CN212729905U

CN212729905U - Bone saw is cut to jaw overlength curve down

Info

Publication number: CN212729905U
Application number: CN202020811804.0U
Authority: CN
Inventors: 卢丙仑
Original assignee: Individual
Current assignee: Individual
Priority date: 2020-05-15
Filing date: 2020-05-15
Publication date: 2021-03-19
Anticipated expiration: 2030-05-15

Abstract

The utility model relates to a medical apparatus, concretely relates to bone saw is cut to jaw overlength curve down. The gear-type saw blade cutter comprises a shell, wherein a power input shaft, an eccentric wheel shaft, a swing rod and an output shaft are sequentially arranged in the shell from back to front through bearings and connected with each other; the output shaft is hollow at the end part of one end connected with the cutter body, an opening is formed in the side edge, the cutter handle is inserted into the end part of the output shaft, and the strip-shaped convex ribs are clamped in the opening; the locking sleeve is arranged to be connected with the end part of the output shaft through threads, and the opening is tightened through screwing. The utility model discloses the installation of the cutter body of being convenient for to the cutter body installation is stable, keep firm, does benefit to the operation precision.

Description

Bone saw is cut to jaw overlength curve down

Technical Field

The utility model relates to a medical apparatus, concretely relates to bone saw is cut to jaw overlength curve down.

Background

In the craniomaxillofacial surgery professional medical face contour operation, such as the maxilla overlength curve osteotomy, when the operation is carried out, the osteotomy swing saw is adopted to carry out full-thickness osteotomy according to the mark made in advance after the correct design is confirmed by hand touch or a mouth mirror. When cutting bone, the swing saw handle should be held stably, the swing saw should be vibrated at high rotation speed, and the bone cutting is performed from back to front, so as to prevent the bone cutting line from rising towards the condyloid process of the mandible and prevent the wrist of the operator from being stiff, and the curve can be molded more softly. Therefore, the precision of the swing saw is particularly important in long-curve osteotomy, the existing swing saw drives the swing rod to swing by utilizing the eccentric shaft, so that the cutter body is driven by the output shaft to do reciprocating swing motion to realize osteotomy, the cutter body is generally connected with the output shaft in a mode of screwing the cutter body through threads, but the cutter body vibrates in high frequency in the operation, and the cutter head can gradually loosen in the connection mode, so that the operation precision and the operation safety are greatly influenced.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a mandible overlength curve cuts bone saw to solve the inconvenient connection of tool bit of current cut bone pendulum saw and connect stable problem.

In order to achieve the above object, the utility model provides a following technical scheme:

a mandible overlong curve osteotome saw comprises a shell, wherein a power input shaft, an eccentric wheel shaft, a swing rod and an output shaft are sequentially arranged in the shell from back to front through a bearing and connected with the power input shaft, the eccentric wheel shaft is meshed with the power input shaft through a gear, an eccentric shaft is arranged on the eccentric wheel shaft and connected with one end of the swing rod, the other end of the swing rod is connected with one end of the output shaft, the other end of the output shaft is connected with a cutter body, the cutter body comprises a cutter handle and a saw blade arranged at one end of the cutter handle, and strip-shaped convex edges are arranged; the output shaft is hollow at the end part of one end connected with the cutter body, an opening is formed in the side edge, the cutter handle is inserted into the end part of the output shaft, and the strip-shaped convex ribs are clamped in the opening; the locking sleeve is arranged to be connected with the end part of the output shaft through threads, and the opening is tightened through screwing.

The power input shaft is connected with external power, continuously rotates under the action of the external power, and drives the eccentric wheel shaft to rotate through the gear, so that the eccentric shaft on the eccentric wheel shaft drives the swing rod to reciprocate at a certain angle, further drives the output shaft to reciprocate at a certain angle, and further drives the cutter body to swing, and therefore bone cutting is achieved. When the cutter body is installed, the end part of the output shaft is inserted into the cutter handle, and the locking sleeve is screwed tightly, so that the operation is convenient and fast, and the limitation is realized because the strip-shaped convex ribs are clamped in the openings, the cutter body is prevented from rotating relative to the output shaft during operation, the connection is more stable and stable, and the operation precision is improved.

Preferably, an included angle exists between the saw blade and the knife handle, the included angle is 115-116 degrees, and the practical operation of the operation is facilitated.

Preferably, the saw blade is in a fan shape, and the knife edge of the saw blade is in an arc shape, so that the possibility of damage to surrounding soft tissues is reduced, and the bone cutting precision can be improved.

Preferably, the surface of the inner wall of the shell is embedded with glass fiber silencing rings which are sequentially arranged from back to front in the shell. The glass fiber silencing ring has the function of absorbing noise energy generated when each part of the shell moves at high frequency, so that the noise is reduced, the vibration of the shell is reduced, and the operation precision is improved.

Preferably, the surface of the inner wall of the shell is provided with a heat-conducting graphite strip extending from the inside of the shell to the end face of the rear end of the shell. The heat conduction graphite strip can conduct the heat in the shell to the end face of the rear end of the shell quickly so as to be discharged. On one hand, the holding feeling of an operator is facilitated, and on the other hand, the heat is timely transmitted out, so that the service life of each component in the shell is prolonged.

Preferably, the locking sleeve is provided with a sheath extending towards the front end of the locking sleeve. The sheath can avoid soft tissue injury caused by the soft tissue entering the clearance between the locking sleeve and the knife handle in the operation.

Compared with the prior art, the utility model discloses can produce following beneficial effect at least: the utility model is convenient for the installation of the knife body, and the knife body is stably installed and stably kept, thus being beneficial to the precision of the operation; the utility model is convenient for the actual operation of the operation; the utility model discloses can avoid soft tissue to get into the clearance between lock sleeve and the handle of a knife in the art and cause the soft tissue damage.

Drawings

Fig. 1 is a schematic structural diagram of the present invention.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

Fig. 1 shows the structure of the overlength curve osteotomy saw for mandible, and several embodiments are listed below with reference to the figure.

Example 1:

a mandible overlong curve bone cutting saw comprises a shell 1, wherein a power input shaft 2, an eccentric wheel shaft 3, a swing rod 4 and an output shaft 5 are sequentially arranged in the shell 1 from back to front through bearings and connected with each other, the power input shaft 2 is meshed with the eccentric wheel shaft 3 through a gear 6, an eccentric shaft 3-1 is arranged on the eccentric wheel shaft 3 and connected with one end of the swing rod 4, the swing rod 4 consists of two tangent circular rings, the other end of the swing rod 4 is connected with one end of the output shaft 5, the other end of the output shaft 5 is connected with a cutter body 7, the cutter body 7 comprises a cutter handle 7-1 and a saw blade 7-2 arranged at one end of the cutter handle 7-1, the saw blade 7-2 is fan-shaped, the length is 1.2 cm, the cutter opening of the saw blade 7-2 is arc-shaped, the width is 5 mm, and an included angle exists between the saw, the angle is 116 °. The knife handle 7-1 is provided with a strip-shaped convex rib 7-3; the output shaft 5 is hollow at one end connected with the cutter body 7, an opening 8 is formed in the side edge, the cutter handle 7-1 is inserted into the end of the output shaft 5, and the strip-shaped convex edge 7-3 is clamped in the opening 8; the locking sleeve 9 is connected with the end part of the output shaft 5 through threads, and the opening 8 is tightened through screwing.

The power input shaft 2 is connected with external power through a linear interface, continuously rotates under the action of the external power, and drives the eccentric wheel shaft 3 to rotate through the gear 6, so that the eccentric shaft 3-1 on the eccentric wheel shaft 3 drives the swing rod 4 to reciprocate at a certain angle, further drives the output shaft 5 to reciprocate at a certain angle, and further drives the cutter body 7 to swing, and therefore bone cutting is achieved. When the knife body 7 is installed, the knife handle 7-1 is inserted into the end portion of the output shaft 5, and then the locking sleeve 9 is screwed tightly, so that the knife is convenient and rapid to use, and the bar-shaped convex edges 7-3 are clamped in the opening 8, so that the limiting is realized, the knife body 7 is prevented from rotating relative to the output shaft 5 when in work, the connection is more stable and stable, and the operation precision is improved.

Example 2:

the utility model provides a mandible overlength curve cuts bone saw, includes casing 1, by back to preceding in the casing 1, loop through power input shaft 2, eccentric wheel axle 3, pendulum rod 4, output shaft 5 that the bearing set up and be connected in proper order, casing 1 inner wall surface has inlayed glass fiber noise elimination ring 10, glass fiber noise elimination ring 10 is by arranging in proper order after to before in casing 1. The power input shaft 2 is meshed with the eccentric wheel shaft 3 through the gear 6, the eccentric shaft 3-1 arranged on the eccentric wheel shaft 3 is connected with one end of the swing rod 4, the swing rod 4 is composed of two tangent circular rings, the other end of the swing rod 4 is connected with one end of the output shaft 5, the other end of the output shaft 5 is connected with the cutter body 7, the cutter body 7 comprises a cutter handle 7-1 and a saw blade 7-2 arranged at one end of the cutter handle 7-1, the saw blade 7-2 is fan-shaped, the length is 1.2 cm, the cutter opening of the saw blade 7-2 is arc-shaped, the width is 5 mm, and an included angle is formed between the saw blade 7-2 and the cutter handle 7-1 and is. The knife handle 7-1 is provided with a strip-shaped convex rib 7-3; the output shaft 5 is hollow at one end connected with the cutter body 7, an opening 8 is formed in the side edge, the cutter handle 7-1 is inserted into the end of the output shaft 5, and the strip-shaped convex edge 7-3 is clamped in the opening 8; the locking sleeve 9 is connected with the end part of the output shaft 5 through threads, and the opening 8 is tightened through screwing.

The power input shaft 2 is connected with external power through a linear interface, continuously rotates under the action of the external power, and drives the eccentric wheel shaft 3 to rotate through the gear 6, so that the eccentric shaft 3-1 on the eccentric wheel shaft 3 drives the swing rod 4 to reciprocate at a certain angle, further drives the output shaft 5 to reciprocate at a certain angle, and further drives the cutter body 7 to swing, and therefore bone cutting is achieved. When the knife body 7 is installed, the knife handle 7-1 is inserted into the end portion of the output shaft 5, and then the locking sleeve 9 is screwed tightly, so that the knife is convenient and rapid to use, and the bar-shaped convex edges 7-3 are clamped in the opening 8, so that the limiting is realized, the knife body 7 is prevented from rotating relative to the output shaft 5 when in work, the connection is more stable and stable, and the operation precision is improved. And the glass fiber silencing ring 10 plays a role in absorbing noise energy generated when each part of the shell 1 moves at high frequency, so that the noise is reduced, the vibration of the shell 1 is reduced, and the operation precision is improved.

Example 3:

the utility model provides a mandible overlength curve cuts bone saw, includes casing 1, by back to preceding in the casing 1, loop through power input shaft 2, eccentric wheel axle 3, pendulum rod 4, output shaft 5 that the bearing set up and be connected in proper order, casing 1 inner wall surface has inlayed glass fiber noise elimination ring 10, glass fiber noise elimination ring 10 is by arranging in proper order after to before in casing 1. The surface of the inner wall of the shell 1 is also provided with a heat conducting graphite strip 11 extending from the inside of the shell 1 to the end face of the rear end of the shell 1. The power input shaft 2 is meshed with the eccentric wheel shaft 3 through the gear 6, the eccentric shaft 3-1 arranged on the eccentric wheel shaft 3 is connected with one end of the swing rod 4, the swing rod 4 is composed of two tangent circular rings, the other end of the swing rod 4 is connected with one end of the output shaft 5, the other end of the output shaft 5 is connected with the cutter body 7, the cutter body 7 comprises a cutter handle 7-1 and a saw blade 7-2 arranged at one end of the cutter handle 7-1, the saw blade 7-2 is fan-shaped, the length is 1.2 cm, the cutter opening of the saw blade 7-2 is arc-shaped, the width is 5 mm, and an included angle is formed between the saw blade 7-2 and the cutter handle 7-1 and is. The knife handle 7-1 is provided with a strip-shaped convex rib 7-3; the output shaft 5 is hollow at one end connected with the cutter body 7, an opening 8 is formed in the side edge, the cutter handle 7-1 is inserted into the end of the output shaft 5, and the strip-shaped convex edge 7-3 is clamped in the opening 8; the locking sleeve 9 is connected with the end part of the output shaft 5 through threads, and the opening 8 is tightened through screwing.

The most preferred embodiment is as follows:

the utility model provides a mandible overlength curve cuts bone saw, includes casing 1, by back to preceding in the casing 1, loop through power input shaft 2, eccentric wheel axle 3, pendulum rod 4, output shaft 5 that the bearing set up and be connected in proper order, casing 1 inner wall surface has inlayed glass fiber noise elimination ring 10, glass fiber noise elimination ring 10 is by arranging in proper order after to before in casing 1. The surface of the inner wall of the shell 1 is also provided with a heat conducting graphite strip 11 extending from the inside of the shell 1 to the end face of the rear end of the shell 1. The power input shaft 2 is meshed with the eccentric wheel shaft 3 through the gear 6, the eccentric shaft 3-1 arranged on the eccentric wheel shaft 3 is connected with one end of the swing rod 4, the swing rod 4 is composed of two tangent circular rings, the other end of the swing rod 4 is connected with one end of the output shaft 5, the other end of the output shaft 5 is connected with the cutter body 7, the cutter body 7 comprises a cutter handle 7-1 and a saw blade 7-2 arranged at one end of the cutter handle 7-1, the saw blade 7-2 is fan-shaped, the length is 1.2 cm, the cutter opening of the saw blade 7-2 is arc-shaped, the width is 5 mm, and an included angle is formed between the saw blade 7-2 and the cutter handle 7-1 and is. The knife handle 7-1 is provided with a strip-shaped convex rib 7-3; the output shaft 5 is hollow at one end connected with the cutter body 7, an opening 8 is formed in the side edge, the cutter handle 7-1 is inserted into the end of the output shaft 5, and the strip-shaped convex edge 7-3 is clamped in the opening 8; the locking sleeve 9 is connected with the end part of the output shaft 5 through threads, and the opening 8 is tightened through screwing. The locking sleeve 9 is provided with a sheath 12 extending towards the front end of the locking sleeve 9, so that soft tissue can be prevented from entering a gap between the locking sleeve 9 and the knife handle 7-1 to cause soft tissue injury in an operation.

Reference throughout this specification to multiple illustrative embodiments means that a particular structure described in connection with the embodiments is included in at least one embodiment described generally throughout this application. The appearances of the same phrase in various places in the specification are not necessarily all referring to the same embodiment. Further, while a structure has been described in connection with any one embodiment, it is to be understood that it is within the scope of the invention to implement such structure in connection with other embodiments.

Claims

1. The utility model provides a mandible overlength curve osteotomy saw, includes casing (1), by back to preceding in casing (1), loop through power input shaft (2), eccentric shaft (3), pendulum rod (4), output shaft (5) that set up and connect through the bearing, power input shaft (2) and eccentric shaft (3) pass through gear (6) meshing, be provided with eccentric shaft (3-1) on eccentric shaft (3) and be connected with pendulum rod (4) one end, the pendulum rod (4) other end is connected with the one end of output shaft (5), the output shaft (5) other end is connected with cutter body (7), its characterized in that: the cutter body (7) comprises a cutter handle (7-1) and a saw blade (7-2) arranged at one end of the cutter handle (7-1), and strip-shaped convex ribs (7-3) are arranged on the cutter handle (7-1); the output shaft (5) is hollow at one end part connected with the cutter body (7), an opening (8) is formed in the side edge, the cutter handle (7-1) is inserted into the end part of the output shaft (5), and the strip-shaped convex edge (7-3) is clamped in the opening (8); the locking sleeve (9) is arranged to be in threaded connection with the end part of the output shaft (5), and the opening (8) is tightened by screwing.

2. The mandibular overlong curve osteotomy saw of claim 1, wherein: an included angle is formed between the saw blade (7-2) and the cutter handle (7-1), and the included angle is 115-116 degrees.

3. The mandibular overlong curve osteotomy saw of claim 1, wherein: the saw blade (7-2) is fan-shaped, and the knife edge of the saw blade (7-2) is arc-shaped.

4. The mandibular overlong curve osteotomy saw of claim 1, wherein: the surface of the inner wall of the shell (1) is embedded with a glass fiber silencing ring (10), and the glass fiber silencing ring (10) is sequentially arranged from back to front in the shell (1).

5. The mandibular overlong curve osteotomy saw of claim 1, wherein: the heat-conducting graphite strip (11) extending from the inner wall surface of the shell (1) to the rear end face of the shell (1) is arranged on the inner wall surface of the shell (1).

6. The mandibular overlong curve osteotomy saw of claim 1, wherein: the locking sleeve (9) is provided with a sheath (12) extending to the front end of the locking sleeve (9).