阅读说明：本技术 防松脱的积木结构 (Anti-loose building block structure ) 是由 林芳毅 于 2020-03-04 设计创作，主要内容包括：本发明公开了一种防松脱的积木结构,主要包含有：至少一接杆,该接杆的至少一端轴向凸伸有一第一结合凸部,该第一结合凸部的外周面上形成有至少一外螺纹,该第一结合凸部的外周面上设有至少一第一防脱环,该第一防脱环呈断续地径向环绕凸起在该第一结合凸部的外周面上；一接头单元,具有至少一接头,该接头的至少一端轴向往内凹陷有一结合凹部,该结合凹部的内周面上形成有一正逆牙螺槽,该正逆牙螺槽由一至数条正螺槽与一至数条逆螺槽间隔交替设置所构成；该接杆的外螺纹可与该接头的正逆牙螺槽螺接,并由该第一防脱环防止该外螺纹自行与该正逆牙螺槽松脱,进而达到防止松脱的功效。(The invention discloses a loose-proof building block structure, which mainly comprises: at least one connecting rod, wherein at least one end of the connecting rod axially protrudes and extends with a first combining convex part, the outer peripheral surface of the first combining convex part is provided with at least one external thread, the outer peripheral surface of the first combining convex part is provided with at least one first anti-slip ring, and the first anti-slip ring intermittently and radially surrounds and protrudes on the outer peripheral surface of the first combining convex part; the joint unit is provided with at least one joint, at least one end of the joint is axially inwards recessed with a combination concave part, the inner circumferential surface of the combination concave part is provided with a positive and negative thread groove, and the positive and negative thread groove is formed by alternately arranging one to a plurality of positive thread grooves and one to a plurality of negative thread grooves at intervals; the external thread of the connecting rod can be in threaded connection with the positive and negative thread groove of the joint, and the first anti-loosening ring prevents the external thread from loosening from the positive and negative thread groove, so that the loosening prevention effect is achieved.)

1. A kind of anti-loose building block structure, mainly include:

at least one connecting rod, wherein at least one end of the connecting rod axially protrudes and extends with a first combining convex part, the outer peripheral surface of the first combining convex part is provided with at least one external thread, the outer peripheral surface of the first combining convex part is provided with at least one first anti-slip ring, and the first anti-slip ring intermittently and radially surrounds and protrudes on the outer peripheral surface of the first combining convex part;

a joint unit having at least one joint, at least one end of the joint being recessed axially inward to form a coupling recess, the inner peripheral surface of the coupling recess being formed with a positive and negative thread groove, the positive and negative thread groove being formed by alternately arranging at least one positive thread groove and at least one negative thread groove, the junction of the positive and negative thread grooves forming a plurality of thread groove peaks;

the external thread of the connecting rod is in threaded connection with the positive and negative thread groove of the joint, the thread groove edge peak and the first anti-drop ring cross each other and are clamped on the side edge of the corresponding first anti-drop ring by the thread groove edge peak, therefore, when the connecting rod or the joint is slightly touched, the thread groove edge peak is just clamped on the side edge of the first anti-drop ring, the connecting rod and the joint are prevented from being mistakenly touched and reversely rotated to be separated, the first anti-drop ring prevents the external thread from automatically dropping off from the positive and negative thread groove, and further the effect of preventing the dropping off is achieved; when the connecting rod or the joint is subjected to the rotation action of an external force, the thread groove edge and the first anti-drop ring cross each other, so that the connecting rod is separated from the joint.

2. The anti-loosening building block structure according to claim 1, characterized in that: the connecting rod is made of plastic material with elastic deformation capability; the joint is made of plastic material with elastic deformation capability.

3. The anti-loosening building block structure according to claim 1, characterized in that: the connecting rod is also provided with a holding part, the first combining convex part is formed by axially protruding from one end of the holding part, and the maximum outer diameter of the first combining convex part is smaller than the outer diameter of the holding part.

4. A block construction for locking against release according to claim 3, characterised in that: the outer peripheral surface of the holding part is provided with a slip-resistant line.

5. The anti-loosening building block structure according to claim 1, characterized in that: the other end of the connecting rod is a motor connecting part for connecting with a motor.

6. The anti-loosening building block structure according to claim 1, characterized in that: the external thread on the first combining convex part is an orthodontic external thread.

7. The anti-loosening building block structure according to claim 1, characterized in that: the external thread on the first combining convex part is a reverse thread.

8. The anti-loosening building block structure according to claim 1, characterized in that: the first combining convex part of the connecting rod is conical, and the outer diameter of the first combining convex part is gradually enlarged from the outer end to the inner end of the first combining convex part; the joint concave part of the joint is conical, and the inner diameter of the joint concave part is gradually reduced from the outer end to the inner end of the joint concave part.

9. The anti-loosening building block structure according to claim 1, characterized in that: the inner end edge of the first combination convex part of the extension rod is provided with a first packing ring, the outer diameter of the first packing ring is larger than the maximum outer diameter of the first combination convex part, and the outer diameter of the outer end of the first packing ring is larger than the outer diameter of the inner end of the first packing ring; the outer end of the combining concave part of the joint is provided with a packing groove, and the inner diameter of the packing groove is smaller than the outer diameter of the outer end of the first packing ring of the connecting rod and is equal to the outer diameter of the inner end of the first packing ring.

10. The anti-loosening building block structure according to claim 1, characterized in that: the other end of the connecting rod axially protrudes and extends with a second combination convex part, at least one external thread is formed on the peripheral surface of the second combination convex part, the external thread on the second combination convex part and the external thread on the first combination convex part are in opposite rotating directions, at least one second anti-falling ring is arranged on the peripheral surface of the second combination convex part, and the second anti-falling ring intermittently and radially surrounds and protrudes on the peripheral surface of the second combination convex part.

11. The anti-release building block structure of claim 10, wherein: the second combining convex part of the connecting rod is conical, and the outer diameter of the second combining convex part is gradually enlarged from the outer end to the inner end of the second combining convex part; the joint concave part of the joint is conical, and the inner diameter of the joint concave part is gradually reduced from the outer end to the inner end of the joint concave part.

12. The anti-release building block structure of claim 10, wherein: the inner end edge of the second combination convex part of the connecting rod is provided with a second packing ring, the outer diameter of the second packing ring is larger than the maximum outer diameter of the second combination convex part, and the outer diameter of the outer end of the second packing ring is larger than the outer diameter of the inner end of the second packing ring; the outer end of the combining concave part of the joint is provided with a packing groove, and the inner diameter of the packing groove is smaller than the outer diameter of the outer end of the second packing ring of the connecting rod and is equal to the outer diameter of the inner end of the second packing ring.

13. The anti-loosening building block structure according to claim 1, characterized in that: the joint is also provided with a holding part, and the combining concave part is formed by axially inwards sinking from one end of the holding part.

14. The anti-loosening building block structure according to claim 1, characterized in that: the joint unit also comprises one to a plurality of short coaxial double joints and one to a plurality of long coaxial double joints; the short coaxial double joint is a short shaft pipe body with two through ends, each end is provided with a combination concave part, each combination concave part is internally provided with a positive and negative thread groove, and each positive and negative thread groove is formed by alternately arranging one to a plurality of positive thread grooves and one to a plurality of negative thread grooves at intervals; the long coaxial double joint is a long shaft pipe body with two through ends, each end is provided with a combining concave part, each combining concave part is internally provided with a positive and negative thread groove, and each positive and negative thread groove is formed by alternately arranging one to a plurality of positive thread grooves and one to a plurality of negative thread grooves at intervals.

15. The anti-loosening building block structure according to claim 1, characterized in that: the joint unit also comprises one to a plurality of right-angle double joints and one to a plurality of T-shaped triple joints; the right-angle double joint is formed by two pipe bodies in a right angle, each pipe body is provided with a combination concave part, each combination concave part is internally provided with an orthodontics thread groove, and each orthodontics thread groove is formed by alternately arranging one to a plurality of orthodontics thread grooves and one to a plurality of inverse thread grooves at intervals; the outer side surface of the T-shaped three-joint forms three combining concave parts, each combining concave part is internally provided with a positive and negative thread groove, and each positive and negative thread groove is formed by alternately arranging one to a plurality of positive thread grooves and one to a plurality of negative thread grooves at intervals.

16. The anti-loosening building block structure according to claim 1, characterized in that: the joint unit also comprises one to a plurality of coaxial double joints of the attached shaft pipes, one to a plurality of right-angle double joints of the attached shaft pipes, one to a plurality of T-shaped triple joints of the attached shaft pipes, one to a plurality of cross-shaped quadruple joints of the attached shaft pipes and one to a plurality of equiangular triple joints of the attached shaft pipes; the coaxial double joint of the attached shaft pipe forms a combining concave part on the opposite outer ring surface of a shaft pipe with a through hole respectively, a positive and negative thread groove is arranged in each combining concave part, and each positive and negative thread groove is formed by alternately arranging one to a plurality of positive thread grooves and one to a plurality of negative thread grooves at intervals; the right-angle double joint of the auxiliary shaft pipe forms a combining concave part at a right angle on the outer annular surface of a shaft pipe with a through hole, a positive and negative thread groove is arranged in each combining concave part, and each positive and negative thread groove is formed by alternately arranging one to a plurality of positive thread grooves and one to a plurality of negative thread grooves at intervals; the T-shaped three-joint of the attached shaft tube forms three combining concave parts on the outer ring surface of a shaft tube with a through hole, each combining concave part is internally provided with a positive and negative thread groove, and each positive and negative thread groove is formed by alternately arranging one to a plurality of positive thread grooves and one to a plurality of negative thread grooves at intervals; the cross four-joint of the attached shaft pipe forms four combining concave parts on the outer ring surface of a shaft pipe with a through hole, the combining concave parts are arranged at right angles, a positive and negative thread groove is arranged in each combining concave part, and each positive and negative thread groove is formed by alternately arranging one to a plurality of positive thread grooves and one to a plurality of negative thread grooves at intervals; the shaft-attached tube equiangular three-joint forms three combining concave parts on the outer ring surface of a shaft tube with a through hole, the combining concave parts are arranged at equal angles, each combining concave part is internally provided with a positive and negative thread groove, and each positive and negative thread groove is formed by alternately arranging one to a plurality of positive thread grooves and one to a plurality of negative thread grooves at intervals.

17. The anti-loosening building block structure as claimed in claim 1, wherein: the joint unit also comprises one to a plurality of right-angle C-shaped clamping single joints and one to a plurality of bevel-angle C-shaped clamping single joints; the right-angle C-shaped clamp single joint is characterized in that a combining concave part is formed on the side surface of a C-shaped clamp, a positive and negative thread groove is formed in each combining concave part, each positive and negative thread groove is formed by alternately arranging one to a plurality of positive thread grooves and one to a plurality of negative thread grooves at intervals, and the C-shaped clamp and the combining concave part are vertically arranged; the oblique angle C-shaped clamp single joint is characterized in that a combining concave part is formed on the side surface of a C-shaped clamp, each combining concave part is internally provided with an orthodontics thread groove, each orthodontics thread groove is formed by alternately arranging one or more orthodontics thread grooves and one or more inverse thread grooves at intervals, and the C-shaped clamp and the combining concave part are obliquely arranged.

Technical Field

The present invention relates to building blocks, and more particularly to a structure of anti-loose building blocks.

Background

The building block is a toy for training the coordination ability of brain, hands and eyes, and is very suitable for the development of training creativity because the playing method and the combination mode have various variability.

Although there are many kinds of building blocks on the market, there are building blocks stacked with block bodies of different geometric patterns, or building blocks in which a concave portion and a convex portion are provided on each block for engagement, or building blocks in which screw threads are provided. However, these building blocks are easy to loosen and separate by themselves or by slight touch.

The present application is an improvement of taiwan patent No. I538722 (hereinafter referred to as "conventional case"), which is the prior invention of the present inventor and has been applied for multi-national patents at the same time.

Accordingly, the present invention is directed to solve the problem of the prior art that the conventional building blocks are easy to loosen and separate.

Disclosure of Invention

The invention aims to provide a building block structure for preventing looseness, which can avoid separation caused by looseness.

Accordingly, to achieve the above objects, the present invention provides an anti-loose building block structure, mainly comprising: at least one connecting rod, at least one end of which axially protrudes and extends with a first combining convex part, the outer peripheral surface of the first combining convex part is provided with at least one external thread, the outer peripheral surface of the first combining convex part is provided with at least one first anti-slip ring, and the first anti-slip ring intermittently and radially surrounds and protrudes on the outer peripheral surface of the first combining convex part; a joint unit having at least one joint, at least one end of the joint having a combination recess recessed axially inwards, the inner peripheral surface of the combination recess having a positive and negative thread groove formed thereon, the positive and negative thread groove being formed by alternately arranging at least one positive thread groove and at least one negative thread groove, the junction of the positive and negative thread grooves forming a plurality of thread groove peaks;

the external thread of the connecting rod is in threaded connection with the positive and negative thread groove of the joint, the thread groove edge peak and the first anti-drop ring cross each other and are clamped on the side edge of the corresponding first anti-drop ring by the thread groove edge peak, therefore, when the connecting rod or the joint is slightly touched, the thread groove edge peak is just clamped on the side edge of the first anti-drop ring, the connecting rod and the joint are prevented from being mistakenly touched and reversely rotated to be separated, the first anti-drop ring prevents the external thread from automatically dropping off from the positive and negative thread groove, and further the effect of preventing the dropping off is achieved; when the connecting rod or the joint is subjected to the rotation action of an external force, the thread groove edge and the first anti-drop ring cross each other, so that the connecting rod is separated from the joint.

Furthermore, the connecting rod is integrally made of plastic materials with elastic deformation capacity; the joint is made of plastic material with elastic deformation capability.

Furthermore, the extension rod is also provided with a holding part, the first combining convex part is formed by axially protruding from one end of the holding part, and the maximum outer diameter of the first combining convex part is smaller than the outer diameter of the holding part.

Furthermore, the outer peripheral surface of the holding part is provided with a slip-proof line.

Furthermore, the other end of the connecting rod is a motor connecting part for connecting with a motor.

Further, the external thread on the first combining convex part is an orthodontic external thread.

Further, the external thread on the first combining convex part is a reverse thread.

Furthermore, the first combining convex part of the extension rod is conical, and the outer diameter of the first combining convex part is gradually enlarged from the outer end to the inner end of the first combining convex part; the joint concave part of the joint is conical, and the inner diameter of the joint concave part is gradually reduced from the outer end to the inner end of the joint concave part.

Furthermore, a first packing ring is arranged on the inner end edge of the first combination convex part of the extension rod, the outer diameter of the first packing ring is larger than the maximum outer diameter of the first combination convex part, and the outer diameter of the outer end of the first packing ring is larger than the outer diameter of the inner end of the first packing ring; the outer end of the combining concave part of the joint is provided with a packing groove, and the inner diameter of the packing groove is smaller than the outer diameter of the outer end of the first packing ring of the connecting rod and is equal to the outer diameter of the inner end of the first packing ring.

Furthermore, a second combination convex part axially protrudes from the other end of the connecting rod, at least one external thread is formed on the outer peripheral surface of the second combination convex part, the external thread on the second combination convex part and the external thread on the first combination convex part are in opposite rotation directions, at least one second anti-slip ring is arranged on the outer peripheral surface of the second combination convex part, and the second anti-slip ring intermittently and radially surrounds and protrudes on the outer peripheral surface of the second combination convex part.

Furthermore, the second combining convex part of the connecting rod is in a cone shape, and the outer diameter of the second combining convex part is gradually enlarged from the outer end to the inner end of the second combining convex part; the joint concave part of the joint is conical, and the inner diameter of the joint concave part is gradually reduced from the outer end to the inner end of the joint concave part.

Furthermore, a second packing ring is arranged on the inner end edge of the second combination convex part of the connecting rod, the outer diameter of the second packing ring is larger than the maximum outer diameter of the second combination convex part, and the outer diameter of the outer end of the second packing ring is larger than the outer diameter of the inner end of the second packing ring; the outer end of the combining concave part of the joint is provided with a packing groove, and the inner diameter of the packing groove is smaller than the outer diameter of the outer end of the second packing ring of the connecting rod and is equal to the outer diameter of the inner end of the second packing ring.

Furthermore, the joint is also provided with a holding part, and the combining concave part is formed by axially inwards sinking from one end of the holding part.

Furthermore, the joint unit also comprises one to a plurality of short coaxial double joints and one to a plurality of long coaxial double joints; the short coaxial double joint is a short shaft pipe body with two through ends, each end is provided with a combination concave part, each combination concave part is internally provided with a positive and negative thread groove, and each positive and negative thread groove is formed by alternately arranging one to a plurality of positive thread grooves and one to a plurality of negative thread grooves at intervals; the long coaxial double joint is a long shaft pipe body with two through ends, each end is provided with a combining concave part, each combining concave part is internally provided with a positive and negative thread groove, and each positive and negative thread groove is formed by alternately arranging one to a plurality of positive thread grooves and one to a plurality of negative thread grooves at intervals.

Furthermore, the joint unit also comprises one to a plurality of right-angle double joints and one to a plurality of T-shaped triple joints; the right-angle double joint is formed by two pipe bodies in a right angle, each pipe body is provided with a combination concave part, each combination concave part is internally provided with an orthodontics thread groove, and each orthodontics thread groove is formed by alternately arranging one to a plurality of orthodontics thread grooves and one to a plurality of inverse thread grooves at intervals; the outer side surface of the T-shaped three-joint forms three combining concave parts, each combining concave part is internally provided with a positive and negative thread groove, and each positive and negative thread groove is formed by alternately arranging one to a plurality of positive thread grooves and one to a plurality of negative thread grooves at intervals.

Furthermore, the joint unit also comprises one to a plurality of coaxial double joints of the attached shaft pipes, one to a plurality of right-angle double joints of the attached shaft pipes, one to a plurality of T-shaped triple joints of the attached shaft pipes, one to a plurality of cross-shaped quadruple joints of the attached shaft pipes and one to a plurality of equiangular triple joints of the attached shaft pipes; the coaxial double joint of the attached shaft pipe forms a combining concave part on the opposite outer ring surface of a shaft pipe with a through hole respectively, a positive and negative thread groove is arranged in each combining concave part, and each positive and negative thread groove is formed by alternately arranging one to a plurality of positive thread grooves and one to a plurality of negative thread grooves at intervals; the right-angle double joint of the auxiliary shaft pipe forms a combining concave part at a right angle on the outer annular surface of a shaft pipe with a through hole, a positive and negative thread groove is arranged in each combining concave part, and each positive and negative thread groove is formed by alternately arranging one to a plurality of positive thread grooves and one to a plurality of negative thread grooves at intervals; the T-shaped three-joint of the attached shaft tube forms three combining concave parts on the outer ring surface of a shaft tube with a through hole, each combining concave part is internally provided with a positive and negative thread groove, and each positive and negative thread groove is formed by alternately arranging one to a plurality of positive thread grooves and one to a plurality of negative thread grooves at intervals; the cross four-joint of the attached shaft pipe forms four combining concave parts on the outer ring surface of a shaft pipe with a through hole, the combining concave parts are arranged at right angles, a positive and negative thread groove is arranged in each combining concave part, and each positive and negative thread groove is formed by alternately arranging one to a plurality of positive thread grooves and one to a plurality of negative thread grooves at intervals; the shaft-attached tube equiangular three-joint forms three combining concave parts on the outer ring surface of a shaft tube with a through hole, the combining concave parts are arranged at equal angles, each combining concave part is internally provided with a positive and negative thread groove, and each positive and negative thread groove is formed by alternately arranging one to a plurality of positive thread grooves and one to a plurality of negative thread grooves at intervals.

Furthermore, the joint unit also comprises one to a plurality of right-angle C-shaped clamping single joints and one to a plurality of bevel C-shaped clamping single joints; the right-angle C-shaped clamp single joint is provided with a combination concave part on the side surface of a C-shaped clamp, each combination concave part is internally provided with an orthodontics and inverse dentition screw groove, each orthodontics and inverse dentition screw groove is formed by alternately arranging one to a plurality of orthodontics and inverse dentition screw grooves at intervals, and the C-shaped clamp and the combination concave part are vertically arranged; the oblique angle C-shaped clamp single joint is characterized in that a combining concave part is formed on the side surface of a C-shaped clamp, each combining concave part is internally provided with an orthodontics thread groove, each orthodontics thread groove is formed by alternately arranging one or more orthodontics thread grooves and one or more inverse thread grooves at intervals, and the C-shaped clamp and the combining concave part are obliquely arranged.

By adopting the technical scheme, the external thread of the connecting rod can be in threaded connection with the positive and negative tooth thread groove of the joint, and the first anti-loosening ring prevents the external thread from loosening from the positive and negative tooth thread groove, so that the effect of preventing loosening is achieved.

Drawings

Fig. 1 is a perspective view of a connection rod according to a preferred embodiment of the present invention.

FIG. 2 is a perspective view of an extension bar according to another embodiment of the present invention.

FIG. 3 is a side view of the extension rod according to a preferred embodiment of the present invention.

Fig. 4 is a perspective view of a joint according to a preferred embodiment of the present invention (illustrating the trajectory of a positive thread groove).

Fig. 5 is a perspective view of a connector according to a preferred embodiment of the present invention. (to show the trajectory of the inverse groove).

Fig. 6 is a perspective view of a connector according to a preferred embodiment of the present invention. (to simultaneously indicate the trajectories of the forward and reverse flights).

FIG. 7 is a perspective and partial cross-sectional view of a connecting rod and a connector before being combined according to a preferred embodiment of the present invention.

FIG. 8 is a cross-sectional view of a connecting rod and a joint before being combined according to a preferred embodiment of the present invention.

FIG. 9 is a perspective and partial cross-sectional view of the connecting rod and the joint after being combined according to a preferred embodiment of the present invention.

FIG. 10 is a cross-sectional view of the extension rod and the joint after being combined according to a preferred embodiment of the present invention.

FIG. 11 is a perspective view of an embodiment of a connection rod according to a preferred embodiment of the present invention.

FIG. 12 is a perspective view of another embodiment of the connecting rod according to a preferred embodiment of the present invention.

FIG. 13 is a perspective view of a connecting rod according to another embodiment of the present invention.

FIG. 14 is a perspective view of a connection rod according to still another embodiment of the present invention.

FIGS. 15a to 15k are perspective views of various joint aspects of the invention.

Fig. 16 is a perspective view of an assembly of the present invention.

Fig. 17 is a perspective view of another assembly of the present invention.

[ notation ] to show

Anti-loose building block structure 100

Connecting rod 10

First coupling protrusion 12 of grip 11

Orthodontic external thread 121 first anti-drop ring 122

Second coupling protrusion 13 reverse thread male screw 131

Second anti-slip ring 132 first packing ring 14

The second packing ring 15 has anti-slip lines 16

Motor connecting part 17 joint unit 20

Holding part 211 of joint 21

Coupling recess 212 positive and negative tooth screw groove 213

Reverse spiral groove 214 and forward spiral groove 215

Spiral groove side peak 217 of tightening groove 216

Short coaxial double joint 31 combining concave part 312

Long coaxial double joint 32 with positive and negative tooth screw groove 313

Coupling recess 322 positive and negative tooth thread groove 323

Right angle double joint 33 joins recess 332

Double coaxial joint 34 with shaft tube for positive and negative tooth screw groove 333

Through hole 348 axle tube 349

Coupling concave portion 342 positive and negative tooth thread groove 343

Right-angle double-joint 35 through hole 358 with shaft tube

Shaft tube 359 engages recess 352

T-shaped three-joint 36 with positive and negative tooth screw grooves 353 attached with axle tube

Through hole 368 shaft tube 369

Engaging recess 362 positive and negative teeth screw groove 363

Cross four-joint 37 through hole 378 with shaft tube

Shaft tube 379 combination concave part 372

Equiangular three-joint 38 with shaft-attached pipe for positive and negative tooth screw groove 373

Through-hole 388 axle tube 389

Positive and negative tooth screw groove 383 of combining concave part 382

Right angle C-clamp single joint 39C-clamp 398

Coupling recess 392 positive and negative tooth thread groove 393

Bevel angle C-clamp single joint 41C-clamp 418

Positive and negative tooth thread groove 413 of combining concave part 412

T-shaped three-joint 42 combining concave part 422

The orthodontic screw groove 423.

Detailed Description

For a further understanding and appreciation of the features and characteristics of the present invention, reference is made to the following examples, taken in conjunction with the accompanying drawings, in which:

referring to fig. 1 to 17, a block structure 100 for preventing loosening according to a preferred embodiment of the present invention mainly includes at least one connecting rod 10 and a connector unit 20, wherein:

referring to fig. 1 to 3, the extension rod 10 is integrally made of a plastic material with a slight elastic deformation capability. The extension rod 10 has a holding portion 11, a first coupling protrusion 12 axially protruding from one end of the holding portion 11, and a second coupling protrusion 13 axially protruding from the other end of the holding portion 11. The first coupling protrusion 12 is tapered, and gradually increases in outer diameter from an outer end to an inner end of the first coupling protrusion 12, and the maximum outer diameter of the first coupling protrusion 12 is smaller than the outer diameter of the grip 11, and one to several external threads are formed on an outer circumferential surface of the first coupling protrusion 12, in this embodiment, four orthodontic external threads 121 are formed on an outer circumferential surface of the first coupling protrusion 12 at intervals, and one to several first anti-slip rings 122 are formed on an outer circumferential surface of the first coupling protrusion 12, and each first anti-slip ring 122 is blocked by the orthodontic external threads 121 to intermittently protrude around the outer circumferential surface of the first coupling protrusion 12. The second coupling protrusion 13 is tapered, the outer diameter of the second coupling protrusion 13 gradually increases from the outer end to the inner end, the maximum outer diameter of the second coupling protrusion 13 is smaller than the outer diameter of the grip 11, at least one external thread is formed on the outer circumferential surface of the second coupling protrusion 13, in this embodiment, four inverse-tooth external threads 131 are formed on the outer circumferential surface of the second coupling protrusion 13, at least one second anti-slip ring 132 is disposed on the outer circumferential surface of the second coupling protrusion 13, and each second anti-slip ring 132 is blocked by the inverse-tooth external threads 131 to intermittently protrude around the outer circumferential surface of the second coupling protrusion 13. The extension rod 10 has a first packing ring 14 between the holding portion 11 and the first combining protrusion 12, that is, the first packing ring 14 is located on the inner end edge of the first combining protrusion 12, the outer diameter of the outer end of the first packing ring 14 is slightly larger than the outer diameter of the inner end of the first packing ring 14, and the maximum outer diameter of the first packing ring 14 is smaller than the outer diameter of the holding portion 11 and larger than the maximum outer diameter of the first combining protrusion 12. The extension rod 10 has a second packing ring 15 between the holding portion 11 and the second combining protrusion 13, that is, the second packing ring 15 is located on the inner end edge of the second combining protrusion 13, the outer diameter of the outer end of the second packing ring 15 is slightly larger than the outer diameter of the inner end of the second packing ring 15, and the maximum outer diameter of the second packing ring 15 is smaller than the outer diameter of the holding portion 11 and larger than the maximum outer diameter of the second combining protrusion 13. The holding portion 11 has a "positive" symbol on the outer peripheral surface near the first engaging protrusion 12, and the holding portion 11 has a "one" symbol on the outer peripheral surface near the second engaging protrusion 13 for identifying the rotation direction of the external thread.

Referring to fig. 4 to 6, the connector unit 20 has at least one connector 21, and the connector 21 is integrally made of a plastic material with a slight elastic deformation capability. The joint 21 has a holding portion 211 and at least one engaging recess 212 axially recessed from one end of the holding portion 211, the engaging recess 212 is tapered, and the inner diameter of the engaging recess 212 is gradually reduced from the outer end to the inner end. The inner peripheral surface of the combining concave part 212 is formed with an orthodontics and inverse-dontics thread groove 213, in this embodiment, the orthodontics and inverse-dontics thread groove 213 is composed of four orthodontics thread grooves 215 and four inverse-dontics thread grooves 214 alternately arranged, the junction of the orthodontics thread groove 215 and the inverse-dontics thread groove 214 forms a plurality of thread groove side peaks 217, and the other end or the other end of the joint 21 can be set to be the same structure or any shape or structure of different types according to the assembling requirement. The outer end of the combining concave part 212 is formed with a packing groove 216, and the inner diameter of the packing groove 216 is slightly smaller than the outer diameter of the outer end of the first packing ring 14 and the second packing ring 15 of the extension rod 10 and is equal to the outer diameter of the inner end of the first packing ring 14 and the second packing ring 15.

Therefore, the above description is a description of each component of the anti-loose building block structure 100 provided by a preferred embodiment of the present invention, and then the using characteristics thereof are described as follows:

referring to fig. 7 to 10, when the extension rod 10 is to be coupled to the joint 21 of the joint unit 20, the first coupling protrusion 12 of the extension rod 10 is moved toward the coupling recess 212 of the joint 21 and screwed in a screwing direction (as shown in fig. 7 and 8), so that the first coupling protrusion 12 is screwed into the coupling recess 212, the external orthodontic thread 121 on the first coupling protrusion 12 is screwed into the positive groove 215 of the internal orthodontic screw groove 213 of the coupling protrusion 212 (as shown in fig. 9 and 10), and when the extension rod 10 is rotated in a reverse direction, the external orthodontic thread 121 on the first coupling protrusion 12 is separated from the positive groove 215 of the internal orthodontic screw groove 213 of the coupling recess 212, so as to achieve the convenience of quick assembly and disassembly. In addition, the above description takes as an example the male orthodontic screw on the first coupling protrusion 12 of the extension bar 10 and the male screw groove 215 of the female orthodontic screw groove 213 in the coupling recess 212 of the joint 21 are screwed and separated; however, in practice, since the positive and negative thread grooves 213 of the joint 21 are formed by the positive and negative thread grooves 214 and 215, the second coupling protrusion 13 of the extension rod 10 can be similarly screwed into and separated from the negative thread groove 214 of the positive and negative thread grooves 213 of the joint 21 without recognizing the positive and negative external threads, so that the positive and negative external threads can be screwed into the same positive and negative thread groove.

In addition, the first and second anti-slip rings 122 and 132 are respectively disposed on the first and second coupling protrusions 12 and 13 of the extension bar 10. Therefore, when the orthodontic external thread 121 or the contra-dental external thread 131 is screwed with the orthodontic inverse thread groove 213, the groove edge peaks 217 formed between the alternating arrangement of the orthodontic thread groove 214 and the contra-thread groove 215 of the orthodontic inverse thread groove 213 are exactly clamped against the corresponding side edges of the first anti-slip ring 122 and the second anti-slip ring 132. As shown in fig. 9 and 10, the groove edge 217 is exactly engaged with the side edge of the first anti-slip ring 122. Therefore, when the extension rod 10 or the joint 21 is slightly touched, the thread groove edge 217 is just clamped on the side edge of the first anti-drop ring 122, so that the extension rod 10 and the joint 21 can be prevented from being mistakenly touched and reversely rotated to be separated, and further the effect of preventing the loosening is achieved. Of course, when the extension rod 10 or the joint 21 is rotated by an external force applied by a user, the spiral groove edge 217 and the first anti-slip ring 122 can pass each other, so that the extension rod 10 and the joint 21 are separated.

Although in the above embodiments, the extension bar 10 is a stub bar. However, in practice, extension bar 10 can also be a long axis extension bar 10 (as shown in FIG. 11).

In the above embodiment, as shown in fig. 12, the extension rod 10 is a short shaft extension rod, and the outer peripheral surface of the grip 11 is provided with a non-slip texture 16, so that when the extension rod is used as a wheel shaft, the friction force during rotation can be increased.

In the above embodiment, as shown in fig. 13, the extension rod 10 is a long shaft extension rod, and the outer peripheral surface of the grip 11 is provided with a non-slip texture 16, so that when the extension rod is used as a wheel shaft, the friction force during rotation can be increased.

In the above embodiment, as shown in fig. 14, one end of the extension rod 10 is a first coupling protrusion 12, and the other end thereof can be a motor connecting portion 17 for connecting with a motor (not shown).

Furthermore, although the external threads on the first coupling protrusion are orthodontic external threads and the external threads on the second coupling protrusion are contra-dental external threads in the above embodiments, the external threads on the first coupling protrusion may be contra-dental external threads and the external threads on the second coupling protrusion may be orthodontic external threads, which may achieve the same effect.

Referring to fig. fifteenth a to fifteenth k, the connector unit 20 may include various types of connectors, including one or more short coaxial double connectors 31, one or more long coaxial double connectors 32, one or more right angle double connectors 33, one or more axle tube coaxial double connectors 34, one or more axle tube right angle double connectors 35, one or more axle tube T-shaped triple connectors 36, one or more axle tube cross-shaped four connectors 37, one or more axle tube equal angle triple connectors 38, one or more right angle C-shaped single connectors 39, one or more bevel angle C-shaped single connectors 41, one or more T-shaped triple connectors 42, and the like.

The short coaxial double joint 31 is a short shaft tube body with two through ends, each end has a combining concave part 312, each combining concave part 312 has an orthodontics thread groove 313, each orthodontics thread groove 313 is composed of four orthodontics thread grooves and four inverse thread grooves alternately arranged at intervals.

The long coaxial double joint 32 is a long shaft tube with two through ends, each end has a combining concave 322, each combining concave 322 has a positive and negative screw groove 323, each positive and negative screw groove 323 is composed of four positive and four negative screw grooves alternately arranged.

The right-angle double joint 33 is formed by two pipes in right angle, each pipe has a combining concave part 332, each combining concave part 332 has an orthodontic screw groove 333, each orthodontic screw groove 333 is formed by alternately arranging four orthodontic screw grooves and four anti-screw grooves at intervals.

The coaxial double joint 34 is formed with a combination concave 342 on the opposite outer ring surface of a shaft tube 349 with a through hole 348, and each combination concave 342 has a positive and negative thread groove 343, and each positive and negative thread groove 343 is formed by alternately arranging four positive and negative thread grooves.

The auxiliary shaft tube right angle double joint 35 is formed with a combination concave 352 at a right angle on an outer ring surface of a shaft tube 359 with a through hole 358, each combination concave 352 is provided with a positive and negative thread groove 353, each positive and negative thread groove 353 is formed by alternately arranging four positive thread grooves and four negative thread grooves at intervals.

The shaft-attached tube T-shaped three-joint 36 forms three combining recesses 362 on an outer circumferential surface of a shaft tube 369 having a through hole 368, each combining recess 362 has a positive and negative thread groove 363 therein, and each positive and negative thread groove 363 is formed by alternately arranging four positive thread grooves and four negative thread grooves at intervals.

The axle-attached tube cross four-joint 37 forms four engaging recesses 372 on an outer circumferential surface of an axle tube 379 having a through hole 378, the engaging recesses 372 are arranged at right angles to each other, each engaging recess 372 has a positive and negative thread groove 373 therein, and each positive and negative thread groove 373 is formed by alternately arranging four positive and four negative thread grooves at intervals.

The shaft-attached tube equiangular three-joint 38 forms three combining concave parts 382 on the outer annular surface of a shaft tube 389 with a through hole 388, the combining concave parts 382 are arranged at equal angles, each combining concave part 382 is internally provided with an orthodontics thread groove 383, and each orthodontics thread groove 383 is formed by alternately arranging four orthodontics thread grooves and four inverse thread grooves at intervals.

The right angle C-clamp single joint 39 is formed with a combination concave 392 on the side of a C-clamp 398, each combination concave 392 has a positive and negative thread groove 393 therein, each positive and negative thread groove 393 is composed of four positive and four negative thread grooves alternately arranged at intervals, the C-clamp 398 is arranged perpendicular to the combination concave 392.

The oblique C-clip single joint 41 forms a combining concave part 412 on the side surface of a C-clip 418, each combining concave part 412 is provided with an orthodontics thread groove 413, each orthodontics thread groove 413 is composed of four orthodontics thread grooves and four inverse thread grooves which are alternately arranged at intervals, and the C-clip 418 and the combining concave part 412 are obliquely arranged.

The outer side surface of the T-shaped three-joint 42 forms three coupling recesses 422, each coupling recess 422 has a positive and negative thread groove 423 therein, and each positive and negative thread groove 423 is formed by alternately arranging four positive thread grooves and four negative thread grooves at intervals.

In the above-mentioned various types of joints and connecting rods, the sizes of the combining concave part and the first and second combining convex parts are correspondingly complementary, and the joint and connecting rods can be assembled into various works (as shown in fig. 16 and 17), so that the invention can be combined more variously to achieve the effect of improving the creation force of infants.

The above disclosure is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the scope of the present invention, and all equivalent variations of the present invention that are obvious to those skilled in the art are also included in the present invention.