CN216754659U - Self-locking cross screwdriver head - Google Patents
Self-locking cross screwdriver head Download PDFInfo
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- CN216754659U CN216754659U CN202121290080.0U CN202121290080U CN216754659U CN 216754659 U CN216754659 U CN 216754659U CN 202121290080 U CN202121290080 U CN 202121290080U CN 216754659 U CN216754659 U CN 216754659U
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- head body
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Abstract
The utility model relates to a self-locking cross screwdriver head, which comprises a sleeve with a through hole inside, wherein the lower end of the sleeve is provided with an elastic clamping part for clamping the head part of an anchorage nail; the screwdriver rod can be constrained in the through hole in an axially reciprocating sliding manner, the lower end of the screwdriver rod is provided with an insertion hole with a polygonal cross section, and the upper end of the screwdriver rod penetrates out of the through hole to form a holding part exposed out of the sleeve; the screwdriver head body can be axially constrained in the through hole in a reciprocating sliding manner, the upper end of the screwdriver head body is inserted into the insertion hole, so that the screwdriver rod can rotate to drive the screwdriver head body to rotate together, the lower end of the screwdriver head body is provided with a cross rib which is used for being in insertion fit with a cross groove of the anchorage pin head part, and the elastic clamping part clamps the head part of the anchorage pin when the anchorage pin reversely pushes the screwdriver head body to move upwards to the retracted through hole; the first spring is restrained in the jack, and the screwdriver head body always has the trend of moving downwards relative to the sleeve, so that the screwdriver head is not easy to separate from the anchorage nail in the operation process.
Description
Technical Field
The utility model belongs to the technical field of medical instruments, and particularly relates to a self-locking cross screwdriver head.
Background
As society develops, the demand for quality of life is increasing, and more people seek orthodontic treatment to improve their smile, correct occlusal conditions of teeth or correct other problems caused by injury, disease or prolonged neglect of oral care. The current orthodontic treatment requires the shortest treatment period and the lowest patient matching requirement to obtain the best treatment effect. The micro-screw type implant anchorage just meets the requirements, and an ideal anchorage control effect is realized. The micro-screw type implant anchorage is a technology which is just started in recent years, micro-implant anchorage nails are implanted into bones, the bones are used as anchorage, the demand on anchorage in the correction process can be met, and the micro-screw type implant anchorage has become a hotspot of basic research of home and abroad orthodontic scholars. Compared with the traditional anchorage device, the device has the advantages of good biocompatibility, easy implantation, small volume, comfort, immediate loading, reasonable price and the like, and has the greatest advantages of good compliance independent of patients, minimum side effects and simpler malocclusion treatment.
When the existing metal anchorage nail in the market achieves the expected treatment effect or is loosened, the metal anchorage nail needs to be taken out (the periphery of the anchorage nail is disinfected by iodophor, and then the anchorage nail is screwed out in the opposite direction by a handle). At present, when the anchorage nail is implanted into preset positions such as alveolar bone and the like, screwdriver tools with connecting holes are adopted. Usually, in order to enable a screwdriver tool to smoothly sleeve the anchorage screw cap part, the connecting hole is slightly larger than the anchorage screw cap part in size, so that the anchorage screw is implanted by adopting the existing tool, the anchorage screw is easily implanted to be deviated or the implantation position is not accurate, and the anchorage screw is easy to fall off in the process of taking or implanting the anchorage screw and is inconvenient to take.
Therefore, the nail taking tool which is convenient to operate and is not easy to separate from the nail taking or implanting tool is designed, and the technical problem to be solved by the technical personnel in the field is solved.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the technical problem of providing a self-locking cross screwdriver head which is convenient to take or tighten nails and is not easy to separate from an anchorage nail in the operation process.
The technical scheme adopted by the utility model for solving the technical problems is as follows: the self-locking cross screwdriver head is characterized in that: comprises that
The sleeve is internally provided with a through hole, and the lower end of the sleeve is provided with an elastic clamping part for clamping the head part of the anchorage nail;
the screwdriver rod can be constrained in the through hole in an axially reciprocating sliding manner, the lower end of the screwdriver rod is provided with a jack with a polygonal cross section, and the upper end of the screwdriver rod penetrates out of the through hole to form a holding part exposed out of the sleeve;
the screwdriver head body can be axially constrained in the through hole in a reciprocating sliding manner, the upper end of the screwdriver head body is inserted into the insertion hole, so that the screwdriver rod can rotate to drive the screwdriver head body to rotate together, the lower end of the screwdriver head body is provided with a cross rib which is used for being in insertion fit with a cross groove of an anchorage nail head, and the elastic clamping part clamps the head of the anchorage nail in a state that the anchorage nail reversely pushes the screwdriver head body to move upwards to retract into the through hole;
the first spring is restrained in the insertion hole and enables the screwdriver head body to always have a downward moving trend relative to the sleeve.
In order to avoid that the sleeve moves downwards relative to the screwdriver rod to block the end part of the lower end of the screwdriver head body when the screwdriver head takes or screws a nail, a second spring is also restrained between the screwdriver rod and the sleeve, the second spring enables the sleeve to always have the tendency of moving upwards relative to the screwdriver rod, and the elastic coefficient of the second spring is smaller than that of the first spring. Meanwhile, the lower end head of the screwdriver head body is always exposed below the bottom surface of the elastic clamping part in a normal state.
In order to limit the upward moving degree of the sleeve relative to the screwdriver rod, a first step part is formed on the hole wall of the through hole, and the step surface of the first step part can be abutted against the lower end face of the screwdriver rod.
In order to facilitate production and assembly, the sleeve comprises a barrel body and a nut in threaded connection with the upper end of the barrel body, and the elastic clamping part is arranged at the lower end of the barrel body.
In order to limit the downward movement degree of the screwdriver head body relative to the sleeve, a second step part is formed on the wall of the through hole, a limiting convex part is formed on the peripheral wall of the screwdriver head body, and the lower end face of the limiting convex part can abut against the step surface of the second step part.
In order to enable the anchorage head nail and the screwdriver head body to be more firmly connected and matched in an inserting mode, a groove is formed in the center of the cross groove of the head portion of the anchorage head, and a protruding piece inserted into the groove is formed in the center of the cross rib of the screwdriver head body.
In order to make the structure of the elastic clamping part simpler, the lower end of the sleeve is provided with a plurality of elastic legs which are arranged at intervals along the circumference and extend downwards, and the elastic legs enclose the elastic clamping part.
The elastic clamping part is provided with a connecting hole and a clamping hole, the lower part of the screwdriver head body is positioned in the connecting hole under the condition that the anchorage nail reversely pushes the screwdriver head body to move upwards to retract into the through hole, and the head part of the anchorage nail is positioned in the clamping hole; the diameter of the connecting hole is smaller than that of the clamping hole.
Compared with the prior art, the utility model has the advantages that: when the nail is taken or screwed down, the cross rib at the lower end of the screwdriver head body is inserted into the cross groove of the anchorage nail head part, the periphery of the anchorage nail head part is clamped by the elastic clamping part, compared with the clamping locking of the cross rib groove of the screwdriver head body and the cross groove of the anchorage nail head part, the anchorage nail is firmly combined with the screwdriver head body by the clamping of the elastic clamping part, the good coaxiality of the anchorage nail and the screwdriver head in the operation process is ensured, the implantation precision of the anchorage nail is ensured, the anchorage nail is not easily separated from the screwdriver head under the clamping action of the elastic clamping part, and the falling of the nail taking and implanting process in the operation is prevented.
Drawings
FIG. 1 is a schematic perspective view of an embodiment of the present invention;
FIG. 2 is a longitudinal sectional view (when the driver bit body is coupled to the anchorage pin) of an embodiment of the present invention;
FIG. 3 is a longitudinal cross-sectional view of an embodiment of the present invention (when the elastic clamping portion clamps the anchorage pin);
fig. 4 is an exploded perspective view of an embodiment of the present invention.
Detailed Description
The utility model is described in further detail below with reference to the accompanying examples.
As shown in FIGS. 1 to 4, the preferred embodiment of the present invention is shown.
The self-locking cross screwdriver head in the embodiment comprises a sleeve 100, a screwdriver head body 3, a screwdriver rod 4, a first spring 5, a second spring 6 and other main parts.
As shown in fig. 2 to 4, the sleeve 100 includes a cylinder 1 and a nut 2, and the upper end of the cylinder 1 is threadedly coupled to the nut 2, thereby facilitating the production and assembly. A through hole 101 is formed in the sleeve 100; specifically, the through hole 101 is formed by the cylinder 1 and the nut 2 together.
The screwdriver head body 3 and the screwdriver rod 4 are both axially and reciprocally slidably constrained in the through hole 101. The lower extreme of screwdriver rod 4 is equipped with jack 41, and the first body 3 upper end of screwdriver is inserted and is located jack 41 to make screwdriver rod 4 and the first body 3 of screwdriver suit mutually and set up, and jack 41 cross section be the hexagon, and the first body 3 upper portion 34 cross section of screwdriver is the hexagon, makes the rotatory ability of screwdriver rod 4 drive screwdriver head body 3 and rotates together, thereby screws up or loosens anchorage nail 7 (see fig. 4). The first spring 5 is restrained in the insertion hole 41 so that the driver bit body 3 always has a tendency to move downward relative to the sleeve 100 (see fig. 2 to 3). The upper end of the screwdriver rod 4 penetrates through the upper end of the through hole 101 to form a holding part 42 exposed out of the sleeve 100. The lower end of the screwdriver head body 3 is provided with a cross rib 31 which is used for being in inserted connection with a cross groove 72 of the head part 71 of the anchorage nail 7; the lower end of the barrel 1 is provided with a plurality of elastic legs 12 which are arranged at intervals along the circumference and extend downwards, each elastic leg 12 is enclosed to form an elastic clamping part 13 (shown in figure 1), and the elastic clamping parts 13 clamp the head part 71 (shown in figure 3) of the anchorage nail 7 under the state that the anchorage nail 7 reversely pushes the screwdriver head body 3 to move upwards to the retraction through hole 101. The number of the elastic legs 12 in this embodiment is 4, and in other embodiments, the number of the elastic legs 12 can be increased or decreased according to actual requirements.
Compare in the card of the cross muscle groove 31 of only relying on screwdriver head body 3 and the cross groove 72 of anchorage nail 7 head 71 to join in marriage the locking, through the centre gripping of elasticity clamping part 13, anchorage nail 7 combines firmly with screwdriver head body 3, guarantee at the good axiality of operation in-process anchorage nail 7 and screwdriver head, ensure the precision that anchorage nail 7 was implanted, and anchorage nail 7 does not break away from the screwdriver head easily under the clamping action of elasticity clamping part 13, prevent to take out the nail and implant dropping of nail process in the operation.
A second spring 6 is restrained between the driver rod 4 and the sleeve 100, the second spring 6 is used for enabling the sleeve 100 to always have the upward moving trend relative to the driver rod 4, and the elastic coefficient of the second spring 6 is smaller than that of the first spring 5 (see figures 2-3). The peripheral wall of the screwdriver rod 4 is further provided with a conical part 43, the second spring 6 is sleeved on the screwdriver rod 4, the lower end of the second spring 6 abuts against the conical part 43, and the upper end of the second spring 6 abuts against the end face of the lower end of the nut 2 (see fig. 2-3).
As shown in fig. 2 to 4, a first stepped portion 14 is further formed on the inner peripheral wall of the cylinder 1, and a stepped surface of the first stepped portion 14 can abut against the lower end surface of the driver rod 4, thereby limiting the degree of upward movement of the sleeve 100 with respect to the driver rod 4. The inner peripheral wall of the cylinder 1 is further formed with a second step 15, the peripheral wall of the screwdriver head body 3 is formed with a limit convex part 32, and the lower end surface of the limit convex part 32 can be abutted against the step surface of the second step 15, so that the downward movement degree of the screwdriver head body 3 relative to the sleeve 100 is limited. In this embodiment, the limit protrusion 32 can abut against the lower end surface of the driver rod 4, and thus the degree of upward movement of the driver bit body 3 relative to the driver rod 4 can be limited.
As shown in fig. 4, the elastic clamping portion 13 has a connecting hole 16 and a clamping hole 17, and in a state that the anchorage pin 7 is pushed reversely to move the screwdriver bit body 3 upwards into the retraction through hole 101, the lower part of the screwdriver bit body 3 is located in the connecting hole 16, and the head 71 of the anchorage pin 7 is located in the clamping hole 17; the diameter of the coupling hole 16 is smaller than that of the holding hole 17. In this embodiment, the coupling hole 16 and the holding hole 17 are coupled through the tapered hole 11 inside the elastic holding portion 13.
As shown in FIGS. 2 to 4, a groove 73 is formed in the center of the cross groove 72 of the head 71 of the anchorage nail 7, and a protruding piece 33 inserted into the groove 73 is formed in the center of the cross rib 31 of the screwdriver head body 3.
The working principle of the self-locking cross screwdriver head in the embodiment is as follows:
before the nail is taken or screwed (namely, the self-locking cross screwdriver head is in a natural state), the lower end face of the limiting convex part 32 of the screwdriver head body 3 is abutted against the step face of the second step part 15, the step face of the first step part 14 is separated from the lower end face of the screwdriver rod 4 (see fig. 2), and the lower end head part of the screwdriver head body 3 is exposed below the bottom face of the elastic clamping part 13 under the combined action of the first spring 5 and the second spring 6.
When the nail is taken out or screwed down, the cross rib 31 at the lower end part of the screwdriver head body 3 is inserted into the cross groove 72 of the head part 71 of the anchorage nail 7, and the convex piece 33 is inserted into the groove 73 (see figure 2). The holding part 42 of the hand-held screwdriver rod 4 presses the anchorage nail 7 downwards, so that the anchorage nail 7 reversely pushes the screwdriver head body 3 to overcome the elastic force of the first spring 5, the screwdriver head body 3 moves upwards relative to the screwdriver rod 4 to the retraction through hole 101, the lower part of the screwdriver head body 3 is positioned in the connecting hole 16, the head 71 of the anchorage nail 7 is positioned in the clamping hole 17, and the elastic clamping part 13 clamps the head 71 of the anchorage nail 7, at the moment, after the upper end surface of the limiting convex part 32 is abutted against the lower end surface of the screwdriver rod 4, the step surface of the first step part 14 is abutted against the lower end surface of the screwdriver rod 4 (see fig. 3).
It should be noted that in the description of the present embodiment, the terms "front, back", "left, right", "upper, lower", etc. indicate the orientations or positional relationships based on the orientations or positional relationships shown in the drawings, which are only for convenience of describing the present invention and simplifying the description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed in a specific orientation, and operate, and thus, should not be construed as limiting the present invention. The terms "mounted," "connected," and "coupled" are to be construed broadly and may, for example, be fixedly coupled, detachably coupled, or integrally coupled; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Although preferred embodiments of the present invention have been described in detail hereinabove, it should be clearly understood that modifications and variations of the present invention are possible to those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (8)
1. The self-locking cross screwdriver head is characterized in that: comprises that
A sleeve (100) which is internally provided with a through hole (101) and the lower end of which is provided with an elastic clamping part (13) for clamping the head part (71) of the anchorage nail (7);
the screwdriver rod (4) can be constrained in the through hole (101) in an axially reciprocating sliding manner, the lower end of the screwdriver rod (4) is provided with a jack (41) with a polygonal cross section, and the upper end of the screwdriver rod (4) penetrates through the through hole (101) to form a holding part (42) exposed out of the sleeve (100);
the screwdriver head body (3) can be constrained in the through hole (101) in an axially reciprocating sliding manner, the upper end of the screwdriver head body (3) is inserted into the jack (41) so that the screwdriver rod (4) can rotate to drive the screwdriver head body (3) to rotate together, the lower end of the screwdriver head body (3) is provided with a cross rib (31) which is used for being in plug-in fit with a cross groove (72) of the head (71) of the anchorage nail (7), and the elastic clamping part (13) clamps the head (71) of the anchorage nail (7) in a state that the anchorage nail (7) reversely pushes the screwdriver head body (3) to move upwards to retract into the through hole (101);
a first spring (5) constrained in the receptacle (41) and always having a tendency to move downwards the screwdriver head body (3) with respect to the sleeve (100).
2. The self-locking cross screwdriver head as recited in claim 1, wherein: a second spring (6) is also restrained between the screwdriver rod (4) and the sleeve (100), the second spring (6) enables the sleeve (100) to always have the upward movement tendency relative to the screwdriver rod (4), and the elastic coefficient of the second spring (6) is smaller than that of the first spring (5).
3. The self-locking cross screwdriver head as recited in claim 1, wherein: a first step part (14) is formed on the wall of the through hole (101), and the step surface of the first step part (14) can be abutted against the lower end face of the screwdriver rod (4).
4. The self-locking cross screwdriver head as recited in any one of claims 1 to 3, wherein: the sleeve (100) comprises a cylinder body (1) and a nut (2) in threaded connection with the upper end of the cylinder body (1), and the elastic clamping part (13) is arranged at the lower end of the cylinder body (1).
5. The self-locking cross screwdriver head as recited in any one of claims 1 to 3, wherein: a second step part (15) is formed on the hole wall of the through hole (101), a limiting convex part (32) is formed on the peripheral wall of the screwdriver head body (3), and the lower end face of the limiting convex part (32) can be abutted against the step face of the second step part (15).
6. The self-locking cross screwdriver head as recited in any one of claims 1 to 3, wherein: a groove (73) is formed in the center of a cross groove (72) of the head portion (71) of the anchorage nail (7), and a protruding piece (33) inserted into the groove (73) is formed in the center of a cross rib (31) of the screwdriver head body (3).
7. The self-locking cross screwdriver head as recited in any one of claims 1 to 3, wherein: the lower end of the sleeve (100) is provided with a plurality of elastic legs (12) which are arranged at intervals along the circumference and extend downwards, and each elastic leg (12) is enclosed to form the elastic clamping part (13).
8. The self-locking cross screwdriver head as recited in claim 7, wherein: the elastic clamping part (13) is provided with a connecting hole (16) and a clamping hole (17), the lower part of the screwdriver head body (3) is positioned in the connecting hole (16) and the head part (71) of the anchorage nail (7) is positioned in the clamping hole (17) under the condition that the anchorage nail (7) reversely pushes the screwdriver head body (3) to move upwards to retract into the through hole (101); the diameter of the connecting hole (16) is smaller than that of the clamping hole (17).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121290080.0U CN216754659U (en) | 2021-06-09 | 2021-06-09 | Self-locking cross screwdriver head |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121290080.0U CN216754659U (en) | 2021-06-09 | 2021-06-09 | Self-locking cross screwdriver head |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216754659U true CN216754659U (en) | 2022-06-17 |
Family
ID=81953712
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121290080.0U Active CN216754659U (en) | 2021-06-09 | 2021-06-09 | Self-locking cross screwdriver head |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216754659U (en) |
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2021
- 2021-06-09 CN CN202121290080.0U patent/CN216754659U/en active Active
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