CN219207391U

CN219207391U - Bow expander

Info

Publication number: CN219207391U
Application number: CN202320147787.9U
Authority: CN
Inventors: 王金刚
Original assignee: Foshan Zhende Smart Dental Co ltd
Current assignee: Foshan Zhende Smart Dental Co ltd
Priority date: 2023-01-18
Filing date: 2023-01-18
Publication date: 2023-06-20
Anticipated expiration: 2033-01-18

Abstract

The utility model discloses an arch expander, which comprises: a base; the screw is in threaded connection with the base, and is provided with an adjusting hole; the extending direction of the guide structure is parallel to the extending direction of the screw rod, and the guide structure is used for guiding the base; the clamping structure comprises a ratchet body, a pawl body and a return spring, wherein the ratchet body and the pawl body are both rotationally connected with the base, the screw rod drives the ratchet body to rotate, the ratchet body is meshed with the pawl body, and the return spring is connected with the pawl body; the number of the clamping structures is at least two, and at least two ratchet bodies are arranged in a staggered mode. The positions of the two ratchet bodies of the two clamping structures are arranged in a staggered mode, so that the ratchet teeth and tooth grooves of the two ratchet bodies are staggered, and the limiting precision of the ratchet bodies is improved. The problems of excessive number of ratchets on the ratchet wheel, reduced strength of the ratchets and the like can be avoided, and the occurrence probability of accidents such as mistaken swallowing of patients caused by breakage of the ratchets during rotation prevention is reduced.

Description

Bow expander

Technical Field

The utility model relates to the technical field of medical appliances, in particular to an arch expander.

Background

The correction principle of the expander is that the expander screw is placed at a proper position, the expander screw is inserted into an opening on the screw rod through a tool, then the screw rod is driven to rotate through the tool so as to expand the expander, and correction force is transmitted to teeth and alveolar bones through the base so as to expand the width and length of the dental arches of the upper jaw and the lower jaw. The indications are as follows: bilateral or unilateral constriction of the maxillary dental arch; the anterior segment of the mandibular arch is shortened due to the inward inclination of anterior teeth of the upper and lower jaws, crowding or congenital missing incisors; the length of the dental arch is shortened due to the forward movement of the molar.

However, in the practical use process, after the large arch expander is opened by rotating the spiral hole, the screw rod often rotates by a certain angle due to the result of the reaction force of the jaw bone to the arch expander, so that the arch expanding effect is weakened; if the screw rotates, when the screw is rotated again to open the expander, the degree and distance of the expanded bow cannot be accurately judged.

In the prior art, a scheme of using a single ratchet wheel to prevent the jaw from rotating a screw rod due to the reaction force of the jaw on the arch expander and improving the arch expanding efficiency exists, but the limit provided by the single ratchet wheel is limited, especially when a doctor only slightly rotates the screw rod by a certain angle each time, the pawl cannot cross one ratchet wheel, so that the screw rod can rotate to the position before being not regulated (namely, the limit precision of the ratchet wheel to the screw rod is insufficient), under the condition that the outer diameter of the ratchet wheel is fixed, if the number of ratchet wheels is increased to improve the limit precision of the ratchet wheel to the screw rod, the strength of the ratchet wheel is reduced, and the like, and the problem that the ratchet wheel is broken during the rotation prevention possibly occurs, so that accidents such as mistaken swallowing of patients can occur.

Disclosure of Invention

The utility model aims to solve the technical problems that: an arch expander is provided to solve one or more technical problems existing in the prior art, and at least provides a beneficial choice or creation condition.

The utility model solves the technical problems as follows:

an arch expander, comprising:

a base;

the screw is in threaded connection with the base, and is provided with an adjusting hole;

the extending direction of the guide structure is parallel to the extending direction of the screw rod, and the guide structure is used for guiding the base;

the clamping structure comprises a ratchet body, a pawl body and a return spring, wherein the ratchet body and the pawl body are both rotationally connected with the base, the screw drives the ratchet body to rotate, the ratchet body is meshed with the pawl body, and the return spring is connected with the pawl body; the number of the clamping structures is at least two, and at least two ratchet bodies are arranged in a staggered mode.

Through the technical scheme, the positions of the two ratchet bodies of the two clamping structures are arranged in a staggered mode, so that the ratchet teeth and tooth grooves of the two ratchet bodies are staggered, and the limiting precision of the ratchet bodies is improved. In the case that the outer diameter of the ratchet wheel is fixed, the number of ratchet teeth of the ratchet wheel can be increased by arranging a plurality of ratchet wheels. The problems of excessive number of ratchets on the ratchet wheel, reduced strength of the ratchets and the like can be avoided, and the occurrence probability of accidents such as mistaken swallowing of patients caused by breakage of the ratchets during rotation prevention is reduced.

As a further improvement of the technical scheme, the adjusting hole is in a round hole shape.

Through the technical scheme, the round hole-shaped adjusting hole is convenient to process.

As a further improvement of the technical scheme, the device further comprises an arch expanding structure, and the arch expanding structure is fixedly connected with the base.

As a further improvement of the technical scheme, the ratchet body is connected with the screw in a sliding manner and rotates synchronously, the ratchet body and the pawl body are both connected with the base in a rotating manner, and the return spring enables the pawl body to keep in contact with the ratchet body.

Through the technical scheme, when the screw rod rotates, the ratchet body rotates along with the rotation of the screw rod, the reset spring can force the pawl body to keep in contact with the outer peripheral surface of the ratchet body in the rotation process of the ratchet body, the pawl body slides on the tooth back of the ratchet body, and when the ratchet body rotates until the pawl body corresponds to the next tooth slot, the pawl body enters the tooth slot under the action of the reset spring so as to prevent the ratchet body and the screw rod from reversing.

As a further improvement of the technical scheme, the novel ratchet comprises a ratchet cover, wherein the ratchet cover is arranged on the base, the clamping structure is arranged in the ratchet cover, and the screw rod penetrates through the ratchet cover.

Through above-mentioned technical scheme, the ratchet cover is used for playing shelter from and guard action to screens structure to avoid food waste to lead to screens structure inefficacy with screens structure contact.

As a further improvement of the technical scheme, the number of the base supports is two, the two base supports are respectively arranged at two ends of the screw rod, and threads at two ends of the screw rod are opposite.

Through the technical scheme, the two base supports are respectively connected with the two ends of the screw rod in a threaded manner, and the two ends of the screw rod are provided with two sections of opposite threads, so that the screw rod drives the two base supports to respectively move in opposite directions when rotating, and the two base supports can be adjusted simultaneously.

As a further improvement of the technical scheme, the guide structure comprises a guide rod and a guide hole, wherein the guide rod is fixedly connected with one of the base supports, the guide hole is formed in the other base support, and the guide rod is slidably connected with the guide hole.

Through the technical scheme, the base is guided by the cooperation of the guide holes and the guide rods.

As a further improvement of the technical scheme, the guide rod is arranged to be of a round rod structure, and the guide hole is arranged to be of a round hole structure.

Through above-mentioned technical scheme, round bar structure and round hole structure convenient processing.

As a further improvement of the above technical solution, there are at least two guiding structures.

As a further improvement of the above technical solution, at least two guide structures are respectively disposed on two sides of the screw.

The beneficial effects of the utility model are as follows: the positions of the two ratchet bodies of the two clamping structures are arranged in a staggered mode, so that the ratchet teeth and tooth grooves of the two ratchet bodies are staggered, and the limiting precision of the ratchet bodies is improved. In the case that the outer diameter of the ratchet wheel is fixed, the number of ratchet teeth of the ratchet wheel can be increased by arranging a plurality of ratchet wheels. The problems of excessive number of ratchets on the ratchet wheel, reduced strength of the ratchets and the like can be avoided, and the occurrence probability of accidents such as mistaken swallowing of patients caused by breakage of the ratchets during rotation prevention is reduced.

The utility model is used in the technical field of medical appliances.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present utility model, the drawings that are required to be used in the description of the embodiments will be briefly described below. It is evident that the drawings described are only some embodiments of the utility model, but not all embodiments, and that other designs and drawings can be obtained from these drawings by a person skilled in the art without inventive effort.

FIG. 1 is a schematic overall structure of an embodiment of the present utility model;

FIG. 2 is a schematic diagram of an exploded construction of an embodiment of the present utility model;

fig. 3 is a schematic cross-sectional view of an embodiment of the present utility model.

100, a base; 110. a ratchet cover; 200. an arch expanding structure; 300. a screw; 310. an adjustment aperture; 320. a connecting groove; 400. a guide structure; 410. a guide rod; 420. a guide hole; 500. a clamping structure; 510. ratchet body; 511. a connecting block; 520. a pawl body; 530. and a return spring.

Detailed Description

The conception, specific structure, and technical effects produced by the present utility model will be clearly and completely described below with reference to the embodiments and the drawings to fully understand the objects, features, and effects of the present utility model. It is apparent that the described embodiments are only some embodiments of the present utility model, but not all embodiments, and that other embodiments obtained by those skilled in the art without inventive effort are within the scope of the present utility model based on the embodiments of the present utility model. In addition, all coupling/connection relationships mentioned herein do not refer to direct connection of the components, but rather, refer to the fact that a more optimal coupling structure may be formed by adding or subtracting coupling aids depending on the particular implementation. The technical features in the utility model can be interactively combined on the premise of no contradiction and conflict.

In the description of the present utility model, it should be understood that references to orientation descriptions such as upper, lower, front, rear, left, right, etc. are based on the orientation or positional relationship shown in the drawings, are merely for convenience of description of the present utility model and to simplify the description, and do not indicate or imply that the apparatus or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the present utility model.

In the description of the present utility model, a number means one or more, a number means two or more, and greater than, less than, exceeding, etc. are understood to not include the present number, and above, below, within, etc. are understood to include the present number. The description of the first and second is for the purpose of distinguishing between technical features only and should not be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of the technical features indicated.

Referring to fig. 1 to 3, an arch expander includes a base 100, an arch expanding structure 200, a screw 300, a guide structure 400, and a click structure 500.

The middle part of screw 300 is equipped with regulation hole 310, and in this embodiment, regulation hole 310 sets up to the round hole, and the processing of circular hole structure is comparatively convenient, can effectively provide the production efficiency of expanding the bow ware. In other embodiments, the adjusting hole 310 may be configured as a regular hexagonal hole, a regular tetragonal hole, a regular triangle hole, a straight line hole, a cross hole, etc., so that a medical staff can insert into the adjusting hole 310 by using a corresponding tool, and drive the screw 300 to rotate under the driving of the tool. The screw 300 is prevented from being directly clamped by the forceps by medical staff and rotated, so that the injury of a patient caused by the slipping of the forceps is avoided.

The base 100 is a plastic member, the number of the base 100 is two, the two base 100 are respectively in threaded connection with two ends of the screw 300, and two opposite threads are formed at two ends of the screw 300, so that when the screw 300 rotates, the two base 100 are driven to move in opposite directions respectively, and the two base 100 can be adjusted simultaneously.

The ratchet cover 110 is installed at one end of the base 100, which is close to the middle of the screw 300, the ratchet cover 110 is fixedly connected with the base 100, specifically, the ratchet cover 110 is fixed with the base 100 through a structure such as a clamping structure or a screw, the ratchet cover 110 is assembled with the base 100 after the clamping structure 500 is installed, the ratchet cover 110 is provided with an opening, and the screw 300 penetrates through the ratchet cover 110.

The latch structure 500 is disposed in the ratchet cover 110, and the ratchet cover 110 is used for shielding and protecting the latch structure 500, so as to prevent the latch structure 500 from being disabled due to contact between food residues and the latch structure 500. The detent structure 500 includes a pawl body 520, a ratchet body 510, and a return spring 530. The pawl body 520 is rotationally connected with the base 100, two ends of the return spring 530 are respectively abutted with the base 100 and the pawl body 520, the return spring 530 is set to be a compression spring, and the end of the return spring 530 enables the end of the pawl body 520 to always have a trend of moving towards the rotation axis of the ratchet body 510, so that the ratchet body 520 can limit the ratchet body 510, and unidirectional movement of the ratchet body 510 is guaranteed.

The pawl 520 is driven by the screw 300, and when the screw 300 rotates, the pawl 520 is driven to rotate, specifically, the ratchet 510 protrudes out of the connecting block 511, and the connecting block 511 has a rectangular block structure; the screw 300 is provided with a connecting groove 320, and the connecting groove 320 has a rectangular groove structure (in other embodiments, the connecting block 511 and the connecting groove 320 may be configured as a dovetail shape or a T shape). The screw 300 passes through the ratchet body 510, the connecting block 511 on the ratchet body 510 is in clamping fit with the connecting groove 320 on the screw 300, and the connecting block 511 can slide along the extending direction of the connecting groove 320.

When the screw 300 rotates, since the connection block 511 is engaged with the connection groove 320, the ratchet body 510 rotates along with the rotation of the screw 300, the return spring 530 forces the pawl body 520 to keep in contact with the outer circumferential surface of the ratchet body 510 during the rotation of the ratchet body 510, the pawl body 520 slides over the back of the teeth of the ratchet body 510, and when the ratchet body 510 rotates until the pawl body 520 corresponds to the next tooth slot, the pawl body 520 enters the tooth slot due to the action of the return spring 530, so as to prevent the ratchet body 510 and the screw 300 from reversing.

During the relative rotation of the screw 300 and the base 100, the screw 300 is screwed with the base 100. The screw 300 can relatively move along the extending direction of the screw 300 relative to the base 100, and when the screw 300 relatively moves along the extending direction of the screw 300 relative to the base 100, the connection block 511 of the ratchet body 510 moves along the connection groove 320, so that the ratchet body 510 keeps following with the screw 300, so as to ensure that the clamping structure 500 can limit the rotating direction of the screw 300, and the screw 300 can only rotate unidirectionally.

The number of the two clamping structures 500 is two, the two clamping structures 500 are respectively mounted on the two bases 100 (in other embodiments, the two clamping structures 500 can be mounted on the same base 100), and the positions of the two ratchet bodies 510 of the two clamping structures 500 are staggered, so that the ratchet teeth and the tooth grooves of the two ratchet bodies 510 are staggered, and the limiting precision of the ratchet body 510 is improved.

The guide structure 400 includes a guide rod 410 and a guide hole 420, one end of the guide rod 410 is fixed to any one of the bases 100, and the other end is slidably connected to another of the bases 100 (in other embodiments, the middle portion of the guide rod 410 may be fixedly connected to a connecting member disposed between the two bases 100, and the middle portion of the screw 300 is rotatably connected to the connecting member). The guide rod 410 is configured as a round rod-like structure, and the guide hole 420 is configured as a round hole-like structure (in other embodiments, the guide rod 410 and the guide hole 420 may be configured as a triangular rod-like structure, a triangular hole-like structure, or a quadrangular rod-like structure, a quadrangular hole-like structure, etc.). The guide hole 420 is slidably connected with the guide rod 410, and the base 100 can be guided by arranging the guide rod 410 and the guide hole 420, so as to avoid larger deflection of the base 100.

The number of the guide structures 400 is two (in other embodiments, the number of the guide structures 400 may be three, four, etc., and may be designed according to actual needs), and the two guide structures 400 are respectively disposed on two sides of the screw 300. Two guide structures 400 located at both sides of the screw 300 may better guide the base 100.

The base 100 is fixedly connected with the bow-expanding structure 200, the bow-expanding structure 200 is arranged at one end of the base 100 far away from the middle part of the screw 300, and the bow-expanding structure 200 is used for expanding the bow.

While the preferred embodiments of the present utility model have been illustrated and described, the present utility model is not limited to the embodiments, and various equivalent modifications and substitutions can be made by one skilled in the art without departing from the spirit of the present utility model, and these are intended to be included in the scope of the present utility model as defined in the appended claims.

Claims

1. An arch expander, characterized in that: comprising the following steps:

a base;

2. An arch expander according to claim 1 and wherein: the adjusting hole is in a round hole shape.

3. An arch expander according to claim 1 and wherein: the device also comprises an expansion structure, wherein the expansion structure is fixedly connected with the base.

4. An arch expander according to claim 1 and wherein: the ratchet body and the screw rod are connected in a sliding mode and synchronously rotate, the ratchet body and the pawl body are connected with the base in a rotating mode, and the reset spring enables the pawl body to keep contact with the ratchet body.

5. An arch expander according to claim 1 and wherein: the novel ratchet comprises a base, a ratchet cover, a clamping structure and a screw rod, wherein the base is provided with a clamping structure, the clamping structure is arranged in the ratchet cover, and the screw rod penetrates through the ratchet cover.

6. An arch expander according to claim 1 and wherein: the number of the base supports is two, the two base supports are respectively arranged at two ends of the screw rod, and threads at two ends of the screw rod are opposite.

7. An arch expander according to claim 1 and wherein: the guide structure comprises guide rods and guide holes, wherein one guide rod is fixed with one base support, the guide holes are formed in the other base support, and the guide rods are connected with the guide holes in a sliding mode.

8. An arch expander according to claim 7 and wherein: the guide rod is of a round rod structure, and the guide hole is of a round hole structure.

9. An arch expander according to claim 7 and wherein: at least two guide structures are arranged.

10. An arch expander according to claim 9 and wherein: at least two guide structures are respectively arranged at two sides of the screw rod.