Dental handpiece head clamping device and dental handpiece

Abstract

The utility model relates to a dental handpiece head clamping device. The dental handpiece head clamping device comprises a shell, a main shaft, a clamping sleeve, a locking column and a self-locking sleeve, a process hole is formed in the first end of the main shaft, a plurality of elastic clamping pieces are arranged at one end of the clamping sleeve, the elastic clamping pieces can move towards the direction of the center line of the clamping sleeve, and the elastic clamping pieces are located in the process hole. A plurality of radial holes are formed in the first end of the main shaft in the radial direction of the main shaft. The locking column is arranged in the radial hole, and the locking column can slide along the radial hole and abut against the elastic clamping piece. A self-locking hole is formed in the self-locking sleeve in the axial direction of the self-locking sleeve, the self-locking sleeve is arranged at the first end of the main shaft in a sleeving mode through the self-locking hole, the inner wall of the self-locking hole has a certain taper, and when the self-locking sleeve slides along the main shaft, the locking column can move towards the elastic clamping piece under extrusion of the inner wall of the self-locking hole. As long as the bur can be arranged in the clamping sleeve, the bur can be clamped by the elastic clamping piece at the end part of the clamping sleeve, and finally, the bur of the low-speed dental handpiece can be used for clamping the bur of the high-speed dental handpiece.

Description

Technical Field

[0001] The utility model relates to the field of medical instruments, in particular to a dental handpiece head clamping device and a dental handpiece. Background Art

[0002] Dental handpieces are one of the most commonly used dental instruments in the dental industry. They typically utilize a power source to rotate the bur. Handpieces are categorized as high-speed or low-speed based on the bur's rotational speed. The bur diameter of a high-speed handpiece is typically 1.6mm, while that of a low-speed handpiece is typically 2.35mm. In existing technology, the clamping device of a low-speed handpiece is generally unable to clamp the bur of a high-speed handpiece, resulting in the handpiece head clamp being incompatible with burs of varying diameters. Utility Model Content

[0003] (1) Technical issues to be resolved

[0004] The utility model provides a dental handpiece head clamping device and a dental handpiece, aiming to solve the problem in the prior art that the clamping device of a low-speed dental handpiece head cannot be used for a high-speed dental handpiece needle.

[0005] (2) Technical solution

[0006] In order to solve the above problems, the utility model provides a dental handpiece head clamping device, which includes: a housing, a main shaft, a sleeve, a locking column and a self-locking sleeve;

[0007] The main shaft is rotatably mounted in the housing, a process hole is provided at the first end of the main shaft, and a plurality of mutually independent elastic clips are provided in an annular array at one end of the jacket. The elastic clips are capable of moving toward the center line of the jacket, and the elastic clips are located in the process hole;

[0008] A plurality of radial holes are provided at the first end of the main shaft along the radial direction of the main shaft, and the radial holes correspond to the elastic clips one by one;

[0009] The locking post is disposed in the radial hole, and the locking post can slide along the radial hole and abut against the elastic clip;

[0010] A self-locking hole is provided on the self-locking sleeve along its own axial direction. The self-locking sleeve is sleeved on the first end of the main shaft through the self-locking hole. The inner wall of the self-locking hole has a certain taper. When the self-locking sleeve slides along the main shaft, the locking column can move toward the elastic clip under the pressure of the inner wall of the self-locking hole.

[0011] A retaining ring is protruded from one end of the self-locking sleeve, and a first elastic member is sleeved on the main shaft. The first end of the first elastic member abuts against the first side of the retaining ring, and the second end of the first elastic member abuts against the housing.

[0012] Preferably, the main shaft sleeve is provided with a retaining ring, the retaining ring is fixed in the housing, and the second end of the first elastic member abuts against the retaining ring.

[0013] Preferably, the dental handpiece clamping device further comprises an adjustment sleeve;

[0014] The adjusting sleeve is fixedly arranged in the outer shell, and the self-locking sleeve is located in the adjusting sleeve. The adjusting sleeve is provided with an arc groove, and an inner sleeve is slidably arranged in the adjusting sleeve. The inner sleeve abuts against the second side of the retaining ring, and an annular groove is correspondingly provided on the outer wall of the inner sleeve facing the arc groove. Balls are slidably arranged in the annular groove and the arc groove.

[0015] The outer shell includes a rotatable rotating part, the adjusting sleeve is located in the rotating part, and a rolling groove is provided on the inner wall of the rotating part along the axial direction of the main shaft. The ball part is located in the rolling groove. Rotating the rotating part can drive the inner sleeve to move along the axial direction of the main shaft through the ball.

[0016] Preferably, the housing further comprises a sealing portion and a hand-held portion;

[0017] Both ends of the adjusting sleeve are connected to the sealing portion and the hand-held portion respectively through threaded connection, and the rotating portion is located between the sealing portion and the hand-held portion.

[0018] Preferably, a plurality of convex strips are provided in a ring array on the outer side wall of the rotating part, and a plurality of anti-slip grooves are provided on the outer surface of the hand-held part.

[0019] Preferably, a connecting sleeve connected to the power assembly is provided at the second end of the main shaft, and a clamping groove is provided on the end surface of the connecting sleeve away from the main shaft.

[0020] Preferably, the connecting sleeve is sleeved on the main shaft, and a second elastic member is further provided at the second end of the main shaft, one end of the second elastic member abuts against the main shaft, and the other end of the second elastic member abuts against the connecting sleeve;

[0021] A transmission hole is provided at the first end of the main shaft along its own radial direction, a limiting shaft is provided in the transmission hole, and both ends of the limiting shaft are located outside the transmission hole; a strip hole is provided on the connecting sleeve along the axial direction of the main shaft, and the transmission shaft is located in the strip hole.

[0022] Preferably, the first elastic member is a spring or an elastic sleeve.

[0023] Preferably, the present invention further provides a dental handpiece, characterized in that the dental handpiece comprises a power assembly, a bur and the above-mentioned dental handpiece head clamping device;

[0024] The power assembly is located in the housing and is connected to the main shaft. The power assembly can drive the main shaft to rotate. The needle is located in the jacket. The elastic clip in the jacket can clamp the needle.

[0025] (3) Beneficial effects

[0026] The utility model can install the needle in the sleeve as long as the diameter of the needle is smaller than the inner diameter of the sleeve, and then an elastic clip with elasticity is provided at the end of the sleeve to clamp the needle, thereby finally realizing that a low-speed dental mobile phone can clamp the needle of a high-speed dental mobile phone. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 This is a schematic diagram of the overall structure of the dental handpiece clamping device of the present invention;

[0028] Figure 2 This is an exploded view of the dental handpiece clamping device of the present invention;

[0029] Figure 3 for Figure 2 Enlarged view at point A;

[0030] Figure 4 This is a schematic structural diagram of the main shaft, jacket, locking column, self-locking sleeve and adjusting sleeve in the utility model;

[0031] Figure 5 for Figure 4 Enlarged view at point B;

[0032] Figure 6 This is an exploded view of the main shaft, jacket, locking column, self-locking sleeve and adjusting sleeve in the utility model;

[0033] Figure 7 A schematic structural diagram of the rotating part of the utility model.

[0034] [Description of Reference Numerals]

[0035] 10: Housing; 101: Rotating part; 102: Sealing part; 103: Handle part; 104: Rolling groove; 105: Raised strip; 106: Anti-slip groove;

[0036] 11: Main shaft; 111: Process hole; 112: Radial hole; 113: First elastic member; 114: Retaining ring; 115: Connecting sleeve; 1151: Slot; 1152: Strip hole; 116: Second elastic member; 117: Transmission hole; 118: Limiting shaft;

[0037] 12: Jacket; 121: Elastic clip;

[0038] 13: Locking column;

[0039] 14: Self-locking sleeve; 141: Self-locking hole; 142: Retaining ring;

[0040] 15: Adjusting sleeve; 151: Arc groove; 152: Inner sleeve; 153: Ball; 154: Annular groove;

[0041] 20: Needle. DETAILED DESCRIPTION

[0042] In order to better explain the present invention and facilitate understanding, the present invention is described in detail below through specific implementation methods in conjunction with the accompanying drawings.

[0043] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present invention are only used to explain the relative position relationship, movement status, etc. between the various components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0044] In addition, the terms "first," "second," and so on, used in this utility model are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, features specified as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of this utility model, "plurality" means at least two, such as two, three, etc., unless otherwise specifically defined.

[0045] In this utility model, unless otherwise specified or limited, the terms "connection" and "fixation" should be understood in a broad sense. For example, "fixation" can mean fixed connection, detachable connection, or integration; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; internal communication between two elements or interaction between two elements, unless otherwise specified. For those skilled in the art, the specific meanings of the above terms in this utility model can be understood according to specific circumstances.

[0046] The utility model provides a dental handpiece head clamping device, which includes: a housing 10, a main shaft 11, a sleeve 12, a locking column 13, and a self-locking sleeve 14. The main shaft 11 is rotatably mounted in the housing 10. A process hole 111 is provided at the first end of the main shaft 11. One end of the sleeve 12 is provided with a plurality of mutually independent elastic clips 121 in an annular array. The elastic clips 121 can move toward the center line direction of the sleeve 12. The elastic clips 121 are located in the process hole 111. A plurality of radial holes 112 are provided at the first end of the main shaft 11 along the radial direction of the main shaft 11. The radial holes 112 correspond one-to-one to the elastic clips 121. The locking column 13 is disposed in the radial hole 112, and the locking column 13 can slide along the radial hole 112 and abut against the elastic clips 121. A self-locking hole 141 is provided on the self-locking sleeve 14 along its own axial direction. The self-locking sleeve 14 is sleeved on the first end of the main shaft 11 through the self-locking hole 141. The inner wall of the self-locking hole 141 has a certain taper. When the self-locking sleeve 14 slides along the main shaft 11, the locking column 13 can move toward the elastic clip 121 under the pressure of the inner wall of the self-locking hole 141.

[0047] In this invention, the jacket 12 is a cylindrical object with open ends. The needle 20 is positioned within the jacket 12. A self-locking sleeve 14 slides over the jacket 12, and an elastic clip 121 within the jacket 12, activated by a locking post 13, secures the needle 20. In this solution, as long as the diameter of the needle 20 is smaller than the inner diameter of the jacket 12, the needle 20 can fit within the jacket 12. Elastic clips 121 are then positioned at the ends of the jacket 12 to secure the needle 20. Ultimately, a single jacket 12 can secure a needle 20 up to a 1.6-gauge gauge.

[0048] Furthermore, a retaining ring 142 is protruding from one end of the self-locking sleeve 14, and a first elastic member 113 is sleeved on the main shaft 11. The first end of the first elastic member 113 abuts against the first side of the retaining ring 142, and the second end of the first elastic member 113 abuts against the housing 10. The main shaft 11 is sleeved with a retaining ring 114, which is fixed in the housing 10, and the second end of the first elastic member 113 abuts against the retaining ring 114. The first elastic member 113 is a spring or an elastic sleeve. In this embodiment, the self-locking sleeve 14 can always have a tendency to move toward the first end of the main shaft 11 under the action of the first elastic member 113. The self-locking hole 141 on the self-locking sleeve 14 can push the locking column 13 toward the central axis, and the locking column 13 can push the elastic clips 121 closer to each other, thereby clamping the needle 20.

[0049] Furthermore, the dental handpiece clamping device further includes an adjustment sleeve 15. The adjustment sleeve 15 is fixedly disposed within the housing 10, and the self-locking sleeve 14 is located within the adjustment sleeve 15. The adjustment sleeve 15 is provided with an arcuate groove 151. An inner sleeve 152 is slidably disposed within the adjustment sleeve 15. The inner sleeve 152 abuts against the second side of the retaining ring 142. An annular groove 154 is correspondingly disposed on the outer wall of the inner sleeve 152 facing the arcuate groove 151. Ball bearings 153 are slidably disposed within the annular groove 154 and the arcuate groove 151.

[0050] The outer shell 10 includes a rotatable rotating part 101, the adjusting sleeve 15 is located in the rotating part 101, and a rolling groove 104 is provided on the inner wall of the rotating part 101 along the axial direction of the main shaft 11. The ball 153 is partially located in the rolling groove 104. Rotating the rotating part 101 can enable the ball 153 to drive the inner sleeve 152 to move along the axial direction of the main shaft 11.

[0051] In this embodiment, rotating portion 101 rotates, driving ball bearings 153 via grooves 104. During this rotation, ball bearings 153 move along the arcuate grooves 151 on adjustment sleeve 15, thereby driving inner sleeve 152 to move axially along spindle 11. During this process, the rotation of rotating portion 101 about the centerline of spindle 11 is converted by ball bearings 153 into axial movement of inner sleeve 152 along spindle 11. When inner sleeve 152 moves away from the first end of spindle 11, it pushes self-locking sleeve 14 toward the first end away from spindle 11. The locking post 13 is no longer subject to pressure from self-locking sleeve 14, and the elastic clip 121 releases the drive pin 20. When the inner sleeve 152 moves toward the first end of the spindle 11, the first elastic member 113 pushes the self-locking sleeve 14 toward the first end of the spindle 11. The locking post 13 is pressed by the self-locking sleeve 14, and the elastic clip 121 in the collet 12 is able to clamp the needle 20 under the action of the locking post 13. In other words, in this embodiment, the force that clamps the needle 20 with the elastic clip 121 comes from the elastic force of the first elastic member 113.

[0052] The present application can also be implemented in another way, that is, when the inner sleeve 152 moves toward the first end of the main shaft 11, the inner sleeve 152 can push the self-locking sleeve 14 to move toward the first end of the main shaft 11, the locking column 13 is subjected to the pressure of the self-locking sleeve 14, and the elastic clip 121 in the jacket 12 can clamp the needle 20 under the action of the locking column 13. When the inner sleeve 152 moves away from the first end of the main shaft 11, the first elastic member 113 can drive the self-locking sleeve 14 to move away from the first end of the main shaft 11, the locking column 13 is not subjected to the pressure of the self-locking sleeve 14, and the elastic clip 121 releases the needle 20. That is, in this solution, the force of the elastic clip 121 clamping the needle 20 comes from the inner sleeve 152.

[0053] It can be seen from the above description that the needle 20 can be clamped or loosened by changing the rotation direction of the rotating portion 101 on the housing 10 .

[0054] The housing 10 also includes a sealing portion 102 and a handle 103. The ends of the adjustment sleeve 15 are connected to the sealing portion 102 and the handle 103 via threads, respectively. The rotating portion 101 is located between the sealing portion 102 and the handle 103. In this embodiment, the adjustment sleeve 15, the sealing portion 102, and the handle 103 are all connected via threads, facilitating disassembly and subsequent maintenance.

[0055] In a preferred embodiment, a plurality of ridges 105 are provided in an annular array on the outer wall of the rotating portion 101 , and a plurality of anti-slip grooves 106 are provided on the outer surface of the handle portion 103 .

[0056] A connecting sleeve 115 connected to a motor is provided at the second end of the main shaft 11, and a clamping groove 1151 is provided on the end surface of the connecting sleeve 115 away from the main shaft 11. The motor is an electric motor or a pneumatic motor.

[0057] A connecting sleeve 115 is sleeved onto the main shaft 11. A second elastic member 116 is also provided at the second end of the main shaft 11. One end of the second elastic member 116 abuts the main shaft 11, while the other end of the second elastic member 116 abuts the connecting sleeve 115. A transmission hole 117 is provided radially through the first end of the main shaft 11. A limit shaft 118 is provided within the transmission hole 117, with both ends of the limit shaft 118 located outside the transmission hole 117. A strip-shaped hole 1152 is provided in the connecting sleeve 115 along the axial direction of the main shaft 11, and the transmission shaft is located within the strip-shaped hole 1152.

[0058] Finally, the present invention also provides a dental handpiece, comprising a power assembly, a needle 20, and the aforementioned dental handpiece head clamping device. The power assembly is located within a housing 10 and is connected to a spindle 11, driving the spindle 11 to rotate. The needle 20 is located within a jacket 12, and an elastic clip 121 within the jacket 12 is capable of clamping the needle 20.

[0059] It should be understood that the above description of the specific embodiments of the present invention is merely for the purpose of illustrating the technical approach and features of the present invention. Its purpose is to enable those skilled in the art to understand the contents of the present invention and implement them accordingly. However, the present invention is not limited to the above-described specific embodiments. Any changes or modifications made within the scope of the claims of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A dental handpiece clamping device, characterized in that: The dental handpiece head clamping device comprises: a housing (10), a main shaft (11), a clamping sleeve (12), a locking column (13) and a self-locking sleeve (14); The main shaft (11) is rotatably mounted in the housing (10); a process hole (111) is provided at a first end of the main shaft (11); a plurality of mutually independent elastic clips (121) are provided in an annular array at one end of the jacket (12); the elastic clips (121) are capable of moving toward the center line of the jacket (12); and the elastic clips (121) are located in the process hole (111); A plurality of radial holes (112) are provided at the first end of the main shaft (11) along the radial direction of the main shaft (11), and the radial holes (112) correspond one-to-one to the elastic clips (121); The locking column (13) is arranged in the radial hole (112), and the locking column (13) can slide along the radial hole (112) and abut against the elastic clip (121); The self-locking sleeve (14) is provided with a self-locking hole (141) along its own axial direction. The self-locking sleeve (14) is sleeved on the first end of the main shaft (11) through the self-locking hole (141). The inner wall of the self-locking hole (141) has a taper. When the self-locking sleeve (14) slides along the main shaft (11), the locking column (13) can move toward the elastic clip (121) under the pressure of the inner wall of the self-locking hole (141).

2. The dental handpiece clamping device according to claim 1, wherein: A retaining ring (142) is protruding from one end of the self-locking sleeve (14), and a first elastic member (113) is sleeved on the main shaft (11), wherein a first end of the first elastic member (113) abuts against a first side of the retaining ring (142), and a second end of the first elastic member (113) abuts against the housing (10).

3. The dental handpiece clamping device according to claim 2, wherein: A retaining ring (114) is sleeved on the main shaft (11), the retaining ring (114) is fixed in the housing (10), and the second end of the first elastic member (113) abuts against the retaining ring (114).

4. The dental handpiece clamping device according to claim 2, wherein: The dental handpiece clamping device further comprises an adjustment sleeve (15); The adjusting sleeve (15) is fixedly arranged in the housing (10), and the self-locking sleeve (14) is located in the adjusting sleeve (15); an arc-shaped groove (151) is provided on the adjusting sleeve (15); an inner sleeve (152) is slidably provided in the adjusting sleeve (15); the inner sleeve (152) abuts against the second side of the retaining ring (142); an annular groove (154) is correspondingly provided on the outer wall of the inner sleeve (152) facing the arc-shaped groove (151); balls (153) are slidably provided in the annular groove (154) and the arc-shaped groove (151); The housing (10) includes a rotatable rotating portion (101), the adjusting sleeve (15) is located in the rotating portion (101), a rolling groove (104) is provided on the inner wall of the rotating portion (101) along the axial direction of the main shaft (11), and the ball (153) is partially located in the rolling groove (104). Rotating the rotating portion (101) can drive the inner sleeve (152) to move along the axial direction of the main shaft (11) through the ball (153).

5. The dental handpiece clamping device according to claim 4, wherein: The housing (10) further comprises a sealing portion (102) and a hand-held portion (103); The two ends of the adjustment sleeve (15) are respectively connected to the sealing portion (102) and the hand-held portion (103) by means of threaded connection, and the rotating portion (101) is located between the sealing portion (102) and the hand-held portion (103).

6. The dental handpiece clamping device according to claim 5, wherein: A plurality of convex strips (105) are provided in an annular array on the outer wall of the rotating portion (101), and a plurality of anti-slip grooves (106) are provided on the outer surface of the hand-held portion (103).

7. The dental handpiece clamping device according to any one of claims 1 to 6, wherein: A connecting sleeve (115) connected to a power assembly is provided at the second end of the main shaft (11), and a clamping groove (1151) is provided on an end surface of the connecting sleeve (115) away from the main shaft (11).

8. The dental handpiece clamping device according to claim 7, wherein: The connecting sleeve (115) is sleeved on the main shaft (11), and a second elastic member (116) is further provided at the second end of the main shaft (11), one end of the second elastic member (116) abuts against the main shaft (11), and the other end of the second elastic member (116) abuts against the connecting sleeve (115); A transmission hole (117) is provided at the first end of the main shaft (11) along its own radial direction, a limiting shaft (118) is provided in the transmission hole (117), and both ends of the limiting shaft (118) are located outside the transmission hole (117); a strip hole (1152) is provided on the connecting sleeve (115) along the axial direction of the main shaft (11), and the limiting shaft (118) is located in the strip hole (1152).

9. The dental handpiece clamping device according to any one of claims 2 to 6, wherein: The first elastic member (113) is a spring or an elastic sleeve.

10. A dental handpiece, characterized in that: The dental handpiece comprises a power assembly, a needle (20) and a dental handpiece head clamping device according to any one of claims 1 to 9; The power assembly is located in the housing (10) and is connected to the main shaft (11). The power assembly can drive the main shaft (11) to rotate; the needle (20) is located in the jacket (12), and the elastic clip (121) in the jacket (12) can clamp the needle (20).

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