CN106763027A - A kind of panel fastener and panel fastening method - Google Patents

Abstract

The present invention relates to a panel fastener. The panel fastener includes a mounting cap, a bolt, a fixed sleeve and an elastic element. The top of the fixed sleeve is provided with a limiting groove that runs through the wall of the fixed sleeve. The latch includes a pin shaft and a fastening portion, and the pin shaft has a first limiting portion and the first step, the upper part of the fastening part has a second step, the fixed sleeve is fixedly connected with the first plate, the mounting cap is set on the outer periphery of the fixed sleeve and can slide up and down, and the elastic element is pressed against the mounting cap and fixed Between the sleeves, the bolt is passed through the fixed sleeve and passed through the fixed sleeve to be fixedly connected with the installation cap. The first limiting part and the limiting groove can limit the rotation direction and angle of the installation cap and the bolt. When the installation cap is rotated to a fixed angle and the installation cap is released, the fastening part is against the lower part of the second plate, and the second step is engaged in the second through hole to limit the rotation of the bolt. The invention effectively prevents the panel fasteners from being loosened after being locked under the action of external force or vibration, and greatly improves the locking effectiveness of the panel fasteners.

Description

Panel fastener and panel fastening method

technical field

The invention belongs to the technical field of fixed connection and installation, and in particular relates to a panel fastener and a panel fastening method.

Background technique

At present, in the process of installation and use of a chassis, an electrical cabinet, or a console, etc., panels that need to rotate and cooperate with each other are often used. Panel fasteners provide a fastening system for quickly and easily fastening together or separating two panels face-to-face. Existing panel fasteners include a fixed frame, a cap capable of rotating and sliding on the fixed frame, and a latch fixed on the cap. Among the two panels, a round hole is provided on one panel, and a square hole is provided on the other panel, and the bolt is used to cooperate with the round hole and the square hole on the panel. The fixed frame is rigidly fixed on the panel with the round hole. When in use, you need to turn the cap by hand until the head of the pin just coincides with the square hole on the panel, then press down on the cap to make the pin pass through the square hole, then turn the cap around 90° and let go to fix the two panels together.

Existing panel fasteners of this type have been found to have a number of disadvantages in use:

First, when in use, you need to press the cap to pass the pin through the square hole. Since the cap and the pin can rotate 360° around their axis at will, you need to align the position of the pin before pressing the cap so that the pin Just align with the square hole, which takes some time to find the alignment, and the efficiency is low;

Second, when the existing panel fasteners fasten the two panels, because the cap and the latch can rotate 360° around their own axis at will, it is easy to have a situation where the locking is not in place, and the operator turns the cap When the position and angle are not in place, such as turning to a 90° position, this can also temporarily fasten the two panels to produce a false lock, but in this state it is easy to cause the lock to fail, and the two panels will be in use detached and separated;

Third, after the existing panel fasteners fasten the two panels, even if the cap and the latch are rotated into place, a lock is formed. Since the cap and the pin can freely rotate 360° around their own axis, under the influence of external force or vibration, the pin will rotate, and the lock between the pin and the panel is easy to dislocate and loosen, and the two panels will fall off and separate during use. , the lock fails.

Contents of the invention

The technical problem to be solved by the present invention is to provide a panel fastener that has a simple structure, does not require alignment, and can effectively prevent loosening after fastening.

In order to solve the above technical problems, a technical solution adopted by the present invention is: a panel fastener used for locking between two connected plates, the two plates are respectively the first plate and For the second plate, the first plate is provided with a first through hole, and the second plate is provided with a second through hole, and the second through hole is a special-shaped hole. The panel fastener includes a mounting cap, a latch, a fixing sleeve and an elastic element. Both the mounting cap and the fixing sleeve are cylindrical structures with lower openings, and the top of the fixing sleeve is provided with a limiting groove that runs through the wall of the fixing sleeve. , the limiting groove communicates with the inner cavity of the fixed sleeve so that the top of the fixed sleeve also forms an opening, and the latch includes a head, a pin shaft and a fastening part matching the second through hole from top to bottom in sequence, The pin shaft has a first limiting portion and a first step, the upper part of the fastening portion has a second step, and the fixed sleeve is erected on the first plate at a position aligned with the first through hole and can be aligned with the first through hole. The first plate forms a rigid fixed connection, the installation cap is set on the outer circumference of the fixed sleeve and can slide up and down along the outer circumference of the fixed sleeve and rotate along the outer circumference of the fixed sleeve, and the elastic element is pressed against and mounted on the installation cap and the fixed sleeve. Between the fixed sleeves, the elastic element can provide an elastic force to push the installation cap to slide upwards, the pin is passed through the fixed sleeve and the head of the latch passes through the upper opening of the fixed sleeve and is rigidly fixedly connected with the installation cap, so The mounting cap can drive the latch to move up and down together.

The pin has a retracted position and an extended position in the path of up and down movement. When the pin is in the retracted position, the elastic element drives the mounting cap and the pin to slide upward together and makes the first step of the pin abut against the top of the inner cavity of the fixed sleeve. On the wall so as to keep the fastening part of the bolt shrinking in the inner chamber of the fixed sleeve; when the bolt is in the extended position, the mounting cap and the bolt move downward together so that the fastening part of the bolt protrudes out of the inner cavity of the fixed sleeve and located below the mount.

When the mounting cap is pressed downward to make the latch pin extend, the fastening part can pass through the first through hole and the second through hole in sequence and be located under the second plate. At this time, the rotating mounting cap can drive The fastening part rotates to switch positions. During the rotation of the installation cap, the first limiting part cooperates with the limiting groove to limit the rotation direction and angle of the installation cap and the latch, and the installation cap can only be rotated and fixed in a single direction. Angle.

When the installation cap is rotated to the fixed angle and the installation cap is released, the position of the buckling part is staggered from the second through hole, and the buckling part is against the second plate under the action of the elastic force of the elastic element The lower part of the panel, the second step is snapped into the second through hole to limit the rotation of the installation cap and the latch, and the panel fastener buckles the first plate and the second plate to hold the first plate and the second plate Interlocking of components.

Preferably, the pin shaft of the bolt is further provided with a second limiting portion, and when the bolt moves to a switching position between the retracted position and the extended position, the second limiting portion and the limiting groove are mutually The fit can limit the rotation of the bolt along its axis, which can only move up and down.

Specifically, the pin shaft is in the shape of a stepped shaft, and the pin shaft includes a cylindrical upper shaft and a lower shaft. The upper section of the upper shaft is provided with a second cut surface from top to bottom, and the second cut surface has two and parallel to each other, the upper shaft part between the two second cut planes constitutes the second limiting part, the bottoms of the two second cut planes form the first step on the upper shaft, the limiting part The groove width of the positioning groove is smaller than the shaft diameter of the upper shaft, and only the second limiting part of the upper shaft can pass through the limiting groove, and only when the second section corresponds to the position of the groove wall of the limiting groove, the second The limiting part can slide up and down in the limiting groove, and the lower shaft can pass through the second through hole.

Further, the upper section of the second limiting part is also provided with a first cut plane from top to bottom, and there are two first cut planes parallel to each other, and the first cut plane between the two first cut planes is Parts of the two limiting parts constitute the first limiting part, the first cut plane intersects the second cut plane, and the distance between the two first cut planes is smaller than the distance between the two second cut planes, When the latch moves down until the first limiting part is located in the limiting groove, the rotating mounting cap can drive the first limiting part to rotate in the limiting groove, and the groove wall of the limiting groove and the edge of the first limiting part There is also a notch at the position where the rotation corresponds to the contact, and when the edge of the first limiting part turns into the notch, the notch can block the first limiting part and thereby limit the rotation of the bolt and the installation cap.

Preferably, the bottom of the fixing sleeve has a raised special-shaped annular guide part, the first through hole is a special-shaped hole matching the shape of the guide part, and the guide part can be aligned and inserted into the first through hole An orientation where the fixing sleeve is fixedly installed on the first board is defined.

Specifically, the bottom of the fixing sleeve has second serrations distributed along the outer periphery of the guide portion in the circumferential direction, and the fixing sleeve is fixed on the first plate by pressure riveting of the second serrations.

Specifically, the head of the bolt is formed with first serrations distributed along the circumferential direction, and the inner top of the installation cap is provided with a counterbore corresponding to the head, and the head is inserted into the counterbore, and the bolt It is fixed on the installation cap through the first serrated pressure riveting fit.

Preferably, the mounting cap can only be rotated by 90° in a single direction.

Preferably, knurling is provided on the outer circumference of the installation cap.

A panel fastening method for interlocking pivotally connected first and second panels, said first and second panels being superimposed on each other and each being rotatable relative to said pivot, The first plate is opened with a first through hole, and the second plate is opened with a second through hole. Fastening the first panel and the second panel using the above-mentioned panel fasteners includes the following steps:

1) Align and insert the guide part of the fixing sleeve of the panel fastener into the first through hole of the first plate, and fix the fixing sleeve on the first plate by pressure riveting;

2) Turn the second plate to the position to be locked. At this time, the first through hole communicates with the second through hole, and the fastening part of the latch is aligned with the position of the first through hole and the second through hole;

3) Press down the installation cap so that the fastening part of the pin passes through the first through hole and the second through hole in sequence. It can only move up and down under coordination restrictions;

4) After the fastening part passes through the second through hole, the lower shaft of the bolt is located in the second through hole, the first limiting part is located in the limiting groove, and the installation cap is rotated until the first limiting part is The gap in the limiting groove is blocked, and the mounting cap is rotated by a fixed angle so that the fastening part of the latch is staggered from the position of the second through hole;

5) Loosen the mounting cap, the mounting cap is pulled upwards under the action of the elastic element, and the fastening part of the latch is against the lower part of the second plate so that the panel fastener connects the first plate and the second plate snap lock, the second step snaps into the second through hole to limit the rotation of the installation cap and the latch.

The orientation words mentioned above, such as front, rear, left, right, up, and down, are defined in the orientation of the panel fastener in normal use.

The scope of the present invention is not limited to technical solutions formed by a specific combination of the above technical features, but also covers other technical solutions formed by any combination of the above technical features or equivalent features. For example, a technical solution formed by replacing the above-mentioned features with (but not limited to) technical features with similar functions disclosed in this application.

Due to the application of the above technical solutions, the present invention has the following advantages compared with the prior art: the rotation direction and angle of the mounting cap and the latch can be determined through the cooperation of the second limiting part and the limiting groove, ensuring that the panel fasteners are fastened The latch can be rotated in place when locked; the second step of the fastening part engages with the second through hole after the latch is rotated in place to ensure that the panel fasteners are not affected by external force or vibration after the fastening and locking, effectively preventing the panel The fasteners are locked and loosened under the action of external force or vibration, which greatly improves the stability and effectiveness of locking the panel fasteners.

Description of drawings

Fig. 1 is a schematic diagram of the expanded first panel and the second panel;

Fig. 2 is a schematic diagram of the three-dimensional structure of the panel fastener when the latch is in the retracted position;

Fig. 3 is a three-dimensional structural schematic diagram of the panel fastener when the latch is in an extended position;

Figure 4 is a top view of the panel fastener of the present invention;

Fig. 5 is a sectional view of A-A of Fig. 4 when the latch is in the retracted position;

Fig. 6 is a B-B sectional view of Fig. 4 when the latch is in the retracted position;

Fig. 7 is a sectional view of A-A of Fig. 4 when the latch is in the unfolded position;

Fig. 8 is a B-B sectional view of Fig. 4 when the latch is in the unfolded position;

Fig. 9 is an exploded view of the panel fastener of the present invention;

Figure 10 is a schematic diagram of the three-dimensional structure of the panel fastener when the pin is in the retracted position (the installation cap is hidden);

Figure 11 is a schematic diagram of the three-dimensional structure of the panel fastener when the pin is in the extended position (the installation cap is hidden);

Figure 12 is a top view of Figure 10;

Figure 13 is a top view of Figure 11;

Fig. 14 is a three-dimensional structural schematic diagram of a fixed sleeve;

Figure 15 is a bottom view of Figure 14;

Fig. 16 is a schematic diagram of a three-dimensional structure of the latch;

Fig. 17 is a schematic diagram of another three-dimensional structure of the latch;

Among them: 1. Mounting cap; 2. Pin; 3. Fixed sleeve; 4. Elastic element; 5. Head; 6. Pin shaft; 7. Fastening part; 11. Counterbore; Bit groove; 32, gap; 33, guide part; 34, second sawtooth; 35, third step; 51, first sawtooth; 61, first limit part; 62, second limit part; 63, first Step; 64, upper shaft; 65, lower shaft; 71, second step; 101, first plate; 102, second plate; 103, first through hole; 104, second through hole; 641, first section; 642, the second section;.

detailed description

As shown in FIG. 1 , the two face-to-face attached panels are respectively a first panel 101 and a second panel 102 . The first plate 101 and the second plate 102 are connected by pivoting. Both the first plate 101 and the second plate 102 can rotate relative to the pivot, and rotating one of the plates can enable the two plates to have a mutual unfolded position and a mutually overlapping position. The first plate 101 defines a first through hole 103 , and the second plate 102 defines a second through hole 104 , both of the first through hole 103 and the second through hole 104 are special-shaped holes. In this embodiment, the second through hole 104 is a rectangular hole. When the first plate 101 and the second plate 102 are in overlapping positions, the first through hole 103 and the second through hole 104 are opposite to each other and communicate with each other.

In order to quickly lock and unlock the first panel 101 and the second panel 102 in overlapping positions, a panel fastener according to the present invention is used. The specific structure of the panel fastener will be described in detail below.

As shown in FIGS. 2 to 17 , a panel fastener according to the present invention includes a mounting cap 1 , a bolt 2 , a fixing sleeve 3 and an elastic element 4 .

The mounting cap 1 is a cylindrical structure with an open bottom. Knurls 12 are provided on the outer circumference of the mounting cap 1 . It can provide enough friction coefficient to facilitate the operator to twist by hand. A counterbore 11 is opened on the top of the inner cavity of the installation cap 1 .

The fixing sleeve 3 is erected on the first plate 101 at a position aligned with the first through hole 103 and can form a rigid fixed connection with the first plate 101 . The fixing sleeve 3 is also a cylindrical structure with an open bottom, and the diameter of the fixing sleeve 3 is smaller than that of the installation cap 1 . The installation cap 1 can be sleeved on the outer periphery of the fixed sleeve 3 and can slide up and down along the outer periphery of the fixed sleeve 3 and rotate along the outer periphery of the fixed sleeve 3 . The top of the fixing sleeve 3 is provided with a limiting groove 31 that runs through the wall of the fixing sleeve 3 , and the limiting groove 31 communicates with the inner cavity of the fixing sleeve 3 so that the top of the fixing sleeve 3 also forms an opening. In this embodiment, the limiting slot 31 is a rectangular slot. Notches 32 are respectively defined on the groove walls on both sides of the limiting groove 31 , and the notches 32 are in the shape of a semicircle. The positions of the notches 32 on both sides are staggered from each other. The bottom of the fixing sleeve 3 also has a protruding shaped ring-shaped guide portion 33 . The first through hole 103 is a shaped hole matching the shape of the guide portion 33 . The alignment and insertion of the guide portion 33 into the first through hole 103 can define the orientation in which the fixing sleeve 3 is fixedly installed on the first plate 101 . In this way, the installation position and direction of the panel fasteners can be clarified, which facilitates standardized installation. The bottom of the fixing sleeve 3 has second serrations 34 distributed along the outer circumference of the guide portion 33 along the circumferential direction, and the fixing sleeve 3 is fixed on the first plate 101 by pressure riveting through the second serrations 34 .

There is also a third step 35 on the outer periphery of the fixing sleeve 3 . The elastic element 4 in this embodiment is a spring, and the elastic element 4 is sleeved on the outer circumference of the fixed sleeve 3, the upper end is against the top of the inner cavity of the installation cap 1, and the lower end is against the third step 35, the elastic element 4 4 is in a compressed state between the mounting cap 1 and the fixing sleeve 3 . The elastic element 4 can provide elastic force to push the installation cap 1 to slide upward.

The bolt 2 includes a head 5 , a pin shaft 6 , and a fastening portion 7 that matches the pattern of the second through hole 104 from top to bottom. The bolt 2 is passed through the fixed sleeve 3 and the head 5 of the bolt 2 passes through the upper opening of the fixed sleeve 3 and is rigidly fixedly connected with the installation cap 1 . The mounting cap 1 can drive the bolt 2 to move up and down together.

Specifically, the head 5 of the bolt 2 can be inserted into the counterbore 11 to determine the installation position of the bolt 2 in the installation cap 1 . First serrations 51 are distributed on the outer periphery of the head 5 along the circumferential direction, and the pin 2 is fixed on the installation cap 1 through the first serrations 51 by force riveting.

The pin shaft 6 is in the shape of a stepped shaft, and the pin shaft 6 includes a cylindrical upper shaft 64 and a lower shaft 65 . The shaft diameter of the upper shaft 64 is larger than the shaft diameter of the lower shaft 65 . The diameter of the upper shaft 64 is also greater than the width of the limiting groove 31 . The lower shaft 65 can freely pass through the second through hole 104 .

The upper section of the upper shaft 64 defines a second cut surface 642 from top to bottom. There are two second cut surfaces 642 parallel to each other, and the portion of the upper shaft 64 between the two second cut surfaces 642 forms the second limiting portion 62 . Bottoms of the two second cut surfaces 642 form a first step 63 on the upper shaft 64 . Only the second limiting portion 62 of the upper shaft 64 can pass through the limiting groove 31, and only when the second cutting surface 642 is opposite to the groove wall of the limiting groove 31, the second limiting portion 62 can be limited. Slide up and down in the bit groove 31.

The upper section of the second limiting portion 62 is also provided with a first cut surface 641 from top to bottom. There are two first cut surfaces 641 parallel to each other, and the part of the second limiting portion 62 between the two first cut surfaces 641 constitutes the first limiting portion 61 . The first cut plane 641 intersects with the second cut plane 642 , and the distance between the two first cut planes 641 is smaller than the distance between the two second cut planes 642 . In this way, the bolt 2 can move downward until the first limiting portion 61 is located in the limiting groove 31 , and the latch 2 can rotate in the limiting groove 31 at a certain angle. The edge of the first limiting portion 61 corresponds to the notch 32, and when the edge of the first limiting portion 61 turns into the notch 32, the notch 32 can block the first limiting portion 61 and thereby limit Rotation of pin 2 and mounting cap 1. The angle at which the bolt 2 can rotate can be determined by setting the distance between the two first cut planes 641, the position of the notch 32, and the depth of the notch 32. Orientation rotated 90°.

The fastening part 7 is fixedly arranged on the lower end of the lower shaft 65, and the shape of the fastening part 7 matches the second through hole 104, and is rectangular, and a chamfer is provided on the lower part of the fastening part 7 to facilitate the fastening part. 7 through the second through hole 104. A second step 71 is also provided on the upper part of the fastening portion 7 .

The bolt 2 has a retracted position and an extended position in the path of the up and down movement. When the bolt 2 is in the retracted position, the elastic element 4 drives the installation cap 1 and the bolt 2 to slide upward together and makes the first step 63 of the bolt 2 abut against the top wall of the inner cavity of the fixed sleeve 3 so as to keep the bolt 2 fastened. Part 7 shrinks in the inner cavity of the fixed sleeve 3; when the bolt 2 is in the extended position, the installation cap 1 and the latch 2 move downward together so that the fastening portion 7 of the latch 2 protrudes out of the inner cavity of the fixed sleeve 3 and Located under the fixed sleeve 3.

When the latch 2 moves to the switching position between the retracted position and the extended position, the second limiting portion 62 cooperates with the limiting groove 31 to limit the rotation of the latch 2 along its axis, and the latch 2 can only Moving up and down.

When the mounting cap 1 is pressed downward to make the latch 2 in the protruding position, the fastening portion 7 can sequentially pass through the first through hole 103 and the second through hole 104 and be located under the second plate 102. At this time , the first limiting part 61 is located in the limiting groove 31, and the rotating mounting cap 1 can drive the fastening part 7 to rotate and switch positions. During the rotation of the mounting cap 1, the first limiting part 61 and the limiting groove 31 cooperate with each other to limit the rotation direction and angle of the mounting cap 1 and the bolt 2, and the mounting cap 1 can only rotate in a single direction at a fixed angle.

When the installation cap 1 is rotated to the fixed angle and the installation cap 1 is loosened, the positions of the buckling part 7 and the second through hole 104 are staggered, and the buckling part 7 is pressed against by the elastic force of the elastic element 4 Living in the lower part of the second plate 102, the second step 71 snaps into the second through hole 104 to limit the rotation of the mounting cap 1 and the latch 2, and the panel fastener connects the first plate 101 and the second plate The member 102 is buckled to keep the first plate 101 and the second plate 102 locked to each other.

The specific method of using the above-mentioned panel fasteners to fasten panels is as follows:

The panel fastening method comprises the steps of:

1) Align the guide part 33 of the fixing sleeve 3 of the panel fastener with the first through hole 103 of the first plate 101 and insert it, and fix the fixing sleeve 3 on the first plate 101 by pressure riveting, so that , the panel fastener is fixed on the first panel 101;

2) Turn the second plate 102 to the position to be locked. At this time, the first through hole 103 communicates with the second through hole 104, and the fastening part 7 of the latch 2 is aligned with the first through hole 103 and the second through hole. 104 location;

3) Press down the mounting cap 1 so that the fastening part 7 of the pin 2 passes through the first through hole 103 and the second through hole 104 in sequence. The position part 62 and the limit groove 31 can only move up and down under the cooperation limit;

4) After the fastening part 7 passes through the second through hole 104, the lower shaft 65 of the bolt 2 is located in the second through hole 104, the first limiting part 61 is located in the limiting groove 31, and the installation cap is rotated 1 until the first limiting portion 61 is blocked by the notch 32 in the limiting groove 31, it is confirmed that the installation cap 1 has rotated a fixed angle so that the buckling portion 7 of the latch 2 is staggered from the second through hole 104;

5) Loosen the installation cap 1, the installation cap 1 is pulled upwards under the action of the elastic element 4, and the fastening part 7 of the latch 2 is pressed against the lower part of the second plate 102 so that the panel fastener secures the first plate The part 101 and the second plate part 102 are buckled and locked, and the second step 71 is snapped into the second through hole 104 to limit the rotation of the installation cap 1 and the latch 2 .

It can be seen from the above that the structural arrangement of the first through hole 103 and the guide portion 33 of the fixing sleeve 3 makes the installation orientation of the panel fastener on the first panel 101 clear, which is convenient for standardized installation and subsequent operations. The arrangement of the portion 62 and the limiting groove 31 makes it unnecessary to align when the bolt 2 protrudes downwards, and the fastening portion 7 of the bolt 2 can be pushed to align with the first through hole 103 and the second through hole 104 by directly pressing the mounting cap 1 . wear out. The locking operation is facilitated, time is saved, and the locking can be completed quickly. The arrangement of the first limiting portion 61 , the limiting groove 31 and the notch 32 enables the fastening portion 7 to rotate by a certain angle after passing through the second through hole 104 , effectively preventing false locking from occurring. Make sure the catch 7 locks into place. The setting of the second step 71 on the fastening part 7 can ensure that the panel fasteners will not fall off due to the influence of external force or vibration after locking the first plate 101 and the second plate 102, which greatly improves the stability of locking and effectiveness.

As mentioned above, we have fully described according to the purpose of the present invention, but the present invention is not limited to the above-mentioned embodiments and implementation methods. Practitioners in the relevant technical fields may make various changes and implementations within the scope permitted by the technical ideas of the present invention.

Claims (10)

1. A panel fastener used for locking between two connected panels, the two panels are respectively a first panel (101) and a second panel (102), and the first panel A plate (101) is opened with a first through hole (103), the second plate (102) is opened with a second through hole (104), and the second through hole (104) is a special-shaped hole. That is: the panel fastener includes a mounting cap (1), a pin (2), a fixing sleeve (3) and an elastic element (4), and both the mounting cap (1) and the fixing sleeve (3) are open at the bottom Cylindrical structure, the top of the fixed sleeve (3) is provided with a limit groove (31) that runs through the wall of the fixed sleeve (3), and the limit groove (31) communicates with the inner cavity of the fixed sleeve (3) so that The top of the fixed sleeve (3) also forms an opening, and the pin (2) sequentially includes a head (5), a pin shaft (6) and a fastening part that matches the hole pattern of the second through hole (104) from top to bottom (7), the pin shaft (6) has a first limiting part (61) and a first step (63), the upper part of the buckling part (7) has a second step (71), the fixed The sleeve (3) is aligned with the position of the first through hole (103) and erected on the first plate (101) and can form a rigid fixed connection with the first plate (101). The installation cap (1) is sleeved On the outer circumference of the fixed sleeve (3) and can slide up and down along the outer circumference of the fixed sleeve (3) and rotate along the outer circumference of the fixed sleeve (3), the elastic element (4) is pressed against the mounting cap (1) and fixed Between the sleeves (3), the elastic element (4) can provide elastic force to push the installation cap (1) to slide upwards, the pin (2) is passed through the fixed sleeve (3) and the head of the pin (2) (5) Pass through the upper opening of the fixing sleeve (3) and rigidly connect with the installation cap (1), the installation cap (1) can drive the latch (2) to move up and down together, The pin (2) has a retracted position and an extended position in the path of up and down movement, when the pin (2) is in the retracted position, the elastic element (4) drives the mounting cap (1) and the pin (2) to slide upward together And make the first step (63) of the bolt (2) stand on the top wall of the inner cavity of the fixed sleeve (3) so as to keep the fastening part (7) of the latch (2) shrunk in the inner cavity of the fixed sleeve (3) ; When the pin (2) is in the extended position, the installation cap (1) and the pin (2) move downward together so that the fastening part (7) of the pin (2) protrudes out of the inner cavity of the fixing sleeve (3) And located below the fixed sleeve (3), When the installation cap (1) is pressed down to make the pin (2) in the protruding position, the fastening part (7) can pass through the first through hole (103) and the second through hole (104) in sequence and is located at Below the second plate (102), at this time, rotating the mounting cap (1) can drive the fastening part (7) to rotate and switch positions, and during the rotation of the mounting cap (1), the first limiting part (61) cooperates with the limit groove (31) to limit the rotation direction and angle of the installation cap (1) and the bolt (2), and the installation cap (1) can only rotate in a single direction to a fixed angle. When the installation cap (1) is rotated to the fixed angle and the installation cap (1) is loosened, the positions of the fastening part (7) and the second through hole (104) are staggered, and the fastening part (7) is in the Under the action of the elastic force of the elastic element (4), it bears against the lower part of the second plate (102), and the second step (71) snaps into the second through hole (104) to limit the installation cap (1) and The latch (2) rotates, and the panel fastener buckles the first plate (101) and the second plate (102) to keep the first plate (101) and the second plate (102) locked to each other. 2. A panel fastener according to claim 1, characterized in that: the pin shaft (6) of the bolt (2) is also provided with a second limit portion (62), and the bolt (2) ) During the process of moving the switching position between the retracted position and the extended position, the second limiting part (62) cooperates with the limiting groove (31) to limit the rotation of the pin (2) along its axis, and the pin (2) Can only move up and down. 3. A panel fastener according to claim 2, characterized in that: the pin shaft (6) is in the shape of a stepped shaft, and the pin shaft (6) includes a cylindrical upper shaft (64) and The lower shaft (65), the upper section of the upper shaft (64) is provided with a second section (642) from top to bottom, the second section (642) has two parallel to each other, the two second section The part of the upper shaft (64) between (642) constitutes the second limiting part (62), and the bottoms of the two second cut surfaces (642) form the first step on the upper shaft (64) ( 63), the groove width of the limiting groove (31) is smaller than the shaft diameter of the upper shaft (64), and only the second limiting part (62) of the upper shaft (64) can pass through the limiting groove (31) , and only when the second cut surface (642) corresponds to the position of the groove wall of the limiting groove (31), the second limiting part (62) can slide up and down in the limiting groove (31), and the lower shaft ( 65) can pass through said second through hole (104). 4. A panel fastener according to claim 3, characterized in that: the upper section of the second limiting portion (62) is also provided with a first cut plane (641) from top to bottom, the said There are two first cut planes (641) parallel to each other, and the part of the second limiting part (62) between the two first cut planes (641) constitutes the first limiting part (61), The first cut plane (641) intersects the second cut plane (642), the distance between the two first cut planes (641) is smaller than the distance between the two second cut planes (642), when the bolt ( 2) When moving downward until the first limiting part (61) is located in the limiting groove (31), the rotating installation cap (1) can drive the first limiting part (61) to rotate in the limiting groove (31), There is also a notch (32) at the position where the groove wall of the limiting groove (31) is in contact with the edge of the first limiting part (61) in rotation, and when the edge of the first limiting part (61) turns to the notch ( 32), the notch (32) can block the first limiting portion (61) and thereby limit the rotation of the bolt (2) and the mounting cap (1). 5. A panel fastener according to claim 4, characterized in that: the bottom of the fixing sleeve (3) has a raised special-shaped ring-shaped guide portion (33), and the first through hole ( 103) is a special-shaped hole matching the shape of the guide part (33), and the guide part (33) is aligned and inserted into the first through hole (103) to define a fixed sleeve (3) fixedly installed on the first plate (101) ) on the orientation. 6. A panel fastener according to claim 5, characterized in that: the bottom of the fixing sleeve (3) has second serrations (34) distributed along the outer circumference of the guide part (33), so that The fixing sleeve (3) is riveted and fixed on the first plate (101) through the second sawtooth (34). 7. A panel fastener according to claim 1, characterized in that: the head (5) of the bolt (2) is formed with first serrations (51) distributed along the circumferential direction, and the mounting cap The inner top of (1) is provided with a counterbore (11) corresponding to the head (5), the head (5) is inserted into the counterbore (11), and the pin (2) passes through the first sawtooth (51) ) is press riveted and fixed on the mounting cap (1). 8. A panel fastener according to claim 1, characterized in that: the mounting cap (1) can only rotate 90° in a single direction. 9 . The panel fastener according to claim 1 , characterized in that: knurls ( 12 ) are provided on the outer circumference of the mounting cap ( 1 ). 10. A panel fastening method for interlocking pivotally connected first panel (101) and second panel (102), said first panel (101) and second panel (102) ) are stacked on each other and can rotate relative to the pivot, the first plate (101) is provided with a first through hole (103), and the second plate (102) is provided with a second through hole (104 ), characterized in that: fastening the first panel (101) and the second panel (102) using the panel fastener according to claim 5, comprising the following steps: 1) Align the guide part (33) of the fixing sleeve (3) of the panel fastener with the first through hole (103) of the first panel (101) and insert it, and press the fixing sleeve (3) fixed on the first plate (101); 2) Turn the second plate (102) to the position to be locked. At this time, the first through hole (103) is in communication with the second through hole (104), and the buckle part (7) of the latch (2) is aligned The positions of the first through hole (103) and the second through hole (104); 3) Press down the installation cap (1) so that the fastening part (7) of the pin (2) passes through the first through hole (103) and the second through hole (104) in sequence, during this pressing process, the The installation cap (1) and the latch (2) can only move up and down under the cooperation of the second limiting part (62) and the limiting groove (31); 4) After the fastening part (7) passes through the second through hole (104), the lower shaft (65) of the latch (2) is located in the second through hole (104), and the first limiting part ( 61) Located in the limit groove (31), turn the installation cap (1) until the first limit part (61) is blocked by the gap (32) in the limit groove (31), and the installation cap (1) rotates The fixed angle makes the fastening part (7) of the latch (2) stagger from the second through hole (104); 5) Loosen the installation cap (1), the installation cap (1) is pulled up under the action of the elastic element (4), and the fastening part (7) of the latch (2) is against the second plate (102 ) to make the panel fastener fasten and lock the first plate (101) and the second plate (102), and the second step (71) snaps into the second through hole (104) to limit the installation cap ( 1) and latch (2) turn.