CN113349845A

CN113349845A - Locking device

Info

Publication number: CN113349845A
Application number: CN202110535683.0A
Authority: CN
Inventors: 王建兵; 阙诗昊; 徐军; 林林
Original assignee: Shanghai Huihe Healthcare Technology Co Ltd
Current assignee: Shanghai Huihe Healthcare Technology Co Ltd
Priority date: 2021-05-17
Filing date: 2021-05-17
Publication date: 2021-09-07
Anticipated expiration: 2041-05-17
Also published as: CN113349845B

Abstract

The application provides a locking device for compressing tightly act as go-between, this locking device includes: a first locking member; the second locking piece is matched and connected with the first locking piece; the pressing piece is used for pressing the pull wire; a passage for passing the wire; the first locking piece is controlled to be matched and locked with the second locking piece, so that the pressing piece moves along the first direction, and the pull wire is pressed in the channel. The locking device can ensure that the stay wire is locked more firmly, and the operations of locking the stay wire and adjusting the position of the stay wire are simpler.

Description

Locking device

Technical Field

The embodiment of the application relates to the technical field of medical instruments, in particular to a locking device for compressing a stay wire.

Background

Minimally invasive and interventional procedures are becoming more common, and in some instances it is desirable to lock the pull wire, for example, in surgical instruments where it is often desirable to lock a metal pull wire to a sheath or other component.

The existing stay wire locking device adopts a spring to extrude a pin shaft as shown in figures 1 and 2, so that the pin shaft compresses a metal stay wire. However, the force exerted by the spring of such a wire locking device is limited, and thus the locking force provided to the wire is small. In addition, when the stay wire needs to be installed and the position of the stay wire needs to be adjusted in the operation process, the pin shafts need to be adjusted on two sides, the requirement on assembly operation is high, the reliability of the device is poor, and the risk of failure is caused.

Therefore, a pull-cord locking device with a large pull-cord locking force and high reliability is needed.

Disclosure of Invention

In view of the above, the present application provides a locking device to overcome or at least partially solve the above problems.

The embodiment of the application provides a locking device for compressing tightly acting as go-between, and this locking device includes: a first locking member; the second locking piece is matched and connected with the first locking piece; the pressing piece is used for pressing the pull wire; a passage for passing the wire; the first locking piece is controlled to be matched and locked with the second locking piece, so that the pressing piece moves along the first direction, and the pull wire is pressed in the channel.

Optionally, the channel includes a buffer chamber formed by the compression member and the first inner wall of the second locking member to limit shear forces on the pull wire when the compression member compresses the pull wire.

Optionally, the size of the compression member is smaller than the size of the first locking member.

Optionally, the channel includes a recessed area formed by the first inner wall and the second inner wall of the second retaining member to compress the pull wire in the recessed area.

Optionally, the channel includes a first through-hole extending axially through the second retaining member.

Optionally, the second locking member is further provided with a second through hole penetrating through the second locking member along the second direction, and the second through hole is used for penetrating through the pressing member and enabling the pressing member to move along the first direction.

Optionally, the compression member has a projection and the second locking member has a recess, and the channel includes an area formed by the projection and the recess.

Optionally, a surface of the pressing member facing the pull wire is a flat surface or an arc surface, and a surface of the second inner wall is a flat surface.

Optionally, the first locking member is threadedly coupled to the second locking member.

Optionally, the pressing member and the first locking member are fixedly connected or non-fixedly connected.

According to the technical scheme, the locking device disclosed by the embodiment of the application has the advantages that the first locking piece and the second locking piece are matched for locking, the first locking piece can force the pressing piece to move along the first direction in the locking process, the pull wire is pressed in the channel, and the pull wire is locked more firmly.

Secondly, compared with the prior art shown in fig. 1-2, under the condition that the second locking member is fixed, the locking of the pull wire can be realized only by adjusting the first locking member, and the operations of locking the pull wire and adjusting the position of the pull wire are simpler.

In addition, a buffer chamber is arranged in the channel to limit the shearing force of the pressing piece on the pull wire when the pressing piece presses the pull wire, so that the probability that the pull wire is cut off in the operation process is reduced.

Again, the design of the recessed area may further provide a buffer space for the pull cord, thereby further reducing the chance of the pull cord being severed during operation.

Drawings

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments described in the embodiments of the present application, and other drawings can be obtained by those skilled in the art according to the drawings.

FIG. 1 is a side view of a prior art locking device;

FIG. 2 is a perspective view of the locking device shown in FIG. 1;

FIG. 3A is a perspective view of a first embodiment of a locking device of the present application;

FIG. 3B is a cross-sectional view of the locking device shown in FIG. 3A;

FIG. 3C is a perspective view of a second retaining member of the retaining device shown in FIG. 3A;

FIG. 3D is a perspective view of a first retaining member of the retaining device shown in FIG. 3A;

FIG. 4A is a perspective view of a second embodiment of a locking device of the present application;

FIG. 4B is a cross-sectional view of the locking device shown in FIG. 4A;

FIG. 4C is a perspective view of a second retaining member of the retaining device shown in FIG. 4A;

FIG. 5A is a perspective view of a third embodiment of a locking device of the present application;

FIG. 5B is a cross-sectional view of the locking device shown in FIG. 5A;

FIG. 5C is a perspective view of a second retaining member of the retaining device shown in FIG. 5A;

FIG. 6A is a perspective view of a fourth embodiment of a locking device of the present application;

FIG. 6B is a side view of the locking device shown in FIG. 6A;

fig. 6C is an exploded view of the locking device shown in fig. 6A.

Element number

10: a locking device; 101: a first locking member; 102: a second locking member; 103: a compression member; 104: a pull wire; 110: a channel; 107: a cavity; 108: a buffer chamber; 109: a recessed region; 105: a first through hole; 106: a second through hole; 111: a first inner wall; 112: a second inner wall; 1031: a side wall.

Detailed Description

In order to make those skilled in the art better understand the technical solutions in the embodiments of the present application, the technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, but not all embodiments. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments in the present application shall fall within the scope of the protection of the embodiments in the present application.

The term "fixedly connected" means that the two parts are independent of each other but fixedly connected by means of a specific fixing element, or that the two parts are integrally formed. The term "non-fixed connection" refers to a state in which two components are movably connected or separated from each other independently.

The terms "upper" and "lower" refer to the relative orientations of "upper" and "lower" as viewed in the plane of the page.

The following further describes specific implementations of embodiments of the present application with reference to the drawings of the embodiments of the present application.

Referring to fig. 3A-6C, in one particular implementation of the present application, a locking device 10 is provided that includes: a first locking member 101; a second locking member 102, which is connected with the first locking member 101 in a matching way; a pressing member 103 for pressing the pulling wire 104; a passage 110 for passing through the pull wire 104; wherein, the first locking member 101 is controlled to cooperate with the second locking member 102 to move the pressing member 103 along the first direction, so as to press the pulling wire 104 into the channel 110, thereby the pulling wire 104 is firmly locked.

The first direction may be perpendicular to or at an angle to the extension direction of the pulling wire 104 to facilitate the pressing member 103 to press the pulling wire 104. First retaining member 101 and second retaining member 102 can be in threaded connection, as shown in fig. 3A-6C, first retaining member 101 can have external threads and second retaining member 102 can have internal threads, and first retaining member 101 and second retaining member 102 can be rotated relative to each other to retain first retaining member 101 and second retaining member 102 relative to each other. However, the configuration of first locking member 101 and second locking member 102 is not limited thereto, and may be any other suitable configuration that satisfies a mating connection.

Compared with the prior art shown in fig. 1-2, in the case that the second locking member 102 is fixed, the locking of the pulling wire can be realized only by adjusting the first locking member 101, for example, by rotating the first locking member 101 clockwise or counterclockwise with two fingers, so that the locking or unlocking of the first locking member 101 and the second locking member 102 can be realized, and the operations of locking the pulling wire 104 and adjusting the position of the pulling wire 104 are simpler. Whereas the prior art requires pulling the pin from both sides and pulling it back when adjusting 104.

The interior of the second locker 102 may be provided with a cavity 107 for receiving the first locker 101 and locking the first locker 101 therein, and the pressing member 103 may be located below the second locker 102.

The passage 110 may include a buffer chamber 108 formed by the side wall 1031 of the pressing member 103 and the first inner wall 111 of the second locker 102 to limit a shearing force to the wire 104 when the pressing member 103 presses the wire 104. The buffer chamber 108 is formed to prevent the pulling wire 104 from being broken due to the pressing of the pressing member 103 and the second locker 102 to the pulling wire 104.

In an embodiment of the present application, the first inner wall 111 of the second locker 102 may form a gap, i.e., a buffer chamber 108, with the outer sidewall of the pressing member 103. The buffer chamber 108 can be formed by designing the size of the pressing member 103 to be smaller than that of the first locker 101 so that the buffer chamber 108 is formed between the outer side wall of the pressing member 103 and the inner side wall of the second locker 102; the size of the pressing member 103 is not limited, but a concave space may be formed on the inner sidewall of the second locker 102 to form the buffer chamber 108. The dimension here means a diameter of a cross section when the pressing member 103 and the first lock member 101 are cylindrical bodies, or an average or maximum width of a cross section in the axial direction when the pressing member 103 and the first lock member 101 are not cylindrical bodies. The first inner wall 111 may be an inner side wall of the second locker 102 opposite to an outer side wall of the pressing member 103, and when a through hole is formed on the inner side wall of the second locker 102, the through hole may communicate with the buffer chamber 108.

In another embodiment of the present application, channel 110 includes a recessed area 109 formed by first and second

inner walls

111 and 112 of second locking member 102 to compress pull wire 104 in the recessed area. The second inner wall 112 may be a surface that bears against the puller wire 104. The recessed area allows for more room for cushioning of the pull wire 104 at the intersection of the entry compression member 103 and the second locking member 102, thereby further reducing the chance of the pull wire 104 being severed during operation.

As shown in fig. 3A-5C, in the present embodiment, channel 110 includes a first throughbore 105 extending axially through second retaining member 102. As shown in fig. 3A to 3C, the pressing member 103 and the first fastening member 101 are fixedly connected, in this embodiment, the pressing member 103 and the first fastening member 101 are integrally formed, and the pressing member 103 and the first fastening member 101 may be designed as two separate parts fixedly connected by a fixing member as required. In this embodiment, the surface of the pressing member 103 facing the wire 104 is a flat surface, and the surface of the second inner wall 112 is a flat surface.

As shown in fig. 4A to 4C, in this embodiment, the pressing member 103 is a rectangular parallelepiped, and the second locking member 102 is further provided with a second through hole 106 penetrating through the second locking member 102 in the second direction, the second through hole 106 being configured to penetrate through the pressing member 103 and move, for example, slide up and down, the pressing member 103 in the first direction. In this embodiment, the pressing member 103 is independent of the first locking member 101, and the user can manually adjust the movement of the pressing member 103, and in other cases, the pressing member 103 can be movably connected to the first locking member 101, for example, by a flexible wire connecting the pressing member 103 and the first locking member 101, so that when the first locking member 101 is rotated, the pressing member 103 is not affected by the rotating force of the first locking member 101, and only moves in the first direction. In this embodiment, the surface of the pressing member 103 facing the wire 104 is a flat surface, and the surface of the second inner wall 112 is a flat surface. The second direction may be perpendicular to the first direction, or at any suitable angle to the first direction.

As shown in fig. 5A-5C, this embodiment differs from the embodiment shown in fig. 4A-4C in that the pressing member 103 is cylindrical, the surface of the pressing member 103 facing the wire 104 is curved, and the surface of the second inner wall 112 is flat. Since the cambered surface can make the pressing force of the pressing member 103 more concentrated with respect to the plane, the pressing member 103 can more firmly press the pulling wire 104.

As shown in fig. 6A to 6C, in this embodiment, the pressing member 103 is independent from the first locking member 101, and a through hole is formed in the pressing member 103 for passing through the first locking member 101, so that the first locking member 101 and the second locking member 102 are cooperatively locked. The surface of the pressing member 103 facing the pulling wire 104 is a flat surface, and the surface of the second inner wall 112 is a flat surface. In this embodiment, the pressing member 103 has a protrusion, and the second locker 102 has a recess, which forms an accommodation space larger than the contour of the protrusion, so that the protrusion and the recess are sandwiched to form the channel 110 or a part of the channel 110. Optionally, a rounded corner (A, B, C, D) may be formed at the inflection point of the protrusion and the groove to prevent the pulling wire 104 from being broken due to too sharp a corner.

By designing the surface of the pressing member 103 facing the wire 104 as a flat surface or a curved surface and the surface of the second inner wall 112 as a flat surface, it is possible to avoid the problem that the wire 104 is cut due to the pressing of the wire 104 by a sharp surface.

By non-fixedly connecting the pressing member 103 with the first locking member 101, when the second locking member 102 needs to be rotationally locked relative to the first locking member 101, the pressing member 103 only moves along the first direction and does not rotate along with the rotation of the second locking member 102, so that the shearing force applied to the pull wire 104 due to the rotation is avoided.

Finally, it should be noted that: the above embodiments are only used for illustrating the technical solutions of the embodiments of the present application, and are not limited thereto; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions in the embodiments of the present application.

Claims

1. A locking device for use in compressing a pull cord, the locking device comprising:

a first locking member;

the second locking piece is matched and connected with the first locking piece;

the pressing piece is used for pressing the pull wire;

a passage for passing the wire;

the first locking piece is controlled to be matched and locked with the second locking piece, so that the pressing piece moves along the first direction, and the pull wire is pressed in the channel.

2. The locking mechanism of claim 1, wherein the channel includes a buffer chamber defined by the sidewall of the compression member and the first inner wall of the second locking member to limit shear forces on the pull wire when the compression member compresses the pull wire.

3. The locking device of claim 2, wherein the compression member is smaller in size than the first locking member.

4. The locking device of claim 2, wherein the channel includes a recessed area formed by the first inner wall and the second inner wall of the second locking member to compress the pull wire in the recessed area.

5. The locking mechanism of claim 2, wherein the passage includes a first through-hole extending axially through the second locking member.

6. The locking device of claim 5, wherein the second locking member further comprises a second through hole extending through the second locking member in the second direction, the second through hole being adapted to pass through the pressing member and move the pressing member in the first direction.

7. A locking arrangement according to claim 2 wherein the compression member has a projection and the second locking member has a recess and the passage includes an area formed by the projection engaging the recess.

8. A locking device according to claim 1, wherein the surface of the compression member facing the pull wire is flat or curved and the surface of the second inner wall is flat.

9. The locking device of claim 1, wherein the first locking member is threadably coupled to the second locking member.

10. A locking device according to any one of claims 1 to 9, wherein the compression member is fixedly or non-fixedly connected to the first locking member.