CN215651649U - Orthodontic forceps - Google Patents
Orthodontic forceps Download PDFInfo
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- CN215651649U CN215651649U CN202121899368.8U CN202121899368U CN215651649U CN 215651649 U CN215651649 U CN 215651649U CN 202121899368 U CN202121899368 U CN 202121899368U CN 215651649 U CN215651649 U CN 215651649U
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- connecting part
- screw
- pliers
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Abstract
The utility model discloses a pair of orthodontic pliers, which comprises a connecting screw, a left pliers and a right pliers, wherein a first connecting hole is formed in the left pliers, penetrates through the upper end face and the lower end face of the left pliers, the left pliers and the right pliers are arranged in a crossed manner, and the first connecting hole is aligned with a second connecting hole; the connecting screw is divided into a first connecting part and a second connecting part along the length direction of the connecting screw, the head end of the second connecting part is connected with the first connecting part, the second connecting part is of a taper body structure, and the diameter of the second connecting part is gradually increased along the direction from the head end to the tail end of the second connecting part; the connecting screw penetrates through the first connecting hole and is inserted into the second connecting hole, the first connecting portion is in threaded fit with the first connecting hole, the second connecting portion is located in the second connecting hole, the hole shape of the second connecting hole is matched with the second connecting portion, and the hole wall of the second connecting hole is attached to the outer wall of the second connecting portion. The contact area of the connecting screw and the second connecting hole is larger, the abrasion between the connecting screw and the right pliers is relatively slow, and the service life of the pliers is prolonged.
Description
Technical Field
The utility model relates to the field of dental appliances, in particular to an orthodontic pliers.
Background
Currently, in the pliers and scissors products on the market, the pliers and scissors have two joint structures of strontium penetrating (one pliers or scissors head penetrates through the middle of the other pliers) and strontium stacking (two pliers or scissors are stacked in the middle). Most of the strontium-stacking structures are formed by stacking two pliers bodies in a crossed mode, inserting screws into the overlapped positions of the two pliers bodies and connecting the two pliers bodies through the screws. One of the two clamp bodies is fixed with the screw, and the other clamp body can rotate relative to the screw. However, the conventional screw for connecting the pliers bodies has a relatively small effective contact area between the outer wall of the screw and the movable pliers body, so that the abrasion of the joint is serious, and the service life of the pliers is seriously influenced.
SUMMERY OF THE UTILITY MODEL
The utility model overcomes the defects in the prior art and provides the orthodontic pliers with slower joint abrasion and longer service life.
The technical scheme of the utility model is realized as follows:
the orthodontic pliers comprise a connecting screw, a left pliers and a right pliers, wherein a first connecting hole is formed in the left pliers, a second connecting hole is formed in the right pliers, the first connecting hole penetrates through the upper end face and the lower end face of the left pliers, the left pliers and the right pliers are arranged in a crossed mode, and the first connecting hole is aligned with the second connecting hole; the connecting screw is divided into a first connecting part and a second connecting part along the length direction of the connecting screw, the second connecting part is provided with a head end and a tail end along the length direction of the connecting screw, the head end of the second connecting part is connected with the first connecting part, the second connecting part is of a taper body structure, and the diameter of the second connecting part is gradually increased along the direction from the head end to the tail end of the second connecting part; the connecting screw penetrates through the first connecting hole and is inserted into the second connecting hole, the first connecting portion is located in the first connecting hole and in threaded fit with the first connecting hole, the second connecting portion is located in the second connecting hole, the hole shape of the second connecting hole is matched with the second connecting portion, and the hole wall of the second connecting hole is attached to the outer wall of the second connecting portion.
In a further aspect, the diameter of the first connection portion is smaller than the diameter of the head end of the second connection portion, so that a step surface is formed at the connection position of the first connection portion and the second connection portion.
Because the junction of first connecting portion and second connecting portion forms the step face, the step face between second connecting portion and the first connecting portion can offset with the terminal surface of left pincers to avoid connecting the excessive turn-knob of screw to lead to the second connecting portion to stretch into in the first connecting hole and take place to interfere with the pore wall of first connecting hole, play the guard action to the spiral line in the first connecting hole.
In a further scheme, an external thread is arranged on the outer wall of the first connecting part, so that the first connecting part is in threaded fit with the first connecting hole; the tapered surface of the second connecting portion is a smooth surface so that the left clamp can rotate relative to the second connecting portion.
Because the taper surface of the second connecting part is a smooth surface, the right pliers can rotate relative to the second connecting part, and because the taper surface is smooth, the friction force between the second connecting part and the second connecting hole is reduced, and the abrasion is reduced.
In a further scheme, the second connecting hole is provided with an inlet positioned on one side end face of the right clamp and an outlet positioned on the other side end face of the right clamp, and the diameter of the second connecting hole is gradually reduced from the inlet to the outlet to form a full-taper hole.
Because the diameter of the second connecting hole is gradually reduced from the inlet to the outlet to form a full-taper hole, the full-taper hole can be matched with the second connecting part, so that the outer wall of the second connecting part is completely attached to the hole wall of the second connecting hole, and the contact area is increased.
The design starting point, the idea and the beneficial effects of the utility model adopting the technical scheme are as follows:
because the connecting screw divide into first connecting portion and second connecting portion along self length direction, the second connecting portion are the taper body structure, and the diameter of second connecting portion increases gradually along self head end to tail end direction, and first connecting portion are located in the first connecting hole and with first connecting hole screw-thread fit, and the second connecting portion are located in the second connecting hole, the hole shape of second connecting hole with the second connecting portion phase-match. Compared with the traditional screw, the contact area between the second connecting part of the connecting screw and the second connecting hole is larger, the abrasion between the connecting screw and the right clamp is relatively slow, the stability between the connecting screw and the left clamp is greatly improved, and the service life of the whole clamp is prolonged.
Meanwhile, the joint tightness of the forceps can be controlled by only adjusting the length of the second connecting part and changing the friction force between the second connecting part and the right forceps, so that the medical forceps are suitable for medical forceps products with high requirements on the joint tightness.
Drawings
Fig. 1 is a front view of an orthodontic pliers;
fig. 2 is a side view and a partially enlarged view of the orthodontic pliers;
fig. 3 is a comparison diagram of a conventional screw and a connecting screw inserted into a first connecting hole and a second connecting hole.
The figures are numbered: 1-left clamp, 2-right clamp, 3-first connecting hole, 4-second connecting hole, 5-connecting screw, 6-first connecting part, 7-second connecting part and 8-step surface.
Detailed Description
In order that the above objects, features and advantages of the present invention can be more clearly understood, a more particular description of the utility model will be rendered by reference to the appended drawings. It should be noted that the embodiments and features of the embodiments of the present application may be combined with each other without conflict.
In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, however, the present invention may be practiced in other ways than those specifically described herein, and therefore the scope of the present invention is not limited by the specific embodiments disclosed below.
The specific embodiment of the utility model is as follows:
example (b): as shown in fig. 1 to 3, the present invention provides an orthodontic pliers comprising a connecting screw 5, a left pliers 1 and a right pliers 2. Be provided with first connecting hole 3 on the left pincers 1, be provided with second connecting hole 4 on the right pincers 2, left pincers 1 and right pincers 2 alternately stack for first connecting hole 3 aligns with second connecting hole 4. The connection screw 5 is inserted into the second connection hole 4 through the first connection hole 3.
Connecting screw 5 is divided into first connecting portion 6 and second connecting portion 7 along self length direction, and wherein first connecting portion 6 is the cylinder structure, first connecting hole 3 be with first connecting portion 6 assorted circular through-hole, first connecting portion 6 inserts in first connecting hole 3, and the outer wall of first connecting portion 6 is provided with the external screw thread, be screw-thread fit between first connecting portion 6 and the first connecting hole 3.
And the second connection portion 7 of the connection screw 5 is positioned in the second connection hole 4. In the scheme, the second connecting part 7 is of a taper body structure. Specifically, the second connection portion 7 has a truncated cone structure. More specifically, as shown in fig. 2, the second connection portion 7 has a head end and a tail end along the length direction of the connection screw 5, the head end of the second connection portion 7 is connected to the first connection portion 6, and the diameter of the second connection portion 7 gradually increases along the head end to the tail end direction thereof. The hole shape of the second connecting hole 4 in the scheme is matched with the second connecting part 7. Specifically, the second connecting hole 4 has an inlet located at one side end face of the right clamp 2 and an outlet located at the other side end face of the right clamp 2, wherein the side end face of the right clamp 2 provided with the outlet is abutted to the left clamp 1. The diameter of the second connecting hole 4 is gradually reduced from the inlet to the outlet to form a full-taper hole.
Since the connection screw 5 is inserted into the second connection hole 4 through the first connection hole 3, the first connection portion 6 is located in the first connection hole 3, and the second connection portion 7 is located in the second connection hole 4. And because the first connecting part 6 is in threaded fit with the first connecting hole 3, the connecting screw 5 and the left clamp 1 are kept relatively fixed. The second connecting portion 7 is of a cone frustum structure, the second connecting hole 4 is a full-taper hole matched with the second connecting portion 7, and the second connecting portion 7 is in running fit with the second connecting hole 4. So that the left tong 1 can be turned relative to the right tong 2 about the connecting bolt.
Referring to fig. 3 (the dotted line in fig. 3 is the structure of a conventional screw), the contact area between the second connection portion 7 and the second connection hole 4 in the connection screw 5 is definitely larger than that of a conventional screw. The wear between the connecting screw 5 and the right clamp 2 is relatively slow. By way of example only, such as one wheel, the wider the wheel the slower it wears. Also, the larger the contact area between the second connection portion 7 and the second connection hole 4, the slower the wear thereof. And because the abrasion between the connecting screw 5 and the right pliers 2 is relatively slow, the stability between the connecting screw 5 and the left pliers 1 is greatly improved, and the service life of the whole pliers is prolonged.
And preferably, the taper surface of the second connecting part 7 is a smooth surface. And because the tapered surface is smooth, the friction force between the second connecting part 7 and the second connecting hole 4 is reduced, and the abrasion is reduced.
Meanwhile, the structure can change the joint tightness of the pliers only by adjusting the length of the second connecting part 7. When medical personnel need the tighter pliers of joint elasticity, only need insert the longer connecting screw 5 of second connecting portion 7, just can increase the area of contact between second connecting portion 7 and the second connecting hole 4, improve the frictional force between second connecting portion 7 and the right side pincers 2, just can make the joint elasticity tighter. And when medical personnel need the pliers that the joint elasticity is pine, only need shorten the length of second connecting portion 7, reduce the area of contact between second connecting portion 7 and the second connecting hole 4, reduce the frictional force between second connecting portion 7 and the right pincers 2, just can make the joint elasticity pine.
In addition, in the present embodiment, the diameter of the first connecting portion 6 is smaller than the diameter of the head end of the second connecting portion 7, and a step surface 8 is formed at the connection portion between the first connecting portion 6 and the second connecting portion 7. When the user overtravel the screw downwards, the diameter of the head end of the second connecting part 7 of the transmission screw is equal to that of the first connecting part 6, and the head end of the second connecting part 7 tends to extend into the first connecting hole 3, so that the hole edge of the first connecting hole 3 and the threads on the inner wall are damaged. In the scheme, the step surface 8 is formed at the joint of the first connecting part 6 and the second connecting part 7, and when a user turns the screw downwards to exceed the stroke, the step surface 8 can abut against the end surface of the right clamp 2, so that the second connecting part 7 and the first connecting hole 3 are protected.
The present invention and its embodiments have been described above schematically, without limitation, and what is shown in the drawings is only one of the embodiments of the present invention, and the actual structure is not limited thereto. Therefore, if the person skilled in the art receives the teaching, without departing from the spirit of the utility model, the person skilled in the art shall not inventively design the similar structural modes and embodiments to the technical solution, but shall fall within the scope of the utility model.
Claims (4)
1. An orthodontic forceps, characterized in that: the clamp comprises a connecting screw, a left clamp and a right clamp, wherein a first connecting hole is formed in the left clamp, a second connecting hole is formed in the right clamp, the first connecting hole penetrates through the upper end face and the lower end face of the left clamp, the left clamp and the right clamp are arranged in a crossed mode, and the first connecting hole is aligned with the second connecting hole; the connecting screw is divided into a first connecting part and a second connecting part along the length direction of the connecting screw, the second connecting part is provided with a head end and a tail end along the length direction of the connecting screw, the head end of the second connecting part is connected with the first connecting part, the second connecting part is of a taper body structure, and the diameter of the second connecting part is gradually increased along the direction from the head end to the tail end of the second connecting part; the connecting screw penetrates through the first connecting hole and is inserted into the second connecting hole, the first connecting portion is located in the first connecting hole and in threaded fit with the first connecting hole, the second connecting portion is located in the second connecting hole, the hole shape of the second connecting hole is matched with the second connecting portion, and the hole wall of the second connecting hole is attached to the outer wall of the second connecting portion.
2. The orthodontic pliers according to claim 1, wherein: the diameter of the first connecting part is smaller than that of the head end of the second connecting part, so that a step surface is formed at the connecting part of the first connecting part and the second connecting part.
3. The orthodontic pliers according to claim 1, wherein: the outer wall of the first connecting part is provided with external threads, so that the first connecting part is in threaded fit with the first connecting hole; the tapered surface of the second connecting portion is a smooth surface so that the left clamp can rotate relative to the second connecting portion.
4. The orthodontic pliers according to claim 1, wherein: the second connecting hole is provided with an inlet positioned on one side end face of the right clamp and an outlet positioned on the other side end face of the right clamp, and the diameter of the second connecting hole is gradually reduced from the inlet to the outlet to form a full-taper hole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121899368.8U CN215651649U (en) | 2021-08-13 | 2021-08-13 | Orthodontic forceps |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121899368.8U CN215651649U (en) | 2021-08-13 | 2021-08-13 | Orthodontic forceps |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215651649U true CN215651649U (en) | 2022-01-28 |
Family
ID=79952179
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121899368.8U Active CN215651649U (en) | 2021-08-13 | 2021-08-13 | Orthodontic forceps |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215651649U (en) |
-
2021
- 2021-08-13 CN CN202121899368.8U patent/CN215651649U/en active Active
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