CN212729934U - Rod piece sealing structure and puncture outfit - Google Patents

Abstract

The utility model discloses a member seal structure and puncture ware belongs to medical instrument technical field. This member seal structure includes elastic sealing cover and elastic bracket, elastic sealing cover is gone up to run through to be equipped with the passageway of wearing to establish that supplies the member to pass, elastic bracket's cover is established the structure cover and is established on elastic sealing cover, the link and the cover that support the pressure arm establish structural connection, support the end elasticity of pressing and support and press on elastic sealing cover, so that the inner wall of elastic sealing cover's sealed end and the sealed butt of the outer wall of member, a plurality of support of pressing the arm press the end to be the annular and arrange in order to form and support the clamping ring, the internal diameter that supports the clamping ring can carry out the adaptability increase and decrease according to the diameter of member, so that the member. This rod piece seal structure utilizes elastic bracket can support the sealed end of elastic sealing cover and press on the member through setting up elastic bracket to still can ensure good leakproofness when the diameter of member changes on a large scale, needn't customize elastic sealing cover again, be favorable to reduce cost.

Description

Rod piece sealing structure and puncture outfit

Technical Field

The utility model relates to the technical field of medical equipment, especially, relate to a member seal structure and puncture ware.

Background

In the medical field, there are many gas or liquid bearing devices which need to be considered to be closed, and the sealing of a rod member moving in the bearing device with the outside is the key point of the whole device, and the sealing is generally realized by a sealing structure sleeved on the rod member. The existing sealing structure mostly adopts a plastic sealing sleeve with better elasticity, and the plastic sealing sleeve is used as a peripheral sealing medium to realize dynamic matching with the rod piece, so that the sealing effect is achieved.

Because the specifications of the rod pieces are different, when the diameter of the rod piece is changed, the rod piece is limited by the optimal elastic adaptation range of the plastic material, and the existing plastic sealing sleeve can only realize better sealing effect within a smaller diameter change range of the rod piece. When the diameter of the rod is changed greatly, the sealing effect between the rod and the plastic sealing sleeve cannot be ensured. In order to ensure the sealing effect, a plastic sealing sleeve of one specification needs to be matched for each rod piece of each diameter, so that the cost is increased, and the sealing effect is poor due to the fact that matching errors are prone to occurring in the actual matching process.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a member seal structure can be adapted to the sealed of the member of different diameters, and sealed effectual.

To achieve the purpose, the utility model adopts the following technical proposal:

a rod sealing structure comprising:

the elastic sealing sleeve is provided with a penetrating channel for a rod piece to penetrate through, and one end of the elastic sealing sleeve is a sealing end;

the elastic bracket comprises a sleeving structure and a plurality of abutting arms, the sleeving structure is sleeved on the elastic sealing sleeve, one end of each abutting arm is a connecting end, the other end of each abutting arm is an abutting end, the connecting end is connected with the sleeving structure, and the abutting ends elastically abut against the elastic sealing sleeve so that the inner wall of each sealing end is in sealing abutting contact with the outer wall of the rod piece;

the pressing ends of the pressing arms are annularly arranged to form pressing rings, and the inner diameters of the pressing rings are configured to be increased or decreased according to the diameters of the rod pieces, so that the elastic sealing sleeves seal the rod pieces with different diameters.

Preferably, the plurality of pressing arms include a first pressing arm group and a second pressing arm group, the pressing arm in the first pressing arm group is a first pressing arm, the pressing arm in the second pressing arm group is a second pressing arm, and the first pressing arm and the second pressing arm are both arranged in an inclined manner relative to the axis direction of the rod piece and in opposite inclined directions.

Preferably, at least one second abutting arm is arranged between two adjacent first abutting arms, at least one first abutting arm is arranged between two adjacent second abutting arms, and the adjacent first abutting arms and the adjacent second abutting arms are arranged in a crossed manner.

Preferably, the elastic sealing sleeve comprises a plurality of sealing sub-sleeves which are nested, each sealing sub-sleeve comprises a taper sleeve portion and a first flanging which is arranged along the circumferential direction of the large-diameter end of the taper sleeve portion in an outwards protruding mode, the taper sleeve portion penetrates through an opening along the direction of a bus, the opening extends and penetrates through the first flanging, and the opening of every two adjacent sealing sub-sleeves is arranged in a staggered mode.

Preferably, a first ring sleeve part is arranged between the taper sleeve part and the first flanging;

the sleeve structure comprises a second ring sleeve portion and a second flanging arranged outwards and convexly in the circumferential direction of the second ring sleeve portion, the second ring sleeve portion is arranged on the first ring sleeve portion in a sleeved mode, and the second flanging is arranged in a stacked mode with the first flanging.

Preferably, the pressing arm includes a first connecting rod, a second connecting rod and a pressing rod, which are connected in sequence, the first connecting rod is connected to the sleeve structure, the second connecting rod is attached to the conical surface of the conical sleeve portion, and the pressing rod presses against the elastic sealing sleeve.

Preferably, the second connecting rod is a straight rod or a corrugated rod.

Preferably, the pressure lever is an arc lever, the middle part of the arc lever is pressed on the elastic sealing sleeve, and the free end of the arc lever is obliquely arranged in the direction far away from the elastic sealing sleeve.

Preferably, the pressing arm is made of any one of metal, alloy, carbon fiber, rubber, resin, and plastic.

Another object of the present invention is to provide a puncture device, which is effective in sealing during operation.

To achieve the purpose, the utility model adopts the following technical proposal:

a puncture outfit comprises the rod sealing structure, wherein the rod is a puncture needle.

The utility model has the advantages that:

this embodiment provides a member seal structure, this member seal structure includes elastic sealing cover and elastic bracket, the elastic sealing cover is gone up to run through to be equipped with the passageway of establishing that wears that supplies the member to pass, elastic bracket establishes structure and a plurality of arm that supports including the cover, the cover is established the structure cover and is established on the elastic sealing cover, the link and the cover of supporting the arm establish structural connection, support and press end elasticity to press on the elastic sealing cover, so that the inner wall of the sealed end of elastic sealing cover and the outer wall sealing butt of member, a plurality of support of supporting the arm press the end to be the annular and arrange in order to form and support the clamping ring, the internal diameter of supporting the clamping ring is configured to carry out adaptability ground increase or reduce according to the diameter of member, so that the sealed different diameters's of. This rod piece seal structure utilizes elastic bracket can support the sealed end of elastic sealing cover and press on the member through setting up elastic bracket to still can ensure good leakproofness when the diameter of member changes on a large scale, needn't customize elastic sealing cover again, be favorable to reduce cost.

Drawings

Fig. 1 is a schematic structural view of a rod sealing structure provided by the present invention sleeved on a large-diameter rod;

fig. 2 is an exploded view of the rod sealing structure provided by the present invention sleeved on a large-diameter rod;

fig. 3 is a schematic structural view of a sealing sub-sleeve of the rod sealing structure provided by the present invention;

fig. 4 is a schematic structural view of the elastic bracket sleeved on the large-diameter rod member according to the present invention;

fig. 5 is a front view of the elastic bracket sleeved on the large-diameter rod member provided by the present invention;

fig. 6 is a top view of the elastic bracket sleeved on the large-diameter rod member provided by the present invention;

fig. 7 is a schematic structural view of the rod sealing structure provided by the present invention sleeved on a small-diameter rod;

fig. 8 is a schematic structural view of the elastic bracket sleeved on the small-diameter rod member according to the present invention;

fig. 9 is a front view of the elastic bracket of the present invention sleeved on the small-diameter rod;

fig. 10 is a top view of the elastic bracket sleeved on the small-diameter rod member provided by the present invention.

In the figure:

100. a rod member;

1. an elastic sealing sleeve; 11. sealing the sub-sleeve; 101. a taper sleeve portion; 102. opening the opening; 103. a first flanging; 104. a first loop portion; 105. a first connection hole;

2. an elastic bracket; 21. a sheathing structure; 211. a second collar portion; 212. second flanging; 22. a pressing arm; 221. a first pressing arm; 222. a second pressing arm; 2201. a first connecting rod; 2202. a second connecting rod; 2203. a pressing rod; 23. and a second connection hole.

Detailed Description

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

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

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection or a removable connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

The present embodiment provides a rod sealing structure that can achieve sealing between the rod 100 in a moving state and the outside, and can be applied to rod 100 of different diameters. As shown in fig. 1 to 10, the rod sealing structure specifically includes an elastic sealing sleeve 1 and an elastic bracket 2. Wherein, the elastic sealing sleeve 1 is provided with a through channel, and the through channel is arranged through the elastic sealing sleeve 1 so as to allow the rod member 100 to pass through. One end of the elastic sealing sleeve 1 is a penetrating end, the other end of the elastic sealing sleeve is a sealing end, a penetrating channel forms an insertion opening on the penetrating end, a sealing opening is formed on the sealing end, and the rod piece 100 penetrates into the penetrating channel from the insertion opening and penetrates out of the sealing opening. In this embodiment, the rod 100 is a cylindrical rod, but in other embodiments, the rod 100 may be an elliptical rod with an elliptical cross-section.

Alternatively, the through channel is a tapered through hole, the diameter of the insertion opening is greater than that of the rod 100, the diameter of the sealing opening is equal to or slightly smaller than that of the smallest rod 100, and when the diameter of the sealing opening is equal to or slightly smaller than that of the rod 100, since the elastic sealing sleeve 1 is made of an elastic material, such as rubber, gel or silica gel, etc., the size of the sealing opening can be adjusted according to the diameter of the rod 100, so that the rod 100 can pass through smoothly.

The elastic bracket 2 is used for pressing the sealing end of the elastic sealing sleeve 1 against the rod member 100, so that no matter what size relationship the diameter of the rod member 100 and the diameter of the sealing opening are, the inner wall of the sealing end and the outer wall of the rod member 100 can be always in sealing abutment, and a good sealing effect between the elastic sealing sleeve 1 and the rod member 100 is ensured. Specifically, as shown in fig. 4 to 6 and 8 to 10, the elastic bracket 2 includes a sleeving structure 21 and a plurality of pressing arms 22, where the sleeving structure 21 is an annular structure and can be sleeved on the elastic sealing sleeve 1 for relatively fixing the elastic bracket 2 and the elastic sealing sleeve 1. One end of the pressing arm 22 is a connecting end, the other end is a pressing end, the connecting end is connected with the sleeving structure 21 at an included angle, the pressing end is elastically pressed on the elastic sealing sleeve 1 to provide a pressing force to the sealing end of the elastic sealing sleeve 1, so that the inner wall of the sealing end is tightly abutted to the outer wall of the rod 100 in a sealing manner. The elastic bracket 2 can be manufactured by multi-part connection assembly or integral molding, welding, bonding, 3D printing, casting or encapsulation.

In this embodiment, the elastic bracket 2 is a basketball net, the pressing arm 22 can be made of one or a combination of metal, alloy, carbon fiber, rubber, resin and plastic with good elasticity, and the alloy can be selected from memory alloy, titanium alloy, stainless steel or spring steel, so that the elastic bracket 2 has good elasticity, and the included angle between the pressing arm 22 and the sleeve structure 21 can be changed under the action of external force to adapt to different elastic sealing sleeves 1. And, the end that supports that a plurality of arm 22 that support of this elastic bracket 2 were pressed is the annular and arranges in order to form and support the clamping ring, supports the circumference setting that the clamping ring encircles the sealed end of elastic sealing cover 1, supports the diameter that the clamping ring can change under the exogenic action.

Specifically, when the diameter of the rod 100 penetrating through the elastic sealing sleeve 1 changes, for example, as shown in fig. 1 and 7, when the rod 100 with a large diameter changes into the rod 100 with a small diameter, or the rod 100 with a small diameter changes into the rod 100 with a large diameter, the size of the sealing end of the elastic sealing sleeve 1 is reduced or increased under the supporting action of the rod 100, and the distance between adjacent supporting arms 22 can be changed correspondingly according to the size change of the elastic sealing sleeve 1, so that the inner diameter of the supporting ring is adaptively reduced or increased, and the supporting ring is ensured to be stably supported on the elastic sealing sleeve 1 all the time.

This rod piece seal structure is through setting up elastic bracket 2, utilize elastic bracket 2 to support the sealed end of elastic sealing cover 1 and press on rod piece 100, thereby still can ensure good leakproofness when the diameter of rod piece 100 changes on a large scale, not only make elastic sealing cover 1 can seal up the rod piece 100 of different diameters, needn't customize elastic sealing cover 1 again, be favorable to reduce cost, and reduced the size precision requirement to the sealed end of elastic sealing cover 1, even the size of sealed end appears the deviation, still can carry out good sealing to rod piece 100 under elastic bracket 2 supports to press.

In order to enable the elastic sealing sleeve 1 to automatically adjust its size according to the rod 100 penetrating therethrough, so as to adapt to rod 100 with different diameters, so as to improve the versatility of the elastic sealing sleeve 1, as shown in fig. 2, in the present embodiment, the elastic sealing sleeve 1 includes a plurality of sealing sub-sleeves 11 nested, specifically, the number of the sealing sub-sleeves 11 may be set to two, three, four or more, and in the present embodiment, four.

Specifically, as shown in fig. 3, the sealing sub-sleeve 11 is in a shape of a valve funnel, and specifically includes a taper sleeve portion 101 and a first flange 103, the taper sleeve portion 101 includes a large diameter end and a small diameter end, the first flange 103 is disposed to protrude outward along a circumferential direction of the large diameter end of the taper sleeve portion 101, and the small diameter end of the taper sleeve portion 101 is a sealing end of the elastic sealing sleeve 1. Taper sleeve portion 101 runs through along the generating line direction and is provided with open mouth 102, and open mouth 102 extends and runs through first turn-ups 103, and open mouth 102's width is adjusted as required, and two adjacent sealed sub-cover 11's open mouth 102 dislocation set. Optionally, a first ring sleeve portion 104 is disposed between the taper sleeve portion 101 and the first flange 103, the first ring sleeve portion 104 is disposed perpendicular to the first flange 103 to form an L-shaped structure, and the first ring sleeve portion 104 is connected to the large-diameter end of the taper sleeve portion 101.

The sealing sub-sleeves 11 have the same structure and slightly different sizes, so that the sealing sub-sleeves 11 can be nested to form a whole. When the plurality of sealing sub-sleeves 11 are assembled into the elastic sealing sleeve 1, the plurality of sealing sub-sleeves 11 are sequentially nested from inside to outside or from outside to inside according to the size; then, taking the axial direction of the seal sub-sleeve 11 as a center, rotating two adjacent seal sub-sleeves 11 to adjust the positions and the overlapping ranges of the opening ports 102 of the two adjacent seal sub-sleeves 11; finally, the first flanges 103 of the two adjacent sealing sub-sleeves 11 are abutted against each other, so that the assembly of the elastic sealing sleeve 1 is completed.

The funnels of the sealing sub-sleeves 11 form the sealing ports of the elastic sealing sleeve 1, and the sealing ports are in a contraction state in a natural state, and the diameter of the sealing ports is smaller than that of the minimum rod piece 100. When the rod member 100 passes through the sealing opening of the elastic sealing sleeve 1, under the expansion and compression action of the rod member 100, the sealing opening of the elastic sealing sleeve 1 and the adjacent taper sleeve part 101 of the sealing sub-sleeve 11 can move relatively, so that the diameter of the sealing opening of the elastic sealing sleeve 1 changes in real time along with the expansion or reduction of the diameter of the rod member 100, and the rod member 100 can be adapted to the diameter of the sealing opening of the elastic sealing sleeve 1.

In the working process of the rod sealing structure, in order to avoid separation between the sealing sub-sleeves 11 and between the elastic sealing sleeve 1 and the elastic bracket 2, the first connecting hole 105 is formed in the first flanging 103, the second connecting hole 23 is formed in the sleeve forming structure 21 of the elastic bracket 2, after the sealing sub-sleeves 11 are nested and assembled with the elastic bracket 2, the first connecting hole 105 and the second connecting hole 23 can be penetrated by a connecting piece, relative fixation between the sealing sub-sleeves 11 and between the elastic sealing sleeve 1 and the elastic bracket 2 is realized, and separation is avoided. Optionally, the number of the first connecting holes 105 and the second connecting holes 23 may be set to be plural according to the requirement, and set along the circumferential direction of the first flange 103 and the sleeve structure 21, respectively.

In addition, the connecting piece can be fixed on other structures after passing through the first connecting hole 105 and the second connecting hole 23, for example, when the rod piece sealing structure is used for a puncture outfit, the rod piece 100 is a puncture needle, and the connecting piece can be fixed on other internal components of the puncture outfit after passing through the first connecting hole 105 and the second connecting hole 23, so that the phenomenon that the rod piece sealing structure is separated from the interior of the puncture outfit in the process of moving up and down is avoided.

It should be noted that the connecting member is only arranged to circumferentially limit the large-diameter end of the taper sleeve portion 101 of the plurality of seal sub-sleeves 11, and is not arranged to circumferentially limit the small-diameter end of the taper sleeve portion 101 of the seal sub-sleeve 11, so that the diameter of the sealing opening of the elastic sealing sleeve 1 does not change in real time along with the expansion or reduction of the diameter of the rod 100.

As shown in fig. 4 to 10, in the present embodiment, the sleeving structure 21 includes a second ring sleeve portion 211 and a second flange 212 protruding outward along the circumferential direction of the second ring sleeve portion 211, the second ring sleeve portion 211 and the second flange 212 are vertically connected to form an L shape, the second ring sleeve portion 211 is used for being sleeved on the first ring sleeve portion 104 to realize the relative fixation of the elastic sealing sleeve 1 and the elastic bracket 2, and the second flange 212 and the first flange 103 are stacked to improve the fixation effect.

The connecting end of the pressing arm 22 is connected with the second annular sleeve portion 211, and the pressing end is in a free state. Alternatively, as shown in fig. 6 and 10, the pressing arm 22 includes a first connecting rod 2201, a second connecting rod 2202, and a pressing rod 2203 connected in this order. The first connecting rod 2201 is a linear rod, and one end of the first connecting rod 2202 away from the second connecting rod 2202 is a connecting end of the pressing arm 22, and is used for being connected with the second annular sleeve portion 211, and the connecting mode can be welding or bonding. The second connecting rod 2202 is attached to the conical surface of the taper sleeve portion 101, and optionally, the second connecting rod 2202 may be a linear rod or a corrugated rod, preferably a corrugated rod, so that a plurality of abutting points are formed on the taper sleeve portion 101 of the elastic sealing sleeve 1, and the abutting effect on the elastic sealing sleeve 1 is improved. The pressing rod 2203 is a pressing end of the pressing arm 22, and elastically presses against the sealing end of the elastic sealing sleeve 1. Optionally, support and press pole 2203 to be the arc pole, and the middle part of arc pole supports and presses on elastic sealing cover 1, and the free end of arc pole sets up to keeping away from elastic sealing cover 1's direction slope, so set up and to make the arc pole and elastic sealing cover 1's sealed end point contact to the increase is to the pressure of supporting of sealed end, improves the sealed effect of sealed end to member 100.

Further, in the present embodiment, the pressing arms 22 are divided into two groups, namely a first pressing arm group and a second pressing arm group. The pressing arms 22 in the first pressing arm set are referred to as first pressing arms 221, the pressing arms 22 in the second pressing arm set are referred to as second pressing arms 222, the number of the first pressing arms 221 and the number of the second pressing arms 222 are multiple, and the first pressing arms 221 and the second pressing arms 222 are both arranged in an inclined manner relative to the axial direction of the rod 100, and the inclined directions are opposite. That is to say, the first pressing arms 221 and the second pressing arms 222 form a certain inclined angle with the axis of the second annular sleeve portion 211, the first pressing arms 221 are sequentially arranged around the axis of the second annular sleeve portion 211, and the second pressing arms 222 are sequentially arranged reversely around the axis of the second annular sleeve portion 211.

In this embodiment, the first pressing arms 221 of the first pressing arm set rotate counterclockwise along the circumferential direction of the sleeve structure 21, and the second pressing arms 222 of the second pressing arm set rotate clockwise along the circumferential direction of the sleeve structure 21. The two sets of pressing arms 22 may be disposed opposite to each other with respect to a symmetry plane of the sleeve structure 21, or may be disposed in a mutually intersecting manner, preferably in an intersecting manner, so as to further improve a pressing effect of the pressing arms 22 on the elastic sealing sleeve 1.

Specifically, in the present embodiment, as shown in fig. 4 to 10, one second pressing arm 222 is disposed between two adjacent first pressing arms 221, one first pressing arm 221 is disposed between two adjacent second pressing arms 222, and the adjacent first pressing arms 221 and the adjacent second pressing arms 222 are disposed in an intersecting manner so that the plurality of pressing arms 22 of the elastic bracket 2 intersect to form a mesh structure. The pressing arm 22 located at the outer side in the mesh structure can provide a pressing force to the pressing arm 22 located at the inner side, thereby further improving the pressing effect. Of course, in other embodiments, two or more first pressing arms 221 may be provided as a group, one group of second pressing arms 222 is provided between two groups of first pressing arms 221, and one group of second pressing arms 222 may include one or more second pressing arms 222, and adjacent groups of first pressing arms 221 and one group of second pressing arms 222 are provided in an intersecting manner.

The assembly process of the rod sealing structure is as follows:

the elastic bracket 2 is sleeved outside the funnel-shaped elastic sealing sleeve 1, namely the lower surface of the first flanging 103 of the elastic sealing sleeve 1 is directly pressed down on the second flanging 212 of the elastic bracket 2 and is in tight contact with the elastic bracket 2, and the outer surface of the first ring sleeve part 104 of the elastic sealing sleeve 1 is directly pressed against the inner surface of the second ring sleeve part 211 of the elastic bracket 2 and is in tight contact with the elastic bracket 2. That is, the funnel-shaped elastic sealing sleeve 1 is directly sleeved in the elastic bracket 2 and they are matched in shape and in close contact with each other, and it should be noted that the elastic sealing sleeve 1 and the elastic bracket 2 are in close contact but in a free and unconnected state. The pressing arm 22 presses against the outer wall of the elastic sealing sleeve 1. The rod 100 passes through the passage of the elastic sealing sleeve 1, and the plurality of sealing sub-sleeves 11 constituting the freely movable part of the elastic sealing sleeve 1 are expanded by bearing the tension of the rod 100. Due to the pressing force of the pressing arm 22 and the contraction force of the elastic sealing sleeve 1, the sealing sub-sleeves 11 are pressed on the outer wall of the rod 100, and the overlapped parts of the plurality of sealing sub-sleeves 11 are always in close contact, thereby achieving the sealing effect. When the diameter of the rod 100 changes, the pressing arm 22 can provide a larger pressing force, and the elastic deformation reaction speed is high, so that the tight contact between the sealing sub-sleeves 11 and the outer wall of the rod 100 can be ensured, although the overlapped parts of the sealing sub-sleeves 11 move relative to each other due to the adaptation with the rod 100, the pressing force provided by the pressing arm 22 can enable the overlapped parts of the sealing sub-sleeves 11 to be always in tight contact, and the sealing performance is ensured well.

The embodiment also provides a puncture outfit, which comprises the rod sealing structure, and the puncture needle of the puncture outfit is the rod 100. By using the rod piece sealing structure, the sealing performance in the puncture process can be ensured, and the operation effect is improved.

It is obvious that the above embodiments of the present invention are only examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.

Claims (10)

1. A rod sealing structure, comprising:

the elastic sealing sleeve (1) is provided with a penetrating channel for a rod piece (100) to penetrate through, and one end of the elastic sealing sleeve (1) is a sealing end;

the elastic support frame (2), the elastic support frame (2) includes a sleeving structure (21) and a plurality of pressing arms (22), the sleeving structure (21) is sleeved on the elastic sealing sleeve (1), one end of each pressing arm (22) is a connecting end, the other end of each pressing arm is a pressing end, the connecting end is connected with the sleeving structure (21), and the pressing ends are elastically pressed on the elastic sealing sleeve (1) so that the inner walls of the sealing ends are in sealing butt joint with the outer walls of the rod pieces (100);

the pressing ends of the pressing arms (22) are annularly arranged to form a pressing ring, and the inner diameter of the pressing ring can be increased or decreased according to the diameter of the rod piece (100), so that the elastic sealing sleeve (1) can seal the rod pieces (100) with different diameters.

2. The rod sealing structure according to claim 1,

the plurality of pressing arms (22) comprise a first pressing arm group and a second pressing arm group, the pressing arms (22) in the first pressing arm group are first pressing arms (221), the pressing arms (22) in the second pressing arm group are second pressing arms (222), and the first pressing arms (221) and the second pressing arms (222) are obliquely arranged relative to the axis direction of the rod piece (100) and opposite in oblique direction.

3. The rod sealing structure according to claim 2,

at least one second pressing arm (222) is arranged between every two adjacent first pressing arms (221), at least one first pressing arm (221) is arranged between every two adjacent second pressing arms (222), and the adjacent first pressing arms (221) and the adjacent second pressing arms (222) are arranged in a crossed mode.

4. The rod sealing structure according to claim 1,

elastic sealing cover (1) includes a plurality of nested sealed sub-cover (11) that set up, sealed sub-cover (11) include taper sleeve portion (101) and follow the circumference of the big diameter end of taper sleeve portion (101) outwards protruding first turn-ups (103) of establishing, taper sleeve portion (101) run through along the generating line direction and are provided with open mouth (102), open mouth (102) extend and run through first turn-ups (103), adjacent two sealed sub-cover (11) open mouth (102) dislocation set.

5. The rod sealing structure according to claim 4,

a first ring sleeve part (104) is arranged between the taper sleeve part (101) and the first flanging (103);

the sleeve structure (21) comprises a second annular sleeve portion (211) and a second flanging (212) arranged outwards and convexly in the circumferential direction of the second annular sleeve portion (211), the second annular sleeve portion (211) is arranged on the first annular sleeve portion (104) in a sleeved mode, and the second flanging (212) and the first flanging (103) are arranged in a stacked mode.

6. The rod sealing structure according to claim 4,

the pressing arm (22) comprises a first connecting rod (2201), a second connecting rod (2202) and a pressing rod (2203), the first connecting rod (2201) is connected with the sleeving structure (21), the second connecting rod (2202) is attached to the conical surface of the conical sleeve portion (101), and the pressing rod (2203) is pressed on the elastic sealing sleeve (1).

7. The rod sealing structure according to claim 6,

the second connecting rod (2202) is a straight rod or a corrugated rod.

8. The rod sealing structure according to claim 6,

the pressing rod (2203) is an arc-shaped rod, the middle of the arc-shaped rod is pressed on the elastic sealing sleeve (1), and the free end of the arc-shaped rod is obliquely arranged in the direction far away from the elastic sealing sleeve (1).

9. The rod sealing structure according to any one of claims 1 to 8,

the material of the pressing arm (22) is any one of metal, alloy, carbon fiber, rubber, resin and plastic.

10. A puncture instrument, characterized by comprising the stem seal structure according to any one of claims 1 to 9, wherein the stem (100) is a puncture needle.

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