CN210551700U - Autologous cartilage cutting device for hump nose - Google Patents

Abstract

The utility model discloses an augmentation rhinoplasty is with autologous cartilage cutting device, including base and the mounting bracket of setting on the base, the mounting bracket is including the crossbeam that is located the base top and the bracing piece that is located the crossbeam both ends, bracing piece bottom and base fixed connection, first blade, second blade and third blade are installed along the horizontal direction in proper order to the crossbeam below, the second blade be located the crossbeam middle part and with crossbeam fixed connection, first blade, third blade and crossbeam sliding connection, set up an installation logical groove parallel with crossbeam length direction on the crossbeam, install the adjusting part who is used for adjusting first blade and third blade position in the logical inslot of installation. The utility model provides a cutting device enables cartilage section back thickness homogeneous, and can reduce doctor's operation burden, promotes the augmentation rhinoplasty effect.

Description

Autologous cartilage cutting device for hump nose

Technical Field

The utility model belongs to the technical field of augmentation rhinoplasty technique and specifically relates to an augmentation rhinoplasty is with autologous cartilage cutting device.

Background

With the improvement of living standard of people, medical beauty treatment is accepted by people who love beauty and fashion and is greatly sought after; in the medical beauty project, the nose augmentation operation occupies a large proportion, the facial contour and the proportion of five sense organs are not coordinated due to the nose problem of many people, the mental stress of the part of people is large due to the unappealing appearance, the aspects of work, life, puppet selection and the like are affected, and great psychological troubles are brought to people, so that the appearance of people is improved through the nose augmentation operation, the confidence of people is stimulated, and the psychological stress is eliminated.

Among them, autologous cartilage is widely favored by people with a humped nose due to its advantages of no side effects, no rejection by their body, no difference in the natural nose after the formation of the humped nose. However, in the process of using autologous cartilage for nose augmentation, cartilage needs to be cut to adapt to the nasal type, the current cutting mode is mainly to cut by a doctor with a scalpel by feel, so that the cut cartilage is easy to have size deviation, the nose augmentation effect is affected, and meanwhile, the mind of the doctor is highly tense in the cutting process, and the operation state of the doctor is easily affected.

SUMMERY OF THE UTILITY MODEL

In order to solve the problem, the utility model provides a augmentation rhinoplasty is with autologous cartilage cutting device, the device can effectively cut cartilage for the cartilage size after the cutting is accurate, has optimized augmentation rhinoplasty effect.

The utility model discloses a realize above-mentioned purpose and specifically adopt following technical scheme:

the utility model provides a hump nose is with autologous cartilage cutting device, includes the base and sets up the mounting bracket on the base, the mounting bracket is including the crossbeam that is located the base top and the bracing piece that is located the crossbeam both ends, bracing piece bottom and base fixed connection, first blade, second blade and third blade are installed along the horizontal direction in proper order to the crossbeam below, the second blade be located the crossbeam middle part and with crossbeam fixed connection, first blade, third blade and crossbeam sliding connection, set up an installation with crossbeam length direction parallel and lead to the groove on the crossbeam, install the adjusting part who is used for adjusting first blade and third blade position in the inslot of installation.

Further, the second blade back is provided with the second mounting panel, the second mounting panel is fixed to be set up between base and crossbeam, the first blade back is provided with first mounting panel, the third blade back is provided with the third mounting panel, first mounting panel upper end all with crossbeam sliding connection, third mounting panel, first mounting panel lower extreme all with base sliding connection, be provided with on the base and supply first mounting panel and the gliding first spout of second mounting panel.

Furthermore, a partition board which divides the installation through groove into a first through groove and a second through groove is arranged in the center of the installation through groove, the first through groove is positioned above the first mounting plate, the second through groove is positioned above the third mounting plate, the top of the second mounting plate is fixedly connected with the partition board, the adjusting component comprises a first adjusting rod fixedly connected with the top of the first mounting plate, a first limiting block sleeved on the upper end of the first adjusting rod, a second adjusting rod fixedly connected with the top of the third mounting plate, and a second limiting block sleeved on the upper end of the second adjusting rod, the first limiting block, the first adjusting rod, the second limiting block and the second adjusting rod are in sliding connection, a plurality of first limiting grooves for the first limiting block to be clamped in are uniformly distributed on the side wall of the first through groove, a plurality of second limiting grooves for the second limiting block to be clamped in are uniformly distributed on the side wall of the second through, the second limiting groove and the first limiting groove are located at the top of the cross beam.

Furthermore, the cross sections of the first adjusting rod and the second adjusting rod are both polygonal, and polygonal holes for the first adjusting rod and the first adjusting rod to pass through are respectively formed in the centers of the first limiting block and the second limiting block.

Furthermore, the second mounting plate is fixed on the side wall of the mounting through groove close to one side of the blade, the center of the mounting through groove is provided with a first gear and a second gear, the first gear is fixedly connected with a rotating shaft which drives the first gear to rotate, one end of the rotating shaft is fixedly connected with the side wall of the mounting through groove, the other end of the rotating shaft extends to the outer side of the cross beam, a first rack which is meshed with the first gear is arranged above the first gear, the bottom of the first rack is fixedly connected with the second mounting plate, the second gear is fixedly connected with a mounting shaft, the mounting shaft is rotatably connected with two side walls of the mounting through groove, a second rack which is meshed with the second gear is arranged below the second gear, the bottom of the second rack is fixedly connected with a third mounting plate, and one side wall of the mounting through groove is provided with a second chute which is positioned above the first gear, be provided with the third spout that is located the second gear below on another lateral wall of mounting groove, first rack one side is provided with the first slider with second spout matched with, the second rack is provided with the second slider with third spout matched with, the width of second rack is less than the width that the groove was led to in the installation, first slider one side is kept away from to first rack is provided with the head rod, the head rod passes gap and first mounting panel fixed connection between second rack and the logical groove lateral wall of installation, second rack bottom is provided with the second connecting rod, the second connecting rod other end and third mounting panel fixed connection.

Furthermore, the side of the beam close to the blade is provided with scale marks.

The utility model has the advantages as follows:

the utility model provides an autologous cartilage cutting device is provided with the second blade of fixing between crossbeam and bottom plate, gliding first blade and third blade between bottom plate and crossbeam, when cutting cartilage, can adjust the position of first blade and second blade according to the thickness that the user needs, make first blade and second blade, distance between second blade and the third blade is unanimous, and accord with user's demand, thereby utilize this cutting device to surely go out the cartilage piece that thickness is completely unanimous, promote the augmentation rhinoplasty effect, and can reduce doctor's operation burden, make the doctor more light, further promoted augmentation rhinoplasty effect.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention, and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.

Fig. 1 is a schematic structural diagram of a first embodiment of a cutting device provided by the present invention;

FIG. 2 is an enlarged view of circle A of FIG. 1;

fig. 3 is a schematic structural view of a second embodiment of the cutting device of the present invention;

FIG. 4 is a schematic structural view of a second embodiment of an adjustment assembly;

reference numerals: 1-base, 2-first blade, 3-second blade, 4-third blade, 5-beam, 6-support rod, 7-installation through groove, 8-partition plate, 9-first adjusting rod, 10-first limiting groove, 11-first limiting block, 12-first mounting plate, 13-second mounting plate, 14-third mounting plate, 15-first gear, 16-second gear, 17-rotating shaft, 18-installation shaft, 19-first rack, 20-second rack, 21-first slider, 22-second slider, 23-first connecting rod, 24-second connecting rod, 25-first sliding groove.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention, as generally described and illustrated in the figures herein, may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the present invention, presented in the accompanying drawings, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the 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 "upper", "lower", "inner", "outer", and the like indicate the position or positional relationship based on the position or positional relationship shown in the drawings, or the position or positional relationship that the products of the present invention are conventionally placed when used, and are only for convenience of description and simplification of the description, but do not indicate or imply that the device or element referred to must have a specific position, 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 merely to distinguish one description from another, and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it should be further noted that, unless explicitly stated or limited otherwise, the terms "disposed" and "in communication" are to be interpreted broadly, e.g., as either fixed or removable communication, or integrally connected; either mechanically or electrically; 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.

Examples

Referring to fig. 1 to 4, the present embodiment provides an autologous cartilage cutting device for augmentation rhinoplasty, which includes a base 1 and a mounting rack disposed on the base 1, wherein the mounting rack includes a cross beam 5 disposed above the base 1 and support rods 6 disposed at two ends of the cross beam 5, the bottoms of the support rods 6 are fixedly connected to the base 1, the tops of the support rods 6 are fixedly connected to the bottoms of the cross beam 5, that is, the support rods 6 are used for supporting the cross beam 5, a first blade 2, a second blade 3 and a third blade 4 are sequentially disposed below the cross beam 5 along a horizontal direction, the second blade 3 is disposed in the middle of the cross beam 5 and fixedly connected to the cross beam 5, the bottom of the second blade 3 is fixedly connected to a bottom plate, the first blade 2 and the third blade 4 are slidably connected to the cross beam 5, and a second mounting plate 13 is disposed on the back of the second blade 3 for better fixing the first blade 2 and the second blade 3, the second mounting plate 13 is fixedly arranged between the base 1 and the cross beam 5, the back of the first blade 2 is provided with a first mounting plate 12, the back of the third blade 4 is provided with a third mounting plate 14, the cutting edges of the first blade 2, the second blade 3 and the third blade 4 are on the same horizontal line, the upper ends of the third mounting plate 14 and the first mounting plate 12 are both in sliding connection with the cross beam 5, the lower ends of the third mounting plate 14 and the first mounting plate 12 are both in sliding connection with the base 1, and the base 1 is provided with a first sliding chute 25 for the sliding of the first mounting plate 12 and the second mounting plate 13, so that the first blade 2 and the second blade 3 cannot deflect during sliding, even if the first blade 2 and the second blade 3 can always keep a vertical state, and the condition that the cut cartilage pieces are not uniform is avoided;

and the crossbeam 5 is provided with an installation through groove 7 parallel to the length direction of the crossbeam 5, the installation through groove 7 penetrates through the top and the bottom of the crossbeam 5, and an adjusting component for adjusting the positions of the first blade 2 and the third blade 4 is installed in the installation through groove 7. There are various embodiments of the adjustment assembly, which are described in detail below.

As a first embodiment of the adjusting assembly, a partition plate 8 is arranged in the center of the installation through slot 7 to divide the installation through slot 7 into a first through slot and a second through slot, wherein the first through slot is located above the first mounting plate 12, the second through slot is located above the third mounting plate 14, the top of the second mounting plate 13 is fixedly connected with the partition plate 8, namely, the top of the second mounting plate 13 is fixed on the partition plate 8, and the first blade 2 and the third blade 4 move on two sides of the second blade 3 to adjust the distance between the first blade 2 and the second blade 3, and between the second blade 3 and the third blade 4; the adjusting component comprises a first adjusting rod 9 fixedly connected with the top of a first mounting plate 12, a first limiting block 11 sleeved on the upper end of the first adjusting rod 9, a second adjusting rod fixedly connected with the top of a third mounting plate 14, and a second limiting block sleeved on the upper end of the second adjusting rod, wherein the first limiting block 11, the first adjusting rod 9 and the second limiting block are connected in a sliding manner, namely the first limiting block 11 can slide up and down on the first adjusting rod 9, the second limiting block can slide up and down on the second adjusting rod, a plurality of first limiting grooves 10 for the first limiting block 11 to be clamped in are uniformly distributed on the side wall of the first through groove, namely the first limiting grooves 10 are uniformly distributed on two side walls of the first through groove, a plurality of second limiting grooves for the second limiting block to be clamped in are uniformly distributed on the side wall of the second through groove, namely the second limiting grooves are uniformly distributed on two side walls of the second through groove, and the first limiting grooves 10 are positioned on the top of the cross beam 5, namely, the first limiting block 11 and the second limiting block are located above the beam 5, the width of the first limiting block 11 is greater than the width of the first through groove, the width of the second limiting block is greater than the width of the second through groove, and the first limiting block 11 and the second limiting block can be respectively clamped in the first limiting groove 10 and the second limiting groove, when the position of the first blade 2 needs to be adjusted, the first limiting block 11 is pulled up along the first adjusting rod 9, so that the first limiting rod can slide along the first through groove, after the first blade 2 is adjusted to a proper position, the first limiting block 11 is released, so that the first limiting block 11 is clamped in the corresponding first positioning groove, thereby limiting the position of the first adjusting rod 9, namely limiting the position of the first blade 2, so that the distance between the first blade 2 and the second blade 3 is fixed, the third blade 4 is also adjusted in the same way, wherein in order to prevent the first limiting block 11 and the second limiting block from rotating in the using process, lead to first stopper 11 or second stopper to slide to crossbeam 5 below from installing logical groove 7 and lose spacing effect, can all set up the cross-section of first regulation pole 9 and second regulation pole into the polygon, first regulation pole 9 is the triangular prism with the second regulation pole promptly, the quadrangular such as quadrangular, the quadrangular is prismatic, pentagonal prism, first stopper 11 and second stopper central authorities have seted up respectively and have supplied first regulation pole 9, the polygonal hole that first regulation pole 9 passes through, thereby make first stopper 11 and second stopper can only be along first regulation pole 9, the second is adjusted the pole and is carried out reciprocating motion, and can not take place to rotate.

As a second embodiment of the adjusting assembly, the second mounting plate 13 is fixed on the side wall of the mounting through slot 7 near the blade, the center of the mounting through slot 7 is provided with a first gear 15 and a second gear 16, the first gear 15 is fixedly connected with a rotating shaft 17 for driving the first gear 15 to rotate, one end of the rotating shaft 17 is fixedly connected with the side wall of the mounting through slot 7, the other end extends to the outside of the cross beam 5, i.e. the rotating shaft 17 is parallel to the width direction of the cross beam 5, the rotating shaft 17 is held to extend out of one end of the outside of the cross beam 5 to rotate so as to drive the first gear 15 to rotate, for rotation convenience, a rotating handle can be arranged on one side of the rotating shaft 17, a first rack 19 meshed with the first gear 15 is arranged above the first gear 15, the bottom of the first rack 19 is fixedly connected with the second mounting plate 13, the second gear 16 is fixedly connected with a mounting, in order to facilitate installation, corresponding through holes can be formed in two sides of the cross beam 5 so that two ends of the mounting shaft 18 respectively penetrate through the through holes, threads are arranged at two ends of the mounting shaft 18, nuts are sleeved on two sides of the mounting shaft 18 penetrating through the cross beam 5 to limit the mounting shaft 18 without affecting the rotation of the mounting shaft 18, a second rack 20 meshed with the second gear 16 is arranged below the second gear 16, the bottom of the second rack 20 is fixedly connected with a third mounting plate 14, a second sliding groove located above the first gear 15 is arranged on one side wall of the mounting through groove 7, a third sliding groove located below the second gear 16 is arranged on the other side wall of the mounting groove, a first sliding block 21 matched with the second sliding groove is arranged on one side of the first rack 19, a second sliding block 22 matched with the third sliding groove is arranged on the second rack 20, and in order to enable the cutting edges of the first blade 2, the third blade 4 and the second blade 3 to be located on the same horizontal line, a first connecting rod 23 can be arranged on the top of the first mounting plate 12, the first connecting rod 23 is L-shaped, the first connecting rod 23 bypasses the side wall of the through groove 7 of the mounting through groove near the first blade 2 and is fixedly connected with the bottom of the first rack 19, a second connecting rod 24 is arranged on the third mounting plate 14, the second connecting rod 24 is L-shaped, the second connecting rod 24 bypasses the side wall of the through groove 7 of the mounting through groove near the third blade 4 and is fixedly connected with the bottom of the second rack 20, because the first rack 19 is above the first rack 19, the width of the second rack 20 is required to be smaller than that of the mounting through groove 7 to ensure that the first connecting rod 23 can be connected with the first rack 19 and move without being influenced by the second rack 20, namely, when the mounting through groove 7 leans against the side wall of the mounting through groove 7 at the third through groove, a gap for the first connecting rod 23 to pass through is reserved between the mounting through groove 7 and the other side wall, since the moving positions of the first blade 2 and the second blade 3 are not crossed, the first connecting rod 23 and the second connecting rod 24 are not contacted, and in order to make the positions of the first blade 2 and the third blade 4 be adjusted more comprehensively, a part of the first rack 19 can be extended to the side of the first gear 15 close to the second gear 16, a part of the second rack 20 is extended to the side of the second gear 16 close to the first gear 15, the lengths of the first rack 19 and the second rack 20 are both shorter than that of the cross beam 5, and when the first gear 15 is rotated, the first blade 2 can be slid on the side of the second blade 3, the sliding distance is basically equivalent to the distance of the installation through groove 7 on the side of the second blade 3 close to the first blade 2, and the moving distance of the third blade 4 is also identical. When the device is used, if the distance between the blades, namely the thickness of the cartilage pieces, needs to be adjusted, the rotating shaft 17 can be held to drive the first gear 15 to rotate, and the first gear 15 can drive the second gear 16 to rotate, so that the first blade 2 and the third blade 4 are close to or far away from the second blade 3 at the same time, the synchronous adjustment of the distance between the first blade 2 and the second blade 3, and the distance between the second blade 3 and the third blade 4 are realized, and the thickness of the cartilage after being sliced is more uniform; in addition, in order to facilitate the installation of the adjusting assembly, one end of the installation through groove 7 can penetrate through the end of the cross beam 5, that is, the installation through groove 7 is arranged at an opening of one end of the cross beam 5, so that the components in the installation through groove 77 can enter more conveniently, meanwhile, the second sliding groove and the first sliding groove 25 can also extend to the opening end, when the first rack 19 and the second rack 20 are installed, the first sliding block 21 and the second sliding block are directly inserted into the first sliding groove 25 and the second sliding groove from the opening end, so that the installation is more convenient, in order to limit the positions of the first sliding block 21 and the second sliding block 22, an inserting block can be arranged, after the adjusting assembly is installed, the inserting block is inserted into the opening of the end of the cross beam 5 from the upper part to be closed, a boss is arranged at the bottom of the cross beam 5 at the opening part for placing the inserting block, and a slot in the vertical direction is, the vertical fixture block is arranged on the insert block to further limit the position of the insert block, so that the insert block can only be inserted and taken out from the upper part.

In addition, in order to more intuitively see the distance between the first blade 2 and the second blade 3 and the distance between the second blade 3 and the third blade 4, a scale mark can be arranged on one side of the cross beam 5 close to the blades, so that the position adjustment of the first blade 2 and the third blade 4 is more accurate, and the thickness of the cut cartilage sheets is more uniform and regular.

The above description is only for the preferred embodiment of the present invention, and the present invention is not limited thereto, the protection scope of the present invention is defined by the claims, and all structural changes equivalent to the contents of the description and drawings of the present invention should be included in the protection scope of the present invention.

Claims (6)

1. An autologous cartilage cutting device for augmentation rhinoplasty is characterized by comprising a base (1) and a mounting rack arranged on the base (1), the mounting rack comprises a cross beam (5) positioned above the base (1) and supporting rods (6) positioned at two ends of the cross beam (5), the bottom of the supporting rod (6) is fixedly connected with the base (1), a first blade (2), a second blade (3) and a third blade (4) are sequentially arranged below the cross beam (5) along the horizontal direction, the second blade (3) is positioned in the middle of the cross beam (5) and is fixedly connected with the cross beam (5), the first blade (2) and the third blade (4) are connected with the beam (5) in a sliding way, the cross beam (5) is provided with an installation through groove (7) parallel to the length direction of the cross beam (5), and an adjusting component for adjusting the positions of the first blade (2) and the third blade (4) is arranged in the mounting through groove (7).

2. The autologous cartilage cutting device for augmentation rhinoplasty according to claim 1, wherein a second mounting plate (13) is arranged on the back surface of the second blade (3), the second mounting plate (13) is fixedly arranged between the base (1) and the cross beam (5), a first mounting plate (12) is arranged on the back surface of the first blade (2), a third mounting plate (14) is arranged on the back surface of the third blade (4), the upper ends of the third mounting plate (14) and the first mounting plate (12) are both in sliding connection with the cross beam (5), the lower ends of the third mounting plate (14) and the first mounting plate (12) are both in sliding connection with the base (1), and a first sliding groove (25) for the first mounting plate (12) and the second mounting plate (13) to slide is arranged on the base (1).

3. The autologous cartilage cutting device for augmentation rhinoplasty according to claim 2, wherein a partition plate (8) dividing the installation through groove (7) into a first through groove and a second through groove is arranged in the center of the installation through groove (7), the first through groove is positioned above the first mounting plate (12), the second through groove is positioned above the third mounting plate (14), the top of the second mounting plate (13) is fixedly connected with the partition plate (8), the adjusting assembly comprises a first adjusting rod (9) fixedly connected with the top of the first mounting plate (12), a first limiting block (11) sleeved on the upper end of the first adjusting rod (9), a second adjusting rod fixedly connected with the top of the third mounting plate (14), and a second limiting block sleeved on the upper end of the second adjusting rod, wherein the first limiting block (11) is connected with the first adjusting rod (9), and the second limiting block is connected with the second adjusting rod in a sliding manner, the utility model discloses a beam, including first logical groove, second logical groove, crossbeam (5), the equipartition has a plurality of first spacing grooves (10) that supply first stopper (11) card to go into on the lateral wall in first logical groove, the equipartition has a plurality of second spacing grooves that supply second stopper card to go into on the lateral wall in second logical groove, second spacing groove and first spacing groove (10) are located crossbeam (5) top.

4. The autologous cartilage cutting device for the augmentation rhinoplasty according to claim 3, wherein the cross sections of the first adjusting rod (9) and the second adjusting rod are both polygonal, and polygonal holes for the first adjusting rod (9) and the first adjusting rod (9) to pass through are respectively formed in the centers of the first limiting block (11) and the second limiting block.

5. The autologous cartilage cutting device for augmentation rhinoplasty according to claim 2, wherein the second mounting plate (13) is fixed on the side wall of the mounting through groove (7) near one side of the blade, the center of the mounting through groove (7) is provided with a first gear (15) and a second gear, the first gear (15) is fixedly connected with a rotating shaft (17) which drives the first gear (15) to rotate, one end of the rotating shaft (17) is fixedly connected with the side wall of the mounting through groove (7), the other end of the rotating shaft extends to the outer side of the cross beam (5), a first rack (19) which is meshed with the first gear (15) is arranged above the first gear (15), the bottom of the first rack (19) is fixedly connected with the second mounting plate (13), the second gear (16) is fixedly connected with a mounting shaft (18), and the mounting shaft (18) is rotatably connected with the two side walls of the mounting through groove (7), second gear (16) below is provided with one and second gear (16) engaged second rack (20), second rack (20) bottom and third mounting panel (14) fixed connection, be provided with the second spout that is located first gear (15) top on the lateral wall that the groove (7) was led to in the installation, be provided with the third spout that is located second gear (16) below on another lateral wall that the groove (7) was led to in the installation, first rack (19) one side is provided with first slider (21) with second spout matched with, second rack (20) one side is provided with second slider (22) with third spout matched with, the width of second rack (20) is less than the width that the groove (7) was led to in the installation, first rack (19) is kept away from first slider (21) one side and is provided with head rod (23), head rod (23) pass second rack (20) and the gap and the first mounting panel between the groove (7) lateral wall are led to in the installation, head rod (23) pass second rack (20) and the installation (12) The rack is fixedly connected, a second connecting rod (24) is arranged at the bottom of the second rack (20), and the other end of the second connecting rod (24) is fixedly connected with the third mounting plate (14).

6. The autologous cartilage cutting device for augmentation rhinoplasty according to any one of claims 1-5, characterized in that the side of the beam (5) close to the first blade (2) is provided with graduation marks.

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