Dental handpiece

Abstract

The utility model discloses a dental handpiece which comprises a shell, a rotary transmission mechanism and a bur, the rotary transmission mechanism is arranged in the shell and is connected with the machine needle; the shell is provided with a water spraying structure; the dental handpiece further comprises a handle, a rear cover and a hoop, the handle is integrally formed; one end of the shell forms a machine head end, and the other end of the shell forms a mounting end; the rear cover is detachably connected with the mounting end of the shell; the hoop is sleeved on the rear cover; the handle is arranged outside the shell in a sleeving manner, and the handle is limited between the machine head end and the hoop. According to the utility model, the handle is convenient and rapid to disassemble and assemble, and the disassembly and assembly efficiency of the handle can be improved.

Description

Technical Field

[0001] The utility model relates to the field of dental handpieces, and particularly relates to a dental handpiece. Background Art

[0002] Dental handpieces are often used for cleaning and grinding teeth, and are widely used in the oral field. The existing dental handpiece includes a rotary drive mechanism, a bur, a housing and a handle. The rotary drive mechanism is installed in the housing and connected to the bur. A water spraying structure is arranged on the housing. The handle adopts a two-section structure connected by threads and is fixed outside the housing to protect the housing from being exposed through the handle. However, since the disassembly and assembly of the handle are time-consuming, the disassembly and assembly efficiency of the handle is seriously affected, which is not convenient for later detection and maintenance. Content of the Utility Model

[0003] In order to overcome the deficiencies of the prior art, the purpose of the utility model is to provide a dental handpiece, which makes the disassembly and assembly of the handle more convenient and fast, and can improve the disassembly and assembly efficiency of the handle.

[0004] The purpose of the utility model is realized by adopting the following technical solutions:

[0005] A dental handpiece includes a housing, a rotary drive mechanism and a bur. The rotary drive mechanism is installed in the housing and connected to the bur. The housing is provided with a water spraying structure. The dental handpiece further includes a handle, a rear cover and a hoop. The handle is integrally formed. One end of the housing is formed as a head end, and the other end is formed as a mounting end. The rear cover is detachably connected to the mounting end of the housing. The hoop is sleeved on the rear cover. The handle is sleeved outside the housing, and the handle is restricted between the head end and the hoop.

[0006] The handle is integrally formed with a carbon fiber material.

[0007] The rear cover is threadedly connected to the mounting end of the housing.

[0008] The rear cover is provided with a supporting portion extending circumferentially and protruding outward. One end of the hoop away from the head end abuts against the supporting portion.

[0009] A sealing ring is arranged between one end of the rear cover close to the head end and the housing.

[0010] The housing is provided with a first shoulder. The sealing ring is sleeved on the housing, and the sealing ring is arranged between one end of the rear cover close to the head end and the first shoulder.

[0011] The rear cover is provided with a second shoulder. One end of the handle away from the head end abuts against the hoop and the second shoulder.

[0012] The head end is provided with a protruding portion protruding outward, and the handle abuts against the protruding portion of the head end.

[0013] The water spraying structure includes a check valve, a conduit and a water spraying channel; the housing is provided with a water inlet and a water passing chamber; the water inlet is used for communicating with the water passing chamber; the check valve is installed in the water passing chamber; the check valve includes an elastic flap, the elastic flap has a tilted state of tilting away from the water inlet under the pressing action of the liquid flowing through the water inlet to open the water inlet, and also has a restored state of elastically resetting toward the water inlet under its own elastic force to close the water inlet; the conduit is fixed on the housing, the water spraying channel is arranged on the housing, and the water passing chamber is communicated with the water spraying channel through the lumen of the conduit.

[0014] The water inlet is used for communicating with a water supply component.

[0015] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0016] A dental handpiece provided by the present utility model, on the basis of adopting a housing, a rotary transmission mechanism and a bur, further combines a handle, a rear cover and a hoop, so that the disassembly and assembly of the handle are relatively convenient and fast, the disassembly and assembly efficiency of the handle can be improved, and it is convenient for later detection and maintenance; moreover, it can prevent the liquid from flowing back to the water inlet through the water passing chamber to prevent the occurrence of back suction phenomenon, and can reduce the manufacturing cost. Description of the Drawings

[0017] Figure 1 is a schematic structural diagram of the present utility model;

[0018] Figure 2 is an exploded schematic diagram of the present utility model;

[0019] Figure 3 is a cross-sectional view of the present utility model;

[0020] Figure 4 is Figure 3 an enlarged view of part A of

[0021] Figure 5 is Figure 3 an enlarged view of part B of

[0022] Figure 6 is a schematic diagram of the cooperation between the housing and the check valve;

[0023] Figure 7 is a schematic structural diagram of the check valve.

[0024] Among them, 100 is the housing; 110 is the water spraying structure; 111 is the water inlet; 112 is the water passage chamber; 113 is the installation chamber; 114 is the water passage; 115 is the installation end; 116 is the nose end; 117 is the first shoulder; 118 is the protruding part; 120 is the water spraying hole passage; 130 is the conduit; 200 is the check valve; 201 is the elastic flap; 203 is the valve plug body; 204 is the connecting neck; 205 is the column cavity; 206 is the fixing column; 207 is the column body; 208 is the outer convex ring body; 310 is the rotary drive mechanism; 320 is the bur; 410 is the handle; 420 is the rear cover; 421 is the supporting part; 422 is the second shoulder; 430 is the hoop; 440 is the sealing ring. Detailed implementation manner

[0025] Next, in combination with the accompanying drawings and the detailed implementation manner, the present utility model will be further described. It should be noted that, on the premise of no conflict, the following described embodiments or technical features can be arbitrarily combined to form new embodiments.

[0026] As Figure 1-7 shown, a dental handpiece includes a housing 100, a rotary drive mechanism 310 and a bur 320; the rotary drive mechanism 310 is installed in the housing 100 and is connected to the bur 320; the housing 100 is provided with a water spraying structure 110; the dental handpiece further includes a handle 410, a rear cover 420 and a hoop 430; the handle 410 is integrally formed; one end of the housing 100 forms a nose end 116, and the other end forms an installation end 115; the rear cover 420 is detachably connected to the installation end 115 of the housing 100; the hoop 430 is sleeved on the rear cover 420; the handle 410 is sleeved outside the housing 100, and the handle 410 is restricted between the nose end 116 and the hoop 430.

[0027] During use, an external power device can drive the rotary transmission mechanism 310 to work, so as to drive the dental bur 320 to rotate through the rotary transmission mechanism 310. The dental bur 320 can be used to grind and cut the tooth needle, and the tooth can be sprayed and cleaned through the water spraying structure 110. During the installation of the handle 410, the handle 410 can be sleeved outside the housing 100, and then the rear cover 420 with the hoop 430 sleeved thereon is connected to the installation end 115 of the housing 100, so that the handle 410 is restricted between the head end 116 and the hoop 430, thereby completing the fixation and installation of the handle 410. If it is necessary to disassemble the handle 410 for detecting and repairing the dental handpiece, the rear cover 420 can be disassembled from the installation end 115 of the housing 100, and then the handle 410 can be removed from the housing 100, thus completing the disassembly of the handle 410. Therefore, a dental handpiece provided by the utility model, on the basis of adopting the housing 100, the rotary transmission mechanism 310 and the dental bur 320, combines the handle 410, the rear cover 420 and the hoop 430, making the disassembly and assembly of the handle 410 more convenient and fast, and there is no need to operate on the handle 410, which can improve the disassembly and assembly efficiency of the handle 410 and is convenient for later detection and repair.

[0028] The handle 410 is integrally formed by using carbon fiber material. By integrally forming the handle 410, during the disassembly and assembly process of the handle 410, there is no need to assemble or disassemble the handle 410, which can further improve the convenience of the disassembly and assembly of the handle 410. Moreover, by integrally forming the handle 410 with carbon fiber material, its structural strength can be improved.

[0029] Preferably, the rear cover 420 is threadedly connected to the installation end 115 of the housing 100. By adopting the above connection method, the disassembly and installation between the rear cover 420 and the installation end 115 of the housing 100 can be facilitated.

[0030] Preferably, a supporting portion 421 extending along the circumferential direction of the rear cover 420 and protruding outward is provided on the rear cover 420, and one end of the hoop 430 away from the head end 116 abuts against the supporting portion 421, so that the hoop 430 can be limited by the supporting portion 421.

[0031] Preferably, a sealing ring 440 is provided between one end of the rear cover 420 close to the head end 116 and the housing 100 to improve the sealing effect. Specifically, a first shoulder 117 is provided on the housing 100, the sealing ring 440 is sleeved on the housing 100, and the sealing ring 440 is provided between one end of the rear cover 420 close to the head end 116 and the first shoulder 117.

[0032] Preferably, a second shoulder 422 is provided on the rear cover 420; the end of the handle 410 away from the nose end 116 abuts against the hoop 430 and the second shoulder 422, so that the hoop 430 and the second shoulder 422 can limit the handle 410 and facilitate processing.

[0033] Preferably, the nose end 116 is provided with a protrusion 118 protruding outward, and the handle 410 abuts against the protrusion 118 of the nose end 116, so that the protrusion 118 limits the handle 410 and facilitates processing.

[0034] The rotation transmission mechanism 310 may be any rotation transmission mechanism currently available on the market, as long as the rotational motion of an external power device can be transmitted to the needle 320 to drive the needle 320 to rotate.

[0035] The water spraying structure 110 can be any water spraying structure currently available in the market, as long as it can be used for water spraying.

[0036] As a preferred embodiment of the present utility model, the water spray structure 110 includes a check valve 200, a conduit 130 and a water spray channel 120; the shell 100 is provided with a water port 111 and a water passage chamber 112; the water port 111 is used to communicate with the water passage chamber 112; the check valve 200 is installed in the water passage chamber 112; the check valve 200 includes an elastic flap 201, the elastic flap 201 has a tilting shape that is tilted away from the water port 111 under the top pressure of the liquid flowing through the water port 111 to open the water port 111, and also has a restoring shape that is elastically reset toward the water port 111 under the action of its own elastic force to close the water port 111 to close the water port 111; the conduit 130 is fixed on the shell 100, the water spray channel 120 is arranged on the shell 100, and the water passage chamber 112 is connected with the water spray channel 120 through the tube cavity of the conduit 130. When in use, when liquid is introduced into the water port 111 by means of an external water supply component, the elastic flap 201 tilts away from the water port 111 under the top pressure of the liquid flowing through the water port 111. At this time, the sealing effect of the check valve 200 on the water port 111 is removed, so that the water port 111 is opened, and the liquid supplied by the water supply component can flow to the water passage chamber 112 through the water port 111, and flow to the water spray channel 120 through the conduit 130, and then be sprayed out through the water spray channel 120. When the water supply component stops supplying water after use, the elastic flap 201 elastically resets toward the water port 111 under the action of its own elastic force to present a restored shape. At this time, the water port 111 can be closed by the elastic flap 201 to avoid backflow due to pressure difference and prevent the liquid from flowing back to the water port 111 through the water chamber 112 to prevent back suction. Moreover, the check valve 200 has a simple structure and is easy to process, which can reduce the manufacturing cost.

[0037] Preferably, the elastic flap 201 is in the shape of a solid of revolution, so that the water inlet 111 can be completely closed in all directions through the elastic flap 201.

[0038] The check valve 200 further includes a valve plug body 203 and a connecting neck 204. The connecting neck 204 is arranged between the elastic flap 201 and the valve plug body 203. The valve plug body 203 is fixed in the water passage chamber 112. By adopting the above arrangement, the manufacture of the check valve 200 can be facilitated, and the manufacturing cost can be further reduced.

[0039] Of course, in addition to this, the structure of the check valve 200 can also be set to other according to actual needs, as long as the elastic flap 201 is adopted. However, adopting the valve plug body 203 and the connecting neck 204 for the check valve 200 is the preferred embodiment of the present invention, which can facilitate the installation of the check valve 200 and the manufacture of the check valve 200, and further reduce the manufacturing cost.

[0040] Preferably, a column cavity 205 extending in the direction of the connecting neck 204 is arranged on the valve plug body 203, and a fixing column 206 is arranged in the column cavity 205. The fixing column 206 is fixed in the water passage chamber 112. By adopting the above arrangement, the stability of the check valve 200 during use can be improved, and phenomena such as skewing and displacement of the elastic flap 201 can be avoided.

[0041] The water passage chamber 112 includes an installation cavity 113 and a water passage 114; the water passage 114 is communicated with the installation cavity 113; the check valve 200 is installed in the installation cavity 113.

[0042] Preferably, the valve plug body 203 includes a column body 207 and an outer convex ring body 208 arranged on the column body 207 and protruding outwards; the column body 207 is installed in the installation cavity 113, and the outer convex ring body 208 is in sealing cooperation with the cavity wall of the installation cavity 113. By adopting the above arrangement, the sealing performance between the check valve 200 and the installation cavity 113 can be improved.

[0043] Of course, in addition to this, the structure of the valve plug body 203 can also be set to other according to actual needs. However, adopting the column body 207 and the outer convex ring body 208 for the valve plug body 203 is the preferred embodiment of the present invention, which can improve the sealing performance between the check valve 200 and the installation cavity 113.

[0044] Preferably, the water inlet 111 is used for communicating with a water supply component, so as to facilitate the introduction of liquid into the water inlet 111 through the water supply component. Among them, the water supply component can be a water pipe or the like.

[0045] The above embodiments are only the preferred embodiments of the present utility model, and the scope of protection of the present utility model cannot be limited thereby. Any non-substantial changes and substitutions made by those skilled in the art based on the present utility model fall within the scope of protection required by the present utility model.

Claims

1. A dental handpiece, comprising a housing, a rotary drive mechanism and a bur; the rotary drive mechanism is installed in the housing and connected to the bur; the housing is provided with a water spraying structure; characterized in that: The dental handpiece further includes a handle, a rear cover and a hoop; the handle is integrally formed; one end of the housing is formed as a head end, and the other end is formed as a mounting end; the rear cover is detachably connected to the mounting end of the housing; the hoop is sleeved on the rear cover; the handle is sleeved outside the housing, and the handle is restricted between the head end and the hoop.

2. The dental handpiece according to claim 1, wherein: The handle is integrally formed with a carbon fiber material.

3. The dental handpiece according to claim 1, characterized in that: The rear cover is threadedly connected to the mounting end of the housing.

4. The dental handpiece according to claim 3, characterized in that: A supporting portion extending circumferentially along the rear cover and protruding outward is provided on the rear cover, and one end of the hoop away from the head end abuts against the supporting portion.

5. The dental handpiece according to any one of claims 1 to 4, characterized in that: A sealing ring is provided between one end of the rear cover close to the head end and the housing.

6. The dental handpiece according to claim 5, characterized in that: A first shoulder is provided on the housing, the sealing ring is sleeved on the housing, and the sealing ring is provided between one end of the rear cover close to the head end and the first shoulder.

7. The dental handpiece according to claim 5, wherein: A second shoulder is provided on the rear cover; one end of the handle away from the head end abuts against the hoop and the second shoulder.

8. The dental handpiece according to claim 1, characterized in that: A protruding portion protruding outward is provided at the head end, and the handle abuts against the protruding portion at the head end.

9. The dental handpiece according to claim 1, wherein: The water spraying structure includes a check valve, a conduit and a water spraying channel; the housing is provided with a water inlet and a water passage chamber; the water inlet is used for communicating with the water passage chamber; the check valve is installed in the water passage chamber; the check valve includes an elastic flap, the elastic flap has a tilted state of tilting away from the water inlet under the pressing action of the liquid flowing through the water inlet to open the water inlet, and also has a restored state of elastically resetting toward the water inlet under its own elastic force to close the water inlet; the conduit is fixed on the housing, the water spraying channel is provided on the housing, and the water passage chamber is communicated with the water spraying channel through the lumen of the conduit.

10. The dental handpiece according to claim 9, characterized in that: The water inlet is used for communicating with a water supply component.

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