CN217338850U - Otology microsurgery instrument disinfection box - Google Patents

Abstract

The utility model discloses a microsurgical instrument disinfection box of otology, including collet and upper cover, the collet comprises bottom plate and bounding wall, the equipartition has a plurality of fixed columns on the bottom plate of collet, the cover has a rubber piece on the well lower part lateral wall of fixed column, the well lower part of bounding wall outer wall is equipped with the lock ring, be equipped with the three-layer storage plate of depositing the microsurgical instrument of otology in the collet, the top surface of collet is equipped with the upper cover, the upper cover comprises metal sheet, fixed limit and cotter, a plurality of round holes have been seted up to the top surface of the metal sheet of upper cover. The utility model has the characteristics of can be with medical apparatus reasonable classification, save and put the space, improve in the transportation stability of surgical instruments in the disinfection box etc.

Description

Otology microsurgery instrument disinfection box

[ technical field ] A method for producing a semiconductor device

The utility model belongs to the field of medical equipment, concretely relates to otology micro-surgery apparatus disinfection box.

[ background of the invention ]

The operation is a treatment method for common otological diseases such as chronic otitis media, and expensive and high-precision instruments are commonly used due to the requirement of fine operation, and most of the instruments are millimeter-sized instruments.

Due to the lack of special otology microsurgery instrument disinfection box, all have great problem in operation, disinfection, transportation: 1. at present to the micro-apparatus that uses in the otology operation, do not have fixed subregion classification to accomodate, putting of apparatus is chaotic. In the operation, putting of apparatus does not have fixed apparatus box department of accomodating equally, and putting of apparatus on the operating table often is put by apparatus nurse individual custom, lacks the regularity, is unfavorable for the quick corresponding apparatus of finding of apparatus nurse, if the ear is micro-attracts pipe class apparatus overall structure little, does not have categorised fixed clamping structure to arrange in order it, has the shortcoming of easily obscuring, easily losing in use or clearance process. On an operating table, a dead zone is formed outside the operative field of an operator, and an instrument nurse is required to identify and provide corresponding instruments in time so as to finish the operation with high quality.

2. The area on the operating table or the operating trolley is small, the operating instruments used on the operating table and other tools such as a tray for storing the used operating instruments and a dirt containing tray need to be placed on the operating table, the existing disinfection box is placed on one side after the upper cover is opened, large space is occupied, and the space utilization is unreasonable.

3. Accomodate surgical instruments's box after the use needs can the secondary use through disinfecting, the ethylene oxide disinfecting equipment that adopts at present disinfects the box, because disinfecting equipment's disinfection space is limited, and the otology that the hospital used every day is micro-apparatus and disinfection box quantity more, when placing disinfection box and otology micro-apparatus in disinfecting equipment, the disinfection box and the otology that spread out occupy the disinfecting equipment space more, so often can not place many sets of disinfection box in the disinfecting equipment, so can waste the space in the disinfecting equipment, sterile work efficiency has also been reduced simultaneously.

4. When precision instruments need to be transported to a specified place for use, the existing storage box cannot ensure the stability of the surgical tools in the box, and the surgical tools are likely to be damaged due to jolt, so that the problem of how to improve the stability of the surgical tools in the storage device is also an urgent need to be solved.

Accordingly, the present application is directed to an otology microsurgical instrument sterilization case that solves the above-mentioned problems associated therewith.

[ Utility model ] content

The utility model aims to provide an otology micro-operation instrument disinfection box, which solves the problems that the prior otology micro-operation instrument disinfection box has no fixed partition classification and is disordered in placement; the disinfection box is placed on the operating table, namely, the related components occupy large space and the space utilization is unreasonable; the space in the disinfecting equipment is unreasonable in utilization, leads to disinfection work efficiency low and receiver relatively poor scheduling problem of stability in the transportation.

In order to solve the technical problem, the utility model discloses a following technical scheme:

a disinfection box for otology microsurgery instruments comprises a bottom support and an upper cover, wherein the bottom support consists of a bottom plate and a surrounding plate, a plurality of fixing columns are uniformly distributed on the bottom plate of the bottom support, a rubber block is sleeved on the side wall of the middle lower part of each fixing column, a rectangular through hole is respectively formed in the middle upper part of the left end surface and the middle upper part of the right end surface of the surrounding plate of the bottom support, a support ring is arranged at the middle lower part of the outer wall of the surrounding plate, a first containing plate and a second containing plate are arranged in the bottom support, a first containing plate body is a metal plate with the size smaller than the inner diameter of the surrounding plate, inner notches are respectively formed at the left end and the right end of the first containing plate, two fixing pins are respectively arranged at the bottoms of the left end and the right end of the first containing plate, bayonet holes which are penetrated through from left end to right end are respectively formed in the side walls of the fixing pins at the left end and the right end of the first containing plate, and round holes which are penetrated through the fixing columns are formed in the top surface of the first containing plate, the top surface of the first containing plate is further provided with a plurality of equal-diameter round holes, a supporting structure is arranged above any round hole in the plurality of equal-diameter round holes and comprises a supporting strip, the top of the supporting strip is provided with an elongated slot, the top surfaces of the left side and the right side of the elongated slot are provided with fixing strips extending to the center of the elongated slot, a clamping strip is arranged in the elongated slot of the supporting strip, the bottom of the supporting strip is provided with a hole, the bottom of the supporting strip is further provided with a plurality of thin iron wires, the tail end between every two of the thin iron wires is provided with a rubber plug, the top of the first containing plate is provided with a second containing plate, the top surface of the second containing plate is provided with a plurality of round holes, a plurality of fixing columns extend out of one round hole in the top surface of the second containing plate, a supporting block is arranged above any round hole of the plurality of round holes, and a third containing plate is arranged above the second containing plate, the top surface of collet is equipped with the upper cover, the upper cover comprises metal sheet, fixed limit and cotter, a plurality of round holes have been seted up to the top surface of the metal sheet of upper cover.

Furthermore, the top surface of the bottom plate is provided with a coaming.

Furthermore, a plurality of through holes are respectively formed in the front end face and the rear end face of the coaming.

Further, the rubber block is conical.

Furthermore, the left side and the right side of the support ring are connected with the left side and the right side of the coaming of the bottom support in a riveting mode.

Furthermore, a plurality of clamping grooves are formed in the top surface of the clamping strip.

Furthermore, the body of the second storage plate is also a metal plate, an inner notch is formed in the middle of the left end face and the right end face of the second storage plate, two fixing legs are arranged at the bottoms of the left end and the right end of the second storage plate respectively, and bayonets penetrating from left to right are formed in the side walls of the fixing legs at the bottom of the second storage plate.

Further, the elongated slot is seted up at the top of supporting shoe, the top surface of elongated slot left and right sides is equipped with the fixed strip that extends to the inslot, the round hole has been seted up to the bottom of supporting shoe, the bottom of supporting shoe still is equipped with a plurality of thin iron wires, a plurality of thin iron wires end between two liang be equipped with a rubber buffer, be equipped with the centre gripping strip in the elongated slot of supporting shoe, fixed bayonet socket has been seted up to centre gripping strip top surface.

Further, the left side and the right side of the metal plate of the upper cover are respectively provided with a fixed edge, two fixed edges are respectively bent at the front end and the middle rear end, two fixed edges are respectively provided with a bayonet on the end face of the bent part, two fixed edges are respectively provided with a rectangular through hole at the middle part, and two fixed edge middle parts are respectively collinear with rectangular through holes at the left end and the right end of the coaming of the collet.

Furthermore, a convex block is respectively arranged on the left end face of the left fixed edge and the right end face of the right fixed edge of the metal plate of the upper cover, a flat strip-shaped rectangular through hole is formed in the side face of the convex block, the flat strip-shaped rectangular through hole in the side face of the convex block is communicated with the rectangular through hole in the fixed edge, a flat pin is arranged in the rectangular through hole, a round convex block is arranged at the tail end of the part, below the metal plate, of the flat pin, and a drawing handle is arranged at the other end of the flat pin.

The utility model discloses the beneficial effect who reaches is:

(1) the three layers of the containing plates in the bottom support of the disinfection box can classify and place instruments, the positions of various instruments are clear at a glance, and the three layers of the containing plates of the disinfection box can be taken out integrally and can be classified and completely placed on an instrument table in an operation, the situation of disordered and crossed positions is avoided, and the problems of easy confusion and easy loss in the process of using and cleaning different otology microscopic instruments are solved; the instrument nurse can be accurate give the operation person with the surgical instrument, also can let the operation person keep a good mood when having improved operation person's work efficiency and carry out the operation sword, accomplishes high-quality operation.

(2) The three layers of storage plates and the upper cover of the disinfection box are all detachable, the support ring is arranged outside the bottom support, when the disinfection box is opened, the upper cover can be vertically inserted into the support ring through the bayonet on the side wall of the upper cover, the occupied space is small, and the space utilization is reasonable; this disinfection box is for dismantling, when putting into disinfecting equipment with the disinfection box in, can stand to inject holding plate or upper cover and circle on the supporting ring, reducible disinfection box space occupancy increases the space utilization in the disinfecting equipment, improves disinfection personnel's work efficiency.

(4) The fixing column is arranged on the bottom support of the disinfection box, the conical rubber block is arranged on the fixing column, and after the disinfection box is assembled and surgical tools are placed in the disinfection box, bumping of the three layers of containing plates in the transportation process can be relieved through the rubber block on the fixing column, so that surgical instruments are protected from being damaged; the stability is high; bearing structure and supporting shoe can be dismantled and install as required and take in any position on first storage plate and second storage plate and third storage plate, and fixed mode is nimble, supports rectangular bottom simultaneously and is equipped with rubber buffer and thin iron wire, and fixity can be good, supports rectangular and supporting shoe and can not follow surgical instruments to take out together when taking surgical instruments, and assembled bearing structure and supporting shoe are still convenient the washing simultaneously.

[ description of the drawings ]

The accompanying drawings are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention, and together with the description serve to explain the invention and not to limit the invention. In the drawings:

FIG. 1 is a perspective view of the present invention;

fig. 2 is a cross-sectional view of a front view of the present invention;

FIG. 3 is a partial schematic view at A in FIG. 2;

FIG. 4 is a partial schematic view at B of FIG. 2;

fig. 5 is a schematic perspective view of the upper cover of the present invention;

fig. 6 is a schematic perspective view of a third receiving plate and a support strip according to the present invention;

fig. 7 is a perspective view of a second receiving plate and a supporting block according to the present invention;

fig. 8 is a schematic perspective view of the first receiving plate and the support strip of the present invention;

fig. 9 is a perspective view of the shoe of the present invention.

1. A bottom support; 1-1, a bottom plate; 1-2, enclosing plates; 2. an upper cover; 2-1, a metal plate; 2-2, fixing edges; 2-3, bumps; 2-4, flat pin; 3. a second storage plate; 4. fixing a column; 5. a support block; 6. a support ring; 7. A rubber block; 8. a support structure; 8-1, supporting the long strip; 8-2, fine iron wires; 8-3, rubber plug; 8-4, clamping strips; 9. a first storage plate; 10. riveting; 11. and a third storage plate.

[ detailed description ] embodiments

The following is a detailed description of specific embodiments.

The present invention will be described in further detail with reference to the following embodiments. It should be emphasized that the following description is merely exemplary in nature and is not intended to limit the scope of the invention or its application.

As shown in figures 1-9, the otology microsurgery instrument disinfection box comprises a bottom support 1 and an upper cover 2, as shown in figure 8, the bottom support 1 consists of a bottom plate 1-1 and a coaming 1-2, the top surface of the bottom plate 1-1 is provided with a circle of coaming 1-2, and the front end surface and the rear end surface of the coaming 1-2 are respectively provided with a plurality of through holes with equal diameters. 4 fixing columns 4 are uniformly distributed on a bottom plate 1-1 of the bottom support 1, a hollow conical rubber block 7 is sleeved on the side wall of the middle lower part of each fixing column 4, a rectangular through hole is formed in the middle upper part of the left end face and the middle upper part of the right end face of a surrounding plate 1-2 of the bottom support 1 respectively, a supporting ring 6 is arranged on the middle lower part of the outer wall of the surrounding plate 1-2, and the left side and the right side of the supporting ring 6 are riveted and fixed with the left side and the right side of the surrounding plate 1-2 of the bottom support 1 through rivets 10.

A first containing plate 9 and a second containing plate 3 are arranged in a bottom support 1, as shown in figure 6, the body of the first containing plate 9 is a metal plate with the size smaller than the inner diameter of a surrounding plate, inner notches are respectively arranged in the middle parts of the left end and the right end of the first containing plate 9, two fixing legs are respectively arranged at the bottom parts of the left end and the right end of the first containing plate 9, bayonets penetrating from left to right are respectively arranged on the side walls of the fixing legs at the left end and the right end of the first containing plate 9, a round hole allowing a fixing column 4 to penetrate is arranged on the top surface of the first containing plate 9, a plurality of round holes with equal diameters are also arranged on the top surface of the first containing plate 9, a supporting structure 8 is arranged above any round hole in the plurality of round holes with equal diameters, the supporting structure 8 comprises a supporting strip 8-1, an elongated slot is arranged at the top part of the supporting strip 8-1, fixing strips extending to the center of the elongated slot are arranged on the top surfaces at the left side and the right side of the elongated slot, a hole is provided with a hole at the bottom part of the supporting strip 8-1, the bottom of the support strip 8-1 is also provided with a plurality of thin iron wires 8-2, the outside of the thin iron wires 8-2 is wrapped with medical plastic, the cross section of the medical plastic is of a flat rectangular structure, as shown in fig. 2 and 4, a rubber plug 8-3 is arranged at the tail end between every two of the thin iron wires 8-2, more precisely, two thin iron wires 8-2 penetrate through the side surface of the rubber plug 8-3 to form a structure with the rubber plug 8-3, two vertical grooves are arranged on the side wall of the rubber plug 8-3, when the thin iron wires 8-2 are straightened, a part of the thin iron wire 8-2 can be clamped into a vertical groove on the side wall of the rubber plug 8-3, a clamping strip 8-4 is arranged in a long groove of the supporting strip 8-1, and the top surface of the clamping strip 8-4 is provided with a plurality of clamping grooves.

The top of first storage plate 9 is equipped with second storage plate 3, the body of second storage plate 3 also is a metal sheet, its area is less than first storage plate 9, a plurality of round holes have been seted up to the top surface of second storage plate 3, 4 fixed columns 4 stretch out in one of them round hole of second storage plate 3 top surface, arbitrary round hole top of a plurality of round holes is equipped with supporting shoe 5, the middle part of terminal surface has been seted up about second storage plate 3 has interior notch, the bottom at both ends is equipped with two fixed feet respectively about second storage plate 3, all set up one on the lateral wall of the fixed foot of second storage plate 3 bottom and run through the bayonet socket that the right side was run through from a left side.

The elongated slot is seted up at the top of supporting shoe 5, the top surface of the elongated slot left and right sides is equipped with the fixed strip that extends to the inslot, the round hole has been seted up to the rectangular bottom of support, the bottom of supporting shoe still is equipped with a plurality of thin iron wires, the outside parcel of thin iron wire has medical plastics, medical plastics's cross sectional shape is flat rectangle structure, the end between two liang of a plurality of thin iron wires is equipped with a rubber buffer, more accurately, it is that two thin iron wires pass the side of rubber buffer and the rubber buffer forms a structure, two vertical grooves have been seted up on the lateral wall of rubber buffer, be equipped with the centre gripping strip in the elongated slot of supporting shoe 5, fixed bayonet socket has been seted up to centre gripping strip top surface. The structure of supporting shoe 5 is the same with bearing structure 8's structure, and the only difference then lies in that a fixed bayonet socket has been seted up on 5 short and the centre gripping strip of supporting shoe length, and a plurality of grooves have been seted up on 8 long and the centre gripping strip of bearing structure, under the supporting structure 8 of this application discloses abundant prerequisite, the structure of supporting shoe 5 has just not carried out repeated mark here.

The top surface of the bottom support 1 is provided with an upper cover 2, the upper cover 2 is composed of a metal plate 2-1, fixed edges 2-2 and flat pins 2-4, the top surface of the metal plate 2-1 of the upper cover 2 is provided with a plurality of round holes, the left side and the right side of the metal plate 2-1 of the upper cover 2 are respectively provided with one fixed edge 2-2, the front end, the middle end and the rear end of the two fixed edges 2-2 are respectively bent, the end surfaces of the bent parts of the two fixed edges 2-2 are respectively provided with a bayonet, and the middle parts of the two fixed edges 2-2 are provided with rectangular through holes. A left end face of a left fixed edge 2-2 on the left side of a metal plate 2-1 of an upper cover 2 and a right end face of a right fixed edge 2-2 are respectively provided with a convex block 2-3, the side face of the convex block is provided with a flat strip-shaped rectangular through hole, as shown in figure 3, the cross section of the rectangular through hole is in a transverse convex shape, the flat strip-shaped rectangular through hole on the side face of the convex block 2-3 is communicated with the rectangular through hole on the fixed edge 2-2, a flat pin 2-4 is arranged in the rectangular through hole, the tail end of the part, below the metal plate 2-1, of the flat pin 2-4 is provided with a round convex block, and the other end of the flat pin 2-4 is provided with a drawing handle.

Four corners of the joint of the bottom plate 1-1 and the coaming 1-2 of the bottom support 1 are respectively provided with openings for draining water, and four convex blocks are uniformly distributed at the bottom of the bottom plate 1-1 of the bottom support 1, so that the direct contact between the bottom surface of the bottom support 1 and the operation table top can be reduced.

When the sterilizing box is used, the upper cover 2 is inserted into the support ring 6 through the bayonet of the upper cover, so that the space on the operating table is saved, the first storage plate 9 and the second storage plate 3 can be taken out from the bottom support 1 and placed on the operating table in sequence, and meanwhile, the placing area can be reduced when the ethylene oxide sterilizing equipment is used for sterilizing, and more sterilizing boxes can be placed in the ethylene oxide sterilizing equipment for sterilizing. The first containing plate 9 is mainly used for containing needle hook medical instruments, and the second containing plate 3 is mainly used for containing forceps and scissors medical instruments. After the first accommodating plate 9 is clamped into the conical rubber block 7 on the fixing column 4, the fixing feet of the first accommodating plate are not normally contacted with the bottom plate 1-1 of the bottom support 1, the conical rubber block 7 is detachably arranged on the fixing column 4, if the fixing feet of the first accommodating plate 9 are contacted with the top surface of the bottom plate 1-1 of the bottom support 1, the rubber block 7 is seriously abraded, the service life is over, and the rubber block 7 can be replaced. The top surface of first storage plate 9 still offers the heavy groove that is used for placing the fixed foot of second storage plate 3 for improve stability. The thin iron wire 8-2 at the bottom of the supporting structure 8 can deform, when the supporting structure 8 is installed as required, the thin iron wire 8-2 is straightened firstly, a part of the straightened thin iron wire 8-2 can be clamped into a groove in the side face of the rubber plug 8-3 and then is aligned to a round hole in the first accommodating plate 9, the thin iron wire 8-2 and the rubber plug 8-3 penetrate through the round hole, then the rubber plug 8-3 is plugged into the round hole in the bottom of the supporting strip 8-1, as shown in fig. 4, the thin iron wire 8-2 is flattened, the supporting structure 8 can be fixed on the first accommodating plate 9, and the supporting block 5 is installed on the second accommodating plate 3.

The otology micro-instrument disinfection box is provided with three layers, but not limited to three layers, the structure of a third containing plate 11 of the otology micro-instrument disinfection box is the same as that of a first containing plate 9, and the only difference is that a supporting structure 8 of the third containing plate 11 is transverse and used for placing instruments which are small in overall structure and provided with bends, such as an ear micro-suction tube.

The first board of accomodating of this disinfection box, the second is accomodate the top surface of board and third and is accomodate the sign such as the micro-apparatus name of differentiation otology, size type and figure respectively, and the instrument nurse of the shift of being convenient for gets and puts the micro-apparatus of otology.

The above description should not be taken as limiting the invention to the specific embodiments, but rather, as will be apparent to those skilled in the art, numerous modifications and variations are possible without departing from the inventive concepts herein disclosed, and it is intended to cover all modifications and variations of the invention as defined by the appended claims.

Claims (10)

1. The utility model provides an otology microsurgery apparatus disinfection box which characterized in that: the bottom support comprises a bottom support and an upper cover, wherein the bottom support consists of a bottom plate and a surrounding plate, a plurality of fixing columns are uniformly distributed on the bottom plate of the bottom support, a rubber block is sleeved on the side wall of the middle lower part of each fixing column, a rectangular through hole is respectively formed in the middle upper part of the left end surface and the middle upper part of the right end surface of the surrounding plate of the bottom support, a support ring is arranged at the middle lower part of the outer wall of the surrounding plate, a first accommodating plate and a second accommodating plate are arranged in the bottom support, a first accommodating plate body is a metal plate with the size smaller than the inner diameter of the surrounding plate, inner notches are respectively formed at the left end and the right end of the first accommodating plate, two fixing legs are respectively arranged at the bottoms of the left end and the right end of the first accommodating plate, a bayonet which penetrates from left to right is respectively formed on the side wall of the fixing legs at the left end and the right end of the first accommodating plate, a round hole through which allows the fixing columns to penetrate is formed in the top surface of the first accommodating plate, a plurality of round holes with equal diameters are further formed on the top surface of the first accommodating plate, a supporting structure is arranged above any one of the round holes with the same diameter, the supporting structure comprises a supporting strip, the top of the supporting strip is provided with an elongated slot, the top surfaces of the left side and the right side of the elongated slot are provided with fixing strips extending to the center of the elongated slot, the elongated slot of the supporting strip is internally provided with a clamping strip, the bottom of the supporting strip is provided with a hole, the bottom of the supporting strip is also provided with a plurality of thin iron wires, the tail end of each two thin iron wires is provided with a rubber plug, the top of the first accommodating plate is provided with a second accommodating plate, the top of the second accommodating plate is provided with a plurality of round holes, a plurality of fixing columns extend out of one round hole on the top surface of the second accommodating plate, a supporting block is arranged above any one round hole of the round holes, a third accommodating plate is arranged above the second accommodating plate, and the top surface of the bottom support is provided with an upper cover, the upper cover is composed of a metal plate, a fixing edge and a flat pin, and a plurality of round holes are formed in the top surface of the metal plate of the upper cover.

2. An otologic microsurgical instrument sterilization case as claimed in claim 1, wherein: and the top surface of the bottom plate is provided with a coaming.

3. An otologic microsurgical instrument sterilization case as claimed in claim 1, wherein: and the front end surface and the rear end surface of the coaming are respectively provided with a plurality of through holes.

4. An otologic microsurgical instrument sterilization case as claimed in claim 1, wherein: the rubber block is conical.

5. An otologic microsurgical instrument sterilization case as claimed in claim 1, wherein: the left side and the right side of the support ring are connected with the left side and the right side of the coaming of the bottom support in a riveting mode.

6. An otologic microsurgical instrument sterilization case as claimed in claim 1, wherein: and a plurality of clamping grooves are formed in the top surface of the clamping strip.

7. An otology microsurgical instrument sterilization case of claim 1, wherein: the body of the second storage plate is also a metal plate, an inner notch is formed in the middle of the left end face and the right end face of the second storage plate, two fixing legs are arranged at the bottoms of the left end and the right end of the second storage plate respectively, and a bayonet penetrating from the left side to the right side is formed in the side wall of each fixing leg at the bottom of the second storage plate.

8. An otology microsurgical instrument sterilization case of claim 1, wherein: the top of supporting shoe is seted up the elongated slot, the top surface of elongated slot left and right sides is equipped with the fixed strip that extends to the inslot, the round hole has been seted up to the bottom of supporting shoe, the bottom of supporting shoe still is equipped with a plurality of thin iron wires, a plurality of end between two liang of thin iron wires be equipped with a rubber buffer, be equipped with the grip strip in the elongated slot of supporting shoe, fixed bayonet socket has been seted up to grip strip top surface.

9. An otologic microsurgical instrument sterilization case as claimed in claim 1, wherein: the left side and the right side of the metal plate of the upper cover are respectively provided with a fixed edge, two fixed edges are respectively bent at the front end and the middle rear end, two fixed edges are respectively provided with a bayonet on the end face of the bent part, two fixed edges are provided with a rectangular through hole at the middle part, and two fixed edge middle parts are respectively collinear with rectangular through holes at the left end and the right end of the coaming of the collet.

10. An otologic microsurgical instrument sterilization case as defined in claim 9, wherein: the metal plate comprises an upper cover and is characterized in that a convex block is respectively arranged on the left end face of a left fixed edge and the right end face of a right fixed edge of a metal plate of the upper cover, a flat strip-shaped rectangular through hole is formed in the side face of the convex block, the flat strip-shaped rectangular through hole in the side face of the convex block is communicated with the rectangular through hole in the fixed edge, a flat pin is arranged in the rectangular through hole, a round convex block is arranged at the tail end of the part, located below the metal plate, of the flat pin, and a drawing handle is arranged at the other end of the flat pin.

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