CN212213910U

CN212213910U - Bending machine head with built-in conducting strip in back cover and root canal preparation machine

Info

Publication number: CN212213910U
Application number: CN202022305766.4U
Authority: CN
Inventors: 陶欢; 王宏灿
Original assignee: Changzhou Sifary Medical Technology Co ltd
Current assignee: Changzhou Sifary Medical Technology Co ltd
Priority date: 2020-10-15
Filing date: 2020-10-15
Publication date: 2020-12-25
Anticipated expiration: 2030-10-15

Abstract

The utility model relates to a curved aircraft nose and root canal preparation machine of built-in conducting strip of back lid, this curved aircraft nose of built-in conducting strip of back lid include aircraft nose, back lid and cutting tool, set up in the aircraft nose and be used for driving cutting tool pivoted core assembly, set up the conducting strip in the back lid, the conducting strip includes hemicycle body and elastic component, the hemicycle body cup joints in the lid of back, the tail end of elastic component links to each other with the middle part of hemicycle body, and the front end of elastic component extends to the center of hemicycle body, and the front end of elastic component contacts with the center of cutting tool terminal surface when back lid is fixed with the aircraft nose.

Description

Bending machine head with built-in conducting strip in back cover and root canal preparation machine

Technical Field

The utility model relates to a dentistry auxiliary assembly technical field, especially a curved aircraft nose and root canal preparation machine of built-in conducting strip of back lid.

Background

An apparatus is known which allows to perform a root canal treatment and simultaneously perform a root canal measurement, using a cutting tool, such as a file or a bur, which also serves as a measuring probe. In this case, the cutting tool is used as an electrode in the root canal length measuring circuit, and the measuring signal is transmitted to the control host.

Some take root canal length measurement function's bent aircraft nose will switch on circuit integration inside the aircraft nose, rely on conducting strip self elasticity to embrace the pivot and ensure that test signal can transmit cutting tool when rotatory, but the conducting strip is big with the inside relative linear velocity of rotation axis of bent machine, lead to the conducting strip wearing and tearing more easily (the life-span of conducting strip has seriously reduced), and the impurity that produces after wearing and tearing leads to rotation axis and conducting strip bad contact to influence test signal transmission many, and the brush piece is integrated inside the aircraft nose, it is very difficult and cost of maintenance very high to dismantle.

SUMMERY OF THE UTILITY MODEL

The to-be-solved technical problem of the utility model is to provide a simple structure, long service life's elbow machine head and root canal preparation machine of built-in conducting strip of back lid.

For solving the technical problem, the utility model provides a curved aircraft nose of built-in conducting strip of back lid, including aircraft nose, back lid and cutting tool, set up in the aircraft nose and be used for driving cutting tool pivoted core assembly, set up the conducting strip in the lid of back, the conducting strip includes hemicycle body and elastic component, the hemicycle body cup joints in the lid of back, the tail end of elastic component links to each other with the middle part of hemicycle body, and the front end of elastic component extends to the center of hemicycle body, and the front end of elastic component contacts with the center of cutting tool terminal surface when back lid is fixed with the aircraft nose to make conducting strip and cutting tool be in the on-state always.

Furthermore, cutting grooves are formed in the two sides of the tail end of the elastic part on the semi-ring body, the front end of the elastic part is arranged in a downward inclined mode, and the front end of the elastic part is convenient to contact with the center of the cutting tool.

Furthermore, the elastic part is an elastic sheet, a spring or an ejector pin which is arranged in a shape like a Chinese character 'ji'.

Further, the rear cover comprises a connecting cylinder and an end cap, the outer wall of the connecting cylinder is provided with a clamping groove matched with the semi-ring body, so that the semi-ring body is sleeved on the clamping groove of the connecting cylinder, and the end cap is sleeved and matched with the connecting cylinder and used for limiting the semi-ring body.

Further, the end cap is provided with a mounting hole, and a cover plate is embedded in the mounting hole.

Furthermore, the rear cover further comprises a circular pressing plate used for limiting the cover plate, an avoiding groove matched with the elastic part is formed in the pressing plate, the avoiding groove extends to the center from the edge of the pressing plate, and the elastic part can penetrate through the pressing plate.

Furthermore, the rear cover also comprises an elastic supporting piece arranged in the connecting cylinder, and the elastic supporting piece consists of a plurality of wave washers and washers arranged at intervals and provides elastic support for the pressing plate.

Further, a rectangular groove is formed in the outer wall of the connecting cylinder in the axial direction and used for avoiding the elastic portion.

Furthermore, the front end of the connecting cylinder is provided with an external thread, and the machine head is provided with an internal thread matched with the external thread, so that the rear cover is in threaded connection with the machine head.

Further, the back lid still includes the sealing washer, the outer wall of connecting cylinder sets up the annular, and the back lid is connected the back sealing washer with the aircraft nose and is arranged in the annular for provide the damping between back lid and the aircraft nose, prevent that the screw thread is not hard up.

A root canal preparation machine comprises the bending machine head with the built-in conducting strip of the back cover.

The technical effects of the utility model are that: (1) the utility model discloses a curved aircraft nose of built-in conducting strip of back lid, for prior art, cutting tool is in high-speed rotation during the use, the conducting strip is in static compression state and carries out the relative friction with the cutting tool terminal surface, because conducting strip and cutting tool relative friction are located the center of cutting tool rotation axis, so relative friction speed is very little and greatly reduced the wearing and tearing of conducting strip and cutting tool, the life of conducting strip has been promoted, in addition, because cutting tool belongs to the consumptive product, often renew, so even can appear impurity after wearing and tearing also can take away along with the cutting tool who renews and further guaranteed the electrically conductive connection performance of cutting tool and aircraft nose, even at last, even go wrong, the back lid that has the conducting strip also very easily dismantles and installs, thereby the perfect problem of solving cutting tool and conducting strip life; (2) the conducting strip is composed of a semi-ring body and an elastic part, the semi-ring body is easy to be sleeved and assembled, and the arrangement of the cutting groove is beneficial to the compression of the elastic part; the semi-ring body is subjected to limiting assembly by the end cap and the connecting cylinder, so that connection is firm, and disassembly and assembly are easy; (3) the setting of clamp plate is convenient for fix the apron.

Drawings

The invention will be described in further detail with reference to the accompanying drawings:

fig. 1 is a schematic cross-sectional structure view of a bending machine head with a conductive sheet built in a rear cover of the present invention;

FIG. 2 is a schematic view of the cross-sectional structure of the explosion of the bending machine head with a conductive sheet built in the rear cover;

fig. 3 is a schematic diagram of the explosion structure of the rear cover of the present invention;

in the figure: a cutting tool 1, a head 2, a conductive sheet 3, a semi-ring body 31, an elastic part 32, a cutting groove 33,

the back cover 4, the handpiece shell 5, the end cap 6, the mounting hole 61, the cover plate 62, the connecting cylinder 7, the annular groove 71, the rectangular groove 72, the external thread 73, the clamping groove 74, the pressing plate 8, the avoiding groove 81, the first wave-shaped gasket 91, the first gasket 92, the second wave-shaped gasket 93, the second gasket 94 and the sealing ring 95.

Detailed Description

Example 1

As shown in fig. 1 to 3, the bending machine head with a conductive plate built in a back cover of the embodiment includes a machine head 2, a back cover 4 and a cutting tool 1, a core assembly for driving the cutting tool 1 to rotate is arranged in the machine head 2, and one side of the machine head 2 is connected with a handle (not shown in the figure) through a machine head shell 5; the rear cover 4 comprises a connecting cylinder 7 and an end cap 6, a conducting plate 3 is arranged in the rear cover 4, the conducting plate 3 comprises a semi-ring body 31 and an elastic part 32 which are integrally formed, a clamping groove 74 matched with the semi-ring body 31 is formed in the outer wall of the connecting cylinder 7, so that the semi-ring body 31 is sleeved on the clamping groove 74 of the connecting cylinder 7, and the end cap 6 is in gluing fixation or interference fit with the connecting cylinder 7 after being in sleeved fit with the connecting cylinder and is used for limiting the semi-ring body 31; the tail end of the elastic part 32 is connected with the middle part of the semi-ring body 31, the front end of the elastic part 32 extends to the center of the semi-ring body 31, cutting grooves 33 are formed in two sides of the tail end of the elastic part 32 on the semi-ring body 31, the elastic part 32 is an elastic sheet (in other embodiments, a spring or an elastic thimble is also used) arranged in a shape like a Chinese character ji, the tail end of the elastic sheet is bent and connected with the semi-ring body 31, and the front end of the elastic sheet is arranged in a downward inclined manner, so that the front end of the elastic sheet is in contact with the center of the; when the back cover 4 is fixed with the machine head 2, the front end of the elastic sheet contacts with the center of the end face of the cutting tool 1, so that the conductive sheet 3 and the cutting tool 1 are always in a conducting state.

Preferably, the end cap 6 is provided with a mounting hole 61, and a cover plate 62 is fitted to the mounting hole 61 for observing the conductive sheet 3.

Preferably, the rear cover 4 further includes a circular pressing plate 8 for limiting the cover plate 62, the pressing plate 8 is provided with an avoiding groove 81 matched with the elastic portion 32, and the avoiding groove 81 extends from the edge of the pressing plate 8 to the center so that the elastic portion 32 can pass through the pressing plate 8.

Preferably, the rear cover 4 further includes an elastic support member disposed in the connecting cylinder 7, and the elastic support member is composed of a first wave washer 91, a first washer 92, a second wave washer 93, and a second washer 94, which are spaced apart from each other, and provides elastic support to the pressing plate 8.

Preferably, a rectangular groove 72 is provided in the outer wall of the connecting cylinder 7 in the axial direction to avoid the elastic portion 32.

Preferably, the front end of the connecting cylinder 7 is provided with an external thread 73, and the machine head 2 is provided with an internal thread matched with the external thread 73, so that the rear cover 4 is in threaded connection with the machine head 2.

Preferably, the rear cover 4 further comprises a sealing ring 95, the outer wall of the connecting cylinder 7 is provided with an annular groove 71, and the sealing ring 95 is arranged in the annular groove 71 after the rear cover 4 is connected with the handpiece 2 and is used for providing a damping effect between the rear cover 4 and the handpiece 2 and preventing the screw thread from loosening.

Example 2

A root canal preparation machine, comprising the bending machine head with the built-in conducting strip of the back cover in embodiment 1.

It should be understood that the above examples are only for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And that obvious changes and modifications may be made without departing from the spirit of the invention.

Claims

1. The utility model provides a curved aircraft nose of built-in conducting strip of back lid, its characterized in that includes aircraft nose, back lid and cutting tool, set up in the aircraft nose and be used for driving cutting tool pivoted core assembly, set up the conducting strip in the lid of back, the conducting strip includes hemicycle body and elastic component, the hemicycle body cup joints in the lid of back, the tail end of elastic component links to each other with the middle part of hemicycle body, and the front end of elastic component extends to the center of hemicycle body, and the front end of elastic component contacts with the center of cutting tool terminal surface when back lid is fixed with the aircraft nose.

2. The bending machine head with the built-in conducting strip of the back cover as claimed in claim 1, wherein the semi-ring body is provided with cutting grooves at two sides of the tail end of the elastic part, and the front end of the elastic part is inclined downwards.

3. The bending machine head with the built-in conductive sheet of the back cover as claimed in claim 2, wherein said elastic portion is an elastic sheet arranged in a zigzag shape, or a spring, or a thimble.

4. The bender head with a built-in conductive sheet of the back cover as claimed in claim 3, wherein said back cover comprises a connecting cylinder and an end cap, the outer wall of the connecting cylinder is provided with a slot adapted to the half ring body, so that the half ring body is sleeved on the slot of the connecting cylinder.

5. The bender head with a built-in conductive sheet for the back cover as claimed in claim 4, wherein said end cap is provided with a mounting hole, and a cover plate is embedded in the mounting hole.

6. The bender head with the built-in conducting strip of the back cover as claimed in claim 5, wherein the back cover further comprises a circular pressing plate for limiting the cover plate, an avoiding groove matched with the elastic part is arranged on the pressing plate, the avoiding groove extends from the edge of the pressing plate to the center, so that the elastic part can pass through the pressing plate.

7. The bender head with a built-in conductive strip for a rear cover as claimed in claim 6, wherein said rear cover further comprises an elastic support member disposed in the connecting cylinder, said elastic support member is composed of a plurality of wave washers and washers disposed at intervals.

8. The bender head with a built-in conductive strip for a rear cover as claimed in claim 7, wherein a rectangular groove is axially formed on the outer wall of said connecting cylinder.

9. The bending machine head with the built-in conducting strip of the back cover as claimed in claim 8, wherein the front end of the connecting cylinder is provided with an external thread, and the machine head is provided with an internal thread matched with the external thread.

10. A root canal preparation machine comprising the bending head with the conductive sheet built in the back cover according to any one of claims 1 to 9.