CN113349845B - Locking device - Google Patents

Abstract

The present application provides a locking device for compressing the pull wire, the locking device includes: a first locking part; a second locking part, which is mated with the first locking part; a pressing part, used for Compressing the pull wire; the channel is used to pass through the pull wire; wherein, by controlling the first locking member to cooperate and lock with the second locking member, the pressing member is moved along the first direction, Then press the pull wire tightly in the channel. The locking device can lock the pull wire more firmly, and the operations of locking the pull wire and adjusting the position of the pull wire are relatively simple.

Description

Locking device

technical field

The embodiments of the present application relate to the technical field of medical devices, and in particular to a locking device for compressing a pull wire.

Background technique

Minimally invasive surgery and interventional surgery are becoming more and more common. In some occasions, it is necessary to lock the pull wire. For example, in surgical instruments, it is often necessary to lock the metal pull wire of the sheath tube or other components.

An existing stay wire locking device, as shown in Fig. 1 and Fig. 2, uses a spring to squeeze the pin shaft, so that the pin shaft presses the metal stay wire. However, the force exerted by the spring of this cable locking device is limited, so the locking force provided to the cable is relatively small. In addition, since the cable needs to be installed and the position of the cable needs to be adjusted during the operation, the pins need to be adjusted on both sides, which requires high assembly operations, and the reliability of the device is poor, and there is a risk of failure.

Therefore, there is an urgent need for a guy wire locking device with greater locking force and higher reliability.

Contents of the invention

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

An embodiment of the present application provides a locking device for compressing a pull wire, the locking device includes: a first locking part; a second locking part, which is mated and connected with the first locking part; a pressing part, It is used to compress the pull wire; the channel is used to pass through the pull wire; wherein, by controlling the first locking member to make it lock with the second locking member, the pressing member can be locked in the first direction Move, and then press the pull wire tightly in the channel.

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

Optionally, the size of the pressing part is smaller than that of the first locking part.

Optionally, the channel includes a recessed area formed by the first inner wall and the second inner wall of the second locking member, so that the pull wire is compressed into the recessed area.

Optionally, the passage includes a first through hole axially penetrating the second locking member.

Optionally, the second locking member is also provided with a second through hole passing through the second locking member along the second direction, the second through hole is used to pass through the pressing member, and make the pressing member Move in the first direction.

Optionally, the pressing member has a protrusion, the second locking member has a groove, and the channel includes a region formed by the protrusion and the groove being clamped.

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

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

Optionally, the pressing member is fixedly connected or not fixedly connected to the first locking member.

It can be seen from the above technical solutions that the locking device of the embodiment of the present application locks through the cooperation of the first locking member and the second locking member. During the locking process, the first locking member will force the pressing member to move along the first direction, Then the stay wire is pressed tightly in the channel, and the stay wire is locked more firmly.

Secondly, compared with the prior art shown in Figures 1-2, when the second locking member is fixed, the locking of the pull wire only needs to be adjusted by the first locking member to realize the first locking member. The operation of locking or loosening the second locking member, locking the pull wire and adjusting the position of the pull wire is relatively simple.

In addition, a buffer chamber is provided in the channel to limit the shearing force on the pull wire when the pressing member compresses the pull wire, so as to reduce the possibility of the pull wire being cut off during operation.

Again, the design of the recessed area can further provide a buffer space for the pull wire, thereby further reducing the chance of the pull wire being cut off during operation.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are only These are some embodiments described in the embodiments of the present application, and those skilled in the art can also obtain other drawings based on these drawings.

Fig. 1 is the side view of existing a kind of 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 sectional view of the locking device shown in Fig. 3A;

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

Fig. 3D is a perspective view of a first locking member of the locking 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 sectional view of the locking device shown in Fig. 4A;

Fig. 4C is a perspective view of a second locking member of the locking 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 sectional view of the locking device shown in Fig. 5A;

Fig. 5C is a perspective view of a second locking member of the locking 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.

Component number

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

detailed description

In order to enable those skilled in the art to better understand the technical solutions in the embodiments of the present application, the following will clearly and completely describe the technical solutions in the embodiments of the present application in conjunction with the drawings in the embodiments of the present application. Obviously, the described The embodiments are only some of the embodiments of the present application, but not all of them. All other embodiments obtained by persons of ordinary skill in the art based on the embodiments in the embodiments of the present application shall fall within the protection scope of the embodiments of the present application.

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

The "upper" and "lower" refer to the relative orientations of "upper" and "lower" on the plane where the drawing is located.

The specific implementation of the embodiment of the present application will be further described below in conjunction with the accompanying drawings of the embodiment of the present application.

Referring to FIG. 3A to FIG. 6C, in a specific implementation of the present application, a locking device 10 is provided, which includes: a first locking member 101; a second locking member 102, which is mated with the first locking member 101 ; the compression member 103 is used to compress the pull wire 104; the channel 110 is used to pass through the pull wire 104; wherein, by controlling the first locking member 101 and the second locking member 102 to lock together, the pressing member 103 Move along the first direction, and then press the pull wire 104 into the channel 110 , so that the pull wire 104 is firmly locked.

The first direction may be perpendicular to or at a certain angle to the extension direction of the pull wire 104 , so as to facilitate the pressing member 103 to compress the pull wire 104 . The first locking member 101 and the second locking member 102 can be threaded, as shown in Figure 3A to Figure 6C, the first locking member 101 has external threads, the second locking member 102 has internal threads, the first locking member The first locking member 101 and the second locking member 102 can be relatively locked by relative rotation of the first locking member 101 and the second locking member 102 . However, the structure of the first locking member 101 and the second locking member 102 is not limited thereto, and may also be any other suitable structure that satisfies the mating connection.

Compared with the prior art shown in Figures 1-2, when the second locking member 102 is fixed, the locking of the pull wire only needs to be adjusted by adjusting the first locking member 101, for example, two fingers clockwise or counterclockwise. Rotating the first locking member 101 clockwise can lock or loosen the first locking member 101 and the second locking member 102 , and the operation of locking the pull wire 104 and adjusting the position of the pull wire 104 is relatively simple. However, in the prior art, when adjusting the position of 104, it is necessary to pull the pin shaft from both sides and drag it backward.

The inside of the second locking member 102 can be provided with a cavity 107 for accommodating the first locking member 101 and locking the first locking member 101 therein, and the pressing member 103 can be positioned on the second locking member 102 below.

The channel 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 locking member 102 to limit the shearing of the pulling wire 104 when the pressing member 103 compresses the pulling wire 104 force. The formation of the buffer chamber 108 prevents the pulling wire 104 from being broken due to the compression of the pressing member 103 and the second locking member 102 on the pulling wire 104 .

In an embodiment of the present application, the first inner wall 111 of the second locking member 102 may form a gap with the outer wall of the pressing member 103 , that is, the buffer chamber 108 . The buffer chamber 108 can form a buffer chamber 108 between the outer wall of the pressing member 103 and the inner wall of the second locking member 102 by designing the size of the pressing member 103 smaller than the size of the first locking member 101; The size of the pressing member 103 may not be limited, but a concave space is formed on the inner side wall of the second locking member 102 to form the buffer chamber 108 . The size here refers to the diameter of the cross section when the pressing part 103 and the first locking part 101 are cylinders, or the cross section along the axial direction when the pressing part 103 and the first locking part 101 are not cylindrical The average or maximum width of . The first inner wall 111 can be the inner side wall of the second locking member 102, which is opposite to the outer side wall of the pressing member 103. When a through hole is formed on the inner side wall of the second locking member 102, the through hole can be connected to the buffer chamber 108 connected.

In another embodiment of the present application, the channel 110 includes a recessed area 109 formed by the first inner wall 111 and the second inner wall 112 of the second locking member 102 to compress the pull wire 104 in the recessed area. The second inner wall 112 may be a surface supporting the pull wire 104 . The recessed area enables the pull wire 104 to obtain a larger buffer space at the intersection of the pressing part 103 and the second locking part 102 , thereby further reducing the possibility of the pull wire 104 being cut during operation.

As shown in FIGS. 3A-5C , in the embodiment of the present application, the channel 110 includes a first through hole 105 axially penetrating through the second locking member 102 . As shown in Figures 3A-3C, the pressing member 103 is fixedly connected to the first locking member 101. In this embodiment, the pressing member 103 and the first locking member 101 are integrally formed. 103 and the first locking member 101 are designed as two independent parts fixedly connected by a fixing member. In this embodiment, the surface of the pressing member 103 facing the pull wire 104 is a plane, and the surface of the second inner wall 112 is a plane.

As shown in Figures 4A-4C, in this embodiment, the pressing member 103 is a cuboid, and the second locking member 102 is also provided with a second through hole 106 passing through the second locking member 102 along the second direction, the second through hole 106 is used to pass through the pressing member 103 and make the pressing member 103 move along a first direction, for example, slide up and down. 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. In other cases, the pressing member 103 can also be flexibly connected to the first locking member 101. , such as connecting the pressing part 103 and the first locking part 101 through a flexible line, so that when the first locking part 101 is rotated, the pressing part 103 is not affected by the rotational force of the first locking part 101, but only along the Move in the first direction. In this embodiment, the surface of the pressing member 103 facing the pull wire 104 is a plane, and the surface of the second inner wall 112 is a plane. The second direction can be perpendicular to the first direction, or at any suitable angle to the first direction.

As shown in Figures 5A-5C, the difference between this embodiment and the embodiment shown in Figures 4A-4C is that the pressing member 103 is cylindrical, the surface of the pressing member 103 facing the pull wire 104 is an arc surface, and the surface of the second inner wall 112 for the plane. Since the arc surface can make the pressure of the pressing member 103 more concentrated compared to the plane, the pressing member 103 can press the pull wire 104 more firmly.

As shown in Figures 6A-6C, in this embodiment, the pressing member 103 is independent from the first locking member 101, and the pressing member 103 is provided with a through hole for passing through the first locking member 101, so that the first locking member 101 A locking member 101 cooperates with a second locking member 102 to lock. The surface of the pressing member 103 facing the pull wire 104 is a plane, and the surface of the second inner wall 112 is a plane. In this embodiment, the pressing member 103 has a protrusion, and the second locking member 102 has a groove, and the accommodation space formed by the groove is larger than the profile of the protrusion, so that the protrusion and the groove are clamped to form a channel 110 or part of channel 110. Optionally, rounded corners (A, B, C, D) can be formed at the turning points of the protrusions and the grooves, so as to prevent the pull wire 104 from being broken due to too sharp corners.

By designing the surface of the pressing member 103 facing the pull wire 104 as a plane or an arc surface, and designing the surface of the second inner wall 112 as a plane, the problem that the pull wire 104 is cut due to the sharp surface pressing the pull wire 104 can be avoided.

By non-fixedly connecting the pressing member 103 to the first locking member 101, when the second locking member 102 needs to be rotated and locked relative to the first locking member 101, the pressing member 103 only moves along the first direction, It does not rotate with the rotation of the second locking member 102 to avoid applying shear force to the pull wire 104 due to the rotation.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the embodiments of the present application, and are not intended to limit them; although the application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: It is still possible to modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and spirit of the technical solutions of the various embodiments of the present application. scope.

Claims (5)

1. A locking device for compressing a backguy, the backguy is a metal backguy, characterized in that the locking device comprises: first locking member; a pressing piece, used for pressing the pull wire, and the pressing piece is not fixedly connected with the first locking piece; The second locking piece is threadedly connected with the first locking piece, and the second locking piece is also provided with a second through hole passing through the second locking piece along the second direction, and the second through hole is used for passing through the pressing member and moving the pressing member in a first direction; a channel for passing the guy wire, the channel comprising: a buffer chamber formed by the side wall of the pressing member and the first inner wall of the second locking member to limit the shearing force on the pull wire when the pressing member compresses the pull wire; a recessed area, which is formed by the first inner wall and the second inner wall of the second locking member, so as to compress the pull wire in the recessed area; Wherein, by controlling the first locking member to cooperate and lock with the second locking member, the pressing member is moved along the first direction, and then the pull wire is pressed into the channel. 2. The locking device according to claim 1, wherein the size of the pressing part is smaller than that of the first locking part. 3. The locking device according to claim 1, wherein the channel comprises a first through hole axially penetrating the second locking member. 4. The locking device according to claim 1, wherein the pressing member has a protrusion, the second locking member has a groove, and the channel includes a channel formed by clamping the protrusion and the groove. area. 5 . The locking device according to claim 1 , wherein a surface of the pressing member facing the pull wire is a plane or an arc surface, and a surface of the second inner wall is a plane.

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