Pipe locking device

Abstract

The application discloses a pipe locking device for positioning a pipe in a medical instrument, which comprises a shell, clamping pieces which are movably arranged in the shell in pairs and have pipe passing channels between the clamping pieces, and the clamping pieces are provided with clamping portions matched with the contour shape of the pipe, and a driving piece which is movably arranged in the shell and is provided with a driving slope on the side facing the clamping pieces, and the driving piece pushes the clamping pieces to move towards each other to position the pipe when the driving piece moves. The pipe positioning and releasing are realized through the cooperation of the driving piece and the clamping pieces, the structure is simple and stable, the operation experience of the user can be effectively improved, and the treatment effect is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of medical equipment, in particular to a pipe locking device. BACKGROUND

[0002] The use of medical devices requires the cooperation of various components to achieve a certain function, especially during the interventional treatment process. The interventional device delivery system generally includes a sheath core assembly and a sheath tube slidingly sleeved outside the sheath core assembly, both of which constitute a sheath tube assembly and have a distal end that can enter the human body's vascular system and a proximal end that is connected to an operating handle. Based on the characteristics of the winding and tortuous human body vascular system and the consideration of remote operation, the direction of the distal end needs to be adjusted and controlled so that it can move to the target position. In order to achieve the above goal, the various pipes need to move or lock with each other at the appropriate time, and at the same time, the operating handle also needs to be driven. The operator, such as a clinician, needs to be able to meet the technical requirements of convenient holding, convenient adjustment, and accurate positioning when using the operating handle. SUMMARY

[0003] In order to solve the above technical problems, the present application discloses a pipe locking device for positioning the pipe in a medical device, comprising:

[0004] a housing;

[0005] a pair of clamping pieces movably installed in the housing, with a pipe passing channel between the same pair of clamping pieces, and a clamping part on the clamping piece matching the profile shape of the pipe;

[0006] a driving piece movably installed in the housing and provided with a driving slope on the side facing the clamping piece, the driving piece moving to push the same pair of clamping pieces to move towards each other to position the pipe through the driving slope.

[0007] The following also provides several optional modes, but not as an additional limitation to the above overall scheme, just a further supplement or preferred, without technical or logical contradiction, each optional mode can be combined with the above overall scheme, and can also be combined between multiple optional modes.

[0008] Optionally, the driving pieces are arranged in pairs, and the movement direction of each driving piece is perpendicular to the axial direction of the pipe, and the driving slopes of the same pair of driving pieces are arranged facing each other to drive the same pair of clamping pieces. Optionally, taking the center line of the pipe passing channel as a reference line, the distance between the driving slopes of the same pair of driving pieces at the reference line position is a fitting gap, and during the movement of the driving piece, the fitting gap changes to drive the same pair of clamping pieces to move towards each other or away from each other, and the pipe is clamped or released accordingly.

[0009] Optionally, the center line of the pipe penetrating passage extends in the X direction, the relative movement direction of the clamping members is the Y direction, the movement direction of the driving member is the Z direction, and the X direction, the Y direction and the Z direction form a spatial coordinate system in space.

[0010] Optionally, the X direction, the Y direction and the Z direction are perpendicular to each other.

[0011] Optionally, in the X direction, the driving slopes of the driving members form a first V shape after extending and intersecting, and the width change of the fitting gap corresponds to the extending trend of the first V shape when the driving members move in the same direction.

[0012] Optionally, in the Z direction, the driving slopes on the same driving member form a second V shape with the opening facing the pipe penetrating passage, and two sub-slopes are formed on both sides of the corner of the second V shape, and the clamping member corresponding to the driving member is located between the two sub-slopes.

[0013] Optionally, the two sub-slopes are smoothly connected.

[0014] Optionally, in the X direction, the fitting gap gradually increases and then gradually decreases, and the change trend corresponds to the extending trend of the second V shape.

[0015] Optionally, the shape of the outer circumferential surface of the clamping member matches the shape of the driving slope of the corresponding driving member.

[0016] Optionally, in the X direction, the clamping member and the corresponding driving slope are in line contact.

[0017] Optionally, in the Z direction, the driving member has a first movement direction to narrow the fitting gap and a second movement direction to widen the fitting gap, and a retaining member is arranged between the driving member and the housing to drive the driving member to the first movement direction.

[0018] Optionally, the driving member has a locking position for driving the clamping member to position the pipe and a release position for allowing the pipe to move,

[0019] The driving member comprises:

[0020] a sliding block movably mounted on the housing in the Z direction, and the side wall of the sliding block facing the pipe penetrating passage simultaneously provides the driving slope and the two sub-slopes;

[0021] a resilient member acting between the sliding block and the housing for retaining the driving member in the locking position;

[0022] an unlocking member movably mounted on the housing for driving the sliding block to enter the release position against the action of the resilient member.

[0023] Optionally, the retaining member is an elastic member arranged between the driving member and the housing, and the driving member is provided with a positioning chamber for accommodating at least a portion of the elastic member.

[0024] Optionally, each driving member is provided with at least two elastic members, and each elastic member is arranged in sequence in the axial direction of the pipe member.

[0025] Optionally, the unlocking member is a sliding block slidingly arranged on the housing, and the side surface of the sliding block is provided with a guide structure matched with the housing.

[0026] Optionally, the unlocking member is provided with an anti-extrusion edge for preventing the unlocking member from extruding out of the housing, and the housing is provided with a release area for avoiding the movement of the unlocking member.

[0027] Optionally, the housing is further provided with a driving cavity in communication with the release area, and the driving cavity is used for mounting the driving member.

[0028] Optionally, the pipe member has a plurality of pipe members arranged in a nested manner, one pair of clamping members and one pair of driving members form a locking assembly, and the pipe member locking device comprises at least two locking assemblies, and each locking assembly locks different pipe members.

[0029] Optionally, the housing is provided with a positioning structure matched with the clamping member, the clamping member is constrained in the positioning structure and can move within a predetermined range to clamp or release the pipe member.

[0030] Optionally, during the movement of the driving member, the driving member has a first movement direction for narrowing the matching gap and a second movement direction for widening the matching gap; the driving slopes of the same pair of driving members form a first V-shaped structure, and the driving slopes on the same driving member form a second V-shaped structure with the opening facing the pipe member threading passage; and the clamping member is driven by the first V-shaped structure and the second V-shaped structure to clamp or release the pipe member.

[0031] Optionally, the positioning structure comprises a positioning column arranged in the housing, the clamping member is matched with the positioning column through a mounting hole arranged on the clamping member, and the hole diameter of the mounting hole is greater than the outer diameter of the positioning column.

[0032] Optionally, the positioning structure further comprises a positioning baffle arranged on the outer periphery of the clamping member to constrain the limit position of the clamping member.

[0033] Optionally, the positioning baffle is provided with at least two positioning baffles arranged symmetrically, each positioning baffle is provided with a positioning hole for the positioning column to pass through, and the positioning baffle and the clamping member form the pipe member threading passage.

[0034] Optionally, the clamping member is columnar and concave in the middle part in the axial direction to form the clamping part.

[0035] Optionally, the clamping member is dumbbell-shaped.

[0036] Optionally, the clamping member is cylindrical and necked in the middle part in the axial direction to form the clamping part.

[0037] Optionally, the clamping member has a radial dimension slightly larger at one end than at the other end, and the outer circumferential generatrixes of the two ends are located on the same plane, which matches the driving slope of the corresponding side.

[0038] Optionally, the clamping member and the driving member are metal members.

[0039] Optionally, the housing and the pipe member are non-metal members.

[0040] Optionally, the pipe member is provided with an anti-wear structure at the matching part with the clamping part.

[0041] Optionally, the housing is further provided with a positioning sleeve, and the positioning sleeve is provided with an operation opening, and the operation opening is used to expose an unlocking member that causes the driving member to act.

[0042] Optionally, a pair of clamping members and a pair of driving members form a locking assembly, the pipe member locking device includes at least two locking assemblies, and the housing is provided with at least two operation openings corresponding to the driving members of each locking assembly.

[0043] Optionally, the driving member has a locking position for driving the clamping member to position the pipe member and a release position for allowing the pipe member to move, and the driving member further includes:

[0044] an unlocking member movably mounted on the housing and used to drive the driving member into the release position;

[0045] The operation opening is arranged as follows:

[0046] The unlocking member protrudes out of the operation opening; or

[0047] The operation opening is smaller in size than the unlocking member.

[0048] Optionally, the positioning sleeve is cylindrical and open at both ends.

[0049] Optionally, the housing is provided with a pipe member threading channel inside, and the pipe member threading channel is provided with positioning baffles on the upper and lower sides for mounting the clamping members, and the left and right sides of the pipe member threading channel are in communication with the driving cavities for mounting the driving members.

[0050] Optionally, in the axial direction of the pipe member, a separation plate is arranged between the positioning baffles and the housing.

[0051] Optionally, the housing is provided with at least two sets of locking components, and the locking components are separated by a partition plate.

[0052] This application also discloses an operating handle for driving multiple inner and outer nested pipes to move relative to each other, including a handle body and a pipe locking device according to the above technical solution; at least one of the pipes passes through the pipe threading channel of the pipe locking device and is constrained by the clamping member.

[0053] Optionally, the fitting locking device is fixed or slidably engaged with the operating handle.

[0054] Optionally, one of the adjacent inner and outer pipes is an inner pipe, and the other is an outer pipe. One of the inner pipe and the outer pipe is fixed to the housing of the pipe fitting locking device, and the other is constrained by the clamping members of the pipe fitting locking device. Optionally, the pipe fitting locking device is provided with at least two pairs of clamping members, which are used to position the inner pipe and the outer pipe respectively.

[0055] Optionally, at least three pipe fittings are provided, and at least two pipe fitting locking devices are provided. Any two adjacent pipe fittings are positioned against each other by the corresponding pipe fitting locking devices, and the pipe fitting locking devices are arranged sequentially along the axial direction of the pipe fittings.

[0056] Optionally, the handle body includes a support cylinder, the support cylinder having an operating window axially opened along the pipe fitting, and the pipe fitting locking device being slidably installed inside the support cylinder and having at least a portion exposed through the operating window.

[0057] The technical solution disclosed in this application achieves the positioning and release of the tube through the cooperation of the driving component and the clamping component. The structure is simple and stable, which can effectively improve the user's operating experience and enhance the treatment effect.

[0058] The specific beneficial technical effects will be further explained in the specific implementation methods in conjunction with the specific structures or steps. Attached Figure Description

[0059] Figure 1a This is a schematic diagram of a pipe fitting locking device in one embodiment;

[0060] Figure 1b for Figure 1a A schematic diagram of the internal structure of the pipe fitting locking device;

[0061] Figure 1c for Figure 1a A schematic diagram of the internal assembly structure of the pipe fitting locking device in the housing;

[0062] Figure 1d for Figure 1a A schematic diagram of the internal structure of the locking assembly of the pipe fitting locking device;

[0063] Figure 2a Structure diagram of driving member in one embodiment;

[0064] Figure 2b Structure diagram of driving member in one embodiment; Figure 2a

[0065] Structure diagram of driving member in one embodiment; Figure 2c Figure 2a Structure diagram of driving member in one embodiment;

[0066] Figure 3a Structure diagram of clamping member in one embodiment;

[0067] Figure 3b Figure 3a Structure diagram of clamping member in one embodiment;

[0068] Figure 3c Structure diagram of clamping member in one embodiment; Figure 3a

[0069] Structure diagram of clamping member in one embodiment; Figure 4

[0070] Structure diagram of locking assembly in one embodiment; Figure 5a

[0071] Structure diagram of housing in one embodiment; Figure 5b Figure 5a Structure diagram of housing in one embodiment;

[0072] Figure 5c Structure diagram of unlocking member in one embodiment;

[0073] Figure 6a Structure diagram of operating handle in one embodiment;

[0074] Figure 6b Figure 6a Structure diagram of operating handle in one embodiment;

[0075] Figure 6c Working state diagram of pipe locking device.

[0076] Reference signs in the drawings are explained as follows:

[0077] 1. Pipe;

[0078] 2. Pipe locking device;

[0079] 21. Housing; 213. Positioning baffle; 214. Positioning hole; 215. Release area; 217. Driving cavity; 218. Isolation plate;

[0080] 22. Clamping member; 221. Clamping part; 222. Mounting hole;​​​​

[0081] 23, pipe passing channel;

[0082] 24, driving member; 241, driving slope; 2411, sub-slope; 242, matching gap; 243, retaining member; 244, unlocking member; 245, positioning chamber; 246, guiding structure; 247, anti-escape edge;

[0083] 25, positioning sleeve; 251, operation port;

[0084] 3, operation handle; 31, supporting cylinder; 32, operation window. DETAILED DESCRIPTION

[0085] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.

[0086] It should be noted that when a component is referred to as being "connected" with another component, it can be directly connected with the other component or there can be a middle component. When a component is referred to as being "disposed on" another component, it can be directly disposed on the other component or there can be a middle component.

[0087] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used in the description of the application herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used in this description, the terms "and / or" includes any and all combinations of one or more of the associated listed items.

[0088] Reference will now be made to the drawings, wherein Figure 1a to the drawings, wherein Figure 5c The present application discloses a pipe locking device 2 for positioning a pipe 1 in a medical instrument, comprising:

[0089] a housing 21;

[0090] a pair of clamping members 22 movably mounted in the housing 21, with a pipe passing channel 23 between the same pair of clamping members 22, and a clamping portion 221 on the clamping members 22 matching the profile of the pipe 1;

[0091] a driving member 24 movably mounted in the housing 21 and provided with a driving slope 241 on the side facing the clamping members 22, the driving member 24 pushing the same pair of clamping members 22 to move towards each other through the driving slope 241 when the driving member 24 moves to position the pipe 1.

[0092] The mutual moving apart of the clamping pieces 22 widens the pipe penetrating passage 23, thereby releasing the pipe 1; and the mutual moving close of the clamping pieces 22 narrows the pipe penetrating passage 23, thereby clamping the pipe 1 to achieve positioning. The clamping part 221 is the part actually contacting the pipe 1, and the shape matching improves the clamping ability of the pipe 1, and improves the clamping effect and provides a structural basis for other functions. The movement of the clamping pieces 22 can be achieved by the movement of the driving piece 24. The driving piece 24 moves to cause the driving slope 241 to move relative to the clamping piece 22, thereby achieving the relative movement of the clamping piece 22. The driving slope 241 can achieve one or more of movement reversing, transmission ratio conversion, and self-locking of the position of the clamping piece 22.

[0093] The technical solution disclosed in the application achieves the positioning and release of the pipe 1 through the cooperation of the driving piece 24 and the clamping piece 22, has a simple and stable structure, can effectively improve the operation experience, and improves the convenience.

[0094] Reference is made to the accompanying drawings Figure 2a Reference is made to the accompanying drawings Figure 2c The setting details of the driving piece 24 are disclosed. In an embodiment, the driving piece 24 is arranged in pairs, and the movement direction of each driving piece 24 is perpendicular to the axial direction of the pipe 1. The driving slopes 241 of the driving pieces 24 in the same pair are arranged to face each other to drive the clamping pieces 22 in the same pair.

[0095] The driving piece 24 is arranged in pairs, and driving a pair of clamping pieces 22 has various actual forms, such as a pair of driving pieces 24 driving a single clamping piece 22, the clamping pieces 22 in the same pair being linked to each other; or each driving piece 24 driving a corresponding clamping piece 22, the driving pieces 24 being linked to each other or being independently triggered; and the like. The movement direction of the driving piece 24 is perpendicular to the axial direction of the pipe 1, which can avoid affecting the movement of the clamping piece 22. In the embodiment, the driving slope 241 at least plays a role in movement reversing, which can optimize the internal layout of the shell 21 while achieving a predetermined degree of movement isolation, and avoid the state mutation in the movement process of the driving piece 24 affecting the movement state of the clamping piece 22.

[0096] In Figure 4 In the embodiment, each driving piece 24 drives a corresponding clamping piece 22. In an embodiment, with the center line of the pipe penetrating passage 23 as a reference line, the distance between the driving slopes 241 in the same pair at the position of the reference line is a cooperation gap 242. In the movement process of the driving piece 24, the cooperation gap 242 changes to drive the clamping pieces 22 in the same pair to move towards each other or away from each other, thereby clamping or releasing the pipe 1.

[0097] The change of the engagement gap 242 is actually the change of the maximum distance allowed between the driving member 24 and the pair of clamping members 22, and the engagement gap 242 is adjusted when the driving member 24 moves by the driving slope 241.

[0098] For better understanding of the movement relationship of the driving member 24 and the components, referring to an embodiment, the center line of the pipe passing channel 23 extends in the X direction, the relative movement direction of the pair of clamping members 22 is the Y direction, and the movement direction of the driving member 24 is the Z direction, and the X direction, the Y direction and the Z direction constitute a spatial coordinate system. The directions constituting the spatial coordinate system should be understood as two of the three directions constituting a plane, and the remaining one direction is not coplanar with the plane. For better description of the movement relationship of the structures, see the indications in the accompanying drawings, and further, the X direction, the Y direction and the Z direction are perpendicular to each other. Figure 1d and Figure 4

[0099] Referring to the embodiment disclosed in the accompanying drawings, the driving slope 241 of the pair of driving members 24 intersects to form a first V shape in the X direction view, and the change of the width of the engagement gap 242 corresponds to the extension trend of the first V shape when the pair of driving members 24 move in the same direction. Figure 2b

[0100] The driving slope 241 of the pair of driving members 24 cooperates to form a first V shape, and in the process of relative movement of the driving member 24 and the pipe 1, the axis of the pipe 1 corresponds to different depths of the first V shape to obtain different engagement gaps 242, and finally realize the driving of the clamping member 22. Referring to the embodiment disclosed in the accompanying drawings, the driving slope 241 of the same driving member 24 forms a second V shape with the opening facing the pipe passing channel 242 in the Z direction view, and two auxiliary slopes 2411 are formed on both sides of the corner of the second V shape. The clamping member 22 corresponding to the driving member 24 is located between the two auxiliary slopes 2411. Figure 2c

[0101] The driving slope 241 on the same driving member 24 forms a second V shape through its two auxiliary slopes 2411, which serves to position and self-lock the clamping member 22. It is not difficult to understand that when the clamping member 22 realizes clamping of the pipe 1, the pipe 1 will generate an acting force on the clamping member 22 when it is stressed, which will cause the clamping member 22 to have a movement trend in the axial direction of the pipe 1, which will affect the cooperation effect of the driving member 24 and the clamping member 22. Of course, the above problem can be overcome by appropriate interaction of components, but it will increase the complexity of the components and improve the assembly precision. In this embodiment, the driving slope 241 forms a second V shape in the axial direction of the pipe 1 (i.e. the X direction) and forms two auxiliary slopes 2411, and the corresponding clamping member 22 is located between the two auxiliary slopes 2411 to realize positioning.

[0102] ​​​According to the above, the driving slope 241 is a composite slope in three-dimensional space and has three slopes, that is, in the axial direction of the clamping piece 22, it has a first slope that drives the clamping pieces 22 to approach each other, and in the axial direction of the pipe 1, it has a second slope and a third slope that keep the corresponding clamping pieces 22 in the middle of the driving slope 241. The second slope and the third slope constitute the two pairs of slopes 2411 mentioned above.

[0103] In the transition form of the two pairs of slopes, a smooth transition form can be used to reduce stress concentration. Alternatively, as shown in the drawings, line contact is achieved between the two pairs of slopes through a transition line. This setting can better achieve the positioning of the clamping piece on the driving piece, avoid the positioning ambiguity caused by smooth transition, and cause the clamping piece to move slightly on the driving piece. Two different settings can be flexibly adjusted according to different use conditions of the product. The pairs of slopes 2411 of the same pair of driving pieces 24 cooperate with each other to form a variable mating gap 242. In the X direction, the mating gap 242 gradually increases and then gradually decreases, and the change trend corresponds to the extension trend of the second V shape.

[0104] The above-mentioned second V shape can achieve the positioning and self-locking of the clamping piece 22, and the implementation principle of positioning is explained above. The following will explain how to achieve self-locking.

[0105] When the pipe 1 is positioned by the clamping piece 22, when the pipe 1 is subjected to an acting force to generate a movement trend, the clamping piece 22 will also generate a movement trend in the axial direction of the pipe 1, thus moving on the pair of slopes 2411, causing the mating gap 242 to change under different positions of the driving piece 24. The final effect is that the distance between the clamping pieces 22 has a trend of becoming smaller, further improving the positioning effect of the pipe 1, suppressing the movement trend of the pipe 1, and forming a negative feedback. In the use effect of the final product, when the pipe 1 is positioned, the stress of the pipe 1 will cause the positioning effect to be enhanced, thereby ensuring the stability of the positioning.

[0106] Further combined with the shape of the clamping part 221, the clamping part 22 can also have the effect of single degree of freedom locking. The shape of the clamping part 221 matches the shape of the pipe 1, and in the product, the shape of the clamping part 221 is a complementary circular arc to the outer periphery of the pipe 1, so the contact area with the pipe 1 is small. When the pipe 1 has an axial movement tendency, the clamping part 221 of the clamping part 22 will approach each other to increase the clamping torque to improve the locking effect, so the axial degree of freedom of the pipe 1 is locked. However, when the pipe 1 has a circumferential rotation movement tendency, the distance between the clamping part 221 of the clamping part 22 will not change, and because the contact area of the clamping part 221 with the pipe 1 is small, the locking torque is small, so the pipe 1 can be driven to rotate circumferentially by a small torque while being positioned by the clamping part 22, realizing the single degree of freedom locking effect mentioned above.

[0107] The movement effect locking effect of the clamping part 22 needs to be realized by the driving part 24. In addition to the above-mentioned several setting modes, the driving slope 241 and the clamping part 22 can also be set in various ways to realize the above-mentioned functions, but from the principle, both should meet: the shape of the outer periphery of the clamping part 22 matches the shape of the driving slope 241 of the corresponding driving part 24. From another angle, in an embodiment, the line contact between the clamping part 22 and the corresponding driving slope 241 is viewed along the X direction.

[0108] The above-mentioned working effect of the clamping part 22 needs to be realized by the stable working of the driving part 24. Referring to an embodiment, in the Z direction, the driving part 24 has a first movement direction that narrows the fitting gap 242, and a second movement direction that widens the fitting gap 242, and the driving part 24 and the housing 21 are provided with a retaining part 243 that drives the driving part 24 to the first movement direction.

[0109] The setting of the retaining part 243 can ensure the stability of the position of the driving part 24 itself under non-triggering conditions, thereby improving the locking effect of the clamping part 22 on the pipe 1. From the movement process of the driving part 24, the driving part 24 can be driven by the user directly, or referring to an embodiment, the driving part 24 has a locking position for driving the clamping part 22 to position the pipe 1 and a release position for allowing the pipe 1 to move, and the driving part 24 includes:

[0110] The sliding block, i.e. the body itself, is movably mounted in the Z direction on the housing 21, and the side wall of the sliding block towards the pipe passing-through passage 23 simultaneously provides the driving slope 241 and the two auxiliary slopes 2411; the elastic member acts between the sliding block and the housing 21, and is used to retain the driving part 24 in the locking position;

[0111] The unlocking member 244 is movably mounted on the housing 21 and is used to drive the sliding block (i.e. the body of the driving member 24) to overcome the action of the elastic member (i.e. the retaining member 243) and enter the release position.

[0112] As described above, the elastic member acting as the retaining member 243 can ensure the stability of the position of the driving member 24 in the untriggered state, thereby improving the locking effect of the clamping member 22 on the pipe 1. The unlocking member 244 can improve the operation feeling of the user and facilitate the layout of the product structure. More importantly, the unlocking member 244 can facilitate the linkage of the driving member 24 or the clamping member 22.

[0113] In the mounting details of the retaining member 243, in an embodiment, the retaining member 243 is an elastic member arranged between the driving member 24 and the housing 21, and the driving member 24 is provided with a positioning chamber 245 for accommodating at least a part of the elastic member.

[0114] The elastic member can be a deformable rubber, a coil spring or the like. The positioning chamber 245 is used to facilitate the assembly of the retaining member 243, improve the assembly effect of the retaining member 243 and the driving member 24, and improve the movement stroke of the driving member 24 under the condition that the internal volume of the housing 21 is predetermined.

[0115] Further, each driving member 24 is provided with at least two elastic members, and each elastic member is arranged in sequence in the axial direction of the pipe 1. The arrangement in this embodiment realizes the stability of each position of the driving member 24 through the redundant arrangement of the retaining member 243. In particular, when the clamping member 22 has a movement trend due to the movement of the pipe 1, it may cause the positioning of the driving member 24 to deviate, thereby affecting the positioning effect. When the retaining member 243 is arranged in sequence in the axial direction of the pipe 1, the above problem can be well overcome.

[0116] In the arrangement details of the unlocking member 244, in an embodiment, the unlocking member 244 is a sliding block movably mounted on the housing 21, and the side surface of the sliding block is provided with a guide structure 246 matched with the housing 21.

[0117] The sliding block matched with the guide structure 246 can simplify the matching relationship of the components while ensuring the stability of the movement, thereby facilitating the assembly. The guide structure 246 can adopt the form of a guide groove matched with each other, which can provide limiting while guiding. In an embodiment, the unlocking member 244 is provided with an anti-extrusion edge 247 for preventing the unlocking member 244 from being extruded out of the housing 21, and the housing 21 is provided with a release area 215 for avoiding the movement of the unlocking member 244.

[0118] The anti-extrusion edge 247 can further improve the limiting effect and improve the stability of the action of the unlocking member 244.

[0119] The anti-edge-off 247 can be used in other structures. For example, when the unlocking member 244 moves away from the clamping member 22, the anti-edge-off 247 can abut against the shell 21 or the corresponding structure to limit the movement, or when the unlocking member 244 moves towards the clamping member 22, the anti-edge-off 247 can abut against the driving member 24 or the corresponding structure to drive the movement, and at this time, the cavity in the shell 21 needs to meet the predetermined spatial relationship. In an embodiment, the shell 21 further comprises a driving cavity 217 in communication with the release area 215, and the driving cavity 217 is used to install the driving member 24. The arrangement in this embodiment can effectively improve the utilization of components, facilitate spatial arrangement, and facilitate the miniaturization of the pipe locking device 2, thereby providing a structural basis for overall height integration.

[0120] The above mainly introduces how the driving member 24 and the clamping member 22 cooperate to lock the pipe 1 in the pipe locking device 2, but in the medical instrument field, the pipe 1 is often provided with multiple pipes. In an embodiment, the pipe 1 has multiple pipes arranged in a nested manner, one pair of clamping members 22 and one pair of driving members 24 form a locking assembly, and the pipe locking device 2 comprises at least two locking assemblies, and each locking assembly locks a different pipe 1.

[0121] The two locking assemblies lock different pipes 1, which can perform different operations on the pipes 1. The operation can be to drive the pipe 1 by releasing the locking assembly, or to position the pipe 1 and the pipe locking device 2 by locking the assembly, and to drive the pipe 1 by driving the pipe locking device 2. Different use modes of the pipe locking device provide rich choices for the arrangement mode of the medical instrument.

[0122] Reference is made to the accompanying drawings Figure 3a Reference is made to the accompanying drawings Figure 3c The setting details of the clamping member 22 are disclosed.

[0123] In an embodiment, the shell 21 is provided with a positioning structure cooperating with the clamping member 22, and the clamping member 22 is constrained in the positioning structure and can move within a predetermined range to clamp or release the pipe 1.

[0124] The operation of the clamping member 22 is closely related to the movement of the driving member 24. During the movement of the driving member 24, the driving member 24 has a first movement direction to narrow the cooperation gap 242, and a second movement direction to widen the cooperation gap 242; the first V-shaped surface cooperates with the driving slope 241 of the driving member 24 to form a first V-shaped surface, and the second V-shaped surface on the same driving member 24 has an opening facing the pipe passing channel 242, and the clamping member 22 is driven by the first V-shaped surface and the second V-shaped surface to clamp or release the pipe 1.

[0125] The positioning structure can realize the installation of the clamping piece 22 while allowing the movement of the clamping piece 22. In terms of structure, a deformable mounting piece can be used to realize this, and the movement of the clamping piece 22 is released through the deformation of the deformable mounting piece. Alternatively, a clearance fit can be used. In an embodiment, the positioning structure includes a positioning column (not shown in the figure) arranged in the housing 21, and the clamping piece 22 is fitted with the positioning column through a mounting hole 222 arranged thereon, the hole diameter of the mounting hole 222 being greater than the outer diameter of the positioning column.

[0126] The clearance-fitted mounting hole 222 and the positioning column can provide a stable assembly relationship while providing multiple degrees of freedom for the clamping piece 22, including but not limited to translation in multiple directions, rotation in multiple directions, and superposition of the two movements. The specific size difference between the mounting hole 222 and the positioning column can be adjusted according to the required movement stroke of the clamping piece 22.

[0127] In addition to the constraint of the positioning column, the clamping piece 22 can also be provided with a protection structure for limiting the position during movement. In an embodiment, the positioning structure further includes a positioning baffle 213 arranged on the outer periphery of the clamping piece 22 to constrain the limiting position of the clamping piece 22.

[0128] The positioning baffle 213 can constrain the limiting position without interfering with the movement of the clamping piece 22, prevent the failure of the clamping piece 22 constraint, and reduce the mechanical requirements of the positioning column. At the same time, the positioning baffle 213 can also provide a relatively closed movement space for the clamping piece 22 in the case of a larger size, avoid the influence of foreign matter on the movement effect of the clamping piece 22, and ensure the response degree of the pipe fitting 1 release and positioning.

[0129] In terms of structure, the positioning baffle 213 is generally connected to the inner side wall of the housing 21 for stable arrangement, and therefore the positioning baffle 213 can also serve as a fixed point for other components. In an embodiment, the positioning baffle 213 is provided with at least two and symmetrically arranged, and each positioning baffle 213 is provided with a positioning hole 214 for the positioning column to pass through, and the pipe fitting 1 passes through between the positioning baffles 213.

[0130] The arrangement in the embodiment not only facilitates the installation of the positioning column, but also provides a predetermined sealing effect for the pipe fitting passing channel 23, avoiding the interference of the movement of multiple components with the movement of the pipe fitting 1. From another perspective, the positioning baffle 213 and the clamping piece 22 form the pipe fitting passing channel 23.

[0131] Therefore, in the embodiment, the predetermined range in the description "the clamping piece is constrained in the positioning structure and can move within a predetermined range" represents the constraint of the positioning column and the positioning baffle. Referring to the accompanying drawings, Figure 4 and the accompanying drawings, Figure 5aIn the Z direction, the predetermined range of the clamping piece is the gap between the two positioning baffle plates 213, and in the X and Y directions, the predetermined range of the clamping piece is the matching gap between the positioning column and the mounting hole 222.

[0132] In a specific form of the clamping piece 22, in an embodiment, the clamping piece 22 is columnar and concave in the middle in the axial direction to form a clamping portion 221.

[0133] The columnar structure of the clamping piece 22 can better adapt to the driving effect of the driving slope 241, and at the same time, the columnar form can provide a larger contact area through the extension of its own axial direction to ensure the stability of the position of the clamping piece 22. The clamping portion 221 formed by the concave middle part can better position the pipe fitting 1 under the condition of matching the shape of the pipe fitting 1, and avoid the case that the movement of the pipe fitting 1 causes positioning failure.

[0134] In a specific product, the columnar shape of the clamping piece 22 can be further optimized. In an embodiment, the clamping piece 22 is cylindrical and necked in the middle in the axial direction to form a clamping portion 221.

[0135] The cylindrical structure can allow itself to rotate in the axial direction, providing a structural basis for other functions, while providing a larger outer peripheral area under the premise of determining the volume and meeting the function of clamping the pipe fitting 1, and achieving better cooperation effect with the driving slope 241. From the overall form, the clamping piece 22 is dumbbell-shaped. Referring to the drawings, the clamping piece 22 is dumbbell-shaped with enlarged ends, or dog bone-shaped. In the transition between the middle concave part and the two enlarged parts, it can be set in the manner shown in the drawings to avoid the pipe fitting from coming out of the clamping portion of the concave part; it can also be set as a smooth transition of a circular arc to reduce damage to the pipe fitting or surrounding components during the movement of the clamping piece; the specific setting can be flexible according to the material of the surrounding components and the setting parameters of the pipe fitting locking device.

[0136] In general product design, the movement of components will remain straight to facilitate internal layout, so the mutual cooperation of the driving slope 241 with the components may have an impact. The problem can be overcome by adjusting the movement direction of the driving member 24, but this will affect the compactness of the internal layout of the pipe fitting locking device 2. In an embodiment, the radial dimension of one end of the clamping piece 22 is slightly larger than that of the other end, and the outer peripheral generatrix of the two ends is located on the same plane, which matches the driving slope of the corresponding side.

[0137] The scheme in this embodiment takes into account the above seemingly irreconcilable contradictions by optimizing the outer peripheral shape of the clamping piece 22, and at the same time, the unequal setting of the two ends can realize the movement trend of the clamping piece 22 on the driving slope 241, thereby improving the positioning effect on the pipe fitting 1.

[0138] From the above description, it can be seen that the positioning effect of the pipe 1 depends on the actual cooperation effect among the clamping member 22, the driving member 24, and the pipe 1. In addition to the cooperation gap, tolerance, and other size parameters mentioned above, the cooperation effect also relates to the material setting of each component.

[0139] In an embodiment, the clamping member 22 is a metal member. The metal material can provide better structural strength and wear resistance. Similarly, the driving member 22 is also a metal member. In actual products, in order to achieve a complex configuration, the housing 1 and the pipe 1 are often set as non-metal members. Similarly, the pipe 1 is also a non-metal member. The pipe 1 as a non-metal material can release the displacement of the clamping member 22 through its own deformation, thereby better achieving the clamping effect.

[0140] In terms of product stability, the pipe 1 and the clamping member 22 cooperation part are provided with an anti-wear structure. The anti-wear structure has various forms of expression, such as setting an anti-wear coating or a lubricating coating on the outer peripheral surface of the pipe 1; for example, increasing the wall thickness of the pipe 1 at the corresponding position; for example, the pipe 1 is sleeved with a sleeve for cooperation with the clamping member at the corresponding position, and the like.

[0141] In the product, the housing 21 needs to process a complex cavity, and also needs to ensure strength while having a good product appearance, so the cost is relatively high. The structural function and appearance function can be appropriately separated to facilitate production and assembly. In an embodiment, the housing 21 is further covered with a positioning sleeve 25, and the positioning sleeve 25 is provided with an operation port 251. The operation port 251 is used to expose the unlocking member 244 that causes the driving member 24 to act.

[0142] The positioning sleeve 25 can provide the operation port 251 for the unlocking member 244 or the driving member 24 while providing a good appearance. The number of operation ports 251 can be adjusted according to different settings of the pipe locking device 2. In an embodiment, a pair of clamping members 22 and a pair of driving members 24 form a locking assembly, the pipe locking device 2 includes at least two locking assemblies, and the housing 21 is provided with at least two operation ports 251 corresponding to the driving members 24 of each locking assembly.

[0143] Different operation ports 251 can also be distinguished and set. In an embodiment, the driving member 24 has a locking position for driving the clamping member 22 to position the pipe 1 and a release position for allowing the pipe 1 to move. The driving member 24 further includes:

[0144] an unlocking member 244 movably mounted on the housing 21, used to drive the driving member 24 to enter the release position;

[0145] The operation port 251 is set as follows:

[0146] The unlocking member 244 protrudes out of the operation port 251; or

[0147] The operation port 251 is smaller than the unlocking piece 244.

[0148] Different settings of the operation port 251 can achieve different design purposes. For example Figure 1a The operation port 251 is set in the lower middle, and the unlocking piece 244 protrudes out of the operation port 251, which can facilitate the user to operate the unlocking piece 244; for example Figure 1a The operation port 251 is set in the upper middle, and the size of the operation port 251 is smaller than the unlocking piece 244, which can avoid the user from misoperating the unlocking piece 244, but when it is needed in actual use, it can also be quickly operated through a suitable tool. Therefore, the operation port 251 can provide guidance and limiting while also providing a structural basis for other functions.

[0149] From the overall shape of the shell 21, with reference to an embodiment, the positioning sleeve 25 is cylindrical and open at both ends. The positioning sleeve 25 open at both ends in the X direction facilitates the assembly of the shell 21, and also facilitates the pipe 1 to pass through the shell 21 to complete the function of the pipe locking device 2.

[0150] In terms of internal chamber distribution, with reference to an embodiment, the pipe passing channel 23 is arranged inside the shell 21, and positioning baffles 213 for installing clamping pieces 22 are arranged on the upper and lower sides of the pipe passing channel 23. The left and right sides of the pipe passing channel 23 are in communication with the driving cavities 217, and the driving cavities 217 are used to install the driving pieces 24.

[0151] Installing multiple sets of locking assemblies in the shell 21 will cause the movement relationship of the components to be complex, so with reference to an embodiment, a partition plate 218 is arranged between the positioning baffles 213 and the shell 21 in the axial direction of the pipe 1 (i.e. in the X direction). Further, at least two sets of locking assemblies are arranged in the shell 21, and the locking assemblies are separated by the partition plate 218.

[0152] In the embodiment shown in the drawings, in addition to the reinforcing effect mentioned above, the partition plate 218 can also provide isolation between different locking assemblies, ensuring the stability of the movement of each component while ensuring the compact layout of the pipe locking device 2, avoiding the problem that opening too many cavities on the shell 21 will cause the structural strength of the shell 21 to decrease.

[0153] Therefore, with reference to an embodiment, a reinforcing rib plate 218 is arranged between the positioning baffles 213 and the shell 21 in the axial direction of the pipe 1. In the embodiment shown in the drawings, in addition to the reinforcing effect mentioned above, the reinforcing rib plate 218 can also provide isolation between different locking assemblies, ensuring the stability of the movement of each component while ensuring the compact layout of the pipe locking device 2.

[0154] With reference to Figures 6a to 6cThe application also discloses an operating handle 3 for driving the mutual movement of the plurality of inner-outer sequentially nested pipe fittings 1, which comprises a handle body and the pipe fitting locking device 2 according to the above technical solution; at least one of the pipe fittings 1 is arranged in the pipe fitting passing channel 23 of the pipe fitting locking device 2 and is constrained by the clamping piece 22. The locking of the pipe fittings 1 by the pipe fitting locking device 2 is described in detail above, and will not be repeated here. The operating handle 3 realizes the locking of the pipe fittings 1 through the pipe fitting locking device 2, thereby realizing the operation of the specific pipe fitting 1. The operation can be realized by releasing the locking assembly to drive the pipe fitting 1, or by positioning the pipe fitting 1 and the pipe fitting locking device 2 through the locking assembly and driving the pipe fitting 1 through the pipe fitting locking device 2. Different use modes of the pipe fitting 1 provide rich choices for the arrangement mode of the medical instrument. In an embodiment, the pipe fitting locking device 2 is fixed or slidingly matched with the operating handle 3.

[0155] For convenience of description, any one of the inner-outer adjacent pipe fittings 1 is an inner pipe, and the other is an outer pipe. Different arrangement modes can be adopted according to the use needs of different pipe fittings 1, for example, referring to the operating handle shown in FIG. 8, the operating handle 3 comprises an outer pipe and an inner pipe, and at the distal end of the operating handle, the pipe fittings 1 can be selected to be directly fixed to the operating handle 3. Figure 6a For example, referring to FIG. 9, the pipe fittings 1 can be selected to be directly fixed to the movable part of the operating handle 3, and the movable part is axially moved through the driving mechanism on the operating handle 3, for example, through screw rotation. Figure 6b For example, referring to FIG. 10, the pipe fittings 1 can be selected to be directly fixed to the movable part of the operating handle 3, and the movable part is axially moved through the driving mechanism on the operating handle 3, for example, through screw rotation. Figure 6c For example, referring to FIG. 11, in an embodiment, the pipe fitting locking device 2 is provided with at least two pairs of clamping pieces 22, and is respectively used for positioning the inner pipe and the outer pipe. Figure 6b For example, referring to FIG. 12, one of the inner pipe and the outer pipe is fixed with the housing 21 of the pipe fitting locking device 2, and the other is constrained by the clamping piece 22 of the pipe fitting locking device 2, and the like. In the scheme of the plurality of pipe fittings 1, the arrangement of the pipe fitting locking device 2 is more flexible. In an embodiment, the pipe fittings 1 are provided with at least three, and the pipe fitting locking device 2 is provided with at least two, and any two adjacent pipe fittings 1 are positioned by the corresponding pipe fitting locking device 2, and the pipe fitting locking devices 2 are sequentially arranged in the axial direction (i.e., the X direction) of the pipe fittings 1.

[0156] In the embodiment, the sequential arrangement of the pipe fitting locking device 2 in the axial direction can realize the locking of the pipe fittings 1 at any position, which is convenient to operate, and the movement of the pipe fittings 1 can share the same movement stroke on the operating handle 3, which has a positive significance for the compact arrangement of the operating handle 3.

[0157] Further, the handle body comprises a supporting cylinder 31, the supporting cylinder 31 is provided with an operation window 32 opened along the axial direction of the pipe 1, and the pipe locking device 2 is slidingly installed in the supporting cylinder 31 and at least a part of the pipe locking device 2 is exposed to the operation window 32. The supporting cylinder 31 can provide guidance for the movement of the pipe locking device 2, so as to facilitate the user to quickly operate each pipe locking device 2 to drive the pipe 1, and also facilitate the exposure of the unlocking button of the pipe locking device, and improve the implementation effect of interventional therapy.

[0158] As described above with respect to different pipe 1 locking modes, the actual mode of each pipe 1 can also be set respectively. For example, referring to the drawings, the pipe 1 can be moved axially relative to the operating handle 3 by thread cooperation on the operating handle 3, or the pipe 1 can be moved by operating the pipe locking device 2 after being locked by the pipe locking device 2. Different operation modes of the pipe 1 are mainly to adapt to different use requirements to meet different treatment effects.

[0159] The technical features of the above-described embodiments can be combined arbitrarily. To make the description concise, all possible combinations of the technical features in the above-described embodiments are not described, however, as long as the combinations of the technical features do not exist contradictory, they should be considered as the scope disclosed in the present specification. When the technical features in different embodiments are embodied in the same drawing, it can be considered that the drawing also discloses the combination of each embodiment involved.

[0160] The above-described embodiments only express several implementation manners of the present application, and the description is relatively specific and detailed, but it should not be understood as a limitation on the patent application scope. It should be noted that for ordinary skilled in the art, without departing from the concept of the present application, several modifications and improvements can be made, which are within the protection scope of the present application.

Claims

1. A fitting locking device for positioning fittings in medical devices, characterized in that, include: case; Clamping members are installed in pairs and movably within the housing. Between the pair of clamping members is a tube insertion channel. Each clamping member has a clamping portion that matches the contour shape of the tube. The clamping member is cylindrical and has a recessed center in the axial direction to form the clamping portion. The cylindrical structure of the clamping member allows it to rotate. The driving components are arranged in pairs and movably installed inside the housing, and have a driving ramp on the side facing the clamping component. When the driving components move, they push the pair of clamping components to move towards each other through the driving ramp to position the pipe. The centerline of the pipe fitting insertion channel extends in the X direction, the relative movement direction of the same pair of clamping members is in the Y direction, the movement direction of the driving member is in the Z direction, and the X, Y, and Z directions form a spatial coordinate system in space. From the perspective of the X direction, the driving ramps of the same pair of driving components roughly form a first V-shape after they extend and intersect. When the same pair of driving components move in the same direction, the width of the mating clearance changes accordingly with the extension trend of the first V-shape. From the perspective of the Z direction, the driving ramp on the same driving component is a second V-shape with the opening facing the pipe insertion channel. Two secondary ramps are formed on both sides of the corner of the second V-shape, and the clamping component corresponding to the driving component is located between the two secondary ramps.

2. The pipe fitting locking device according to claim 1, characterized in that, The housing is provided with a positioning structure that cooperates with the clamping member. The clamping member is constrained within the positioning structure and can move within a predetermined range to clamp or release the pipe.

3. The pipe fitting locking device according to claim 2, characterized in that, The positioning structure includes a positioning post disposed within the housing, and the clamping member engages with the positioning post through a mounting hole disposed on itself.

4. The pipe fitting locking device according to claim 3, characterized in that, The diameter of the mounting hole is larger than the outer diameter of the positioning post.

5. The pipe fitting locking device according to claim 1, characterized in that, The clamping element is dumbbell-shaped.

6. The pipe fitting locking device according to claim 1, characterized in that, The movement direction of each driving component is perpendicular to the axial direction of the pipe, and the driving inclined surfaces of the same pair of driving components are arranged facing each other to drive the same pair of clamping components.

7. The pipe fitting locking device according to claim 6, characterized in that, Using the center line of the pipe insertion channel as a reference line, the distance between the driving inclined surfaces of the same pair at the reference line position is the fitting clearance. During the movement of the driving component, the fitting clearance changes to drive the same pair of clamping components to move towards or away from each other, thereby clamping or releasing the pipe accordingly.

8. The pipe fitting locking device according to claim 1, characterized in that, In the X direction, the mating gap gradually increases and then gradually decreases, and the trend of change corresponds to the extension trend of the second V-shape.

9. The pipe fitting locking device according to claim 8, characterized in that, In the Z direction, the drive member has a first movement direction that narrows the mating gap and a second movement direction that widens the mating gap, and a retaining member is provided between the drive member and the housing to drive the drive member in the first movement direction.

10. The pipe fitting locking device according to claim 7, characterized in that, The driving member has a locking position for driving the clamping member to position the pipe and a releasing position for allowing the pipe to move. The driving member includes: A sliding block is movably mounted on the housing along the Z direction, and the sliding block provides the driving inclined surface and two secondary inclined surfaces on the side wall facing the pipe insertion channel; An elastic element, disposed between the sliding block and the housing, is used to hold the drive element in the locked position; An unlocking element, movably mounted on the housing, is used to drive the sliding block to overcome the action of the elastic element and enter the release position.

11. The pipe fitting locking device according to claim 1, characterized in that, The pipe fitting has multiple pipes nested together. A pair of clamping members and a pair of driving members form a locking assembly. The pipe fitting locking device includes at least two sets of locking assemblies, each locking assembly locking a different pipe fitting.

12. The pipe fitting locking device according to claim 1, characterized in that, The housing is also covered by a positioning sleeve, which has an operating port for exposing the unlocking component that causes the drive component to move.

13. The pipe fitting locking device according to claim 12, characterized in that, A pair of clamping members and a pair of driving members form a locking assembly. The pipe locking device includes at least two sets of locking assemblies. The housing is provided with at least two operating ports, each corresponding to a driving member of the locking assembly.

14. The pipe fitting locking device according to claim 1, characterized in that, The housing is cylindrical in shape and has a through-hole for the pipe fitting. The upper and lower sides of the through-hole are provided with positioning baffles for installing the clamping component. The left and right sides of the through-hole are connected to the drive cavity, which is used to install the drive component.

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