CN213216866U

CN213216866U - Long densely-wound spring used in gastroscope protective tube and gastroscope using same

Info

Publication number: CN213216866U
Application number: CN202021330746.6U
Authority: CN
Inventors: 黄铁治; 李春雷; 侯耀华; 谭南平
Original assignee: Ningbo Mingpin Metal Products Co Ltd
Current assignee: Ningbo Mingpin Metal Products Co Ltd
Priority date: 2020-07-09
Filing date: 2020-07-09
Publication date: 2021-05-18
Anticipated expiration: 2030-07-09

Abstract

The utility model discloses an elongated is close around spring and has used this elongated close gastroscope around spring for among gastroscope protective tube, including the spring body, the spring body is formed by a plurality of steel wire coil close winds, and when the spring body was compressed to the limit value, two adjacent steel wire coil can hug closely together, on the operating portion of gastroscope was connected to spring body one end, the other end was provided with mounting fixture, mounting fixture can draw in the tip of spring body the middle section cover of spring body is equipped with the relay fixed block, be formed with the mounting hole on the relay fixed block, the outer wall of spring body is hugged closely the inner wall of mounting hole be formed with the cavity in the spring body, be provided with the cable in the cavity, the cable can be crooked along with the spring body.

Description

Long densely-wound spring used in gastroscope protective tube and gastroscope using same

Technical Field

The utility model relates to a steel wire goods technical field especially relates to an elongated is close around spring and uses this elongated close around gastroscope of spring for among the gastroscope protective sheath.

Background

In the related art, a gastroscope has been widely used in the field of medical diagnosis, and generally includes an operation portion gripped and operated by a doctor and an insertion portion connected to the operation portion to be inserted into a stomach cavity, the operation portion and the insertion portion being connected by a connector having a cable built therein, a micro camera being provided on the insertion portion, one end of the cable being connected to the camera and the other end extending to the operation portion along with the connector and being connected to a light source device or a processor device.

The insertion portion of the gastroscope has a flexible portion so that it can be inserted into a complexly curved gastric pathway.

However, it is also because the insertion portion of the gastroscope has flexibility, so that it is difficult for the operator to control the direction of the leading end side of the insertion portion completely, i.e., to control the insertion of the insertion portion in the target direction. In view of the above, in the prior art, in chinese invention patent No. CN 201110254802.1, the applicant, japan fuji film corporation, discloses an endoscope including: a hardness adjusting device that changes the flexibility of the flexible portion of the endoscope insertion unit; and a manipulation member that manipulates the hardness adjustment device. The manipulation member is positioned in a region where the manipulation member can be manipulated with one hand of an operator holding a handheld operation unit of the endoscope, the region being located at an upper portion of the handheld operation unit. The contact spring extends from a front end of the handheld operation unit to an upper portion of the handheld operation unit, and the front end of the handheld operation unit is connected to the flexible portion.

According to the specification, the contact spring is arranged, the spring is compressed or stretched by the hardness adjusting device, when the coils of the spring are in a tightly compressed state, the coils are tightly attached, so that the hardness of the connecting pipe is improved, and conversely, when the spring is in a relaxed state, the gaps among the coils are larger, so that the connecting pipe can be easily bent, namely, the hardness of the connecting pipe is lower.

However, the above-mentioned patent solutions also have a problem that, if the spring is in a bent state when the spring is compressed, the middle section of the spring is subjected to a radial deformation force in addition to a compression force for approaching the adjacent coil, so that the middle section of the spring is subjected to a transverse plastic deformation, which causes a decrease in the elastic durability of the spring, and the elastic failure is likely to occur after a plurality of compressions, thereby shortening the service life of the entire gastroscope protection tube.

SUMMERY OF THE UTILITY MODEL

The technical problem to be solved by the utility model is to provide an elongated close-wound spring for gastroscope protection tube aiming at the technical situation.

In order to achieve the above purpose, the utility model provides a following technical scheme:

the utility model provides a long type is close around spring for among gastroscope pillar, is including the spring body, and the spring body is formed by a plurality of steel wire coil close winds, and when the spring body was compressed to the limit value, two adjacent steel wire coils can hug closely together, spring body one end is connected on the operating portion of gastroscope, and the other end is provided with mounting fixture, mounting fixture can draw in the tip of spring body in the middle section cover of spring body is equipped with the relay fixed block, be formed with the mounting hole on the relay fixed block, the outer wall of spring body is hugged closely the inner wall of mounting hole be formed with the cavity in the spring body, be provided with the cable in the cavity, the cable can be crooked along with the spring body.

As an improvement of the present invention, a metal wire is inserted into the spring body.

The utility model provides an adopted gastroscope of above-mentioned elongated close-wound spring, including operation portion and insert tube, the insert tube is connected the front end of operation portion, the inside cavity of insert tube is formed with the installation cavity, the insert tube includes hose, crooked pipe and stereoplasm front end, the pipe wall of hose is made by soft materials, crooked union coupling is in the front end of hose, the stereoplasm front end is fixed in the front end of crooked pipe, the stereoplasm front end is the fixed block, embeds there is the elongated close-wound spring in the installation cavity, is formed with the step face on the joint inner wall of crooked pipe and hose, and the tip of spring is provided with mounting fixture, the mounting fixture centre gripping is on the step face, is being equipped with the relay fixed block in the middle section cover of elongated close-wound spring set up the cavity in the elongated close-wound spring wear to be equipped with the wire in the cavity, wire one end is connected on the stereoplasm front end, the other end extends in the operating portion.

Preferably, the soft material is polyurethane.

As an improvement of the present invention, a piston is provided in the operation unit, the piston is capable of being driven to slide back and forth in the operation unit, the rear end of the long close-wound spring is fixed to the piston, the long close-wound spring is compressed by advancing the piston toward the front end side, and the long close-wound spring is returned from the compressed state to the initial state by retreating the piston toward the rear end side.

As a further improvement of the present invention, a guide groove is provided on the side wall of the operation portion, a cam pin is formed outside the piston, the cam pin can slide along the guide groove, and the guide groove can limit the sliding stroke of the piston.

As a further improvement of the utility model, the cam ring is being established to the outside cover of operation portion, and the end fixing of cam pin is on the cam ring, through sliding the cam ring along operation portion outer wall, can drive the reciprocal feed of piston.

As the utility model discloses a preferred, crooked pipe embeds there is a plurality of angle rings, has seted up the base hole on crooked pipe's inner wall, wears to be equipped with the round pin in the base hole, has all seted up the pinhole in the top and the bottom of angle ring, also rotates through the round pin to connect between two adjacent angle rings, and the angle ring on top passes through the round pin rotates to be connected on the base hole.

Compared with the prior art, the utility model has the advantages of: the middle section of the spring is sleeved with a relay fixing block, the relay fixing block can restrain the middle section of the spring, in addition, the insertion tube comprises a bent tube, the bent tube comprises a plurality of rotatably connected angle rings, and the angle rings can replace the spring to change the bending angle of the bent tube, so that the spring avoids a region with larger bending amplitude, and the middle section of the spring is prevented from radial deformation to cause the reduction of the durability of the spring.

Drawings

FIG. 1 is a cross-sectional view of a gastroscope with an elongated close-wound spring in an embodiment of the present invention;

fig. 2 is a partial structural view of the curved tube portion of fig. 1.

Detailed Description

The present invention will be described in further detail with reference to the following embodiments.

As shown in the attached drawings, the embodiment is an elongated close-wound spring used in a gastroscope protective tube and a gastroscope, the gastroscope comprises an operation part 1 and an insertion tube 2, the operation part is always positioned outside a human body, the operation part comprises a shell, a guide groove 3 is formed in the side wall of the shell, a cavity is formed in the operation part in a hollow mode, a piston 4 is arranged in the cavity, a cam pin 5 is formed on the outer ring of the piston, the cam pin penetrates through the guide groove, the end portion of a cam shaft extends out of the guide groove, the cam pin can slide along the guide groove, the diameter of the cam pin is consistent with the groove width of the guide groove, and the design can prevent the cam pin from vibrating in the sliding process due to the fact that the gap between the cam pin and the groove wall of the guide groove is too large. The length of the guide groove is the stroke of the piston, and the two ends of the guide groove can limit the sliding stroke of the piston.

The insertion tube is connected to the front end of the operation part, a mounting cavity is formed in the insertion tube in a hollow mode, the insertion tube comprises a flexible tube 21, a bent tube 22 and a hard front end 23, the flexible tube is made of polyurethane materials, the bent tube is connected to the front end of the flexible tube, the hard front end is fixed to the front end of the bent tube, the hard front end is a fixed block, an elongated close-wound spring (spring body) 6 is arranged in the mounting cavity, the rear end of the elongated close-wound spring is fixed to a piston in the operation part, a fixing clamp 7 is sleeved on the front end of the elongated close-wound spring, the rear end of the elongated close-wound spring is fixed to the piston, the elongated close-wound spring is compressed by advancing the piston towards the front end side, and the elongated close-wound spring returns to an initial state from a compressed state by retreating the piston towards.

The step surface 8 is formed on the inner wall of the joint of the bent pipe and the hose, the fixing clamp is clamped on the step surface, the relay fixing block 9 is sleeved on the middle section of the long type tightly wound spring, a cavity is formed in the long type tightly wound spring, a cable (not shown in the figure) is arranged in the cavity, the cable is tightly attached to the cavity wall of the cavity, the cable can be bent along with the spring body, a metal wire 10 penetrates through the cavity and penetrates through the cable, one end of the metal wire is connected to the hard front end (the fixing block), the other end of the metal wire extends to the operating part, particularly, a pull ring 16 is arranged at the rear end of the metal wire, a hole is formed in the rear part of the shell, the metal wire penetrates through the hole in the rear part of the shell and extends out, the whole bathroom shell of the pull ring is outside, the metal wire can be tensioned. That is, in this embodiment, the spring and wire are controlled by the pull ring and cam pin, respectively. In order to facilitate the sliding of the cam pin by the user, a cam ring 11 is fitted around the outside of the operating portion, i.e., the outer wall of the housing, and the end of the cam pin is fixed to the cam ring, and the piston is driven to reciprocate by sliding the cam ring along the outer wall of the operating portion. The long tightly wound spring is formed by tightly winding a plurality of steel wire coils, and when the spring body is compressed to the limit value, two adjacent steel wire coils can be tightly attached together

A plurality of angle rings 12 are arranged in the bent pipe, a base hole 13 is formed in the inner wall of the bent pipe, a pin penetrates through the base hole, pin holes 14 are formed in the top and the bottom of each angle ring, two adjacent angle rings are rotatably connected through the pin, and the angle ring on the uppermost part is rotatably connected to the base hole through the pin. When pulling the wire, can produce traction force to the fixed block, this traction force makes the fixed block can produce the trend that rises, utilizes this trend to make the crooked pipe crooked by a wide margin, and the bending by a wide margin of crooked pipe makes mutual rotation rotate with the cooperation between the angle ring, replaces the spring by the angle ring for the spring can not take place to crooked by a wide margin, has reduced the radial deformation of spring promptly, has prolonged its life. However, it should be noted that in this embodiment, only the mutual matching between the angle rings is used to replace the bending of the spring, and the spring in the hose portion is still bent to a small extent, so a cover ring 15 is further disposed between the hose and the operation portion, the upper edge of the cover ring forms a turn of flanging radially outward, the bottom of the operation portion housing forms an inward flange, the flanging is attached to the flanging, when the spring in the hose is bent to a large angle due to an abnormal spring, the cover ring is acted on to generate a swinging trend, and the attachment of the flanging to the flanging can provide resistance to the swinging trend to suppress the swinging trend.

The manufacturing process of the long tightly wound spring in the embodiment generally includes the steps of performing a planning project, such as wire rod drawing and the like, to prepare a blank, then performing plastic deformation to form a spring body, and finally performing surface processing to form a finished product of the long tightly wound spring. The tensile strength of the finished product is controlled between 2050 and 2150MPa, the deviation of the diameters of the head and the tail of the same piece of material is within 20mm, and the horizontal elastic height is 0 mm.

It is above only the utility model discloses a preferred embodiment, the utility model discloses a scope of protection does not only confine above-mentioned embodiment, the all belongs to the utility model discloses a technical scheme under the thinking all belongs to the utility model discloses a scope of protection. It should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.

Claims

1. An elongated, densely wound spring for use in a gastroscope guard, comprising: including the spring body, the spring body is formed by a plurality of steel wire coils are densely wound, and when the spring body was compressed to the limit value, two adjacent steel wire coils can hug closely together, spring body one end is connected on the operating portion of gastroscope, and the other end is provided with mounting fixture, mounting fixture can draw in the tip of spring body the middle section cover of spring body is equipped with the relay fixed block, be formed with the mounting hole on the relay fixed block, the outer wall of spring body is hugged closely the inner wall of mounting hole be formed with the cavity in the spring body, be provided with the cable in the cavity, the cable can be along with the spring body bending.

2. An elongated, densely wound spring for use in a gastroscope guard according to claim 1 wherein: a wire is inserted into the spring body.

3. A gastroscope employing an elongate close-wound spring according to claim 1 wherein: comprises an operation part and an insertion tube, wherein the insertion tube is connected with the front end of the operation part, an installation cavity is formed in the hollow part of the insertion tube, the insertion tube comprises a soft tube, a bent tube and a hard front end, the tube wall of the soft tube is made of soft materials, the bending pipe is connected with the front end of the hose, the hard front end is fixed at the front end of the bending pipe and is a fixed block, a long tightly wound spring is arranged in the mounting cavity, a step surface is formed on the inner wall of the joint part of the bending pipe and the hose, a fixing clamp is arranged at the end part of the spring and is clamped on the step surface, a relay fixing block is sleeved on the middle section of the long tightly wound spring, a cavity is arranged in the long tightly wound spring, a wire is threaded through the cavity, one end of the wire is connected to the hard front end, and the other end of the wire extends into the operation portion.

4. The gastroscope of claim 3, wherein: the soft material is polyurethane.

5. The gastroscope of claim 3, wherein: the operating unit includes a piston that is slidably driven in the operating unit in the axial direction, the rear end of the long close-wound spring is fixed to the piston, the piston is advanced toward the front end side to compress the long close-wound spring, and the piston is retracted toward the rear end side to return the long close-wound spring from the compressed state to an initial state.

6. The gastroscope of claim 5, wherein: the side wall of the operation part is provided with a guide groove, a cam pin is formed outside the piston and can slide along the guide groove, and the guide groove can limit the sliding stroke of the piston.

7. The gastroscope of claim 6, wherein: the cam ring is sleeved outside the operation part, the end part of the cam pin is fixed on the cam ring, and the piston can be driven to feed in a reciprocating mode by sliding the cam ring along the outer wall of the operation part.

8. The gastroscope of claim 3, wherein: the bending pipe is internally provided with a plurality of angle rings, a base hole is formed in the inner wall of the bending pipe, a pin penetrates through the base hole, pin holes are formed in the top and the bottom of each angle ring, every two adjacent angle rings are rotatably connected through the pin, and the uppermost angle ring is rotatably connected to the base hole through the pin.