阅读说明：本技术 一种手柄结构及牙科手术器械 (Handle structure and dental surgical instrument ) 是由 张本琴 张威振 徐佳兵 冼星志 何华俊 黄永朝 吴坤优 于 2021-02-01 设计创作，主要内容包括：本发明的实施例提供了一种手柄结构及牙科手术器械,涉及医疗器械技术领域。本发明的实施例提供的手柄结构包括驱动件、夹针轴芯以及至少两个夹紧销。驱动件与夹针轴芯传动连接,且夹针轴芯上具有用于与头部结构的传动长轴插接的容纳孔,夹针轴芯在驱动件的驱动下转动时带动传动长轴转动,进而实现驱动件与传动长轴之间的动力传递。至少两个夹紧销沿夹针轴芯的周向分布,且夹针轴芯上设置有与容纳孔连通的至少两个卡槽,至少两个夹紧销一一对应设置在至少两个卡槽内,以通过至少两个夹紧销将传动长轴夹紧,使得夹针轴芯与传动长轴之间的连接更加稳定可靠,夹针轴芯与传动长轴之间的动力传递更加稳定,有助于保证头部结构的工作效果。(The embodiment of the invention provides a handle structure and a dental surgical instrument, and relates to the technical field of medical instruments. Embodiments of the present invention provide a handle structure that includes a drive member, a gripper hub, and at least two gripper pins. The driving piece is connected with the needle clamping shaft core in a transmission mode, the needle clamping shaft core is provided with a containing hole used for being connected with a transmission long shaft of the head structure in an inserting mode, the needle clamping shaft core drives the transmission long shaft to rotate when driven by the driving piece to rotate, and therefore power transmission between the driving piece and the transmission long shaft is achieved. At least two clamping pins are distributed along the circumferential direction of the needle clamping shaft core, at least two clamping grooves communicated with the accommodating hole are formed in the needle clamping shaft core, the at least two clamping pins are arranged in the at least two clamping grooves in a one-to-one correspondence mode, the transmission long shaft is clamped through the at least two clamping pins, connection between the needle clamping shaft core and the transmission long shaft is more stable and reliable, power transmission between the needle clamping shaft core and the transmission long shaft is more stable, and the work effect of the head structure is guaranteed.)

1. A handle structure for connection with a head structure (200) of a dental surgical instrument (10), characterized in that the handle structure (100) comprises:

a drive member (112);

the needle clamping shaft core (135) is in transmission connection with the driving piece (112), the needle clamping shaft core (135) is provided with a containing hole, and the containing hole is used for being plugged with a transmission long shaft (212) of the head structure (200) so as to drive the transmission long shaft (212) to rotate under the condition that the needle clamping shaft core (135) rotates; and

the clamping pin comprises at least two clamping pins (136) arranged along the circumferential direction of the clamping pin shaft core (135), at least two clamping grooves (1352) communicated with the accommodating hole are arranged on the clamping pin shaft core (135), the at least two clamping pins (136) are arranged in the at least two clamping grooves (1352) in a one-to-one correspondence mode, and the at least two clamping pins (136) are used for clamping the transmission long shaft (212).

2. The handle structure according to claim 1, wherein the clamping groove (1352) penetrates through the needle clamping shaft core (135), the handle structure (100) further comprises a spring (137) sleeved on the needle clamping shaft core (135), and the spring (137) is used for applying a force to the clamping pin (136) and pointing to the axial center of the accommodating hole under the condition that the transmission long shaft (212) applies a force to the clamping pin (136) in a radial direction outwards.

3. The handle structure of claim 2, wherein the handle structure (100) further comprises a limit nut (141), the limit nut (141) being in threaded engagement with the needle clamping mandrel (135); the periphery of the needle clamping shaft core (135) is provided with a limiting step (1353), two ends of the spring (137) are respectively abutted against the limiting nut (141) and the limiting step (1353), and along the axial direction of the needle clamping shaft core (135), the limiting step (1353) and the limiting nut (141) are respectively positioned on two sides of the clamping groove (1352).

4. The handle structure according to claim 1, wherein the handle structure (100) further comprises a bender connector (131), a first bearing (133) and a second bearing (134), the bender connector (131) covers the needle clamping shaft core (135), the first bearing (133) and the second bearing (134) are respectively sleeved at two axial ends of the needle clamping shaft core (135), and the first bearing (133) and the second bearing (134) are respectively supported between the bender connector (131) and the needle clamping shaft core (135).

5. The handle structure according to claim 4, wherein the handle structure (100) further comprises a bearing tightening nut (143) and a motor connector (118), the bearing tightening nut (143) interfering with the second bearing (134) to apply a pre-load to the second bearing (134); the bearing jacking nut (143) is positioned in the bending machine connector (131), and the bearing jacking nut (143) is in threaded connection with the bending machine connector (131); one end of the motor connecting piece (118) is in threaded connection with the driving piece (112), the inner circumferential surface of the bearing jacking nut (143) is matched with the outer circumferential surface of one end, far away from the driving piece (112), of the motor connecting piece (118), so that the bearing jacking nut (143), the bending machine connector (131), the motor connecting piece (118) and the needle clamping shaft core (135) are coaxially arranged.

6. The handle structure according to claim 5, wherein the handle structure (100) further comprises a protective sleeve (132), the bender connector (131) is fixedly connected to the protective sleeve (132), and the protective sleeve (132) is sleeved on the driving member (112).

7. The handle structure according to claim 6, wherein the handle structure (100) further comprises a handle housing (111), the driving member (112) being disposed within the handle housing (111); be provided with buckle spare (121) on handle casing (111) outer wall, be provided with snap ring (138) in protective sleeve (132), protective sleeve (132) cover is established handle casing (111), just buckle spare (121) with snap ring (138) joint, so that protective sleeve (132) with handle casing (111) detachably connects.

8. The handle structure according to any one of claims 1 to 7, wherein the handle structure (100) further comprises a coupling (119) fixedly connected to the output shaft of the driving member (112), and the end of the needle clamping shaft core (135) close to the driving member (112) is provided with a guide bevel (1354), and the guide bevel (1354) is used for guiding the matching of the needle clamping shaft core (135) and the coupling (119).

9. A dental surgical instrument, characterized in that the dental surgical instrument (10) comprises a head structure (200) and the handle structure (100) according to any one of claims 1 to 8, a drive shaft (212) of the head structure (200) is inserted into a receiving hole of the clamp shaft core (135), and the at least two clamping pins (136) are wound around the drive shaft (212) to clamp the drive shaft (212) relative to the clamp shaft core (135).

10. A dental surgical instrument as claimed in claim 9, characterized in that the dental surgical instrument (10) further comprises a charging base (300), the handle structure (100) further comprising a charging battery (113) electrically connected with the drive member (112); the charging base (300) is used for charging the rechargeable battery (113).

11. Dental surgical instrument according to claim 9, wherein the dental surgical instrument (10) further comprises a foot structure (400), the foot structure (400) being in communication with the drive member (112) for controlling the drive member (112) via the foot structure (400).

Technical Field

The invention relates to the technical field of medical instruments, in particular to a handle structure and a dental surgical instrument.

Background

Dental surgical instruments are devices for performing dental restoration, for example, dental polishers are one type of tooth cleaning device that is primarily used for prophylaxis, treatment, and cleaning and polishing of teeth. The dental polisher comprises a polishing cup and a handle, wherein a driving piece in the handle is in transmission connection with a polishing head of the polishing cup so as to drive the polishing head to operate. When the polishing cup works, the polishing cup is tightly attached to the surface of a tooth, and cleaning and polishing are carried out by coating special polishing paste for prevention on the polishing head, at the moment, the rotating speed is generally 1500-one-time 4000r/min, or the polishing head is coated with special glaze sealing and anti-caries paste, damaged enamel can be filled and repaired, the accumulation of pigment deposits is avoided, and the rotating speed is generally 500-one-time 1000 r/min.

However, the inventor finds that the existing dental polishing machine has the technical problem of poor polishing effect when polishing operation is carried out.

Disclosure of Invention

The object of the present invention consists, for example, in providing a handle structure which allows to remedy the above-mentioned problems of the prior art.

It is also an object of the present invention to provide a dental surgical instrument which ameliorates the above-mentioned problems of the prior art.

Embodiments of the invention may be implemented as follows:

embodiments of the present invention provide a handle structure for connection with a head structure of a dental surgical instrument, the handle structure comprising:

a drive member;

the needle clamping shaft core is in transmission connection with the driving piece and provided with an accommodating hole, and the accommodating hole is used for being inserted into a transmission long shaft of the head structure so as to drive the transmission long shaft to rotate under the condition that the needle clamping shaft core rotates; and

follow two at least tight round pins of clamp needle arbor core circumference setting, be provided with on the clamp needle arbor core with two at least draw-in grooves of accommodation hole intercommunication, two at least tight round pin one-to-ones of clamp set up in two at least draw-in grooves, just two at least tight round pins of clamp are used for pressing from both sides tightly the transmission major axis.

Optionally, the clamping groove penetrates through the needle clamping shaft core, the handle structure further comprises a spring sleeved on the needle clamping shaft core, and the spring is used for exerting a force pointing to the axis of the accommodating hole on the clamping pin under the condition that the transmission long shaft exerts a force outwards along the radial direction on the clamping pin.

Optionally, the handle structure further comprises a limit nut, and the limit nut is in threaded connection with the needle clamping shaft core; the utility model discloses a clamp needle axle core, including clamp needle axle core, spring, limit nut, draw-in groove, the both ends of clamp needle axle core periphery are provided with spacing step, the both ends of spring respectively with limit nut with spacing step is contradicted, and follows the axial of clamp needle axle core, spacing step with limit nut is located respectively the both sides of draw-in groove.

Optionally, the handle structure still includes bender connector, first bearing and second bearing, the bender connector cover is established press from both sides the needle spindle core, first bearing with the second bearing overlaps respectively and locates press from both sides the axial both ends of needle spindle core, just first bearing with the second bearing supports respectively the bender connector with press from both sides between the needle spindle core.

Optionally, the handle structure further comprises a bearing tightening nut and a motor connecting piece, wherein the bearing tightening nut is abutted against the second bearing to apply a pre-tightening force to the second bearing; the bearing jacking nut is positioned in the bending machine connector and is in threaded connection with the bending machine connector; one end of the motor connecting piece is in threaded connection with the driving piece, and the inner peripheral surface of the bearing jacking nut is matched with the outer peripheral surface of one end, far away from the driving piece, of the motor connecting piece, so that the bearing jacking nut, the bending machine connector, the motor connecting piece and the needle clamping shaft core are coaxially arranged.

Optionally, the handle structure further comprises a protective sleeve, the bending machine connector is fixedly connected to the protective sleeve, and the driving piece is sleeved with the protective sleeve.

Optionally, the handle structure further comprises a handle housing, and the driving member is disposed in the handle housing; the handle is characterized in that a buckle piece is arranged on the outer wall of the handle shell, a snap ring is arranged in the protective sleeve, the handle shell is sleeved with the protective sleeve, and the buckle piece is clamped with the snap ring so that the protective sleeve is detachably connected with the handle shell.

Optionally, the handle structure further comprises a coupler fixedly connected with an output shaft of the driving part, a guide inclined plane is arranged at one end, close to the driving part, of the needle clamping shaft core, and the guide inclined plane is used for guiding the needle clamping shaft core and the coupler in a matched mode.

Embodiments of the present invention also provide a dental surgical instrument. The dental surgical instrument comprises a head structure and the handle structure, wherein a transmission long shaft of the head structure is inserted into a containing hole of the needle clamping shaft core, and the at least two clamping pins are wound on the transmission long shaft so as to clamp the transmission long shaft relative to the needle clamping shaft core.

Optionally, the dental surgical instrument further comprises a charging base, and the handle structure further comprises a rechargeable battery electrically connected to the driving member; the charging base is used for charging the rechargeable battery.

Optionally, the dental surgical instrument further comprises a foot structure in communication with the drive member for controlling the drive member via the foot structure.

The handle structure and the dental surgical instrument of the embodiment of the invention have the advantages that:

embodiments of the present invention provide a handle structure that includes a drive member, a gripper hub, and at least two gripper pins. The driving piece is connected with the needle clamping shaft core in a transmission mode, the needle clamping shaft core is provided with a containing hole used for being connected with a transmission long shaft of the head structure in an inserting mode, the needle clamping shaft core drives the transmission long shaft to rotate when driven by the driving piece to rotate, and therefore power transmission between the driving piece and the transmission long shaft is achieved. At least two clamp pin distribute along the circumference of pressing from both sides the needle beam core, and press from both sides and be provided with two at least draw-in grooves with the accommodation hole intercommunication on the needle beam core, two at least clamp pin one-to-ones set up in two at least draw-in grooves to press from both sides the transmission major axis through two at least clamp pins and press from both sides tightly, make the connection between needle beam core and the transmission major axis more reliable and stable, and then make the power transmission between needle beam core and the transmission major axis more stable, thereby help guaranteeing the working effect of head structure.

Embodiments of the present invention also provide a dental surgical instrument including the above-described handle structure. Because the dental surgical instrument comprises the handle structure, the dental surgical instrument also has the advantages of stable power transmission and good working effect.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed 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 dental surgical instrument according to an embodiment of the present invention;

FIG. 2 is a schematic view of an internal structure of a dental surgical instrument according to an embodiment of the present invention;

FIG. 3 is an enlarged view of a portion of the structure at III in FIG. 2;

FIG. 4 is an exploded view of a portion of a handle structure provided by an embodiment of the present invention;

FIG. 5 is a partial structural cross-sectional view of a handle structure provided by an embodiment of the present invention;

FIG. 6 is a schematic structural view of a head structure of a dental surgical instrument according to an embodiment of the present invention;

FIG. 7 is a schematic view of a handle portion of the handle structure provided by an embodiment of the present invention;

FIG. 8 is a schematic structural view of a foot rest structure of a dental surgical instrument according to an embodiment of the present invention;

FIG. 9 is a schematic view of the internal structure of the sleeve portion of the handle structure provided by an embodiment of the present invention;

fig. 10 is a schematic structural diagram of the external shape of the sleeve portion in the handle structure according to the embodiment of the present invention.

Icon: 10-dental surgical instruments; 100-handle structure; 110-a handle portion; 111-a handle housing; 112-a drive member; 113-a rechargeable battery; 114-PCB circuit board; 115-key switches; 116-key cover; 117-locking sleeve; 118-a motor connection; 119-a coupling; 121-a fastener; 130-a sleeve portion; 131-a bender connector; 132-a protective sleeve; 1321-sleeve head; 1322-sleeve tail; 133-a first bearing; 134-a second bearing; 135-clamping the needle shaft core; 1351-mounting holes; 1352-card slot; 1353-a limit step; 1354-guide ramp; 136-a clamping pin; 137-a spring; 138-a snap ring; 139-silica gel key; 141-a limit nut; 142-three arch spring mat; 143-bearing tightening nuts; 200-a head structure; 211-a head housing; 212-drive major axis; 213-driven shaft; 214-a polishing head; 300-a charging base; 400-pedal structure.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the 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 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 figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.

In the description of the present invention, it should be noted that if the terms "upper", "lower", "inside", "outside", etc. indicate an orientation or a positional relationship based on that shown in the drawings or that the product of the present invention is used as it is, this is only for convenience of description and simplification of the description, and it does not indicate or imply that the device or the element referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus should not be construed as limiting the present invention.

Furthermore, the appearances of the terms "first," "second," and the like, if any, are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.

It should be noted that the features of the embodiments of the present invention may be combined with each other without conflict.

Fig. 1 is a schematic view of an external structure of a dental surgical instrument 10 provided in this embodiment, fig. 2 is a schematic view of an internal structure of the dental surgical instrument 10 provided in this embodiment, fig. 3 is an enlarged schematic view of a portion of a structure at iii in fig. 2, fig. 4 is an exploded view of a portion of a structure of a handle structure 100 provided in this embodiment, and fig. 5 is a cross-sectional view of a portion of the structure of the handle structure 100 provided in this embodiment. Referring to fig. 1-5, the present embodiment provides a handle structure 100 and a dental surgical instrument 10.

Fig. 6 is a schematic structural diagram of a head structure 200 of the dental surgical instrument 10 according to the present embodiment. Referring to fig. 1, fig. 2, fig. 3 and fig. 6, the dental surgical instrument 10 includes a handle structure 100 and a head structure 200, in this embodiment, the dental surgical instrument 10 is described by taking a dental polishing machine as an example, and accordingly, the head structure 200 is a polishing cup of the dental polishing machine. The head structure 200 includes a head housing 211, a transmission long shaft 212, a driven shaft 213, and a polishing head 214, wherein the transmission long shaft 212 and the driven shaft 213 are both connected to the head housing 211, and the transmission long shaft 212 and the driven shaft 213 are in transmission connection through bevel gears, so that power is transmitted from the transmission long shaft 212 to the driven shaft 213. One end of the head housing 211 is provided with a first opening, and the transmission long shaft 212 is in transmission connection with the handle structure 100 through the first opening; the other end of the head housing 211 is provided with a second opening, and an axial end of the driven shaft 213 extends out of the second opening to be in transmission connection with a polishing head 214 located outside the head housing 211, so as to drive the polishing head 214 to rotate, thereby performing polishing operation.

Referring to fig. 1-5, the handle structure 100 includes a driving member 112, a needle clamping mandrel 135, and at least two clamping pins 136. The driving member 112 is connected to the needle-clamping spindle 135 in a driving manner, and the needle-clamping spindle 135 has a receiving hole for being inserted into the transmission long shaft 212 of the head structure 200, and the needle-clamping spindle 135 drives the transmission long shaft 212 to rotate when being driven by the driving member 112, so as to achieve power transmission between the driving member 112 and the transmission long shaft 212. The at least two clamping pins 136 are distributed along the circumferential direction of the needle clamping shaft core 135, the at least two clamping grooves 1352 communicated with the accommodating hole are formed in the needle clamping shaft core 135, the at least two clamping pins 136 are arranged in the at least two clamping grooves 1352 in a one-to-one correspondence manner, so that the transmission long shaft 212 is clamped through the at least two clamping pins 136, the connection between the needle clamping shaft core 135 and the transmission long shaft 212 is more stable and reliable, the power transmission between the needle clamping shaft core 135 and the transmission long shaft 212 is more stable, and the working effect of the head structure 200 is guaranteed.

The handle structure 100 provided in the present embodiment is further described below:

fig. 7 is a schematic structural diagram of the handle portion 110 in the handle structure 100 provided in this embodiment. Referring to fig. 2, fig. 3 and fig. 7, in the present embodiment, the handle structure 100 includes a handle portion 110. Specifically, the handle portion 110 includes a handle housing 111 and a driving member 112 disposed in the handle housing 111, and an upper end of the handle housing 111 is open, so that the driving member 112 in the handle housing 111 can be in transmission connection with the needle clamping shaft 135 outside the handle housing 111 through the opening. In this embodiment, the driving member 112 is a motor.

Optionally, the handle portion 110 further includes a rechargeable battery 113 and a PCB 114(Printed Circuit Board) disposed in the handle housing 111, the PCB 114 is electrically connected to the driving member 112 and the rechargeable battery 113, so as to electrically connect the rechargeable battery 113 and the driving member 112, and the driving member 112 can be controlled by the PCB 114 to start and stop the driving member 112 and control the rotation speed of the driving member 112, so as to enable the dental surgical instrument 10 to be located in different working positions. Due to the provision of the rechargeable battery 113, the handle structure 100 does not need to be provided with power supply wires, thereby facilitating a more flexible use of the dental surgical instrument 10. Further, the dental surgical instrument 10 further includes a charging base 300 (shown in fig. 1), so that the charging battery 113 is charged through the charging base 300, thereby realizing wireless charging of the handle structure 100.

Furthermore, a mounting hole 1351 is formed in the circumferential direction of one end of the handle housing 111 near the opening, the handle portion 110 further includes a key switch 115 mounted in the mounting hole 1351, the key switch 115 is electrically connected to the PCB 114 through a wire, when in use, the driving member 112 is controlled by operating the key switch 115, for example, when the key switch 115 is pressed for a short time to perform power-on control, and when in use, the key switch 115 is pressed for a long time to perform rotation speed adjustment for 2-3 seconds, and the like. Further, the handle portion 110 further includes a key sheath 116 wrapped around the key switch 115, and the key sheath 116 is annularly sleeved on the handle housing 111.

Fig. 8 is a schematic structural view of a footrest structure 400 of the dental surgical instrument 10 provided in this embodiment. Referring to fig. 1, 2, 3 and 8 in combination, dental surgical instrument 10 optionally further includes a foot structure 400, foot structure 400 being in communication with drive member 112 for controlling drive member 112 via foot structure 400. Specifically, the pedal structure 400 communicates with the PCB circuit board 114 through bluetooth, and further communicates with the driving member 112 and the pedal structure 400 through the PCB circuit board 114, and the PCB circuit board 114 controls the driving member 112 through a control command sent by the pedal structure 400.

Further, handle portion 110 includes a locking sleeve 117 and a motor coupling 118. One end of the motor connector 118 extends into the handle housing 111 and is screwed with the driving member 112 to ensure the coaxiality of the motor connector 118 and the output shaft of the driving member 112. The locking sleeve 117 is disposed at the opening of the handle housing 111 and is fixedly connected to the handle housing 111 to limit the motor connecting member 118. Further, the handle 110 further includes a coupling 119 fixedly connected to the output shaft of the driving member 112, the coupling 119 is located in the motor connecting member 118, and the needle clamping shaft 135 extends into the motor connecting member 118 to realize a transmission connection with the driving member 112 through the fixed connection with the coupling 119. Alternatively, the coupling 119 is fixed to the output shaft of the driving member 112 by laser welding, thereby ensuring the coaxiality of the coupling 119 with the output shaft.

Fig. 9 is a schematic view of an internal structure of the sleeve portion 130 in the handle structure 100 provided in this embodiment, and fig. 10 is a schematic view of an external structure of the sleeve portion 130 in the handle structure 100 provided in this embodiment. Referring to fig. 1 to 10, in the present embodiment, the handle structure 100 further includes a sleeve portion 130, the sleeve portion 130 is sleeved on the handle portion 110 to protect the handle portion 110, and the sleeve portion 130 is detachably connected to the handle portion 110.

Specifically, the sleeve portion 130 includes a bender connector 131, a protection sleeve 132, a first bearing 133, a second bearing 134, a gripper hub 135, and at least two gripper pins 136. The protective sleeve 132 is sleeved outside the handle portion 110 to protect the handle portion 110, so as to prevent the handle portion 110 from being infected, reduce the abrasion and damage of the handle portion 110, and prolong the service life of the handle portion 110. Further, a buckle 121 is arranged on the outer wall of the handle shell 111, a snap ring 138 is arranged in the protective sleeve 132, and when the handle shell 111 is sleeved with the protective sleeve 132, the buckle 121 is clamped with the buckle, so that the protective sleeve 132 is detachably connected with the handle shell 111. Specifically, the protective sleeve 132 includes a sleeve head 1321 and a sleeve tail 1322 that are connected to each other, and the sleeve head 1321 is provided with a silicone key 139, and when the protective sleeve 132 is sleeved on the handle portion 110, the silicone key 139 corresponds to the key switch 115 of the handle portion 110, that is, the operation on the key switch 115 is realized by pressing the silicone key 139.

The bender connector 131 is fixedly connected with the protective sleeve 132, and the bender connector 131 is covered with the needle clamping shaft core 135. The bender connector 131 and the needle clamping shaft core 135 are supported by the first bearing 133 and the second bearing 134 to ensure the coaxiality of the bender connector 131 and the needle clamping shaft core 135, in other words, the first bearing 133 and the second bearing 134 are respectively sleeved at two axial ends of the needle clamping shaft core 135, and the outer peripheral surfaces of the first bearing 133 and the second bearing 134 are respectively matched with the bender connector 131. Specifically, the bender connector 131 is used to plug with the head housing 211 of the head structure 200 to connect the head structure 200 with the handle structure 100. The outer peripheral surface of the bending machine connector 131 for fitting with the head housing 211 is provided with a seal ring, so that a gap between the bending machine connector 131 and the head housing is sealed by the seal ring, and impurities such as body fluid and the like are prevented from entering the handle structure 100 through the gap and damaging the handle structure 100 during operation. Optionally, a plurality of glue storing grooves are formed in the outer peripheral surface of one end, away from the handle structure 100, of the bending machine connector 131, anaerobic glue is uniformly applied to the glue storing grooves, the bending machine connector 131 is pressed into the sleeve head 1321 by using a press machine, and after the anaerobic glue is dried, the bending machine connector 131 and the protective sleeve 132 can be fixedly connected.

The needle clamping shaft core 135 is a circular tubular member, and a through hole therein is a receiving hole for inserting the transmission long shaft 212. At least two clamping grooves 1352 are arranged on the needle clamping shaft core 135 along the circumferential direction of the needle clamping shaft core 135, the at least two clamping grooves 1352 are communicated with the accommodating holes, and at least two clamping pins 136 are arranged in the at least two clamping grooves 1352 in a one-to-one correspondence manner, when the transmission long shaft 212 is inserted into the accommodating holes, the clamping pins 136 abut against the outer wall of the transmission long shaft 212, so that the transmission long shaft 212 is clamped through the combined action of the at least two clamping pins 136. In this embodiment, the number of the clamping pins 136 is three, and accordingly, three clamping grooves 1352 are formed in the needle clamping shaft core 135, the three clamping grooves 1352 are uniformly distributed along the circumferential direction of the needle clamping shaft core 135, and the three clamping pins 136 are correspondingly arranged in the three clamping grooves 1352 one to one, so that the transmission long shaft 212 can be stably clamped, the coaxiality of the transmission long shaft 212 and the needle clamping shaft core 135 can be ensured, the stability of power transmission after the head structure 200 is plugged can be ensured, and the noise generated in the transmission process can be effectively reduced due to the high coaxiality.

It should be noted that, in this embodiment, the number of the clamping pins 136 is three, and accordingly, the number of the card slots 1352 is three, and it should be understood that, in other embodiments, the number of the clamping pins 136 may also be specifically set according to requirements, for example, the number of the clamping pins 136 is set to be two or four, and the like.

Further, the clamping groove 1352 is a through groove penetrating through the needle clamping shaft core 135, that is, two ends of the clamping groove 1352 respectively penetrate through the inner circumferential wall and the outer circumferential wall of the needle clamping shaft core 135. The sleeve portion 130 further includes a spring 137 which is fitted around the needle-holding hub 135, and since the catching groove 1352 penetrates the outer circumferential wall of the needle-holding hub 135, a portion of the catching pin 136 fitted in the catching groove 1352 protrudes out of the outer circumferential wall of the needle-holding hub 135 to interfere with the spring 137. In the case where drive shaft 212 applies a radially outward force to clamp pin 136, spring 137 applies a force to clamp pin 136 directed toward the axial center of the receiving hole to ensure clamping of drive shaft 212. Further, the gripping pin 136 is a cylindrical pin (i.e., substantially bullet-shaped) with a tapered end, and correspondingly, the catching groove 1352 is a strip-shaped hole extending along the axial direction of the gripper core 135.

Further, the sleeve portion 130 further includes a limit nut 141, and the limit nut 141 is screwed with the needle clamping shaft core 135. The outer periphery of the needle clamping shaft core 135 is provided with a limiting step 1353, two ends of the spring 137 are respectively abutted against the limiting nut 141 and the limiting step 1353, and along the axial direction of the needle clamping shaft core 135, the limiting step 1353 and the limiting nut 141 are respectively positioned at two sides of the clamping groove 1352, namely the outer periphery of the clamping pin 136 is covered by the spring 137.

Further, the sleeve portion 130 further includes a three-arch spring washer 142, and the three-arch spring washer 142 is disposed between the limit nut 141 and the first bearing 133, so that the first bearing 133 is pre-tensioned by the three-arch spring washer 142 and the limit nut 141.

In this embodiment, the sleeve portion 130 further includes a bearing tightening nut 143, and the bearing tightening nut 143 abuts against a side of the second bearing 134 away from the first bearing 133 to apply a pre-tightening force to the second bearing 134. The bearing tightening nut 143 is located in the bending machine connector 131, and the bearing tightening nut 143 is screwed with the bending machine connector 131 to adjust the pre-tightening force of the second bearing 134 by screwing the bearing tightening nut. After the installation, motor connector 118 protrudes the one end of lock sleeve 117, motor connector 118 keeps away from the one end of driving piece 112 promptly, insert in bearing top nut 143, and the outer peripheral face cooperation of the inner peripheral surface of bearing top nut 143 and the one end that driving piece 112 was kept away from to motor connector 118, in order to guarantee the axiality of bearing top nut 143 and motor connector 118, and then make bearing top nut 143, bender connector 131, motor connector 118, press from both sides the equal coaxial setting of syringe needle axle core 135, and the axiality is high, help reducing the noise of operation in-process, improve and use experience.

In this embodiment, the end of the gripper pin shaft 135 close to the driving member 112 is provided with a guiding bevel 1354, and the guiding bevel 1354 is used for guiding the engagement of the gripper pin shaft 135 and the coupling 119, so as to facilitate the coaxial connection of the gripper pin shaft 135 and the coupling 119. Specifically, the guide ramp 1354 is set at a 45 ° slope.

According to the dental surgical instrument 10 provided in the present embodiment, the working principle of the dental surgical instrument 10 is as follows:

during the use, realize the start-up of dental surgical instrument 10 through pressing silica gel button 139 or stepping on pedal structure 400 to the rotational speed of driving piece 112 is realized to accessible pedal structure 400 or long press silica gel button 1392-3 seconds, and then makes dental surgical instrument 10 be in different gears. When the driving member 112 is started, the driving member 112 drives the needle clamping shaft core 135 to transmit through the coupling 119, so that the transmission long shaft 212 is driven to rotate through the needle clamping shaft core 135, and the power of the transmission long shaft 212 drives the polishing head 214 to rotate through the driven shaft 213, thereby performing the polishing operation.

The present embodiment provides a handle structure 100 with at least the following advantages:

according to the handle structure 100 provided by the embodiment of the invention, the connection and power transmission between the handle and the transmission long shaft 212 of the head structure 200 are realized by arranging the needle clamping shaft core 135 and the at least two clamping pins 136, so that the power transmission between the needle clamping shaft core 135 and the transmission long shaft 212 is more stable, and the working effect of the head structure 200 is ensured. Meanwhile, the click connecting piece is connected with the driving piece 112 through threads, so that coaxial matching with an output shaft of the driving piece 112 is realized, and the outer wall of the motor connecting piece 118 is matched with the bearing tightening nut 143 to realize coaxial matching; the coupler 119 and the output shaft are fixed through laser welding to realize coaxial matching with the output shaft; the bearing jacking nut 143 is coaxially matched with the bending machine connector 131 through threads, and the inner wall of the bearing jacking nut 143 is matched with the motor connector 118 to realize coaxial matching with the motor connector 118; the outer ring of first bearing 133 and second bearing 134 all cooperates with the inner wall of bender connector 131, the inner ring of first bearing 133 and second bearing 134 all cooperates with the outer wall of double-layered needle spindle 135 is coaxial, thereby realized the coaxial cooperation of bender connector 131 with double-layered needle spindle 135, and then realized shaft coupling 119 and the coaxial cooperation of double-layered needle spindle 135, realized the direction between sleeve portion 130 and the handle portion 110, and then help reducing the noise in the use, use and experience better.

The handle 110 and the sleeve 130 are detachably connected by the engagement of the engaging member 121 and the snap ring 138, and the wear of the protective sleeve 132 when the sleeve 130 is repeatedly attached and detached can be reduced by installing the snap ring 138 in the protective sleeve 132. The driving member 112 can be controlled by the key switch 115, or can be controlled by the pedal structure 400 matching with the handle structure 100 in bluetooth, so that the operation is convenient, and the shutdown operation can be set as that the handle structure 100 is placed for 10 minutes without operation or can be shutdown by inserting the charging base 300 plugged with a power supply.

Embodiments of the present invention also provide a dental surgical instrument 10 that includes the handle structure 100 described above. Since the dental surgical instrument 10 includes the above-described handle structure 100, the overall advantageous effects of the handle structure 100 are also obtained.

The above description is only for the specific embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are included in the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the appended claims.