CN209865003U - Multistage control structure and pH capsule operating handle - Google Patents

Abstract

The utility model relates to the technical field of medical equipment, a multistage control structure and pH capsule operating handle is disclosed. The multi-level control structure includes N action tabs, which are in turn stage I action tabs … … N action tabs from front to back, each action tab having an initial position and a terminal position. The control structure also comprises a limiting device, wherein the limiting device is provided with a plurality of fourth limiting parts which are used for independently limiting the initial positions of the II-level to N-level action pull buckles; the limiting device is also provided with a third limiting part, the front-stage action pull buckle interacts with the third limiting part in the backward movement process to untie the limitation of the fourth limiting part on the next-stage action pull buckle, and therefore the independent interlocking of the adjacent two-stage action pull buckles is untied. The pH capsule operating handle comprises a multi-stage control structure, and can sequentially act according to the sequence from stage I to stage N; the problem that adjacent two-stage action pull buckles cannot be interlocked independently and are easy to operate by mistake is solved.

Description

Multistage control structure and pH capsule operating handle

Technical Field

The utility model relates to the technical field of medical equipment, concretely relates to multistage control structure and pH capsule operating handle.

Background

In surgery or other situations, it is often desirable to actuate a sequence control mechanism, such as a PH capsule manipulator handle used in medical applications, which is coupled to a PH capsule transporter for securing the PH capsule in the esophagus of a human. The capsule is clamped on the mucous membrane tissue in the esophagus by pulling the primary motion control module, then the cord on the primary motion control module is separated from the capsule by pulling the primary motion control module, then the capsule is separated from the conveyor by pulling the secondary motion control module, and finally the conveyor is taken out of the esophagus by the handle. In the above operation, the main motion control module is required to move first, and then the first secondary motion control module and the second secondary motion control module are sequentially moved.

For example, chinese utility model patent publication No. CN104826220B (published japanese 2017.09.22) discloses a pH capsule operating handle with an interlocking device. The pH capsule operating handle has the following problems: 1) this operating handle can reach each motion control module's interlocking function, nevertheless can't reach independent interlocking function, specifically is: after the motion control module of the main level acts, the first secondary level and the second secondary level can move any one level at will, or after the motion control module of the main level acts, the first secondary level and the second secondary level can act simultaneously. According to the scheme, the primary motion control module and the first secondary motion control module as well as the first secondary motion control module and the second secondary motion control module do not have independent interlocking functions, so that misoperation is easily caused, and operation failure is caused. 2) After each stage of motion control module moves to the end position, the self-locking cannot be realized, and the forward motion is easy to realize, namely, the rebound phenomenon exists. 3) All motion control modules are one type and multiple in types, so that the waiting time of logistics switching in the processing process is increased, and the processing cost is increased. 4) The S-shaped guide strip is not easy to process and deform, and once deformed, the S-shaped guide strip cannot be used, so that the rejection rate is high; and the arrangement of the S-shaped guide strip increases the assembly difficulty in the production of the medical instrument and increases the assembly process flow.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a multistage control structure to among the solution prior art, multistage motion control module, two adjacent motion modules can not interlock alone, the problem of easy maloperation.

In order to achieve the above purpose, the utility model adopts the following technical scheme: the multi-stage control structure comprises N action pull buckles, wherein the N action pull buckles are an I-stage action pull buckle … … N-stage action pull buckle from front to back, and N is a positive integer larger than or equal to 2; each action pull buckle has an initial position and an end position and can move between the initial position and the end position; the control structure also comprises a limiting device, wherein the limiting device is provided with a plurality of fourth limiting parts which are used for independently limiting the initial positions of the II-level to N-level action pull buckles; the limiting device is also provided with a third limiting part, the front-stage action pull buckle interacts with the third limiting part in the backward movement process to untie the limitation of the fourth limiting part on the next-stage action pull buckle, and therefore the independent interlocking of the adjacent two-stage action pull buckles is untied.

Among the above-mentioned technical scheme, the fourth spacing portion among the stop device is spacing to II level to N level action initial position that draws the knot, simultaneously through setting up the spacing portion of third, when making the action draw the knot move backward, the spacing portion of third can draw the knot effect with the action to make the spacing portion of fourth move to the direction of keeping away from the action and drawing the knot, untie the spacing portion of fourth and drawing the knot to next stage action spacing, thereby untie the independent interlocking that adjacent two-stage action was drawn the knot. The multi-stage control structure can act in sequence from stage I to stage N; the problem that adjacent two-stage action pull buckles cannot be interlocked independently and are easy to operate by mistake is solved.

Furthermore, the limiting device is also provided with a plurality of first limiting parts for limiting the initial positions of the N action pull buckles again; when the action pull buckle is pulled, the action pull buckle can slide on the first limiting part.

The action of pulling and buckling can be prevented by arranging the first limiting part through misoperation, the first limiting part has the self-locking function, and the reliability of the multi-stage control structure is improved.

Furthermore, the limiting device is also provided with a plurality of second limiting parts for limiting the termination positions of the N action pull buckles.

The second limiting part is arranged, after the action pull buckle moves to the end position, the action pull buckle can be prevented from moving forwards, the action pull buckle is prevented from rebounding, and therefore the reliability of the multistage control structure is further improved.

Furthermore, stop device includes a plurality of shell fragment, and the shell fragment includes shell fragment body and canned paragraph, and first to fourth spacing portion establishes on the shell fragment body or locates between two adjacent shell fragments. The fixing section of the elastic sheet is fixedly connected with a device using the multistage control structure, and the elastic deformation of the elastic sheet is utilized to realize the functions of self-locking of the action pull buckle, rebound prevention and independent interlocking of the adjacent two-stage action pull buckle.

Furthermore, the elastic sheet is composed of a plurality of sub-elastic sheets, each sub-elastic sheet is provided with a fixed section, and the third limiting part and the fourth limiting part are arranged on the same sub-elastic sheet. The shrapnel can also be composed of one or more bullet sheets; the third limiting part and the fourth limiting part are arranged on the same bullet piece, so that the third limiting part and the fourth limiting part are linked.

Furthermore, every two action tabs are in one group and respectively comprise a first action tab positioned at the front end and a second action tab positioned at the rear end, so that the first action tabs and the second action tabs are alternately arranged; when N is an odd number, the last action pull buckle is independently a group;

at least one elastic sheet is arranged in the motion area of each group of action pull buckles and is a first elastic sheet; the motion area of the second action pull buckle of the front group and the first action pull buckle of the rear group is also provided with at least one elastic sheet which is a second elastic sheet; the first elastic sheet and the second elastic sheet are respectively provided with a third limiting part and a fourth limiting part;

the fourth limiting part on the first elastic sheet limits the second action pull buckle, and the fourth limiting part on the second elastic sheet limits the first action pull buckle;

when the first action pull buckle moves backwards, the third limiting part on the first elastic sheet can act with the first action pull buckle, so that the fourth limiting part moves towards the direction far away from the next-stage action pull buckle, and the limitation of the fourth limiting part on the next-stage action pull buckle by the first elastic sheet is released;

when the second action pull buckle moves backwards, the third limiting part on the second elastic sheet can act with the second action pull buckle, so that the fourth limiting part moves towards the direction far away from the next-stage action pull buckle, and the limitation of the fourth limiting part on the next-stage action pull buckle is released.

According to the scheme, the two adjacent action pull buckles are independently interlocked, the first action pull buckle and the second action pull buckle are alternately arranged, and the first elastic sheet and the second elastic sheet are also alternately arranged. The fourth limiting part on the first elastic sheet limits the second action pull buckle, and the fourth limiting part on the second elastic sheet limits the first action pull buckle, so that independent interlocking of the I-level action pull buckle, the II-level action pull buckle, the III-level action pull buckle … … N-1-level action pull buckle and the N-level action pull buckle is realized. Meanwhile, the third limiting parts are arranged on the first elastic sheet and the second elastic sheet, so that when the action pull buckle moves backwards, the third limiting parts on the first elastic sheet or the second elastic sheet can act with the action pull buckle, the fourth limiting part moves towards the direction far away from the action pull buckle of the next stage, the limitation of the fourth limiting part on the action pull buckle of the next stage is released, and the independent interlocking of the adjacent two-stage action pull buckle is released.

Furthermore, the first elastic sheet and the second elastic sheet are respectively provided with a first limiting part, the first limiting part is positioned at the front end of the third limiting part, the first action pull buckle is respectively provided with a first clamping part matched with the first limiting part on the first elastic sheet, and the second action pull buckle is also provided with a first clamping part matched with the first limiting part on the second elastic sheet.

The first limiting part on the first elastic sheet limits the initial position of the first action pull buckle through the first clamping part to realize self-locking; the first limiting part on the second elastic sheet also limits the initial position of the second action pull buckle through the first clamping part, and self-locking is achieved.

Furthermore, the first elastic sheet and the second elastic sheet are both provided with a second limiting part, and the second limiting part is positioned between the first limiting part and the third limiting part; when the action pull buckle moves to the end position, the second limiting part on the first elastic sheet can limit the end position of the first action pull buckle, and the second limiting part on the second elastic sheet can limit the end position of the second action pull buckle.

The first elastic piece and the second elastic piece are provided with second limiting parts, so that the first action pull buckle or the second action pull buckle is prevented from moving forwards and rebounding.

Further, the first to fourth limiting portions are all protrusions. One implementation of four limiting portions.

Further, the first limiting part, the second limiting part and the third limiting part are protrusions, and the fourth limiting part is a protruding piece. Another implementation of four limiting parts.

Furthermore, the first limiting part and the third limiting part are bulges, and the fourth limiting part is a protruding sheet; the second limiting part comprises a protruding piece hinged with the elastic piece body, and a pressure spring is fixedly connected between the rear surface of the protruding piece and the elastic piece body. In another implementation mode of the four limiting parts, the action pull buckle can smoothly and smoothly move to the rear end of the second limiting part by arranging the pressure spring to be limited.

Furthermore, the first clamping part on the first action pull buckle is a groove arranged on the first action pull buckle; the first clamping part on the second action pull buckle is an inclined plane arranged at the rear end of the second action pull buckle. The groove, the inclined plane and the first limiting part act to realize self-locking of the action pull buckle. When the first clamping part is a groove, the pull buckle can be prevented from moving backwards without external force, and the pull buckle can be prevented from moving forwards without external force.

Further, the second limiting part and the first limiting part are combined into a whole to be used as a same protrusion, the front end and the rear end of the protrusion limit the initial position and the final position of the action pull buckle respectively, and the first clamping parts are all inclined planes or edges arranged at the rear end of the action pull buckle.

In another implementation mode of the four limiting parts, the second limiting part and the first limiting part are combined into a whole to serve as the same protrusion, so that the structure of the elastic sheet is simpler, namely, the self-locking and rebound prevention functions of the action pull buckle can be realized by arranging one protrusion.

Furthermore, at least one elastic sheet is respectively arranged in the motion areas of two adjacent action pull buckles, and the elastic sheet is a fourth elastic sheet; the third limiting part and the fourth limiting part are positioned on the fourth elastic sheet; a fourth limiting part on the fourth elastic sheet limits the initial position of the II-level to N-level action pull buckle; when one of the action pull buckles moves backwards, the third limiting part on the fourth elastic sheet can act with the action pull buckle to enable the fourth limiting part to move towards the direction far away from the action pull buckle, and therefore the limitation of the fourth limiting part on the next-stage action pull buckle is released.

According to the scheme, another mode of independent interlocking of two adjacent action pull buckles is realized, the structure of the action pull buckle and the elastic sheet can be simplified, and batch production is facilitated.

Furthermore, at least one elastic sheet is also arranged in the motion area of the N action pull buttons, and the elastic sheet is a third elastic sheet; the first limiting part and the second limiting part are located on the third elastic sheet or between the head and the tail of the two adjacent bullet sheets, and the N action pull buckles are respectively provided with a second clamping part matched with the first limiting part and the second limiting part.

The action is realized through the effect of second block portion and first spacing portion and is drawn the auto-lock when detaining initial position, draws the bounce when detaining the final position through the effect of second block portion and second spacing portion to prevent the action.

Furthermore, the first limiting part, the second limiting part, the third limiting part and the fourth limiting part are all bulges which are arranged on the third elastic sheet and protrude towards the action pull buckle direction; the second clamping part is a clamping groove matched with the first limiting part and the second limiting part; the engaging groove is engaged with the first position-limiting portion at the initial position, and engaged with the second position-limiting portion at the final position. The self-locking of the action pull buckle and the function of preventing the action pull buckle from rebounding are realized through the matching of the protrusion and the clamping groove, and the structure is simple.

Further, the third elastic sheet consists of N or 2N sub-elastic sheets; the first limiting part and the second limiting part are arranged on the bullet piece and are protruding pieces protruding towards the action pull buckle direction; the second clamping part is a clamping groove matched with the first limiting part and the second limiting part; the engaging groove is engaged with the first position-limiting portion at the initial position, and engaged with the second position-limiting portion at the final position.

The different structural style of the third elastic sheet realizes the self-locking of the action pull buckle and prevents the rebound of the action pull buckle through the matching of the protruding sheet and the clamping groove.

Furthermore, the first limiting part and the second limiting part are both grooves which are arranged on the third elastic sheet and are sunken towards the direction far away from the action pull buckle; the second clamping part is a protrusion matched with the first limiting part and the second limiting part; when the device is at the initial position, the protrusion is clamped with the first limiting part, and when the device is at the final position, the protrusion is clamped with the second limiting part.

The groove on the third elastic sheet and the protrusion on the action pull buckle act to realize self-locking of the action pull buckle and prevent rebound when the action pull buckle is at the end position.

Further, the third elastic sheet consists of N +1 or 2N +1 sub-elastic sheets; the first limiting part and/or the second limiting part are grooves which are arranged on the sub spring pieces and are sunken towards the direction far away from the action pull buckle or gaps which are arranged between the head and the tail of two adjacent sub spring pieces; the second clamping part is a protrusion matched with the groove and/or the notch; when the device is at the initial position, the protrusion is clamped with the first limiting part, and when the device is at the final position, the protrusion is clamped with the second limiting part.

The above scheme is a structure of the third elastic sheet and the first limiting part and the second limiting part on the third elastic sheet, and the self-locking of the action pull buckle and the rebound prevention of the action pull buckle are realized through the action of the groove or the notch and the protrusion on the action pull buckle.

Furthermore, at least one elastic sheet is arranged in the motion area of the N action tabs, and the elastic sheet is a third elastic sheet; the first limiting part, the second limiting part, the third limiting part and the fourth limiting part are all bulges which are arranged on the third elastic sheet and protrude towards the action pull buckle direction; when the pull buckle is in the initial position, the action pull buckle is positioned between the first limiting part and the second limiting part and is limited by the two bulges; when the pull buckle is at the end position, the action pull buckle is positioned between the second limiting part and the first limiting part which are adjacent to each other, and is limited by the two rear bulges.

The action draw buckle is positioned between the first limiting part and the second limiting part for limiting, so that self-locking when the action draw buckle is at an initial position is realized, and rebound when the action draw buckle is at a final position is prevented. In the scheme, the action pull buckle is not provided with the clamping groove, so that the structure of the action pull buckle can be simplified.

Furthermore, at least one elastic sheet is arranged in the motion area of the N action tabs, and the elastic sheet is a third elastic sheet; the third elastic sheet consists of N sub elastic sheets; each bullet piece is provided with a first limiting part and a second limiting part, the first limiting part and the second limiting part are integrated and are the same protrusion protruding towards the action pull buckle direction, and the front end and the rear end of the protrusion limit the initial position and the final position of the action pull buckle respectively.

In another structure of the third elastic sheet, the first limiting part and the second limiting part are the same protrusion, so that the structure of the elastic sheet is simpler.

Furthermore, the fourth limiting part is a protrusion arranged on the second elastic sheet or the fourth elastic sheet, and the protrusion abuts against the rear end of the action pull buckle in the initial position; or the action pull buckle is provided with a groove matched with the protrusion, and the protrusion is clamped with the groove at the initial position.

During initial position, the fourth spacing portion is supported with the rear end that the action was drawn and is detained or fourth spacing portion and recess block, adopts above-mentioned two kinds of modes all can advance spacingly to II to N level action initial position that draws the knot.

Furthermore, the third limiting part is arranged on the second elastic sheet or the fourth elastic sheet and is a forward-inclined protruding sheet close to the action pull buckle, and a convex third clamping part is arranged on the action pull buckle; when the previous action draw buckle moves backwards, the third clamping part can act with the third limiting part to enable the fourth limiting part to move towards the direction far away from the action draw buckle, and therefore the limitation of the fourth limiting part on the next action draw buckle is released. The action pull buckle and the third limiting part act to release the other scheme that the fourth limiting part limits the action pull buckle at the next stage.

Another object of the utility model is to provide a pH capsule operating handle, including the shell, be equipped with multistage control structure in this shell, a length direction that N action was drawn and is buckled and can be followed the shell slides.

The multi-stage control structure can prevent the pull buckle from being pulled at the II stage or any other stage when the pull buckle is not pulled at the I stage; and the adjacent two-stage action pull buttons are independently interlocked, so that the action pull buttons are pulled according to the sequence of I-stage and II-stage … … N, thereby avoiding the rejection of capsules and the failure of the operation.

Furthermore, a sliding groove is formed in the shell, the tops of the N action pull buckles penetrate through the sliding groove and are located outside the shell, and the N action pull buckles are connected with the sliding groove in a sliding mode. The sliding groove is arranged to facilitate sliding of the pull buckle in all stages of actions.

Furthermore, the sliding groove is composed of N sub-sliding grooves, and a limiting block is arranged between every two adjacent sub-sliding grooves. The arrangement of the sub-sliding grooves and the limiting blocks can further limit the initial position and the final position of the action pull buckle, and the reliability of the pH capsule operating handle is improved.

The utility model discloses a multistage control structure's beneficial effect: 1) arranging a third limiting part and a fourth limiting part to enable the multi-stage control structure to act in sequence from the I stage to the N stage; the problem that adjacent two-stage action pull buckles cannot be interlocked independently and are easy to operate by mistake is solved. 2) The first limiting part is arranged to prevent misoperation from causing the action of pulling and buckling, the first limiting part plays a self-locking role, and the reliability of the multi-stage control structure is improved. 3) The second limiting part is arranged, after the action pull buckle moves to the end position, the action pull buckle can be prevented from moving forwards due to misoperation, and the action pull buckle is prevented from rebounding, so that the reliability of the multi-stage control structure is further improved. 4) The multi-stage control structure realizes the interlocking of two adjacent stages of action pull buckles and the self-locking and anti-rebound functions of the action pull buckles by arranging the action pull buckles and the elastic sheets; the action pull buckle and the elastic sheet in each scheme have simple structures, few types of action pull buckles and elastic sheets and low processing cost. 5) The elastic sheet has simple structure, easy processing and forming and almost zero rejection rate.

The utility model discloses a pH capsule operating handle's beneficial effect: because the handle is provided with the multi-stage control structure, the operating handle has the effect of the multi-stage control structure. And the assembly process of the action pull buckle, the elastic sheet and the shell is simpler than that of an S-shaped guide strip, and the assembly process flow of the operating handle is simplified.

Drawings

Fig. 1a is a schematic front sectional view of a multi-stage control structure according to a first embodiment.

FIG. 1b is a schematic bottom sectional view of a multi-stage control structure according to the first embodiment

FIG. 1c is a state diagram of the stage I action tab of FIG. 1b moving to an end position.

Fig. 1d is a schematic view of a first structure of the elastic piece according to the first embodiment.

Fig. 1e is a schematic view of a second structure of the elastic sheet according to the first embodiment.

Fig. 1f is a schematic view of a third structure of the elastic piece according to the first embodiment.

Fig. 1g is a schematic diagram of a fourth structure of the elastic piece according to the first embodiment.

Fig. 1h is a schematic front view of the first action tab of the first embodiment.

Fig. 1i is a schematic bottom view of the first action tab of the first embodiment.

Fig. 1j is a schematic front view of the second action tab of the first embodiment.

Fig. 1k is a schematic bottom view of the second action tab of the first embodiment.

Fig. 2a is a schematic bottom sectional view of a multi-stage control structure according to a second embodiment.

Fig. 2b is a state diagram of the stage I action tab of fig. 2a moving to an end position.

Fig. 3 is a schematic bottom sectional view of a multi-stage control structure according to a third embodiment.

Fig. 4a is a schematic front sectional view of a multi-stage control structure according to a fourth embodiment.

Fig. 4b is a schematic bottom sectional view of the multi-stage control structure according to the fourth embodiment.

Fig. 5a is a schematic front sectional view of a multi-stage control structure according to a fifth embodiment.

Fig. 5b is a schematic bottom sectional view of a multi-stage control structure according to the fifth embodiment.

Fig. 5c is a state diagram of the stage I action tab of fig. 5a moving to an end position.

Fig. 6a is a schematic sectional bottom view of a multi-stage control structure according to a sixth embodiment.

Fig. 6b is a state diagram of the stage I action tab of fig. 6a moving to an end position.

Fig. 7 is a schematic sectional bottom view of a multi-stage control structure according to a seventh embodiment.

Fig. 8 is a schematic sectional bottom view of a multi-stage control structure according to an eighth embodiment.

Fig. 9 is a schematic bottom sectional view of the multi-stage control structure according to the ninth embodiment.

Fig. 10 is a schematic bottom cross-sectional view of a multi-stage control structure according to a tenth embodiment.

Fig. 11 is a front cross-sectional view of a multi-stage control structure according to an eleventh embodiment.

Fig. 12a is a schematic sectional front view of a multi-stage control structure according to a twelfth embodiment.

Fig. 12b is a state diagram of the stage I action tab of fig. 12a moving to an end position.

Fig. 13a is a front sectional structural view of the pH capsule operating handle.

Fig. 13b is a cross-sectional view a-a of fig. 13 a.

Fig. 13c is the state diagram of the pH capsule operating handle pulling the stage I action tab.

Fig. 13d is a cross-sectional view B-B of fig. 13 c.

Fig. 13e is the state diagram of the pH capsule operating handle pulling the level II action tab.

Fig. 13f is a cross-sectional view C-C of fig. 13 e.

Detailed Description

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

reference numerals in the drawings of the specification include: the device comprises a shell 100, a sub-chute 101, a limiting block 102, a handle head 200, an air suction hole 201, a sealing sleeve 202, a releaser mounting hole 203, a cord 204, a first elastic sheet 2, a fixed section 21, an elastic sheet body 23, a first limiting part 24, a second limiting part 25, a third limiting part 26, a fourth limiting part 27, a first action tab 3, a front surface 31 of the first action tab, a side surface 32 of the first action tab, a first clamping part 34, a second clamping part 35, a third clamping part 36, a fourth clamping part 37, a second action tab 4, a front surface 41 of the second action tab, a bottom surface 42 of the second action tab, a rear surface 44 of the second action tab, a second elastic sheet 5, a third elastic sheet 6 and a fourth elastic sheet 7.

Example one

This embodiment is substantially as shown in FIGS. 1 a-1 c: the multi-stage control structure includes N action tabs and a position limiting device, and this embodiment is described by taking five action tabs as an example, and the five action tabs are sequentially an I-stage action tab … … V-stage action tab from front to back (i.e., from right to left in fig. 1 a). Wherein the I-level, III-level and V-level action pull buckles have the same structure and are the first action pull buckle 3; the level II and level IV action pull buckles have the same structure and are the second action pull buckle 4.

The cross sections of the first action tab 3 and the second action tab 4 are both rectangular, and the cross sections of the action tabs are not limited to rectangular, but may be nearly elliptical, nearly circular, triangular, trapezoidal, pentagonal, hexagonal, or the like. As shown in fig. 1h to 1k, the first action tab 3 and the second action tab 4 are both provided with a first engaging portion 34, in this embodiment, the first engaging portion 34 of the first action tab 3 is a groove; the first engaging portion 34 of the second actuating tab 4 is a sloped surface disposed between the actuating tab bottom surface 42 and the rear surface 44, although the first engaging portion 34 of the second actuating tab 4 may be a recessed groove disposed on the actuating tab bottom surface 42.

The limiting device comprises a plurality of elastic sheets, and the two sides of the I-level action pull buckle and the II-level action pull buckle, the III-level action pull buckle and the IV-level action pull buckle and the V-level action pull buckle are respectively provided with an elastic sheet which is a first elastic sheet 2; elastic pieces, namely second elastic pieces 5, are arranged below the II-level action pull buckle, the III-level action pull buckle, the IV-level action pull buckle and the V-level action pull buckle; the structure of the second elastic sheet 5 in this embodiment is the same as that of the first elastic sheet 2.

Fig. 1d to 1g illustrate four spring plate structures, each spring plate includes a plate-shaped spring plate body 23 and a fixing section 21, and the spring plate body 23 is sequentially provided with a first limiting portion 24, a second limiting portion 25, a third limiting portion 26 and a fourth limiting portion 27 from front to back; in this embodiment, the four limiting portions are all protrusions provided on the elastic sheet body 23, and correspondingly, the four limiting portions are first to fourth protrusions. The front end of the first limiting portion 24 forms an obtuse angle with the elastic sheet body 23 or the front end of the first limiting portion 24 is an arc section smoothly transited with the elastic sheet body 23, so that the first clamping portion 34 and the first limiting portion 24 are smoothly separated.

In the first structure of the spring plate, as shown in fig. 1d, four protrusions are all protrusions and are integrally formed with the spring plate body 23, and the joint of the fixed section 21 and the spring plate body 23 is an inclined section; the front surface of the fourth protrusion is a plane perpendicular to the elastic sheet body 23, so that the interlocking effect of the adjacent two-stage action pull buckle is better; the rear surface of the second protrusion is also a plane perpendicular to the spring body 23, thereby making the anti-bounce effect better when the action buckle is at the end position. The difference between the second structure of the spring plate and the first structure is that, as shown in fig. 1e, the fourth protrusion is a protruding piece vertically arranged with the spring plate body 23, and the joint of the fixing section 21 and the spring plate body 23 is a straight line segment vertical to the spring plate body 23. The third structure of the spring plate is different from the first two structures in that, as shown in fig. 1f, four protrusions are separately and fixedly connected with the spring plate body 23. In a fourth structure of the spring plate, as shown in fig. 1g, the second protrusion includes a protruding piece hinged to the spring plate body 23, and a pressure spring is fixedly connected between a rear surface of the protruding piece and the spring plate body 23.

The first stopper 24 can be engaged with the first engaging portion 34 of the first operating buckle 3 or the second operating buckle 4 to stop the initial position of the operating buckle. When the action draw buckle moves backwards to the end position, the second limiting part 25 can limit the action draw buckle, and the action draw buckle is prevented from moving forwards and rebounding. The fourth limiting portion 27 can limit the initial position of the II-level to V-level action pull buckle, and independent interlocking of adjacent two-level action pull buckles is achieved. As can be seen from fig. 1c, when the action buckle moves backward, the third limiting portion 26 can abut against the action buckle, so that the fourth limiting portion 27 moves away from the action buckle, thereby releasing the limitation of the fourth limiting portion 27 on the action buckle of the next stage.

Fig. 1d to 1g show four preferable structures of the elastic sheet in this embodiment, and several modifications and improvements can be made. The first elastic sheets 2 on the two sides of the V-level action pull buckle are only self-locked, and in practice, the structure of the elastic sheet of the last-level action pull buckle can be improved in adaptability without arranging a second limiting part 25, a third limiting part 26 and a fourth limiting part 27 so as to reduce the space at the rear part of the shell 100.

Example two

The difference between the first embodiment and the second embodiment is that, as shown in fig. 2a and 2b, the second position-limiting portion 25 and the first position-limiting portion 24 are integrated into a single protrusion, and the first engaging portion 34 of the first action buckle 3 is an inclined surface provided between the side surface and the rear surface. With the structure, the front end of the first limiting part 24 limits the action pull buckles at all levels at the initial position, so that the action pull buckles at all levels can not move backwards under the condition of no external force, and self-locking is realized; in the end position, the rear end of the first stopper 24 stops the action fastener, and prevents the action fastener from moving forward and rebounding. The embodiment omits a projection, and the structure is simpler.

EXAMPLE III

The difference between this embodiment and the second embodiment is that, as shown in fig. 3, the spring plate in this embodiment is composed of a plurality of sub-spring plates, each sub-spring plate is provided with a fixing section 21, and the third limiting portion 26 and the fourth limiting portion 27 are provided on the same sub-spring plate.

Example four

The difference between the present embodiment and the second embodiment is that, as shown in fig. 4a and 4b, the first engaging portion 34 of the first action tab 3 in the present embodiment is an edge formed by the side surface 32 and the rear surface of the action tab; the first engaging portion 34 of the second actuating tab 4 is an edge formed by the bottom surface 42 and the rear surface 44 of the actuating tab. Thus, the first actuating tab 3 and the second actuating tab 4 can be designed to have the same structure, and the types of the actuating tabs can be simplified. Of course, the elastic sheet in this embodiment may also be composed of a plurality of sub-elastic sheets.

EXAMPLE five

The difference between this embodiment and the above four embodiments is that the structure of the elastic sheet in the position limiting device is different, as shown in fig. 5a to 5c, two sides of five action tabs are respectively provided with an elastic sheet, which is a third elastic sheet 6; the first limiting parts 24 and the second limiting parts 25 are positioned on the third elastic sheet 6 and are both bulges, and the first limiting parts 24 and the second limiting parts 25 are arranged in a staggered manner; the five action fasteners are all provided with second engaging portions 35 matching with the first position-limiting portions 24 and the second position-limiting portions 25, and the second engaging portions 35 are engaging grooves in the embodiment. In the initial position, the second engaging portion 35 engages with the first stopper portion 24, and in the final position, the second engaging portion 35 engages with the second stopper portion 35. A fourth elastic sheet 7 is respectively arranged below two adjacent action pull buttons; the third position-limiting part 26 and the fourth position-limiting part 27 are located on the fourth elastic sheet 7 and are both protruded. Of course, the elastic sheet in this embodiment may also be composed of a plurality of sub-elastic sheets.

EXAMPLE six

The difference between the present embodiment and the fifth embodiment is that the third elastic piece 6 and the action buckle have different structures, and as shown in fig. 6a and 6b, the first position-limiting portion 24 and the second position-limiting portion 25 are both protrusions, but the action buckle is not provided with the second engaging portion 35. When the device is in an initial position, each action pull buckle is positioned between the two bulges and limited by the two bulges; when the pull buckle is at the end position, the action pull buckle is positioned between the two adjacent rear bulges and is limited by the two rear bulges.

EXAMPLE seven

The difference between this embodiment and the sixth embodiment lies in that the structure of the third elastic piece 6 is different, as shown in fig. 7, in this embodiment, the third elastic piece 6 is composed of five sub elastic pieces; the first stopper portion 24 and the second stopper portion 25 are integrated into one projection.

Example eight

The difference between the fifth embodiment and the fifth embodiment is that the third elastic piece 6 and the action buckle are different in matching form, as shown in fig. 8, the third elastic piece 6 in the present embodiment is composed of ten sub-elastic pieces, the first limiting portion 24 and the second limiting portion 25 are backward inclined protruding pieces close to the action buckle, and each sub-elastic piece is provided with a protruding piece. Each action pull buckle is also provided with a second clamping part 35, and the second clamping part 35 is a clamping groove matched with the protruding sheet. Of course, the third spring plate 6 may be composed of five spring plates, and each spring plate is provided with two protruding pieces. In this embodiment, the second engaging portion 35 is engaged with the first stopper portion 24 at the initial position, and the second engaging portion 35 is engaged with the second stopper portion 35 at the final position, as in the fifth embodiment.

Example nine

The difference between the present embodiment and the fifth embodiment is that the third elastic piece 6 and the action buckle are different in matching form, as shown in fig. 9, in the present embodiment, the first position-limiting portion 24 and the second position-limiting portion 25 are grooves formed on the third elastic piece 6. Each action pull buckle is also provided with a second clamping part 35, and the second clamping part 35 is a protrusion matched with the groove on the third elastic sheet 6. In this embodiment, the second engaging portion is engaged with the first position-limiting portion at the initial position, and the second engaging portion is engaged with the second position-limiting portion at the final position. Of course, the third elastic sheet 6 in this embodiment may also be composed of a plurality of sub-elastic sheets.

Example ten

The difference between the present embodiment and the ninth embodiment is that the third resilient sheet 6 has a different structure, as shown in fig. 10, the third resilient sheet 6 is composed of six resilient sheets; the first limiting part 24 is still a groove formed on the third elastic sheet 6, and the second limiting part 25 is a gap between the head and the tail of two adjacent bullet sheets. As a variation of this structure, the third elastic sheet is still composed of six sub-elastic sheets, the first limiting portion 24 is a gap between the head and the tail of two adjacent sub-elastic sheets, and the second limiting portion 25 is a groove formed on the third elastic sheet 6. In another variant, the third elastic sheet is composed of eleven elastic sheets, and the first limiting portion 24 and the second limiting portion 25 are both notches between the heads and the tails of two adjacent elastic sheets.

EXAMPLE eleven

The difference between this embodiment and the fifth to tenth embodiments lies in that the fourth position-limiting portion 27 and the action buckle are different in matching form, as shown in fig. 11, the fourth position-limiting portion 27 is still a protrusion provided on the elastic piece body, the action buckle is provided with a fourth engaging portion 37, the fourth engaging portion 37 is a groove matched with the protrusion, and the positions of the third position-limiting portion 26 and the fourth engaging portion 37 are staggered in the width direction of the action buckle (i.e. perpendicular to the paper surface of fig. 11), so that the third position-limiting portion 26 cannot be engaged with the fourth engaging portion 37 in the backward movement process of the previous-stage action buckle. The front action tab abuts against the third limiting part 26 in the backward movement process, so that the fourth limiting part 27 can be separated from the fourth clamping part 37, and the independent interlocking of the adjacent two-stage action tabs is released. The fourth position-limiting portion 27 and the action fastener in this embodiment are suitable for all the embodiments described above.

Example twelve

The difference between this embodiment and the fifth to eleventh embodiments is that the third position-limiting portion 26 and the action buckle are different in the matching form, as shown in fig. 12a and 12b, in this embodiment, the fixing section 21 on the fourth elastic sheet 7 is located at the middle position of the elastic sheet body 23, the third position-limiting portion 26 is a forward-inclined protruding piece close to the action buckle, a protruding third engaging portion 36 is provided on the action buckle, and the positions of the third engaging portion 36 and the fourth position-limiting portion 27 are staggered in the width direction of the action buckle (i.e. in the direction perpendicular to the paper surface of fig. 12 a), so as to avoid interference. In the backward movement process of the previous stage action draw buckle, the third clamping part 36 and the third limiting part 26 act to enable the third limiting part 26 to rotate around the fixed section 21, so that the fourth limiting part 27 leaves the action draw buckle, and the independent interlocking of the adjacent two stages of action draw buckles is released. The form of the third position-limiting portion 26 and the action fastener is suitable for all the embodiments.

EXAMPLE thirteen

The difference between this embodiment and the foregoing embodiment is that the arrangement position of the elastic piece is different. In the first to fourth embodiments, the second elastic pieces 5 may be disposed on both sides of the action buckle, and the positions of the second elastic pieces are staggered from the first elastic pieces 2, and the number of the second elastic pieces may be two or more; similarly, the first elastic sheet 2 can also be arranged below the action pull buckle, and the position of the first elastic sheet is staggered with the second elastic sheet 5. Similarly, in the fifth to twelfth embodiments, the fourth resilient pieces 7 may be disposed on both sides of the action buckle, and the third resilient pieces 6 may be disposed below the action buckle.

In fact, the specific structures of the first limiting portion 24, the second limiting portion 25, the third limiting portion 26, the fourth limiting portion 27, the first engaging portion 34, the second engaging portion 35, the third engaging portion 36 and the fourth engaging portion 37 in the thirteen embodiments can be arbitrarily combined as required, so as to implement the function.

Example fourteen

When it is desired to use any one of the thirteen embodiments, the multi-stage control structure is assembled in a device requiring multi-stage control. This embodiment is preferably described by taking the example that the multi-stage control structure in the first embodiment is used in the operation handle of the pH capsule.

This embodiment is substantially as shown in fig. 13a and 13 b: a pH capsule handling handle includes a housing 100, a handle head 200, and a multi-stage control structure. The housing 100 is formed by butt-joining a left housing and a right housing, and a cavity is provided along a length direction of the housing 100, and a multi-stage control structure is provided in the cavity. The handle head 200 is clamped at the front end of the casing 100, the handle head 200 is also a cavity structure, and a sealing sleeve 202 made of silicon rubber is arranged between the handle head 200 and the casing 100. The sidewall of the handle head 200 is provided with a suction hole 201 communicating with the cavity of the handle head 200, and the front end of the handle head 200 is provided with a releaser mounting hole 203. Each action buckle is equipped with a cord 204, and for the convenience of observation, only the I-grade action buckle and the II-grade action buckle are shown in fig. 13 to which the cord 204 is connected, and in this embodiment, the cord 204 is preferably a medical steel wire. One end of the cord is connected to a corresponding action buckle, and the other end of the cord is led out from a releaser mounting hole 203 at the front end of the handle head 200.

The top of the shell 100 is provided with a sliding chute, the sliding chute consists of five sub sliding chutes 101, a limiting block 102 is arranged between two adjacent sub sliding chutes 101, and the tops of the five action pull buckles penetrate through the sub sliding chutes 101 and are positioned outside the shell 100; the side wall of the sub-sliding groove 101 is provided with a sliding way, the action pull buckle is provided with a sliding column matched with the sliding way, and the five action pull buckles are clamped on the sliding way of the sub-sliding groove 101 through the sliding column and can slide in the sub-sliding groove 101 in a front-back mode. The fixed section 21 on the first elastic sheet 2 and the second elastic sheet 5 is embedded into the shell 100 and fixedly connected with the shell 100, and one end of the first elastic sheet 2 and one end of the second elastic sheet 5 far away from the fixed section 21 are free ends.

In an initial state, as shown in fig. 13a and 13b, the five action tabs are located at the front end of the sub-sliding groove 101, and the first engaging portion 34 on the I-stage action tab is in a snap fit with the first limiting portion 24 on the first elastic piece 2, so that the I-stage action tab cannot act without external force, and self-locking is achieved. Meanwhile, the fourth limiting part 27 on the first elastic sheet 2 abuts against the rear surface 44 of the II-level action pull buckle, so that when the I-level action pull buckle does not act, the II-level action pull buckle cannot act, and independent interlocking of the I-level action pull buckle and the II-level action pull buckle is formed. The first engaging portion 34 of the II-level action buckle abuts against the first limiting portion 24 of the second elastic sheet 5, so that the II-level action buckle cannot act under the condition of no external force, and self-locking is realized. Meanwhile, the fourth limiting part 27 on the second elastic sheet 5 is abutted against the rear surface of the III-level action pull buckle, so that when the II-level action pull buckle does not act, the III-level action pull buckle cannot act, and independent interlocking of the II-level action pull buckle and the III-level action pull buckle is formed. By analogy, the connection relationship between the class III and IV action pull buckles and the first elastic sheet 2, and the connection relationship between the class IV and V action pull buckles and the second elastic sheet 5 are the same as above, and are not described again here.

The working principle is as follows:

the capsule is first mounted on a releaser (not shown), and then the releaser is connected with a releaser mounting hole 203, and a titanium alloy clip (not shown) is arranged on the rope 204 of the I-stage action pull buckle and is positioned in the capsule. The cord 204 on the level II action pull buckle and the level III action pull buckle is connected with the releaser.

The releaser is sent into the esophagus of human body by the operating handle, as can be seen from fig. 13c and 13d, the top of the I-level action pull buckle is pulled backwards to slide in the sub-sliding groove 101 until the top of the I-level action pull buckle abuts against the limited block 102. In the motion process of the I-level motion buckle, the first clamping part 34 on the I-level motion buckle is separated from the first limiting part 24 on the first elastic sheet 2, and the two side surfaces 32 of the I-level motion buckle support the third limiting parts 26 on the two first elastic sheets 2, so that the two first elastic sheets 2 deform and open towards two sides. After the two first elastic sheets 2 are opened, the fourth limiting part 27 on the first elastic sheet 2 is separated from the rear surface 44 of the II-level action pull buckle, so that the II-level action pull buckle is not limited by the first elastic sheet 2 any more, and the interlocking of the I-level action pull buckle and the II-level action pull buckle is released. At this time, all actions of the I-level action draw buckle are completed, and after the actions are completed, the front surface 31 of the I-level action draw buckle is limited by the second limiting part 25 on the first elastic sheet 2, so that the I-level action draw buckle cannot move forwards and rebound.

The I-level action pull buckle moves backwards and simultaneously drives the rope line connected with the I-level action pull buckle to move backwards, and the titanium alloy clamp connected with the rope line is clamped on the mucous membrane tissue in the esophagus by the backward movement of the rope line, so that the capsule is fixed on the esophagus of a human body.

After the I-level action pull buckle acts, the interlocking of the I-level action pull buckle and the II-level action pull buckle is only unlocked, and the interlocking of the II-level action pull buckle and the III-level action pull buckle, the III-level action pull buckle and the IV-level action pull buckle and the V-level action pull buckle are not unlocked, so that after the I-level action pull buckle acts, the II-level pull buckle can only be acted. The top of the II-stage action pull buckle is pulled backwards to slide in the sub-sliding groove 101 until the top abuts against the limiting block 102. In the process of the level II motion fastener movement, as can be seen from fig. 13e and 13f, under the external force, the first engaging portion 34 on the level II motion fastener is separated from the limitation of the first limiting portion 24 on the second elastic piece 5, and the bottom surface 42 of the level II motion fastener abuts against the third limiting portion 26 on the second elastic piece 5, so that the second elastic piece 5 deforms and moves downward. After abdicating, the fourth limiting part 27 on the second elastic sheet 5 is separated from the rear surface of the III-level action pull buckle, so that the III-level action pull buckle is not limited by the second elastic sheet 5 any more, and the interlocking of the II-level action pull buckle and the III-level action pull buckle is released. At this time, all the actions of the II-level action tab are completed, and after the actions are completed, the front surface 41 of the II-level action tab is limited by the second limiting part 25 of the second elastic sheet 5, so that the II-level action tab cannot move forwards and rebound.

The II-level action pull buckle moves backwards, meanwhile, the cord connected to the II-level action pull buckle is driven to move backwards, so that the cord of the I-level action pull buckle is separated from the titanium alloy clamp, at the moment, the III-level action pull buckle is pulled backwards, the cord on the III-level action pull buckle is pulled to separate the capsule from the releaser, and finally, the releaser is pulled out from the esophagus of a human body through the operating handle, so that the whole operation is completed. The operation process of the class III operation tab is the same as described above, and is not described herein again.

At present, IV-level and V-level action pull buckles are redundant bits and are designed for adapting to the structures of different capsules. For example, when the capsule is fixed on the esophagus of human body by pulling the pull buttons from level I to level III, the corresponding cord 204 on the pull button for level IV and level V is connected with the releaser.

Example fifteen

When the pH capsule operation handle uses the multistage control structure of the fifth, sixth, eighth to twelfth embodiments, since the first stopper portion 24 and the second stopper portion 25 can restrict both the front and rear directions of the action buckle at the initial position and the final position, the stopper 102 may not be provided on the housing 100.

The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, without departing from the concept of the present invention, several modifications and improvements can be made, which should also be regarded as the protection scope of the present invention, and these will not affect the effect of the present invention and the practicability of the patent. The technology, shape and construction parts which are not described in the present invention are all known technology.

Claims (28)

1. The multi-stage control structure comprises N action pull buckles, wherein the N action pull buckles are an I-stage action pull buckle … … N-stage action pull buckle from front to back, and N is a positive integer larger than or equal to 2; each action pull buckle has an initial position and an end position and can move between the initial position and the end position; the method is characterized in that: the control structure also comprises a limiting device, wherein the limiting device is provided with a plurality of fourth limiting parts which are used for independently limiting the initial positions of the II-level to N-level action pull buckles; the limiting device is also provided with a plurality of third limiting parts, the front-stage action pull buckle interacts with the third limiting parts in the backward movement process to untie the limitation of the fourth limiting part on the next-stage action pull buckle, and therefore the independent interlocking of the adjacent two-stage action pull buckles is untied.

2. The multi-level control structure of claim 1, wherein: the limiting device is also provided with a plurality of first limiting parts for limiting the initial positions of the N action pull buckles again, and when the action pull buckles are pulled, the action pull buckles can slide on the first limiting parts.

3. The multi-level control structure of claim 2, wherein: the limiting device is also provided with a plurality of second limiting parts for limiting the termination positions of the N action pull buckles.

4. The multi-level control structure of claim 3, wherein: the limiting device comprises a plurality of elastic sheets, each elastic sheet comprises an elastic sheet body and a fixing section, and the first limiting part, the second limiting part, the third limiting part and the fourth limiting part are arranged on the elastic sheet bodies or between two adjacent elastic sheets.

5. The multi-level control structure of claim 4, wherein: the elastic sheet is composed of a plurality of sub-elastic sheets, each sub-elastic sheet is provided with the fixing section, and the third limiting part and the fourth limiting part are arranged on the same sub-elastic sheet.

6. The multilevel control structure of claim 4 or 5, wherein: every two action pull buckles are in a group and respectively comprise a first action pull buckle positioned at the front end and a second action pull buckle positioned at the rear end, so that the first action pull buckle and the second action pull buckle are alternately arranged; when N is an odd number, the last action pull buckle is independently a group;

the motion area of each group of action pull buttons is provided with at least one elastic sheet which is a first elastic sheet; the motion area of the second action pull buckle of the front group and the first action pull buckle of the rear group is also provided with at least one elastic sheet which is a second elastic sheet; the first elastic sheet and the second elastic sheet are respectively provided with the third limiting part and the fourth limiting part;

the fourth limiting part on the first elastic sheet limits the second action pull buckle, and the fourth limiting part on the second elastic sheet limits the first action pull buckle;

when the first action pull buckle moves backwards, the third limiting part on the first elastic sheet can act with the first action pull buckle, so that the fourth limiting part moves towards the direction far away from the next-stage action pull buckle, and the limitation of the fourth limiting part on the next-stage action pull buckle by the first elastic sheet is released;

when the second action pull buckle moves backwards, the third limiting part on the second elastic sheet can act with the second action pull buckle, so that the fourth limiting part moves towards the direction far away from the next-stage action pull buckle, and the limitation of the fourth limiting part on the next-stage action pull buckle is released.

7. The multi-level control structure of claim 6, wherein: the first elastic sheet and the second elastic sheet are respectively provided with the first limiting part, the first limiting part is positioned at the front end of the third limiting part, the first action pull buckle is respectively provided with a first clamping part matched with the first limiting part on the first elastic sheet, and the second action pull buckle is also provided with a first clamping part matched with the first limiting part on the second elastic sheet.

8. The multi-level control structure of claim 7, wherein: the first elastic sheet and the second elastic sheet are both provided with the second limiting part, and the second limiting part is positioned between the first limiting part and the third limiting part; when the action pull buckle moves to the termination position, the second limiting part on the first elastic sheet limits the termination position of the first action pull buckle, and the second limiting part on the second elastic sheet limits the termination position of the second action pull buckle.

9. The multi-level control structure of claim 8, wherein: the first limiting part, the second limiting part and the fourth limiting part are all bulges.

10. The multi-level control structure of claim 8, wherein: the first limiting part, the second limiting part and the third limiting part are bulges, and the fourth limiting part is a protruding piece.

11. The multi-level control structure of claim 8, wherein: the first limiting part and the third limiting part are bulges, and the fourth limiting part is a protruding sheet; the second limiting part comprises a protruding piece hinged with the elastic piece body, and a pressure spring is fixedly connected between the rear surface of the protruding piece and the elastic piece body.

12. The multilevel control structure according to any one of claims 8 to 11, wherein: the first clamping part on the first action pull buckle is a groove arranged on the first action pull buckle; the first clamping part on the second action pull buckle is an inclined plane arranged at the rear end of the second action pull buckle.

13. The multi-level control structure of claim 8, wherein: the second limiting part and the first limiting part are integrated into a whole to form a same protrusion, the front end and the rear end of the protrusion limit the initial position and the final position of the action pull buckle respectively, and the first clamping parts are all inclined planes or edges arranged at the rear end of the action pull buckle.

14. The multilevel control structure of claim 4 or 5, wherein: at least one elastic sheet is arranged in the motion area of each two adjacent action pull buttons and is a fourth elastic sheet; the third limiting part and the fourth limiting part are positioned on the fourth elastic sheet; a fourth limiting part on the fourth elastic sheet limits the initial position of the II-level to N-level action pull buckle; when one of the action pull buckles moves backwards, the third limiting part on the fourth elastic sheet can act with the action pull buckle to enable the fourth limiting part to move towards the direction far away from the action pull buckle, and therefore the limitation of the fourth limiting part on the next-stage action pull buckle is released.

15. The multi-level control architecture of claim 14, wherein: at least one elastic sheet is also arranged in the motion area of the N action pull buttons, and the elastic sheet is a third elastic sheet; the first limiting portion and the second limiting portion are located on the third elastic sheet or between the head and the tail of the two adjacent bullet sheets, and the N action pull buckles are respectively provided with a second clamping portion matched with the first limiting portion and the second limiting portion.

16. The multi-level control architecture of claim 15, wherein: the first limiting part, the second limiting part, the third limiting part and the fourth limiting part are all bulges which are arranged on the third elastic sheet and protrude towards the action pull buckle direction; the second clamping part is a clamping groove matched with the first limiting part and the second limiting part; the engaging groove is engaged with the first position-limiting portion at the initial position, and engaged with the second position-limiting portion at the final position.

17. The multi-level control architecture of claim 15, wherein: the third elastic sheet consists of N or 2N sub elastic sheets; the first limiting part and the second limiting part are arranged on the bullet piece and are protruding pieces protruding towards the action pull buckle direction; the second clamping part is a clamping groove matched with the first limiting part and the second limiting part; the engaging groove is engaged with the first position-limiting portion at the initial position, and engaged with the second position-limiting portion at the final position.

18. The multi-level control architecture of claim 15, wherein: the first limiting part and the second limiting part are both grooves which are arranged on the third elastic sheet and are sunken towards the direction far away from the action pull buckle; the second clamping part is a protrusion matched with the first limiting part and the second limiting part; when the device is at the initial position, the protrusion is clamped with the first limiting part, and when the device is at the final position, the protrusion is clamped with the second limiting part.

19. The multi-level control architecture of claim 15, wherein: the third elastic sheet consists of N +1 or 2N +1 sub elastic sheets; the first limiting part and/or the second limiting part are grooves which are arranged on the sub spring pieces and are sunken towards the direction far away from the action pull buckle or gaps which are arranged between the head and the tail of two adjacent sub spring pieces; the second clamping part is a protrusion matched with the groove and/or the notch; when the device is at the initial position, the protrusion is clamped with the first limiting part, and when the device is at the final position, the protrusion is clamped with the second limiting part.

20. The multi-level control architecture of claim 14, wherein: at least one elastic sheet is also arranged in the motion area of the N action pull buttons, and the elastic sheet is a third elastic sheet; the first limiting part, the second limiting part, the third limiting part and the fourth limiting part are all bulges which are arranged on the third elastic sheet and protrude towards the action pull buckle direction; when the pull buckle is in the initial position, the action pull buckle is positioned between the first limiting part and the second limiting part and is limited by the two bulges; when the pull buckle is at the end position, the action pull buckle is positioned between the second limiting part and the first limiting part which are adjacent to each other, and is limited by the two rear bulges.

21. The multi-level control architecture of claim 14, wherein: at least one elastic sheet is also arranged in the motion area of the N action pull buttons, and the elastic sheet is a third elastic sheet; the third elastic sheet consists of N sub elastic sheets; each bullet piece is provided with the first limiting part and the second limiting part, the first limiting part and the second limiting part are integrated and are the same protrusion protruding towards the action pull buckle direction, and the front end and the rear end of the protrusion limit the initial position and the final position of the action pull buckle respectively.

22. The multi-level control structure of claim 6, wherein: the fourth limiting part is a protrusion arranged on the second elastic sheet or the fourth elastic sheet, and the protrusion abuts against the rear end of the action pull buckle in the initial position; or the action pull buckle is provided with a groove matched with the protrusion, and the protrusion is clamped with the groove at the initial position.

23. The multi-level control architecture of claim 14, wherein: the fourth limiting part is a protrusion arranged on the second elastic sheet or the fourth elastic sheet, and the protrusion abuts against the rear end of the action pull buckle in the initial position; or the action pull buckle is provided with a groove matched with the protrusion, and the protrusion is clamped with the groove at the initial position.

24. The multi-level control structure of claim 6, wherein: the third limiting part is arranged on the second elastic sheet or the fourth elastic sheet and is a forward-inclined protruding sheet close to the action pull buckle, and the action pull buckle is provided with a convex third clamping part; when the previous action draw buckle moves backwards, the third clamping part can act with the third limiting part to enable the fourth limiting part to move towards the direction far away from the action draw buckle, and therefore the limitation of the fourth limiting part on the next action draw buckle is released.

25. The multi-level control architecture of claim 14, wherein: the third limiting part is arranged on the second elastic sheet or the fourth elastic sheet and is a forward-inclined protruding sheet close to the action pull buckle, and the action pull buckle is provided with a convex third clamping part; when the previous action draw buckle moves backwards, the third clamping part can act with the third limiting part to enable the fourth limiting part to move towards the direction far away from the action draw buckle, and therefore the limitation of the fourth limiting part on the next action draw buckle is released.

26. A pH capsule operating handle, comprising a shell, characterized in that the shell is internally provided with a multi-stage control structure as claimed in any one of claims 1 to 23, and the N action pull buttons can slide along the length direction of the shell.

27. The pH capsule handling handle of claim 26, wherein: the shell is provided with a sliding groove, the tops of the N action pull buckles penetrate through the sliding groove and are located outside the shell, and the N action pull buckles are connected with the sliding groove in a sliding mode.

28. The pH capsule handling handle of claim 27, wherein: the sliding groove is composed of N sub-sliding grooves, and a limiting block is arranged between every two adjacent sub-sliding grooves.