CN113266742A

CN113266742A - Computer display device assembly control device

Info

Publication number: CN113266742A
Application number: CN202110534805.4A
Authority: CN
Inventors: 刘春英
Original assignee: Individual
Current assignee: Individual
Priority date: 2021-05-17
Filing date: 2021-05-17
Publication date: 2021-08-17
Anticipated expiration: 2041-05-17
Also published as: CN113266742B

Abstract

The invention belongs to the technical field of computers, and particularly relates to a computer display device assembly control device which comprises a bottom plate, a fixing plate fixedly arranged on the bottom surface of the bottom plate, a display screen arranged on the inner side wall of the fixing plate, a fixing box fixed on the front surface of the fixing plate and a PLC (programmable logic controller) arranged in the fixing box, wherein the fixing plate is fixedly arranged on the inner side wall of the fixing plate; personnel are at cell-phone end or control center remote control PLC controller, PLC controller starter motor, motor and first fluted disc are realized rotating the inside display screen of fixed plate, angle sensor detects turned angle simultaneously, and accomplish the feedback, until with accurate rotation to required angle of display screen, improve the convenience of use, through the adjustment subassembly that sets up, start a plurality of second electric putter, the bottom that its telescopic shaft drove the display screen moves forward or backward, the cooperation slide cartridge, slide bar and universal joint, make the top of display screen can remove thereupon, be convenient for look up or look down the form to the display device subassembly and finely tune.

Description

Computer display device assembly control device

Technical Field

The invention belongs to the technical field of computers, and particularly relates to a control device for a computer display device assembly.

Background

The computer is commonly known as a computer, is a modern electronic computing machine for high-speed computation, can carry out numerical calculation, can carry out logic computation again, still has the memory function, the display device subassembly is the medium of computer display content, when using, need control the display device subassembly, because of can not long-range and accurate control the turned angle of display device subassembly, the convenience that has reduced personnel's use, and inconvenient looking up or looking down the form to the display device subassembly and finely tune, be unfavorable for adjusting according to personnel's needs, have certain limitation.

In order to solve the above problems, the present application provides a control device for a computer display device assembly.

Disclosure of Invention

To solve the problems set forth in the background art described above. The invention provides a computer display device assembly control device which has the characteristics of remotely and accurately controlling the rotation angle of a display device assembly and facilitating fine adjustment of looking up or down on the display device assembly.

In order to achieve the purpose, the invention provides the following technical scheme: a computer display device assembly control device comprises a bottom plate, a fixing plate fixedly arranged on the bottom surface of the bottom plate, a display screen arranged on the inner side wall of the fixing plate, a fixing box fixed on the front surface of the fixing plate and a PLC (programmable logic controller) arranged in the fixing box, wherein a protective shell is arranged on the outer side wall of the fixing plate, a motor is arranged on the surface of one side, close to the fixing plate, of the bottom plate, and a first fluted disc is arranged on an output shaft of the motor;

the rotary component comprises a fixed rod, a second fluted disc, a connecting plate, a first cylinder, a connecting rod, a clamping plate, an angle sensor and a second cylinder, wherein the fixed rod is arranged between the fixed plate and the display screen to realize a rotating function, the upper surface of the fixed plate is provided with a through groove, the fixed rod is in sliding connection with the inside of the through groove, the second fluted disc is arranged at the top of the fixed rod, the second fluted disc is in meshing connection with the first fluted disc, the connecting plate is rotatably connected with the inner top surface of the fixed plate and is close to the bottom end of the fixed rod, the first cylinder is arranged at the inner bottom surface of the connecting plate, the connecting rod is arranged on a telescopic shaft of the first cylinder, the clamping plate is fixedly arranged at the bottom surface of the connecting rod, the angle sensor is arranged at the outer side wall of the connecting rod, and the second cylinder is arranged inside the connecting plate, and the telescopic shaft with dead lever fixed connection, the upper surface intermediate position department that the protective housing was installed to the lateral wall of fixed plate has seted up the mounting groove, the cardboard is located the inside of mounting groove.

Preferably, the computer display device assembly control device according to the present invention is further provided with a connecting rod, wherein the connecting rod is fixedly connected to the connecting rod at a middle position thereof.

Preferably, the front surface and the rear surface of the inner side wall of the fixed plate are uniformly provided with a plurality of first grooves, the front surface of the protective shell is uniformly provided with a second groove, balls are connected between the first grooves and the second grooves in the same horizontal line in a rolling manner, the upper surface of the protective shell is symmetrically provided with connecting springs, and hooks at two ends of the connecting springs are respectively and fixedly connected with the protective shell and the fixed plate.

Preferably, the motor, the angle sensor, the first cylinder and the second cylinder are in signal connection with the PLC controller.

Preferably, the PLC controller is in signal connection with a mobile phone terminal and a control center.

The computer display device assembly control device preferably further comprises a reinforcing assembly arranged on the outer side wall of the clamping plate and playing a reinforcing role;

the reinforcing component comprises a fixing seat, a first electric push rod and a fixture block, a fixing groove is formed in the clamping plate, the fixing seat is arranged in the fixing groove and fixedly connected with the clamping plate, the outer side wall of the fixing seat is symmetrically installed on the first electric push rod, the fixture block is fixed to the telescopic shaft of the first electric push rod, a concave connecting groove is formed in the mounting groove, and the fixture block is located in the connecting groove.

Preferably, as a control device of a computer display device assembly according to the present invention, a connecting cylinder is installed at an inner top end of the installation groove, and the connecting cylinder is fixedly connected to the protective housing.

Preferably, the computer display device assembly control device of the present invention further comprises an adjusting assembly disposed between the base plate and the fixing plate for adjusting;

the adjusting component comprises a vertical plate, a hollow sliding barrel, a sliding rod, a second electric push rod and a universal joint, the vertical plate is welded on the bottom surface of the bottom plate and is arranged in parallel with the fixed plate, the sliding barrel is installed on the top end of the vertical plate, the sliding rod is connected inside the sliding barrel in a sliding mode, the universal joint is installed on the end surface of the sliding rod and is fixedly connected with the display screen, the second electric push rod is installed on the bottom surface of the vertical plate, and the telescopic end of the second electric push rod is fixedly connected with the display screen.

Preferably, the slide cylinders and the second electric push rods are symmetrically arranged on the surface of the vertical plate, and the number of the slide cylinders is the same as that of the second electric push rods.

Preferably, the adjusting assembly further includes a first spring, a clamping cylinder, a second spring and an arc plate, the first spring is fixedly disposed inside the sliding cylinder, an end surface of the first spring is fixedly connected to the sliding rod, the clamping cylinder is mounted inside the sliding rod and near one end of the sliding rod, the plurality of second springs are symmetrically mounted on an inner side wall of the clamping cylinder, the arc plate is fixed to an end surface of the plurality of second springs, and the arc plate is sleeved on an outer side wall of the sliding rod.

Compared with the prior art, the invention has the beneficial effects that:

through the runner assembly who sets up, personnel are at cell-phone end or control center remote control PLC controller, PLC controller starter motor, motor and first fluted disc are realized rotating the inside display screen of fixed plate, angle sensor detects turned angle simultaneously, and accomplish the feedback, until with accurate rotation to required angle of display screen, improve the convenience of use, adjustment subassembly through setting up, start a plurality of second electric putter, the bottom that its telescopic shaft drove the display screen moves forward or backward, the cooperation slide cartridge, slide bar and universal joint, make the top of display screen can remove thereupon, be convenient for look up or look down the form to the display device subassembly and finely tune, do benefit to according to required regulation.

Drawings

The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention and not to limit the invention. In the drawings:

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

FIG. 2 is a sectional view showing the connection of the slide cylinder, the first spring, the lock cylinder and the slide rod in the present invention;

FIG. 3 is a perspective view of the cartridge, second spring and arcuate plate of the present invention;

FIG. 4 is a right side view of the connection plate, the first cylinder, the connection rod, the clamping plate, the protective housing and the fixing plate of the present invention;

FIG. 5 is a sectional view of the fixing rod, the connecting plate, the second cylinder, the first cylinder and the connecting rod in the present invention;

FIG. 6 is an installation view of the reinforcement assembly and protective shell of the present invention;

FIG. 7 is a schematic diagram of the present invention;

in the figure: 10. a base plate; 11. a fixing plate; 111. a first groove; 12. a display screen; 13. a protective shell; 131. a second groove; 14. a fixing box; 15. a PLC controller; 16. a motor; 17. a first fluted disc; 18. a ball bearing; 19. a connecting spring;

20. a rotating assembly; 21. fixing the rod; 22. a second fluted disc; 23. a connecting plate; 24. a first cylinder; 25. a connecting rod; 251. a bearing rod; 26. clamping a plate; 27. an angle sensor; 28. a second cylinder;

30. an adjustment assembly; 31. a vertical plate; 32. a slide cylinder; 33. a slide bar; 34. a second electric push rod; 35. a universal joint; 36. a first spring; 37. clamping the cylinder; 38. a second spring; 39. an arc-shaped plate;

40. a reinforcement assembly; 41. fixing grooves; 42. a fixed seat; 43. a first electric push rod; 44. and (7) clamping blocks.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the 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.

Example 1

As shown in fig. 1, 4 and 5;

a computer display device assembly control device comprises a bottom plate 10, a fixing plate 11 fixedly arranged on the bottom surface of the bottom plate 10, a display screen 12 arranged on the inner side wall of the fixing plate 11, a fixing box 14 fixed on the front surface of the fixing plate 11 and a PLC (programmable logic controller) 15 arranged inside the fixing box 14.

In this embodiment: computer display device subassembly controlling means main part comprises bottom plate 10, fixed plate 11, display screen 12, fixed box 14 and PLC controller 15, nevertheless has the remote and accurate turned angle to the display device subassembly of can not be controlled, reduces the problem of use convenience, to this problem, has added runner assembly 20 in this scheme.

Further:

with the above in mind: the outer side wall of the fixed plate 11 is provided with a protective shell 13, the bottom plate 10 is provided with a motor 16 on the surface of one side close to the fixed plate 11, the output shaft of the motor 16 is provided with a first fluted disc 17, the display screen device further comprises a rotating component 20 which is arranged between the fixed plate 11 and the display screen 12 and realizes the rotating function, the rotating component 20 comprises a fixed rod 21, a second fluted disc 22, a connecting plate 23, a first air cylinder 24, a connecting rod 25, a clamping plate 26, an angle sensor 27 and a second air cylinder 28, the upper surface of the fixed plate 11 is provided with a through groove, the fixed rod 21 is connected with the through groove in a sliding manner, the second fluted disc 22 is arranged on the top of the fixed rod 21, the second fluted disc 22 is connected with the first fluted disc 17 in a meshing manner, the connecting plate 23 is connected with the inner top surface of the fixed plate 11 in a rotating manner and is close to the bottom end of the fixed rod 21, the first air cylinder 24 is arranged on the inner bottom surface of the connecting plate 23, the connecting rod 25 is arranged on the telescopic shaft of the first air cylinder 24, cardboard 26 is fixed to be set up in the bottom surface of connecting rod 25, and angle sensor 27 installs the lateral wall at connecting rod 25, and second cylinder 28 installs in the inside of connecting plate 23, and telescopic shaft and dead lever 21 fixed connection, and protective housing 13's upper surface intermediate position department has seted up the mounting groove is installed to the lateral wall of fixed plate 11, and cardboard 26 is located the inside of mounting groove.

In this embodiment: protect the lateral wall of display screen 12 through protective housing 13, reduce the probability that display screen 12 received the external damage, but through PLC controller 15 starter motor 16, because of first fluted disc 17 and dead lever 21 mesh mutually on the motor 16, and connecting plate 23 and fixed plate 11 rotate and connect, drive connecting plate 23 in step, second cylinder 28, rotate with first cylinder 24 and connect, and then cardboard 26 of synchronous electric connecting rod 25 bottom rotates, because of cardboard 26 and display screen 12 and protective housing 13 fixed connection, and then drive display screen 12 and rotate, angle sensor 27 detects turned angle in real time and feeds back to PLC controller 15 department, so as to reach the problem of accurate control turned angle, improve the convenience of using.

Further, the method comprises the following steps:

in an alternative embodiment: a receiving rod 251 is fixedly connected to the middle of the connecting rod 25, and the connecting rod 25 is divided into two by the receiving rod 251.

In this embodiment, it should be noted that: the adapting rod 251 is made of a silica gel material with certain hardness and certain elasticity, so that the clamping plate 26 can be conveniently installed and detached from the protective shell 13.

Further, the method comprises the following steps:

in an alternative embodiment: a plurality of first grooves 111 have evenly been seted up to the inside wall front and back of fixed plate 11, and second groove 131 has evenly been seted up to the front surface of protective housing 13, and roll connection has ball 18 between first groove 111 and the second groove 131 that are in same water flat line, and the upper surface symmetry of protective housing 13 is equipped with coupling spring 19, and coupling spring 19's both ends couple respectively with protective housing 13 and fixed plate 11 fixed connection.

In this embodiment, it should be noted that: the balls 18 in the first and

second grooves

111 and 131 make the rotation between the protective shell 13 and the fixed plate 11 smooth, which facilitates to adjust the rotation direction of the display 12, and the plurality of connecting springs 19 make the protective shell 13 and the fixed plate 11 have a certain reinforcing effect, which can be disassembled according to the requirement.

Further, the method comprises the following steps:

in an alternative embodiment: the motor 16, the angle sensor 27, the first cylinder 24 and the second cylinder 28 are all in signal connection with the PLC controller 15.

In this embodiment, it should be noted that: be convenient for start or close motor 16 through PLC controller 15, be convenient for control the telescopic shaft of first cylinder 24 and second cylinder 28, be convenient for break away from runner assembly 20 from the lateral wall of protective housing 13, so that other adjustments are made to protective housing 13 or display screen 12, be convenient for detect the turned angle of protective housing 13 through angle sensor 27, be the turned angle of display screen 12 promptly, and feed back to PLC controller 15 department, make things convenient for personnel to control.

Further, the method comprises the following steps:

in an alternative embodiment: the PLC 15 is in signal connection with a mobile phone end and a control center.

In this embodiment, it should be noted that: personnel can control the PLC 15 through a mobile phone end or a control center so as to complete remote rotation angle of the display screen 12.

As shown in fig. 4 and 6;

this computer display device subassembly controlling means, still including setting up the reinforced component 40 that plays the reinforcing effect at 26 lateral walls of cardboard, reinforced component 40 includes fixing base 42, first electric putter 43 and fixture block 44, fixed slot 41 has been seted up to 26 inside of cardboard, fixing base 42 sets up the inside at fixed slot 41, and with 26 fixed connection of cardboard, the lateral wall of fixing base 42 is installed to first electric putter 43 symmetry, fixture block 44 fixes the telescopic shaft at first electric putter 43, the spread groove of indent is seted up to the inside of spread groove, fixture block 44 is located the inside of spread groove.

In this embodiment: originally, form, fixture block 44 is located the inside of fixed slot 41, inserts cardboard 26 to the inside back of mounting groove, starts first electric putter 43 through PLC controller 15, and first electric putter 43 drives fixture block 44 and stretches out, inserts the inside of connecting groove until fixture block 44, can accomplish the reinforcement between cardboard 26 and the protective housing 13, improves protective housing 13 and display screen 12 at the inside stability of fixed plate 11.

It should be noted that: first electric putter 43 and PLC controller 15 signal connection make things convenient for PLC controller 15 long-range to control first electric putter 43.

Further, the method comprises the following steps:

in an alternative embodiment: the connecting cylinder is installed on the inside top of mounting groove, connecting cylinder and protective housing 13 fixed connection.

In this embodiment, it should be noted that: the connecting cylinder is the silica gel material, and antifriction has certain elasticity to when cardboard 26 inserts the mounting groove, frictional force when improving the contact improves and connects the compactness.

As shown in fig. 1, 2 and 3;

this computer display device subassembly controlling means, still including setting up the adjustment subassembly 30 that plays the adjustment effect between bottom plate 10 and fixed plate 11, adjustment subassembly 30 includes riser 31, inside hollow slide cartridge 32, slide bar 33, second electric putter 34 and universal joint 35, riser 31 welds the bottom surface at bottom plate 10, and be parallel arrangement with fixed plate 11, the top at riser 31 is installed to slide cartridge 32, slide bar 33 sliding connection is in the inside of slide cartridge 32, the terminal surface at slide bar 33 is installed to universal joint 35, and with display screen 12 fixed connection, the bottom surface at riser 31 is installed to second electric putter 34, the flexible end of second electric putter 34 and display screen 12 fixed connection universal joint 35 sliding connection are in the inside of second electric putter 34, and with display screen 12 fixed connection.

In this embodiment: and starting a second electric push rod 34 on the vertical plate 31, driving the display screen 12 to swing by a telescopic shaft, and simultaneously, sliding the sliding rod 33 in cooperation with the universal joint 35 to slide in the sliding barrel 32, so that the top of the display screen 12 is matched with the swing of the lower part to change along with the sliding, and the overlooking or overlooking degree of the display screen 12 is adjusted to realize fine adjustment.

It should be noted that: the bottom surface of the protective shell 13 can be provided with a ball 18, so that the adjustment process of looking up or looking down is smooth.

It should be noted that: the second electric push rod 34 is in signal connection with the PLC controller 15, so that the PLC controller 15 can control the second electric push rod 34 to be started or closed.

Further, the method comprises the following steps:

in an alternative embodiment: the sliding cylinders 32 and the second electric push rods 34 are symmetrically arranged on the surface of the vertical plate 31, and the number of the sliding cylinders 32 is the same as that of the second electric push rods 34.

In this embodiment, it should be noted that: the display screen 12 can be stably fixed on the telescopic shafts of the second electric push rods 34 and is matched with the sliding cylinders 32, so that the stability of the display screen 12 is improved.

Further, the method comprises the following steps:

in an alternative embodiment: the adjusting assembly 30 further comprises a first spring 36, a clamping cylinder 37, a second spring 38 and an arc-shaped plate 39, the first spring 36 is fixedly arranged inside the sliding cylinder 32, the end surface of the first spring 36 is fixedly connected with the sliding rod 33, the clamping cylinder 37 is arranged inside the sliding rod 33 and close to one end of the sliding rod 33, the second springs 38 are symmetrically arranged on the inner side wall of the clamping cylinder 37, the arc-shaped plate 39 is fixed on the end surface of the second springs 38, and the arc-shaped plate 39 is sleeved on the outer side wall of the sliding rod 33.

In this embodiment, it should be noted that: when the sliding rod 33 extends and contracts, the first spring 36 is stretched to generate a certain retraction force, so that the sliding rod 33 is kept in place, the display screen 12 is prevented from swinging too fast, and the stability of the sliding rod 33 is optimized again through the cooperation of the second spring 38 and the arc-shaped plate 39.

Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that changes may be made in the embodiments and/or equivalents thereof without departing from the spirit and scope of the invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A computer display device assembly control device, comprising a base plate (10), a fixing plate (11) fixedly arranged on the bottom surface of the base plate (10), a display screen (12) arranged on the inner side wall of the fixing plate (11), a fixing box (14) fixed on the front surface of the fixing plate (11) and a PLC controller (15) arranged inside the fixing box (14), characterized in that: a protective shell (13) is installed on the outer side wall of the fixed plate (11), a motor (16) is installed on the surface of the bottom plate (10) close to one side of the fixed plate (11), and a first fluted disc (17) is installed on an output shaft of the motor (16);

the rotary assembly (20) is arranged between the fixing plate (11) and the display screen (12) and has a rotating function, the rotary assembly (20) comprises a fixing rod (21), a second fluted disc (22), a connecting plate (23), a first air cylinder (24), a connecting rod (25), a clamping plate (26), an angle sensor (27) and a second air cylinder (28), a through groove is formed in the upper surface of the fixing plate (11), the fixing rod (21) is in sliding connection with the inside of the through groove, the second fluted disc (22) is installed at the top of the fixing rod (21), the second fluted disc (22) is in meshing connection with the first fluted disc (17), the connecting plate (23) is rotatably connected to the top surface inside the fixing plate (11) and is close to the bottom end of the fixing rod (21), and the first air cylinder (24) is installed at the bottom surface inside the connecting plate (23), connecting rod (25) are installed the telescopic shaft of first cylinder (24), cardboard (26) are fixed to be set up the bottom surface of connecting rod (25), angle sensor (27) are installed the lateral wall of connecting rod (25), second cylinder (28) are installed the inside of connecting plate (23), and the telescopic shaft with dead lever (21) fixed connection, the upper surface intermediate position department that the protective housing (13) was installed to the lateral wall of fixed plate (11) has seted up the mounting groove, cardboard (26) are located the inside of mounting groove.

2. The computer display device assembly control device of claim 1, wherein: the middle position of the connecting rod (25) is fixedly connected with a bearing rod (251), and the bearing rod (251) divides the connecting rod (25) into two parts.

3. The computer display device assembly control device of claim 1, wherein: a plurality of first recesses (111) have evenly been seted up to the inside wall front and back face of fixed plate (11), second recess (131) have evenly been seted up to the front surface of protective housing (13), are in same water flat line first recess (111) with roll connection has ball (18) between second recess (131), the upper surface symmetry of protective housing (13) is equipped with coupling spring (19), the both ends couple of coupling spring (19) respectively with protective housing (13) with fixed plate (11) fixed connection.

4. The computer display device assembly control device of claim 1, wherein: the motor (16), the angle sensor (27), the first air cylinder (24) and the second air cylinder (28) are in signal connection with the PLC (15).

5. The computer display device assembly control device of claim 1, wherein: the PLC (15) is in signal connection with a mobile phone end and a control center.

6. The computer display device assembly control device of claim 1, wherein: the outer side wall of the clamping plate (26) is provided with a reinforcing component (40) which plays a role of reinforcing;

consolidate subassembly (40) and include fixing base (42), first electric putter (43) and fixture block (44), fixed slot (41) have been seted up to the inside of cardboard (26), fixing base (42) set up the inside of fixed slot (41), and with cardboard (26) fixed connection, the lateral wall of fixing base (42) is installed to first electric putter (43) symmetry, fixture block (44) are fixed the telescopic shaft of first electric putter (43), the connecting groove of indent is seted up to the inside of mounting groove, fixture block (44) are located the inside of connecting groove.

7. The computer display device assembly control device of claim 1, wherein: the connecting cylinder is installed on the inside top end of mounting groove, the connecting cylinder with protective housing (13) fixed connection.

8. The computer display device assembly control device of claim 1, wherein: the adjusting component (30) is arranged between the bottom plate (10) and the fixing plate (11) and plays an adjusting role;

the adjusting component (30) comprises a vertical plate (31), a sliding cylinder (32) with a hollow interior, a sliding rod (33), a second electric push rod (34) and a universal joint (35), the vertical plate (31) is welded on the bottom surface of the bottom plate (10), and is arranged in parallel with the fixed plate (11), the sliding cylinder (32) is arranged at the top end of the vertical plate (31), the sliding rod (33) is connected inside the sliding barrel (32) in a sliding way, the universal joint (35) is arranged on the end surface of the sliding rod (33), and is fixedly connected with the display screen (12), the second electric push rod (34) is arranged on the bottom surface of the vertical plate (31), the flexible end of second electric putter (34) with display screen (12) fixed connection universal joint (35) sliding connection be in the inside of second electric putter (34), and with display screen (12) fixed connection.

9. The computer display device assembly control device of claim 8, wherein: the sliding cylinders (32) and the second electric push rods (34) are symmetrically arranged on the surface of the vertical plate (31), and the number of the sliding cylinders (32) is the same as that of the second electric push rods (34).

10. The computer display device assembly control device of claim 8, wherein: adjusting part (30) still includes first spring (36), card section of thick bamboo (37), second spring (38) and arc (39), first spring (36) are fixed to be set up the inside of slide cartridge (32), the terminal surface of first spring (36) with slide bar (33) fixed connection, card section of thick bamboo (37) are installed the inside of slide bar (33) and be close to the one end of slide bar (33), it is a plurality of second spring (38) symmetry is installed the inside wall of card section of thick bamboo (37), arc (39) are fixed a plurality of the terminal surface of second spring (38), arc (39) cover are established the lateral wall of slide bar (33).