55 counterclockwise, causing the sliding member 53 to move upward. The extension 531 on the sliding member 53 pushes the first mating member 41 and the third mating member 43 upward, causing the first mating member 41 and the third mating member 43 to disengage from the rack 2. Operate the handle body 31, causing the handle body 31 to rotate counterclockwise around the first rotation axis r, driving the second mating member 42 to rotate and slide, pushing the rack 2. This causes the rack 2 to retract along the axial direction of the rack 2, and the fourth mating member 44 follows the rotation of the rack 2. When the handle body 31 returns to its original position, the second mating member 42 returns to its original position, and the fourth mating member 44 engages with the rack 2, preventing the rack 2 from moving forward under the reaction force.

[0084] The present invention has been described in detail above, with the aim of enabling those skilled in the art to understand and implement the invention. However, this description should not be construed as limiting the scope of protection of the invention. All equivalent changes or modifications made in accordance with the spirit and essence of the invention should be included within the scope of protection of the invention.

Claims

1. A medical handle characterized by: The medical handle comprises: a housing; a rack slidingly arranged in the housing, the rack having teeth distributed on opposite sides thereof; a driving mechanism comprising a handle body movably arranged on the housing; a matching assembly comprising a first matching member and a second matching member configured to engage the opposite sides of the rack respectively, the first matching member and the second matching member being responsive to the handle body and generating engagement force on the rack capable of pushing the rack to move, the first matching member and the second matching member being opposite in the direction of the engagement force on the rack; a reversing mechanism operatively associated with the matching assembly to achieve engagement or disengagement of the matching assembly with the rack, the reversing mechanism comprising an operating member, an eccentric member having a central input shaft and an eccentric output shaft, and a sliding member, the operating member being in transmission connection with the central input shaft of the eccentric member, the sliding member being provided with a guide slot, the eccentric output shaft of the eccentric member being inserted in the guide slot, so that the sliding member can slide along a first direction and push the matching assembly to disengage the matching assembly with the rack; the medical handle has three working states, in a first working state, the first matching member and the second matching member are engaged with the rack respectively to lock the rack; in a second working state, the first matching member is engaged with the rack and the second matching member is disengaged with the rack, the first matching member being responsive to the handle body and pushing the rack to move forward; in a third working state, the second matching member is engaged with the rack and the first matching member is disengaged with the rack, the second matching member being responsive to the handle body and pushing the rack to move backward.

2. The medical handle of claim 1, wherein: the first matching member and the second matching member are rotatably arranged on the handle body, so that the first matching member and the second matching member rotate and slide relative to the housing.

3. The medical handle of claim 2, wherein: the first matching member and the second matching member are pawls, the pawls having a claw portion capable of extending into the teeth of the rack, when the pawls are responsive to the handle body, the pawls rotate and slide relative to the housing, so that the claw portion pushes the rack to move along the axial direction of the rack.

4. The medical handle of claim 1, wherein: the matching assembly further comprises a third matching member and a fourth matching member rotatably arranged on the housing, the third matching member and the fourth matching member being configured to engage the opposite sides of the rack respectively, the third matching member and the first matching member being arranged in the same direction, and the third matching member and the first matching member being engaged with or disengaged from the rack at the same time; the fourth matching member and the second matching member being arranged in the same direction, and the fourth matching member and the second matching member being engaged with or disengaged from the rack at the same time.

5. The medical handle of claim 4, wherein: the third matching member and the fourth matching member are pawls; and / or, The rotation shafts of the third and fourth engaging members are respectively provided with third and fourth torsion springs, one end of the third torsion spring is pressed on the third engaging member, and the other end is arranged on the shell, so that the third engaging member can rotate relative to the shell in response to the rack; one end of the fourth torsion spring is pressed on the fourth engaging member, and the other end is arranged on the shell, so that the fourth engaging member can rotate relative to the shell in response to the rack.

6. The medical handle of claim 1, wherein: The sliding member has an extension part capable of contacting the engaging assembly, the sliding member is respectively provided with a first through hole and a second through hole along a second direction and a third direction, the first direction, the second direction and the third direction are perpendicular to each other, the rack passes through and is partially arranged in the first through hole, the operating member passes through and is partially arranged in the second through hole, the first through hole and the second through hole respectively extend along the first direction, and the sliding member can move along the first direction and push the engaging assembly by rotating the operating member. And / or, The operating member passes through the eccentric member and protrudes from both sides of the shell, and the two ends of the operating member are provided with rotating rods for facilitating rotation operation.

7. The medical handle of claim 6, wherein: One side of the engaging assembly protrudes from the rack and extends outward, and the extension part is located between the side parts of the engaging members on the opposite sides.

8. The medical handle of claim 1, wherein: The medical handle further comprises a connecting seat connected to one end of the rack, and the connecting seat is capable of connecting one or more of a balloon inflator and a stone basket.

9. A medical lithotripter characterized by: The medical stone breaker comprises the medical handle according to any one of claims 1 to 8.

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