TWM589740U - Improved expansion bolt structure - Google Patents

Abstract

This creation provides an improved expansion screw structure, including: an expansion screw body, the expansion screw body includes: a deformable shaft, one end of the shaft is set as the first end, the other end is set as the second end, the shaft The first end has a limit portion extending with an outer diameter greater than that of the shaft. A communication through-hole is provided in the first end to the second end. The through-hole is located at the first end as a lock-in A hole is formed at the second end of the through hole as a locking out hole, a plurality of convex squeezing portions are provided inside the through hole, and the shaft is provided with a plurality of long grooves and forming a plurality of deformation bars, the shaft Two symmetrical notches are provided at the junction with the limiting part. Each of the two notches is connected to the locking hole in the direction of an elastically movable fixing member. A fixing protrusion is provided on the outer surface of the two fixing members; , It is easy to install in a hole, and the lock is more stable.

Description

Expansion screw structure improvement

This creation is about a screw, especially an expansion screw structure that is easy to install in a drill hole and has two fixing methods.

Press, currently to hang the object on the wall surface, most of them will first drill the hole on the wall surface, then insert the expansion screw into a screw, and expand and deform by the expansion screw to achieve the latch and locate on the wall The effect in the hole.

Expansion screws are introduced on the market, such as the new patent of "Expansion Screw and Its Application Frame" of Chinese Patent Announcement No. M392265. Two expansion ribs are extended on the expansion screw, and the expansion screw is installed in a borehole, and A screw is screwed into the expansion screw, and the expansion screw is fixed by the two convex ribs against the inner edge of the drill hole to force the deformation, however, the outer diameter of the convex rib of the expansion screw must be greater than the inner diameter of the drill hole. The convex ribs are pressed against the inner edge of the drill hole to fix the forced deformation. Therefore, it is difficult to install the expansion screw in the drill hole.

In addition, the above-mentioned expansion screw fixing method is only a method of fixing the two convex ribs against the inner edge of the borehole forcibly deforming, which makes the fixing effect unstable and easy to fall off.

In view of the fact that the expansion screw has an outer diameter of the convex rib of the expansion screw that must be greater than the inner diameter of the drill hole, the convex ribs can be forced to deform against the inner edge of the drill hole and be fixed. Therefore, when the expansion screw is reinstalled The shortcomings such as difficulty in installation in the borehole were based on the idea of thinking and creation. After many discussions and trial sample tests, as well as many revisions and improvements, this creation was launched.

This creation provides an improved expansion screw structure. The expansion screw body is used with a screw. The expansion screw body is made of plastic. The expansion screw body includes: a deformable shaft with one end of the shaft set as the first The other end is set as the second end. A limiting portion extending from the first end of the shaft with an outer diameter larger than the shaft is provided. A communicating through hole is provided from the first end to the second end , The through hole at the first end is set as a lock-in hole, the through hole at the second end is set as a lock-out hole, the inner diameter of the lock-out hole is smaller than the outer diameter of the screw, and a plurality of A convex squeezing part, and the shaft is provided with a plurality of long grooves extending from close to the first end to close to the second end, so that a plurality of deformation bars are formed between the long grooves, and the squeezing parts are located in the deformations On the bar, the outer surface of the at least one deformed bar is provided with a plurality of inverted tooth hooks, and at least two gaps are provided at the junction of the shaft and the limit portion, and each of the two gaps is connected to the lock hole in the direction of an elastic activity A fixing protrusion on the outer surface of the two fixing members, the pressing portion is tied inside the two fixing members, the fixing protrusion is provided with an inclined surface facing the second end, and between the two gaps Each has multiple reinforcing ribs.

The main purpose of the expansion screw structure improvement in this creation is that when the expansion screw body enters a round hole, the two fixing members will be elastically compressed by the round hole, and the two fixing members and the fixing protrusions will produce a reaction elastic card on the round hole The fixing rib is also stuck in the round hole, but the fixing member and the reinforcing rib will be squeezed and deformed. At this time, when the screw is locked into the through hole, the screw will push the fixing member again The squeezing part on the inner side makes the fixing member cut and fixed on the round hole with a firmer force, and is used more firmly.

Please refer to the first picture, the second picture, the third picture, and the fourth picture. This creation provides an improved expansion screw structure, which includes: an expansion screw body 10, which is used with a screw 20.

The expansion screw body 10 is made of plastic integrally formed. The expansion screw body 10 includes: a deformable shaft 11, one end of the shaft 11 is set as the first end 111, and the other end is set as the second end 112. The first end 111 of the body 11 is extended with a limiting portion 12 having an outer diameter greater than that of the shaft 11. A communication through hole 13 is provided in the first end 111 to the second end 112, and the through hole 13 A lock-in hole 131 is located at the first end 111, and a through-out hole 132 is located at the second end 112. The inner diameter of the lock-out hole 132 is smaller than the outer diameter of the screw 20. The through-hole 13 A plurality of convex squeezing portions 14 are provided inside, and the shaft 11 is provided with a plurality of long grooves 16 extending from close to the first end 111 toward the second end 112, so that a plurality of deformation bars are formed between the long grooves 16 17, and the squeezing portion 14 is located on the deformed bars, the outer surface of the at least one deformed bar is provided with a plurality of inverted tooth hooks 15, and the long groove 16 extends in a continuous tooth shape, so that each of the deformed bars 17 The position width varies differently. At the junction of the shaft 11 and the limiting portion 12, at least two symmetrical notches 18 are provided. Each of the two notches 18 is connected to the locking hole 131 in the direction of an elastically movable fixing member. 19, a fixing protrusion 191 is provided on the outer surface of the two fixing members 19, and the pressing portion 14 is tied inside the two fixing members 19, the fixing protrusion 191 is provided with an inclined surface 192 facing the second end 112, and A plurality of reinforcing ribs 113 are provided between the two gaps 17.

The screw 20 has a screw 21 with a screw head 22 at one end and a pointed tail 23 at the other end. The screw 21 is provided with a helical thread 24 on the pointed tail 23. The screw 20 is locked by the screw 21 The through hole 13 of the expansion screw body 10.

Its use has two states, one is applied to the hollow gypsum board 30, as shown in the fourth, fifth, sixth, seventh and eighth figures, and the other is applied to the solid wall 40, as Figure 9 and Figure 10 show.

First, as shown in the fourth, fifth, sixth, seventh and eighth figures, the hollow gypsum board 30 is drilled with a round hole 31, and the shaft 11 of the expansion screw body 10 is aligned with the The round hole 31 is knocked in, so that the limiting portion 12 is restricted outside the resisting round hole 31, and at the same time, the two fixing members 19 are elastically compressed by the round hole 31, and the two fixing members 19 are combined with the fixing protrusion 191 The round hole 31 generates a reaction elastic clamping force, and at the same time, the inclined surface 192 allows the fixing member 19 to smoothly enter the round hole 31, the reinforcing rib 113 also snaps into the round hole 31, the pointed tail of the screw 20 23 penetrates through the locking hole 131, rotates the screw 20 to make the screw 24 tap the pressing portion 14, the screw 20 is further locked so that the screw head 22 is resisted by the limiting portion 12, and The pointed tail portion 23 passes through the lock-out hole 132, and when the lock-in hole 131 continues to be displaced along the screw 21 toward the lock-in hole 131, the deformation bars 17 expand and expand due to compression (see (Figure 7), and continue to lock the deformation bars 17 will cause twisting deformation due to different changes in width, and then twisting, and finally will form a sphere-like twist inside the circular hole 31 to achieve The expansion screw body 10 is fixed in the round hole 31.

From the perspective of the ninth and tenth figures, the solid wall 40 is drilled with a round hole 41, and the shaft 11 of the expansion screw body 10 is knocked into the round hole 31 to restrict the limiting portion 12 Outside the resisting round hole 41, at the same time, the two fixing members 19 are elastically compressed by the round hole 41, and the two fixing members 19 and the fixing protrusions 191 generate an elastic elastic clamping force on the round hole 41, At the same time, the inclined surface 192 allows the fixing member 19 to smoothly enter the round hole 41, the reinforcing rib 113 also snaps into the round hole 41, the pointed tail portion 23 of the screw 20 penetrates through the locking hole 131, and rotates the screw 20. The screw 24 taps the pressing portion 14. The screw 20 is further locked so that the screw head 22 is resisted by the limiting portion 12, and the pointed tail portion 23 passes through the locking hole 132. The locking hole 131 continues to be displaced along the screw 21 toward the locking hole 131, so that each deformable bar 17 expands and expands due to compression (see the tenth figure), and the deformable bar 17 The inverted barb 15 of the tooth also produces a hole in the round hole 41, so that the expansion screw body 10 is fixed in the round hole 41.

According to the structure of the above specific embodiment, the following benefits can be obtained: when the expansion screw body 10 enters the circular hole 31, the two fixing members 19 are elastically compressed by the circular hole 31, and the two fixing members 19 are The block 191 exerts a reverse elastic clamping force on the round hole 31, and the reinforcing rib 113 also snaps into the round hole 31, but both the fixing member 19 and the reinforcing rib 113 will be crushed and deformed. When the screw 20 is locked into the through hole 13, the screw 20 will push the pressing portion 14 inside the fixing member 19 again, so that the fixing member 19 is fixed to the round hole 31 with a firmer force, and the firm.

10‧‧‧Expansion screw body

11‧‧‧Shaft

111‧‧‧The first end

112‧‧‧The second end

113‧‧‧reinforcing ribs

12‧‧‧Limiting Department

13‧‧‧Through hole

131‧‧‧locking hole

132‧‧‧lock out hole

14‧‧‧Extrusion Department

15‧‧‧Inverted tooth hook

16‧‧‧Long slot

17‧‧‧deformation bar

18‧‧‧Notch

19‧‧‧Fixed parts

191‧‧‧Fixed bump

192‧‧‧inclined surface

20‧‧‧screw

21‧‧‧screw

22‧‧‧Screw head

23‧‧‧Sharp tail

24‧‧‧screw

30‧‧‧Hollow gypsum board

31‧‧‧round hole

40‧‧‧Solid wall

41‧‧‧round hole

The first picture is a perspective view of the main body of the expansion screw. The second picture is the front view of the main body of the expansion screw. The third picture is the exploded view of the main body and screw of the expansion screw. The fourth picture is the action picture 1 of the creation of the expansion screw body locked on the hollow gypsum board. The fifth picture is the action picture 2 of the creation of the expansion screw body locked on the hollow gypsum board. The sixth picture is the action picture 3 of the creation of the expansion screw body locked on the hollow gypsum board. The seventh picture is the action picture 4 of the creation of the expansion screw body locked on the hollow gypsum board. The eighth picture is the completion diagram of the action of the expansion screw body locked on the hollow gypsum board. The ninth picture is the action picture of the creation of the expansion screw body locked on the solid wall. The tenth picture is the completed picture of the expansion screw body lock created on the solid wall.

10‧‧‧Expansion screw body

11‧‧‧Shaft

111‧‧‧The first end

112‧‧‧The second end

113‧‧‧reinforcing ribs

12‧‧‧Limiting Department

13‧‧‧Through hole

131‧‧‧locking hole

14‧‧‧Extrusion Department

15‧‧‧Inverted tooth hook

16‧‧‧Long slot

17‧‧‧deformation bar

18‧‧‧Notch

19‧‧‧Fixed parts

191‧‧‧Fixed bump

192‧‧‧inclined surface

Claims (6)

An improved expansion screw structure includes: an expansion screw body, which is used in conjunction with a screw; The expansion screw body is made of plastic and includes: a deformable shaft, one end of the shaft is set as a first end, the other end is set as a second end, and an outer diameter extends from the first end of the shaft A through hole is provided inside the first end to the second end larger than the limit portion of the shaft, the through hole at the first end is set as a locking hole, and the through hole is at the second end It is set as a lock out hole, the inner diameter of the lock out hole is smaller than the outer diameter of the screw, the inside of the through hole is provided with a plurality of convex extrusion parts, and the shaft is provided with a plurality of long slots from close to the first end Extending close to the second end to form a plurality of deformation bars between the long grooves, and the squeezing portion is located on the deformation bars, at least two gaps are provided at the junction of the shaft and the limiting portion, the at least two gaps An elastic movable fixing member is connected to the inner close to the lock-in hole, and a fixing protrusion is provided on the outer surface of the two fixing members, and the pressing part is tied inside the fixing member. The expansion screw structure is improved as described in item 1 of the patent application range, in which the long groove is a continuous tooth-shaped extension of the extension, so that the width of each position of the deformed bar changes differently. The expansion screw structure is improved as described in item 1 of the patent application scope, wherein the fixing protrusion is provided with an inclined surface facing the second end. The expansion screw structure is improved as described in item 1 of the patent application scope, wherein a plurality of reinforcing ribs are provided between the two notches. The structure of the expansion screw as described in item 1 of the patent application scope is improved, in which the screw is inserted through the through hole lock. The structure of the expansion screw as described in item 1 of the patent application scope, wherein the outer surface of the at least one deformed bar is provided with a plurality of inverted tooth hooks.

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