CN203934223U - Telescopic screw and main board combined structure - Google Patents

Abstract

A retractable screw assembly and a main board assembly structure. This telescopic screw member includes: connecting column, handle and screw; the connecting column comprises a main body and a screw hole, and the screw hole penetrates through the main body; the handle comprises a holding end, an inner groove and a through hole, wherein the inner groove is concavely arranged at the holding end, the cross section of the inner groove is non-circular and comprises a bottom wall and a peripheral side wall, the through hole is positioned on the bottom wall, and a limiting part is formed between the through hole and the peripheral side wall; the screw includes the body of rod, external screw thread portion and spiral shell head, and external screw thread portion is located the one end of the body of rod, and the spiral shell head then is located the other end of the body of rod, and the cross-section of spiral shell head corresponds the shape of inner groovy, and wherein external screw thread portion passes inner groovy, through-hole and spiral shell according to the preface and fits the spiro union hole, makes the spacing portion telescopically of handle lean on in the spliced pole and be in the primary importance, perhaps supports and lean on in spiral shell head and be in the second place. The utility model can be completed without any hand tool in the process of combining the main board and the bearing plate or disassembling.

Description

Combination structure of telescopic screw parts and main board

technical field

The utility model relates to a combination structure of a telescopic screw fitting and a main board, in particular to a combination structure of a telescopic screw fitting and a main board using the telescopic screw fitting.

Background technique

General server mainframes (or servers) are usually equipped with a motherboard. However, since the surface of the motherboard has a lot of electronic components, it is easy to damage it due to touching. Personnel can hold the handle when installing or dismounting the main board, so as to avoid damage to the main board caused by direct contact of hands with electronic parts.

However, since the server mainframe has a certain internal space, many electronic components (such as PCIe cards and RAID cards, etc.) must be installed on the main board and covered by the handle, so the height of the handle will be limited (usually below 11mm) ). The average person's fingertips are about 15-20mm in size, so visible, it is easy to cause difficulty in grasping, and on the contrary, it is easy to fall when moving the motherboard.

In addition, although some operators use additional screws assembled on the motherboard to loosen the screws to adjust the height of the screw heads so that hands can easily grasp them, but this method requires the use of hand tools every time the motherboard is installed or removed, resulting in It is inconvenient to assemble and reduces work efficiency.

Therefore, it is necessary to provide a combination structure of the telescopic screw and the main board to solve the above problems.

Utility model content

In view of the above problems, the utility model provides a composite structure of a main board, including a main board, a bearing plate and telescopic screw parts. Wherein the main board includes a first side, a second side and a perforation, and the perforation runs through the first side and the second side. The supporting plate is located on the second side of the main board. The supporting plate includes a positioning column and extends toward the through hole, wherein the positioning column includes an inner screw hole. In one embodiment, the positioning column can be against the second side, and the inner screw hole can be On the perforation.

The telescopic screw fitting is connected to the main board and the bearing plate, and includes a connecting column, a handle and screws. The connecting column includes a main body and a screw hole, the main body is connected to the main board, and the screw hole is penetrated through the main body and communicates with the through hole of the main board. The handle includes a grip end, an inner groove and a through hole. The inner groove is recessed at the grip end, wherein the cross section of the inner groove is non-circular and includes a bottom wall and a peripheral side wall. The through hole is located at the bottom wall. And a limited portion is formed between the through hole and the peripheral side wall. The screw includes a rod body, an external threaded part and a screw head. The external threaded part is located at one end of the rod body, and the screw head is located at the other end of the rod body, and the section of the screw head corresponds to the shape of the inner groove. Go through the inner groove, the through hole and the threaded hole and be screwed and positioned in the inner screw hole, so that the limit part of the handle can be telescopically abutted against the connecting column to be in the first position, or abutted against the screw head to be in the first position. second position.

Wherein, the cross-sectional contours of the inner groove and the screw head can be polygonal, elliptical or have a protruding part, and this part is not limited.

With the above structure, the telescopic screw fitting can be completed without using any hand tools during the process of assembling or disassembling the main board and the supporting board. In addition, when grabbing the motherboard, the handle can be adjusted to the second position by telescopic adjustment, so as to increase the distance between the handle and the motherboard, which is convenient for the user to hold and grab by hand, while assembling electronic components (such as PCIe cards and RAID card, etc.) on the main board, the handle can be telescopically adjusted to the first position to reduce the distance between the handle and the main board, so that the electronic components can be smoothly installed on the main board in the limited casing space.

In addition, the utility model also provides a telescopic screw joint, which includes: a connecting column, a handle and a screw; the connecting column includes a main body and a screw hole, and the screw hole penetrates On the main body; the handle includes a grip end, an inner groove and a through hole, the inner groove is recessed at the grip end, wherein the inner groove has a non-circular section and includes a bottom wall and a circumference The side wall, the through hole is located on the bottom wall, and a limiting part is formed between the through hole and the surrounding side wall; the screw includes a rod body, an external thread part and a screw head, and the external thread part is located on the side wall. One end of the rod body, the screw head is located at the other end of the rod body, and the section of the screw head corresponds to the shape of the inner groove, wherein the external thread part passes through the inner groove, the through hole and the screw in sequence. Fitting into the threaded hole, the limiting portion of the handle can telescopically abut against the connecting post to be in a first position, or abut against the screw head to be in a second position.

The utility model also provides a combination structure of the main board, which includes: a main board, the main board includes a first side, a second side and a perforation, wherein the perforation runs through the first side and the second side ; a bearing plate, the bearing plate is located on the second side, the bearing plate includes a positioning column and extends toward the through hole, wherein the positioning column includes an internal screw hole; and a telescopic screw, the telescopic screw The parts include: a connecting column, the connecting column includes a main body and a threaded hole, the threaded hole penetrates the main body; a handle, the handle includes a grip end, an inner groove and a through hole, the inner concave A groove is recessed on the gripping end, wherein the inner groove has a non-circular section and includes a bottom wall and a peripheral side wall, the through hole is located on the bottom wall, and a hole is formed between the through hole and the peripheral side wall. There is a limiting part; and a screw, the screw includes a rod body, an external thread part and a screw head, the external thread part is located at one end of the rod body, the screw head is located at the other end of the rod body, and the screw The cross-section of the head corresponds to the shape of the inner groove, wherein the external thread part passes through the inner groove, the through hole and is screwed into the threaded hole, so that the limit part of the handle can telescopically resist a first position against the connecting post, or a second position against the screw head, wherein the main body of the connecting post is connected to the main board, the screw hole communicates with the through hole, and The external thread part also passes through the threaded hole and is screwed and positioned in the internal threaded hole.

The utility model also provides a combination structure of the main board, which includes: a main board, the main board includes a first side, a second side and a perforation, wherein the perforation runs through the first side and the second side ; a bearing plate, the bearing plate is located on the second side, the bearing plate includes a positioning column and extends toward the through hole, wherein the positioning column includes an internal screw hole; and a telescopic screw, the telescopic screw The parts include: a connecting column, the connecting column includes a main body and a threaded hole, the threaded hole penetrates the main body; a handle, the handle includes a grip end, an inner groove and a through hole, the inner concave A groove is recessed on the gripping end, wherein the inner groove has a non-circular section and includes a bottom wall and a peripheral side wall, the through hole is located on the bottom wall, and a hole is formed between the through hole and the peripheral side wall. There is a limiting part; and a screw, the screw includes a rod body, an external thread part and a screw head, the external thread part is located at one end of the rod body, the screw head is located at the other end of the rod body, and the screw The cross-section of the head corresponds to the shape of the inner groove, wherein the external thread part passes through the inner groove, the through hole and is screwed into the threaded hole, so that the limit part of the handle can telescopically resist Leaning against the connecting post to be in a first position, or abutting against the screw head to be in a second position; wherein the connecting post further includes a slot, the slot communicates with the threaded hole, and the The slot hole is far away from the screw head relative to the screw hole, wherein the main body of the connecting column is connected to the main board, the screw hole communicates with the through hole, and the external thread part also passes through the screw hole and is screwed together Locate the internal threaded hole.

The utility model also provides a combination structure of the main board, which includes: a main board, the main board includes a first side, a second side and a perforation, wherein the perforation runs through the first side and the second side ; a bearing plate, the bearing plate is located on the second side, the bearing plate includes a positioning column and extends toward the through hole, wherein the positioning column includes an internal screw hole; and a telescopic screw, the telescopic screw The parts include: a connecting column, the connecting column includes a main body and a threaded hole, the threaded hole penetrates the main body; a handle, the handle includes a grip end, an inner groove and a through hole, the inner concave A groove is recessed on the gripping end, wherein the inner groove has a non-circular section and includes a bottom wall and a peripheral side wall, the through hole is located on the bottom wall, and a hole is formed between the through hole and the peripheral side wall. There is a limiting part; and a screw, the screw includes a rod body, an external thread part and a screw head, the external thread part is located at one end of the rod body, the screw head is located at the other end of the rod body, and the screw The cross-section of the head corresponds to the shape of the inner groove, wherein the external thread part passes through the inner groove, the through hole and is screwed into the threaded hole, so that the limit part of the handle can telescopically resist Leaning against the connecting post to be in a first position, or abutting against the screw head to be in a second position; wherein the connecting post further includes a slot, the slot communicates with the threaded hole, and the The slotted hole is far away from the screw head relative to the threaded hole; wherein the width of the slotted hole is greater than the width of the screwed hole, and the height distance of the slotted hole is greater than the length of the external threaded part, wherein the main body of the connecting column is connected On the main board, the threaded hole communicates with the through hole, and the external thread part also passes through the threaded hole and is screwed and positioned in the internal threaded hole.

The utility model also provides a combination structure of the main board, which includes: a main board, the main board includes a first side, a second side and a perforation, wherein the perforation runs through the first side and the second side ; a bearing plate, the bearing plate is located on the second side, the bearing plate includes a positioning column and extends toward the through hole, wherein the positioning column includes an internal screw hole; and a telescopic screw, the telescopic screw The parts include: a connecting column, the connecting column includes a main body and a threaded hole, the threaded hole penetrates the main body; a handle, the handle includes a grip end, an inner groove and a through hole, the inner concave A groove is recessed on the gripping end, wherein the inner groove has a non-circular section and includes a bottom wall and a peripheral side wall, the through hole is located on the bottom wall, and a hole is formed between the through hole and the peripheral side wall. There is a limiting part; and a screw, the screw includes a rod body, an external thread part and a screw head, the external thread part is located at one end of the rod body, the screw head is located at the other end of the rod body, and the screw The cross-section of the head corresponds to the shape of the inner groove, wherein the external thread part passes through the inner groove, the through hole and is screwed into the threaded hole, so that the limit part of the handle can telescopically resist Leaning against the connecting column to be in a first position, or abutting against the screw head to be in a second position; wherein when the external threaded portion is screwed through the screw hole, the screw head is located in the concave In the groove, wherein the main body of the connecting column is connected to the main board, the threaded hole communicates with the through hole, and the external thread part also passes through the threaded hole and is screwed and positioned in the internal threaded hole.

The utility model also provides a combination structure of the main board, which includes: a main board, the main board includes a first side, a second side and a perforation, wherein the perforation runs through the first side and the second side ; a bearing plate, the bearing plate is located on the second side, the bearing plate includes a positioning column and extends toward the through hole, wherein the positioning column includes an internal screw hole; and a telescopic screw, the telescopic screw The parts include: a connecting column, the connecting column includes a main body and a threaded hole, the threaded hole penetrates the main body; a handle, the handle includes a grip end, an inner groove and a through hole, the inner concave A groove is recessed on the gripping end, wherein the inner groove has a non-circular section and includes a bottom wall and a peripheral side wall, the through hole is located on the bottom wall, and a hole is formed between the through hole and the peripheral side wall. There is a limiting part; and a screw, the screw includes a rod body, an external thread part and a screw head, the external thread part is located at one end of the rod body, the screw head is located at the other end of the rod body, and the screw The cross-section of the head corresponds to the shape of the inner groove, wherein the external thread part passes through the inner groove, the through hole and is screwed into the threaded hole, so that the limit part of the handle can telescopically resist Leaning against the connecting column to be in a first position, or leaning against the screw head to be in a second position; wherein the gripping end includes a flared head, wherein a non-slip portion is provided on the peripheral side of the flared head , wherein the main body of the connecting column is connected to the main board, the threaded hole communicates with the through hole, and the external thread part also passes through the threaded hole and is screwed and positioned in the internal threaded hole.

The utility model can be completed without using any hand tools in the process of assembling the main board and the supporting board or disassembling.

The detailed features and advantages of the present utility model are described in detail below in the embodiment, and its content is enough to make any person skilled in the art understand the technical content of the present utility model and implement accordingly, and according to the content disclosed in this specification, the claims With the scope and accompanying drawings, anyone skilled in the art can easily understand the related objects and advantages of the present utility model.

Description of drawings

Fig. 1 is a schematic diagram (1) of the combined structure of the main board of the present invention.

Fig. 2 is a schematic diagram (2) of the combined structure of the main board of the present invention.

Fig. 3 is an exploded perspective view of the composite structure of the main board of the present invention.

Fig. 4 is a partially enlarged and exploded perspective view of the combined structure of the main board of the present invention.

Fig. 5 is an action diagram (1) of the composite structure of the main board of the present invention.

Fig. 6 is an action diagram (2) of the composite structure of the main board of the present invention.

Fig. 7 is the action diagram (3) of the composite structure of the main board of the present invention.

Fig. 8 is an action diagram (four) of the composite structure of the main board of the present invention.

Fig. 9 is a diagram of the second embodiment of the screw head and the inner groove of the utility model.

Fig. 10 is a diagram of the third embodiment of the screw head and the inner groove of the utility model.

Fig. 11 is a diagram of the fourth embodiment of the screw head of the utility model.

Fig. 12 is a diagram of the fifth embodiment of the screw head of the present invention.

Fig. 13 is a diagram of the sixth embodiment of the screw head of the present invention.

Fig. 14 is a diagram of the seventh embodiment of the screw head of the utility model.

Description of main component symbols:

1 Telescoping screw 26 Connection end

10 Connecting post 27 Ring boss

11 Body 30 Screws

12 Threaded hole 31 Rod body

13 Slotted hole 32 External thread

14 Abutment 33 Screw head

20 Handle 34 Locating protrusion

21 Grip end 4 Motherboard combined structure

22 inner groove 40 main board

221 bottom wall 41 first side

222 Peripheral side wall 42 Second side

223 Limiting part 43 Perforation

23 through hole 50 carrier plate

24 Expanding head 51 Positioning column

25 Anti-slip part 52 Internal screw hole

Detailed ways

Please refer to FIG. 1 to FIG. 3 , the utility model provides a mainboard combination structure 4 , including a mainboard 40 , a bearing plate 50 and a telescopic screw fitting 1 . Wherein the motherboard assembly structure 4 can be located inside the server or the server host, but is not limited thereto, and can also be arranged inside other electronic devices (such as computer hosts, audio-visual players, etc.).

Referring to Fig. 4, Fig. 5, and Fig. 7, the main board 40 includes a first side 41, a second side 42 and a through hole 43. In this embodiment, the main board 40 is an L-shaped board, and the first side 41 and the second side 42 are opposite surfaces of the L-shaped plate, and the perforation 43 penetrates the first side 41 and the second side 42 in a direction perpendicular to the first side 41 and the second side 42 . The above-mentioned shape of the main board 40 is for illustration only, and is not limited thereto, and may also be rectangular or other polygonal shapes.

The supporting plate 50 is arranged on the second side 42 of the main board 40. The supporting plate 50 includes a positioning column 51 and extends toward the through hole 43. In this embodiment, the positioning column 51 is a cylinder and is perforated with a concentrically arranged inner screw hole 52. . Wherein the supporting plate 50 can be arranged on the second side 42 of the main board 40 at intervals, and the diameter width of the positioning post 51 is smaller than the perforation 43, but it is not limited to this, and the main board 40 can also be against the positioning post 51, and the inner screw hole 52 For the arrangement of the perforation 43 .

The telescopic screw fitting 1 is connected to the main board 40 and the supporting board 50 , and includes a connecting post 10 , a handle 20 and a screw 30 . The connecting post 10 includes a main body 11 and a threaded hole 12 . In this embodiment, the main body 11 is a cylinder and connected to the main board 40 , and the threaded hole 12 penetrates the main body 11 and communicates with the through hole 43 . Wherein the connecting column 10 may also include an abutment portion 14, which is annularly protruded on the peripheral side of the main body 11. In this embodiment, the main body 11 is inserted into the through hole 43, and the abutment portion 14 abuts against the first side of the main board 40. One side 41 enables the connecting column 10 and the main board 40 to be combined and positioned. In this embodiment, the bottom end of the connecting post 10 also abuts against the positioning post 51 , and the threaded hole 12 is located in the inner threaded hole 52 . Alternatively, the main board 40 can also lean against the positioning post 51 , the bottom end of the connecting post 10 and the positioning post 51 are spaced apart from each other, and the threaded hole 12 is located in the inner screw hole 52 , this part is not limited. In another embodiment, the main body 11 of the connecting post 10 may also be directly fixed on the main board 40 (eg by welding or bonding).

The above-mentioned handle 20 includes a grip end 21, an inner groove 22 and a through hole 23. The inner groove 22 is recessed at the grip end 21, wherein the cross section of the inner groove 22 is non-circular and includes a bottom wall 221 and a surrounding The side wall 222 and the through hole 23 pass through the bottom wall 221 , and form a limiting portion 223 between the through hole 23 and the peripheral side wall 222 . The handle end 21 can include a flared head 24, wherein the peripheral side of the flared head 24 is provided with an anti-slip portion 25, as shown in Figure 4 and Figure 5 in detail, the handle 20 can be a cylinder, and the grip of the handle 20 The end 21 has a disc body (i.e. the enlarged head 24) with an enlarged diameter, so as to facilitate the user to hold and grasp. Not limited thereto, the anti-slip part 25 can also be anti-slip glue or a plastic pad attached to the peripheral side of the expansion head 24, so that the assembler can hold it more stably and prevent slipping.

Above-mentioned screw 30 comprises rod body 31, external thread portion 32 and screw head 33, and external thread portion 32 is connected to one end of rod body 31, and screw head 33 is then connected to the other end of rod body 31, and the section of screw head 33 corresponds to inner According to the shape of the groove 22 , the external thread portion 32 sequentially passes through the internal groove 22 , the through hole 23 and the threaded hole 12 and is screwed and positioned in the internal threaded hole 52 . In this embodiment, the rod body 31 can be a cylinder with a diameter smaller than that of the through hole 43 so as to pass through the through hole 43 smoothly.

As shown in FIG. 4 again, the cross-sectional contours of the screw head 33 and the inner groove 22 may be triangular. Alternatively, the cross-sectional profile of the screw head 33 and the inner groove 22 can include at least a straight line section, as shown in Figure 9, the cross-sectional profile of the screw head 33 and the inner groove 22 can be formed by a straight line section and an arc Or, as shown in Figure 10, the cross-sectional profile of the screw head 33 and the inner groove 22 can also be in the form of a cross, or as shown in Figures 11 to 13, the screw head 33 and the inner groove 22 The cross-sectional profile of the groove 22 is polygonal (such as trapezoidal, hexagonal or rhombus, etc.). Also as shown in FIG. 14 , the cross-sectional contours of the screw head 33 and the inner groove 22 are in the form of ovals. Alternatively, the cross-sectional profiles of the screw head 33 and the inner groove 22 may include a protruding portion. Since there are many non-circular forms, no examples are given here to describe them one by one. These simple shape changes should all be within the scope of the scope of the technical features of the present utility model, which is hereby declared.

Referring again to Fig. 1 and shown in Fig. 2, wherein the main board assembly structure 4 can include two telescopic screw parts 1, and the connecting line of the two telescopic screw parts 1 passes through the center of gravity position of the main board 40 for the operator The handle 20 can be grasped by both hands at the same time, so that the process of moving the main board 40 is more stable and smooth. Alternatively, the main board assembly structure 4 may also only include one telescopic screw element 1 , for example, may be located at the center of gravity of the main board 40 , but this part is not limited thereto.

By above-mentioned structure, with regard to the combination process of the present utility model, cooperate accompanying drawing to illustrate as follows:

Please refer to FIG. 5 . First, the assembler can fix the connecting column 10 to the main board 40 so that the screw hole 12 and the through hole 43 communicate with each other, and then pass the external thread portion 32 of the screw 30 through the inner groove of the handle 20 22 and the through hole 23, then as shown in Figure 6, the external threaded part 32 passes through the screwed hole 12 and abuts against the internal screw hole 52 by rotating the screw head 33, so that the upward freedom of the handle 20 is restricted. And now the screw head 33 is located in the inner groove 22, because the screw head 33 and the inner groove 22 are in a corresponding non-circular form, so the handle 20 can be turned to drive the screw head 33 to rotate, so that the outer threaded portion 32 is locked in the inner screw hole 52 of the bearing plate 50, thereby, as shown in FIG. It can telescopically abut against the connecting column 10 in the first position, or, as shown in FIG. 8 , abut against the screw head 33 in the second position. Thereby, the process of assembling or disassembling the main board 40 and the supporting board 50 of the telescopic screw 1 can be completed without using any hand tools, thereby greatly improving the working efficiency. In addition, when the assembler wants to grasp the main board 40, the handle 20 can be telescopically adjusted to the second position (as shown in FIG. 8 ), so as to increase the distance between the handle 20 and the main board 40, which is convenient for the user to hold and grasp. Take, and when the electronic components (such as PCIe cards and RAID cards, etc., can be referred to as shown in Figure 1) are assembled on the motherboard 40, the handle 20 can be telescopically adjusted to the first position (as shown in Figure 7) to lower the The distance between the handle 20 and the main board 40 enables the electronic components to be smoothly installed on the main board 40 in a limited case space.

In addition, as shown in FIG. 7 , in this embodiment, the connecting column 10 may include a slot 13 , the slot 13 communicates with the screw hole 12 , and the slot 13 is away from the screw head 33 relative to the screw hole 12 . Wherein the width of the slotted hole 13 is greater than the width of the screwed hole 12, so that the external threaded part 32 can pass through the screwed hole 12 and then smoothly pass through the slotted hole 13 to be screwed and positioned at the inner screwed hole 52. In addition, the slotted hole 13 The height distance can be greater than the length of the external threaded part 32 , so that the external threaded part 32 can have a space to move up and down after passing through the screw hole 12 , so that the screw head 33 can be inserted into the inner groove 22 more smoothly.

As shown in Figure 7 again, wherein the handle 20 also includes a connection end 26 relative to the grip end 21, the connection end 26 can be provided with a ring protrusion 27, and when the handle 20 is in the first position, the ring protrusion 27 is correspondingly against The abutting portion 14 makes the abutting state of the handle 20 and the connecting post 10 more stable.

The above-mentioned screw 30 can also include a positioning protrusion 34, which is connected to the rod body 31 and is located between the external thread portion 32 and the screw head 33, and the positioning protrusion 34 is abutted against the connecting column 10, whereby, in addition to preventing the screw 30 from Continue to screw through the inner screw hole 52 , and the connecting post 10 can be fixed to the main board 40 .

To sum up, the telescopic screw fitting of the present invention can be completed without using any hand tools during the process of assembling or disassembling the main board and the supporting board. In addition, when grabbing the motherboard, the handle can be adjusted to the second position by telescopic adjustment, so as to increase the distance between the handle and the motherboard, which is convenient for the user to hold and grab by hand, while assembling electronic components (such as PCIe cards and RAID card, etc.) on the main board, the handle can be telescopically adjusted to the first position to reduce the distance between the handle and the main board, so that the electronic components can be smoothly installed on the main board in the limited casing space.

Although the utility model is disclosed above with the foregoing embodiments, it is not intended to limit the utility model, and any person skilled in the art should be able to make some changes without departing from the spirit and scope of the utility model and retouching, so the patent protection scope of the utility model must be defined by the scope of the appended claims of the utility model as the criterion.

Claims (10)

1. a telescopic screw piece, is characterized in that, this telescopic screw piece comprises:

One joint pin, this joint pin comprises a main body and a bolt apertures, this bolt apertures is arranged in this main body;

Leader, this handle comprises a holding end, an inner groovy and a through hole, and this inner groovy is arranged with in this holding end, and wherein the section of this inner groovy is non-circular and comprises a diapire and one week sidewall, this through hole is positioned at this diapire, and this through hole and be formed with a limiting section for this week between sidewall; And

One screw, this screw comprises a body of rod, an external thread part and a spiral shell head, this external thread part is positioned at one end of this body of rod, this spiral shell head is positioned at the other end of this body of rod, and the section of this spiral shell head is to shape that should inner groovy, wherein this external thread part is sequentially through this inner groovy, this through hole be screwed together in this bolt apertures, and this limiting section telescopically that makes this handle is resisted against this joint pin and in a primary importance, or is resisted against this spiral shell head and in a second place.

2. telescopic screw piece as claimed in claim 1, is characterized in that, this joint pin also comprises a slotted eye, and this slotted eye and this bolt apertures are interconnected, and relative this bolt apertures of this slotted eye is away from this spiral shell head.

3. telescopic screw piece as claimed in claim 2, is characterized in that, the width of this slotted eye is greater than the width of this bolt apertures, and the height distance of this slotted eye is greater than the length of this external thread part.

4. telescopic screw piece as claimed in claim 1, is characterized in that, when this external thread part spiral shell turns through this bolt apertures, this spiral shell head is arranged in this inner groovy.

5. telescopic screw piece as claimed in claim 1, is characterized in that, this holding end comprises an expanded head part, and wherein all sides of this expanded head part are provided with an anti-slip section.

6. a mainboard combining structure, this mainboard combining structure comprises:

One mainboard, is characterized in that, this mainboard comprises one first side, one second side and a perforation, and wherein this perforation is through this first side and this second side;

One board, this board is positioned at this second side, and this board comprises a reference column and towards this perforation extension, wherein this reference column comprises an inner bolt hole; And

Telescopic screw piece as described in any one in claim 1 to 5, wherein this main body of this joint pin is connected in this mainboard, and this bolt apertures and this perforation are interconnected, and this external thread part is also through this bolt apertures and screw togather and be positioned this inner bolt hole.

7. mainboard combining structure as claimed in claim 6, is characterized in that, this joint pin also comprises a closing portion, and this closing portion is convexly set in all sides of this main body, and wherein this main body insert group is bored a hole in this, and this closing portion is resisted against this first side.

8. mainboard combining structure as claimed in claim 7, is characterized in that, this handle also comprises a link with respect to this holding end, and wherein this link is provided with a ring protuberance, and at this handle, during in this primary importance, this ring protuberance correspondence is resisted against this closing portion.

9. mainboard combining structure as claimed in claim 6, is characterized in that, this joint pin is fixedly arranged on this mainboard.

10. mainboard combining structure as claimed in claim 6, is characterized in that, this screw also comprises a positioning convex portion, and this positioning convex portion is connected in this body of rod and between this external thread part and this spiral shell head, wherein this positioning convex portion is resisted against this joint pin.