CN110583592A

CN110583592A - Sea fishing plate

Info

Publication number: CN110583592A
Application number: CN201910980058.XA
Authority: CN
Inventors: 范家亦; 范正祥
Original assignee: Individual
Current assignee: Individual
Priority date: 2019-10-15
Filing date: 2019-10-15
Publication date: 2019-12-20
Anticipated expiration: 2039-10-15
Also published as: CN110583592B

Abstract

The invention discloses a sea fishing disc which comprises a shell main body, wherein a fixing ring is fixedly connected to the middle of the outer surface of one side of the shell main body, an L-shaped clamping groove is fixedly connected to the position, close to the upper end, of the outer surface of the other side of the shell main body, a clamping block is arranged inside the L-shaped clamping groove, a line locking shell is fixedly connected to the outer surface of one side of the clamping block, a fixing shaft is movably connected to the center position inside the shell main body, a return spring is wound on the outer surface of the fixing shaft, one end of the return spring is fixedly connected with the fixing shaft, a disc-shaped wire guide block is fixedly connected to the other end of the return spring, and the other. The invention mainly aims at a sea fishing disc, and compared with the traditional fishing rod fishing process, the structure of the device greatly optimizes the fishing process, reduces the physical strength consumption of a user, effectively reduces the probability of accidental injury of the user and increases the fishing pleasure of the user.

Description

Sea fishing plate

Technical Field

The invention relates to the technical field of sea fishing devices, in particular to a sea fishing disc.

Background

Sea fishing, according to the sea area environmental morphology of various fishes life in the ocean promptly, cooperate its life habit, the situation of dwelling and moving, season and climatic factor, seek food habit etc., adopt effectual method, traditional sea fishing mode adopts the sea fishing rod and the fishing tackle that corresponds of special material, lure fishing fish with fishing tackle and bait, because the fish in the sea is salt water fish, they are more violent than fresh water fish, pull the dynamics and compare a lot that ordinary fresh water fish is big, when the user is fishing on sea or great reservoir lake, because the weight of fish and habit, the user need constantly pull the fishing rod and receive and release the physical power that the fish line consumed the fish, this process consumes the person's of hanging, can lead to the person's of hanging wrist to exert oneself excessively even, thereby cause arm fatigue and pull injury.

Disclosure of Invention

The present invention is directed to a sea fishing reel that solves the problems set forth in the background art.

In order to achieve the purpose, the invention provides the following technical scheme: a sea fishing plate comprises a shell main body, wherein a fixing ring is fixedly connected to the middle of the outer surface of one side of the shell main body, an L-shaped clamping groove is fixedly connected to the position, close to the upper end, of the outer surface of the other side of the shell main body, a clamping block is arranged inside the L-shaped clamping groove, a wire locking shell is fixedly connected to the outer surface of one side of the clamping block, a fixing shaft is movably connected to the central position inside the shell main body, a return spring is wound on the outer surface of the fixing shaft, one end of the return spring is fixedly connected with the fixing shaft, a disc-shaped wire block is fixedly connected to the other end of the return spring, the other end of the return spring is fixedly connected to the inner surface of the disc-shaped wire block, a fishing line is arranged on the outer surface of the disc-shaped wire block and is wound on the outer, the back end outer surface of the shell main body is provided with a reverse stopping tooth close to the position of the fixed shaft, the reverse stopping tooth is fixedly connected with the fixed shaft, the back end outer surface of the shell main body is fixedly connected with a reverse stopping steel sheet close to the position of the reverse stopping tooth, the reverse stopping tooth is movably connected with the reverse stopping steel sheet, the reverse stopping tooth is movably connected with the shell main body, the center position of the back end outer surface of the reverse stopping tooth is fixedly connected with a rotating handle, the inside of the locking thread shell is fixedly connected with a thread locking platform, the upper end outer surface of the thread locking shell is penetrated with a first self-locking button, one end of the first self-locking button penetrates through the thread locking platform and extends to the lower end of the thread locking platform, the bottom end of the first self-locking button is fixedly connected with a locking hole, the outer surface of the first self-locking button is provided with a third limiting block and a third return spring, and the third, the third limiting block is fixedly connected with the first self-locking button, the third limiting block and a third reset spring are positioned on the upper side of the locking line platform, a locking line slotted hole is formed in the position, close to the locking hole, of the bottom end of the first self-locking button, a line outlet is formed in the middle of the outer surface of one side, away from the shell main body, of the locking line shell, one end of the fish line is fixedly connected with the disc-shaped conducting wire block, the other end of the fish line penetrates through the shell main body, the locking line shell and the locking line slotted hole and extends to the outer surface of the locking line shell through the line outlet, a fish line trigger rod is arranged inside the locking line shell and is arranged on the lower side of the locking line platform, a first limiting block and a first reset spring are arranged on the outer surface of the fish line trigger rod, the first reset spring is sleeved on the outer surface of the fish line trigger rod, and one end, and the other end of the fishing line trigger rod is fixedly connected with the inner surface of the locking line shell, one end of the fishing line trigger rod penetrates through and extends to the outer surface of the locking line shell, the other end of the fishing line trigger rod is fixedly connected with the locking head, the sleeve is fixedly connected with the center of the outer surface of the other side of the shell main body, a second self-locking button is arranged inside the sleeve, one end of the second self-locking button penetrates through and extends to the outer surface of the sleeve, the other end of the second self-locking button penetrates through the shell main body and extends to the inside of the toothed groove, a second reset spring and a second limiting block are arranged on the outer surface of the second self-locking button, one end of the second reset spring is fixedly connected with the second limiting.

Preferably, the number of the tooth-shaped grooves is several, and the tooth-shaped grooves are equidistantly arranged on the outer surface of the disc-shaped lead block.

Preferably, the diameters of the ends, close to the fixed shaft, of the return springs are sequentially decreased.

Preferably, a fishing line clamping groove is formed in one end, far away from the locking head, of the fishing line trigger rod, and the fishing line is clamped inside the fishing line clamping groove.

Preferably, the L-shaped clamping groove is matched with the clamping block, and the shell body is connected with the locking line shell in a split mode.

Preferably, the first self-locking button corresponds to the fishing line trigger rod in position, and the locking hole is matched with the locking head.

Preferably, the one end that the fixed axle was kept away from to the rotatory handle articulates there is the handle, and when the handle was perpendicular with the rotatory handle, the handle was the Z type structure with the rotatory handle.

Preferably, the second limiting block is movably connected with the sleeve, and the length of the second self-locking button is greater than that of the sleeve.

Preferably, the shell main part is divided into a front shell and a rear shell detachable connection structure, and screw holes are formed in corners of the front shell and the rear shell.

Compared with the prior art, the invention has the beneficial effects that: when the device is not used, the second self-locking button is in an opening and closing state with the disc-shaped lead block under the elastic expansion and contraction of the second return spring, a user holds the buoy lead block to throw the fishhook on the sea surface or lake surface when using, then presses the first self-locking button to force the first self-locking button to move downwards to pass through the third limit block to pull the third return spring, and then the fish wire in the wire locking groove hole locks the fish wire under the action of the wire locking platform and the wire locking groove hole when the first self-locking button moves downwards, then the triggering rod of the fish wire is slightly pulled to release, the locking head and the locking hole are superposed and fixed at the position of the first self-locking button, then a user turns the handle to rotate the fixed shaft through the rotating handle so as to adjust the pretightening force of the return spring, the check teeth rotate simultaneously while rotating the rotating handle until the fish wire inside the shell main body and the fish wire inside the locking wire shell are in a tight state, then the user lightly presses the second self-locking button to force one end of the second self-locking button to be inserted into the dentate groove formed on the outer edge of the disk-shaped conducting block, simultaneously the position of the second self-locking button in the dentate groove is fixed under the pretightening force of the return spring, then the handle is continuously rotated to further increase the elastic potential energy of the return spring, the check teeth are fixed at a rotation angle, then the shell main body is fixed with foreign objects through the fixing ring, and the whole fishing work of the device is completed, after a fish catches a hook, firstly, the second self-locking button is dragged to draw the second self-locking button out of the dentate groove at the edge of the disc-shaped conducting block, then the fishing line trigger rod is dragged, the friction force between the fishing line and the fishing line clamping groove is utilized to force the locking head at one end of the fishing line trigger rod to be separated from the locking hole at the bottom end of the first self-locking button, the first self-locking button moves upwards under the action of the third reset spring, the fishing line in the fishing line locking groove hole is unlocked, at the moment, the fishing line continuously contracts under the action of the elastic potential energy of the return spring, the diameter of one end of the return spring close to the fixed shaft is gradually reduced, so that the pulling force of the return spring is increased when the fish is dragged, the pulling force is increased, the pulling and releasing work of the fishing line continuously consumes the physical force of the fish along with the dragging process of the fish, the fish is not struggled any more, then the return spring drags the fish to work through the, the debugging is changed in the person of facilitating the use maintenance, and the split type design of shell main part reduces the degree of difficulty that the user debugged the maintenance simultaneously, and the device structure is compared in traditional fishing rod fishing process, has optimized the process of fishing greatly, reduces user's physical demands, and the probability of the unexpected injury of effectual reduction user increases the enjoyment of user's fishing.

Drawings

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

FIG. 2 is a combination view of the locking wire housing and locking wire table of the present invention;

FIG. 3 is a combination view of a first latching button and a locking wire housing of the present invention;

FIG. 4 is a combination view of the housing body and the lockwire housing of the present invention;

FIG. 5 is a view of the combination of the main body of the housing, the return spring and the stationary shaft according to the present invention;

FIG. 6 is a view of the second latching button of the present invention engaged with the toothed recess;

FIG. 7 is an assembled view of the fishing line firing bar and locking head of the present invention;

fig. 8 is a combination view of the check tooth and the check steel piece of the present invention.

In the figure: 1. a housing main body; 2. a return spring; 3. a fixed shaft; 4. a disc-shaped lead block; 5. a toothed groove; 6. a locking wire housing; 7. rotating the handle; 8. fishing line; 9. a first self-locking button; 10. an outlet; 11. a wire locking table; 12. a first stopper; 13. a fishing line triggering rod; 14. a first return spring; 15. a locking head; 16. a second self-locking button; 17. a clamping block; 18. an L-shaped clamping groove; 19. a sleeve; 20. a second return spring; 21. a second limiting block; 22. a third limiting block; 23. a third return spring; 24. a locking wire slot hole; 25. a locking hole; 26. a fixing ring; 27. a screw hole; 28. stopping the teeth reversely; 29. a non-return steel sheet.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1 to 8, the present invention provides a technical solution: a sea fishing plate comprises a shell body 1, as shown in figures 1 and 4, a fixing ring 26 is fixedly connected to the middle of the outer surface of one side of the shell body 1, the fixing ring 26 is used for fixing a device by using a foreign object, an L-shaped clamping groove 18 is fixedly connected to the position, close to the upper end, of the outer surface of the other side of the shell body 1, a clamping block 17 is arranged inside the L-shaped clamping groove 18, a locking line shell 6 is fixedly connected to the outer surface of one side of the clamping block 17, the shell body 1 and the locking line shell 6 are in a split connection design through the L-shaped clamping groove 18 and the clamping block 17, maintenance and replacement are convenient, a fixing shaft 3 is movably connected to the central position inside the shell body 1, a return spring 2 is wound on the outer surface of the fixing shaft 3, one end of the return spring 2 is fixedly connected with the fixing shaft 3, a disc-shaped wire block 4 is fixedly connected to the other end, the outer surface of the disc-shaped lead block 4 is provided with a fishing line 8, the fishing line 8 is wound on the outer surface of the disc-shaped lead block 4 and is fixedly connected with the disc-shaped lead block 4, the diameter of the return spring 2 is changed from thin to thick from one end close to the fixed shaft 3, so that the pulling force of the return spring 2 is larger when the return spring is pulled, the shell main body 1 is divided into a detachable connection structure of the front shell and the rear shell, screw holes 27 are formed in corners of the front shell and the rear shell, and the front shell and the rear shell are combined into the shell main body 1 through the screw holes 27 by using external bolts, so that a user can conveniently detach;

as shown in fig. 5 and 8, a toothed groove 5 is formed in the edge of the outer surface of the rear end of the disc-shaped lead block 4, a check tooth 28 is arranged at a position, close to the fixed shaft 3, of the outer surface of the rear end of the housing body 1, the check tooth 28 is fixedly connected with the fixed shaft 3, a check steel sheet 29 is fixedly connected at a position, close to the check tooth 28, of the outer surface of the rear end of the housing body 1, the check tooth 28 is movably connected with the check steel sheet 29, the check tooth 28 is movably connected with the housing body 1, a rotating handle 7 is fixedly connected at the center position of the outer surface of the rear end of the check tooth 28, the pre-tightening force of the return spring 2 is adjusted through the rotating handle 7 and the handle, and the check tooth 28 and the check steel sheet 29 are used in cooperation for fixing the rotating handle 7;

as shown in fig. 2, 3 and 7, a wire locking table 11 is fixedly connected inside the wire locking housing 6, a first self-locking button 9 penetrates through the outer surface of the upper end of the wire locking housing 6, one end of the first self-locking button 9 penetrates through the wire locking table 11 and extends to the lower end of the wire locking table 11, a locking hole 25 is fixedly connected to the bottom end of the first self-locking button 9, a third limiting block 22 and a third return spring 23 are arranged on the outer surface of the first self-locking button 9, the third return spring 23 is located between the wire locking housing 6 and the third limiting block 22, the third limiting block 22 is fixedly connected to the first self-locking button 9, the third limiting block 22 and the third return spring 23 are located on the upper side of the wire locking table 11, a wire locking slot 24 is formed at a position, which is close to the locking hole 25, a wire outlet 10 is formed in the middle part of the outer surface of one side of the wire locking housing 6, which is far away from the housing main body, one end of the fishing line 8 is fixedly connected with the disc-shaped wire block 4, the other end of the fishing line runs through the shell body 1, the locking line shell 6 and the locking line slot hole 24 and extends to the outer surface of the locking line shell 6 through the wire outlet 10, a fishing line trigger rod 13 is arranged inside the locking line shell 6, the fishing line trigger rod 13 is arranged on the lower side of the locking line table 11, a first limiting block 12 and a first reset spring 14 are arranged on the outer surface of the fishing line trigger rod 13 in a sleeved mode, the first reset spring 14 is fixedly connected with the first limiting block 12 at one end, the other end of the first reset spring 14 is fixedly connected with the inner surface of the locking line shell 6, one end of the fishing line trigger rod 13 runs through and extends to the outer surface of the locking line shell 6, and the other end of the fishing line trigger rod 13 is fixedly connected with the locking head 15.

As shown in fig. 6, a sleeve 19 is fixedly connected to the center of the outer surface of the other side of the housing body 1, a second self-locking button 16 is disposed inside the sleeve 19, one end of the second self-locking button 16 penetrates and extends to the outer surface of the sleeve 19, and the other end of the second self-locking button 16 penetrates through the housing body 1 and extends to the inside of the toothed groove 5, a second return spring 20 and a second stopper 21 are disposed on the outer surface of the second self-locking button 16, one end of the second return spring 20 is fixedly connected to the second stopper 21, and the other end of the second return spring is fixedly connected to the outer surface of the housing body 1, the second self-locking button 16 is used in cooperation with the second return spring 20 and the toothed groove 5 to lock or unlock the disc-shaped lead block 4, and a fishing line slot is also disposed at one end of the second self.

The invention mainly aims at a sea fishing disk, when the sea fishing disk is used, firstly, a certain length of fishing line 8 is fixed and wound on the outer surface of a disk-shaped conducting wire block 4, then the fishing line 8 penetrates through a shell main body 1, a locking line shell 6 and a locking line slotted hole 24 and extends to the outer surface of the locking line shell 6 through a line outlet 10, then the fishing line 8 is clamped on a fishing line clamping groove arranged at one end of a fishing line trigger rod 13, then the fishing line clamping groove is clamped in the fishing line clamping groove on a second self-locking button 16 again, the rest part of fishing line 8 is used for binding a buoy, a lead block fishhook and the like, when the sea fishing disk is not used, the second self-locking button 16 and the disk-shaped conducting wire block 4 are in an opening and closing state under the elastic expansion and contraction of a second reset spring 20, when a user uses the float lead block to throw the fishing hook on the sea surface or lake surface, then the first self-locking button 9 is pressed, the first self-locking button 9, then the fishing line 8 in the locking line slotted hole 24 is locked under the action of the locking line table 11 and the locking line slotted hole 24 while the first self-locking button 9 moves downwards, then the fishing line trigger rod 13 is slightly pulled to release, the locking head 15 and the locking hole 25 are overlapped to fix the position of the first self-locking button 9, then a user turns over the handle to rotate the fixing shaft 3 through the rotating handle 7 so as to adjust the pretightening force of the return spring 2, the check teeth 28 rotate simultaneously while rotating the rotating handle 7 until the fishing line 8 in the shell body 1 and the fishing line 8 in the locking line shell 6 are in a tight state, then the user slightly presses the second self-locking button 16 to force one end of the second self-locking button 16 to be inserted into the dentate groove 5 arranged on the outer edge of the disc-shaped lead block 4, and simultaneously fixes the position of the second self-locking button 16 in the dentate groove 5 under the pretightening force of the return spring 2, then the handle 7 is continuously rotated to further increase the elastic potential energy of the return spring 2, the check steel sheet 29 fixes the rotation angle of the check tooth 28, then the user fixes the shell main body 1 with the foreign object through the fixing ring 26, the whole fishing work of the device is completed, when a fish catches the fish, the second self-locking button 16 is firstly dragged to draw the second self-locking button 16 out of the dentate groove 5 at the edge of the disc-shaped conducting wire block 4, then the fishing line trigger rod 13 is dragged, the locking head 15 at one end of the fishing line trigger rod 13 is forced to be separated from the locking hole 25 at the bottom end of the first self-locking button 9 by utilizing the friction force of the fishing line 8 and the fishing line clamping groove, the first self-locking button 9 moves upwards under the action of the third return spring 23, the fishing line 8 in the locking line groove hole 24 is unlocked, at the moment, the fishing line 8 continuously contracts under the action of the elastic potential energy of the return spring 2, and the diameter of one end of, thereby lead to return spring 2 when the fish drags, it is more and more big to drag the dynamics, along with the continuous physical power of consuming the fish of the work of receiving and releasing of fish tape 8 is realized to the process of dragging of fish, no longer struggle until the fish, then return spring 2 drags the work of fishing through fish tape 8, locking wire shell 6 and shell main part 1 pass through L type draw-in groove 18 and 17 split type connections of fixture block, the debugging is changed in the person of facilitating the use maintenance, the split type design of shell main part 1 reduces the degree of difficulty that the user debugged the maintenance simultaneously, the device structure is compared in traditional fishing rod fishing process, the process of fishing has been optimized greatly, reduce user's physical demands, the probability of the unexpected injury of effectual reduction user, increase the enjoyment of user's fishing.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. A sea fishing plate comprises a shell body (1) and is characterized in that a fixing ring (26) is fixedly connected to the middle of the outer surface of one side of the shell body (1), an L-shaped clamping groove (18) is fixedly connected to the position, close to the upper end, of the outer surface of the other side of the shell body (1), a clamping block (17) is arranged inside the L-shaped clamping groove (18), a locking line shell (6) is fixedly connected to the outer surface of one side of the clamping block (17), a fixing shaft (3) is movably connected to the central position inside the shell body (1), a return spring (2) is wound on the outer surface of the fixing shaft (3), one end of the return spring (2) is fixedly connected with the fixing shaft (3), a disc-shaped lead block (4) is fixedly connected to the other end of the return spring (2), and the other end of the return spring (2) is fixedly connected to, the outer surface of the disc-shaped wire block (4) is provided with a fishing line (8), the fishing line (8) is wound on the outer surface of the disc-shaped wire block (4) and is fixedly connected with the disc-shaped wire block (4), a toothed groove (5) is formed in the edge of the outer surface of the rear end of the disc-shaped wire block (4), a reverse stopping tooth (28) is arranged at the position, close to the fixed shaft (3), of the outer surface of the rear end of the shell body (1), the reverse stopping tooth (28) is fixedly connected with the fixed shaft (3), a reverse stopping steel sheet (29) is fixedly connected at the position, close to the reverse stopping tooth (28), of the outer surface of the rear end of the shell body (1), the reverse stopping tooth (28) is movably connected with the reverse stopping steel sheet (29), the reverse stopping tooth (28) is movably connected with the shell body (1), a rotary handle (7) is fixedly connected at the center position of the outer surface of the rear end of the reverse stopping tooth (28), and a wire, a first self-locking button (9) penetrates through the outer surface of the upper end of the locking line shell (6), one end of the first self-locking button (9) penetrates through the locking line platform (11) and extends to the lower end of the locking line platform (11), a locking hole (25) is fixedly connected to the bottom end of the first self-locking button (9), a third limiting block (22) and a third reset spring (23) are arranged on the outer surface of the first self-locking button (9), the third reset spring (23) is located between the locking line shell (6) and the third limiting block (22), the third limiting block (22) is fixedly connected with the first self-locking button (9), the third limiting block (22) and the third reset spring (23) are located on the upper side of the locking line platform (11), a locking line slotted hole (24) is formed in the position, close to the locking hole (25), a line outlet (10) is formed in the middle of the outer surface of one side, far away from the shell main body (1), of the locking line shell (6), one end of the fishing line (8) is fixedly connected with the disc-shaped wire block (4), the other end of the fishing line penetrates through the shell main body (1), the locking line shell (6) and the locking line slotted hole (24) and extends to the outer surface of the locking line shell (6) through the line outlet (10), a fishing line trigger rod (13) is arranged inside the locking line shell (6), the fishing line trigger rod (13) is arranged on the lower side of the locking line table (11), a first limiting block (12) and a first reset spring (14) are arranged on the outer surface of the fishing line trigger rod (13), the first reset spring (14) is sleeved on the outer surface of the fishing line trigger rod (13), one end of the first reset spring (14) is fixedly connected with the first limiting block (12), the other end of the first reset spring is fixedly connected with the inner surface of the locking line shell (6), one end of the fishing line trigger rod (13) penetrates through and extends to the outer surface of the locking line shell (6), and the other end of the shell body (1) is fixedly connected with a locking head (15), the center of the outer surface of the other side of the shell body (1) is fixedly connected with a sleeve (19), a second self-locking button (16) is arranged inside the sleeve (19), one end of the second self-locking button (16) penetrates through and extends to the outer surface of the sleeve (19), the other end of the second self-locking button penetrates through the shell body (1) and extends to the inside of the dentate groove (5), a second reset spring (20) and a second limiting block (21) are arranged on the outer surface of the second self-locking button (16), one end of the second reset spring (20) is fixedly connected with the second limiting block (21), and the other end of the second reset spring is fixedly connected with the outer surface of the shell body.

2. A sea fishing reel according to claim 1, characterized in that: the number of the tooth-shaped grooves (5) is a plurality, and the tooth-shaped grooves are equidistantly arranged on the outer surface of the disc-shaped lead block (4).

3. A sea fishing reel according to claim 1, characterized in that: the diameters of the ends, close to the fixed shaft (3), of the return springs (2) are sequentially decreased progressively.

4. A sea fishing reel according to claim 1, characterized in that: the fishing line clamping groove is formed in one end, far away from the locking head (15), of the fishing line trigger rod (13), and the fishing line (8) is clamped inside the fishing line clamping groove.

5. A sea fishing reel according to claim 1, characterized in that: l type draw-in groove (18) and fixture block (17) match each other, shell main part (1) is connected with lockwire shell (6) split type.

6. A sea fishing reel according to claim 1, characterized in that: the first self-locking button (9) corresponds to the position of the fishing line trigger rod (13), and the locking hole (25) is matched with the locking head (15).

7. A sea fishing reel according to claim 1, characterized in that: one end of the rotating handle (7) far away from the fixed shaft (3) is hinged with a handle, and when the handle is perpendicular to the rotating handle (7), the handle and the rotating handle (7) are of a Z-shaped structure.

8. A sea fishing reel according to claim 1, characterized in that: the second limiting block (21) is movably connected with the sleeve (19), and the length of the second self-locking button (16) is larger than that of the sleeve (19).

9. A sea fishing reel according to claim 1, characterized in that: shell main part (1) divide into procapsid and the detachable connection structure of back casing, screw hole (27) have all been seted up to the corner of procapsid and back casing.