CN217772601U

CN217772601U - Peripheral conveyor based on one-handed operation

Info

Publication number: CN217772601U
Application number: CN202221608972.5U
Authority: CN
Inventors: 朱明哲; 董永贺; 刘颖
Original assignee: Beijing Huamai Taike Medical Instrument Co ltd
Current assignee: Beijing Huamai Taike Medical Instrument Co ltd
Priority date: 2022-06-24
Filing date: 2022-06-24
Publication date: 2022-11-11
Anticipated expiration: 2032-06-24

Abstract

The utility model provides a peripheral conveyor based on one-hand operation, which relates to the technical field of medical instruments, and comprises an inner pipe, an outer pipe, a handle shell, a pulley, a pressing component and a transmission mechanism; the inner tube penetrates through and is fixedly arranged on the handle shell; the outer tube is sleeved outside the inner tube in a sliding mode and at least partially extends into the handle shell; the transmission mechanism is rotatably arranged in the handle shell and is in transmission connection with the outer tube; the pulley and the pressing assembly are respectively matched with the transmission mechanism, the pulley is used for roughly adjusting the position of the outer pipe relative to the inner pipe through the transmission mechanism, and the pressing assembly is used for finely adjusting the position of the outer pipe relative to the inner pipe through the transmission mechanism. The utility model provides a periphery conveyer requires lowly to length dimension, but one-hand operation does not have the idle stroke that the mode switch brought, makes things convenient for the operator to switch at will between slow release mode and quick release mode.

Description

Peripheral conveyor based on one-handed operation

Technical Field

The utility model belongs to the technical field of the medical instrument technique and specifically relates to a periphery conveyer based on one-hand operation is related to.

Background

Peripheral vascular diseases mainly refer to arteriosclerosis obliterans, aorta, angiitis obliterans and the like, belong to common diseases, and have the morbidity of 15-20%. The lower limb artery, especially the popliteal artery, is the site of a high incidence of peripheral vascular disease. The minimally invasive interventional therapy is widely applied to the treatment of peripheral vascular diseases because of the advantages of small wound, light pain of patients, quick effect after operation, high success rate and the like. Vascular stent implantation is the primary method of peripheral vascular intervention. The intravascular stent is implanted into a blood vessel through a conveying system, most of the intravascular stent in the prior art adopts two hollow tubes, a metal stent is compressed into an outer tube and is coated outside the inner tube, the metal stent enters the blood vessel through the puncture of a guide wire, any hollow tube is fixed, and the other hollow tube is pulled to release the stent in the body, and the stent can be expanded to form the inner wall of the blood vessel after self-expansion or balloon expansion.

The structure of the conveyor is limited due to the length limitation of the support, so that the operation of medical workers is inconvenient due to the overlong stroke of the required release support, both hands are generally needed to operate, the release is too fast due to the fact that the release process can not be accurately controlled by both hands in the switching operation process, and the support is not placed in an ideal position. In the prior art, a slowly-released push type conveyor structure combined with a quick release slider exists, but when quick release is carried out, operation is carried out by two hands, operation is inconvenient for medical workers, the release precision is not high, two release modes have a sequence, quick release can be carried out only after slow release is carried out, flexible switching cannot be carried out, and once the quick release is used by the medical workers in actual operation, a slow release neutral gear can be formed (refer to the invention patent with the application number of US20090640956, the slider is pulled to drive an outer tube to retreat when the quick release is carried out in the patent, so that quick release is realized.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a periphery conveyer based on one-hand operation, it is low to length size requirement, do not have the idle stroke that the mode switch brought, make things convenient for the operator to switch at will between slow release mode and quick release mode.

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

the utility model provides a periphery conveyor based on one-hand operation, which comprises an inner pipe, an outer pipe, a handle shell, a pulley, a pressing component and a transmission mechanism;

the inner pipe penetrates through and is fixedly arranged on the handle shell;

the outer tube is sleeved outside the inner tube in a sliding mode and at least partially extends into the handle shell;

the transmission mechanism is rotatably arranged in the handle shell and is in transmission connection with the outer tube;

the pulley and the pressing assembly are respectively matched with the transmission mechanism, the pulley is used for roughly adjusting the position of the outer pipe relative to the inner pipe through the transmission mechanism, and the pressing assembly is used for finely adjusting the position of the outer pipe relative to the inner pipe through the transmission mechanism.

Further, drive mechanism includes linkage gear and gear assembly, the linkage gear with the gear assembly all rotate install in the handle shell, the pulley rigid coupling in one side of linkage gear, the linkage gear with press the subassembly respectively through the gear assembly with outer tube transmission is connected.

Further, the gear assembly comprises a pawl, a first gear, a second gear and a third gear which are coaxially fixedly connected;

the first gear is meshed with the linkage gear, the second gear is matched with the pressing assembly, and the third gear is meshed with the outer tube;

the pawl is connected with the handle shell and matched with the second gear to limit the second gear to rotate in one direction.

Further, the transmission ratio of the linkage gear to the first gear is smaller than the transmission ratio of the pressing component to the second gear.

Furthermore, the pressing assembly comprises a pressing block and an elastic piece, the pressing block is matched with the second gear to drive the second gear to rotate in a single direction, the elastic piece is abutted between the pressing block and the inner wall of the handle shell, and the elastic piece is used for resetting the pressed pressing block.

Furthermore, the pressing block comprises a first matching portion and a second matching portion which are connected into a semi-surrounding structure, one side of the first matching portion facing the second matching portion is matched with the second gear, and one side of the second matching portion departing from the first matching portion is abutted to the elastic piece.

Further, the second cooperation portion is concavely provided with a limiting groove, a rotating shaft is arranged in the limiting groove in a penetrating mode, the second cooperation portion is connected with the handle shell in a rotating mode through the rotating shaft, and the elastic piece is suspended on the rotating shaft and abutted to the limiting groove.

Furthermore, a plurality of teeth arranged along a circular arc are arranged on the first matching part, and the vertical distance between each tooth and the rotating shaft is equal.

Further, the pitch circle of the second gear is inscribed in the pitch circle corresponding to each tooth on the first matching portion, and the extending direction of each tooth on the first matching portion faces to the opening formed between the first matching portion and the second matching portion.

Further, the outer tube comprises a tube body and a transmission part matched with the transmission mechanism, and the transmission part is fixedly arranged on the outer tube.

The utility model provides a periphery conveyer based on one-hand operation can produce following beneficial effect:

the above-described one-handed operation-based peripheral transporter has two usage modes, a slow release mode and a quick release mode, respectively. When using, but the handheld handle shell of singlehanded, press the subassembly through the forefinger repeatedly, press the subassembly and pass through drive mechanism and drive the outer tube and remove for inner tube intermittent type small amplitude, accomplish the slow release of support, can also stir the pulley through the thumb, the pulley passes through drive mechanism and drives the outer tube and remove for the inner tube by a wide margin, accomplishes the quick release of support. Of course, the above operation is not limited to using the index finger and thumb, and suitable fingers may be used depending on the location of the pressing assembly and pulley arrangement.

In the prior art, the outer tube is mostly pulled directly to release quickly, but the pulling distance of the mode is in equal proportion to the releasing path of the support, so that the distance for releasing the pulled outer tube is large when the length of the support is long, the support can be released only by using two hands, and the operation is not facilitated. Compared with the prior art, the peripheral conveyor provided by the utility model can realize the quick release of the support through the rotating pulley, the inconvenience caused by the lengthening of the release stroke of the outer pipe is not needed to be considered when the support with longer size is released, and the requirement on the length and the size of the conveyor is lower; secondly, the operating pulley and the pressing component do not affect the palm to hold the handle shell, so that the single-hand operation can be realized; and finally, the pulley and the pressing component can respectively drive the transmission mechanism to rotate without interference, so that the slow release mode and the fast release mode can be switched at will, and idle stroke caused by mode switching does not exist.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the technical solutions in the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is a schematic three-dimensional structure diagram of a peripheral conveyor based on one-handed operation at a first viewing angle according to an embodiment of the present invention;

FIG. 2 is an enlarged schematic view of FIG. 1 at A;

fig. 3 is a schematic three-dimensional structure diagram of a peripheral conveyor (without a casing, an inner pipe and a pipe body) based on one-handed operation according to an embodiment of the present invention;

fig. 4 is a schematic three-dimensional structure diagram of a transmission member, a pressing assembly and a gear assembly provided in an embodiment of the present invention;

fig. 5 is a schematic three-dimensional structure diagram of a peripheral conveyor based on one-handed operation at a second viewing angle according to an embodiment of the present invention;

fig. 6 is an enlarged schematic view of B of fig. 5.

Icon: 1-inner tube; 2-an outer tube; 21-a tube body; 22-a transmission member; 3-a handle housing; 4-a pulley; 5-a pressing component; 51-pressing block; 511-a first mating portion; 512-a second mating portion; 5121-a limit groove; 52-a resilient member; 6-a transmission mechanism; 61-linkage gear; 62-a gear assembly; 621-pawl; 622-a first gear; 623-a second gear; 624-third gear.

Detailed Description

The technical solutions of the present invention will be described more clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

The following describes in detail embodiments of the present invention with reference to the accompanying drawings. It should be understood that the description herein is provided for illustration and explanation of the invention and is not intended to limit the invention.

The present embodiment is directed to providing a peripheral transporter based on one-handed operation, as shown in fig. 1 and 2, including an inner tube 1, an outer tube 2, a handle housing 3, a pulley 4, a pressing assembly 5, and a transmission mechanism 6; the inner tube 1 penetrates through and is fixedly arranged on the handle shell 3; the outer tube 2 is sleeved outside the inner tube 1 in a sliding mode and at least partially extends into the handle shell 3; the transmission mechanism 6 is rotatably arranged in the handle shell 3 and is in transmission connection with the outer tube 2; the pulley 4 and the pressing component 5 are respectively matched with a transmission mechanism, the pulley 4 is used for roughly adjusting the position of the outer tube 2 relative to the inner tube 1 through the transmission mechanism 6, and the pressing component 5 is used for finely adjusting the position of the outer tube 2 relative to the inner tube 1 through the transmission mechanism 6.

It will be appreciated that the above "coarse" and "fine" are relative terms and do not refer to "coarse" or "fine" within a certain speed, and the inclusion of "coarse" and "fine" is intended to indicate that the adjustment speed of the pulley 4 is faster than the adjustment speed of the pressing member 5.

The releasing mode of the peripheral conveyor is to drive the outer pipe 2 to be pulled backwards, fix the inner pipe 1, enable the two pipes to slide relatively and expose the wrapped bracket to complete releasing. During specific operation, can press the subassembly 5 to realize the quick release and the slow release of support respectively through rolling pulley 4 and pressure, because rolling pulley 4 and pressing the subassembly 5 and all connecting on same drive mechanism 6, when switching between quick release and slow release, can not produce the idle stroke that is brought by the mode switch, do not influence the action of rolling pulley 4 and the action of pressing the subassembly 5 in addition when handing handle shell 3, can realize one-hand operation, to the support that has longer size, also need not consider the inconvenience that the release stroke lengthens and bring, the length and size designable littleer of conveyer.

The transmission mechanism 6 is provided to output the power input by the pulley 4 and the pressing component 5 to the outer tube 2 through different transmission paths so as to achieve quick retraction and slow retraction of the outer tube, and therefore, the transmission mechanism 6 mentioned in the above embodiment can be used for achieving the above purpose. For example: the transmission mechanism 6 may include a plurality of gears in transmission connection, and the pulley 4 and the pressing component 5 transmit power from different paths to the outer tube 2 by cooperating with different gears, or the transmission mechanism 6 may also include a plurality of hinged connecting rods, and the pulley 4 and the pressing component 5 realize different retracting speeds of the outer tube 2 by being hinged with different connecting rods.

Specifically, referring to fig. 3 as an example, in some embodiments, the transmission mechanism 6 includes a linkage gear 61 and a gear assembly 62, the linkage gear 61 and the gear assembly 62 are both rotatably installed in the handle housing 3, the pulley 4 is fixedly connected to one side of the linkage gear 61 to drive the linkage gear 61 to rotate synchronously therewith, and the linkage gear 61 and the pressing assembly 5 are respectively in transmission connection with the outer tube 2 through the gear assembly 62.

In the above embodiment, since the pulley 4 is matched with the gear assembly 62 through the linkage gear 61, the circumferential direction of the pulley 4 is not required to be provided with teeth matched with the gear assembly 62, and a smooth protrusion for increasing friction force can be provided, so that the use comfort is ensured. In addition, because the pulley 4 is fixedly connected to one side of the linkage gear 61, the size of the pulley 4 needs to be larger than that of the linkage gear 61 so as to enable the pulley 4 to protrude out of the handle shell 3, and the effective contact area between the pulley 4 with a larger size and fingers of an operator is larger, so that the sliding of the operator is facilitated.

Specifically, the pulley 4 and the linkage gear 61 may be fixedly connected by a connecting shaft, and an axis of the connecting shaft coincides with the axis of the pulley 4 and the linkage gear 61. The arrangement described above allows a clearance between the pulley 4 and the link gear 61, which allows the outer pipe 2 to pass through, thereby making the structure of the outer peripheral conveyor more compact.

To facilitate the operator using the thumb to toggle the pulley 4, in at least one embodiment, the pulley 4 is located on a side of the linkage gear 61 facing away from the palm. The operator is behind the grip handle shell 3, and the thumb can be the overlap joint naturally and keep away from one side of palm at grip handle shell 3, and above-mentioned setting can make when needing quick adjustment, and the thumb can move nearby to pulley 4 and operate, the operator's of being convenient for use.

In some embodiments, as shown in fig. 3, the gear assembly 62 may include, but is not limited to, a pawl 621 and a first gear 622, a second gear 623 and a third gear 624 coaxially affixed, the pawl 621 being connected to the handle housing 3.

Wherein the first gear 622 is meshed with the linkage gear 61; the second gear 623 is matched with the pressing component 5, and the pawl 621 is matched with the second gear 623 to limit the unidirectional rotation of the second gear 623; the third gear 624 meshes with the outer tube 2.

The first gear 622, the second gear 623, and the third gear 624 form a triple gear structure, and two power transmission paths are formed, wherein one power transmission path uses the pulley 4 as a power source and transmits power from the linkage gear 61 and the first gear 622 to the third gear 624, and the other power transmission path uses the pressing unit 5 as a power source and transmits power from the second gear 623 to the third gear 624. The two paths respectively realize the quick retraction and the slow retraction of the outer tube 2, and the device has simple structure and reliable transmission.

Specifically, during operation, the pulley 4 can be pulled forward, and the linkage gear 61 rotates forward along with the pulley, so as to drive the first gear 622, and the second gear 623 and the third gear 624 which are coaxially arranged with the first gear 622 to rotate backward, thereby realizing rapid retraction of the outer tube 2.

In the above process, the second gear 623 can be regarded as a ratchet wheel, and rotates unidirectionally relative to the pawl 621, and the pressing member 5 slides relative to the second gear 623 along the tooth edge of the second gear 623.

In operation, the pressing component 5 can also be pressed upwards, the pressing component 5 drives the second gear 623 and the first gear 622 and the third gear 624 which are coaxially arranged with the second gear 623 to rotate backwards, so as to realize slow retraction of the outer tube 2, when the pressing component 5 is pressed upwards and returns backwards, the pawl 621 prevents the second gear 623 from rotating forwards, the pressing component 5 slides relative to the second gear 623 along the toothed edge of the second gear 623 until the pressing component returns to the initial position, and the reciprocating pressing can enable the outer tube 2 to be retracted to the rearmost end to complete the release of the bracket.

In the above process, the pawl 621 may allow the second gear 623 to rotate backward in one direction, thereby preventing the outer tube 2 from retracting. The pawl 621 may include only a claw body fixedly connected to the handle housing 3, and at least one of the claw body and the second gear 623 has flexibility. The claw body has flexibility for specific explanation: when the second gear 623 rotates backwards, the claw body can be stirred to bend the claw body, so that the end part of the claw body slides along the tooth edge of the second gear 623; when the second gear 623 has a tendency to rotate forward, the second gear 623 gives a pressure to the pawl body in the length direction of the pawl body, and the pawl body prevents the second gear 623 from rotating. The pawl 621 may also include a pawl body and a spring, the pawl body is hinged to the handle housing 3, two ends of the spring are respectively connected to the handle housing 3 and the pawl body, the spring can apply a pulling force or a pressing force to the pawl body to press the pawl body onto the second gear 623, when the second gear 623 rotates backward, the second gear 623 needs to push the pawl body against the pulling force or the pressing force of the spring, and the pawl body abuts against the second gear 623 under the action of the elastic force of the spring to prevent the second gear 623 from rotating forward.

Specifically, the transmission ratio of the linkage gear 61 to the first gear 622 is smaller than the transmission ratio of the pressing assembly 5 to the second gear 623, so that the speed of retracting the outer tube 2 by the linkage gear 61 is faster than the speed of retracting the outer tube 2 by the pressing assembly 5.

The gear assembly 62 described above can adjust the retraction speed by changing the modules of the first gear 622 and the second gear 623. Specifically, the smaller the modulus of the first gear 622, the faster the speed of withdrawing the outer tube 2 by the pulley 4, and the larger the modulus of the second gear 623, the slower the speed of withdrawing the outer tube 2 by the pressing assembly 5.

First gear 622, second gear 623, and third gear 624 may be arranged in any order. In at least one embodiment, as shown in fig. 3, second gear 623 is sandwiched between first gear 622 and third gear 624.

On the basis of the above-described embodiment, in order to make the structure of the outer peripheral conveyor more compact, the pulley 4 is located on the side of the third gear 624 facing away from the second gear 623, that is, the pulley 4 is located on the left side of the interlocking gear 61 as shown in fig. 3.

It should be noted that all the structures capable of cooperating with the transmission mechanism to finely adjust the position of the outer tube 2 relative to the inner tube 1 can be the pressing assembly 5 mentioned in the above embodiments.

In some embodiments, as shown in fig. 3, the pressing assembly 5 may include, but is not limited to, a pressing block 51 and an elastic member 52, the pressing block 51 is engaged with the transmission mechanism 6, the elastic member 52 abuts between the pressing block 51 and the inner wall of the handle housing 3, the elastic member 52 is used for restoring the pressed pressing block 51, and the elastic member 52 may be a coil spring, a torsion spring, or the like, preferably a torsion spring.

When the transmission mechanism 6 includes the interlocking gear 61 and the gear assembly 62, the pressing block 51 is engaged with the second gear 623 in the gear assembly 62.

When the external tube 2 is used, an operator presses the pressing block 51 by overcoming the elastic force of the elastic piece 52, the pressing block 51 drives the second gear 623 to rotate backwards, the pressing block 51 is pressed to the bottom, the pressing block 51 is released, the pressing block 51 is reset by the elastic force of the elastic piece 52, and due to the limitation of the pawl 621, the second gear 623 does not rotate along with the pressing block 51, so that the slow release of the external tube 2 is realized. According to the analysis, the pressing block 51 is pressed to the outer tube 2 at the same position for a fixed distance at a single time, so that the operator can know the number of times of pressing when releasing and positioning the bracket in the earlier stage, and the operation is convenient. For example, need press the cubic during earlier stage location and can make the attached support in the vascular wall of support head end, release the equal length's of support so, the operation next time also only need press the cubic can. And the push type is relative to the pulley type, in the same installation space, the diameter of the tooth rotating on the pressing block 51 is larger than that of the gear set, so that the push type has the advantage of more labor saving.

In the initial state, that is, when the pressing block 51 is not pressed upward, the pressing block 51 may abut against the second gear 623, or may have a certain distance therebetween. If the pressing block 51 abuts against the second gear 623, in the quick release mode, since the second gear 623 rotates along with the first gear 622, the pressing block 51 is lifted up when the second gear 623 is shifted, when the elastic member 52 bears the maximum elastic pressure, the pressing block 51 slides along the tooth edge of the second gear 623 relative to the second gear 623 and is lifted up again, and the clicking sound is generated, so that an operator can judge the shifting speed of the pulley 4 through two senses, namely auditory sense and finger sense, and more attention can be focused. If there is a certain distance between the pressing block 51 and the second gear 623, the pressing block 51 will not be lifted when the second gear 623 rotates along with the first gear 622, and similarly, when the pressing block 51 is pressed upwards, the pressing block 51 will have an ineffective stroke before contacting the second gear 623, so that the gap should be controlled as small as possible during actual assembly.

It should be noted that the idle stroke is not caused by switching between the two modes, but is an own idle stroke of the slow release mode.

In some embodiments, as shown in fig. 4, the pressing block 51 includes a first fitting portion 511 and a second fitting portion 512 connected to each other in a half-enclosed structure, a side of the first fitting portion 511 facing the second fitting portion 512 is fitted with a second gear 623, a side of the second fitting portion 512 facing away from the first fitting portion 511 is abutted with the elastic member 52, and a triple gear may be located in the half-enclosed structure formed between the first fitting portion 511 and the second fitting portion 512, thereby making the structure of the outer circumferential conveyor more compact.

When the pressing block 51 is pressed upward and then returned, at least one of the teeth of the first engaging portion 511 and the second gear 623 has flexibility that does not prevent the first engaging portion 511 from rotating the second gear 623 rearward, so that the first engaging portion 511 can slide along the teeth of the second gear 623 smoothly along the teeth of the second gear 623 when the pressing block 51 is pressed upward and then returned.

When the pawl 621 is fixed to the handle housing 3, the teeth of the first fitting portion 511 and the pawl 621 may be made of a flexible material, the second gear 623 may be made of a rigid material, the teeth of the first fitting portion 511 and the pawl 621 may be made of a rigid material, and the second gear 623 may be made of a flexible material.

In at least one embodiment, the first and second

fitting portions

511 and 512 have an integral structure.

In addition, the pressing block 51 may be rotatably coupled to the handle housing 3, and the pressing block 51 may be maintained in an initial state by the elastic force of the elastic member 52 and the reception of the second gear 623.

In some embodiments, as shown in fig. 5 and fig. 6, in order to facilitate stable arrangement of the elastic element 52, a side of the second engaging portion 512 facing away from the first engaging portion 511 is concavely provided with a limiting groove 5121, the limiting groove 5121 is provided with a rotating shaft in a penetrating manner, the second engaging portion 512 is rotatably connected with the handle housing 3 through the rotating shaft, and the elastic element 52 is suspended on the rotating shaft and abuts against the limiting groove 5121.

The rotating shaft can realize the rotating connection between the second matching part 512 and the handle housing 3, and can also play a role of bearing the elastic element 52, so that the elastic element 52 can be stably suspended in the handle housing 3. The position of the limiting groove 5121 can limit the position of the elastic member 52, thereby preventing the elastic member 52 from being separated from the second fitting portion 512.

Specifically, the rotating shaft may be connected to a middle portion of the second matching portion 512, the second matching portion 512 on one side of the rotating shaft extends out of the handle housing 3 for pressing up by an operator, and the second matching portion 512 on the other side of the rotating shaft abuts against the elastic member 52.

In addition, the first matching portion 511 may have a plurality of teeth arranged along a circular arc, and the vertical distances between the teeth and the rotating shaft are equal, and the above description may be understood as follows: regarding the rotation axis as a circle center, each tooth on the first matching portion 511 is located on a circle having the rotation axis as a circle center and any one tooth as a radius.

In addition to the above embodiments, it is preferable that the pitch circle of the second gear 623 is inscribed in the pitch circle corresponding to each tooth of the first matching part 511, and the second gear 623 is located in the region surrounded by the first matching part 511 and the second matching part 512, so that the structure is more compact.

Specifically, the extending direction of each tooth on the first matching part 511 faces the opening formed between the first matching part 511 and the second matching part 512, so that the first matching part 511 drives the second gear 623 to rotate backwards and the first matching part 511 slides relative to the tooth edge of the second gear 623 when returning.

In some other embodiments, the pressing assembly 5 may also include a first rotating rod rotatably mounted on the handle housing 3, a second rotating rod having one end hinged to the first rotating rod and the other end provided with a pulling tooth engaged with the second gear 623, and a spring having two ends respectively connected to the handle housing 3 and the second rotating rod. When the gear box is used, the first rotating rod can be pressed, the first rotating rod drives the second rotating rod to overcome the elastic force of the spring to push the second gear 623 to rotate backwards, the spring is in a stretching state at the moment, and after the first rotating rod is released, the spring has a tendency of recovering a natural state, so that the second rotating rod and the first rotating rod are driven to reset.

Of course, the pressing unit 5 is not limited to the above two exemplary configurations, and the pressing unit 5 may also adopt other configurations capable of slowly rotating the second gear 623.

In some embodiments, the outer tube 2 comprises a tube body 21 and a transmission member 22 cooperating with the transmission mechanism 6, and the transmission member 22 can be fixed on the outer tube 2.

The transmission member 22 may be, but not limited to, a rack fixed to the exterior of the tube body 21 or a threaded tube fixed to the exterior of the tube body 21. In at least one embodiment, the transmission member 22 is a threaded pipe, and the transmission member 22 is sleeved outside the pipe body 21 and can be fixed to the outside of the pipe body 21 by using a glue, an interference fit, or the like.

In at least one embodiment, the tube 21 may be provided with a scale, and particularly, the scale may extend toward the proximal end (the end entering the human body) of the outer tube 2 with the position of the outer tube 2 extending out of the handle housing 3 in the non-retracted state as a starting point, so that the operator can quickly know the retracted size of the outer tube 2.

It should be added that "rearward" in the above context is a direction towards the distal end of the outer tube 2 and "forward" is a direction towards the proximal end of the outer tube 2.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention.

Claims

1. A peripheral conveyor based on one-hand operation is characterized by comprising an inner pipe (1), an outer pipe (2), a handle outer shell (3), a pulley (4), a pressing assembly (5) and a transmission mechanism (6);

the inner tube (1) penetrates through and is fixedly arranged on the handle shell (3);

the outer tube (2) is sleeved outside the inner tube (1) in a sliding mode and at least partially extends into the handle shell (3);

the transmission mechanism (6) is rotatably arranged in the handle shell (3) and is in transmission connection with the outer pipe (2);

the pulley (4) and the pressing assembly (5) are respectively matched with the transmission mechanism (6), the pulley (4) is used for roughly adjusting the position of the outer pipe (2) relative to the inner pipe (1) through the transmission mechanism (6), and the pressing assembly (5) is used for finely adjusting the position of the outer pipe (2) relative to the inner pipe (1) through the transmission mechanism (6).

2. The peripheral conveyor based on one-handed operation according to claim 1, characterized in that the transmission mechanism (6) comprises a linkage gear (61) and a gear assembly (62), the linkage gear (61) and the gear assembly (62) are both rotatably mounted in the handle housing (3), the pulley (4) is fixedly connected to one side of the linkage gear (61), and the linkage gear (61) and the pressing assembly (5) are respectively in transmission connection with the outer pipe (2) through the gear assembly (62).

3. The peripheral conveyor based on one-handed operation according to claim 2, characterized in that the gear assembly (62) comprises a pawl (621) and a first (622), a second (623) and a third (624) gear coaxially affixed;

the first gear (622) meshes with the linkage gear (61), the second gear (623) cooperates with the pressing assembly (5), and the third gear (624) meshes with the outer tube (2);

the pawl (621) is connected with the handle shell (3), and the pawl (621) is matched with the second gear (623) to limit the second gear (623) to rotate in one direction.

4. A peripheral conveyor based on one-handed operation according to claim 3, characterized in that the transmission ratio of the linkage gear (61) to the first gear (622) is smaller than the transmission ratio of the pressing assembly (5) to the second gear (623).

5. The peripheral conveyor based on one-hand operation according to claim 3, characterized in that the pressing assembly (5) comprises a pressing block (51) and an elastic member (52), the pressing block (51) is matched with the second gear (623) to drive the second gear (623) to rotate in one direction, the elastic member (52) abuts between the pressing block (51) and the inner wall of the handle housing (3), and the elastic member (52) is used for resetting the pressing block (51) after pressing.

6. The peripheral conveyor based on one-handed operation according to claim 5, wherein the pressing block (51) includes a first fitting portion (511) and a second fitting portion (512) connected to each other in a semi-enclosed structure, a side of the first fitting portion (511) facing the second fitting portion (512) is fitted with the second gear (623), and a side of the second fitting portion (512) facing away from the first fitting portion (511) is abutted with the elastic member (52).

7. The peripheral conveyor based on one-hand operation of claim 6, wherein the second matching portion (512) is concavely provided with a limiting groove (5121), a rotating shaft is arranged in the limiting groove (5121) in a penetrating mode, the second matching portion (512) is rotatably connected with the handle shell (3) through the rotating shaft, and the elastic piece (52) is hung on the rotating shaft and is abutted against the limiting groove (5121).

8. The peripheral conveyor based on one-handed operation according to claim 7, wherein the first fitting portion (511) has a plurality of teeth arranged along a circular arc shape, and the vertical distances between the respective teeth and the rotating shaft are equal.

9. The peripheral conveyor based on one-handed operation according to claim 8, characterized in that the pitch circle of the second gear (623) is inscribed in the pitch circle corresponding to each tooth on the first fitting portion (511), and the extending direction of each tooth on the first fitting portion (511) is directed toward the opening formed between the first fitting portion (511) and the second fitting portion (512).

10. Peripheral conveyor based on one-handed operation according to any of claims 1-9, characterized in that the outer tube (2) comprises a tube body (21) and a transmission element (22) cooperating with the transmission mechanism (6), the transmission element (22) being fixed to the outer tube (2).