Head conductive mechanism and dental handpiece

Abstract

The utility model discloses a handpiece conductive mechanism and a dental handpiece. The handpiece conductive mechanism comprises a handpiece shell, a shaft core and a conductive structure, and the shaft core is rotatably mounted on the handpiece shell; the electric conduction structure is fixedly installed on the machine head shell, the electric conduction structure comprises a plurality of elastic electric conduction pieces, the elastic electric conduction pieces are annularly arranged on the peripheral side of the shaft core at intervals, and the elastic electric conduction pieces make elastic electric contact with the peripheral wall of the shaft core. The conductive structure is in elastic electric contact with the peripheral wall of the shaft core through the plurality of elastic conductive parts so as to improve the stability of electric contact, when the shaft core rotates at a high speed, if a deflection phenomenon occurs, the elastic conductive parts and the shaft core can be ensured to form electric conduction no matter the shaft core deviates towards any direction of the periphery, and the service life of the shaft core is prolonged. And the phenomenon of disconnection caused by poor contact between the conductive structure and the shaft core rotating at a high speed is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of dental treatment equipment, and particularly relates to a nose-piece conductive mechanism and a dental handpiece. Background Art

[0002] Root canal treatment is currently the most effective and commonly used method for treating pulp diseases and periapical diseases. The dental root canal treatment curved handpiece belongs to a type of dental medical instrument handpiece. In the dental root canal treatment curved handpiece, the electrical measurement method is often used to measure the length of the root canal. During root canal treatment, one electrode contacts the patient's lips, and the other electrode contacts the root canal through a bur. The length of the root canal is indirectly measured through the resistance value. Currently, there are various dental root canal treatment curved nose-pieces on the market. By setting various conductive structures inside them, the conductive structures are in contact with the shaft core to conduct electricity, so that they have the function of measuring the length of the root canal. In actual operation, it is easy to have poor contact and disconnection between the conductive structure and the high-speed rotating shaft core, resulting in unstable conductivity and easy failure. Content of the Utility Model

[0003] The purpose of the utility model is to provide a nose-piece conductive mechanism and a dental handpiece to solve one or more technical problems existing in the prior art, and at least provide a beneficial choice or create conditions.

[0004] The technical solution adopted to solve the above technical problems:

[0005] The utility model provides a nose-piece conductive mechanism, including:

[0006] A nose-piece housing;

[0007] A shaft core rotatably installed in the nose-piece housing;

[0008] A conductive structure fixedly installed in the nose-piece housing. The conductive structure includes a plurality of elastic conductive members. The plurality of elastic conductive members are annularly spaced on the outer peripheral side of the shaft core, and the plurality of elastic conductive members are elastically electrically contacted with the outer peripheral wall of the shaft core.

[0009] The beneficial effect of the utility model is:

[0010] The conductive structure of the utility model improves the stability of electrical contact through elastic electrical contact between a plurality of elastic conductive members and the outer peripheral wall of the shaft core. When the shaft core rotates at a high speed, if deflection occurs, no matter which direction it deviates outward, it can ensure that there is an elastic conductive member forming electrical conduction with the shaft core, avoiding poor contact and disconnection between the conductive structure and the high-speed rotating shaft core.

[0011] As a further improvement of the above technical solution, the conductive structure includes a conductive sleeve fixedly sleeved inside the head housing. The conductive sleeve is sleeved on the outer peripheral side of the shaft core, and a plurality of the elastic conductive members are connected to the conductive sleeve.

[0012] In this solution, the conductive sleeve supports and fixes the plurality of elastic conductive members. The elastic conductive members are electrically connected to the head housing through the conductive sleeve, thereby realizing the electrical connection between the shaft core and the head housing and transmitting the resistance value to the tail. In addition, during installation, after the conductive sleeve is fixedly installed, the shaft core is passed through the conductive sleeve for installation. At this time, the plurality of elastic conductive members hold the shaft core, which is convenient for assembly.

[0013] As a further improvement of the above technical solution, the elastic conductive member is a spring piece bent and extending along the axial direction.

[0014] The elastic conductive member in this solution adopts a spring piece structure, and the spring piece structure bends and extends along the axial direction of the shaft core. It can be understood that the bent spring piece elastically contacts the outer peripheral wall of the shaft core.

[0015] As a further improvement of the above technical solution, one end of the spring piece is connected to the conductive sleeve, and the other end extends obliquely inward and elastically electrically contacts the outer peripheral wall of the shaft core.

[0016] In this solution, the spring piece extending obliquely inward elastically contacts the outer peripheral wall of the shaft core, and the inclined spring piece forms an elastic force for resetting inward, ensuring more stable contact with the outer peripheral wall of the shaft core.

[0017] As a further improvement of the above technical solution, the spring piece includes a connecting section and a bending section connected in sequence. The connecting section extends along the axial direction and is connected to the conductive sleeve, and the bending section is inclined inward.

[0018] As a further improvement of the above technical solution, rotating bearings are sleeved at both ends of the shaft core, and one of the rotating bearings is sleeved inside the conductive sleeve. The shaft core is installed in the head housing through two rotating bearings, and the conductive sleeve is sleeved in a relatively rotating manner with one of the rotating bearings. It can be understood that the conductive sleeve is fixedly sleeved inside the head housing, and the rotating bearing is rotatably installed inside the conductive sleeve, and the shaft core is rotatably arranged relative to the conductive sleeve, which can make the structure more compact.

[0019] As a further improvement of the above technical solution, a first gear is provided on the outer periphery of the shaft core between the two rotating bearings. A first transmission shaft with an axis at an angle to the shaft core is installed inside the head housing, and a second gear meshing with the first gear is connected to one end of the first transmission shaft.

[0020] The first transmission shaft of this solution meshes with the first gear on the shaft core through the second gear to achieve the transmission between the shaft core and the first transmission shaft. The first gear is arranged between two rotating bearings, which can improve the rotational stability of the shaft core.

[0021] As a further improvement of the above technical solution, the first transmission shaft is perpendicularly arranged with respect to the shaft core, and the second gear is of a bevel gear structure.

[0022] As a further improvement of the above technical solution, a second transmission shaft with an axis arranged at an angle with the first transmission shaft is installed inside the headstock housing, and a bevel gear set is provided between the second transmission shaft and the other end of the first transmission shaft.

[0023] The present utility model also provides a dental handpiece, which includes the headstock conductive mechanism described above. Description of the Drawings

[0024] The following further describes the present utility model in conjunction with the drawings and embodiments;

[0025] Figure 1 It is a sectional view of one embodiment of the headstock conductive mechanism provided by the present utility model;

[0026] Figure 2 It is an exploded view of one embodiment of the headstock conductive mechanism provided by the present utility model;

[0027] Figure 3 It is an exploded view of one embodiment of the shaft core and the conductive structure provided by the present utility model. Detailed Description of the Embodiment

[0028] This part will describe in detail the specific embodiments of the present utility model. The preferred embodiments of the present utility model are shown in the drawings. The role of the drawings is to supplement the description in the text part of the specification, enabling people to intuitively and vividly understand each technical feature and the overall technical solution of the present utility model, but it cannot be understood as a limitation on the protection scope of the present utility model.

[0029] In the description of the present utility model, it should be understood that for the orientation description, such as the orientation or positional relationship indicated by up, down, front, back, left, right, etc., is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model.

[0030] In the description of the present utility model, if there are descriptions with words such as "several", its meaning is one or more, and the meaning of multiple is more than two. Understanding greater than, less than, exceeding, etc. does not include the present number, and understanding above, below, within, etc. includes the present number.

[0031] In the description of the present utility model, unless otherwise clearly defined, terms such as "set", "installed", "connected", etc. should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above terms in the present utility model in combination with the specific content of the technical solution.

[0032] Referring to Figures 1 to 3 , the following embodiments are made for the nose conductive mechanism of the present utility model:

[0033] As Figure 1 shown, the nose conductive mechanism of this embodiment includes a nose shell 100, a shaft core 200, and a conductive structure 300.

[0034] In this embodiment, the shaft core 200 is rotatably installed in the nose shell 100. The nose shell 100 includes a head 110 and a handle 120 that are connected to each other. The head 110 is provided with a first installation cavity 111. The shaft core 200 is rotatably installed in the first installation cavity 111. The first installation cavity 111 is arranged in a through manner along the axial direction of the shaft core 200. The handle 120 is provided with a second installation cavity 121. The second installation cavity 121 communicates with the first installation cavity 111. A first transmission shaft 1211 is installed in the second installation cavity 121. The first transmission shaft 1211 is in transmission connection with the shaft core 200.

[0035] Among them, the first transmission shaft 1211 is arranged at an angle with the shaft core 200. A first gear 210 is sleeved on the outer periphery of the shaft core 200 in this embodiment. One end of the first transmission shaft 1211 is provided with a second gear 1212. The second gear 1212 meshes with the first gear 210. The first transmission shaft 1211 meshes with the first gear 210 on the shaft core 200 through the second gear 1212 to realize the transmission between the shaft core 200 and the first transmission shaft 1211.

[0036] Furthermore, the handle 120 is further provided with a third installation cavity 122. The third installation cavity 122 communicates with the end of the second installation cavity 121 far from the second installation cavity 121. A second transmission shaft 1221 is arranged in the third installation cavity 122. The second transmission shaft 1221 is arranged at an angle with the first transmission shaft 1211. A bevel gear set 123 is provided between the other end of the second transmission shaft 1221 and the first transmission shaft 1211.

[0037] The first transmission shaft 1211 of this embodiment is arranged perpendicular to the shaft core 200, and the second gear 1212 is a bevel gear structure.

[0038] During use, the second transmission shaft 1221 drives the first transmission shaft 1211 to rotate, and the first transmission shaft 1211 drives the shaft core 200 to rotate.

[0039] As Figure 1 and Figure 3As shown, the conductive structure 300 is fixedly installed inside the machine head housing 100. Specifically, the conductive structure 300 includes a plurality of elastic conductive members 310 disposed in the first installation cavity 111. The plurality of elastic conductive members 310 are annularly spaced apart on the outer peripheral side of the shaft core 200, and the plurality of elastic conductive members 310 are elastically electrically contacted with the outer peripheral wall of the shaft core 200.

[0040] In the conductive structure 300 of this embodiment, the plurality of elastic conductive members 310 are elastically electrically contacted with the outer peripheral wall of the shaft core 200 to improve the stability of electrical contact. When the shaft core 200 rotates at a high speed, if there is a deflection phenomenon, no matter which direction it deviates outward, it can be ensured that there is an elastic conductive member 310 forming electrical conduction with the shaft core 200, avoiding the phenomenon of poor contact and disconnection between the conductive structure 300 and the shaft core 200 rotating at a high speed.

[0041] Among them, the conductive structure 300 further includes a conductive sleeve 320 fixedly sleeved inside the machine head housing 100. The conductive sleeve 320 is sleeved on the outer peripheral side of the shaft core 200. The plurality of elastic conductive members 310 are connected to the conductive sleeve 320. The conductive sleeve 320 supports and fixes the plurality of elastic conductive members 310. The elastic conductive members 310 are electrically conducted with the machine head housing 100 through the conductive sleeve 320, thereby realizing the electrical conduction between the shaft core 200 and the machine head housing 100 and transmitting the resistance value to the tail. In addition, during installation, after the conductive sleeve 320 is fixedly installed, the shaft core 200 is passed through the conductive sleeve 320 for installation. At this time, the plurality of elastic conductive members 310 hold the shaft core 200, which is convenient for assembly.

[0042] As Figure 3 shown, the elastic conductive member 310 of this embodiment is a spring piece bent and extended along the axial direction. The elastic conductive member 310 adopts a spring piece structure, and the spring piece structure is bent and extended along the axial direction of the shaft core 200. It can be understood that the bent spring piece is elastically contacted with the outer peripheral wall of the shaft core 200.

[0043] One end of the spring piece is connected to the conductive sleeve 320, and the other end extends obliquely inward and is elastically electrically contacted with the outer peripheral wall of the shaft core 200. In this embodiment, the spring piece extending obliquely inward is elastically contacted with the outer peripheral wall of the shaft core 200, and the inclined spring piece forms a restoring force inward to ensure more stable contact with the outer peripheral wall of the shaft core 200.

[0044] Specifically, the spring piece includes a connecting section 311 and a bending section 312 connected in sequence. The connecting section 311 extends along the axial direction and is connected to the conductive sleeve 320, while the bending section 312 is inclined inward.

[0045] Furthermore, rotating bearings 220 are sleeved on both ends of the shaft core 200. One of the rotating bearings 220 is sleeved inside the conductive sleeve 320. The shaft core 200 is installed on the machine head housing 100 through the two rotating bearings 220. The conductive sleeve 320 is sleeved in a relatively rotatable manner with one of the rotating bearings 220. It can be understood that the conductive sleeve 320 is fixedly sleeved in the first installation cavity 111, the rotating bearing 220 is rotatably installed inside the conductive sleeve 320, and the shaft core 200 is rotatably arranged relative to the conductive sleeve 320, which can make the structure more compact.

[0046] Both the conductive sleeve 320 and the machine head housing 100 are made of conductive materials to achieve electrical conduction.

[0047] In this embodiment, the first gear 210 is arranged between the two rotating bearings 220 to improve the rotational stability of the shaft core 200.

[0048] Such as Figure 1 and 2 As shown, a top cover 1111 is installed at one end of the first installation cavity 111. During assembly, the first gear 210 is pre-fixed on the shaft core 200. The shaft core 200 and the first gear 210 can be integrally formed. Then, the two rotating bearings 220 are installed at both ends of the shaft core 200. After that, they are sleeved together in the first installation cavity 111. Finally, the top cover 1111 is covered. A limiting step 1112 for abutting against the other rotating bearing 220 is provided in the first installation cavity 111.

[0049] The present utility model also provides a dental handpiece, which includes the above-mentioned machine head conductive mechanism.

[0050] The above has specifically described the preferred embodiments of the present utility model, but the present invention is not limited to the above embodiments. Those skilled in the art can also make various equivalent variations or substitutions without departing from the spirit of the present utility model. These equivalent variations or substitutions are all included in the scope defined by the claims of this application.

Claims

1. A nose conductive mechanism, characterized in that, Comprising: A machine head housing (100); A shaft core (200), rotatably mounted on the machine head housing (100); A conductive structure (300), fixedly mounted on the machine head housing (100), the conductive structure (300) includes a plurality of elastic conductive members (310), and the plurality of elastic conductive members (310) are annularly spaced on the outer peripheral side of the shaft core (200), and the plurality of elastic conductive members (310) are elastically electrically contacted with the outer peripheral wall of the shaft core (200).

2. The machine head conductive mechanism according to claim 1, wherein: The conductive structure (300) includes a conductive sleeve (320) fixedly sleeved in the machine head housing (100), the conductive sleeve (320) is sleeved on the outer peripheral side of the shaft core (200), and the plurality of elastic conductive members (310) are connected to the conductive sleeve (320).

3. The machine head conductive mechanism according to claim 2, wherein: The elastic conductive member (310) is a spring piece bent and extended axially.

4. The machine head conductive mechanism according to claim 3, wherein: One end of the spring piece is connected to the conductive sleeve (320), and the other end extends obliquely inward and is elastically electrically contacted with the outer peripheral wall of the shaft core (200).

5. The machine head conductive mechanism according to claim 4, wherein: The spring piece includes a connecting section (311) and a bending section (312) connected in sequence, the connecting section (311) extends axially and is connected to the conductive sleeve (320), and the bending section (312) extends obliquely inward.

6. The machine head conductive mechanism according to claim 2, wherein: Rotating bearings (220) are sleeved at both ends of the shaft core (200), and one of the rotating bearings (220) is sleeved in the conductive sleeve (320).

7. The machine head conductive mechanism according to claim 6, wherein: A first gear (210) is provided on the outer periphery of the shaft core (200) between the two rotating bearings (220), a first transmission shaft (1211) with an axis arranged at an angle to the shaft core (200) is installed inside the machine head housing (100), and a second gear (1212) meshing with the first gear (210) is connected to one end of the first transmission shaft (1211).

8. The machine head conductive mechanism according to claim 7, wherein: The first transmission shaft (1211) is perpendicular to the shaft core (200), and the second gear (1212) is a bevel gear structure.

9. The machine head conductive mechanism according to claim 7, wherein: A second transmission shaft (1221) with an axis arranged at an angle to the first transmission shaft (1211) is installed inside the machine head housing (100), and a bevel gear set (123) is provided between the other end of the first transmission shaft (1211) and the second transmission shaft (1221).

10. A dental handpiece, characterized in that: It includes the machine head conductive mechanism according to any one of claims 1 to 9.

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