CN217769387U

CN217769387U - Embedded desktop line box with adjustable fastening structure

Info

Publication number: CN217769387U
Application number: CN202221502108.7U
Authority: CN
Inventors: 王宏斌; 陈杰
Original assignee: Hangzhou Bedova Technology Co ltd
Current assignee: Hangzhou Bedova Technology Co ltd
Priority date: 2022-06-15
Filing date: 2022-06-15
Publication date: 2022-11-08
Anticipated expiration: 2032-06-15

Abstract

The utility model relates to an office furniture field, especially an embedded desktop line box of adjustable fastening structure in area. When the existing embedded desktop wire box is installed, the wire box is loosened and the use is influenced due to the fact that the opening precision of the desk board and the thickness of the desk board are not comfortable. Therefore, the utility model provides a take adjustable fastening structure's embedded desktop line box, including the line box that can imbed the installation, its top periphery extends line box lateral wall and forms the convex shoulder, its lateral wall encircles and sets up many adjustable fastening structure, fastening structure includes the locked groove that line box lateral wall surface set up and can follow the locked groove and reciprocate and the hasp of latched position, hasp side and hasp top are equipped with unlocking switch respectively and support the location portion of leaning on the table, operation unlocking switch can make the hasp unblock, location portion can match with the convex shoulder and press from both sides tight table, the opening is established to the locked groove bottom and is formed the hasp installation entry. The utility model discloses an adjustable fastening structure is with line box fastening installation on the table, but fastening structure manual regulation, the different table thickness of adaptation.

Description

Embedded desktop line box with adjustable fastening structure

Technical Field

The utility model relates to an office furniture field, especially an embedded desktop line box of adjustable fastening structure in area.

Background

Present desk extensively adopts embedded desktop line box to keep the desktop clean and tidy, pleasing to the eye and reduce the potential safety hazard, can hold the installation in the desktop line box and get the supply socket of electricity usefulness, arrange and insert or connect the computer, the projecting apparatus, the wiring end of network, perhaps wear to establish power cord etc. in the line box, during operation desktop line box directly inlays and establishes in the mounting hole that the desktop was opened in advance, the fastening degree of line box installation receives the restriction of desktop trompil size and table thickness, the trompil size is accurate inadequately or table thickness not adaptation can all lead to the insecure easy not hard up of line box installation, the normal work of influence line box is got the electricity and is connected the threading.

SUMMERY OF THE UTILITY MODEL

The utility model discloses the technical problem who solves and the technical task who provides are to have the requirement to desktop trompil precision and table adaptation thickness to current embedded desktop line box, and trompil precision and table thickness are improper can all cause the line box installation not tight and not hard up, and then influence the technical problem of line box normal use, the utility model provides a take adjustable fastening structure's embedded desktop line box, the adjustable fastening structure of line box accessible from the area supports the table, makes line box fastening installation on the table, and fastening structure can manual regulation during the installation to deal with the actual conditions that table trompil precision is not enough and thickness differs.

The utility model provides a technical scheme that technical problem adopted: the utility model provides a take embedded desktop line box of adjustable fastening structure, includes the line box that can imbed the installation, line box top periphery extends line box lateral wall and forms the convex shoulder, characterized by encircle on the line box lateral wall and set up many adjustable fastening structure, fastening structure includes the locked groove that line box lateral wall surface set up and can follow the locked groove and reciprocate and the hasp of latched position, and hasp side and hasp top are equipped with the unblock switch that the unblock was used respectively and can support the location portion that leans on the table, and operation unblock switch can make the hasp unblock, and location portion can match with the convex shoulder and press from both sides tight table with the fastening line box, and the opening formation hasp installation entry is established to the locked groove bottom. The utility model discloses a encircle on the box lateral wall and set up many adjustable fastening structure, and utilize the tight table of locating part on the hasp among the fastening structure and the convex shoulder cooperation on the line box, make the line box fasten not rocking on the table when embedding the table, ensure that line box work is got electricity and is connected normal use such as threading, the tightness of line box installation does not rely on the trompil precision, during operation fastening structure can press from both sides tight interval according to table thickness adjustment, specifically the hasp reciprocates the height-adjusting, after target in place hasp latched position, make between the locating part at hasp top and the convex shoulder press from both sides tight interval and table thickness matching.

As further improvement and supplement to the above technical scheme, the utility model discloses a following technical measure: the locking groove comprises a vertically extending clamping groove arranged on the surface of the side wall of the line box and a tooth groove which is continuous up and down on the inner side of the clamping groove, and an opening at the lower end of the clamping groove forms the lock catch mounting inlet; the hasp includes the elastic plate that can be connected the fastener with the fastener of draw-in groove joint and middle section, and the elastic plate can be connected the fastener end and be the elastic swing around its middle section, and elastic plate one end elasticity tends the tooth's socket and sets up can with the tooth's socket meshing locking hasp from the lock tooth, and the elastic plate other end is established the arch and is stretched out the draw-in groove and form the unblock switch, presses the elastic plate tip perk that the unblock switch can make auto-lock tooth one side, withdraws from the tooth's socket to the hasp unblock from the lock tooth, the outer draw-in groove that extends of fastener upper portion forms location portion. The during operation fastener and draw-in groove joint guarantee the hasp can not deviate from the locked groove at the in-process that reciprocates, and the elastic plate locks the hasp through its self-locking tooth and the tooth's socket meshing that tend tooth's socket one end to set up simultaneously, presses the unblock switch of the elastic plate other end, and the elastic plate is connected the fastener section swing around the middle section, and the elasticity tip backward movement perk of tendency tooth's socket drives the self-locking tooth of this tip and withdraws from the tooth's socket and unlocks the hasp, presses to promote the unblock switch simultaneously and just can make the lock reciprocate along the locked groove.

The self-locking teeth horizontally and transversely extend, the upper side surfaces of the self-locking teeth and the corresponding upper side walls of the tooth grooves are inclined planes, when the unlocking switch is pushed upwards, the upper side surfaces of the self-locking teeth slide upwards along the upper side walls of the tooth grooves in an inclined mode, the self-locking teeth are made to exit from the tooth grooves, and the end portions of the elastic plates where the self-locking teeth are located are elastically tilted; the lower side surface of the self-locking tooth and the corresponding lower side wall of the tooth socket are horizontal planes, and the lower side surface of the self-locking tooth is propped against the lower side wall of the pressing tooth socket downwards when the self-locking tooth is meshed and locked with the tooth socket. The automatic unlocking of the lock catch in the upward moving process is realized through the matched inclined planes between the self-locking teeth and the tooth grooves: when the unlocking switch is pushed upwards to move the fastener upwards, the elastic plate and the self-locking teeth on the elastic plate move upwards together, the upper side surfaces of the self-locking teeth which are inclined planes slide upwards along the upper side wall of the tooth socket, the component of the acting force between the two inclined planes in the horizontal direction pushes the self-locking teeth to elastically exit the tooth socket, and the self-locking teeth and the end parts of the corresponding elastic plates tilt together; otherwise, when the fastener is pushed down, the two inclined planes of the self-locking teeth and the tooth sockets are far away, meanwhile, the lower side surfaces of the self-locking teeth, which are also horizontal planes, are abutted against and pressed against the corresponding lower side walls of the tooth sockets, the self-locking teeth and the tooth sockets are kept in a locking state, and at the moment, the self-locking teeth can tilt and retreat from the tooth sockets along with the swing of the elastic plates only by pressing the unlocking switch.

The fastener is a frame, the frame comprises a left frame and a right frame which are matched with the two sides of the clamping groove and an upper frame which is connected with the left frame and the right frame, the two ends of the upper frame are respectively connected with the top ends of the left frame and the right frame, and the positioning part is positioned on the extension section of the upper frame; the elastic plate is vertically arranged in a free space enclosed by the left frame, the right frame and the upper frame, two sides of the middle section of the elastic plate are connected with the left frame and the right frame through two connecting columns, one of the upper end and the lower end of the elastic plate is provided with a self-locking tooth, and the other end of the elastic plate is provided with an unlocking switch. The fastener is of a frame structure and comprises at least three frames, the left frame and the right frame are matched with the two sides of the clamping groove to realize the clamping connection of the fastener and the clamping groove, and the upper frame is used for arranging the positioning part; meanwhile, the elastic plate is vertically arranged in an empty position on the inner side of the frame, the two sides of the middle section of the elastic plate are respectively connected with the left frame and the right frame through a connecting column, the two ends of the elastic plate are respectively provided with the self-locking teeth and the unlocking switch, the positions of the self-locking teeth and the unlocking switch can be interchanged, and the situation that the end portion of the elastic plate corresponding to the self-locking teeth elastically tends to the tooth socket is only needed to be met, so that the self-locking teeth can be meshed and locked with the tooth socket.

The upper end of the elastic plate is provided with a self-locking tooth, and the lower end of the elastic plate is provided with an unlocking switch. Self-locking tooth and unblock switch are established respectively at both ends about the elastic plate, and the operating position that the hand pressed unblock switch is located the low department, convenient operation to can not touch location portion when pressing yet and take place to interfere.

The elastic plate is arranged in a gap formed by the upper frame, the lower frame, the left frame and the right frame in a surrounding manner. Two frames are connected by additionally arranging the lower frame, the whole fastener forms a hollow closed frame, the rigidity of the frame keeps better and is not easy to deform, and the fastener moves more smoothly in the clamping groove.

The elastic plate is formed by connecting a vertical plate above and an inclined plate below outwards and obliquely downwards, the included angle between the vertical plate and the inclined plate is an obtuse angle, the elasticity of the end part of the vertical plate tends to the tooth grooves and self-locking teeth to be arranged at the end part of the vertical plate, the unlocking switch is an bulge extending outwards from the end part of the inclined plate, and a reinforcing rib is connected between the end part of the vertical plate and the bulge. The elastic plate is composed of a vertical plate and an inclined plate which are integrally connected, an outward extending bulge is used as a pressing unlocking switch to facilitate operation, when unlocking is needed, the bulge is pressed to enable the whole elastic plate to swing around the middle section connecting end, the end part of the vertical plate is enabled to tilt and move outwards, and the self-locking tooth is also tilted to exit from the tooth groove along with the self-locking tooth; the reinforcing rib can promote the holistic swing elasticity of elastic plate, and the elastic force that the riser tip tends to the tooth's socket under the bellied circumstances of not pressing is bigger, and the meshing of auto-lock tooth and tooth's socket is tighter.

The line box comprises last box and lower box concatenation, the box lateral wall is located to the draw-in groove, the box lateral wall is equipped with the vertical guide slot that matches with the fastener down, and the cross-section of vertical guide slot is the U-shaped, and vertical guide slot upper end and draw-in groove lower extreme opening dock, and vertical guide slot lower extreme extends to box bottom surface down and forms the breach, the hasp can be followed the breach and put into and slide along vertical guide slot and get into the draw-in groove. The wire box is formed by splicing an upper box body and a lower box body, the two box bodies are respectively provided with a clamping groove and a vertical guide groove which can be butted, the vertical guide groove can guide the lock catch to be more quickly arranged in the locking groove, when the wire box is arranged, only a fastener part of the lock catch needs to be placed into the vertical guide groove from a notch on the bottom surface of the lower box, and the fastener is pushed upwards to slide along the vertical guide groove to enter the clamping groove; the cross section of the vertical guide groove is U-shaped, so that the lock catch can be conveniently and quickly placed.

The line box is circular, and 180 degrees surrounding of interval set up two adjustable fastening structures on the line box lateral wall. For the round wire box, two fastening structures are arranged on the side wall of the round wire box at an interval of 180 degrees in a surrounding mode, single-hand operation is facilitated, and the two fastening structures can meet the installation requirement of wire box embedding fastening.

The line box is the bar, respectively establishes an adjustable fastening structure on the lateral wall at line box length both ends. For the strip-shaped wire box, two fastening structures are respectively arranged at two ends of the length direction of the wire box so as to meet the installation requirement of embedding and fastening the wire box in the shape.

The utility model discloses encircle on the box lateral wall and set up many adjustable fastening structure, utilize the location portion on the hasp in the fastening structure and the convex shoulder on the line box cooperation to press from both sides tight table, make the line box fasten on the table and do not rock while imbedding the table, ensure that line box work is got electricity and is connected normal use such as threading, the tightness of line box installation does not rely on the trompil precision, the hasp in the fastening structure can reciprocate the change position according to table thickness during operation, adjust to the required clamping interval of suitable height adaptation table thickness; when the fastening structure works, the lock catch can move upwards in a one-way free mode, the moving-up operation is fast and convenient, and the unlocking and dismounting are also convenient and fast.

Drawings

FIG. 1: example 1 schematic structural outline.

FIG. 2: example 1 structural exploded view.

FIG. 3: example 1 top view.

FIG. 4: the front view of the fastener.

FIG. 5: the front side of the locking fastener is a three-dimensional schematic view.

FIG. 6: the back of the locking fastener is a perspective view.

FIG. 7: example 1 cross-section (one side of the latch is removed).

FIG. 8: example 2 structural explosion diagram.

In the figure: 1. the novel wire box comprises a wire box body, 1-1 parts of an upper box body, 1-11 parts of a shoulder, 1-2 parts of a lower box body, 1-21 parts of a vertical guide groove, 2 parts of a locking groove, 2-1 parts of a clamping groove, 2-2 parts of a tooth groove, 3 parts of a lock catch, 3-1 parts of an unlocking switch, 3-2 parts of a positioning part, 3-3 parts of a fastener, 3-31 parts of a left frame, 3-32 parts of a right frame, 3-33 parts of an upper frame, 3-34 parts of a lower frame, 3-35 parts of a connecting column, 3-4 parts of an elastic plate, 3-41 parts of a vertical plate, 3-42 parts of an inclined plate, 3-43 parts of a reinforcing rib and 3-5 parts of self-locking teeth.

Detailed Description

The present invention will be further described with reference to the following description and embodiments in conjunction with the accompanying drawings.

Embodiment 1 as shown in fig. 1-7, an embedded desktop wire box with an adjustable fastening structure comprises a round wire box 1 capable of being embedded and installed, wherein the periphery of the top of the wire box 1 extends out of the side wall of the wire box 1 to form a convex shoulder 1-11, two adjustable fastening structures are arranged on the side wall of the wire box 1 at intervals of 180 degrees in a surrounding manner, each fastening structure comprises a locking groove 2 arranged on the surface of the side wall of the wire box 1 and a lock catch 3 capable of moving up and down along the locking groove 2 and locking, an unlocking switch 3-1 for unlocking and a positioning part 3-2 capable of abutting against a desk plate are respectively arranged on the side surface of the lock catch 3 and the top of the lock catch 3, the lock catch 3 can be unlocked by pressing the unlocking switch 3-1, the positioning part 3-2 can be matched with the convex shoulder to clamp the desk plate to fasten the wire box 1, and an opening is formed at the bottom end of the locking groove 2 to form an installation inlet of the lock catch 3. As shown in fig. 2, the locking groove 2 comprises a vertically extending locking groove 2-1 arranged on the surface of the side wall of the wire box 1 and a vertically continuous tooth groove 2-2 arranged on the inner side of the locking groove 2-1, and the lower end of the locking groove 2-1 is opened to form an installation inlet of the lock catch 3; as shown in fig. 4-6, the latch 3 includes a fastener 3-3 capable of being connected with the slot 2-1 and an elastic plate 3-4 of the middle-section connecting fastener 3-3, the elastic plate 3-4 can swing elastically around the end of the middle-section connecting fastener 3-3, one end of the elastic plate 3-4 elastically approaches the tooth socket 2-2 and is provided with two self-locking teeth 3-5 capable of being engaged with the tooth socket 2-2 to lock the latch 3, the number of the self-locking teeth can be three or four, a bulge is arranged at the other end of the elastic plate 3-4 and extends out of the slot 2-1 to form an unlocking switch 3-1, the end of the elastic plate 3-4 at one side of the self-locking teeth 3-5 can be tilted by pressing the unlocking switch 3-1, the self-locking teeth 3-5 exit from the tooth socket 2-2 to unlock the latch 3, and the upper portion of the fastener 3-3 extends out of the slot 2-1 to form a positioning portion 3-2. As shown in a circle A in fig. 7, the two self-locking teeth 3-5 horizontally and transversely extend and are parallel up and down, the upper side surfaces of the self-locking teeth 3-5 and the upper side walls of the corresponding tooth grooves 2-2 are inclined planes, when the unlocking switch 3-1 is pushed up, the upper side surfaces of the self-locking teeth 3-5 slide upwards along the upper side walls of the tooth grooves 2-2 in an inclined manner, so that the self-locking teeth 3-5 are withdrawn from the tooth grooves 2-2, and the end parts of the elastic plates 3-4 where the self-locking teeth 3-5 are located are elastically tilted; the lower side surface of the self-locking tooth 3-5 and the corresponding lower side wall of the tooth socket 2-2 are horizontal planes, and the lower side surface of the self-locking tooth 3-5 is propped against the lower side wall of the pressing tooth socket 2-2 downwards when the self-locking tooth 3-5 is meshed with the tooth socket 2-2 for locking.

As shown in fig. 4 to 6, the fastener 3-3 is a frame structure, the frame includes a left frame 3-31 and a right frame 3-32 which are matched with two sides of the card slot 2-1, and an upper frame 3-33 and a lower frame 3-34 which connect the left frame 3-31 and the right frame 3-32, two ends of the upper frame 3-33 are respectively connected with top ends of the left frame 3-31 and the right frame 3-32, two ends of the lower frame 3-34 are respectively connected with bottom ends of the left frame 3-31 and the right frame 3-32, the positioning portion 3-2 is located on an extension section of the upper frame 3-33, the elastic plate 3-4 is arranged in a space formed by the upper frame 3-33, the lower frame 3-34, the left frame 3-31 and the right frame 3-32, and two sides of a middle section of the elastic plate 3-4 are connected with the left frame 3-31 and the right frame 3-32 through two connecting columns 3-35. The upper end of the elastic plate 3-4 is provided with a self-locking tooth 3-5, and the lower end is provided with an unlocking switch 3-1; the elastic plate 3-4 is formed by integrally connecting a vertical plate 3-41 at the upper part and an inclined plate 3-42 which extends outwards and downwards in an inclined way at the lower part, an included angle between the vertical plate 3-41 and the inclined plate 3-42 is an obtuse angle, the end part of the vertical plate 3-41 elastically approaches to a tooth socket 2-2, a self-locking tooth 3-5 is arranged at the end part of the vertical plate 3-41, an unlocking switch 3-1 is a bulge extending outwards from the end part of the inclined plate 3-42, a reinforcing rib 3-43 is connected between the end part of the vertical plate 3-41 and the bulge, and the fastener and the elastic plate are an integral injection molding component in the embodiment.

The circular wire box 1 in the embodiment is formed by splicing an upper box 1-1 and a lower box 1-2, the periphery of the top of the upper box 1-1 extends out of the side wall of the wire box 1 to form a convex shoulder 1-11, a clamping groove 2-1 is arranged on the side wall of the upper box 1-1, the side wall of the lower box 1-2 is also provided with a vertical guide groove 1-21 matched with a fastener 3-3, the cross section of the vertical guide groove 1-21 is U-shaped, the upper end of the vertical guide groove 1-21 is butted with an opening at the lower end of the clamping groove 2-1, the lower end of the vertical guide groove 1-21 extends to the bottom surface of the lower box 1-2 to form a notch, and a lock catch 3 can be placed in the notch and can slide into the clamping groove 2-1 along the vertical guide groove 1-21.

The utility model discloses encircle on the lateral wall of line box and set up two adjustable fastening structure, utilize the tight table of locating part on the hasp among the fastening structure and the convex shoulder cooperation on the line box, the line box fastens not rocking on the table in embedding table, ensures that line box work is got electricity and is connected normal use such as threading, and the tightness of line box installation does not rely on the trompil precision, and the hasp can be according to the nimble change position that removes of table thickness, and the hasp is adjusted to suitable high just can the tight table of adaptation clamp.

When the locking device is used, a round wire box is embedded into a mounting hole pre-opened on a table plate, then two lock catches are arranged in a lock groove from the lower side of the table plate, each lock catch can be placed into a vertical guide groove from a notch on the bottom surface of a lower box, two fingers synchronously push up an unlocking switch protruding from the two lock catches, so that the lock catches slide from the vertical guide grooves into the lock groove, then the lock catches are matched with inclined surfaces of tooth grooves, in the process of moving up the lock catches, the self-locking teeth are continuously and repeatedly clamped into the tooth grooves and then withdrawn from the tooth grooves, the lock catches are repeatedly moved up freely along the lock groove by repeating the actions, in the process, the end parts of an elastic plate, namely the end parts of a vertical plate, corresponding to the self-locking teeth swing back and forth repeatedly until the lock catches abut against the bottom surface of the table plate at a proper height, the unlocking switches are loosened by the fingers, the elastic plate swings to return, the self-locking teeth elastically tend to the tooth grooves along with the end parts of the vertical plate, the two self-locking teeth are clamped into two adjacent tooth grooves, the plane on one side of each self-locking tooth is abutted against the lower side wall of the adjacent tooth grooves, the lock catch is positioned in the lock groove, the lock catch, and fastened with a convex shoulder fastened on the table plate, and fastened to clamp the table plate, and fastened on the table plate.

When the downward moving lock catch needs to be unlocked, the unlocking switch is pressed by two fingers and pushed downwards at the same time, the unlocking switch is pressed to enable the whole elastic plate to swing around the middle section connecting end, the end part of the vertical plate on the upper portion of the elastic plate tilts and moves outwards, the self-locking tooth tilts along with the end part of the vertical plate and exits from the tooth groove, and the lock catch is unlocked and can freely move downwards.

In addition, the shape of the line box can also be a strip shape as shown in an embodiment 2 shown in fig. 8, the side walls at two ends of the line box in the length direction are respectively provided with an adjustable fastening structure, the fastening structure also comprises a locking groove 2 arranged on the side wall of the line box and a lock catch 3 which can be arranged in the locking groove to move up and down and lock the position, the side surface and the top of the lock catch are respectively provided with an unlocking switch and a positioning part which can be abutted against a desk plate, the concrete structures of the rest parts including the splicing structure of the upper box body and the lower box body and the fastening structure are the same as the embodiment 1, and the use method for fastening and installing the strip line box is also the same as the embodiment 1.

Claims

1. The utility model provides a take embedded desktop line box of adjustable fastening structure, includes line box (1) that can imbed the installation, line box (1) top periphery extends line box (1) lateral wall and forms the convex shoulder, characterized by it sets up many adjustable fastening structures to surround on line box (1) lateral wall, fastening structure includes locked groove (2) that line box (1) lateral wall surface set up and can reciprocate and hasp (3) of latched position along locked groove (2), hasp (3) side and hasp (3) top are equipped with respectively unblock unlock switch (3-1) of usefulness and can support location portion (3-2) that lean on the table, and operation unlock switch (3-1) can make hasp (3) unblock, and location portion (3-2) can match with the convex shoulder and press from both sides tight table with fastening line box (1), and the opening forms hasp (3) installation entry is established to locked groove (2) bottom.

2. The embedded desktop line box with the adjustable fastening structure as claimed in claim 1, wherein the locking groove (2) comprises a vertically extending locking groove (2-1) formed on the surface of the side wall of the line box (1) and a vertically continuous tooth groove (2-2) formed inside the locking groove (2-1), and the lower opening of the locking groove (2-1) forms the installation entrance of the lock catch (3); the lock catch (3) comprises a fastener (3-3) capable of being clamped with the clamping groove (2-1) and an elastic plate (3-4) of the middle-section connecting fastener (3-3), the elastic plate (3-4) can elastically swing around the end of the middle-section connecting fastener (3-3), one end of the elastic plate (3-4) elastically tends to the tooth groove (2-2) and is provided with a self-locking tooth (3-5) capable of being meshed with the tooth groove (2-2) to lock the lock catch (3), the other end of the elastic plate (3-4) is provided with a protrusion extending out of the clamping groove (2-1) to form an unlocking switch (3-1), the end of the elastic plate (3-4) on one side of the self-locking tooth (3-5) can be tilted by pressing the unlocking switch (3-1), the self-locking tooth (3-5) exits from the tooth groove (2-2) to unlock the lock catch (3), and the clamping groove (2-1) extends out of the upper part of the fastener (3-3) to form a positioning part (3-2).

3. The embedded desktop line box with the adjustable fastening structure as claimed in claim 2, wherein the self-locking teeth (3-5) horizontally and transversely extend, the upper side surfaces of the self-locking teeth (3-5) and the corresponding upper side walls of the tooth sockets (2-2) are inclined planes, when the unlocking switch (3-1) is pushed up, the upper side surfaces of the self-locking teeth (3-5) slide obliquely and upwardly along the upper side walls of the tooth sockets (2-2), so that the self-locking teeth (3-5) exit from the tooth sockets (2-2), and the end portions of the elastic plates (3-4) where the self-locking teeth (3-5) are located elastically tilt; the lower side surfaces of the self-locking teeth (3-5) and the corresponding lower side walls of the tooth sockets (2-2) are horizontal planes, and the lower side surfaces of the self-locking teeth (3-5) are propped against the lower side walls of the pressing tooth sockets (2-2) downwards when the self-locking teeth (3-5) are meshed and locked with the tooth sockets (2-2).

4. The embedded desktop line box with the adjustable fastening structure as claimed in claim 2, wherein the fastener (3-3) is a frame comprising left and right frames (3-31, 3-32) matching with both sides of the slot (2-1) and an upper frame (3-33) connecting the left and right frames, both ends of the upper frame (3-33) are respectively connected with the top ends of the left and right frames (3-31, 3-32), and the positioning part (3-2) is located on the extension section of the upper frame (3-33); the elastic plate (3-4) is vertically arranged in a space surrounded by the left and right frames (3-31, 3-32) and the upper frame (3-33), two sides of the middle section of the elastic plate (3-4) are connected with the left and right frames (3-31, 3-32) through two connecting columns (3-35), one of the upper end and the lower end of the elastic plate (3-4) is provided with a self-locking tooth (3-5), and the other end is provided with an unlocking switch (3-1).

5. The embedded desktop line box with adjustable fastening structure as claimed in claim 4, wherein the elastic plate (3-4) has self-locking teeth (3-5) at its upper end and an unlocking switch (3-1) at its lower end.

6. The embedded desktop line box with the adjustable fastening structure as claimed in claim 4, wherein a lower frame (3-34) is connected between the bottom ends of the left frame (3-31) and the right frame (3-32), and the elastic plate (3-4) is arranged in a space formed by the upper frame (3-33), the lower frame (3-34) and the left frame (3-31, 3-32) and the right frame (3-31, 3-32).

7. The embedded desktop line box with the adjustable fastening structure as claimed in claim 5, wherein the elastic plate (3-4) is formed by integrally connecting a vertical plate (3-41) at the top and an inclined plate (3-42) at the bottom which extends outwards and obliquely downwards, an included angle between the vertical plate (3-41) and the inclined plate (3-42) is an obtuse angle, the end part of the vertical plate (3-41) elastically approaches to the tooth socket (2-2) and the self-locking teeth (3-5) are arranged at the end part of the vertical plate (3-41), the unlocking switch (3-1) is a protrusion extending outwards from the end part of the inclined plate (3-42), and a reinforcing rib (3-43) is connected between the end part of the vertical plate (3-41) and the protrusion.

8. The embedded desktop line box with the adjustable fastening structure according to claim 2, wherein the line box (1) is formed by splicing an upper box (1-1) and a lower box (1-2), the clamping groove (2-1) is formed in the side wall of the upper box (1-1), the side wall of the lower box (1-2) is provided with a vertical guide groove (1-21) matched with the fastener (3-3), the section of the vertical guide groove (1-21) is U-shaped, the upper end of the vertical guide groove (1-21) is butted with the opening at the lower end of the clamping groove (2-1), the lower end of the vertical guide groove (1-21) extends to the bottom surface of the lower box (1-2) to form a notch, and the lock catch (3) can be placed in from the notch and can slide into the clamping groove (2-1) along the vertical guide groove (1-21).

9. The embedded desktop thread cassette with adjustable fastening structure as claimed in any one of claims 1 to 8, wherein the thread cassette (1) is circular, and two adjustable fastening structures are provided around the sidewall of the thread cassette (1) with an interval of 180 °.

10. The embedded desktop line box with adjustable fastening structure as claimed in any one of claims 1 to 8, wherein the line box (1) is in a strip shape, and the adjustable fastening structure is respectively arranged on the side walls at both ends of the length of the line box (1).