CN112656343A

CN112656343A - Endoscope camera communication cable and endoscope camera system

Info

Publication number: CN112656343A
Application number: CN201910983286.2A
Authority: CN
Inventors: 曾强; 刘洲
Original assignee: Shenzhen Mindray Bio Medical Electronics Co Ltd
Current assignee: Shenzhen Mindray Bio Medical Electronics Co Ltd
Priority date: 2019-10-16
Filing date: 2019-10-16
Publication date: 2021-04-16

Abstract

An endoscope camera communication cable and an endoscope camera system, the endoscope camera communication cable comprising: the first connecting terminal is arranged at one end of the first front sleeve and used for being connected with a chip module of the camera; one end of the connecting wire is inserted from one end of the first front sleeve far away from the first connecting terminal and connected with the first connecting terminal; and the shielding ring is arranged in the first front sleeve and sleeved on the connecting line. Because with the built-in first connector that is connected at the chip module in endoscope camera communication cable and the handle of shield ring, the shield ring can carry out interfering signal's shielding to the signal that the chip module conveys out to the shield ring sets up on endoscope camera communication cable, makes the holding intracavity of handle need not to set up the space that holds the shield ring, has reduced the volume of handle, has realized the miniaturization of handle, makes things convenient for the handheld operation of doctor.

Description

Endoscope camera communication cable and endoscope camera system

Technical Field

The present application relates to in vivo diagnostic instruments, and in particular to an endoscope camera communication cable and an endoscope camera system.

Background

The hard tube endoscope is mainly used for diagnosing and/or treating the focus of natural cavity in superficial and superficial body surface and cavity through puncture, such as cystoscope and hysteroscope, and is not bent during operation.

The hard tube endoscope mainly comprises a camera, a light source, a light guide beam, a hard tube endoscope, an optical bayonet, a camera host and a display. The endoscope is a camera system, and including camera and camera host computer, the camera is used for shooing internal image, and the camera passes through the communication cable and is connected with camera host computer, and the image after will shooing is transmitted for camera host computer with the mode of signal. The camera transmits signals through the communication cable, and is easily interfered by other interference signals in the transmission process to influence the transmission quality.

Disclosure of Invention

The application provides an endoscope camera communication cable and an endoscope camera system which have anti-jamming capability and are beneficial to miniaturization of an endoscope camera.

An embodiment provides an endoscope camera communication cable, comprising:

the first connecting terminal is arranged at one end of the first front sleeve and used for being connected with a chip module of the camera;

one end of the connecting wire is inserted into the first front sleeve and connected with the first connecting terminal;

and the shielding ring is arranged in the first front sleeve and sleeved on the connecting line, and is used for shielding interference signals.

In one embodiment, the shielding ring is a magnetic ring.

In one embodiment, the first connection terminal, the shielding ring and the end of the connection line are fixed in the first front sleeve by solid glue.

In one embodiment, the first connector is fixed in the first front sleeve by solid glue, and the shielding ring and the end of the connecting wire are clamped in the first front sleeve.

In one embodiment, the first front sleeve is provided with grooves and/or protrusions in the area filled with the solid glue.

In one embodiment, the groove is an annular groove and the protrusion is an annular protrusion.

In one embodiment, a ferrule is disposed at an end of the first front sleeve away from the first connection terminal, and the ferrule is clamped between the first front sleeve and the connection line.

In one embodiment, the shielding ring is located between the first connection terminal and the ferrule, and an end of the shielding ring away from the first connection terminal abuts against the ferrule.

In one embodiment, a locking hole is formed in one end, away from the first connection terminal, of the first front sleeve, and a locking screw is installed in the locking hole and used for locking the ferrule and the connection line in the first front sleeve.

In one embodiment, the first connector further comprises a first rear end pipe, one end of the first rear end pipe is sleeved on one end of the first front sleeve far away from the first connecting terminal, and the connecting wire is arranged in the first rear end pipe in a penetrating mode.

In one embodiment, an axial table is formed at the inner narrowing of one end of the first rear end pipe away from the first front sleeve, and the end part of the first front sleeve and the end part of the cutting sleeve are abutted on the table in the first front sleeve.

In one embodiment, the endoscope camera communication cable further comprises a second connector, the second connector is used for being connected with a host, and one end, far away from the first connector, of the connecting line is connected with the second connector.

The embodiment provides an endoscope camera system, including light source, leaded light beam, endoscope, optics bayonet socket, camera, host computer of making a video recording, display, video connecting wire and foretell endoscope camera communication cable, the light source passes through leaded light beam with the endoscope is connected, the one end of camera passes through the optics bayonet socket with the endoscope is connected, the other end of camera passes through endoscope camera communication cable with the host computer of making a video recording is connected, the host computer of making a video recording pass through the video connecting wire with the display is connected.

In one embodiment, the camera comprises:

the handle is provided with an accommodating cavity, and two ends of the handle are provided with openings communicated with the accommodating cavity;

the chip module is arranged in the accommodating cavity of the handle; the chip module is provided with a communication terminal, and the communication terminal is connected with the first connecting terminal.

In one embodiment, the communication terminal and the first connection terminal are connected by a transition cable.

In one embodiment, an opening at one end of the handle is provided with a mounting seat, the mounting seat is provided with a mounting hole communicated with the accommodating cavity, and the first connecting head is inserted into the mounting hole of the mounting seat of the handle.

In one embodiment, the mounting seat and the handle are of an integral structure.

In one embodiment, a locking sleeve is mounted at an end of the mounting seat, and the locking sleeve locks the first connecting terminal in the mounting seat.

In one embodiment, one end of the locking sleeve is sleeved on the mounting seat, and a sealing ring is arranged between the locking sleeve and the mounting seat.

In one embodiment, a narrowing portion is arranged on the outer circumference of one end, far away from the handle, of the first front sleeve, an inner hole narrowing portion is arranged at one end, close to the mounting seat, of the locking sleeve, and the narrowing portion of the first front sleeve is clamped in the narrowing portion of the locking sleeve.

According to the endoscope camera communication cable and the endoscope camera system of above-mentioned embodiment, owing to with the shield ring built-in the first connector that the chip module in endoscope camera communication cable and the handle is connected, the shield ring can shield interference signal's protection to the signal that the chip module conveys out, and the shield ring sets up on endoscope camera communication cable, make the holding intracavity of handle need not to set up the space that holds the shield ring, the volume of handle has been reduced, the miniaturization of handle has been realized, make things convenient for the handheld operation of doctor.

Drawings

FIG. 1 is a schematic diagram of an endoscopic camera system according to an embodiment;

FIG. 2 is a schematic diagram of the configuration of an endoscopic camera and an endoscopic camera communication cable according to an embodiment;

FIG. 3 is a cross-sectional view of an endoscope camera communication cable in one embodiment;

FIG. 4 is a cross-sectional view of an endoscope camera and endoscope camera communication cable in one embodiment;

FIG. 5 is a cross-sectional view of an endoscope camera communication cable in one embodiment;

FIG. 6 is a partial cross-sectional view of a handle in one embodiment.

Detailed Description

Wherein like elements in different embodiments are numbered with like associated elements. In the following description, numerous details are set forth in order to provide a better understanding of the present application. However, those skilled in the art will readily recognize that some of the features may be omitted or replaced with other elements, materials, methods in different instances. In some instances, certain operations related to the present application have not been shown or described in detail in order to avoid obscuring the core of the present application from excessive description, and it is not necessary for those skilled in the art to describe these operations in detail, so that they may be fully understood from the description in the specification and the general knowledge in the art.

Furthermore, the features, operations, or characteristics described in the specification may be combined in any suitable manner to form various embodiments. Also, the various steps or actions in the method descriptions may be transposed or transposed in order, as will be apparent to one of ordinary skill in the art. Thus, the various sequences in the specification and drawings are for the purpose of describing certain embodiments only and are not intended to imply a required sequence unless otherwise indicated where such sequence must be followed.

The numbering of the components as such, e.g., "first", "second", etc., is used herein only to distinguish the objects as described, and does not have any sequential or technical meaning. The term "connected" and "coupled" when used in this application, unless otherwise indicated, includes both direct and indirect connections (couplings).

The present invention will be described in further detail with reference to the following detailed description and accompanying drawings.

As shown in fig. 1, in one embodiment, an endoscopic camera system 1000 is provided, the endoscopic camera system 1000 comprising a light source 10, a light guide bundle 20, a hard-tube endoscope 30, an optical bayonet 40, a camera 50, an endoscopic camera communication cable 81, a camera host 60, a display 70, and a video connection line 82. The camera main unit 60 is connected to the camera 50 through an endoscope camera communication cable 81, and an image signal obtained by the camera 50 is transmitted to the camera main unit 60 through the endoscope camera communication cable 81 to be processed. In certain embodiments, the endoscope camera communication cable 81 may be an optical communication cable, such as an optical fiber; the camera 50 converts an image signal (electrical signal) into an optical signal, and the optical signal is transmitted to the main camera 60 through the endoscope camera communication cable 81, and the main camera 60 converts the optical signal into an electrical signal. The camera host 60 is connected to the display 70 through a video connection line 82, and is configured to transmit a video signal to the display 70 for displaying. It should be understood by those skilled in the art that fig. 1 is merely an example of an endoscopic camera system 1000 and does not constitute a limitation of the endoscopic camera system 1000, and that the endoscopic camera system 1000 may include more or less components than those shown in fig. 1, or some components in combination, or different components, e.g., the endoscopic camera system 1000 may further include a dilator, smoke control, input-output device, network access device, etc.

The light source 10 is used to provide an illumination source to the site to be observed 100. The illumination light source includes a visible light illumination light source and a laser illumination light source (e.g., near infrared light) corresponding to a fluorescent reagent. Light source 10 includes, but is not limited to, a laser light source, an LED light source, or a laser diode.

In the present embodiment, the light source 10 includes a visible light source and a laser light source corresponding to a fluorescent reagent. The visible light source is an LED light source. In one embodiment, the visible light source can provide a plurality of monochromatic lights in different wavelength ranges, such as blue light, green light, red light, and the like. In other embodiments, the visible light source may also provide a combination of the plurality of monochromatic lights, or a broad spectrum white light source. The wavelength range of the monochromatic light is approximately 400nm to 700 nm. The laser light source is used for generating laser light. The laser light is, for example, Near Infrared (NIR). The peak wavelength of the laser takes at least any 1 value in the range of 780nm or 808 nm.

Since the light source 10 can simultaneously provide continuous visible light and laser light corresponding to the fluorescent reagent to the portion to be observed, the collection efficiency of the camera 50 for the visible light image signal and the fluorescent image signal reflected by the portion to be observed 100 is improved.

Wherein a contrast agent, such as Indocyanine Green (ICG), is introduced intravenously or subcutaneously in the site 100 to be observed prior to imaging using the endoscopic camera system 1000, in order to image tissue structures and functions (e.g., blood/lymph/bile in vessels) that are not readily visible using standard visible light imaging techniques. Sites to be observed 100 include, but are not limited to, the blood circulation system, the lymphatic system, and tumor tissue. ICG is commonly known as indocyanine green, a diagnostic green needle, indocyanine green, which is a commonly used contrast agent in clinical diagnosis of cardiovascular system diseases at present, and is widely used in choroidal and retinal vessel imaging. The contrast agent in the region 100 to be observed may generate fluorescence when it absorbs the laser light corresponding to the fluorescent agent generated by the laser light source.

In one embodiment, an endoscope camera communication cable 81 is provided, which is described by taking a hard tube endoscope camera communication cable as an example, and can also be applied to a soft lens.

As shown in fig. 1 and 2, the endoscope camera communication cable 81 of the present embodiment includes a first connector 1, a connecting wire 2, a second connector 3, and a shielding ring 4, two ends of the connecting wire 2 are respectively connected to the first connector 1 and the second connector 3, the first connector 1 is used for connecting with the camera 50, the second connector 3 is used for connecting with the camera main unit 60, and the shielding ring 4 is installed in the first connector 1.

As shown in fig. 5, the first connector 1 includes a first front sleeve 11, a first rear sleeve 12 and a first connection terminal 13, the first front sleeve 11 and the first rear sleeve 12 are clamped together, the first front sleeve 11 and the first rear sleeve 12 may also be an integral structure, and in some embodiments, the first rear sleeve 12 may also be omitted.

As shown in fig. 2 and 3, one end of the first connection terminal 13 is exposed to the first front sleeve 11, and the other end is fixed in the first front sleeve 11 by the solid glue 11a, and the end of the first connection terminal 13 exposed to the first connection terminal 13 is provided with an interface 13 a. One end of the connection wire 2 is inserted into the first front sleeve 11 from an end of the first front sleeve 11 away from the first connection terminal 13, and the end of the connection wire 2 inserted into the first front sleeve 11 extends to be connected with the first connection terminal 13. One end of the first front sleeve 11, which is provided with the first connection terminal 13, is adapted to the mounting seat 511 of the handle 51, the first front sleeve 11 is used for being inserted onto the mounting seat 511 of the handle 51, one end of the first connection terminal 13, which is exposed out of the first connection terminal 13, extends into the accommodating cavity of the handle 51, and the interface 13a of the first connection terminal 13 is used for being connected with the chip module 52 in the handle 51 through the transition cable 53.

The outer surface of the first front sleeve 11 is provided with an annular groove, a sealing ring 15a is installed in the annular groove, the sealing ring 15a is clamped between the mounting seat 511 of the handle 51 and the first front sleeve 11, and water can be prevented from entering the accommodating cavity of the handle 51 from the space between the mounting seat 511 of the handle 51 and the first front sleeve 11.

The shield ring 4 is installed in first front sleeve 11, and the cover is established on connecting wire 2, shield ring 4 is the magnetic ring, shield ring 4 forms the magnetic field at first front sleeve 11, shield ring 4 is the magnetic material of pre-selection, make shield ring 4 shield the interference of interference signal to connecting wire 2 transmission signal, the endoscope camera communication cable 81 signal transmission quality has been improved, shield ring 4 installs in first connecting terminal 13 simultaneously, the holding chamber of handle 51 need not to set up the space that holds shield ring 4, the volume of handle 51 has been reduced, make things convenient for the handheld handle 51 operation of doctor.

One end of the shielding ring 4 and the first connecting terminal 13 and the end of the connecting wire 2 are fixed in the first front sleeve 11 through solid glue 11a, the shielding ring 4 is encapsulated in the first front sleeve 11 through the solid glue 11a, and the shielding ring 4 and the first front sleeve 11 form an integrated fixing structure. And shield ring 4 installs in the holding intracavity of handle 51 among the prior art, and the mode that adopts the mount pad is fixed usually, appears the not hard up problem of shield ring 4 easily, compares prior art this application shield ring 4 built-in at first connecting terminal 13 stable in structure, can not appear phenomenons such as not hard up.

For better encapsulation shielding ring 4, first connection terminal 13 and connecting wire 2, be provided with annular groove 11b in first front sleeve 11 near the one end of first connection terminal 13, solid-state glue 11a extends to and fills to annular groove 11b in for the solid-state glue forms one and has the bellied structure of annular, solidified solid-state glue 11a will pass through annular protruding card in annular groove 11b, the axial degree of freedom of solid-state glue 11a has been restricted, encapsulation shielding ring 4 has been guaranteed, first connection terminal 13, connecting wire 2 and solid-state glue 11a can not the axial roll-off first front sleeve 11 together. In other embodiments, an annular protrusion, or several separate smaller protrusions or grooves, may be provided in the first front sleeve 11 to also serve as an axial stop.

For better fixed connecting wire 3, cutting ferrule 14 is installed to the one end that first front sleeve 11 kept away from first connection terminal 13, and cutting ferrule 14 is located between first front sleeve 11 and connecting wire 2, and connecting wire 2 passes through cutting ferrule 14 locking in first front sleeve 11, has avoided the not hard up of connecting wire. The cutting ferrule 14 is further provided with an annular clamping groove, a sealing ring 15b is installed in the annular clamping groove, the sealing ring 15b is extruded between the cutting ferrule 14 and the first front sleeve 11, and water can be prevented from entering the first front sleeve 11 along the connecting line 2.

In this embodiment, a locking hole is formed at an end of the first front sleeve 11 away from the first connection terminal 13, a locking screw 16 is installed in the locking hole, the locking screw 16 presses the outer wall of the ferrule 14, and the ferrule 14 and the connection line 2 are locked in the first front sleeve 11 by the locking screw 16.

In other embodiments, one end of the first connection terminal 13 is fixed in the first front sleeve 11 by the solid glue 11a, the connection line 2 is clamped in the first front sleeve 11 by the ferrule 14, and two ends of the shielding ring 4 respectively abut against the end face of the first connection terminal 13 and the end face of the ferrule 14, so that the first connection terminal 13, the ferrule 14 and the shielding ring 4 can be also fixed in the first front sleeve 11.

In this embodiment, a narrowed mounting portion is disposed on an outer surface of one end of the first front sleeve 11, which is far away from the first connection terminal 13, one end of the first rear sleeve 12 is inserted into the mounting portion of the first connection terminal 13, a groove and a protrusion are disposed on the mounting portion of the first connection terminal 13, a corresponding protrusion and a corresponding groove are disposed on an inner surface of the first rear sleeve 12, and the first rear sleeve 12 is fastened to the first front sleeve 11 through elastic deformation.

The inside narrowing setting of one end of sleeve 11 is kept away from to first back sleeve pipe 12, forms axial mesa in the narrowing department, and the hole of narrowing can only hold connecting wire 2, and first preceding sleeve pipe 11 and cutting ferrule 14 cartridge are in the one end of first back sleeve pipe 12 to the tip of first preceding sleeve pipe 11 and the tip of cutting ferrule 14 all support and lean on the mesa of first back sleeve pipe 12 narrowing department, and first back sleeve pipe 12 forms axial spacing to first preceding sleeve pipe 11 and cutting ferrule 14, has further prevented deviating from of cutting ferrule 14 and connecting wire 2.

In this embodiment, the second connector 3 is the same as the first connector 1 in structure, the second connector 3 includes a second front sleeve, a second rear sleeve and a second connecting terminal, one end of the connecting wire 2 far away from the first connector 1 is connected with the second connecting terminal, the second front sleeve is connected with the second rear sleeve in a clamping manner, the end parts of the second connecting terminal and the connecting wire are fixed in the second front sleeve, and the second rear sleeve plays a role in further axial fixation.

In other embodiments, the second connector 3 may also be configured to have a different structure from the first connector 1, for example, the second connector 3 is only a clamping member, the connecting cable 2 is clamped to the camera host 60, and the connecting cable 2 is directly connected to a main board of the camera host 60.

In one embodiment, as shown in fig. 4, an endoscopic camera system 1000 is provided, and a camera 50 of the endoscopic camera system 1000 includes a handle 51 and a chip module 52, wherein the handle 51 has a receiving cavity, and openings are provided at two ends of the handle 51, and the openings at the two ends are communicated with the receiving cavity. A front cover 53 is mounted on an opening of one end of the handle 51, and the chip module 52 is mounted in the accommodating cavity of the handle 51 and mounted on the front cover 53.

As shown in fig. 6, a mounting seat 511 is disposed on the other opening of the handle 51, the mounting seat 511 has a mounting hole, and the mounting hole of the mounting seat 51 is communicated with the accommodating cavity of the handle 51. The first connector 1 of the endoscope camera communication cable 81 is inserted into the mounting hole of the mounting seat 51, the first connection terminal 13 of the first connector 1 is located in the accommodating cavity of the handle 51, and the first connection terminal 13 is connected with the chip module 52 through the transition cable 53.

In this embodiment, the mounting seat 511 and the handle 51 are an integral structure, and in other embodiments, the mounting seat 511 may be fixedly connected to the handle 51 by a screw or a snap.

The chip module 52 includes components such as a sensor and a processor, and the chip module 52 is configured to convert the optical signal into an electrical signal, process the electrical signal, and transmit the electrical signal to the camera host 60 through the endoscope camera communication cable 81 for processing.

In one embodiment, as shown in fig. 5 and 6, in order to fix the endoscope camera communication cable 81 better, a locking sleeve 512 is further connected to an end portion of the mounting seat 511, one end of the locking sleeve 512 is sleeved on the end portion of the mounting seat 511 in a clamping manner, and the endoscope camera communication cable 81 is inserted into the locking sleeve 512. The locking sleeve 512 has a narrowing in its inner bore near the mounting base 511, which is a mounting hole with a smaller inner diameter, thereby forming a table-top at the narrowing. The outer circumference of one end of the first front sleeve 11 close to the second rear sleeve 12 is provided with a narrowing part, the narrowing part of the first front sleeve 11 also forms a table surface, the narrowing part of the first front sleeve 11 is clamped in the narrowing part of the locking sleeve 512, the table surface of the locking sleeve 512 is blocked on the table surface of the first front sleeve 11, and therefore the locking sleeve 512 locks the first front sleeve 11 in the mounting seat 511.

In one embodiment, the outer circumference of the mounting seat 511 is provided with an annular groove, a sealing ring 513 is installed in the annular groove, and the sealing ring 513 is tightly pressed between the mounting seat 511 and the locking sleeve 512, so that water can be prevented from entering the accommodating cavity of the handle 51 from the space between the mounting seat 511 and the locking sleeve 512.

The present invention has been described in terms of specific examples, which are provided to aid understanding of the invention and are not intended to be limiting. For a person skilled in the art to which the invention pertains, several simple deductions, modifications or substitutions may be made according to the idea of the invention.

Claims

1. An endoscope camera communication cable, comprising:

2. The endoscopic camera communication cable of claim 1, wherein the shielding ring is a magnetic ring.

3. The endoscopic camera communication cable of claim 1, wherein the ends of the first connection terminal, the shield ring and the connection wire are secured within the first front sleeve by solid glue.

4. The endoscopic camera communication cable of claim 1, wherein said first connector is secured within said first front sleeve by solid glue, said shielding ring and the ends of the connecting wires being snapped within said first front sleeve.

5. An endoscopic camera communication cable according to claim 3 or 4, characterized in that said first front sleeve is provided with grooves and/or protrusions in the area filled with said solid glue.

6. The endoscopic camera communication cable of claim 5, wherein said groove is an annular groove and said protrusion is an annular protrusion.

7. The endoscope camera communication cable of claim 1, wherein an end of the first front sleeve distal to the first connection terminal is provided with a ferrule, and wherein the ferrule is engaged between the first front sleeve and the connection line.

8. The endoscope camera communication cable of claim 7, wherein said shield ring is positioned between said first connection terminal and a ferrule, an end of said shield ring distal from said first connection terminal abutting against said ferrule.

9. The endoscope camera communication cable of claim 7, wherein an end of the first front sleeve distal to the first connection terminal is provided with a locking hole, and a locking screw is installed in the locking hole, and the locking screw is used for locking the ferrule and the connection line in the first front sleeve.

10. The endoscope camera communication cable of claim 1, wherein the first connector further comprises a first rear tube, one end of the first rear tube is sleeved on an end of the first front sleeve away from the first connection terminal, and the connection line is inserted into the first rear tube.

11. The endoscopic camera communication cable of claim 10, wherein an interior narrowing of an end of said first rear tube distal to said first front sleeve forms an axial table, an end of said first front sleeve and an end of said ferrule abutting against the table in said first front sleeve.

12. The endoscope camera communication cable of claim 1, further comprising a second connector for connecting with a host, wherein an end of the connecting wire remote from the first connector is connected with the second connector.

13. An endoscope camera system, characterized by comprising a light source, a light guide bundle, an endoscope, an optical bayonet, a camera host, a display, a video connecting line and the endoscope camera communication cable according to any one of claims 1 to 11, wherein the light source is connected with the endoscope through the light guide bundle, one end of the camera is connected with the endoscope through the optical bayonet, the other end of the camera is connected with the camera host through the endoscope camera communication cable, and the camera host is connected with the display through the video connecting line.

14. The endoscopic camera system according to claim 13, wherein said camera head comprises:

15. The endoscopic imaging system according to claim 14, wherein the communication terminal and the first connection terminal are connected by a transition cable.

16. An endoscope camera system according to claim 14 and wherein said handle has a mounting socket formed on an end opening thereof, said mounting socket having a mounting hole communicating with said receiving cavity, said first connector fitting being received in said mounting hole of said handle mounting socket.

17. The endoscopic camera system according to claim 16, wherein said mount is of unitary construction with said handle.

18. An endoscopic camera system according to claim 16, wherein a locking sleeve is mounted to an end of said mounting seat, said locking sleeve locking said first connection terminal in said mounting seat.

19. An endoscope camera system according to claim 18 and wherein said locking collar is mounted at one end to said mounting block and a sealing ring is disposed between said locking collar and said mounting block.

20. An endoscope camera system according to claim 18 and wherein said first front sleeve has a narrowing portion at an outer circumference of an end thereof remote from said handle, said locking sleeve has a narrowing portion at an inner bore of an end thereof adjacent said mounting seat, and said narrowing portion of said first front sleeve is captured within said narrowing portion of said locking sleeve.