A serpentine bone mechanism and laryngoscope

Abstract

This utility model discloses a snake-bone mechanism and a laryngoscope. The snake-bone mechanism includes multiple snake-bone units, each with a connecting portion. A first preset distance exists between the connecting portion and the centerline in the height direction of the snake-bone unit. Adjacent snake-bone units are hinged together at their connecting portions. The connecting portion of the snake-bone unit in this utility model is located on one side of the centerline of the snake-bone unit. When pulling the traction rope with the same force as existing snake-bone mechanisms, this utility model's snake-bone mechanism can overcome greater resistance on the side of the snake-bone unit without a connecting portion on the centerline, thus meeting the needs of endoscopic medical devices for more application scenarios.

Description

Technical Field

[0001] This utility model relates to the field of endoscopy, and more specifically, to a snake bone mechanism and a laryngoscope. Background Technology

[0002] Snake-bone mechanisms are commonly used in endoscopic medical instruments such as endoscopes or laryngoscopes that require flexible bending and precise guidance. By pulling on different traction ropes installed on the snake-bone mechanism, it can bend in two opposite directions, thus allowing it to move upwards or downwards.

[0003] The snake-bone mechanism comprises multiple articulated snake-bone units. For example... Figure 1 As shown, the hinge 10' of the existing snake bone unit 1' is located at the center line position in its height direction. When force is applied to the snake bone mechanism by different traction ropes, the resistance that the snake bone mechanism can overcome when bending in two opposite directions is the same.

[0004] The serpentine mechanism of common endoscopes requires only a small amount of resistance to bend. However, for certain endoscopes with specific applications, the serpentine mechanism requires only a small amount of resistance to bend in one direction, but a larger amount of resistance to bend in the other. For example, in a laryngoscope used for endotracheal intubation, when the serpentine mechanism bends upwards, the tip needs to lift the collapsed soft tissue of the pharynx or the posteriorly fallen tongue root by engaging the tongue depressor at the tip of the laryngoscope. In this case, the upward movement of the serpentine mechanism requires overcoming greater resistance, while bending in the opposite direction requires only a small amount of resistance. In this situation, existing serpentine mechanisms with the same bending capacity in both directions have the problem of being difficult or even impossible to pull the traction rope in the direction requiring greater resistance.

[0005] Therefore, how to provide a snake-bone mechanism that can overcome significant resistance in the demand direction has become a pressing technical challenge in this field. Utility Model Content

[0006] One objective of this invention is to provide a new technical solution for a snake-bone mechanism that can overcome significant resistance in the desired direction.

[0007] According to a first aspect of the present invention, a snake-bone mechanism is provided.

[0008] The snake-bone mechanism includes multiple snake-bone units, each with a connecting portion. The connecting portion has a first preset distance from the center line in the height direction of the snake-bone unit, and the connecting portions of adjacent snake-bone units are hinged together.

[0009] Optionally, the connecting part is provided with a hinge hole, and there is a second preset distance between the geometric center of the hinge hole and the center line of the snake bone unit in the height direction.

[0010] Optionally, the second preset distance between the geometric center of the hinge hole and the centerline of the snake bone unit in the height direction is 10%-40% of the height of the snake bone unit.

[0011] Optionally, the cross-section of the snake-bone unit is circular, elliptical, square, or trapezoidal.

[0012] Optionally, the inner wall of the snake-bone unit is provided with a traction rope channel.

[0013] Optionally, the snake-bone unit has a clearance portion located on at least one side of the connecting portion in the height direction.

[0014] Optionally, the plurality of snake bone units include a head-end snake bone unit, which has a connection area for connecting to a traction rope.

[0015] Optionally, at least one annular protrusion is provided on the outer wall surface of the head-end snake bone unit; or,

[0016] The plurality of snake bone units also include a tail snake bone unit, and at least one annular protrusion is provided on the outer wall surface of the head snake bone unit and the tail snake bone unit.

[0017] Optionally, the connecting portion is further provided with a first limiting portion for limiting the rotation angle of adjacent snake bone units.

[0018] Optionally, the snake-bone unit is further provided with a connector, which is disposed on the wall of the snake-bone unit, and the connecting part is located on the connector.

[0019] Optionally, the connector is provided with a second limiting part for limiting the rotation angle of adjacent snake bone units.

[0020] According to a second aspect of the present invention, a laryngoscope is provided.

[0021] The laryngoscope includes the snake bone mechanism described in this invention.

[0022] The connecting part of the snake bone unit of the snake bone mechanism provided by this utility model is located on one side of the center line of the snake bone unit. When the same force is used to pull the traction rope as the existing snake bone mechanism, the snake bone mechanism of this utility model can overcome greater resistance on the side of the center line of the snake bone unit where the connecting part is not located, thus meeting the needs of endoscopic medical devices for more usage scenarios.

[0023] Other features and advantages of the present invention will become clear from the following detailed description of exemplary embodiments of the present invention with reference to the accompanying drawings. Attached Figure Description

[0024] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments of the present invention and, together with their description, serve to explain the principles of the present invention.

[0025] Figure 1 This is a structural diagram of an existing snake-bone mechanism embodiment.

[0026] Figure 2 This is a schematic diagram of the structure of an embodiment of the snake-bone mechanism of this utility model.

[0027] Figure 3 This is a schematic diagram of the snake bone unit from one perspective, representing an embodiment of the snake bone mechanism of this utility model.

[0028] Figure 4 for Figure 3 The front view.

[0029] Figure 5 This is a schematic diagram of the snake bone unit from another perspective, representing an embodiment of the snake bone mechanism of this utility model.

[0030] Figure 6 This is a schematic diagram of the head end snake bone unit of an embodiment of the snake bone mechanism of this utility model.

[0031] The diagram is labeled as follows: snake bone unit-1', hinge part-10', snake bone unit-1, connecting part-11, hinge hole-111, pulling rope channel-12, avoidance part-13, connecting piece-14, second limiting part-140, head end snake bone unit-2, connecting area-20, tail end snake bone unit-3. Detailed Implementation

[0032] Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. It should be noted that, unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps set forth in these embodiments do not limit the scope of the present invention.

[0033] The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit the invention or its application or use.

[0034] Techniques, methods, and equipment known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and equipment should be considered part of the specification.

[0035] In all the examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values.

[0036] like Figures 2 to 6As shown, the snake-bone mechanism provided by this utility model includes multiple snake-bone units 1. Each snake-bone unit 1 has a connecting portion 11, and a first preset distance exists between the connecting portion 11 and the centerline in the height direction of the snake-bone unit 1. Those skilled in the art should understand that this first preset distance is greater than 0. The height direction of the snake-bone unit 1 refers to the direction perpendicular to the length extension direction of the snake-bone mechanism. The centerline in the height direction of the snake-bone unit 1 is located at half the height of the snake-bone unit 1 (e.g.,...). Figure 4 (As shown by the long and short dashes in the text).

[0037] The connecting parts 11 of adjacent snake bone units 1 are hinged, so that adjacent snake bone units 1 can rotate relative to each other under the action of external force.

[0038] The connecting part 11 has a first predetermined distance from the center line in the height direction of the snake-bone unit 1, such that the connecting part 11 is substantially located on one side of the center line in the height direction of the snake-bone unit 1. That is to say, the connecting part 11 is offset relative to the center line in the height direction of the snake-bone unit 1. This offset setting of the connecting part 11 allows the snake-bone mechanism of this invention to overcome greater resistance when pulled by the traction rope towards the side without the connecting part 11, using the same force to pull the traction rope.

[0039] by Figure 2 Taking the snake-bone mechanism shown as an example, the connecting part 11 is located below the centerline in the height direction of the snake-bone unit 1. When the traction rope pulls the snake-bone mechanism upward, the snake-bone mechanism in this embodiment can overcome greater resistance compared to the prior art with the same pulling force, thereby lifting heavier or more resistant tissues.

[0040] The connecting part 11 on the snake bone unit 1 of the snake bone mechanism provided by this utility model is located on one side of the center line of the snake bone unit 1. When the same force is used to pull the traction rope as the existing snake bone mechanism, the snake bone mechanism of this utility model can overcome greater resistance and meet the needs of endoscopic medical devices for more usage scenarios.

[0041] In one embodiment of the snake-bone mechanism of this utility model, the connecting part 11 is provided with a hinge hole 111. The geometric center of the hinge hole 111 has a second preset distance between it and the center line in the height direction of the snake-bone unit 1. The number of hinge holes 111 on the connecting part 11 can be flexibly set according to actual needs. For example, the connecting part 11 is provided with one or two hinge holes 111.

[0042] Furthermore, the second preset distance between the geometric center of the hinge hole 111 and the center line in the height direction of the snake bone unit 1 is 10%-40% of the height of the snake bone unit 1.

[0043] In one embodiment of the snake-bone mechanism of this utility model, the cross-section of the snake-bone unit 1 is circular, elliptical, square, or trapezoidal. The cross-section of the snake-bone unit 1 mentioned above refers to the cross-section that is aligned with the height direction of the snake-bone unit 1.

[0044] In one embodiment of the snake-bone mechanism of this utility model, a pull rope channel 12 is provided on the inner wall of the snake-bone unit 1. The pull rope can pass through the pull rope channel 12 to connect the snake-bone units 1 together. When the snake-bone mechanism needs to bend in two opposite directions (for example, to achieve upward and downward movements by bending in two opposite directions), two oppositely arranged pull rope channels 12 can be provided on the inner wall of the snake-bone unit 1.

[0045] In one embodiment of the snake-bone mechanism of this utility model, the snake-bone unit 1 is provided with a clearance portion 13 located on at least one side of the connecting portion 11 in the height direction. The clearance portion 13 may be, for example, a chamfered surface provided on the snake-bone unit 1. The provision of the clearance portion 13 can effectively avoid the problem of restricted rotation of the snake-bone unit 1 due to wall interference of the snake-bone unit 1 when adjacent snake-bone units 1 rotate relative to each other.

[0046] In one embodiment of the snake-bone mechanism of this utility model, the plurality of snake-bone units 1 include a head-end snake-bone unit 2. The head-end snake-bone unit 2 is provided with a connecting area 20 for connection to a traction rope. The head-end snake-bone unit 2 refers to the snake-bone unit 1 located at the very front of the snake-bone mechanism (e.g., adjacent to the end of the tongue depressor of the laryngoscope equipped with the snake-bone mechanism). The connecting area 20 on the head-end snake-bone unit 2 can be implemented in various ways, such as grooves, protrusions, fixing holes, or fixing rings, etc. The traction rope can be connected to the connecting area 20 by welding, bonding, or fastening.

[0047] When the traction rope is pulled, the head-end snake bone unit 2 is subjected to force and moves, which drives the other snake bone units 1 of the snake bone mechanism to move.

[0048] Furthermore, at least one annular protrusion (not shown in the figure) is provided on the outer wall surface of the head-end snake bone unit 2. The annular protrusion on the outer wall surface of the head-end snake bone unit 2 facilitates the fixing of the flexible protective sleeve attached to the outside of the snake bone mechanism.

[0049] Furthermore, the plurality of snake bone units 1 also include a tail-end snake bone unit 3. At least one annular protrusion is provided on the outer wall surface of the head-end snake bone unit 2 and the tail-end snake bone unit 3. The tail-end snake bone unit 3 refers to the snake bone unit 1 located at the very rear end of the snake bone mechanism (e.g., the end furthest from the tongue depressor of the laryngoscope on which the snake bone mechanism is mounted). The annular protrusions on the outer wall surface of the head-end snake bone unit 2 and the tail-end snake bone unit 3 facilitate the securing of a flexible protective sleeve attached to the outside of the snake bone mechanism.

[0050] In one embodiment of the snake-bone mechanism of this utility model, the connecting part 11 is further provided with a first limiting part for limiting the rotation angle of adjacent snake-bone units 1. The provision of the first limiting part helps to avoid the problem of excessive bending of the snake-bone mechanism due to excessive rotation angle of adjacent snake-bone units 1.

[0051] The first limiting part can be, for example, a protrusion or a chamfered surface provided on the connecting part 11. When the first limiting parts on adjacent snake-bone units 1 come into contact or engage, the rotation of the snake-bone unit 1 is restricted, thereby limiting the rotation angle of the adjacent snake-bone units 1. Alternatively, the first limiting parts on adjacent snake-bone units 1 can be structures that can engage. For example, the first limiting part on one of the adjacent snake-bone units 1 is a protrusion, and the first limiting part on the other of the adjacent snake-bone units 1 is a groove. The purpose of limiting the rotation angle of the adjacent snake-bone units 1 can be achieved by the engagement of the protrusion and the groove.

[0052] In one embodiment of the snake-bone mechanism of this utility model, the snake-bone unit 1 is further provided with a connector 14. The connector 14 is disposed on the wall of the snake-bone unit 1, and the connecting part 11 is located on the connector 14. The connector 14 can be disposed on the inner wall surface, outer wall surface, or end wall surface of the snake-bone unit 1. The connector 14 can have a block structure, a support structure, or other structures. By providing the connector 14, the connecting part 11 can be arranged more flexibly and stably.

[0053] Furthermore, the connector 14 is provided with a second limiting part 140 for limiting the rotation angle of adjacent snake bone units 1. The provision of the second limiting part 140 helps to avoid the problem of excessive bending of the snake bone mechanism due to excessive rotation angle of adjacent snake bone units 1.

[0054] The second limiting part 140 can be, for example, a protrusion or a chamfered surface provided on the connecting block 14. When the connecting part 11 or the second limiting part 140 on one of the adjacent snake-bone units 1 comes into contact with or engages with the second limiting part 140 on the other snake-bone unit 1, the rotation of the snake-bone unit 1 is restricted, thereby limiting the rotation angle of the adjacent snake-bone units 1. Alternatively, the second limiting part 140 on the adjacent snake-bone units 1 can be a structure that can engage. For example, the second limiting part 140 on one of the adjacent snake-bone units 1 is a protrusion, and the second limiting part 140 on the other of the adjacent snake-bone units 1 is a groove. The engagement of the protrusion and the groove can achieve the purpose of limiting the rotation angle of the adjacent snake-bone units 1.

[0055] This utility model also provides a laryngoscope.

[0056] The laryngoscope includes the snake-bone mechanism of this invention. This snake-bone mechanism can be installed within the curved section of the laryngoscope; when pulled by a traction rope, the snake-bone mechanism causes the curved section of the laryngoscope to bend.

[0057] Although specific embodiments of the present invention have been described in detail by way of examples, those skilled in the art should understand that the above examples are for illustrative purposes only and are not intended to limit the scope of the present invention. Those skilled in the art should understand that modifications can be made to the above embodiments without departing from the scope and spirit of the present invention. The scope of the present invention is defined by the appended claims.

Claims

1. A snake-bone mechanism, characterized in that, It includes multiple snake-bone units, each snake-bone unit having a connecting portion. The connecting portion has a first preset distance from the center line in the height direction of the snake-bone unit, and the connecting portions of adjacent snake-bone units are hinged together.

2. The snake-bone mechanism according to claim 1, characterized in that, The connecting part is provided with a hinge hole, and there is a second preset distance between the geometric center of the hinge hole and the center line of the height direction of the snake bone unit.

3. The snake-bone mechanism according to claim 2, characterized in that, The second preset distance between the geometric center of the hinge hole and the centerline of the snake bone unit in the height direction is 10%-40% of the height of the snake bone unit.

4. The snake-bone mechanism according to claim 1, characterized in that, The cross-section of the snake-bone unit is circular, elliptical, square, or trapezoidal.

5. The snake-bone mechanism according to claim 1, characterized in that, The inner wall of the snake-bone unit is provided with a traction rope channel.

6. The snake-bone mechanism according to claim 1, characterized in that, The snake-bone unit has a clearance portion located on at least one side of the connecting portion in the height direction.

7. The snake-bone mechanism according to claim 1, characterized in that, The plurality of snake bone units include a head-end snake bone unit, which has a connection area for connecting to a traction rope.

8. The snake-bone mechanism according to claim 7, characterized in that, The outer wall surface of the head-end snake bone unit is provided with at least one annular protrusion; or... The plurality of snake bone units also include a tail snake bone unit, and at least one annular protrusion is provided on the outer wall surface of the head snake bone unit and the tail snake bone unit.

9. The snake-bone mechanism according to claim 1, characterized in that, The connecting part is also provided with a first limiting part for limiting the rotation angle of adjacent snake bone units.

10. The snake-bone mechanism according to any one of claims 1 to 9, characterized in that, The snake-bone unit is also provided with a connector, which is disposed on the wall of the snake-bone unit, and the connecting part is located on the connector.

11. The snake-bone mechanism according to claim 10, characterized in that, The connector is provided with a second limiting part for limiting the rotation angle of adjacent snake bone units.

12. A laryngoscope, characterized in that, Includes the snake-bone mechanism as described in any one of claims 1 to 11.

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