CN221672049U - Connector and disposable dental drill handpiece - Google Patents

Abstract

The utility model relates to the field of medical equipment, in particular to a connector and a dental drill handpiece using the connector. The connector provided by the utility model comprises a connecting sleeve, a middle sleeve and a connector core, wherein two ends of the connector core are respectively used for being assembled with a first device and a second device, one of the connector core and the middle sleeve is provided with a baffle body, the other one of the connector core and the middle sleeve is provided with an L-shaped accommodating space, the L-shaped accommodating space is provided with a baffle strip, the accommodating space is divided into a first part and a second part by the baffle strip, the second part is opened to a first device, the end part of the baffle body is assembled in the first part, the baffle strip blocks the baffle body from the first part to enter the second part, the connecting sleeve is clamped with the middle sleeve when rotated in a direction of loosening threaded connection, the middle sleeve is driven to rotate so as to enable the baffle strip to move towards the baffle body, the baffle strip is broken by the baffle body, and the connector is broken and cannot be assembled with the first device and the second device again, so that disposable instruments in the first device and the second device cannot be reused.

Description

Connector and disposable dental drill handpiece

Technical Field

The utility model relates to the field of medical instruments, in particular to a connector and a disposable dental drill handpiece using the connector.

Background Art

The dental drill handpiece is a handheld instrument and a commonly used medical device in modern dental surgery. The main structure of the existing dental drill handpiece is shown in Figure 1, which generally includes a handpiece 11, a drill needle 12, a handpiece cover 13, a front handle 14, a rear handle 15, etc. A power wind wheel and a wind wheel shaft are provided in the space where the handpiece 11 and the handpiece cover 13 are buckled to drive the drill needle 12 to rotate. The rear handle 15 is connected to a dental treatment instrument, and the dental treatment instrument provides the water source, air source, and power source required for the dental drill handpiece to work. Corresponding channels are provided in the handpiece 11, the front handle 14, and the rear handle 15, including a water channel, an air pipe channel, and a power wiring channel, etc., to connect the handpiece 11 to the water, electricity, etc. required for treatment. The dental drill handpiece is generally connected to the dental treatment instrument through a hose, one end of the hose is connected to the rear handle 15 of the dental drill handpiece, and the other end is connected to the dental treatment instrument. After the dental treatment instrument is turned on, water and air reach the water channel and air pipe channel of the dental drill handpiece, the air channel blows to the power wind wheel to drive the drill needle 12 to rotate, and the water channel passes through the inside of the handpiece and then sprays to the working area of the drill needle 12, thereby realizing dental surgery operations such as cutting, grinding, shaving and drilling.

In order to prevent cross infection, disposable dental drill handpieces are increasingly used. However, the reuse of disposable medical devices will bring great health risks to patients. How to prevent the reuse of disposable dental drill handpieces has become an issue that needs to be considered. The same problem also exists in the application of other similar disposable medical devices.

Utility Model Content

In order to solve the problem of repeated use of disposable instruments, the utility model provides a connector and a disposable dental drill handpiece using the connector.

The utility model provides a connector, comprising: a connecting sleeve, an intermediate sleeve and a joint core, two ends of the joint core are respectively used for assembling with a first device and a second device, one of the first device and the second device is a disposable device, the intermediate sleeve is sleeved on the joint core, the connecting sleeve is sleeved on the intermediate sleeve, one end of the connecting sleeve is provided with an internal thread for threaded connection with the second device, when the connecting sleeve is threadedly fastened with the second device, the first device, the joint core and the second device form a fastened assembly, wherein: one of the joint core and the intermediate sleeve is provided with a stopper body, and the other is provided with an L-shaped accommodating space, at least one stopper bar is provided in the L-shaped accommodating space, the stopper bar divides the accommodating space into a first part and a second part, the second part is open to the first device, the end of the stopper body is assembled in the first part, and the stopper bar is used to block the stopper body from entering the second part from the first part; when the connecting sleeve rotates in the direction of loosening the threaded connection, it is clamped with the intermediate sleeve, driving the intermediate sleeve to rotate so that the stopper bar moves toward the stopper body.

In one embodiment, the width of the second portion gradually increases from the barrier strip toward the first component.

In one embodiment, the baffle body is arranged on the outer peripheral surface of the joint core, and the L-shaped accommodating space is an L-shaped notch arranged on the tube wall of the intermediate sleeve; an installation groove is also arranged on the inner wall of the intermediate sleeve, and the installation groove connects the first part and the end of the intermediate sleeve facing the second device, and is used to assemble the end of the baffle body into the first part.

In another embodiment, the baffle body is arranged on the inner wall of the intermediate sleeve, and the L-shaped accommodating space is an L-shaped groove arranged on the outer peripheral surface of the joint core; a third groove body is also arranged on the outer peripheral surface of the joint core, and the third groove body connects the first part and the end of the joint core facing the second device, and is used to assemble the end of the baffle body into the first part.

In another specific embodiment, the connecting sleeve is clamped with the intermediate sleeve when it rotates in the direction of loosening the threaded connection, specifically including: at least one one-way tooth is provided on the inner wall of the connecting sleeve, and at least one buckle is provided on the outer circumferential surface of the intermediate sleeve, and the surfaces opposite to the one-way tooth and the buckle are both inclined surfaces, and when the connecting sleeve is rotated in the direction of tightening the threaded connection, the inclined surface of the one-way tooth passes over the inclined surface of the buckle, and when the connecting sleeve is rotated in the direction of loosening the threaded connection, the end face of the one-way tooth abuts against the buckle.

One end of the buckle is fixedly connected to the middle sleeve, and the other end is tilted toward the inner wall of the connecting sleeve (21), and a redundant groove is provided between the buckle and the connecting sleeve.

When any of the above connectors is applied to a dental drill handpiece, the first component includes a hose for connecting a dental treatment instrument, the second component includes a dental drill handpiece, and the internal thread of the connecting sleeve is used for threaded connection to the handle of the dental drill handpiece.

The utility model also provides a disposable dental drill handpiece, comprising any one of the above-mentioned connectors.

The connector provided by the utility model is used to connect a first device and a second device, wherein one of the first device and the second device is a disposable device. When the self-destructive connector provided by the utility model is removed, the connector structure must be destroyed in a destructive manner. After the connector is destroyed, the disposable device can no longer be connected, thereby preventing it from being reused.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG1 is a schematic diagram of the main structure of an existing dental drill mobile phone;

FIG2 is an exploded view of a connector provided by the utility model for a disposable dental drill handpiece;

FIG3A is a schematic structural diagram of the connector provided by the utility model for a disposable dental drill handpiece after assembly;

FIG3B is an enlarged schematic diagram of the assembly structure between the intermediate sleeve and the connecting sleeve in the connector provided by the present invention;

FIG4 is a schematic diagram of the connector provided by the present invention in a use state after being disassembled;

FIG5A is another specific example of a stop bar in a connector provided by the present invention;

FIG5B is another specific structural example of an L-shaped notch in a connector provided by the present invention;

FIG6 is a specific example of the middle sleeve in the connector provided by the utility model;

FIG7 is a schematic diagram of the assembly state between the intermediate sleeve and the connector core in the connector provided by the present invention;

FIG8A is a schematic diagram of the clamping structure between the connecting sleeve and the intermediate sleeve in the connector provided by the present invention;

FIG8B is an enlarged schematic diagram of the one-way teeth and the buckle part of the connector provided by the present invention when they are mated;

FIG9A is a schematic diagram of a connecting sleeve structure provided with a blocking body in another connector provided by the present invention;

FIG. 9B is a schematic diagram of a connector core structure with an L-shaped slot in another connector provided by the present invention.

Reference numerals:

11. Machine head; 12. Drill needle; 13. Machine head cover; 14. Front machine handle; 15. Rear machine handle

21. Connecting sleeve; 22. Intermediate sleeve; 23. Joint core; 24. Water tower joint

31. Block body; 32. L-shaped notch; 33. Block bar

321, first notch; 322, second notch; 323, mounting groove

60. Buckle; 61. Redundant slot

80. One-way gear

92, L-shaped slot; 921, first slot 921; 922, second slot; 923, third slot

DETAILED DESCRIPTION

The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field belong to the scope of protection of the utility model.

The utility model provides a self-destructive connector to solve the problem of reuse of disposable devices, and is used to connect a first device and a second device, wherein one of the first device and the second device is a disposable device. When the self-destructive connector provided by the utility model is removed, the connector structure must be destroyed in a destructive manner. Since the connector is a matching connector of a disposable device, when the connector is destroyed, the disposable device can no longer be connected, thereby preventing it from being reused.

The following takes a disposable dental drill handpiece as an example, and describes in detail the self-destructive connector provided by the utility model in conjunction with the accompanying drawings. In this specific embodiment, the two connected devices are the hose of the dental treatment instrument and the dental drill handpiece. When the disposable dental drill handpiece is removed from the hose, the self-destructive connector is destroyed, and the disposable dental drill handpiece cannot be connected to the dental treatment instrument again.

As shown in Figure 2, it is an exploded view of the connector provided by the utility model for a disposable dental drill mobile phone, which mainly includes: a connecting sleeve 21, an intermediate sleeve 22 and a joint core 23, and the two ends of the joint core 23 are respectively used to assemble with a hose and a dental drill mobile phone. As shown in the figure, the A direction connects one end of the hose, and the other end of the hose is connected to the dental treatment instrument. A plurality of through holes are provided in the joint core 23, which correspond to water channels, tracheal channels, and power wiring channels, etc. In the A direction, each through hole can also be plugged with a joint, such as a water tower joint 24, and the water tower joint 24 is used to be plugged with the hole position of the corresponding channel of the hose. It should be noted that the water tower joint 24 can also be assembled on one side of the hose. The B direction can be connected to the handle of the dental drill mobile phone. When the handle structure of the dental drill mobile phone is divided into a front handle 14 and a rear handle 15, the B direction is connected to the rear handle 15.

As shown in FIG3A and FIG3B, FIG3A is a schematic diagram of the structure of the self-destructive connector provided by the utility model for a disposable dental drill mobile phone after assembly, and FIG3B is an enlarged schematic diagram of the assembly structure between the intermediate sleeve 22 and the connecting sleeve 21. For the convenience of observation, the connecting sleeve 21 is cut open in FIG3B, so that the assembly structure between the intermediate sleeve 22 and the joint core 23 can be clearly observed. The intermediate sleeve 22 is sleeved on the joint core 23, and the connecting sleeve 21 is sleeved on the intermediate sleeve 22. One end of the connecting sleeve 21 is provided with an internal thread for threaded connection to the handle of the dental drill mobile phone. When the connecting sleeve 21 is threadedly connected to the second device, a tightening assembly is formed between the hose, the joint core 23 and the dental drill mobile phone, that is, the hose, the connector and the dental drill mobile phone are tightened.

In order to realize the self-destruction of the connector, a stopper 31 is provided on the outer circumference of the connector core 23, an L-shaped notch 32 is provided on the intermediate sleeve 22, and at least one stopper 33 is provided in the L-shaped notch 32. The stopper 33 divides the L-shaped notch 32 into a first notch 321 and a second notch 322, and the second notch 322 is open to the first device. In the self-destruction connector provided by the utility model, the end of the stopper 31 is assembled in the first notch 321, and the stopper 33 is used to prevent the stopper 31 from entering the second notch 322 from the first notch 321, that is, the end of the stopper 31 is limited in the first notch 321, so that a fastened assembly relationship is formed between the first device, the connector and the second device, and the working state can be entered. 3A and 3B , when the connecting sleeve 21 rotates in the direction of loosening the second device, that is, when the connecting sleeve 21 rotates in the clockwise direction when viewed from the B direction, the connecting sleeve 21 drives the intermediate sleeve 22 to rotate clockwise. At this time, the two ends of the joint core 23 remain stationary due to being fixed by the hose and the dental drill handpiece. The rotation of the intermediate sleeve 22 will cause the blocking bar 33 to turn toward the blocking body 31, causing the blocking bar 33 to be broken by the blocking body 31.

As shown in Figure 4, it is a schematic diagram of the use state of the connector provided by the utility model after being disassembled. After the retaining bar 33 is broken, the connector is disassembled. Since the second notch 322 is open to the second device, the end of the retaining body 31 is no longer limited in the first notch 321, and the retaining body 31 enters the second notch 322 from the first notch 321 and slides out of the second notch 32. The connector core 23 and the intermediate sleeve 22 are disengaged, and the dental drill handpiece is separated from the connector core 23 together with the connecting sleeve 21 and the intermediate sleeve 22. Since the retaining bar 33 has been broken, the end of the retaining body 31 can no longer be stably assembled into the first notch 321 of the L-shaped notch 32, so the connector cannot be assembled again, achieving the purpose of self-destruction. The retaining body 31 structure shown in Figure 4 is also called a retaining pin, which is only a specific example. Any other similar protruding structure can be used as long as it can complete the functions described in the utility model, and does not limit the protection scope of the utility model.

In an embodiment of the utility model, the baffle 33 is generally located at the turning point of the L-shaped notch 32, and can prevent the baffle body 31 from entering the first notch 321 from the second notch 322, and can be hit by the baffle body 31 when the intermediate sleeve 22 rotates. The baffle 33 and the L-shaped notch 32 can be integrally formed, and the connection between the two is a brittle connection, which will break with a slight force when rotating. The baffle 33 can be connected to the L-shaped notch 32 at both ends to form a relatively closed second notch 322, such as the structure shown in Figure 3. It can also be shown in Figure 5A, for example, which is another specific example of the baffle 33 in the connector provided by the utility model. Only one end of the baffle 33 is connected to the L-shaped notch 32. The number of baffles 33 can be one or more, and Figure 5A shows that the number of baffles 33 is 3. As shown in FIG. 5B , another specific structure of the L-shaped notch 32 is shown. From the position of the stop bar 33 to the first device, the width of the second notch 322 of the L-shaped notch 32 gradually increases, and preferably, gradually increases in the direction opposite to the rotation direction, that is, the boundary on the right side of the second notch 322 can be tilted to the right. The purpose of this setting is to allow the stopper 31 to slide off the second notch 322 of the L-shaped notch 32 more smoothly during the rotation of the rotating sleeve. The specific examples of the stopper 31 and the L-shaped notch 32 given in the utility model are not the only implementation methods, and do not limit the protection scope of the utility model.

As described above, the stop bar 33 and the L-shaped notch 32 form a set of self-destruction structures, which can be provided in one set or two sets. As shown in FIG6 , if two sets are provided, they are symmetrically distributed around the connector.

As shown in Figure 6, a specific example of the intermediate sleeve 22 in the connector provided by the utility model, in order to facilitate the assembly of the block body 31, an installation groove 323 extending from the first notch 321 to the end of the second device is provided on the inner wall of the intermediate sleeve 22, and the installation groove 323 is used to assemble the end of the block body 31 into the first notch 321.

As shown in FIG. 7 , it is a schematic diagram of the assembly state between the middle sleeve 22 and the connector core 23 in the connector provided by the present invention. During assembly, the end of the blocking body 31 is aligned with the mounting groove 323 and then assembled from the mounting groove 323 into the first notch 321 of the L-shaped notch 32.

As shown in Fig. 6, Fig. 8A and Fig. 8B, Fig. 8A is a schematic diagram of the clamping structure between the connecting sleeve 21 and the intermediate sleeve in the present invention, and Fig. 8B is an enlarged schematic diagram of the one-way tooth 80 and the buckle 60 in the clamping state. After the connecting sleeve 21 and the intermediate sleeve are assembled, the connecting sleeve 21 drives the intermediate sleeve 22 to rotate together when rotating in the clockwise direction. For this purpose, the inner wall of the connecting sleeve 21 is provided with a one-way tooth 80 with an inclined surface, and the outer peripheral surface of the intermediate sleeve 22 is provided with at least one buckle 60. The surface of the buckle 60 opposite to the one-way tooth 80 is also an inclined surface, and the inclined directions of the two inclined surfaces are the same. When the connecting sleeve 21 rotates in the direction of tightening the first device, that is, when it rotates counterclockwise when viewed from the B direction, the inclined surface of the one-way tooth 80 passes over the inclined surface of the buckle 60, which will not affect the tightening operation. When the connecting sleeve 21 rotates in the direction of releasing the second device, that is, rotates in the clockwise direction when viewed from the B direction, the end surface of the one-way tooth 80 abuts against the buckle 60. A specific implementation of the buckle 60 is shown in FIG6 , one end of which is fixedly connected to the intermediate sleeve 22, and the other end is tilted toward the inner wall of the connecting sleeve 21. The surface of the buckle 60 facing the inner wall of the connecting sleeve 21 is an inclined surface, which is consistent with the inclined direction of the inclined surface of the one-way tooth 80. A redundant groove 61 is provided between the buckle 60 and the intermediate sleeve 22. FIG6 shows only a specific implementation of the buckle 60, not the only way.

As shown in Fig. 8A, the one-way teeth 80 on the inner wall of the connecting sleeve 21 may include at least two, which are evenly arranged at the same interval on the inner wall of the connecting sleeve 21. As shown in Fig. 6, the buckle 60 on the middle sleeve 22 may be located at the end facing the dental drill handpiece, and the number may be two, or three or more.

The self-destructive connector provided by the utility model can be well used on a disposable dental drill mobile phone, and can also be used in other similar scenarios where two devices need to be connected.

In the above embodiment provided by the utility model, the blocking body 31 is arranged on the joint core 23, and the L-shaped notch 32 is arranged on the intermediate sleeve 22. In another embodiment, the positions of the blocking body 31 and the L-shaped notch 32 can be interchanged. As shown in Figures 9A and 9B, Figure 9A is a schematic diagram of the structure of the rotating sleeve with the blocking body 31 arranged on the inner wall, and Figure 9B is a schematic diagram of the structure of the joint core with the L-shaped slot 92 arranged on the outer circumference. The structure of the L-shaped slot 92 is similar to that of the L-shaped notch 32, and is divided into a first part and a second part, namely a first slot body 921 and a second slot body 922, by the blocking bar 33, and a third slot body 923 required for assembling the end of the blocking body 31 can also be provided. The functions of the first slot body 921, the second slot body 922 and the third slot body 923 correspond to the functions of the first notch 321, the second notch 322 and the mounting slot 323 in the previous embodiment respectively. The second slot body 922 and the third slot body 923 can be merged into a slot structure. The detailed working principle of this embodiment is as described above, and will not be repeated here. It should be noted that, according to the L-shaped slot structure shown in FIG. 9B , the rotation direction of the internal thread at the end of the connecting sleeve needs to be changed. Alternatively, without changing the rotation direction of the internal thread, the position of the second slot body 922 in FIG. 9B is set to the opposite side relative to the first slot body 921. In this way, when the connecting sleeve drives the rotating sleeve to rotate, the movement direction of the blocking bar 33 is to hit the blocking body 31.

In summary, in the present invention, one of the joint core 23 and the intermediate sleeve 22 is provided with a stopper 31, and the other is provided with an L-shaped accommodation space, and at least one stopper 33 is provided in the L-shaped accommodation space, and the stopper 33 divides the accommodation space into a first part and a second part, and the second part is open to the first device, and the end of the stopper 31 is assembled in the first part, and the stopper 33 is used to block the stopper 31 from entering the second part from the first part; when the connecting sleeve 21 rotates in the direction of loosening the threaded connection, it is engaged with the intermediate sleeve 22, and drives the intermediate sleeve 22 to rotate so that the stopper 33 moves toward the stopper 31. For specific examples of the L-shaped accommodation space, refer to the L-shaped notch and L-shaped slot provided in the present invention, wherein the specific examples of the first part refer to the first notch 321 and the first slot 921, and the specific examples of the second part refer to the second notch 322 and the second slot 922.

The specific implementation methods described above further illustrate the purpose, technical solutions and beneficial effects of the utility model in detail. It should be understood that the above description is only the specific implementation method of the utility model and is not intended to limit the protection scope of the utility model. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the utility model should be included in the protection scope of the utility model.

Claims (10)

1. A connector, comprising: coupling sleeve (21), intermediate sleeve (22) and joint core (23), joint core (23) both ends are used for respectively with first device and second device assembly, first device with one of second device is disposable device, intermediate sleeve (22) suit is in on joint core (23), coupling sleeve (21) suit is in on intermediate sleeve (22), coupling sleeve (21) one end is provided with and is used for threaded connection the internal thread of second device, coupling sleeve (21) with when second device screw thread fastening connection, first device connect core (23) with second device formation fastening assembly, wherein:

One of the joint core (23) and the middle sleeve (22) is provided with a baffle body (31), the other is provided with an L-shaped accommodating space, at least one baffle strip (33) is arranged in the L-shaped accommodating space, the accommodating space is divided into a first part and a second part by the baffle strip (33), the second part is opened to the first device, the end part of the baffle body (31) is assembled in the first part, and the baffle strip (33) is used for blocking the baffle body (31) from entering the second part from the first part;

The connecting sleeve (21) is clamped with the middle sleeve (22) when rotating in the direction of loosening the threaded connection, and drives the middle sleeve (22) to rotate so that the barrier strip (33) moves towards the barrier body (31).

2. The connector of claim 1, wherein the width of the second portion increases gradually from the barrier rib (33) toward the first device.

3. The connector according to claim 1, wherein the baffle body (31) is provided on the outer peripheral surface of the joint core (23), and the L-shaped accommodation space is an L-shaped notch (32) provided on the pipe wall of the intermediate sleeve (22);

A mounting groove (323) is also provided on the inner wall of the intermediate sleeve (22), the mounting groove (323) communicating the first portion with the end of the intermediate sleeve (22) facing the second means for fitting the end of the blocking body (31) into the first portion.

4. The connector according to claim 1, wherein the blocking body (31) is provided on an inner wall of the intermediate sleeve (22), and the L-shaped accommodation space is an L-shaped groove provided on an outer peripheral surface of the joint core (23);

A third groove body is further arranged on the outer peripheral surface of the joint core (23), and the third groove body is communicated with the first part and the end part of the joint core (23) facing the second device, and is used for assembling the end part of the baffle body (31) into the first part.

5. The connector according to claim 1, wherein the connecting sleeve (21) is clamped with the middle sleeve (22) when rotating in a direction for loosening the threaded connection, specifically comprising at least one unidirectional tooth (80) arranged on the inner wall of the connecting sleeve (21), at least one buckle (60) arranged on the outer circumferential surface of the middle sleeve (22), the surfaces of the unidirectional tooth (80) opposite to the buckle (60) are inclined surfaces, when the connecting sleeve (21) rotates in a direction for fastening the threaded connection, the inclined surfaces of the unidirectional tooth (80) are scratched from the inclined surfaces of the buckle (60), and when the connecting sleeve (21) rotates in a direction for loosening the threaded connection, the end surfaces of the unidirectional tooth (80) are abutted against the buckle (60).

6. The connector according to claim 5, wherein one end of the buckle (60) is fixedly connected with the middle sleeve (22), the other end of the buckle is tilted towards the inner wall of the connecting sleeve (21), and a redundant groove is arranged between the buckle (60) and the connecting sleeve (21).

7. The connector according to claim 6, wherein the clasp (60) comprises at least two, uniformly arranged at the end of the intermediate sleeve (22) facing the second means, and the unidirectional teeth (80) comprise at least two, uniformly arranged on the inner wall of the connection sleeve (21).

8. The connector of any of claims 1 to 7, wherein the first means comprises a hose for connecting a dental treatment instrument and the second means comprises a dental handpiece, and the internal thread of the connection sleeve (21) is for threaded connection to a shank of the dental handpiece.

9. Connector according to claim 8, further comprising at least two channels provided in the connector core (23), each channel being further plugged with a connector.

10. A disposable dental drill handpiece comprising a connector according to any one of claims 1 to 9.