CN211460126U

CN211460126U - Traction spring tube with two sections of different hardness

Info

Publication number: CN211460126U
Application number: CN201922455018.1U
Authority: CN
Inventors: 谢民政; 谢梦蕾; 史健
Original assignee: Changzhou Yanshun Optoelectronics Technology Co ltd
Current assignee: Changzhou Yanshun Optoelectronics Technology Co ltd
Priority date: 2019-12-30
Filing date: 2019-12-30
Publication date: 2020-09-11
Anticipated expiration: 2029-12-30

Abstract

The utility model relates to a pull spring pipe with different soft or hard degrees of two-stage process, including the spring pipe body, its innovation point lies in: the spring tube body comprises a front section and a rear section which are connected into a whole, the front section is formed by winding round steel wires with circular cross sections, the rear section is formed by winding flat steel wires with rectangular cross sections, and the pitch P of the front section₁0.15 mm-0.70 mm, and the pitch P of the rear section₂0.20mm to 0.85mm, and P₁＜P₂. The utility model discloses have two sections different compliance, and improve the insertion performance.

Description

Traction spring tube with two sections of different hardness

Technical Field

The utility model relates to a pull spring pipe, concretely relates to medical soft endoscope's pull spring pipe that has the different soft or hard degree of two-section belongs to medical instrument technical field.

Background

Two or four steel wire ropes are pulled and dragged backwards to change the snake bone bending angle when the snake bone bending angle of the existing endoscope bending part is changed, because the two or four traction steel wire ropes are longer in length, and respectively penetrate through longer steel wire rope through holes of a miniature traction spring tube and then are connected with the end part of a chain wheel transmission system of an endoscope operation part into a whole, and the two ends of the miniature traction spring tube are fixed at the end parts inserted into tube holes. When a hand wheel of a rotating chain wheel transmission system is operated, the traction steel wire rope can be dragged and rotationally drawn, so that the endoscope probe bending angle is pulled.

In the prior art, the flexibility of the whole traction spring tube is the same, the traction rigidity of the spring tube wound by a steel wire with a circular section shape in an insertion tube of an endoscope is lower than that of the spring tube wound by a rectangular (squashing steel wire), but the rigidity of the traction spring tube wound by the steel wire with the rectangular section is too hard, and if the traction spring tube is too soft or too hard, the insertion performance is reduced, the insertion is difficult, or the traction spring tube is difficult to be inserted into the depth position of a cavity of a detected person. The effect of examining and diagnosing the medical endoscope for medical operation is influenced, after the traction spring tube and the insertion tube of the insertion part are assembled, the quality influence is exerted on the insertion tube with the segmented hardness of the original insertion part, for example, the bending effect of the segmented hardness of the whole insertion tube is influenced, and the insertion performance of the whole insertion part is influenced; meanwhile, as the close winding degree of the traction spring tube is low, gaps exist among the traction spring tube, and a plurality of spring rings move back and forth among the gaps, a part of traction force of the front and back traction of the steel wire rope is consumed, and the size of the bending angle of the bending part at the front end of the steel wire rope traction endoscope is obviously influenced.

Disclosure of Invention

The utility model aims at: the traction spring pipe with two sections of different softness and hardness is provided, and the insertion performance is improved.

In order to achieve the above purpose, the technical scheme of the utility model is that: the utility model provides a pull spring pipe with different soft or hard of two-stage process, includes the spring pipe body, and its innovation point lies in:

a. the spring tube body comprises a front section and a rear section which are connected into a whole,

b. the front section is formed by winding round steel wires with round cross sections, the rear section is formed by winding flat steel wires with rectangular cross sections,

c. pitch P of said front section₁0.15 mm-0.70 mm, and the pitch P of the rear section₂0.20mm to 0.85mm, and P₁＜P₂。

In the technical scheme, the total length L of the spring tube body is 390 mm-2100 mm, and the length L of the front section is₁195 mm-1050 mm, the length L of the rear section₂Is 195 mm-1050 mm.

In the above technical scheme, still include the spring connecting pipe, the anterior segment passes through the spring connecting pipe and welds as an organic whole with the back end.

In the above technical solution, the front section and the rear section are of an integral structure.

In the above technical solution, the aperture of the front section is the same as the aperture of the rear section, and the outer diameter Φ of the front section is the same as the outer diameter Φ of the rear section₁0.6mm to 3.3mm, the outer diameter phi of the rear section₂All are 0.45 mm-2.8 mm and phi₁＞Φ₂The front section is made of round steel wires with the diameter phi of 0.15 mm-0.7 mm, the wall thickness d of the rear section is 0.10 mm-0.55 mm, and the width W of the rear section is 0.20 mm-0.7 mm.

The utility model discloses the positive effect who has is: adopt the utility model discloses a behind the different soft or hard degrees of two-section traction spring pipe, because the spring pipe body includes anterior segment and back end, and anterior segment and back end are even as an organic whole, the anterior segment is convoluteed by the round steel wire of circle cross-section and constitutes, and the back end is convoluteed by the flat steel wire of rectangle cross-section and constitutes, the pitch P of anterior segment₁0.15 mm-0.70 mm, and the pitch P of the rear section₂0.20mm to 0.85mm, and P₁＜P₂The utility model discloses a draw the spring pipe and divide into two sections of softness difference, and the anterior segment is soft, and the back end is relative hard partially, and its anterior segment part that inserts the insert tube of patient's inner chamber earlier is softer than back end part, has improved the insertion performance, can prevent effectively that the mucosa that harms human body cavity way from can causing inner chamber wall congestion, improves simultaneously and draws the bent angle effect.

Drawings

Fig. 1 is a schematic structural diagram of a first embodiment of the present invention;

fig. 2 is a schematic structural diagram of a second embodiment of the present invention.

Detailed Description

The present invention will be further described with reference to the accompanying drawings and examples, but is not limited thereto.

Example 1

As shown in fig. 1, a traction spring tube with two sections of different hardness comprises a spring tube body 1,

a. the spring tube body 1 comprises a front section 11 and a rear section 12, the front section 11 and the rear section 12 are connected into a whole,

b. the front section 11 is formed by winding round steel wires with round cross sections, the rear section 12 is formed by winding flat steel wires with rectangular cross sections,

c. pitch P of said front section 11₁0.15 mm-0.70 mm, and the pitch P of the rear section₂0.20mm to 0.85mm, and P₁＜P₂。

Further, the total length L of the spring tube body 1 is 390 mm-2100 mm, the length L of the front section 11₁195 mm-1050 mm, the length L of the rear section 12₂Is 195 mm-1050 mm.

As shown in fig. 1, the front section 11 and the rear section 12 are integrated with each other, the pitch of the front section 11 is equal to the diameter of a round steel wire, and the pitch of the rear section 12 is equal to the width of a flat steel wire with a rectangular cross section.

As shown in FIG. 1, in order to make the structure of the present invention more reasonable, the aperture of the front section 11 is the same as that of the rear section 12, and the outer diameter phi of the front section 11₁0.6mm to 3.3mm, and the outer diameter phi of the rear section 12₂All are 0.45 mm-2.8 mm and phi₁＞Φ₂The front section 11 is made of round steel wires with the diameter phi of 0.15 mm-0.7 mm, the wall thickness d of the rear section 12 is 0.10 mm-0.55 mm, and the width W of the rear section is 0.20 mm-0.7 mm.

The preparation procedure of example 1 was: a) selecting a round steel wire as a processing raw material, calculating the total length of a spring tube according to design requirements, reserving the process length in processing, pressing the round steel wire with a certain length into a rectangular section on a flattening machine of a flat roller wheel in advance according to the design requirements, keeping the remaining round steel wire in an original state,

b) winding the steel wire in the step a on a small wire coil by using a wire winding machine,

c) the spring is wound on a special close-wound spring machine, a cylindrical steel wire head is fixed at one end of a slender core rod shaft of the spring machine, a section of spring for manufacturing the spring cylindrical steel wire material is tightly wound, namely, a relatively soft front section is processed firstly, then a rear section with harder winding hardness is continuously wound by a section of steel wire flattened in advance, and thus, the spring with two sections of different hardness degrees in front of soft and hard is completed.

Example 2

As shown in fig. 2, embodiment 2 differs from embodiment 1 in that: the utility model provides a pull spring pipe with different soft or hard degrees of two-stage process still includes spring coupling pipe 2, anterior segment 11 is as an organic whole through spring coupling pipe 2 and back end 12 welding.

The other structure of embodiment 2 is the same as embodiment 1.

The preparation procedure of example 2 was: the total length of a spring tube is calculated according to design requirements, a section of spring tube formed by winding round steel wires with a circular cross section is selected as the front section of the traction spring tube, a section of spring tube formed by winding flat steel wires with a rectangular cross section is selected as the rear section of the traction spring tube, finally, a thin stainless steel sleeve (or a copper sleeve) is sleeved at the joint of the two spring tubes, and the two traction rope spring tubes with different hardness are welded together by adopting high-frequency spot welding (or tin soldering).

The utility model discloses a draw the spring pipe and divide into two sections of softness difference, and the anterior segment is soft, and the back end is relative hard partially, and its anterior segment part that inserts the insert tube of patient's inner chamber earlier is softer than back end part, has improved the insertion performance, can prevent effectively that the mucosa that harms human chamber way from can causing inner chamber wall congestion, improves simultaneously and draws the bent angle effect.

In light of the foregoing, it will be apparent to those skilled in the art from this disclosure that various changes and modifications can be made without departing from the spirit and scope of the invention. The technical scope of the present invention is not limited to the content of the specification, and must be determined according to the scope of the claims.

Claims

1. The utility model provides a pull spring pipe with different soft or hard of two-stage process, includes spring pipe body (1), its characterized in that:

a. the spring tube body (1) comprises a front section (11) and a rear section (12), the front section (11) and the rear section (12) are connected into a whole,

b. the front section (11) is formed by winding round steel wires with round cross sections, the rear section (12) is formed by winding flat steel wires with rectangular cross sections,

c. the pitch P of the front section (11)₁0.15 mm-0.70 mm, and the pitch P of the rear section₂0.20mm to 0.85mm, and P₁＜P₂。

2. A draft spring tube according to claim 1 having two sections of different durometer hardness, wherein: the total length L of the spring tube body (1) is 390 mm-2100 mm, and the length L of the front section (11)₁195 mm-1050 mm, the length L of the rear section (12)₂Is 195 mm-1050 mm.

3. A draft spring tube according to claim 1 having two sections of different durometer hardness, wherein: still include spring connecting pipe (2), anterior segment (11) are as an organic whole through spring connecting pipe (2) and back end (12) welding.

4. A draft spring tube according to claim 1 having two sections of different durometer hardness, wherein: the front section (11) and the rear section (12) are of an integrated structure.

5. A draft spring tube according to claim 1 having two sections of different durometer hardness, wherein: holes of the front section (11)The diameter is the same as the diameter of the rear section (12), and the outer diameter phi of the front section (11)₁0.6mm to 3.3mm, the outer diameter phi of the rear section (12)₂All are 0.45 mm-2.8 mm and phi₁＞Φ₂The front section (11) is made of round steel wires with the diameter phi of 0.15 mm-0.7 mm, the wall thickness d of the rear section (12) is 0.10 mm-0.55 mm, and the width W is 0.20 mm-0.7 mm.