CN220734201U - Freezing pole that carries - Google Patents

Abstract

The utility model discloses a freezing carrying rod which comprises a hollow outer sleeve and a carrying rod sleeved in the outer sleeve, wherein a balancing weight is arranged on the outer sleeve and is close to one end part of the outer sleeve; one end of the carrying rod is fixed with a slide glass for placing biological samples, one end of the carrying rod, which is far away from the slide glass, is provided with a handle, and the carrying rod also comprises a hard tube arranged between the handle and the slide glass; when the carrying rod is sleeved with the outer sleeve, one end of the outer sleeve, which is provided with the balancing weight, is close to one end of the carrying rod, where the carrying piece is located; the slide is provided with a groove, and the biological sample is placed in the groove.

Description

Freezing pole that carries

Technical Field

The utility model relates to the field of reproductive medicine, in particular to a freezing carrying rod.

Background

At present, vitrification freezing carriers are divided into open freezing carriers and closed freezing carriers, and the open freezing carriers can be directly contacted with liquid nitrogen, so that the aim of quickly cooling and reducing ice crystal damage can be achieved, but the open freezing carriers can be directly contacted with the liquid nitrogen, cross contamination among embryos is easy to occur, and therefore, the closed freezing carriers are generally adopted for freezing embryos for auxiliary reproductive centers.

The prior closed type freezing carrier is a closed type freezing carrier rod disclosed in Chinese patent publication No. CN218499880U, and comprises: the device comprises a carrying rod, a counterweight, an inner sleeve and an outer sleeve; the carrying rod comprises a connecting part, a handheld part and a slide part, wherein the handheld part and the slide part are respectively arranged at two ends of the connecting part; the counterweight piece comprises a hollow nesting part, a hollow part and a solid part; one end of the hollow nested part is fully open, and the other end is closed but provided with a through hole for the slide part of the carrier rod to pass through; the closed end of the hollow nesting part is fixedly connected with the solid part through a supporting piece to form a hollowed part; the inner sleeve is of a hollow tube body structure, the upper end of the inner sleeve is detachably connected with the connecting part of the carrier rod, and the connecting part of the carrier rod and the slide glass part with partial size are sleeved inside the inner sleeve; the lower end of the inner sleeve is matched with the hollow nesting part in size so as to realize detachable connection between the inner sleeve and the counterweight; the outer sleeve is of a hollow structure with one end being fully opened and the other end being fully closed; the outer sleeve is sleeved on the outer side of the inner sleeve and the counterweight piece after being detachably connected, the counterweight piece corresponds to the closed end of the outer sleeve, and the handheld part of the carrying rod corresponds to the open end of the sleeve.

However, the closed frozen carrier provided by the above patent has large volume, is difficult to operate, cannot meet the use requirements of clinic and laboratory, and has the risk of dropping biological samples on the slide.

Disclosure of Invention

In order to solve the problems in the prior art, the utility model discloses a freezing carrying rod.

The freezing carrying rod comprises a hollow outer sleeve and a carrying rod sleeved in the outer sleeve, wherein a balancing weight is arranged on the outer sleeve and is close to one end part of the outer sleeve;

one end of the carrying rod is fixed with a slide glass for placing biological samples, and one end of the carrying rod, which is far away from the slide glass, is provided with a handle; when the carrying rod is sleeved with the outer sleeve, one end of the outer sleeve, which is provided with the balancing weight, is close to one end of the carrying rod, where the carrying piece is located;

the slide is provided with a groove, and the biological sample is placed in the groove.

Specifically, a balancing weight is arranged at one end part of the outer sleeve, and the position of the balancing weight is close to the position of the slide after the carrying rod is sleeved with the outer sleeve, so that when the frozen carrying rod is stored, one end of the balancing weight is always downward due to the action of gravity, on one hand, the structure ensures that a biological sample on the slide is always in a low-temperature environment of freezing liquid, on the other hand, the whole position of the frozen carrying rod is stable, and the frozen carrying rod cannot float on the freezing liquid and cannot shake;

the slide is provided with the groove, the biological sample is placed in the groove, and compared with a planar slide, the groove on the slide can effectively limit the position of the biological sample on one hand, so that the possibility of losing the biological sample can be reduced.

Preferably, the groove on the slide comprises a bottom wall and two side walls arranged on two opposite sides of the bottom wall, the distance between the two side walls in the direction away from the bottom wall is increased, and the included angle alpha between the bottom wall and the side walls is more than or equal to 120 degrees and less than 180 degrees.

Specifically, the distance between the two side walls in the direction away from the bottom wall gradually becomes larger, so that the biological sample can be conveniently taken and placed on the groove.

Preferably, a first hollowed-out part penetrating through the bottom wall is arranged on the bottom wall of the groove, and the value range of the width a of the first hollowed-out part is more than 0 and less than or equal to 100 mu m.

More preferably, the two side walls of the groove are respectively provided with a second hollowed-out part, the second hollowed-out parts are arranged in pairs and penetrate through the side wall where each second hollowed-out part is located, and the value range of the width b of the second hollowed-out part is more than 0 and less than or equal to 200 mu m.

Specifically, as the change of the radius of the liquid drop wrapping the biological sample on the slide glass can cause the change of osmotic pressure, namely, the biological sample is in an environment with the change of osmotic pressure, the chromatin structure is easy to loosen, the damage to DNA is further increased, the ductility of the liquid drop in the groove can be effectively reduced by arranging the structure of the first hollowed-out part/the second hollowed-out part on the groove, the radius of the liquid drop is maintained to be relatively unchanged, and the biological sample is further ensured to be in an environment with the stable osmotic pressure, so that the damage probability of the DNA is reduced.

Preferably, the slide has an outer diameter in the range of 1.2-1.6mm.

Preferably, the slide has a thickness of no more than 0.28mm.

Preferably, the carrying rod further comprises a hard tube arranged between the handle and the slide, and a convex strip is arranged on the carrying rod between the hard tube and the slide/handle and used for preventing the carrying rod sleeved in the outer sleeve from displacement.

Specifically, a hard tube is arranged on the carrying rod, the hardness of the hard tube is high and cannot be cut off by scissors, the hard tube can be made of metal, when a biological sample on a slide needs to be taken out, the position, corresponding to the hard tube, of the outer sleeve is directly cut off, and then the carrying rod is taken out; the outer sleeve is usually made of plastic, so that the outer sleeve is quite easy to cut, and the outer sleeve at the position corresponding to the hard tube is cut, so that the carrying rod cannot be damaged, and the possibility that the carrying rod is damaged in the process of taking out the carrying rod is reduced.

If the carrier rod and the outer sleeve are sleeved, the relative position between the carrier rod and the outer sleeve cannot be stabilized, or the carrier rod and the inner wall of the outer sleeve can be interfered with each other, so that the biological sample on the carrier rod is damaged, and the carrier rod is further caused to fall off from the inner wall of the outer sleeve, so that the structure of the raised strips is necessary to stabilize the relative position between the carrier rod and the outer sleeve.

Preferably, an exhaust groove is arranged on the carrying rod between the hard tube and the slide/handle, at least one exhaust groove is arranged on the carrying rod, and when the carrying rod is sleeved into the outer sleeve, at least part of gas in the outer sleeve is exhausted through the exhaust groove.

Specifically, because the outer sleeve and the carrying rod are of elongated structures, when the carrying rod is sleeved with the outer sleeve, air in the outer sleeve must be discharged in the sleeved process, otherwise, due to the effect of pressure difference resistance, the carrying rod is difficult to be completely sleeved into the outer sleeve, and therefore the auxiliary exhaust of the structure provided with the exhaust groove is suitable.

Preferably, the balancing weight comprises a body with the diameter smaller than the inner diameter of the outer sleeve and a guide table arranged at one end of the body, the guide table is in a round table shape and is reduced in diameter towards the direction away from the body, and the minimum diameter of the guide table is smaller than the inner diameter of the outer sleeve and the maximum diameter of the guide table is larger than the inner diameter of the outer sleeve.

Preferably, the body of the balancing weight is provided with at least one annular boss, and the diameter of the annular boss is larger than the inner diameter of the outer sleeve.

Specifically, the position between the balancing weight and the outer sleeve is required to be relatively stable, on one hand, the balancing weight can be pre-buried when the outer sleeve is prepared, so that the balancing weight and the outer sleeve are integrally injection molded; on the other hand, the structure of the balancing weight can be designed, and the balancing weight can be smoothly pushed into the outer sleeve by utilizing the structure of the guide table, meanwhile, as the maximum diameter of the guide table is larger than the inner diameter of the outer sleeve, the tight fit between the guide table and the outer sleeve is realized, and meanwhile, the balancing weight is also provided with a plurality of annular bosses with the diameter larger than the inner diameter of the outer sleeve, so that the stability of the relative position between the outer sleeve and the balancing weight can be further improved, and the balancing weight is prevented from generating displacement in the outer sleeve so as to damage biological samples on a slide glass.

Preferably, at least one end of the outer sleeve is provided with a guide opening, and the diameter of the guide opening is increased towards the direction away from the outer sleeve.

Specifically, be provided with the structure of guiding mouth, reduced the assembly degree of difficulty between outer tube and carrier bar, the balancing weight.

Preferably, the device further comprises a handheld rod, wherein the handheld rod comprises an extending part used for extending into the outer sleeve to mount the carrier rod, and a handheld part for an operator to hold, and the diameter of the handheld part is far greater than the maximum diameter of the guide opening.

In addition, if the outer sleeve and the balancing weight are integrally formed, the outer sleeve is of a structure with one end open and one end sealed, and after the carrier rod is plugged into the outer sleeve, sealing treatment is needed to be carried out on one end of the opening;

if the outer sleeve and the balancing weight are not integrally formed, the outer sleeve is of a structure with openings at two ends, after the balancing weight is plugged into the outer sleeve, the opening close to the balancing weight is sealed, and after the carrying rod is plugged into the outer sleeve, the other end is sealed.

Compared with the prior art, the utility model has the following advantages:

1. by the structure that the grooves are formed in the slide, stability of biological samples placed in the grooves of the slide is remarkably improved, and risks that the biological samples fall off the slide are effectively reduced; meanwhile, most of the surface of the biological sample placed on the slide glass is separated from the freezing liquid by only one layer of outer sleeve, so that the freezing rate of the tissue to be frozen is improved.

2. Through set up the structure of first fretwork portion/second fretwork portion on the recess, the effectual ductility of drop in the recess that reduces has kept the radius of drop unchanged relatively, and then guaranteed that biological sample is in the stable environment of osmotic pressure to the damage probability of DNA has been reduced.

3. Through the structure of fixed stereoplasm pipe at the carrier bar, reduced the dismantlement degree of difficulty between carrier bar and the outer tube, and then reduced when taking out the carrier bar wait to freeze the tissue/the possibility that frozen tissue was damaged.

4. By designing the balancing weight into a structure with the guide table and the annular boss, the structure and the volume of the balancing weight are simplified on the premise of ensuring that the balancing weight and the outer sleeve are not displaced relatively, and the volume and the operation difficulty of the freezing carrying rod are further reduced, so that the freezing carrying rod provided by the utility model has higher practicability.

Drawings

FIG. 1 is a schematic view of the overall structure of a frozen carrier bar according to the present utility model;

FIG. 2 is a cross-sectional view of a slide of a frozen carrier bar provided by the utility model with a first hollowed-out portion;

FIG. 3 is a cross-sectional view of a slide of a frozen carrier bar provided by the utility model with two first hollowed-out parts;

FIG. 4 is a cross-sectional view of a slide of a frozen carrier bar provided by the utility model with a pair of second hollowed-out parts;

FIG. 5 is a schematic view of an outer sleeve of a frozen carrier bar according to the present utility model;

FIG. 6 is a schematic view of a counterweight of a frozen carrier bar according to the utility model;

FIG. 7 is a schematic view of an assembly of a frozen carrier bar according to the present utility model;

FIG. 8 is a schematic view of an assembly process of a frozen carrier bar according to the present utility model;

fig. 9 is a graph of cooling efficiency of a slide with a second hollowed-out part of a frozen carrier bar according to the present utility model;

FIG. 10 is an enlarged schematic view of FIG. 9A;

fig. 11 is a graph of cooling efficiency of a slide with a first hollowed-out part of a frozen carrier bar according to the present utility model;

FIG. 12 is an enlarged schematic view at B in FIG. 11;

fig. 13 is a comparison chart of cooling efficiency of a slide with a second hollow portion and a first hollow portion of a frozen carrier bar according to the present utility model.

Detailed Description

The utility model will be further described with reference to the drawings and specific examples.

As shown in fig. 1, 5 and 7, the freezing carrying rod comprises a hollow outer sleeve 10 and a carrying rod 20 sleeved in the outer sleeve 10, wherein a balancing weight 30 is arranged on the outer sleeve 10, and the balancing weight 30 is arranged near one end part of the outer sleeve 10;

a slide 40 for placing a biological sample is fixed at one end of the carrier rod 20, and a handle 21 is arranged at one end of the carrier rod 20 away from the slide 40; when the carrying rod 20 is sleeved with the outer sleeve 10, one end of the outer sleeve 10 provided with the balancing weight 30 is close to one end of the carrying rod 20 where the slide 40 is located;

the slide 40 is provided with a groove 41, and a biological sample is placed in the groove 41; the recess 41 in the slide 40 comprises a bottom wall 42 and two side walls 43 disposed on opposite sides of the bottom wall 42, the distance between the two side walls 43 becomes larger toward the direction away from the bottom wall 42, and the included angle α between the bottom wall 42 and the side walls 43 is in the range of 120 ° and α < 180 °.

The balancing weight 30 is arranged at one end part of the outer sleeve 10, and after the carrying rod 20 is sleeved with the outer sleeve 10, the position of the balancing weight 30 is close to the position of the slide 40, so that when the freezing carrying rod is frozen for storing the freezing liquid, due to the gravity effect, one end of the balancing weight 30 is always downward, on one hand, the biological sample on the slide 40 is always in a low-temperature environment of the freezing liquid, and on the other hand, the whole position of the freezing carrying rod is stable and cannot float on the freezing liquid and shake;

the structure of the recess 41 is provided on the slide 40, and a biological sample (the biological sample may be eggs, oocytes, fertilized eggs, blastocysts, and cells of embryos and/or multicellular bodies derived from human beings, non-human primates, dogs, cows, horses, pigs, sheep, goats, cats, buffalo, guinea pigs, hamsters, rabbits, rats, mice, etc.) is placed in the recess 41, so that the recess 41 on the slide 40 can effectively limit the position of the biological sample to reduce the possibility of losing the biological sample, compared with a planar slide, and in addition, compared with a circular slide in the prior art, the slide 40 with the recess 41 provided in this embodiment has a shorter distance between the biological sample on the slide 40 and a freezing liquid, thereby more rapidly freezing the biological sample.

The arrangement of the two side walls 43 with increasing distance away from the bottom wall 42 makes the taking and placing of the biological sample on the recess 41 very convenient.

As shown in fig. 2 and 3, the bottom wall 42 of the groove 41 is provided with a first hollow portion 44 penetrating through the bottom wall 42, and the value range of the width a of the first hollow portion 44 is 0 < a.ltoreq.100 μm.

As shown in fig. 11-12, when the groove 41 with the first hollowed-out portion 44 is provided on the slide 40, and the value range of the width a of the first hollowed-out portion 44 is equal to or greater than 0 and equal to or less than 100 μm, the time required for cooling the biological sample placed on the slide 40 to-130 ℃ is smaller than that of the slide in the prior art (the slide which is planar and does not have the hollowed-out portion), as known in the prior art, the time required for cooling the biological sample to-130 ℃ is the most critical, and the shorter the time is, the less damage is caused to the biological sample on the slide 40; that is, the biological sample is frozen on such a slide 40 with less damage to the biological sample; meanwhile, as can be seen from fig. 11 to 12, when a=0, the freezing rate is the fastest, that is, the freezing rate is the fastest when the first hollowed-out portion 44 is not provided, but at this time, the liquid drop of the biological sample wrapped on the slide 40 has better ductility, so that the biological sample is in an environment with osmotic pressure change due to frequent change of the liquid drop, the chromatin structure is easy to be loose, and further damage to DNA is easy to be caused, and the ductility of the liquid drop in the groove 41 can be effectively reduced due to the structure of the first hollowed-out portion 44, the radius of the liquid drop is maintained to be relatively unchanged, and further the biological sample is ensured to be in an environment with stable osmotic pressure, thereby reducing the damage probability of DNA.

As shown in fig. 4, the two side walls 43 of the groove 41 are respectively provided with a second hollow portion 45, the second hollow portions 45 are arranged in pairs and penetrate through the respective side wall 43, and the value range of the width b of the second hollow portion 45 is more than 0 and less than or equal to 200 μm.

As shown in fig. 9-10, when the groove 41 with the second hollowed-out portion 45 is provided on the slide 40, and the value range of the width b of the second hollowed-out portion 45 is equal to or more than 0 and equal to or less than 200 μm, the time required for cooling the biological sample placed on the slide 40 to-130 ℃ is smaller than that of the slide in the prior art (the slide which is planar and is not provided with the hollowed-out portion); that is, the biological sample is frozen on such a slide 40 with less damage to the biological sample; meanwhile, as can be seen from fig. 9 to 10, when b=0, the freezing rate is fastest, that is, the second hollowed-out portion 45 is not provided, but the liquid drop of the biological sample wrapped on the slide 40 has better ductility, so that the liquid drop is frequently changed in size to cause the biological sample to be in an environment with osmotic pressure change, the chromatin structure is easy to loosen, and the damage to DNA is easy to increase, and the structure provided with the second hollowed-out portion 45 can effectively reduce the ductility of the liquid drop in the groove 41, maintain the radius of the liquid drop relatively unchanged, and further ensure that the biological sample is in an environment with stable osmotic pressure, thereby reducing the damage probability of DNA.

As shown in fig. 13, the cooling efficiency of the pair of second hollowed-out portions 45 provided on the side wall 43 of the groove 41 is faster than the cooling efficiency of the first hollowed-out portion 44 provided on the bottom wall 42 of the groove 41.

The slide 40 has an outer diameter in the range of 1.2-1.6mm.

The slide 40 has a thickness of no more than 0.28mm.

The carrier rod 20 further comprises a hard tube 22 arranged between the handle 21 and the slide 40, and a convex strip 23 is arranged on the carrier rod 20 between the hard tube 22 and the slide 40, wherein the convex strip 23 is used for preventing the carrier rod 20 sleeved in the outer sleeve 10 from displacing.

The carrier rod 20 is provided with the hard tube 22, the hard tube 22 has higher hardness and cannot be sheared by scissors, the hard tube 22 can be made of metal, when the biological sample on the slide 40 needs to be taken out, the position of the outer sleeve 10 corresponding to the hard tube 22 is directly sheared, and then the carrier rod 20 is taken out; since the outer sleeve 10 is typically made of plastic, it is quite easy to cut, and since the outer sleeve 10 is cut at a position corresponding to the hard tube 22, the carrier rod 20 is not damaged, thereby reducing the possibility of damage to the carrier rod 20 during removal of the carrier rod 20.

If the carrier rod 20 is sleeved with the outer sleeve 10, the relative position between the carrier rod 20 and the outer sleeve 10 cannot be stabilized, or the carrier rod 40 and the inner wall of the outer sleeve 10 can interfere with each other, so that the biological sample on the carrier rod 40 is damaged, and the carrier rod 20 is separated from the inner sleeve 10, so that the structure of the raised strips 23 is necessary to stabilize the relative position between the carrier rod 20 and the outer sleeve 10.

The carrying rod 20 between the hard tube 22 and the slide 40 is provided with at least one exhaust groove, and when the carrying rod 20 is sleeved into the outer sleeve 10, at least part of the gas in the outer sleeve 10 is exhausted through the exhaust groove.

Because the outer sleeve 10 and the carrying rod 20 are both of an elongated structure, when the carrying rod 20 is sleeved with the outer sleeve 10, air in the outer sleeve 10 must be discharged in the sleeving process, otherwise, due to the effect of pressure difference resistance, it is difficult to completely sleeve the carrying rod 20 into the outer sleeve 10, and therefore, the structure provided with the exhaust groove is suitable for assisting in exhaust.

As shown in fig. 6, the weight 30 includes a body 31 having a diameter smaller than the inner diameter of the outer sleeve 10 and a guide table 32 provided at one end of the body 31, the guide table 32 having a circular truncated cone shape and decreasing in diameter in a direction away from the body 31, the guide table 32 having a minimum diameter smaller than the inner diameter of the outer sleeve 10 and a maximum diameter larger than the inner diameter of the outer sleeve 10.

At least one annular boss 33 is arranged on the body 31 of the balancing weight 30, and the diameter of the annular boss 33 is larger than the inner diameter of the outer sleeve 10.

On the one hand, when the outer sleeve 10 is prepared, the balancing weight 30 is pre-buried, so that the balancing weight 30 and the outer sleeve 10 are integrally injection molded; on the other hand can design the structure of balancing weight 30, the structure of balancing weight 30 that this embodiment provided utilizes the structure of guide table 32, makes balancing weight 30 can be smooth by pushing into in the outer tube 10, simultaneously because the maximum diameter of guide table 32 is greater than the internal diameter of outer tube 10, realized the close-fitting of guide table 32 and outer tube 10 promptly, simultaneously, still be provided with a plurality of diameters on the balancing weight 30 and be greater than the annular boss 33 of outer tube 10 internal diameter, consequently can further improve the stability of the relative position between outer tube 10 and the balancing weight 30, avoid balancing weight 30 to produce the displacement in outer tube 10 and then damage the biological sample on slide 40.

At least one end of the outer sleeve 10 is provided with a guide opening 11, and the diameter of the guide opening 11 is increased in a direction away from the outer sleeve 10.

The structure provided with the guide opening 11 reduces the assembly difficulty between the outer sleeve 10, the carrying rod 20 and the balancing weight 30.

As shown in fig. 8, the hand-held rod 50 is further included, and the hand-held rod 50 includes an extending portion for extending into the outer sleeve 10 to mount the carrier rod 20, and a hand-held portion for the operator to hold, the hand-held portion having a diameter substantially larger than the maximum diameter of the guide opening 11.

In addition, if the outer sleeve 10 and the balancing weight 30 are integrally formed, the outer sleeve 10 has a structure with one end open and one end sealed, and after the carrier rod 20 is plugged into the outer sleeve 10, sealing treatment is required to be performed on one end of the opening;

if the outer sleeve 10 and the balancing weight 30 are not integrally formed, the outer sleeve 10 is of a structure with openings at both ends, after the balancing weight 30 is plugged into the outer sleeve 10, the opening close to the balancing weight 30 is sealed, and after the carrying rod 20 is plugged into the outer sleeve 10, the other end is sealed.

When the device is specifically used, the balancing weight 30 is plugged into the outer sleeve 10 from one end of the outer sleeve 10 to a designated position, and in the plugging process, one end of the balancing weight 30 provided with the guide table 32 is plugged into the outer sleeve 10, and one end of the outer sleeve 10 close to the balancing weight 30 is sealed (if the outer sleeve 10 and the balancing weight 30 are integrally formed, the step is not needed); placing the processed biological sample in the groove 41, holding the handle 21 to plug the carrier rod 20 into the outer sleeve 10 from the other end of the outer sleeve 10, when the carrier rod 20 mostly enters the outer sleeve 10, and an operator can not hold the handle 21, the carrier rod 20 can be plugged into a designated position with the aid of the hand rod 50, in addition, the handle 21 can be written with relevant information of the biological sample carried by the carrier rod 20, after the carrier rod 20 is plugged, sealing the two ends of the outer sleeve 10, after the sealing is finished, making one end of the balancing weight 30 face downwards, and placing the frozen carrier rod in a freezing liquid for freezing; when the biological sample is required to be taken, a required freezing carrying rod is selected according to biological sample information written in the handle 21, if a hard tube 22 is not arranged, the sealing of the freezing carrying rod is directly cut, the carrying rod 20 is pulled out, if the hard tube 22 is arranged, the outer sleeve 10 matched with the position of the hard tube 22 is cut, and the carrying rod 20 is taken out.

Claims (10)

1. The freezing carrying rod comprises a hollow outer sleeve and a carrying rod sleeved in the outer sleeve, and is characterized in that a balancing weight is arranged on the outer sleeve and is close to one end part of the outer sleeve;

one end of the carrying rod is fixed with a slide glass for placing biological samples, and one end of the carrying rod, which is far away from the slide glass, is provided with a handle; when the carrying rod is sleeved with the outer sleeve, one end of the outer sleeve, which is provided with the balancing weight, is close to one end of the carrying rod, where the carrying piece is located;

the slide is provided with a groove, and the biological sample is placed in the groove.

2. The frozen carrier bar as recited in claim 1 wherein the recess in the slide comprises a bottom wall and two side walls disposed on opposite sides of the bottom wall, the distance between the two side walls increasing in a direction away from the bottom wall, and the angle α between the bottom wall and the side walls has a value in the range of 120 ° and α < 180 °.

3. The frozen carrier bar according to claim 2, wherein the bottom wall of the groove is provided with a first hollowed-out part penetrating through the bottom wall, and the width a of the first hollowed-out part has a value range of 0 < a < 100 μm.

4. The frozen carrier bar according to claim 2, wherein the two side walls of the groove are respectively provided with a second hollow part, the second hollow parts are arranged in pairs and penetrate through the side wall where each of the second hollow parts is located, and the value range of the width b of the second hollow parts is more than 0 and less than or equal to 200 μm.

5. The frozen carrier bar of claim 3 or 4, wherein the slide has an outer diameter ranging from 1.2 mm to 1.6mm.

6. The frozen carrier bar of claim 5, wherein the slide has a thickness of no more than 0.28mm.

7. The frozen carrier bar as recited in claim 1, further comprising a rigid tube disposed between the handle and the slide, wherein the carrier bar between the rigid tube and the slide/handle has a protrusion for preventing displacement of the carrier bar within the sleeve.

8. The frozen carrier bar as recited in claim 1 or 7 wherein the carrier bar further comprises a rigid tube disposed between the handle and the slide, wherein a vent slot is provided in the carrier bar between the rigid tube and the slide/handle, wherein at least one vent slot is provided, and wherein at least a portion of the gas in the outer sleeve is vented through the vent slot when the carrier bar is sleeved into the outer sleeve.

9. The frozen carrier bar according to claim 1, wherein the balancing weight comprises a body with a diameter smaller than the inner diameter of the outer sleeve and a guide table arranged at one end of the body, the guide table is in a shape of a round table and is reduced in diameter in a direction away from the body, and the minimum diameter of the guide table is smaller than the inner diameter of the outer sleeve and the maximum diameter of the guide table is larger than the inner diameter of the outer sleeve; the body of balancing weight is equipped with at least one cyclic annular boss, the diameter of cyclic annular boss is greater than the internal diameter of overcoat pipe.

10. The frozen carrier bar as recited in claim 1, further comprising a hand-held bar including an extension for extending into the outer sleeve for mounting the carrier bar and a hand-held portion for an operator to hold, the hand-held portion having a diameter substantially greater than a maximum diameter of the guide opening.