阅读说明：本技术 一种用于计算机软件保护的加密装置 (Encryption device for protecting computer software ) 是由 龚健虎 于 2021-07-27 设计创作，主要内容包括：本发明公开一种用于计算机软件保护的加密装置,涉及计算机领域。该用于计算机软件保护的加密装置,包括：保护座,所述保护座的内壁上固定连接有PCB板,所述PCB板的一侧固定连接有USB接口,所述USB接口与保护座侧壁的开口处相贴合,所述保护座的内底壁的四角处均开设有插槽,所述保护座底壁的内部开设有一个纵向槽和两个横向槽,且四个插槽、两个横向槽和一个纵向槽的相连通。该用于计算机软件保护的加密装置,通过设置的限位组件,向上拉动盖板,使得四个插条完全从四个插槽中脱离,然后取下与PCB板相贴合的螺母,即可将PCB板和USB接口取出进行维修,简单方便不会对PCB板造成二次伤害,且不会对保护座和盖板造成损坏。(The invention discloses an encryption device for protecting computer software, and relates to the field of computers. The encryption device for protecting computer software comprises: the protection seat, fixedly connected with PCB board on the inner wall of protection seat, one side fixedly connected with USB interface of PCB board, the USB interface is laminated with the opening part of protection seat lateral wall mutually, the slot has all been seted up to the four corners department of the interior diapire of protection seat, a vertical groove and two transverse grooves have been seted up to the inside of protection seat diapire, and being linked together of four slots, two transverse grooves and a vertical groove. This an encryption device for computer software protection through the spacing subassembly that sets up, upwards stimulates the apron for four cuttings break away from completely from four slots, then take off the nut of laminating mutually with the PCB board, can take out PCB board and USB interface and maintain, and simple and convenient can not cause the secondary injury to the PCB board, and can not cause the damage to protection seat and apron.)

1. An encryption apparatus for computer software protection, comprising:

the protection seat comprises a protection seat (1), wherein a PCB (101) is fixedly connected to the inner wall of the protection seat (1), a USB interface (102) is fixedly connected to one side of the PCB (101), the USB interface (102) is attached to an opening of the side wall of the protection seat (1), slots (103) are formed in four corners of the inner bottom wall of the protection seat (1), a longitudinal groove (104) and two transverse grooves (105) are formed in the inner portion of the bottom wall of the protection seat (1), and the four slots (103), the two transverse grooves (105) and the longitudinal groove (104) are communicated;

the lower surface of the cover plate (2) is fixedly connected with a sealing plate (201) and four inserting strips (202), the sealing plate (201) is attached to an opening of the side wall of the protection seat (1) and attached to the upper surface of the USB interface (102), and the four inserting strips (202) are respectively inserted into the four slots (103) and are provided with limiting assemblies;

protective sheath (3), protective sheath (3) cup joint the surface at USB interface (102), the last fixed surface of protective sheath (3) is connected with fixed strip (301), fixed strip (301) pass closing plate (201) and extend towards the inside of protection seat (1), and are equipped with fixed subassembly.

2. An encryption apparatus for computer software protection according to claim 1, characterized in that: four threaded rods are fixedly connected to the inner wall of the protection seat (1), four semicircular holes are formed in the PCB (101), the threaded rods are attached to the inner wall of the semicircular holes, nuts are connected to the outer surfaces of the threaded rods in a threaded mode, and the lower surfaces of the nuts are attached to the PCB (101).

3. An encryption apparatus for computer software protection according to claim 1, characterized in that: the limiting assembly comprises a moving strip (4), the moving strip (4) is connected to the inner wall of a longitudinal groove (104) in a sliding mode, squeezing blocks (401) are fixedly connected to the two ends of the moving strip (4), the two sides of the squeezing blocks (401) are obliquely arranged, a first moving block (402), a second moving block (403), a first sliding strip (404) and a second sliding strip (405) are connected to the inner wall of a transverse groove (105) in a sliding mode, the first moving block (402) and the second moving block (403) are attached to the two sides of the squeezing blocks (401) respectively, and one side, opposite to the other side, of the first moving block (402) and the other side, of the second moving block (403) are fixedly connected with the first sliding strip (404) and the second sliding strip (405) respectively.

4. An encryption apparatus for computer software protection according to claim 3, characterized in that: the front surface of the extrusion block (401) positioned on the front surface is fixedly connected with a fixing rod (406), and one end, far away from the extrusion block (401), of the fixing rod (406) is movably inserted in the front surface of the protection seat (1).

5. An encryption apparatus for computer software protection according to claim 3, characterized in that: spacing subassembly still includes spacing spring (5) and extrusion spring (502), the holding tank has been seted up to the lateral wall of the bottom of cutting (202), the one end fixed connection of spacing spring (5) is on the inner wall of holding tank, the other end fixedly connected with stopper (501) of spacing spring (5), stopper (501) sliding connection is on the inner wall of holding tank, the lower surface slope of stopper (501) sets up, and the lateral wall of four stoppers (501) is laminated with the tip of two first draw runner (404) and the tip of two second draw runners (405) respectively mutually.

6. An encryption apparatus for computer software protection according to claim 5, wherein: the push spring (502) is fixedly connected to the bottom wall of the slot (103), the top of the push spring (502) is fixedly connected with a positioning block (503), the upper surface of the positioning block (503) is abutted to the bottom of the insertion strip (202), and the push spring (502) is in a compressed state.

7. An encryption apparatus for computer software protection according to claim 1, characterized in that: the fixed subassembly includes fixed slot (6), the inside at apron (2) is seted up in fixed slot (6), sliding connection has sliding plate (601) on the inner wall of fixed slot (6), the fixed grafting in inside of sliding plate (601) has action bars (602), the diapire downwardly extending of apron (2) is passed to the bottom of action bars (602) to fixed frame (603) of fixedly connected with.

8. An encryption apparatus for computer software protection according to claim 7, wherein: the tip that fixed strip (301) are in the inside of protection seat (1) is laminated with the inner wall of fixed frame (603) mutually, just draw-in groove (604) have been seted up to the lower surface of fixed strip (301), just the inner wall of draw-in groove (604) is laminated with fixed frame (603) bottom.

9. An encryption apparatus for computer software protection according to claim 7, wherein: the outer surface activity of action bars (602) is cup jointed fixed spring (605), fixed spring (605)'s both ends respectively fixed connection at the interior diapire of fixed slot (6) and the lower surface of sliding plate (601), the top of action bars (602) passes the roof of apron (2) and upwards extends and fixedly connected with button (606).

Technical Field

The invention relates to the technical field of computers, in particular to an encryption device for protecting computer software.

Background

Computer software encryption is usually encrypted and protected by a dongle, the dongle is a software encryption product combining software and hardware inserted into a parallel port of a computer, a hardware encryption lock and FreeEIM are commonly called as 'dongle', the dongle generally has a non-volatile storage space of dozens or hundreds of bytes for reading and writing, a single chip microcomputer is also included in a new product, and the dongle is adopted by software developers.

Similar USB flash disk of dongle, by the shell, PCB board and USB socket constitute, when PCB board and USB socket because of the collision, high temperature, when the scheduling problem that intakes takes place to damage, generally be fixed connection because of the shell, need pry the shell then maintain, it is comparatively loaded down with trivial details to pry the shell on the one hand, and cause PCB board and USB socket's secondary injury easily, on the other hand shell generally all can be damaged, can't continue to use, need the installation to fix in new shell, it is comparatively loaded down with trivial details, therefore we have proposed an encryption device for computer software protection.

Disclosure of Invention

Technical problem to be solved

In view of the deficiencies of the prior art, the present invention discloses an encryption device for protecting computer software, so as to solve the problems presented in the background art.

(II) technical scheme

In order to achieve the purpose, the invention is realized by the following technical scheme: an encryption apparatus for computer software protection, comprising:

the protection seat is characterized in that a PCB is fixedly connected to the inner wall of the protection seat, a USB interface is fixedly connected to one side of the PCB, the USB interface is attached to an opening of the side wall of the protection seat, slots are formed in four corners of the inner bottom wall of the protection seat, a longitudinal groove and two transverse grooves are formed in the inner portion of the bottom wall of the protection seat, and the four slots, the two transverse grooves and the longitudinal groove are communicated;

the lower surface of the cover plate is fixedly connected with a sealing plate and four inserting strips, the sealing plate is attached to an opening of the side wall of the protective seat and attached to the upper surface of the USB interface, and the four inserting strips are respectively inserted into the four inserting grooves and are provided with limiting assemblies;

the protective sheath, the protective sheath cup joints the surface at the USB interface, the last fixed surface of protective sheath is connected with the fixed strip, the fixed strip passes the closing plate and extends towards the inside of protection seat, and is equipped with fixed subassembly.

Preferably, four threaded rods are fixedly connected to the inner wall of the protection seat, four semicircular holes are formed in the PCB, the threaded rods are attached to the inner wall of the semicircular holes, nuts are connected to the outer surfaces of the threaded rods in a threaded mode, and the lower surfaces of the nuts are attached to the PCB.

Preferably, the limiting assembly comprises a moving strip, the moving strip is connected to the inner wall of the longitudinal groove in a sliding mode, the two ends of the moving strip are fixedly connected with extrusion blocks, the two sides of each extrusion block are inclined, the inner wall of the transverse groove is connected with a first moving block, a second moving block, a first sliding strip and a second sliding strip in a sliding mode, the first moving block and the second moving block are attached to the two sides of each extrusion block respectively, and one side, back to back, of the first moving block and the second moving block is fixedly connected with the first sliding strip and the second sliding strip respectively.

Preferably, the front surface of the front extrusion block is fixedly connected with a fixing rod, and one end of the fixing rod, which is far away from the extrusion block, is movably inserted in the front surface of the protection seat.

Preferably, spacing subassembly still includes spacing spring and extrusion spring, the holding tank has been seted up to the lateral wall of the bottom of cutting, the one end fixed connection of spacing spring is on the inner wall of holding tank, the other end fixedly connected with stopper of spacing spring, stopper sliding connection is on the inner wall of holding tank, the lower surface slope of stopper sets up, and the lateral wall of four stoppers is laminated with the tip of two first draw slips and the tip of two second draw slips respectively mutually.

Preferably, the extrusion spring is fixedly connected to the bottom wall of the slot, a positioning block is fixedly connected to the top of the extrusion spring, the upper surface of the positioning block abuts against the bottom of the insertion strip, and the extrusion spring is in a compression state.

Preferably, the fixed subassembly includes the fixed slot, the fixed slot is seted up in the inside of apron, sliding connection has the sliding plate on the inner wall of fixed slot, the fixed grafting in inside of sliding plate has the action bars, the diapire downwardly extending that the apron was passed to the bottom of action bars to the fixed frame of fixedly connected with.

Preferably, the end part of the fixing strip, which is located inside the protection seat, is attached to the inner wall of the fixing frame, the lower surface of the fixing strip is provided with a clamping groove, and the inner wall of the clamping groove is attached to the bottom of the fixing frame.

Preferably, the outer surface of the operating rod is movably sleeved with a fixed spring, two ends of the fixed spring are respectively and fixedly connected to the inner bottom wall of the fixed groove and the lower surface of the sliding plate, and the top end of the operating rod penetrates through the top wall of the cover plate to extend upwards and is fixedly connected with a button.

The invention discloses an encryption device for protecting computer software, which has the following beneficial effects:

1. this an encryption device for computer software protection, spacing subassembly through setting up, upwards stimulate the apron, make four cuttings break away from completely from four slots, then take off the nut of laminating mutually with the PCB board, can take out PCB board and USB interface and maintain, simple and convenient can not cause the secondary injury to the PCB board, and can not lead to the fact the damage to protection seat and apron, after the maintenance, make the notch inner wall of stopper and transverse groove laminate mutually, and then the rigidity to the cuttings, and then the rigidity to the apron, the apron laminates mutually with the upper surface of protection seat this moment, thereby the installation of apron has been accomplished.

2. This an encryption device for computer software protection, through the fixed subassembly that sets up, when not using the device need cover the protection to the USB interface, the bottom of fixed frame plays fixed effect with draw-in groove and the protective sheath of the lower surface of fixed strip, and makes protective sheath be difficult to take place to drop at the surface of USB interface to effectual guard action has been played the USB interface.

3. This encryption device for computer software protection, through threaded rod and the nut that sets up, after the maintenance, at first place the inner wall at the protection seat with the PCB board to make the USB interface laminate mutually with the opening part of protection seat lateral wall, four threaded rods on the protection seat inner wall laminate mutually with the inner wall of the semicircle orifice of PCB board, at threaded rod surface screw in nut and make the lower surface of nut laminate mutually with the PCB board, thereby fix the position of PCB board and USB interface.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic view of the internal structure of the protection seat according to the present invention;

FIG. 3 is a schematic view of the structure of the slot, the transverse slot and the longitudinal slot of the present invention;

FIG. 4 is a top cross-sectional view of the protective housing of the present invention;

FIG. 5 is an enlarged view of portion A of FIG. 4 according to the present invention;

FIG. 6 is a side cross-sectional view of the protective housing of the present invention;

FIG. 7 is a schematic diagram of a portion of the structure of FIG. 6 in accordance with the present invention;

FIG. 8 is a schematic view of the cover plate according to the present invention;

FIG. 9 is a side cross-sectional view of a protective sleeve and cover of the present invention;

FIG. 10 is an enlarged view of portion B of FIG. 9 in accordance with the present invention;

fig. 11 is a schematic structural view of the fixing member of the present invention.

In the figure: 1. a protective seat; 101. a PCB board; 102. a USB interface; 103. a slot; 104. a longitudinal slot; 105. a transverse slot; 2. a cover plate; 201. a sealing plate; 202. cutting; 3. a protective sleeve; 301. a fixing strip; 4. a moving bar; 401. extruding the block; 402. a first moving block; 403. a second moving block; 404. a first slide bar; 405. a second slide bar; 406. fixing the rod; 5. a limiting spring; 501. a limiting block; 502. a compression spring; 503. positioning blocks; 6. fixing grooves; 601. a sliding plate; 602. an operating lever; 603. a fixing frame; 604. a card slot; 605. fixing the spring; 606. a button.

Detailed Description

The first embodiment is as follows:

the embodiment of the invention discloses an encryption device for protecting computer software,

referring to fig. 1-3, comprising:

the protection seat 1 is characterized in that a PCB 101 is fixedly connected to the inner wall of the protection seat 1, a USB interface 102 is fixedly connected to one side of the PCB 101, the USB interface 102 is attached to an opening of the side wall of the protection seat 1, slots 103 are formed in four corners of the inner bottom wall of the protection seat 1, a longitudinal groove 104 and two transverse grooves 105 are formed in the bottom wall of the protection seat 1, and the four slots 103, the two transverse grooves 105 and the longitudinal groove 104 are communicated;

the cover plate 2 is connected with a sealing plate 201 and four inserting strips 202 fixedly on the lower surface of the cover plate 2, the sealing plate 201 is attached to an opening of the side wall of the protection seat 1 and is attached to the upper surface of the USB interface 102, the four inserting strips 202 are respectively inserted into the four slots 103 and are provided with limiting components, the cover plate 2 is pulled upwards through the arranged limiting components, so that the four inserting strips 202 are completely separated from the four slots 103, then nuts attached to the PCB 101 are taken down, the PCB 101 and the USB interface 102 can be taken out for maintenance, secondary damage to the PCB 101 can be avoided simply and conveniently, and the protection seat 1 and the cover plate 2 can not be damaged;

protective sheath 3, protective sheath 3 cup joint at the surface of USB interface 102, and the last fixed surface of protective sheath 3 is connected with fixed strip 301, and fixed strip 301 passes the closing plate 201 and extends towards the inside of protection seat 1, and is equipped with fixed subassembly.

Referring to fig. 1, four threaded rods are fixedly connected to the inner wall of the protection seat 1, four semicircular holes are formed in the PCB 101, the threaded rods are attached to the inner wall of the semicircular holes, nuts are connected to the outer surface of the threaded rods in a threaded manner, the lower surface of each nut is attached to the PCB 101, the four threaded rods on the inner wall of the protection seat 1 are attached to the inner wall of the semicircular holes of the PCB 101 through the arranged threaded rods and the arranged nuts, the nuts are screwed into the outer surfaces of the threaded rods, the lower surfaces of the nuts are attached to the PCB 101, and accordingly the positions of the PCB 101 and the USB interface 102 are fixed.

Referring to fig. 3-5, the limiting assembly includes a moving bar 4, the moving bar 4 is slidably connected to an inner wall of the longitudinal groove 104, two ends of the moving bar 4 are fixedly connected with extrusion blocks 401, two sides of the extrusion blocks 401 are obliquely arranged, an inner wall of the transverse groove 105 is slidably connected with a first moving block 402, a second moving block 403, a first sliding bar 404 and a second sliding bar 405, the first moving block 402 and the second moving block 403 are respectively attached to two sides of the extrusion blocks 401, and one side of the first moving block 402, opposite to the second moving block 403, is fixedly connected with the first sliding bar 404 and the second sliding bar 405 respectively.

Referring to fig. 5, a fixing rod 406 is fixedly connected to the front surface of the front extrusion block 401, one end of the fixing rod 406, which is far away from the extrusion block 401, is movably inserted into the front surface of the protection seat 1, and by providing the fixing rod 406, the fixing rod 406 is pressed by using a detection pin (similar to a latch pin of a mobile phone, not shown in the figure), so that the fixing rod 406 is pushed to move towards the inside of the protection seat 1, thereby facilitating to push the moving bar 4 and the two extrusion blocks 401 to slide in the longitudinal groove 104.

Referring to fig. 6-7, the limiting assembly further includes a limiting spring 5 and an extrusion spring 502, the accommodating groove is formed in the side wall of the bottom of the inserting strip 202, one end of the limiting spring 5 is fixedly connected to the inner wall of the accommodating groove, the other end of the limiting spring 5 is fixedly connected with a limiting block 501, the limiting block 501 is slidably connected to the inner wall of the accommodating groove, the lower surface of the limiting block 501 is inclined, the side walls of the four limiting blocks 501 are respectively attached to the end portions of the two first sliding strips 404 and the end portions of the two second sliding strips 405, the lower surface of the limiting block 501 is inclined, and when the inclined surface of the limiting block 501 contacts with the notch of the slot 103, the limiting block 501 is pushed to slide into the accommodating groove and the limiting spring 5 is compressed.

Extrusion spring 502 fixed connection is on the diapire of slot 103, extrusion spring 502's top fixedly connected with locating piece 503, the upper surface of locating piece 503 offsets with the bottom of cutting 202, and extrusion spring 502 is in compression state, through the locating piece 503 that sets up, when locating piece 503 rebound, has promoted four cutting 202 and has upwards slided respectively in four slots 103, and because of locating piece 503 rebound and first draw runner 404 and the contact of second draw runner 405 for first draw runner 404 and second draw runner 405 can't get into in the slot 103.

The working principle is as follows: in the using process, when the PCB 101 needs to be maintained, the protective sleeve 3 is taken down, and then the fixing rod 406 is pressed by a detection needle (similar to a card needle of a mobile phone, not shown in the figure), so that the fixing rod 406 is pushed to move towards the inside of the protective base 1, the moving strip 4 and the two squeezing blocks 401 are pushed to slide in the longitudinal groove 104, and the inclined surfaces on the two sides of the squeezing blocks 401 are respectively attached to the first moving block 402 and the second moving block 403, so that the first moving block 402 and the second moving block 403 are pushed to slide in the lateral groove 105 in the opposite direction, and the first sliding strip 404 and the second sliding strip 405 slide in the opposite direction;

because the side walls of the four limit blocks 501 are respectively attached to the end parts of the two first sliding strips 404 and the end parts of the two second sliding strips 405, the four limit blocks 501 are extruded to respectively slide towards the four accommodating grooves, and the four limit springs 5 are compressed until the four limit blocks 501 completely enter the four accommodating grooves, at this time, the compression springs 502 in a compression state rebound to push the positioning blocks 503 to move upwards and push the four inserting strips 202 to respectively slide upwards in the four slots 103, and the positioning blocks 503 move upwards to be in contact with the first sliding strips 404 and the second sliding strips 405, so that the first sliding strips 404 and the second sliding strips 405 cannot enter the slots 103;

at the moment, the cover plate 2 can be pulled upwards to enable the four inserting strips 202 to be completely separated from the four inserting slots 103, then the nuts attached to the PCB 101 are taken down, the PCB 101 and the USB interface 102 can be taken out for maintenance, the secondary damage to the PCB 101 is avoided simply and conveniently, and the protection seat 1 and the cover plate 2 are not damaged;

after maintenance is finished, firstly, the PCB 101 is placed on the inner wall of the protection seat 1, the USB interface 102 is attached to an opening of the side wall of the protection seat 1, four threaded rods on the inner wall of the protection seat 1 are attached to the inner wall of a semicircular hole of the PCB 101, nuts are screwed into the outer surfaces of the threaded rods, the lower surfaces of the nuts are attached to the PCB 101, and therefore the positions of the PCB 101 and the USB interface 102 are fixed;

then insert four bottom of cutting 202 respectively in four slots 103, because of the lower surface slope setting of stopper 501, when the inclined plane of stopper 501 contacted with the notch of slot 103, it slides into the holding tank to have promoted stopper 501, and compressed spacing spring 5, until the bottom of cutting 202 and locating piece 503 contact and promoted locating piece 503 lapse, compressed extrusion spring 502, and stopper 501 slides to the notch department of transverse groove 105, spacing spring 5 rebounds and has promoted stopper 501 and slide into transverse groove 105, from making stopper 501 and the notch inner wall of transverse groove 105 laminate mutually, and then to the rigidity of cutting 202, and then to the rigidity of apron 2, apron 2 was laminated with the upper surface of protection seat 1 this moment, thereby the installation of apron 2 has been accomplished.

Example two:

the embodiment of the invention discloses an encryption device for protecting computer software,

referring to fig. 1-3, comprising:

the protection seat 1 is characterized in that a PCB 101 is fixedly connected to the inner wall of the protection seat 1, a USB interface 102 is fixedly connected to one side of the PCB 101, the USB interface 102 is attached to an opening of the side wall of the protection seat 1, slots 103 are formed in four corners of the inner bottom wall of the protection seat 1, a longitudinal groove 104 and two transverse grooves 105 are formed in the bottom wall of the protection seat 1, and the four slots 103, the two transverse grooves 105 and the longitudinal groove 104 are communicated;

a sealing plate 201 and four inserting strips 202 are fixedly connected to the lower surface of the cover plate 2, the sealing plate 201 is attached to an opening of the side wall of the protection seat 1 and attached to the upper surface of the USB interface 102, and the four inserting strips 202 are respectively inserted into the four slots 103 and are provided with limiting assemblies;

protective sheath 3, protective sheath 3 cup joints the surface at USB interface 102, the last fixed surface of protective sheath 3 is connected with fixed strip 301, fixed strip 301 passes closing plate 201 and extends towards the inside of protection seat 1, and be equipped with fixed subassembly, fixed subassembly through setting up, when not using the device needs to cover the protection to USB interface 102, the bottom of fixed frame 603 is laminated mutually with the draw-in groove 604 of the lower surface of fixed strip 301, thereby play fixed effect to fixed strip 301 and protective sheath 3, and make protective sheath 3 cover 3 be difficult to take place to drop at the surface of USB interface 102, thereby played effectual guard action to USB interface 102.

Referring to fig. 8-11, the fixing assembly includes a fixing groove 6, the fixing groove 6 is opened inside the cover plate 2, a sliding plate 601 is slidably connected to an inner wall of the fixing groove 6, an operating rod 602 is fixedly inserted into the sliding plate 601, and a bottom end of the operating rod 602 passes through a bottom wall of the cover plate 2 and extends downward, and is fixedly connected to a fixing frame 603.

The tip that the fixed strip 301 is in the inside of protection seat 1 is laminated with the inner wall of fixed frame 603 mutually, and the draw-in groove 604 has been seted up to the lower surface of fixed strip 301, and the inner wall of draw-in groove 604 is laminated with fixed frame 603 bottom mutually to play fixed effect to fixed strip 301 and protective sheath 3, and make protective sheath 3 cover be difficult to take place to drop at the surface of USB interface 102, thereby played effectual guard action to USB interface 102.

Fixed spring 605 has been cup jointed in the surface activity of action bars 602, fixed spring 605's both ends difference fixed connection is at the interior diapire of fixed slot 6 and the lower surface of sliding plate 601, the roof that apron 2 was passed on the top of action bars 602 upwards extends and fixedly connected with button 606, button 606 through setting up, thereby be convenient for press action bars 602 downwards, and through the fixed spring 605 that sets up, loosen behind the button 606, fixed spring 605 rebounds, sliding plate 601 and action bars 602 lapse have been driven, and then make fixed frame 603 rebound, the bottom of fixed frame 603 is laminated mutually with the draw-in groove 604 of the lower surface of fixed frame 301, thereby play fixed effect to fixed strip 301 and protective sheath 3, and make protective sheath 3 cover be difficult for taking place to drop at the surface of USB interface 102.

The working principle is as follows: when the protective sleeve 3 needs to be taken down by using the device, the button 606 is pressed downwards, the operating rod 602 is driven to slide downwards, the sliding plate 601 is driven to slide downwards in the fixing groove 6, the fixing spring 605 is compressed, the fixing frame 603 moves downwards, the bottom of the fixing frame 603 is separated from the clamping groove 604 on the lower surface of the fixing strip 301, at the moment, the protective sleeve 3 can be pulled outwards, the fixing strip 301 is separated from the fixing frame 603, and the protective sleeve 3 is separated from the USB interface 102 until the USB interface 102 is separated, and at the moment, the USB interface 102 can be inserted into a computer for use;

when the USB interface 102 needs to be covered and protected without using a device, the button 606 is pressed downwards again, the fixing spring 605 is compressed, the fixing frame 603 moves downwards, the protective sleeve 3 is sleeved on the USB interface 102 at the moment, the end part of the fixing strip 301 penetrates through the sealing plate 201 and is inserted into the fixing frame 603, the button 606 is loosened at the moment, the fixing spring 605 rebounds, the sliding plate 601 and the operating rod 602 are driven to slide upwards, the fixing frame 603 moves upwards, the bottom of the fixing frame 603 is attached to the clamping groove 604 of the lower surface of the fixing strip 301, the fixing strip 301 and the protective sleeve 3 are fixed, the protective sleeve 3 is not prone to falling off on the outer surface of the USB interface 102, and the USB interface 102 is effectively protected.

In summary, the following steps: in the using process, when the PCB 101 needs to be maintained, the button 606 is pressed downwards to drive the operating rod 602 to slide downwards, and the sliding plate 601 is driven to slide downwards in the fixing groove 6, so that the fixing spring 605 is compressed, the fixing frame 603 moves downwards, the bottom of the fixing frame 603 is separated from the clamping groove 604 on the lower surface of the fixing strip 301, and at this time, the protective sleeve 3 can be pulled outwards to separate the fixing strip 301 from the fixing frame 603 until the protective sleeve 3 is separated from the USB interface 102;

then, the fixed rod 406 is pressed through a detection pin (similar to a card pin of a mobile phone, which is not shown in the figure), so that the fixed rod 406 is pushed to move towards the inside of the protection base 1, and thus the movable bar 4 and the two extrusion blocks 401 are pushed to slide in the longitudinal groove 104, and as the inclined surfaces on the two sides of the extrusion blocks 401 are respectively attached to the first movable block 402 and the second movable block 403, the first movable block 402 and the second movable block 403 are pushed to slide in the opposite directions in the transverse groove 105, and further the first sliding bar 404 and the second sliding bar 405 slide in the opposite directions;

because the side walls of the four limit blocks 501 are respectively attached to the end parts of the two first sliding strips 404 and the end parts of the two second sliding strips 405, the four limit blocks 501 are extruded to respectively slide towards the four accommodating grooves, and the four limit springs 5 are compressed until the four limit blocks 501 completely enter the four accommodating grooves, at this time, the compression springs 502 in a compression state rebound to push the positioning blocks 503 to move upwards and push the four inserting strips 202 to respectively slide upwards in the four slots 103, and the positioning blocks 503 move upwards to be in contact with the first sliding strips 404 and the second sliding strips 405, so that the first sliding strips 404 and the second sliding strips 405 cannot enter the slots 103;

at the moment, the cover plate 2 can be pulled upwards to enable the four inserting strips 202 to be completely separated from the four inserting slots 103, then the nuts attached to the PCB 101 are taken down, the PCB 101 and the USB interface 102 can be taken out for maintenance, the secondary damage to the PCB 101 is avoided simply and conveniently, and the protection seat 1 and the cover plate 2 are not damaged;

after maintenance is finished, firstly, the PCB 101 is placed on the inner wall of the protection seat 1, the USB interface 102 is attached to an opening of the side wall of the protection seat 1, four threaded rods on the inner wall of the protection seat 1 are attached to the inner wall of a semicircular hole of the PCB 101, nuts are screwed into the outer surfaces of the threaded rods, the lower surfaces of the nuts are attached to the PCB 101, and therefore the positions of the PCB 101 and the USB interface 102 are fixed;

then, the bottom ends of the four insertion bars 202 are respectively inserted into the four slots 103, because the lower surface of the limit block 501 is obliquely arranged, when the inclined surface of the limit block 501 is in contact with the notches of the slots 103, the limit block 501 is pushed to slide into the accommodating groove, the limit spring 5 is compressed until the bottom end of the insertion bar 202 is in contact with the positioning block 503 and pushes the positioning block 503 to slide downwards, the extrusion spring 502 is compressed, the limit block 501 slides to the notch of the transverse groove 105, the limit spring 5 rebounds to push the limit block 501 to slide into the transverse groove 105, so that the limit block 501 is attached to the inner wall of the notch of the transverse groove 105, the position of the insertion bar 202 is fixed, the position of the cover plate 2 is fixed, and the cover plate 2 is attached to the upper surface of the protection seat 1, and the installation of the cover plate 2 is completed;

when the USB interface 102 needs to be covered and protected without using a device, the button 606 is pressed downwards again, the fixing spring 605 is compressed, the fixing frame 603 moves downwards, the protective sleeve 3 is sleeved on the USB interface 102 at the moment, the end part of the fixing strip 301 penetrates through the sealing plate 201 and is inserted into the fixing frame 603, the button 606 is loosened at the moment, the fixing spring 605 rebounds, the sliding plate 601 and the operating rod 602 are driven to slide upwards, the fixing frame 603 moves upwards, the bottom of the fixing frame 603 is attached to the clamping groove 604 of the lower surface of the fixing strip 301, the fixing strip 301 and the protective sleeve 3 are fixed, the protective sleeve 3 is not prone to falling off on the outer surface of the USB interface 102, and the USB interface 102 is effectively protected.

The foregoing shows and describes the general principles and broad features of the present invention and advantages thereof. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.