Electric dental handle and gap increasing elevator blade formed by same

Abstract

The utility model discloses an electric dental handle and a gap increasing elevator blade formed by the same, and relates to the technical field of oral medical equipment. A handle shell is detachably connected with a dental tool head through a connecting assembly; the electric dental handle comprises a handle shell, a driving motor, a driving shaft, a driven shaft, a return spring and a guide pin; the gap increasing elevator blade comprises the electric dental handle, a connecting assembly and a dental tool head; and the dental tool head is an erect head. A driving motor is designed to drive a driven shaft to do reciprocating rectilinear motion, and forward power is provided for an elevator serving as a dental tool head.

Description

Technical Field

[0001] This utility model relates to the field of oral medical equipment technology, specifically to an electric dental handpiece and the gap-increasing blade it comprises. Background Technology

[0002] Some existing dental devices rely on dental handpieces and their attached tips to fulfill specific dental needs. The dental handpiece and tool tip are detachably connected for easy cleaning of the tool tip. The dental handpiece has a drive end to move the tool tip, primarily through rotation and forward movement.

[0003] Most handles used to drive the tool head forward are pneumatic, driven by cylinders. This cylinder structure requires the handle to remain continuously connected to the air supply, resulting in relatively poor ease of use and portability. Utility Model Content

[0004] The primary objective of this invention is to provide an electric dental handpiece that uses a motor to drive the forward movement of the dental tool head, making it more convenient to use and more portable.

[0005] The second objective of this invention is to provide a gap-increasing tapping tool composed of an electric dental handpiece. The electric dental handpiece is detachably connected to the tapping head, and under the drive of a motor, the tapping head increases the gap between the tooth and the alveolar bone wall.

[0006] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0007] An electric dental handpiece, wherein the handpiece housing is detachably connected to a dental tool head via a connecting assembly; includes a handpiece housing, a drive motor, a drive shaft, a return spring, and a guide pin;

[0008] A drive motor is fixed inside the handle housing; the output end of the drive motor is connected to one end of the drive shaft via a spline; the other end face of the drive shaft is provided with a ratchet-type drive tooth; the end face of the driven shaft is provided with a ratchet-type driven tooth that cooperates with the drive tooth; the drive tooth is provided with an inclined surface, and the driven tooth is provided with an inclined surface opposite to the inclined surface of the drive tooth; when the drive shaft rotates, the inclined surfaces of the drive tooth and the driven tooth cooperate, causing the drive motor to rotate and drive the driven shaft forward;

[0009] A guide structure is provided between the driven shaft and the handle housing, and the guide structure restricts the rotation of the driven shaft;

[0010] A return spring is provided between the driven shaft and the handle housing, and the driven shaft drives the dental tool head forward.

[0011] As a preferred technical solution, the handle shell is a split structure formed by threaded connection.

[0012] As a preferred technical solution, the handle shell is provided with an interface, through which an external power source is connected to supply power to the drive motor.

[0013] As a preferred technical solution, a battery is installed inside the handle housing. The battery is connected to an external power source through the aforementioned interface, and the battery supplies power to the channel motor.

[0014] As a preferred technical solution, a control circuit board is provided inside the handle housing, and a display screen connected to the control circuit board is provided on the handle housing; a battery supplies power to the control circuit board and the display screen.

[0015] As a preferred technical solution, the handle shell is equipped with operation buttons to control the operation of the drive motor.

[0016] The aforementioned gap-increasing tip composed of an electric dental handpiece includes an electric dental handpiece, a connecting component, and a dental tool head; the dental tool head is a tip.

[0017] The connecting assembly includes a support sleeve housed within the handle housing, a directional connecting sleeve within the support sleeve, and a sliding washer connected to one end face of the directional connecting sleeve via a spring. The directional connecting sleeve and the sliding washer have overlapping projection limit holes. The directional sleeve and the support sleeve are rotatably connected. The sliding washer is supported by the directional sleeve, and the directional sleeve has an axially extending insertion hole. One end of the insertion head has a locking head and a locking portion. The insertion hole has a locking area that matches the shape of the locking portion. The size of the locking portion is larger than the size of the locking head. The locking head matches the shape of the limit hole. When the locking head is inside the directional connecting sleeve, the locking portion is inside the locking hole. The size of the locking portion is larger than the size of the locking head. The limit hole is a non-circular hole. The cross-section of the locking area is non-circular.

[0018] As a preferred technical solution, a rotation damping component is provided between the support sleeve and the directional sleeve.

[0019] As a preferred technical solution, the rotation damping assembly includes a spring pin, a mounting groove, and an arc-shaped groove; the mounting groove and the arc-shaped groove are respectively disposed on the directional sleeve and the support sleeve; one end of the spring pin is disposed in the mounting groove, and the other end of the spring pin is disposed in the arc-shaped groove.

[0020] Compared with existing technologies, it has the following advantages:

[0021] This invention discloses an electric dental handpiece that uses a drive motor to apply forward power to the dental tool head, replacing the cylinder structure in the prior art, making it more convenient and portable to use.

[0022] This utility model discloses a gap-increasing cutting edge, which uses a drive motor to apply forward power to the cutting head. Attached Figure Description

[0023] Figure 1 This is a cross-sectional view of the present invention.

[0024] Figure 2 This is an exploded view of the present invention.

[0025] The reference numerals in the attached figures are as follows:

[0026] 1-Handle housing, 2-Rotating housing, 3-Drive motor, 4-Interface, 5-Control circuit board, 6-Mounting bracket, 7-Display screen, 8-Battery, 9-Drive shaft, 10-Driven shaft, 11-Bearing, 12-Guide pin, 13-Return spring, 14-Drive tooth, 15-Shaft housing, 16-Orienting connecting sleeve, 17-Spring, 18-Sliding washer, 19-Support sleeve, 20-Orienting sleeve, 21-Thrust head, 22-Spring pin. Detailed Implementation

[0027] The purpose of this utility model is to overcome the defects of the prior art and provide an electric dental handpiece and the gap-increasing tip it constitutes. The utility model will be further described in detail below with reference to the embodiments.

[0028] Example 1

[0029] An electric dental handpiece includes a handpiece housing, a drive motor, a drive shaft, a driven shaft, a return spring, a guide pin, and a shaft housing.

[0030] A drive motor is fixed inside the handle housing, and the drive motor is fixed by means of bonding or mounting bracket. The output end of the drive motor is connected to one end of the drive shaft via a spline.

[0031] The other end face of the drive shaft is provided with a ratchet-type driving tooth; the end face of the driven shaft is provided with a ratchet-type driven tooth that mates with the driving tooth. The driving tooth has an inclined surface, and the driven tooth has an inclined surface opposite to that of the driving tooth. When the drive shaft rotates, the engagement inclined surfaces of the driving and driven teeth cause the drive motor to rotate, driving the driven shaft forward.

[0032] In some feasible embodiments, a shaft housing is provided inside the handle housing, located between the drive shaft housing and the driven shaft housing; a bearing is provided between the drive shaft housing and the shaft housing. One end of the shaft housing abuts against the handle housing.

[0033] The driven shaft is fitted with a return spring. One end of the return spring abuts against the platform at one end of the driven shaft, and the other end of the return spring abuts against the shaft housing. The return spring provides a force for the driven shaft to retract.

[0034] Based on the above structure, the drive motor rotates, and the driven shaft completes reciprocating linear motion.

[0035] Furthermore, to limit the driven shaft's rotation and restrict it to reciprocating linear motion only, a guide groove is provided on the driven shaft; a threaded hole is provided on the shaft housing, with a guide pin threaded into the hole, one end of which is inserted into the guide groove. The guide groove has a certain allowance, allowing the guide pin to move along it.

[0036] In this embodiment, the driven shaft is used to drive the dental tool head connected to the electric dental handle forward.

[0037] Furthermore, the handle housing has a split structure, consisting of two separate housings and a rotating housing. The two separate housings abut against each other, and the rotating housing is fitted onto the abutment of the two separate housings and threadedly connected to the separate housings, thereby allowing for the repair and replacement of components located inside the handle housing.

[0038] As a preferred method, the torque of the aforementioned rotating housing threaded connection is so large that tools are required to separate the two.

[0039] Furthermore, the handle housing has an interface for connecting an external power source to power the drive motor.

[0040] Furthermore, a battery is installed inside the handle housing, and the battery is connected to an external power source through the aforementioned interface to supply power to the channel motor.

[0041] Furthermore, a control circuit board is housed inside the handle housing, and a display screen connected to the control circuit board is mounted on the handle housing; the battery powers the control circuit board and the display screen. The display screen can be used to show the battery level, battery charging status, and drive motor speed.

[0042] Furthermore, the handle shell is equipped with operation buttons for controlling the operation of the drive motor and sending drive motor speed adjustment commands to the control circuit board; the control circuit board controls the operation of the drive motor.

[0043] In some feasible embodiments, the display screen is a touch screen, and the operation buttons are virtual buttons on the touch screen.

[0044] Example 2

[0045] A gap-increasing dental prong includes a prong, a connecting assembly, and an electric dental handpiece as described in Example 1.

[0046] The electric dental handpiece applies forward force to the tappet through a connecting assembly. The tappet and the connecting assembly are existing technologies, but the structure is developed by the applicant and is described in Chinese patent document CN202322857092.2 - A gap-increasing tappet with a retraction function.

[0047] This embodiment provides a brief description of the connecting components and the thrust head.

[0048] The connecting components include a directional connecting sleeve, a spring, a sliding washer, a support sleeve, and a directional sleeve.

[0049] A support sleeve is provided inside the handle housing, with one end of the support sleeve abutting against the other end of the aforementioned shaft housing. The support sleeve contains a directional connecting sleeve and a sliding washer; both ends of the spring abut against the directional connecting sleeve and the sliding washer, respectively.

[0050] The directional connecting sleeve is hollow inside, and its end facing the sliding pad has a limiting hole that communicates with the hollow interior; the sliding pad has a limiting hole that coincides with the projection of the upper limiting hole of the directional connecting sleeve. The limiting holes are non-circular.

[0051] A rotatable directional sleeve is provided inside the front end of the outer casing, with one end of the directional sleeve abutting against the support sleeve; the directional sleeve can rotate relative to the support sleeve. A sliding washer abuts against the directional sleeve.

[0052] The directional sleeve has an axially extending insertion hole for the ejector head. One end of the ejector head is a cutting edge, and the other end is a locking head, the shape of which matches the limiting hole. Since both the limiting hole and the locking head are non-circular, when the locking head passes through the limiting hole, rotating the ejector head will cause the locking head to misalign with the limiting hole, preventing the ejector head from detaching from the connecting assembly.

[0053] The pusher head has a snap-fit ​​part, and the pusher head insertion hole has a snap-fit ​​area that matches the snap-fit ​​part. The size of the snap-fit ​​part is larger than the size of the pusher head. The structural dimensions of the pusher head allow it a certain amount of axial reciprocating movement space within the directional sleeve.

[0054] A damping assembly is provided on the contact surface of the support sleeve and the directional sleeve. The damping assembly includes several arc-shaped grooves arranged around the axis on the directional sleeve, and damping steel balls are provided in the arc-shaped grooves. The directional sleeve is provided with a mounting hole, and a damping spring is installed in the mounting hole. One end of the damping spring is in contact with the damping steel ball.

[0055] The connecting components and thrusters in this embodiment are existing technologies that the applicant has independently developed and obtained patent rights for. The working principle of these components will not be described in detail in this embodiment.

[0056] Example 3

[0057] The difference between this embodiment and embodiment 2 is that the damping steel ball and damping spring are replaced with a round-headed spring pin. The spring pin is located in the mounting hole of the directional sleeve, and the round head of the spring pin is located in the arc groove.

[0058] The present invention can be well implemented according to the above embodiments. It is worth noting that, based on the above structural design, even if some non-substantial modifications or refinements are made to the present invention to solve the same technical problem, the essence of the technical solution adopted is still the same as that of the present invention, and therefore it should also be within the protection scope of the present invention.

Claims

1. An electric dental handpiece, wherein the handpiece housing is detachably connected to a dental tool head via a connecting assembly; characterized in that, Includes handle housing, drive motor, drive shaft, driven shaft, return spring, and guide pin; A drive motor is fixed inside the handle housing; the output end of the drive motor is connected to one end of the drive shaft via a spline; the other end face of the drive shaft is provided with a ratchet-type drive tooth; the end face of the driven shaft is provided with a ratchet-type driven tooth that cooperates with the drive tooth; the drive tooth is provided with an inclined surface, and the driven tooth is provided with an inclined surface opposite to the inclined surface of the drive tooth; when the drive shaft rotates, the inclined surfaces of the drive tooth and the driven tooth cooperate, causing the drive motor to rotate and drive the driven shaft forward; A guide structure is provided between the driven shaft and the handle housing, and the guide structure restricts the rotation of the driven shaft; A return spring is provided between the driven shaft and the handle housing, and the driven shaft drives the dental tool head forward.

2. The electric dental handpiece according to claim 1, characterized in that, The handle housing is a split structure formed by threaded connection.

3. The electric dental handpiece according to claim 1, characterized in that, The handle shell has an interface that connects to an external power source to power the drive motor.

4. An electric dental handpiece according to claim 3, characterized in that, The handle housing contains a battery, which is connected to an external power source through the aforementioned interface, and the battery supplies power to the channel motor.

5. An electric dental handpiece according to claim 4, characterized in that, The handle housing contains a control circuit board, and the handle housing has a display screen connected to the control circuit board; the battery powers the control circuit board and the display screen.

6. An electric dental handpiece according to claim 4, characterized in that, The handle shell has operation buttons to control the operation of the drive motor.

7. A clearance-increasing tip made of an electric dental handpiece according to any one of claims 1-6, characterized in that, Includes an electric dental handpiece, connecting components, and dental tool tips; the dental tool tips are lifters. The connecting assembly includes a support sleeve housed within the handle housing, a directional connecting sleeve within the support sleeve, and a sliding washer connected to one end face of the directional connecting sleeve via a spring. The directional connecting sleeve and the sliding washer have overlapping projection limit holes. The directional sleeve and the support sleeve are rotatably connected. The sliding washer is supported by the directional sleeve, and the directional sleeve has an axially extending insertion hole. One end of the insertion head has a locking head and a locking portion. The insertion hole has a locking area that matches the shape of the locking portion. The size of the locking portion is larger than the size of the locking head. The locking head matches the shape of the limit hole. When the locking head is inside the directional connecting sleeve, the locking portion is inside the locking hole. The size of the locking portion is larger than the size of the locking head. The limit hole is a non-circular hole. The cross-section of the locking area is non-circular.

8. The gap-increasing tip of an electric dental handpiece according to claim 7, characterized in that, A rotation damping assembly is provided between the support sleeve and the directional sleeve.

9. The gap-increasing tip of an electric dental handpiece according to claim 8, characterized in that, The rotational damping assembly includes a spring pin, a mounting groove, and an arc-shaped groove; the mounting groove and the arc-shaped groove are respectively set on the directional sleeve and the support sleeve; one end of the spring pin is set in the mounting groove, and the other end of the spring pin is set in the arc-shaped groove.

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