CN219803812U

CN219803812U - Dental handpiece locking structure capable of being rapidly detached

Info

Publication number: CN219803812U
Application number: CN202320897555.5U
Authority: CN
Inventors: 王笃生; 莫荣森
Original assignee: Foshan Coxo Medical Instrument Co ltd
Current assignee: Foshan Coxo Medical Instrument Co ltd
Priority date: 2023-04-20
Filing date: 2023-04-20
Publication date: 2023-10-10
Anticipated expiration: 2033-04-20

Abstract

A dental handpiece locking structure capable of being rapidly disassembled. Relates to the technical field of dental therapeutic apparatuses. Comprises a first bayonet lock, a protruding position, a spring, a fastening nut and a positioning nut; the machine head is connected with the transmission shaft through a first bayonet lock; the utility model discloses a transmission shaft, including the casing, protruding position, spring, fastening nut and locating nut, protruding position is fixed to be located the outer wall one end of transmission shaft, spring, fastening nut and locating nut are arranged in proper order from left to right in the casing, be equipped with the step hole in the casing, the inner wall right side of casing is equipped with first U type groove, be equipped with spacer pin and helicla flute on fastening nut's the outer wall, the spacer pin slides in first U type inslot, protruding position rotates on the inside right side of casing and the adaptation is established in the helicla flute soon, the spring keeps compressed state. According to the utility model, the transmission shaft and the machine head are tensioned through the elasticity, so that the machine head is prevented from falling off due to vibration generated by the operation of the bending mobile phone.

Description

Dental handpiece locking structure capable of being rapidly detached

Technical Field

The utility model relates to the technical field of dental treatment apparatuses, in particular to a dental handpiece locking structure capable of being rapidly disassembled.

Background

The low-speed dental handpiece is generally applied to various working conditions of dental treatment, and the handpiece is required to be in contact with oral components frequently, namely, the handpiece is required to be subjected to disinfection and sterilization maintenance treatment, so that the handpiece component is required to have detachable convenience, and the fixing mode of the handpiece component of the low-speed dental handpiece is generally a screw or screw fastening mode at present; this two way approach has the following disadvantages: 1. the machine head can be disassembled after the screw rod or the screw is loosened, which is troublesome; 2. the two modes suffer from the problem that the screw thread sliding teeth are easy to lose effectiveness due to frequent disassembly, and the locking capability of the head assembly is lost; 3. the vibration of the bending mobile phone can also affect the two locking modes, so that the machine head is loosened, and as the screw is positioned at the front part of the handle of the bending mobile phone, the screw is positioned at the mouth part of a patient in operation, and once the screw is loosened, the screw falls into the body of the patient.

Disclosure of Invention

In order to overcome the defects of the prior art, the utility model provides a rapidly detachable dental handpiece locking structure which can not be loosened due to vibration.

The utility model is realized by adopting the following technical scheme: the dental handpiece locking structure comprises a first bayonet lock, a boss, a spring, a fastening nut and a positioning nut, wherein the first bayonet lock is arranged in a shell and used for locking a transmission shaft with a handpiece and the transmission shaft with the shell; the spring and the fastening nut are movably arranged, and the positioning nut can be fixedly arranged in the shell in an adhesive or interference fit mode;

the machine head is connected with the transmission shaft through a first bayonet lock; after the first bayonet lock is connected, the machine head and the transmission shaft cannot generate axial displacement, and cannot be separated from each other;

the utility model discloses a transmission shaft, including the casing, protruding position, locating nut, the protruding position is fixed to be located the outer wall one end of transmission shaft, spring, the nut and locating nut are arranged in proper order from left to right in the casing, be equipped with the step hole that from left to right internal diameter grow in the casing, the inner wall right side of casing is equipped with along the first U type groove of axis extension, be equipped with spacer pin and helicla flute on the outer wall of the nut of fastening, the spacer pin slides in first U type inslot, protruding position rotates on the inside right side of casing to the adaptation is revolved and is established in the helicla flute, locating nut is fixed to be located the inner wall right side of casing, the spring keeps compressed state.

In the technical scheme, the spring is always in a compressed state, and can always provide thrust for the fastening nut, so that the tension force of the fastening nut on the transmission shaft can be maintained, and the machine head is further ensured to be pulled and locked on the left side of the shell.

The preferable implementation mode of the utility model is that the machine head is provided with an axial inner hole and at least one radial first pin hole, the other end of the transmission shaft is provided with second pin holes corresponding to the first pin holes one by one, the other end of the transmission shaft is inserted into the inner hole, and the first bayonet lock is inserted into the overlapped first pin holes and second pin holes.

According to the technical scheme, after the transmission shaft is inserted into the inner hole, the first bayonet lock is inserted into the aligned first pin hole and second pin hole, and then the transmission shaft and the machine head can be connected.

The preferable implementation mode of the utility model is that a first step position is arranged on the machine head, a second step position is arranged at the other end of the transmission shaft, the first pin hole is positioned on the first step position, and the C-shaped bullet clamping sleeve is arranged on the first step position, supports against the first clamping pin and is contacted with the end face of the second step position.

In the technical scheme, the C-shaped spring clamp is utilized to limit the first clamping pin, so that the first clamping pin is prevented from being separated from the first pin hole and the second pin hole in the using process, and the connection reliability of the machine head and the transmission shaft is ensured.

The preferred embodiment of the utility model is that the maximum outer diameter of the second step is not smaller than the maximum outer diameter of the C-shaped bullet card.

In the technical scheme, the size of the C-shaped spring card is limited, so that the C-shaped spring card can limit the first bayonet lock and can not generate axial displacement under the influence of vibration of the bending mobile phone, and the connection reliability is further improved.

The utility model is characterized in that a second U-shaped groove extending along the axial direction is arranged on the left side of the inner wall of the shell, one end of the second U-shaped groove is communicated with the left end face of the shell, the other end of the second U-shaped groove is communicated with the connecting end face of the stepped hole, and the protruding position slides into the shell through the second U-shaped groove.

In the technical scheme, through setting up the second U type groove, for the removal of protruding position provides the space, also can avoid the casing overall dimension too big.

The preferred embodiment of the utility model is that one end of the first U-shaped groove is communicated with the joint end face of the step hole, the other end of the first U-shaped groove is communicated with the right end face of the shell, and the fastening nut slides into the shell through the first U-shaped groove.

According to the technical scheme, the first U-shaped groove is arranged, so that space is provided for movement of the limiting pin, and the fastening nut can be prevented from rotating in the shell.

A preferred embodiment of the present utility model is that the outer diameter of the spring is larger than the inner diameter of the left side portion of the stepped hole.

In the technical scheme, the spring is limited on the right side of the inside of the shell, and can generate a certain amount of return when the compression state is kept all the time, so that enough elastic tension is provided for the transmission shaft, and the machine head is locked on the shell.

The preferable implementation mode of the utility model is that the machine head is also provided with at least one axial third pin hole, the left end face of the shell is provided with fourth pin holes which are in one-to-one correspondence with the third pin holes, and a second bayonet lock is inserted between the bottom of the third pin holes and the bottom of the fourth pin holes.

In the technical scheme, one end of the second bayonet lock is located in the third pin hole, and the other end of the second bayonet lock is located in the fourth pin hole, so that the machine head can be reliably prevented from rotating, and the connection reliability is further improved.

The preferred embodiment of the utility model is that the protruding positions are integrally formed with the transmission shaft or inserted into the transmission shaft, and the number of the second U-shaped grooves is consistent with that of the protruding positions.

In the technical scheme, the protruding potential energy moves in the second U-shaped groove in a one-to-one correspondence manner.

In a preferred embodiment of the present utility model, one end of the spiral groove is communicated with the left end face of the fastening nut, the other end of the spiral groove is close to the right end face of the positioning nut, and the limiting pin is located outside the spiral groove.

In the technical scheme, the protruding potential energy is screwed in from one end of the spiral groove and limited at the other end of the spiral groove, so that the further compression effect on the spring is realized, and after the machine head is loosened, enough elastic force can be used for fastening the machine head.

Compared with the prior art, the utility model has the beneficial effects that:

1. the bulge position is rotated into the fastening nut to realize the displacement of the fastening nut and the further compression of the spring, and then the spring returns to drive the transmission shaft and the machine head to generate axial displacement, so that the machine head is tightly attached to the shell, the reliable fixing of the machine head is realized, the purpose of quick disassembly is realized through reverse operation, and the transmission shaft and the machine head are tensioned through elasticity, so that the machine head is prevented from falling off due to vibration generated by the operation of a bent mobile phone;

2. and a third pin hole on the machine head can be sleeved into the second bayonet lock in the process that the machine head is attached to the shell, so that the connection reliability of the machine head and the shell is further improved, and the machine head is prevented from rotating after being locked.

Drawings

FIG. 1 is an engineering assembly drawing of the present utility model;

FIG. 2 is an exploded schematic view of the present utility model;

FIG. 3 is a second schematic explosion diagram of the present utility model;

FIG. 4 is a schematic view of the construction of the fastening nut;

FIG. 5 is a schematic structural view of the housing;

in the figure: 1. a housing; 11. a step hole; 12. a first U-shaped groove; 13. a second U-shaped groove; 14. a fourth pin hole;

2. a transmission shaft; 21. a protruding position; 22. a second pin hole; 23. a second step bit;

3. a machine head; 31. an inner bore; 32. a first pin hole; 33. a first step bit; 34. a third pin hole;

41. a first bayonet; 42. a spring; 43. tightening a nut; 431. a limiting pin; 432. a spiral groove; 44. positioning a nut; 45. c-shaped spring clip; 46. and the second bayonet lock.

Detailed Description

The present utility model will be further described with reference to the accompanying drawings and detailed description, wherein, under the precondition that no conflict arises, new embodiments can be formed by any combination of the embodiments or technical features described below, and the present utility model is not limited to the specific embodiments of the present utility model, but is defined by the appended drawings.

As shown in fig. 1-5, a dental handpiece locking structure capable of being quickly detached is arranged in a shell 1 and used for locking a transmission shaft 2 and a handpiece 3 and the transmission shaft 2 and the shell 1, and comprises a first bayonet lock 41, a bulge position 21, a spring 42, a fastening nut 43 and a positioning nut 44;

the machine head 3 is connected with the transmission shaft 2 through a first bayonet lock 41; the machine head 3 and the transmission shaft 2 are ensured not to be axially separated, and the connection reliability is ensured;

the protruding position 21 is fixedly arranged at one end of the outer wall of the transmission shaft 2, the spring 42, the fastening nut 43 and the positioning nut 44 are sequentially arranged in the shell 1 from left to right, a step hole 11 with the inner diameter increased from left to right is formed in the shell 1, a first U-shaped groove 12 extending along the axis is formed in the right side of the inner wall of the shell 1, a limiting pin 431 and a spiral groove 432 are formed in the outer wall of the fastening nut 43, the limiting pin 431 slides in the first U-shaped groove 12, the protruding position 21 rotates on the right side of the inside of the shell 1 and is adaptively screwed in the spiral groove 432, the positioning nut 44 is fixedly arranged on the right side of the inner wall of the shell 1, and the spring 42 is kept in a compressed state. After the connection of the machine head 3 and the transmission shaft 2 is finished, one end of the transmission shaft 2 is inserted into the shell 1, when the boss 21 moves from the left side inside the shell 1 to the right side inside the shell 1 along with the transmission shaft 2, the boss 21 is contacted with the left end face of the fastening nut 43, at this time, the machine head 3 and the transmission shaft 2 are rotated to drive the boss 21 to rotate, so that one end of the boss 21 with the spiral groove 432 (namely, the front end of the spiral groove 432) is rotated into the spiral groove 432, the distance between the shell 1 and the machine head 3 is kept unchanged in the process that the boss 21 is rotated to the other end of the spiral groove 432 (namely, the bottom end of the spiral groove 432), the rotation of the transmission shaft 2 pulls the fastening nut 43 to generate horizontal displacement close to the machine head 3, the spring 42 is also in a further compressed state, after the boss 21 is locked, the machine head 3 is loosened, the transmission shaft 2 is completely inserted into the shell 1 under the elastic force of the spring 42, and the machine head 3 is tightly attached to the shell 1, so that the machine head 3 and the transmission shaft 2 are tightly locked; under the limiting action of the first U-shaped groove 12, the limiting pin 431 and the fastening nut 43 can only generate axial movement in the shell 1 and cannot rotate, so that the raised position 21 can be reliably screwed into the spiral groove 432 and drive the fastening nut 43 to displace and further compress the spring 42; the positioning nut 44 is fixedly arranged, so that the spring 42 is in a compressed state at the beginning, the tensioning effect of the elastic force of the spring 42 is ensured, and the handpiece 3 is tightly locked with the shell 1 all the time.

The machine head 3 is provided with an axial inner hole 31 and at least one radial first pin hole 32, the other end of the transmission shaft 2 is provided with second pin holes 22 corresponding to the first pin holes 32 one by one, the other end of the transmission shaft 2 is inserted into the inner hole 31, and the first bayonet lock 41 is inserted into the overlapped first pin holes 32 and second pin holes 22. The other end of the transmission shaft 2 is inserted into an inner hole 31 matched with the transmission shaft, the head 3 or the transmission shaft 2 is rotated, so that the first pin hole 32 is overlapped with the second pin hole 22 (namely, the axes of the first pin hole and the second pin hole are overlapped), and then the first bayonet pin 41 is inserted, so that the connection between the head 3 and the transmission shaft 2 can be realized.

The machine head 3 is provided with a first step position 33, the other end of the transmission shaft 2 is provided with a second step position 23, the first pin hole 32 is positioned on the first step position 33, and the C-shaped spring clip 45 is sleeved on the first step position 33, abuts against the first bayonet lock 41 and contacts with the end face of the second step position 23. The C-shaped spring clip 45 is annular and is provided with a notch, so that the C-shaped spring clip 45 can be opened around the notch, and after the C-shaped spring clip 45 is opened, the C-shaped spring clip 45 can be clipped on the first step position 33, thereby preventing the first bayonet lock 41 from falling off, and ensuring the reliable locking of the machine head 3 and the transmission shaft 2.

The maximum outer diameter of the second step 23 is not smaller than the maximum outer diameter of the C-shaped spring clip 45. The external diameter of the first step surface is smaller than that of the second step surface, so that after the C-shaped spring clamp 45 is sleeved on the first step surface, the second step surface can prevent the C-shaped spring clamp 45 from axially moving in a series, and the shielding and limiting effects of the C-shaped spring clamp 45 on the first clamping pin 41 are ensured to be reliable.

The left side of the inner wall of the shell 1 is provided with a second U-shaped groove 13 extending along the axial direction, one end of the second U-shaped groove 13 is communicated with the left end face of the shell 1, the other end of the second U-shaped groove is communicated with the engagement end face of the stepped hole 11, and the protruding position 21 slides into the shell 1 through the second U-shaped groove 13. Through the arrangement of the second U-shaped groove 13, when the outer wall of the transmission shaft 2 is matched with the left side of the inner wall of the shell 1, the protruding position 21 can slide in the second U-shaped groove 13 of the shell 1 and move to the right side of the inner wall of the shell 1, so that the whole volume of the shell 1 is more compact; the left inner diameter of the stepped hole 11 is smaller than the right inner diameter of the stepped hole 11, so that the spring 42, the fastening nut 43 and the positioning nut 44 can be ensured to be limited on the right side inside the shell 1, and the spring 42 can be elastically compressed under the extrusion of the joint end surface of the stepped hole 11 and the fastening nut 43.

One end of the first U-shaped groove 12 is communicated with the joint end face of the step hole 11, the other end of the first U-shaped groove is communicated with the right end face of the shell 1, and the fastening nut 43 slides into the shell 1 through the first U-shaped groove 12. After sliding into the housing 1, the fastening nut 43 is limited to the right side of the interior of the housing 1 by the spring 42 and the positioning nut 44 and is axially displaced therein.

The outer diameter of the spring 42 is larger than the inner diameter of the left side portion of the stepped hole 11. That is, one end of the spring 42 contacts the fastening nut 43 and the other end is limited by the engagement end surface of the stepped hole 11, so that the spring 42 can be compressed by the movement of the fastening nut 43.

The machine head 3 is also provided with at least one axial third pin hole 34, the left end face of the shell 1 is provided with fourth pin holes 14 corresponding to the third pin holes 34 one by one, and a second bayonet lock is inserted between the bottom of the third pin hole 34 and the bottom of the fourth pin hole 14. After the machine head 3 is locked with the transmission shaft 2 and before the boss 21 is locked with the fastening nut 43, the second bayonet lock is inserted into the fourth pin hole 14, after the boss 21 is locked with the fastening nut 43, the machine head 3 is loosened, the machine head 3 moves towards the left end face of the shell 1, at the moment, the state that the third pin hole 34 is aligned with the second bayonet lock is kept, after the spring 42 is reset for a certain stroke, the machine head 3 is tightly attached to the shell 1, the third pin hole 34 is sleeved into the second bayonet lock, at the moment, the spring 42 is still in a compressed state, and under the action of the second bayonet lock, the machine head 3 and the shell 1 cannot rotate, so that the reliable locking of the machine head 3 is realized.

The protruding positions 21 and the transmission shaft 2 are integrally formed or inserted on the transmission shaft 2, and the number of the second U-shaped grooves 13 is consistent with that of the protruding positions 21. The protruding positions 21 can be integrally formed with the transmission shaft 2, holes can be formed in the transmission shaft 2, one end of each protruding position 21 is inserted into each hole, the other end of each protruding position 21 is exposed, the number of the protruding positions 21 can be one or two, and preferably, the number of the protruding positions 21 is two, so that the transmission shaft 2 and the fastening nut can be kept in a balanced state under the axial tensioning action of the spring 42; at the same time, the number of the spiral grooves 432 is also identical to the number of the protruding portions 21, and one protruding portion 21 is screwed into the corresponding one of the spiral grooves 432.

One end of the spiral groove 432 is communicated with the left end face of the fastening nut 43, the other end of the spiral groove 432 is close to the right end face of the positioning nut 44, and the limiting pin 431 is located on the outer side of the spiral groove 432. The limiting pin 431 can be integrally formed with the fastening nut 43, and can also be inserted into the surface of the fastening nut 43 in a hole forming manner; one end of the spiral groove 432 is communicated with the end face of the fastening nut 43, so that the protruding position 21 can enter the spiral groove 432 from the end face of the fastening nut 43 and can drive to the other end of the spiral groove 432, the spring 42 can be further compressed, axial tension can be provided, the protruding position 21 can be reliably clamped at the other end of the spiral groove 432, and the locking of the transmission shaft 2 can be realized.

The locking principle of the utility model is as follows:

when the locking is carried out, the machine head 3 is connected with the transmission shaft 2 by using the first bayonet lock 41 and the C-shaped elastic clamp is clamped in, so that the machine head 3 and the transmission shaft are tightly connected, the protruding position 21 of the transmission shaft 2 penetrates into the shell 1 through the second U-shaped groove 13, the transmission shaft 2 is rotated, the protruding position 21 is opposite to one end of the spiral groove 432, the transmission shaft 2 is rotated forward, the protruding position 21 reaches the other end of the spiral shaft, in the process, the fastening nut is separated from the positioning nut 44, the spring 42 is continuously compressed, the machine head 3 is not contacted with the second bayonet lock, the machine head 3 is loosened after being twisted in place, the spring 42 returns, the third pin hole 34 on the machine head 3 is inserted into the second bayonet lock, reliable locking of the machine head 3 is realized, at the moment, the fastening nut 43 and the positioning nut 44 are still in a separated state, and the spring 42 is still in a compressed state, so that the spring 42 can provide enough tension.

When the machine head 3 is dismounted, the third pin hole 34 is pulled to be separated from the second bayonet lock, the machine head 3 is reversely rotated, the boss 21 can be screwed out of the fastening nut 43, the boss 21 is aligned with the second U-shaped groove 13, then the transmission shaft 2 is pulled out and separated from the shell, finally the C-shaped elastic card is dismounted, the first bayonet lock 41 is taken out, and the machine head 3 can be dismounted on the transmission shaft 2.

The above embodiments are only preferred embodiments of the present utility model, and the scope of the present utility model is not limited thereto, but any insubstantial changes and substitutions made by those skilled in the art on the basis of the present utility model are intended to be within the scope of the present utility model as claimed.

Claims

1. The dental handpiece locking structure capable of being rapidly disassembled is arranged in the shell (1) and is used for locking the transmission shaft (2) and the handpiece (3) and locking the transmission shaft (2) and the shell (1), and is characterized by comprising a first bayonet lock (41), a bulge position (21), a spring (42), a fastening nut (43) and a positioning nut (44);

the machine head (3) is connected with the transmission shaft (2) through a first bayonet lock (41);

the utility model discloses a transmission shaft, including protruding position (21), spring (42), fastening nut (43) and locating nut (44), protruding position (21) are fixed to be located outer wall one end of transmission shaft (2), spring (42), fastening nut (43) and locating nut (44) are arranged in casing (1) from left to right in proper order, be equipped with in casing (1) from left to right internal diameter grow step hole (11), the inner wall right side of casing (1) is equipped with first U type groove (12) that extend along the axis, be equipped with spacer pin (431) and helicla flute (432) on the outer wall of fastening nut (43), spacer pin (431) slide in first U type groove (12), protruding position (21) rotate in the inside right side of casing (1) and set up in helicla flute (432) with adaptation soon, locating nut (44) are fixed to be located the inner wall right side of casing (1), spring (42) keep compressed state.

2. A quick detachable dental hand piece head locking arrangement as in claim 1, wherein: the machine head (3) is provided with an axial inner hole (31) and at least one radial first pin hole (32), the other end of the transmission shaft (2) is provided with second pin holes (22) corresponding to the first pin holes (32) one by one, the other end of the transmission shaft (2) is inserted into the inner hole (31), and the first bayonet lock (41) is inserted into the first pin holes (32) and the second pin holes (22) which are overlapped.

3. A quick detachable dental hand piece head locking arrangement as in claim 2, wherein: the machine head (3) is provided with a first step position (33), the other end of the transmission shaft (2) is provided with a second step position (23), the first pin hole (32) is positioned on the first step position (33), and the C-shaped spring clip (45) is sleeved on the first step position (33), abuts against the first bayonet lock (41) and is in contact with the end face of the second step position (23).

4. A quick detachable dental hand piece head locking arrangement as claimed in claim 3, wherein: the maximum outer diameter of the second step position (23) is not smaller than the maximum outer diameter of the C-shaped bullet card (45).

5. A quick detachable dental hand piece head locking arrangement as in claim 1, wherein: the novel anti-slip shell is characterized in that a second U-shaped groove (13) extending along the axial direction is formed in the left side of the inner wall of the shell (1), one end of the second U-shaped groove (13) is communicated with the left end face of the shell (1), the other end of the second U-shaped groove is communicated with the connecting end face of the step hole (11), and the protruding position (21) slides into the shell (1) through the second U-shaped groove (13).

6. A quick detachable dental hand piece head locking arrangement as in claim 1, wherein: one end of the first U-shaped groove (12) is communicated with the connecting end face of the step hole (11), the other end of the first U-shaped groove is communicated with the right end face of the shell (1), and the fastening nut (43) slides into the shell (1) through the first U-shaped groove (12).

7. A quick detachable dental hand-piece head locking arrangement according to any of claims 1-6, wherein: the outer diameter of the spring (42) is larger than the inner diameter of the left side portion of the stepped hole (11).

8. A quick detachable dental hand piece head locking arrangement as in claim 1, wherein: the machine head (3) is further provided with at least one axial third pin hole (34), the left end face of the shell (1) is provided with fourth pin holes (14) corresponding to the third pin holes (34) one by one, and a second bayonet lock is inserted between the bottom of the third pin holes (34) and the bottom of the fourth pin holes (14).

9. The quick detachable dental hand piece head locking mechanism of claim 5, wherein: the protruding positions (21) and the transmission shaft (2) are integrally formed or inserted on the transmission shaft (2), and the number of the second U-shaped grooves (13) is consistent with that of the protruding positions (21).

10. A quick detachable dental hand piece head locking arrangement as in claim 1, wherein: one end of the spiral groove (432) is communicated with the left end face of the fastening nut (43), the other end of the spiral groove (432) is close to the right end face of the positioning nut (44), and the limiting pin (431) is located on the outer side of the spiral groove (432).