Endoscope body steel wire fixing structure and endoscope

Abstract

The present invention discloses an endoscope body wire fixing structure and an endoscope, wherein the wire fixing structure comprises a connecting block and a sleeve which are fixedly connected to each other, wherein a steel wire is passed through the sleeve, and the outer end of the steel wire is fixed to the outer end of the sleeve by soldering; a screw plug which is sleeved on the outer periphery of the steel wire is also screwed on the connecting block, and the screw plug is provided with an elastic fixing sleeve which is sleeved on the steel wire through a tapered hole; the large end of the tapered hole of the elastic fixing sleeve faces the sleeve; and the elastic fixing sleeve freely rests against the inner end of the sleeve. The endoscope comprises a body, and the body and a chain are connected by a connecting block, a sleeve and a steel wire; the steel wire and the connecting block are fixed by the aforementioned wire fixing structure. The beneficial effects of the present invention are that the steel wire fixing structure has a simple structure and reliable functions; and an endoscope having the fixing structure does not have the hidden dangers of being unable to change posture and being difficult to withdraw.

Description

Technical Field

[0001] The invention relates to an endoscope structure, in particular to an endoscope body steel wire fixing structure and an endoscope. Background Art

[0002] Endoscope systems are widely used in the medical field and usually consist of a light guide, a universal cable, an operating unit, an insertion unit, a bending unit, and a head. The bending unit is generally controlled by four steel wires through two hand wheels of the operating unit to control the movement in the four directions of up, down, left, and right. When the endoscope body is inserted into the human body, it is required that no matter what kind of failure occurs, the endoscope can be safely withdrawn from the human body and the endoscopic examination can be completed as much as possible. When the operating hand wheel is turned, the gear is driven to rotate, the gear drives the chain to move, the chain drives the wire assembly to move, and the wire assembly controls the bending unit to perform the bending action.

[0003] The steel wire fixing structure in the steel wire assembly in the prior art includes a steel wire, which passes through a sleeve and is fixed to the steel wire and the sleeve by soldering. The sleeve is arranged on a connecting block, and the connecting block is connected to a chain. However, after being used for a period of time, the weld at the fixed end of the steel wire of the existing endoscope may break or even fall off due to wear, aging, etc. If the soldering weld breaks when the insertion part of the scope is inside the human body and the bending part is at the maximum bending angle or a large angle, there is a risk that the bending of the bending part cannot be controlled, and endoscopic observation cannot be continued, and there is even a risk that it is difficult to withdraw from the human body cavity. For this reason, improvements are needed. Summary of the invention

[0004] The first purpose of the present invention is to provide an endoscope body wire fixing structure to address the defect that the existing endoscope body wire fixing structure cannot be bent or is difficult to enter the human body cavity when the soldering weld is broken. The fixing structure is provided with a wire clamping member between the steel wire and the connecting block, and the steel wire is fixed to the connecting block through a double fixing structure. After the weld is broken or detached, the steel wire and the connecting block are fixed by the wire clamping member, and the bending deformation can be performed, and the endoscope body can be conveniently and calmly withdrawn from the cavity. The second purpose of the present invention is to provide an endoscope with the above-mentioned wire fixing structure.

[0005] To achieve the first purpose, the present invention adopts the following technical solution.

[0006] A steel wire fixing structure for an endoscope body comprises a connecting block and a sleeve, wherein a steel wire is passed through the sleeve, and the outer end of the steel wire is fixed to the outer end of the sleeve by a soldering weld; a screw plug which is sleeved on the outer periphery of the steel wire is also screwed on the connecting block, and an elastic fixing sleeve which is sleeved on the steel wire is provided through a tapered hole of the screw plug; the large end of the tapered hole of the elastic fixing sleeve faces the sleeve; and the elastic fixing sleeve freely rests against the inner end of the sleeve.

[0007] In the present invention adopting the above-mentioned technical solution, the outer end of the steel wire is fixed on the sleeve by soldering, and is indirectly fixed on the connecting block; at the same time, the screw plug that is screwed on the connecting block and sleeved on the outer periphery of the steel wire is provided with an elastic fixing sleeve sleeved on the steel wire through its tapered hole, so that by twisting the screw plug, the radial component of the axial movement of the cone surface applies a radial force to the elastic fixing sleeve, so that the inner hole of the elastic fixing sleeve shrinks and holds the steel wire tightly. Thus, the steel wire and the connecting block form a double fixing structure, so that after the weld as the main fixing structure breaks or falls off and fails, the clamping structure as the auxiliary fixing structure can be used to keep the steel wire and the connecting block in a fixed connection relationship; when used in an endoscope system, a double insurance structure is formed, which can meet the bending required by the steel wire assembly and the related operations such as withdrawing the scope from the cavity when the weld breaks or falls off and fails. It has a simple structure and reliable function. When used in an endoscope, it can eliminate the risk that the lens cannot change its posture or is difficult to withdraw from the cavity.

[0008] Preferably, the elastic fixing sleeve is a C-shaped open sleeve structure. With the elastic structure formed by the C-shaped open sleeve, when the inner wall of the screw plug cone hole squeezes the C-shaped sleeve, its inner hole shrinks to form a tight embrace for the steel wire, and can be made of relatively high strength and hardness materials to extend the service life.

[0009] Further preferably, the elastic fixing sleeve is made of an elastic resin material, so as to further improve the clamping firmness by utilizing the elasticity of the resin.

[0010] More preferably, the resin material includes polycarbonate and nylon, so as to fully utilize the large friction coefficient between polycarbonate and nylon and the steel wire and the wear resistance to ensure the clamping firmness and prolong the service life.

[0011] Preferably, the elastic fixing sleeve is an annular bushing structure and is made of an elastic material with an aggregate added to improve strength, so that the elastic fixing sleeve is made of an elastic material with relatively weak strength but a larger friction coefficient with the steel wire to ensure the firmness of the connection, and the strength is enhanced by adding aggregates to increase the service life.

[0012] Further preferably, the aggregate is glass fiber, and the elastic material is made of rubber or TPE, so that the elastic fixing sleeve can be manufactured using materials that are easy to obtain and relatively low in cost, thereby reducing the manufacturing cost.

[0013] Preferably, a monitoring alarm device is provided between the sleeve and the steel wire, and the monitoring alarm device is used to send an alarm signal after detecting cracking, breaking or falling off of the soldering. In order to monitor the quality of the weld between the steel wire and the sleeve in real time, and to give an alarm in time after the quality problem of cracking, breaking or falling off occurs, so as to take remedial measures, such as repairing or limiting the number of times the endoscope is used. Since the service life of the elastic fixing sleeve is relatively short compared to soldering, when the steel wire is fixed only by the elastic fixing sleeve, it is usually necessary to limit the number of times it is used to prevent the phenomenon of being unable to bend or difficult to exit the cavity. In the scheme with an alarm device, the elastic sleeve can also be fixed as an emergency measure. Before the alarm, the screw plug does not press the elastic sleeve, and the steel wire is only fixed by the weld. After the alarm occurs, the screw plug is tightened to press the elastic sleeve, and the elastic sleeve hugs the steel wire to form a relay working state.

[0014] Preferably, the monitoring alarm device detects the resistance value between the sleeve and the steel wire in real time, and triggers an alarm when the resistance value increases to a set value. By monitoring the resistance change value, it is possible to determine whether the solder is cracked or broken, or even falls off; the alarm threshold can be set to trigger an alarm when the solder is cracked; the alarm signal can be used to form a relay working state when the solder and the elastic clamp are tightened, thereby further improving reliability.

[0015] To achieve the second purpose, the present invention adopts the following technical solution.

[0016] An endoscope comprises a scope body, wherein the scope body and a chain are connected via a connecting block, a sleeve and a steel wire; a steel wire fixing structure is used between the steel wire and the connecting block to achieve the first invention objective.

[0017] The present invention adopts the above-mentioned technical solution and makes full use of the steel wire fixing structure to form a reliable fixation between the scope and the chain, which can effectively eliminate the hidden dangers that the endoscope scope cannot change its posture through the steel wire and is not easy to withdraw from the cavity during surgery.

[0018] The beneficial effects of the present invention are that the steel wire fixing structure is simple in structure and reliable in function; the endoscope with the fixing structure does not have the hidden dangers of being unable to change posture and being difficult to withdraw. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a partial structural schematic diagram of the endoscope in the present invention.

[0020] Figure 2 It is a structural schematic diagram of a screw plug in the steel wire fixing structure of the present invention.

[0021] Figure 3 It is a front view of the structural schematic diagram of the elastic fixing sleeve in the steel wire fixing structure of the present invention.

[0022] Figure 4It is a cross-sectional schematic diagram of an elastic fixing sleeve in a steel wire fixing structure of the present invention that is a C-shaped open sleeve.

[0023] Figure 5 It is a partial structural schematic diagram of the steel wire fixing structure in the present invention. DETAILED DESCRIPTION

[0024] The present invention will be further described below in conjunction with the accompanying drawings, but the present invention is not limited to the scope of the described embodiments.

[0025] Example 1, see Figure 1 , Figure 2 , Figure 3 A steel wire fixing structure for an endoscope body comprises a connecting block 1 and a sleeve 2 arranged on the connecting block 1, the outer end of the sleeve 2 is provided with a flange for abutting against the connecting block 1, a steel wire 3 is passed through the sleeve 2, and the outer end of the steel wire 3 is fixed to the outer end of the sleeve 2 by solder 4; a screw plug 5 is also screwed on the connecting block 1 and sleeved on the outer periphery of the steel wire 3, and the screw plug 5 is provided with an elastic fixing sleeve 6 sleeved on the steel wire 3 through a tapered hole; the large end of the tapered hole of the elastic fixing sleeve 6 faces the sleeve 2; the elastic fixing sleeve 6 freely abuts against the inner end of the sleeve 2, and a guiding outer cone is formed at the end of the elastic fixing sleeve 6 facing the small end of the tapered hole.

[0026] See also Figure 4 The elastic fixing sleeve 6 is in a C-shaped open sleeve structure and is made of an elastic resin material, which includes polycarbonate and nylon.

[0027] See also Figure 5 As a preferred solution, a monitoring alarm device 8 is provided between the sleeve 2 and the steel wire 3, and the monitoring alarm device 8 is used to send out an alarm signal after detecting that the solder 4 is broken or detached. The monitoring alarm device 8 detects the resistance value between the sleeve 2 and the steel wire 3 in real time, and triggers an alarm when the resistance value increases to a set value. The alarm signal can be an audio signal or a light signal, or an acousto-optic alarm signal combined with sound and light.

[0028] When the present embodiment is used, the screw plug 5 is tightened so that its tapered hole axially pushes the elastic fixing sleeve 6, and the outer cylindrical surface 6b of the elastic fixing sleeve 6 radially contracts under the action of the inner tapered surface of the tapered hole, and the corresponding inner hole 6a and opening 6c are correspondingly reduced by structural elasticity, thereby forming a tight embrace for the steel wire 3.

[0029] Example 2, see Figure 1 , Figure 2 , Figure 3 , combined with Figure 5 , an endoscope body wire fixing structure, wherein the elastic fixing sleeve 6 is an annular bushing structure and is made of elastic materials such as rubber or TPE added with glass fiber aggregate to improve strength.

[0030] The rest of the structure of this embodiment is the same as that of Embodiment 1 and will not be described again.

[0031] When the present embodiment is used, the screw plug 5 is tightened to cause its tapered hole to axially push the elastic fixing sleeve 6. The outer cylindrical surface 6b of the elastic fixing sleeve 6 contracts radially under the action of the inner tapered surface of the tapered hole, and the inner hole 6a shrinks accordingly due to the elasticity of the material, thereby forming a tight embrace for the steel wire 3.

[0032] Example 3, see Figure 1 An endoscope includes a scope body, wherein the scope body and a chain 7 are connected via a connecting block 1, a sleeve 2 and a steel wire 3; the steel wire 3 and the connecting block 1 adopt the steel wire fixing structure of embodiment 1 or 2.

[0033] The above shows and describes the basic principles and main features of the present invention and the advantages of the present invention. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention to be protected. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. An endoscope body wire fixing structure, comprising a connecting block (1) and a sleeve (2), wherein a steel wire (3) is inserted into the sleeve (2), and the outer end of the steel wire (3) is fixed to the outer end of the sleeve (2) through a soldering weld (4); characterized in that: The connection block (1) is also threaded with a screw plug (5) sleeved on the outer circumference of the steel wire (3); the screw plug (5) is provided with an elastic fixing sleeve (6) through a tapered hole, and the elastic fixing sleeve (6) is sleeved on the steel wire (3); the large end of the tapered hole of the elastic fixing sleeve (6) faces the sleeve (2); the elastic fixing sleeve (6) freely abuts against the inner end of the sleeve (2), and the elastic fixing sleeve (6) is a C-shaped open sleeve structure; a monitoring alarm device (8) is provided between the sleeve (2) and the steel wire (3), and the monitoring alarm device (8) is used to send out an alarm signal after detecting that the soldering weld (4) is cracked or detached; the monitoring alarm device (8) detects the resistance value between the sleeve (2) and the steel wire (3) in real time, and generates an alarm signal based on the resistance value. When the pressure increases to a set value, an alarm is triggered; the outer end of the steel wire (3) is fixed to the sleeve (2) through a soldering weld (4), and is indirectly fixed to the connecting block (1); at the same time, a screw plug (5) is screwed on the connecting block (1) and sleeved on the outer periphery of the steel wire (3), and an elastic fixing sleeve (6) sleeved on the steel wire (3) is provided through its tapered hole, so that by twisting the screw plug (5), a radial component of the axial movement of the inner conical surface of the tapered hole applies a radial force to the elastic fixing sleeve (6), so that the inner hole of the elastic fixing sleeve (6) contracts to hold the steel wire (3), so that the steel wire (3) and the connecting block (1) form a double fixing structure, so that after the soldering weld (4) falls off and fails, the steel wire (3) and the connecting block (1) can still maintain a fixed connection relationship.

2. The endoscope body wire fixing structure according to claim 1, characterized in that: The elastic fixing sleeve (6) is made of elastic resin material.

3. The endoscope body wire fixing structure according to claim 2, characterized in that: The resin material includes polycarbonate and nylon.

4. An endoscope, comprising a body, wherein the body and a chain (7) are connected via a connecting block (1), a sleeve (2) and a steel wire (3); characterized in that: The steel wire (3) and the connecting block (1) are connected by a steel wire fixing structure as claimed in any one of claims 1 to 3.

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